Motor controller with circulating liquid cooling structure and cooling method thereof

Abstract

The invention relates to the technical field of motor controllers, in particular to a motor controller with a circulating liquid cooling structure and a cooling method of the motor controller. The mounting partition plate is fixed in the motor controller body; the plurality of heat dissipation openings are formed in the side surface of the motor controller body; the cooling structure is arranged on the top surface of the mounting partition plate; the driving structure is arranged in the motor controller body; and the two suction structures are both arranged on the driving structure, and when the driving structure operates, the two suction structures operate along with the driving structure. Compared with the prior art, the cooling liquid circularly flowing in the inner-layer pipe directly cools the outer-layer pipe around the heating component, the heat exchange efficiency of the direct contact type is far higher than that of traditional air convection heat dissipation, a large amount of heat can be rapidly taken away, and the air flow between the outer-layer pipe and the inner-layer pipe improves the heat dissipation efficiency of the heating component. A secondary heat dissipation effect is formed, and the overall heat dissipation capability is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor controllers, and in particular to a motor controller with a liquid circulation cooling structure and a cooling method thereof. Background Art

[0002] A motor controller is an integrated circuit that actively controls the motor to operate in a set direction, speed, angle, and response time. It is widely used in many fields, including electric vehicles, home appliances, industrial control, and military.

[0003] After searching, the Chinese patent with the announcement number CN219660226U discloses a cooling water channel structure of a motor controller and a motor controller structure. The cooling water channel structure includes: a water channel housing for conducting the heat generated in the motor controller; a water channel cover plate, assembled with the water channel housing to form a cooling water channel, and the cooling water channels include a first cooling water channel, a second cooling water channel, and a third cooling water channel. The above scheme improves the heat dissipation capacity of the motor controller and prolongs the service life of related components by providing cooling water channels for the power module, the copper bus and the capacitor; at the same time, the control board and the water channel housing, and the control board and the drive board in the motor controller structure are installed by using the first connector and the second connector, which can not only enhance the vibration resistance of the motor controller, but also reduce the assembly steps, saving installation time and cost. However, the above scheme still has the following shortcomings when it is actually used:

[0004] The above scheme only uses water cooling to cool the heat-prone components in the motor controller. The water cooling system usually dissipates heat by directly contacting or indirectly flowing the cooling medium through the heat-generating components. However, this cooling method can often only be performed on specific components that are easy to arrange cooling pipes or heat sinks, such as IGBT modules, capacitors, etc. For other components inside the controller that are difficult to directly contact, the cooling effect of the water cooling system will be greatly reduced, resulting in uneven temperature distribution of the entire controller, and some areas may still be in a high temperature state.

[0005] Therefore, the present application provides a motor controller with a liquid circulation cooling structure and a cooling method thereof. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a motor controller with a liquid cooling structure and a cooling method thereof.

[0007] Based on the above purpose, the present invention provides a motor controller with a liquid cooling structure, comprising:

[0008] Motor controller body;

[0009] An installation partition is fixed inside the motor controller body;

[0010] A plurality of heat dissipation openings are provided on the side of the motor controller body;

[0011] A cooling structure, arranged on the top surface of the mounting baffle;

[0012] A driving structure, arranged inside the motor controller body;

[0013] Two suction structures are both arranged on the driving structure, and when the driving structure is in operation, the two suction structures are operated accordingly;

[0014] The coolant storage box is fixed on the inner bottom surface of the motor controller body and stores coolant inside.

[0015] Preferably, the cooling structure comprises:

[0016] An outer tube fixed to the top surface of the mounting baffle;

[0017] An inner tube is fixed inside the outer tube, a gap is formed between the inner tube and the outer tube, liquid flows inside the inner tube, and gas flows in the gap between the inner tube and the outer tube;

[0018] A plurality of air outlets are arranged on one side of the outer tube.

[0019] Preferably, both the outer tube and the inner tube are in a serpentine tubular structure, and the outer tube is evenly distributed on the top surface of the mounting partition.

[0020] Preferably, the driving structure comprises:

[0021] A fixing frame, which has a U-shaped structure and is fixed to the inner bottom surface of the motor controller body;

[0022] A motor, mounted at one end of the fixing frame;

[0023] A reciprocating screw rod, one end of which is fixedly connected to the output shaft of the motor, and the other end of which is rotatably mounted on the side of the fixed frame;

[0024] A first guide rod, fixed on the fixing frame;

[0025] The movable seat is threadably sleeved on the reciprocating screw rod and slidably sleeved on the first guide rod.

[0026] Preferably, the suction structure comprises:

[0027] A capsule body, one end of which is connected to the side of the fixed frame, and the other end of which is connected to the side of the movable seat, and the capsule body is in a long strip structure;

[0028] Two installation tubes, both communicated with the capsule;

[0029] Two one-way valves are respectively installed on the two installation pipes.

[0030] Preferably, the motor controller body is provided with a dust cleaning structure, a pushing structure, a pulling structure and a reset structure, and the dust cleaning structure includes:

[0031] A dust cleaning plate is slidably arranged on the side of the motor controller body, and the moving stroke of the dust cleaning plate covers a plurality of heat dissipation ports;

[0032] Two guide openings are respectively provided at the upper and lower ends of the dust cleaning plate;

[0033] Two second guide rods are fixed on the side of the motor controller body and pass through the two guide openings respectively;

[0034] A plurality of brushes are arranged on the side of the dust cleaning plate and contact the side of the motor controller body;

[0035] A first tension spring has one end connected to the dust cleaning plate and the other end connected to the motor controller body.

[0036] Preferably, the pushing structure comprises:

[0037] An outer cylinder is fixed to the side of the movable seat and has an opening at one end;

[0038] An inner rod, movably inserted in the outer tube, with one end extending to the outside of the outer tube;

[0039] A spring, one end of which is connected to the outer cylinder, and the other end of which is connected to the inner rod;

[0040] The first control block is detachably arranged at one end of the inner rod located outside the outer tube, and an inclined surface is arranged on the first control block.

[0041] Preferably, the pulling structure comprises:

[0042] Two third guide rods are fixed to the inner bottom surface of the motor controller body, and each of the third guide rods is in a U-shaped structure;

[0043] A sliding block, which is slidably sleeved on the two third guide rods;

[0044] A connecting wire, one end of which is connected to the sliding block, and the other end of which extends to the outside of the motor controller body and is connected to the dust cleaning plate;

[0045] A second tension spring, one end of which is connected to the sliding block, and the other end of which is connected to the inner bottom surface of the motor controller body;

[0046] A sliding opening is provided on the sliding block;

[0047] A slide plate is slidably disposed in the slide opening, with both ends extending to the outside of the slide opening;

[0048] A second control block is fixed to one end of the slide plate, the second control block is provided with an inclined surface, and the second control block is arranged opposite to the first control block;

[0049] The limiting sleeve is fixedly sleeved on the slide plate, and the side surface of the limiting sleeve is in contact with the side surface of the movable seat.

[0050] Preferably, the reset structure comprises:

[0051] A connecting rod, one end of which is fixedly connected to the inner surface of the motor controller body;

[0052] The extrusion plate is fixed on the other end of the connecting rod. The extrusion plate is provided with an inclined surface, and the inclined surface of the extrusion plate is arranged opposite to the other end of the slide plate.

[0053] A cooling method for a motor controller having a liquid circulation cooling structure comprises the following steps:

[0054] Step 1: Start the motor to make it start running. The motor drives the reciprocating screw to rotate. Under the guidance of the first guide rod, the rotation of the reciprocating screw is converted into the reciprocating movement of the moving seat;

[0055] Step 2: The two capsules are operated alternately, and the coolant flows in the inner tube to cool the inner tube and the outer tube, and then flows back to the coolant storage box through the return pipe to complete a cycle. The gas flows between the outer tube and the inner tube and is cooled by the coolant in the inner tube;

[0056] Step 3: The cooled gas is ejected through a plurality of air outlets on the outer tube and re-enters the interior of the motor controller body to cool the interior space with air;

[0057] Step 4: During the reciprocating movement of the moving seat, the first control block cooperates with the second control block to drive the sliding block and the dust cleaning plate to reciprocate, and the bristles on the dust cleaning plate brush away the dust attached to the heat dissipation port during the movement to keep the heat dissipation port unobstructed;

[0058] Step 5. When the moving seat moves to the other end and returns, the first control block is separated from the second control block, and the sliding block and the cleaning plate are reset under the action of the spring to prepare for the next cleaning action. At the same time, the circulation of coolant and gas continues to maintain continuous cooling of the motor controller.

[0059] Beneficial effects of the present invention:

[0060] 1. The coolant circulates in the inner tube to directly cool the outer tube around the heat-generating component. This direct contact heat exchange efficiency is much higher than the traditional air convection heat dissipation, and can quickly take away a large amount of heat. The gas flow between the outer tube and the inner tube and the low-temperature gas ejected through the air outlet further cool the internal space of the equipment, forming a secondary heat dissipation effect and enhancing the overall heat dissipation capacity. The combination of water cooling and air cooling not only reduces the temperature of the heat-generating component, but also makes the temperature distribution inside the equipment more uniform through the flow of gas, reduces local overheating, and protects the stability and life of the internal components of the equipment.

[0061] 2. The heat dissipation port is an important channel for airflow exchange inside and outside the equipment. If it is blocked by dust, the heat dissipation effect will be seriously affected. Regular dust cleaning can ensure that the heat dissipation port is unobstructed, so that the heat inside the equipment can be discharged in time and the normal operating temperature of the equipment can be maintained. Without manual intervention, the dust cleaning plate and its bristles can automatically clean the heat dissipation port, which greatly reduces the maintenance burden and improves the automation of the equipment.

[0062] 3. The serpentine tubular structure ensures that the flow path of the coolant in the inner tube is longer and more complex, allowing the coolant to contact the inner tube more fully, thereby achieving uniform cooling of components such as circuit boards. This design avoids local overheating and improves heat dissipation efficiency. The serpentine tubular structure not only prolongs the flow time of the coolant in the inner tube, but also correspondingly prolongs the flow time of the gas between the outer tube and the inner tube. This allows the gas to contact the low-temperature surface on the inner tube more fully, thereby being cooled more effectively. Ultimately, the gas ejected from the air outlet has a sufficiently low temperature, which enhances the effect of air cooling;

[0063] 4. When cleaning is not required, the first control block can be removed to keep the cleaning plate and bristles still, avoiding unnecessary movement and wear and extending the service life of the bristles. The independent control mechanism allows staff to clean the dust on the bristles more easily, and the maintenance process is simpler and faster. This design allows the cooling mechanism and the cleaning mechanism to operate independently. Staff can choose whether to start both at the same time according to actual needs, which improves the flexibility of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0065] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention;

[0066] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0067] Figure 3 is a schematic diagram of the cooling structure;

[0068] Figure 4 It is a structural schematic diagram of another perspective of the present invention;

[0069] Figure 5 It is a schematic diagram of the structure inside the motor controller body;

[0070] Figure 6 It is a schematic diagram of the cross-sectional structure of the motor controller body;

[0071] Figure 7 It is a schematic diagram of the structure of the driving structure and two suction structures;

[0072] Figure 8 It is a structural schematic diagram of a pulling structure and a reset structure;

[0073] Fig. 9 for Figure 3 A magnified view of the structure at A;

[0074] Fig.10 for Figure 4 A magnified view of the structure at B;

[0075] Fig.11 for Figure 5 A magnified view of the structure at C;

[0076] Fig.12 for Figure 6 Enlarged view of the structure at D.

[0077] The markings in the figure are:

[0078] 1. Motor controller body; 2. Mounting partition; 3. Heat dissipation port; 41. Outer tube; 42. Inner tube; 43. Air outlet; 51. Fixed frame; 52. Motor; 53. Reciprocating screw; 54. First guide rod; 55. Moving seat; 61. Capsule; 62. Mounting tube; 63. One-way valve; 7. Coolant storage box; 81. Cleaning plate; 82. Guide port; 83. Second guide rod; 84. Bristles; 85. First tension spring; 91. Outer tube; 92. Inner rod; 93. Spring; 94. First control block; 101. Third guide rod; 102. Sliding block; 103. Connecting thread; 104. Second tension spring; 105. Sliding port; 106. Slide plate; 107. Second control block; 108. Limiting sleeve; 111. Connecting rod; 112. Extrusion plate. DETAILED DESCRIPTION

[0079] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0080] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0081] like Figures 1 to 12 As shown, the motor controller with a circulating liquid cooling structure includes a motor controller body 1; a mounting partition 2 fixed inside the motor controller body 1; a plurality of heat dissipation ports 3, all of which are opened on the side of the motor controller body 1, and a coolant storage box 7, fixed on the inner bottom surface of the motor controller body 1, and having coolant stored inside;

[0082] like Figure 2 , Figure 3 , Fig. 9 As shown, the motor controller also includes a cooling structure, which is arranged on the top surface of the mounting baffle 2, and the cooling structure includes: an outer tube 41, which is fixed on the top surface of the mounting baffle 2; an inner tube 42, which is fixed inside the outer tube 41, and there is a gap between the inner tube 42 and the outer tube 41, liquid flows inside the inner tube 42, and gas flows in the gap between the inner tube 42 and the outer tube 41, the outer tube 41 and the inner tube 42 are both serpentine tube structures, and the outer tube 41 is evenly distributed on the top surface of the mounting baffle 2; a plurality of air outlet holes 43, which are all opened on one side of the outer tube 41;

[0083] like Figure 2 , Figure 4 , Fig.10As shown, the motor controller also includes a driving structure, which is arranged inside the motor controller body 1, and the driving structure includes: a fixed frame 51, which is in a U-shaped structure and fixed to the inner bottom surface of the motor controller body 1; a motor 52, which is installed at one end of the fixed frame 51; a reciprocating screw rod 53, one end of which is fixedly connected to the output shaft of the motor 52, and the other end is rotatably installed on the side of the fixed frame 51; a first guide rod 54, which is fixed on the fixed frame 51; a moving seat 55, which is threadedly sleeved on the reciprocating screw rod 53 and slidably sleeved on the first guide rod 54;

[0084] like Figures 5 to 8 As shown, the motor controller also includes two suction structures, both of which are arranged on the driving structure. When the driving structure is in operation, the two suction structures are operated accordingly. The suction structure includes: a capsule 61, one end of which is connected to the side of the fixed frame 51, and the other end is connected to the side of the movable seat 55. The capsule 61 is a long strip structure; two mounting tubes 62, both of which are connected to the capsule 61; two one-way valves 63, which are respectively installed on the two mounting tubes 62;

[0085] When the motor controller proposed by the present invention is in use, the motor 52 runs and drives the reciprocating screw 53 to rotate. Under the guidance of the first guide rod 54, the reciprocating screw 53 can drive the moving seat 55 to reciprocate when rotating. The moving seat 55 can continuously squeeze and stretch the two capsules 61 when reciprocating. Specifically, when the moving seat 55 moves toward one end of the fixed frame 51, the moving seat 55 can stretch one of the capsules 61 and squeeze the other capsule 61. When the moving seat 55 moves toward the other end of the fixed frame 51, the squeezed capsule 61 can be stretched, and the stretched capsule 61 will be squeezed. For the two capsules 61, one of the capsules 61 is used to pump gas, and the other capsule 61 is used to pump liquid. For the sac 61 for pumping gas, one of the mounting tubes 62 thereon is connected to the internal space of the motor controller body 1, and the other mounting tube 62 is connected to the side of the outer tube 41 away from the plurality of air outlet holes 43. For the sac 61 for pumping liquid, one of the mounting tubes 62 thereon is connected to the coolant storage box 7, and the other mounting tube 62 is connected to one end of the inner tube 42, and the other end of the inner tube 42 is connected to the coolant storage box 7 through a return pipe. In addition, the flow limiting directions of the two one-way valves 63 on the sac 61 are opposite. Specifically, one of the one-way valves 63 limits the gas or liquid to only enter the interior of the sac 61, and the other one-way valve 63 limits the gas or liquid to only flow out of the sac 61. Therefore, when the bladder 61 is stretched, the bladder 61 can perform a suction action, and when the bladder 61 is compressed, the bladder 61 can perform a discharge action. In summary, during the reciprocating movement of the movable seat 55, one of the bladders 61 can continuously extract the coolant in the coolant storage box 7 and pump the coolant into the interior of the inner tube 42. Further, after the coolant flows through the inner tube 42, it will flow back to the interior of the coolant storage box 7 through the reflux pipe, so that the coolant circulates between the coolant storage box 7 and the inner tube 42, and the other bladder 61 can continuously extract the air inside the motor controller body 1, and pump the gas between the outer tube 41 and the inner tube 42, so that the gas flows between the outer tube 41 and the inner tube 42, further. Step by step, the gas will be ejected through a plurality of air outlet holes 43 and discharged back into the interior of the motor controller body 1. During the process of the coolant flowing in the inner tube 42, the inner tube 42 and the outer tube 41 can be cooled, so that the outer tube 41 cools the circuit board and other components in the motor controller body 1, thereby achieving the purpose of water cooling. At the same time, the coolant flowing in the inner tube 42 can also cool the gas flowing between the outer tube 41 and the inner tube 42. The cooled gas will be ejected into the interior of the motor controller body 1 through the air outlet holes 43. The low-temperature gas can cool the internal space of the motor controller body 1, thereby achieving the effect of air cooling. The heat dissipation method combining water cooling and air cooling can ensure the cooling effect for the motor controller body 1.

[0086] It is worth noting that the outer tube 41 and the inner tube 42 are both serpentine tube structures, which can ensure the uniformity of cooling of components such as circuit boards by water cooling. In addition, the serpentine tube structure can also prolong the flow time of the gas between the outer tube 41 and the inner tube 42, ensuring the cooling effect of the coolant on the gas, so that the gas ejected from the plurality of air outlets 43 has a sufficiently low temperature. Secondly, the outer tube 41 and the inner tube 42 are both made of pure copper material, thereby ensuring the low-temperature conduction effect of the outer tube 41 and the inner tube 42. For the coolant storage box 7, a device for cooling the coolant is provided therein, such as a semiconductor refrigeration sheet, so that the circulating coolant always has a sufficiently low temperature. The cooling method of the coolant is a prior art, which is not shown in the figure and will not be described in detail here.

[0087] like Figures 5 to 8 As shown, the motor controller body 1 is provided with a dust cleaning structure, a pushing structure, a pulling structure and a reset structure, and the dust cleaning structure includes: a dust cleaning plate 81, which is slidably arranged on the side of the motor controller body 1, and the moving stroke of the dust cleaning plate 81 covers a plurality of heat dissipation ports 3; two guide ports 82, which are respectively opened at the upper and lower ends of the dust cleaning plate 81; two second guide rods 83, which are both fixed on the side of the motor controller body 1 and pass through the two guide ports 82 respectively; a plurality of bristles 84, which are all arranged on the side of the dust cleaning plate 81 and contact the side of the motor controller body 1; a first tension spring 85, one end of which is connected to the dust cleaning plate 81, and the other end of which is connected to the motor controller body 1, and the first tension spring 85 is used for automatic reset of the dust cleaning plate 81;

[0088] like Figures 5 to 8 As shown, the pushing structure includes: an outer cylinder 91, which is fixed to the side of the moving seat 55 and has an open end; an inner rod 92, which is movably inserted in the outer cylinder 91 and has one end extending to the outside of the outer cylinder 91; a spring 93, which is connected to the outer cylinder 91 at one end and to the inner rod 92 at the other end; a first control block 94, which is detachably arranged at one end of the inner rod 92 located outside the outer cylinder 91, and an inclined surface is arranged on the first control block 94;

[0089] like Figures 5 to 8As shown, the pulling structure includes: two third guide rods 101, both fixed to the inner bottom surface of the motor controller body 1, and each third guide rod 101 is a U-shaped structure; a sliding block 102, which is slidably sleeved on the two third guide rods 101; a connecting wire 103, one end of which is connected to the sliding block 102, and the other end extends to the outside of the motor controller body 1 and is connected to the dust cleaning plate 81; a second tension spring 104, one end of which is connected to the sliding block 102, and the other end is connected to the inner bottom surface of the motor controller body 1; a sliding port 105, which is opened on the sliding block 102; a sliding plate 106, which is slidably arranged in the sliding port 105, and both ends are The second control block 107 is fixed to one end of the slide 106, and an inclined surface is provided on the second control block 107, and the second control block 107 is arranged opposite to the first control block 94. The limit sleeve 108 is fixedly sleeved on the slide 106, and the side of the limit sleeve 108 is in contact with the side of the movable seat 55. The reset structure includes: a connecting rod 111, one end of which is fixedly connected to the inner surface of the motor controller body 1; an extrusion plate 112 is fixed to the other end of the connecting rod 111, and an inclined surface is provided on the extrusion plate 112, and the inclined surface of the extrusion plate 112 is arranged opposite to the other end of the slide 106;

[0090] The motor controller body 1 also has the function of cleaning the dust attached to the heat dissipation port 3 to prevent the dust from clogging the heat dissipation port 3, so that the gas can smoothly pass through the heat dissipation port 3 for convection, thereby ensuring the heat dissipation performance of the motor controller body 1. Specifically, in the initial state, the sliding block 102 is located at one end of the two third guide rods 101, and the dust cleaning plate 81 is located at one end of a plurality of heat dissipation ports 3. When the movable seat 55 moves toward one end of the fixed frame 51, the inclined surface of the first control block 94 will contact the inclined surface of the second control block 107 and squeeze each other. Since the sliding block 102 is in an immovable state, the first control block 94 will move under the action of the inclined surface of the second control block 107, so that the inner rod 92 will retract into the outer tube 91 and squeeze the spring 93. When the first control block 94 is separated from the second control block 107, the inner rod 92 will pop out from the outer tube 91 under the action of the spring 93, so that the first control block 94 is automatically reset.

[0091] Furthermore, when the movable seat 55 moves toward the other end of the fixed frame 51, the vertical surface of the first control block 94 pushes the vertical surface of the second control block 107, so that the second control block 107 moves. When the second control block 107 moves, it can drive the sliding block 102 to move through the slide plate 106. When the sliding block 102 moves, it can pull the cleaning plate 81 to move through the connecting wire 103. In the process of the first control block 94 pushing the second control block 107 to move, the slide plate 106 will contact the inclined surface of the extrusion plate 112 and move upward along the inclined surface of the extrusion plate 112, which makes the second control block 107 move upward accordingly until the first control block 94 is separated from the second control block 107. When the first control block 94 is separated from the second control block 107, When the first control block 94 no longer applies a thrust to the second control block 107, the sliding block 102 will be reset under the elastic force of the second tension spring 104. When the sliding block 102 is reset, it will no longer apply a pulling force to the cleaning plate 81 through the connecting wire 103, and the cleaning plate 81 will be reset under the elastic force of the first tension spring 85. In summary, during the reciprocating movement of the movable seat 55, the sliding block 102 will reciprocate under the cooperation of the first control block 94 and the second control block 107, which makes the cleaning plate 81 reciprocate. During the movement of the cleaning plate 81, the bristles 84 thereon can brush off the dust attached to the plurality of heat dissipation ports 3, play the role of cleaning and unblocking the plurality of heat dissipation ports 3, and ensure the smooth convection of the airflow inside and outside the motor controller body 1;

[0092] It is worth mentioning that the first control block 94 and the inner rod 92 are detachably arranged. When the staff removes the first control block 94 from the inner rod 92, the reciprocating movement of the movable seat 55 will not drive the sliding block 102 to move reciprocatingly, which makes the sliding block 102 and the cleaning plate 81 in a stationary state. Therefore, the staff can operate the cooling mechanism and the cleaning mechanism of the motor controller body 1 separately. When there is no need to clean the heat dissipation port 3, the staff can control the operation of the cooling mechanism separately, which can avoid the movable seat 55 and the cleaning plate 81 being always in a linked state, avoid unnecessary wear of the bristles 84, and also facilitate the staff to clean the dust on the bristles 84. The disassembly and assembly method between the first control block 94 and the inner rod 92 is a prior art, which is not shown in the figure and will not be elaborated on here.

[0093] The present invention also discloses a cooling method for a motor controller having a liquid circulation cooling structure, comprising the following steps:

[0094] Step 1: Start the motor 52 to start running. The motor 52 drives the reciprocating screw rod 53 to rotate. Under the guidance of the first guide rod 54, the rotation of the reciprocating screw rod 53 is converted into the reciprocating movement of the moving seat 55.

[0095] Step 2: The two capsules 61 operate alternately, the coolant flows in the inner tube 42, cools the inner tube 42 and the outer tube 41, and then flows back to the coolant storage box 7 through the return pipe, completing a cycle, the gas flows between the outer tube 41 and the inner tube 42, and is cooled by the coolant in the inner tube 42;

[0096] Step 3: The cooled gas is ejected through the plurality of gas outlet holes 43 on the outer tube 41 and re-enters the interior of the motor controller body 1 to cool the interior space with air;

[0097] Step 4: During the reciprocating movement of the movable seat 55, the first control block 94 cooperates with the second control block 107 to drive the sliding block 102 and the dust cleaning plate 81 to reciprocate, and the bristles 84 on the dust cleaning plate 81 brush away the dust attached to the heat dissipation port 3 during the movement to keep the heat dissipation port 3 unobstructed;

[0098] Step 5. When the movable seat 55 moves to the other end and returns, the first control block 94 separates from the second control block 107, and the sliding block 102 and the cleaning plate 81 are reset under the action of the spring 93 to prepare for the next cleaning action. At the same time, the circulation of coolant and gas continues to maintain continuous cooling of the motor controller.

[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0100] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor controller with a liquid cooling structure, characterized in that: include: Motor controller body (1); A partition plate (2) is installed and fixed inside the motor controller body (1); A plurality of heat dissipation openings (3) are arranged on the side of the motor controller body (1); A cooling structure, arranged on the top surface of the mounting baffle (2); A driving structure, arranged inside the motor controller body (1); Two suction structures are both arranged on the driving structure, and when the driving structure is in operation, the two suction structures are operated accordingly; A coolant storage box (7) is fixed to the inner bottom surface of the motor controller body (1) and contains coolant.

2. The motor controller with liquid cooling structure according to claim 1, characterized in that: The cooling structure comprises: An outer tube (41) is fixed on the top surface of the mounting partition (2); An inner tube (42) is fixed inside the outer tube (41), a gap is defined between the inner tube (42) and the outer tube (41), liquid flows inside the inner tube (42), and gas flows in the gap between the inner tube (42) and the outer tube (41); A plurality of air outlet holes (43) are provided on one side of the outer tube (41).

3. The motor controller with liquid cooling structure according to claim 2, characterized in that: The outer tube (41) and the inner tube (42) are both serpentine tube structures, and the outer tube (41) is evenly distributed on the top surface of the mounting partition (2).

4. The motor controller with a liquid cooling structure according to claim 3, characterized in that: The driving structure comprises: A fixing frame (51) having a U-shaped structure and fixed on the inner bottom surface of the motor controller body (1); A motor (52) mounted on one end of the fixing frame (51); A reciprocating screw rod (53), one end of which is fixedly connected to the output shaft of the motor (52), and the other end of which is rotatably mounted on the side of the fixed frame (51); A first guide rod (54) fixed on the fixing frame (51); The movable seat (55) is threadably sleeved on the reciprocating screw rod (53) and slidably sleeved on the first guide rod (54).

5. The motor controller with liquid cooling structure according to claim 4, characterized in that: The suction structure comprises: A capsule (61), one end of which is connected to the side of the fixed frame (51), and the other end of which is connected to the side of the movable seat (55), and the capsule (61) is in the form of a long strip; Two installation tubes (62), both communicated with the capsule (61); Two one-way valves (63) are respectively installed on the two installation pipes (62).

6. The motor controller with liquid cooling structure according to claim 1, characterized in that: The motor controller body (1) is provided with a dust cleaning structure, a pushing structure, a pulling structure and a reset structure, and the dust cleaning structure comprises: A dust cleaning plate (81) is slidably arranged on the side of the motor controller body (1), and the moving stroke of the dust cleaning plate (81) covers a plurality of heat dissipation ports (3); Two guide openings (82) are respectively provided at the upper and lower ends of the dust cleaning plate (81); Two second guide rods (83) are both fixed on the side of the motor controller body (1) and pass through the two guide openings (82) respectively; A plurality of brushes (84) are arranged on the side of the dust cleaning plate (81) and are in contact with the side of the motor controller body (1); A first tension spring (85) has one end connected to the dust cleaning plate (81) and the other end connected to the motor controller body (1).

7. The motor controller with a liquid cooling structure according to claim 6, characterized in that: The propulsion structure comprises: An outer cylinder (91) is fixed on the side of the movable seat (55) and has an opening at one end; An inner rod (92) is movably inserted into the outer tube (91), and one end of the inner rod extends to the outside of the outer tube (91); A spring (93), one end of which is connected to the outer cylinder (91), and the other end of which is connected to the inner rod (92); The first control block (94) is detachably arranged at one end of the inner rod (92) located outside the outer cylinder (91), and an inclined surface is arranged on the first control block (94).

8. The motor controller with liquid cooling structure according to claim 7, characterized in that: The pulling structure comprises: Two third guide rods (101), both fixed to the inner bottom surface of the motor controller body (1), each of the third guide rods (101) being in a U-shaped structure; A sliding block (102) is slidably sleeved on the two third guide rods (101); A connecting wire (103), one end of which is connected to the sliding block (102), and the other end of which extends to the outside of the motor controller body (1) and is connected to the dust cleaning plate (81); A second tension spring (104), one end of which is connected to the sliding block (102), and the other end of which is connected to the inner bottom surface of the motor controller body (1); A sliding opening (105) is provided on the sliding block (102); A slide plate (106) is slidably disposed in the slide opening (105), with both ends extending to the outside of the slide opening (105); A second control block (107) is fixed to one end of the slide plate (106); an inclined surface is provided on the second control block (107), and the second control block (107) is arranged opposite to the first control block (94); The limiting sleeve (108) is fixedly sleeved on the slide plate (106), and the side surface of the limiting sleeve (108) and the side surface of the movable seat (55) are in contact with each other.

9. The motor controller with a liquid cooling structure according to claim 8, characterized in that: The reset structure comprises: A connecting rod (111), one end of which is fixedly connected to the inner surface of the motor controller body (1); The extrusion plate (112) is fixed to the other end of the connecting rod (111), and an inclined surface is provided on the extrusion plate (112), and the inclined surface of the extrusion plate (112) is arranged opposite to the other end of the slide plate (106).

10. A cooling method for a motor controller with a liquid circulation cooling structure, based on the motor controller with a liquid circulation cooling structure as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Start the motor (52) to start the operation. The motor (52) drives the reciprocating screw rod (53) to rotate. Under the guidance of the first guide rod (54), the rotation of the reciprocating screw rod (53) is converted into the reciprocating movement of the moving seat (55); Step 2: The two capsules (61) are operated alternately, and the coolant flows in the inner tube (42), cools the inner tube (42) and the outer tube (41), and then flows back to the coolant storage box (7) through the return pipe, completing a cycle, and the gas flows between the outer tube (41) and the inner tube (42), and is cooled by the coolant in the inner tube (42); Step 3: The cooled gas is ejected through a plurality of gas outlet holes (43) on the outer tube (41) and re-enters the interior of the motor controller body (1) to cool the interior space by air; Step 4: During the reciprocating movement of the movable seat (55), the first control block (94) cooperates with the second control block (107) to drive the sliding block (102) and the dust cleaning plate (81) to move back and forth, and the bristles (84) on the dust cleaning plate (81) brush away the dust attached to the heat dissipation port (3) during the movement, thereby keeping the heat dissipation port (3) unobstructed; Step 5. When the movable seat (55) moves to the other end and returns, the first control block (94) is separated from the second control block (107), and the sliding block (102) and the cleaning plate (81) are reset under the action of the spring (93) to prepare for the next cleaning action. At the same time, the circulation of the coolant and gas continues to maintain continuous cooling of the motor controller.

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