KR20210117686A - Air compressor for car - Google Patents

Abstract

The present invention relates to an air compressor for a vehicle. More particularly, the present invention relates to an air compressor for a vehicle that can further increase cooling efficiency by forming a second cooling passage through which some air passing through a first cooling passage for cooling a driving unit is heat-exchanged with coolant and then cooled.

Description

Air compressor for car

The present invention relates to an air compressor for a vehicle, and more particularly, a second cooling passage through which some air passing through a first cooling passage for cooling a driving unit is heat-exchanged with cooling water and then cooling is formed, which can further increase cooling efficiency. It relates to an air compressor for a vehicle.

In general, a fuel cell vehicle refers to a vehicle in which hydrogen and oxygen are supplied to a humidifier, and electric energy generated through an electrochemical reaction, which is a reverse reaction of electrolysis of water, is supplied as a driving force of the vehicle. This is disclosed.

In general, passenger fuel cell vehicles are equipped with a 100kW fuel cell stack. When the fuel cell stack is operated under pressure, the air supplied to the fuel cell stack is supplied at a high pressure of 1 to 4 bar. An air compressor with a rotation speed of 200,000 RPM should be used.

A fuel cell vehicle typically includes a fuel cell stack that produces electricity, a humidifier that increases the humidity of air supplied to the fuel cell stack, a fuel supply unit that supplies hydrogen to the fuel cell stack, and air containing oxygen in the fuel cell stack. It is composed of an air supply unit for supplying the fuel cell, a cooling module for cooling the fuel cell stack, and the like.

The air supply unit includes an air cleaner that filters foreign substances contained in the air, an air compressor that compresses and supplies the air filtered from the air cleaner, a cooling device that cools the pressurized high temperature air, a humidifier that increases the humidity of the air, and controls the flow rate. It consists of a regulating valve.

The above-described air compressor compresses air sucked in from the outside using a compressor impeller and then sends it to the fuel cell stack.

Here, the compressor impeller is connected to the rotating shaft receiving power from the driving unit, and in general, the driving unit drives the rotating shaft by electromagnetic induction of the stator and the rotor.

At this time, the air compressor generates heat loss due to air resistance in the air bearing due to the high-speed rotation of the rotor, and cooling of the motor and the bearing, which are main heat sources, is required. Accordingly, a structure in which a motor and a bearing for rotating the impeller are cooled by using a part of the compressed air produced by the impeller of the air compressor, and then introduced into the inlet side of the impeller through the inner hole of the rotation shaft of the motor is proposed. .

In this regard, Korean Patent Registration No. 1810430 discloses an air compressor and a fuel cell vehicle in which an internal air flow is circulated using an end of a motor shaft, the air compressor comprising: a drive housing having a rotor and a stator therein; a motor shaft in which an air exhaust hole is drilled through the drive housing; an air bearing coupled to the housing rear end of the drive housing to support the shaft rear end of the motor shaft; Cooling air collected from the impeller chamber through the inner space of the drive housing to the motor outer chamber is drawn out from the compressed air formed by the impeller, and the cooling air is sucked into the air outlet hole at the rear end of the shaft. It is characterized in that it includes a motor cooling path for discharging to the front end.

However, in the conventional air compressor, the flow rate decreases as the compressed air passes through a narrow space around the air foil bearing, and as the air flow is delayed, there is a problem in that the self-cooling efficiency through the compressed air decreases. .

Republic of Korea Patent No. 10-1810430 (Registered on Dec. 13, 2017)

The present invention has been devised to solve the above-described problem, and an object of the present invention is to form a second cooling passage through which some air passing through the first cooling passage for cooling the driving unit is heat-exchanged with the cooling water and then cooling is formed. An object of the present invention is to provide an air compressor for a vehicle that can further increase efficiency.

In addition, it is an object of the present invention to sufficiently rotate by the first thrust bearing, the second thrust bearing, the first journal bearing and the second journal bearing, while providing sufficient cooling performance by the internal first to third cooling passages. It is to provide an air compressor for a vehicle that can be secured.

In addition, it is an object of the present invention to form a second cooling flow path that exchanges heat with cooling water through a simple configuration of forming a first heat exchange moving groove and a first flow hole in the front cartridge, so that it is easy to manufacture without the need to transport compressed air to the outside. An object of the present invention is to provide an air compressor for a vehicle capable of increasing cooling performance by

In addition, an object of the present invention is to transport the air that has passed through the first and second cooling passages to the chamber by the rear cartridge and the rear cover, and a hollow shaft hole is formed in the rotor to cool the rotor. An object of the present invention is to provide an air compressor for a vehicle that can be easily formed.

The vehicle air compressor 1000 according to the present invention includes a compression unit 100 for generating compressed air by compressing the inlet air by the operation of the impeller 120 ; A motor housing 210 in which a first coolant flow portion 212 through which coolant flows is formed, a stator 201 coupled to an inner circumferential surface of the motor housing 210, and a rotor 202 rotating inside the stator 201 and a driving unit 200 for driving the impeller 120 including a rotor disk 202a integrally formed with the rotor 202; a first cooling passage P1 through which a portion of compressed air is introduced to cool the driving unit 200 through between the impeller 120 and the rotor 202; and a second cooling passage (P2) in which a portion of the air in the first cooling passage (P1) is branched to exchange heat with the coolant in the first coolant flow section (212) and is supplied into the motor housing (210) for cooling. It is characterized in that it includes.

In addition, the vehicle air compressor 1000 may include a first thrust bearing 311 and a second thrust bearing 312 respectively provided at the front and rear of the rotor disk 202a; a first journal bearing 321 and a second journal bearing 322 rotatably supporting both ends of the rotor 202 at the front and rear; It is coupled to the front of the motor housing 210 and comprises a front cartridge 220 supporting the first thrust bearing 311, the second thrust bearing 312, and the first journal bearing 321. do.

In addition, the front cartridge 220, the first plate portion 221, the center of the first plate portion 221 is hollow, the first mounting portion 222 to which the rotor 202 is mounted; The periphery of the first mounting part 222 in front of the first plate part 221 is concave so that the first thrust bearing 311, the rotor disk 202a, and the second thrust bearing 312 are seated. 223).

In addition, in the first cooling passage P1, air flows along the rotor 202 to the first thrust bearing 311, the second thrust bearing 312, the first journal bearing 321 and the second journal bearing ( 322) is cooled while sequentially moving from front to rear, and in the second cooling passage P2, some of the air passing through the first thrust bearing 311 is removed from the front of the front cartridge 220. It is characterized in that it is cooled by heat exchange with the cooling water.

In addition, the front cartridge 220 communicates with the first seating part 223 and exchanges heat with the coolant in the front area of the first plate part 221 as some air branched from the first cooling passage P1 moves. A first heat exchange moving groove 224 concave as possible; A predetermined region of the first plate portion 221 is penetrated to form a first flow hole 226 communicating with the first heat exchange moving groove 224 and the inside of the motor housing 210 .

In addition, the front cartridge 220 is characterized in that the first heat exchange moving groove 224 is formed in a plurality along the circumferential direction.

In addition, the front cartridge 220 is characterized in that it includes a connecting portion 225 for connecting the plurality of first heat exchange moving grooves 224 in the circumferential direction.

In addition, the motor housing 210 is characterized in that the first coolant flow portion 212 is formed in front in contact with the front cartridge (220).

In addition, the front cartridge 220 communicates with the first coolant flow part 212 at the rear of the first plate part 221 and a second coolant flow part 227, which is a space in which the coolant flows, is formed concavely. characterized in that

In addition, the front cartridge 220 is characterized in that the second coolant flow portion 227 is integrally connected in the circumferential direction.

In addition, the compression unit 100, the front inlet 111 through which air is introduced and the front outlet 112 through which the compressed air is discharged, the front housing 110 is formed; It characterized in that it comprises a diffuser 130 for supporting the impeller 120 between the front housing 110 and the front cartridge (220).

In addition, the diffuser 130, the second plate portion 131; a second mounting part 132 in which the center of the second plate part 131 is hollow and the rotor 202 is mounted; A second heat exchange moving groove 134 concave in a shape corresponding to the first heat exchange moving groove 224 is included in the rear of the second plate part 131 .

In addition, the driving unit 200 is characterized in that it includes a rear cartridge 230 for supporting the second journal bearing 322 at the rear.

In addition, the driving unit 200 is mounted on the rear of the rear cartridge 230 and characterized in that it includes a rear cover 240 forming a chamber 241 space in which air is moved.

In addition, the vehicle air compressor 1000 passes through the first cooling passage P1 and the second cooling passage P2 through the hollow shaft hole 202b hollow in the axial direction of the rotor 202 to pass through the chamber 241. ) to form a third cooling passage (P3) for transferring the air introduced into the front housing (110) side.

In addition, the driving unit 200 is characterized in that the hollow second flow hole 213 and the third flow hole 233 are hollow to correspond to each other in the motor housing 210 and the rear cartridge 230 .

The air compressor for a vehicle according to the present invention has an advantage in that a second cooling passage is formed in which some air passing through the first cooling passage for cooling the driving unit is heat-exchanged with the cooling water, and then the cooling efficiency can be further increased.

In addition, in the vehicle air compressor according to the present invention, sufficient rotation is possible by the first thrust bearing, the second thrust bearing, the first journal bearing, and the second journal bearing, and sufficient rotation is possible by the internal first to third cooling passages. There is an advantage of securing cooling performance.

In addition, the vehicle air compressor according to the present invention forms a second cooling passage for heat exchange with coolant through a simple configuration of forming a first heat exchange movement groove and a first flow hole in the front cartridge, without the need to transfer compressed air to the outside. There is an advantage in that cooling properties can be improved by simple manufacturing.

In addition, an object of the present invention is to transport the air that has passed through the first and second cooling passages to the chamber by the rear cartridge and the rear cover, and a hollow shaft hole is formed in the rotor to cool the rotor. It has the advantage of being easily formed.

1 to 4 are a perspective view, an exploded perspective view, a cross-sectional view, and a view showing a cooling air flow of an air compressor for a vehicle according to the present invention.
Figure 5 is a front side plan view of the front cartridge of the air compressor for a vehicle according to the present invention.
6 is a rear plan view of the diffuser of the air compressor for a vehicle according to the present invention.
7 and 8 are respectively another front side plan view of the front cartridge of the air compressor for a vehicle according to the present invention.
9 and 10 are each a rear plan view of the front cartridge of the air compressor for a vehicle according to the present invention.

Hereinafter, the vehicle air compressor 1000 of the present invention having the above-described characteristics will be described in detail with reference to the accompanying drawings.

1 to 4 are a perspective view, an exploded perspective view, a cross-sectional view, and a view showing a cooling air flow of the air compressor 1000 for a vehicle according to the present invention, and FIG. 5 is a front cartridge ( 220) is a front plan view, FIG. 6 is a rear plan view of the diffuser 130 of the vehicle air compressor 1000 according to the present invention, and FIGS. 7 and 8 are the front cartridges of the vehicle air compressor 1000 according to the present invention, respectively. 220) is another front plan view, and FIGS. 9 and 10 are respectively a rear plan view of the front cartridge 220 of the air compressor 1000 for a vehicle according to the present invention.

The vehicle air compressor 1000 of the present invention includes a compression unit 100 , a driving unit 200 , a first cooling passage P1 , and a second cooling passage P2 .

The compression unit 100 is a part that compresses the inlet air by the operation of the impeller 120 to generate compressed air.

The compression unit 100 includes a front housing 110 and an impeller 120 .

The front housing 110 includes a front inlet 111 through which the compressed air is introduced and a front outlet 112 through which the compressed air is discharged, in a direction in which the air introduced through the front inlet 111 moves. It has a blow shape that is compressed into a shape in which the cross-sectional area is gradually reduced.

The impeller 120 is disposed inside the front housing 110 to compress the air introduced through the front inlet 111 .

In addition, in the vehicle air compressor 1000 of the present invention, a diffuser 130 may be further included in the compression unit 100 .

The diffuser 130 is coupled to the front housing 110 from the front side of the motor housing 210 and the impeller 120 is provided in an inner region formed with the front housing 110 . In addition, the diffuser 130 serves to support the first thrust bearing 311 of the driving unit 200 from the rear side. That is, the diffuser 130 is provided with the impeller 120 to form a space in which air is compressed, and supports the first thrust bearing 311 . In this case, the diffuser 130 includes a second plate portion 131 and a second mounting portion 132 . The second plate part 131 is provided at the rear of the front housing 110 , and the second mounting part 132 has a hollow center of the second plate part 131 to mount the rotor 202 .

The driving unit 200 includes a motor housing 210 , a stator 201 , a rotor 202 , and a rotor disk 202a.

The motor housing 210 is a basic body forming the driving unit 200, and is connected to the rear side of the compression unit 100, and the stator 201, the rotor 202, and the rotor disk 202a are therein. is built-in In addition, the motor housing 210 is formed with a first coolant flow portion 212 that is a space in which coolant flows. The vehicle air compressor 1000 is cooled by water cooling by the first coolant flow unit 212 .

The stator 201 is coupled and fixed to the inner circumferential surface of the motor housing 210 and includes a plate and a coil.

The front side of the rotor 202 rotates while being coupled with the impeller 120 of the compression unit 100 to rotate the impeller 120 . In this case, the rotor disk 202a is integrally formed with the rotor 202 .

When external power is supplied, the rotor 202 generates a rotational force by electromagnetic interaction with the stator 201, and the impeller 120 is rotated by this force, and air is compressed.

The rotor 202 may be provided with a bearing to facilitate rotation. More specifically, a first thrust bearing 311 is provided at the front of the rotor disk 202a and at the rear of the rotor disk 202a. It may include a second thrust bearing 312 to be used, a first journal bearing 321 and a second journal bearing 322 for rotatably supporting both ends at the front and rear of the rotor 202 .

In addition, when the first thrust bearing 311 , the second thrust bearing 312 , and the first journal bearing 321 are provided, the first thrust bearing 311 is coupled to the front of the motor housing 210 . ), a second thrust bearing 312 , and a front cartridge 220 supporting the first journal bearing 321 are provided, and are coupled to the rear of the motor housing 210 to support the second journal bearing 322 . It is preferable that the rear cartridge 230 to support is provided.

In more detail, the front cartridge 220 includes a first plate portion 221 , a first mounting portion 222 , and a first seating portion 223 . The first plate part 221 is provided between the diffuser 130 of the compression part 100 and the motor housing 210 .

The first mounting part 222 is a region in which the center of the first plate part 221 is hollow so that the rotor 202 is inserted.

The first seating part 223 means a region concave toward the rear so that the first thrust bearing 311 , the rotor 202 and the second thrust bearing 312 are seated in front of the first plate part 221 . .

The rear cartridge 230 includes a third plate portion 231 and a fourth mounting portion 232 . The third plate part 231 is mounted at the rear of the motor housing 210 , and the fourth mounting part 232 is a region in which the center of the third plate part 231 is hollow so that the rotor 202 is inserted.

At this time, when operating at high output, the area where the rotor disk 202a is provided and the area between the rotor 202 and the stator 201 (the first journal bearing 321 and the second journal bearing 322 are provided) area) can be heated.

The vehicle air compressor 1000 of the present invention is configured to easily cool the heat generated inside the driving unit 200 as described above, and includes a first cooling passage P1 and a second cooling passage P2.

The first cooling passage P1 has a configuration in which a portion of compressed air is introduced through between the impeller 120 and the rotor 202 to cool the driving unit 200, and a first thrust bearing 311, a second Cooling is performed while sequentially moving the region in which the thrust bearing 312 , the first journal bearing 321 , and the second journal bearing 322 are provided. In FIG. 4, the first thrust bearing 311 and the second thrust bearing 312 are deleted to indicate the flow passing through the first cooling passage P1 and are indicated by arrows, but the configuration is shown in FIG. 3 It is considered to be the same as the form shown in In more detail, some of the compressed air compressed through the impeller 120 passes through the area between the second mounting part 132 and the rotor 202 of the diffuser 130, so that the first thrust bearing 311 is The rotor disk 202a is moved upward along the front area, and it moves downward along the rear area of the rotor disk 202a provided with the second thrust bearing 312, in the axial direction of the rotor 202. Cooling is performed while moving from the front to the rear (moving along the area between the second journal bearing 322 and the rotor 202 in the area between the first journal bearing 321 and the rotor 202).

In the second cooling passage P2, a part of the air in the first cooling passage P1 is branched to exchange heat with the coolant in the first coolant flow part 212, and is supplied into the motor housing 210 for cooling. carry out

The second cooling passage (P2) may be performed by the front cartridge 220, more specifically, the front cartridge 220 is a first heat exchange moving groove to form the second cooling passage (P2) 224 and a first flow hole 226 are formed.

The first heat exchange moving groove 224 forms a space in which a predetermined area of the front area of the first plate part 221 is concave and moved while heat exchange with the coolant inside the first coolant flow part 212 is formed. part At this time, the first heat exchange moving groove 224 communicates with the first seating part 223 on which the first thrust bearing 311, the rotor disk 202a, and the second thrust bearing 312 are seated to communicate with the second thrust bearing 311. It communicates with the first seating part 223 so that some of the air (air in front of the rotor disk 202a) that has passed through the first thrust bearing 311 moves. The shape of the first heat exchange moving groove 224 can be formed in more various ways, including the shapes shown in FIGS. .

A predetermined region of the first plate portion 221 passes through the first flow hole 226 to communicate the first heat exchange movement groove 224 and the inside of the motor housing 210 . The first flow hole 226 is preferably formed through the rotor 202 in parallel with the formation direction.

At this time, a plurality of the first heat exchange moving grooves 224 are formed along the circumferential direction, and the first flow holes 226 are also formed in each of the first heat exchange moving grooves 224 . In addition, the vehicle air compressor 1000 of the present invention may include a connection part 225 for connecting the plurality of first heat exchange moving grooves 224 to the front cartridge 220 in the circumferential direction. Like the first heat exchange moving groove 224, the connecting part 225 has a concave front of the front cartridge 220 and the first plate part 221, and the first heat exchange moving groove 224 in the radial direction. By connecting the farthest parts of the formed part to each other, sufficient cooling can be achieved while the air is moved. (See Fig. 8)

In other words, in the second cooling passage P2, a portion of the air passing through the first thrust bearing 311 flows into and moves into the first heat exchange movement groove 224 of the front cartridge 220, and the first After being cooled by heat exchange with the coolant in the coolant flow part 212 , it is supplied into the motor housing 210 through the first flow hole 226 to perform cooling.

Meanwhile, a second heat exchange moving groove 134 concave in a shape corresponding to the first heat exchange moving groove 224 may be further formed at the rear of the diffuser 130 . (The bar diffuser 130 shown in FIG. 6 refers to the direction viewed from the rear, and is located in contact with the front of the front cartridge 220).

The second heat exchange moving groove 134 is a part that forms a space in which air can move in a shape corresponding to the first heat exchange moving groove 224 at the rear of the diffuser 130 in contact with the front of the front cartridge, The amount of air passing through the second cooling passage P2 may be sufficiently secured.

In addition, the first coolant flow portion 212 of the motor housing 210 is located in front of the front cartridge 220 and abuts so that heat exchange between the air passing through the second cooling passage P2 and the coolant can be easily performed. Preferably, a second coolant flow portion 227 may be further formed behind the first plate portion 221 of the front cartridge 220 in order to further increase heat exchange efficiency.

The second coolant flow part 227 is a concave space in communication with the first coolant flow part 212 at the rear of the first plate part 221 so that the coolant flows, and through this, the vehicle air compressor ( 1000) is based on the front cartridge 220, air is moved to the front and cooling water to the rear, so that heat exchange is made more effectively with each other.

As shown in FIG. 9 , the second coolant flow units 227 may be spaced apart along the circumferential direction, or may be integrally connected in the circumferential direction as shown in FIG. 10 .

In fact, as a result of the experiment of the vehicle air compressor 1000 having the form shown in FIG. 3 , the compressed air passing through the impeller 120 is 120 to 130° C., and the air passing through the first thrust bearing 311 . The temperature is 140 ~ 150 ℃, and heat is generated in the region provided with the first thrust bearing 311 . It was confirmed that the temperature of the air passing through the first heat exchange moving groove 224 and the first flow hole 226 of the second cooling passage P2 was 100° C. or less and cooled. That is, the vehicle air compressor 1000 of the present invention has the advantage of cooling the inside of the driving unit 200 in a cooled state by heat exchange between cooling water and air.

The vehicle air compressor 1000 according to the present invention is mounted on the rear of the rear cartridge 230 and is provided with a rear cover 240 forming a moving chamber 241 space, and the rotor 202 is hollow in the axial direction. A shaft hole 202b may be formed.

The rear cover 240 is configured to form a chamber 241 that is a space in which air that has passed through the first cooling passage P1 and the second cooling passage P2 moves, and is introduced into the chamber 241. The air moves toward the front housing 110 along the hollow shaft hole 202b of the rotor 202 to form a third cooling passage P3 for cooling the rotor 202 .

At this time, the motor housing 210 and the rear cartridge 230 are hollow at positions corresponding to each other so as to communicate the inside of the motor housing 210 and the chamber 241. A second flow hole 213 and a third flow hole ( 233) is formed.

Accordingly, the ball inside the motor housing 210 together with the flow supplied to the chamber 241 through the area provided with the second journal bearing 322 along the periphery of the rotor 202 is the second flow hole ( 213) and the third flow hole 233 is supplied to the chamber 241.

As described above, the vehicle air compressor 1000 according to the present invention has a high output by the first thrust bearing 311 , the second thrust bearing 312 , the first journal bearing 321 , and the second journal bearing 322 . There is an advantage in that sufficient cooling performance can be ensured by the internal first cooling passage P1 to the third cooling passage P3 while sufficient rotation of the engine is possible.

The present invention is not limited to the above-described embodiments, and the scope of application is varied, and anyone with ordinary knowledge in the field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims It goes without saying that various modifications are possible.

1000: car air compressor
100: compression unit
110: front housing
111: front inlet 112: front outlet
120: compression impeller
130: diffuser
131: second plate portion 132: second mounting portion
133: second seating part 134: second heat exchange moving groove
200: drive unit
201 : stator
202: rotor
202a: rotor disk 202b: hollow shaft hole
210: motor housing
211: third mounting part
212: first coolant flow part
213: second flow hole
220: front cartridge
221: first plate portion 222: first mounting portion
223: first seating part
224: first heat exchange moving groove 225: connection part
226: first flow hole
227: second coolant flow part
230: rear cartridge
231: third plate part 232: fourth mounting part
233: third flow hole
240: rear cover 241: chamber
311: first thrust bearing 312: second thrust bearing
321: first journal bearing 322: second journal bearing;
P1: 1st cooling flow path
P2: 2nd cooling flow path
P3: 3rd cooling flow path

Claims (16)

Compression unit 100 for generating compressed air by compressing the inlet air by the operation of the impeller 120;
A motor housing 210 in which a first coolant flow portion 212 through which coolant flows is formed, a stator 201 coupled to an inner circumferential surface of the motor housing 210, and a rotor 202 rotating inside the stator 201 and a driving unit 200 for driving the impeller 120 including a rotor disk 202a integrally formed with the rotor 202;
a first cooling passage P1 through which a portion of compressed air is introduced to cool the driving unit 200 through between the impeller 120 and the rotor 202; and
A portion of the air in the first cooling flow path P1 is branched to exchange heat with the cooling water inside the first cooling water flow part 212 and is supplied into the motor housing 210 to cool the second cooling flow path P2. A vehicle air compressor comprising a.
According to claim 1,
The vehicle air compressor 1000,
a first thrust bearing 311 and a second thrust bearing 312 respectively provided at the front and rear of the rotor disk 202a;
a first journal bearing 321 and a second journal bearing 322 rotatably supporting both ends of the rotor 202 at the front and rear;
It is coupled to the front of the motor housing 210 and comprises a front cartridge 220 supporting the first thrust bearing 311, the second thrust bearing 312, and the first journal bearing 321. car air compressor.
3. The method of claim 2,
The front cartridge 220,
A first plate portion 221 and;
a first mounting part 222 in which the center of the first plate part 221 is hollow and the rotor 202 is mounted;
The periphery of the first mounting part 222 in front of the first plate part 221 is concave so that the first thrust bearing 311, the rotor disk 202a, and the second thrust bearing 312 are seated. 223), characterized in that it comprises a vehicle air compressor.
4. The method of claim 3,
In the first cooling passage P1, air flows along the rotor 202, the first thrust bearing 311, the second thrust bearing 312, the first journal bearing 321, and the second journal bearing 322. Cooling the provided area while moving sequentially from front to rear,
The second cooling passage (P2) is a vehicle air compressor, characterized in that a portion of the air that has passed through the first thrust bearing (311) is heat-exchanged with the coolant at the front of the front cartridge (220) to cool it.
5. The method of claim 4,
The front cartridge 220,
A first heat exchange moving groove 224 concave so as to communicate with the first seating part 223 and exchange heat with the coolant in the front area of the first plate part 221 as some air branched from the first cooling passage P1 moves. ;
A vehicle air compressor, characterized in that a predetermined region of the first plate portion 221 is penetrated to form a first flow hole 226 communicating with the first heat exchange moving groove 224 and the inside of the motor housing 210 .
6. The method of claim 5,
The front cartridge 220 is a vehicle air compressor, characterized in that the first heat exchange moving groove 224 is formed in a plurality along the circumferential direction.
7. The method of claim 6,
The front cartridge 220 is an air compressor for a vehicle, characterized in that it includes a connecting portion 225 for connecting the plurality of first heat exchange moving grooves 224 in the circumferential direction.
6. The method of claim 5,
The motor housing (210) is a vehicle air compressor, characterized in that the first coolant flow portion (212) is formed in front of the contact with the front cartridge (220).
9. The method of claim 8,
The front cartridge 220 has a second coolant flow portion 227 that communicates with the first coolant flow portion 212 at the rear of the first plate portion 221 and is a space through which the coolant flows. car air compressor.
10. The method of claim 9,
The front cartridge 220 is a vehicle air compressor, characterized in that the second coolant flow portion 227 is integrally connected in the circumferential direction.
6. The method of claim 5,
The compression unit 100,
a front housing 110 having a front inlet 111 through which air is introduced and a front outlet 112 through which compressed air is discharged;
and a diffuser (130) supporting the impeller (120) between the front housing (110) and the front cartridge (220).
12. The method of claim 11,
The diffuser 130,
second plate portion 131;
a second mounting part 132 in which the center of the second plate part 131 is hollow and the rotor 202 is mounted;
and a second heat exchange moving groove (134) concave in a shape corresponding to the first heat exchange moving groove (224) at the rear of the second plate part (131).
6. The method of claim 5,
The driving unit (200) is a vehicle air compressor, characterized in that it includes a rear cartridge (230) for supporting the second journal bearing (322) at the rear.
14. The method of claim 13,
The driving unit 200 is mounted on the rear of the rear cartridge 230, the vehicle air compressor, characterized in that it comprises a rear cover 240 forming a chamber 241 space in which air is moved.
15. The method of claim 14,
The vehicle air compressor 1000 passes through the first cooling passage P1 and the second cooling passage P2 by the hollow shaft hole 202b hollow in the axial direction of the rotor 202 to the chamber 241. A vehicle air compressor, characterized in that forming a third cooling passage (P3) for transferring the introduced air toward the front housing (110).
16. The method of claim 15,
The driving unit 200 is a vehicle air compressor, characterized in that the hollow second flow hole 213 and the third flow hole 233 to correspond to each other to the motor housing 210 and the rear cartridge (230) are hollow.

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