Heat dissipation device, electric cabinet, air conditioner and control method of air conditioner

Abstract

The invention relates to a heat dissipation device, an electric cabinet, an air conditioner and a control method thereof, the heat dissipation device is arranged on the electric cabinet, the heat dissipation device comprises a liquid cooling plate, the liquid cooling plate comprises a first side and a second side which are oppositely arranged, the first side of the liquid cooling plate is in contact with a heating area of the electric cabinet, and the liquid cooling plate is provided with a water inlet and a water outlet; the heat dissipation assembly comprises heat dissipation fins, and the heat dissipation fins are movably arranged on the second side of the liquid cooling plate, so that the heat dissipation fins have a first state in which the heat dissipation fins are separated from the liquid cooling plate and a second state in which the heat dissipation fins are attached to the liquid cooling plate; the temperature detection device is configured to detect the temperature of the electric cabinet; the flow speed control device is configured to detect the flow speed of the water inlet or the water outlet; and the temperature detection device and the flow speed control device are electrically connected with the controller. According to the heat dissipation device, the overall heat dissipation efficiency of the heat dissipation device can be improved, heat accumulation in the electric cabinet caused by failure of the liquid cooling plate is avoided, and normal work of the electric cabinet is ensured.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a heat dissipation device, an electric control box, an air conditioner and a control method thereof. Background Art

[0002] As the integration of electronic modules continues to increase, the requirements for the corresponding cooling and heat dissipation technology are becoming more stringent. The heat dissipation design of equipment is constantly updated and developed amid various difficulties and challenges. When the heat generated by electronic components exceeds their own ability to bear during operation, a large amount of heat will accumulate on the electronic components, causing the entire electronic equipment to be in a high-temperature working environment. The performance of the electronic components themselves is greatly affected, and even overload damage occurs. Therefore, in the design of electronic equipment (such as electric control boxes), how to quickly reduce the device temperature and enhance the heat dissipation design becomes more important.

[0003] In the related technologies, the heat dissipation method of liquid cooling plate heat dissipation is widely used due to its advantages of strong heat dissipation capacity, high reliability, long service life, low consumption, etc., which well meet the design requirements. However, the internal channel of the liquid cooling plate will inevitably be blocked, which will increase the flow resistance of the internal circulation of the cold plate, reduce the heat dissipation efficiency of the liquid cooling plate, and even cause the liquid cooling plate to fail, thereby affecting the performance of the electronic components of the electric control box and reducing the operating reliability of the air conditioner. Summary of the invention

[0004] The present application provides a heat dissipation device, an electrical control box, an air conditioner and a control method thereof, in order to solve the technical problem that the internal channels of the existing liquid cooling plates will inevitably become clogged, which increases the flow resistance of the internal circulation of the liquid cooling plates, reduces the heat dissipation efficiency of the liquid cooling plates and even causes the liquid cooling plates to fail, thereby affecting the performance of the electronic components of the electrical control box and reducing the operating reliability of the air conditioner.

[0005] In a first aspect, the present application provides a heat dissipation device, which is arranged on an electric control box, and the heat dissipation device includes:

[0006] The liquid cooling plate comprises a first side and a second side which are arranged opposite to each other, the first side of the liquid cooling plate contacts the heating area of ​​the electric control box, and the liquid cooling plate is provided with a water inlet and a water outlet;

[0007] A heat dissipation assembly, the heat dissipation assembly comprising heat dissipation fins, the heat dissipation fins being movably disposed on the second side of the liquid cooling plate so 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; and

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

[0009] In a possible implementation, the heat dissipation assembly includes a fan, and the fan is arranged on a side of the heat dissipation fin facing away from the liquid cooling plate;

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

[0011] In one possible implementation, a cavity is provided inside the liquid cooling plate, the cavity is connected to the water inlet and the water outlet, a plurality of fins are provided inside the liquid cooling plate, the fins extend 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 a possible implementation, a plurality of fins are arranged in an array, and two adjacent rows of fins are staggered.

[0013] In a possible implementation, a partition is disposed inside the liquid cooling plate, the partition extends 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 disposed between the partition and the first side of the liquid cooling plate.

[0014] In one possible implementation, the heat dissipation assembly includes a drive member and a transmission mechanism, the drive member and the controller are electrically connected, the drive member and the controller are electrically connected, the drive member is connected to the transmission mechanism, and 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 assembly includes a first magnetic attraction portion, a second magnetic attraction portion and a guide rail, the first magnetic attraction portion is arranged on the liquid cooling plate, the second magnetic attraction portion is arranged on the heat dissipation fins, the first magnetic attraction portion and the second magnetic attraction portion are electrically connected to the controller, and the first magnetic attraction portion and the second magnetic attraction portion have a magnetic force of mutual attraction or mutual repulsion when power is applied thereto; the two ends of the guide rail are respectively slidably connected to the liquid cooling plate and the heat dissipation fins.

[0016] In a possible implementation, an alarm device is included, and the alarm device is electrically connected to a controller, and the controller is configured to control the alarm device to sound an alarm when the flow rate at the water inlet or outlet is less than or equal to a flow rate threshold.

[0017] In a second aspect, the present application provides an electric control box, comprising the heat dissipation device as described above.

[0018] In a third aspect, the present application provides an air conditioner, comprising the electric control box as described above.

[0019] In a fourth aspect, the present application provides a control method for an air conditioner, which is applied to the air conditioner as described above, and the control method includes:

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

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

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

[0023] In a possible implementation, the heat dissipation component of the air conditioner includes a fan, which is arranged on a side of the heat dissipation fin away from the liquid cooling plate. The emergency working mode includes:

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

[0025] In a possible implementation, the emergency working mode includes:

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

[0027] In a possible implementation, it includes:

[0028] When the flow rate at the water inlet and the flow rate at the water outlet are both greater than the flow rate threshold, the heat dissipation device is controlled to enter a normal working mode;

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

[0030] In a possible implementation, the normal working mode includes:

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

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

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

[0034] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0035] The heat dissipation device, electric control box, air conditioner and control method thereof provided by the embodiment of the present application, the first side of the liquid cooling plate contacts the heating area of ​​the electric control box, so that the liquid cooling plate and the heating area of ​​the electric control box exchange heat, and take away the heat of the electric control box. The liquid cooling plate is provided with a water inlet and a water outlet. When the liquid cooling plate is not faulty, the heat dissipation device is in a normal working mode, and a cooling medium flows inside the liquid cooling plate. The low-temperature cooling medium enters the liquid cooling plate from the water inlet. The cooling medium of the liquid cooling plate exchanges heat with the heating area of ​​the electric control box and flows out from the water outlet, so that part of the heat of the electric control box is taken away by the cooling medium, and the other part of the heat is taken away by the heat exchange between the liquid cooling plate and the surrounding air, thereby quickly reducing the temperature of the electric control box. When the flow rate of the water inlet and / or the water outlet is less than the flow rate threshold, it means that the water inlet or the water outlet of the liquid cooling plate is blocked and fails, and the heat dissipation capacity of the liquid cooling plate is reduced or even fails. At this time, the heat dissipation device is controlled to enter the emergency working mode. If the temperature of the electric control box is greater than the first temperature threshold, it means that the heat generated by the electric control box is serious and may affect the normal operation of the electronic components. The heat sink fins are controlled to move closer to the liquid cooling plate until the heat sink fins are in the second state. Since the heat sink fins are in contact with the second side of the liquid cooling plate, the heat of the electric control box is transferred to the second side of the liquid cooling plate by heat conduction, and then transferred from the second side of the liquid cooling plate to the heat sink fins. The liquid cooling plate and the heat sink fins exchange heat with the surrounding air and dissipate heat using the principles of heat conduction and natural convection. The heat sink fins increase the heat dissipation area and improve the overall heat dissipation efficiency of the heat dissipation device, avoiding heat accumulation inside the electric control box due to failure of the liquid cooling plate, and can ensure the normal operation of the electronic components in the electric control box, thereby ensuring the long-term operation reliability of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

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

[0040] Figure 2 for Figure 1 A schematic diagram of the working state of the heat dissipation device is shown, wherein the heat dissipation fins are in the second state;

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

[0042] Figure 4 A flow chart of a method for controlling an air conditioner provided in one embodiment of the present application;

[0043] Figure 5 A flowchart of a method for controlling an air conditioner provided in yet another embodiment of the present application.

[0044] Description of reference numerals:

[0045] 1. heat dissipation device; 11. liquid cooling plate; 111. first side; 112. second side; 113. water inlet; 114. water outlet; 115. fin; 116. flow channel; 117. partition; 12. heat dissipation assembly; 121. heat dissipation fin; 122. fan; 123. drive member; 124. transmission bracket. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0048] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may 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 herein are interpreted accordingly.

[0049] In the related art, the heat dissipation method of liquid cooling plate heat dissipation has the advantages of strong heat dissipation capacity, strong reliability, long service life, low consumption, etc., which well meets the design requirements and is widely used in the heat dissipation of the electric control box. The overall strength of the liquid cooling plate is relatively high and the processing difficulty is low. The liquid cooling plate is installed and fixed in the electric control box, and the liquid cooling plate can play the role of support and heat dissipation at the same time. However, during the operation of the liquid cooling plate, due to the large amount of impurity ions dissolved in the liquid cooling medium, it is easy to form scale with cations such as calcium, magnesium, and iron under high temperature conditions. Microorganisms and bacterial communities will also form soft scale with chemical pollutants, dust, etc. These dirts will block the internal channels of the liquid cooling plate, increase the flow resistance of the internal circulation of the liquid cooling plate, reduce the heat dissipation efficiency of the liquid cooling plate, and even cause the liquid cooling plate to fail, thereby affecting the performance of the electronic components of the electric control box and reducing the operating reliability of the air conditioner.

[0050] In order to solve the technical problem that the internal channels of the existing liquid cooling plates will inevitably become blocked, the heat dissipation capacity of the liquid cooling plates will decrease or even fail, affecting the performance of the electronic components of the electric control box, and causing the operating reliability of the air conditioner to be affected, the present application provides a heat dissipation device, an electric control box, an air conditioner and a control method thereof, which can improve the overall heat dissipation efficiency of the heat dissipation device, avoid heat accumulation inside the electric control box due to failure of the liquid cooling plate, and ensure the normal operation of the electronic components in the electric control box, thereby ensuring the long-term operating reliability of the air conditioner.

[0051] like Figures 1 to 3 As shown, a heat dissipation device 1 provided in the present application is arranged on an electric control box. The heat dissipation device 1 includes a liquid cooling plate 11, a heat dissipation component 12 and a controller. The liquid cooling plate 11 includes a first side 111 and a second side 112 arranged opposite to each other. The first side 111 of the liquid cooling plate 11 contacts the heating area of ​​the electric control box. The liquid cooling plate 11 is provided with a water inlet 113 and a water outlet 114. The heat dissipation component 12 includes a heat dissipation fin 121. The heat dissipation fin 121 is movably arranged on the second side 112 of the liquid cooling plate 11 so that the heat dissipation fin 121 can be moved to the second side 112 of the liquid cooling plate 11. 1 has a first state of being separated from the liquid cooling plate 11, and a second state of being attached to the liquid cooling plate 11; the controller is configured to, when the flow rate of the water inlet 113 and / or the water outlet 114 is less than the flow rate threshold, control the heat dissipation device 1 to enter the emergency working mode; if the temperature of the electric control box is greater than the first temperature threshold, control the heat dissipation fins 121 to move close to the liquid cooling plate 11 until the heat dissipation fins 121 are in the second state, so that the heat of the electric control box is heat-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 heating area of ​​the electric control box. Specifically, the electric control box is provided with a mounting plate, and electronic components are provided on one side of the mounting plate. Then, the first side 111 of the liquid cooling plate 11 can be in contact with the side of the mounting plate facing away from the electronic components; or, the mounting plate is provided on the side wall of the electric control box. Then, the first side 111 of the liquid cooling plate 11 can be in contact with the corresponding side wall of the electric control box, so that heat exchange occurs between the liquid cooling plate 11 and the heating area of ​​the electric control box, thereby taking away the heat of the electric control box. The liquid cooling plate 11 is provided with a water inlet 113 and a water outlet 114. When the liquid cooling plate 11 is not faulty, the heat dissipation device 1 is in a normal working mode, and a cooling medium circulates inside the liquid cooling plate 11. The low-temperature cooling medium enters the liquid cooling plate 11 from the water inlet 113. The cooling medium of the liquid cooling plate 11 exchanges heat with the heating area of ​​the electric control box and flows out from the water outlet 114, so that part of the heat of the electric control box is taken away by the cooling medium, and the other part of the heat is taken away by the heat exchange between the liquid cooling plate 11 and the surrounding air, thereby quickly reducing the temperature of the electric control box. Of course, the water inlet 113 of the liquid cooling plate 11 can be connected to an external water tank through a pipeline, and the water outlet 114 of the liquid cooling plate 11 can be connected to an external water pump. The water tank is connected to the water pump, and the water pump provides power to drive the cooling medium to flow, thereby realizing the circulation of the cooling medium.

[0053] It can be understood that no matter whether the flow rate at the water inlet 113 is less than the flow rate threshold, or the flow rate at the water outlet 114 is less than the flow rate threshold, or the flow rates at both the water inlet 113 and the water outlet 114 are less than the flow rate threshold, it means that the water inlet 113 or the water outlet 114 of the liquid cooling plate 11 is blocked and a fault occurs, and the heat dissipation capacity of the liquid cooling plate 11 is reduced or even fails. At this time, the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electric control box is greater than the first temperature threshold Tm1, it means that the heat generated by the electric control box is serious and may affect the normal operation of the electronic components. 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 second side 112 of the liquid cooling plate 11, the heat of the electric control box is transferred to the second side 112 of the liquid cooling plate 11 by 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 the principles of heat conduction and natural convection. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, avoid heat accumulation inside the electric control box due to failure of the liquid cooling plate 11, and ensure the normal operation of the electronic components in the electric control box, thereby ensuring the long-term operation 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 electric control box. Specifically, the temperature of the electric control box can be the local temperature of the heating area of ​​the electric control box, or the internal temperature of the electric control box, or the average temperature of multiple heating areas of the electric control box. The flow rate control device is configured to detect the flow rate of the water inlet 113 and the water outlet 114. The flow rate control device can adopt an existing flow rate controller, which can accurately measure and control the flow rate of the water inlet 113 and the water 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 sink fins 121 can also be made of a material with good thermal conductivity, thereby improving the heat exchange efficiency between the heat sink fins 121 and the surrounding air, thereby improving the emergency heat dissipation performance of the heat sink 1.

[0056] The side of the heat sink 121 facing away from the liquid cooling plate 11 is provided with a plurality of heat dissipation protrusions, which can be arranged in a needle-like, columnar or plate-like shape, etc., and the present application does not make specific restrictions here. The plurality of heat dissipation protrusions are arranged in an array, and of course, the plurality of heat dissipation protrusions can also be arranged irregularly, and the present application does not make specific restrictions here. The plurality of heat dissipation protrusions increase the contact area between the heat sink 121 and the surrounding air, thereby improving the heat exchange efficiency.

[0057] In some embodiments, Figure 1 As shown, the heat dissipation component 12 includes a fan 122, and the fan 122 is arranged on the side of the heat dissipation fin 121 away from the liquid cooling plate 11; the fan 122 is electrically connected to the controller, and the controller is configured to, when the flow rate of the water inlet 113 and / or the water outlet 114 is less than the flow rate threshold, if the temperature of the electric control box is greater than or equal to the second temperature threshold Tm2, ​​control the heat dissipation fin 121 to move closer to the liquid cooling plate 11 until the heat dissipation fin 121 is in the second state, and control the fan 122 to be in the on state, wherein the second temperature threshold Tm2 is greater than the first temperature threshold Tm1.

[0058] It is understandable that if the temperature of the electric control box is greater than or equal to the second temperature threshold, it means that the electronic components of the electric control box are seriously heated, and the natural convection between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air alone cannot meet the heat dissipation requirements of the electric control box. At this time, 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, and the fan 122 is controlled to be in the on 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 heating element inside the electric control box is transferred to the heat dissipation fins 121 through the liquid cooling plate 11, and the fan 122 accelerates the air flow around the heat dissipation fins 121, so that forced convection is formed between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air, which can more quickly take away the heat of the electric control box, improve the heat dissipation efficiency, thereby reducing the temperature of the electric control box, avoiding the accumulation of heat inside the electric control box and affecting the performance of the electronic components, or even causing overload damage, and further ensuring the long-term operation reliability of the air conditioner.

[0059] In some embodiments, Figure 3 As shown, a cavity is provided inside the liquid cooling plate 11, and the cavity is connected to the water inlet 113 and the water outlet 114. A plurality of fins 115 are provided inside the liquid cooling plate 11, and 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 from the water inlet 113 and then flows out from the water outlet 114. The cooling medium circulates in the flow channel 116. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electric control box to form a high-temperature cooling medium. The high-temperature cooling medium exchanges heat with a large number of fins 115. The large number of fins 115 increase the contact area between the liquid cooling plate 11 and the cooling medium. 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 fins 115, further improving the heat exchange efficiency of the liquid cooling plate 11; on the other hand, a 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, promote the shuttling 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 electric control box, and improve the heat dissipation performance of the liquid cooling plate 11. Then, even if the liquid cooling plate 11 fails due to blockage of the flow channel 116, a 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 the heat can be exchanged with the surrounding air through the heat dissipation fins 121, avoiding heat accumulation inside the electronic control, ensuring the normal operation of the electronic components in the electronic control box, and thus ensuring the long-term operating reliability of the air conditioner.

[0060] In some embodiments, a plurality of fins 115 are arranged in an array, and two adjacent rows of fins 115 are staggered. A 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 shuttling flow of the cooling medium in different flow channels 116, reduce the temperature difference of the fluid in 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 forms. For example, in the direction from the water inlet 113 of the liquid cooling plate 11 to the water outlet of the liquid cooling plate 11, the distance between two adjacent rows of fins 115 gradually decreases; or, in the direction from the water inlet 113 of the liquid cooling plate 11 to the water 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 shuttling 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.

[0061] It should be noted that the fin 115 can be configured to be in a needle-like, column-like, or plate-like shape, and the present application does not limit this.

[0062] In an optional embodiment, the fin 115 can be configured to be needle-shaped, with the first end of the needle-shaped fin 115 connected to the second side 112 of the liquid cooling plate 11, and the second end of the needle-shaped fin 115 extending toward the first side 111 of the liquid cooling plate 11, and two adjacent rows of needle-shaped fins 115 being staggered. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electric control box to form a high-temperature cooling medium, and the high-temperature cooling medium exchanges heat with a large number of pin-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 pin-shaped fins 115, thereby further improving the heat exchange efficiency of the liquid cooling plate 11. On the other hand, the two adjacent rows of pin-shaped fins 115 are staggered, and a large number of pin-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 shuttling 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 between the liquid cooling plate 11 and the electric control box. At the same time, it can 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 fin 115 can be configured to be 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 two adjacent rows of columnar fins 115 being staggered. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electric control box to form a high-temperature cooling medium, and the high-temperature cooling medium exchanges heat with a large number of columnar 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 columnar fins 115, thereby 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, and a 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 shuttling 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 between the liquid cooling plate 11 and the electric control box. At the same time, it can 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, the plate-shaped 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 two adjacent rows of plate-shaped fins 115 are staggered. On the one hand, heat exchange occurs between the low-temperature cooling medium and the electric control box to form a high-temperature cooling medium, and the high-temperature cooling medium exchanges heat with a large number of plate-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 plate-shaped fins 115, thereby 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, and 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 shuttling 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 between the liquid cooling plate 11 and the electric control box. At the same time, it can 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, if Figure 3As shown, a partition 117 is provided inside the liquid cooling plate 11, and 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 connected to 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 a plurality of heat exchange areas, which on the one hand enhances the structural strength of the liquid cooling plate 11, and on the other hand increases the contact area between the liquid cooling plate 11 and the cooling medium, thereby promoting heat dissipation. The cooling medium passes through the channel from the flow channel 116, and flows out from the water outlet 114 after sufficient heat exchange with the electric control box. A plurality of partitions 117 may be provided, and the plurality of partitions 117 are arranged at intervals. In this embodiment, two partitions 117 are provided inside the liquid cooling plate 11.

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

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

[0068] In an optional embodiment, if Figure 1 and Figure 2 As shown, the driving member 123 includes a hydraulic cylinder, the transmission mechanism includes a transmission bracket 124, the transmission bracket 124 is arranged on the heat sink fin 121, the hydraulic cylinder is fixedly installed on the liquid cooling plate 11, the piston rod of the hydraulic cylinder is arranged in the vertical direction, the piston rod of the hydraulic cylinder is connected to the transmission bracket 124, the hydraulic cylinder drives the transmission bracket 124 to move, and drives the heat sink fin 121 to move in the vertical direction relative to the liquid cooling plate 11, so as to realize the switching of the heat sink fin 121 between the first state and the second state. Of course, the piston rod of the hydraulic cylinder can also be arranged in the vertical direction, so as to drive the heat sink fin 121 to move in the horizontal direction relative to the liquid cooling plate 11, and the switching of the heat sink fin 121 between the first state and the second state can also be realized.

[0069] When the heat dissipation capacity of the liquid cooling plate 11 cannot meet the heat dissipation requirements of the electric control box, the controller controls the piston rod of the hydraulic cylinder to contract, and the heat dissipation fins 121 move closer to the liquid cooling plate 11 under the action of the magnetic attraction until the heat dissipation fins 121 are in the second state of being in contact with the second side 112 of the liquid cooling plate 11, and the heat dissipation can be dissipated by heat conduction between the liquid cooling plate 11 and the heat dissipation fins 121, and 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 heat dissipation method of the liquid cooling plate 11 and the heat dissipation fins 121 combined still cannot meet the heat dissipation requirements of the electric control box, the fan 122 can also be controlled to be in the on state, and the fan 122 accelerates the air flow around the heat dissipation fins 121, and the heat dissipation can be dissipated by heat conduction between the liquid cooling plate 11 and the heat dissipation fins 121, and by forced convection between the heat dissipation fins 121 and the surrounding air, thereby further improving the overall heat dissipation capacity of the heat dissipation device 1.

[0070] In some embodiments, the heat dissipation assembly 12 includes a first magnetic attraction portion, a second magnetic attraction portion, and a guide rail. The first magnetic attraction portion is disposed on the liquid cooling plate 11, and the second magnetic attraction portion is disposed on the heat dissipation fin 121. The first magnetic attraction portion and the second magnetic attraction portion are electrically connected to the controller. When the first magnetic attraction portion and the second magnetic attraction portion are energized, there is a magnetic force of mutual attraction or mutual repulsion. The two ends of the guide rail are respectively slidably connected to the liquid cooling plate 11 and the heat dissipation fin 121 to improve the stability of the movement of the heat dissipation fin 121. When the heat dissipation capacity of the liquid cooling plate 11 cannot meet the heat dissipation requirements of the electric control box, the controller controls the first magnetic attraction portion and the second magnetic attraction portion to have a mutual attraction magnetic force after power is turned on. The heat dissipation fin 121 moves close to the liquid cooling plate 11 under the action of the magnetic attraction until the heat dissipation fin 121 is in a second state of being attached to the second side 112 of the liquid cooling plate 11. Heat conduction between the liquid cooling plate 11 and the heat dissipation fin 121 and natural convection between the heat dissipation fin 121 and the surrounding air can be used to dissipate heat, thereby improving the overall heat dissipation capacity of the heat dissipation device 1. When the combined heat dissipation method of the liquid cooling plate 11 and the cooling fins 121 still cannot meet the heat dissipation requirements of the electrical control box, the fan 122 can also be controlled to be in an on state. The fan 122 accelerates the air flow around the cooling fins 121, and utilizes the heat conduction between the liquid cooling plate 11 and the cooling fins 121, as well as the forced convection between the cooling fins 121 and the surrounding air to dissipate heat, 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, which is electrically connected to a controller, and the controller is configured to control the alarm device to sound an alarm when the flow rate of the water inlet 113 or the water outlet 114 is less than or equal to the flow rate threshold. The alarm device includes a display screen, and when the flow rate of the water inlet 113 or the water outlet 114 is less than or equal to the flow rate threshold, the display screen can display the flow rate of the water inlet 113 or the water outlet 114, and issue a text warning or a sound warning at the same time, to warn of the failure of the liquid cooling plate 11, and to remind the user to check the flow channel 116 of the liquid cooling plate 11.

[0072] The present application provides an electric control box, comprising the heat dissipation device 1 as described above.

[0073] When the flow rate of the water inlet 113 or the water outlet 114 is less than the flow rate threshold, it means that the water inlet 113 or the water outlet 114 of the liquid cooling plate 11 is blocked and fails, and the heat dissipation capacity of the liquid cooling plate 11 decreases or even fails. At this time, the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electric control box is greater than the first temperature threshold, it means that the heat generation of the electric control box is serious and may affect the normal operation of the electronic components. Then, 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 attached to the liquid cooling plate 11, the heat of the electric control box is transferred to the liquid cooling plate 11 and the heat dissipation fins 121 by heat conduction. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air, and the heat is dissipated by the principles of heat conduction and natural convection. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, avoid the accumulation of heat inside the electric control box due to the failure of the liquid cooling plate 11, and ensure the normal operation of the electronic components in the electric control box.

[0074] An embodiment of the present application provides an air conditioner, comprising the electric control box as described above.

[0075] When the flow rate of the water inlet 113 or the water outlet 114 is less than the flow rate threshold, it means that the water inlet 113 or the water outlet 114 of the liquid cooling plate 11 is blocked and a fault occurs, and the heat dissipation capacity of the liquid cooling plate 11 is reduced or even fails. At this time, the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electric control box is greater than the first temperature threshold, it means that the heat generated by the electric control box is serious and may affect the normal operation of the electronic components. 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 electric control box is transferred to the liquid cooling plate 11 and the heat dissipation fins 121 through heat conduction. The liquid cooling plate 11 and the heat dissipation fins 121 exchange heat with the surrounding air and dissipate heat by the principles 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, thereby avoiding heat accumulation inside the electric control box due to failure of the liquid cooling plate 11, and ensuring the normal operation of the electronic components in the electric control box, thereby ensuring the long-term operation reliability of the air conditioner.

[0076] like Figure 4 As shown, the present application provides a control method for an air conditioner, which is applied to the air conditioner as described above, and the control method comprises the following steps:

[0077] S11, obtaining the flow rate of the water inlet 113 and / or the water outlet 114 of the liquid cooling plate 11 and the temperature of the electric control box;

[0078] S12a, when the flow rate of the water inlet 113 or the water outlet 114 is less than or equal to the flow rate threshold, controlling the heat dissipation device 1 to enter the emergency working mode;

[0079] S13a, if the temperature T of the electric control box is greater than or equal to the first temperature threshold Tm1, control the heat sink 121 to move closer to the liquid cooling plate 11 until the heat sink 121 is in the second state, so that the heat of the electric control box can exchange heat with the surrounding air through the liquid cooling plate 11 and the heat sink 121.

[0080] Whether the flow rate at the water inlet 113 is less than the flow rate threshold, or the flow rate at the water outlet 114 is less than the flow rate threshold, or the flow rates at both the water inlet 113 and the water outlet 114 are less than the flow rate threshold, it means that the water inlet 113 or the water outlet 114 of the liquid cooling plate 11 is blocked and a fault occurs, and the heat dissipation capacity of the liquid cooling plate 11 is reduced or even fails. At this time, the heat dissipation device 1 is controlled to enter the emergency working mode. If the temperature of the electric control box is greater than the first temperature threshold, it means that the heat generated by the electric control box is serious and may affect the normal operation of the electronic components. 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 second side 112 of the liquid cooling plate 11, the heat of the electric control box is transferred to the second side 112 of the liquid cooling plate 11 by 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 the principles of heat conduction and natural convection. The heat dissipation fins 121 increase the heat dissipation area, improve the overall heat dissipation efficiency of the heat dissipation device 1, avoid heat accumulation inside the electric control box due to failure of the liquid cooling plate 11, and ensure the normal operation of the electronic components in the electric control box, thereby ensuring the long-term operation reliability of the air conditioner.

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

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

[0083] It is understandable that the temperature of the electric control box may not exceed Tm2 at the beginning, but the water inlet 113 or the water outlet 114 of the liquid cooling plate 11 is blocked and fails, and the heat dissipation capacity of the liquid cooling plate 11 decreases or even fails. Since the electronic components inside the electric control box continue to heat up, the natural convection heat dissipation through the liquid cooling plate 11 and the heat dissipation fins 121 is not enough, so the temperature continues to rise. After a period of time, T ≥ Tm2, ​​at this time, the fan 122 needs to be turned on. The fan 122 accelerates the air flow around the heat dissipation fins 121, so that forced convection is formed between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air, which can quickly take away the heat of the electric control box, further improve the heat dissipation efficiency, thereby reducing the temperature of the electric control box, avoiding the accumulation of heat inside the electric control box, which may affect the performance of the electronic components, or even cause overload damage, and further ensure the long-term operation reliability of the air conditioner.

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

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

[0086] It can be understood that if T<Tm1, the heat sink fins 121 are controlled to move away from the liquid cooling plate 11 until the heat sink fins 121 are in the first state separated from the second side 112 of the liquid cooling plate 11, indicating that the heating of the electric control box is not serious at this time, and the heat only needs to be dissipated through the liquid cooling plate 11, thereby reducing the overall power consumption of the heat sink 1.

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

[0088] S12b, when the flow rate of the water inlet 113 and the flow rate of the water outlet 114 are both greater than the flow rate threshold, controlling the heat dissipation device 1 to enter a normal working mode;

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

[0090] It can be understood that when the flow rate at the water inlet 113 and the flow rate at the water outlet 114 are both greater than the flow rate threshold, it means that the liquid cooling plate 11 has not failed, the heat dissipation device 1 is in a normal working mode, and a cooling medium is circulating inside the liquid cooling plate 11. The low-temperature cooling medium enters the liquid cooling plate 11 from the water inlet 113, and the cooling medium of the liquid cooling plate 11 exchanges heat with the heating area of ​​the electric control box and then flows out from the water outlet 114, so that part of the heat of the electric control box is taken away by the cooling medium, and the other part of the heat is taken away by the heat exchange between the liquid cooling plate 11 and the surrounding air, thereby quickly reducing the temperature of the electric control box.

[0091] The flow rate of the water inlet 113 or the water outlet 114 is controlled based on the temperature of the electric control box. Specifically, in the case of T≤Tm1, if the temperature of the electric control box is higher, the flow rate of the water inlet 113 or the water outlet 114 is controlled to be greater; if the temperature of the electric control box is lower, the flow rate of the water inlet 113 or the water outlet 114 is controlled to be smaller, thereby achieving the purpose of graded temperature adjustment and ensuring that the overall power consumption of the heat dissipation device 1 is reduced under the premise of normal operation of the electric control box. If T=Tm1, the flow rate of the water inlet 113 and the water outlet 114 of the liquid cooling plate 11 is the largest, and the heat exchange efficiency of the liquid cooling plate 11 is the highest; if T=Tm4, Tm4<Tm1, the flow rate of the water inlet 113 and the water outlet 114 of the liquid cooling plate 11 is the smallest, and the heat exchange efficiency of the liquid cooling plate 11 is the lowest, reducing power consumption.

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

[0093] If the temperature of the electric 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 can be understood that if T>Tm1, it means that heat dissipation only through the liquid cooling plate 11 cannot meet the heat dissipation demand of the electric control box. At this time, 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 second side 112 of the liquid cooling plate 11, the heat of the electric control box is transferred to the second side 112 of the liquid cooling plate 11 by 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 the principles 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, and the fan 122 is arranged on a side of the heat dissipation fin 121 away from the liquid cooling plate 11. The normal working mode includes:

[0096] If the temperature of the electric control box is greater than a third temperature threshold, the heat sink fins 121 are 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] It is understandable that the natural convection heat dissipation through the liquid cooling plate 11 and the heat dissipation fins 121 is not enough, so the temperature continues to rise. After a period of time, T≥Tm3, the fan 122 needs to be turned on. The fan 122 accelerates the air flow around the heat dissipation fins 121, so that forced convection is formed between the liquid cooling plate 11 and the heat dissipation fins 121 and the surrounding air, which can quickly take away the heat of the electric control box, further improve the heat dissipation efficiency, thereby reducing the temperature of the electric control box, avoiding the accumulation of heat inside the electric control box, which may affect the performance of the electronic components, or even cause overload damage, and further ensure the long-term operation reliability of the air conditioner.

[0098] Specifically, Tm1<Tm2<Tm3. Since the liquid cooling plate 11 has no fault, the heat dissipation capacity of the liquid cooling plate 11 is higher in the normal working mode than in the emergency working mode. Therefore, Tm2<Tm3, in the 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 terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0100] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0101] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A heat dissipation device, arranged on an electric control box, characterized in that: The heat dissipation device comprises: A liquid cooling plate, comprising a first side and a second side arranged opposite to each other, wherein the first side of the liquid cooling plate contacts the heating area of ​​the electric control box, and the liquid cooling plate is provided with a water inlet and a water outlet; a heat dissipation assembly, the heat dissipation assembly comprising heat dissipation fins, the heat dissipation fins being movably disposed on the second side of the liquid cooling plate so 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; and A controller, wherein the controller is configured to, when the flow rate at the water inlet and / or the water outlet is less than a flow rate threshold, control the heat dissipation device to enter an emergency working mode; if the temperature of the electric 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 electric control box can be heat-exchanged with the surrounding air via the liquid cooling plate and the heat dissipation fins.

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

3. The heat dissipation device according to claim 1, characterized in that: A cavity is provided inside the liquid cooling plate, and the cavity is communicated with the water inlet and the water outlet. A plurality of fins are provided inside the liquid cooling plate, and the fins extend 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.

4. The heat dissipation device according to claim 3, characterized in that: The plurality of fins are arranged in an array, and the fins in two adjacent rows are staggered.

5. The heat dissipation device according to claim 3, characterized in that: A partition is disposed inside the liquid cooling plate, and the partition extends from the second side of the liquid cooling plate to the first side of the liquid cooling plate. A channel communicating with the flow channel is disposed 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 member and a transmission mechanism, the driving member is electrically connected to the controller, the driving member is electrically connected to the controller, the driving member is connected to the transmission mechanism, and the power output end of the transmission mechanism is connected to the heat dissipation fins for driving 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 arranged on the liquid cooling plate, the second magnetic attraction part is arranged on the heat dissipation fins, the first magnetic attraction part and the second magnetic attraction part are electrically connected to the controller, and the first magnetic attraction part and the second magnetic attraction part have a magnetic force of mutual attraction or mutual repulsion when power is applied thereto; the two ends of the guide rail are respectively slidably connected to the liquid cooling plate and the heat dissipation fins.

8. The heat dissipation device according to claim 1, characterized in that: An alarm device is included, the alarm device is electrically connected to the controller, and the controller is configured to control the alarm device to sound an alarm when the flow rate at the water inlet or the water outlet is less than or equal to a flow rate threshold.

9. An electric control box, characterized in that: Comprising the heat dissipation device according to any one of claims 1 to 8.

10. An air conditioner, characterized in that: Comprising the electric control box as claimed in claim 9.

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

12. The control method according to claim 11, characterized in that: The heat dissipation component of the air conditioner includes a fan, and the fan is arranged on a side of the heat dissipation fin away from the liquid cooling plate. The emergency working mode includes: If the temperature of the electric control box is greater than or equal to a second temperature threshold, the heat sink fins are controlled to be in the second state, and the fan is controlled to be in an 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 working mode includes: If the temperature of the electric control box is lower than a first temperature threshold, the heat sink fins are controlled to move away from the liquid cooling plate until the heat sink fins are in the first state, and the fan is controlled to be in an off state.

14. The control method according to claim 11, characterized in that: include: When the flow rate of the water inlet and the flow rate of the water outlet are both greater than the flow rate threshold, controlling the heat dissipation device to enter a normal working mode; If the temperature of the electrical control box is less than or equal to the first temperature threshold, the cooling fins are controlled to move away from the liquid cooling plate until the cooling 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 working mode includes: If the temperature of the electric control box is greater than the first temperature threshold, the heat sink fins are controlled to move closer to the liquid cooling plate until the heat sink 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, and the fan is arranged on a side of the heat dissipation fin away from the liquid cooling plate. The normal working mode includes: If the temperature of the electric control box is greater than a third temperature threshold, the heat sink fins are controlled to be in the second state, and the fan is controlled to be in an on state, wherein the third temperature threshold is greater than the first temperature threshold.

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