High heat flux density base station environment cooling system and control method based on natural cold source

Abstract

The present invention discloses a high heat flux density base station environment cooling system and control method based on natural cold sources, including a natural cold source energy storage unit, a refrigeration unit circulation unit, an air cooling unit, and a refrigerant control unit. The natural cold source energy storage unit includes an air-cooled circulation pipeline passing through a phase change energy storage tank, and an air cooler and a first circulation pump are arranged on the air-cooled circulation pipeline. The evaporation pipeline of the refrigeration unit circulation unit passes through the phase change energy storage tank, and a cold supply circulation pipeline is arranged in the phase change energy storage tank. The cold supply circulation pipeline is connected to a refrigeration coil located at the base station air supply outlet through a second circulation pump. The air cooling unit includes a fan arranged at the base station air supply outlet. The refrigerant control unit includes a control module connected to the fan, the first circulation pump, the second circulation pump, and the refrigeration unit circulation unit, and the control module is connected to a temperature sensor unit. The present invention can make full use of natural cold sources to adjust the temperature of the base station and ensure the stability of the temperature in the communication base station at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of base station cooling systems, and in particular to a high heat flux density base station environment cooling system and control method based on natural cold sources. Background Art

[0002] With the rapid development of network communication technology and the continuous expansion of the user scale, the popularization of communication requires a large number of base station constructions, and the data transmission rate will also be much higher than that of previous networks. A high heat flux density base station is a core device specifically providing high-speed network services, which can realize wireless signal transmission between a wired communication network and a wireless terminal. With the doubling of the data transmission rate, the base station will also process a large amount of data, and the power consumption of the base station processing equipment will increase significantly. When the temperature exceeds a certain value, the generation of heat will increase significantly. As the temperature rises, the failure rate of electronic components increases exponentially, and the requirements for base station heat dissipation and electronic component heat dissipation will also increase.

[0003] Therefore, cooling the base station is a key factor to ensure the normal operation of the base station. To solve the problems in the prior art that the cooling reliability of communication base stations is relatively low, and the service life of electrical equipment in communication base stations is shortened due to frequent startup of air conditioners, a Chinese patent application for invention with the publication date of September 17, 2019 and the publication number of CN110602926A discloses a cooling method for a communication base station, including: detecting the in-station temperature inside the communication base station and the out-station temperature outside the communication base station; when the in-station temperature is higher than the set target temperature, determining the temperature difference between the in-station temperature and the out-station temperature outside the communication base station; and according to the temperature difference and the set temperature threshold, switching to a variable frequency air conditioner, a radiator, or a combination of a variable frequency air conditioner and a radiator to cool the communication base station.

[0004] However, the above cooling method for a communication base station monitors the temperature difference between the inside and outside of the base station and controls the timely operation of the variable frequency air conditioner and the radiator according to the difference. Compared with the traditional technology, although it can maintain the temperature stability of the communication base station to a certain extent, there are still the following deficiencies: First, only the monitored in-station temperature, out-station temperature, and the temperature difference between the in-station temperature and the ambient temperature are compared with the set target temperature and temperature difference threshold, and then regulated through a variable frequency air conditioner and a radiator, without considering the characteristics of the cooling equipment. Therefore, the stability of the in-station temperature of the communication base station still needs to be improved; Second, it completely relies on electric energy for temperature regulation, resulting in high energy consumption of the communication base station and unable to make full use of natural energy to perform low-energy consumption regulation of the temperature inside the communication base station. Summary of the Invention

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a high heat flux density base station environment cooling system and control method based on natural cold sources, which solves the technical problems of poor target temperature stability and high energy consumption when using existing communication base station cooling methods.

[0006] The technical solution of this application is as follows:

[0007] A high heat flux density base station environment cooling system based on natural cold sources includes a natural cold source energy storage unit, a refrigeration unit circulation unit, an air-cooling cooling unit, and a refrigerant control unit. The natural cold source energy storage unit includes an air-cooling circulation pipeline passing through a phase change energy storage box, and an air-cooler and a first circulation pump are arranged on the air-cooling circulation pipeline. The evaporation pipeline of the refrigeration unit circulation unit passes through the phase change energy storage box, and a cold supply circulation pipeline is arranged in the phase change energy storage box. The cold supply circulation pipeline is connected to a refrigeration coil located at the base station air supply port through a second circulation pump. The air-cooling cooling unit includes a fan arranged at the base station air supply port. The refrigerant control unit includes a control module connected to the fan, the first circulation pump, the second circulation pump, and the refrigeration unit circulation unit. The control module is connected to a temperature sensor unit, and the temperature sensor unit includes an external base station environment temperature sensor, a phase change energy storage box temperature sensor, and an internal base station environment temperature sensor.

[0008] Furthermore, it also includes a point-to-point efficient cooling unit. The point-to-point efficient cooling unit includes a small fan, and the small fan is arranged on one side of the high-temperature electronic components in the base station. The temperature sensor unit also includes an electronic component temperature sensor arranged on the high-temperature electronic components.

[0009] Furthermore, the point-to-point efficient cooling unit includes a heat exchanger connected in parallel with the refrigeration coil, and the heat exchanger is arranged on the heat generation surface of the high-temperature electronic components.

[0010] Furthermore, a return air duct is arranged between the fan and the base station. An electromagnetic valve connected to the control module is arranged in the return air duct. The return air port of the return air duct is opposite to the base station air supply port with respect to the high-temperature electronic components in the base station, and the air supply port of the return air duct is communicated with the air inlet of the fan.

[0011] Furthermore, the refrigerant pump outlet end of the air-cooling circulation pipeline is connected to the refrigerant return end of the cold supply circulation pipeline through a first three-way solenoid valve, and the refrigerant return end of the air-cooling circulation pipeline is connected to the refrigerant pump outlet end of the cold supply circulation pipeline through a second three-way solenoid valve. Both the first three-way solenoid valve and the second three-way solenoid valve are connected to the control module.

[0012] Furthermore, a rechiller is arranged between the part where the evaporation pipeline extends out of the phase change energy storage box and the part where the cold supply circulation pipeline extends out of the phase change energy storage box.

[0013] Further, the portions of the air-cooling circulation pipeline, the evaporation pipeline, and the cooling supply circulation pipeline located in the phase change energy storage box are all reciprocally folded S-shaped pipelines. In the phase change energy storage box, the air-cooling circulation pipeline and the evaporation pipeline intersect with each other and are located in the same phase change heat transfer material layer, and the cooling supply circulation pipeline is located in the phase change heat transfer material of the layer adjacent to the air-cooling circulation pipeline.

[0014] A control method for a high heat flux density base station environment cooling system based on natural cold sources, including the high heat flux density base station environment cooling system based on natural cold sources, includes an energy storage mode. In the energy storage mode, the base station external environment temperature sensor continuously detects the base station external environment temperature T. When the base station external environment temperature T detected by the base station external environment temperature sensor is lower than the freezing point T1 of the phase change heat transfer material, the control module controls the first circulation pump, the first three-way solenoid valve, and the second three-way solenoid valve to open the circulation pipeline connecting the air cooler and the phase change energy storage box, and the refrigerant starts to circulate in the cooling supply circulation pipeline. The refrigerant continuously releases heat to the external environment in the air cooler, and the temperature decreases. Subsequently, it is sent to the phase change energy storage box 7 through the cold quantity delivery pipe to exchange heat with the phase change heat transfer material and release cold quantity, and the phase change heat transfer material stores the cold quantity.

[0015] When the environment temperature sensor detects that the base station external environment temperature T is lower than the set temperature value T2, the control module controls the first circulation pump, the first three-way solenoid valve, and the second three-way solenoid valve to open the circulation pipeline connecting the air cooler, the refrigeration coil, and the heat exchanger, and the refrigerant starts to circulate. The refrigerant continuously releases heat to the external environment in the air cooler, and the refrigerant temperature decreases. Subsequently, the cold quantity of the refrigerant is sent to the refrigeration coil and the heat exchanger through the second three-way solenoid valve and acts together with the fan to cool the base station.

[0016] When the environment temperature sensor detects that the base station external environment temperature T is higher than the freezing point T1 of the phase change heat transfer material or higher than the set value T2, the control module controls the first circulation pump to stop working.

[0017] Further, it also includes an energy supply mode. In the energy supply mode, the control module controls the second circulation pump to be in an always-open state. The refrigerant in the phase change energy storage box is transported to the refrigeration coil and the heat exchanger through the cooling supply circulation pipeline and the second circulation pump, and under the combined action of the fan, it exchanges heat with the high-temperature electronic components and the fresh air.

[0018] When the phase change energy storage box temperature sensor detects that the temperature T3 of the phase change energy storage box is higher than the set temperature T4, the control module controls the refrigeration unit to operate. The refrigeration working medium in the evaporation pipeline cools the phase change energy storage box and the cooling supply circulation pipeline and at the same time leads to the rechiller to further cool the refrigerant flowing through the rechiller in the cooling supply circulation pipeline. Then, the refrigerant in the cooling supply circulation pipeline is transported to the refrigeration coil and the heat exchanger through the second circulation pump and acts together with the fan to exchange heat with the high-temperature electronic components and the fresh air.

[0019] When the temperature sensor of the phase change energy storage box detects that the temperature T3 of the phase change energy storage box is lower than the set temperature T4, the control module controls the refrigeration unit to stop working;

[0020] When the ambient temperature sensor in the base station detects that the ambient temperature T5 in the base station is higher than the ambient temperature T outside the base station, the control module controls the solenoid valve to open, so that the fresh air is mixed with the return air in the base station and then sent to the base station through the refrigeration coil to adjust the ambient temperature in the base station;

[0021] When the ambient temperature sensor in the base station detects that the ambient temperature T5 in the base station is lower than the ambient temperature T outside the base station, the control module controls the solenoid valve to close to avoid unnecessary use of cooling capacity;

[0022] When the temperature sensor of the electronic component detects that the temperature of the electronic component is higher than the set temperature, the control module controls the small fan to work to accelerate the heat exchange between the heat-generating surface of the electronic component and the heat exchanger.

[0023] Furthermore, it also includes an intelligent energy replenishment mode. In the intelligent energy replenishment mode, according to the different day-night temperature differences, seasonal temperature differences in different geographical locations, and the peak-valley electricity price rules, the refrigeration unit is controlled to turn on during the valley electricity price period at night through the operation time controller.

[0024] Compared with the prior art, the beneficial effects of the present invention include:

[0025] The present invention provides a high heat flux density base station environment cooling system based on natural cold sources, including five modules: a natural cold source energy storage unit, a refrigeration unit circulation unit, a point-to-point high-efficiency cooling unit, an air-cooled cooling unit, and a refrigerant control unit. Each module cooperates with each other, can make full use of natural cold sources, and at the same time ensure the stable temperature in the communication base station;

[0026] The natural cold source energy storage unit includes an air cooler, an air-cooled circulation pipeline, a phase change energy storage box, a three-way solenoid valve, a circulation pump, an ambient temperature sensor outside the base station, and a temperature sensor of the phase change energy storage box. When the external environment temperature where the air cooler is located is lower than the freezing point of the phase change heat transfer material in the phase change energy storage box, the refrigerant will continuously release heat to the outside, reducing its own temperature. Under the action of the circulation pump, the refrigerant circulates in the air-cooled circulation pipeline, transporting the cold energy in the air cooler to the phase change energy storage box to achieve the effect of cold storage. The refrigeration unit circulation unit connected to the phase change energy storage box includes a refrigeration unit, a sub-cooler, and an evaporation pipeline, which can work at night using the peak-valley electricity price policy of the region, realizing the simultaneous cold storage of natural cold sources and the refrigeration unit, and achieving the effect of supplementing cold energy when the energy storage of the phase change energy storage box is insufficient, and achieving the purpose of saving electricity costs;

[0027] The point-to-point efficient cooling unit includes a heat exchanger, an in-base station ambient temperature sensor, an electronic component temperature sensor, and a small fan. When the temperature sensor installed on the electronic component detects that the temperature of the electronic component is higher than the set temperature, the control system will control the small fan installed on the side of the electronic component to operate, accelerating the heat exchange between the heat-generating surface of the electronic component and the heat exchanger. The heat exchanger adopts a pasted installation method according to the installation structure characteristics of the electronic component, which can increase the contact area of heat exchange and enhance the cooling effect;

[0028] The air-cooling unit includes a return air duct, a fan, and a refrigeration coil. When the in-base station ambient temperature sensor installed in the base station environment detects that the ambient temperature is higher than the outside-base station ambient temperature, the return air duct solenoid valve opens, enabling the supply air to be mixed with the return air in the base station. The mixed supply air exchanges heat with the refrigeration coil installed in front of the fan, thereby blowing cold air into the base station for cooling; when the in-base station ambient temperature sensor detects that the in-base station ambient temperature T5 is lower than the outside-base station ambient temperature T, the control module controls the solenoid valve to close to avoid unnecessary use of cooling capacity;

[0029] The refrigerant control unit controls the switches of the fan, solenoid valve, three-way solenoid valve, circulation pump, and the small fan installed at the electronic component through real-time monitoring of the external environment, electronic components, and in-base station ambient temperature. For electronic components in different temperature states, the switch of the small fan can be controlled to achieve the purpose of cooling; for the temperature comparison between the base station and the external environment, the supply air ratio of the return air and fresh air can be controlled to achieve efficient cooling of the base station environment; for the comparison of the external environment temperature, set temperature, and the freezing point of the phase change material in the phase change energy storage tank, the switches of the circulation pump and three-way solenoid valve are controlled; for the comparison of the stored cooling capacity in the phase change energy storage tank and the set stored cooling capacity, the operation of the refrigeration unit is controlled to supplement the cooling capacity for the energy storage tank and ensure cold supply. Brief Description of the Drawings

[0030] In order to more clearly illustrate the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is the schematic diagram of the principle of the present invention;

[0032] Figure 2 is Figure 1 the cross-sectional view of the phase change energy storage tank in;

[0033] Figure 3 is the partial control schematic diagram of the control method of the present invention;

[0034] Figure 4 This is the control schematic diagram of the refrigeration unit in the control method of the present invention;

[0035] Reference numerals in the figure:

[0036] 1. Fan, 2. Refrigeration coil, 3. Second three-way solenoid valve, 4. Refrigeration unit, 5. Re-cooler, 6. Second circulation pump, 7. Phase change energy storage tank, 8. Control panel, 9. First three-way solenoid valve, 10. First circulation pump, 11. Plate-fin air cooler, 13. Return air duct, 14. Return air inlet, 15. Small fan, 16. Heat exchanger, 17. Supply air outlet, 18. Solenoid valve, 19. Air-cooled circulation pipeline, 20. Evaporation pipeline, 21. Cooling supply circulation pipeline, 22. Insulation board. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] A high heat flux density base station environment cooling system based on natural cold source, as Figure 1 and Figure 2 shown, includes a natural cold source energy storage unit, a refrigeration unit circulation unit, an air-cooled cooling unit, and a refrigerant control unit 8; the natural cold source energy storage unit absorbs cold from the natural environment outside the base station for cooling the base station; the refrigeration unit circulation unit plays an auxiliary role, and when the natural cold source energy storage unit cannot meet the cooling demand, the refrigeration unit circulation unit can be started to assist in cold storage or cooling; the air-cooled cooling unit and the natural cold source energy storage unit work together to deliver the cold of the natural cold source energy storage unit into the base station in the form of air cooling, which can effectively improve the stability of temperature control; the refrigerant control unit 8 is used to control the natural cold source energy storage unit, the refrigeration unit circulation unit, and the air-cooled cooling unit to work timely.

[0039] Specifically, the natural cold source energy storage unit includes an air-cooled circulation pipeline 19 passing through the phase change energy storage tank 7. An air cooler 11 and a first circulation pump 10 are arranged on the air-cooled circulation pipeline 19. The first circulation pump 10 circulates the refrigerant in the air-cooled circulation pipeline 19 between the air cooler 11 and the phase change energy storage tank 7, and releases heat and absorbs the cold in the environment through the heat exchange of the air cooler 11. The cold absorbed by the air-cooled circulation pipeline 19 can be directly used in cooperation with the air-cooled cooling unit to directly control the temperature in the base station, or the excess cold can be stored in the phase change heat exchange material in the phase change energy storage tank 7 for use when the natural cold in the environment outside the base station is insufficient.

[0040] The evaporation pipeline 20 of the refrigeration unit circulation unit passes through the phase change energy storage tank 7, and the evaporation pipeline 20 exchanges heat with the phase change heat transfer material in the phase change energy storage tank 7 to supplement cold energy to the phase change heat transfer material when the natural environmental cold energy outside the base station is insufficient.

[0041] A cooling supply circulation pipeline 21 is arranged in the phase change energy storage tank 7. The cooling supply circulation pipeline 21 is connected to a refrigeration coil 2 located at the air supply outlet 17 of the base station through a second circulation pump 6. The air-cooling cooling unit includes a fan 1 arranged at the air supply outlet 17 of the base station. The cooling supply circulation pipeline 21 can transport the cold energy stored in the phase change energy storage tank 7 to the refrigeration coil 2 through the second circulation pump 6. The fresh air conveyed by the fan 1 is secondarily cooled through the refrigeration coil 2 and then conveyed into the base station.

[0042] The refrigerant control unit 8 includes a control module connected to the fan 1, the first circulation pump 10, the second circulation pump 6 and the refrigeration unit circulation unit. The control module is connected to a temperature sensor unit. The temperature sensor unit includes an external environmental temperature sensor of the base station, a phase change energy storage tank temperature sensor, and an internal environmental temperature sensor of the base station. The refrigerant control unit 8 monitors the state values of the temperature sensors at various locations, compares the state values with each other and with the set values, and then controls the startup or shutdown of the fan 1, the first circulation pump 10, the second circulation pump 6 and the refrigeration unit circulation unit to adjust the refrigeration process in real time.

[0043] Furthermore, the first circulation pump 10 and the second circulation pump 6 are preferably fluorine pumps; the air cooler 11 is preferably a plate-type air cooler; the fan 1 is preferably a variable-frequency fan; the phase change energy storage tank is preferably made of a heat-insulating board 22; the air-cooling circulation pipeline 19, the evaporation pipeline 20, and the cooling supply circulation pipeline 21 are all preferably made of copper material, and the parts of the air-cooling circulation pipeline 19, the evaporation pipeline 20, and the cooling supply circulation pipeline 21 exposed to the external environment are all wrapped with heat-insulating materials.

[0044] On the basis of the above embodiments, as a preferred embodiment, the high heat flux density base station environment cooling system based on natural cold sources further includes a point-to-point efficient cooling unit. The point-to-point efficient cooling unit includes a small fan 15. The small fan 15 is arranged on one side of the high-temperature electronic components in the base station. The temperature sensor unit further includes an electronic component temperature sensor arranged on the high-temperature electronic components. The refrigerant control unit 8 controls the operating power or on-off of the small fan 15 in real time through the temperature value detected by the electronic component temperature sensor to achieve point-to-point efficient cooling control.

[0045] On the basis of the above embodiments, as a preferred embodiment, the point-to-point efficient cooling unit includes a heat exchanger 16 connected in parallel with the refrigeration coil 2, and the heat exchanger 16 is disposed on the heat generating surface of the high-temperature electronic component. As a preferred embodiment, the heat exchanger preferably uses a finned heat exchanger. The finned heat exchanger 16 is installed on the heat generating surface of the high-temperature electronic component and is installed in a pasted manner. After the cold quantity of the cold supply circulation pipeline 21 is transported to the finned heat exchanger 16, heat conduction and heat convection occur with the high-temperature electronic component, accelerating the heat dissipation of the high-temperature electronic component. The small fan 15 is installed on the side of the high-temperature electronic component to cool the electronic component by natural wind and has the effect of accelerating heat dissipation.

[0046] On the basis of the above embodiments, as a preferred embodiment, an air return pipe 13 is provided between the fan 1 and the base station. An electromagnetic valve 18 connected to the control module is provided in the air return pipe 13. According to the temperature adjustment requirement, the control module can adjust the air supply effect by controlling the electromagnetic valve 18; the air return port 14 of the air return pipe 13 is opposite to the air supply port 17 of the high-temperature electronic component in the base station, further improving the uniformity of heat exchange. The air supply port 15 of the air return pipe 13 is communicated with the air inlet of the fan 1.

[0047] Specifically, the refrigeration coil 2 is installed at the air supply port 17 of the base station and is located at the indoor end of the base station. The fan 1 is installed at the air supply port 17 and is located at the outdoor end of the base station. The refrigerant is sent to the refrigeration coil 2 at the air supply port 17 through the cold supply circulation pipeline 21, and the fan 1 is powered on to send air into the base station. The fresh air sent into the base station is mixed with the return air passing through the air return pipe 13 and then exchanges heat with the refrigeration coil 2 installed in front of the fan 1, so as to blow cold air into the base station for cooling. The electromagnetic valve 18 is preferably installed at the air return outlet to control the air return volume and the air supply ratio of the fresh air.

[0048] On the basis of the above embodiments, as a preferred embodiment, the refrigerant pump-out end of the air-cooled circulation pipeline 19 is connected to the refrigerant return end of the cold supply circulation pipeline 21 through a first three-way solenoid valve 9, and the refrigerant return end of the air-cooled circulation pipeline 19 is connected to the refrigerant pump-out end of the cold supply circulation pipeline 21 through a second three-way solenoid valve 3; both the first three-way solenoid valve 9 and the second three-way solenoid valve 3 are connected to the control module. By setting the first three-way solenoid valve 9 and the second three-way solenoid valve 3, the refrigerant in the air-cooled circulation pipeline 19 and the cold supply circulation pipeline 21 can be mixed. By controlling the two solenoid valves to conduct in different directions at different times, the mode of supplying cold to the base station can be changed, and the effective conversion rate of the cold quantity can be improved.

[0049] On the basis of the above-described embodiments, as a preferred embodiment, a rechiller 5 is provided between the portion where the evaporation pipeline 20 extends out of the phase change energy storage tank 7 and the portion where the cooling supply pipeline 21 extends out of the phase change energy storage tank 7. The refrigeration unit supplies the low-temperature and low-pressure refrigerant to the rechiller 5 and the phase change energy storage tank 7 through the evaporation pipeline 20 made of copper material wrapped with heat insulation material via a throttle valve for heat exchange, cools the cooling supply pipeline 21 of the phase change energy storage tank 7, and stores the remaining cold of the refrigerant in the phase change energy storage tank 7 after cooling. The rechiller 5 is preferably a shell-and-tube heat exchanger and is installed at the outlet of the cooling supply pipeline 21 of the phase change energy storage tank 7 to provide cold as a guarantee when the cold quantity of the natural cold source stored in the phase change energy storage tank 7 by the refrigeration unit 4 is insufficient.

[0050] On the basis of the above-described embodiments, as a preferred embodiment, the portions of the air-cooling circulation pipeline 19, the evaporation pipeline 20, and the cooling supply pipeline 21 located in the phase change energy storage tank 7 are all reciprocally folded S-shaped pipelines. In the phase change energy storage tank 7, the air-cooling circulation pipeline 19 and the evaporation pipeline 20 intersect with each other and are located in the same phase change heat exchange material layer, and the cooling supply pipeline 21 is located in the phase change heat exchange material of the adjacent layer of the air-cooling circulation pipeline 19, so as to fully improve the heat exchange efficiency and the cold quantity storage efficiency.

[0051] A control method for a high heat flux density base station environment cooling system based on natural cold source, as Figure 3 and Figure 4 shown, includes the high heat flux density base station environment cooling system based on natural cold source, including an energy storage mode. In the energy storage mode, the base station external environment temperature sensor continuously detects the base station external environment temperature T. When the base station external environment temperature T detected by the base station external environment temperature sensor is lower than the freezing point T1 of the phase change heat exchange material, the control module controls the first circulation pump 10, the first three-way solenoid valve 9, and the second three-way solenoid valve 3 to open the circulation pipeline connecting the air cooler 11 and the phase change energy storage tank 7, and the refrigerant starts to circulate in the cooling supply pipeline 21. The refrigerant continuously releases heat to the external environment in the air cooler 11, and the temperature decreases. Subsequently, it is sent to the phase change energy storage tank 7 through the cold quantity delivery pipe to exchange heat with the phase change heat exchange material and release cold quantity, and the phase change heat exchange material stores the cold quantity;

[0052] When the environment temperature sensor detects that the base station external environment temperature T is lower than the set temperature value T2, the control module controls the first circulation pump 10, the first three-way solenoid valve 9, and the second three-way solenoid valve 3 to open the circulation pipeline connecting the air cooler 11, the refrigeration coil 2, and the heat exchanger 16. The refrigerant starts to circulate. The refrigerant continuously releases heat to the external environment in the air cooler 11, and the refrigerant temperature decreases. Subsequently, the cold quantity of the refrigerant is sent to the refrigeration coil 2 and the heat exchanger 16 through the second three-way solenoid valve 3, and together with the fan 1, cools the base station;

[0053] When the ambient temperature sensor detects that the ambient temperature T outside the base station is higher than the solidification point T1 of the phase change heat transfer material or higher than the set value T2, the control module controls the first circulation pump 10 to stop working.

[0054] Furthermore, it also includes an energy supply mode. In this energy supply mode, the control module controls the second circulation pump 6 to be in a normally open state. The refrigerant in the phase change energy storage tank 7 is transported through the cooling supply pipeline 21 and the second circulation pump 6 to the refrigeration coil 2 and the heat exchanger 16, and under the combined action of the fan 1, it exchanges heat with the high-temperature electronic components and the fresh air.

[0055] When the temperature sensor of the phase change energy storage tank detects that the temperature T3 of the phase change energy storage tank 7 is higher than the set temperature T4, the control module controls the refrigeration unit 4 to operate. The refrigerant in the evaporation pipeline 20 cools the phase change energy storage tank 7 and the cooling supply pipeline 21 while leading to the subcooler 5 to further cool the refrigerant flowing through the subcooler 5 from the cooling supply pipeline 21. Then, the refrigerant in the cooling supply pipeline 21 is transported through the second circulation pump 6 to the refrigeration coil 2 and the heat exchanger 16, and under the combined action of the fan 1, it exchanges heat with the high-temperature electronic components and the fresh air.

[0056] When the temperature sensor of the phase change energy storage tank detects that the temperature T3 of the phase change energy storage tank 7 is lower than the set temperature T4, the control module controls the refrigeration unit 4 to stop working.

[0057] When the ambient temperature sensor inside the base station detects that the ambient temperature T5 inside the base station is higher than the ambient temperature T outside the base station, the control module controls the solenoid valve 18 to open, so that the fresh air is mixed with the return air inside the base station and then sent to the inside of the base station through the refrigeration coil 2 to adjust the ambient temperature inside the base station.

[0058] When the ambient temperature sensor inside the base station detects that the ambient temperature T5 inside the base station is lower than the ambient temperature T outside the base station, the control module controls the solenoid valve 18 to close to avoid unnecessary use of cooling capacity.

[0059] When the temperature sensor of the electronic components detects that the temperature of the electronic components is higher than the set temperature, the control module controls the small fan 15 to operate to accelerate the heat exchange between the heat-generating surface of the electronic components and the heat exchanger 16.

[0060] Furthermore, it also includes an intelligent energy replenishment mode. In this intelligent energy replenishment mode, according to the different day-night temperature differences, seasonal temperature differences in different geographical locations, and the peak-valley electricity price rules, the refrigeration unit 4 is controlled by the operation time controller to be turned on during the valley electricity price period at night.

[0061] The details not elaborated in the present invention are all well-known conventional technical means in the art.

[0062] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The high heat flux density base station environment cooling system based on natural cold source is characterized in that: It includes a natural cold source energy storage unit, a refrigeration unit circulation unit, an air-cooled cooling unit, and a refrigerant control unit (8). The natural cold source energy storage unit includes an air-cooled circulation pipeline (19) passing through a phase change energy storage tank (7). An air cooler (11) and a first circulation pump (10) are arranged on the air-cooled circulation pipeline (19). The evaporation pipeline (20) of the refrigeration unit circulation unit passes through the phase change energy storage tank (7). A cooling supply circulation pipeline (21) is arranged in the phase change energy storage tank (7). The cooling supply circulation pipeline (21) is connected to a refrigeration coil (2) located at the air supply outlet (17) of the base station through a second circulation pump (6). The air-cooled cooling unit includes a fan (1) arranged at the air supply outlet (17) of the base station. The refrigerant control unit (8) includes a control module connected to the fan (1), the first circulation pump (10), the second circulation pump (6), and the refrigeration unit circulation unit. The control module is connected to a temperature sensor unit. The temperature sensor unit includes an outdoor ambient temperature sensor of the base station, a phase change energy storage tank temperature sensor, and an indoor ambient temperature sensor of the base station; It further includes a point-to-point efficient cooling unit. The point-to-point efficient cooling unit includes a small fan (15). The small fan (15) is arranged on one side of the high-temperature electronic components in the base station. The temperature sensor unit further includes an electronic component temperature sensor arranged on the high-temperature electronic components; The point-to-point efficient cooling unit includes a heat exchanger (16) connected in parallel with the refrigeration coil (2). The heat exchanger (16) is arranged on the heat-generating surface of the high-temperature electronic components.

2. The high heat flux density base station environment cooling system based on natural cold source according to claim 1, wherein: A return air duct (13) is arranged between the fan (1) and the base station. A solenoid valve (18) connected to the control module is arranged in the return air duct (13). The return air outlet (14) of the return air duct (13) is opposite to the air supply outlet (17) of the base station with respect to the high-temperature electronic components in the base station. The air supply outlet (15) of the return air duct (13) is communicated with the air inlet of the fan (1).

3. The high heat flux density base station environment cooling system based on natural cold source according to claim 1, characterized in that: The refrigerant pump-out end of the air-cooled circulation pipeline (19) is connected to the refrigerant return end of the cooling supply circulation pipeline (21) through a first three-way solenoid valve (9). The refrigerant return end of the air-cooled circulation pipeline (19) is connected to the refrigerant pump-out end of the cooling supply circulation pipeline (21) through a second three-way solenoid valve (3). Both the first three-way solenoid valve (9) and the second three-way solenoid valve (3) are connected to the control module.

4. The high heat flux density base station environment cooling system based on natural cold source according to any one of claims 1-3, characterized in that: A rechiller (5) is arranged between the part where the evaporation pipeline (20) extends out of the phase change energy storage tank (7) and the part where the cooling supply circulation pipeline (21) extends out of the phase change energy storage tank (7).

5. The high heat flux density base station environment cooling system based on natural cold source according to claim 4, characterized in that: The parts of the air-cooled circulation pipeline (19), the evaporation pipeline (20), and the cooling supply circulation pipeline (21) located in the phase change energy storage tank (7) are all reciprocally folded S-shaped pipelines. In the phase change energy storage tank (7), the air-cooled circulation pipeline (19) and the evaporation pipeline (20) intersect with each other and are located in the same phase change heat transfer material layer. The cooling supply circulation pipeline (21) is located in the phase change heat transfer material of the adjacent layer of the air-cooled circulation pipeline (19).

6. Control method of high heat flux density base station environment cooling system based on natural cold source, characterized in that: It includes the high heat flux density base station environment cooling system based on natural cold source described in claim 5, including an energy storage mode. In the energy storage mode, the base station external environment temperature sensor continuously detects the base station external environment temperature T. When the base station external environment temperature T detected by the base station external environment temperature sensor is lower than the freezing point T1 of the phase change heat transfer material, the control module controls the first circulation pump (10), the first three-way solenoid valve (9), and the second three-way solenoid valve (3) to open the circulation pipeline connecting the air cooler (11) and the phase change energy storage tank (7). The refrigerant starts to circulate in the cooling supply pipeline (21). The refrigerant continuously releases heat to the external environment in the air cooler (11) and its temperature decreases. Subsequently, it is sent to the phase change energy storage tank 7 through the cold quantity delivery pipe to exchange heat with the phase change heat transfer material, releasing cold quantity, and the phase change heat transfer material stores the cold quantity. When the environment temperature sensor detects that the base station external environment temperature T is lower than the set temperature value T2, the control module controls the first circulation pump (10), the first three-way solenoid valve (9), and the second three-way solenoid valve (3) to open the circulation pipeline connecting the air cooler (11) with the refrigeration coil (2) and the heat exchanger (16). The refrigerant starts to circulate. The refrigerant continuously releases heat to the external environment in the air cooler (11), and the refrigerant temperature decreases. Subsequently, the cold quantity of the refrigerant is sent to the refrigeration coil (2) and the heat exchanger (16) through the second three-way solenoid valve (3), and together with the fan (1), it cools the base station. When the environment temperature sensor detects that the base station external environment temperature T is higher than the phase change heat transfer material freezing point T1 or higher than the set value T2, the control module controls the first circulation pump (10) to stop working.

7. The control method of the high heat flux density base station environment cooling system based on natural cold source according to claim 6, characterized in that: It includes an energy supply mode. In the energy supply mode, the control module controls the second circulation pump (6) to be in an always-open state. The refrigerant in the phase change energy storage tank (7) is transported to the refrigeration coil (2) and the heat exchanger (16) through the cooling supply pipeline (21) and the second circulation pump (6), and together with the fan (1), it exchanges heat with high-temperature electronic components and fresh air. When the phase change energy storage tank temperature sensor detects that the temperature T3 of the phase change energy storage tank (7) is higher than the set temperature T4, the control module controls the refrigeration unit (4) to operate. The refrigerant in the evaporation pipeline (20) cools the phase change energy storage tank (7) and the cooling supply pipeline (21) and at the same time leads to the rechiller (5) to further cool the refrigerant flowing through the rechiller (5) from the cooling supply pipeline (21). Then the refrigerant in the cooling supply pipeline (21) is transported to the refrigeration coil (2) and the heat exchanger (16) through the second circulation pump (6), and together with the fan (1), it exchanges heat with high-temperature electronic components and fresh air. When the phase change energy storage tank temperature sensor detects that the temperature T3 of the phase change energy storage tank (7) is lower than the set temperature T4, the control module controls the refrigeration unit (4) to stop working. When the base station internal environment temperature sensor detects that the base station internal environment temperature T5 is higher than the base station external environment temperature T, the control module controls the solenoid valve (18) to open, so that the fresh air is mixed with the base station internal return air and then sent to the base station through the refrigeration coil (2) to adjust the base station internal environment temperature. When the ambient temperature sensor inside the base station detects that the ambient temperature T5 inside the base station is lower than the ambient temperature T outside the base station, the control module controls the solenoid valve (18) to close to avoid unnecessary use of cooling capacity. When the temperature sensor of the electronic components detects that the temperature of the electronic components is higher than the set temperature, the control module controls the small fan (15) to operate to accelerate the heat exchange between the heat-generating surface of the electronic components and the heat exchanger (16).

8. The control method of the high heat flux density base station environment cooling system based on natural cold source according to claim 6 or 7, characterized in that: It includes an intelligent energy replenishment mode. In the intelligent energy replenishment mode, according to the different day-night temperature differences, seasonal temperature differences, and peak-valley electricity price rules in different geographical locations, the operation time controller is used to control the refrigeration unit (4) to turn on during the valley electricity price period at night.

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