Composite refrigeration device and refrigeration method for data center

Abstract

The invention provides a data center composite refrigeration device and a refrigeration method, and relates to a refrigeration device to solve the technical problems in the prior art that the data center refrigeration device cannot effectively refrigerate when the outdoor ambient temperature is high and the equipment may be damaged due to water leakage; the data center composite refrigeration device, one end of the first main line, one end of the second main line, one end of the third main line, and one end of the fourth main line are respectively connected to the air outlet of an air-cooled evaporator, the air inlet of a first air-cooled condenser, the air inlet of the air-cooled evaporator, and the air outlet of the first air-cooled condenser, the first auxiliary pipeline and the second auxiliary pipeline are both connected between the first main line and the second main line, the third auxiliary pipeline and the fourth auxiliary pipeline are both connected between the third main line and the fourth main line, the first auxiliary pipeline is connected in series with a nitrogen pump and a first solenoid valve, the second auxiliary pipeline is connected in series with a compressor and a second solenoid valve, the third auxiliary pipeline is connected in series with an electronic expansion valve and a third solenoid valve, and the fourth auxiliary pipeline is connected in series with a fourth solenoid valve.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration devices, and in particular to a composite refrigeration device and a refrigeration method for a data center. Background Art

[0002] Data centers are facilities used to centrally store, manage, and distribute data, usually including a large number of servers, storage devices, and network devices. They play a vital role in modern information technology architecture and are widely used in cloud computing, website hosting, enterprise data management, and other fields.

[0003] Data centers generate a lot of heat during operation, so they need to be equipped with refrigeration devices. Currently, the refrigeration devices in data centers on the market are generally gravity heat pipes or water-cooled chillers + terminals to achieve data center cooling, which has several problems: if gravity heat pipes are used alone, since gravity heat pipe cooling requires a sufficiently large temperature difference between indoors and outdoors, it cannot be effectively cooled when the outdoor ambient temperature is high; if water-cooled chillers + terminals are used, the problem is that water leaks inside the terminals, which will pose a safety hazard. If the water pipes leak, it may cause damage to the equipment in the computer room. Summary of the invention

[0004] In view of the deficiencies in the prior art, the first object of the present invention is to provide a data center composite refrigeration device to solve the technical problems in the prior art that the data center refrigeration device cannot effectively cool when the outdoor ambient temperature is high and the equipment may be damaged due to water leakage.

[0005] In order to solve the above technical problems, the present invention provides a data center composite refrigeration device, including an air-cooled evaporator, a first air-cooled condenser, a first main line, a second main line, a third main line, a fourth main line, a first sub-line, a second sub-line, a third sub-line, a fourth sub-line, a temperature detection module and a control module, one end of the first main line is connected to the air outlet of the air-cooled evaporator, one end of the second main line is connected to the air inlet of the first air-cooled condenser, one end of the third main line is connected to the air inlet of the air-cooled evaporator, one end of the fourth main line is connected to the air outlet of the first air-cooled condenser, one end of the first sub-line and one end of the second sub-line are both connected to the other end of the first main line, and the other end of the first sub-line is connected to the air outlet of the first air-cooled condenser. The first auxiliary pipeline is connected to the second main pipeline, the second auxiliary pipeline is connected to the second main pipeline, the third auxiliary pipeline is connected to the second main pipeline, the second auxiliary pipeline is connected to the second main pipeline, the third auxiliary pipeline is connected to the second main pipeline, the second auxiliary pipeline is connected to the second main pipeline, the third auxiliary pipeline is connected to the second main pipeline, the third auxiliary pipeline is connected to the second main pipeline, the second auxiliary pipeline is connected to the second main pipeline, the third auxiliary pipeline is connected to the third main pipeline, the fourth auxiliary pipeline is connected to the fourth main pipeline, the temperature detection module is used to detect the outdoor ambient temperature, the temperature detection module, the nitrogen pump, the first solenoid valve, the compressor, the second solenoid valve, the electronic expansion valve, the third solenoid valve and the fourth solenoid valve are all electrically connected to the control module.

[0006] After adopting the above structure, the data center composite refrigeration device in the present invention has the following advantages: when the outdoor ambient temperature is low, the first solenoid valve and the fourth solenoid valve are connected, the second solenoid valve and the third solenoid valve are disconnected, the compressor does not work, and the nitrogen pump starts working to perform heat pipe refrigeration; when the outdoor ambient temperature is high, the first solenoid valve and the fourth solenoid valve are disconnected, the second solenoid valve and the third solenoid valve are connected, the compressor works, the nitrogen pump stops working, and compressor refrigeration is performed. In this way, even when the ambient temperature is high, the data center can still be effectively cooled, and there is no need to use a water-cooled chiller, which avoids damage to the equipment caused by water pipe leakage. In addition, switching to the heat pipe refrigeration mode when the ambient temperature is low can reduce energy consumption compared to using only compressor refrigeration.

[0007] As an improvement, the air-cooled evaporator is connected to a centrifugal fan; this structure is used to blow cold air into the room.

[0008] As an improvement, the first air-cooled condenser is connected to an axial flow fan; this structure is used to blow hot air to the outside.

[0009] As an improvement, a low-pressure controller is connected in series on the first main line or the second auxiliary line, and a high-pressure controller is connected in series on the second main line or the second auxiliary line. The low-pressure controller is arranged on the side close to the air inlet of the compressor, and the high-pressure controller is arranged on the side close to the air outlet of the compressor. With this structure, the compressor is protected by arranging the low-pressure controller and the high-pressure controller.

[0010] As an improvement, a liquid accumulator is connected in series to the fourth main line; with this structure, the liquid accumulator is used to store refrigerant or provide refrigerant according to different refrigeration conditions, so that there is enough refrigerant in the refrigeration device under various conditions.

[0011] As an improvement, a drying filter is connected in series in the fourth main pipe; this structure is used to dry and filter the gas.

[0012] As an improvement, right-angle stop valves are connected in series on both the second main pipe and the fourth main pipe.

[0013] As an improvement, the present invention also includes a second air-cooled condenser, a fifth auxiliary pipeline, a sixth auxiliary pipeline, a fifth solenoid valve, a sixth solenoid valve, a seventh solenoid valve and an eighth solenoid valve, the air inlet of the second air-cooled condenser is connected to the second main pipeline through the fifth auxiliary pipeline, the air outlet of the second air-cooled condenser is connected to the fourth main pipeline through the sixth auxiliary pipeline, the fifth solenoid valve is connected in series to the second main pipeline and is located between the connection point between the fifth auxiliary pipeline and the second main pipeline and the first air-cooled condenser, the sixth solenoid valve is connected in series to the fourth main pipeline and is located between the connection point between the first air-cooled condenser and the sixth auxiliary pipeline and the fourth main pipeline, the seventh solenoid valve is connected in series to the fifth auxiliary pipeline, and the eighth solenoid valve is connected in series to the sixth auxiliary pipeline. The temperature detection module includes a first temperature sensor and a second temperature sensor, the first temperature sensor is connected to the side wall of the first air-cooled condenser through an insulation block, the second temperature sensor is connected to the side wall of the second air-cooled condenser through an insulation block, the first air-cooled condenser and the second air-cooled condenser are respectively installed on different side walls of the data center, and the first temperature sensor, the second temperature sensor, the fifth solenoid valve, the sixth solenoid valve, the seventh solenoid valve and the eighth solenoid valve are all electrically connected to the control module; In a data center located outdoors, such as a container-type data center, the ambient temperature on the illuminated side is higher than that on the unilluminated side. Therefore, when the ambient temperature itself is near the critical temperature for switching the refrigeration device mode, the illuminated ambient temperature may be greater than the critical temperature, while the unilluminated ambient temperature may be less than the critical temperature. If the air-cooled condenser and the temperature sensor are on the illuminated side at this time, the refrigeration device will be in the compressor refrigeration mode and cannot be switched to the heat pipe refrigeration mode, resulting in an increase in energy consumption. Therefore, a second air-cooled condenser and a second temperature sensor are additionally provided, and the first air-cooled condenser and the second air-cooled condenser are respectively located on different side walls of the data center, which may be adjacent or opposite. On the same day, the lighting conditions of the first air-cooled condenser and the second air-cooled condenser are different. The first air-cooled condenser or the second air-cooled condenser can be switched on by the fifth solenoid valve, the sixth solenoid valve, the seventh solenoid valve and the eighth solenoid valve, thereby preferentially selecting the first air-cooled condenser or the second air-cooled condenser and switching the refrigeration mode of the refrigeration device to the heat pipe refrigeration, which increases the heat pipe refrigeration time to a certain extent and further reduces energy consumption.

[0014] As an improvement, the present invention also includes a first air outlet guide duct and a second air outlet guide duct, one end of the first air outlet guide duct is connected to the first air-cooled condenser, one end of the second air outlet guide duct is connected to the second air-cooled condenser, the other end of the first air outlet guide duct and the other end of the second air outlet guide duct are both arranged upward, axial fans are connected in the first air outlet guide duct and the second air outlet guide duct, the first temperature sensor is connected to the lower side wall of the first air-cooled condenser, and the second temperature sensor is connected to the lower side wall of the second air-cooled condenser; with this structure, the installation positions of the first temperature sensor and the second temperature sensor and the setting of the insulation block can more accurately detect the ambient temperature at the first air-cooled condenser and the second air-cooled condenser, and the setting method of the first air outlet guide duct and the second air outlet guide duct can discharge the hot air discharged from the first air-cooled condenser and the second air-cooled condenser upward, so as to prevent the hot air from affecting the detection of the ambient temperature by the first temperature sensor and the second temperature sensor.

[0015] A second object of the present invention is to provide a refrigeration method for a data center composite refrigeration device, which is applied to the above-mentioned data center composite refrigeration device, wherein a control module switches the refrigeration mode of the data center composite refrigeration device between a heat pipe refrigeration mode and a compressor refrigeration mode, and comprises the following steps: S1, the critical temperature for switching to the cooling mode is preset as T, the effective time is preset as t, the ambient temperature is detected by the first temperature sensor and recorded as T1, and the ambient temperature is detected by the second temperature sensor and recorded as T2; S2. If T1 is greater than or equal to T and the duration is greater than or equal to t, the control module records the signal Y1; If T1 is less than T and the duration is greater than or equal to t, the control module records the signal R1; If T2 is greater than or equal to T and the duration is greater than or equal to t, the control module records signal Y2; If T2 is less than T and the duration is greater than or equal to t, the control module records the signal R2; S3. If the control module records the signals as Y1 and Y2, the data center composite refrigeration device is in compressor refrigeration mode, one of the first air-cooled condenser and the second air-cooled condenser is connected, and the other is disconnected; If the recorded signals received by the control module are R1 and R2, the data center composite refrigeration device is in the heat pipe cooling mode, one of the first air-cooled condenser and the second air-cooled condenser is connected, and the other is disconnected; If the control module receives the recorded signals Y1 and R2, the second air-cooled condenser is connected, the first air-cooled condenser is disconnected, and the data center composite refrigeration device is in heat pipe cooling mode; If the recorded signals received by the control module are R1 and Y2, the first air-cooled condenser is connected, the second air-cooled condenser is disconnected, and the data center composite refrigeration device is in heat pipe cooling mode.

[0016] After adopting the above method, the refrigeration method of the data center composite refrigeration device in the present invention has the following advantages: the first temperature sensor and the second temperature sensor respectively detect the ambient temperature at different positions, the control module uniformly monitors the ambient temperature at the two positions, and selects a suitable first air-cooled condenser or a second air-cooled condenser to switch the refrigeration mode to heat pipe refrigeration, which increases the heat pipe refrigeration time to a certain extent, further reduces energy consumption, and is only used as an effective detection when the detected ambient temperature duration is greater than or equal to t, avoiding the influence of factors such as temperature changes in a short period of time and detection errors, which lead to frequent switching of the refrigeration mode of the refrigeration device in a short period of time, which in turn increases energy consumption and even damages structures such as the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the indoor part of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the outdoor part of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the first air-cooled condenser part in the present invention.

[0021] Figure 5 It is a schematic structural diagram of the second air-cooled condenser part in the present invention.

[0022] Figure numerals: 1, air-cooled evaporator; 2, first air-cooled condenser; 3, first main line; 4, second main line; 5, third main line; 6, fourth main line; 7, first auxiliary line; 8, second auxiliary line; 9, third auxiliary line; 10, fourth auxiliary line; 11, nitrogen pump; 12, first solenoid valve; 13, compressor; 14, second solenoid valve; 15, electronic expansion valve; 16, third solenoid valve; 17, fourth solenoid valve; 18, centrifugal fan; 19, Axial flow fan; 20. low pressure controller; 21. high pressure controller; 22. liquid storage tank; 23. drying filter; 24. right angle stop valve; 25. second air-cooled condenser; 26. fifth auxiliary pipeline; 27. sixth auxiliary pipeline; 28. fifth solenoid valve; 29. ​​sixth solenoid valve; 30. seventh solenoid valve; 31. eighth solenoid valve; 32. first temperature sensor; 33. second temperature sensor; 34. first air outlet guide pipe; 35. second air outlet guide pipe. DETAILED DESCRIPTION

[0023] The data center composite refrigeration device and refrigeration method of the present invention are described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 5 As shown, a composite refrigeration device and refrigeration method for a data center include an air-cooled evaporator 1, a first air-cooled condenser 2, a first main line 3, a second main line 4, a third main line 5, a fourth main line 6, a first sub-line 7, a second sub-line 8, a third sub-line 9, a fourth sub-line 10, a temperature detection module and a control module, one end of the first main line 3 is connected to the air outlet of the air-cooled evaporator 1, one end of the second main line 4 is connected to the air inlet of the first air-cooled condenser 2, one end of the third main line 5 is connected to the air inlet of the air-cooled evaporator 1, one end of the fourth main line 6 is connected to the air outlet of the first air-cooled condenser 2, one end of the first sub-line 7 and one end of the second sub-line 8 are both connected to the other end of the first main line 3, and the other end of the first sub-line 7 and the other end of the second sub-line 8 are both connected The other end of the second main pipeline 4, one end of the third sub-pipeline 9 and one end of the fourth sub-pipeline 10 are all connected to the other end of the third main pipeline 5, the other end of the third sub-pipeline 9 and the other end of the fourth sub-pipeline 10 are all connected to the other end of the fourth main pipeline 6, the first sub-pipeline 7 is connected in series with a nitrogen pump 11 and a first solenoid valve 12, the second sub-pipeline 8 is connected in series with a compressor 13 and a second solenoid valve 14, the third sub-pipeline 9 is connected in series with an electronic expansion valve 15 and a third solenoid valve 16, and the fourth sub-pipeline 10 is connected in series with a fourth solenoid valve 17. The temperature detection module is used to detect the outdoor ambient temperature. The temperature detection module, the nitrogen pump 11, the first solenoid valve 12, the compressor 13, the second solenoid valve 14, the electronic expansion valve 15, the third solenoid valve 16 and the fourth solenoid valve 17 are all electrically connected to the control module.

[0025] like Figure 1 and Figure 2 As shown, the air-cooled evaporator 1 is connected to a centrifugal fan 18, a low-pressure controller 20 is connected in series on the first main line 3 or the second auxiliary line 8, a high-pressure controller 21 is connected in series on the second main line 4 or the second auxiliary line 8, the low-pressure controller 20 is arranged on a side close to the air inlet of the compressor 13, and the high-pressure controller 21 is arranged on a side close to the air outlet of the compressor 13. In this embodiment, the low-pressure controller 20 is arranged on the second auxiliary line 8, the high-pressure controller 21 is arranged on the second main line 4, and a liquid reservoir 22 and a drying filter 23 are connected in series on the fourth main line 6, and the liquid reservoir 22 is closer to the first air-cooled condenser 2 than the drying filter 23; Figure 1 and Figure 3 As shown, the first air-cooled condenser 2 is connected to an axial flow fan 19; in addition, right-angle stop valves 24 are connected in series on the second main line 4 and the fourth main line 6, wherein the right-angle stop valve 24 on the second main line 4 is arranged between the high-pressure controller 21 and the first air-cooled condenser 2, and the right-angle stop valve 24 on the fourth main line 6 is arranged between the liquid reservoir 22 and the first air-cooled condenser 2.

[0026] The structure of the present invention is divided into an indoor part and an outdoor part. Figure 2 and Figure 3 As shown, the second main line 4 and the fourth main line 6 connect the indoor part and the outdoor part.

[0027] When the outdoor ambient temperature is low, the first solenoid valve 12 and the fourth solenoid valve 17 are connected, the second solenoid valve 14 and the third solenoid valve 16 are disconnected, the compressor 13 does not work, and the nitrogen pump 11 starts to work to perform heat pipe cooling. The high-temperature refrigerant gas enters the first air-cooled condenser 2 and is condensed into a low-temperature refrigerant. The low-temperature refrigerant passes through the liquid reservoir 22 and the drying filter 23 in turn and enters the air-cooled evaporator 1, so that the centrifugal fan 18 blows cold air to the data center. The nitrogen pump 11 receives the refrigerant output by the air-cooled evaporator 1 and outputs the high-temperature refrigerant gas to the first air-cooled condenser 2 to achieve circulating refrigeration; when the outdoor ambient temperature is high, the first solenoid valve 12 and the fourth solenoid valve 17 are disconnected, the second solenoid valve 14 and the third solenoid valve 16 are connected, the compressor 13 works, the nitrogen pump 11 stops working, and the compressor 13 is cooled. The compressor 13 outputs high-temperature and high-pressure refrigerant gas, which is condensed into high-temperature refrigerant liquid after passing through the first air-cooled condenser 2, and then passes through the liquid reservoir 22 and the drying filter 2 in turn. 3, the low-temperature refrigerant is output through the electronic expansion valve 15 and enters the air-cooled evaporator 1, so that the centrifugal fan 18 blows cold air to the data center, and the air-cooled evaporator 1 outputs the low-temperature refrigerant gas into the compressor 13, and the compressor 13 outputs the high-temperature and high-pressure gas again to complete the cycle refrigeration; in this way, even when the ambient temperature is high, the data center can still be effectively cooled, and there is no need to use a water-cooled chiller, which avoids the damage to the equipment caused by water pipe leakage. In addition, when the ambient temperature is low, switching to the heat pipe cooling mode can also reduce energy consumption; outdoor temperature detection can be achieved by electrically connecting the temperature sensor installed outdoors with the control system used in the present invention, and the control system can automatically switch the working mode of the present invention according to the set temperature, effectively improving the energy saving efficiency. The present invention can also control the dew point temperature according to the room temperature of the data center, improve the sensible heat ratio of the unit, and prevent condensation of electrical parts and damage to electrical components. The refrigeration compressor 13 uses variable frequency to automatically adjust the frequency according to the dew point temperature of the room.

[0028] In addition, the present invention also includes a second air-cooled condenser 25, a fifth auxiliary pipeline 26, a sixth auxiliary pipeline 27, a fifth solenoid valve 28, a sixth solenoid valve 29, a seventh solenoid valve 30 and an eighth solenoid valve 31. The air inlet of the second air-cooled condenser 25 is connected to the second main pipeline 4 through the fifth auxiliary pipeline 26, and the air outlet of the second air-cooled condenser 25 is connected to the fourth main pipeline 6 through the sixth auxiliary pipeline 27. The fifth solenoid valve 28 is connected in series to the second main pipeline 4 and is located between the connection point between the fifth auxiliary pipeline 26 and the second main pipeline 4 and the first air-cooled condenser 2. The sixth solenoid valve 29 is connected in series to the fourth main pipeline 6 and is located between the first air-cooled condenser 2 and the connection point between the sixth auxiliary pipeline 27 and the fourth main pipeline 6. The seventh solenoid valve 30 is connected in series to the fifth auxiliary pipeline 26, and the eighth solenoid valve 31 is connected in series to the sixth auxiliary pipeline 27. The specific positions of the fifth solenoid valve 28, the sixth solenoid valve 29, the seventh solenoid valve 30 and the eighth solenoid valve 31 can be referred to. Figure 1 , among which, although Figure 3 2 and 3. The fifth solenoid valve 28, the sixth solenoid valve 29, the seventh solenoid valve 30 and the eighth solenoid valve 31 are shown to be located in the outdoor part, but the fifth solenoid valve 28, the sixth solenoid valve 29, the seventh solenoid valve 30 and the eighth solenoid valve 31 are preferably installed indoors.

[0029] The temperature detection module includes a first temperature sensor 32 and a second temperature sensor 33. The first temperature sensor 32 is connected to the side wall of the first air-cooled condenser 2 through an insulation block, and the second temperature sensor 33 is connected to the side wall of the second air-cooled condenser 25 through an insulation block. The first air-cooled condenser 2 and the second air-cooled condenser 25 are respectively installed on different side walls of the data center, adjacent or opposite. The first temperature sensor 32, the second temperature sensor 33, the fifth solenoid valve 28, the sixth solenoid valve 29, the seventh solenoid valve 30 and the eighth solenoid valve 31 are all electrically connected to the control module.

[0030] Specifically, if Figure 4 and Figure 5 As shown, the present invention also includes a first air outlet guide duct 34 and a second air outlet guide duct 35, one end of the first air outlet guide duct 34 is connected to the first air-cooled condenser 2, one end of the second air outlet guide duct 35 is connected to the second air-cooled condenser 25, the other end of the first air outlet guide duct 34 and the other end of the second air outlet guide duct 35 are both arranged upward, and an axial flow fan 19 is connected to the inside of the first air outlet guide duct 34 and the inside of the second air outlet guide duct 35, the first temperature sensor 32 is connected to the lower side wall of the first air-cooled condenser 2, and the second temperature sensor 33 is connected to the lower side wall of the second air-cooled condenser 25, wherein the first air outlet guide duct 34, the second air outlet guide duct 35 and the axial flow fan 19 can be provided in multiples as needed.

[0031] For a data center located outdoors, such as a container-type data center, the ambient temperature on the illuminated side is higher than that on the unilluminated side. Therefore, when the ambient temperature itself is near the critical temperature for switching the refrigeration device mode, the illuminated ambient temperature may be greater than the critical temperature, while the unilluminated ambient temperature may be less than the critical temperature. If the air-cooled condenser and the temperature sensor are on the illuminated side at this time, the refrigeration device is in the compressor 13 refrigeration mode and cannot be switched to the heat pipe refrigeration mode, resulting in an increase in energy consumption. Therefore, by additionally providing a second air-cooled condenser 25 and a second temperature sensor 33, the first air-cooled condenser 2 and the second air-cooled condenser 25 are respectively located in the data center. On different side walls of the center, they may be adjacent or opposite to each other. On the same day, the lighting conditions of the first air-cooled condenser 2 and the second air-cooled condenser 25 are different. The first air-cooled condenser 2 or the second air-cooled condenser 25 can be switched on by the fifth solenoid valve 28, the sixth solenoid valve 29, the seventh solenoid valve 30 and the eighth solenoid valve 31, that is, the first air-cooled condenser 2 is turned on when the fifth solenoid valve 28 and the sixth solenoid valve 29 are turned on, and the second air-cooled condenser 25 is turned on when the seventh solenoid valve 30 and the eighth solenoid valve 31 are turned on, thereby preferentially selecting the first air-cooled condenser 2 or the second air-cooled condenser 25 and switching the refrigeration mode of the refrigeration device to heat pipe refrigeration, thereby increasing the heat pipe refrigeration time to a certain extent and further reducing energy consumption.

[0032] Moreover, for a container-type data center, due to movement, its position and orientation may change, and accordingly, the orientation of the first air-cooled condenser 2 and the second air-cooled condenser 25 may change. Therefore, it is difficult to ensure that a certain outer wall of the container-type data center is always the shaded side. By arranging the first air-cooled condenser 2 and the second air-cooled condenser 25 on different side walls, it can be ensured that within a certain period of time, at least one air-cooled condenser is on the shaded side with a lower ambient temperature, thereby selecting a heat pipe cooling mode to reduce energy consumption.

[0033] The present invention also relates to a refrigeration method for a data center composite refrigeration device, which is applied to the above-mentioned data center composite refrigeration device, wherein a control module switches the refrigeration mode of the data center composite refrigeration device between a heat pipe refrigeration mode and a compressor 13 refrigeration mode, and comprises the following steps: S1, the critical temperature for switching the cooling mode is preset to be T, the effective time is preset to be t, the ambient temperature is detected by the first temperature sensor 32 and recorded as T1, and the ambient temperature is detected by the second temperature sensor 33 and recorded as T2; wherein, when the refrigeration device is just started, if the ambient temperature is greater than or equal to T, the first air-cooled condenser 2 or the second air-cooled condenser 25 performs the compressor 13 cooling mode, and if the ambient temperature is lower than T, the first air-cooled condenser 2 or the second air-cooled condenser 25 performs the heat pipe cooling mode, and the lower temperature of T1 and T2 is used as the ambient temperature and the corresponding air-cooled condenser is selected; in this embodiment, the critical temperature T is 15°C, the effective time t is 5min, and the critical temperature T and the effective time t can be adjusted according to the actual energy consumption and cooling effect; S2. If T1 is greater than or equal to T and the duration is greater than or equal to t, the control module records the signal Y1; If T1 is less than T and the duration is greater than or equal to t, the control module records the signal R1; If T2 is greater than or equal to T and the duration is greater than or equal to t, the control module records signal Y2; If T2 is less than T and the duration is greater than or equal to t, the control module records the signal R2; wherein, the Y1 or R1 signal recorded later will overwrite the previous Y1 or R1 signal, and similarly, the Y2 or R2 signal recorded later will overwrite the previous Y2 or R2 signal; and within a period of time after the refrigeration device is just started, the control module may record only one signal. If the recorded signal at this time is R1 or R2, the corresponding air-cooled condenser will perform heat pipe cooling. If it has been in the heat pipe cooling mode before, you can choose not to switch the air-cooled condenser; if it is Y1, if it was the heat pipe cooling mode of the first air-cooled condenser 2 before, then switch to the compressor 13 cooling mode, otherwise keep the previous cooling mode; if it is Y2, if it was the heat pipe cooling mode of the second air-cooled condenser 25 before, then switch to the compressor 13 cooling mode, otherwise keep the previous cooling mode; S3, if the control module records the signals as Y1 and Y2, the data center composite refrigeration device is in the refrigeration mode of the compressor 13, one of the first air-cooled condenser 2 and the second air-cooled condenser 25 is connected, and the other is disconnected; If the control module receives the recorded signals R1 and R2, the data center composite refrigeration device is in the heat pipe refrigeration mode, one of the first air-cooled condenser 2 and the second air-cooled condenser 25 is connected, and the other is disconnected; If the control module receives the recorded signals Y1 and R2, the second air-cooled condenser 25 is connected, the first air-cooled condenser 2 is disconnected, and the data center composite refrigeration device is in heat pipe cooling mode; If the recorded signals received by the control module are R1 and Y2, the first air-cooled condenser 2 is connected, and the second air-cooled condenser 25 is disconnected, and the data center composite refrigeration device is in the heat pipe cooling mode.

[0034] The first temperature sensor 32 and the second temperature sensor 33 respectively detect the ambient temperature at different positions. The control module uniformly monitors the ambient temperature at the two positions and selects the appropriate first air-cooled condenser 2 or the second air-cooled condenser 25 to switch the refrigeration mode to heat pipe refrigeration, which increases the heat pipe refrigeration time to a certain extent and further reduces energy consumption. In addition, it is only used as an effective detection when the detected ambient temperature duration is greater than or equal to t, avoiding the influence of factors such as temperature changes in a short period of time and detection errors that cause the refrigeration mode of the refrigeration device to be frequently switched in a short period of time, which in turn causes an increase in energy consumption and even damage to structures such as the compressor 13.

[0035] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned one embodiment, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A data center composite refrigeration device, characterized in that: The invention comprises an air-cooled evaporator (1), a first air-cooled condenser (2), a first main line (3), a second main line (4), a third main line (5), a fourth main line (6), a first sub-line (7), a second sub-line (8), a third sub-line (9), a fourth sub-line (10), a temperature detection module and a control module, wherein one end of the first main line (3) is connected to the air outlet of the air-cooled evaporator (1), one end of the second main line (4) is connected to the air inlet of the first air-cooled condenser (2), one end of the third main line (5) is connected to the air inlet of the air-cooled evaporator (1), one end of the fourth main line (6) is connected to the air outlet of the first air-cooled condenser (2), one end of the first sub-line (7) and one end of the second sub-line (8) are both connected to the other end of the first main line (3), the other end of the first sub-line (7) and the other end of the second sub-line (8) are both connected to the other end of the second main line (4), and the third sub-line (9) is connected to the other end of the second main line (4). The first auxiliary pipeline (7) is connected in series with a nitrogen pump (11) and a first solenoid valve (12); the second auxiliary pipeline (8) is connected in series with a compressor (13) and a second solenoid valve (14); the third auxiliary pipeline (9) is connected in series with an electronic expansion valve (15) and a third solenoid valve (16); the fourth auxiliary pipeline (10) is connected in series with a fourth solenoid valve (17); the temperature detection module is used to detect the outdoor ambient temperature; the temperature detection module, the nitrogen pump (11), the first solenoid valve (12), the compressor (13), the second solenoid valve (14), the electronic expansion valve (15), the third solenoid valve (16) and the fourth solenoid valve (17) are all electrically connected to the control module.

2. The data center composite refrigeration device according to claim 1, characterized in that: The air-cooled evaporator (1) is connected to a centrifugal fan (18).

3. The data center composite refrigeration device according to claim 1, characterized in that: The first air-cooled condenser (2) is connected to an axial flow fan (19).

4. The data center composite refrigeration device according to claim 1, characterized in that: A low-pressure controller (20) is connected in series to the first main pipeline (3) or the second auxiliary pipeline (8), and a high-pressure controller (21) is connected in series to the second main pipeline (4) or the second auxiliary pipeline (8); the low-pressure controller (20) is arranged on a side close to an air inlet of the compressor (13), and the high-pressure controller (21) is arranged on a side close to an air outlet of the compressor (13).

5. The data center composite refrigeration device according to claim 1, characterized in that: A liquid storage device (22) is connected in series to the fourth main pipeline (6).

6. The data center composite refrigeration device according to claim 1, characterized in that: A drying filter (23) is connected in series to the fourth main pipe (6).

7. The data center composite refrigeration device according to claim 1, characterized in that: The second main pipe (4) and the fourth main pipe (6) are both connected in series with right-angle stop valves (24).

8. The data center composite refrigeration device according to claim 1, characterized in that: The air-cooled condenser (25) further comprises a second air-cooled condenser (25), a fifth auxiliary pipeline (26), a sixth auxiliary pipeline (27), a fifth solenoid valve (28), a sixth solenoid valve (29), a seventh solenoid valve (30) and an eighth solenoid valve (31); the air inlet of the second air-cooled condenser (25) is connected to the second main pipeline (4) via the fifth auxiliary pipeline (26); the air outlet of the second air-cooled condenser (25) is connected to the fourth main pipeline (6) via the sixth auxiliary pipeline (27); the fifth solenoid valve (28) is connected in series to the second main pipeline (4) and is located between a connection point between the fifth auxiliary pipeline (26) and the second main pipeline (4) and the first air-cooled condenser (2); the sixth solenoid valve (29) is connected in series to the fourth main pipeline (6) and is located between the first air-cooled condenser (2) and a connection point between the sixth auxiliary pipeline (27) and the fourth main pipeline (6). The seventh solenoid valve (30) is connected in series to the fifth auxiliary pipeline (26), and the eighth solenoid valve (31) is connected in series to the sixth auxiliary pipeline (27). The temperature detection module comprises a first temperature sensor (32) and a second temperature sensor (33). The first temperature sensor (32) is connected to the side wall of the first air-cooled condenser (2) through a heat insulation block, and the second temperature sensor (33) is connected to the side wall of the second air-cooled condenser (25) through a heat insulation block. The first air-cooled condenser (2) and the second air-cooled condenser (25) are respectively installed on different side walls of the data center. The first temperature sensor (32), the second temperature sensor (33), the fifth solenoid valve (28), the sixth solenoid valve (29), the seventh solenoid valve (30) and the eighth solenoid valve (31) are all electrically connected to the control module.

9. The data center composite refrigeration device according to claim 8, characterized in that: The air outlet guide pipe (34) and the air outlet guide pipe (35) are also included. One end of the first air outlet guide pipe (34) is connected to the first air-cooled condenser (2), and one end of the second air outlet guide pipe (35) is connected to the second air-cooled condenser (25). The other end of the first air outlet guide pipe (34) and the other end of the second air outlet guide pipe (35) are both arranged upward. An axial flow fan (19) is connected inside the first air outlet guide pipe (34) and the second air outlet guide pipe (35). The first temperature sensor (32) is connected to the lower side wall of the first air-cooled condenser (2), and the second temperature sensor (33) is connected to the lower side wall of the second air-cooled condenser (25).

10. A refrigeration method for a composite refrigeration device in a data center, characterized in that: The data center composite refrigeration device according to claim 8 is applied to the control module, wherein the refrigeration mode of the data center composite refrigeration device is switched between a heat pipe refrigeration mode and a compressor (13) refrigeration mode, comprising the following steps: S1, the critical temperature for switching the cooling mode is preset as T, the effective time is preset as t, the first temperature sensor (32) detects the ambient temperature and records it as T1, and the second temperature sensor (33) detects the ambient temperature and records it as T2; S2. If T1 is greater than or equal to T and the duration is greater than or equal to t, the control module records the signal Y1; If T1 is less than T and the duration is greater than or equal to t, the control module records the signal R1; If T2 is greater than or equal to T and the duration is greater than or equal to t, the control module records the signal Y2; If T2 is less than T and the duration is greater than or equal to t, the control module records the signal R2; S3, if the control module records signals Y1 and Y2, the data center composite refrigeration device is in a compressor (13) refrigeration mode, one of the first air-cooled condenser (2) and the second air-cooled condenser (25) is connected, and the other is disconnected; If the recorded signals received by the control module are R1 and R2, the data center composite refrigeration device is in a heat pipe refrigeration mode, one of the first air-cooled condenser (2) and the second air-cooled condenser (25) is connected, and the other is disconnected; If the recorded signals received by the control module are Y1 and R2, the second air-cooled condenser (25) is connected, the first air-cooled condenser (2) is disconnected, and the data center composite refrigeration device is in heat pipe cooling mode; If the recorded signals received by the control module are R1 and Y2, the first air-cooled condenser (2) is connected, and the second air-cooled condenser (25) is disconnected, and the data center composite refrigeration device is in heat pipe cooling mode.

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