A fan refrigeration system with absorption refrigeration cycle and its use method

Abstract

The present invention relates to a fan refrigeration system with an absorption refrigeration cycle and a method for using the same, comprising an environmental condition acquisition device, an absorption circulation system, a first heat circulation system and a second heat circulation system; the environmental condition acquisition device comprises a temperature detection mechanism and a light detection mechanism, the absorption circulation system comprises a solution pump, an absorber, a second throttle valve, and a light radiation absorber; the first heat circulation system comprises a first auxiliary pump, a first throttle valve, an in-shell heat exchanger, a first switch valve, a second switch valve and a first heat dissipation mechanism; the second heat circulation system comprises the absorber, a second auxiliary pump and a second heat dissipation mechanism. The present invention achieves the effect of enhancing the heat dissipation of the system, ensures the normal operation of the fan, absorbs solar radiation, and plays the role of protecting the casing and providing an additional heat source at low temperatures.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control systems, in particular to a fan refrigeration system with an absorption refrigeration cycle and a use method thereof. Background Art

[0002] Most existing fan cooling systems control the degree of air cooling by controlling the gate, that is, when the temperature inside the fan is high, the air inlet is increased to enhance air cooling to achieve the purpose of lowering the fan temperature. When the temperature inside the fan is low, the air inlet is reduced or closed to reduce the heat dissipation and achieve the insulation effect. There are generally some shortcomings and limitations, mainly manifested in that the existing fan cooling system cannot take away the heat in time when the internal temperature is high due to limited external wind force, resulting in local high temperature. In addition, the existing fan cooling system is usually only equipped with a temperature sensor, and only relies on the temperature parameter control circulation system to change the transmission path, resulting in low heat dissipation efficiency. On sunny days, the top of the fan is subject to high solar radiation intensity, and the top of the casing will be high temperature, which is not conducive to the overall heat dissipation of the fan and affects the service life of the fan. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a fan refrigeration system with an absorption refrigeration cycle and a method of using the same, which can regulate the circulation system through multiple parameters and change the heat transfer path to enhance the heat dissipation effect and protect the top of the casing to ensure the normal operation of the fan.

[0004] To achieve the above object, the present invention adopts the following technical solution: a fan refrigeration system with an absorption refrigeration cycle, comprising an environmental condition acquisition device, an absorption cycle system, a first heat cycle system and a second heat cycle system;

[0005] The environmental condition acquisition device includes a temperature detection mechanism and a light detection mechanism. The temperature detection mechanism is installed in the fan casing to detect the temperature in the fan casing, and the light detection mechanism is installed on the top of the fan casing to detect the intensity of the external environmental light.

[0006] The absorption circulation system comprises a solution pump, an absorber, a second throttle valve, and a light radiation absorber;

[0007] The first heat cycle system includes a first auxiliary pump, a first throttle valve, an in-shell heat exchanger for heat dissipation of the gearbox and the generator, a first switch valve, a second switch valve and a first heat dissipation mechanism;

[0008] The second thermal circulation system includes the absorber, a second auxiliary pump, and a second heat dissipation mechanism. The light radiation absorber is installed on the top of the fan casing, and the first auxiliary pump, the second auxiliary pump, the first switch valve, the second switch valve, the absorber, the first throttle valve, the second throttle valve and the solution pump are installed inside the fan.

[0009] In a preferred embodiment: the first heat dissipation mechanism and the second heat dissipation mechanism are installed outside the fan casing and the air inlet flow channel faces the direction where the fan blades are located.

[0010] In a preferred embodiment: the output end of the solution pump is connected to the liquid phase input end of the light radiation absorber, the liquid phase output end of the light radiation absorber is connected to the input end of the second throttle valve, the output end of the second throttle valve is connected to the input end of the absorber, the output end of the absorber is connected to the input end of the solution pump, and the gas phase output end of the light radiation absorber is connected to the input end of the first heat dissipation mechanism; the output end of the first auxiliary pump is connected to the input end of the first throttle valve, the output end of the first throttle valve is connected to the input end of the shell heat exchanger, the output end of the shell heat exchanger is connected to the input end of the first switch valve and the input end of the absorber, the output end of the first switch valve is connected to the input end of the first heat dissipation mechanism and the input end of the second switch valve, the output end of the second switch valve and the output end of the first heat dissipation mechanism are connected to the input end of the first auxiliary pump; the output end of the second auxiliary pump is connected to the input end of the absorber, the output end of the absorber is connected to the input end of the second heat dissipation mechanism, and the output end of the second heat dissipation mechanism is connected to the input end of the second auxiliary pump.

[0011] The present invention also provides a method for using a fan refrigeration system with an absorption refrigeration cycle, using the above-mentioned fan refrigeration system with an absorption refrigeration cycle, comprising the following steps:

[0012] Step 1: Set the temperature threshold and light intensity threshold;

[0013] Step 2: Get temperature and light intensity;

[0014] Step 3: Control the fan thermal management system to operate according to the acquired parameters.

[0015] In a preferred embodiment: in step 1, the temperature threshold is the temperature threshold inside the fan casing measured by the environmental condition acquisition device, which is specifically expressed as:

[0016] Upper temperature threshold:

[0017] Temperature lower threshold:

[0018] in, It is the maximum safe operating temperature inside the fan casing; It is the minimum safe operating temperature inside the fan casing; It is the nominal temperature of the fan under rated load and rated operating environment conditions; is the safety margin, which is expressed as:

[0019]

[0020] in, is a basic safety margin based on material properties and design criteria, Consider the adjustment of safety margin due to environmental conditions. It is a safety margin adjusted based on historical operating data and performance test results.

[0021] In a preferred embodiment: in step 1, the light intensity threshold is the ambient light intensity threshold measured by the ambient condition acquisition device, specifically as follows:

[0022] Light intensity upper threshold:

[0023] Light intensity lower threshold:

[0024] in, is the maximum safe working light intensity inside the fan housing; is the minimum safe working light intensity inside the fan housing; It is the nominal light intensity of the fan under rated operating environment conditions; It is the fluctuation range of light intensity, which is determined according to the changes in ambient light and safety standards, and is specifically expressed as:

[0025]

[0026] in, is the range of ambient light intensity, measured or estimated, is the sensitivity of the device to changes in light intensity, the coefficient , They respectively represent the contribution weights of environmental changes and equipment sensitivity to the fluctuation range.

[0027] In a preferred embodiment: in step 3, when the sunlight intensity is greater than And the fan internal temperature is higher than , the solution pump, the first auxiliary pump and the second auxiliary pump are turned on, the first switch valve and the second switch valve are closed, the working fluid in the first heat cycle system flows out from the first auxiliary pump, passes through the first throttle valve, flows through the shell heat exchanger to absorb heat, and the working fluid flows into the absorption cycle system, the working fluid in the absorption cycle system flows through the absorber to release heat, flows through the solution pump, flows through the light radiation absorber to absorb heat, the liquid phase part of the working fluid flows back to the absorber through the light radiation absorber, the gas phase part of the working fluid flows through the first heat dissipation mechanism to release heat, and finally flows back to the first auxiliary pump; the working fluid in the second heat cycle system flows out from the second auxiliary pump, flows through the absorber to absorb heat, flows through the second heat dissipation mechanism to release heat, and finally flows back to the second auxiliary pump.

[0028] In a preferred embodiment: in step 3, when the intensity of sunlight is less than And the fan internal temperature is higher than , the solution pump is closed, the first auxiliary pump is opened, the second auxiliary pump is closed, the first switch valve is opened, the second switch valve is closed, the working fluid in the first heat cycle system flows out from the first auxiliary pump, passes through the first throttle valve, flows through the shell heat exchanger to absorb heat, flows through the first switch valve, flows through the heat dissipation mechanism to release heat, and finally flows back to the first auxiliary pump; the working fluid in the second heat cycle system and the absorption cycle system does not flow.

[0029] In a preferred embodiment: in step 3, when the sunlight intensity is greater than And the fan internal temperature is lower than , the solution pump is turned on, the first auxiliary pump is turned on, the second auxiliary pump is turned off, the first switch valve is closed, and the second switch valve is turned on. The working fluid in the first thermal cycle system flows out from the first auxiliary pump, passes through the first throttle valve, flows through the shell heat exchanger to release heat, and the working fluid flows into the absorption cycle system. The working fluid in the absorption cycle system flows through the absorber, flows through the solution pump, flows through the light radiation absorber to absorb heat, the liquid phase part of the working fluid flows back to the absorber through the light radiation absorber, and the gas phase part of the working fluid flows through the second switch valve, and finally flows back to the first auxiliary pump; the working fluid does not flow in the second thermal cycle system.

[0030] In a preferred embodiment: in step 3, when the intensity of sunlight is less than And the fan internal temperature is lower than , the solution pump is turned off, the first auxiliary pump is turned off, the second auxiliary pump is turned off, the first switch valve is closed, and the second switch valve is closed; the working fluid in the first thermal cycle system, the second thermal cycle system and the absorption cycle system does not flow.

[0031] Compared with the prior art, the present invention has the following beneficial effects: a first heat circulation system and a second heat circulation system are provided, and the heat dissipation of the system is enhanced by regulating two parameters to ensure the normal operation of the fan. An absorption circulation system is designed to absorb solar radiation, protect the casing and provide an additional heat source at low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0033] Figure 2 This is a layout diagram of the top components of a fan according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the measurement principle of the temperature detection mechanism according to an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the measurement principle of the light detection mechanism according to an embodiment of the present invention.

[0036] In the figure: 100-first heat circulation system; 200-absorption circulation system; 300-second heat circulation system; 101-first auxiliary pump; 102-first throttle valve; 103-shell heat exchanger; 104-first switch valve; 105-second switch valve; 106-first heat dissipation mechanism; 201-solution pump; 202-absorber; 203-second throttle valve; 204-light radiation absorber; 301-second auxiliary pump; 302-second heat dissipation mechanism, 400-air inlet, 500-fan blades. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0040] See also Figures 1 to 4, the present invention provides an embodiment: a fan refrigeration system with an absorption refrigeration cycle, comprising an environmental condition acquisition device, an absorption cycle system 200, a first heat cycle system 100 and a second heat cycle system 300;

[0041] The environmental condition acquisition device includes a temperature detection mechanism and a light detection mechanism; the temperature detection mechanism is installed in the fan casing and is used to detect the temperature in the fan casing. The measurement principle is as follows: Figure 3 As shown in the figure, it is composed of a thermistor and a Wheatstone bridge. In the unbalanced state, the four arms of the bridge are still composed of three known resistors (R1, R2 and R3) and a thermistor RT. The ammeter will measure the potential difference across the bridge, and reflect the change of the thermistor according to the imbalance of the bridge, and then calculate the temperature through the change of the thermistor resistance.

[0042] The light detection mechanism is installed on the top of the fan housing to detect the light intensity. The measurement principle is as follows: Figure 4 As shown in the figure, it is composed of a photoresistor and a Wheatstone bridge. In the unbalanced state, the four arms of the bridge are still composed of three known resistors (R1, R2 and R3) and a photoresistor RG. The ammeter will measure the potential difference between the two ends of the bridge, and reflect the change of the photoresistor according to the imbalance of the bridge, and then calculate the light intensity through the change of the resistance value of the photoresistor.

[0043] The absorption circulation system 200 includes a solution pump 201, an absorber 202, a second throttle valve 203, and a light radiation absorber 204; the first thermal circulation system 100 includes a first auxiliary pump 101, a first throttle valve 102, an in-shell heat exchanger 103 for heat dissipation of a gear box and a generator, a first switch valve 104, a second switch valve 105, and a first heat dissipation mechanism 106; the second thermal circulation system 300 includes the absorber 202, the second auxiliary pump 301, and the second heat dissipation mechanism 302, the first heat dissipation mechanism 106 and the second heat dissipation mechanism 302 are installed outside the fan casing and the air inlet 400 flow channel faces the direction where the fan blades 500 are located, the light radiation absorber 204 is installed on the top of the fan casing, and the first auxiliary pump 101, the second auxiliary pump 301, the first switch valve 104, the second switch valve 105, the absorber 202, the first throttle valve 102, the second throttle valve 203 and the solution pump 201 are installed inside the fan. The environmental condition acquisition device is used to detect the temperature and light intensity inside the fan casing; and the thresholds of the temperature and light intensity inside the fan casing are set through the existing intelligent control system. Different operating conditions are started through different fan casing temperatures and different light intensities to regulate the flow direction of the circulating system working fluid, adjust the heat transfer path, and achieve the thermal management requirements inside the fan and on the top of the casing.

[0044] Please continue reading Figure 1As shown, in one embodiment of the present invention, the output end of the solution pump 201 is connected to the liquid phase input end of the light radiation absorber 204, the liquid phase output end of the light radiation absorber 204 is connected to the input end of the second throttle valve 203, the output end of the second throttle valve 203 is connected to the input end of the absorber 202, the output end of the absorber 202 is connected to the input end of the solution pump 201, the gas phase output end of the light radiation absorber 204 is connected to the input end of the first heat dissipation mechanism 106, and the working fluid used in the absorption circulation system 200 is an aqueous solution of ammonia.

[0045] Ammonia has a higher latent heat of evaporation, which means that it can absorb more heat during the evaporation process, thereby providing higher refrigeration efficiency; since there are fewer system components and no high-speed mechanical parts, the maintenance cost of the ammonia absorption refrigeration system is lower; the working principle of the ammonia absorption refrigeration cycle is relatively simple, and the system components are relatively few, which reduces failure points and improves system reliability.

[0046] Please continue reading Figure 1 As shown, in one embodiment of the present invention, the output end of the first auxiliary pump 101 is connected to the input end of the first throttle valve 102, the output end of the first throttle valve 102 is connected to the input end of the shell heat exchanger 103, the output end of the shell heat exchanger 103 is connected to the input end of the first switch valve 104 and the input end of the absorber 202, the output end of the first switch valve 104 is connected to the input end of the first heat dissipation mechanism 106 and the input end of the second switch valve 105, the output end of the second switch valve 105 and the output end of the first heat dissipation mechanism 106 are connected to the input end of the first auxiliary pump 101, and the working fluid used in the first thermal cycle system is an aqueous solution of ammonia.

[0047] Please continue reading Figure 1 As shown, in one embodiment of the present invention, the output end of the second auxiliary pump 301 is connected to the input end of the absorber 202, the output end of the absorber 202 is connected to the input end of the second heat dissipation mechanism 302, the output end of the second heat dissipation mechanism 302 is connected to the input end of the second auxiliary pump 301, and the working fluid used in the second thermal circulation system is ethylene glycol aqueous solution.

[0048] See also Figure 1 to Figure 2 , the present invention provides another embodiment: the threshold range of the fan internal temperature and the threshold range of the sunlight intensity in the environmental condition acquisition device are respectively set to:

[0049] Upper temperature threshold:

[0050] Temperature lower threshold:

[0051] in, It is the maximum safe operating temperature inside the fan casing; It is the minimum safe operating temperature inside the fan casing; It is the nominal temperature of the fan under rated load and rated operating environment conditions; It is the safety margin, which is usually determined according to the material and design of the fan and can be expressed as:

[0052]

[0053] in, is a basic safety margin based on material properties and design criteria, Consider the adjustment of safety margin due to environmental conditions. It is a safety margin adjusted based on historical operating data and performance test results.

[0054] Light intensity upper threshold:

[0055] Light intensity lower threshold:

[0056] in, is the maximum safe working light intensity inside the fan housing; is the minimum safe working light intensity inside the fan housing; It is the nominal light intensity of the fan under rated operating environment conditions; It is the fluctuation range of light intensity, which is determined according to the changes in ambient light and safety standards, and is specifically expressed as:

[0057]

[0058] in, is the range of ambient light intensity, measured or estimated, is the sensitivity of the device to changes in light intensity, the coefficient , They respectively represent the contribution weights of environmental changes and equipment sensitivity to the fluctuation range, and can be set according to the historical operation data of the equipment.

[0059] When the intensity of sunlight is greater than And the fan internal temperature is higher than The switch valves, pumps and working medium flow directions are arranged as follows: the solution pump 201, the first auxiliary pump 101 and the second auxiliary pump 301 are turned on, the first switch valve 104 and the second switch valve 105 are turned off, the working medium in the first thermal cycle system 100 flows out from the first auxiliary pump 101, passes through the first throttle valve 102, flows through the shell heat exchanger 103 to absorb heat, and the working medium flows into the absorption cycle system 200, the working medium in the absorption cycle system 200 flows through the absorber 202 to release heat, flows through the solution pump 201, flows through the light radiation absorber 204 to absorb heat, the liquid phase part of the working medium flows back to the absorber 202 through the light radiation absorber 204, the gas phase part of the working medium flows through the first heat dissipation mechanism 106 to release heat, and finally flows back to the first auxiliary pump 101; the working medium in the second thermal cycle system flows out from the second auxiliary pump 301, flows through the absorber 202 to absorb heat, flows through the second heat dissipation mechanism 302 to release heat, and finally flows back to the second auxiliary pump 301. At this time, the temperature inside the fan and the intensity of sunlight are both higher than the threshold value, and the inside and top of the fan need to be cooled. The heat absorbed by the light radiation absorber 204 and the heat generated in the fan are dissipated into the environment through the absorption circulation system 200, the first heat circulation system 100 and the second heat circulation system 300, thereby cooling the inside of the fan and the top of the casing.

[0060] Please continue reading Figure 1 As shown, in one embodiment of the present invention, when the intensity of sunlight is less than And the fan internal temperature is higher than , the switch valves, pumps and working medium flow directions are set as follows: the solution pump 201 is closed, the first auxiliary pump 101 is opened, the second auxiliary pump 301 is closed, the first switch valve 104 is opened, the second switch valve 105 is closed, the working medium in the first heat cycle system 100 flows out from the first auxiliary pump, passes through the first throttle valve 102, flows through the shell heat exchanger 103 to absorb heat, flows through the first switch valve 104, flows through the heat dissipation mechanism to release heat, and finally flows back to the first auxiliary pump 101; the working medium in the second heat cycle system and the absorption cycle system 200 does not flow. At this time, the temperature inside the fan exceeds the threshold, and the temperature inside the fan needs to be dissipated. By starting the first heat cycle system 100 and the second heat cycle system 300, the heat generated in the fan is dissipated to the environment through the first heat cycle system 100 and the second heat cycle system 300.

[0061] Please continue reading Figure 1 As shown, in one embodiment of the present invention, when the intensity of sunlight is greater than And the fan internal temperature is lower than , the switch valves, each pump and the working medium flow direction are set as follows: the solution pump 201 is turned on, the first auxiliary pump 101 is turned on, the second auxiliary pump 301 is turned off, the first switch valve 104 is closed, and the second switch valve 105 is turned on. The working medium in the first thermal cycle system 100 flows out from the first auxiliary pump 101, passes through the first throttle valve 102, flows through the shell heat exchanger 103 to release heat, and the working medium flows into the absorption cycle system 200. The working medium in the absorption cycle system 200 flows through the absorber 202, flows through the solution pump 201, flows through the light radiation absorber 204 to absorb heat, the liquid phase part of the working medium flows back to the absorber 202 through the light radiation absorber 204, and the gas phase part of the working medium flows through the second switch valve 105, and finally flows back to the first auxiliary pump 101; the working medium does not flow in the second thermal cycle system. In this working condition, the temperature inside the fan is lower than the set threshold and the intensity of sunlight is higher than the set threshold. It is necessary to dissipate heat from the top of the fan and keep the inside of the fan warm. The first heat circulation system 100 is turned off, the absorption circulation system 200 is turned on, and the second heat circulation system 300 is turned on to use the heat radiated from the top of the fan for keeping the inside of the fan warm.

[0062] Please continue reading Figure 1 As shown, in one embodiment of the present invention, when the intensity of sunlight is less than And the fan internal temperature is lower than , the switch valves, pumps and working fluid flow directions are set as follows: the solution pump is turned off, the first auxiliary pump is turned off, the second auxiliary pump is turned off, the first switch valve is turned off, and the second switch valve is turned off; the working fluid in the first heat cycle system, the second heat cycle system and the absorption cycle system does not flow. In this working condition, the temperature in the fan and the intensity of sunlight are both lower than the set threshold value, and the fan needs to be kept warm. The first heat cycle system, the second heat cycle system and the absorption cycle system are all turned off, so as to reduce heat dissipation and achieve a heat preservation effect.

[0063] The above description is only a preferred embodiment of the present invention and should not be construed as limiting the present application. All equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A fan refrigeration system with an absorption refrigeration cycle, characterized in that: It includes an environmental condition acquisition device, an absorption circulation system, a first heat circulation system and a second heat circulation system; The environmental condition acquisition device includes a temperature detection mechanism and a light detection mechanism. The temperature detection mechanism is installed in the fan casing to detect the temperature in the fan casing, and the light detection mechanism is installed on the top of the fan casing to detect the intensity of the external environmental light. The absorption circulation system comprises a solution pump, an absorber, a second throttle valve, and a light radiation absorber; The first heat cycle system includes a first auxiliary pump, a first throttle valve, an in-shell heat exchanger for heat dissipation of the gearbox and the generator, a first switch valve, a second switch valve and a first heat dissipation mechanism; The second heat circulation system comprises the absorber, the second auxiliary pump, and the second heat dissipation mechanism, the light radiation absorber is installed on the top of the fan casing, and the first auxiliary pump, the second auxiliary pump, the first switch valve, the second switch valve, the absorber, the first throttle valve, the second throttle valve and the solution pump are installed inside the fan; The output end of the solution pump is connected to the liquid phase input end of the light radiation absorber, the liquid phase output end of the light radiation absorber is connected to the input end of the second throttle valve, the output end of the second throttle valve is connected to the first input end of the absorber, the first output end of the absorber is connected to the input end of the solution pump, and the gas phase output end of the light radiation absorber is connected to the input end of the first heat dissipation mechanism; the output end of the first auxiliary pump is connected to the input end of the first throttle valve, the output end of the first throttle valve is connected to the input end of the shell heat exchanger, the output end of the shell heat exchanger is connected to the input end of the first switch valve and the first input end of the absorber, the output end of the first switch valve is connected to the input end of the first heat dissipation mechanism and the input end of the second switch valve, the output end of the second switch valve and the output end of the first heat dissipation mechanism are connected to the input end of the first auxiliary pump; the output end of the second auxiliary pump is connected to the second input end of the absorber, the second output end of the absorber is connected to the input end of the second heat dissipation mechanism, and the output end of the second heat dissipation mechanism is connected to the input end of the second auxiliary pump.

2. A fan refrigeration system with an absorption refrigeration cycle according to claim 1, characterized in that: The first heat dissipation mechanism and the second heat dissipation mechanism are installed outside the fan casing and the air inlet flow channel faces the direction where the fan blades are located.

3. A method for using a fan refrigeration system with an absorption refrigeration cycle, characterized in that A fan refrigeration system with an absorption refrigeration cycle according to claim 1 or 2 comprises the following steps: Step 1: setting a temperature threshold inside the fan casing measured by the environmental condition acquisition device and an ambient light intensity threshold measured by the environmental condition acquisition device; Step 2: Obtain the internal temperature of the fan and the intensity of sunlight; Step 3: Control the fan thermal management system to operate according to the acquired parameters.

4. The method for using a fan refrigeration system with an absorption refrigeration cycle according to claim 3, characterized in that: In step 1, the temperature threshold inside the fan casing measured by the environmental condition acquisition device is specifically expressed as: Upper temperature threshold: Temperature lower threshold: in, It is the maximum safe operating temperature inside the fan casing; It is the minimum safe operating temperature inside the fan casing; It is the nominal temperature of the fan under rated load and rated operating environment conditions; is the safety margin, which is expressed as: in, is a basic safety margin based on material properties and design criteria, Consider the adjustment of safety margin due to environmental conditions. It is a safety margin adjusted based on historical operating data and performance test results.

5. The method for using a fan refrigeration system with an absorption refrigeration cycle according to claim 4, characterized in that: In step 1, the ambient light intensity threshold measured by the environmental condition acquisition device is specifically shown as follows: Light intensity upper threshold: Light intensity lower threshold: in, is the maximum safe working light intensity inside the fan housing; is the minimum safe working light intensity inside the fan housing; It is the nominal light intensity of the fan under rated operating environment conditions; It is the fluctuation range of light intensity, which is determined according to the changes in ambient light and safety standards, and is specifically expressed as: in, is the range of ambient light intensity, measured or estimated, is the sensitivity of the device to changes in light intensity, the coefficient , They respectively represent the contribution weights of environmental changes and equipment sensitivity to the fluctuation range.

6. The method for using a fan refrigeration system with an absorption refrigeration cycle according to claim 5, characterized in that: In step 3, when the sunlight intensity is greater than And the fan internal temperature is higher than , the solution pump, the first auxiliary pump and the second auxiliary pump are turned on, the first switch valve and the second switch valve are closed, the working medium in the first heat cycle system flows out from the first auxiliary pump, passes through the first throttle valve, flows through the shell heat exchanger to absorb heat, and the working medium flows into the absorption cycle system, the working medium in the absorption cycle system flows through the absorber to release heat, flows through the solution pump, flows through the light radiation absorber to absorb heat, the liquid phase part of the working medium flows back to the absorber through the light radiation absorber, the gas phase part of the working medium flows through the first heat dissipation mechanism to release heat, and finally flows back to the first auxiliary pump; The working fluid in the second heat cycle system flows out from the second auxiliary pump, flows through the absorber to absorb heat, flows through the second heat dissipation mechanism to release heat, and finally flows back to the second auxiliary pump.

7. The method for using a fan refrigeration system with an absorption refrigeration cycle according to claim 5, characterized in that: In step 3, when the sunlight intensity is less than And the fan internal temperature is higher than , the solution pump is closed, the first auxiliary pump is opened, the second auxiliary pump is closed, the first switch valve is opened, the second switch valve is closed, the working fluid in the first heat cycle system flows out from the first auxiliary pump, passes through the first throttle valve, flows through the shell heat exchanger to absorb heat, flows through the first switch valve, flows through the first heat dissipation mechanism to release heat, and finally flows back to the first auxiliary pump; The working medium in the second heat cycle system and the absorption cycle system does not flow.

8. The method for using a fan refrigeration system with an absorption refrigeration cycle according to claim 5, characterized in that: In step 3, when the sunlight intensity is greater than And the fan internal temperature is lower than , the solution pump is turned on, the first auxiliary pump is turned on, the second auxiliary pump is turned off, the first switch valve is closed, the second switch valve is turned on, the working medium in the first thermal cycle system flows out from the first auxiliary pump, passes through the first throttle valve, flows through the shell heat exchanger to release heat, and the working medium flows into the absorption cycle system. The working medium in the absorption cycle system flows through the absorber, flows through the solution pump, flows through the light radiation absorber to absorb heat, the liquid phase of the working medium flows back to the absorber through the light radiation absorber, and the gas phase of the working medium flows through the second switch valve, and finally flows back to the first auxiliary pump; The working medium does not flow in the second heat cycle system.

9. The method for using a fan refrigeration system with an absorption refrigeration cycle according to claim 5, characterized in that: In step 3, when the sunlight intensity is less than And the fan internal temperature is lower than , the solution pump is turned off, the first auxiliary pump is turned off, the second auxiliary pump is turned off, the first switch valve is closed, and the second switch valve is closed; the working fluid in the first thermal cycle system, the second thermal cycle system and the absorption cycle system does not flow.

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