JP2007064052A - Hybrid compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hybrid compressor with improved driveability and durability, which can surely prevent adverse effect on external equipment, by efficiently separating oil mixed into a delivered fluid in a delivery space. <P>SOLUTION: The hybrid compressor has two scroll compressor mechanisms separately driven by two driving sources, bottom plate sides of fixed scrolls of the scroll compressor mechanisms are disposed respectively to be back to back to form the delivery space between the fixed scrolls. The fixed scroll of one compression mechanism with large delivery capacity out of the two compression mechanisms is constituted separately from the fixed scroll of the other compression mechanism with small delivery capacity, and an oil separator is disposed in the delivery space. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hybrid compressor having two scroll type compression mechanisms and fixed scrolls of both compression mechanisms arranged back to back, and more particularly to a hybrid compressor suitable for a vehicle air conditioner.

  Conventionally, hybrid compressors that can be driven by two drive sources are well known. Such a hybrid compressor includes a single compression mechanism that can be driven by a vehicle engine or a built-in electric motor. For example, when the engine is stopped when driven by the engine, the hybrid compressor is driven by the built-in electric motor. Switching is performed (for example, Patent Document 1). However, in the conventional hybrid compressor as described above, a single compression mechanism is selectively driven by two drive sources having different outputs, so that driving efficiency may be lowered. Further, there is a possibility that a torque shock may occur when the drive source is switched.

  For such a hybrid compressor, a hybrid in which a first compression mechanism that is driven by the applicant of the present invention only with the engine of the vehicle and a second compression mechanism that is driven only with the built-in electric motor are integrally formed. A compressor has also been proposed (Patent Document 2). In such a hybrid compressor, each compression mechanism has its own drive source, and both compression mechanisms are driven simultaneously or independently, so that the compression mechanism can be driven efficiently. As a result, the occurrence of torque shock is surely prevented. Furthermore, in the compressor described in Patent Document 2, the fixed scrolls of both compression mechanisms are arranged back to back, and both the fixed scrolls are integrally formed, and the fluid discharged from both compression mechanisms is formed between the two fixed scrolls. Since discharge is made into a single discharge chamber through the discharged discharge space (discharge passage), downsizing of the apparatus, particularly downsizing in the axial direction of the compressor is promoted. .

However, in the hybrid compressor as in Patent Document 2 above, the fixed scrolls of both compression mechanisms are integrally formed back to back, and the both fixed scrolls are formed integrally with the compressor housing, so that the discharge from the compression mechanism. It is difficult to install an oil separator in the discharge space through which the fluid is passed. For this reason, there is a possibility that the mist-like oil mixed in the discharge fluid cannot be separated in the compressor. As a result, the oil (lubricating oil, etc.) of the sliding portion in the compressor is insufficient, and the driveability and durability of the compressor May decrease. Further, when a fluid containing mist-like oil flows into the external heat exchanger of the compressor, there is a possibility that the refrigeration capacity may be adversely affected.
JP 2000-130323 A JP 2003-161257 A

  Accordingly, an object of the present invention is to provide a hybrid capable of improving the drivability and durability of the apparatus and reliably preventing a decrease in refrigeration capacity by efficiently separating oil mixed in the discharge fluid in the discharge space. It is to provide a compressor.

  In order to solve the above problems, a hybrid compressor according to the present invention has two scroll-type compression mechanisms driven separately by two drive sources, and the bottom plate of each fixed scroll of the two scroll-type compression mechanisms. In the hybrid compressor in which the sides are arranged back to back and a discharge space is provided between the two fixed scrolls, the fixed scroll of the compression mechanism having a large discharge capacity and the fixed scroll of the compression mechanism having a small discharge capacity among the two scroll type compression mechanisms And an oil separator is provided in the discharge space. In such a configuration, for example, the fixed scroll of the compression mechanism driven by the engine and the fixed scroll of the compression mechanism driven by the built-in electric motor are configured separately, so that they are formed between the two fixed scrolls. An oil separator can be easily installed in the discharge space. Further, in such a configuration, the fixed scroll of the compression mechanism having a large discharge capacity and the fixed scroll of the compression mechanism having a small discharge capacity are combined back to back to form a discharge space between the two fixed scrolls. The discharge space can be set freely according to the combination method, etc., and the discharge valve can be mounted immediately after the discharge hole. Therefore, since the space from the discharge hole to the discharge valve can be set smaller than when both the fixed scrolls are integrally formed, so-called dead space can be greatly reduced.

  Further, in such a configuration, the fixed scroll of the compression mechanism having a small discharge capacity can be accommodated in the bottom plate of the fixed scroll of the compression mechanism having a large discharge capacity. Since the back surface and the end surface of the spiral wound body formed on the bottom plate of the fixed scroll of the scroll compressor having a small discharge capacity can be configured to be flush with each other, it is possible to contribute to miniaturization of the hybrid compressor.

  The oil separator can be configured from an oil filter and an oil reservoir provided below the oil filter. Moreover, it is preferable to provide an oil diffusion prevention plate between the oil filter and the oil reservoir for preventing the oil in the oil reservoir from diffusing. Providing such an oil diffusion prevention plate prevents the oil in the oil reservoir from scattering and diffusing so that the oil surface can be held stably, ensuring that the oil once separated from the discharged fluid is prevented from re-scattering. And the oil separation effect can be improved.

  The oil reservoir is preferably provided with an oil supply passage for supplying oil to the suction side of the compressor. If such an oil supply passage is provided, the oil in the oil reservoir can be supplied again to each sliding part in the compressor, thereby eliminating the risk of lack of lubricating oil, etc., and improving the drivability and durability of the device. Can be improved.

  The oil separator is preferably provided with an oil relief passage for sending the oil separated by the oil filter to the oil reservoir. By providing such an oil relief passage, the oil separated by the oil filter can be efficiently returned to the oil reservoir, so the risk of lack of lubricating oil in the device can be reliably eliminated, and the device Driveability and durability can be further improved.

  The oil filter can be formed from, for example, a wire mesh, a porous material (for example, resin), or the like.

  In the hybrid compressor according to the present invention, since the both fixed scrolls are configured separately, the oil separator can be easily installed in the discharge space formed between the two fixed scrolls, and the oil is discharged from the discharged fluid in the apparatus. Can be separated. Therefore, since the risk of lack of lubricating oil in the compressor is solved, the drivability and durability of the apparatus can be improved. In addition, since the space from the discharge hole to the discharge valve can be set smaller than when both fixed scrolls are formed integrally, so-called dead space can be greatly reduced, contributing to downsizing of the device while improving compressor performance. can do.

Hereinafter, preferred embodiments of a hybrid compressor according to the present invention will be described with reference to the drawings.
1 to 3 show a hybrid compressor according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a hybrid compressor. In FIG. 1, the hybrid compressor 1 is configured as a scroll-type hybrid compressor. The hybrid compressor 1 includes a first compression mechanism 2 and a second compression mechanism 3. The first compression mechanism 2 includes a fixed scroll 6 including a bottom plate 4 and a spiral wound body 5 integrated with the bottom plate 4, and a movable scroll including a bottom plate 7 and a spiral winding body 8 integrated with the bottom plate 7. 9. The spiral body 5 of the fixed scroll 6 and the spiral body 8 of the movable scroll 9 are engaged with each other at an angle. In the present embodiment, the fixed scroll 6 is formed integrally with the housing 1 a of the compressor 1.

  A crankshaft having a crank mechanism 11 is integrally formed at one end of the drive shaft 10. The crank pin 12 of the crank mechanism 11 is provided at a position eccentric from the axis of the drive shaft 10 and is inserted and fitted to the eccentric bush 13 with a certain play amount. The eccentric bush 13 is rotatably inserted into a drive bearing 14 inserted into the protrusion of the movable scroll 9. In this embodiment, when the power from the engine 15 is transmitted to the drive shaft 10 via the clutch mechanism 16 provided at the other end of the drive shaft 10 as a first drive source that drives only the first compression mechanism 2. The eccentric bush 13 inserted and fitted to the crank pin 12 rotates. Along with this, a turning motion is imparted to the movable scroll 9 whose rotation is blocked by the ball coupling 33 as a rotation blocking mechanism. In addition, transmission and interruption of power to the drive shaft 10 are performed by turning on and off the clutch mechanism 16.

  The suction fluid that has flowed into the compressor 1 from the suction chamber 17 having a suction port (not shown) as the movable scroll 9 swivels moves from the outer ends of the spiral bodies 5 and 8 into the spiral body. It is captured. Then, as the fluid pocket formed by the spiral bodies 5 and 8 moves toward the center while reducing its volume, the fluid is compressed and discharged in the bottom plate 4, in other words, the housing 1a. It is discharged from the hole 18 through a discharge passage 19 into a discharge chamber 20 provided outside the housing 1a. The discharge hole 18 is opened and closed by a valve 18a. The discharge chamber 20 is provided with a discharge port (not shown), and fluid is sent from the discharge port into a heat exchanger (for example, a condenser) of the vehicle air conditioner.

  The second compression mechanism 3 includes a fixed scroll 23 composed of a bottom plate 21 and a spiral wound body 22 integrated with the bottom plate 21, and a movable scroll composed of a bottom plate 24 and a spiral wound body 25 integrated with the bottom plate 24. 26. In the present embodiment, the fixed scroll 23 is formed separately from the housing 1a. In the present embodiment, the fixed scroll 6 of the first compression mechanism 2 and the fixed scroll 23 of the second compression mechanism 3 are formed separately, and the fixed scroll 23 is placed in the fixed scroll 6 as shown in FIG. It is stored. When the fixed scroll 23 is housed in the fixed scroll 6, the end surface 22 a of the spiral body 22 of the fixed scroll 23 is substantially flush with the back surface 4 a of the bottom plate 4 of the fixed scroll 6. .

  A crankshaft having a crank mechanism 28 is integrally formed at one end of the drive shaft 27. The crank pin 29 of the crank mechanism 28 is provided at a position eccentric from the axis of the drive shaft 27 and is inserted and fitted to the eccentric bush 30 with a certain play amount. The eccentric bush 30 is rotatably inserted into a drive bearing 31 that is inserted into the protrusion of the movable scroll 26. In this embodiment, when the power from the built-in electric motor 32 as the second drive source is transmitted to the drive shaft 27 from the rotor 35 fixed to the drive shaft 27, the eccentricity into which the crank pin 29 is inserted and fitted. The bush 30 rotates. Along with this, the orbiting motion is given to the movable scroll 26 whose rotation is blocked by the ball coupling 34 as the rotation blocking mechanism. Reference numeral 36 denotes a stator of the built-in electric motor 32.

  The suction fluid flowing into the compressor 1 from the suction chamber 17 having a suction port with the turning motion of the movable scroll 26 is taken into the spiral body from the outer ends of the spiral bodies 22 and 25. Then, as the fluid pocket formed by the spiral bodies 22 and 25 is moved toward the center while reducing its volume, the fluid is compressed and discharged from the discharge hole 37 formed in the bottom plate 21. It is discharged into a discharge chamber 20 provided outside the housing 1a. The discharge hole 37 is opened and closed by a valve 37a.

  An oil separator 38 having an oil separator body 39 is provided in the discharge passage 19. Below the oil separator body 39, an oil reservoir 40 is provided for storing oil separated from the discharged fluid. The oil separator main body 39 is supported at a predetermined position of the discharge passage 19 via a support member 44. The oil separator body 39 is not particularly limited, and can be formed from, for example, a wire mesh or a porous material (for example, resin).

  Between the oil separator main body 39 and the oil reservoir 40, there is provided an oil diffusion prevention plate 41 for preventing the oil accumulated in the oil reservoir 40 from diffusing and scattering. In this embodiment, the oil diffusion preventing plate 41 is formed integrally with the fixed scroll 23. The oil separated by the oil separator body 39 is returned into the oil reservoir 40 through an oil return passage 47 provided in the oil diffusion prevention plate 41.

  The oil reservoir 40 is provided with oil supply passages 42 and 43 for supplying the oil in the oil reservoir 40 to the suction side 17a of the compressor 1. The oil supply passage 42 is formed in the spiral body 5 of the fixed scroll 6. On the other hand, the oil supply passage 43 is formed in the spiral body 22 of the fixed scroll 23. The oil in the oil reservoir 40 is supplied again to the suction side 17a of the compressor 1 through the oil supply passages 42 and 43.

  The oil separator 38 is also provided with oil relief passages 45 and 46 for sending the oil separated by the oil separator main body 39 to the oil reservoir 40 as shown in FIG.

  In the present embodiment, the fixed scroll 6 of the compression mechanism 2 driven by the engine 15 and the fixed scroll 23 of the compression mechanism 3 driven by the built-in electric motor 32 are configured separately. , 23 can be easily installed in the discharge passage 19 formed between the two. In such a configuration, the fixed scroll 6 of the compression mechanism 2 having a large discharge capacity and the fixed scroll 23 of the compression mechanism 3 having a small discharge capacity are combined back to back to form a discharge passage 19 between the two fixed scrolls. Therefore, the sectional area of the discharge passage 19 can be set sufficiently small by changing the insertion allowance of the fixed scroll 23 into the fixed scroll 6. Accordingly, since the space from the discharge hole to the discharge valve can be set smaller than when both the fixed scrolls 6 and 23 are integrally formed, so-called dead space can be greatly reduced.

  In the present embodiment, the fixed scroll 23 of the compression mechanism 3 having a small discharge capacity can be accommodated in the bottom plate 4 of the fixed scroll 6 of the compression mechanism 2 having a large discharge capacity. Since 4a and the end surface 22a of the spiral wound body 22 formed on the bottom plate 21 of the fixed scroll 23 can be configured to be flush with each other, the hybrid compressor 1 can be reduced in size.

  In addition, since an oil diffusion prevention plate 41 that prevents the oil in the oil reservoir 40 from diffusing is provided between the oil separator main body 39 and the oil reservoir 40, oil scattering in the oil reservoir 40, Diffusion can be prevented and the oil level can be kept constant. Therefore, re-scattering of the oil once separated from the discharged fluid can be reliably prevented, and the oil separation effect can be improved.

  Further, since the oil reservoir 40 is provided with oil supply passages 42 and 43 for supplying oil to the suction side 17a of the compressor, the oil in the oil reservoir 40 can be supplied again to each part in the compressor. it can. Therefore, the risk of lack of lubricating oil in the apparatus is solved, and the drivability and durability of the apparatus can be improved.

  The oil separator 38 is provided with oil relief passages 45 and 46 for returning the oil separated by the oil separator main body 39 to the oil reservoir 40, so that the oil separated by the oil filter 39 is efficiently transferred to the oil reservoir 40. Can be restored. Therefore, the risk of lack of lubricating oil in the apparatus can be reliably eliminated, and the drivability and durability of the apparatus can be further improved.

The present invention can be applied to a hybrid compressor having two scroll type compression mechanisms and fixed scrolls of both compression mechanisms arranged back to back, and is particularly suitable for a hybrid compressor of a vehicle air conditioner.

It is sectional drawing of the hybrid compressor which concerns on one embodiment of this invention. FIG. 2 is an enlarged vertical sectional view of a fixed scroll portion of the hybrid compressor of FIG. 1. FIG. 2 is an enlarged cross-sectional view of a fixed scroll portion of the hybrid compressor of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hybrid compressor 1a Housing 2 1st compression mechanism 3 2nd compression mechanism 4, 7, 21, 24 Bottom plate 4a Back surface of bottom plate 5, 8, 22, 25 Spiral wound body 6, 23 Fixed scroll 7a Back surface 9, 26 Movable scroll 10, 27 Drive shaft 11, 28 Crank mechanism 12, 29 Crank pin 13, 30 Eccentric bush 14, 31 Drive bearing 15 Engine as first drive source 16 Clutch mechanism 17 Suction chamber 17a Suction side 18, 37 Discharge hole 18a, 37a Valve 19 Discharge passage 20 Discharge chamber 22a End face 32 Built-in electric motor 33, 34 as a second drive source 33, 34 Ball coupling 35 Rotor 36 Stator 38 Oil separator 39 Oil separator body 40 Oil reservoir 41 Oil diffusion prevention plate 42, 43 Oil supply passage 44 Oil fill Support member 45, 46 Oil relief passage 47 Oil return passage

Claims (10)

  A hybrid having two scroll-type compression mechanisms driven separately by two drive sources, the bottom plates of the fixed scrolls of the two scroll-type compression mechanisms arranged back to back, and a discharge space provided between the two fixed scrolls In the compressor, the fixed scroll of the compression mechanism having a large discharge capacity and the fixed scroll of the compression mechanism having a small discharge capacity of the two scroll type compression mechanisms are configured separately, and an oil separator is provided in the discharge space. A hybrid compressor characterized by being provided.   The hybrid compressor according to claim 1, wherein a fixed scroll of a compression mechanism having a small discharge capacity is accommodated in a bottom plate of the fixed scroll of the compression mechanism having a large discharge capacity.   The back surface of the bottom plate of the fixed scroll of the compression mechanism having a large discharge capacity and the end surface of the spiral wound body formed on the bottom plate of the fixed scroll of the compression mechanism having a small discharge capacity are configured to be flush with each other. 2 hybrid compressor.   The hybrid compressor according to claim 1, wherein the oil separator includes an oil filter and an oil reservoir provided below the oil filter.   5. The hybrid compressor according to claim 4, wherein an oil diffusion prevention plate is provided between the oil filter and the oil reservoir for preventing oil from diffusing in the oil reservoir.   The hybrid compressor according to claim 4 or 5, wherein an oil supply passage is provided for supplying the oil in the oil reservoir to the suction side of the compressor.   The hybrid compressor according to any one of claims 4 to 6, further comprising an oil relief passage for returning the oil separated by the oil filter to an oil reservoir.   The hybrid compressor according to claim 4, wherein the oil filter is made of a wire mesh.   The hybrid compressor according to claim 4, wherein the oil filter is made of a porous material.   The hybrid compressor according to claim 9, wherein the porous material is made of a resin.

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