CN103912689B - Valve needle assembly and electronic expansion valve comprising same - Google Patents
Valve needle assembly and electronic expansion valve comprising same Download PDFInfo
- Publication number
- CN103912689B CN103912689B CN201310007329.6A CN201310007329A CN103912689B CN 103912689 B CN103912689 B CN 103912689B CN 201310007329 A CN201310007329 A CN 201310007329A CN 103912689 B CN103912689 B CN 103912689B
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- component
- needle
- profile portion
- collar
- junction surface
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- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 230000005520 electrodynamics Effects 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims 16
- 238000000429 assembly Methods 0.000 claims 16
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 230000004048 modification Effects 0.000 description 11
- 238000012986 modification Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003467 diminishing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a valve needle assembly and an electronic expansion valve comprising the valve needle assembly. According to one aspect of the invention, the valve needle assembly comprises: a first member (20, 20A, 20B) connected to or integrated with a transmission part of a drive mechanism, the first member receiving power from the drive mechanism so as to be movable up and down in an axial direction (A); and a second member (30, 30A, 30B) including a needle, the second member being detachably connected with the first member, the second member being movable up and down in the axial direction (a) with up and down movement of the first member so that the needle can be engaged with or disengaged from the valve seat. According to the invention, the aim of adjusting the capacity of the electronic expansion valve can be realized by replacing valve needles with different specifications in a single electronic expansion valve, thereby expanding the application range of the electronic expansion valve and enhancing the universality.
Description
Technical field
The present invention relates to needle assembly and include the electric expansion valve of this needle assembly, more particularly, to there is at aspects such as assemblings the needle assembly of improvements and including the electric expansion valve of this needle assembly.
Background technology
Electric expansion valve is the vitals in cooling/heating system, is mainly used in being adjusted the flow of refrigerant fluid.In traditional electric expansion valve, usually, needle uses fixing connection (such as interference crimping) with drive disk assembly, or needle is formed integrally (being such as molded into one) with drive disk assembly.Thus, needle by demand dismounting and replacing, or can not can not dismantled and change easily and freely by demand.
Therefore, for electric expansion valve, it is desirable that, realize needle and freely change (especially, need not by any external tool), thus realize different Flow-rate adjustment abilities by the needle of replacing different size in same electric expansion valve, thus expand the range of application of electric expansion valve and strengthen versatility.
Here, it is noted that the technology contents provided in this part is intended to contribute to those skilled in the art's the understanding of the present invention, and not necessarily constitutes prior art.
Summary of the invention
According to an aspect of the present invention, a kind of needle assembly is provided, including: the first component, described first component is connected with the drive disk assembly of drive mechanism or integral with described drive disk assembly, and described first component receives power it is thus possible in axial direction move up and down from described drive mechanism；And second component, described second component includes needle, described second component is detachably connected with described first component, and described second component in axial direction can move up and down along with the up and down motion of described first component so that needle can engage with valve seat or separate.
According to a further aspect in the invention, it is provided that a kind of electric expansion valve, including drive mechanism；Valve seat；And as above needle assembly.
Accompanying drawing explanation
By detailed description referring to the drawings, the features and advantages of the present invention will become better understood by, in the accompanying drawings:
Fig. 1 is the longitudinal section of the needle assembly according to first embodiment of the invention；
Fig. 2 A-2H is the axonometric chart of all parts included by needle assembly according to first embodiment of the invention；
Fig. 3 is the longitudinal section of the needle assembly according to second embodiment of the invention；
Fig. 4 A-4D is the axonometric chart of all parts included by needle assembly according to second embodiment of the invention；
Fig. 5 is the longitudinal section of the needle assembly according to third embodiment of the invention；
Fig. 6 A-6E is the axonometric chart of all parts included by needle assembly according to third embodiment of the invention；
Fig. 7 is the axonometric chart of the mandrel being shown with the hole back-up ring according to the present invention and the assembly of dynamic ferrum；
Fig. 8 is the longitudinal section of the mandrel being shown with the hole back-up ring according to the present invention and the assembly of dynamic ferrum；
Fig. 9 A-9C is the axonometric chart of mandrel and all parts included by assembly of dynamic ferrum；
Figure 10 is the axonometric chart of the sleeve being shown with the hole back-up ring according to the present invention and the assembly of needle；
Figure 11 is the axonometric chart of the mandrel being shown with the shaft block ring according to the present invention and the assembly of axle bush；
Figure 12 is the longitudinal section of the mandrel being shown with the shaft block ring according to the present invention and the assembly of axle bush；
Figure 13 A-13C is the axonometric chart of mandrel and all parts included by assembly of axle bush；And
Figure 14 is the axonometric chart illustrating the back-up ring in correlation technique.
Detailed description of the invention
With reference to the accompanying drawings, describe the present invention by illustrative embodiments.Described in detail below merely for the sake of demonstration purpose to the present invention, and be definitely not the present invention and application thereof or the restriction of purposes.
First, the A-2H that sees figures.1.and.2 describes the needle assembly 10 according to first embodiment of the invention.Wherein, Fig. 1 is the longitudinal section of the needle assembly according to first embodiment of the invention, and Fig. 2 A-2H is the axonometric chart of all parts included by needle assembly according to first embodiment of the invention.
As it is shown in figure 1, needle assembly 10 can include sleeve 20 and needle 30.Sleeve 20 generally comprises: first/top section (internal thread part/anti-rotation feature) 22；And second/compresses lower section (needle junction surface) 24.Forming porose (such as through hole) in the first section 22 of sleeve 20, this hole has round-shaped, and is formed with female thread in this hole.Additionally, the periphery of the first section 22 of sleeve 20 has anti-rotational structure (the most non-circular or polyhedron periphery is preferably octahedra periphery as shown in Figure 2 E).First section 22 of sleeve 20 is for (not shown with the corresponding component of drive mechanism, lower end/the male end of the mandrel that the rotor with rotation motor of such as drive mechanism rotates integratedly) threaded, to receive power from drive mechanism such that it is able in axial direction A upper and lower translation in the case of the mandrel of drive mechanism rotates.Second section 24 of sleeve 20 is for engaging with needle 30 so that needle 30 can along with the up and down motion of sleeve 20 in axial direction A move up and down.It is pointed out here that in the first embodiment, sleeve 20 is used as the first component according to the present invention.
Here it is to be noted that it according to the present invention, drive mechanism is in addition to can being to include rotation motor (such as stepper motor) and the electrodynamic type drive mechanism of mandrel, it is also possible to be the electromagnetic driving mechanism including solenoid and movable plunger.In the case of using electromagnetic driving mechanism, first component (sleeve 20) can be permanently connected with the corresponding component (lower end of such as movable plunger) of drive mechanism, or even can form as one (the most integrally molded) with the corresponding component of drive mechanism.Thus, in the case of using electromagnetic driving mechanism, can be not provided with internal thread part and/or anti-rotation feature at the first component (sleeve 20) place, and the first component (sleeve 20) on the whole can also in other in addition to general cylindrical shape suitable shape.
Here, it is also to be noted that, according to the present invention, in the case of using electrodynamic type drive mechanism, first component (sleeve 20) can also be permanently connected with the corresponding component (lower end of such as mandrel) of drive mechanism, or even can form as one (the most integrally molded) with the corresponding component of drive mechanism.Thus, in the case of using electrodynamic type drive mechanism, can also be not provided with internal thread part and/or anti-rotation feature at the first component (sleeve 20) place, and the first component (sleeve 20) on the whole can also in other in addition to general cylindrical shape suitable shape.
Second section 24 of sleeve 20 can include body 241 and be arranged on the profile portion (sun junction surface) 242 of lower end of the second section 24.In preferred example, profile portion 242 is radial section (that is, along being perpendicular to the cross section that the radial direction B cutting of axial direction A is obtained) non-circular profile portion.In preferred example, profile portion 242 is in the most elongated plate body, and has the contact surface that lower contact surface 2421(is the most smooth), two relative generally flat sidepieces 2422 and the sidepiece 2423 of relative two circular arcs.Body 241 can be generally cylindrical.The length radially of profile portion 242 is (i.e., correspond roughly to the distance between the sidepiece 2423 of two circular arcs) more than the external diameter of body 241, and the width (that is, corresponding roughly to the distance between generally flat sidepiece 2422) radially of profile portion 242 can be more than (being such as slightly larger than), equal to or less than the external diameter of (being such as slightly lower than) body 241.In the example shown in the series of figures, the axial central part of profile portion 242 is hollow, it should be noted, however, that the axial central part of profile portion 242 can also be solid, that is, lower contact surface 2421 is totally continuous contact surface.It is pointed out here that in the first embodiment, profile portion (sun junction surface) 242 is used as the first junction surface according to the present invention.
Needle 30 generally comprises: the collar (cloudy junction surface) 32, cylinder 34 and needle body 36.It is pointed out here that in the first embodiment, needle 30 is used as the second component according to the present invention.
It is provided with receiving chamber, top 341(at the first end (upper end) place of cylinder 34 and is used as the collar receiving chamber according to the present invention), the collar 32 is arranged in receiving chamber, top 341.In preferred example, the collar 32 is fixedly connected to cylinder 34 by being interference fitted in receiving chamber, top 341.Axial center at cylinder 34 is provided with middle part and accommodates chamber 342, and receiving chamber, middle part 342 is for accommodating hereafter by parts such as the helical springs that is described.In preferred example, being provided with stage portion 343 at the internal perisporium of cylinder 34, between receiving chamber, top 341 and receiving chamber, middle part 342, stage portion 343 is conducive to the collar 32 stable position relative to cylinder 34.At the second end (lower end) place of cylinder 34, maintain needle body 36.In preferred example, the lower end at cylinder 34 be provided with general toroidal to the flange 344 protruded, needle body 36 is held in cylinder 34 by flange 344.
The collar 32 has through hole 321, and profile portion 242 is inserted into through through hole 321 but can not rotate or can not fully rotate (i.e., it is impossible to enough 360 degree of ground rotate) in through hole 321.In other words, only under predetermined circumferential angle, profile portion 242 can be inserted through through hole 321, that is, in the case of rotating at a certain angle after profile portion 242 is in axial direction downwardly into and passes through hole 321, profile portion is unable to the most back be inserted through through hole 321 by the collar 32 backstop.In preferred example, substantially matchingly with profile portion 242, through hole 321 is the non-circular through hole of radial section, making profile portion 242 and through hole 321 when profile portion 242 is inserted through through hole 321 is guiding clearance matching relationship (in other words, profile portion 242 substantially can not rotate or radially move).In preferred example, substantially matchingly with the profile portion 242 in the most elongated plate body, through hole 321 be correspondingly radial section in the most elongated through hole, and there is the generally flat internal perisporium section 3212 of relative two and the internal perisporium section 3213 of relative two circular arcs.
In one example, the collar 32 has pockets 322 at the second end (lower end in Fig. 1) place, pockets 322 is used for accommodating profile portion 242, profile portion 242 is made to be unable in axial direction move up by backstop, this second end is contrary with that end (upper end in the first end, i.e. Fig. 1) being initially inserted into by profile portion 242 of the collar 32.Preferably, pockets 322 is the radial section non-circular pockets substantially matching with profile portion 242, making the profile portion 242 when profile portion 242 is contained in pockets 322 is the relation (in other words, profile portion 242 substantially can not rotate or radially move) that small-gap suture coordinates with pockets 322.It is highly preferred that substantially matchingly with the profile portion 242 in the most elongated plate body, pockets 322 is that radial section is in the most elongated pockets.According to the present invention, owing to using the substantially matching profile portion in the most elongated plate body, radial section is in the most elongated through hole and radial section is in the most elongated pockets, the assembly or disassembly that can make needle assembly is more smooth, and make profile portion be housed stably in pockets after assembly, so that the first component of needle assembly and second component detachable is connected more stable.
It is pointed out here that in the first embodiment, the collar (cloudy junction surface) 32 is used as the second junction surface according to the present invention.
The longitudinal center line of pockets 322 can substantially overlap with the longitudinal center line of through hole 321.Through hole 321 be radial section in the most elongated through hole pockets 322 be radial section in the most elongated pockets in the case of, radial direction longitudinal axis B1 of pockets 322 along the circumferential direction offsets from each other with radial direction longitudinal axis B2 of through hole 321, preferably offsets from each other 90 degree.
In the example shown in the series of figures, needle body 36 includes: needle core 361, sealing member 362 and reinforcement 363.Needle body 36 can be retained in axial direction can move up and down relative to cylinder 34 at the lower end of cylinder 34.It is to be noted, however, that needle body 36 can also be fixedly connected to the lower end of cylinder 34.
Needle assembly 10 can also include that helical spring 40(is used as the bias component according to the present invention).Helical spring 40 is contained in the receiving chamber, middle part 342 of cylinder 34.Profile portion 242 and then the whole sleeve 20 of sleeve 20 are upwardly biased by helical spring 40 so that profile portion 242 is pressed against in such as pockets 322.It addition, needle body 36 with cylinder 34 in the case of can being connected in the way of the most in axial direction moving, helical spring 40 is also by needle body 36 biased downward.Here it is to be noted that it other suitable flexible member can be used to replace helical spring 40 to constitute bias component.
In preferred example, between profile portion 242 and helical spring 40, it is provided with pad 50.Pad 50 is conducive to helical spring 40 more smoothly to bias profile portion 242.
At needle body 36 in the case of the lower end of cylinder 34 is retained and in axial direction can move up and down relative to cylinder 34, force transfer unit 60 can be set between helical spring 40 and needle body 36.The reinforcement 363 of force transfer unit 60 and needle body 36(such as needle body 36) point cantact, thus realize needle body 36(and be specially the needle core 361 of needle body 36) relative to valve seat (not shown) from centering.In the example shown in the series of figures, force transfer unit 60 includes ball seat 62 and spheroid 64.Ball seat 62 is used for keeping spheroid 64, and spheroid 64 is for carrying out point cantact with needle body 36.
Example assembled and the unloading process of needle assembly 10 according to first embodiment of the invention are described below.When assembling, needle 30 is made to rotate to suitable circumferential angle (i.e. relative to the sleeve 20 being the most connected with the corresponding component of drive mechanism, the through hole 321 of the collar 32 making needle 30 in axial direction aligns with the profile portion 242 of the second section 24 of sleeve 20), then through hole 321 is enclosed within profile portion 242, profile portion 242 is made to be inserted through through hole 321, until profile portion 242 is inserted passes through hole 321.Then, needle 30 is made to rotate such as 90 degree together with the collar 32 so that the pockets 322 of the collar 32 of needle 30 in axial direction aligns with profile portion 242.Then, such as under the effect of the elastic force of helical spring 40, make profile portion 242 be pressed against in pockets 322, thus complete assembling.When dismounting, needle 30 is pressed upwards on together with the collar 32 so that profile portion 242 leaves pockets 322.Then, needle 30 is made to rotate such as 90 degree together with the collar 32 so that the through hole 321 of the collar 32 of needle 30 in axial direction aligns with profile portion 242.Then, pull-out needle 30 downwards, thus complete dismounting.Even if here it is to be noted that it in the case of the bias component being not provided with such as helical spring 40, it is also possible to be appropriately carried out the assembly or disassembly of needle assembly 10, and also be able to make needle assembly 10 suitably operate in the work process of electric expansion valve.
According to first embodiment of the invention, can be in the case of need not by any external tool, dismantle easily and freely by demand and replacing needle in the way of directly with hands, such that it is able to realize regulating the purpose of electronic expansion valve capacity in Single Electron expansion valve by changing the needle of different size, thus expand the range of application of electric expansion valve and strengthen versatility.
Below, with reference to Fig. 3 and Fig. 4 A-4D, the needle assembly 10A according to second embodiment of the invention is described.Wherein, Fig. 3 is the longitudinal section of the needle assembly according to second embodiment of the invention, and Fig. 4 A-4D is the axonometric chart of all parts included by needle assembly according to second embodiment of the invention.
For simplicity, the second embodiment and the difference of the first embodiment will mainly be described below.
As it is shown on figure 3, needle assembly 10A can include sleeve 20A and needle 30A.Sleeve 20A generally comprises: first/top section (internal thread part/anti-rotation feature) 22A；Second/compresses lower section (needle junction surface) 24A；And the collar (cloudy junction surface) 26A.Forming porose (such as through hole) in the first section 22A of sleeve 20A, this hole has round-shaped, and is formed with female thread in this hole.Additionally, the periphery of the first section 22A of sleeve 20A has anti-rotational structure (the most non-circular or polyhedron periphery is preferably octahedra periphery as shown in Figure 4 A).The first section 22A of sleeve 20A is for (not shown with the corresponding component of drive mechanism, lower end/the male end of the mandrel that the rotor with rotation motor of such as drive mechanism rotates integratedly) threaded, to receive power from drive mechanism such that it is able in axial direction A upper and lower translation in the case of the mandrel of drive mechanism rotates.The second section 24A of sleeve 20A is for engaging with needle 30A so that needle 30A can along with the up and down motion of sleeve 20A in axial direction A move up and down.It is pointed out here that in this second embodiment, sleeve 20A is used as the first component according to the present invention.
Lower end at the second section 24A is provided with lower containment chamber 28A(and is used as the collar receiving chamber according to the present invention), collar 26A is arranged in the 28A of lower containment chamber.In preferred example, collar 26A is fixedly connected to the second section 24A by being interference fitted in the 28A of lower containment chamber.Axial center at sleeve 20A is provided with middle part and accommodates chamber 29A, receiving chamber, middle part 29A such as accommodating the helical spring being hereafter described.In preferred example, at the internal perisporium of sleeve 20A, being provided with stage portion 243A between lower containment chamber 28A and receiving chamber, middle part 29A, stage portion 243A is conducive to collar 26A to be specially the second section 24A relative to sleeve 20A() stable position.In preferred example, at the internal perisporium of the first section 22A of sleeve 20A, it is provided with stage portion 223A, the helical spring that stage portion 223A hereafter will be described for supporting.
The structure of collar 26A is similar to the collar 32 in the first embodiment.Collar 26A has through hole 261A.In preferred example, through hole 261A is the non-circular through hole of radial section.In preferred example, through hole 261A be radial section in the most elongated through hole, and there is generally flat internal perisporium section 2612A of relative two and internal perisporium section 2613A of relative two circular arcs.In one example, collar 26A has pockets 262A, pockets 262A for accommodating the profile portion of needle 30A being hereafter described at the first end (upper end in Fig. 3) place.Preferably, pockets 262A is the non-circular pockets of radial section.It is highly preferred that pockets 262A is that radial section is in the most elongated pockets.It is pointed out here that in this second embodiment, the collar (cloudy junction surface) 26A is used as the first junction surface according to the present invention.
Needle 30A generally comprises needle body 36A.It is pointed out here that in this second embodiment, needle 30A is used as the second component according to the present invention.
Upper end at needle body 36A is provided with profile portion (sun junction surface) 365A.The structure of profile portion 365A is similar to the profile portion 242 in the first embodiment.In preferred example, profile portion 365A is the non-circular profile portion of radial section.In preferred example, profile portion 365A is in the most elongated plate body, and has the contact surface that upper contact surface 3651A(is the most smooth), two relative generally flat sidepiece 3652A and the sidepiece 3653A of relative two circular arcs.The length radially of profile portion 365A is (i.e., correspond roughly to the distance between the sidepiece 3653A of two circular arcs) external diameter of upper end more than needle body 36A, and the width (that is, corresponding roughly to the distance between generally flat sidepiece 3652A) radially of profile portion 365A can be more than (being such as slightly larger than), equal to or less than the external diameter of the upper end of (being such as slightly lower than) needle body 36A.It is pointed out here that in this second embodiment, profile portion (sun junction surface) 365A is used as the second junction surface according to the present invention.
Needle assembly 10A can also include that helical spring 40A(is used as the bias component according to the present invention).Helical spring 40A is contained in receiving chamber, the middle part 29A of sleeve 20A.
The assembly or disassembly process of the needle assembly 10A according to second embodiment of the invention is essentially similar with the needle assembly 10 assembly or disassembly process according to first embodiment of the invention.
According to second embodiment of the invention, similarly, can be in the case of need not by any external tool, dismantle easily and freely by demand and replacing needle in the way of directly with hands, such that it is able to realize regulating the purpose of electronic expansion valve capacity in Single Electron expansion valve by changing the needle of different size, thus expand the range of application of electric expansion valve and strengthen versatility.
Below, with reference to Fig. 5 and Fig. 6 A-6E, the needle assembly 10B according to third embodiment of the invention is described.Wherein, Fig. 5 is the longitudinal section of the needle assembly according to third embodiment of the invention, and Fig. 6 A-6E is the axonometric chart of all parts included by needle assembly according to third embodiment of the invention.
For simplicity, the 3rd embodiment and the difference of the first and second embodiments will mainly be described below.
As it is shown in figure 5, needle assembly 10B can include sleeve 20B and needle 30B.Sleeve 20B generally comprises: first/top section (internal thread part/anti-rotation feature) 22B；And second/compresses lower section (needle junction surface) 24B.Forming porose (such as through hole) in the first section 22B of sleeve 20B, this hole has round-shaped, and is formed with female thread in this hole.Additionally, the periphery of the first section 22B of sleeve 20B has anti-rotational structure (the most non-circular or polyhedron periphery is preferably octahedra periphery).The first section 22B of sleeve 20B is for (not shown with the corresponding component of drive mechanism, lower end/the male end of the mandrel that the rotor with rotation motor of such as drive mechanism rotates integratedly) threaded, to receive power from drive mechanism such that it is able in axial direction A upper and lower translation in the case of the mandrel of drive mechanism rotates.The second section 24B of sleeve 20B is for engaging with needle 30B so that needle 30B can along with the up and down motion of sleeve 20B in axial direction A move up and down.It is pointed out here that in the third embodiment, sleeve 20B is used as the first component according to the present invention.
Lower end at the second section 24B is provided with lower containment chamber 28B, and a part of needle 30A is arranged in the 28B of lower containment chamber.Axial center at sleeve 20B is provided with middle part and accommodates chamber 29B, receiving chamber, middle part 29B such as accommodating the helical spring being hereafter described.In preferred example, at the internal perisporium of sleeve 20B, it is provided with stage portion 25B, the helical spring that stage portion 25B hereafter will be described for supporting.
Groove 27B, groove 27B it is provided with for accommodating the back-up ring being hereafter described at the internal perisporium of the lower end of the second section 24B.It is pointed out here that in the third embodiment, groove 27B is used as the first junction surface according to the present invention.
Needle 30B generally comprises: needle core 361B, sealing member 362B and reinforcement 363B.It is pointed out here that in the third embodiment, needle 30B is used as the second component according to the present invention.
In the example shown in the series of figures, at sealing member 362B, it is formed with flange 3621B(outwardly in a radial direction is used as the abutting part according to the present invention).Here it is to be noted that it in addition to the flange the most inwardly or outwardly protruded, such as other parts/part of needle 30B can be used for and hereafter abuts the back-up ring being described to constitute the abutting part according to the present invention.Correspondingly, at reinforcement 363B, flange 3631B outwardly in a radial direction it is formed with.Flange 3621B(or flange 3621B is together with flange 3631B) for being indirectly supported by back-up ring with hereafter the back-up ring being described being abutted or abutted with grommet.It is pointed out here that in the third embodiment, flange 3621B(or flange 3621B is together with flange 3631B) it is used as the second junction surface according to the present invention.
Here it is to be noted that it in the third embodiment, needle can also be other suitable type any, such as the needle in the 3rd embodiment.In this case, can be the sidepiece 2423 of the circular arc of profile portion 365A as described in the second embodiment as the flange at the second junction surface, or can be from other suitable flange any outwardly in a radial direction for needle body 36A.
Needle assembly 10B includes that back-up ring 90B(is used as the intermediate member according to the present invention).According to the 3rd embodiment, sleeve 20B(the first component) groove 27B(the first junction surface) with needle 30B(second component) flange 3621B(the second junction surface) detachably connected by back-up ring 90B.Back-up ring 90B can include the body 901B in general toroidal and the grasping part 902B protruded from body 901B.Back-up ring 90B may be embodied as elastomeric element.Specifically, the body 901B of at least back-up ring 90B has elasticity it is thus possible to elastic deformation.Back-up ring 90B is removably disposed in groove 27B, the body 901B part making back-up ring 90B is embedded in groove 27B, another part of the body 901B of back-up ring 90B then protrudes relative to groove 27B such that it is able to the either directly or indirectly flange 3621B and then backstop whole needle 30B of backstop needle 30B.
In preferred example, grasping part 902B is formed as a pair, and the most in axial direction protrudes from the body 901B substantially radially direction of back-up ring 90B inwardly projecting (such as slightly protruding).Owing to being constructed so as to, grasping part can be avoided to interfere with other parts, the most spatially guarantee to touch grasping part easily simultaneously.By clamping this pair grasping part 902B, it is possible to make body 901B elastic deformation so that the diameter of ring body of body 901B in general toroidal diminishes the most easily to depart from from groove 27B.
In preferred example, back-up ring 90B is configured to: back-up ring 90B in the raw under, the diameter of the ring body of the body 901B of back-up ring 90B is suitably larger than the diameter of the ring body (that is, the imaginary ring body that groove 27B is formed) of (being preferably slightly larger than) groove 27B.So, when the body 901B of back-up ring 90B is contained in groove 27B, the body 901B of back-up ring 90B can apply suitable elastic force in a radially outer direction to groove 27B, so that the body 901B of back-up ring 90B is more housed stably in groove 27B, and then needle 30B is more stably assemblied in sleeve 20B.
In preferred example, needle assembly 10B also includes that grommet 95B(is used as the additional intermediate member according to the present invention).Grommet 95B can coordinate with the second section 24B small-gap suture of sleeve 20B in outside, and grommet 95B can in inner side in the way of small-gap suture cooperation around the appropriate section (this appropriate section is positioned at below flange 3621B) of needle 30B.Grommet 95B is for being arranged between the body 901B of back-up ring 90B and the flange 3621B of needle 30B, thus a part of grommet 95B (such as inside upper part) abuts with flange 3621B and a part (such as outer lower portion) of grommet 95B abuts with the body 901B of back-up ring 90B.By arranging grommet 95B, on the one hand, needle 30B abrasion can be avoided owing to cost higher needle 30B does not directly contact with back-up ring 90B and damage, on the other hand, needle 30B stable position in sleeve 20B can be improved.
Needle assembly 10B can also include that helical spring 40B(is used as the bias component according to the present invention).Helical spring 40B is contained in receiving chamber, the middle part 29B of sleeve 20B.Helical spring 40B is supported by stage portion 25B, and by needle 30B biased downward.
Example assembled and the unloading process of needle assembly 10B according to third embodiment of the invention are described below.When assembling, needle 30B is inserted in the lower containment chamber 28B of sleeve 20B.Then, in the case of being provided with grommet 95B, being inserted by grommet 95B in the lower containment chamber 28B of sleeve 20B, thus grommet 95B coordinates and in inner side around the appropriate section of needle 30B with the second section 24B small-gap suture of sleeve 20B in outside.Then, clamp the grasping part 902B of back-up ring 90B, when diminishing with the diameter at the ring body of body 901B, the body 901B of back-up ring 90B is embedded in groove 27B.Now, the part relative to groove 27B protrusion of body 901B abuts with the flange 3621B of needle 30B or abuts with grommet 95B and via grommet 95B support lug 3621B indirectly, thus completes assembling.When dismounting, directly clamp grasping part 902B with hands, when diminishing with the diameter at the ring body of body 901B, back-up ring 90B is pulled down from groove 27B.Then, needle 30B is pulled down from sleeve 20B, thus complete dismounting.In the case of being provided with helical spring 40B, time in the lower containment chamber 28B that needle 30B is inserted sleeve 20B, need the elastic force heading on helical spring 40B to push needle 30B, and after assembling completes, needle 30B bears the downward elastic force of helical spring 40B.So, the needle 30B assembling relative to sleeve 20B can more be stablized.Then, it should be noted that, even if in the case of the bias component being not provided with such as helical spring 40, it is also possible to be appropriately carried out the assembly or disassembly of needle assembly 10B, and also be able to make needle assembly 10B suitably operate in the work process of electric expansion valve.
Here it is to be noted that it in the third embodiment, following modification can be allowed.That is, groove (the most outwardly open groove) can be formed at the periphery of needle 30B, and flange (the most inwardly projecting flange) can be formed at sleeve 20B the second section 24B lower end internal perisporium at.In this modification, back-up ring can be configured to: back-up ring in the raw under, the diameter of the ring body of the body of back-up ring is suitably less than the diameter of ring body (that is, the imaginary ring body that groove is formed) of (being preferably slightly lower than) groove.So, when the body of back-up ring accommodates in the trench, back-up ring body can apply suitable elastic force in a radially inward direction to groove, so that back-up ring body is more housed stably in groove, and then needle is more stably assemblied in sleeve.In this modification, grasping part can be formed as a pair, and outwardly (such as slightly protruding) from the body of back-up ring substantially radially direction the most in axial direction protrudes.By strutting this pair grasping part, it is possible to make body elastic deformation so that the diameter of ring body of body in general toroidal becomes greatly the most easily to depart from from groove.According to this modification, equally realize freely dismantling and changing of needle assembly.
According to third embodiment of the invention and modification thereof, similarly, can be in the case of need not by any external tool, dismantle easily and freely by demand and replacing needle in the way of directly with hands, such that it is able to realize regulating the purpose of electronic expansion valve capacity in Single Electron expansion valve by changing the needle of different size, thus expand the range of application of electric expansion valve and strengthen versatility.
And, in the third embodiment, back-up ring is the so-called nonstandard or self-control or special-shaped back-up ring being such as made up of steel wire.Therefore, realize compared with " screw thread adds shoulder " scheme of axially connecting with being equally used in correlation technique, can eliminate according to dismountable (flexibility or rigidity) axially attachment structure of third embodiment of the invention loosen under vibration environment, the shortcoming such as reliability is the highest, cost is high, narrow application range.On the other hand, with being equally used in correlation technique prevent axial motion " standard back-up ring (sees Figure 14, Figure 14 is the axonometric chart illustrating the back-up ring in correlation technique) " scheme compares, dismountable axial attachment structure according to third embodiment of the invention can: in the case of such as radial space is smaller use, the certain axial nominal clearance amount existing for " standard back-up ring " scheme can be eliminated or reduce, when assembly or disassembly without using specific purpose tool thus assembly or disassembly is simpler, versatility is improved, simple in construction own, and relevant cost is reduced.Especially, back-up ring (the nonstandard back-up ring in hole) according to third embodiment of the invention and the back-up ring (the nonstandard back-up ring of axle) according to its modification, owing to non-standard de-sign can be carried out by demand as the case may be, therefore can be designed that various nonstandard back-up ring to meet practical set and space requirement, thus versatility is significantly enhanced.
According to additional aspects of the present invention, it is provided that a kind of electric expansion valve, this electric expansion valve can include drive mechanism, valve seat and needle assembly as above.In this electric expansion valve, first component (sleeve) of needle assembly can be connected with the corresponding component of drive mechanism, to receive power from drive mechanism, thus in axial direction moves up and down.Additionally, the second component (needle) detachably connected with the first component of needle assembly can in axial direction move up and down along with the up and down motion of second component thus regulate the flow of the refrigerant fluid flowing through electric expansion valve, and can engage with valve seat thus close electric expansion valve.
Below, the back-up ring according to the present invention and application thereof are further described with reference to Fig. 7, Fig. 8, Fig. 9 A-9C and Figure 10 and Fig. 5 and Fig. 6 A-6E above.Wherein, Fig. 7 is the axonometric chart of the mandrel being shown with the hole back-up ring according to the present invention and the assembly of dynamic ferrum, Fig. 8 is the longitudinal section of the mandrel being shown with the hole back-up ring according to the present invention and the assembly of dynamic ferrum, Fig. 9 A-9C is the axonometric chart of mandrel and all parts included by assembly of dynamic ferrum, and Figure 10 is the axonometric chart of the sleeve being shown with the hole back-up ring according to the present invention and the assembly of needle.
As it can be seen, back-up ring 90B can be used to detachably connected mandrel 70B(is used as male connector according to a further aspect in the invention) and dynamic ferrum 80B(as cloudy connector according to a further aspect in the invention).Specifically, the upper end in mandrel 70B be provided with the flange abutting part of the present invention (be used as according to) or with the upper end such as axial restraint of mandrel 70B the axle bush 72B(that is connected be used as the abutting part according to the present invention).It addition, the lower end at dynamic ferrum 80B is provided with lower containment chamber 82B, for accommodating the upper end of mandrel 70B.Groove 84B it is provided with at the internal perisporium of lower end.Thus, the groove 84B of back-up ring 90B, the flange of mandrel 70B or the axle bush 72B being arranged at mandrel 70B and dynamic ferrum 80B the axial stop mechanism according to the present invention is constituted.In one example, at the internal perisporium of the lower end of dynamic ferrum 80B, it is provided above stage portion 86B at groove 84B, stage portion 86B for the flange of mandrel 70B or be arranged at the axle bush 72B of mandrel 70B and abut, thus make mandrel 70B and dynamic ferrum 80B more stably assemble or can limit mandrel 70B and dynamic ferrum 80B descend the relative movement on twocouese in the axial direction.
It addition, as shown in Figure 10 and as discussed above concerning Fig. 5 etc. described, back-up ring 50B can be used to detachably connected sleeve 20B(and is used as cloudy connector according to a further aspect in the invention) and needle 30B(as male connector according to a further aspect in the invention).Thus, the flange 3621B of back-up ring 50B, the groove 27B and needle 30B of sleeve 20B another the axial stop mechanism according to the present invention is constituted.
Below, the back-up ring (hole back-up ring) according to the present invention and application thereof are further described with reference to Figure 11, Figure 12 and Figure 13 A-13C.Wherein, Figure 11 is the axonometric chart of the mandrel being shown with the shaft block ring according to the present invention and the assembly of axle bush, Figure 12 is the longitudinal section of the mandrel being shown with the shaft block ring according to the present invention and the assembly of axle bush, and Figure 13 A-13C is the axonometric chart of mandrel and all parts included by assembly of axle bush.
As it can be seen, shaft block ring 90C can be used to detachably connected mandrel 70C(is used as male connector according to a further aspect in the invention) and axle bush 72C(as cloudy connector according to a further aspect in the invention).Specifically, at the periphery of the upper end of mandrel 70C, groove 74C it is provided with.Thus, the groove 74C and axle bush 72C of back-up ring 90C, mandrel 70C another the axial stop mechanism according to the present invention is constituted.In one example, at the periphery of the upper end of dynamic ferrum 70C, below groove 74C, it is provided with stage portion 76C, stage portion 76C, for abutting with axle bush 72C, thus makes mandrel 70C and axle bush 72C more stably assemble or can limit mandrel 70C and descends the relative movement on twocouese in the axial direction with axle bush 72C.
As shown in Figure 13 B, back-up ring 90C can include that the elastic body portion 901C in general toroidal and a pair grasping part 902C, each grasping part 902C extend from the associated end in elastic body portion respectively.In preferred example, grasping part 902C stretches out from the end substantially radially direction of elastic body portion 901C and the most in axial direction extends.Owing to being constructed so as to, grasping part can be avoided to interfere with other parts, the most spatially guarantee to touch grasping part easily simultaneously.
According to additional aspects of the present invention, it is provided that a kind of electric expansion valve, this electric expansion valve can include one or more back-up ring as above or one or more axial stop mechanism.
Exemplary embodiment of the invention and modification thereof are the most specifically described, it should be appreciated to those skilled in the art that the invention is not limited in above-mentioned specific embodiment/example/modification but multiple different possible scheme can be included.
Such as, according to the first aspect of the invention, it is provided that a kind of needle assembly, including the first component, described first component is connected with the drive disk assembly of drive mechanism or integral with described drive disk assembly, and described first component receives power it is thus possible in axial direction move up and down from described drive mechanism；And second component, described second component includes needle, described second component is detachably connected with described first component, and described second component in axial direction can move up and down along with the up and down motion of described first component so that needle can engage with valve seat or separate.
According to the second aspect of the invention, in above-mentioned needle assembly, described first component has the first junction surface, and described second component has the second junction surface, and described first junction surface is detachably connected with described second junction surface.
According to the third aspect of the invention we, in above-mentioned needle assembly, described first junction surface is the one in profile portion and the collar, described second junction surface is the another one in the collar and profile portion, and the described collar has through hole, make the described profile portion when assembling can be inserted through described through hole from the first side of the described collar, but after described profile portion is inserted and passed described through hole, rotate to predetermined circumference angle described profile portion around axial direction be unable to the most back move by described collar backstop.
According to the fourth aspect of the invention, in above-mentioned needle assembly, the radial section of described profile portion is non-circular, and described through hole is the non-circular through hole substantially matching with described profile portion.
According to the fifth aspect of the invention, in above-mentioned needle assembly, described profile portion is in the most elongated plate body, and there is contact surface, two relative generally flat sidepieces and the sidepiece of two relative circular arcs, and described through hole be correspondingly radial section in the most elongated through hole, and there is two relative generally flat internal perisporium sections and the internal perisporium section of two relative circular arcs.
According to the sixth aspect of the invention, in above-mentioned needle assembly, the described collar is provided with pockets at the second side contrary with described first side, and described pockets is used for accommodating described profile portion so that described profile portion is unable to the most back move by backstop.
According to the seventh aspect of the invention, in above-mentioned needle assembly, described pockets is the non-circular pockets substantially matching with described profile portion.
According to the eighth aspect of the invention, in above-mentioned needle assembly, described pockets is that the radial section substantially matching with described profile portion is in the most elongated pockets.
According to the ninth aspect of the invention, in above-mentioned needle assembly, described through hole is that the radial section substantially matching with described profile portion is in the most elongated through hole, the longitudinal center line of described pockets substantially overlaps with the longitudinal center line of described through hole, and the radial direction longitudinal axis of the radial direction longitudinal axis of described pockets and described through hole along the circumferential direction offsets from each other.
According to the tenth aspect of the invention, in above-mentioned needle assembly, the radial direction longitudinal axis of described pockets and the radial direction longitudinal axis of described through hole along the circumferential direction offset from each other 90 degree.
According to the eleventh aspect of the invention, in above-mentioned needle assembly, described needle assembly also includes bias component, described bias component is arranged between described first component and described second component, in order to bias described first component and described second component along the direction making described first component and described second component be separated from each other.
According to the twelfth aspect of the invention, in above-mentioned needle assembly, described first junction surface is provided in the described profile portion of the lower end of described first component, described second junction surface is provided in the described collar of the upper end of described second component, and described second component also includes cylinder and is connected to the needle body of lower end of described cylinder, upper end at described cylinder is provided with the collar and accommodates chamber, and the described collar is contained in the described collar and accommodates in chamber.
According to the thirteenth aspect of the invention, in above-mentioned needle assembly, the described collar is contained in the described collar with interference fit and accommodates in chamber.
According to the fourteenth aspect of the invention, in above-mentioned needle assembly, in described cylinder, it is provided with middle part accommodates chamber, and described needle assembly also includes bias component, described bias component is contained in receiving chamber, described middle part, in order to upwards bias described profile portion so that described profile portion is against the described collar.
According to the fifteenth aspect of the invention, in above-mentioned needle assembly, described needle assembly also includes the pad being arranged between described profile portion and described bias component.
According to the sixteenth aspect of the invention, in above-mentioned needle assembly, described needle body is connected in axial direction to move up and down relative to described cylinder, and described needle assembly also includes the force transfer unit being arranged between described bias component and described needle body, described force transfer unit and described needle body point cantact, in order to realize needle relative to valve seat from centering.
According to the seventeenth aspect of the invention, in above-mentioned needle assembly, described bias component is helical spring.
According to the eighteenth aspect of the invention, in above-mentioned needle assembly, described first junction surface is provided in the described collar of the lower end of described first component, described second junction surface is provided in the described profile portion of the upper end of described second component, and described first component is sleeve, lower end at described sleeve is provided with the collar and accommodates chamber, and the described collar is contained in the described collar and accommodates in chamber.
According to the nineteenth aspect of the invention, in above-mentioned needle assembly, the described collar is contained in the described collar with interference fit and accommodates in chamber.
According to a twentieth aspect of the invention, in above-mentioned needle assembly, in described sleeve, it is provided with middle part accommodates chamber, and described needle assembly also includes bias component, described bias component is contained in receiving chamber, described middle part, in order to profile portion described in biased downward is so that described profile portion is against the described collar.
According to the twenty-first aspect of the invention, in above-mentioned needle assembly, described bias component is helical spring.
According to the twenty-second aspect of the invention, in above-mentioned needle assembly, described first junction surface is the one in groove and abutting part and the lower end being arranged on described first component, described second junction surface is the another one in abutting part and groove, and described needle assembly also includes intermediate member, described first junction surface is detachably connected by described intermediate member with described second junction surface.
According to the twenty-third aspect of the invention, in above-mentioned needle assembly, described intermediate member is circlip, described circlip is removably disposed in described groove so that a part for described circlip is set in the trench and another part of described circlip protrudes it is thus possible to abutting part described in backstop from described groove.
According to the twenty-fourth aspect of the invention, in above-mentioned needle assembly, described circlip includes the body in general toroidal and the grasping part extended from described body.
According to the twenty-fifth aspect of the invention, in above-mentioned needle assembly, described first component is sleeve, described groove at the internal perisporium of the lower end that described first junction surface is provided in described sleeve, described second junction surface is provided in the described abutting part at described second component, and described grasping part is set to a pair, and extends internally from the end substantially radially direction of described body respectively and the most in axial direction extend.
According to the twenty-sixth aspect, in above-mentioned needle assembly, described first component is sleeve, described first junction surface is provided in the described abutting part of the lower end of described sleeve, described second junction surface is provided in the described groove at described second component, and described grasping part is set to a pair, and stretches out from the end substantially radially direction of described body respectively and the most in axial direction extend.
According to the twenty-seventh aspect of the invention, in above-mentioned needle assembly, described needle assembly also includes grommet, described grommet is arranged between described circlip and described abutting part, and a part for described grommet can abut with described circlip and another part of described grommet can abut with described abutting part.
According to the twenty-eighth aspect of the invention, in above-mentioned needle assembly, described abutting part is flange outwardly in a radial direction or the most inwardly projecting flange.
According to the twenty-ninth aspect, it is provided that a kind of electric expansion valve, including drive mechanism；Valve seat；And as above needle assembly.
According to the thirtieth aspect of the invention, in above-mentioned electric expansion valve, described drive mechanism is electromagnetic driving mechanism, and described electromagnetic driving mechanism includes solenoid and is used as the plunger of described drive disk assembly.
According to the thirty-first aspect of the invention, in above-mentioned electric expansion valve, described drive mechanism is electrodynamic type drive mechanism, and described electrodynamic type drive mechanism includes motor and mandrel, described mandrel configurations becomes the rotor with described motor to rotate integratedly, and described mandrel is used as described drive disk assembly.
According to the thirty-second aspect of the invention, in above-mentioned electric expansion valve, described first component is permanently connected with described mandrel or threadeds in screw-driven mode.
The 33rd aspect according to the present invention, in above-mentioned electric expansion valve, described first component is sleeve, and described sleeve is provided with anti-rotational structure at periphery, and being provided with internal thread part in described sleeve, described internal thread part is threadeded with the male end of described mandrel.
In present specification, directional terminology " on ", D score, " top " and " lower section " etc. use only merely for being easy to the purpose that describes, and be not construed as restrictive.
In a word, although literary composition has described in detail the present invention it should be appreciated that the invention is not limited in the detailed description of the invention/example/modification describing in detail in literary composition and illustrating.Further modification and variant can be realized without departing from the spirit and scope of the present invention by those skilled in the art.All these modification and variant are within the scope of the present invention.It addition, all component/parts described here can be replaced by the component/parts of other technical upper equivalent.
Claims (31)
1. a needle assembly (10,10A), including:
First component (20,20A), described first component is connected with the drive disk assembly of drive mechanism or integral with described drive disk assembly, and described first component receives power from described drive mechanism it is thus possible in axial direction (A) moves up and down；And
Second component (30,30A), described second component includes needle, described second component is detachably connected with described first component, described second component can along with the up and down motion of described first component in axial direction (A) move up and down, make needle can engage with valve seat or separate
Wherein, described first component (20,20A) has the first junction surface (242,26A), described second component (30,30A) has the second junction surface (32,365A), described first junction surface is detachably connected with described second junction surface
Described first junction surface (242,26A) it is the one in profile portion (242) and the collar (26A), described second junction surface (32,365A) is the another one in the collar (32) and profile portion (365A), and
The described collar (32,26A) there is through hole (321,261A), make the described profile portion (242 when assembling, 365A) described through hole can be inserted through from the first side of the described collar, but after described profile portion is inserted and passed described through hole, rotate to predetermined circumference angle described profile portion around axial direction (A) be unable in axial direction (A) by described collar backstop and back move.
Needle assembly (10,10A) the most according to claim 1, wherein, described profile portion (242, radial section 365A) is non-circular, and described through hole (321,261A) is the non-circular through hole substantially matching with described profile portion.
Needle assembly (10,10A) the most according to claim 2, wherein
Described profile portion (242,365A) in the most elongated plate body, and there is contact surface (2421,3651A), two relative generally flat sidepieces (2422,3652A) and the sidepiece (2423 of two relative circular arcs, 3653A), and
Described through hole (321, it is 261A) correspondingly that radial section is in the most elongated through hole, and there is two relative generally flat internal perisporium sections (3212,2612A) and the internal perisporium section (3213,2613A) of two relative circular arcs.
Needle assembly (10 the most according to claim 1,10A), wherein, the described collar (32,26A) being provided with pockets (322,262A) at the second side contrary with described first side, described pockets is used for accommodating described profile portion (242,365A) so that described profile portion is unable in axial direction (A) by backstop and back moves.
Needle assembly (10,10A) the most according to claim 4, wherein, described pockets (322,262A) is the non-circular pockets substantially matching with described profile portion (242,365A).
Needle assembly (10,10A) the most according to claim 5, wherein, described pockets (322,262A) is that the radial section substantially matching with described profile portion (242,365A) is in the most elongated pockets.
Needle assembly (10,10A) the most according to claim 6, wherein
Described through hole (321,261A) be the radial section substantially matching with described profile portion (242,365A) in the most elongated through hole,
The longitudinal center line of described pockets (322,262A) substantially overlaps with the longitudinal center line of described through hole (321,261A), and
The radial direction longitudinal axis (B1) of described pockets along the circumferential direction offsets from each other with the radial direction longitudinal axis (B2) of described through hole.
Needle assembly (10,10A) the most according to claim 7, wherein, the radial direction longitudinal axis (B1) of described pockets and the radial direction longitudinal axis (B2) of described through hole along the circumferential direction offset from each other 90 degree.
Needle assembly (10,10A, 10B) the most according to claim 1, wherein, described needle assembly also includes bias component (40,40A, 40B), described bias component is arranged on described first component (20,20A, 20B) and described second component (30,30A, between 30B), in order to bias described first component and described second component along the direction making described first component and described second component be separated from each other.
Needle assembly (10) the most according to claim 1, wherein
Described first junction surface (242) is provided in the described profile portion (242) of the lower end of described first component (20),
Described second junction surface (32) is provided in the described collar (32) of the upper end of described second component (30), and
Described second component also includes cylinder (34) and is connected to the needle body (36) of lower end of described cylinder, upper end at described cylinder is provided with the collar and accommodates chamber (341), and the described collar is contained in the described collar and accommodates in chamber.
11. needle assemblies (10) according to claim 10, wherein, the described collar (32) is contained in the described collar with interference fit and accommodates in chamber (341).
12. needle assemblies (10) according to claim 10, wherein
In described cylinder (34), it is provided with middle part accommodates chamber (342), and
Described needle assembly also includes bias component (40), and described bias component is contained in receiving chamber, described middle part, in order to upwards bias described profile portion (242) so that described profile portion is against the described collar (32).
13. needle assemblies (10) according to claim 12, wherein, described needle assembly also includes the pad (50) being arranged between described profile portion (242) and described bias component (40).
14. needle assemblies (10) according to claim 12, wherein
Described needle body (36) is connected to move up and down relative to described cylinder (34) in axial direction (A), and
Described needle assembly also includes the force transfer unit (60) being arranged between described bias component (40) and described needle body, described force transfer unit and described needle body point cantact, in order to realize needle relative to valve seat from centering.
15. needle assemblies (10) according to claim 12, wherein, described bias component (40) is helical spring (40).
16. needle assemblies (10A) according to claim 1, wherein
Described first junction surface (26A) is provided in the described collar (26A) of the lower end of described first component (20A),
Described second junction surface (365A) is provided in the described profile portion (365A) of the upper end of described second component (30A), and
Described first component is sleeve (20A), and the lower end at described sleeve is provided with the collar and accommodates chamber (28A), and the described collar is contained in the described collar and accommodates in chamber.
17. needle assemblies (10A) according to claim 16, wherein, the described collar (26A) is contained in the described collar with interference fit and accommodates in chamber (28A).
18. needle assemblies (10A) according to claim 16, wherein
In described sleeve (20A), it is provided with middle part accommodates chamber (29A), and
Described needle assembly also includes bias component (40A), and described bias component is contained in receiving chamber, described middle part, in order to profile portion described in biased downward (365A) is so that described profile portion is against the described collar (26A).
19. needle assemblies (10A) according to claim 18, wherein, described bias component (40A) is helical spring (40A).
20. 1 kinds of needle assemblies (10B), including:
First component (20B), described first component is connected with the drive disk assembly of drive mechanism or integral with described drive disk assembly, and described first component receives power from described drive mechanism it is thus possible in axial direction (A) moves up and down；And
Second component (30B), described second component includes needle, described second component is detachably connected with described first component, described second component can along with the up and down motion of described first component in axial direction (A) move up and down, make needle can engage with valve seat or separate
Wherein, described first component (20B) has the first junction surface (27B), described second component (30B) has the second junction surface (3621B), and described first junction surface is detachably connected with described second junction surface
Described first junction surface (27B) is the one in groove (27B) and abutting part and the lower end being arranged on described first component (20B),
Described second junction surface (3621B) is the another one in abutting part (3621B) and groove, and
Described needle assembly also includes intermediate member (90B), and described first junction surface is detachably connected by described intermediate member with described second junction surface.
21. needle assemblies (10B) according to claim 20, wherein, described intermediate member (90B) is circlip (90B), described circlip is removably disposed in described groove (27B) so that a part for described circlip is set in the trench and another part of described circlip protrudes it is thus possible to abutting part described in backstop (3621B) from described groove.
22. needle assemblies (10B) according to claim 21, wherein, described circlip includes the body (901B) in general toroidal and the grasping part (902B) extended from described body.
23. needle assemblies (10B) according to claim 22, wherein
Described first component (20B) is sleeve (20B), the described groove (27B) at the internal perisporium of the lower end that described first junction surface (27B) is provided in described sleeve,
Described second junction surface (3621B) is provided in the described abutting part (3621B) at described second component (30B) place, and
(902B) is set to a pair in described grasping part, and extend internally the most in axial direction from the end substantially radially direction of described body (901B) respectively (A) extends.
24. needle assemblies (10B) according to claim 22, wherein
Described first component (20B) is sleeve (20B), and described first junction surface is provided in the described abutting part of the lower end of described sleeve,
Described second junction surface is provided in the described groove at described second component, and
Described grasping part is set to a pair, and stretch out the most in axial direction from the end substantially radially direction of described body respectively (A) extends.
25. needle assemblies (10B) according to claim 21, wherein, described needle assembly also includes grommet (95B), described grommet is arranged between described circlip (90B) and described abutting part (3621B), and a part for described grommet can abut with described circlip and another part of described grommet can abut with described abutting part.
26. needle assemblies (10B) according to claim 20, wherein, described abutting part is flange (3621B) outwardly in a radial direction or the most inwardly projecting flange.
27. 1 kinds of electric expansion valves, including:
Drive mechanism；
Valve seat；And
Needle assembly (10,10A, 10B) as according to any one of claim 1 to 26.
28. electric expansion valves according to claim 27, wherein, described drive mechanism is electromagnetic driving mechanism, and described electromagnetic driving mechanism includes solenoid and is used as the plunger of described drive disk assembly.
29. electric expansion valves according to claim 27, wherein, described drive mechanism is electrodynamic type drive mechanism, and described electrodynamic type drive mechanism includes motor and mandrel, described mandrel configurations becomes the rotor with described motor to rotate integratedly, and described mandrel is used as described drive disk assembly.
30. electric expansion valves according to claim 29, wherein, described first component (20,20A, 20B) is permanently connected with described mandrel or threadeds in screw-driven mode.
31. electric expansion valves according to claim 30, wherein, described first component (20,20A, 20B) it is sleeve (20,20A, 20B), described sleeve is provided with anti-rotational structure at periphery, and is provided with internal thread part in described sleeve, and described internal thread part is threadeded with the male end of described mandrel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310007329.6A CN103912689B (en) | 2013-01-08 | 2013-01-08 | Valve needle assembly and electronic expansion valve comprising same |
| PCT/CN2013/088058 WO2014107998A1 (en) | 2013-01-08 | 2013-11-28 | Valve needle assembly and electronic expansion valve comprising same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310007329.6A CN103912689B (en) | 2013-01-08 | 2013-01-08 | Valve needle assembly and electronic expansion valve comprising same |
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| Publication Number | Publication Date |
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| CN103912689A CN103912689A (en) | 2014-07-09 |
| CN103912689B true CN103912689B (en) | 2016-08-03 |
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| CN201310007329.6A Active CN103912689B (en) | 2013-01-08 | 2013-01-08 | Valve needle assembly and electronic expansion valve comprising same |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108361386A (en) * | 2017-01-26 | 2018-08-03 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| WO2018137636A1 (en) | 2017-01-26 | 2018-08-02 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| DE102020124870A1 (en) * | 2019-12-04 | 2021-06-10 | ECO Holding 1 GmbH | Expansion valve |
| CN114352750B (en) * | 2022-01-26 | 2023-12-12 | 广东威灵电机制造有限公司 | Valve needle assembly, electronic expansion valve and refrigeration equipment |
| CN118640608B (en) * | 2024-08-16 | 2024-11-08 | 海力达汽车科技有限公司 | Electronic expansion valve |
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| CN103912689A (en) | 2014-07-09 |
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