A cabinet heat dissipation control method and system based on solar power supply

Abstract

This application relates to a cabinet heat dissipation control method and system powered by solar energy, belonging to the technical field of air conditioners, and it includes the following steps: obtaining the cabinet temperature T and the photovoltaic output power P; when P ≥ the limit value P' of the power required by the load in the cabinet, comparing T with the first preset low temperature value T2'; if T > T2', then power the air conditioner through photovoltaic and set the cooling temperature of the air conditioner to T2; if T ≤ T2', then keep the air conditioner off; where T2' = T2 + △T2, T2 is the low temperature limit, △T2 is the low temperature threshold, and T2' < T0, T0 is the phase change temperature T0 of the phase change material; when P < P' and T < the second preset high temperature value T1'', then keep the air conditioner off and release cold through the phase change material to reduce the cabinet temperature; where T1'' = T1 - △T1, T1 is the high temperature limit, △T1 is the high temperature threshold; when P < P' and T > T1, turn on the air conditioner and set the cooling temperature of the air conditioner to T1.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a cabinet heat dissipation control method and system based on solar power supply. Background Art

[0002] Batteries are widely used in the communication field. However, in many communication stations, the operating environment temperature of the batteries is very unfavorable for the battery life. Especially for the batteries deployed in outdoor cabinets, the batteries are sensitive to the working temperature, and their ideal working temperature range is relatively narrow, generally in the twenties. Working at a lower temperature will shorten the discharge time, and working at a higher temperature will shorten the battery life. At present, the performance of many batteries in outdoor cabinets drops significantly within less than two years, and they have to be replaced, which not only requires purchasing new batteries but also wastes a lot of manpower and material resources. Currently, air conditioners are generally used in outdoor cabinets to dissipate heat from the batteries. However, only using air conditioners for heat dissipation, with continuous refrigeration, the natural cold source of the day-night temperature difference cannot be utilized, resulting in relatively high energy consumption.

[0003] In related technologies, on the one hand, using renewable energy sources such as solar energy and wind energy to achieve refrigeration and heating is a commonly used energy-saving measure at present. However, the significant drawback of these renewable energy sources is their remarkable intermittency and instability. The energy supply amounts are different in different time periods such as day and night, summer or winter, etc., so their available time is limited. For example, in a photovoltaic power supply system, solar energy supplies power to the load and charges the battery during the day. In the daytime of high-temperature seasons with sufficient sunlight, there is an excess of power generation, resulting in waste of light.

[0004] On the other hand, the phase change energy storage technology using phase change materials has the characteristics of large energy storage density and small temperature change during the energy storage process. Combining the phase change materials with the cabinet system to store and release cold energy at different time periods can reduce the operation time of the air conditioner and effectively reduce the air conditioner energy consumption. However, the traditional cold energy storage method using phase change materials is realized by using air as the heat transfer medium for heat exchange, and there is a problem of single operating condition in the ventilation system, which cannot meet the cooling demand at different time periods. Summary of the Invention

[0005] Embodiments of this application provide a cabinet heat dissipation control method and system based on solar power supply to solve the problems in related technologies that solar refrigeration and heating are intermittent and unstable, and phase change materials cannot meet the cooling demand at different time periods.

[0006] In a first aspect, a cabinet heat dissipation control method based on solar power supply is provided. A phase change energy storage unit is provided in the cabinet, and the method includes the following steps:

[0007] Obtain the temperature T inside the cabinet and the photovoltaic output power P, and compare P with the limit value P' of the power required by the load inside the cabinet;

[0008] When P≥P', compare T with the first preset low temperature value T2'; if T>T2', supply power to the air conditioner through photovoltaics and set the cooling temperature of the air conditioner to T2, so that the phase change material of the phase change energy storage unit stores cold; if T≤T2', keep the air conditioner off; where T2' = T2+ΔT2, T2 is the low temperature limit, ΔT2 is the low temperature threshold, and T2'<T0, T0 is the phase change temperature T0 of the phase change material;

[0009] When P<P' and T<the second preset high temperature value T1'', keep the air conditioner off and release cold through the phase change material to reduce the temperature inside the cabinet; where T1'' = T1-ΔT1, T1 is the high temperature limit, and ΔT1 is the high temperature threshold;

[0010] When P<P' and T>T1, turn on the air conditioner and set the cooling temperature of the air conditioner to T1.

[0011] In some embodiments, the following steps are further included:

[0012] When T≥the first preset high temperature value T1', turn on the air conditioner and set the cooling temperature of the air conditioner to T1, where T1' = T1+ΔT1.

[0013] In some embodiments, when P≥P', compare T with the low temperature limit T2' inside the cabinet; specifically, the following steps are included:

[0014] When P≥P', determine whether the air conditioner is running;

[0015] If the air conditioner is running, supply power to the air conditioner through photovoltaics and set the cooling temperature of the air conditioner to T2;

[0016] If the air conditioner is not running, determine the relationship between T and T2';

[0017] If T>T2', turn on the air conditioner, supply power to the air conditioner through photovoltaics, and set the cooling temperature of the air conditioner to T2;

[0018] If T≤T2', keep the air conditioner off.

[0019] In some embodiments, when P<P' and T<the second preset high temperature value T1'', keep the air conditioner off and release cold through the phase change material to reduce the temperature inside the cabinet; specifically, the following steps are included:

[0020] When P<P' and T<T1'', determine whether the air conditioner is running;

[0021] If the air conditioner is running, turn off the air conditioner;

[0022] If the air conditioner is not running, keep the air conditioner off;

[0023] Not until T > T1, then turn on the air conditioner and set the cooling temperature of the air conditioner to T1.

[0024] In some embodiments, when P < P' and T > T1, turn on the air conditioner and set the cooling temperature of the air conditioner to T1; specifically, it includes the following steps:

[0025] When P < P' and T > T1, determine whether the air conditioner is running;

[0026] If the air conditioner is running, set the cooling temperature of the air conditioner to T1;

[0027] If the air conditioner is not running, turn on the air conditioner and set the cooling temperature of the air conditioner to T1.

[0028] In some embodiments, the phase change energy storage unit further includes a plurality of gravity heat pipes. The gravity heat pipes include a heat pipe insulation section, and a heat pipe condensation section and a heat pipe evaporation section provided at both ends of the heat pipe insulation section; the heat pipe evaporation section is embedded in the phase change material; the phase change material is provided in the cabinet, and the heat pipe condensation section extends outside the cabinet.

[0029] In some embodiments, the cabinet includes an equipment compartment and a battery compartment stacked up and down. A battery pack unit and an air conditioner are provided in the battery compartment, and the phase change material is provided in the battery compartment.

[0030] In some embodiments, an access hole is provided at the top of the equipment compartment. The heat pipe condensation section is vertically arranged and extends outside the equipment compartment through the access hole.

[0031] In some embodiments, an access hole is provided on the side wall of the battery compartment. The heat pipe condensation section is inclined upward and extends outside the battery compartment through the access hole.

[0032] In a second aspect, a cabinet heat dissipation control system based on solar power supply is provided, which includes:

[0033] A cabinet, in which an air conditioner is provided;

[0034] A photovoltaic power supply unit, which is used to supply power to the air conditioner;

[0035] A phase change energy storage unit, which is provided in the cabinet;

[0036] A sensor unit, which is used to obtain the temperature T inside the cabinet;

[0037] A controller unit, which is connected to the sensor unit, the photovoltaic power supply unit, and the air conditioner, and the controller unit is used to obtain the photovoltaic output power P and compare P with the limit value P' of the power required by the load inside the cabinet; and,

[0038] When P ≥ P', compare T with the first preset low temperature value T2'; if T > T2', supply power to the air conditioner through photovoltaics and set the cooling temperature of the air conditioner to T2 so that the phase change material of the phase change energy storage unit stores cold; if T ≤ T2', keep the air conditioner off; where T2' = T2 + ΔT2, T2 is the low temperature limit, ΔT2 is the low temperature threshold, and T2' < T0, T0 is the phase change temperature T0 of the phase change material;

[0039] When P < P' and T < the second preset high temperature value T1'', keep the air conditioner off and release cold through the phase change material to reduce the temperature inside the cabinet; where T1'' = T1 - ΔT1, T1 is the high temperature limit, and ΔT1 is the high temperature threshold;

[0040] When P < P' and T > T1, turn on the air conditioner and set the cooling temperature of the air conditioner to T1.

[0041] The beneficial effects brought by the technical solution provided in this application include:

[0042] 1) According to the solar power supply situation in different time periods, combined with the characteristics of large energy storage density of the phase change material, it is possible to control the turning on and off of the air conditioner and accurately and quickly switch the operation of different working conditions of the air conditioner, extend the solar energy utilization time, and improve the energy utilization rate.

[0043] 2) Utilize solar photovoltaics and phase change material energy storage to control the battery pack within the ideal working range, improving the reliability and service life of the battery pack. Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0045] Figure 1 It is a flowchart of the cabinet heat dissipation control method based on solar power supply provided in the embodiments of this application;

[0046] Figure 2 It is a schematic structural diagram of the phase change energy storage unit provided in the embodiments of this application;

[0047] Figure 3 It is a schematic structural diagram of the cabinet provided in the embodiments of this application (the gravity heat pipe is vertically arranged);

[0048] Figure 4 It is a schematic structural diagram of the cabinet provided in the embodiments of this application (the gravity heat pipe is inclined);

[0049] Figure 5 It is the composition diagram of the cabinet heat dissipation control system powered by solar energy provided by the embodiments of the present application;

[0050] Figure 6 It is the composition diagram of the control function provided by the embodiments of the present application;

[0051] Figure 7 It is the composition diagram of the power supply function provided by the embodiments of the present application;

[0052] Figure 8 It is the internal logic composition diagram of the controller unit provided by the embodiments of the present application.

[0053] In the figure: 1. Equipment cabin; 11. Controller unit; 111. Core control module; 112. Power quantity processing module; 113. Temperature judgment module; 114. Air conditioner scheduling module; 12. Load unit; 13. Sensor unit; 14. Photovoltaic power supply unit; 2. Battery cabin; 21. Battery pack unit; 22. Air conditioner; 3. Phase change energy storage unit; 31. Gravity heat pipe; 32. Phase change material; 311. Heat pipe condensation section; 312. Heat pipe heat insulation section; 313. Heat pipe evaporation section. Specific embodiments

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0055] Embodiment 1:

[0056] Refer to Figure 1 As shown, Embodiment 1 of the present application provides a cabinet heat dissipation control method powered by solar energy. A phase change energy storage unit 3 is provided in the cabinet, and it includes the following steps:

[0057] 100: Obtain the temperature T inside the cabinet and the photovoltaic output power P, and compare P with the limit value P' of the power required by the load inside the cabinet;

[0058] The high-temperature limit value T1 is set according to the limit value of the operating temperature of the battery pack unit 21 inside the cabinet and is set to 35 degrees. The high-temperature threshold △T1 is set to 2 degrees, and the maximum allowable temperature inside the cabinet is in the range of 33 - 37.

[0059] 101: When P ≥ P', compare T with the first preset low temperature value T2'; if T > T2', supply power to the air conditioner (22) through photovoltaics, and set the cooling temperature of the air conditioner (22) to T2, so that the phase change material (32) of the phase change energy storage unit (3) stores cold; if T ≤ T2', keep the air conditioner (22) closed; where T2' = T2 + ΔT2, T2 is the low temperature limit, ΔT2 is the low temperature threshold, and T2' < T0, T0 is the phase change temperature T0 of the phase change material (32);

[0060] P' is the sum of the power required by the load in the cabinet and the power threshold. If the photovoltaic output power P ≥ P', it indicates that there is surplus photovoltaic power, such as the case when solar energy is sufficient at noon during the day. Since there is surplus photovoltaic power at this time, the surplus power can be used to supply the air conditioner 22, and the air conditioner 22 is operated to T2, so that the temperature in the cabinet is further reduced. The load and battery in the cabinet can work in a suitable low temperature environment, greatly improving the reliability. At the same time, the surplus solar energy is fully utilized, and the energy utilization rate is relatively high. Moreover, the phase change temperature T0 of the phase change material 32 of the phase change energy storage unit 3 in the cabinet is greater than T2. At this time, the phase change material 32 will undergo a phase transition and store cold, storing the cold energy of the air conditioner 22 for standby.

[0061] 102: When P < P' and T < the second preset high temperature value T1'', keep the air conditioner (22) closed, and release cold through the phase change material (32) to reduce the temperature in the cabinet; where T1'' = T1 - ΔT1, T1 is the high temperature limit, and ΔT1 is the high temperature threshold;

[0062] When the cabinet temperature reaches T1, it means that the cold energy of the phase change material 32 in Embodiment 1 of the present application has been completely released. Therefore, when the photovoltaic output power is insufficient and the cabinet temperature has not reached T1, the cold energy released by the phase change material 32 can be used to reduce the cabinet temperature, without the need to turn on the air conditioner, reducing the working time of the air conditioner 22 and saving the energy consumption of the air conditioner 22.

[0063] 103: When P < P' and T > T1, turn on the air conditioner (22), and set the cooling temperature of the air conditioner (22) to T1.

[0064] When T > T1, it means that the cold energy of the phase change material 32 in Embodiment 1 of the present application has been completely released. At this time, it is necessary to turn on the air conditioner 22 to cool down, and set the cooling temperature of the air conditioner 22 to T1, just to ensure the normal operation of the battery. When the photovoltaic output power is sufficient, supply power to the air conditioner 22 through photovoltaics, and set the cooling temperature of the air conditioner 22 to T2, so that the phase change material 32 of the phase change energy storage unit 3 stores cold, completing the cycle.

[0065] The cabinet heat dissipation control method based on solar power supply in Embodiment 1 of the present application can control the turning on and off of the air conditioner according to the solar power supply situation in different time periods, and combine the characteristics of large energy storage density of the phase change material, and can accurately and quickly switch the operation of different working conditions of the air conditioner, reduce the operation time of the air conditioner, improve the utilization rate of solar energy, and achieve energy conservation and emission reduction.

[0066] Optionally, Embodiment 1 of the present application further includes the following steps:

[0067] 200: When T ≥ the first preset high temperature value T1', turn on the air conditioner 22, and set the cooling temperature of the air conditioner 22 to T1, where T1' = T1 + ΔT1.

[0068] When T ≥ T1', it indicates that the temperature inside the cabinet has exceeded the high temperature limit value. Too high ambient temperature will affect the service life of the battery pack, and it is necessary to use the air conditioner 22 to dissipate heat from the environment inside the cabinet. At this time, it is necessary to turn on the air conditioner 22.

[0069] Further, in step 101, when P ≥ P', compare T with the low temperature limit value T2' inside the cabinet; specifically, it includes the following steps:

[0070] 300: When P ≥ P', determine whether the air conditioner 22 is running;

[0071] Since this step may come from 200, it is necessary to determine whether the air conditioner 22 is running.

[0072] 301: If the air conditioner 22 is running, supply power to the air conditioner 22 through photovoltaic power generation, and set the cooling temperature of the air conditioner 22 to T2;

[0073] If the air conditioner 22 is running, it means that the cooling temperature of the air conditioner 22 has not reached T1. Since the photovoltaic output power is sufficient, it can be directly switched to supply power to the air conditioner 22 through photovoltaic power generation to improve the energy utilization rate.

[0074] 302: If the air conditioner 22 is not running, determine the relationship between T and T2';

[0075] If the air conditioner 22 is not running, it means that the temperature inside the cabinet is not greater than T1 at this time.

[0076] 303: If T > T2', turn on the air conditioner 22, supply power to the air conditioner 22 through photovoltaic power generation, and set the cooling temperature of the air conditioner 22 to T2;

[0077] If T > T2', then the phase change temperature T0 of the phase change material 32 has not been reached, and the phase change material cannot store cold. Therefore, it is necessary to turn on the air conditioner 22, supply power to the air conditioner 22 through photovoltaic power generation, reduce the temperature inside the cabinet again, and set it to T2 to enable the phase change material 32 to store cold.

[0078] 304: If T ≤ T2', keep the air conditioner 22 off.

[0079] If T ≤ T2', it indicates that the phase change temperature T0 of the phase change material 32 has been reached at this time, and the phase change material 32 is storing cold. Then there is no need to turn on the air conditioner 22, which reduces the working time of the air conditioner and saves air conditioner energy consumption. When T > T2', supply power to the air conditioner 22 through photovoltaic power generation again, lower the temperature inside the cabinet again, and set it to T2 to enable the phase change material 32 to store cold.

[0080] Further, in step 102, when P < P' and T < the second preset high temperature value T1'', keep the air conditioner 22 off and release cold through the phase change material 32 to lower the temperature inside the cabinet; specifically, it includes the following steps:

[0081] 400: When P < P' and T < the second preset high temperature value T1'', determine whether the air conditioner 22 is running;

[0082] Since this step may also come from step 200, determine whether the air conditioner 22 is running.

[0083] 401: If the air conditioner 22 is running, turn off the air conditioner 22;

[0084] Since the temperature inside the cabinet is higher than the phase change temperature T0 of the phase change material 32 at this time, but has not reached T1, it indicates that the phase change material 32 is releasing cold, so there is no need to turn on the air conditioner 22 for cooling.

[0085] 402: If the air conditioner 22 is not running, keep the air conditioner 22 off;

[0086] 403: Until T > T1, then turn on the air conditioner 22 and set the cooling temperature of the air conditioner 22 to T1.

[0087] When T > T1, it indicates that the cold of the phase change material 32 has been completely released and the temperature inside the cabinet cannot be lowered anymore. Moreover, at this time, the photovoltaic output power is insufficient. To ensure the normal operation of the battery, it is necessary to turn on the air conditioner 22 to ensure the safety of the battery operation.

[0088] Further, in step 103, when P < P' and T > T1, turn on the air conditioner 22 and set the cooling temperature of the air conditioner 22 to T1; specifically, it includes the following steps:

[0089] 500: When P < P' and T > T1, determine whether the air conditioner 22 is running;

[0090] Since this step may also come from step 200, determine whether the air conditioner 22 is running.

[0091] 501: If the air conditioner 22 is running, set the cooling temperature of the air conditioner 22 to T1;

[0092] If the air conditioner 22 is running, directly set the cooling temperature of the air conditioner 22 to T1 to ensure the safety of the battery operation.

[0093] 502: If the air conditioner 22 is not running, turn on the air conditioner 22 and set the cooling temperature of the air conditioner 22 to T1.

[0094] If the air conditioner 22 is not running, it is necessary to turn on the air conditioner 22 and set the cooling temperature of the air conditioner 22 to T1 to ensure the safety of the battery operation.

[0095] Optionally, refer to Figure 2 As shown, the phase change energy storage unit 3 further includes a plurality of gravity heat pipes 31. The gravity heat pipe 31 includes a heat pipe insulation section 312, and a heat pipe condensation section 311 and a heat pipe evaporation section 313 provided at both ends of the heat pipe insulation section 312; the heat pipe evaporation section 313 is embedded in the phase change material 32; the phase change material 32 is provided in the cabinet, and the heat pipe condensation section 311 extends outside the cabinet.

[0096] The gravity heat pipe 31 of Embodiment 1 of the present application is composed of a heat pipe condensation section 311, a heat pipe insulation section 312, and a heat pipe evaporation section 313. Adding the gravity heat pipe 31 to the phase change energy storage unit 3 utilizes the low-temperature environment at night for heat dissipation, reduces the operation time of the air conditioner, and is more energy-efficient; a metal shell is provided outside the gravity heat pipe 31, and its external shape is a smooth tube cylinder or cuboid, and can also be a cylinder or cuboid with external fins. The heat pipe evaporation section 313 can be embedded in the phase change material. In Embodiment 1 of the present application, the heat pipe condensation section 311 is arranged outside the cabinet, and the specific implementation manner can be close to the outer side wall of the cabinet, outside the cabinet, etc. Optimally, heat sinks or fans can be added at the outer side wall of the cabinet to facilitate enhanced heat dissipation of the heat pipe condensation section 311.

[0097] The phase change material 32 is a substance with a large latent heat of fusion. This substance can be used for passive energy storage and release at its melting temperature, and has the characteristics of large energy storage density and small temperature change during the energy storage process, so it has extensive energy storage value. The phase change material 32 is a mixture of organic matter, inorganic matter, and thickener, such as inorganic hydrated salts, paraffin, or organic-inorganic composite materials, etc., and will not cause any harmful effects on the surrounding environment. In Embodiment 1 of the present application, the phase change temperature of the phase change material 32 is within the working temperature range of the cabinet. For example, a phase change material with a phase change temperature of 29 degrees can be selected. When the external environment temperature of the cabinet is as high as over thirty degrees, the temperature inside the cabinet still remains below thirty degrees, which can effectively reduce the temperature inside the cabinet and greatly extend the service life of the storage battery inside the cabinet.

[0098] The gravity heat pipe 31 relies on the evaporation of the working fluid in the evaporation section 313 of the heat pipe and the condensation in the condensation section 311 of the heat pipe, enabling heat to be transferred from the evaporation section to the condensation section. It is a heat transfer superconductor. Embedding the gravity heat pipe 31 in the phase change material 32 can improve the heat exchange efficiency of the phase change energy storage unit 3.

[0099] The number of gravity heat pipes 31 can be flexibly set according to the heat dissipation requirements of the actual system. In Embodiment 1 of this application, a gravity heat pipe bundle is adopted, which has a simple structure, can be produced in a standardized and serialized manner, and is convenient for operation and maintenance.

[0100] See Figure 3 As shown, the cabinet includes an equipment compartment 1 and a battery compartment 2 stacked vertically. The battery compartment 2 is provided with a battery pack unit 21 and an air conditioner 22, and the phase change material 32 is arranged in the battery compartment 2.

[0101] The cabinet is divided into two compartments. One compartment is the equipment compartment 1, and the other compartment is the battery compartment 2. The evaporation section assembly of the phase change energy storage unit 3 is arranged inside the battery compartment 2, and the condensation section assembly is arranged outside the cabinet. The inside of the battery compartment 2 mainly consists of a battery pack unit 21 and an air conditioner 22, and the battery pack unit 21 provides backup power for various devices in the equipment compartment 1. In Embodiment 1 of this application, a vertical compartment deployment method is adopted, and a left-right compartment deployment method can also be adopted according to actual needs.

[0102] See Figure 3 As shown, an access hole is provided at the top of the equipment compartment 1, and the heat pipe condensation section 311 is arranged vertically and extends out of the equipment compartment 1 through the access hole.

[0103] From Figure 1 As can be seen, the phase change energy storage unit 3 adopts an overall vertical deployment method. An access hole is provided at the top of the cabinet for some components of the phase change energy storage unit 3 to extend outside the cabinet and exchange heat with the external environment, so as to obtain the best heat exchange performance.

[0104] See Figure 4 As shown, an access hole is provided on the side wall of the battery compartment 2, and the heat pipe condensation section 311 is arranged obliquely upward and extends out of the battery compartment 2 through the access hole.

[0105] From Figure 4 it can be known that the phase change energy storage unit 3 adopts an inclined deployment method. An access hole is provided on the side wall of the cabinet for some components in the phase change energy storage unit 3 to extend outside the cabinet and exchange heat with the external environment. According to the actual system configuration requirements, the Figure 1 or Figure 2 deployment method can be adopted.

[0106] Embodiment 2:

[0107] See Figures 5 - 8As shown in the figure, Embodiment 2 of the present application provides a cabinet heat dissipation control system powered by solar energy, which includes:

[0108] A cabinet, in which an air conditioner 22 is provided;

[0109] A photovoltaic power supply unit 14, which is used to supply power to the air conditioner 22;

[0110] A phase change energy storage unit 3, which is arranged in the cabinet;

[0111] A sensor unit 13, which is used to obtain the temperature T inside the cabinet;

[0112] A controller unit 11, which is connected to the sensor unit 13, the photovoltaic power supply unit 14, and the air conditioner 22, and the controller unit 11 is used to obtain the photovoltaic output power P and compare P with the limit value P' of the power required by the load inside the cabinet; and,

[0113] When P≥P', compare T with the first preset low temperature value T2'; if T>T2', supply power to the air conditioner 22 through the photovoltaic power, and set the cooling temperature of the air conditioner 22 to T2, so that the phase change material 32 of the phase change energy storage unit 3 stores cold; if T≤T2', keep the air conditioner 22 closed; where T2' = T2 + △T2, T2 is the low temperature limit, △T2 is the low temperature threshold, and T2'<T0, T0 is the phase change temperature T0 of the phase change material 32;

[0114] When P<P', and T<the second preset high temperature value T1'', keep the air conditioner 22 closed, and release cold through the phase change material 32 to reduce the temperature inside the cabinet; where T1'' = T1 - △T1, T1 is the high temperature limit, and △T1 is the high temperature threshold;

[0115] When P<P', and T>T1, turn on the air conditioner 22 and set the cooling temperature of the air conditioner 22 to T1.

[0116] The cabinet in Embodiment 2 of the present application is divided into two compartments. One compartment is the equipment compartment 1, and the other compartment is the battery compartment 2. The evaporation section assembly of the phase change energy storage unit 3 is arranged inside the battery compartment 2, and the condensation section assembly is arranged outside the cabinet. The inside of the battery compartment 2 is mainly composed of a battery pack unit 21 and an air conditioner 22, and the battery pack unit 21 provides backup power for various devices in the equipment compartment 1.

[0117] The controller unit 11 can be a single-chip microcomputer controller, which is used to control the on and off and operating states of the air conditioner 22 according to parameters such as photovoltaic power, load heat generation, and real-time temperature inside the cabinet, and cooperate with the phase change energy storage unit 3 to realize the refined adjustment of the environmental temperature inside the cabinet.

[0118] The load unit 12 is a communication device. These communication devices in the cabinet will dissipate heat into the cabinet according to different power levels, causing the temperature inside the cabinet to rise. When the cabinet is placed outdoors, the outdoor temperature fluctuates greatly, which will also affect the ambient temperature inside the cabinet in a sealed state. The battery pack unit 21 is sensitive to the ambient temperature. When operating at a lower temperature, the discharge time will be shortened. When operating at a higher temperature, the battery life will be shortened and the possibility of thermal runaway will increase. Therefore, it is necessary to control the temperature of the cabinet environment.

[0119] The sensor unit 13 is a temperature sensor, which can measure the ambient temperature inside the cabinet and is electrically connected to the controller unit 11 to transmit the temperature inside the cabinet to the controller unit 11 in real time, so that the controller unit 11 can adjust the control method in time.

[0120] The solar photovoltaic panels outside the cabinet are connected in series and parallel to generate high-voltage direct current. The photovoltaic power supply unit 14 can convert the high-voltage direct current into a low-voltage direct current power supply on the one hand, and convert the high-voltage direct current into an alternating current power supply through a photovoltaic inverter on the other hand, and then control the power on and off of each device in the cabinet through a power distribution module.

[0121] The function of the air conditioner unit 22 is to provide cooling and heat dissipation functions for the cabinet environment.

[0122] See Figure 6 As shown, between the controller unit 11 of Embodiment 2 of the present application and the load unit 12, the sensor unit 13, the photovoltaic power supply unit 14, the air conditioner unit 15, and the battery pack unit 21, electrical connection and information communication are carried out through signal lines.

[0123] See Figure 7 As shown, the photovoltaic power supply unit 14 can provide electrical energy for the load unit 12, the air conditioner unit 22, and the battery pack unit 21.

[0124] See Figure 8 As shown, the internal logic of the controller unit 11 is mainly composed of modules such as a core control module 111, a power processing module 1112, a temperature judgment module 113, and an air conditioner scheduling module 114. The core control module 111, as the center of key control and global scheduling, has electrical connection and information communication with other modules. The power processing module 112 is used to obtain the power that the solar photovoltaic panel can provide, and the power required by the load unit 12, the battery pack unit 21, and the air conditioner 22 inside the cabinet in real time, and make a comparison and judgment. The temperature judgment module 113 is used to obtain the current temperature inside the cabinet from the sensor unit 13 and compare and judge it with the temperature limit value set by the core control module 111. The air conditioner scheduling module 114 is used to perform real-time scheduling on the air conditioner unit 22 according to the instructions of the core control module 111, such as turning on, turning off, adjusting variables, etc.

[0125] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0126] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0127] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A cabinet heat dissipation control method based on solar power supply, wherein a phase change energy storage unit (3) is provided in the cabinet, and it is characterized in that It includes the following steps: Obtain the temperature T inside the cabinet and the photovoltaic output power P, and compare P with the limit value P' of the power required by the load inside the cabinet; When P≥P', determine whether the air conditioner (22) is running; If the air conditioner (22) is running, supply power to the air conditioner (22) through the photovoltaic, and set the cooling temperature of the air conditioner (22) to T2, so that the phase change material (32) of the phase change energy storage unit (3) stores cold, where T2 is the low temperature limit; If the air conditioner (22) is not running, determine the relationship between T and T2', where T2' = T2 + △T2, T2 is the low temperature limit, △T2 is the low temperature threshold, and T2' < T0, T0 is the phase change temperature T0 of the phase change material (32); If T > T2', turn on the air conditioner (22), supply power to the air conditioner (22) through the photovoltaic, and set the cooling temperature of the air conditioner (22) to T2; If T ≤ T2', keep the air conditioner (22) off; When P < P' and T < the second preset high temperature value T1'', keep the air conditioner (22) off, and release cold through the phase change material (32) to reduce the temperature inside the cabinet; where T1'' = T1 - △T1, T1 is the high temperature limit, and △T1 is the high temperature threshold; When T ≥ the first preset high temperature value T1', turn on the air conditioner (22) and set the cooling temperature of the air conditioner (22) to T1, where T1' = T1 + △T1.

2. The cabinet heat dissipation control method based on solar power supply according to claim 1, characterized in that, When P < P' and T < the second preset high temperature value T1'', keep the air conditioner (22) off, and release cold through the phase change material (32) to reduce the temperature inside the cabinet; specifically including the following steps: When P < P' and T < T1'', determine whether the air conditioner (22) is running; If the air conditioner (22) is running, turn off the air conditioner (22); If the air conditioner (22) is not running, keep the air conditioner (22) off; Until T > T1, then turn on the air conditioner (22) and set the cooling temperature of the air conditioner (22) to T1.

3. The solar power supply-based cabinet heat dissipation control method according to claim 1, characterized in that When P < P' and T > T1, turn on the air conditioner (22) and set the cooling temperature of the air conditioner (22) to T1; specifically including the following steps: When P < P' and T > T1, determine whether the air conditioner (22) is running; If the air conditioner (22) is running, set the cooling temperature of the air conditioner (22) to T1; If the air conditioner (22) is not running, turn on the air conditioner (22) and set the cooling temperature of the air conditioner (22) to T1.

4. The solar-powered cabinet heat dissipation control method according to claim 1, wherein The phase change energy storage unit (3) further includes a plurality of gravity heat pipes (31), the gravity heat pipes (31) include a heat pipe insulation section (312), and a heat pipe condensation section (311) and a heat pipe evaporation section (313) provided at both ends of the heat pipe insulation section (312); the heat pipe evaporation section (313) is embedded in the phase change material (32); the phase change material (32) is provided inside the cabinet, and the heat pipe condensation section (311) extends outside the cabinet.

5. The cabinet heat dissipation control method based on solar power supply according to claim 4, wherein The cabinet includes an equipment compartment (1) and a battery compartment (2) stacked up and down, the battery compartment (2) is provided with a battery pack unit (21) and an air conditioner (22), and the phase change material (32) is provided inside the battery compartment (2).

6. The solar-powered cabinet heat dissipation control method according to claim 5, wherein An access hole is provided at the top of the equipment compartment (1), and the heat pipe condensation section (311) is arranged vertically and extends out of the equipment compartment (1) through the access hole.

7. The solar-powered cabinet heat dissipation control method according to claim 5, characterized in that An access hole is provided on the side wall of the battery compartment (2), and the heat pipe condensation section (311) is arranged obliquely upward and extends out of the battery compartment (2) through the access hole.

8. A cabinet heat dissipation control system powered by solar energy, characterized in that, It includes: A cabinet with an air conditioner (22) installed therein; A photovoltaic power supply unit (14) for supplying power to the air conditioner (22); A phase change energy storage unit (3) arranged in the cabinet; A sensor unit (13) for obtaining the temperature T inside the cabinet; A controller unit (11) connected to the sensor unit (13), the photovoltaic power supply unit (14), and the air conditioner (22), and the controller unit (11) is used to obtain the photovoltaic output power P and compare P with the limit value P' of the power required by the load inside the cabinet; and, When P≥P', determine whether the air conditioner (22) is running; If the air conditioner (22) is running, supply power to the air conditioner (22) through photovoltaic power and set the cooling temperature of the air conditioner (22) to T2 so that the phase change material (32) of the phase change energy storage unit (3) stores cold, where T2 is the low temperature limit; If the air conditioner (22) is not running, determine the relationship between T and T2', where T2' = T2 + △T2, T2 is the low temperature limit, △T2 is the low temperature threshold, and T2' < T0, where T0 is the phase change temperature T0 of the phase change material (32); If T > T2', turn on the air conditioner (22), supply power to the air conditioner (22) through photovoltaic power, and set the cooling temperature of the air conditioner (22) to T2; If T≤T2', keep the air conditioner (22) off; When P < P' and T < the second preset high temperature value T1'', keep the air conditioner (22) off and release cold through the phase change material (32) to reduce the temperature inside the cabinet; where T1'' = T1 - △T1, T1 is the high temperature limit, and △T1 is the high temperature threshold; When T≥the first preset high temperature value T1', turn on the air conditioner (22) and set the cooling temperature of the air conditioner (22) to T1, where T1' = T1 + △T1.

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