Composite device

Abstract

According to the present invention, a composite device has a refrigerant compression function and a heat medium heating function. The inside of a housing 2 of the composite device is partitioned into a first accommodation space S1 that accommodates an electric motor 4 and a compression mechanism 3 that compresses a refrigerant, a second accommodation space S2 that accommodates an electric heater 5 that heats a heat medium, and a third accommodation space S3 that accommodates a motor drive circuit 20 that controls the electric motor 4 and a heater control circuit 30 that controls the electric heater 5. The refrigerant compressed by the compression mechanism 3 flows through the first accommodation space S1, and the heat medium flows through the second accommodation space S2. First power switching elements Q1–Q6 of the motor drive circuit 20 and second power switching elements Q7, Q8 of the heater control circuit 30 are arranged at positions in the third accommodation space S3 that correspond to the first accommodation space S1.

Description

[Technical field]

[0001] The present invention relates to a composite device having a refrigerant compressing function and a heat medium heating function. [Background technology]

[0002] Patent Document 1 describes a vehicle air conditioner that can be applied to vehicles such as hybrid cars and electric cars. The vehicle air conditioner described in Patent Document 1 has a refrigerant circuit including an electric compressor that compresses a refrigerant, a radiator that radiates heat from the refrigerant discharged from the electric compressor to heat the air supplied to the vehicle interior, an expansion valve that reduces the pressure and expands the refrigerant that has been radiated with heat, and a heat exchanger that corresponds to an evaporator that exchanges heat between the reduced-pressure expanded refrigerant and the outside air. In addition, the vehicle air conditioner described in Patent Document 1 has a heat medium heating electric heater that heats the heat medium to assist the heating of the vehicle interior by the radiator, and a heat medium-air heat exchanger that heats the air supplied to the vehicle interior with the heated heat medium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-213765 A Summary of the Invention [Problem to be solved by the invention]

[0004] The vehicle air conditioning device described in Patent Document 1 can compensate for the lack of heating capacity due to the radiator. However, in the vehicle air conditioning device described in Patent Document 1, the electric compressor, the heat medium heating electric heater, and the like are provided separately. This makes the entire device larger, and there is room for improvement in terms of installation space, etc.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a composite device that can contribute to the miniaturization of vehicle air conditioning devices and the like.

[0006] Another object of the present invention is to provide a composite device that can effectively cool (dissipate heat) electronic components (hereinafter referred to as "heat-generating components") that become relatively hot during use, such as power switching elements used to control and supply electric power. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a composite device having a refrigerant compression function and a heat medium heating function. The composite device includes, in a housing, a compression mechanism for compressing a refrigerant, an electric motor for driving the compression mechanism, a motor drive circuit for controlling the electric motor, an electric heater for heating a heat medium, and a heater control circuit for controlling the electric heater. The housing is partitioned into a first storage space that houses the compression mechanism and the electric motor and through which the refrigerant compressed by the compression mechanism flows, a second storage space that houses the electric heater and through which the heat medium flows, and a third storage space that houses the motor drive circuit and the heater control circuit.

[0008] Preferably, a heat-generating component of the motor drive circuit (hereinafter referred to as a "first heat-generating component") and a heat-generating component of the heater control circuit (hereinafter referred to as a "second heat-generating component") are arranged at a position corresponding to the first accommodating space within the third accommodating space. Effect of the Invention

[0009] According to the present invention, it is possible to provide a composite device that can contribute to the miniaturization of vehicle air conditioning devices and the like.

[0010] Furthermore, according to the present invention, it is possible to provide a composite device capable of effectively cooling (dissipating heat) heat-generating components. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a front view of the multifunction device according to the embodiment. [Diagram 2] FIG. 2 is a right side view of the multifunction peripheral according to the embodiment. [Diagram 3] FIG. 2 is a top view of the multifunction peripheral according to the embodiment. [Figure 4] 2 is a diagram illustrating an example of the configuration of a main part of a motor drive circuit of the multifunction peripheral according to the embodiment. FIG. [Diagram 5] 2 is a diagram illustrating an example of the configuration of a main part of a heater control circuit of the multifunction peripheral according to the embodiment; FIG [Figure 6] 1 is a schematic partial cross-sectional view of a composite apparatus according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0013] 1 to 3 show a schematic configuration of a compound device 1 according to an embodiment of the present invention. Fig. 1 is a front view of the compound device 1 according to the embodiment, Fig. 2 is a right side view of the compound device 1 according to the embodiment, and Fig. 3 is a top view of the compound device 1 according to the embodiment.

[0014] The composite device 1 has a refrigerant compression function for compressing a refrigerant and a heat medium heating function for heating a heat medium. In other words, the composite device 1 has a configuration in which a compressor and a heat medium heating device are integrated. The composite device 1 can be applied to, for example, the vehicle air conditioning device described above.

[0015] When the combined device 1 is applied to a vehicle air conditioner, the refrigerant compression function unit of the combined device 1 can be incorporated into a refrigerant circuit in the vehicle air conditioner, and configured to compress the refrigerant that has passed through an expansion valve and a heat exchanger equivalent to an evaporator, and to supply the compressed refrigerant to a radiator (refrigerant-air heat exchanger) that heats the air to be supplied into the vehicle cabin. The heat medium heating function unit of the combined device 1 can be incorporated into a heat medium circuit in which a heat medium is circulated by a pump or the like, and configured to heat the heat medium and supply the heated heat medium to a heat medium-air heat exchanger that heats the air to be supplied into the vehicle cabin. The refrigerant and heat medium can be selected arbitrarily, but water (including water mixed with antifreeze, etc.) is usually used as the heat medium.

[0016] 1 to 3, in this embodiment, the housing 2 of the composite device 1 includes a first housing 2A, a second housing 2B, a third housing 2C, a first cover 2D, a second cover 2E, and a third cover 2F, which are integrally fastened together by fastening members such as bolts not shown.

[0017] The first housing 2A is formed in a substantially cylindrical shape. The first housing 2A accommodates a compression mechanism 3 that compresses a refrigerant and an electric motor 4 that drives the compression mechanism 3. These are arranged in series in the axial direction. Although not particularly limited, the compression mechanism 3 may be a scroll compression mechanism including a fixed scroll and a movable (orbiting) scroll. In addition, an output shaft 4a of the electric motor 4 is connected to the compression mechanism 3 (for example, the movable (orbiting) scroll).

[0018] One open end (the lower side in Figs. 1 and 2) of the first housing 2A, i.e., the open end of the first housing 2A on the compression mechanism 3 side, is closed by a first cover 2D. The first housing 2A can also be called a compressor housing.

[0019] The second housing 2B is disposed to the side of the first housing 2A and is formed in a generally rectangular tubular shape. An electric heater 5 for heating a heat medium is accommodated in the second housing 2B. Although not particularly limited, in this embodiment, the electric heater 5 is configured as a pair of heaters (heater 5A, heater 5B) disposed in parallel in the second housing 2B and electrically connected in parallel.

[0020] One open end (the lower end in Figs. 1 and 2) of the second housing 2B is closed by a second cover 2E. The second housing 2B can also be called a heater housing.

[0021] The third housing 2C is formed in a box shape with an open top. A motor drive circuit 20 that controls the electric motor 4 and a heater control circuit 30 that controls the electric heater 5 are accommodated in the third housing 2C. Specifically, a circuit board (also called a control board) 6 on which the motor drive circuit 20 and the heater control circuit 30 are mounted is accommodated in the third housing 2C.

[0022] The bottom wall 7 of the third housing 2C closes the other open end (upper side in Figs. 1 and 2) of the first housing 2A, i.e., the open end of the first housing 2A on the electric motor 4 side, and the other open end (upper side in Figs. 1 and 2) of the second housing 2B. This separates the first housing 2A from the third housing 2C, and separates the second housing 2B from the third housing 2C. In other words, the bottom wall 7 of the third housing 2C constitutes the inner wall of the housing 2, and has a first partition 71 that separates the first housing 2A from the third housing 2C, and a second partition 72 that separates the second housing 2B from the third housing 2C.

[0023] The top surface (open end) of the third housing 2C is closed by a third cover 2F. The third housing 2C can also be called a circuit (board) housing.

[0024] In other words, in this embodiment, the housing 2 of the combination device 1 has a first accommodating space S1 formed in the internal space of the first housing 2A and accommodating the compression mechanism 3 and the electric motor 4, a second accommodating space S2 formed in the internal space of the second housing 2B and accommodating the electric heater 5 (heater 5A, heater 5B), and a third accommodating space S3 formed in the internal space of the third housing 2C and accommodating the motor driving circuit 20 and the heater control circuit 30 (specifically, the circuit board 6 on which these are mounted).

[0025] Here, the first storage space S1 and the second storage space S2 are separated from each other. The first storage space S1 and the third storage space S3 are separated by a first partition 71 of the bottom wall 7 of the third housing 2C, and the second storage space S2 and the third storage space S3 are separated by a second partition 72 of the bottom wall 7 of the third housing 2C. In other words, the inside of the housing 2 of the composite device 1 is divided into the first storage space S1 that accommodates the compression mechanism 3 and the electric motor 4, the second storage space S2 that accommodates the electric heater 5, and the third storage space S3 that accommodates the motor drive circuit 20 and the heater control circuit 30.

[0026] The first housing space S1 and the third housing space S3 are adjacent to each other with the first partition portion 71 in between, and the second housing space S2 and the third housing space S3 are adjacent to each other with the second partition portion 72 in between. The third housing space S3 is disposed in the axial direction of the electric motor 4 with respect to the first housing space S1 and the second housing space S2. Specifically, the third housing space S3 is disposed on the opposite side to the first housing space S1 and the second housing space S2 in the axial direction of the electric motor 4 with the bottom wall 7 (i.e., the first partition portion 71 and the second partition portion 72) of the third housing 2C in between.

[0027] The first housing 2A is formed with a refrigerant inlet 8 for allowing the refrigerant from the outside to flow into the first storage space S1. The refrigerant from the outside is, for example, a refrigerant that has passed through a heat exchanger corresponding to an expansion valve and an evaporator in the refrigerant circuit of the vehicle air conditioner described above, that is, a low-temperature, low-pressure refrigerant. In this embodiment, the refrigerant inlet 8 is provided in a portion of the first housing 2A on the third housing 2C side, that is, in the vicinity of the first partition portion 71 that separates the first storage space S1 and the third storage space S3. Preferably, the refrigerant inlet 8 is configured to allow the refrigerant from the outside to flow into the first storage space S1 so that at least a part of the refrigerant from the outside flows along the first partition portion 71.

[0028] The refrigerant that flows into the first storage space S1 flows through the first storage space S1, and is then sucked into the compression mechanism 3. The first partition portion 71 is cooled by the refrigerant that flows into the first storage space S1, and the first storage space S1 is cooled by the refrigerant that flows through the first storage space S1.

[0029] The refrigerant drawn into the compression mechanism 3 is compressed by the compression mechanism 3. Then, the refrigerant becomes a high-temperature, high-pressure refrigerant and is discharged from the compression mechanism 3. The discharged (high-temperature, high-pressure) refrigerant flows out from a refrigerant outlet 9 formed in the first housing 2A and is supplied to, for example, a radiator (refrigerant-air heat exchanger) that heats the air supplied to the vehicle cabin in the refrigerant circuit of the above-mentioned vehicle air conditioning device. In this embodiment, the refrigerant outlet 9 is provided in a portion of the first housing 2A on the first cover 2D side.

[0030] On the other hand, the second housing 2B is formed with a heat medium inlet 10 for allowing the heat medium from the outside to flow into the second accommodation space S2. The heat medium from the outside is, for example, a heat medium that has passed through a heat medium-air heat exchanger for heating air supplied to the vehicle cabin in the heat medium circuit of the vehicle air conditioning device described above. In this embodiment, the heat medium inlet 10 is provided in a portion of the second housing 2B on the third housing 2C side, that is, in the vicinity of the second partition portion 72 that separates the second accommodation space S2 and the third accommodation space S3. Preferably, the heat medium inlet 10 is configured to allow the heat medium from the outside to flow into the second accommodation space S2 so that at least a part of the heat medium from the outside flows along the second partition portion 72.

[0031] The heat medium that has flowed into the second accommodation space S2 flows through the second accommodation space S2, and is heated by the electric heater 5 (heater 5A, heater 5B) during this process.

[0032] The heat medium heated by the electric heater 5 (heater 5A, heater 5B) flows out from a heat medium outlet 11 formed in the second housing 2B and is supplied to, for example, a heat medium-air heat exchanger for heating air supplied to the vehicle cabin in the above-mentioned vehicle air conditioning device. In this embodiment, the heat medium outlet 11 is provided in a portion of the second housing 2B on the second cover 2E side.

[0033] Although not shown in the figure, the power supply line from the motor drive circuit 20 to the electric motor 4 and the power supply line from the heater control circuit 30 to the electric heater 5 each extend through the bottom wall 7 of the third housing 2C in an airtight and liquid-tight manner.

[0034] Next, the motor drive circuit 20 that controls the electric motor 4 and the heater control circuit 30 that controls the electric heater 5 will be described.

[0035] 4 is a diagram showing an example of the configuration of a main part of the motor drive circuit 20. In this embodiment, the motor drive circuit 20 is configured to convert a DC voltage from an external power supply into a three-phase AC voltage and supply it to the electric motor 4. The motor drive circuit 20 has a capacitor 21, a first power module 22, and a first power module control circuit 23.

[0036] The capacitor 21 is connected between the power supply line of the external power supply and the ground line, and smoothes the DC voltage from the external power supply.

[0037] The first power module 22 includes six power switching elements (hereinafter referred to as "first power switching elements") Q1-Q6 that control the supply of current to the electric motor 4, and six diodes D1-D6. Although not particularly limited, the first power switching elements Q1-Q6 may be IGBTs (insulated gate bipolar transistors). By controlling (PMW control) the first power switching elements Q1-Q6, the first power module 22 converts the DC voltage from the external power supply smoothed by the capacitor 21 into a three-phase AC voltage and supplies it to the electric motor 4.

[0038] Specifically, the first power module 22 has a U-phase arm, a V-phase arm, and a W-phase arm that are provided in parallel with each other between a power supply line of an external power supply and a ground line.

[0039] In the U-phase arm, two first power switching elements Q1, Q2 are connected in series, and diodes D1, D2 are connected in anti-parallel to each of the first power switching elements Q1, Q2, respectively.

[0040] In the V-phase arm, two first power switching elements Q3, Q4 are connected in series, and diodes D3, D4 are connected in anti-parallel to each of the first power switching elements Q3, Q4, respectively.

[0041] Two first power switching elements Q5, Q6 are connected in series in the W-phase arm, and diodes D5, D6 are connected in anti-parallel to each of the first power switching elements Q5, Q6, respectively.

[0042] Further, the midpoints of the U-, V-, and W-phase arms are connected at one end to the other end of the star-connected U-, V-, and W-phase coils of the electric motor 4. That is, the midpoints of the first power switching elements Q1 and Q2 of the U-phase arm are connected to the U-phase coil, the midpoints of the first power switching elements Q3 and Q4 of the V-phase arm are connected to the V-phase coil, and the midpoints of the first power switching elements Q5 and Q6 of the W-phase arm are connected to the W-phase coil.

[0043] Therefore, by controlling the ratio between the ON period of the first power switching element on the power line side of each phase arm and the ON period of the first power switching element on the ground line side, the first power module 22 can convert the DC voltage from the external power source smoothed by the capacitor 21 into a three-phase AC voltage and supply it to the electric motor 4, thereby driving the electric motor 4.

[0044] The first power module control circuit 23 controls (PWM control) the first power switching elements Q1-Q6 to drive the electric motor 4 and ultimately the compression mechanism 3 based on a control signal from an external control device (for example, the control device of the above-mentioned vehicle air conditioner).

[0045] 5 is a diagram showing an example of the configuration of a main part of the heater control circuit 30. In this embodiment, the heater control circuit 30 is configured to apply a voltage from a high-voltage power supply to the electric heater 5 (heater 5A, heater 5B). The heater control circuit 30 has a second power module 31 and a second power module control circuit 32.

[0046] The second power module 31 includes two power switching elements (hereinafter referred to as "second power switching elements") Q7, Q8 that control the supply of electricity to the electric heater 5. Although not particularly limited, the second power switching elements Q7, Q8 may be IGBTs, similar to the first power switching elements Q1 to Q6 of the motor drive circuit 20. In this embodiment, of the two second power switching elements Q7, Q8, one second power switching element Q7 is provided on the output side (voltage side) of the high voltage power supply relative to the electric heater 5, and the other second power switching element Q is provided on the ground side of the high voltage power supply relative to the electric heater 5. The second power module 31 turns on / off the supply of electricity to the electric heater 5 by controlling (PMW control) the second power switching elements Q7, Q8, thereby making it possible to control the temperature of the electric heater 5 and further the temperature of the heat medium heated by the electric heater 5.

[0047] The second power module control circuit 32 controls (PWM control) the second power switching elements Q7, Q8 based on a control signal from an external control device (for example, the control device of the above-mentioned vehicle air conditioner).

[0048] 5, the heater control circuit 30 is provided with a first temperature detection unit that detects the temperatures of the second power switching elements Q7, Q8, a second temperature detection unit that detects the temperature of the electric heater 5 (including the temperature of the heat medium heated by the electric heater 5), a voltage detection unit that detects the voltage applied to the electric heater 5, and a current detection unit that detects the current flowing through the second power switching elements Q7, Q8 and the electric heater 5, for the purpose of overheat protection, etc. The detection results of these detection units can be input to, for example, an external control device and used to determine a control signal to the second power module control circuit 32.

[0049] For example, the external control device outputs a control signal to the second power module control circuit 32 to forcibly turn off the second power switching elements Q7, Q8 when the temperature of the second power switching elements Q7, Q8 exceeds a predetermined value, when the temperature of the electric heater 5 exceeds a predetermined value, when the voltage applied to the electric heater 5 exceeds a predetermined value, or when the current flowing through the second power switching elements Q7, Q8 and the electric heater 5 exceeds a predetermined value.

[0050] Next, the arrangement of the first power switching elements Q1-Q6 of the motor drive circuit 20 and the second power switching elements Q7, Q8 of the heater control circuit 30 in the composite device 1 according to the embodiment will be described with reference to Fig. 6. Fig. 6 is a partial schematic cross-sectional view of the composite device 1 (corresponding to the AA cross-sectional view in Fig. 3).

[0051] As described above, the motor drive circuit 20 and the heater control circuit 30 are mounted on the circuit board 6 and housed in the third housing space S3. The circuit board 6 is attached to, for example, a plurality of board attachment portions 12 provided in the third housing space S3, as shown in Fig. 6. In this embodiment, each of the plurality of board attachment portions 12 is formed in a boss shape protruding upward (in a direction away from the first housing 2A and the second housing 2B) from the bottom wall 7 of the third housing 2C, and the circuit board 6 is attached to the upper surface of the plurality of board attachment portions 12 with screws 13.

[0052] The first power switching elements Q1-Q6 of the motor drive circuit 20 and the second power switching elements Q7, Q8 of the heater control circuit 30 are disposed at positions corresponding to the first accommodation space S1 in the third accommodation space S3. Specifically, in this embodiment, the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 are mounted on the lower surface (the surface on the bottom wall 7 side of the third housing 3C) of the circuit board 6 accommodated in the third accommodation space S3, at a portion facing the first partition portion 71 that partitions the first accommodation space S1 and the third accommodation space S3.

[0053] In this embodiment, the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 are arranged so as to be in thermal contact with the first partition portion 71, for example, by appropriately adjusting the length of each lead and / or by forming a part of the bottom wall 7 of the third housing 2C to protrude upward. Here, "thermal contact with the first partition portion 71" refers to a state in which heat exchange with the first partition portion 71 is possible, and includes not only direct contact with the first partition portion 71, but also being sufficiently close to the first partition portion 71 and indirect contact with the first partition portion 71 via a heat exchange member with high thermal conductivity.

[0054] The composite device 1 according to the embodiment provides the following advantages.

[0055] The combined device 1 has, within a housing 2, a compression mechanism 3 that compresses a refrigerant, an electric motor 4 that drives the compression mechanism 3, a motor drive circuit 20 that controls the electric motor 4, an electric heater 5 that heats a heat medium, and a heater control circuit 30 that controls the electric heater 5. The housing 2 of the combined device 1 is partitioned into a first storage space S1 that accommodates the compression mechanism 3 and the electric motor 4 and through which the (low temperature, low pressure) refrigerant compressed by the compression mechanism 3 flows, a second storage space S2 that accommodates the electric heater 5 and through which the heat medium flows, and a third storage space S3 that accommodates the motor drive circuit 20 and the heater control circuit 30.

[0056] Such a combined device 1 functions as an electric compressor and a heat medium heating device, and can heat the heat medium while compressing the refrigerant. Therefore, the combined device 1 can be applied to the vehicle air conditioning device described above. By applying the combined device 1 to the vehicle air conditioning device, it is possible to reduce the size of the vehicle air conditioning device compared to a conventional configuration having an electric compressor and a heat medium heating device separately.

[0057] Here, the third housing space S3 is disposed in the axial direction of the electric motor 4 with respect to the first housing space S1 and the second housing space S2. This makes it possible to suppress an increase in the dimension of the housing 2 in a direction perpendicular to the axial direction of the electric motor 4, i.e., an increase in the body of the housing 2. This also makes it possible to suppress a decrease in the ease of installation of the composite device 1.

[0058] The motor drive circuit 20 includes first power switching elements Q1-Q6 that control the energization of the electric motor 4, and the heater control circuit 30 includes second power switching elements Q7, Q8 that control the energization of the electric heater 5. The first power switching elements Q1-Q6 of the motor drive circuit 20 and the second power switching elements Q7, Q8 of the heater control circuit 30 are disposed at positions corresponding to the first accommodation space S1 in the third accommodation space S3. Specifically, the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 are mounted on a circuit board 6 accommodated in the third accommodation space S3 at a portion facing a first partition portion 71 that separates the first accommodation space S1 and the third accommodation space S3. A (low temperature, low pressure) refrigerant compressed by the compression mechanism 3 flows into the first accommodation space S1. Therefore, the (low temperature and low pressure) refrigerant compressed in the compression mechanism 3 and the first partition portion 71 that can be cooled by the refrigerant can be easily used to cool the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q8.

[0059] Particularly in this embodiment, the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 are arranged so as to be in thermal contact with the first partition portion 71 that separates the first accommodation space S1 and the third accommodation space S3. Therefore, the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 can be cooled by heat exchange between the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 and the first partition portion 71 that can be cooled by the refrigerant, improving the cooling (heat dissipation) performance of the power switching elements.

[0060] On the other hand, the refrigerant compressed in the compression mechanism 3 is warmed by the heat of the first power switches Q1-Q6 and the second power switches Q7, Q8 and thereby dries, so that the durability of the compression mechanism 3 is improved.

[0061] Furthermore, in this embodiment, a refrigerant inlet 8 for allowing the (low temperature, low pressure) refrigerant from the outside to be compressed by the compression mechanism 3 to flow into the first accommodation space S1 is provided near the first partition portion 71. Therefore, the first partition portion 71 is stably cooled by the refrigerant flowing into the first accommodation space S1 from the outside, and / or the first partition portion 71 is maintained in a low temperature state. Therefore, the first power switching elements Q1-Q6 and the second power switching elements Q7, Q8 can be more effectively cooled by using the first partition portion 71, and the cooling (heat dissipation) performance of the power switching elements is further improved.

[0062] In the above embodiment, the motor drive circuit 20 and the heater control circuit 30 are mounted on one circuit board 6. However, this is not limited to the above. As long as the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q8 are disposed in a position corresponding to the first housing space S1 in the third housing space S3, mounted in a position facing the first partition portion 71 on the circuit board, and / or disposed so as to be in thermal contact with the first partition portion 71, the motor drive circuit 20 and the heater control circuit 30 may be mounted on separate circuit boards. Alternatively, the motor drive circuit 20 and / or the heater control circuit 30 may be mounted on a plurality of circuit boards in a divided manner, and the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q8 may be mounted on one of the circuit boards.

[0063] In the above embodiment, all of the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q8 are disposed at positions corresponding to the first housing space S1. However, this is not limited to this. It is sufficient that most of the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q are disposed at positions corresponding to the first housing space S1, and some of the power switching elements may be disposed at positions slightly away from the positions corresponding to the first housing space S1. In other words, it is not necessary that the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q8 are disposed at positions strictly corresponding to the first housing space S1, and it is sufficient that the first power switching elements Q1 to Q6 and the second power switching elements Q7, Q8 are disposed at positions generally corresponding to the first housing space S1.

[0064] In the above embodiment, the first power switching elements Q1 to Q6 of the motor drive circuit 20 and the second power switching elements Q7, Q8 of the heater control circuit 30 are disposed in positions corresponding to the first housing space S1 in the third housing space S3, are mounted in a position facing the first partition portion 71 on the circuit board, and / or are disposed so as to be in thermal contact with the first partition portion 71. However, this is not limited to this. In addition to or instead of the first power switching elements Q1 to Q6, other heat-generating components (e.g., resistors) of the motor drive circuit 20 may be disposed in positions corresponding to the first housing space S1 in the third housing space S3, are mounted in a position facing the first partition portion 71 on the circuit board, and / or are disposed so as to be in thermal contact with the first partition portion 71. Similarly, in addition to or instead of the second power switching elements Q7, Q8, other heat-generating components (e.g., resistors) of the heater control circuit 30 may be arranged at a position corresponding to the first accommodating space S1 in the third accommodating space S3, mounted at a position facing the first partition portion 71 on the circuit board, and / or arranged so as to be in thermal contact with the first partition portion 71.

[0065] In the above embodiment, the third housing 2C (third housing space S3) is located above the first housing 2A (first housing space S1) and the second housing 2B (second housing space S2). However, the orientation of the multifunction device 1 when the multifunction device 1 is installed can be set arbitrarily, and for example, the multifunction device 1 can be installed in a state where the third housing 2C (third housing space S3) is located to the side of the first housing 2A (first housing space S1) and the second housing 2B (second housing space S2).

[0066] In the above, the case where the composite device 1 is mainly applied to a vehicle air conditioning device has been described. However, the present invention is not limited to this. The composite device 1 can be applied to various devices and systems that use an electric compressor that compresses a refrigerant and a heat medium heating device that heats a heat medium.

[0067] Although the embodiments and some modified examples of the present invention have been described above, the present invention is not limited to the above-described embodiments and modified examples, and it goes without saying that further modifications and changes are possible based on the technical concept of the present invention. [Explanation of symbols]

[0068] Reference Signs List 1...compound device, 2...housing, 2A...first housing, 2B...second housing, 2C...third housing, 2D...first cover, 2E...second cover, 2F...third cover, 3...compression mechanism, 4...electric motor, 5...electric heater, 6...circuit board, 7...bottom wall (inner wall) of third housing, 8...refrigerant inlet, 9...refrigerant outlet, 10...heat medium inlet, 11...heat medium outlet, 20...motor drive circuit, 30...heater control circuit, 71...first partition, 72...second partition, Q1 to Q6...first power switching element (heat generating component), Q7, Q8...second power switching element (heat generating component), S1...first storage space, S2...second storage space, S3...third storage space

Claims

1. A composite device having a refrigerant compression function and a heat medium heating function, The compressor includes a compression mechanism that compresses a refrigerant, an electric motor that drives the compression mechanism, a motor drive circuit that controls the electric motor, an electric heater that heats a heat medium, and a heater control circuit that controls the electric heater, the compressor is provided in a housing. The housing is partitioned into at least a first storage space that accommodates the compression mechanism and the electric motor and through which a refrigerant compressed by the compression mechanism flows, a second storage space that accommodates the electric heater and through which a heat medium flows, and a third storage space that accommodates the motor drive circuit and the heater control circuit. Composite device.

2. 2. The composite apparatus according to claim 1, wherein a heat generating component of the motor drive circuit and a heat generating component of the heater control circuit are disposed in a position in the third accommodation space corresponding to the first accommodation space.

3. the heat generating component of the motor drive circuit includes a first power switching element that controls power supply to the electric motor, the heat generating component of the heater control circuit includes a second power switching element that controls power supply to the electric heater; The composite device according to claim 2 .

4. 3. The composite device according to claim 2, wherein the heat generating components of the motor drive circuit and the heat generating components of the heater control circuit are mounted on a circuit board accommodated in the third accommodating space at a portion facing a partition portion that separates the first accommodating space and the third accommodating space.

5. 3. The composite apparatus according to claim 2, wherein the heat generating components of the motor drive circuit and the heat generating components of the heater control circuit are arranged so as to be in thermal contact with a partition that separates the first accommodation space and the third accommodation space.

6. The compound device according to claim 5 , wherein the housing has a refrigerant inlet adjacent to the partition portion through which the refrigerant compressed by the compression mechanism flows into the first accommodating space.

7. The housing includes: an inner wall having a first partition portion that separates the first storage space from the third storage space and a second partition portion that separates the second storage space from the third storage space; a refrigerant inlet provided near the first partition portion and allowing a refrigerant compressed by the compression mechanism to flow into the first storage space; a heat medium inlet provided in the vicinity of the second partition portion and configured to allow the heat medium to flow into the second storage space, 2. The composite apparatus according to claim 1, wherein a heat generating component of the motor drive circuit and a heat generating component of the heater control circuit are disposed so as to be in thermal contact with the first partition portion.

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