A heat dissipation structure for a high-voltage contactor

Abstract

This utility model relates to the field of contactor heat dissipation technology, and discloses a heat dissipation structure for a high-voltage contactor. It includes a fixed housing with a recessed accommodating space for inserting the high-voltage contactor. A heat dissipation fin is fixedly mounted on the fixed housing, with one end located within the accommodating space and the other end extending outside the fixed housing. A heat transfer structure is provided on the side of the heat dissipation fin near the high-voltage contactor, which avoids the high-voltage contactor when it is inserted into the accommodating space and, when the high-voltage contactor is confined within the accommodating space, adheres to the side wall of the high-voltage contactor to transfer heat from the high-voltage contactor to the heat dissipation fin. This heat dissipation structure reduces the heat on the high-voltage contactor and accumulated within the fixed housing by transferring heat from the high-voltage contactor to the heat dissipation fin, and then dissipating heat to the outside of the fixed housing via the heat dissipation fin, thereby achieving the purpose of heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of contactor heat dissipation technology, and in particular to a heat dissipation structure for high-voltage contactors. Background Technology

[0002] In existing BDU units, the contactor is simply positioned and installed by setting up a slot-shaped structure inside for the contactor to be inserted. However, when the car is running, the vibration may cause the contactor to shift position, making it difficult to guarantee reliability.

[0003] Chinese Patent Application No. 202323589526.1 discloses a high-voltage contactor mounting structure, including a contactor body, a fixing sleeve, and a fixing clip. The upper end of the fixing sleeve is open, and an accommodating space is formed inside the fixing sleeve. The lower part of the contactor body extends into the accommodating space. Several positioning protrusions are provided on the circumferential inner wall of the accommodating space. Each positioning protrusion contacts the outer wall of the lower part of the contactor body. The fixing clip is located at the upper end of the contactor body, and an elastic protrusion is provided at the lower end of the fixing clip. The elastic protrusion abuts against the upper end of the contactor body.

[0004] This high-voltage contactor mounting structure restricts the lateral movement of the high-voltage contactor through positioning protrusions and restricts its longitudinal movement through fixing clips and elastic protrusions, thereby limiting the positional deviation of the high-voltage contactor. However, high-voltage contactors are prone to generating high temperatures during use. If this high temperature accumulates inside the fixing housing and cannot dissipate in time, it can cause damage to the high-voltage contactor. Utility Model Content

[0005] This invention addresses the shortcoming of existing high-voltage contactors where high temperatures accumulate inside the fixed housing and cannot dissipate in time, causing damage to the contactors. It provides a heat dissipation structure for high-voltage contactors.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] A heat dissipation structure for a high-voltage contactor includes a fixed sleeve with a recessed accommodating space for inserting the high-voltage contactor. A heat dissipation fin is fixedly disposed on the fixed sleeve, with one end located inside the accommodating space and the other end extending outside the fixed sleeve. A heat transfer structure is provided on the side of the heat dissipation fin near the high-voltage contactor, which avoids the high-voltage contactor when it is inserted into the accommodating space and fits against the side wall of the high-voltage contactor when the high-voltage contactor is limited within the accommodating space, transferring the heat on the high-voltage contactor to the heat dissipation fin.

[0008] Using the above scheme, the high-voltage contactor dissipates heat into the receiving space, and then the heat dissipation fins dissipate the heat from the receiving space to the outside of the fixed housing, reducing the heat accumulation inside the fixed housing. In addition, the heat transfer structure can avoid direct contact when the high-voltage contactor is inserted into the receiving space, ensuring smooth insertion. When the high-voltage contactor is confined within the receiving space, it fits against the side wall of the high-voltage contactor, directly transferring heat from the contactor to the heat dissipation fins. Compared to using air to transfer heat, this further improves the heat dissipation performance of the high-voltage contactor.

[0009] Preferably, the heat transfer structure includes a telescopic groove recessed on the side of the heat dissipation fins near the high-voltage contactor, and a heat transfer block elastically guided and telescopically disposed within the telescopic groove. After being pressed by the high-voltage contactor, the block can elastically retract and abut against the side wall of the high-voltage contactor. The end of the heat transfer block protruding from the telescopic groove is arranged in an outwardly convex arc shape.

[0010] Using the above scheme, the high-voltage contactor is inserted into the receiving space and engages with the convex arc surface of the heat transfer block through compression and sliding. This causes the heat transfer block to elastically retract and avoid contact with the contactor. Furthermore, when the high-voltage contactor is confined within the receiving space, the heat transfer block elastically abuts against the side wall of the high-voltage contactor, and simultaneously adheres to the heat dissipation fins. Heat from the high-voltage contactor is directly transferred to the heat dissipation fins via the heat transfer block. In addition, the heat transfer block elastically abutting against the side wall of the high-voltage contactor increases the clamping and limiting capability of the high-voltage contactor, further enhancing the stability of the high-voltage contactor installed within the fixed housing.

[0011] Preferably, a thermally conductive spring is provided between the expansion groove and the heat transfer block along the expansion direction of the heat transfer block, with both ends fixedly connected to both.

[0012] Using the above scheme, the thermally conductive spring can achieve elastic expansion and contraction of the heat transfer block, and at the same time, transfer the heat on the heat transfer block to the heat dissipation fins.

[0013] Preferably, the fixed housing is equipped with an alarm structure that triggers an alarm when the temperature on the heat dissipation fins rises to a level equal to or greater than a preset temperature, as well as an auxiliary cooling structure that reduces the temperature of the high-voltage contactor.

[0014] Using the above solution, when the temperature on the heat dissipation fins rises to the level of or above the preset temperature, the alarm structure will alert the user. At the same time, the auxiliary cooling structure will quickly reduce the temperature on the high-voltage contactor, preventing the high-voltage contactor from continuing to heat up and reducing the damage to the high-voltage contactor caused by high temperature.

[0015] Preferably, the auxiliary cooling structure includes a liquid storage tank for storing coolant fixedly installed above the fixed casing, a liquid storage chamber formed hollow inside the fixed casing for the heat dissipation fins to pass through in a sealed manner, and a liquid passage pipe that is sealed and connected to the liquid storage tank and the liquid storage chamber at both ends respectively. Inside the liquid storage chamber, a control structure is provided on the heat dissipation fins to seal and block the liquid passage pipe when the temperature of the heat dissipation fins is lower than a preset temperature and to expose the liquid passage pipe when the temperature of the heat dissipation fins is equal to or greater than the preset temperature.

[0016] Using the above scheme, when the temperature on the heat dissipation fins is lower than the preset temperature, the control structure seals and blocks the liquid passage pipe; when the temperature on the heat dissipation fins rises to equal to or greater than the preset temperature, the control structure switches to expose the liquid passage pipe. Under the action of gravity, the coolant in the liquid storage tank falls into the liquid storage chamber through the liquid pipe, so that the heat dissipation fins in the liquid storage chamber are immersed in the coolant and cool down quickly. This allows the heat on the high-voltage contactor to be quickly transferred to the heat dissipation fins, accelerating the heat dissipation of the high-voltage contactor.

[0017] Preferably, the control structure includes a fixed block fixed to the side wall of the heat dissipation fin, a block that guides the movement of the fixed block, and a memory spring disposed between the heat dissipation fin and the block, which drives the block to seal the liquid passage when it extends or to expose the block when it contracts. The extension and contraction of the memory spring are controlled by the rise and fall of the temperature on the heat dissipation fin.

[0018] Using the above scheme, when the temperature on the heat dissipation fins is lower than the preset temperature, the memory spring extends to move the block to seal and block the liquid passage; when the temperature on the heat dissipation fins rises to equal to or greater than the preset temperature, the memory spring contracts to move the block to expose the liquid passage.

[0019] Preferably, the upper end face of the liquid storage tank is provided with a one-way gas supply valve for allowing external gas to enter the liquid storage tank, and the upper end face of the fixed casing is provided with a one-way exhaust valve for allowing the air in the liquid storage chamber to be discharged to the outside.

[0020] By adopting the above scheme, a one-way air supply valve and a one-way air exhaust valve are installed to ensure the air pressure balance between the liquid storage tank, the liquid transfer pipe and the liquid storage chamber, so as to ensure that the coolant can fall smoothly.

[0021] This utility model, by adopting the above technical solution, has significant technical effects: when the temperature on the heat dissipation fins is lower than the preset temperature, the heat on the high-voltage contactor is transferred to the heat dissipation fins through the heat transfer block, and the heat dissipation fins dissipate the heat to the outside of the fixed housing, preventing heat from accumulating inside the fixed housing; when the temperature on the heat dissipation fins is equal to or greater than the preset temperature, the alarm device alarms and the memory spring contracts, driving the block to move to expose the liquid pipe, and the coolant in the liquid storage tank falls into the liquid storage chamber, so that the heat dissipation fins in the liquid storage chamber are immersed in the coolant and cool down quickly, accelerating the heat dissipation of the high-voltage contactor and reducing the damage of high temperature to the high-voltage contactor. Attached Figure Description

[0022] Figure 1 This is a top view of a heat dissipation structure for a high-voltage contactor in one embodiment;

[0023] Figure 2 yes Figure 1 Sectional view at point AA;

[0024] Figure 3 yes Figure 2 Enlarged view of point B in the image;

[0025] Figure 4 yes Figure 3 Enlarged view of point C in the image;

[0026] Figure 5 This is a breakdown of a heat dissipation structure for a high-voltage contactor in one embodiment. Figure 1 ;

[0027] Figure 6 yes Figure 5 Enlarged view of point D in the image;

[0028] Figure 7 This is a breakdown of a heat dissipation structure for a high-voltage contactor in one embodiment. Figure 2 ;

[0029] Figure 8 yes Figure 7 Enlarged view of point E in the image;

[0030] Figure 9 yes Figure 8 Enlarged view of point F in the image;

[0031] Figure 10 This is a partially enlarged view of a heat dissipation structure for a high-voltage contactor in one embodiment, showing the block moving to expose the liquid passage pipe.

[0032] The parts referred to by the numbers in the above attached diagrams are as follows: 1. High-voltage contactor; 2. Fixed housing; 3. Accommodation space; 4. Heat dissipation fins; 5. Expansion groove; 6. Heat transfer block; 7. Thermally conductive spring; 8. Liquid storage tank; 9. Liquid storage chamber; 10. Liquid passage pipe; 11. Fixed block; 12. Block; 13. Memory spring; 14. One-way air supply valve; 15. One-way exhaust valve; 16. Temperature sensor. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0034] Example

[0035] A heat dissipation structure for a high-voltage contactor, as shown in the reference. Figures 1 to 10 It includes a fixed housing 2, and the fixed housing 2 has a recessed accommodating space 3 for inserting the high-voltage contactor 1.

[0036] A heat dissipation fin 4 is fixedly mounted on the fixed housing 2. One end of the heat dissipation fin 4 is located within the accommodating space 3, and the other end protrudes outside the fixed housing 2. A telescopic groove 5 is recessed on the side of the heat dissipation fin 4 near the high-voltage contactor 1. A heat transfer block 6 is partially telescopically mounted within the telescopic groove 5. A thermally conductive spring 7 is mounted between the telescopic groove 5 and the heat transfer block 6 along the telescopic direction of the heat transfer block 6, with both ends fixedly connected to the two. When the thermally conductive spring 7 is in its initial state, the heat transfer block 6 partially protrudes from the telescopic groove 5, and the outer wall of the heat transfer block 6 within the telescopic groove 5 is in contact with the inner wall of the telescopic groove 5. The end of the heat transfer block 6 protruding from the telescopic groove 5 is arranged in an outwardly convex arc shape. Several heat dissipation fins 4 are provided on the fixed housing 2. Several sets of telescopic grooves 5, thermally conductive springs 7, and heat transfer blocks 6 are spaced apart on each heat dissipation fin 4 along the insertion direction of the high-voltage contactor 1. In this embodiment, two heat dissipation fins 4 are symmetrically arranged, and 13 sets of telescopic grooves 5, thermally conductive springs 7, and heat transfer blocks 6 are spaced apart on each heat dissipation fin 4.

[0037] A temperature sensor 16 for monitoring the temperature of the heat dissipation fins 4 is fixedly mounted on the fixed housing 2. The housing also includes a control module and an alarm. The alarm and temperature sensor 16 are electrically connected to the control module. When the temperature monitored by the temperature sensor 16 is equal to or greater than a preset temperature, a signal is transmitted to the control module, which then controls the alarm to sound. The temperature sensor 16, the alarm, the control module, and the signal connections and control methods between them are all existing technologies. Except for a simplified illustration of the temperature sensor 16, the other components are not shown in the figure and will not be described in detail here.

[0038] A coolant reservoir 8 is fixedly mounted on top of the fixed housing 2. A one-way venting valve 14 is installed on the upper surface of the reservoir 8 to allow external gas to enter. The fixed housing 2 has a hollow interior forming a coolant storage chamber 9. The end of the heat dissipation fin 4, away from the accommodating space 3, passes through the coolant storage chamber 9 and is located outside the fixed housing 2. A one-way venting valve 15 is installed on the upper surface of the fixed housing 2 to allow gas from the coolant storage chamber 9 to escape to the outside. A liquid-passing pipe 10 is installed between the coolant reservoir 8 and the fixed housing 2, with both ends sealingly connected to the interior of the coolant reservoir 8 and the interior of the coolant storage chamber 9, respectively. A fixing block 11 is fixed to the side wall of the heat dissipation fin 4. A blocking block 12 is guided to move on the fixing block 11. A memory spring 13 is provided between the blocking block 12 and the heat dissipation fin 4, with both ends fixedly connected to both. When the temperature of the heat dissipation fin 4 is lower than the preset temperature, the memory spring 13 extends, driving the blocking block 12 to move and seal the liquid passage 10. When the temperature of the heat dissipation fin 4 is equal to or higher than the preset temperature, the memory spring 13 contracts, driving the blocking block 12 to protrude from the liquid passage 10. The memory spring 13 is made of a two-way memory alloy. The preset temperature is the same as the abnormal temperature of the memory spring 13. In practical applications, a suitable memory spring 13 can be selected according to the set preset temperature.

[0039] When the high-voltage contactor 1 is inserted into the receiving space 3, the heat transfer block 6 is compressed and elastically retracts. After the high-voltage contactor 1 is limited inside the fixed housing 2, it abuts against the side wall of the high-voltage contactor 1. When the temperature on the heat dissipation fin 4 is lower than the preset temperature, the heat on the high-voltage contactor 1 is transferred to the heat dissipation fin 4 through the heat transfer block 6, and the heat dissipation fin 4 dissipates the heat to the outside of the fixed housing 2, preventing heat from accumulating inside the fixed housing 2. When the temperature on the heat dissipation fin 4 is equal to or greater than the preset temperature, the alarm sounds and the memory spring 13 contracts, driving the block 12 to move to expose the liquid pipe 10. The coolant in the liquid storage tank 8 falls into the liquid storage chamber 9, so that the heat dissipation fin 4 in the liquid storage chamber 9 is immersed in the coolant and cools down quickly, accelerating the heat dissipation of the high-voltage contactor 1 and reducing the damage of high temperature to the high-voltage contactor 1.

[0040] After the alarm sounds, the user disconnects the power. During subsequent maintenance and repair, the liquid storage tank 8 can be replenished and the liquid storage chamber 9 can be drained. The replenishment of the liquid storage tank 8 and the draining of the liquid storage chamber 9 are existing technologies and are not shown in the figure, so they will not be described in detail here.

[0041] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heat dissipation structure for a high-voltage contactor, comprising a fixed casing (2) concavely provided with a containing space (3) for inserting a high-voltage contactor (1), characterized in that: A heat dissipation fin (4) is fixedly installed on the fixed housing (2), with one end located inside the accommodating space (3) and the other end extending out of the fixed housing (2). The side of the heat dissipation fin (4) near the high-voltage contactor (1) is provided with a heat transfer structure that avoids the high-voltage contactor (1) when it is inserted into the accommodating space (3) and fits against the side wall of the high-voltage contactor (1) when the high-voltage contactor (1) is limited in the accommodating space (3) to transfer the heat on the high-voltage contactor (1) to the heat dissipation fin (4).

2. The heat dissipation structure for a high-voltage contactor according to claim 1, characterized by: The heat transfer structure includes a telescopic groove (5) recessed on the side of the heat dissipation fin (4) near the high-voltage contactor (1) and a heat transfer block (6) elastically guided and telescopically arranged in the telescopic groove (5), which can elastically retract and abut against the side wall of the high-voltage contactor (1) after being pressed by the high-voltage contactor (1). The end of the heat transfer block (6) protruding from the telescopic groove (5) is arranged in an outward arc shape.

3. The heat sink structure for a high voltage contactor according to claim 2, wherein: A thermally conductive spring (7) is provided between the expansion groove (5) and the heat transfer block (6) along the expansion direction of the heat transfer block (6), with both ends fixedly connected to the two respectively.

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