Combined heat dissipation system and server

Abstract

The invention relates to a combined heat dissipation system and a server. The combined heat dissipation system comprises an oil tank, a heat exchanger, a pump, a fan, a first temperature detection device and a controller, the oil tank, the heat exchanger and the pump can achieve liquid cooling circulation, and under the condition that the controller receives that the actual temperature of a heat dissipation area of a device to be cooled is higher than the starting temperature, the controller can start the pump; the heat dissipation area is cooled through liquid cooling circulation; after the pump is started, the controller can adjust the output flow of the pump according to the actual temperature, so that the cooling amount of liquid cooling circulation is matched with the heating amount of the heat dissipation area; when the actual temperature received by the controller is higher than the safe temperature, the controller can start the fan to cool the heat exchanger and the pump.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a combined heat dissipation system and a server. Background Art

[0002] With the innovation and development of technologies such as artificial intelligence, big data, and blockchain, especially the promotion and development of technologies such as ChatGPT (ChatGenerative Pre-trained Transformer), the demand for data resources in storage, computing, and application has expanded rapidly, which has led to the implementation of high-power servers such as artificial intelligence computing power. The demand for such high-power servers in various industries is growing, and the power consumption of various electronic components in high-power servers is also increasing. Traditional heat dissipation methods can no longer meet the heat dissipation requirements of such high-power servers. Summary of the invention

[0003] Based on this, it is necessary to provide a combined cooling system and server that can meet the cooling requirements of high-power servers.

[0004] In a first aspect, a combined heat dissipation system is provided, comprising:

[0005] An oil tank, one surface of which at least covers the heat dissipation area of ​​the device to be cooled;

[0006] A heat exchanger, wherein a liquid inlet of the heat exchanger is connected to a liquid outlet of the oil tank;

[0007] A pump, wherein a liquid inlet of the pump is connected to a liquid outlet of the heat exchanger, and a liquid outlet of the pump is connected to a liquid inlet of the oil tank;

[0008] Fan, the fan's blowing area includes the area where the heat exchanger and pump are located;

[0009] A first temperature detection device, the first temperature detection device is used to detect the actual temperature of the heat dissipation area of ​​the heat dissipation device;

[0010] A controller, the controller is respectively connected to each first temperature detection device, the pump and the fan; the controller is used to receive the actual temperature, and start the pump when the actual temperature is higher than the starting temperature; the controller is also used to adjust the output flow of the pump according to the actual temperature, and the controller is also used to start the fan when the actual temperature is higher than the safety temperature to cool the heat exchanger and the pump;

[0011] Among them, the starting temperature is lower than the safety temperature.

[0012] In one of the embodiments, the controller is further configured to increase the speed of the fan when the actual temperature is higher than the temperature threshold;

[0013] Among them, the temperature threshold is greater than the safe temperature.

[0014] In one embodiment, the combined cooling system further comprises:

[0015] An alarm module, the alarm module is connected to the controller;

[0016] The controller is also used to drive the alarm module to perform an alarm action when the actual temperature continues to be higher than the temperature threshold within a preset time.

[0017] In one embodiment, the combined cooling system further comprises:

[0018] A second temperature sensor, the second temperature sensor is used to detect the ambient temperature of the device to be cooled;

[0019] The controller is connected to the second temperature sensor, and the controller is also used to receive and adjust the start temperature, the safety temperature and the temperature threshold according to the ambient temperature;

[0020] Among them, the ambient temperature is positively correlated with the startup temperature, safety temperature and temperature threshold.

[0021] In one embodiment, the pipe connecting the oil tank and the heat exchanger, and the pipe connecting the oil tank and the pump are smooth transparent pipes.

[0022] In a second aspect, a server is provided, including:

[0023] A casing having a receiving space;

[0024] A mainboard, the mainboard having at least one cold plate, and the mainboard is arranged in the accommodating space;

[0025] The combined cooling system includes the following components arranged in the accommodation space:

[0026] An oil tank, one surface of which covers at least the area where the cold plate is located;

[0027] A heat exchanger, wherein a liquid inlet of the heat exchanger is connected to a liquid outlet of the oil tank;

[0028] A pump, wherein a liquid inlet of the pump is connected to a liquid outlet of the heat exchanger, and a liquid outlet of the pump is connected to a liquid inlet of the oil tank;

[0029] Fan, the fan's blowing area includes the area where the heat exchanger and pump are located;

[0030] A first temperature detection device, the first temperature detection device is used to detect the actual temperature of the cold plate;

[0031] A controller, the controller is respectively connected to each first temperature detection device, the pump and the fan; the controller is used to receive the actual temperature, and start the pump when the actual temperature is higher than the starting temperature; the controller is also used to adjust the output flow of the pump according to the actual temperature, and the controller is also used to start the fan when the actual temperature is higher than the safety temperature to cool the heat exchanger and the pump;

[0032] Among them, the starting temperature is lower than the safety temperature.

[0033] In one of the embodiments, the server further includes a hard disk and a power supply, and one surface of the oil tank also covers an area where the hard disk and the power supply are located.

[0034] In one of the embodiments, the controller is further configured to increase the speed of the fan when the actual temperature is higher than a temperature threshold; wherein the temperature threshold is greater than a safety temperature.

[0035] In one embodiment, the combined cooling system further comprises:

[0036] A second temperature sensor, the second temperature sensor is arranged on the outer wall of the housing and is used to detect the ambient temperature of the server;

[0037] The controller is connected to the second temperature sensor, and the controller is also used to receive and adjust the start temperature, the safety temperature and the temperature threshold according to the ambient temperature;

[0038] Among them, the ambient temperature is positively correlated with the startup temperature, safety temperature and temperature threshold.

[0039] In one embodiment, the heat exchanger, pump and fan are located on one side of the motherboard and are arranged close to the cold plate.

[0040] The above-mentioned combined cooling system and server include an oil tank, a heat exchanger, a pump, a fan, a first temperature detection device and a controller, wherein the oil tank, the heat exchanger and the pump can realize a liquid cooling cycle. When the controller receives that the actual temperature of the cooling area of ​​the device to be cooled is higher than the starting temperature, the controller can turn on the pump to cool down the cooling area through the liquid cooling cycle; after turning on the pump, the controller can also adjust the output flow of the pump according to the actual temperature so that the cooling amount of the liquid cooling cycle matches the heating amount of the cooling area; when the actual temperature received by the controller is higher than the safe temperature, the controller can turn on the fan to cool down the heat exchanger and the pump. Therefore, the above-mentioned combined cooling system can adjust the cooling amount according to the heating amount of the device to be cooled. Compared with the traditional single cooling method, this combined cooling system can meet the cooling requirements of both low-power servers and high-power servers at the same time, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 One of the structural block diagrams of a combined heat dissipation system according to an embodiment;

[0043] Figure 2 This is a second structural block diagram of a combined heat dissipation system according to an embodiment;

[0044] Figure 3 A structural block diagram of a server according to an embodiment. DETAILED DESCRIPTION

[0045] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0047] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first temperature sensor may be referred to as a second temperature sensor, and similarly, a second temperature sensor may be referred to as a first temperature sensor. Both the first temperature sensor and the second temperature sensor are temperature sensors, but they are not the same temperature sensor.

[0048] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0049] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0050] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0051] In one embodiment, Figure 1 As shown, a combined cooling system 10 is provided, including: an oil tank 102 , a heat exchanger 104 , a pump 106 , a fan 108 , a first temperature detection device 110 and a controller 112 .

[0052] One surface of the oil tank 102 at least covers the heat dissipation area of ​​the device to be cooled.

[0053] The liquid inlet of the heat exchanger 104 is in communication with the liquid outlet of the oil tank 102 .

[0054] The liquid inlet of the pump 106 is communicated with the liquid outlet of the heat exchanger 104 , and the liquid outlet of the pump 106 is communicated with the liquid inlet of the oil tank 102 .

[0055] The blowing area of ​​the fan 108 includes the area where the heat exchanger 104 and the pump 106 are located.

[0056] The first temperature detection device 110 is used to detect the actual temperature of the heat dissipation area of ​​the heat dissipation device.

[0057] The controller 112 is respectively connected to the first temperature detection devices 110, the pump 106 and the fan 108; the controller 112 is used to receive the actual temperature and start the pump 106 when the actual temperature is higher than the starting temperature; the controller 112 is also used to adjust the output flow of the pump 106 according to the actual temperature. The controller 112 is also used to start the fan 108 when the actual temperature is higher than the safety temperature to cool down the heat exchanger 104 and the pump 106.

[0058] Among them, the starting temperature is lower than the safety temperature.

[0059] The liquid cooling oil in the oil tank 102 exchanges heat with the heat dissipation area and flows into the heat exchanger 104, where it is cooled. The cooled heat exchanger 104 is pumped by the pump 106 and then flows into the oil tank 102, thereby cooling the oil through a liquid cooling cycle.

[0060] When the actual temperature in the heat dissipation area is higher than the starting temperature, it is characterized by the liquid cooling oil in the oil tank 102 having been heated to a temperature that needs to be cooled, that is, the heat dissipation area needs to be cooled. At this time, the controller 112 can start the above-mentioned liquid cooling cycle by turning on the pump 106, so as to achieve cooling by means of the liquid cooling oil taking away the heat in the heat dissipation area. When the actual temperature of the heat dissipation area is higher than the starting temperature and lower than the safe temperature, the controller 112 can adjust the output flow of the pump 106 according to the actual temperature; specifically, as the actual temperature increases, the output flow of the pump 106 is gradually increased to promote the liquid cooling cycle; as the actual temperature decreases, the output flow of the pump 106 is gradually reduced to reduce energy waste. When the actual temperature of the heat dissipation area is higher than the safety temperature, it is characterized by the cooling rate of the liquid cooling oil in the oil tank 102 being lower than the heating rate of the heat dissipation area. At this time, the controller 112 turns on the fan 108. Since the blowing area of ​​the fan 108 includes the area where the heat exchanger 104 and the pump 106 are located, after turning on the fan 108, the fan 108 can cool down the heat exchanger 104 and the pump 106, thereby assisting in cooling the liquid cooling oil.

[0061] The above-mentioned combined cooling system 10 includes an oil tank 102, a heat exchanger 104, a pump 106, a fan 108, a first temperature detection device 110 and a controller 112, wherein the oil tank 102, the heat exchanger 104 and the pump 106 can realize a liquid cooling cycle. When the controller 112 receives that the actual temperature of the cooling area of ​​the device to be cooled is higher than the start-up temperature, the controller 112 can start the pump 106 to cool the cooling area through the liquid cooling cycle; after starting the pump 106, the controller 112 can also adjust the output flow of the pump 106 according to the actual temperature, so that the cooling amount of the liquid cooling cycle matches the heating amount of the cooling area; when the actual temperature received by the controller 112 is higher than the safety temperature, the controller 112 can start the fan 108 to cool the heat exchanger 104 and the pump 106. Therefore, the above-mentioned combined cooling system 10 can adjust the cooling amount according to the heating amount of the device to be cooled. Compared with the traditional single cooling method, this combined cooling system 10 can simultaneously meet the cooling requirements of low-power servers and high-power servers, and has a wide range of applications.

[0062] In one embodiment, the controller 112 is further configured to increase the speed of the fan 108 when the actual temperature is higher than the temperature threshold.

[0063] Among them, the temperature threshold is greater than the safe temperature.

[0064] When the actual temperature of the heat dissipation area is higher than the temperature threshold, it is characterized by that the cooling by the fan 108 blowing air to the heat exchanger 104 and the pump 106, and the liquid cooling cycle formed by the oil tank 102, the heat exchanger 104 and the pump 106 can no longer meet the current heat dissipation requirements. At this time, auxiliary cooling can be achieved by increasing the speed of the fan 108.

[0065] Furthermore, a plurality of different temperature thresholds may be set to achieve step-by-step heat dissipation regulation.

[0066] In one embodiment, after the fan 108 is turned on, the controller 112 is further configured to adjust the speed of the fan 108 according to the actual temperature.

[0067] Specifically, after the fan 108 is turned on, the controller 112 can increase the speed of the fan 108 until the maximum speed of the fan 108 is reached when the actual temperature rises; the controller 112 can also decrease the speed of the fan 108 until the fan 108 is turned off when the actual temperature drops. When the fan 108 is turned off, it is characterized by the actual temperature at this time falling back to a range below the safe temperature.

[0068] In one embodiment, Figure 2 As shown, the combined cooling system 10 further includes: an alarm module 114 .

[0069] The alarm module 114 is connected to the controller 112 .

[0070] The controller 112 is further configured to drive the alarm module 114 to perform an alarm action when the actual temperature continues to be higher than the temperature threshold within a preset time.

[0071] The preset time can be determined according to the heat dissipation capacity of the combined heat dissipation system 10. Specifically, if the combined heat dissipation system 10 can reduce the actual temperature to a range below the temperature threshold within 10 minutes when the actual temperature is higher than the temperature threshold, the preset time can be set to 10 minutes, 12 minutes or 15 minutes accordingly. Of course, the specific values ​​of the above preset time are only examples and are not intended to be limiting. The preset time can be determined as 5 minutes, 10 minutes, 1 hour, 5 hours, etc. according to the actual heat dissipation capacity of the combined heat dissipation system 10. Of course, the preset time can also be determined according to the actual heat dissipation requirements and the device performance of the combined heat dissipation system 10.

[0072] The fact that the actual temperature is continuously higher than the temperature threshold value indicates that the combined heat dissipation system 10 is unable to reduce the actual temperature of the heat dissipation area of ​​the device to be cooled to a safe and reasonable temperature range, which poses a safety hazard.

[0073] The alarm module 114 can remind the staff through sound and light alarms, and can also transmit the temperature information at this time to the terminal device, so that the staff can obtain the information "the actual temperature continues to be higher than the temperature threshold" through the pop-up window of the terminal device, so that the staff can take corresponding measures in time when the actual temperature continues to be higher than the temperature threshold.

[0074] In one embodiment, Figure 2 As shown, the combined heat dissipation system 10 further includes: a second temperature sensor 116 .

[0075] The second temperature sensor 116 is used to detect the ambient temperature of the device to be cooled.

[0076] The controller 112 is connected to the second temperature sensor 116 , and the controller 112 is further configured to receive and adjust the start-up temperature, the safety temperature, and the temperature threshold according to the ambient temperature.

[0077] Among them, the ambient temperature is positively correlated with the startup temperature, safety temperature and temperature threshold.

[0078] The higher the ambient temperature of the heat dissipation device, the higher the startup temperature, the safety temperature and the temperature threshold can be adjusted accordingly to avoid repeatedly starting the pump 106 and the fan 108 and extend the service life of the combined heat dissipation system 10.

[0079] In one embodiment, the pipes connecting the oil tank 102 and the heat exchanger 104 and the pipes connecting the oil tank 102 and the pump 106 are smooth transparent pipes.

[0080] The smooth transparent tube can reduce the flow resistance of the liquid cooling oil, making the liquid cooling oil flow more smoothly in the pipeline, thereby improving the cooling efficiency of the combined cooling system 10; the smooth transparent tube can also reduce the allowable noise of the combined cooling system 10, thereby achieving silent operation.

[0081] Through the smooth transparent tube, the staff can directly observe the flow of the liquid cooling oil, and thus quickly judge the flow rate, bubbles and other conditions of the liquid cooling oil, so as to locate the fault position in time when the liquid cooling oil leaks, blocks, deteriorates and other faults occur.

[0082] In one embodiment, Figure 3 As shown, a server 20 is provided, including: a casing 202 , a mainboard 204 and a combined cooling system 10 .

[0083] The housing 202 has a receiving space.

[0084] The mainboard 204 has at least one cold plate 2042 , and the mainboard 204 is disposed in the accommodating space.

[0085] The combined cooling system 10 includes the following components disposed in the accommodation space: an oil tank 102 , a heat exchanger 104 , a pump 106 , a fan 108 , a first temperature detection device 110 , and a controller 112 .

[0086] One surface of the oil tank 102 at least covers the area where the cold plate 2042 is located.

[0087] The liquid inlet of the heat exchanger 104 is in communication with the liquid outlet of the oil tank 102 .

[0088] The liquid inlet of the pump 106 is communicated with the liquid outlet of the heat exchanger 104 , and the liquid outlet of the pump 106 is communicated with the liquid inlet of the oil tank 102 .

[0089] The blowing area of ​​the fan 108 includes the area where the heat exchanger 104 and the pump 106 are located.

[0090] The first temperature detection device 110 is used to detect the actual temperature of the cold plate 2042 .

[0091] The controller 112 is respectively connected to the first temperature detection devices 110, the pump 106 and the fan 108; the controller 112 is used to receive the actual temperature and start the pump 106 when the actual temperature is higher than the starting temperature; the controller 112 is also used to adjust the output flow of the pump 106 according to the actual temperature. The controller 112 is also used to start the fan 108 when the actual temperature is higher than the safety temperature to cool down the heat exchanger 104 and the pump 106.

[0092] Among them, the starting temperature is lower than the safety temperature.

[0093] The cold plate 2042 has excellent thermal conductivity and can achieve efficient heat exchange, thereby supporting efficient cooling and heat dissipation. Further, according to the size of the server 20 and the heat dissipation requirements of the server 20, multiple cold plates 2042 can be set to achieve multi-point cooling and heat dissipation, further improving the heat dissipation efficiency.

[0094] Correspondingly, when there are multiple cold plates 2042 , the number of the first temperature detection devices 110 is consistent with the number of the cold plates 2042 to achieve multi-point temperature detection.

[0095] When the controller 112 receives that the actual temperature of the cold plate 2042 is higher than the start-up temperature, the controller 112 can turn on the pump 106 to dissipate heat and cool the cold plate 2042 through a liquid cooling cycle, thereby achieving heat dissipation and cooling of the mainboard 204; after turning on the pump 106, the controller 112 can also adjust the output flow of the pump 106 according to the actual temperature, so that the cooling amount of the liquid cooling cycle matches the temperature increase amount of the cold plate 2042, thereby performing real-time heat dissipation and cooling processing on the temperature of the mainboard 204; when the actual temperature received by the controller 112 is higher than the safety temperature, the controller 112 can turn on the fan 108 to cool the heat exchanger 104 and the pump 106, thereby improving the heat dissipation and cooling efficiency of the mainboard 204. By dissipating heat and cooling the mainboard 204, heat dissipation and cooling of the server 20 can be achieved.

[0096] In one embodiment, Figure 3 As shown, the server 20 also includes a hard disk 206 and a power supply 208, and one surface of the fuel tank 102 also covers the area where the hard disk 206 and the power supply 208 are located.

[0097] During the operation of the server 20 , the hard disk 206 and the power supply 208 therein will also generate heat. Therefore, the coverage area of ​​the oil tank 102 can be extended to cover the area where the hard disk 206 and the power supply 208 are located, thereby further improving the heat dissipation and cooling efficiency of the server 20 .

[0098] In one embodiment, Figure 3 As shown, the controller 112 is also used to increase the speed of the fan 108 when the actual temperature is higher than a temperature threshold; wherein the temperature threshold is greater than a safe temperature.

[0099] Optionally, the fan 108 can be installed in the casing 202 of the server 20 and arranged close to the heat exchanger 104 and the pump 106 to better cool the heat exchanger 104 and the pump 106, thereby improving the working efficiency of the heat exchanger 104 and the pump 106, so as to achieve the effect of improving the heat dissipation and cooling efficiency of the server 20.

[0100] Optionally, the fan 108 may be installed outside the casing 202 of the server 20 and disposed close to the heat exchanger 104 and the pump 106, so that the fan 108 can be easily repaired or cleaned to ensure that the fan 108 is in optimal working condition.

[0101] In one embodiment, after the fan 108 is turned on, the controller 112 is further configured to adjust the speed of the fan 108 according to the actual temperature.

[0102] Specifically, after the fan 108 is turned on, the controller 112 can increase the speed of the fan 108 until the maximum speed of the fan 108 is reached when the actual temperature rises; the controller 112 can also decrease the speed of the fan 108 until the fan 108 is turned off when the actual temperature drops. When the fan 108 is turned off, it is characterized by the actual temperature at this time falling back to a range below the safe temperature.

[0103] In one embodiment, Figure 3 As shown, the server 20 includes a plurality of fans 108 .

[0104] The plurality of fans 108 can improve the cooling efficiency of the heat exchanger 104 and the pump 106 .

[0105] For example, when the actual temperature is higher than the safety temperature, the number of fans 108 put into use can be gradually increased as the actual temperature increases; or when the actual temperature is higher than the safety temperature, all fans 108 can be turned on at the same time, and the speed of each fan 108 can be gradually increased as the actual temperature increases. Of course, when there are multiple fans 108, the turning on of each fan 108 and the adjustment of the speed can also follow other adjustment methods, but the overall adjustment rule is that when the actual temperature is higher than the safety temperature, the number of fans 108 put into use and / or the speed of the turned-on fans 108 can be increased as the actual temperature increases.

[0106] In one embodiment, the combined heat dissipation system 10 further includes: a second temperature sensor 116 .

[0107] The second temperature sensor 116 is disposed on the outer wall of the housing 202 and is used to detect the ambient temperature of the server 20 .

[0108] The controller 112 is connected to the second temperature sensor 116 , and the controller 112 is further configured to receive and adjust the start-up temperature, the safety temperature, and the temperature threshold according to the ambient temperature.

[0109] Among them, the ambient temperature is positively correlated with the startup temperature, safety temperature and temperature threshold.

[0110] The higher the ambient temperature of the server 20 is, the higher the startup temperature, the safety temperature and the temperature threshold can be adjusted accordingly to avoid repeatedly starting the pump 106 and the fan 108 , thereby extending the service life of the combined cooling system 10 .

[0111] In one embodiment, the heat exchanger 104, the pump 106, and the fan 108 are located on one side of the main board 204 and are arranged close to the cold plate 2042. Such an arrangement can reduce the laying path of the pipeline for transmitting liquid cooling oil, thereby reducing material costs.

[0112] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0113] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A combined cooling system, characterized in that: include: An oil tank, one surface of which at least covers a heat dissipation area of ​​the device to be cooled; a heat exchanger, wherein a liquid inlet of the heat exchanger is connected to a liquid outlet of the oil tank; A pump, wherein a liquid inlet of the pump is connected to a liquid outlet of the heat exchanger, and a liquid outlet of the pump is connected to a liquid inlet of the oil tank; A fan, wherein the blowing area of ​​the fan includes the area where the heat exchanger and the pump are located; A first temperature detection device, the first temperature detection device is used to detect the actual temperature of the heat dissipation area of ​​the heat dissipation device; a controller, the controller being connected to each of the first temperature detection devices, the pump and the fan respectively; the controller being used to receive the actual temperature and start the pump when the actual temperature is higher than the start temperature; the controller being used to adjust the output flow of the pump according to the actual temperature, and the controller being used to start the fan when the actual temperature is higher than the safety temperature, so as to cool the heat exchanger and the pump; Wherein, the startup temperature is lower than the safety temperature.

2. The combined cooling system according to claim 1, characterized in that: The controller is further configured to increase the speed of the fan when the actual temperature is higher than a temperature threshold; Wherein, the temperature threshold is greater than the safety temperature.

3. The combined cooling system according to claim 2, characterized in that: Also includes: An alarm module, the alarm module is connected to the controller; The controller is further configured to drive the alarm module to execute an alarm action when the actual temperature is continuously higher than the temperature threshold within a preset time.

4. The combined cooling system according to claim 2, characterized in that: Also includes: A second temperature sensor, the second temperature sensor is used to detect the ambient temperature of the device to be cooled; The controller is connected to the second temperature sensor, and the controller is further used to receive and adjust the start temperature, the safety temperature and the temperature threshold according to the ambient temperature; The ambient temperature is positively correlated with the startup temperature, the safety temperature and the temperature threshold.

5. The combined cooling system according to claim 1, characterized in that: The pipeline connecting the oil tank and the heat exchanger, and the pipeline connecting the oil tank and the pump are smooth transparent pipes.

6. A server, characterized in that: include: A casing having a receiving space; A mainboard, the mainboard having at least one cold plate, the mainboard being arranged in the accommodating space; A combined heat dissipation system, the combined heat dissipation system comprising the following components arranged in the accommodating space: An oil tank, one surface of which at least covers the area where the cold plate is located; a heat exchanger, wherein a liquid inlet of the heat exchanger is connected to a liquid outlet of the oil tank; A pump, wherein a liquid inlet of the pump is connected to a liquid outlet of the heat exchanger, and a liquid outlet of the pump is connected to a liquid inlet of the oil tank; A fan, wherein the blowing area of ​​the fan includes the area where the heat exchanger and the pump are located; a first temperature detection device, the first temperature detection device being used to detect the actual temperature of the cold plate; a controller, the controller being connected to each of the first temperature detection devices, the pump and the fan respectively; the controller being used to receive the actual temperature and start the pump when the actual temperature is higher than the start temperature; the controller being used to adjust the output flow of the pump according to the actual temperature, and the controller being used to start the fan when the actual temperature is higher than the safety temperature, so as to cool the heat exchanger and the pump; Wherein, the startup temperature is lower than the safety temperature.

7. The server according to claim 6, characterized in that: The server also includes a hard disk and a power supply, and one surface of the oil tank also covers an area where the hard disk and the power supply are located.

8. The server according to claim 6, characterized in that: The controller is further configured to increase the rotation speed of the fan when the actual temperature is higher than a temperature threshold; wherein the temperature threshold is greater than the safety temperature.

9. The server according to claim 8, characterized in that: The combined cooling system further comprises: A second temperature sensor, the second temperature sensor is arranged on the outer wall of the housing and is used to detect the ambient temperature of the server; The controller is connected to the second temperature sensor, and the controller is further used to receive and adjust the start temperature, the safety temperature and the temperature threshold according to the ambient temperature; The ambient temperature is positively correlated with the startup temperature, the safety temperature and the temperature threshold.

10. The server according to claim 6, characterized in that: The heat exchanger, the pump and the fan are located on one side of the main board and are arranged close to the cold plate.

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