JP2011252398A - Inverter-integrated electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent vibration from damaging a lead terminal for connecting an electric part to a control circuit board, while effectively dissipating heat of the heating electric part mounted on the control circuit board of an inverter, by a simple structure.SOLUTION: A vibration base isolation structure A includes a control circuit board 25 fixed in an inverter box 23, and a heating electric part 35 provided at a bottom part of the inverter box 23 in contact with a heat dissipating plane part 31, for isolating vibration particularly in the thickness direction T of the control circuit board 25 with respect to the lead terminal 35a of the electric part 35. The vibration base isolation structure A is configured to connect the lead terminal 35a of the electric part 35 to the control circuit board 25, while co-fastening the electric part 35 and the control circuit board 25 to the heat radiating plane part 31 by a fastening member 37, the control circuit board 25 being in contact with the electric part 35 with out gap and the electric part 35 being in contact with the heat dissipating plane part 31.

Description

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

  In recent years, in addition to automobiles that are driven by internal combustion engines, development and introduction of vehicles that use the power of electric motors, such as electric cars, hybrid cars, and fuel cell cars, are rapidly progressing. In many of the air conditioners for automobiles powered by such an electric motor, an electric compressor using an electric motor as a drive source is also used for a compressor that compresses and delivers a refrigerant.

  Also, in an air conditioner for an automobile that runs on an internal combustion engine, instead of a compressor driven via an electromagnetic clutch by a traveling internal combustion engine, an electric motor is used to improve the decrease in drivability associated with the intermittent engagement of the electromagnetic clutch. Some compressors are used.

  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.

  In the electric compressor driven through the inverter in this way, the control circuit board or the like constituting the inverter is housed and installed in an inverter box integrally formed on the outer periphery of the housing of the electric compressor so that the inverter is connected to the electric compressor. In addition, a heat generating electrical component such as a smoothing capacitor that suppresses a ripple of a supply current to the control circuit board or the like, or a power control semiconductor such as an IGBT (Insulated Gate Bipolar Transistor) is described above. The thing accommodated in the inverter box is proposed (for example, refer patent documents 1 and 2).

  As shown in FIG. 1 of the same document, the integrated electric compressor described in Patent Document 1 is an IGBT mounted on the lower surface side of the control circuit board of the inverter via a gap in the inverter box. An exothermic electrical component such as abuts against the bottom plate of the inverter box, that is, a heat radiation flat portion (heat sink) thermally connected to the outer wall of the electric compressor housing via a heat radiation sheet made of silicon rubber. Depending on the configuration, the heat of the electrical component is radiated to the housing side.

  Further, the integrated electric compressor described in Patent Document 2 is mounted on the lower surface side of the control circuit board of the inverter via a gap in the inverter box as disclosed in FIG. 2 of the same document. The heat-generating electrical component is disposed so as to directly contact the bottom plate of the inverter box (housing), and the heat of the electrical component is radiated to the housing side.

  In such an inverter-integrated electric compressor, in order to maximize the heat dissipation of the heat-generating electric parts, the electric parts are fastened with screws or the like to the bottom plate of the inverter box, that is, the heat-dissipating flat part on the housing side. It is preferable to fasten and fix them using a member, or to stick them through an adhesive sheet or the like, fix the electrical component and the heat dissipation surface, and thermally connect them.

JP 2003-153552 A Japanese Patent No. 3786356

  By the way, since such an inverter-integrated electric compressor is generally directly attached to an automobile engine, the engine vibration, the vehicle body vibration, the rotational vibration of the electric motor, and the like are always generated when the automobile is running. Acts on the electric compressor. This vibration is also applied to the control circuit board of the inverter, and causes the control circuit board to resonate mainly in the thickness direction in the inverter box.

  For this reason, in the configuration of the integrated electric compressor described in Patent Documents 1 and 2, it is mounted on the lower surface of the control circuit board via a gap, and is fastened or pasted to the bottom plate (the heat radiation flat portion) of the inverter box. Relative displacement occurs repeatedly between the electrical component fixed by wearing and the control circuit board that vibrates in the thickness direction, and metal fatigue accumulates in the lead terminal (lead terminal) that connects the electrical component to the control circuit board. Therefore, there is a concern that the lead terminal may be deformed or broken with long-term use.

  The present invention has been made in view of such circumstances, and with a simple structure, while effectively dissipating heat-generating electrical components mounted on a control circuit board of an inverter, An object of the present invention is to provide an inverter-integrated electric compressor capable of preventing a lead terminal connected to a control circuit board from being damaged by vibration.

In order to solve the above problems, 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 an outer periphery of a housing, an inverter having a control circuit board and housed and installed in the inverter box, and installed in the inverter box And the lead terminal is electrically connected to the control circuit board to form the inverter, and the flat portion provided on the inner wall of the inverter box, In the inverter-integrated electric compressor configured to dissipate heat of the electric component to the housing side by contacting the flat portion, the control circuit board is fixed in the inverter box, and the electric component Vibration isolation for isolating the vibration of the control circuit board with respect to the lead terminal in a state of being in contact with the flat portion Characterized in that a granulated.

  According to the present invention, since the control circuit board is fixed in the inverter box and the electric component is in contact with the flat portion, the vibration of the control circuit board is isolated from the lead terminal. While effectively dissipating heat, the lead terminals of the electrical components can be prevented from being damaged by vibration of the control circuit board.

  In the present invention, the vibration isolation structure causes the electrical component to abut against the flat portion, and causes the control circuit board to abut on the electrical component without interposing a space between the electrical component and the control circuit. It is good also as a structure which connects the lead terminal of the said electrical component to the said control circuit board, after fastening together with a board | substrate to the said plane part with a fastening member.

  In the case of the above configuration, since the control circuit board and the electric component are fastened to the flat portion by the fastening member without a space, the control circuit board may vibrate particularly in the thickness direction at the position of the electric component. Since the lead terminal of the electrical component is connected to the control circuit board at this position, even if the control circuit board vibrates in the thickness direction at another position, the vibration is isolated from the lead terminal. . For this reason, it is possible to prevent the lead terminal from being damaged by the vibration of the control circuit board while effectively radiating the electric component with a simple structure.

  In the present invention, the vibration isolation structure is fixed in a state where the electric component is in contact with the flat portion, and the control circuit board is fixed in the inverter box with a space from the electric component. The lead terminal of the electrical component is inserted into a terminal insertion part provided in the control circuit board, the terminal insertion part elastically holds the lead terminal, and the lead terminal is attached to the control circuit board. The lead terminal may be allowed to slide in the axial direction while being electrically connected.

  According to the above configuration, when the control circuit board vibrates in the thickness direction, for example, the terminal insertion part vibrates together with the control circuit board, but the lead terminal inserted into the terminal insertion part is axial with respect to the terminal insertion part. Therefore, the vibration of the control circuit board is isolated from the lead terminal. For this reason, it is possible to prevent the lead terminal from being damaged by the vibration of the control circuit board while effectively radiating the electric component with a simple structure.

  In the present invention, the vibration isolation structure fixes the electric component in contact with the flat portion, and fixes the control circuit board in the inverter box with a space from the electric component. The lead terminal is electrically connected to the control circuit board in a state in which a reinforcement covering member is provided to cover the lead terminal of the electrical component, and the reinforcement covering member is deformed at least in the bending direction of the lead terminal. It is good also as what has the rigidity which can prevent.

  When it is set as the said structure, the reinforcement coating | coated member which covers the lead terminal of an electrical component becomes a pillar, and suppresses the vibration to the thickness direction of a control circuit board. For this reason, even if the other part of the control circuit board vibrates in the thickness direction, the vibration is not transmitted to the lead terminal and is isolated. For this reason, it is possible to prevent the lead terminal from being damaged by the vibration of the control circuit board while effectively radiating the electric component with a simple structure.

  In the present invention, the electrical isolation structure is closely fitted in a fitting hole formed in the flat portion so that the inside of the inverter box communicates with the inside of the housing. It is also possible to have a structure in which a component can be moved in the thickness direction of the control circuit board through the fitting hole, and the lead terminal of the electrical component is electrically connected to the control circuit board.

  According to the said structure, since an electrical component can touch the refrigerant | coolant which flows through the inside of a housing directly, an electrical component can be thermally radiated effectively. When the control circuit board vibrates in the thickness direction, the electrical components connected to the control circuit board and the lead terminal move in the same direction inside the fitting hole. The stress due to vibration is not transmitted, and the lead terminal is isolated, preventing damage.

  In the present invention, the vibration isolation structure fixes the electric component in contact with the flat portion, and fixes the control circuit board in the inverter box with a space from the electric component. And it is good also as a structure which electrically connected the lead terminal of the said electrical component to the said control circuit board, and provided the expansion-contraction shape which can be expanded-contracted to the said lead terminal.

  According to the above configuration, when the control circuit board vibrates in the thickness direction, the expansion and contraction shape applied to the lead terminal expands and contracts to absorb the vibration of the control circuit board. For this reason, with a simple structure, it is possible to radiate the electrical components effectively and to dampen the vibration of the control circuit board with respect to the lead terminal, thereby preventing the lead terminal from being damaged.

  In the present invention, the vibration isolation structure fixes the electric component in contact with the flat portion, and fixes the control circuit board in the inverter box with a space from the electric component. Then, the lead terminal of the electrical component is once extended to the surface side of the control circuit board opposite to the side where the electrical component is present, and then a U-turn portion is formed. May be electrically connected to the control circuit board.

  According to the above configuration, when the control circuit board vibrates in the thickness direction, the bent or refracted portion of the lead terminal is flexed to absorb the vibration of the control circuit board. For this reason, with a simple structure, it is possible to prevent the lead terminal from being damaged by isolating the vibration of the control circuit board with respect to the lead terminal while effectively dissipating the electric component.

  As described above, according to the inverter-integrated electric compressor of the present invention, the electric component is controlled while effectively dissipating the heat-generating electric component mounted on the control circuit board of the inverter with a simple structure. It is possible to prevent the lead terminals connected to the circuit board from being damaged by vibration.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view explaining schematic structure of the inverter integrated electric compressor which concerns on 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the inverter box vicinity which shows 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the inverter box vicinity which shows 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the inverter box vicinity which shows 3rd Embodiment of this invention. It is a longitudinal cross-sectional view of the inverter box vicinity which shows 4th Embodiment of this invention. It is a longitudinal cross-sectional view of the inverter box vicinity which shows 5th Embodiment of this invention. It is a longitudinal cross-sectional view of the inverter box vicinity which shows 6th Embodiment of this invention.

  Hereinafter, a plurality of embodiments of an inverter-integrated electric compressor according to the present invention will be described with reference to the drawings.

[First Embodiment]
First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view for explaining the outline of the configuration of an inverter-integrated electric compressor according to this embodiment, and FIG. 2 is a longitudinal sectional view of the vicinity of the inverter box of the inverter-integrated electric compressor. The inverter-integrated electric compressor 1 is a compressor used in a vehicle air conditioner, and the drive rotation speed is controlled by the inverter.

  The inverter-integrated electric compressor 1 has an aluminum alloy housing 2 that forms an outer shell. The housing 2 includes a compressor side housing 3 and an electric motor side housing 4 with a bearing housing 5 interposed therebetween. The bolt 6 is fastened and fixed.

  A known scroll compression mechanism 8 is incorporated in the compressor-side housing 3. Further, a stator 11 and a rotor 12 constituting the electric motor 10 are incorporated in the electric motor side housing 4. The scroll compression mechanism 8 and the electric motor 10 are connected via a main shaft 14, and the scroll compression mechanism 8 is driven by rotating the electric motor 10. The main shaft 14 is rotatably supported by a main bearing 15 held by the bearing housing 5 and a sub-bearing 16 held by the end portion of the motor-side housing 4.

  A refrigerant suction port (not shown) is provided at the end of the motor-side housing 4, and a suction pipe for a refrigeration cycle is connected to the refrigerant suction port so that low-pressure refrigerant gas is sucked into the motor-side housing 4. It has come to be. The refrigerant gas flows through the motor side housing 4 and cools the motor 10, and then is sucked into the scroll compression mechanism 8, where it is compressed into a high-temperature and high-pressure refrigerant gas, and is provided at the end of the compressor side housing 3. It is configured to be discharged from a discharge port (not shown) to the discharge pipe of the refrigeration cycle.

  The electric motor 10 is driven via an inverter 21 and the rotation speed is variably controlled according to the air conditioning load. The inverter 21 is configured such that a control circuit board 25 is housed and installed in a rectangular inverter box 23 in plan view formed integrally with the outer periphery of the housing 2, and is integrated with the inverter-integrated electric compressor 1. ing. The inverter 21 is electrically connected to the electric motor 10 through an inverter output terminal, a lead wire, a motor terminal, etc. (not shown).

  As shown also in FIG. 2, the inverter box 23 has a structure in which, for example, a peripheral wall 27 is integrally formed on an upper portion of the motor-side housing 4, and an upper opening thereof is liquid-tightly closed by a lid member 28. The depth of the inverter box 23 is set to a depth at which components such as the control circuit board 25 and other boards (not shown) can be accommodated. The bottom plate 29 of the inverter box 23 constitutes the outer wall of the motor-side housing 4. A flat and horizontal heat radiation flat portion 31 (plane portion) is formed here, and the control circuit board 25 is disposed on the heat radiation flat portion 31. They are arranged in parallel.

  The control circuit board 25 is a power board on which a plurality of heating elements such as IGBTs 35 are mounted, for example. In addition, illustration of components mounted on the control circuit board 25 other than the IGBT 35 is omitted. Moreover, in this embodiment, only the control circuit board 25 is shown as a component device of the inverter 21, and illustration of other devices is omitted.

  Electrical components such as the IGBT 35 are mounted on the lower surface side of the control circuit board 25, and a plurality of lead terminals 35a are inserted from below into lead terminal insertion holes 25a (see FIG. 2) drilled in the control circuit board 25. It is electrically connected to the control circuit board 25 by soldering. The lower surface of the IGBT 35 is in contact with the heat radiation flat portion 31 so that the heat generated by the IGBT 35 is radiated to the heat radiation flat portion 31 side.

  In the inverter-integrated electric compressor 1, as shown in an enlarged view in FIG. 2, the control circuit board 25 is fixed in the inverter box 23, and the IGBT 35, which is a heat generating element, abuts the heat radiating flat portion 31. In this state, a vibration isolation structure A is provided that isolates vibration of the control circuit board 25, particularly in the thickness direction T, from the lead terminal 35a.

  As shown in FIG. 2, the vibration isolation structure A is placed so that the IGBT 35 comes into contact with the heat radiating flat portion 31, and the control circuit board 25 is placed on the IGBT 35 without a space, and the IGBT 35. And the control circuit board 25 are fastened together with the heat radiation flat portion 31 by fastening members such as bolts 37. Therefore, a bolt insertion hole 35b through which the bolt 37 is inserted is formed in the IGBT 35. As described above, the lead terminal 35 a of the IGBT 35 is electrically connected to the control circuit board 25 by soldering 38. For example, in the present embodiment, the IGBT 35 is disposed on the bottom surface of the four corners of the rectangular control circuit board 25, and each is fastened together with the heat radiation flat surface portion 31 by a bolt 37.

  In the inverter-integrated electric compressor 1 configured as described above, the low-pressure refrigerant gas after circulating through the refrigeration cycle is sucked into the motor-side housing 4 from a refrigerant suction port (not shown), It is distributed and sucked into the scroll compression mechanism 8. The refrigerant gas compressed by the scroll compression mechanism 8 to become high temperature and pressure is circulated from a discharge port (not shown) provided at the end of the compressor side housing 3 to a refrigeration cycle through a discharge pipe.

  During this time, the low-temperature low-pressure refrigerant gas flowing in the motor-side housing 4 radiates heat that is also the housing outer wall of the motor-side housing 4 with respect to the operating heat generated from the IGBT 35 that is the heating element of the inverter 21 in the inverter box 23. An endothermic action is performed via the plane portion 31 for use. As a result, the control circuit board 25 constituting the inverter 21 installed in the inverter box 23 can be forcibly cooled.

  In particular, the electrical components such as the IGBT 35 which is a heat generating element mounted on the control circuit board 25 which is a power board are installed so that the lower surface thereof is in contact with the flat surface 31 for heat dissipation. Heat is radiated directly to the motor side housing 4 side through the flat portion 31. Therefore, it is possible to efficiently cool the control circuit board 25 that is a power board that generates a particularly large amount of heat.

  And according to the vibration isolation structure A which is 1st Embodiment of this invention, even if the control circuit board 25 is fixed in the inverter box 23, and IGBT35 is the state contact | abutted to the flat part 31 for heat dissipation. The vibration in the thickness direction T of the control circuit board 25 is isolated from the lead terminal 35a. That is, even if the control circuit board 25 resonates due to engine vibration, vehicle body vibration, operating vibration of the electric motor 10 or the scroll compression mechanism 8, and the vicinity of the center of the control circuit board 25 vibrates in the thickness direction T, the control circuit board Since the four corner portions of 25 are fixed to the heat radiation flat portion 31 with bolts 37 with the IGBT 35 interposed therebetween without a space, there is no room for relative movement between the control circuit board 25 and the IGBT 35.

  For this reason, the relative displacement is repeatedly generated between the control circuit board 25 and the IGBT 35 as in the prior art, and metal fatigue accumulates in the lead terminal 35a of the IGBT 35, and the lead terminal 35a is deformed or broken with long-term use. It is possible to surely eliminate the concern that will occur. The vibration isolation structure A has a very simple configuration in which the control circuit board 25 and the IGBT 35 are fastened together with the heat radiation flat surface portion 31 with the bolts 37, so that the manufacturing cost is not increased and the IGBT 35 is dissipated. It is possible to prevent the lead terminal 35 a from being damaged by vibration of the control circuit board 25 while being in contact with the flat surface portion 31 and effectively radiating heat.

  Further, since the IGBT 35 is in close contact with the lower surface of the control circuit board 25 without any space, when assembling the control circuit board 25 and the IGBT 35, the lead terminals 35a of the IGBT 35 are soldered to the control circuit board 25 in advance. After the members 25 and 35 are integrated, both the members 25 and 35 may be fastened to the heat radiation flat portion 31 with bolts 37. For this reason, a plurality of IGBTs 35 are arranged on the heat radiation flat part 31 in advance as in the prior art, are positioned and fastened and fixed, and then covered with the control circuit board 25 from the top of each IGBT 35. The lead terminal 35a is inserted into the lead terminal insertion hole 25a of the control circuit board 25, and then the lead terminals 35a are soldered to the control circuit board 25. Moreover, since it is not necessary to perform this soldering operation in the narrow inverter box 23, the assembly workability around the inverter 21 can be remarkably improved.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. Also in the second embodiment, the control circuit board 25 is fixed in the inverter box 23 and the control circuit board 25 is vibrated in the thickness direction T in a state where the IGBT 35 which is a heat generating element is in contact with the heat radiation flat portion 31. Is provided with a vibration isolation structure B that isolates the lead terminal 35a from vibration. In this embodiment, a plate-like heat conductive member 41 formed of a good heat conductive material such as an aluminum alloy is fastened to a part or all of the bottom plate 29 of the inverter box 23 by screws, It is laid by fixing means such as adhesion, fitting, casting, etc., and its upper surface is a heat radiation flat portion 31.

  The vibration isolation structure B is fastened and fixed by a bolt 43 in a state in which the IGBT 35 is in contact with the heat radiation flat portion 31, and the control circuit board 25 is fixed in the inverter box 23 in a state of being spaced from the IGBT 35, The lead terminal 35 a of the IGBT 35 is inserted into a terminal insertion portion 25 b provided on the control circuit board 25. The control circuit board 25 is fastened with a bolt 45 to a board fastening boss 44 formed in the inverter box 23 so as to be one step higher than the heat radiation flat portion 31, and a space is provided between the control circuit board 25 and the IGBT 35. Yes.

  The terminal insertion portion 25b provided on the control circuit board 25 is, for example, a pigeon-shaped fitting, and when the lead terminal 35a of the IGBT 35 is inserted, the lead terminal 35a is held lightly and elastically to hold the lead terminal 35a. The lead terminal 35a is allowed to move in the axial direction while being electrically connected to the control circuit board 25. The terminal insertion portion 25b is not limited to the eyelet-shaped metal fitting, but may have other structures as long as it allows the movement of the lead terminal 35a in the axial direction while maintaining electrical continuity with the lead terminal 35a. .

  According to the vibration isolation structure B of the second embodiment of the present invention thus configured, when the control circuit board 25 vibrates in its thickness direction T, the terminal insertion portion 25b also vibrates together with the control circuit board 25. However, since the lead terminal 35a inserted into the terminal insertion portion 25b can slide in the axial direction while maintaining electrical continuity with the terminal insertion portion 25b, the function of the IGBT 35 as an electrical component is not impaired. The vibration of the control circuit board 25 is isolated from the lead terminal 35a. For this reason, it is possible to prevent the lead terminal 35 a from being damaged by the vibration of the control circuit board 25 while effectively radiating the IGBT 35 with a simple structure.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, a vibration isolation structure C is provided that isolates vibrations in the thickness direction T of the control circuit board 25 from the lead terminals 35a of the IGBT 35 that is a heating element. In this vibration isolation structure C, a reinforcing covering member 35c that covers the periphery of the lead terminal 35a is provided, and the tip of the lead terminal 35a is electrically connected to the control circuit board 25 by soldering 38. Except for this point, the configuration is the same as that of the second embodiment shown in FIG.

  The lead terminal 35a is electrically connected to the control circuit board 25 by soldering 38 in a state where the reinforcing covering member 35c is provided. The reinforcing covering member 35c is a cylindrical member formed of an insulating material such as a resin, for example, and has at least rigidity capable of preventing deformation of the lead terminal 35a in the bending direction. Note that a fitting recess 25c into which the upper end portion of the reinforcing covering member 35c is fitted may be formed on the lower surface of the control circuit board 25 by aligning the lead terminal 35a with the position penetrating the control circuit board 25.

  According to the vibration isolation structure C that is the third embodiment of the present invention configured as described above, the reinforcing covering member 35c covering the lead terminal 35a of the IGBT 35 serves as a column in the thickness direction T of the control circuit board 25. Suppresses vibration. For this reason, even if the other part of the control circuit board 25 vibrates in the thickness direction T, the vibration is not transmitted to the lead terminal 35 a, and the lead terminal 35 a is isolated from the vibration of the control circuit board 25. For this reason, it is possible to prevent the lead terminal 35a from being damaged by the vibration of the control circuit board 25 with a simple structure.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, a vibration isolation structure D is provided that isolates vibrations in the thickness direction T of the control circuit board 25 from the lead terminals 35a of the IGBT 35, which is a heating element. The fixing structure of the control circuit board 25 is the same as that of the second embodiment shown in FIG.

  In this vibration isolation structure D, a plurality of fitting holes 31a are formed in the heat radiation flat portion 31 (bottom plate 29) so that the inside of the inverter box 23 communicates with the inside of the housing 2 (a space below the bottom plate 29). The plurality of IGBTs 35 are closely fitted in these fitting holes 31a. Each IGBT 35 can move in the thickness direction T of the control circuit board 25 inside the fitting hole 31a. The lead terminal 35 a of the IGBT 35 is electrically connected to the control circuit board 25 by soldering 38. A seal member 35d is provided between the IGBT 35 and the fitting hole 31a to prevent the refrigerant gas in the housing 2 from flowing into the inverter box 23 while allowing the IGBT 35 to move in the vertical direction. May be.

  According to the vibration isolation structure D that is the fourth embodiment of the present invention configured as described above, the bottom surface of the IGBT 35 fitted in the fitting hole 31 a directly touches the refrigerant gas G flowing inside the housing 2. Therefore, the IGBT 35 can be effectively dissipated. When the control circuit board 25 vibrates in the thickness direction T, the IGBT 35 connected by the control circuit board 25 and the lead terminal 35a moves (swings) in the same direction inside the fitting hole 31a. For this reason, stress due to vibration of the control circuit board 25 is not transmitted to the lead terminal 35a, and the lead terminal 35a is isolated to prevent damage.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment, a vibration isolation structure E that isolates vibrations in the thickness direction T of the control circuit board 25 from the lead terminals 35a of the IGBT 35 is provided. In this vibration isolation structure E, the configuration is the same as that of the vibration isolation structure C of the third embodiment shown in FIG. 4 except that the lead terminal 35a of the IGBT 35 is provided with a telescopic shape 35e. The lead terminal 35a expandable shape 35e is obtained by deforming the intermediate portion of the lead terminal 35a into a stretchable shape such as a zigzag shape, a wave shape, or a coil spring shape. The control circuit board 25 is electrically connected.

  According to the vibration isolation structure E configured as described above, when the control circuit board 25 vibrates in the thickness direction T, the expansion and contraction shape 35e of the lead terminal 35a expands and contracts to absorb the vibration of the control circuit board 25. Is done. For this reason, the vibration of the control circuit board 25 is isolated from the lead terminal 35a, and damage to the lead terminal 35a can be prevented. It should be noted that the timing of applying the expansion / contraction shape 35e to the lead terminal 35a may be performed immediately before the lead terminal 35a is soldered to the control circuit board 25, for example, by easily bending or bending the lead terminal 35a with radio pliers or the like. This will not increase the cost.

[Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described with reference to FIG. In the sixth embodiment, a vibration isolation structure F that isolates vibration in the thickness direction T of the control circuit board 25 from the lead terminal 35a of the IGBT 35 is provided. In this vibration isolation structure F, the lead terminal 35a of the IGBT 35 is inserted into, for example, a terminal insertion hole 25d drilled in the control circuit board 25, and on the opposite side (upper surface side) to the side where the IGBT 35 is (lower surface side). The U-turn part 35f is formed in the middle part after extending once and then bent into an arcuate shape, and the tip side of the U-turn part 35f is electrically connected to the control circuit board 25 by soldering 38. In addition, without forming the terminal insertion hole 25d in the control circuit board 25, for example, the lead terminal 35a is extended to the upper surface of the control circuit board 25 through the outside of one side of the control circuit board 25 in plan view, and the U-turn portion You may make it solder on the upper surface of the control circuit board 25 through 35f. Further, a notch or the like corresponding to the terminal insertion hole 25d may be formed.

  According to the vibration isolation structure F configured as described above, when the control circuit board 25 vibrates in the thickness direction T, the U-turn portion 35f of the lead terminal 35a is flexed to vibrate the control circuit board 25. Is absorbed. At this time, the straight line portion of the lead terminal 35a closer to the base than the U-turn portion 35f is relatively displaced in the axial direction inside the terminal insertion hole 25d of the control circuit board 25. Therefore, the vibration of the control circuit board 25 can be isolated from the lead terminal 35a, and damage to the lead terminal 35a can be prevented.

  The timing of forming the U-turn portion 35f on the lead terminal 35a may be just before soldering the lead terminal 35a to the control circuit board 25. Generally, when the IGBT 35 is a single component, the lead terminal 35a is a long straight line. The U-turn portion 35f can be easily formed using radio pliers or the like, and there is no cost increase.

  In addition, it cannot be overemphasized that a vibration isolation structure is not limited only to the aspect (vibration isolation structure AF) of the 1st-6th embodiment mentioned above. In short, any other configuration may be used as long as vibration in the thickness direction T of the control circuit board 25 can be isolated from the lead terminal 35a of the IGBT 35. In addition, for example, it is conceivable to make changes that do not depart from the scope of the claims, such as appropriately combining the configurations of the first to sixth embodiments.

DESCRIPTION OF SYMBOLS 1 Inverter-integrated electric compressor 2 Housing 21 Inverter 23 Inverter box 25 Control circuit board 25b Terminal insertion part 31 Radiation flat part (flat part)
31a Fitting hole 35 IGBT (Electrical component)
35a Lead terminal 35c Reinforcement covering member 35e Stretchable shape 35f U-turn part 37 Bolt (fastening member)
A to F Vibration isolation structure T Control circuit board thickness direction

Claims (7)

An inverter box provided on the outer periphery of the housing;
An inverter having a control circuit board and housed in the inverter box;
An electrical component that is installed in the inverter box and whose lead terminal is electrically connected to the control circuit board to constitute the inverter;
A plane portion provided on the inner wall portion of the inverter box,
In the inverter-integrated electric compressor configured to dissipate heat of the electric component to the housing side by bringing the electric component into contact with the flat portion,
A vibration isolation structure is provided for isolating the vibration of the control circuit board from the lead terminal in a state where the control circuit board is fixed in the inverter box and the electrical component is in contact with the flat portion. An inverter-integrated electric compressor characterized by that.   In the vibration isolation structure, the electric component is brought into contact with the flat portion, the control circuit board is brought into contact with the electric part without a space, and the electric component and the control circuit board are fastened. 2. The inverter-integrated electric compressor according to claim 1, wherein the inverter-integrated electric compressor has a structure in which a lead terminal of the electric component is connected to the control circuit board after being fastened to the flat portion with a member.   The vibration isolation structure fixes the electrical component in contact with the planar portion, fixes the control circuit board in the inverter box in a state spaced from the electrical component, and The lead terminal of the component is inserted into a terminal insertion portion provided in the control circuit board, and the terminal insertion section elastically holds the lead terminal and electrically connects the lead terminal to the control circuit board. 2. The inverter-integrated electric compressor according to claim 1, wherein the lead terminal is allowed to slide in an axial direction while being electrically connected.   The vibration isolation structure fixes the electrical component in contact with the planar portion, fixes the control circuit board in the inverter box in a state spaced from the electrical component, and The lead terminal is electrically connected to the control circuit board in a state in which a reinforcing covering member is provided to cover the lead terminal of the component, and the reinforcing covering member can at least prevent deformation of the lead terminal in the bending direction. The inverter-integrated electric compressor according to claim 1, wherein the inverter-integrated electric compressor is provided.   The vibration isolation structure is configured such that the electrical component is closely fitted in a fitting hole formed in the planar portion so as to allow communication between the interior of the inverter box and the interior of the housing. 2. The structure according to claim 1, wherein a lead terminal of the electrical component is electrically connected to the control circuit board after being able to move in the thickness direction of the control circuit board inside the fitting hole. The inverter-integrated electric compressor described in 1.   The vibration isolation structure fixes the electrical component in contact with the planar portion, fixes the control circuit board in the inverter box in a state spaced from the electrical component, and 2. The inverter-integrated electric compressor according to claim 1, wherein a lead terminal of a component is electrically connected to the control circuit board, and the lead terminal is provided with an expandable / contractible shape.   The vibration isolation structure fixes the electrical component in contact with the planar portion, fixes the control circuit board in the inverter box in a state spaced from the electrical component, and A lead terminal of a component is once extended to the surface of the control circuit board opposite to the side where the electrical component is present, and then a U-turn portion is formed, and a portion on the tip side of the U-turn portion is disposed on the control circuit. The inverter-integrated electric compressor according to claim 1, wherein the electric compressor is electrically connected to a substrate.

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