CN101135504A - Refrigerating cycle device - Google Patents
Refrigerating cycle device Download PDFInfo
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- CN101135504A CN101135504A CNA2006101286073A CN200610128607A CN101135504A CN 101135504 A CN101135504 A CN 101135504A CN A2006101286073 A CNA2006101286073 A CN A2006101286073A CN 200610128607 A CN200610128607 A CN 200610128607A CN 101135504 A CN101135504 A CN 101135504A
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Abstract
The invention provides a refrigerating circulating apparatus. It includes a heat circulating closed loop, the said heat circulating closed loop includes a main compressor, heat releasing and exchanging device, expansion mechanism and heat absorption and heat exchanger, expander/compressor unit and switching device, and refrigerating working medium circulate flows in heat circulation closed loop. First flow circuit is composed of the main compressor, heat releasing exchanger, expander/compressor unit and heat adsorption exchanger, secondary flow circuit is composed of the main compressor, heat releasing exchanger, expanding mechanism, expander/compressor unit and heat adsorption exchanger. According the refrigerating circulating device of the invention, switching between the first flow circuit and the secondary flow circuit realizes through the switching device i.e. the switching between the function of expander / compressor unit.
Description
Technical field
The present invention relates to a kind of refrigerating circulatory device, the refrigerating circulatory device of a kind of volume-variable of saying so more specifically.
Background technology
Carbon dioxide is that good (GWP=1, ODP=0), economic, safe natural refrigeration working medium, and its physical property also is well suited for being applied to refrigeration system to a kind of environmental performance.Yet CO
2The coefficient of performance of air-conditioning system (COP) is lower than the synthetic refrigeration working medium that adopts usually at present.Consider CO
2During decompressional expansion, have expansion ratio little (2～4), the characteristics of recyclable merit big (account for compressor wasted work 25%～30%), so the technology that can adopt decompressor to reclaim expansion work improves systematic function, as depicted in figs. 1 and 2, recyclable expansion work: W
Rec=h3-h5.
The refrigerating circulatory device of prior art as shown in Figure 2, comprises main compressor 50, heat release heat exchanger 47, expansion mechanism 48, heat absorption heat exchanger 49.
Summary of the invention
The air conditioner refrigerating EGR of prior art though can satisfy most of demand of user, also exists some problems.For example, the atmospheric environment temperature can become very high or very low in certain specific period, the air conditioner refrigerating EGR of prior art will be difficult to satisfy the demand that the user wishes to reach as early as possible temperature desired because heat supply or refrigeration capacity are big inadequately under the situation of this peak load.On the other hand, the air conditioner refrigerating EGR of prior art, even frequency-changeable compressor system (30Hz-120Hz), its capacity variable range also is limited, and iff increasing power system capacity for the peak load that satisfies this short period, then can increase the system equipment cost greatly, cause uneconomical.Therefore, the refrigerating circulatory device of prior art is difficult to satisfy user's peak load demand under the condition of less expensive.
The purpose of this invention is to provide a kind of varying capacity refrigerating circulatory device.According to refrigerating circulatory device of the present invention, can less expensive ground satisfies the demand of user under peak load with simple relatively structure.
Refrigerating circulatory device provided by the invention, it is used for circularly cooling working medium, comprise a kind of refrigeration cycle loop, this kind of refrigeration cycle loop comprises main compressor, heat release heat exchanger, expansion mechanism and heat absorption heat exchanger, it is characterized in that described thermal cycle loop also comprises decompressor/compressor unit and switching device shifter; And constitute first stream by described main compressor, described heat release heat exchanger, described decompressor/compressor unit and described heat absorption heat exchanger; Constitute second stream by described main compressor, described heat release heat exchanger, described expansion mechanism, described decompressor/compressor unit and described heat absorption heat exchanger; Described switching device shifter is used to make refrigeration working medium to switch between first stream and second stream.
According to refrigerating circulatory device of the present invention, owing to can between first stream and second stream, switch by switching device shifter, make decompressor/compressor unit between as decompressor in first stream and situation, to switch as the compressor in second stream, thereby in second stream owing to can and can increase the heat supply or the refrigeration capacity of system, to satisfy the demand of peak hours with a plurality of compression devices.
In refrigerating circulatory device of the present invention, described refrigeration working medium can be carbon dioxide.But be not limited to this, so long as the normally used refrigeration working medium of present technique field institute is just passable.
Refrigerating circulatory device of the present invention, wherein said decompressor/compressor unit can be connected by axle with described main compressor.
Refrigerating circulatory device of the present invention, wherein said decompressor/compressor unit can be electrically connected by between current transformer and the described main compressor.
Because aforesaid decompressor/compressor unit links by axle or by current transformer and main compressor, can reclaim the expansion work of the high-pressure fluid of first stream of flowing through, and pass to main compressor, so can realize the more high efficiency operation of system.
Refrigerating circulatory device of the present invention, wherein said decompressor/compressor unit can comprise cylinder, first communicating pipe and second communicating pipe; This cylinder comprises first cylinder, second cylinder and be connected two runner pipes between the cylinder body for refrigeration working medium is circulated between described first cylinder and described second cylinder; Described first cylinder is connected with the end of described first communicating pipe; Described second cylinder is connected with the end of described second communicating pipe.
Refrigerating circulatory device of the present invention, wherein said switching device shifter can comprise second triple valve that first triple valve that is connected with the other end of described first communicating pipe is connected with the other end with described second communicating pipe.
Refrigerating circulatory device of the present invention, wherein said decompressor/compressor unit can comprise the working chamber that is formed by the single-stage cylinder, and first communicating pipe that is connected with this working chamber, second communicating pipe, third connecting pipe and the 4th communicating pipe.
Refrigerating circulatory device of the present invention, described switching device shifter can comprise, first switch valve and the 3rd switch valve that are formed on described first stream and are connected respectively with an other end of described first communicating pipe and described third connecting pipe, and the second switch valve and the 4th switch valve that are formed on described second stream and are connected respectively with the other end of described second communicating pipe and described the 4th communicating pipe.
Refrigerating circulatory device of the present invention, can for, in described first stream, refrigeration working medium flow to the entrance side of described heat absorption heat exchanger successively through described main compressor, described heat release heat exchanger, described decompressor/compressor unit from the outlet side of described heat absorption heat exchanger; In described second stream, refrigeration working medium is from the outlet side of described heat absorption heat exchanger, behind the stream arranged side by side through described main compressor and described decompressor/compressor unit, flow to the entrance side of described heat absorption heat exchanger successively through described heat release heat exchanger, described expansion mechanism.
The refrigerating circulatory device of machine according to the present invention, can between first stream and second stream, switch by switching device shifter, make decompressor/compressor unit between as decompressor in first stream and situation, to switch as the compressor in second stream.When decompressor/compressor unit in second stream during as compressor operating can with the parallel running of main compressor, refrigeration working medium circulation in the common drive system, thereby can increase the heat supply or the refrigerating capacity of system, so the peak load of system can satisfy heat supply and cooling condition the time.
In addition, when the decompressor/compressor unit in the refrigerating circulatory device of the present invention also is connected with described main compressor by axle or current transformer, in first stream, can also reclaim the expansion work of high-pressure fluid, thereby system is moved under high efficiency mode as the decompressor/compressor unit of expansion mechanism work.
Description of drawings
Fig. 1 is the CO that possesses decompressor in the prior art and do not possess decompressor
2The T of refrigerating circulatory device
-sFigure.
Fig. 2 is the CO of explanation prior art
2Stride the schematic diagram of the refrigerating circulatory device of critical cycle band decompressor.
Fig. 3 is the schematic diagram of first stream (moving under the high efficiency mode) of the varying capacity refrigerating circulatory device of first embodiment of the present invention.
Fig. 4 is the schematic diagram of second stream (operation down of big capacity model) of the varying capacity refrigerating circulatory device of first embodiment of the present invention.
Fig. 5 is the longitudinal section that is used for the twin-stage rotor-type expander/compressor unit of first embodiment of the present invention.
Fig. 6 is the schematic diagram of the varying capacity refrigerating circulatory device of second embodiment of the present invention.
Fig. 7 is the schematic diagram of first stream (moving under the high efficiency mode) of the varying capacity refrigerating circulatory device of the 3rd embodiment of the present invention.
Fig. 8 is the schematic diagram of second stream (operation down of big capacity model) of the varying capacity refrigerating circulatory device of the 3rd embodiment of the present invention.
Fig. 9 is single-stage swing-rotor type decompressor/compressor unit of being used for third embodiment of the invention longitudinal section when being connected with main compressor is coaxial.
Figure 10 is the cross-sectional view that is used for the single-stage swing-rotor type decompressor/compressor unit of third embodiment of the invention.
Figure 11 is single-stage rolling rotor-type expander/compressor unit of being used for third embodiment of the invention longitudinal section when being connected with main compressor is coaxial.
Figure 12 is the cross-sectional view that is used for the single-stage rolling rotor-type expander/compressor unit of third embodiment of the invention.
Figure 13 is decompressor/compressor unit of being used for third embodiment of the invention longitudinal section when being connected by mandrel connector with main compressor.
Figure 14 is the heating or the refrigeration performance comparison diagram of varying capacity refrigerating circulatory device under different operation moulds.
Figure 15 is the heating of varying capacity refrigerating circulatory device under different operation moulds or the comparison diagram of refrigerating capacity.
The specific embodiment
Below with reference to accompanying drawings, the specific embodiment of the present invention is elaborated.
First embodiment
Followingly varying capacity refrigerating circulatory device in the first embodiment of the invention is described with reference to Fig. 3～Fig. 5.
As shown in Figure 3 and Figure 4, refrigerating circulatory device of the present invention comprises a kind of refrigeration cycle loop, this kind of refrigeration cycle loop comprises main compressor 50, heat release heat exchanger 47, expansion mechanism 48, heat absorption heat exchanger 49, decompressor/compressor unit 51, current transformer 52, triple valve 54,55 (switching device shifter) connects by pipeline between them.Refrigeration working medium CO
2In above-mentioned thermal cycle loop, circulate.
As shown in Figure 3, constitute first stream by main compressor 50, heat release heat exchanger 47, decompressor/compressor unit 51 and heat absorption heat exchanger 49.Shown in the direction of arrow among Fig. 3, in this first stream, refrigeration working medium CO
2Flow to the entrance side of heat absorption heat exchanger 49 successively through main compressor 50, heat release heat exchanger 47, decompressor/compressor unit 51 from the outlet side of heat absorption heat exchanger 49.
As shown in Figure 4, constitute second stream by main compressor 50, heat release heat exchanger 47, expansion mechanism 48, decompressor/compressor unit 51 and heat absorption heat exchanger 49.Shown in the direction of arrow among Fig. 4, in this second stream, refrigeration working medium CO
2Flow to the entrance side of heat absorption heat exchanger 49 successively through the stream arranged side by side of main compressor 50 and decompressor/compressor unit 51, heat release heat exchanger 47, expansion mechanism 48 from the outlet side of heat absorption heat exchanger 49.
As switching device shifter, triple valve 54,55 is used to make refrigeration working medium to switch between above-mentioned first stream and above-mentioned second stream.
Heat release heat exchanger 47 and heat absorption heat exchanger 49 can adopt gas or liquid as a secondary fluid.In heat release heat exchanger 47, refrigeration working medium thermotropism remittance heat release.In heat absorption heat exchanger 49, refrigeration working medium absorbs heat from thermal source.
The air entry of main compressor 50 is connected with the outlet of heat absorption heat exchanger 49, and its exhaust outlet is connected with the inlet of heat release heat exchanger 47.First mouthful 40 (first communicating pipe) of decompressor/compressor unit 51 links to each other with triple valve 55, and its second mouthful of 4l (second communicating pipe) links to each other with triple valve 54.Other of triple valve 55 joins with the import and the outlet of heat release heat exchanger 47 respectively for two mouthfuls.Other of triple valve 54 joins with the import and the outlet of heat absorption heat exchanger 49 respectively for two mouthfuls.
As shown in Figure 5, decompressor/compressor unit 51 is a kind of fluid machineries, comprises the decompressor/compressor means 7 that is sealed in the cylindrical shell 1 and generator-motor 2 etc.
Generator-motor 2 comprises stator 4 and rotor 3 etc., and vertically is placed in the housing 1.Stator 4 is fixed on the housing 1.Rotor 3 places stator 4 inside.Main shaft 23 passes rotor 3 successively, fore bearing 13, decompressor/compressor means 7, rear bearing 18 and oil pump 8.Lubricating oil is stored in the oil sump 6, and is lubricated by petroleum pipeline 22 supply decompressor/compressor means 7 by oil pump 8 drivings.
Decompressor/compressor means 7 adopts twin-stage rotator type displacement fluid mechanism, comprises two cylinders 9,63, drive end bearing bracket 11, rear end cap 16,43,45 and two eccentric rotors 42,44 of two-piston etc.Be formed at the diameter of the diameter of two eccentric rotors 42,44 on the main shaft 23 greater than main shaft 23, its center can be determined according to design parameter to the eccentric throw at main shaft 23 centers.The outer peripheral face of piston 43,45 in the running just can be respectively and the inner peripheral surface sliding-contact of cylinder 63,9.The internal diameter of two-piston 43,45 is slightly larger than the external diameter of two eccentric rotors 42,44 respectively, is beneficial to both assemblings.The end face of cylinder 9,63 is sealed by drive end bearing bracket 11, dividing plate 39 and rear end cap 16 respectively, and forms working chamber respectively in inside, and wherein cylinder 63 is first cylinder, and cylinder 9 is second cylinder.Between the two-step mechanism cylinder 9,63 of decompressor/compressor means 7 by being connected communicating pipe 46.Decompressor/compressor means 7 is carried out the circulation of refrigeration working medium by first mouthful 40 (first communicating pipe) and second mouthful 41 (second communicating pipe) and other parts of system.The end of first communicating pipe 40 is connected with first cylinder 63, and the end of second communicating pipe 41 is connected with second cylinder 9.The other end of first communicating pipe 40 is connected with triple valve 55 (first triple valve), the other end of second communicating pipe 41 be connected with triple valve 54 (second triple valve) (seeing Fig. 3, Fig. 4).
The principal character of first embodiment of the present invention is, by the switching of two triple valves 54,55, can switch decompressor/compressor unit 51, and it is used as decompressor or as compressor.
Below in conjunction with Fig. 3～Fig. 5 the operation of refrigerating circulatory device is described.Main compressor 50 starts by motor 62, and drive refrigeration working medium and in above-mentioned kind of refrigeration cycle loop, circulate, thus the circulation of operation steam compression type refrigeration.Under the conventional load condition, decompressor/compressor unit 51 moves as decompressor, triple valve 54 is switched to and makes decompressor/compressor unit 51 be communicated with and not be communicated with main compressor 50 with the outlet of heat absorption heat exchanger 49, triple valve 55 is switched to and makes decompressor/compressor unit 51 be communicated with and not be communicated with main compressor 50 with the outlet of heat release heat exchanger 47, thereby refrigerating circulatory device operates in (first stream) under the high efficiency mode, as shown in Figure 3.
In above-mentioned first stream, refrigeration working medium is discharged into heat release heat exchanger 47 after main compressor 50 compressions, thermotropism remittance heat release in heat release heat exchanger 47 then.Then refrigeration working medium flows into decompressor/compressor unit 51 by triple valve 55 and by first mouthful 40, and this moment, expansion mechanism 48 was closed, and decompressor/compressor unit 51 is used as decompressor and uses.The high pressure refrigeration working medium is expanded by cylinder 63,9, eccentric rotor 42,44, runner pipe 46 etc. in decompressor/compressor unit 51, after expanding thus, refrigeration working medium reduces to the low pressure two phase flow, through second mouthful of 41 outflow decompressor/compressor unit 51, enter heat absorption heat exchanger 49 by triple valve 54 then.Refrigeration working medium the heat absorption heat exchanger 49 in from absorbing heat the thermal source on every side.Low-pressure fluid flows out heat absorption heat exchanger 49 and is inhaled into main compressor 50 then.Thereby finish a contrary Carnot cycle.In addition, in decompressor/compressor unit 51, carry out in the gas expansion, thereby the interior rotation energy drive shaft 23 that can be converted into of the high-pressure fluid that expands is rotated, after generator-motor 2 is converted to electric energy, by current transformer 52 this rotation can be passed to main compressor 50, realize the recycling of expansion work.
When detecting indoor temperature, device temperature sensor (not shown) becomes when being in outside a certain pre-set threshold, can judge that this moment, refrigerating circulatory device operated under the peak load, the signal of telecommunication according to control device (not shown), triple valve 54,55 can be automatically switched to opposite side, promptly, make decompressor/compressor unit 51 be communicated with main compressor 50, this moment, decompressor/compressor unit 51 was as compressor operating, thereby system moves (second stream) according to big capacity model, as shown in Figure 4.
In above-mentioned second stream, main compressor 50 carries out the compression of refrigeration working medium with decompressor/compressor unit 51 paired runnings, the refrigeration working medium of discharging from decompressor/compressor unit 51 is combined into one the tunnel through triple valve 55 and the refrigeration working medium of discharging from main compressor 50, flows into heat release heat exchanger 47 again.Refrigeration working medium thermotropism remittance heat release in heat release heat exchanger 47 then.Because triple valve 55,54 is switched, so the outlet of heat release heat exchanger 47 is not communicated with decompressor/compressor unit 51, and only be communicated with, so the inflow of the refrigeration working medium after heat release expansion mechanism 48 with expansion mechanism 48.The high pressure refrigeration working medium flows into heat absorption heat exchanger 49 after the throttling step-down is two-phase fluid in expansion mechanism 48, and from thermal source after the heat absorption, be divided into two-way: the one tunnel is inhaled into main compressor 50 to refrigeration working medium in heat absorption heat exchanger 49; Another road is inhaled into decompressor/compressor unit 51 through triple valve 55.Finish whole kind of refrigeration cycle thus.Because in this second stream, be equivalent to have two compressors to work simultaneously and drive refrigeration working medium and in above-mentioned thermal cycle loop, move, therefore can accelerate the circulation rate of refrigeration working medium, realize the increase of refrigerating capacity, thus the big load can satisfy the peak time.
As implied above, first embodiment of the invention, the varying capacity refrigerating circulatory device can be implemented between first stream and second stream by triple valve 55,54 and switch and the switching of the function of decompressor/compressor unit 51, both satisfied the high-efficiency operation pattern needs of user when conventional load, can satisfy the needs of user again in the high-volume run pattern of peak hours.In first stream, also can utilize decompressor/compressor unit 51 to reclaim expansion work, thereby further effectively improve the operational efficiency of refrigerating circulatory device simultaneously.
Second embodiment
Fig. 6 is the schematic diagram of the varying capacity refrigerating circulatory device of second embodiment of the present invention.The varying capacity refrigerating circulatory device 60 of second embodiment of the present invention and first embodiment is basic identical, as shown in Figure 6, its difference is, adopts two cover decompressor/ compressor units 51,57 in the system of present embodiment, and two pairs of triple valves 55,54 are arranged; 56,58 decompressor/ compressor unit 51,57 both sides that are placed in.The electric energy that decompressor/ compressor unit 51,57 reclaims can be sent in the motor 62 of main compressor 50 by current transformer 52,59.During operation, can distinguish and switch two decompressor/ compressor units 51,57 separately, also can switch them simultaneously.Thereby the refrigerating circulatory device that can make present embodiment can be realized 1 compressor and 2 or 3 situations that decompressor is worked simultaneously, perhaps 2 or 3 compressors and 2 or 1 situations that compressor is worked simultaneously.Correspondingly, the operation stream of the refrigeration working medium in the refrigerating circulatory device of present embodiment also has multiple, can satisfy the operation demand of refrigerating circulatory device under multi-state more.
Obviously according to the principle of the invention, can also in the varying capacity refrigerating circulatory device, adopt a plurality of decompressor/compressor units.
As implied above, second embodiment of the invention, the varying capacity refrigerating circulatory device can pass through triple valve 55,54; 56,58 and be implemented in the switching of the function of switching between first stream and second stream and decompressor/ compressor unit 51,57, the high-efficiency operation pattern needs of user when conventional load had both been satisfied, the needs of user can be satisfied again, the operation demand of cold EGR under multi-state more can also be satisfied in the high-volume run pattern of peak hours.In first stream, also can utilize decompressor/ compressor unit 51,57 to reclaim expansion work, thereby further effectively improve the operational efficiency of refrigerating circulatory device simultaneously.
The 3rd embodiment
Below, describe the refrigerating circulatory device of the 3rd embodiment of the present invention in detail with reference to Fig. 7～Figure 12.Fig. 7 is the schematic diagram of first stream (moving under the high efficiency mode) of the varying capacity refrigerating circulatory device of the 3rd embodiment of the present invention.Fig. 8 is the schematic diagram of second stream (operation down of big capacity model) of the varying capacity refrigerating circulatory device of the 3rd embodiment of the present invention.
The 3rd embodiment of the present invention as shown in Figure 7, adopts four switch valves 65,66,67,68 to replace two triple valves 55,54 in first embodiment, thereby realizes the switching of the operational mode of varying capacity refrigerating circulatory device.In addition, in the present embodiment, decompressor/compressor unit 31 and main compressor 70 are connected by axle, are enclosed in jointly in the housing 1, as shown in Figure 9 then.
As shown in Figure 7 and Figure 8, the refrigerating circulatory device of present embodiment comprises a kind of refrigeration cycle loop, this kind of refrigeration cycle loop comprises, main compressor 70, decompressor/compressor unit 31, heat release heat exchanger 47, heat absorption heat exchanger 49,48, four switch valves of expansion mechanism, 65,66,67,68 (switching device shifters) connect by pipeline between them.Wherein, decompressor/compressor unit 31 and main compressor 70 and motor 62 are connected (can shared main shaft, perhaps by the mandrel connector A among Figure 13 described as follows its main shaft is linked together) by axle, are enclosed in jointly in the housing 1 then.Refrigeration working medium CO
2In above-mentioned thermal cycle loop, circulate.
As shown in Figure 7, constitute first stream by main compressor 70, heat release heat exchanger 47, decompressor/compressor unit 31 and heat absorption heat exchanger 49.Shown in the direction of arrow among Fig. 7, in this first stream, refrigeration working medium CO
2Flow to the entrance side of heat absorption heat exchanger 49 successively through the outlet 34 of the inlet 28 of main compressor 70, main compressor 70, main compressor 70, heat release heat exchanger 47, switch valve 65, decompressor/compressor unit 31, switch valve 68 from the outlet side of heat absorption heat exchanger 49.
As shown in Figure 8, constitute second stream by main compressor 70, heat release heat exchanger 47, expansion mechanism 48, decompressor/compressor unit 31 and heat absorption heat exchanger 49.Shown in the direction of arrow among Fig. 8, in this second stream, refrigeration working medium CO
2Flow to the entrance side of heat absorption heat exchanger 49 successively through the stream arranged side by side of main compressor 70 and decompressor/compressor unit 31, heat release heat exchanger 47, expansion mechanism 48 from the outlet side of heat absorption heat exchanger 49.
As switching device shifter, four switch valves 65～68 are used to make refrigeration working medium to switch between above-mentioned first stream and above-mentioned second stream.
Heat release heat exchanger 47 and heat absorption heat exchanger 49 can adopt gas or liquid as a secondary fluid.In heat release heat exchanger 47, refrigeration working medium thermotropism remittance heat release.In heat absorption heat exchanger 49, refrigeration working medium absorbs heat from thermal source.
The inlet 28 of main compressor 70 is connected with the outlet of heat absorption heat exchanger 49, and its outlet 34 is connected with the inlet of heat release heat exchanger 47.The decompressor inlet of decompressor/compressor unit 31 linked to each other with the export and import of heat release heat exchanger 47 respectively by first switch valve 65, the 4th switch valve 67 with compressor outlet 14 (the 4th communicating pipe) 12 (first communicating pipes).The suction port of compressor 10 of decompressor/compressor unit 31 (second communicating pipe) links to each other with outlet with the import of heat absorption heat exchanger 47 respectively by second switch valve 66, the 3rd switch valve 68 with decompressor outlet 5 (third connecting pipes).
Fig. 9 is single-stage swing-rotor type decompressor/compressor unit of being used for third embodiment of the invention longitudinal section when being connected with main compressor is coaxial.Figure 10 is the cross-sectional view that is used for the single-stage swing-rotor type decompressor/compressor unit of third embodiment of the invention.As shown in Figure 9, main compressor 70, motor 62 and decompressor/compressor unit 31 are enclosed in the housing 1, and integrate by main shaft 23.Main shaft 23 passes main compressor 70, base bearing 37, rotor 3, fore bearing 13, decompressor/compressor unit 31 and rear bearing 18 successively by the center.Oil pump 8 is connected the end of main shaft 23, and places the oil groove 6 of housing 1 bottom.Oil pump 8 can extract lubricating oil and be sent to decompressor/compressor unit 31 and main compressor 70 and play lubrication through petroleum pipeline 22 from oil groove 6.
Decompressor/compressor unit 31 is a single-stage rotator type displacement type machinery.Eccentric rotor 26 is formed on the main shaft 23, and its radius is greater than the radius of main shaft 23, and its eccentric throw can be determined according to design parameter.Decompressor/compressor unit 31 comprises cylinder 9, drive end bearing bracket 11, rear end cap 16, eccentric rotor 26 and piston 19.The outer peripheral face of piston 19 in the running just can with the inner peripheral surface sliding-contact of cylinder 9.The internal diameter of piston 19 is slightly larger than the external diameter of eccentric rotor 26, is beneficial to both and assembles.Piston 19 places in the cylinder 9, and two end face is sealed by drive end bearing bracket 11 and rear end cap 16 together with two end faces of cylinder.
In addition as shown in figure 10, fork 25 integrates with piston 19.The shape of fork 25 is similar to a flat board, and is protruding from the outer surface of piston 19.Space between the outer surface of the inner surface of cylinder 9 and piston 19 is divided into suction muffler 20 and discharge chamber 21 (working chamber) by fork 25.A pair of semi-moon shaped guide rail 24 is arranged in the cylinder 9.Guide rail 24 places fork 25 both sides, can rotate with respect to cylinder 9 along with the motion of fork 25.
As shown in figure 10, decompressor/compressor unit 31 has decompressor outlet 5 (the third connecting pipes) that are formed on first stream and decompressor 12 (first communicating pipes) of inlet with the realization expansion process; Have the suction port of compressor 10 (second communicating pipe) that is formed on second stream and compressor outlet 14 (the 4th communicating pipe) to realize compression process; An end and the working chamber of above-mentioned each communicating pipe is that suction muffler 20 or discharge chamber 21 are connected.Decompressor inlet 12 is connected with the 3rd switch valve 68 with first switch valve 65 respectively with the other end of decompressor outlet 5, the other end of suction port of compressor 10 and compressor outlet 14 is connected with the 4th switch valve 67 with second switch valve 66 respectively, realizes switching controls thus.Decompressor inlet 12 is formed on the drive end bearing bracket 11, and links to each other with circular arc decompressor air intake passage 27.Decompressor air intake passage 27 forms along the outer peripheral face of eccentric rotor 26, can communicate with suction muffler 20.Therefore, under the rotating condition of main shaft 23, can realize being communicated with and disconnection between decompressor inlet 12 and the decompressor air intake passage 27, thereby control the breathing process of decompressor.Compressor outlet 14 also is formed at drive end bearing bracket 11, comprises a surge chamber 15 and air bleeding valve 17.Suction port of compressor 10 and decompressor outlet 5 then can be formed on the wall of cylinder 9 very easily.
Decompressor/compressor unit 31 can also be other different mechanism form, for example can be single-stage rolling rotor-type expander/compressor unit, as Figure 11 and shown in Figure 12.Figure 11 is single-stage rolling rotor-type expander/compressor unit of being used for third embodiment of the invention longitudinal section when being connected with main compressor is coaxial.Figure 12 is the cross-sectional view that is used for the single-stage rolling rotor-type expander/compressor unit of third embodiment of the invention.In addition, can also use magnetic valve 64 to realize air-breathing control at inlet 12 places of decompressor.In addition, suction port of compressor 10 and decompressor outlet 5 also can form on rear end cap 16.
Certainly, each gateway of decompressor/compressor unit 31 (end of communicating pipe) 5,12,10,14 can also design on drive end bearing bracket 11, rear end cap 16, cylinder 9 or piston 19 according to its concrete structure in the foregoing description.
The following describes system's operation of the 3rd embodiment.As Fig. 7, shown in Figure 8, when starter motor 62 circulated in the thermal cycle loop to drive refrigeration working medium, the steam compression type refrigeration circulation brought into operation.
During conventional load, decompressor/compressor unit 31 is as the expansion mechanism operation, and switch valve 66,67 cuts out, and switch valve 65,68 is opened, and makes system in high-efficiency operation pattern (first stream) work down, as shown in Figure 7.Main compressor 70 enters heat release heat exchanger 47 after refrigeration working medium is compressed.Refrigeration working medium thermotropism remittance heat release in heat release heat exchanger 47 then.Then, refrigeration working medium flows into decompressor/compressor unit 31 by decompressor inlet 12.This moment, expansion mechanism 48 was closed.In decompressor/compressor unit 31, high-pressure fluid expands and does work, and can be converted into the rotation energy in it simultaneously, and process auxiliary drive main shaft 23 rotates.Low pressure two phase flow after the expansion flows out decompressor/compressor unit 31 from decompressor outlet 5, enters heat absorption heat exchanger 49 then.Refrigeration working medium the heat absorption heat exchanger 49 in from absorbing heat the thermal source on every side.Low-pressure fluid flows out heat absorption heat exchanger 50 and sucks main compressor 70 through main compressor inlet 28 then.Thereby finish whole kind of refrigeration cycle.
When device temperature sensor (not shown) detects indoor temperature above a certain pre-set threshold, can judge that this moment, refrigerating circulatory device operated under the peak load, the signal of telecommunication according to control device (not shown), switch valve 65,68 cuts out automatically, and switch valve 66,67 is opened automatically, make decompressor/compressor unit 31 as the compression device operation, thereby system is according to big capacity model (second stream) operation, as shown in Figure 8.
Because switch valve 65,68 cuts out, and switch valve 66,67 is opened, the refrigeration working medium after the heat release flows into expansion mechanism 48.The high pressure refrigeration working medium flows into heat absorption heat exchanger 49 after the throttling step-down is two-phase fluid in expansion mechanism 48, and refrigeration working medium after the heat absorption, is divided into two-way from thermal source in heat absorption heat exchanger 49: the one tunnel 28 is inhaled into main compressor 70 through entering the mouth; Another road is inhaled into decompressor/compressor unit 31 through switch valve 66 and suction port of compressor 10.Finish whole kind of refrigeration cycle thus.
Above-mentioned decompressor/compressor unit 31 and main compressor 70 can be shared main shaft 23 (as Fig. 9, shown in Figure 11) by an axle ways of connecting, also can for by mandrel connector A with its main shaft 23 ' with 23 " link together (as shown in figure 13).
Though 3 kinds of preferred implementations of the present invention more than have been described, the present invention is not limited to above embodiment.For example, though the refrigeration working medium in the above embodiment is CO
2, but also can be NH
3Wait other refrigeration working medium.In addition, for example, though all be connected between decompressor/compressor unit and the main compressor in the above embodiment by current transformer or axle, even but there are not such connection means between the two, main purpose of the present invention also can realize by the switching between first stream and second stream.
Figure 14 is the systematic function comparison diagram of varying capacity refrigerating circulatory device when evaporating temperature changes.When system moves under high efficiency mode, system's heating and refrigerating performance COP
h, COP
cHeating and refrigerating performance COP when moving under big capacity model greater than it respectively
Hr, COP
CrBecause can recovery section decompressional expansion merit when decompressor/ compressor unit 51,57 or decompressor/compressor unit 31 move as expansion mechanism, thereby can effectively improve systematic function, the high-efficiency operation pattern can satisfy the energy-conservation demand under user's conventional load operating mode.
Figure 15 is the system refrigerating capacity comparison diagram of varying capacity refrigerating circulatory device when evaporating temperature changes.When system moves under big capacity model, system's heat supply or refrigerating capacity Q
Hr, Q
CrHeat supply or refrigerating capacity Q when moving under high efficiency mode greater than it respectively
h, Q
cAbout 32% and 24%.Because 31 this moments of decompressor/ compressor unit 51,57 or decompressor/compressor unit can be improved power system capacity during as gas-booster and main compressor equipment paired running.So the high-volume run pattern can satisfy the capacity requirement under user's peak load operating mode.And the high-volume run pattern, can also when just starting, enable according to user's indication, refrigerating circulatory device to reach the design temperature target rapidly.
As mentioned above, varying capacity refrigerating circulatory device of the present invention can satisfy the big capacity requirement of user under peak load with better simply structure, can satisfy the energy-efficient requirement under user's conventional load in addition.Obviously, the present invention can be widely used in various air conditioner refrigerating EGRs.
Claims (9)
1. refrigerating circulatory device, it is used for circularly cooling working medium, comprises a kind of refrigeration cycle loop, and this kind of refrigeration cycle loop comprises main compressor, heat release heat exchanger, expansion mechanism and heat absorption heat exchanger, it is characterized in that,
Described kind of refrigeration cycle loop also comprises decompressor/compressor unit and switching device shifter; And
Constitute first stream by described main compressor, described heat release heat exchanger, described decompressor/compressor unit and described heat absorption heat exchanger;
Constitute second stream by described main compressor, described heat release heat exchanger, described expansion mechanism, described decompressor/compressor unit and described heat absorption heat exchanger;
Described switching device shifter is used to make refrigeration working medium to switch between described first stream and described second stream.
2. refrigerating circulatory device as claimed in claim 1 is characterized in that,
Described refrigeration working medium is a carbon dioxide.
3. refrigerating circulatory device as claimed in claim 1 is characterized in that,
Described decompressor/compressor unit is connected by axle with described main compressor.
4. refrigerating circulatory device as claimed in claim 1 is characterized in that,
Described decompressor/compressor unit is electrically connected by between current transformer and the described main compressor.
5. refrigerating circulatory device as claimed in claim 1 is characterized in that,
Described decompressor/compressor unit comprises cylinder, first communicating pipe and second communicating pipe; This cylinder comprises first cylinder, second cylinder and be connected two runner pipes between the cylinder body for refrigeration working medium is circulated between described first cylinder and described second cylinder; Described first cylinder is connected with the end of described first communicating pipe; Described second cylinder is connected with the end of described second communicating pipe.
6. refrigerating circulatory device as claimed in claim 5 is characterized in that,
Described switching device shifter comprises second triple valve that first triple valve that is connected with the other end of described first communicating pipe is connected with the other end with described second communicating pipe.
7. refrigerating circulatory device as claimed in claim 1 is characterized in that,
Described decompressor/compressor unit comprises the working chamber that is formed by the single-stage cylinder, and first communicating pipe that is connected with this working chamber, second communicating pipe, third connecting pipe and the 4th communicating pipe.
8. refrigerating circulatory device as claimed in claim 7 is characterized in that,
Described switching device shifter comprises, first switch valve and the 3rd switch valve that are formed on described first stream and are connected respectively with an other end of described first communicating pipe and described third connecting pipe, and the second switch valve and the 4th switch valve that are formed on described second stream and are connected respectively with the other end of described second communicating pipe and described the 4th communicating pipe.
9. refrigerating circulatory device as claimed in claim 1 is characterized in that,
In described first stream, refrigeration working medium flow to the entrance side of described heat absorption heat exchanger successively through described main compressor, described heat release heat exchanger, described decompressor/compressor unit from the outlet side of described heat absorption heat exchanger;
In described second stream, refrigeration working medium is from the outlet side of described heat absorption heat exchanger, behind the stream arranged side by side through described main compressor and described decompressor/compressor unit, flow to the entrance side of described heat absorption heat exchanger successively through described heat release heat exchanger, described expansion mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101286073A CN101135504A (en) | 2006-08-29 | 2006-08-29 | Refrigerating cycle device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101286073A CN101135504A (en) | 2006-08-29 | 2006-08-29 | Refrigerating cycle device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184906A (en) * | 2011-12-31 | 2013-07-03 | 新奥科技发展有限公司 | Energy supply method and device |
| CN102575885B (en) * | 2009-10-07 | 2014-09-10 | 三菱电机株式会社 | Refrigeration cycle device |
| CN106440510A (en) * | 2016-02-25 | 2017-02-22 | 李华玉 | Second-class thermally driven compression heat pump |
| CN107024031A (en) * | 2017-05-27 | 2017-08-08 | 中原工学院 | A kind of three pressure high-efficiency air cooling source pumps suitable for the big temperature difference |
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2006
- 2006-08-29 CN CNA2006101286073A patent/CN101135504A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575885B (en) * | 2009-10-07 | 2014-09-10 | 三菱电机株式会社 | Refrigeration cycle device |
| CN103184906A (en) * | 2011-12-31 | 2013-07-03 | 新奥科技发展有限公司 | Energy supply method and device |
| CN103184906B (en) * | 2011-12-31 | 2016-06-29 | 新奥科技发展有限公司 | The method of energy supply and device |
| CN106440510A (en) * | 2016-02-25 | 2017-02-22 | 李华玉 | Second-class thermally driven compression heat pump |
| CN106440510B (en) * | 2016-02-25 | 2020-05-29 | 李华玉 | Second-class thermally-driven compression heat pump |
| CN107024031A (en) * | 2017-05-27 | 2017-08-08 | 中原工学院 | A kind of three pressure high-efficiency air cooling source pumps suitable for the big temperature difference |
| CN107024031B (en) * | 2017-05-27 | 2022-08-02 | 中原工学院 | Three-pressure high-efficiency air-cooled heat pump unit suitable for large temperature difference |
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Application publication date: 20080305 |