Heat dissipation device, electrical control box, air conditioner and its control method

Abstract

This application relates to a heat dissipation device, an electrical control box, an air conditioner, and a control method thereof. The heat dissipation device is disposed on the electrical control box and includes: a liquid cooling plate, including a first side and a second side disposed opposite to each other, the first side of the liquid cooling plate contacting the heat-generating area of ​​the electrical control box, and the liquid cooling plate having an inlet and an outlet; a heat dissipation assembly, including heat dissipation fins, the heat dissipation fins being movably disposed on the second side of the liquid cooling plate, such that the heat dissipation fins have a first state of being separated from the liquid cooling plate and a second state of being attached to the liquid cooling plate; a temperature detection device configured to detect the temperature of the electrical control box; a flow rate control device configured to detect the flow rate of the inlet or outlet; and a controller, the temperature detection device and the flow rate control device being electrically connected to the controller. This heat dissipation device can improve the overall heat dissipation efficiency of the heat dissipation device, avoid heat accumulation inside the electrical control box due to liquid cooling plate failure, and ensure the normal operation of the electrical control box.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology, and in particular to a heat dissipation device, an electrical control box, an air conditioner, and a control method thereof. Background Technology

[0002] As the integration level of electronic modules continues to increase, the requirements for corresponding cooling and heat dissipation technologies are becoming increasingly stringent. The heat dissipation design of equipment is constantly being updated and developed amidst various difficulties and challenges. When electronic components generate heat exceeding their capacity during operation, a large amount of heat accumulates on the components, causing the entire electronic device to operate in a high-temperature environment. This significantly affects the performance of the electronic components and can even lead to overload damage. Therefore, in the design of electronic equipment (such as electrical control boxes), how to quickly reduce device temperature and enhance heat dissipation design has become increasingly important.

[0003] In related technologies, liquid cooling plate heat dissipation is widely used due to its advantages such as strong heat dissipation capacity, high reliability, long service life, and low consumption, which well meet design requirements. However, the internal channels of the liquid cooling plate will inevitably become blocked, increasing the flow resistance of the internal circulation, reducing the heat dissipation efficiency of the liquid cooling plate, and even causing the liquid cooling plate to fail. This, in turn, affects the performance of electronic components in the electrical control box and reduces the operational reliability of the air conditioner. Summary of the Invention

[0004] This application provides a heat dissipation device, an electrical control box, an air conditioner, and a control method thereof to solve the technical problem that the internal channels of existing liquid cooling plates inevitably become blocked, increasing the flow resistance of the internal circulation of the liquid cooling plate, reducing the heat dissipation efficiency of the liquid cooling plate, or even causing the liquid cooling plate to fail, thereby affecting the performance of the electronic components of the electrical control box and reducing the operational reliability of the air conditioner.

[0005] In a first aspect, this application provides a heat dissipation device, disposed on an electrical control box, the heat dissipation device comprising:

[0006] The liquid cooling plate includes a first side and a second side arranged opposite to each other. The first side of the liquid cooling plate is in contact with the heat-generating area of ​​the electrical control box. The liquid cooling plate is provided with a water inlet and a water outlet.

[0007] A heat dissipation assembly includes heat dissipation fins movably disposed on a second side of a liquid cooling plate, such that the heat dissipation fins have a first state of being separated from the liquid cooling plate and a second state of being in contact with the liquid cooling plate; and

[0008] The controller is configured to control the heat dissipation device to enter an emergency working mode when the flow rate at the inlet and / or outlet is less than a flow rate threshold; if the temperature of the electrical control box is greater than a first temperature threshold, the controller controls the heat dissipation fins to move closer to the liquid cooling plate until the heat dissipation fins are in a second state so that the heat of the electrical control box can be exchanged with the surrounding air through the liquid cooling plate and heat dissipation fins.

[0009] In one possible implementation, the heat dissipation component includes a fan, which is disposed on the side of the heat dissipation fins away from the liquid cooling plate;

[0010] The fan and controller are electrically connected. The controller is configured to, when the flow rate at the inlet or outlet is less than a flow rate threshold, if the temperature of the electrical control box is greater than or equal to a second temperature threshold, control the heat dissipation fins to move closer to the liquid cooling plate until the heat dissipation fins are in a second state, and control the fan to be turned on. The second temperature threshold is greater than the first temperature threshold.

[0011] In one possible implementation, the liquid cooling plate has a cavity inside, which is connected to the inlet and outlet. Multiple fins are arranged inside the liquid cooling plate, extending from the second side of the liquid cooling plate to the first side of the liquid cooling plate, and a flow channel is formed between two adjacent fins.

[0012] In one possible implementation, multiple fins are arranged in an array, with adjacent rows of fins staggered.

[0013] In one possible implementation, a partition is provided inside the liquid cooling plate, extending from the second side of the liquid cooling plate to the first side of the liquid cooling plate, and a channel communicating with the flow channel is provided between the partition and the first side of the liquid cooling plate.

[0014] In one possible implementation, the heat dissipation component includes a drive element and a transmission mechanism. The drive element and the controller are electrically connected. The drive element is connected to the transmission mechanism. The power output end of the transmission mechanism is connected to the heat dissipation fins to drive the heat dissipation fins to move relative to the liquid cooling plate.

[0015] In one possible implementation, the heat dissipation component includes a first magnetic suction part, a second magnetic suction part, and a guide rail. The first magnetic suction part is disposed on the liquid cooling plate, and the second magnetic suction part is disposed on the heat dissipation fins. The first magnetic suction part and the second magnetic suction part are electrically connected to the controller. When the first magnetic suction part and the second magnetic suction part are energized, they have a magnetic force that attracts or repels each other. The two ends of the guide rail are slidably connected to the liquid cooling plate and the heat dissipation fins, respectively.

[0016] In one possible implementation, an alarm device is included, which is electrically connected to a controller. The controller is configured to control the alarm device to issue an alarm when the flow velocity at the inlet or outlet is less than or equal to a flow velocity threshold.

[0017] Secondly, this application provides an electrical control box, including the heat dissipation device as described above.

[0018] Thirdly, this application provides an air conditioner, including the electrical control box as described above.

[0019] Fourthly, this application provides a control method for an air conditioner, applied to the air conditioner as described above, the control method comprising:

[0020] Obtain the flow rate at the inlet and / or outlet of the liquid cooling plate, and the temperature of the electrical control box;

[0021] When the flow rate at the inlet and / or outlet is less than or equal to the flow rate threshold, the heat dissipation device is controlled to enter the emergency working mode.

[0022] If the temperature of the electrical control box is greater than or equal to the first temperature threshold, the heat dissipation fins are controlled to move closer to the liquid cooling plate until the heat dissipation fins are in the second state, so that the heat of the electrical control box can be exchanged with the surrounding air through the liquid cooling plate and heat dissipation fins.

[0023] In one possible implementation, the air conditioner's heat dissipation component includes a fan, which is positioned on the side of the heat dissipation fins away from the liquid cooling plate. Emergency operating modes include:

[0024] If the temperature of the electrical control box is greater than or equal to the second temperature threshold, the heat sink fins are controlled to be in the second state, and the fan is controlled to be in the on state, wherein the second temperature threshold is greater than the first temperature threshold.

[0025] In one possible implementation, the emergency response mode includes:

[0026] If the temperature of the electrical control box is lower than the first temperature threshold, the heat dissipation fins are controlled to move away from the liquid cooling plate until the heat dissipation fins are in the first state, and the fan is controlled to be in the off state.

[0027] One possible implementation includes:

[0028] When the flow rate at both the inlet and outlet exceeds the flow rate threshold, the heat dissipation device is controlled to enter normal operating mode.

[0029] If the temperature of the control box is less than or equal to the first temperature threshold, the heat dissipation fins are controlled to move away from the liquid cooling plate until the heat dissipation fins are in the first state, and the flow rate of the inlet or outlet is controlled based on the temperature of the control box.

[0030] In one possible implementation, the normal operating modes include:

[0031] If the temperature of the electrical control box is greater than the first temperature threshold, the heat dissipation fins are controlled to move closer to the liquid cooling plate until the heat dissipation fins are in the second state.

[0032] In one possible implementation, the heat dissipation component of the air conditioner includes a fan, which is positioned on the side of the heat dissipation fins away from the liquid cooling plate. The normal operating mode includes:

[0033] If the temperature of the electrical control box is greater than the third temperature threshold, the heat sink fins are controlled to be in the second state, and the fan is controlled to be in the on state, wherein the third temperature threshold is greater than the first temperature threshold.

[0034] The technical solutions provided in this application have the following advantages compared with the prior art:

[0035] The heat dissipation device, electrical control box, air conditioner, and control method provided in this application embodiment involve a liquid cooling plate whose first side contacts the heat-generating area of ​​the electrical control box, causing heat exchange between the liquid cooling plate and the heat-generating area of ​​the electrical control box, thus removing heat from the electrical control box. The liquid cooling plate is equipped with an inlet and an outlet. When the liquid cooling plate is functioning correctly, the heat dissipation device is in normal operating mode, with a cooling medium flowing inside the liquid cooling plate. The low-temperature cooling medium enters the liquid cooling plate through the inlet, exchanges heat with the heat-generating area of ​​the electrical control box, and then flows out through the outlet. This allows some of the heat from the electrical control box to be carried away by the cooling medium, while the remaining heat is carried away through heat exchange between the liquid cooling plate and the surrounding air, thereby rapidly reducing the temperature of the electrical control box. If the flow rate at the inlet and / or outlet is less than a flow rate threshold, it indicates a blockage at the inlet or outlet of the liquid cooling plate, causing a malfunction. The heat dissipation capacity of the liquid cooling plate decreases or even fails. In this case, the heat dissipation device is controlled to enter an emergency operating mode. If the temperature of the control box exceeds the first temperature threshold, it indicates that the control box is generating significant heat, which may affect the normal operation of electronic components. In this case, the heat sink fins are moved closer to the liquid cooling plate until they are in the second state. Because the heat sink fins are in contact with the second side of the liquid cooling plate, the heat from the control box is transferred to the second side of the liquid cooling plate via thermal conduction, and then from the second side of the liquid cooling plate to the heat sink fins. The liquid cooling plate and heat sink fins exchange heat with the surrounding air, utilizing the principles of thermal conduction and natural convection for heat dissipation. The heat sink fins increase the heat dissipation area, improving the overall heat dissipation efficiency of the cooling device. This prevents heat buildup inside the control box due to liquid cooling plate failure, ensuring the normal operation of the electronic components inside the control box and thus guaranteeing the long-term reliability of the air conditioner. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0039] Figure 1 This is a schematic diagram of a heat dissipation device provided in an embodiment of this application, wherein the heat dissipation fins are in a first state;

[0040] Figure 2 for Figure 1 The diagram shows the working state of the heat dissipation device, where the heat dissipation fins are in the second state;

[0041] Figure 3 for Figure 1 A cross-sectional view of the liquid cooling plate of the heat dissipation device is shown;

[0042] Figure 4 A flowchart illustrating a control method for an air conditioner provided in one embodiment of this application;

[0043] Figure 5 A flowchart of a control method for an air conditioner provided in another embodiment of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Heat dissipation device; 11. Liquid cooling plate; 111. First side; 112. Second side; 113. Water inlet; 114. Water outlet; 115. Fins; 116. Flow channel; 117. Baffle; 12. Heat dissipation assembly; 121. Heat dissipation fins; 122. Fan; 123. Drive component; 124. Transmission bracket. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0048] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0049] In related technologies, liquid cooling plate heat dissipation is widely used in electrical control box heat dissipation due to its advantages such as strong heat dissipation capacity, high reliability, long service life, and low consumption, which well meet design requirements. Liquid cooling plates have high overall strength and are easy to process. When installed and fixed in the electrical control box, the liquid cooling plate serves both a supporting and heat dissipation function. However, during operation, the liquid cooling medium contains a large number of impurity ions, which easily react with cations such as calcium, magnesium, and iron to form scale under high-temperature conditions. Microorganisms and bacteria can also form soft scale with chemical pollutants and dust. This scale can clog the internal channels of the liquid cooling plate, increase the flow resistance of the internal circulation, reduce the heat dissipation efficiency, and even cause the liquid cooling plate to fail. This, in turn, affects the performance of electronic components in the electrical control box and reduces the operational reliability of the air conditioner.

[0050] To address the technical problem that the internal channels of existing liquid cooling plates inevitably become blocked, leading to a decrease or even failure of the liquid cooling plate's heat dissipation capacity, affecting the performance of electronic components in the electrical control box, and thus impacting the operational reliability of the air conditioner, this application provides a heat dissipation device, an electrical control box, an air conditioner, and a control method thereof. This method can improve the overall heat dissipation efficiency of the heat dissipation device, prevent heat accumulation inside the electrical control box due to liquid cooling plate failure, ensure the normal operation of electronic components inside the electrical control box, and thus guarantee the long-term operational reliability of the air conditioner.

[0051] like Figures 1 to 3 As shown, this application provides a heat dissipation device 1, which is installed on an electrical control box. The heat dissipation device 1 includes a liquid cooling plate 11, a heat dissipation assembly 12, and a controller. The liquid cooling plate 11 includes a first side 111 and a second side 112 disposed opposite to each other. The first side 111 of the liquid cooling plate 11 is in contact with the heat-generating area of ​​the electrical control box. The liquid cooling plate 11 is provided with an inlet 113 and an outlet 114. The heat dissipation assembly 12 includes heat dissipation fins 121, which are movably disposed on the second side 112 of the liquid cooling plate 11, so that the heat dissipation fins 121... 1 has a first state separated from the liquid cooling plate 11 and a second state attached to the liquid cooling plate 11; the controller is configured to control the heat dissipation device 1 to enter an emergency working mode when the flow rate of the inlet 113 and / or outlet 114 is less than a flow rate threshold; if the temperature of the electrical control box is greater than a first temperature threshold, the controller controls the heat dissipation fins 121 to move closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in the second state, so that the heat of the electrical control box can be exchanged with the surrounding air through the liquid cooling plate 11 and the heat dissipation fins 121.

[0052] It should be noted that the first side 111 of the liquid cooling plate 11 is in contact with the heat-generating area of ​​the electrical control box. Specifically, the electrical control box is provided with a mounting plate, and electronic components are provided on one side of the mounting plate. Therefore, the first side 111 of the liquid cooling plate 11 can be in contact with the side of the mounting plate away from the electronic components; or, the mounting plate is provided on the side wall of the electrical control box, so that the first side 111 of the liquid cooling plate 11 can be in contact with the corresponding side wall of the electrical control box, so that heat exchange occurs between the liquid cooling plate 11 and the heat-generating area of ​​the electrical control box, and the heat of the electrical control box is carried away. The liquid cooling plate 11 is equipped with an inlet 113 and an outlet 114. When the liquid cooling plate 11 is not malfunctioning, the heat dissipation device 1 is in normal working mode. Cooling medium flows inside the liquid cooling plate 11. The low-temperature cooling medium enters the liquid cooling plate 11 through the inlet 113. After heat exchange between the cooling medium of the liquid cooling plate 11 and the heat-generating area of ​​the electrical control box, it flows out through the outlet 114. This allows some of the heat from the electrical control box to be carried away by the cooling medium, while the remaining heat is carried away through heat exchange between the liquid cooling plate 11 and the surrounding air, thereby rapidly reducing the temperature of the electrical control box. Of course, the inlet 113 of the liquid cooling plate 11 can be connected to an external water tank through a pipe, and the outlet 114 of the liquid cooling plate 11 can be connected to an external water pump. The water tank and the water pump are connected, and the water pump provides the power to drive the flow of the cooling medium, thereby realizing the circulation of the cooling medium.

[0053] It is understandable that if the flow rate at the inlet 113 is less than the flow rate threshold, or the flow rate at the outlet 114 is less than the flow rate threshold, or if the flow rates at both the inlet 113 and the outlet 114 are less than the flow rate threshold, it indicates that the inlet 113 or the outlet 114 of the liquid cooling plate 11 is blocked and malfunctions, the heat dissipation capacity of the liquid cooling plate 11 decreases or even fails, and at this time the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electrical control box exceeds the first temperature threshold Tm1, it indicates that the electrical control box is generating a significant amount of heat, which may affect the normal operation of electronic components. In this case, the heat dissipation fins 121 are moved closer to the liquid cooling plate 11 until they are in the second state. Since the heat dissipation fins 121 are in contact with the second side 112 of the liquid cooling plate 11, the heat from the electrical control box is transferred to the second side 112 of the liquid cooling plate 11 through thermal conduction, and then from the second side 112 of the liquid cooling plate 11 to the heat dissipation fins 121. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air, using the principles of thermal conduction and natural convection to dissipate heat. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, and prevent heat accumulation inside the electrical control box due to the failure of the liquid cooling plate 11. This ensures the normal operation of the electronic components inside the electrical control box and thus guarantees the long-term reliability of the air conditioner.

[0054] The heat dissipation device also includes a temperature detection device and a flow rate control device. The temperature detection device is configured to detect the temperature of the electrical control box. Specifically, the temperature of the electrical control box can be the local temperature of the heat-generating area of ​​the electrical control box, the internal temperature of the electrical control box, or the average temperature of multiple heat-generating areas of the electrical control box. The flow rate control device is configured to detect the flow rate of the inlet 113 and the outlet 114. The flow rate control device can use an existing flow rate controller, which can accurately measure and control the flow rate of the inlet 113 and the outlet 114. The temperature detection device and the flow rate control device are electrically connected to the controller.

[0055] Optionally, the liquid cooling plate 11 is made of a material with good thermal conductivity, thereby improving the heat exchange efficiency between the liquid cooling plate 11 and the surrounding air. The heat dissipation fins 121 can also be made of a material with good thermal conductivity, thereby improving the heat exchange efficiency between the heat dissipation fins 121 and the surrounding air, and thus improving the emergency heat dissipation performance of the heat dissipation device 1.

[0056] Multiple heat dissipation protrusions are provided on the side of the heat dissipation fin 121 facing away from the liquid cooling plate 11. These protrusions can be needle-shaped, columnar, or plate-shaped, etc., and this application does not impose specific limitations on their shape. The multiple heat dissipation protrusions are arranged in an array; however, they can also be arranged irregularly, and this application does not impose specific limitations on their arrangement. The multiple heat dissipation protrusions increase the contact area between the heat dissipation fin 121 and the surrounding air, thereby improving heat exchange efficiency.

[0057] In some embodiments, such as Figure 1 As shown, the heat dissipation assembly 12 includes a fan 122, which is disposed on the side of the heat dissipation fins 121 away from the liquid cooling plate 11. The fan 122 is electrically connected to a controller, which is configured to, when the flow rate at the inlet 113 and / or the outlet 114 is less than a flow rate threshold, if the temperature of the control box is greater than or equal to a second temperature threshold Tm2, ​​control the heat dissipation fins 121 to move closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in a second state, and control the fan 122 to be turned on. The second temperature threshold Tm2 is greater than the first temperature threshold Tm1.

[0058] Understandably, if the temperature of the control box is greater than or equal to the second temperature threshold, it indicates that the electronic components in the control box are overheating severely, and the natural convection between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air is insufficient to meet the heat dissipation requirements of the control box. At this point, the heat dissipation fins 121 are moved closer to the liquid cooling plate 11 until they are in the second state, and the fan 122 is turned on. Since the heat dissipation fins 121 are in contact with the second side 112 of the liquid cooling plate 11, the heat from the heat-generating components inside the control box is transferred to the heat dissipation fins 121 via the liquid cooling plate 11. The fan 122 accelerates the airflow around the heat dissipation fins 121, creating forced convection between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air. This allows for faster heat dissipation from the control box, improving heat dissipation efficiency and reducing the temperature of the control box. This prevents heat buildup inside the control box from affecting the performance of electronic components or even causing overload damage, further ensuring the long-term reliability of the air conditioner.

[0059] In some embodiments, such as Figure 3 As shown, the liquid cooling plate 11 has a cavity inside, which is connected to the water inlet 113 and the water outlet 114. Multiple fins 115 are provided inside the liquid cooling plate 11. The fins 115 extend from the second side 112 of the liquid cooling plate 11 to the first side 111 of the liquid cooling plate 11, and a flow channel 116 is formed between two adjacent fins 115. The low-temperature cooling medium enters the cavity through the inlet 113 and flows out through the outlet 114. The cooling medium circulates within the flow channel 116. On one hand, heat exchange occurs between the low-temperature cooling medium and the electrical control box to form a high-temperature cooling medium. The high-temperature cooling medium also exchanges heat with a large number of fins 115. The large number of fins 115 increases the contact area between the liquid cooling plate 11 and the cooling medium. A portion of the heat from the high-temperature cooling medium is transferred to the second side 112 of the liquid cooling plate 11 via the fins 115, further improving the heat exchange efficiency of the liquid cooling plate 11. On the other hand, the large number of fins 115 can change the flow direction of the cooling medium in different flow channels 116 of the same row of fins 115, promoting the shuttle flow of the cooling medium in different flow channels 116, reducing the fluid temperature difference at the same cross section of the same row of fins 115 of the liquid cooling plate 11, improving the heat exchange efficiency between the liquid cooling plate 11 and the electrical control box, and enhancing the heat dissipation performance of the liquid cooling plate 11. Even if the liquid cooling plate 11 fails due to blockage of the flow channel 116, the large number of fins 115 can further improve the heat transfer efficiency between the liquid cooling plate 11 and the heat dissipation fins 121, so that heat can be exchanged with the surrounding air through the heat dissipation fins 121, avoiding heat accumulation inside the electrical control box, ensuring the normal operation of electronic components in the electrical control box, and thus ensuring the long-term reliability of the air conditioner.

[0060] In some embodiments, multiple fins 115 are arranged in an array, with adjacent rows of fins 115 staggered. The large number of staggered fins 115 can change the flow direction of the cooling medium in different flow channels 116 of the same row of fins 115, promote the shuttle flow of the cooling medium in different flow channels 116, reduce the fluid temperature difference of the same cross section of the same row of fins 115 of the liquid cooling plate 11, and improve the heat exchange efficiency. Of course, the multiple fins 115 can also be arranged in other ways. For example, in the direction from the inlet 113 of the liquid cooling plate 11 to the outlet of the liquid cooling plate 11, the distance between two adjacent rows of fins 115 gradually decreases; or, in the direction from the inlet 113 of the liquid cooling plate 11 to the outlet of the liquid cooling plate 11, the distance between two adjacent rows of fins 115 gradually increases; or, the multiple fins 115 can also be arranged irregularly to promote the shuttle flow of the cooling working fluid in different flow channels 116, reduce the fluid temperature difference of the same cross section of the same row of fins 115 in the liquid cooling plate 11, and improve the heat exchange efficiency.

[0061] It should be noted that the fin 115 can be configured as needle-shaped, columnar, or plate-shaped, etc., and this application does not impose any restrictions on it.

[0062] In an optional embodiment, the fins 115 can be configured as needle-shaped, with the first end of the needle-shaped fins 115 connected to the second side 112 of the liquid cooling plate 11, and the second end of the needle-shaped fins 115 extending toward the first side 111 of the liquid cooling plate 11, with adjacent rows of needle-shaped fins 115 arranged in a staggered manner. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electrical control box to form a high-temperature cooling medium. The high-temperature cooling medium exchanges heat with a large number of needle-shaped fins 115. Part of the heat of the high-temperature cooling medium is transferred to the second side 112 of the liquid cooling plate 11 through the needle-shaped fins 115, further improving the heat exchange efficiency of the liquid cooling plate 11. On the other hand, the two adjacent rows of needle-shaped fins 115 are staggered. A large number of needle-shaped fins 115 can change the flow direction of the cooling medium in different flow channels 116 of the same row of fins 115, promote the shuttle flow of the cooling medium in different flow channels 116, reduce the fluid temperature difference of the same cross section of the same row of fins 115 of the liquid cooling plate 11, improve the heat exchange efficiency between the liquid cooling plate 11 and the electrical control box, and further improve the heat transfer efficiency between the liquid cooling plate 11 and the heat dissipation fins 121, thereby improving the overall heat dissipation performance of the heat dissipation device 1.

[0063] In an optional embodiment, the fins 115 can be configured as columnar, with the first end of the columnar fin 115 connected to the second side 112 of the liquid cooling plate 11, and the second end of the columnar fin 115 extending toward the first side 111 of the liquid cooling plate 11, and adjacent rows of columnar fins 115 being staggered. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electrical control box to form a high-temperature cooling medium. The high-temperature cooling medium exchanges heat with a large number of columnar fins 115. Part of the heat from the high-temperature cooling medium is transferred to the second side 112 of the liquid cooling plate 11 through the columnar fins 115, further improving the heat exchange efficiency of the liquid cooling plate 11. On the other hand, the two adjacent rows of columnar fins 115 are staggered. The large number of columnar fins 115 can change the flow direction of the cooling medium in different flow channels 116 of the same row of fins 115, promote the shuttle flow of the cooling medium in different flow channels 116, reduce the fluid temperature difference of the same cross section of the same row of fins 115 of the liquid cooling plate 11, improve the heat exchange efficiency between the liquid cooling plate 11 and the electrical control box, and further improve the heat transfer efficiency between the liquid cooling plate 11 and the heat dissipation fins 121, thereby improving the overall heat dissipation performance of the heat dissipation device 1.

[0064] In an optional embodiment, the fins 115 may be plate-shaped, with the plate-shaped fins 115 extending from the second side 112 of the liquid cooling plate 11 to the first side 111 of the liquid cooling plate 11, and adjacent rows of plate-shaped fins 115 being staggered. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electrical control box to form a high-temperature cooling medium. The high-temperature cooling medium exchanges heat with a large number of plate-shaped fins 115. Part of the heat from the high-temperature cooling medium is transferred to the second side 112 of the liquid cooling plate 11 through the plate-shaped fins 115, further improving the heat exchange efficiency of the liquid cooling plate 11. On the other hand, the two adjacent rows of plate-shaped fins 115 are staggered. A large number of plate-shaped fins 115 can change the flow direction of the cooling medium in different flow channels 116 of the same row of fins 115, promote the shuttle flow of the cooling medium in different flow channels 116, reduce the fluid temperature difference of the same cross section of the same row of fins 115 of the liquid cooling plate 11, improve the heat exchange efficiency between the liquid cooling plate 11 and the electrical control box, and further improve the heat transfer efficiency between the liquid cooling plate 11 and the heat dissipation fins 121, thereby improving the overall heat dissipation performance of the heat dissipation device 1.

[0065] In an optional embodiment, such as Figure 3As shown, a partition 117 is provided inside the liquid cooling plate 11. The partition 117 extends from the second side 112 of the liquid cooling plate 11 to the first side 111 of the liquid cooling plate 11, and a channel communicating with the flow channel 116 is provided between the partition 117 and the first side 111 of the liquid cooling plate 11. The partition 117 divides the internal cavity of the liquid cooling plate 11 into multiple heat exchange areas, which enhances the structural strength of the liquid cooling plate 11 and increases the contact area between the liquid cooling plate 11 and the cooling medium, thus promoting heat dissipation. The cooling medium flows from the flow channel 116 through the channel, exchanges heat fully with the electrical control box, and then flows out from the outlet 114. Multiple partitions 117 can be provided, and the multiple partitions 117 are arranged at intervals. In this embodiment, two partitions 117 are provided inside the liquid cooling plate 11.

[0066] Optionally, the fins 115 have a first height in the vertical direction, and the baffle 117 has a second height in the vertical direction. The first height is smaller than the second height, so that the cooling medium can pass smoothly through the channel and reduce the flow resistance of the cooling medium.

[0067] In some embodiments, the heat dissipation assembly 12 includes a drive member 123 and a transmission mechanism. The drive member 123 is electrically connected to a controller. The drive member 123 is connected to the transmission mechanism. The power output end of the transmission mechanism is connected to the heat dissipation fins 121 to drive the heat dissipation fins 121 to move relative to the liquid cooling plate 11.

[0068] In an optional embodiment, such as Figure 1 and Figure 2 As shown, the driving component 123 includes a hydraulic cylinder, and the transmission mechanism includes a transmission bracket 124. The transmission bracket 124 is disposed on the heat dissipation fins 121, and the hydraulic cylinder is fixedly mounted on the liquid cooling plate 11. The piston rod of the hydraulic cylinder is arranged vertically and is connected to the transmission bracket 124. The hydraulic cylinder drives the transmission bracket 124 to move, thereby causing the heat dissipation fins 121 to move vertically relative to the liquid cooling plate 11, thus realizing the switching of the heat dissipation fins 121 between the first state and the second state. Of course, the piston rod of the hydraulic cylinder can also be arranged vertically, thereby causing the heat dissipation fins 121 to move horizontally relative to the liquid cooling plate 11, which can also realize the switching of the heat dissipation fins 121 between the first state and the second state.

[0069] When the heat dissipation capacity of the liquid cooling plate 11 is insufficient to meet the heat dissipation requirements of the electrical control box, the controller controls the piston rod of the hydraulic cylinder to retract. The heat dissipation fins 121 move closer to the liquid cooling plate 11 under magnetic attraction until they are in a second state of contact with the second side 112 of the liquid cooling plate 11. This allows for heat dissipation through heat conduction between the liquid cooling plate 11 and the heat dissipation fins 121, as well as natural convection between the heat dissipation fins 121 and the surrounding air, thereby improving the overall heat dissipation capacity of the heat dissipation device 1. If the combined heat dissipation method of the liquid cooling plate 11 and the heat dissipation fins 121 is still insufficient to meet the heat dissipation requirements of the electrical control box, the fan 122 can be turned on. The fan 122 accelerates the airflow around the heat dissipation fins 121, further improving the overall heat dissipation capacity of the heat dissipation device 1 through heat conduction between the liquid cooling plate 11 and the heat dissipation fins 121, and forced convection between the heat dissipation fins 121 and the surrounding air.

[0070] In some embodiments, the heat dissipation assembly 12 includes a first magnetic attraction part, a second magnetic attraction part, and a guide rail. The first magnetic attraction part is disposed on the liquid cooling plate 11, and the second magnetic attraction part is disposed on the heat dissipation fins 121. The first and second magnetic attraction parts are electrically connected to the controller. When the first and second magnetic attraction parts are energized, they have a magnetic force that attracts or repels each other. The two ends of the guide rail are slidably connected to the liquid cooling plate 11 and the heat dissipation fins 121, respectively, to improve the stability of the movement of the heat dissipation fins 121. When the heat dissipation capacity of the liquid cooling plate 11 cannot meet the heat dissipation requirements of the electrical control box, the controller controls the first and second magnetic attraction parts to be energized so that they have a magnetic force that attracts each other. Under the action of the magnetic attraction force, the heat dissipation fins 121 move closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in a second state that is in contact with the second side 112 of the liquid cooling plate 11. Heat dissipation can be achieved by heat conduction between the liquid cooling plate 11 and the heat dissipation fins 121, as well as by natural convection between the heat dissipation fins 121 and the surrounding air, thereby improving the overall heat dissipation capacity of the heat dissipation device 1. When the combined heat dissipation method of liquid cooling plate 11 and heat dissipation fins 121 is still insufficient to meet the heat dissipation requirements of the electrical control box, the fan 122 can be turned on. The fan 122 accelerates the airflow around the heat dissipation fins 121, and heat dissipation is achieved by heat conduction between liquid cooling plate 11 and heat dissipation fins 121, as well as by forced convection between heat dissipation fins 121 and surrounding air, thereby further improving the overall heat dissipation capacity of the heat dissipation device 1.

[0071] In some embodiments, the heat dissipation device 1 includes an alarm device electrically connected to a controller. The controller is configured to activate the alarm device when the flow rate at the inlet 113 or outlet 114 is less than or equal to a flow rate threshold. The alarm device includes a display screen that displays the flow rate at the inlet 113 or outlet 114 when the flow rate is less than or equal to the flow rate threshold, and simultaneously issues a text or sound warning to alert the user to any malfunction of the liquid cooling plate 11 and to prompt them to check the flow channel 116 of the liquid cooling plate 11.

[0072] This application provides an electrical control box, including the heat dissipation device 1 as described above.

[0073] If the flow rate at the inlet 113 or outlet 114 is less than the flow rate threshold, it indicates that the inlet 113 or outlet 114 of the liquid cooling plate 11 is blocked and malfunctions, resulting in a decrease or even failure of the heat dissipation capacity of the liquid cooling plate 11. At this time, the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electrical control box is greater than the first temperature threshold, it indicates that the heat generation of the electrical control box is serious and may affect the normal operation of electronic components. In this case, the heat dissipation fins 121 are controlled to move closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in the second state. Since the heat dissipation fins 121 are in contact with the liquid cooling plate 11, the heat of the electrical control box is transferred to the liquid cooling plate 11 and the heat dissipation fins 121 through thermal conduction. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air, using the principles of thermal conduction and natural convection to dissipate heat. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, and prevent heat accumulation inside the electrical control box due to the failure of the liquid cooling plate 11, thus ensuring the normal operation of the electronic components inside the electrical control box.

[0074] This application provides an air conditioner, including the electrical control box as described above.

[0075] If the flow rate at the inlet 113 or outlet 114 is less than the flow rate threshold, it indicates that the inlet 113 or outlet 114 of the liquid cooling plate 11 is blocked and malfunctions, the heat dissipation capacity of the liquid cooling plate 11 decreases or even fails, and at this time the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electrical control box exceeds the first temperature threshold, it indicates that the electrical control box is generating a significant amount of heat, which may affect the normal operation of electronic components. In this case, the heat dissipation fins 121 are moved closer to the liquid cooling plate 11 until they are in the second state. Since the heat dissipation fins 121 are in contact with the liquid cooling plate 11, the heat of the electrical control box is transferred to the liquid cooling plate 11 and the heat dissipation fins 121 through thermal conduction. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air, using the principles of thermal conduction and natural convection to dissipate heat. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, and prevent heat accumulation inside the electrical control box due to the failure of the liquid cooling plate 11. This ensures the normal operation of the electronic components inside the electrical control box and thus guarantees the long-term reliability of the air conditioner.

[0076] like Figure 4 As shown, this application provides a control method for an air conditioner, applied to the air conditioner described above. The control method includes the following steps:

[0077] S11. Obtain the flow rate of the inlet 113 and / or outlet 114 of the liquid cooling plate 11, and the temperature of the electrical control box.

[0078] S12a. When the flow velocity at the inlet 113 or outlet 114 is less than or equal to the flow velocity threshold, control the heat dissipation device 1 to enter the emergency working mode.

[0079] S13a. If the temperature T of the electrical control box is greater than or equal to the first temperature threshold Tm1, then control the heat dissipation fins 121 to move closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in the second state, so that the heat of the electrical control box can be exchanged with the surrounding air through the liquid cooling plate 11 and the heat dissipation fins 121.

[0080] Whether the flow rate at the inlet 113 is less than the flow rate threshold, or the flow rate at the outlet 114 is less than the flow rate threshold, or both the flow rates at the inlet 113 and the outlet 114 are less than the flow rate threshold, it indicates that the inlet 113 or the outlet 114 of the liquid cooling plate 11 is blocked and malfunctions, the heat dissipation capacity of the liquid cooling plate 11 decreases or even fails, and at this time the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electrical control box exceeds the first temperature threshold, it indicates that the electrical control box is generating a significant amount of heat, which may affect the normal operation of electronic components. In this case, the heat dissipation fins 121 are moved closer to the liquid cooling plate 11 until they are in the second state. Since the heat dissipation fins 121 are in contact with the second side 112 of the liquid cooling plate 11, the heat from the electrical control box is transferred to the second side 112 of the liquid cooling plate 11 through thermal conduction, and then from the second side 112 of the liquid cooling plate 11 to the heat dissipation fins 121. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air, using the principles of thermal conduction and natural convection to dissipate heat. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, and prevent heat accumulation inside the electrical control box due to the failure of the liquid cooling plate 11. This ensures the normal operation of the electronic components inside the electrical control box and thus guarantees the long-term reliability of the air conditioner.

[0081] In one embodiment, the heat dissipation assembly 12 of the air conditioner includes a fan 122, which is disposed on the side of the heat dissipation fins 121 away from the liquid cooling plate 11, and includes the following after entering the emergency working mode:

[0082] If the temperature T of the electrical control box is greater than or equal to the second temperature threshold Tm2, ​​then the heat sink 121 is controlled to be in the second state, and the fan 122 is controlled to be in the on state, where Tm2 > Tm1.

[0083] Understandably, the temperature of the control box may not initially exceed Tm2, ​​but a blockage in the inlet 113 or outlet 114 of the liquid cooling plate 11 could cause a malfunction, reducing or even disabling the heat dissipation capacity of the liquid cooling plate 11. Since the electronic components inside the control box continue to generate heat, natural convection through the liquid cooling plate 11 and the heat dissipation fins 121 is insufficient, causing the temperature to continue rising. After a period of time, T ≥ Tm2. At this point, the fan 122 needs to be turned on. The fan 122 accelerates the airflow around the heat dissipation fins 121, creating forced convection between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air. This allows for faster heat removal from the control box, further improving heat dissipation efficiency and reducing the temperature of the control box. This prevents heat buildup inside the control box from affecting the performance of electronic components or causing overload damage, thus ensuring the long-term reliability of the air conditioner.

[0084] In one embodiment, entering emergency operating mode includes:

[0085] If the temperature of the electrical control box is lower than the first temperature threshold, the heat dissipation fins 121 are controlled to move away from the liquid cooling plate 11 until the heat dissipation fins 121 are in the first state, and the fan 122 is controlled to be in the off state.

[0086] It is understandable that if T < Tm1, the heat dissipation fins 121 are moved away from the liquid cooling plate 11 until the heat dissipation fins 121 are in the first state separated from the second side 112 of the liquid cooling plate 11. This indicates that the heat dissipation of the electrical control box is not serious at this time, and it is only necessary to dissipate heat through the liquid cooling plate 11, thereby reducing the overall power consumption of the heat dissipation device 1.

[0087] In one embodiment, such as Figure 5 As shown, the control method includes the following steps:

[0088] S12b: When the flow rate at the inlet 113 and the flow rate at the outlet 114 are both greater than the flow rate threshold, control the heat dissipation device 1 to enter the normal working mode.

[0089] S13b If the temperature of the electrical control box is less than or equal to the first temperature threshold, the heat dissipation fins 121 are controlled to move away from the liquid cooling plate 11 until the heat dissipation fins 121 are in the first state, and the flow rate of the inlet 113 or outlet 114 is controlled based on the temperature of the electrical control box.

[0090] Understandably, if the flow rate at both the inlet 113 and the outlet 114 is greater than the flow rate threshold, it indicates that the liquid cooling plate 11 is not malfunctioning, the heat dissipation device 1 is in normal working mode, and the liquid cooling plate 11 contains a cooling medium. The low-temperature cooling medium enters the liquid cooling plate 11 from the inlet 113. After the cooling medium of the liquid cooling plate 11 exchanges heat with the heat-generating area of ​​the electrical control box, it flows out from the outlet 114. This allows some of the heat in the electrical control box to be carried away by the cooling medium, and another part of the heat to be carried away by the heat exchange between the liquid cooling plate 11 and the surrounding air, thereby rapidly reducing the temperature of the electrical control box.

[0091] The flow rate at the inlet 113 or outlet 114 is controlled based on the temperature of the control box. Specifically, when T ≤ Tm1, the higher the temperature of the control box, the greater the flow rate at the inlet 113 or outlet 114; conversely, the lower the temperature, the smaller the flow rate. This achieves graded temperature regulation, ensuring the control box operates normally while minimizing the overall power consumption of the heat dissipation device 1. If T = Tm1, the flow rates at the inlet 113 and outlet 114 of the liquid cooling plate 11 are at their maximum, resulting in the highest heat exchange efficiency. If T = Tm4 and Tm4 < Tm1, the flow rates at the inlet 113 and outlet 114 of the liquid cooling plate 11 are at their minimum, resulting in the lowest heat exchange efficiency and reduced power consumption.

[0092] In one embodiment, the normal operating mode includes:

[0093] If the temperature of the electrical control box is greater than the first temperature threshold, the heat dissipation fins 121 are controlled to move closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in the second state.

[0094] It is understandable that if T > Tm1, it means that heat dissipation by liquid cooling plate 11 alone cannot meet the heat dissipation requirements of the electrical control box. At this time, the heat dissipation fins 121 are moved closer to the liquid cooling plate 11 until the heat dissipation fins 121 are in the second state. Since the heat dissipation fins 121 are in contact with the second side 112 of the liquid cooling plate 11, the heat of the electrical control box is transferred to the second side 112 of the liquid cooling plate 11 through heat conduction, and then transferred from the second side 112 of the liquid cooling plate 11 to the heat dissipation fins 121. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air, and dissipate heat by means of heat conduction and natural convection. The heat dissipation fins 121 increase the heat dissipation area and improve the overall heat dissipation efficiency of the heat dissipation device 1.

[0095] In one embodiment, the heat dissipation assembly 12 of the air conditioner includes a fan 122, which is disposed on the side of the heat dissipation fins 121 away from the liquid cooling plate 11. The normal operating mode includes:

[0096] If the temperature of the electrical control box is greater than the third temperature threshold, the heat sink 121 is controlled to be in the second state, and the fan 122 is controlled to be in the on state, wherein the third temperature threshold is greater than the first temperature threshold.

[0097] Understandably, natural convection cooling via the liquid cooling plate 11 and heat dissipation fins 121 is insufficient, causing the temperature to continue rising. After a period of time, when T ≥ Tm3, the fan 122 needs to be turned on. The fan 122 accelerates the airflow around the heat dissipation fins 121, creating forced convection between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air. This allows for faster removal of heat from the control box, further improving heat dissipation efficiency and reducing the temperature of the control box. This prevents heat buildup inside the control box from affecting the performance of electronic components or even causing overload damage, thus ensuring the long-term reliability of the air conditioner.

[0098] Specifically, Tm1 < Tm2 < Tm3. Since the liquid cooling plate 11 did not malfunction, its heat dissipation capacity is higher in normal working mode compared to emergency working mode. Therefore, Tm2 < Tm3. In normal working mode, the fan 122 is turned on only when T ≥ Tm3, which can minimize power consumption.

[0099] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0100] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0101] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A heat dissipation device, mounted on an electrical control box, characterized in that, The heat dissipation device includes: The liquid cooling plate includes a first side and a second side arranged opposite to each other. The first side of the liquid cooling plate is in contact with the heat-generating area of ​​the electrical control box. The liquid cooling plate is provided with a water inlet and a water outlet. A heat dissipation assembly, comprising heat dissipation fins movably disposed on the second side of the liquid cooling plate, such that the heat dissipation fins have a first state of being separated from the liquid cooling plate and a second state of being in contact with the liquid cooling plate; and The controller is configured to, when the flow rate at the inlet and / or outlet is less than a flow rate threshold, control the heat dissipation device to enter an emergency working mode; if the temperature of the electrical control box is greater than a first temperature threshold, control the heat dissipation fins to move closer to the liquid cooling plate until the heat dissipation fins are in the second state, so that the heat of the electrical control box can be exchanged with the surrounding air through the liquid cooling plate and the heat dissipation fins.

2. The heat dissipation device according to claim 1, characterized in that, The heat dissipation component includes a fan, which is disposed on the side of the heat dissipation fins away from the liquid cooling plate; The fan and the controller are electrically connected. The controller is configured to, when the flow rate at the inlet or outlet is less than a flow rate threshold, if the temperature of the electrical control box is greater than or equal to a second temperature threshold, control the heat dissipation fins to move closer to the liquid cooling plate until the heat dissipation fins are in the second state, and control the fan to be turned on, wherein the second temperature threshold is greater than the first temperature threshold.

3. The heat dissipation device according to claim 1, characterized in that, The liquid cooling plate has a cavity inside, which is connected to the water inlet and the water outlet. The liquid cooling plate has multiple fins that extend from the second side of the liquid cooling plate toward the first side of the liquid cooling plate, and a flow channel is formed between two adjacent fins.

4. The heat dissipation device according to claim 3, characterized in that, The fins are arranged in an array, with adjacent rows of fins staggered.

5. The heat dissipation device according to claim 3, characterized in that, The liquid cooling plate has a partition inside, which extends from the second side of the liquid cooling plate toward the first side of the liquid cooling plate, and a channel communicating with the flow channel is provided between the partition and the first side of the liquid cooling plate.

6. The heat dissipation device according to claim 1, characterized in that, The heat dissipation assembly includes a driving component and a transmission mechanism. The driving component is electrically connected to the controller. The driving component is connected to the transmission mechanism. The power output end of the transmission mechanism is connected to the heat dissipation fins to drive the heat dissipation fins to move relative to the liquid cooling plate.

7. The heat dissipation device according to claim 1, characterized in that, The heat dissipation assembly includes a first magnetic attraction part, a second magnetic attraction part, and a guide rail. The first magnetic attraction part is disposed on the liquid cooling plate, and the second magnetic attraction part is disposed on the heat dissipation fins. The first magnetic attraction part and the second magnetic attraction part are electrically connected to the controller. When the first magnetic attraction part and the second magnetic attraction part are energized, they have a magnetic force that attracts or repels each other. The two ends of the guide rail are slidably connected to the liquid cooling plate and the heat dissipation fins, respectively.

8. The heat dissipation device according to claim 1, characterized in that, The system includes an alarm device electrically connected to the controller, which is configured to trigger an alarm when the flow rate at the inlet or outlet is less than or equal to a flow rate threshold.

9. An electrical control box, characterized in that, Includes the heat dissipation device as described in any one of claims 1 to 8.

10. An air conditioner, characterized in that, Includes the electrical control box as described in claim 9.

11. A control method for an air conditioner, applied to the air conditioner as described in claim 10, characterized in that, The control method includes: Obtain the flow rate at the inlet and / or outlet of the liquid cooling plate, and the temperature of the electrical control box; When the flow rate at the inlet and / or outlet is less than or equal to a flow rate threshold, the heat dissipation device is controlled to enter an emergency working mode. If the temperature of the electrical control box is greater than or equal to the first temperature threshold, the heat dissipation fins are controlled to move closer to the liquid cooling plate until the heat dissipation fins are in the second state, so that the heat of the electrical control box can be exchanged with the surrounding air through the liquid cooling plate and the heat dissipation fins.

12. The control method according to claim 11, characterized in that, The heat dissipation component of the air conditioner includes a fan, which is disposed on the side of the heat dissipation fins away from the liquid cooling plate. The emergency operating mode includes: If the temperature of the electrical control box is greater than or equal to the second temperature threshold, the heat dissipation fins are controlled to be in the second state, and the fan is controlled to be in the on state, wherein the second temperature threshold is greater than the first temperature threshold.

13. The control method according to claim 12, characterized in that, The emergency response mode includes: If the temperature of the electrical control box is less than the first temperature threshold, the heat dissipation fins are controlled to move away from the liquid cooling plate until the heat dissipation fins are in the first state, and the fan is controlled to be in the off state.

14. The control method according to claim 11, characterized in that, include: When the flow rate at the inlet and the flow rate at the outlet are both greater than the flow rate threshold, the heat dissipation device is controlled to enter normal operation mode. If the temperature of the electrical control box is less than or equal to the first temperature threshold, the heat dissipation fins are controlled to move away from the liquid cooling plate until the heat dissipation fins are in the first state, and the flow rate of the water inlet or the water outlet is controlled based on the temperature of the electrical control box.

15. The control method according to claim 14, characterized in that, The normal operating modes include: If the temperature of the electrical control box is greater than the first temperature threshold, the heat dissipation fins are controlled to move closer to the liquid cooling plate until the heat dissipation fins are in the second state.

16. The control method according to claim 14, characterized in that, The heat dissipation component of the air conditioner includes a fan, which is disposed on the side of the heat dissipation fins away from the liquid cooling plate. The normal operating mode includes: If the temperature of the electrical control box is greater than the third temperature threshold, the heat dissipation fins are controlled to be in the second state, and the fan is controlled to be in the on state, wherein the third temperature threshold is greater than the first temperature threshold.

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