Heat dissipation device and server

Abstract

The utility model discloses a heat dissipation device and a server, and relates to the technical field of heat dissipation, and the heat dissipation device comprises a liquid cooling heat dissipation part which comprises a liquid cooling plate; the air cooling heat dissipation part comprises a driving assembly and a heat dissipation plate assembly which are arranged on the liquid cooling plate, the heat dissipation plate assembly comprises a plurality of heat dissipation plates and a plurality of foldable connecting pieces, the heat dissipation plates are sequentially arranged at intervals in the preset direction, and the foldable connecting pieces are arranged in the preset direction in an extensible or foldable mode; any two adjacent heat dissipation plates are connected through at least one of the foldable connecting pieces. The liquid cooling plate is fixedly connected with the first heat dissipation plate, and the driving end of the driving assembly is in driving connection with the last heat dissipation plate, so that the multiple heat dissipation plates are switched between the unfolded state and the folded state. The problem that a liquid cooling plate device in the prior art lacks a rapid emergency heat dissipation function in a cooling liquid system failure or high-load scene is solved, and the technical effect of ensuring the stability of a server during high-load operation is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation technology, and in particular to a heat dissipation device and a server. BACKGROUND

[0002] In the heat dissipation technology of high-performance electronic devices, liquid cooling heat dissipation has become the first choice for heat dissipation solutions of high heat flux density devices such as data center servers and high-performance computers due to its high efficiency and stability. The liquid cooling heat dissipation system can quickly transfer heat from the heat source to the cooling liquid by building a cooling liquid flow channel inside the liquid cooling plate and directly contacting the heat generating elements, thereby achieving efficient heat dissipation. However, the current liquid cooling heat dissipation system has the following obvious defects when facing sudden situations or extreme high-load scenarios:

[0003] The heat dissipation failure has limited response capacity, such as cooling liquid leakage, circulating pump failure or excessively high cooling liquid temperature, which causes a sharp drop or complete failure of heat dissipation efficiency, lacks immediate and effective emergency heat dissipation mechanism, and thus cannot meet the heat dissipation needs of CPU and other key components, which may cause component overheating and damage, and endanger the stability and operating efficiency of electronic devices; the heat dissipation capacity is insufficient under high-load scenarios, especially when a server cluster or high-performance computer is performing large-scale data processing, the heat increases rapidly, and the single liquid cooling method is difficult to adjust in time to cope with the instantaneous heat surge, and the heat dissipation efficiency is limited. Invention content

[0004] The present application provides a heat dissipation device and a server to at least solve the problem of lack of rapid emergency heat dissipation function of the liquid cooling plate device in the related art when the cooling liquid system fails or under high-load scenarios.

[0005] The present application provides a heat dissipation device, comprising: a liquid cooling heat dissipation part comprising a liquid cooling plate for contacting a heat generating component to dissipate heat from the heat generating component; an air cooling heat dissipation part comprising a driving assembly and a heat dissipation plate assembly arranged on the liquid cooling plate, the heat dissipation plate assembly comprising a plurality of heat dissipation plates and a plurality of foldable connecting pieces, the plurality of heat dissipation plates being arranged in sequence and spaced apart along a predetermined direction, each foldable connecting piece being arranged in an extendable or foldable manner along the predetermined direction, and any two adjacent heat dissipation plates being connected by at least one of the plurality of foldable connecting pieces, so that the plurality of heat dissipation plates have an unfolded state when the plurality of foldable connecting pieces are extended and a folded state when the plurality of foldable connecting pieces are folded; wherein the liquid cooling plate is fixedly connected to the first heat dissipation plate of the plurality of heat dissipation plates, and the driving end of the driving assembly is drivingly connected to the last heat dissipation plate of the plurality of heat dissipation plates, so as to switch the plurality of heat dissipation plates between the unfolded state and the folded state.

[0006] Further, the foldable connecting piece comprises a first piece and a second piece connected relatively rotatably, one end of the first piece away from the second piece is used for being hinged with one of the corresponding two adjacent heat dissipation plates, and the other end of the first piece away from the second piece is used for being hinged with the other of the corresponding two adjacent heat dissipation plates, so that the corresponding two adjacent heat dissipation plates can move towards or away from each other along the predetermined direction.

[0007] Further, the driving assembly comprises a driving part and a transmission part, the driving body of the driving part is arranged on the liquid cooling plate, the driving shaft of the driving part is in transmission connection with the transmission part, the transmission part is in transmission connection with the driving end of the driving assembly and the last heat dissipation plate of the plurality of heat dissipation plates, so as to drive the last heat dissipation plate of the plurality of heat dissipation plates to move along the predetermined direction.

[0008] Further, the driving part is a rotary motor; the transmission part comprises a gear and a rack, the rotation axis of the gear is perpendicular to the predetermined direction, the rack extends along the predetermined direction, the rack and the gear are in meshing with each other, and one end of the rack is fixedly connected with the last heat dissipation plate of the plurality of heat dissipation plates, the rotation shaft of the rotary motor is connected with the gear to drive the gear to rotate, so as to drive the last heat dissipation plate of the plurality of heat dissipation plates to move through the rack; or, a lead screw and a nut, the lead screw extends along the predetermined direction, the nut is sleeved on the lead screw and is in threaded connection with the lead screw, the nut is fixedly connected with the last heat dissipation plate of the plurality of heat dissipation plates, the rotation shaft of the rotary motor is connected with the lead screw to drive the lead screw to rotate, so as to drive the last heat dissipation plate of the plurality of heat dissipation plates to move along the lead screw through the nut.

[0009] Further, the driving part is a linear motor or a gas cylinder; the transmission part comprises a connecting rod, the connecting rod extends along the predetermined direction, two ends of the connecting rod are respectively connected with the piston rod of the linear motor or the gas cylinder and the last heat dissipation plate of the plurality of heat dissipation plates, so as to drive the last heat dissipation plate of the plurality of heat dissipation plates to move under the driving of the piston rod of the linear motor or the gas cylinder.

[0010] Further, the driving assembly comprises a controller electrically connected with the driving part to control the working state of the driving part; the driving assembly further comprises: a temperature sensor arranged on the heat generating member and electrically connected with the controller to monitor the real-time temperature of the heat generating member, and transmit the data of the real-time temperature to the controller in the form of an electric signal of the real-time temperature, so that the controller controls the working state of the driving part according to the electric signal of the real-time temperature; and / or a first limit sensor arranged at a first predetermined position on the liquid cooling plate and electrically connected with the controller, the first predetermined position being a position of the last one of the plurality of heat dissipation plates when the plurality of heat dissipation plates are in the unfolded state, the first limit sensor transmitting a corresponding first-to-position electric signal to the controller after detecting that the last one of the plurality of heat dissipation plates moves to the position, so that the controller controls the driving part to stop working; and / or a second limit sensor arranged at a second predetermined position on the liquid cooling plate and electrically connected with the controller, the second predetermined position being a position of the last one of the plurality of heat dissipation plates when the plurality of heat dissipation plates are in the folded state, the second limit sensor transmitting a corresponding second-to-position electric signal to the controller after detecting that the last one of the plurality of heat dissipation plates moves to the position, so that the controller controls the driving part to stop working.

[0011] Further, the liquid cooling plate is a rectangular plate, and the predetermined direction is parallel to the liquid cooling plate; the heat dissipation plate is a rectangular plate, and the heat dissipation plate is perpendicular to the liquid cooling plate and perpendicular to the predetermined direction; and / or the liquid cooling heat dissipation part further comprises a heat conduction layer, the liquid cooling plate is provided with a positioning groove for mounting the heat conduction layer, and the liquid cooling plate is in contact with the heat dissipation plate assembly through the heat conduction layer; and / or the air cooling heat dissipation part further comprises a plurality of magnetic attraction members, each heat dissipation plate is provided with magnetic attraction members on opposite sides, and the magnetic properties of the magnetic attraction members on the first side of each heat dissipation plate are opposite to those of the magnetic attraction members on the second side of each heat dissipation plate; and / or the number of driving assemblies is multiple, and the number of heat dissipation plate assemblies is also multiple, and the multiple driving assemblies are one-to-one drivingly connected with the multiple heat dissipation plate assemblies.

[0012] Further, the liquid cooling plate has a refrigerant containing cavity, and a refrigerant inlet and a refrigerant outlet respectively communicating with the refrigerant containing cavity; wherein the refrigerant inlet and the refrigerant outlet are respectively located on opposite sides of the air cooling heat dissipation part.

[0013] Further, the liquid cooling heat dissipation part further comprises: a refrigerant inlet pipe, an outlet of the refrigerant inlet pipe being connected with the refrigerant inlet, and an inlet of the refrigerant inlet pipe being used to be connected with an outlet of a refrigerant supply device; a refrigerant outlet pipe, an inlet of the refrigerant outlet pipe being connected with the refrigerant outlet, and an outlet of the refrigerant outlet pipe being used to be connected with an outlet of the refrigerant supply device; wherein the refrigerant inlet pipe and the refrigerant outlet pipe both extend along the predetermined direction.

[0014] The application also provides a server, comprising: a server body and a heat generating component arranged in the server body; and the heat dissipation device described above, which is arranged in the interior of the server body and in contact with the heat generating component to dissipate heat from the heat generating component.

[0015] According to the application, the heat dissipation device comprises: a liquid cooling heat dissipation part comprising a liquid cooling plate for being in contact with the heat generating component to dissipate heat from the heat generating component; and an air cooling heat dissipation part comprising a driving assembly and a heat dissipation plate assembly arranged on the liquid cooling plate, the heat dissipation plate assembly comprising a plurality of heat dissipation plates and a plurality of foldable connecting pieces, the plurality of heat dissipation plates being arranged in sequence and at intervals along a predetermined direction, each of the plurality of foldable connecting pieces being arranged in an extendable or foldable manner along the predetermined direction, and any two adjacent heat dissipation plates being connected by at least one of the plurality of foldable connecting pieces, so that the plurality of heat dissipation plates have an unfolded state when the plurality of foldable connecting pieces are extended and a folded state when the plurality of foldable connecting pieces are folded; wherein the liquid cooling plate is fixedly connected to the first heat dissipation plate of the plurality of heat dissipation plates, and the driving end of the driving assembly is drivingly connected to the last heat dissipation plate of the plurality of heat dissipation plates, so as to switch the plurality of heat dissipation plates between the unfolded state and the folded state. The heat dissipation device of the application integrates the liquid cooling heat dissipation part and the air cooling heat dissipation part, realizes flexible conversion of the heat dissipation mode, and uses the liquid cooling plate as the core of the liquid cooling heat dissipation, so that the coolant flowing through the coolant accommodating cavity of the liquid cooling plate can efficiently absorb and transfer heat from the heat generating component, and the heat dissipation plate assembly of the air cooling heat dissipation part can provide an additional heat dissipation path when needed, especially when the liquid cooling heat dissipation part cannot meet the heat dissipation requirement, the heat exchange can be accelerated by the flowing air, the two heat dissipation modes are complementary, the heat dissipation efficiency and reliability are improved, and the heat dissipation device can automatically adjust the heat dissipation mode under different working conditions, thereby solving the problem in the related art that the liquid cooling plate device lacks a rapid emergency heat dissipation function in a cooling liquid system failure or high-load scenario, and achieving the technical effects of ensuring the stability and safety of electronic equipment such as a server under high-load operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the application, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 A structural schematic view of the heat dissipation device in one direction when the plurality of heat dissipation plates are in the folded state is shown in FIG. 1.

[0018] Figure 2 A structural schematic view of the heat dissipation device in another direction is shown in FIG. 2. Figure 1

[0019] Figure 3 A structural schematic view of the heat dissipation device in another direction is shown in FIG. 2.​Figure 1 A top view of the heat dissipation device shown in the figure;

[0020] Figure 4 For Figure 1 The structure of the heat dissipation device shown in the figure during the process of switching the plurality of heat dissipation plates between the unfolded state and the folded state;

[0021] Figure 5 For Figure 4 The local enlarged view of A of the heat dissipation device shown in the figure;

[0022] Figure 6 For Figure 1 The structure of the heat dissipation device shown in the figure when the plurality of heat dissipation plates are in the unfolded state;

[0023] Figure 7 For Figure 1 The structure of the first embodiment of the driving assembly of the heat dissipation device shown in the figure;

[0024] Figure 8 For Figure 1 The structure of the second embodiment of the driving assembly of the heat dissipation device shown in the figure;

[0025] Figure 9 For Figure 1 The structure of the third embodiment of the driving assembly of the heat dissipation device shown in the figure.

[0026] Among them, the above-mentioned drawings include the following reference signs:

[0027] 1, liquid cooling heat dissipation part; 11, liquid cooling plate; 12, refrigerant inlet pipe; 13, refrigerant outlet pipe;

[0028] 2, air-cooled heat dissipation part; 21, driving assembly; 211, driving part; 212, transmission part; 2121, gear; 2122, rack; 2123, lead screw; 2124, nut; 2125, connecting rod; 22, heat dissipation plate assembly; 221, heat dissipation plate; 222, foldable connecting piece; 2221, first piece; 2222, second piece. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "mount", "connect", "connect" should be broadly understood, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication between two elements. The terms "parallel", "perpendicular", "equal" include the described case and the case similar to the described case, and the range of the similar case is within the acceptable deviation range, wherein the acceptable deviation range is determined by the ordinary skilled in the art considering the measurement being discussed and the error related to the measurement of the specific quantity (i.e. the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular can also be, for example, within 5° deviation. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equalities is less than or equal to 5% of either. For the ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood in specific cases.

[0031] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0032] As Figures 1 to 9As shown, the application provides a heat dissipation device, comprising: a liquid cooling heat dissipation part 1, comprising a liquid cooling plate 11 for contacting a heat generating component to dissipate heat from the heat generating component; an air cooling heat dissipation part 2, comprising a driving assembly 21 and a heat dissipation plate assembly 22 arranged on the liquid cooling plate 11, the heat dissipation plate assembly 22 comprising a plurality of heat dissipation plates 221 and a plurality of foldable connecting pieces 222, the plurality of heat dissipation plates 221 being arranged in sequence and spaced apart along a predetermined direction, each foldable connecting piece 222 being arranged in an extendable or foldable manner along the predetermined direction, and any two adjacent heat dissipation plates 221 being connected by at least one of the plurality of foldable connecting pieces 222, so that the plurality of heat dissipation plates 221 has an unfolded state when the plurality of foldable connecting pieces 222 are extended and a folded state when the plurality of foldable connecting pieces 222 are folded; wherein the liquid cooling plate 11 is fixedly connected to the first heat dissipation plate 221 of the plurality of heat dissipation plates 221, and the driving end of the driving assembly 21 is drivingly connected to the last heat dissipation plate 221 of the plurality of heat dissipation plates 221, so as to switch the plurality of heat dissipation plates 221 between the unfolded state and the folded state.

[0033] The heat dissipation device of the application realizes flexible conversion of heat dissipation modes by integrating the liquid cooling heat dissipation part 1 and the air cooling heat dissipation part 2. The liquid cooling plate 11 is the core of liquid cooling heat dissipation, and the coolant flowing through the coolant containing cavity thereof can efficiently absorb and transfer heat from the heat generating component. The heat dissipation plate assembly 22 of the air cooling heat dissipation part 2 can provide an additional heat dissipation path when needed, especially when the liquid cooling heat dissipation part 1 cannot meet the heat dissipation demand. The two heat dissipation modes are complementary, improving the heat dissipation efficiency and reliability, so that the heat dissipation device can automatically adjust the heat dissipation mode under different working conditions, solving the problem of lack of rapid emergency heat dissipation function of the liquid cooling plate device in the related art when the cooling liquid system fails or in high load scenarios, and ensuring the stability and safety of electronic equipment such as servers under high load operation.

[0034] Specifically, the liquid cooling heat dissipation efficiency of the heat dissipation device of the application can be further improved by optimizing the type and flow control strategy of the coolant.

[0035] Compared with the traditional liquid cooling and air cooling combined heat dissipation device, the heat dissipation device of the application has a simpler structure and occupies less space. In normal operation, the liquid cooling heat dissipation is mainly used, and the plurality of heat dissipation plates 221 are in the folded state, without occupying additional internal space of the equipment. When the liquid cooling fails or the heat dissipation demand increases rapidly, the air cooling heat dissipation can be quickly started, and the plurality of heat dissipation plates 221 are switched to the unfolded state to quickly respond to the heat dissipation demand, significantly improving the emergency heat dissipation capacity of the liquid cooling plate 11.

[0036] In the heat dissipation device, the liquid cooling plate 11 is a pure metal flat plate structure, which can be made of copper or aluminum with good thermal conductivity, and the internal part of the coolant containing cavity is formed by fine machining to form cooling liquid flow channels in communication with each other to flow the cooling liquid and take away the heat transferred to the liquid cooling plate 11; the heat dissipation plate 221 is a sheet type, which is made of light and high thermal conductivity metal material, such as aluminum alloy.

[0037] As shown in Figure 5 The foldable connecting piece 222 at least includes a first sheet body 2221 and a second sheet body 2222 connected relatively rotatably, one end of the first sheet body 2221 away from the second sheet body 2222 is used for hinged connection with one of the corresponding adjacent two heat dissipation plates 221, and the other end of the first sheet body 2221 away from the second sheet body 2222 is used for hinged connection with the other of the corresponding adjacent two heat dissipation plates 221, so that the corresponding adjacent two heat dissipation plates 221 can move towards or away from each other along a predetermined direction.

[0038] In the heat dissipation device, by using the foldable connecting piece 222 including the first sheet body 2221 and the second sheet body 2222, the foldable connecting piece 222 can be extended or folded, realizing the free conversion of the plurality of heat dissipation plates 221 between the unfolded state and the folded state without complex mechanical structure, simplifying the heat dissipation device and reducing the manufacturing cost and maintenance difficulty.

[0039] Specifically, the relative rotation mechanism of the first sheet body 2221 and the second sheet body 2222 is similar to the extension and folding principle of the accordion, which can ensure that the plurality of heat dissipation plates 221 of the heat dissipation plate assembly 22 form a plurality of heat dissipation intervals when unfolded, and closely fit when folded to reduce the floor area, so that the heat dissipation device can realize the conversion of the heat dissipation mode through simple mechanical action, quickly respond to the change of the heat dissipation demand, and improve the flexibility and response speed of the heat dissipation device.

[0040] As shown in Figures 1 to 4 and Figure 6 The driving assembly 21 includes a driving part 211 and a transmission part 212, the driving body of the driving part 211 is arranged on the liquid cooling plate 11, the driving shaft of the driving part 211 is in transmission connection with the transmission part 212, and the transmission part 212 is in transmission connection with the driving end of the driving assembly 21 and the last one of the plurality of heat dissipation plates 221 to drive the last one of the plurality of heat dissipation plates 221 to move along a predetermined direction.

[0041] In the heat dissipation device, the driving assembly 21 controls the driving part 211 to generate power through the cooperation of the driving part 211 and the transmission part 212, and transmits the power to the heat dissipation plate assembly 22 through the transmission part 212 to realize the unfolding and folding of the heat dissipation plate, so as to realize the accurate control of the heat dissipation plate assembly 22, ensure the stable operation of the heat dissipation plate assembly 22, avoid the jamming or damage of the heat dissipation device during the conversion of the heat dissipation mode, and improve the overall stability and reliability of the heat dissipation device.

[0042] Optionally, the driving part 211 can be a power source in various forms such as a motor or a pneumatic cylinder, and the transmission part can adopt various transmission modes such as gear and rack transmission, chain transmission, belt transmission, and screw nut transmission, so as to adapt to different application scenarios and technical requirements and solve the technical problems of power transmission and control accuracy between the driving part 211 and the heat dissipation plate assembly 22.

[0043] Specifically, the driving part 211 is located on the side away from the last one of the first heat dissipation plate 221, and the transmission part 212 is located at the bottom of the plurality of heat dissipation plates 221. The liquid cooling plate 11 and / or the plurality of heat dissipation plates 221 are provided with a avoiding groove for avoiding the transmission part 212, so that the end of the transmission part 212 away from the driving part 211 is connected with the last one of the plurality of heat dissipation plates 221 after passing through the plurality of heat dissipation plates 221.

[0044] As shown in Figure 7 and Figure 8 , the driving part 211 is a rotary motor; the transmission part 212 includes a gear 2121 and a rack 2122, the rotation axis of the gear 2121 is perpendicular to the predetermined direction, the rack 2122 extends along the predetermined direction, the rack 2122 is engaged with the gear 2121, and one end of the rack 2122 is fixedly connected with the last one of the plurality of heat dissipation plates 221. The rotating shaft of the rotary motor is connected with the gear 2121 to drive the gear 2121 to rotate, so as to drive the last one of the plurality of heat dissipation plates 221 to move through the rack 2122; or a lead screw 2123 and a nut 2124, the lead screw 2123 extends along the predetermined direction, the nut 2124 is sleeved on the lead screw 2123 and is threadedly connected with the lead screw 2123, the nut 2124 is fixedly connected with the last one of the plurality of heat dissipation plates 221, and the rotating shaft of the rotary motor is connected with the lead screw 2123 to drive the lead screw 2123 to rotate, so as to drive the last one of the plurality of heat dissipation plates 221 to move along the lead screw 2123 through the nut 2124.

[0045] In the first embodiment of the heat dissipation device of the present application, a rotary motor is used as the driving source, and through the transmission mode of gear rack or screw nut, the accurate control and stable operation of the heat dissipation plate assembly can be realized. The rotary motion of the rotary motor can be converted into linear motion through the transmission part 212 to drive the switching of the unfolded state and the folded state of the plurality of heat dissipation plates 221. Not only can the quick response of the heat dissipation plate assembly 22 be ensured, but also the smooth transition between the two states can be realized, avoiding the impact and damage caused by sudden action and improving the durability and service life of the heat dissipation device.

[0046] In the first embodiment of the heat dissipation device of the present application, the driving part 211 selects a rotary motor as the power source, and the transmission part 212 skillfully combines the gear 2121 and the rack 2122 to build a set of efficient and reliable drive system. When the temperature of the heat generating part abnormally rises, the rotary motor shaft drives the gear 2121 to rotate. The rotation axis of the gear 2121 is perpendicular to the predetermined direction, and the rack 2122 extends along the predetermined direction and is accurately engaged with the gear 2121. This vertical and horizontal interaction can realize the conversion of the rotary motion of the gear 2121 to the linear motion of the rack 2122. One end of the rack 2122 is firmly connected to the last of the plurality of heat dissipation plates 221. When the gear 2121 rotates, the rack 2122 moves along the predetermined direction, thereby driving the last of the plurality of heat dissipation plates 221 fixedly connected thereto to move. Since the plurality of heat dissipation plates 221 are connected to each other through the plurality of foldable connecting parts 222, this movement of the rack 2122 effectively causes the entire heat dissipation plate assembly 22 to gradually unfold or orderly retract until all the heat dissipation plates 221 are in the most efficient heat dissipation state, forming a dense air-cooled heat dissipation array, ensuring the quick and accurate unfolding or retracting of the plurality of heat dissipation plates 221 in the emergency heat dissipation mode, greatly improving the heat dissipation efficiency, and at the same time maintaining the stability and reliability of the liquid cooling system of the server.

[0047] In the second embodiment of the heat dissipation device of the present application, the driving part 211 selects a rotary motor as a power source, and a transmission part 212 composed of a lead screw 2123 and a nut 2124. The rotary motor directly drives the lead screw 2123 to rotate through its rotating shaft. The rotating movement of the lead screw 2123 can be accurately converted into the linear movement of the nut 2124 along the axis direction of the lead screw 2123. The movement of the nut 2124 will directly drive the last one of the plurality of heat dissipation plates 221 to move. Since the plurality of heat dissipation plates 221 are connected through the plurality of foldable connecting pieces 222, the movement of the last one of the plurality of heat dissipation plates 221 will make all the heat dissipation plates 221 gradually unfold or orderly retract like a stretched accordion, forming a high-efficiency air-cooled heat dissipation array or a compact storage state, adapting to different heat dissipation demand scenarios. This process is efficient and stable, with almost no energy loss, ensuring the rapid and accurate emergency response of the heat dissipation device. The thread cooperation between the lead screw 2123 and the nut 2124 ensures high precision and low wear during transmission. Even in the case of high-speed unfolding or frequent operation, it can also maintain stable driving force, avoiding the misalignment or jamming of the heat dissipation plates caused by transmission deviation, greatly improving the stability and reliability of the heat dissipation device. Moreover, through the linear extension of the lead screw 2123 and the directional movement of the nut 2124, the heat dissipation device can realize the rapid deployment and recovery of the heat dissipation plates 221 without increasing the extra space burden, providing greater flexibility and compactness for the internal layout of servers and other high-performance electronic equipment, which is helpful for the further miniaturization and high-density integration of servers and other devices.

[0048] As shown in Figure 9 , the driving part 211 is a linear motor or a pneumatic cylinder; the transmission part 212 includes a connecting rod 2125 extending along a predetermined direction, and the two ends of the connecting rod 2125 are respectively connected with the piston rod of the linear motor or the pneumatic cylinder and the last one of the plurality of heat dissipation plates 221, so as to drive the last one of the plurality of heat dissipation plates 221 to move under the driving of the piston rod of the linear motor or the pneumatic cylinder.

[0049] In the third embodiment of the heat dissipation device of the present application, by adopting a linear motor or a pneumatic cylinder as a driving source, linear motion can be directly generated. The extension and retraction movement of the piston rod of the linear motor or the pneumatic cylinder can be transmitted to the heat dissipation plate assembly 22 through the connecting rod 2125, realizing the switching between the unfolded state and the retracted state of the plurality of heat dissipation plates 221. Without complex transmission structure, the driving efficiency and response speed are improved, which can ensure the rapid response of the heat dissipation plate assembly 22, especially in the case of emergency heat dissipation, the heat dissipation plates 221 can be quickly unfolded to improve the heat dissipation efficiency.

[0050] In addition, the piston rod of the linear motor or the pneumatic cylinder can also be directly connected with the last one of the plurality of heat dissipation plates 221.

[0051] Specifically, the driving assembly 21 comprises a controller, which is electrically connected with the driving part 211 to control the working state of the driving part 211; the driving assembly 21 further comprises: a temperature sensor, which is arranged on the heat generating member and electrically connected with the controller, for monitoring the real-time temperature of the heat generating member, and transmitting the data of the real-time temperature to the controller after converting the real-time temperature into an electric signal of the real-time temperature, so that the controller controls the working state of the driving part 211 according to the electric signal of the real-time temperature; and / or a first limit sensor, which is arranged on the liquid cooling plate 11 at a first predetermined position and electrically connected with the controller, the first predetermined position being the position of the last one of the plurality of heat dissipation plates 221 when the plurality of heat dissipation plates 221 are in the unfolded state, the first limit sensor transmitting a corresponding first-to-position electric signal to the controller after detecting that the last one of the plurality of heat dissipation plates 221 moves to the position, so that the controller controls the driving part 211 to stop working; and / or a second limit sensor, which is arranged on the liquid cooling plate 11 at a second predetermined position and electrically connected with the controller, the second predetermined position being the position of the last one of the plurality of heat dissipation plates 221 when the plurality of heat dissipation plates 221 are in the folded state, the second limit sensor transmitting a corresponding second-to-position electric signal to the controller after detecting that the last one of the plurality of heat dissipation plates 221 moves to the position, so that the controller controls the driving part 211 to stop working.

[0052] In the heat dissipation device of the present application, by arranging the controller, the temperature sensor and the limit sensor, the heat dissipation mode of the heat dissipation device can be automatically adjusted according to the actual heat dissipation demand, realizing intelligent control and safety protection of the heat dissipation device, avoiding unnecessary energy waste, and ensuring safe operation of the heat dissipation device and preventing damage caused by excessive unfolding or folding.

[0053] In the heat dissipation device of the present application, the temperature sensor integrated in the driving assembly 21 significantly improves the intelligence and response speed of the heat dissipation device in heat dissipation management. Specifically, the temperature sensor is directly arranged on the heat generating component, which ensures direct and accurate temperature monitoring of the heat generating component including the CPU and other key components. Any slight temperature change can be captured in real time, and through the electrical connection with the controller, the temperature sensor can quickly convert the measured real-time temperature data into an electrical signal without complex intermediate links, directly and efficiently transmitting it to the controller. This feature enables the controller to monitor the temperature state of the heat generating component in real time, intelligently determine whether to start the emergency air cooling function, and the specific time point and duration of the start, thereby accurately controlling the operating state of the driving part 211. When the temperature sensor detects that the real-time temperature of the CPU abnormally rises, the controller responds immediately and activates the driving part 211 to quickly deploy the multiple heat dissipation plates 221 of the heat dissipation plate assembly 22, achieving timely heat dissipation; on the contrary, when the CPU temperature drops to the safe range, the controller activates the driving part 211 in time to retract the multiple heat dissipation plates 221 of the heat dissipation plate assembly 22, reducing unnecessary energy consumption. This not only optimizes the energy consumption management of the heat dissipation device and avoids resource waste caused by excessive heat dissipation, but also realizes dynamic adjustment of the heat dissipation strategy, enhances the system's response to sudden overheating conditions, and effectively ensures the stable operation of electronic equipment such as servers and the safety of key components.

[0054] In the heat dissipation device of the present application, by introducing the first and second limit sensors, important safety protection and fine control capability are added to the air-cooled heat dissipation part 2 of the heat dissipation device; among them, the first limit sensor is ingeniously arranged at the first predetermined position on the liquid cooling plate 11, ensuring that when the multiple heat dissipation plates 221 are in the deployed state and reach the maximum heat dissipation area state, the last one of the multiple heat dissipation plates 221 is in contact with the first limit sensor. Through electrical connection with the controller, the first limit sensor can immediately send a first to-position electrical signal to the controller at the moment when the last one of the multiple heat dissipation plates 221 moves into position, to immediately trigger the controller to control the driving part 211 to stop working; the second limit sensor is ingeniously arranged at the second predetermined position on the liquid cooling plate 11, ensuring that when the multiple heat dissipation plates 221 are in the retracted state and reach the minimum heat dissipation area state, the last one of the multiple heat dissipation plates 221 is in contact with the second limit sensor. Through electrical connection with the controller, the second limit sensor can immediately send a second to-position electrical signal to the controller at the moment when the last one of the multiple heat dissipation plates 221 moves into position, to immediately trigger the controller to control the driving part 211 to stop working.

[0055] In this way, the accurate positioning of the first and second limit sensors effectively prevents the heat dissipation plates from exceeding the predetermined position during the unfolding or folding process, avoids the waste of space or physical interference with other internal components caused by excessive unfolding or folding, and ensures the rationality of the internal layout of the heat dissipation device and the safety of the operation of the server and other equipment. When the multiple heat dissipation plates 221 reach the unfolded or folded state, the controller immediately responds to the first or second arrival electrical signal and stops driving, not only saving power consumption, but more importantly, avoiding the possible deformation of the heat dissipation plate structure or wear of the connecting part caused by the continuous force of the driving assembly, enhancing the stability and durability of the entire heat dissipation device, achieving automatic monitoring and intelligent management of the unfolding or folding process of the multiple heat dissipation plates 221, ensuring the accurate execution of the heat dissipation strategy, improving the intelligence level of electronic equipment in heat management, avoiding the idling or overload operation of the driving part 211 when the heat dissipation plates do not need to continue to move, effectively prolonging the service life of the driving assembly 21 and reducing maintenance costs.

[0056] As shown in Figures 1 to 4 and Figure 6 , the liquid cooling plate 11 is a rectangular plate, the predetermined direction is parallel to the liquid cooling plate 11; the heat dissipation plate 221 is a rectangular plate, the heat dissipation plate 221 is perpendicular to the liquid cooling plate 11 and perpendicular to the predetermined direction; and / or, the liquid cooling heat dissipation part 1 further comprises a heat conduction layer, the liquid cooling plate 11 is provided with a positioning groove for mounting the heat conduction layer, and the liquid cooling plate 11 is in contact with the heat dissipation plate assembly 22 through the heat conduction layer; and / or, the air-cooled heat dissipation part 2 further comprises a plurality of magnetic attraction members, each heat dissipation plate 221 is provided with magnetic attraction members on opposite sides, and the magnetic properties of the magnetic attraction members on the first side of each heat dissipation plate 221 are opposite to those on the second side of each heat dissipation plate 221; and / or, the number of driving assemblies 21 is multiple, and the number of heat dissipation plate assemblies 22 is also multiple, and the multiple driving assemblies 21 and the multiple heat dissipation plate assemblies 22 are one-to-one drivingly connected.

[0057] In the heat dissipation device of the present application, the shape and position of the liquid cooling plate 11 and the heat dissipation plate 221 are set so that the heat dissipation plate assembly is tightly attached to the liquid cooling plate 11 in the folded state, without occupying additional space, and at the same time in the unfolded state, the heat dissipation plate 221 is perpendicular to the liquid cooling plate, ensuring the heat exchange effect between the liquid cooling plate 11 and the heat dissipation plate 221, forming an effective heat dissipation surface, increasing the contact area with air, and improving the air-cooled heat dissipation efficiency; the shape of the rectangular plate facilitates the arrangement and unfolding of the heat dissipation plate assembly, and the perpendicular arrangement to the liquid cooling plate is conducive to forming a stable air duct, accelerating the dissipation of heat, and ensuring efficient air-cooled heat dissipation in a limited space. In particular, in the case of liquid cooling heat dissipation failure or a sharp increase in heat dissipation demand, the rapidly unfolded heat dissipation plate assembly 22 can timely supplement the heat dissipation capacity, avoiding server overheating.

[0058] In the heat dissipation device of the present application, the heat-conducting layer is made of a high-thermal-conductivity elastic material, such as heat-conducting silica gel, and can further improve its thermal conductivity by adding high-thermal-conductivity fillers, such as nano-sized metal powder, in the elastic material through a special process. At least part of the elastic heat-conducting layer is embedded in the positioning groove. When the plurality of heat dissipation plates 221 are unfolded, the heat-conducting layer closely adheres to the liquid cooling plate 11 and the plurality of heat dissipation plates 221 by virtue of its elasticity, greatly reducing the thermal resistance of the contact surface between the liquid cooling plate 11 and the heat dissipation plate assembly 22, ensuring that heat can be quickly and efficiently transferred from between the liquid cooling plate 11 and the plurality of heat dissipation plates 221, and then dissipated through the air, thereby ensuring the heat dissipation efficiency of the electronic device during the emergency heat dissipation process, and significantly optimizing the heat conduction efficiency and structural stability between liquid cooling and air cooling. When the performance of the heat-conducting layer decreases or needs to be replaced with a higher-performance material, it can be replaced simply without replacing the entire heat dissipation device, greatly reducing maintenance costs and upgrade difficulty.

[0059] In the heat dissipation device of the present application, the edges of the plurality of heat dissipation plates 221 are provided with magnetic strips, and the magnetic strips of adjacent two heat dissipation plates 221 are opposite in polarity and are arranged opposite to each other. When the plurality of heat dissipation plates 221 are in the folded state, the magnetic strips of adjacent two heat dissipation plates 221 attract each other, causing the plurality of heat dissipation plates 221 to closely adhere to each other and prevent shaking. After the plurality of heat dissipation plates 221 are unfolded, the attractive force of the magnetic strips helps maintain the stable structure of the fin array, avoiding displacement of the heat dissipation plates 221 due to air flow impact, significantly enhancing the structural stability of the heat dissipation device, reducing the risk of increased thermal resistance and reduced heat dissipation efficiency due to loosening or displacement of the heat dissipation plates 221, and promoting the smoothness of the heat dissipation plate assembly 22 during unfolding and folding. In the unfolding process, the natural repulsion effect of the magnetic force helps the plurality of heat dissipation plates 221 quickly separate, accelerating the formation process of the air-cooled heat dissipation array. When in the folded state, the attractive force of the opposite magnetic poles assists the heat dissipation plates to quickly adhere and stabilize, reducing the load time of the driving assembly 21, and improving the response speed and overall efficiency of the heat dissipation device.

[0060] In the heat dissipation device of the application, the driving assembly 21 and the heat dissipation plate assembly 22 adopt one-to-one driving connection mode, and the number of the two is matched, each driving assembly 21 independently controls the corresponding heat dissipation plate assembly 22, and can dynamically adjust the unfolding and folding of each heat dissipation plate assembly according to the temperature changes of different areas and different time of CPU or other heat generating elements, realizes the targeted cooling of local hot spots, improves the flexibility and effectiveness of the heat dissipation strategy; The parallel work of multiple driving assemblies greatly shortens the time interval from detecting real-time temperature abnormally rising to unfolding the corresponding heat dissipation plate 221, makes the emergency heat dissipation reaction more rapid, and simplifies the complexity of transmission path and mechanical linkage, reduces the loss in the process of energy transmission, so that the operation efficiency of the air cooling heat dissipation part 2 is significantly improved; One-to-one driving connection reduces the possibility of mutual interference between the heat dissipation plate assemblies 22, each assembly can work independently, even if a driving assembly fails, it will not affect the normal work of other assemblies, enhances the redundancy and stability of the heat dissipation device, facilitates troubleshooting and maintenance, reduces repair time and cost, improves the reliability of the heat dissipation device, and can realize fine management of internal heat source distribution of the equipment without increasing additional space burden, the heat dissipation device can intelligently open or close specific heat dissipation plate assemblies 22 according to actual heat dissipation demand, realize fine control of energy consumption, and avoid resource waste caused by excessive cooling.

[0061] As shown in Figures 1 to 4 and Figure 6 The liquid cooling plate 11 has a refrigerant containing cavity, and a refrigerant inlet and a refrigerant outlet respectively communicating with the refrigerant containing cavity; wherein the refrigerant inlet and the refrigerant outlet are respectively located on the opposite sides of the air cooling heat dissipation part 2.

[0062] In the heat dissipation device of the application, the above-mentioned setting of the liquid cooling plate 11 can ensure the smoothness of the refrigerant circulation path of the liquid cooling heat dissipation part 1, and at the same time can facilitate the better heat exchange between the refrigerant in the liquid cooling plate 11 and the air cooling heat dissipation part 2, optimize the structure of the heat dissipation device, the refrigerant enters from the refrigerant inlet, flows out from the refrigerant outlet after passing through the refrigerant containing cavity, forming a closed circulation path, which can effectively absorb and transfer the heat generated by the heat generating element, improve the efficiency of liquid cooling, at the same time guarantee the normal operation of the air cooling heat dissipation part, realize the effective combination of liquid cooling and air cooling heat dissipation mode. In addition, the positions of the refrigerant inlet and the refrigerant outlet can be adjusted according to actual needs, such as being arranged on the same side of the air cooling heat dissipation part 2, etc., to adapt to the internal layout of different servers and other equipment, solve the technical problem of reasonable arrangement of heat dissipation path in limited space.

[0063] As shown in Figures 1 to 4 and Figure 6As shown, the liquid cooling heat dissipation part 1 further comprises: a refrigerant inlet pipe 12, the outlet of the refrigerant inlet pipe 12 is connected with the refrigerant inlet, and the inlet of the refrigerant inlet pipe 12 is used to be connected with the outlet of the refrigerant supply device; a refrigerant outlet pipe 13, the inlet of the refrigerant outlet pipe 13 is connected with the refrigerant outlet, and the outlet of the refrigerant outlet pipe 13 is used to be connected with the outlet of the refrigerant supply device; wherein the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 extend along a predetermined direction.

[0064] In the heat dissipation device of the present application, the liquid cooling heat dissipation part 1 is connected with the external refrigerant supply device by setting the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13, which ensures the smooth circulation of the refrigerant and ensures the efficient operation of the liquid cooling heat dissipation part 1. At the same time, the design of the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 extending along a predetermined direction makes the volume occupied by the heat dissipation device smaller, reduces the occupation of the internal space of the server and other equipment, and improves the integration and heat dissipation efficiency of the server and other equipment. In addition, the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 can be made of different materials and shapes, such as hoses or pipes, to adapt to different application scenarios and heat dissipation requirements, and to solve the technical problem of optimizing the refrigerant circulation path under different conditions.

[0065] The present application also provides a server, comprising: a server body and a heat generating component arranged in the server body; the heat dissipation device described above is arranged in the interior of the server body and in contact with the heat generating component to dissipate heat from the heat generating component.

[0066] The server of the present application integrates the heat dissipation device described above into the interior of the server body, and the heat dissipation device automatically adjusts the heat dissipation mode according to the temperature change of the heat generating component, realizes efficient heat dissipation of the heat generating component, ensures the stability and safety of the server under high load operation, can significantly improve the heat dissipation performance of the server, prolong the service life of the server, and at the same time, through intelligent control, reduces its operation and maintenance cost and energy consumption. In addition, the heat dissipation device of the present application can also be applied to other high-performance computing devices or electronic devices other than servers to solve the heat dissipation problem under high heat flux density conditions.

[0067] The working process of the server of the present application is as follows:

[0068] In the working process, when the server is in normal operation, the liquid cooling heat dissipation part 1 dissipates heat through the refrigerant circulation, and the multiple heat dissipation plates 221 of the heat dissipation plate assembly 22 of the air cooling heat dissipation part 2 are in the retracted state and do not occupy extra space; when the server load increases suddenly or the liquid cooling system fails, the temperature sensor detects that the real-time temperature of the heat generating part rises, and after the controller receives the electric signal of the real-time temperature sent by the temperature sensor, the driving assembly 21 is started to drive the multiple heat dissipation plates 221 to move to the unfolded state in the predetermined direction to perform air cooling heat dissipation surface and accelerate the dissipation of heat; in the unfolding process of the multiple heat dissipation plates 221, when the last one of the multiple heat dissipation plates 221 contacts the first limit sensor, the first limit sensor transmits the corresponding first to position electric signal to the controller, and the controller controls the driving part 211 of the driving assembly 21 to stop working.

[0069] With the gradual decrease of the temperature of the heat generating part, when the temperature decreases to the preset threshold value, the controller controls the driving assembly to stop working, and the multiple heat dissipation plates 221 are retracted under the reverse action of the driving assembly 21, and return to the retracted state, which does not interfere with the normal operation of the server, at this time the liquid cooling heat dissipation part 1 continues to undertake the main heat dissipation task and does not interfere with the normal operation of the server; in the retraction process of the multiple heat dissipation plates 221, when the last one of the multiple heat dissipation plates 221 contacts the second limit sensor, the second limit sensor transmits the corresponding second to position electric signal to the controller, and the controller controls the driving part 211 of the driving assembly 21 to stop working.

[0070] The above describes in detail the heat dissipation device and the server provided by the application. The principles and implementation modes of the application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the method of the application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A heat dissipation device, characterized in that: include: A liquid cooling heat dissipation portion (1) comprising a liquid cooling plate (11) for contacting a heating element to dissipate heat from the heating element; The air-cooled heat dissipation part (2) comprises a driving assembly (21) and a heat dissipation plate assembly (22) arranged on the liquid cooling plate (11), wherein the heat dissipation plate assembly (22) comprises a plurality of heat dissipation plates (221) and a plurality of foldable connectors (222), wherein the plurality of heat dissipation plates (221) are sequentially arranged at intervals along a predetermined direction, and each of the foldable connectors (222) is arranged to be stretchable or foldable along the predetermined direction, and any two adjacent heat dissipation plates (221) are connected by at least one of the plurality of foldable connectors (222). A connection is provided so that the plurality of heat dissipation plates (221) have an expanded state when the plurality of foldable connecting members (222) are all extended and a retracted state when the plurality of foldable connecting members (222) are all folded; wherein the liquid cooling plate (11) is fixedly connected to a first one of the plurality of heat dissipation plates (221), and a driving end of the driving assembly (21) is drivingly connected to a last one of the plurality of heat dissipation plates (221) so that the plurality of heat dissipation plates (221) can be switched between the expanded state and the retracted state.

2. The heat dissipation device according to claim 1, characterized in that: The foldable connecting member (222) comprises at least a first sheet (2221) and a second sheet (2222) which are connected in a relatively rotatable manner, wherein one end of the first sheet (2221) away from the second sheet (2222) is used for hinge connection with one of the two adjacent heat dissipation plates (221), and the other end of the first sheet (2221) away from the second sheet (2222) is used for hinge connection with the other of the two adjacent heat dissipation plates (221), so that the two adjacent heat dissipation plates (221) can move toward or away from each other along the predetermined direction.

3. The heat dissipation device according to claim 1, wherein: The driving assembly (21) comprises a driving part (211) and a transmission part (212), wherein a driving body of the driving part (211) is arranged on the liquid cooling plate (11), a driving shaft of the driving part (211) is in transmission connection with the transmission part (212), and the transmission part (212) is in transmission connection with a driving end of the driving assembly (21) and the last one of the plurality of heat dissipation plates (221) so as to drive the last one of the plurality of heat dissipation plates (221) to move in a predetermined direction.

4. The heat dissipation device according to claim 3, characterized in that: The driving part (211) is a rotating motor; the transmission part (212) comprises: a gear (2121) and a rack (2122), wherein the rotation axis of the gear (2121) is perpendicular to the predetermined direction, the rack (2122) extends along the predetermined direction, the rack (2122) and the gear (2121) are meshed with each other, and one end of the rack (2122) is fixedly connected to the last one of the plurality of heat dissipation plates (221), and the rotating shaft of the rotating motor is connected to the gear (2121) to drive the gear (2121) to rotate, so as to drive the last one of the plurality of heat dissipation plates (221) to move via the rack (2122); or, A lead screw (2123) and a nut (2124), wherein the lead screw (2123) extends along the predetermined direction, the nut (2124) is sleeved on the lead screw (2123) and threadedly connected to the lead screw (2123), the nut (2124) is fixedly connected to the last one of the plurality of heat dissipation plates (221), and the rotating shaft of the rotating motor is connected to the lead screw (2123) to drive the lead screw (2123) to rotate, so as to drive the last one of the plurality of heat dissipation plates (221) to move along the lead screw (2123) through the nut (2124).

5. The heat dissipation device according to claim 3, characterized in that: The driving part (211) is a linear motor or a cylinder; The transmission part (212) includes a connecting rod (2125), the connecting rod (2125) extending along the predetermined direction, and the two ends of the connecting rod (2125) are respectively connected to the piston rod of the linear motor or the cylinder and the last one of the multiple heat dissipation plates (221), so as to drive the last one of the multiple heat dissipation plates (221) to move under the drive of the piston rod of the linear motor or the cylinder.

6. The heat dissipation device according to claim 3, characterized in that: The driving component (21) includes a controller, the controller being electrically connected to the driving part (211) to control the working state of the driving part (211); the driving component (21) also includes: a temperature sensor, the temperature sensor being arranged on the heating element and electrically connected to the controller, for monitoring the real-time temperature of the heating element, and converting the real-time temperature data into an electrical signal of the real-time temperature and transmitting the signal to the controller, so that the controller controls the working state of the driving part (211) according to the electrical signal of the real-time temperature; and / or, a first limit sensor, the first limit sensor being arranged at a first predetermined position on the liquid cooling plate (11) and being electrically connected to the controller, the first predetermined position being the position of the last one of the plurality of heat dissipating plates (221) when the plurality of heat dissipating plates (221) are in the unfolded state, the first limit sensor transmitting a corresponding first in-position electrical signal to the controller after detecting that the last one of the plurality of heat dissipating plates (221) has moved into position, so that the controller controls the driving unit (211) to stop working; and / or, A second limit sensor is provided at a second predetermined position on the liquid cooling plate (11) and is electrically connected to the controller, the second predetermined position being the position of the last one of the plurality of heat dissipation plates (221) when the plurality of heat dissipation plates (221) are in the retracted state, and the second limit sensor transmits a corresponding second in-position electrical signal to the controller after detecting that the last one of the plurality of heat dissipation plates (221) has moved into position, so that the controller controls the driving unit (211) to stop working.

7. The heat dissipation device according to claim 1, wherein: The liquid cooling plate (11) is a rectangular plate, and the predetermined direction is parallel to the liquid cooling plate (11); the heat dissipation plate (221) is a rectangular plate, and the heat dissipation plate (221) is perpendicular to the liquid cooling plate (11) and perpendicular to the predetermined direction; and / or, The liquid cooling heat dissipation portion (1) further comprises a heat conducting layer, a positioning groove for mounting the heat conducting layer is provided on the liquid cooling plate (11), and the liquid cooling plate (11) contacts the heat dissipation plate assembly (22) via the heat conducting layer; and / or, The air-cooled heat dissipation portion (2) further comprises a plurality of magnetic elements, wherein the magnetic elements are provided on opposite sides of each heat dissipation plate (221), and the magnetic properties of the magnetic elements on the first side of each heat dissipation plate (221) are opposite to the magnetic properties of the magnetic elements on the second side of each heat dissipation plate (221); and / or, There are multiple drive assemblies (21), and there are multiple heat sink assemblies (22). The multiple drive assemblies (21) are driven and connected to the multiple heat sink assemblies (22) in a one-to-one correspondence.

8. The heat dissipation device according to claim 1, wherein: The liquid cooling plate (11) has a refrigerant accommodating cavity and a refrigerant inlet and a refrigerant outlet respectively connected to the refrigerant accommodating cavity; wherein the refrigerant inlet and the refrigerant outlet are respectively located on opposite sides of the air-cooled heat dissipation portion (2).

9. The heat dissipation device according to claim 8, characterized in that: The liquid cooling heat dissipation unit (1) further includes: A refrigerant inlet pipe (12), the outlet of the refrigerant inlet pipe (12) being connected to the refrigerant inlet, and the inlet of the refrigerant inlet pipe (12) being used to be connected to the outlet of a refrigerant supply device; A refrigerant outlet pipe (13), the inlet of the refrigerant outlet pipe (13) is connected to the refrigerant outlet, and the outlet of the refrigerant outlet pipe (13) is used to be connected to the outlet of the refrigerant supply device; Wherein, the refrigerant inlet pipe (12) and the refrigerant outlet pipe (13) both extend along the predetermined direction.

10. A server, characterized in that: include: A server body and a heat generating element disposed in the server body; The heat dissipation device according to any one of claims 1 to 9 is arranged inside the server body and in contact with the heat generating component to dissipate heat from the heat generating component.

Images