JP4884841B2 - Inverter-integrated electric compressor - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an inverter-integrated electric compressor that is configured by installing an inverter circuit inside an inverter box provided on the outer periphery of a compressor housing, and is particularly suitable for use in a vehicle air conditioner.

In recent years, in addition to automobiles driven by internal combustion engines, development and introduction of vehicles that use electric power, such as electric cars, hybrid cars, and fuel cell cars, are rapidly progressing. . Many of the air conditioners for automobiles powered by electricity use an electric compressor using an electric motor powered by electricity as a drive source for a compressor that compresses and sends out refrigerant.
In addition, in an air conditioner for an automobile that is driven by an internal combustion engine, instead of a compressor that is driven via an electromagnetic clutch by an internal combustion engine for traveling, in order to improve a decrease in drivability due to the intermittent connection of the electromagnetic clutch, Some use an electric compressor.

As such an electric compressor, a hermetic electric compressor in which a compression mechanism and an electric motor are integrally incorporated in a housing is adopted, and furthermore, electric power input from a power source is supplied to the electric motor via an inverter. Many compressors that can variably control the rotational speed of the compressor according to the air conditioning load are used.
Thus, in the electric compressor driven through the inverter, the control board or the like constituting the inverter circuit is housed and installed in an inverter box integrally formed on the outer periphery of the housing of the electric compressor, and the inverter is connected to the electric compressor. An integrated one has been proposed. Then, a heating element such as IGBT of the control board constituting the inverter circuit is disposed in contact with the bottom wall surface in the inverter box, and the control board is forcibly cooled by the endothermic action of the low-pressure refrigerant gas flowing in the housing of the electric compressor. What has been made possible is proposed (for example, see Patent Document 1).

  In addition, the first casing for storing the compression mechanism, the second casing for storing the motor, and the third casing for storing the inverter circuit are configured separately, and these three casings are adjacent to the first casing. Inverter-integrated electric compressor constructed by integrating the heat insulating portion (heat insulating space, resin, foaming material, etc.) that suppresses heat transfer between the first casing and the third casing ) Has been proposed (see, for example, Patent Document 2).

Japanese Patent Laying-Open No. 2003-262187 (FIG. 2) JP 2003-13859 A (paragraph [0029] and FIG. 2)

In the inverter-integrated electric compressors disclosed in Patent Documents 1 and 2 described above, a configuration provided with a cooling function or a heat protection function for an inverter circuit having a heating element, when the electric compressor is viewed alone. It is said that.
However, in these compressors, not only the conduction of heat generated by the operation of the compression mechanism, but also the heat transmitted or radiated from external equipment such as a running engine or motor for installing the compressor. On the other hand, it is difficult to say that the inverter circuit installed in the inverter box is sufficiently thermally protected, and there are still problems in terms of heat resistance reliability.
In addition, in the case of an inverter-integrated electric compressor mounted in an automobile, not only its own rotational vibration but also engine vibration and road surface vibration are added, and this vibration is also transmitted to the inverter circuit installed in the inverter box. . For this reason, the control board which comprises an inverter circuit may resonate at a natural frequency, and a big vibration may be produced. Suppressing this vibration is also an unavoidable problem in improving vibration resistance reliability and eliminating the cause of failure.

  This invention is made | formed in view of such a situation, Comprising: The thermal load with respect to the inverter circuit installed in an inverter box is reduced, and an inverter circuit is comprised, protecting an inverter circuit thermally enough. An object is to provide an inverter-integrated electric compressor capable of suppressing vibration of a control board.

In order to solve the above problems, the inverter-integrated electric compressor of the present invention employs the following means.
That is, an inverter-integrated electric compressor according to the present invention includes an inverter box provided on the outer periphery of a compressor housing and an inverter circuit having a control board and housed and installed in the inverter box. In the body type electric compressor, the inverter box is separate from the compressor housing, and the outer peripheral wall is a box made of a heat insulating resin material having a heat insulating resin material layer formed on both surfaces of a ceramic core material. is a, and wherein the fixed Tei Rukoto assembled together via a fixing means to the inverter box mounting portion integrally formed on the outer periphery of the compressor housing.

In this way, the inverter box is constructed separately from the compressor housing as a sandwich heat insulating resin material box with outer peripheral walls forming a heat insulating resin material layer on both sides of the ceramic core , and this is compressed Since the inverter box can be individually designed with high thermal insulation, it is possible to reduce the heat intrusion into the inverter box due to heat conduction and radiation from the outside. It is possible to reduce the thermal load on the inverter circuit. In particular, by making the inverter box a box made of a heat insulating resin material with a sandwich structure equipped with a ceramic core material with high heat insulation, it is possible to obtain a higher heat insulation effect and increase the strength of the inverter box by the sandwich structure. Can do.

  Furthermore, the inverter-integrated electric compressor of the present invention is characterized in that in the inverter-integrated electric compressor, the inverter box is filled with a gel-like resin material.

  As described above, by filling the inverter box with the gel-like resin material, the vibration of the control board can be suppressed by the vibration control action. In addition, when the gel-like resin material is filled, the intrusion heat from the outside is transmitted to the control board through the gel-like resin material, but the heat entry from the outside can be reduced by the heat insulation configuration of the inverter box. The thermal load on the control board can be reduced. Moreover, since the thermal expansion of the gel-like resin material can be suppressed, the stress on the control substrate due to the thermal expansion of the gel-like resin material can be reduced.

  Furthermore, the inverter-integrated electric compressor according to the present invention is any one of the above-described inverter-integrated electric compressors, wherein the inverter box has a bottom wall that comes into contact with the compressor housing when assembled to the compressor housing. At least a part is a heat conductive metal plate, and a heat generating element constituting the inverter circuit is in contact with the metal plate.

  As described above, a part of the bottom wall of the inverter box is a heat conductive metal plate, and an inverter circuit is formed on the metal plate. The heat generating element can be forcibly cooled by heat conduction through the compressor housing and the metal plate using the endothermic action of the low-pressure refrigerant gas that circulates, and the cooling function for the inverter circuit is coupled with the heat insulation effect of the inverter box. Can be improved.

  Furthermore, the inverter-integrated electric compressor according to the present invention is any one of the above-described inverter-integrated electric compressors, wherein the inverter box has a bottom wall that comes into contact with the compressor housing when assembled to the compressor housing. At least a part is an opening, a part of the compressor housing protrudes from the opening, and a heat generating element constituting the inverter circuit is in contact with the protrusion.

  As described above, an opening is provided in a part of the bottom wall of the inverter box, a part of the compressor housing is protruded from the opening, and an inverter circuit is formed in the protrusion, for example, a heating element such as an IGBT. By installing in contact, the heat absorption effect of the low-pressure refrigerant gas circulating in the compressor housing can be utilized, and the heating element can be forcibly cooled by heat conduction through the compressor housing, and the heat insulation effect of the inverter box In combination with this, the cooling function for the inverter circuit can be improved.

  Furthermore, the inverter-integrated electric compressor according to the present invention is any one of the above-described inverter-integrated electric compressors, wherein the inverter box mounting portion is formed on an upper surface of the outer periphery of the compressor housing, A mounting portion for a compressor mounting bracket is formed on one side surface.

  When this type of compressor is applied to a vehicle air conditioner, the compressor is often installed on a cylinder block side wall of an engine that is a heat radiator, for example, via a compressor mounting bracket. Conductor heat is transmitted from the engine through the compressor mounting bracket, its mounting portion and the compressor housing, and radiant heat from the engine. Since the inverter box is made of a heat insulating resin material, these Heat can be blocked from being transferred into the inverter box. Therefore, the inverter circuit can be protected thermally and the thermal load on the inverter circuit can be reduced.

  Furthermore, the inverter-integrated electric compressor according to the present invention is any one of the above-described inverter-integrated electric compressors, wherein the inverter box mounting portion is formed on one side surface of the compressor housing, and the compressor housing On the other side, a mounting portion for a compressor mounting bracket is formed.

  Since the inverter box mounting part is provided on one side of the outer periphery of the compressor housing and the mounting part of the compressor mounting bracket is provided on the other side of the compressor housing, the inverter box mounting part and the mounting part of the compressor mounting bracket Are formed at the most distant positions. Therefore, as described above, the distance from the engine to the inverter box can be increased even when the compressor is installed on the cylinder block side wall of the engine, which is a heat radiator, via the compressor installation bracket. For this reason, it is possible to reduce both conduction heat and radiant heat transmitted from the engine to the inverter circuit inside the inverter box, and to reduce the thermal load on the inverter circuit.

According to the present invention, the inverter box is configured separately from the compressor housing as a heat insulating resin material box having a sandwich structure in which an outer peripheral wall forms a heat insulating resin material layer on both sides of a ceramic core , Since the inverter box is integrally assembled and fixed to the compressor housing, the heat insulating property of the inverter box can be improved, and heat intrusion into the inverter box due to heat conduction and radiation from the outside can be reduced. Therefore, the thermal load on the inverter circuit can be reduced, the inverter circuit can be sufficiently thermally protected, and the heat resistance reliability can be improved.
Also, in the case where the above-mentioned inverter box is filled with a gel-like resin material, external vibration is transmitted to the control board of the inverter circuit by the vibration-damping action of the gel-like resin material, and the control board resonates. Generation and vibration can be suppressed. For this reason, the vibration resistance reliability can be improved together with the improvement of the heat resistance reliability.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a side view in which a part of the inverter-integrated electric compressor according to the present embodiment is broken, and FIG. 2 is a motor side that constitutes the housing of the inverter-integrated electric compressor shown in FIG. A sectional view of the housing is shown, and FIG. 3 is a perspective view schematically showing a state (A) after assembly of the inverter box to the electric compressor and a state (B) before assembly. FIG. 5 shows a plan view (A) and a perspective view (B) of the inverter box alone, and FIG . 5 shows a sectional view (A) showing the configuration of the outer peripheral wall and a sectional view (B) of the reference example. It is shown.
The inverter-integrated electric compressor 1 according to the present embodiment has a hermetically sealed housing 3 configured by fastening a compressor-side housing 5 and an electric-motor-side housing 7 with a bearing member 9 between them and fastening them with bolts 11. .

  A known scroll compression mechanism 13 is incorporated in the compressor-side housing 5. Further, a stator 17 and a rotor 19 constituting the electric motor 15 are incorporated in the electric motor side housing 7. The scroll compression mechanism 13 and the electric motor 15 are connected via a drive shaft (not shown), and the scroll compression mechanism 13 is driven by rotating the electric motor 15. In addition, a refrigerant suction port (not shown) is provided at an end of the motor-side housing 7, and a suction pipe of a refrigeration cycle is connected to the refrigerant suction port so that a low-pressure refrigerant gas is supplied to the motor-side housing 7. It is designed to be inhaled inside. This refrigerant gas circulates in the motor-side housing 7 and is sucked into the scroll compression mechanism 13, where it is compressed into a high-temperature and high-pressure refrigerant gas and is provided at the end of the compressor-side housing 5. (Not shown) is configured to be discharged to the discharge pipe of the refrigeration cycle.

The electric motor 15 is driven via the inverter 21 and the rotation speed is variably controlled according to the air conditioning load. The inverter 21 is integrated with the electric compressor by incorporating the inverter circuit 23 into the housing 3 of the electric compressor.
The control board constituting the inverter circuit 23 is divided into an upper board 25A and a lower board 25B. Here, the upper board 25A is a CPU board having an element that operates at a low voltage such as a CPU, and the lower board 25A. The substrate 25B is a power substrate including a heating element 25C such as an IGBT. In the present embodiment, only the upper substrate 25A and the lower substrate 25B constituting the inverter circuit 23 are shown as the constituent devices of the inverter 21, and the other devices are not shown.

In order to integrate the above-described inverter 21 into the housing 3 of the electric compressor, an inverter box mounting portion 27 is formed on the outer peripheral upper surface of the motor-side housing 7 constituting the housing 3, as shown in FIG. An inverter box 29 configured separately from the motor-side housing 7 is integrally assembled and fixed to the inverter box mounting portion 27 by a fixing bolt 31 (see FIG. 2).
The inverter box 29 has an open top surface and has a depth within which the upper substrate 25A and the lower substrate 25B can be stored and installed at a predetermined interval in the vertical direction.

The inverter box 29 is formed of a heat insulating resin material having a low thermal conductivity, unlike the motor-side housing 7 made of an aluminum alloy that easily transfers heat. As shown in FIG. 5A, the inverter box 29 composed of the heat insulating resin material has an outer peripheral wall (peripheral wall) having a ceramic material 29A as a core material and heat insulating resin materials on both surfaces thereof. It is a sandwich structure in which the layer 29B is formed. FIG. 5B shows a cross-sectional view of the outer peripheral wall of a reference example of the present invention in which the outer peripheral wall (peripheral wall) has a hollow structure in which an air layer 29C is formed. Examples of the heat insulating resin material include polyphenylene sulfide (PPS), polyarylate (PAR), polysulfane (PSF), polyethersulfan (PES), polyetherimide (PEI), and polyamideimide (PAI). And polyether ether ketone (PEEK). As shown in FIGS. 2 and 4 , a part of the bottom wall surface of the inverter box 29 is provided with a heat conductive metal plate 33 made of , for example, an aluminum alloy, and the motor side housing 7 made of an aluminum alloy. It comes to contact with.

As shown in FIGS. 1 and 2, the inverter box 29 is provided with a substrate mounting portion 35 at the bottom. The substrate mounting portion 35 includes a lower substrate 25B, that is, a heating element 25C such as an IGBT. The power board is firmly fixed and installed by screwing or the like with the heating element 25C in contact with the metal plate 33.
Further, on the upper inner surface of the inverter box 29, an upper substrate 25A, that is, an end portion of a CPU substrate having an element that operates at a low voltage, such as a CPU, is placed with a predetermined distance from the lower substrate 25B. A support protrusion 37 is provided. As will be described later, the support protrusion 37 temporarily places the upper substrate 25A in order to float the upper substrate 25A in the gel-like resin material 39 filled in the inverter box 29.

Further, the inverter box 29 is filled with a gel-like resin material 39 such as silicon gel in order to suppress the upper substrate 25A and the lower substrate 25B from resonating and vibrating due to transmission of external vibration or the like.
The gel-like resin material 39 is formed by pouring the lower substrate 25B from the upper surface opening of the inverter box 29 in a state where the upper substrate 25A is temporarily placed on the support protrusion 37 in the upper portion after the lower substrate 25B is installed on the substrate mounting portion 35. Filled. As a result, the upper substrate 25A is placed in a floating state in the gel-like resin material 39 filled in the inverter box 29 in the upper part of the lower substrate 25B.

After the inverter box 29 is filled with the gel-like resin material 39, the lid member 41 is attached to the upper surface opening by the fixing bolt 31 or another screw or the like.
Needless to say, the inverter circuit 23 is electrically connected to the electric motor 15 via an inverter output terminal, a lead wire, a motor terminal, etc. (not shown).

  In the inverter-integrated electric compressor configured as described above, the low-pressure refrigerant gas after circulating through the refrigeration cycle is sucked into the motor-side housing 7 from a refrigerant suction port (not shown), and the motor-side housing 7 The inside is circulated and sucked into the scroll compression mechanism 13. The refrigerant gas compressed by the scroll compression mechanism 13 to become high temperature and pressure is circulated from the discharge port provided at the end of the compressor side housing 5 to the refrigeration cycle through the discharge pipe.

  During this time, the low-pressure refrigerant gas flowing in the motor-side housing 7 reacts to the heat generated from the heating elements 25C of the inverter circuit 23 in the inverter box 27 and the housing wall of the motor-side housing 7 and the heat conductive metal plate. Endothermic action is performed via 33. As a result, the upper substrate 25A and the lower substrate 25B constituting the inverter circuit 23 installed in the inverter box 27 can be forcibly cooled. In particular, the heating element 25C on the lower substrate 25B side, which is a power substrate, is placed in contact with the metal plate 33, and thus is directly cooled through the housing wall and the metal plate 33. Therefore, the lower substrate 25B on the power substrate side can be efficiently cooled.

On the other hand, the heat generated when the scroll compression mechanism 13 compresses the refrigerant gas is conducted from the compressor-side housing 5, which becomes a high temperature, to the motor-side housing 7 and further to the inverter box 29. However, the inverter box 29 is made of a heat insulating resin material having a low thermal conductivity, and the outer peripheral wall has a sandwich structure in which a ceramic material 29A is a core material and heat insulating resin material layers 29B are formed on both surfaces thereof. Therefore, here to block heat transfer from the heat generated by the compression action of the refrigerant gas, an inverter circuit 23 disposed within the inverter box 29 can be protected thermally.

Similarly, with respect to heat transmitted from external equipment such as a running engine or motor or radiated heat, the inverter is configured as described above with a heat insulating resin material having low thermal conductivity. It is blocked by the box 29, and heat intrusion into the inverter box 29 due to heat conduction and radiation from the outside can be reduced. For this reason, the thermal load with respect to the inverter circuit 23 installed in the inside of the inverter box 29 can be reduced.

  Moreover, since the inverter-integrated electric compressor 1 is an in-vehicle electric compressor applied to a compressor of a vehicle air conditioner, not only vibrations associated with its own rotational fluctuation but also a traveling engine or motor Rotational vibration, etc., or external vibration such as road surface vibration during traveling is input. When this external vibration is transmitted to the upper substrate 25A and the lower substrate 25B that constitute the inverter circuit 23, the upper substrate 25A and the lower substrate 25B may resonate at a natural frequency, resulting in a large vibration.

Thus, the inverter box 29 is filled with a gel-like resin material 39 for reducing the vibration of the substrate, and the lower substrate 25B is firmly fixed to the substrate mounting portion 35 in the inverter box 29. Since it is installed, it is possible to suppress the lower substrate 25B from resonating at the natural frequency due to the transmission of external vibration and greatly vibrating.
Further, since the upper substrate 25A is placed in a floating state in the gel-like resin material 39 filled in the inverter box 29 and placed in an unrestrained state, vibration transmission from the outside is greatly reduced. The natural frequency of itself can be increased. For this reason, it is possible to suppress the upper substrate 25 </ b> A from resonating at the natural frequency due to the transmission of external vibration and greatly vibrating. Therefore, the vibration resistance of both the boards 25A and 25B can be improved.
In addition, when the gel-like resin material 39 is filled, intrusion heat from the outside is transmitted to both the boards 25A and 25B via the gel-like resin material 39. Since heat penetration can be reduced, the thermal load on both the boards 25A and 25B can be reduced. Moreover, since the thermal expansion of the gel-like resin material 39 can be suppressed, the stress on both the substrates 25A and 25B due to the thermal expansion of the gel-like resin material 39 can also be reduced.

Therefore, according to this embodiment, there are the following effects.
The inverter box 29 is made of a heat insulating resin material having a low thermal conductivity , and has a sandwich structure in which the ceramic material 29A is used as a core material and the heat insulating resin material layers 29B are formed on both sides thereof. By the action of the ceramic core material 29A having a high effect, the conduction heat or radiant heat from the outside can be blocked by the inverter box 29, and the heat entering from the outside into the inverter box 29 can be reduced. For this reason, the thermal load on the inverter circuit 23 can be reduced, the heat resistance reliability thereof can be improved , and the strength of the inverter box 29 itself can be increased by adopting the sandwich structure.

Further, since the gel box resin material 39 is filled in the inverter box 29 and the vibration control action can suppress a large vibration due to the resonance of the upper substrate 25A and the lower substrate 25B, the vibration resistance reliability of both the substrates 25A and 25B is achieved. The failure factor due to vibration can be reduced as much as possible.
Furthermore, since the heat generating element 25C such as an IGBT constituting the inverter circuit 23 is disposed in contact with the heat conductive metal plate 33 provided on the bottom wall surface of the inverter box 29, the heat generating element 25C is installed in the electric motor. Since forced cooling can be performed using the endothermic action of the low-pressure refrigerant gas flowing through the side housing 7, the heat resistance and vibration resistance can be improved as described above without impairing the cooling function for the inverter circuit 23. .

In the above-described embodiment, the heat conductive metal plate 33 is provided on a part of the bottom wall surface of the inverter box 29. However, instead of this structure, the portion where the metal plate 33 is provided is an opening. The projecting portion formed on the motor-side housing 7 may be projected from the opening, and a heating element 25C such as an IGBT may be placed in contact with the projecting portion. You can expect the same effect.
In this case, it is needless to say that the gel-like resin material 39 is not leaked.

[ Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The present embodiment differs from the first embodiment described above in the installation configuration of the inverter-integrated electric compressor 1. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In the inverter-integrated electric compressor 1 shown in FIG. 6, the inverter box mounting portion 27 is formed on the outer peripheral upper surface 3 </ b> A of the compressor housing 3. Further, on the outer peripheral side surface 3B of the compressor housing 3, a mounting portion 55A of a compressor installation bracket 53 for installing the inverter-integrated electric compressor 1 on the cylinder block side wall 51 of the engine is formed.

  When the above-described inverter-integrated electric compressor 1 is applied to a vehicle air conditioner, the inverter-integrated electric compressor 1 is connected to a cylinder block side wall 51 of an engine, which is a heat radiator, via a compressor mounting bracket 53, for example. Often installed. In this case, the inverter box 29 is transmitted with conduction heat from the engine through the mounting bracket 53, its mounting portion 55A and the compressor housing 3, and radiant heat radiated from the engine. The box 29 can block the transfer of heat from the outside to the inside. Therefore, the inverter circuit 23 provided in the inverter box 29 can be thermally protected.

  In the inverter-integrated electric compressor 1 shown in FIG. 7, the inverter box mounting portion 27 is formed on the outer peripheral side surface 3 </ b> C of the compressor housing 3. A mounting portion 55B for the compressor installation bracket 53 is formed on the outer peripheral other side surface 3D of the compressor housing 3.

In this manner, the inverter box mounting portion 27 is provided on one side surface of the compressor housing 3 and the mounting portion 55B of the compressor installation bracket 53 is provided on the other side surface of the compressor housing 3, whereby the inverter box mounting portion 27 is provided. And the attachment portion 55B of the compressor installation bracket 53 are formed at the most distant positions. For this reason, even when the compressor is installed on the cylinder block side wall 51 of the engine, which is a heat radiator, via the installation bracket 53, the distance from the engine to the inverter box 29 can be increased. It is possible to reduce both conduction heat and radiant heat from the engine transmitted to the inverter circuit 23 provided in the.
Therefore, the thermal protection function of the inverter circuit 23 can be further enhanced.

  Needless to say, the present invention is not limited to the scroll type electric compressor but can be widely applied to other types of electric compressors.

It is a partially broken side view of the inverter-integrated electric compressor according to the first embodiment of the present invention. It is sectional drawing of the state which removed the cover member of the inverter box of the motor side housing of the inverter integrated electric compressor shown in FIG. It is a perspective view which shows typically the state figure (A) after the assembly | attachment of the inverter box with respect to the main body of the electric compressor shown in FIG. 1, and the state figure (B) before an assembly | attachment. They are the top view (A) and perspective view (B) which show the structure of the inverter box of the inverter integrated electric compressor shown in FIG. It is sectional drawing (A) which shows the structure of the outer peripheral wall of the inverter box shown in FIG. 1, and sectional drawing (B) of the reference example. It is a side view which shows the installation state of the inverter integrated electric compressor concerning 2nd Embodiment of this invention. It is a side view which shows another installation state of the inverter integrated electric compressor concerning 2nd Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Inverter integrated electric compressor 3 Compressor housing 3A Housing outer peripheral upper surface 3B, 3C Housing outer peripheral one side 3D Housing outer peripheral other side 7 Motor side housing 21 Inverter 23 Inverter circuit 25A, 25B Control board 25C Heating element 27 Inverter box attachment part 29 Inverter box 29A Ceramic material 29B Insulating resin material layer 29C Air layer 31 Fixing bolt 33 Metal plate 39 Gel resin material 53 Compressor installation brackets 55A and 55B

Claims (6)

In an inverter-integrated electric compressor having an inverter box provided on an outer periphery of a compressor housing, and an inverter circuit having a control board and housed in the inverter box,
The inverter box is separate from the compressor housing and is a heat insulating resin material box having a sandwich structure in which an outer peripheral wall has heat insulating resin material layers formed on both surfaces of a ceramic core. the inverter-integrated electric compressor, wherein a fixed Tei Rukoto assembled together via a fixing means to the inverter box mounting portion integrally formed on the outer periphery of the housing.   The inverter-integrated electric compressor according to claim 1, wherein the inverter box is filled with a gel-like resin material. In the inverter box, at least a part of a bottom wall contacting the compressor housing by being assembled to the compressor housing is a thermally conductive metal plate,
The inverter-integrated electric compressor according to claim 1, wherein a heat generating element constituting the inverter circuit is placed in contact with the metal plate. In the inverter box, at least a part of a bottom wall contacting the compressor housing by being assembled to the compressor housing is an opening.
3. The inverter integrated type according to claim 1, wherein a part of the compressor housing protrudes from the opening, and a heat generating element constituting the inverter circuit is in contact with the protrusion. Electric compressor. The inverter box mounting portion is formed on the upper surface of the outer periphery of the compressor housing,
The inverter-integrated electric compressor according to any one of claims 1 to 4 , wherein a mounting portion of a compressor mounting bracket is formed on one side surface of the outer periphery of the compressor housing. The inverter box mounting portion is formed on one side surface of the compressor housing outer periphery,
The inverter-integrated electric compressor according to any one of claims 1 to 4 , wherein a mounting portion for a compressor mounting bracket is formed on the other side surface of the outer periphery of the compressor housing.

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