Interlayer flow channel cooling structure and motor controller

Abstract

The utility model relates to the technical field of motor controllers of new energy non-road machinery, in particular to an interlayer flow channel cooling structure and a motor controller, the interlayer flow channel cooling structure comprises an interlayer flow channel which is suspended and erected, two ends of the interlayer flow channel are respectively provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the interlayer flow channel. The liquid inlet is used for being communicated with a liquid inlet formed in a lower-layer main runner, the liquid outlet is used for being communicated with a liquid return opening formed in the lower-layer main runner, and cooling liquid flows into the interlayer runner through the liquid inlet and the liquid inlet and flows out of the interlayer runner through the liquid outlet and the liquid return opening. And cooling liquid cools the heat source device when flowing through the interlayer flow channel. According to the interlayer flow channel cooling structure provided by the utility model, the main flow channel is arranged at the bottom of the main box body of the motor controller, and the suspended interlayer flow channel is arranged in the main box body and clings to a heat source device, so that heat can be well discharged, the cooling effect is improved, and the reliability and the service life of the motor controller are ensured.

Description

Technical Field

[0001] This utility model relates to the field of motor controller technology for new energy non-road machinery, specifically to a sandwich flow channel cooling structure and a motor controller. Background Technology

[0002] With the increasing application of new energy non-road machinery in the market, the use of motor controllers is also growing. The motor controller is a core component of new energy non-road machinery, playing a decisive role in its power performance. It receives commands from the vehicle controller and obtains electrical energy from the power battery. After precise modulation by the internal inverter, it outputs voltage and current that meet the motor's requirements, thereby driving the motor to operate.

[0003] The operating temperature of the motor controller directly affects the performance and safety of non-road machinery. If the heat generated inside the motor controller cannot be dissipated in time, the accumulated heat will cause the internal electronic components to fail or even cause a fire. Therefore, an efficient heat dissipation method is needed to ensure that the motor controller operates within a suitable temperature range, improve its reliability and service life, and thus ensure the stability and safety of non-road machinery.

[0004] Existing motor controllers generally use water cooling for heat dissipation, such as Figure 1 As shown, an inlet 41', an outlet 42', and internal cooling channels are provided at the bottom of the main housing 4' of the motor controller. Cold water enters from the inlet 41', passes through the cooling channels, and flows back to the water tank from the outlet 42', cooling the interior of the main housing 4' through the cooling channels. However, the cooling channels are only one layer at the bottom, and the internal structure of the motor controller is complex, resulting in only the components at the bottom being able to dissipate heat effectively, while the components in the middle and top have poor heat dissipation. Utility Model Content

[0005] To address the technical problem of poor cooling effect in the cooling structure of existing motor controllers, this utility model proposes a sandwiched flow channel cooling structure, which includes a sandwiched flow channel installed in the middle of the main housing of the motor controller. This structure works in conjunction with the main flow channel at the bottom of the main housing to better dissipate heat and improve the cooling effect.

[0006] The technical solution of this utility model:

[0007] A sandwich channel cooling structure includes a sandwich channel with an inlet and an outlet at each end. The inlet is connected to an inlet on a lower main channel, and the outlet is connected to a return outlet on the lower main channel. Coolant flows into the sandwich channel through the inlet and outlet and flows out through the outlet and return outlet. The sandwich channel is suspended and closely attached to a heat source device, and the coolant cools the heat source device as it flows through the sandwich channel.

[0008] Furthermore, the sandwich channel cooling structure also includes an inlet pipe and an outlet pipe with a certain height. The top end of the inlet pipe is connected to the inlet end of the sandwich channel, and the bottom end of the inlet pipe forms the inlet port. The top end of the outlet pipe is connected to the outlet end of the sandwich channel, and the bottom end of the outlet pipe forms the outlet port.

[0009] Furthermore, the sandwiched flow channel cooling structure includes a sandwiched shell, and the sandwiched flow channel is disposed within the sandwiched shell.

[0010] Furthermore, the sandwich shell includes a lower shell and an upper cover plate, the sandwich flow channel is provided between the lower shell and the upper cover plate, and the lower shell and the upper cover plate are also sealed by a sealing gasket.

[0011] Furthermore, the sandwich shell is provided with multiple mounting posts for fixed connection with the main housing below, and both the inlet end of the liquid inlet pipe and the outlet end of the liquid outlet pipe are provided with sealing plugs.

[0012] Furthermore, both the inlet end of the inlet pipe and the outlet end of the outlet pipe are formed with annular grooves. The sealing plug includes an annular bottom edge, an annular vertical edge, and an annular rib located inside the annular vertical edge. The annular rib is connected to the annular groove. The main housing is also provided with a connecting pipe that docks with the sealing plug.

[0013] Furthermore, the heat source device is a copper busbar, and a thermally conductive insulating pad is provided between the copper busbar and the outer bottom surface of the sandwich shell.

[0014] Furthermore, the copper busbar has an extension section for indirectly attaching to the outer bottom surface of the sandwich shell via a thermally conductive insulating pad.

[0015] Furthermore, there are three copper busbars, and each copper busbar is provided with a thermally conductive insulating pad between it and the outer bottom surface of the sandwich shell.

[0016] In another aspect, this utility model provides a motor controller, the motor controller including a main housing, the main housing having a sandwich channel cooling structure as described in any of the above; the bottom of the main housing is provided with the main channel, the two ends of the main channel are provided with a coolant inlet and a coolant outlet, and the main channel is provided with a liquid inlet and a liquid return outlet.

[0017] By adopting the above technical solution, the sandwich channel cooling structure and motor controller provided by this utility model have the following advantages compared with the prior art:

[0018] 1. In addition to the main flow channel at the bottom of the motor controller main housing, this utility model also has a suspended sandwich flow channel inside the main housing, which is in close contact with the heat source device to improve the overall heat dissipation effect and ensure the reliability and service life of the motor controller.

[0019] 2. This utility model has sealing plugs connected to the inlet and outlet pipes at both ends of the interlayer flow channel. The sealing plugs are engaged with the annular grooves on the inlet and outlet pipes by their annular protrusions, which can prevent the sealing plugs from falling off and make the installation of the interlayer shell more convenient.

[0020] 3. This utility model has a thermally conductive insulating pad between each of the three copper busbars and the bottom surface of the sandwich shell, which serves to insulate and transfer heat; in addition, the reasonable design of the copper busbars is more conducive to the space utilization and structural layout inside the main box. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the water-cooling structure of a motor controller in the prior art;

[0022] Figure 2 This is an exploded view of the cooling structure of the inner jacketed flow channel in the motor controller of this utility model;

[0023] Figure 3 This is a partial structural diagram of the main housing of the motor controller of this utility model;

[0024] Figure 4 This is a bottom view of the main housing of the motor controller of this utility model;

[0025] Figure 5 This is a schematic diagram of the inlet pipe and outlet pipe in the sandwich channel cooling structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the sandwich flow channel and the main flow channel of this utility model;

[0027] Figure 7 This is a cross-sectional view of the sealing plug of this utility model.

[0028] in,

[0029] Main tank 4', inlet 41', outlet 42';

[0030] The interlayer flow channel 1 has an inlet 11 and an outlet 12; the main flow channel 2 has an inlet 21 and an outlet 22; the interlayer outer shell 3 has a lower shell 31, an upper cover plate 32, a first screw 33, a sealing gasket 34, an inlet pipe 35, an outlet pipe 36, an annular groove 37, a mounting post 38, a second screw 381, a sealing plug 39, an annular bottom edge 391, a flow channel 3911, an annular vertical edge 392, and an annular rib 393; the main housing 4 has a coolant inlet 41, a coolant outlet 42, a connecting pipe 43, a copper busbar 44, a first copper busbar 441, a second copper busbar 442, a third copper busbar 443, an extension section 444, a first thermally conductive insulating pad 451, a second thermally conductive insulating pad 452, and a third thermally conductive insulating pad 453. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0035] Example 1:

[0036] like Figure 2-6 As shown, this embodiment provides a sandwich channel cooling structure that can be used in the main housing 4 of a motor controller. The sandwich channel cooling structure includes a sandwich channel 1, with an inlet 11 and an outlet 12 at both ends of the sandwich channel 1. A main channel 2 is also provided at the bottom of the main housing 4 of the motor controller. The main channel 2 has a coolant inlet 41 and a coolant outlet 42 at both ends. The coolant inlet 41 and the coolant outlet 42 can be located on the same side or on any two sides of the main housing 4. An inlet 21 and a return port 22 are also provided on the main channel 2. The sandwich channel 1 is suspended and located on the upper layer, and the main channel 2 is located on the lower layer. The inlet 11 at the inlet end of the sandwich channel 1 can communicate with the inlet 21 at the lower main channel 2, for example, by welding or by sealing. The outlet 12 at the outlet end of the sandwich channel 1 can communicate with the return port 22 at the lower main channel 2, for example, by welding or by sealing.

[0037] The coolant can be, but is not limited to, water or a mixture of water and ethylene glycol, etc. Under the action of a pump, the coolant flows from the coolant tank, enters the main channel 2 through the coolant inlet 41 on the main tank 4, flows into the interlayer channel 1 through the inlet 21 on the main channel 2 and the inlet 11 of the interlayer channel 1, then flows back into the main channel 2 through the outlet 12 of the interlayer channel 1 and the return outlet 22 on the main channel 2, and finally flows back into the water tank through the coolant outlet 42 on the main tank 4, forming a coolant circulation loop. The interlayer channel 1 can be suspended and closely attached to the heat source device by means of a bracket or other means, so that the coolant can cool the heat source device at the interlayer channel 1 when it flows through it.

[0038] Thus, the sandwiched flow channel cooling structure provided in this embodiment, compared with the prior art, has a sandwiched flow channel 1 in the main housing 4 of the motor controller. In addition to heat dissipation through the main flow channel 2 in the lower layer, it can also cool the heat source devices in the main housing 4 in a targeted manner through the sandwiched flow channel 1 suspended in the upper layer, thereby improving the local heat dissipation effect and ensuring the reliability and service life of the motor controller.

[0039] Furthermore, the sandwiched flow channel cooling structure provided in this embodiment can be directly modified on the existing motor controller main housing 4. For example, two through holes can be directly opened on the existing main flow channel 2 at the bottom of the main housing 4 to form the liquid inlet 21 and the liquid return port 22. In addition to flowing in the existing main flow channel 2, the coolant can also be drawn out and flow through the sandwiched flow channel 1. Of course, in other embodiments, the main flow channel 2 can also be redesigned so that the coolant flows into the sandwiched flow channel 1 after passing through the liquid inlet 21 and then flows out to the liquid return port 22.

[0040] Furthermore, the sandwich channel cooling structure of this embodiment also includes an inlet pipe 35 and an outlet pipe 36 with a certain height. The top end of the inlet pipe 35 is connected to the inlet end of the sandwich channel 1, and the bottom end of the inlet pipe 35 forms the inlet port 11. The top end of the outlet pipe 36 is connected to the outlet end of the sandwich channel 1, and the bottom end of the outlet pipe 36 forms the outlet port 12. The inlet pipe 35 and the outlet pipe 36 can directly raise the sandwich channel 1 to a set height, thereby facilitating the cooling of heat source devices at specific locations.

[0041] Furthermore, the sandwiched flow channel cooling structure also includes a sandwiched outer shell 3, within which the sandwiched flow channel 1 is sealed, and the liquid inlet pipe 35 and the liquid outlet pipe 36 are provided on the sandwiched outer shell 3. The shape of the sandwiched flow channel 1 can be configured as needed, for example, as a serpentine flow channel, which can improve the heat dissipation effect; similarly, the shape of the main flow channel 2 can also be configured as needed.

[0042] The sandwich shell 3 includes a lower shell 31 and an upper cover plate 32. The lower shell 31 is provided with a plurality of threaded connecting seats. The upper cover plate 32 is connected to the lower shell 31 by a plurality of first screws 33, and a sealing gasket 34 made of rubber or other materials is provided between the two for sealing. The sandwich flow channel 1 is disposed between the lower shell 31 and the upper cover plate 32. Of course, in other embodiments, the lower shell 31 and the upper cover plate 32 can also be connected by welding or other methods, or they can be integrally formed.

[0043] The lower housing 31 of the sandwich shell 3 is also provided with multiple mounting posts 38. Each mounting post 38 can be connected to the inner bottom surface of the main housing 4 by a second screw 381. The number of mounting posts 38 can be set as needed. The inlet end of the liquid inlet pipe 35 and the outlet end of the liquid outlet pipe 36 are both provided with sealing plugs 39. When the sandwich shell 3 is installed in the main housing 4 by the mounting posts 38, the sealing plugs 39 can achieve the sealing between the liquid inlet pipe 35 and the main channel 2, and the sealing between the liquid outlet pipe 36 and the main channel 2.

[0044] Preferably, both the inlet end of the inlet pipe 35 and the outlet end of the outlet pipe 36 are formed with annular grooves 37; for example Figure 7The sealing plug 39 includes an annular bottom edge 391, an annular vertical edge 392, and an annular rib 393. A flow channel 3911 is formed in the middle of the annular bottom edge 391, through which coolant can flow in or out. The annular vertical edge 392 is located on the outer ring of the annular bottom edge 391, and the annular rib 393 is located on the inner side of the middle of the annular vertical edge 392, for engaging with the annular groove 37. The sealing plug 39 may be, but is not limited to, made of rubber, and can be fitted onto the inlet end of the inlet pipe 35 and the outlet end of the outlet pipe 36, with the annular rib 393 engaging with the annular groove 37. Thus, the sealing plug 39 can be directly and securely fitted onto the inlet pipe 35 and the outlet pipe 36. Compared to the traditional method of sealing with O-rings, installation is more convenient, and the sealing plug 39 will not fall off or be lost during installation or disassembly of the interlayer shell 3.

[0045] In this embodiment, two connecting pipes 43 are provided on the inner bottom surface of the main housing 4, corresponding to the inlet pipe 35 and the outlet pipe 36. When installing the sandwich shell 3, the inlet pipe 35 and the outlet pipe 36, together with the sealing plugs 39 at their bottom ends, are inserted into the corresponding connecting pipes 43. The sealing is achieved by the annular bottom edge 391 and the annular vertical edge 392 of the sealing plug 39, which greatly improves the sealing effect and prevents the leakage of coolant.

[0046] Furthermore, the heat source device in this embodiment can be any heat-generating device within the main housing 4. Preferably, the heat source device is a copper busbar 44, which can be a positive copper busbar, a negative copper busbar, or a three-phase copper busbar. A thermally conductive insulating pad 45 is also provided between the copper busbar 44 and the outer bottom surface of the interlayer housing 3. The thermally conductive insulating pad 45 can be, but is not limited to, a silicone sheet. Its shape and thickness can be set as needed. One side is attached to the lower housing 31 of the interlayer housing 3, and the other side is attached to the copper busbar 44, serving to insulate and transfer heat.

[0047] The copper busbar 44 also has an extension section 444, through which the copper busbar 44 extends to the bottom of the sandwich shell 3, and is indirectly attached to the outer bottom surface of the sandwich shell 3 via a thermally conductive insulating pad 45. For example, the heights of the aforementioned inlet pipe 35 and outlet pipe 36 can be set to be the same, so that the bottom surface of the sandwich shell 3 is a horizontal plane. The copper busbar 44 is bent once or multiple times to form a horizontal extension section 444 extending to the bottom of the sandwich shell 3, which facilitates the utilization of space and structural arrangement within the main housing 4.

[0048] The number of copper busbars 44 can be one or more. For example, there may be three copper busbars 44 corresponding to three phases, namely a first copper busbar 441, a second copper busbar 442, and a third copper busbar 443. The first copper busbar 441 has an extension section 444 leading to the left front side of the bottom of the sandwich shell 3. A first thermally conductive insulating pad 451 is also provided between the first copper busbar 441 and the sandwich shell 3. The second copper busbar 442 extends to the rear side of the bottom of the sandwich shell 3. A second thermally conductive insulating pad 452 is also provided between the second copper busbar 442 and the sandwich shell 3. The third copper busbar 443 extends to the right front side of the bottom of the sandwich shell 3. A third thermally conductive insulating pad 453 is also provided between the third copper busbar 443 and the sandwich shell 3. This arrangement covers the bottom of the sandwich shell 3. When the number of copper busbars 44 that need heat dissipation increases or decreases, the size of the sandwich shell 3 can be adaptively increased or decreased.

[0049] This embodiment provides a sandwich-type flow channel cooling structure that can be used in the motor controller of new energy non-road machinery. The coolant in the coolant tank of the new energy non-road machinery enters the lower main flow channel 2 from the coolant inlet 41 on the main housing 4, flows into the sandwich flow channel 1 through the inlet 21 on the main flow channel 2 and the inlet 11 on the sandwich flow channel 1, then flows out through the outlet 12 of the sandwich flow channel 1 and the return outlet 22 on the main flow channel 2, returning to the main flow channel 2, and finally flows back into the coolant tank through the coolant outlet 42 on the main housing 4, forming a coolant circulation loop. The heat from the first copper busbar 441, the second copper busbar 442, and the third copper busbar 443 is transferred to the lower housing 31 of the sandwich outer shell 3 through the first thermally conductive insulating pad 451, the second thermally conductive insulating pad 452, and the third thermally conductive insulating pad 463, respectively, and is then carried away by the coolant in the sandwich flow channel 1 for heat conduction and cooling.

[0050] As can be seen from the above, the sandwiched flow channel cooling structure provided in this embodiment, in addition to setting the main flow channel at the bottom of the main housing of the motor controller, also has a sandwiched flow channel inside the main housing of the motor controller, which can effectively dissipate heat, improve the cooling effect, and ensure the reliability and service life of the motor controller.

[0051] Example 2:

[0052] This embodiment provides a motor controller. The bottom of the main housing 4 of the motor controller is provided with a main flow channel 2. In addition, a sandwich flow channel cooling structure as described in Embodiment 1 is also provided inside the main housing 4. Heat is dissipated together through the main flow channel 2 and the sandwich flow channel 1, which improves the heat dissipation effect, ensures the reliability and service life of the motor controller, and thus ensures the stability and safety of new energy non-road machinery.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sandwich-type flow channel cooling structure, characterized in that, The device includes a sandwiched flow channel (1), with an inlet (11) and an outlet (12) at both ends. The inlet (11) is connected to the inlet (21) on the lower main flow channel (2), and the outlet (12) is connected to the return outlet (22) on the lower main flow channel (2). Coolant flows into the sandwiched flow channel (1) through the inlet (21) and the inlet (11), and flows out of the sandwiched flow channel (1) through the outlet (12) and the return outlet (22). The sandwiched flow channel (1) is suspended and closely attached to the heat source device. When the coolant flows through the sandwiched flow channel (1), it cools the heat source device.

2. The sandwich channel cooling structure according to claim 1, characterized in that, The sandwich channel cooling structure also includes an inlet pipe (35) and an outlet pipe (36) with a certain height. The top end of the inlet pipe (35) is connected to the inlet end of the sandwich channel (1), and the bottom end of the inlet pipe (35) forms the inlet port (11). The top end of the outlet pipe (36) is connected to the outlet end of the sandwich channel (1), and the bottom end of the outlet pipe (36) forms the outlet port (12).

3. The sandwich channel cooling structure according to claim 2, characterized in that, The sandwich cooling structure includes a sandwich shell (3), and the sandwich channel (1) is disposed inside the sandwich shell (3).

4. The sandwich channel cooling structure according to claim 3, characterized in that, The sandwich shell (3) includes a lower shell (31) and an upper cover plate (32). The sandwich flow channel (1) is provided between the lower shell (31) and the upper cover plate (32). The lower shell (31) and the upper cover plate (32) are also sealed by a sealing gasket (34).

5. The sandwich channel cooling structure according to claim 3 or 4, characterized in that, The sandwich shell (3) is provided with multiple mounting posts (38) for fixed connection with the main box (4) below. The inlet end of the liquid inlet pipe (35) and the outlet end of the liquid outlet pipe (36) are both provided with sealing plugs (39).

6. The sandwich channel cooling structure according to claim 5, characterized in that, The inlet end of the inlet pipe (35) and the outlet end of the outlet pipe (36) are both formed with annular grooves (37). The sealing plug (39) includes annular bottom edge (391), annular vertical edge (392) and annular rib (393) located inside the annular vertical edge (392). The annular rib (393) is connected to the annular groove (37). The main box (4) is also provided with a connecting pipe (43) that connects to the sealing plug (39).

7. The sandwich channel cooling structure according to claim 3 or 4, characterized in that, The heat source device is a copper busbar (44), and a thermally conductive insulating pad (45) is provided between the copper busbar (44) and the bottom surface of the sandwich shell (3).

8. The sandwich channel cooling structure according to claim 7, characterized in that, The copper busbar (44) has an extension (444) for indirectly attaching to the outer bottom surface of the sandwich shell (3) via a thermally conductive insulating pad (45).

9. The sandwich channel cooling structure according to claim 8, characterized in that, There are three copper busbars (44), and each copper busbar (44) is provided with a thermally conductive insulating pad (45) between it and the bottom surface of the sandwich shell (3).

10. A motor controller, characterized in that, The motor controller includes a main housing (4), which is provided with a sandwich flow channel cooling structure as described in any one of claims 1-9; the main housing (4) is provided with a main flow channel (2) at the bottom, and the main flow channel (2) is provided with a coolant inlet (41) and a coolant outlet (42) at both ends, and the main flow channel (2) is provided with a liquid inlet (21) and a liquid return outlet (22).

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