Electric compressor and method for manufacturing same

Abstract

[Problem] To provide an electric compressor capable of improving the workability of assembling an inverter including a switching element. Technical means are that the electric compressor (1) comprises an inverter (3) having a switching element (5) and supplying power to the electric motor (2). Comprises: a stator housing (7) having a built-in electric motor (2); an inverter case (8) which is attached to an end wall (7A) of the stator case (7) and accommodates a circuit board (51) of the inverter (3); and an elastic body (71) attached to the inverter case (8), the switching element (5) being disposed on an end wall (7A) of the stator case (7), and the elastic body (71) pressing the switching element (5) against the end wall (7A) of the stator case (7) in a state in which the inverter case (8) is attached to the stator case (7).

Description

Technical Field

[0001] The present invention relates to an electric compressor including an inverter having a switching element and supplying power to a motor, and a method for manufacturing the same. Background Art

[0002] For example, as a refrigerant compressor used in an air conditioner of an electric vehicle, an inverter-integrated electric compressor including an inverter in a housing is used. In this case, a motor chamber for accommodating a motor and an inverter accommodating portion for accommodating the inverter separated from the motor chamber are formed in the housing of the electric compressor.

[0003] Moreover, the switching element (IGBT, etc.) of the inverter is arranged on the inverter housing side of the partition wall between the motor room and the inverter housing, and a structure such as that shown in patent document 1 is adopted: a leaf spring is pressed against the partition wall to fix the switching element to the partition wall, and the switching element is cooled by a low-temperature refrigerant flowing on the motor room side of the partition wall (refer to patent document 1). Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent No. 5644706 Summary of the invention Technical problem to be solved by the invention

[0005] However, conventionally, it is necessary to perform a cumbersome operation of placing the switch element on the partition wall of the housing, attaching the leaf spring to the partition wall, pressing and fixing the switch element to the partition wall of the housing, and then attaching the circuit board to the housing. Therefore, improvement is desired.

[0006] The present invention is made to solve the problems of the prior art, and an object of the present invention is to provide an electric compressor and a manufacturing method thereof, which can improve the assembly workability of an inverter including a switching element. Technical solutions adopted to solve technical problems

[0007] The electric compressor of the present invention includes an inverter having a switching element and supplying power to a motor, and is characterized in that it includes: a stator housing having a built-in motor; an inverter housing mounted on an end wall of the stator housing and accommodating a circuit substrate of the inverter; and an elastomer mounted on the inverter housing, wherein the switching element is arranged on the end wall of the stator housing, and the elastomer presses the switching element against the end wall of the stator housing when the inverter housing is mounted on the stator housing.

[0008] The electric compressor of the invention of technical solution 2 is characterized in that, in the above invention, an opening is formed on the bottom wall of the inverter shell corresponding to the end wall of the stator shell, the switching element is located in the opening, and the elastic body extends from the inverter shell toward the opening side to press the switching element against the end wall of the stator shell.

[0009] The electric compressor of the invention of claim 3 is characterized in that, in the above invention, it includes a sealing plate provided on the end wall of the stator housing and having a sealing pin, the sealing plate is also located in the opening, and the sealing pin is connected to the circuit board of the inverter.

[0010] The manufacturing method of the electric compressor of the invention of technical solution 4 is characterized in that, in technical solution 1, after an elastomer and a circuit substrate are installed on the inverter housing and a switching element is arranged on the end wall of the stator housing, the inverter housing is installed on the end wall of the stator housing, so that the switching element is pressed and fixed to the end wall of the stator housing by using the elastomer.

[0011] The manufacturing method of the electric compressor of the invention of technical solution 5 is characterized in that, in technical solution 2, an elastomer is installed on the bottom wall of the inverter housing so that it extends toward the opening side, and a circuit substrate is installed on the inverter housing. After a switching element is configured on the end wall of the stator housing, the inverter housing is installed on the end wall of the stator housing in a manner that the switching element is located in the opening, thereby using the elastomer to press and fix the switching element to the end wall of the stator housing.

[0012] The manufacturing method of the electric compressor of the invention of technical solution 6 is characterized in that, in technical solution 3, an elastomer is installed on the bottom wall of the inverter housing so that it extends toward the opening side, and a circuit substrate is installed on the inverter housing. After a switching element is configured on the end wall of the stator housing, the inverter housing is installed on the end wall of the stator housing in a manner that the switching element and the sealing plate are located in the opening, thereby using the elastomer to press and fix the switching element to the end wall of the stator housing.

[0013] The method for manufacturing an electric compressor according to the invention of claim 7 is characterized in that, in the above invention, the sealing pin is electrically connected to the circuit board by press fitting.

[0014] The method for manufacturing an electric compressor according to the invention of claim 8 is characterized in that, in the invention of any one of claims 4 to 7 , the switching element is electrically connected to the circuit board by press fitting. Effects of the Invention

[0015] According to the invention of claim 1 or claim 4, in the step of attaching the inverter case to the stator case, the switching element can be pressed and fixed to the stator case by the elastic body, thereby reducing the number of man-hours for assembly work and significantly improving productivity.

[0016] In particular, according to the invention of claim 2 or claim 5, since an opening is formed in the bottom wall of the inverter case, the switching element can be smoothly pressed and fixed to the stator housing by the elastic body by installing the inverter case in such a manner that the switching element is located in the opening.

[0017] In addition, according to the invention of Technical Solution 3 or Technical Solution 6, the sealing pin of the sealing plate can also be connected to the circuit substrate without obstacles, and according to the invention of Technical Solution 7 or Technical Solution 8, in the process of installing the inverter shell on the stator housing, the sealing pin of the sealing plate or the switching element can also be electrically connected to the circuit substrate, which can further improve productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of an electric compressor according to one embodiment of the present invention. Figure 2 yes Figure 1 Detailed cross-sectional view of the inverter housing portion of the electric compressor. Figure 3 yes Figure 1 A three-dimensional diagram of an electric compressor. Figure 4 yes Figure 3 Exploded perspective view of an electric compressor. Figure 5 yes Figure 3 Another exploded perspective view of the electric compressor. Figure 6 yes Figure 3 Another exploded perspective view of the electric compressor. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Figure 1 It is a schematic cross-sectional view of an electric compressor 1 according to one embodiment of the present invention.

[0020] The electric compressor 1 of the embodiment is used, for example, in the refrigerant circuit of an air-conditioning device for an electric vehicle, and sucks in a refrigerant as the working fluid of the air-conditioning device and discharges it to a discharge pipe after compression. It is a so-called horizontal inverter-integrated scroll electric compressor, which includes: a three-phase electric motor 2 as the motor of the present invention; an inverter 3 for operating the electric motor 2; and a scroll compression mechanism 4 as a compression mechanism driven by the electric motor 2.

[0021] The electric compressor 1 of the embodiment includes: a stator housing 7, which accommodates an electric motor 2 and a center housing 6 on the inside; an inverter housing 8, which is installed on the end wall 7A of one end side of the stator housing 7 and accommodates the inverter 3 on the inside thereof; and a rear housing 9, which is installed on the other end side of the stator housing 7.

[0022] The stator housing 7 , the inverter housing 8 , and the rear housing 9 are all made of metal (aluminum in the embodiment), and are integrally joined to form a housing 11 of the electric compressor 1 of the embodiment.

[0023] A motor chamber 12 for accommodating the electric motor 2 is formed in the stator housing 7, and one end face of the motor chamber 12 is basically closed by the end wall 7A of the stator housing 7. Moreover, the end wall 7A serves as a partition wall for partitioning the motor chamber 12 and the inverter accommodating portion 13 described later. The other end face of the motor chamber 12 is open, and after the electric motor 2 is accommodated in the opening, the center housing 6 is accommodated. In addition, a sub-bearing 16 is installed on the inner surface (motor chamber 12 side) of the end wall 7A, and the sub-bearing 16 is used to rotatably support one end of the drive shaft 14 of the electric motor 2.

[0024] The center casing 6 is opened on the side opposite to the electric motor 2 (the other end side). After accommodating the movable scroll 22 described later of the scroll compression mechanism 4, the opening is closed by being fixed to the stator casing 7 through the rear shell 9, on which the fixed scroll 21 of the scroll compression mechanism 4, also described later, is fixed.

[0025] In addition, a through hole 17 is opened on the center casing 6 for inserting the other end of the driving shaft 14 of the electric motor 2, and a main bearing 18 is installed in the center casing 6 on the side of the scroll compression mechanism 4 of the through hole 17. The main bearing 18 can rotatably support the other end of the driving shaft 14 on the side of the scroll compression mechanism 4.

[0026] The electric motor 2 is composed of a stator 25 and a rotor 23. The stator 25 is fixed to the inner side of the peripheral wall of the stator housing 7 and has a coil wound thereon. The rotor 23 rotates therein. For example, a direct current from a battery (not shown) of the vehicle is converted into a three-phase alternating current by the inverter 3, and the coil of the stator 25 of the electric motor 2 is supplied with power, thereby driving the rotor 23 to rotate. The drive shaft 14 is fixed to the rotor 23.

[0027] In addition, a suction port 21 is formed on the stator housing 7. The refrigerant sucked from the suction port 21 flows into the center housing 6 after passing through the electric motor 2 in the stator housing 7, and is sucked by the suction portion 37 outside the scroll compression mechanism 4. Thus, the electric motor 2 is cooled by the sucked refrigerant. In addition, the refrigerant compressed by the scroll compression mechanism 4 is configured to be discharged from the discharge chamber 27 described later through the discharge port 20 formed in the rear housing 9 to the discharge piping of the refrigerant circuit (not shown) outside the housing 11.

[0028] The scroll compression mechanism 4 is composed of the aforementioned fixed scroll 21 and movable scroll 22. The fixed scroll 21 integrally includes a disc-shaped mirror plate 23 and a scroll-shaped surround 24, and the surround 24 is composed of an involute shape or a curve close to an involute shape erected on the surface (one side) of the mirror plate 23, and the surface of the mirror plate 23 on which the surround 24 is erected is fixed to the rear shell 9 as the center casing 6 side. A discharge hole 26 is formed in the center of the mirror plate 23 of the fixed scroll 21, and the discharge hole 26 is connected to the discharge chamber 27 in the rear shell 9. In the figure, the symbol 28 is a discharge valve provided at the opening on the back side (the other side) of the mirror plate 23 of the discharge hole 26.

[0029] The movable scroll 22 is a scroll that revolves and swirls relative to the fixed scroll 21, and integrally includes: a disc-shaped mirror plate 31; a spiral-shaped surround 32, which is composed of an involute shape or a curve that is approximately involute and is erected on the surface (one side) of the mirror plate 31; and a sleeve portion 33, which is protruded and formed at the center of the back side (the other side) of the mirror plate 31. The movable scroll 22 is configured so that the protruding direction of the surround 32 is set to the fixed scroll 21 side and the surround 32 is opposite to the surround 24 of the fixed scroll 21, so that they face each other and mesh with each other, and a pressure chamber 34 is formed between each surround 24, 32.

[0030] That is, the surround 32 of the movable scroll 22 is opposite to the surround 24 of the fixed scroll 21, and the front end of the surround 32 is in contact with the surface of the mirror plate 23, and the front end of the surround 24 is in contact with the surface of the mirror plate 31. The eccentric portion 36 is fitted on the sleeve portion 33 of the movable scroll 22, and the eccentric portion 36 is eccentrically provided from the axis at the other end of the drive shaft 14. Moreover, when the drive shaft 14 rotates together with the rotor 23 of the electric motor 2, the movable scroll 22 does not rotate on its own, but revolves and swirls relative to the fixed scroll 21.

[0031] Since the movable scroll 22 is eccentric to the fixed scroll 21 and revolves and swirls, the eccentric direction and contact position of each surround 24, 32 rotate and move, and the pressure chamber 34 that sucks the refrigerant from the suction portion 37 on the outside moves inward and gradually shrinks. As a result, the refrigerant is compressed and finally discharged from the discharge hole 26 in the center to the discharge chamber 27 via the discharge valve 28.

[0032] exist Figure 1In FIG. 4 , reference numeral 38 is a circular thrust plate. The thrust plate 38 is used to partition a back pressure chamber 39 and a suction portion 37 on the outside of the scroll compression mechanism 4, and is located on the outside of the sleeve portion 33 and sandwiched between the center casing 6 and the movable scroll 22. The back pressure chamber 39 is formed between the back side of the mirror plate 31 of the movable scroll 22 and the center casing 6. Reference numeral 41 is a seal member mounted on the back side of the mirror plate 31 of the movable scroll 22 and abutting against the thrust plate 38. The back pressure chamber 39 and the suction portion 37 are partitioned by the seal member 41 and the thrust plate 38.

[0033] In addition, reference numeral 48 denotes a centrifugal oil separator installed in the discharge chamber 27 of the rear housing 9 (housing 11). The oil separator 48 separates the lubricating oil mixed in the refrigerant discharged from the scroll compression mechanism 4 to the discharge chamber 27 from the refrigerant. An inlet 49 is formed in the oil separator 48, and the refrigerant containing oil flowing in from the inlet 49 swirls in the oil separator 48. The centrifugal force at this time separates the oil, and the refrigerant is discharged to the discharge pipe from the outflow port at the upper end toward the discharge port 20 as described above.

[0034] An oil storage chamber 44 is formed on the rear shell 9 below the oil separator 48, and the oil separated from the refrigerant by the oil separator 48 flows into the oil storage chamber 44 from the lower end of the oil separator 48. In the figure, the symbol 43 is a back pressure passage formed from the rear shell 9 to the center casing 6. The back pressure passage 43 is a path that connects the oil separator 48 in the discharge chamber 27 (discharge side of the scroll compression mechanism 4) in the rear shell 9 with the back pressure chamber 39, and has a throttle hole 50 in the embodiment. Thus, it is configured that the discharge pressure that is reduced and regulated by the throttle hole 50 of the back pressure passage 43 is supplied to the back pressure chamber 39 together with the oil in the oil storage chamber 44 separated by the oil separator 48.

[0035] The pressure (back pressure) in the back pressure chamber 39 generates a back pressure load that presses the movable scroll 22 against the fixed scroll 21. The back pressure load overcomes the compression reaction force of the pressure chamber 34 of the scroll compression mechanism 4 and presses the movable scroll 22 against the fixed scroll 21, maintaining the contact between the surrounds 24, 32 and the mirror plates 31, 23, and compressing the refrigerant through the pressure chamber 34.

[0036] On the other hand, the inverter case 8 is composed of a case body 10, the case body 10 constituting an inverter housing portion 13 inside, and a cover member 15 closing an opening of one end surface of the case body 10. A circuit substrate 51 of the inverter 3, which will be described later, is housed in the inverter housing portion 13, and the cover member 15 is attached to the case body 10 after the inverter 3 is housed in the inverter housing portion 13.

[0037] Next, refer to Figure 2 , Figure 3, the detailed structure of the inverter 3 and the surroundings of the electric compressor 1 of the embodiment will be described. Figure 2 Hereinafter, the electric compressor 1 will be shown in a state where the inverter case 8 side is on the upper side. Figure 2 is a detailed cross-sectional view of the inverter housing 8 of the electric compressor 1, Figure 3 It is a perspective view of the electric compressor 1. The inverter 3 of the embodiment is configured by mounting a control circuit on a circuit board 51, and connecting switching elements 5 (six IGBTs in the embodiment), a smoothing capacitor, and the like.

[0038] Here, a sealing plate 52 is mounted on the end wall 7A (partition wall) of the stator housing 7, and a conductive sealing pin 53 is mounted on the sealing plate 52. In this case, Figure 4 , Figure 5 As shown, three seal pins 53 are installed corresponding to each phase (three phases) of the electric motor 2. One end of each seal pin 53 penetrates the end wall 7A into the motor chamber 12 and is connected to the coil of the stator 25 of the electric motor 2.

[0039] On the other hand, an opening 54 is formed on the bottom wall 10A of the shell body 10 of the inverter shell 8 corresponding to the end wall 7A of the stator shell 7. When the inverter shell 8 is installed on the end wall 7A of the stator shell 7, the sealing plate 52 and the sealing pin 53 are located in the opening 54 and face the inverter housing 13, and the other end side of each sealing pin 53 is shaped to stand up in the inverter housing 13.

[0040] In addition, three metal press-fit terminals 56 called power baskets are mounted on the circuit substrate 51 at positions corresponding to the other end sides of the sealing pins 53, and the other end sides of the sealing pins 53 are inserted into the press-fit terminals 56 and press-fitted with the press-fit terminals 56. Thus, each sealing pin 53 is electrically connected to the circuit substrate 51.

[0041] On the other hand, the switching element 5 is arranged on the surface of the outer side (the side opposite to the motor chamber 12) of the end wall 7A of the stator housing 7 in a heat exchange relationship with the end wall 7A via the insulating member 30 (insulating sheet). Thus, each switching element 5 is cooled by the refrigerant sucked into the motor chamber 12 via the end wall 7A. That is, the stator housing 7 (end wall 7A) serves as a heat sink for the switching element 5.

[0042] Here, in the embodiment, six switch elements 5 are arranged in two rows of three each. Each switch element 5 has three terminals 5A, and the terminals 5A stand from each switch element 5 in a direction away from the end wall 7A.

[0043] When the inverter housing 8 is mounted on the end wall 7A of the stator housing 7, each switching element 5 is located in the opening 54 and faces the inverter housing 13, and the terminal 5A of each switching element 5 is in a state of standing in the inverter housing 13. In addition, terminal connection holes 68 are formed on the circuit substrate 51 at positions corresponding to the terminals 5A, and the terminals 5A are inserted into the terminal connection holes 68. Moreover, the terminals 5A of each switching element 5 are electrically connected to the circuit substrate 51.

[0044] In the drawings, reference numerals 71 and 72 denote elastic bodies for fixing the switching elements 5 to the end wall 7A of the stator housing 7. The elastic bodies 71 and 72 are each composed of a cover 73 and 74 ( Figure 2 ) and three disc springs 76 installed at the front end of each cover 73, 74.

[0045] Furthermore, the base of the cover 73, 74 of each elastic body 71, 72 is screwed to the bottom wall 10A near the opening 54 formed in the shell body 10. In this state, the cover 73, 74 of each elastic body 71, 72 extends toward the opening 54, and the three disc springs 76 at their front ends press the three switch elements 5 of each row toward the end wall 7A. As a result, each switch element 5 is pressed and fixed to the end wall 7A of the stator housing 7 ( Figure 2 ).

[0046] Next, refer to Figures 4 to 6 , the assembly sequence of the electric compressor 1 when assembling the inverter 3 is described. The terminal connection holes 68 are formed on the circuit substrate 51, and the press-fit terminals 56 are also installed. In addition, the opening 54 is formed so that when the inverter case 8 is mounted on the stator housing 7, the sealing plate 52 is located in the opening 54.

[0047] First, as described above, the elastic bodies 71 and 72 are mounted on the bottom wall 10A of the case body 10 so that the covers 73 and 74 extend toward the opening 54. Figure 4 As shown by the blank arrows in the middle, the circuit board 51 is mounted on the case body 10. When the inverter case 8 is mounted on the stator housing 7, the switching elements 5 are arranged in two rows on the end wall 7A located in the opening 54 as described above.

[0048] Then, if Figure 5 As shown by the blank arrows in the figure, the case body 10 to which the elastic bodies 71, 72 and the circuit substrate 51 are mounted as described above is fixed to the end wall 7A of the stator housing 7 by bolts. At this time, the switching elements 5 face the inverter accommodating portion 13 from the opening 54, and the coil springs 76 of the elastic bodies 71, 72 are respectively in contact with the switching elements 5. Moreover, the coil springs 76 are compressed by the elastic bodies 71, 72, and the switching elements 5 are pressed and fixed to the end wall 7A of the stator housing 7.

[0049] In addition, the terminal 5A of each switching element 5 is respectively inserted into the terminal connection hole 68 of the circuit substrate 51. In addition, in the embodiment, each terminal 5A is electrically connected to the circuit substrate 51 by welding.

[0050] In addition, the sealing plate 52 and each sealing pin 53 also face the inside of the inverter housing 13 from the opening 54, and each sealing pin 53 is pressed into (press-fitted) each press-fit terminal 56 of the circuit substrate 51 to be electrically connected to the circuit substrate 51. That is, the sealing pin 53 is electrically connected to the circuit substrate 51 by press-fitting.

[0051] In this way, after the case body 10 of the inverter case 8 is mounted on the end wall 7A of the stator housing 7, as shown in FIG. Figure 6 As shown by the blank arrow in the figure, the cover member 15 is mounted on the shell body 10 by bolting. Figure 3 shown.

[0052] As described in detail above, in the present invention, in an electric compressor 1 including an inverter 3 having a switching element 5 and supplying power to an electric motor 2, there are provided: a stator housing 7 which houses the electric motor 2; an inverter housing 8 which is mounted on the end wall 7A of the stator housing 7 and accommodates the circuit substrate 51 of the inverter 3; and elastomers 71 and 72 which are mounted on the inverter housing 8 and which configure the switching element 5 on the end wall 7A of the stator housing 7, and the elastomers 71 and 72 press the switching element 5 against the end wall 7A of the stator housing 7 when the inverter housing 8 is mounted on the stator housing 7.

[0053] Thus, in the step of attaching the inverter case 8 to the stator housing 7 , the switching element 5 can be pressed and fixed to the end wall 7A of the stator housing 7 by the elastic bodies 71 , 72 , thereby reducing the number of man-hours for assembly work and significantly improving productivity.

[0054] In particular, in the embodiment, an opening 54 is formed on the bottom wall 10A of the shell body 10 of the inverter shell 8 corresponding to the end wall 7A of the stator housing 7, so that the switching element 5 is located in the opening 54, and the elastomers 71 and 72 extend from the shell body 10 of the inverter shell 8 toward the opening 54 side to press the switching element 5 against the end wall 7A of the stator housing 7. Therefore, by installing the inverter shell 8 in a manner such that the switching element 5 is located in the opening 54, the switching element 5 can be smoothly pressed and fixed to the end wall 7A of the stator housing 7 by using the elastomers 71 and 72.

[0055] In addition, the sealing plate 52 provided on the end wall 7A of the stator housing 7 is also located in the opening 54, and the sealing pin 53 is connected to the press-fit terminal 56 of the circuit substrate 51 of the inverter 3. Therefore, in the process of installing the inverter shell 8 on the stator housing 7, the connection between the sealing pin 53 of the sealing plate 52 and the circuit substrate 51 can also be carried out without obstacles, which can achieve further improvement in productivity.

[0056] In the embodiment, the terminals 5A are inserted into the terminal connection holes 68 and then welded during the process of installing the inverter case 8 . However, the present invention is not limited thereto, and the terminals 5A of the switching elements 5 may be electrically connected to the circuit board 51 by press fitting.

[0057] In this case, the terminal 5A of each switching element 5 is composed of a press-fit terminal. In addition, a conductive terminal is provided on the inner wall of each terminal connection hole 68. In addition, in the process of mounting the inverter case 8 on the end wall 7A of the stator housing 7, each terminal 5A is inserted into each terminal connection hole 68 and is press-fitted (press-fitted) with the terminal connection hole 68, thereby electrically connecting the terminal 5A of each switching element 5 to the circuit substrate 51.

[0058] Alternatively, the terminal 5A of the switch element 5 may be constituted by a normal terminal, and on the other hand, a press-fit terminal may be provided in each terminal connection hole 68 of the circuit substrate 51, and each terminal 5A of the switch element 5 may be pressed into (press-fitted) the press-fit terminal, thereby electrically connecting the terminal 5A to the circuit substrate 51. In this way, further improvement in productivity can be achieved.

[0059] In addition, in the embodiment, the elastic bodies 71 and 72 are composed of the covers 73 and 74 and the coil spring 76, but are not limited to this, and various elastic members that extend from the bottom wall 10A of the case body 10 to the opening 54 side and can press the switch element 5 against the end wall 7A can be used. That is, the specific shapes of the various members shown in the embodiment are not limited to these, and can be changed within the scope of the subject matter of the present invention. Explanation of symbols

[0060] 1 electric compressor; 2 Electric motor (motor); 3. Inverter; 4 Scroll compression mechanism (compression mechanism); 5. Switching elements; 5A terminal; 7 stator housing; 7A end wall (dividing wall); 8 Inverter housing; 10 Shell body; 10A bottom wall; 11 housing; 12 Motor room; 13 inverter housing; 51 circuit substrate; 52 sealing plate; 53 Sealing pin; 54 opening; 56 press-fit terminals; 68 terminal connection hole; 71, 72 elastomer; 73, 74 hood; 76 coil spring.

Claims

1. An electric compressor, The invention comprises an inverter having a switching element and supplying power to a motor, wherein: The electric compressor includes: a stator housing in which the motor is housed; an inverter housing mounted on an end wall of the stator housing and accommodating a circuit substrate of the inverter; and an elastic body, which is mounted on the inverter housing, The switch element is arranged on the end wall of the stator housing, Furthermore, the elastic body presses the switching element against the end wall of the stator housing when the inverter housing is mounted on the stator housing.

2. The electric compressor according to claim 1, characterized in that: An opening is formed on the bottom wall of the inverter housing corresponding to the end wall of the stator housing. The switching element is located in the opening, and the elastic body extends from the inverter case toward the opening side to press the switching element against the end wall of the stator housing.

3. The electric compressor according to claim 2, characterized in that: comprising a sealing plate, which is arranged on the end wall of the stator housing and has a sealing pin, The sealing plate is also located in the opening, and the sealing pin is connected to the circuit substrate of the inverter.

4. A method for manufacturing an electric compressor, characterized in that: The method for manufacturing the electric compressor according to claim 1, The elastic body and the circuit substrate are mounted on the inverter housing. After the switch element is arranged on the end wall of the stator housing, By mounting the inverter housing on the end wall of the stator housing, the switching element is pressed and fixed to the end wall of the stator housing by the elastic body.

5. A method for manufacturing an electric compressor, characterized in that: The method for manufacturing the electric compressor according to claim 2, The elastic body is mounted on the bottom wall of the inverter housing so as to extend toward the opening side, and the circuit substrate is mounted on the inverter housing. After the switch element is arranged on the end wall of the stator housing, The inverter case is mounted on the end wall of the stator housing in such a manner that the switching element is located in the opening, so that the switching element is pressed and fixed to the end wall of the stator housing by the elastic body.

6. A method for manufacturing an electric compressor, characterized in that: The method for manufacturing the electric compressor according to claim 3, The elastic body is mounted on the bottom wall of the inverter housing so as to extend toward the opening side, and the circuit substrate is mounted on the inverter housing. After the switch element is arranged on the end wall of the stator housing, The inverter case is mounted on the end wall of the stator housing in such a manner that the switching element and the sealing plate are located in the opening, so that the switching element is pressed and fixed to the end wall of the stator housing by the elastic body.

7. The method for manufacturing an electric compressor according to claim 6, characterized in that: The sealing pin is electrically connected to the circuit substrate by press fitting.

8. The method for manufacturing an electric compressor according to any one of claims 4 to 7, characterized in that: The switching element is electrically connected to the circuit substrate by press fitting.

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