阅读说明：本技术 逆变器一体型气体供给装置 (Inverter-integrated gas supply device ) 是由 池谷信之 佐佐木裕司 谷口雅哉 桑田严 大桥聪 于 2020-03-17 设计创作，主要内容包括：本公开涉及逆变器一体型气体供给装置。电动增压机(1)具备马达(4)和逆变器(5)。马达(4)具有接受驱动电流的马达侧连接部(71)。逆变器(5)具有逆变器侧连接部(81),上述逆变器侧连接部(81)与马达侧连接部(71)连接,并且将驱动电流向马达侧连接部(71)提供。马达侧连接部(71)包括：销外壳(72),其固定于马达壳(43)；销(73),其接受驱动电流；以及衬垫(77),其被夹持于销外壳(72)与销(73)之间。(The present disclosure relates to an inverter-integrated gas supply device. The electric supercharger (1) is provided with a motor (4) and an inverter (5). The motor (4) has a motor-side connection section (71) that receives a drive current. The inverter (5) has an inverter-side connection section (81), and the inverter-side connection section (81) is connected to the motor-side connection section (71) and supplies a drive current to the motor-side connection section (71). The motor-side connecting portion (71) includes: a pin housing (72) fixed to the motor case (43); a pin (73) that receives a drive current; and a gasket (77) sandwiched between the pin housing (72) and the pin (73).)

1. An inverter-integrated gas supply device, comprising:

a motor having a motor housing and driving a fluid machine that discharges air;

an inverter having an inverter case and supplying a driving current for controlling a rotation speed of the motor to the motor;

a motor-side connecting portion that is attached to the motor case and receives the drive current; and

an inverter-side connecting portion that is attached to the inverter case, is connected to the motor-side connecting portion, and supplies the driving current to the motor-side connecting portion,

the motor-side connecting portion has: a motor-side connector housing fixed to the motor case; a motor connector disposed in the motor-side connector housing and receiving a drive current from the inverter-side connection portion; and a1 st sealing member sandwiched between the motor-side connector housing and the motor connector.

2. The inverter-integrated gas supply apparatus according to claim 1,

the motor connector further includes a2 nd sealing member sandwiched between the motor case and the motor side connector housing.

3. The inverter-integrated gas supply apparatus according to claim 1 or 2,

the motor drive device further includes a 3 rd sealing member sandwiched between the motor case and the inverter case.

4. The inverter-integrated gas supply apparatus according to any one of claims 1 to 3,

the inverter-side connecting portion includes: an inverter-side connector housing fixed to the inverter case; and an inverter connector which is disposed in the inverter-side connector housing and supplies a drive current to the motor connector,

the relative position of the motor connector with respect to the motor-side connector housing is fixed,

the relative position of the inverter connector with respect to the inverter-side connector housing is variable.

Technical Field

The present disclosure relates to an inverter-integrated gas supply device.

Background

Patent documents 1, 2, and 3 disclose devices having a motor and an inverter. Patent document 1 discloses a cooling structure. The cooling structure of patent document 1 appropriately cools the motor and the inverter. Patent document 2 discloses a device that eliminates a pressure difference between the inside and the outside of the motor case. Further, the device of patent document 2 prevents water from entering the inside of the motor case. Patent document 3 discloses a structure in which an inverter housing portion is detachably coupled to a motor housing portion.

Patent document 1: japanese patent laid-open publication No. 2005-20881

Patent document 2: japanese laid-open patent publication No. H08-65945

Patent document 3: japanese patent laid-open publication No. 2016-92933

The motor rotates based on a drive current supplied by the inverter. In a device including an electric circuit such as an inverter, it is necessary to suppress the intrusion of water into the device in order to stably operate the electric circuit. On the other hand, the motor has an electrical connection structure for receiving a driving current. Also, the inverter has an electrical connection structure for supplying a driving current. The portion electrically connecting the inverter and the motor also needs to reliably suppress the intrusion of water into the inverter.

Disclosure of Invention

The present disclosure describes an inverter-integrated gas supply device that can suppress the intrusion of water into the interior of an inverter.

An inverter-integrated gas supply device according to an aspect of the present disclosure includes: a motor having a motor housing and driving a fluid machine that discharges air; an inverter having an inverter case and supplying a driving current for controlling a rotation speed of the motor to the motor; a motor-side connecting portion that is attached to the motor case and receives a drive current; and an inverter-side connecting portion that is attached to the inverter case, is connected to the motor-side connecting portion, and supplies a driving current to the motor-side connecting portion. The motor-side connecting portion includes: a motor-side connector housing fixed to the motor case; a motor connector which is disposed in the motor-side connector housing and receives a drive current from the inverter-side connection portion; and a1 st sealing member sandwiched between the motor-side connector housing and the motor connector.

According to the inverter-integrated gas supply device of the present disclosure, water can be inhibited from entering the inverter.

Drawings

Fig. 1 is a diagram for explaining an electric supercharger according to an embodiment.

Fig. 2 is a perspective view showing a structure for securing electrical connection.

Fig. 3 is a sectional perspective view showing the inside of the structure for securing electrical connection.

Fig. 4 is an enlarged perspective view of the mounting structure of the receptacle housing provided in the inverter-side connecting portion having the structure for ensuring the electrical connection shown in fig. 2.

Fig. 5 is an enlarged perspective view of the watertight structure.

Detailed Description

An inverter-integrated gas supply device according to an aspect of the present disclosure includes: a motor having a motor housing and driving a fluid machine that discharges air; an inverter having an inverter case and supplying a driving current for controlling a rotation speed of the motor to the motor; a motor-side connecting portion that is attached to the motor case and receives a drive current; and an inverter-side connecting portion that is attached to the inverter case, is connected to the motor-side connecting portion, and supplies a driving current to the motor-side connecting portion. The motor-side connecting portion includes: a motor-side connector housing fixed to the motor case; a motor connector which is disposed in the motor-side connector housing and receives a drive current from the inverter-side connection portion; and a1 st sealing member sandwiched between the motor-side connector housing and the motor connector.

In this device, the inverter is electrically connected to the motor through the motor-side connection portion and the inverter-side connection portion. The motor-side connecting portion includes a1 st sealing member. The 1 st sealing member is sandwiched between the motor connector and the motor-side connector housing. The 1 st sealing member ensures a watertight state of the motor-side connecting portion. In other words, the 1 st sealing member hinders the movement of water via the motor-side connecting portion. Therefore, the intrusion of water into the inverter can be suppressed.

In one aspect, the inverter-integrated gas supply device may further include a2 nd sealing member interposed between the motor case and the motor-side connector housing. The 2 nd sealing member ensures a watertight state between the motor case and the motor side connector housing. In other words, the 2 nd sealing member hinders the movement of water via between the motor housing and the motor-side connecting portion. Therefore, the intrusion of water into the inverter can be further suppressed.

In one aspect, the inverter-integrated gas supply device may further include a 3 rd sealing member interposed between the motor case and the inverter case. The 3 rd sealing member ensures a watertight state between the motor case and the inverter case. In other words, the 3 rd sealing member blocks the movement of water between the motor housing and the inverter housing. Therefore, the intrusion of water into the inverter can be further suppressed.

In one aspect, the inverter-side connection portion may include: an inverter-side connector housing fixed to the inverter case; and an inverter connector which is disposed in the inverter-side connector housing and supplies a driving current to the motor connector. The relative position of the motor connector with respect to the motor-side connector housing may be fixed. The relative position of the inverter connector with respect to the inverter-side connector housing may be variable. According to this structure, the relative position of the inverter connector is variable. As a result, the inverter connector can move relative to the inverter-side connector housing according to the position of the motor connector. Therefore, in a state where the inverter case is fixed to the motor case, the allowable deviation of the inverter connector with respect to the motor connector can be increased.

Hereinafter, the form of the inverter-integrated gas supply apparatus for implementing the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

An electric supercharger 1 (inverter-integrated gas supply device) shown in fig. 1 will be described. The motor-driven supercharger 1 as an example of the centrifugal compressor is used in the fuel cell system 100, for example. The type of the fuel cell system 100 is not particularly limited. The Fuel Cell system 100 may be, for example, a Polymer Electrolyte Fuel Cell (PEFC). The Fuel Cell system 100 may be a Phosphoric Acid Fuel Cell (PAFC) or the like.

The electric supercharger 1 includes a turbine 2 (fluid machine), a compressor 3 (fluid machine), a motor 4, and an inverter 5. The turbine 2, the compressor 3, and the motor 4 are coupled to each other by a rotating shaft S. The turbine 2 is provided at the 1 st end of the rotating shaft S. The compressor 3 is provided at the 2 nd end of the rotating shaft S. The motor 4 is provided between the turbine 2 and the compressor 3.

The air G1 is a gas compressed by the compressor 3. The air G1 is supplied to the fuel cell system 100 connected to the electric supercharger 1. The fuel cell system 100 produces a chemical reaction of a fuel and an oxidant. By this chemical reaction, air G2 containing water vapor and electricity are generated. The fuel cell system 100 supplies air G2 to the turbine 2.

The fuel cell system 100 discharges the high-temperature air G2. The electric supercharger 1 drives the turbine 2 using air G2. As a result of the driving of the turbine 2, the compressor 3 is driven. The compressor 3 supplies air G1 to the fuel cell system 100. Further, most of the driving force of the compressor 3 may be provided by the motor 4. That is, the electric supercharger 1 may be driven by a motor.

The fuel cell system 100 and the electric supercharger 1 are mounted on a vehicle such as an electric vehicle. Further, the electric power output from the fuel cell system 100 may be supplied to the motor 4 of the electric supercharger 1. Further, the motor 4 of the electric supercharger 1 may be supplied with electric power from a power supply device different from the fuel cell system 100.

The electric supercharger 1 will be described in more detail below.

The turbine 2 has a turbine wheel 21 and a turbine housing 22. The turbine wheel 21 is provided at the 1 st end of the rotating shaft S. The compressor 3 has a compressor wheel 31 and a compressor housing 32. The compressor impeller 31 is provided at the 2 nd end of the rotating shaft S. Further, a nozzle may be disposed on the turbine 2 side. A diffuser may be disposed on the compressor 3 side.

The motor case 43 (motor housing) is provided between the turbine housing 22 and the compressor housing 32. The rotation shaft S is rotatably supported by the motor case 43 via a bearing B.

The turbine housing 22 has an intake portion 22a and a discharge portion 22 b. The fuel cell system 100 discharges the air G2 containing water vapor. The air G2 flows from the intake portion 22a into the turbine housing 22. The air G2 having flowed in passes through the flow path 22c and is then supplied to the turbine wheel 21. The turbine wheel 21 is, for example, a radial turbine. The turbine wheel 21 converts fluid energy of the supplied air G2 into rotational energy. Thereafter, the air G2 is discharged from the discharge portion 22 b.

The compressor housing 32 has a suction portion 32a and a discharge portion 32b. When the turbine impeller 21 rotates, the rotation shaft S and the compressor impeller 31 rotate. The rotating compressor wheel 31 takes in air G3 from the intake portion 32a. The compressor wheel 31 compresses the air G3. Then, the compressor wheel 31 discharges the compressed air G1. The air G1 passes through the flow path 32c and is then discharged from the discharge portion 32b. The air G1 discharged from the discharge portion 32b is supplied to the fuel cell system 100. The gas compressed by the compressor 3 is not limited to air.

The motor 4 is, for example, a brushless ac motor. The motor 4 has a rotor 41 as a rotating member and a stator 42 as a stationary member. The rotor 41 includes one or more magnets. The rotor 41 fixed to the rotation shaft S is rotatable around the shaft together with the rotation shaft S. The rotor 41 is disposed in the center of the rotating shaft S in the axial direction. The "central portion" means a substantially central portion in the axial direction. In other words, it does not mean the center of the exact meaning. For example, the rotor 41 may be disposed close to the turbine 2. The rotor 41 may be disposed close to the compressor 3. The stator 42 has a plurality of coils and cores. The stator 42 surrounds the rotor 41 around the circumferential direction of the rotation axis S. The stator 42 generates a magnetic field around the rotation axis S. The stator 42 rotates the rotor 41 by engaging with the rotor 41.

The inverter 5 supplies the motor 4 with a drive current for controlling the rotation speed of the motor 4. The inverter 5 has an inverter case 51 (inverter case) and an inverter circuit 52.

The electric supercharger 1 has a cooling system. The cooling system is used for the motor 4 and the inverter 5. The electric supercharger 1 has a heat exchanger 9. The electric supercharger 1 may omit the heat exchanger 9 depending on the usage. The motor 4 has flow paths 46a, 46b, and 46c and cooling units 45 and 47. The cooling unit 45 cools the stator 42. The cooling unit 47 cools the bearing B. The flow path 46a is connected to the heat exchanger 9. The flow path 46a receives the cooling water C from the heat exchanger 9. The flow path 46a supplies the cooling water C to the cooling unit 47. The flow path 46b connects the cooling unit 45 to the cooling unit 47. The flow path 46b receives the cooling water C flowing out from the cooling unit 47. The flow path 46b supplies the received cooling water C to the cooling unit 45. The flow path 46c connects the cooling unit 45 to a cooling water connection structure 6 described later. The flow path 46C receives the cooling water C flowing out from the cooling unit 45. The flow path 46C supplies the received cooling water C to the cooling water connection structure 6.

The inverter 5 includes a cooling unit 53 and flow paths 54a and 54b. The cooling unit 53 cools the inverter circuit 52. The flow path 54a connects the cooling water connection structure 6 to the cooling unit 53. The flow path 54a receives the cooling water C flowing out from the cooling water connection structure 6. The flow path 54a supplies the received cooling water C to the cooling unit 53. The flow path 54b is connected to the cooling unit 53. The flow path 54b receives the cooling water C flowing out from the cooling unit 53. The flow path 54b discharges the received cooling water C to the outside of the inverter case 51.

Hereinafter, a connection structure between the motor 4 and the inverter 5 will be described in more detail.

The inverter case 51 is fixed to the motor case 43 by a stud bolt or the like. The electric supercharger 1 has a cooling water connection structure 6 and an electric connection structure 7. The cooling water connection structure 6 receives and discharges the cooling water C as a refrigerant. The electrical connection structure 7 receives and outputs a drive current. These connection structures do not use a connection member such as a pipe or a wire for connecting the inverter 5 to the motor 4. In other words, the inverter case 51 is attached to the motor case 43, thereby constituting the cooling water connection structure 6 and the electrical connection structure 7.

< connecting structure of cooling water >

The cooling water connection structure 6 has a joint portion 61. The interface 61 is provided on the connection surface 43S of the motor case 43. The interface 61 is a flat surface. The interface portion 61 slightly protrudes from the connection surface 43S. The port 61 is formed with an opening as an end of the flow path 46c. Therefore, the cooling water C flowing inside the motor 4 is discharged from the opening.

The cooling water connection structure 6 has a joint portion 62. The interface 62 is provided on the connection surface 51S of the inverter case 51. The interface 62 is a flat surface. The interface portion 62 is slightly recessed from the connection surface 51S. The port 62 is formed with an opening as an end of the flow path 54 a.

The cooling water connection structure 6 has a gasket 63. The gasket 63 is sandwiched between the connecting port portion 61 and the connecting port portion 62. The packing 63 surrounds the opening of the flow path 54 a. The gasket 63 is disposed in a groove provided in the interface 62.

When the inverter case 51 is attached to the motor case 43, the interface part 62 of the inverter case 51 is fitted into the interface part 61 of the motor case 43. The interface 61 slightly presses and deforms the gasket 63. As a result, water tightness is ensured by the deformed packing 63 between the connecting ports 61 and 62. In other words, the cooling water C can be received and discharged between the motor 4 and the inverter 5. According to such a connection structure, the inverter case 51 can be connected to the motor case 43 without using a connection member such as a pipe. Therefore, the inverter 5 can be easily attached to the motor 4. In addition, no connecting member is required. As a result, the manufacturing cost of the electric supercharger 1 can be reduced.

< Electrical connection Structure >

As shown in fig. 2, the electrical connection structure 7 has a motor-side connection portion 71 and an inverter-side connection portion 81. The motor-side connecting portion 71 is fixed to the motor case 43. Similarly, the inverter-side connecting portion 81 is fixed to the inverter case 51. The inverter 5 is electrically connected to the motor 4 by inserting the inverter-side connection portion 81 into the motor-side connection portion 71. According to this structure, the connection between the motor-side connection portion 71 and the inverter-side connection portion 81 can be secured by coupling the motor case 43 and the inverter case 51 to each other. In other words, the inverter case 51 can be connected to the motor case 43 without a connecting member such as a cable. Therefore, the inverter 5 can be more easily attached to the motor 4. In addition, no connecting member is required. As a result, the manufacturing cost of the electric supercharger 1 can be further reduced.

As shown in fig. 3, the motor-side connecting portion 71 has a pin housing 72 (motor-side connector housing) and a plurality of pins 73 (motor connectors). Pin housing 72 has a main body 74 and a flange 75. The body 74 houses a plurality of pins 73. Further, the number of the pins 73 may be appropriately selected according to specifications. Fig. 3 illustrates a structure having three pins 73 as an example. The flange 75 has a pair of bolt holes 75a (see fig. 2). The pin housing 72 is fixed to the motor case 43 by a bolt 75b inserted through the bolt hole 75a. The pin 73 has a pin tip 73a, a large diameter portion 73b, and a cable connection end 73c. The pin tip 73a, the large diameter portion 73b, and the cable connection end 73c may be integrally molded by a metal material having conductivity.

The pin housing 72 includes a front end portion 72a on the inverter 5 side, an intermediate portion 72b, and a base end portion 72c on the motor 4 side. The inverter-side connecting portion 81 is inserted into the distal end portion 72a. From the base end portion 72c, a cable 76 connected to the pin 73 is led out. The front end portion 72a is hollow. The middle portion 72b is solid. The intermediate portion 72b holds the pin 73. The intermediate portion 72b separates the distal end portion 72a from the base end portion 72c. A cable connection end 73c is disposed at the base end portion 72c. The space in which the cable connection end 73c is disposed is filled with a resin material or the like. In other words, the base end portion 72c is also solid. In fig. 3, the components filling the base end portion 72c are not shown.

The pin tip 73a is inserted into a socket 83 of the inverter-side connecting portion 81 described later. The pin front end 73a is electrically connected with respect to the socket 83. The outer diameter of the large-diameter portion 73b is larger than the outer diameter of the pin tip 73a. An annular packing 77 (the 1 st sealing member) is fitted to the large diameter portion 73b. The packing 77 is pressed by the inner wall surface of the hole provided in the intermediate portion 72b. As a result, the packing 77 is pressed and deformed. With this structure, the movement of the gas and the liquid between the distal end portion 72a and the proximal end portion 72c is inhibited. In other words, the leading end portion 72a and the base end portion 72c do not communicate with each other. This structure is the 1 st watertight structure that the electric supercharger 1 has.

The pin 73 is attached to the pin housing 72 via a gasket 77. The packing 77 is formed of a resin material having elasticity. Therefore, the relative positional relationship of the pin 73 and the pin housing 72 can be changed in accordance with the elasticity of the packing 77. In other words, the pin 73 is mounted to the pin housing 72 so as to have a certain degree of flexibility. According to this configuration, even if a force that generates a relative change acts between the pin 73 and the pin housing 72 due to vibration or the like acting on the electric supercharger 1, a slight relative change is allowed by the elasticity of the packing 77. Therefore, it is possible to suppress undesirable stress from being applied to the pin 73 and the pin housing 72 due to vibration applied to the electric supercharger 1 or vibration generated by the electric supercharger 1.

An inverter-side connecting portion 81 is inserted into the front end side of the pin housing 72. The inverter-side connecting portion 81 has a socket housing 82 (inverter-side connector housing) and 3 sockets 83 (inverter connectors). The socket 83 receives the pin 73 of the motor-side connecting portion 71. The receptacle housing 82 has a main body 84 and a flange 85. The body 84 houses 3 sockets 83. The flange 85 has a pair of through holes 85a. The receptacle housing 82 is fixed to the inverter housing 51 by bolts 85b (fastening members) inserted through the through holes 85a. A hole 51H (see fig. 2) is provided in the connection surface 51S of the inverter case 51. The shape of the hole 51H corresponds to the shape of the flange 85. More specifically, the shape of the hole 51H is a shape obtained by increasing the amount of movement of the socket 86 in addition to the shape of the flange 85. The back surface 85c of the flange 85 contacts the bottom surface 51Ha of the hole 51H.

The relative position of the receptacle housing 82 with respect to the inverter housing 51 is variable. In other words, the receptacle housing 82 is allowed to move slightly on the bottom surface 51Ha. When the inverter case 51 is attached to the motor case 43, the position of the socket 83 of the inverter-side connecting portion 81 and the position of the pin tip 73a of the motor-side connecting portion 71 may not exactly coincide. At this time, the pin tip 73a may unevenly contact the inner circumferential surface of the socket 83. Further, when the offset is large, the pin tip 73a may not be inserted into the socket 83. Therefore, in order to allow the offset, the socket housing 82 holding the socket 83 has a structure movable relative to the inverter housing 51.

Fig. 4 shows an example of a specific configuration. The insertion hole 86 is inserted into the through hole 85a of the flange 85. The socket 86 has a cylindrical body 86a and a disk-shaped flange 86b. A flange 86b is provided at the upper end of the body 86a. The outer diameter of the main body 86a is smaller than the inner diameter of the through hole 85a. In other words, a gap D1 is formed between the outer peripheral surface of the main body 86a and the inner peripheral surface of the through hole 85a. The bore 86a1 of the body 86a may have an inner diameter that is the same as the outer diameter of the shaft portion 85b2 of the bolt 85b. Further, the inner diameter of the hole 86a1 of the main body 86a may be slightly larger than the outer diameter of the shaft portion 85b2 of the bolt 85b. The lower end 86a2 of the main body 86a abuts the bottom surface 51Ha of the inverter case 51. The bolt 85b is inserted into the hole 86a1 of the body 86a. The bolt 85b is screwed into a screw hole provided in the bottom surface 51Ha. As a result, the socket 86 is fixed with respect to the inverter case 51. On the other hand, the upper end of the body 86a is separated from the main surface 85d of the flange 85. Thus, a gap D2 is also formed between the rear surface 86b1 of the outlet 86 provided at the upper end and the main surface 85D of the flange 85 of the receptacle housing 82. The receptacle housing 82 is allowed to move along the bottom surface 51Ha due to the gaps D1, D2. The distance the receptacle housing 82 is allowed to move corresponds to the length of the gap D1.

As described above, the electric supercharger 1 has the 1 st watertight structure by the gasket 77. The electric supercharger 1 has a2 nd watertight structure and a 3 rd watertight structure shown in fig. 5. Fig. 5 shows a state in which the inverter case 51 is slightly separated from the motor case 43 for easy understanding.

The 2 nd watertight configuration ensures watertightness between the motor housing 43 and the pin housing 72. A hole 43H is provided in the connection surface 43S of the motor case 43. The hole 43H corresponds to the shape of the flange 75. A groove 43D is formed in the bottom surface 43Ha of the hole 43H. The groove 43D surrounds the hole 43L. The gasket 44 (2 nd sealing member) is disposed in the groove 43D. The main surface 75c of the flange 75 faces the bottom surface 43Ha of the hole 43H. When the flange 75 is fitted into the hole 43H, the main surface 75c of the flange 75 presses and deforms the gasket 44. The 2 nd watertight structure hinders the movement of gas and liquid through the gap between the side surface 74a of the main body 74 of the pin housing 72 and the inner wall surface 43La of the hole 43L provided in the motor case 43. The 2 nd watertight structure inhibits the gas and liquid from moving between the bottom surface 43Ha of the hole 43H and the main surface 75c of the flange 75.

The 3 rd watertight configuration ensures watertightness between the motor case 43 and the inverter case 51. The inverter case 51 has a step portion 51a. The step portion 51a is provided on the connection surface 51S. The step portion 43a of the motor case 43 is fitted into the step portion 51a. In other words, the stepped portions 43a and 51a constitute a so-called inlay structure. According to the damascene structure, the position of the inverter-side connection portion 81 with respect to the motor-side connection portion 71 can be easily determined. The hole 51L is provided in the bottom surface 51a1 of the step portion 51a. The pin housing 72 and the socket housing 82 are inserted into the hole 51L. The bottom surface 51a1 is provided with a groove 51b. The groove 51b surrounds the hole 51L. An annular packing 55 (3 rd seal member) is disposed in the groove 51b. When the step portions 43a and 51a are combined, the bottom surface 43a1 of the step portion 43a presses and deforms the pad 55. The packing 55 pressed and deformed ensures water tightness between the motor case 43 and the inverter case 51.

In the electric supercharger 1, the inverter 5 is electrically connected to the motor 4 via the motor-side connection portion 71 and the inverter-side connection portion 81. The electric supercharger 1 includes a gasket 77 sandwiched between the pin housing 72 and the pin 73. According to the packing 77, the watertight state of the motor side connecting portion 71 can be maintained. As a result, the movement of water through the motor-side connection portion 71 is hindered. Therefore, the intrusion of water into the inverter 5 can be suppressed.

The electric supercharger 1 has 2 sets of watertight structures in addition to the above-described watertight structure. According to the 1 st watertight structure and the 2 nd watertight structure, the movement of the gas and the liquid from the motor 4 to the inverter 5 can be reliably suppressed. Further, according to the 3 rd watertight structure, the movement of the gas and the liquid from the outside of the electric supercharger 1 to the inside of the inverter 5 can be reliably suppressed. As a result, the gas and the liquid can be reliably prevented from entering the inverter 5.

The inverter-integrated gas supply apparatus according to the present disclosure can be implemented in various forms with various modifications and improvements based on the above-described embodiments and based on the knowledge of those skilled in the art. For example, the inverter-integrated gas supply device of the present disclosure may be applied to an electric supercharger that does not include a turbine.

In the above embodiment, the motor-side connection portion 71 has the pin 73, and the inverter-side connection portion 81 has the socket 83. For example, the motor-side connection portion 71 may have a socket, and the inverter-side connection portion 81 may have a pin.

Description of the reference numerals

An electric supercharger (inverter-integrated gas supply device); a turbine (fluid machine); a compressor (fluid machine); a motor; an inverter; a heat exchanger; a cooling water connection structure; an electrical connection configuration; a turbine wheel; a turbine housing; 22a, 32a.. the suction portion; 22b, 32b.. the discharge portion; 22c, 32c. A compressor wheel; a compressor housing; a rotor; a stator; a motor housing (motor housing); a step portion; 43a1.. bottom surface; a groove; 43H, 43l.. hole; 43Ha.. bottom surface; 43La... inner wall face; connecting surfaces; a gasket (No. 2 sealing member); 45. a cooling portion; 46a, 46b, 46c.. flow path; an inverter case (inverter case); a step portion; 51a1.. bottom surface; a slot; 51H, 51l.. hole; 51Ha.. bottom surface; a connection face; an inverter circuit; 53.. a cooling section; a flow path; a gasket (No. 3 sealing member); 61. an interface portion; 63... pad; 71.. a motor-side connection; a pin housing (motor side connector housing); a front end portion; an intermediate portion; a basal end; 73... pin (motor connector); a pin nose; a large diameter portion; a cable connection end; a body; a side; a flange; bolt holes; a bolt; a major face; 76... cable; 77... gasket (1 st sealing member); an inverter-side connecting portion; 82... socket case (inverter-side connector case); a socket (inverter connector); a body; 85.. a flange; a through hole; 85b2.. shaft portion; a bolt; major face; 85c.. back; 86... socket; a main body; 86a1... hole; a lower end; a flange; a back side; a fuel cell system; a bearing; cooling water; d1, D2... gap; g1, G2, G3... air; s.