CN215991795U - Water cooling structure and motor controller with same - Google Patents

Abstract

The application relates to the field of motor controllers, in particular to a water cooling structure which comprises a water channel assembly and a plurality of heat exchangers; the water channel assembly is provided with an inlet, an outlet, a first water channel and a second water channel, the first water channel and the second water channel are communicated with the inlet and the outlet, the heat exchangers are connected in series and communicated with the first water channel in a short-distance mode of being close to the inlet, and the second water channel is spirally communicated between the first water channel and the outlet in a mode of being far away from the inlet. The flow passage has the advantages of reasonable structure, low design and manufacturing cost, small local loss of the flow passage and energy conservation and environmental protection.

Description

Water cooling structure and motor controller with same

Technical Field

The application relates to the field of motor controllers, in particular to a water cooling structure and a motor controller with the same.

Background

The motor controller is an integrated circuit which controls the motor to work according to the set direction, speed, angle and response time through active work.

With the development of industries such as new energy automobiles, the performance requirements on the motor controller are higher and higher, and particularly, the motor controller needs to be smaller and smaller under the same power. The key for restricting the improvement of the power density of the motor controller is the heat dissipation capability of the internal electronic components, and once the heat dissipation is insufficient, the temperature rise of the electronic components is high, so that the electronic components are caused to have faults and the like, and the working performance of the motor controller is influenced. The existing motor controller generally adopts a water cooling structure.

The water cooling structure of the existing motor controller is a heat exchanger with a complex structure, the heat dissipation effect is good, but the heat productivity of each part of the motor controller is different, and the heat exchanger can dissipate heat of each part of the motor controller without difference, so that the water cooling structure wastes more energy, and the part to be improved exists.

SUMMERY OF THE UTILITY MODEL

In order to reduce the extravagant energy of water-cooling structure, this application provides a water-cooling structure and has water-cooling structure's machine controller.

The application provides a water-cooling structure adopts following technical scheme:

a water cooling structure comprises a water channel assembly and a plurality of heat exchangers; the water channel assembly is provided with an inlet, an outlet, a first water channel and a second water channel, the first water channel and the second water channel are communicated with the inlet and the outlet, the heat exchangers are connected in series and communicated with the first water channel in a short-distance mode of being close to the inlet, and the second water channel is spirally communicated between the first water channel and the outlet in a mode of being far away from the inlet.

Optionally, the flow area of the first water channel and the flow area of the second water channel are respectively smaller than the flow area of the heat exchanger.

Optionally, the heat exchanger includes a housing and a plurality of split-flow columns disposed in the housing, the housing includes two opposite bottom walls and two opposite side walls, and the split-flow columns are connected between the two bottom walls.

Optionally, the plurality of splitter columns are divided into a plurality of rows at intervals along the direction from the inlet to the outlet, and two adjacent rows of splitter columns are arranged in a staggered manner.

Optionally, two boss ribs are arranged on a straight line where the diversion column with each drainage diameter larger than the first water channel hydraulic diameter is located, and are integrally formed with the side walls respectively.

Optionally, the splitter columns are regular hexagonal prisms, and each splitter column has an edge angle facing the incoming flow direction of the water flow.

According to the above concept, the present application further provides a motor controller with a water cooling structure, which includes the water cooling structure of the motor controller, and further includes a sealed shell, wherein the first water channel, the second water channel and the heat exchanger are integrally formed inside the sealed shell; the inlet and the outlet are communicated with the outside of the sealing shell.

Optionally, the sealing shell includes a shell and a cover plate, the cover plate is buckled with the shell, and a sealing ring is arranged between the shell and the cover plate.

Optionally, the water-cooled heat exchanger further comprises an IGBT module and a dc filter capacitor, the IGBT module and the heat exchanger are arranged outside the sealed casing, the IGBT module is opposite to the heat exchanger, and the dc filter capacitor is opposite to the second water channel.

Optionally, a heat conducting material is arranged between the IGBT module and the sealing case, and between the dc filter capacitor and the sealing case.

In summary, because the heat exchanger is close to the inlet, the heat exchanger has better heat exchange performance relative to the second water channel, the flow area of the heat exchanger is increased relative to the first water channel, and the diversion column and the boss rib are additionally arranged to further enhance the heat exchange performance at the heat exchanger, so that an element (such as an IGBT module) with higher heat generation can be arranged corresponding to the heat exchanger, and an element (such as a direct current filter capacitor) with lower heat generation can be arranged corresponding to the second water channel, thereby not only reasonably utilizing space, but also having better heat dissipation effect.

And cooling water flows into the sealed shell from the inlet, sequentially flows through the plurality of heat exchangers, dissipates heat of the IGBT module just opposite to each heat exchanger, flows into the second water channel, dissipates heat of the direct current filter capacitor, and finally flows out of the sealed shell from the outlet. The cooling water firstly radiates the IGBT module and then radiates the direct current filter capacitor, and compared with the existing motor controller which adopts a friction stir welding process and other methods for radiating most of electronic elements, the process is simple and the cost is lower.

Drawings

FIG. 1 is a schematic diagram of a water cooling structure according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a motor controller with a water cooling structure according to an embodiment of the present application.

Reference numerals: 1. a heat exchanger; 11. a cavity inlet; 12. an outlet of the cavity; 13. a bottom wall; 14. a side wall; 15. a flow-dividing column; 16. a boss rib; 2. a first water channel; 3. a second water channel; 4. sealing the shell; 41. an inlet; 42. an outlet; 5. an IGBT module; 6. and a direct current filter capacitor.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of the present invention, do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses water-cooling structure.

Referring to fig. 1, comprising a water channel assembly and a plurality of heat exchangers 1; the water channel assembly is provided with an inlet 41, an outlet 42, a first water channel 2 and a second water channel 3, wherein the first water channel 2 and the second water channel 3 are communicated with the inlet 41 and the outlet 42, the plurality of heat exchangers 1 are communicated with the first water channel 2 in series in a mode that the heat exchangers are close to the inlet 41 in a short distance, and the second water channel 3 is communicated between the first water channel 2 and the outlet 42 in a spiral mode that the heat exchangers are far away from the inlet 41.

Specifically, the number of the heat exchangers 1 is determined according to the heat dissipation requirement of the motor controller, and when the heat generation amount of the motor controller is high, for example, when a plurality of IGBT modules are installed on a fan of the motor controller, the number of the heat exchangers 1 should be increased correspondingly. The quantity of heat exchanger 1 in this embodiment is three, and three heat exchanger 1 establishes ties through first water course 2, and first water course 2 is S-shaped and arranges. The second water channel 3 is also coiled in an S shape, so that the second water channel 3 has a larger heat exchange area, and the heat dissipation effect of the second water channel 3 is improved.

The way in which the plurality of heat exchangers 1 are close to the inlet 41 by a short distance means that: the length of the first water channel 41 between the first heat exchanger 1 and the inlet 41 in the water flow direction is shorter, the length of the first water channel 41 is not more than that of the heat exchanger 1, and the length of the first water channel 41 between the first heat exchanger 1 and the inlet 41 in the water flow direction is shorter, so that the cooling water is lower in temperature rise before entering the first heat exchanger 1, and further the cooling water still has a better heat dissipation effect after flowing into the heat exchanger 1.

The inlet 41 is communicated with the initial end of the first water channel 2, the outlet 42 is communicated with the tail end of the second water channel, and the first water channel 2 between the first water channel 2 and the inlet 41 is as short as possible, so that the temperature rise of cooling water before entering the heat exchanger 1 is reduced, and the heat dissipation effect of the heat radiator 1 is ensured

In the application, the radiating effect of heat exchanger 1 is superior to the radiating effect of second water course 3, but heat exchanger 1 structure is complicated, the cost is higher, the radiating effect of second water course 3 is not as good as heat exchanger 1, but simple structure, the cost is lower, therefore, in this application, heat exchanger 1 cooperates with second water course 3, heat exchanger 1 generates heat intensively to motor controller, the position that calorific capacity is big dispels the heat, second water course 3 dispels the heat to all the other positions of motor controller, reasonable planning has been carried out to water-cooling structure, when guaranteeing that the radiating effect is good, the energy waste of water-cooling structure has been reduced, and help reducing the cost of the motor controller with water-cooling structure.

Referring to fig. 1, the flow area of the first water passage 2 and the flow area of the second water passage 3 are respectively smaller than the flow area of the heat exchanger 1.

In the application, the flow area of first water course 2 and the flow area of second water course 3 are less than the flow area of heat exchanger 1 respectively, promptly for first water course 2 and second water course 3, have enlarged the flow area of heat exchanger 1, and because mainly carry out heat convection in the heat exchanger 1, and heat exchanger 1 dispels the heat to the intensive position that generates heat of motor controller, enlarge the flow area of heat exchanger 1 and effectively improved the heat transfer ability of heat exchanger 1.

Referring to fig. 1, the heat exchanger 1 includes a housing and a plurality of split-flow columns 15 disposed in the housing, the housing includes two opposite bottom walls 13 and two opposite side walls 14, and the split-flow columns 15 are connected between the two bottom walls 13.

In particular, with reference to fig. 1, the distance between the two bottom walls 13 is smaller than the distance between the two side walls 14, the heat exchanger 1 is in a flat cuboid shape, the length direction of the heat exchanger 1 is consistent with the water flow direction, two ends of the heat exchanger 1 in the water flow direction are respectively provided with a cavity outlet 12 and a cavity inlet 11, the shape and the size of the cavity inlet 11 and the cavity outlet 12 are the same, two opposite edges of the cavity inlet 11 and the cavity outlet 12 are flush with two bottom walls 13 of the heat exchanger 1, the distance between the two opposite edges is smaller than the distance between the two side walls 14 of the heat exchanger 1, the sizes of the cavity inlet 11 and the cavity outlet 12 are the same as the first water channel 2, namely the flow area of the first water channel 2 and the flow area of the second water channel 3 are respectively smaller than the flow area of the heat exchanger 1, but results in a sudden increase in hydraulic diameter within the heat exchanger 1, with large local losses. The columns 15 are arranged in the heat exchanger 1 in a staggered manner, so that the change of the hydraulic diameter in the heat exchanger 1 is reduced, but large local loss is also generated.

More specifically, with reference to fig. 1, in order to reduce the local loss caused by the staggered arrangement of the splitter columns 15, in this embodiment, the distances between two adjacent rows of splitter columns 15 are equal, and the distance between any two adjacent splitter columns 15 in each row of splitter columns 15 is equal.

The function of the splitter column 15 is: on one hand, the flow dividing column 15 divides the cooling water flow from the upstream, the flow direction of the cooling water is changed, the flow of the cooling water in the heat exchange cavity is lengthened, the bottom wall 13 and the side wall 14 of the heat exchanger 1 exchange heat more sufficiently, and the heat radiation effect of the heat exchanger 1 is further improved; on the other hand, the splitter columns 15 are arranged in rows in the direction from the chamber inlet 11 to the chamber outlet 12, and each row of splitter columns 15 has the function of reducing the hydraulic diameter at the straight line.

However, the number of the splitter columns 15 between two adjacent rows of splitter columns 15 is inconsistent due to the fact that the splitter columns 15 are staggered in rows, that is, a large local loss still exists between the two adjacent rows of splitter columns 15, so that the boss rib 16 is arranged on the side wall 14 of the heat exchanger 1, the change of the hydraulic diameter between the two adjacent rows of splitter columns 15 is reduced, and further the local loss is reduced. When the hydraulic diameter changes exist between the cavity inlet 11 and the first row of the diversion columns 15 and between the cavity outlet 12 and the last row of the diversion columns 15, the hydraulic diameter change can also be reduced by arranging the boss ribs 16 at corresponding positions on the side wall 14.

In summary, the convex rib 16 can reduce the variation of the hydraulic diameter between the first row of the distribution pillars 15 and the cavity inlet 11, and the variation of the hydraulic diameter between each of the other rows of the distribution pillars 15 and the previous row of the distribution pillars 15, which can be derived, the convex rib 16 can reduce the hydraulic variation between each row of the distribution pillars 15 and the cavity inlet 11, and due to the design and processing errors, the hydraulic diameter of each row of the distribution pillars 15 is not completely the same as the hydraulic diameter of the cavity inlet 11, but the two are as close as possible, thereby obtaining a good effect of reducing the local loss.

More specifically, with continued reference to fig. 1, the joints of the sidewall 14 with the cavity inlet 11 and the cavity outlet 12 are all in arc transition to slow down the change of hydraulic diameter from the cavity inlet 11 to the heat exchange cavity and from the heat exchange cavity to the cavity outlet 12, thereby reducing local loss. The volume of the boss rib 16 is determined according to the variation of the hydraulic diameter between the first row of the diversion column 15 and the cavity inlet 11 and the variation of the hydraulic diameter between the two adjacent rows of the boss ribs 16, when the variation is large, the volume of the boss rib 16 is correspondingly increased, when the variation is small, the volume of the boss rib 16 is correspondingly reduced, when no variation exists, the boss rib 16 does not need to be arranged, unnecessary local loss is avoided, and the shapes of the two boss ribs 16 corresponding to each row of the diversion column 15 are symmetrical.

In this embodiment, the splitter column 15 is divided into three types by taking the row as a unit, the first type is that the number of the splitter column 15 is eight, there are boss ribs 16 on both sides, the second type is that the number of the splitter column 15 is nine, there are boss ribs 16 smaller than the boss ribs 16 in the first type on both sides, the third type is that the number of the splitter column 15 is ten, and the boss ribs 16 are not provided on both sides. The first type of splitter column 15 is a first row and a last row, and the second and third types are alternately distributed between the first row and the last row.

In summary, the two sides of each flow dividing column 15 with the drainage diameter larger than the hydraulic diameter of the cavity inlet 11 are provided with the boss ribs 16, the intervals between two adjacent rows of flow dividing columns 15 are equal, the intervals between two adjacent flow dividing columns 15 in the same row are equal, and the two boss ribs 16 corresponding to the same row of flow dividing columns 15 are symmetrical in shape, so that the local loss in the heat exchanger 1 is reduced, the electric energy required by the water pump for driving the cooling water to circulate can be further reduced, and the environment protection and the energy saving are facilitated.

When the cross-sectional shape of the split flow columns 15 is irregular, the local loss caused by each split flow column 15 itself is large, contrary to the original intention of reducing the local loss in the heat exchanger 1, and is not easy to process, so that the cross-sectional shape of the split flow column 15 in the present application takes a regular shape.

Referring to fig. 1, preferably, the splitter 15 is in the shape of a regular hexagonal prism, and each splitter 15 has an edge facing the cavity inlet 11.

Specifically, the interval between two adjacent rows of the split flow columns 15 is equal to the interval between two adjacent split flow columns 15 in each row, because the split flow columns 15 are in the shape of a regular hexagon prism, the interval between any two adjacent split flow columns 15 in the heat exchanger 1 is equal, so that the split flow columns 15 in the heat exchanger 1 are uniformly distributed on the whole, and compared with the split flow columns 15 which are arranged irregularly, arranged in a matrix shape or arranged at unequal intervals in rows, the local loss caused by the split flow columns 15 per se is greatly reduced.

To sum up, the radiating effect of heat exchanger 1 is superior to the radiating effect of second water course 3, but heat exchanger 1 structure is complicated, and the cost is higher, and the radiating effect of second water course 3 is not as good as heat exchanger 1, but simple structure, and the cost is lower, therefore, in this application, heat exchanger 1 and the cooperation of second water course 3, heat exchanger 1 generates heat intensively to machine controller, and the position that calorific capacity is big dispels the heat, and second water course 3 dispels the heat to all the other positions of machine controller, has carried out reasonable planning to water-cooling structure, when guaranteeing that the radiating effect is good, has reduced water-cooling structure's energy waste, and helps reducing the cost of machine controller with water-cooling structure

The principle of applying the flow dividing column 15 and the boss rib 16 is as follows: on one hand, the flow dividing column 15 divides the cooling water flow from the upstream, changes the flow direction of the cooling water, prolongs the flow of the cooling water in the heat exchange cavity, and more sufficiently exchanges heat with the bottom wall 13 and the side wall 14 of the heat exchanger 1, thereby improving the heat dissipation effect of the heat exchanger 1; on the other hand, the splitter columns 15 are arranged in rows in the direction from the chamber inlet 11 to the chamber outlet 12, and each row of splitter columns 15 has the function of reducing the hydraulic diameter at the straight line. The rib 16 reduces the local loss caused by the cross arrangement of the splitter columns 15, and further reduces the local loss in the heat exchanger 1.

The application also discloses a motor controller with the water-cooling structure.

Referring to fig. 1 and 2, the water cooling structure further includes a sealed shell 4, and the first water channel 2, the second water channel 3 and the heat exchanger 1 are integrally formed inside the sealed shell 4; the inlet 41 and the outlet 42 communicate with the outside of the sealed case 4. The sealing shell 4 comprises a shell and a cover plate, the shell is buckled with the cover plate, and a sealing ring is arranged between the shell and the cover plate.

Specifically, referring to fig. 2, the sealing case 4 has a rectangular parallelepiped shape. The inlet 41 and the outlet 42 are located on one side in the length direction of the hermetic case 4, so that the inlet 41 and the outlet 42 are connected to the cooling water line. One side of 4 direction of height of seal shell is opened, and the seal groove has been seted up at the edge of opening the side, and the sealing washer inlays to be established in the seal groove, and the apron seals the side of opening of seal shell 4, and seal shell 4 is close to the inside one side of seal shell 4 and first water course 2, second water course 3 and 1 butt of heat exchanger to still can obtain good radiating effect when making the radiating part of needs install on the apron.

In the application, under the prerequisite of guaranteeing to bear cooling water pressure, first water course 2, second water course 3 and heat exchanger 1's wall thickness is thinner, and the radiating effect is better, but the wall thickness attenuation makes first water course 2, second water course 3 and heat exchanger 1 damaged because of external force easily, and then leads to the cooling water to reveal, influences machine controller's safety. First water course 2, second water course 3 and heat exchanger 1 are inside 4 sealed shells through cast mode integrated into one piece, and wherein, a diapire 13 and the sealed shell 4 of heat exchanger 1 and the relative inner wall integrated into one piece of apron both can avoid first water course 2, second water course 3 and heat exchanger 1 to damage because of external force, can promote the heat exchange efficiency of first water course 2, second water course 3 and heat exchanger 1 again.

Referring to fig. 1 and 2, the motor controller with the water-cooling structure further includes an IGBT module 5 and a dc filter capacitor 6, which are disposed outside the sealed housing 4, wherein the IGBT module 5 is opposite to the heat exchanger 1, and the dc filter capacitor 6 is opposite to the second water channel 3.

Specifically, the IGBT module 5 and the dc filter capacitor 6 are main heat generating components in the motor controller, and the heat generated by the IGBT module 5 during operation is higher than the heat generated by the dc filter capacitor 6, so the heat exchanger 1 with a better heat dissipation effect is opposite to the IGBT module 5, and dissipates heat from the IGBT module 5, and the second water channel 3 with a heat dissipation effect worse than that of the heat sink dissipates heat from the dc filter capacitor 6.

More specifically, in the present embodiment, the number of the IGBT modules 5 is three, the three IGBT modules 5 are arranged side by side, the number of the radiators is three, and the radiators are in one-to-one correspondence with the IGBT modules 5, each radiator faces the corresponding IGBT module 5, and the second water channel 3 faces the dc filter capacitor 6.

In order to further optimize the heat dissipation of the IGBT module 5 and the dc filter capacitor 6, a heat conducting material is arranged between the IGBT module 5 and the sealing shell 4 and between the dc filter capacitor 6 and the sealing shell 4, in this embodiment, the heat conducting material uses a high heat conducting silicone grease first, the high heat conducting silicone grease is convenient to use, and the cost is low.

In summary, the cooling water flows through the second water channel 3 after flowing through the heat exchange cavity, that is, the cooling water firstly dissipates heat of the IGBT module 5 and then flows into the second water channel 3 to the dc filter capacitor 6. The heat quantity that IGBT module 5 distributed is higher than the heat quantity that direct current filter capacitor 6 distributed, and the cooling water rises to IGBT module 5 heat dissipation back temperature, and heat transfer capacity descends, dispels the heat to direct current filter capacitor 6 again, helps motor controller's steady operation. Cooling water flows into the sealed shell 4 from the inlet 41, sequentially flows through the plurality of heat exchangers 1, dissipates heat of the IGBT module 5 right opposite to each heat exchanger 1, flows into the second water channel 3, dissipates heat of the direct current filter capacitor 6, and finally flows out of the sealed shell 4 from the outlet 42. The cooling water firstly radiates the IGBT module 5 and then radiates the direct current filter capacitor 6, and compared with the existing motor controller which adopts a friction stir welding process and other methods for radiating most electronic elements, the process is simple and the cost is low.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A water-cooling structure is characterized in that: comprises a water channel assembly and a plurality of heat exchangers (1);

the water channel assembly is provided with an inlet (41), an outlet (42), a first water channel (2) and a second water channel (3) which are communicated with the inlet (41) and the outlet (42), the heat exchangers (1) are communicated with the first water channel (2) in series in a mode that the heat exchangers are close to the inlet (41) in a short distance, and the second water channel (3) is communicated with the first water channel (2) and the outlet (42) in a spiral mode far away from the inlet (41).

2. The water-cooling structure according to claim 1, characterized in that: the flow area of the first water channel (2) and the flow area of the second water channel (3) are respectively smaller than the flow area of the heat exchanger (1).

3. The water-cooling structure according to claim 2, characterized in that: the heat exchanger (1) comprises a shell and a plurality of flow dividing columns (15) arranged in the shell, the shell comprises two opposite bottom walls (13) and two opposite side walls (14), and the flow dividing columns (15) are connected between the two bottom walls (13).

4. The water-cooling structure according to claim 3, characterized in that: the plurality of the flow dividing columns (15) are divided into a plurality of rows along the direction from the inlet (41) to the outlet (42), and two adjacent rows of the flow dividing columns (15) are arranged in a staggered mode.

5. The water-cooling structure according to claim 4, wherein: two boss ribs (16) are arranged on a straight line where the diversion column (15) with each drainage diameter larger than the hydraulic diameter of the first water channel (2) is located, and are respectively integrally formed with the two side walls (14).

6. The water-cooling structure according to claim 3, characterized in that: the flow dividing columns (15) are regular hexagonal prisms, and each flow dividing column (15) has an edge angle which is opposite to the incoming flow direction of water flow.

7. A motor controller with a water cooling structure, characterized by comprising the water cooling structure according to any one of claims 1 to 6, and further comprising a sealed shell (4), wherein the first water channel (2), the second water channel (3) and the heat exchanger (1) are integrally formed inside the sealed shell (4); the inlet (41) and the outlet (42) are communicated with the outside of the sealing shell (4).

8. The motor controller having a water-cooling structure according to claim 7, wherein: the sealing shell (4) comprises a shell and a cover plate, the shell is buckled with the cover plate, and a sealing ring is arranged between the shell and the cover plate.

9. The motor controller having a water-cooling structure according to claim 7, wherein: the heat exchanger is characterized by further comprising an IGBT module (5) and a direct-current filter capacitor (6), wherein the IGBT module (5) and the direct-current filter capacitor (6) are arranged on the outer side of the sealing shell (4), the IGBT module (5) is opposite to the heat exchanger (1), and the direct-current filter capacitor (6) is opposite to the second water channel (3).

10. The motor controller having a water-cooling structure according to claim 9, wherein: and heat conduction materials are arranged between the IGBT module (5) and the sealing shell (4) and between the direct current filter capacitor (6) and the sealing shell (4).

Images