JP2011080444A - Multifunctional fluid machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multifunctional fluid machine improving the cooling efficiency of a rotary electric machine section. <P>SOLUTION: In a housing 12, a first storage space 15a and a second storage space 15b are separated from each other by a partitioning wall 15, and a motor generator 17 is stored in the first storage space 15a. A suction hole 13b for sucking a refrigerant having circulated a refrigerating cycle to a compressor section 31 through the first storage space 15a is formed in the position of the peripheral wall of a center housing 13, corresponding to the first storage space 15a, and in a position located adjacently to the partitioning wall 15. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes an expander unit that outputs mechanical energy by expansion of a Rankine cycle working fluid, a compressor unit that compresses the refrigeration cycle working fluid, and a rotating electrical machine unit that functions as a generator or an electric motor. The present invention relates to a composite fluid machine provided for the above.

  An example of this type of composite fluid machine is the fluid machine disclosed in Patent Document 1. This fluid machine includes a compressor unit that compresses a fluid, an expander unit that generates a rotational driving force by waste heat (exhaust heat) energy of an engine (external drive source), and a motor that has both functions of an electric motor and a generator. (Rotating electrical machine part). Furthermore, the fluid machine is connected to the engine via a pulley, and the power transmission path among the pulley, motor, and compressor unit is switched to the fluid machine, and the rotational speed of the rotational power is reduced or increased. A transmission mechanism is provided. The arrangement of these devices in the fluid machine is in the order of the expander section, the motor, the speed change mechanism, and the compressor section from the pulley side in the housing.

  In such a fluid machine, it is important to cool a motor serving as a drive unit. And in the fluid machine of patent documents 1, while forming a low-pressure port (suction hole) in the pulley side rather than the expander part in the peripheral wall of a housing, while drawing a low-temperature refrigerant into a housing from a low-pressure port, an expander part, It passes through the housing so as to cross the motor and speed change mechanism, and is sucked into the compressor section. Accordingly, the motor is cooled by the low-temperature refrigerant and the oil contained in the refrigerant passing around the motor.

JP 2005-307951 A

  However, in the fluid machine disclosed in Patent Document 1, the refrigerant sucked from the low pressure port passes through the expander unit before passing through the motor, so that the refrigerant is heated by receiving heat from the expander unit. Therefore, the motor is cooled by the warmed refrigerant, and there is a problem that the cooling efficiency of the motor is deteriorated.

  The present invention has been made paying attention to such problems existing in the prior art, and an object of the present invention is to provide a composite fluid machine capable of improving the cooling efficiency of the rotating electrical machine part. .

  In order to achieve the above object, an invention according to claim 1 includes an expander section that outputs mechanical energy by expansion of a Rankine cycle working fluid, a compressor section that compresses the refrigeration cycle working fluid, and power generation. A rotary electric machine part that functions as a motor or an electric motor, and the compressor part, the rotary electric machine part, and the expander part are arranged in parallel in the housing, and the rotary electric machine part is provided in the housing. A partition wall that separates the first storage space in which the part is stored and the second storage space in which the expander unit is stored is provided, and the working fluid for the refrigeration cycle is passed through the first storage space. The gist is that a suction hole for sucking into the compressor section is formed at a position corresponding to the first accommodation space.

  According to the present invention, when the refrigeration cycle working fluid is sucked into the compressor section, the low-temperature refrigeration cycle working fluid is sucked into the first housing space in which the rotating electrical machine section is housed through the suction hole. The rotating electrical machine part is cooled by the working fluid for the refrigeration cycle. At this time, since the first storage space and the second storage space are separated by the partition wall, the working fluid for the refrigeration cycle sucked into the first storage space is stored in the expander unit stored in the second storage space. Hard to receive heat. Therefore, the working fluid for the refrigeration cycle can cool the rotating electrical machine part without being warmed by the heat of the expander part, and the rotating electrical machine part is cooled by the working fluid for the refrigeration cycle warmed by the heat of the expander part. Compared to the case, the cooling efficiency of the rotating electrical machine part can be improved.

  According to a second aspect of the present invention, in the first aspect of the present invention, in the housing, the compressor unit, along the axial direction of the drive shaft of the rotating electrical machine unit and the compressor shaft of the compressor unit, The gist is that the rotating electrical machine part and the expander part are arranged in this order, and the suction hole is formed closer to the partition part than the compressor part in the axial direction.

  According to this invention, the refrigeration cycle working fluid sucked into the first housing space from the suction hole flows from the partition wall side toward the compressor portion in the first housing space. Therefore, the working fluid for the refrigeration cycle spreads over the entire first housing space, and the entire rotating electrical machine unit can be cooled by the working fluid for the refrigeration cycle.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the drive shaft of the rotating electrical machine part and the compressor shaft of the compressor part are connected or disconnected in the housing. The gist is that switching means for switching to a state is provided between the compressor section and the rotating electrical machine section.

  According to the present invention, the working fluid for the refrigeration cycle sucked into the first accommodation space from the suction hole flows across the switching means when flowing toward the compressor section, and therefore is rotated by the working fluid for the refrigeration cycle. In addition to the electric part, the switching means can also be cooled.

  According to this invention, the cooling efficiency of the rotating electrical machine part can be improved.

The longitudinal cross-sectional view which shows the composite fluid machine in embodiment. The schematic diagram which shows the exhaust heat recovery system for vehicles.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 and 2.
First, the whole structure of the exhaust heat recovery system 10 for vehicles provided with the composite fluid machine 11 of this embodiment is demonstrated.

  As shown in FIG. 2, the vehicle exhaust heat recovery system 10 includes an engine Eg as an exhaust heat source, and also includes a refrigeration cycle 30 configured in separate cycles and a Rankine cycle 20. In the refrigeration cycle 30, refrigerant as a refrigeration cycle working fluid circulates for vehicle air conditioning, and in the Rankine cycle 20, a refrigerant as a Rankine cycle working fluid heated by exhaust heat from the engine Eg circulates. To do. In the vehicle exhaust heat recovery system 10, the composite fluid machine 11 constitutes a part of the Rankine cycle 20 and a part of the refrigeration cycle 30.

Next, the composite fluid machine 11 will be described. In the following description, the “front” and “rear” of the composite fluid machine 11 have the direction of the arrow Y shown in FIG.
As shown in FIG. 1, the complex fluid machine 11 includes a housing 12. The housing 12 is joined to a cylindrical center housing 13, a front housing 14 joined to the front end (one end) of the center housing 13, and a rear end (other end) of the center housing 13 via a partition wall 15. The rear housing 16 is formed.

  A partition forming portion 13 a extending inward of the center housing 13 is provided on the inner peripheral surface of the center portion of the center housing 13. In the housing 12, the first housing space 15 a is partitioned and formed by the center housing 13, the partition wall portion 15, and the partition forming portion 13 a, and the second housing space 15 b is partitioned by the rear housing 16 and the partition wall portion 15. Is formed. The first storage space 15 a and the second storage space 15 b are separated from each other by the partition wall portion 15. Further, in the housing 12, a third housing space 15c is partitioned and formed by the center housing 13, the front housing 14, and the partition forming portion 13a, and the first housing space 15a and the third housing space 15c are formed by the partition forming portion. They are separated from each other by 13a.

  A suction hole 13 b is formed at a position corresponding to the first accommodation space 15 a on the peripheral wall of the center housing 13 and adjacent to the partition wall portion 15. In addition, a communication hole 13c is formed in the partition forming portion 13a, and the first storage space 15a and the third storage space 15c are communicated with each other through the communication hole 13c.

  A motor / generator 17 as a rotating electrical machine unit is accommodated in the first accommodating space 15a. The motor / generator 17 has a drive shaft 18. An insertion hole 13e into which the front end side (one end side) of the drive shaft 18 can be inserted is formed in the partition forming portion 13a. The front end side of the drive shaft 18 is rotatably supported by a bearing 24 provided in the insertion hole 13 e, and the rear end side (the other end side) is provided on the partition wall 15. Is supported rotatably. Therefore, the drive shaft 18 is rotatably supported by the bearing 24 and the drive shaft bearing 25 on both sides in the axial direction (the direction of the axis L shown in FIG. 1).

  A motor rotor 17 a is fixed to the drive shaft 18 so as to be rotatable integrally with the drive shaft 18. A stator 17b is fixed to the inner peripheral surface of the center housing 13 so as to surround the motor rotor 17a. The motor / generator 17 functions as an electric motor that rotates the motor rotor 17a by energizing the coil 17c of the stator 17b and a generator that generates electric power in the coil 17c of the stator 17b by rotating the motor rotor 17a. Combined with functions.

  As shown in FIG. 2, a battery 19 a is connected to the motor / generator 17 via an inverter 19, and electric power generated by the motor / generator 17 is stored in the battery 19 a via the inverter 19. The inverter 19 is connected to a control unit 21 that controls the composite fluid machine 11 throughout.

  As shown in FIG. 1, a support block 13 d is fixed on the front side in the center housing 13. A central portion of the compressor shaft 22 in the axial direction is rotatably supported by the support block 13 d by a compressor shaft bearing 23, and the compressor shaft 22 is disposed coaxially with the drive shaft 18. Further, the drive shaft 18 and the compressor shaft 22 are disposed such that the front end surface (one axial end surface) of the drive shaft 18 and the rear end surface (other axial end surface) of the compressor shaft 22 face each other.

  A protrusion 22a is provided at the rear end of the compressor shaft 22, and a first clutch plate 26 is fitted into the protrusion 22a. A projection 18a is provided at the front end of the drive shaft 18, and a second clutch plate 27 is fitted to the projection 18a. The first clutch plate 26 and the second clutch plate 27 are opposed to each other. The 2nd clutch board 27 is arrange | positioned in the position facing the front surface of the division formation part 13a.

  An electromagnetic coil 28 is disposed on the rear end side of the support block 13d so as to face the first clutch plate 26. When the electromagnetic coil 28 is energized, the electromagnetic coil 28 is excited and the first clutch plate 26 and the second clutch plate 27 are attracted to each other to be connected, while the electromagnetic coil 28 is energized. When the operation is not performed, the first clutch plate 26 and the second clutch plate 27 are separated from each other to be disconnected. Therefore, the first clutch plate 26, the second clutch plate 27, and the electromagnetic coil 28 constitute an electromagnetic clutch 29 as switching means.

  A scroll type compressor unit 31 is provided in the third housing space 15c. At the front end of the compressor shaft 22, an eccentric shaft 22 b is provided at a position eccentric with respect to the central axis of the compressor shaft 22, and the eccentric shaft 22 b revolves around the central axis of the compressor shaft 22 by the rotation of the compressor shaft 22. It has become.

  A bush 32 is fixed to the eccentric shaft 22b, and the bush 32 revolves around the central axis of the compressor shaft 22 together with the eccentric shaft 22b. A movable scroll 34 is rotatably supported on the bush 32 via a bearing device 33, and a counterweight 35 is fixed thereto. The movable scroll 34 includes a disk-shaped movable side end plate 34a supported by the bearing device 33, and a spiral movable side spiral wall 34b projecting from the movable side end plate 34a.

  A fixed scroll 36 is fixed to the front end in the center housing 13 so as to face the movable scroll 34. The fixed scroll 36 includes a disk-shaped fixed side end plate 36 a and a spiral fixed side spiral wall 36 b projecting from the fixed side end plate 36 a toward the movable scroll 34. The movable scroll wall 34b of the movable scroll 34 and the fixed scroll wall 36b of the fixed scroll 36 are meshed with each other to define a working chamber 37 whose volume can be changed.

  In addition, a discharge port 36 c is formed at the center of the fixed-side end plate 36 a of the fixed scroll 36, and the discharge port 36 c can be opened and closed by a discharge valve 38. A discharge chamber 39 is defined between the fixed end plate 36a and the front housing 14, and the discharge chamber 39 communicates with the compressed working chamber 37 through a discharge port 36c. Further, the front housing 14 is formed with a discharge hole 14 a communicating with the discharge chamber 39. Further, a suction chamber S is defined between the inner peripheral surface of the fixed scroll 36 and the outermost peripheral surface of the movable spiral wall 34 b in the movable scroll 34.

  A first side plate 41 is fixed in the rear housing 16 so as to face the partition wall portion 15, and a rear side of the housing 12 so that the second side plate 42 faces the first side plate 41 ( It is fixed to the other side in the axial direction with a space. The drive shaft 18 passes through the partition 15, the first side plate 41, and the second side plate 42. A pump chamber 43 is defined between the partition wall 15 and the first side plate 41, and a driven gear (not shown) attached to a driven shaft (not shown) in the pump chamber 43. ), And a main drive gear 44 attached to the drive shaft 18 is disposed. A gear pump 45 is formed by the pump chamber 43, the driven gear and the main driving gear 44.

  The expander unit 51 is accommodated in the second accommodation space 15b. In the rear housing 16, a cylindrical cylinder block 46 is accommodated between the first side plate 41 and the second side plate 42. In the cylinder block 46, a cylindrical rotor 47 is fixed to the drive shaft 18 so as to be integrally rotatable with the drive shaft 18, and extends on the outer circumferential surface of the rotor 47 over the entire axial direction of the rotor 47. The vane 48 is accommodated so that it can appear and disappear. When the leading end surface of the vane 48 comes into contact with the inner peripheral surface of the cylinder block 46 due to the rotation of the rotor 47 accompanying the rotation of the drive shaft 18, the outer peripheral surface of the rotor 47 and the inner peripheral surface of the cylinder block 46 are adjacent to the vane. A working chamber 49 is defined between 48 and the first and second side plates 41, 42.

  Further, in the expander unit 51, a discharge space 52 is defined between the rear housing 16 and the second side plate 42, and a discharge port 16a communicating with the discharge space 52 is formed in the rear housing 16. . In the expander unit 51, a suction port (not shown) that communicates with the working chamber 49 is formed in the rear housing 16.

  In the composite fluid machine 11 configured as described above, in the housing 12, the compressor portion 31, the electromagnetic clutch 29, the motor generator 17, and the like from the front side to the rear side along the axial direction of the drive shaft 18 and the compressor shaft 22. And the expander unit 51 are arranged in the order.

Next, the Rankine cycle 20 and the refrigeration cycle 30 in the vehicle exhaust heat recovery system 10 including the composite fluid machine 11 will be described.
As shown in FIG. 2, the refrigeration cycle 30 is formed by connecting the compressor unit 31, the condenser C, the expansion valve V, and the evaporator E in the composite fluid machine 11 in an annular shape. In the refrigeration cycle 30, a condenser C is connected to the discharge hole 14a of the compressor unit 31 via a compression-side discharge flow path R1. And the refrigerant | coolant compressed by the compressor part 31 to high temperature / high pressure is introduce | transduced into the condenser C via the compression side discharge flow path R1, and is cooled with the condenser C. FIG. An evaporator E is connected to the discharge side of the condenser C via a flow path R2, and an expansion valve V is provided on the flow path R2. The expansion valve V decompresses and expands the refrigerant cooled by the condenser C, and the evaporator E evaporates the refrigerant decompressed by the expansion valve V.

  Further, the discharge side of the evaporator E is connected to the suction hole 13b via the compression side suction flow path R3, and a check valve G is provided on the compression side suction flow path R3, and the check valve G is evaporated. The refrigerant is allowed to flow only from the container E side to the suction hole 13b side. Then, after the refrigerant is compressed by the compressor unit 31, it passes through the condenser C, the expansion valve V, the evaporator E, and the check valve G from the discharge hole 14a, and passes through the suction hole 13b to the first accommodation space 15a. To be inhaled. Further, the refrigerant sucked into the first storage space 15 a is sucked into the compressor unit 31 through the communication hole 13 c via the third storage space 15 c and circulates through the refrigeration cycle 30.

  On the other hand, the Rankine cycle 20 is formed by connecting the expander unit 51 of the composite fluid machine 11, the condenser 53, the gear pump 45 of the composite fluid machine 11, the first boiler 54, and the second boiler 55 in an annular shape.

  The Rankine cycle 20 will be described in detail. The heat absorber 54a of the first boiler 54 is connected to the discharge side of the pump chamber 43 in the gear pump 45 through the first flow path 56a. Moreover, the 1st boiler 54 is provided with the heat radiator 54b in addition to the heat absorber 54a. The radiator 54b is provided on a cooling water circulation path 57 connected to the engine Eg. On the cooling water circulation path 57, a radiator 57a is provided. And the cooling water (high temperature fluid) which cooled the engine Eg of the vehicle circulates through the cooling water circulation path 57, and radiates heat with the radiator 54b and the radiator 57a.

  In the first boiler 54, the heat absorber 55a of the second boiler 55 is connected to the discharge side of the heat absorber 54a via the connection passage 56b. The second boiler 55 includes a heat radiator 55b in addition to the heat absorber 55a. The radiator 55b is provided on an exhaust passage 58 connected to the engine Eg. The exhaust from the engine Eg is exhausted from the muffler 59 after being radiated by the radiator 55b. Therefore, the refrigerant discharged from the gear pump 45 is heated by exhaust heat from the engine Eg by heat exchange between the heat absorbers 54a and 55a of the first and second boilers 54 and 55 and the radiators 54b and 55b. .

  In the second boiler 55, a discharge port of the heat absorber 55a is connected to a suction port in the expander unit 51 via an expansion side suction flow path 56c, and is heated by the first and second boilers 54 and 55. The high-temperature and high-pressure refrigerant is introduced into the expander unit 51 through the expansion side suction flow path 56c. A condenser 53 is connected to the discharge port 16a of the expander unit 51 through an expansion-side discharge flow path 56d. The low-pressure refrigerant expanded by the expander unit 51 is discharged to the condenser 53 via the expansion-side discharge flow path 56d. A pump chamber 43 of the gear pump 45 is connected to the discharge side of the condenser 53 via a second flow path 56e.

  The refrigerant in the Rankine cycle 20 circulates through the Rankine cycle 20 by passing through the expander 51, the condenser 53, the pump chamber 43, the first boiler 54, and the second boiler 55 by the pump action of the gear pump 45. It is like that.

Next, the operation of the vehicle exhaust heat recovery system 10 will be described.
When the engine Eg of the vehicle is driven, in the first boiler 54 and the second boiler 55, the heat is exchanged between the heat absorbers 54a and 55a and the heat radiators 54b and 55b, so that the refrigerant is exhausted by the exhaust heat from the engine Eg. Heated. The high-pressure refrigerant after heating is introduced into the working chamber 49 of the expander unit 51 from the suction port (not shown) via the expansion side suction flow path 56c and expands, and the expansion unit 51 is mechanically expanded by this expansion. Outputs energy (driving force). That is, the rotor 47 is rotated by this driving force, the drive shaft 18 of the motor / generator 17 is rotated, and the gear pump 45 is driven.

  At this time, when the amount of exhaust heat from the engine Eg is large and the output from the expander unit 51 causes the drive shaft 18 to rotate beyond a predetermined rotation speed, the motor / generator 17 functions as a generator. Thus, the rotational speed of the drive shaft 18 is suppressed. Then, the output exceeding the predetermined number of revolutions is converted into electric power, and the battery 19a is charged via the inverter 19.

  The refrigerant whose pressure has been reduced after the expansion is discharged to the discharge space 52 and then discharged to the expansion-side discharge flow path 56d through the discharge port 16a. The refrigerant discharged to the expansion side discharge flow path 56d passes through the condenser 53 and is introduced into the pump chamber 43 through the second flow path 56e. Then, the refrigerant introduced into the pump chamber 43 is supplied to the first boiler 54 and the second boiler 55 by the gear pump 45 driven by the output from the expander unit 51. Therefore, the refrigerant circulates through the Rankine cycle 20 while the engine Eg is being driven.

  In a state where the refrigerant is circulating in the Rankine cycle 20, an air conditioner switch (not shown) is turned on. Then, the control unit 21 supplies power to the electromagnetic coil 28, connects the first clutch plate 26 and the second clutch plate 27, connects the drive shaft 18 and the compressor shaft 22, and the compressor unit 31 is driven. The When the drive shaft 18 and the compressor shaft 22 are connected, the rotational speed of the motor / generator 17 tends to decrease due to the load caused by the connection. At this time, in order to satisfy the air conditioner request, in order to rotate the compressor shaft 22 at the requested number of revolutions, the control unit 21 supplies power from the battery 19a to the motor / generator 17 via the inverter 19, and the motor / generator 17 is turned on. It functions as an electric motor.

  Then, the drive shaft 18 is rotated by the driving force of the motor / generator 17, and the compressor unit 31 is rotated at a rotation speed for satisfying the air conditioner request, thereby driving the compressor unit 31. That is, when the compressor unit 31 is driven, part of the required power is borne by the motor / generator 17. When the compressor unit 31 is able to rotate at a rotation speed for satisfying the air conditioner request by the output from the expander unit 51, the control unit 21 stops supplying power to the motor / generator 17, and then the compressor The unit 31 is driven by the output from the expander unit 51.

  When the compressor unit 31 is driven, the movable scroll 34 turns with respect to the fixed scroll 36 and the refrigerant is sucked into the first accommodation space 15a from the compression side suction flow path R3 through the suction hole 13b. Since the refrigerant sucked into the first accommodation space 15a flows from the partition wall 15 side toward the partition forming portion 13a side (compressor portion 31 side) in the first accommodation space 15a, the refrigerant spans the entire first accommodation space 15a. Then, the refrigerant spreads, and the entire motor / generator 17 is cooled by this refrigerant.

  The refrigerant that has flowed toward the partition forming portion 13a in the first housing space 15a flows into the third housing space 15c through the communication hole 13c, and is sucked into the suction chamber S of the compressor portion 31 across the electromagnetic clutch 29. Is done. The entire electromagnetic clutch 29 is cooled by the refrigerant that crosses the electromagnetic clutch 29.

  Furthermore, the refrigerant in the working chamber 37 is compressed as the movable scroll 34 turns. Then, when the refrigerant compressed in the working chamber 37 of the compressor unit 31 is compressed to a predetermined pressure, the refrigerant is pushed away from the discharge valve 38 and discharged from the discharge port 36 c to the discharge chamber 39. Further, the compressed refrigerant is discharged to the condenser C through the compression-side discharge flow path R1, condensed by the condenser C, and then decompressed by the expansion valve V. Further, the refrigerant that has passed through the expansion valve V is vaporized by the evaporator E, and is refluxed from the compression side suction flow path R3 to the first accommodation space 15a via the check valve G through the suction hole 13b.

  When the air conditioner switch is turned off or there is no request for driving the compressor unit 31 by the air conditioner, the control unit 21 stops energization of the electromagnetic coil 28 and connects the first clutch plate 26 and the second clutch plate 27. Release the state. Then, the drive of the compressor part 31 is stopped.

In the above embodiment, the following effects can be obtained.
(1) A suction hole 13 b is formed at a position corresponding to the first accommodation space 15 a on the peripheral wall of the center housing 13. Therefore, the refrigerant circulated through the refrigeration cycle 30 can be sucked into the compressor unit 31 from the suction hole 13b through the first accommodation space 15a, and the motor / generator 17 can be cooled by the low-temperature refrigerant. The first housing space 15a in which the motor / generator 17 is housed is separated from the second housing space 15b in which the expander section 51 is housed by the partition wall portion 15, and thus is sucked into the first housing space 15a. The refrigerant is less likely to receive heat from the expander unit 51, and the motor / generator 17 can be efficiently cooled by the refrigerant in the first accommodation space 15a. As a result, the cooling efficiency of the motor / generator 17 can be improved as compared with the case where the motor / generator 17 is cooled by the refrigerant warmed by the heat of the expander unit 51.

  (2) In the center housing 13, the suction hole 13 b is formed closer to the partition wall 15 side than the communication hole 13 c (compressor unit 31) side, and is formed at a position adjacent to the partition wall 15. Therefore, the refrigerant sucked into the first accommodation space 15a from the suction hole 13b flows from the partition portion 15 side toward the partition forming portion 13a side in the first accommodation space 15a. Therefore, the refrigerant spreads over the entire first accommodation space 15a, and the entire motor / generator 17 can be cooled by this refrigerant.

  (3) The electromagnetic clutch 29 is provided between the compressor unit 31 and the motor / generator 17 in the housing 12. Therefore, since the refrigerant sucked into the first accommodation space 15a from the suction hole 13b flows so as to cross the motor / generator 17 and the electromagnetic clutch 29 toward the compressor unit 31, the refrigerant adds to the motor / generator 17 by this refrigerant. The entire electromagnetic clutch 29 can also be cooled.

In addition, you may change the said embodiment as follows.
In the embodiment, in the housing 12, the compressor unit 31, the electromagnetic clutch 29, the motor generator 17, and the expander unit 51 are arranged from the front side to the rear side along the axial direction of the drive shaft 18 and the compressor shaft 22. Although arranged in order, it is not limited to this. For example, in the housing 12, the motor / generator 17, the compressor unit 31, and the expander unit 51 may be arranged in parallel in the order from the front side to the rear side along the axial direction of the drive shaft 18 and the compressor shaft 22. Good. In this case, the compressor section 31 is configured as a vane type, the compressor shaft 22 of the compressor section 31 is formed in a hollow shape, the drive shaft 18 is inserted, and one clutch plate is fixed to the front end of the compressor shaft 22. At the same time, the other clutch plate is fixed to the outer periphery of the drive shaft 18 so as to face the one clutch plate. Therefore, by controlling the energization to the electromagnetic coil 28 between the compressor unit 31 and the motor / generator 17, the one clutch plate and the other clutch plate are attracted or separated, and the drive shaft 18 is separated. An electromagnetic clutch 29 is provided as switching means for switching between the compressor shaft 22 and the compressor shaft 22 between a connected state and a disconnected state. In this case, the partition wall 15 is provided between the compressor unit 31 and the expander unit 51 or between the motor / generator 17 and the compressor unit 31.

  In the embodiment, the switching means is an electromagnetic clutch of a type that attracts the first clutch plate 26 fixed to the compressor shaft 22 and the second clutch plate 27 fixed to the drive shaft 18 by excitation of the electromagnetic coil 28. However, the present invention is not limited to this. For example, a spring clutch or another type of electromagnetic clutch may be used.

  In the embodiment, the suction hole 13b is formed at a position corresponding to the first accommodation space 15a on the peripheral wall of the center housing 13 and adjacent to the partition wall 15. However, the present invention is not limited to this. The formation position of the suction hole 13b is not particularly limited as long as the position corresponds to the first accommodation space 15a on the peripheral wall of the housing 13.

  In embodiment, the compressor part 31 is not restricted to the type comprised by the movable scroll 34 and the fixed scroll 36, For example, a piston type, a vane type, etc. may be sufficient.

In the embodiment, the expander unit 51 is not limited to the vane type, and may be another type of compression mechanism.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

  (A) The switching means is an electromagnetic clutch that attracts a first clutch plate fixed to the compressor shaft and a second clutch plate fixed to the drive shaft by excitation of an electromagnetic coil. The composite fluid machine according to claim 3.

  (B) The suction hole is formed at a position adjacent to the partition wall, and the composite according to any one of claims 1 to 3 and the technical idea (a) Fluid machinery.

  DESCRIPTION OF SYMBOLS 12 ... Housing, 13b ... Suction hole, 15 ... Partition part, 15a ... 1st accommodation space, 15b ... 2nd accommodation space, 17 ... Motor generator as a rotary electric machine part, 18 ... Drive shaft, 22 ... Compressor shaft, 29 ... Electromagnetic clutch as switching means, 31 ... compressor part, 51 ... expander part.

Claims (3)

An expander that outputs mechanical energy by the expansion of the Rankine cycle working fluid;
A compressor for compressing the working fluid for the refrigeration cycle;
A rotating electrical machine part that functions as a generator or an electric motor, and a housing,
In the housing, the compressor unit, the rotating electrical machine unit, and the expander unit are arranged in parallel,
The housing is provided with a partition portion that separates a first housing space in which the rotating electrical machine portion is housed and a second housing space in which the expander portion is housed, and the working fluid for the refrigeration cycle, A composite fluid machine, wherein a suction hole for sucking into the compressor section through the first housing space is formed at a position corresponding to the first housing space. In the housing, the compressor unit, the rotating electrical machine unit, and the expander unit are arranged in this order along the axial direction of the drive shaft of the rotating electrical machine unit and the compressor shaft of the compressor unit,
2. The composite fluid machine according to claim 1, wherein the suction hole is formed closer to the partition wall than the compressor unit in the axial direction.   In the housing, switching means for switching the drive shaft of the rotating electrical machine part and the compressor shaft of the compressor part to a connected state or a disconnected state is provided between the compressor part and the rotating electrical machine part. The composite fluid machine according to claim 1, wherein the composite fluid machine is provided.

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