A heat dissipation method for an inverter air conditioner

Abstract

The application discloses a kind of top-mounted energy storage air-cooled air conditioner heat dissipation methods, comprising: compressor, three-phase heat exchanger I, three-phase heat exchanger II, outer fan, inner fan, capillary, water pump, expansion water kettle, drying tank and air bellow;Form two independent first cavity and second cavity in air bellow interior, set up inner fan and three-phase heat exchanger II in first cavity, set up outer fan and three-phase heat exchanger I in first cavity;And based on this, it is constructed that refrigerant circulation system and cooling water circulation system.The application can select refrigerant circulation system or cooling water circulation system work according to the temperature of external environment and the return air temperature of air bellow, to meet the heat dissipation demand of air-cooled system under the condition of higher ambient temperature, while meeting the use frequency of compressor is reduced when ambient temperature is lower, reduce power consumption, improve system efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the field of new energy storage and heat dissipation, in particular to a top-mounted energy storage air-cooled air conditioner heat dissipation method. BACKGROUND

[0002] With the development of technology and environmental protection demand worldwide, new energy technology is more and more popular, and has attracted widespread attention in the fields of transportation, power, photovoltaic, wind power and the like. The relevant industry worldwide has carried out extensive research on the application of power batteries in this field. Through energy storage products, the working efficiency of the power grid can be better adjusted to realize the composite application values of peak clipping, valley filling, new energy fluctuation suppression and energy management.

[0003] As the core component of the energy storage system, the over-high temperature in the lithium ion battery pack of the energy storage product can cause the shortening of the service life of the battery; under low temperature conditions, the discharge capacity can be significantly reduced; and the uneven temperature distribution in the battery pack can cause uneven distribution of the lithium battery capacity, shortening the service life of the overall battery pack.

[0004] In order to reduce the highest temperature of the battery and improve the service life of the battery cell, the cooled gas can be passed through the heat dissipation structure to reduce the temperature of the battery by convection. Referring to the accompanying drawings Figure 1 The core components of the traditional air-cooled air conditioner system include a compressor, a condenser, an evaporator, a blower and an expansion valve and the like. The air is cooled by the air conditioner system, passes through the battery cell and the heat dissipation structure to achieve the purpose of cooling. Referring to the accompanying drawings Figure 2 and Figure 3 The battery module is arranged in the cabinet, and the top air-cooled air conditioner is horizontally arranged. The blower sends the cold air to each battery module for cooling, and then the air is drawn back to the evaporator for cooling.

[0005] The current top air-cooled energy storage air conditioner structure is relatively cramped, and the system structure is extremely compact. It is necessary to arrange a condenser and a radiator in a small space, which can greatly increase the resistance of the system and reduce the refrigerating capacity under high temperature conditions, thereby reducing the heat management performance of the system.

[0006] In addition, due to the consideration of dust prevention, insulation and the like, the battery system is in a closed system, and cooling is only carried out by the air conditioner. When the compressor is not started or damaged, the battery system cannot be cooled, which results in the need to use the compressor for refrigeration work throughout the year, especially in winter. During the charging and discharging process of the energy storage system, a large amount of heat energy is emitted, and the compressor still needs to be started for refrigeration, which results in high power consumption, low annual efficiency of the energy storage system, increased use cost of the air-cooled system and reduced user benefits. SUMMARY

[0007] In order to solve the above technical problems, the purpose of the present application is to provide a top-mounted energy storage air-cooled air conditioner heat dissipation method to meet the cooling, cooling and high efficiency heat management requirements of the energy storage system, and to meet the temperature uniformity requirements of the battery through the heat dissipation structure with air-cooled fins, to meet the heat dissipation requirements of the air-cooled system under the condition of high ambient temperature, and to reduce the use frequency of the compressor when the ambient temperature is low, reduce power consumption and improve system efficiency.

[0008] The purpose of the present application is achieved by the following technical solutions.

[0009] A top-mounted energy storage air-cooled air conditioner heat dissipation method, comprising: a compressor, a three-phase heat exchanger I, a three-phase heat exchanger II, an outer fan, an inner fan, a capillary tube, a water pump, an expansion water kettle, a drying tank and an air bellow.

[0010] The outlet of the compressor is connected to the liquid inlet of the refrigerant chamber of the three-phase heat exchanger I, the liquid outlet of the refrigerant chamber of the three-phase heat exchanger I is connected to the inlet of the drying tank, the outlet of the drying tank is connected to the inlet of the capillary tube, the outlet of the capillary tube is connected to the liquid inlet of the refrigerant chamber of the three-phase heat exchanger II, the liquid outlet of the refrigerant chamber of the three-phase heat exchanger II is connected to the inlet of the compressor, and a refrigerant circulation system is formed.

[0011] The water outlet of the water pump is connected to the water inlet of the cooling liquid water chamber of the three-phase heat exchanger I, and the water outlet of the water pump and the water inlet of the cooling liquid water chamber of the three-phase heat exchanger I are also connected to the expansion water kettle.

[0012] The air bellow has independent first and second cavities, the inner fan and the three-phase heat exchanger II are arranged in the first cavity, the three-phase heat exchanger II is arranged obliquely in the first cavity, and the inner fan is arranged on the side of the three-phase heat exchanger II; a circulating air inlet and a circulating air outlet are arranged on the bottom surface of the air bellow and communicate with the inside of the first cavity, and the circulating air inlet and the circulating air outlet are respectively located on the two sides of the three-phase heat exchanger II; the air bellow is arranged on the top of the energy storage cabinet, and the circulating air inlet and the circulating air outlet are used to communicate with the inside of the energy storage cabinet; the outer fan and the three-phase heat exchanger I are arranged in the second cavity of the air bellow, the three-phase heat exchanger I is arranged obliquely in the second cavity, and the outer fan is arranged on the side of the three-phase heat exchanger I; and an air inlet and an air outlet are arranged on the opposite two side surfaces of the air bellow along the second cavity and communicate with the inside of the second cavity.

[0013] First, the return air temperature of the three-phase heat exchanger II in the first cavity is detected in real time, and it is judged whether the return air temperature is higher than a set high temperature threshold;

[0014] If the return air temperature of the three-phase heat exchanger II is higher than the set high temperature threshold, the compressor is started, the refrigerant circulation system is used to dissipate heat from the energy storage cabinet; during the operation of the refrigerant circulation system, it is judged whether the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, if the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, the refrigerant circulation system continues to work, and if the return air temperature of the three-phase heat exchanger II is lower than / equal to the set low temperature threshold, the operation is stopped;

[0015] If the return air temperature of the three-phase heat exchanger II is lower than / equal to the set high temperature threshold, it is further judged whether the external environment temperature is higher than the set environment temperature threshold; if the external environment temperature is higher than the set environment temperature threshold, the compressor is started, and the refrigerant circulation system is used to dissipate heat from the energy storage cabinet; if the external environment temperature is lower than / equal to the set environment temperature threshold, the cooling liquid circulation system is used to dissipate heat from the energy storage cabinet; during the operation of the cooling liquid circulation system, it is judged whether the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, if the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, the cooling liquid circulation system continues to work, and if the return air temperature of the three-phase heat exchanger II is lower than / equal to the set low temperature threshold, the operation is stopped.

[0016] In the above technical scheme, the three-phase heat exchanger I and the three-phase heat exchanger II are the same structure, both of which adopt a three-phase heat exchanger structure, which comprises a refrigerant chamber, a cooling liquid water chamber and a heat dissipation fin, wherein the cooling liquid water chamber comprises a first cooling liquid water chamber body, a second cooling liquid water chamber body and an intermediate cooling liquid connecting pipe, the first cooling liquid water chamber body and the second cooling liquid water chamber body are both rectangular pipes, and are arranged in parallel and spaced apart, the number of the intermediate cooling liquid connecting pipes is multiple, and they are arranged in parallel and spaced apart, the two ends of each intermediate cooling liquid connecting pipe are connected with the first cooling liquid water chamber body and the second cooling liquid water chamber body respectively, and a water inlet is arranged on the first cooling liquid water chamber body and a water outlet is arranged on the second cooling liquid water chamber body; the refrigerant chamber comprises a first refrigerant chamber body, a second refrigerant chamber body and an intermediate refrigerant connecting pipe, the first refrigerant chamber body is embedded in the first cooling liquid water chamber body, the second refrigerant chamber body is embedded in the second cooling liquid water chamber body, the number of the intermediate refrigerant connecting pipes is multiple and arranged side by side with the intermediate cooling liquid connecting pipes, the two ends of each intermediate refrigerant connecting pipe are connected with the first refrigerant chamber body and the second refrigerant chamber body respectively, and a partition is arranged in the first refrigerant chamber body and the second refrigerant chamber body, forming a structure that the intermediate refrigerant connecting pipes are connected in series, a liquid inlet and a liquid outlet are arranged on the first refrigerant chamber body; the heat dissipation fin is arranged on the intermediate cooling liquid connecting pipe and the intermediate refrigerant connecting pipe, and can dissipate heat from the intermediate cooling liquid connecting pipe and the intermediate refrigerant connecting pipe.

[0017] In the technical scheme, the intermediate refrigerant connecting pipe penetrates the pipe wall of the cooling liquid water chamber main body, and the penetrating position is filled with solder for sealing to prevent the cooling liquid water chamber main body from leaking.

[0018] In the technical scheme, the first temperature detection sensor is arranged at the circulating air inlet in the first cavity to detect the return air temperature of the three-phase heat exchanger II.

[0019] In the technical scheme, the air bellow is a rectangular box body, and a partition plate is arranged in the air bellow to form two independent first and second cavities.

[0020] In the technical scheme, when the refrigerant circulation system is used, the compressor, the inner fan and the outer fan work; when the cooling liquid circulation system is used, the inner fan, the outer fan and the water pump work.

[0021] In the technical scheme, the set high temperature threshold is 28 DEG C.

[0022] In the technical scheme, the set low temperature threshold is 25 DEG C.

[0023] In the technical scheme, the set ambient temperature threshold is 12 DEG C.

[0024] The advantages and beneficial effects of the present application are as follows:

[0025] The three-phase heat exchanger structure of the present application can realize the arrangement of the heat exchanger in a small space while having the ability of refrigerant heat exchange, cooling liquid heat exchange and wind power heat exchange.

[0026] The present application forms two independent first and second cavities in a top-mounted air bellow, and an inner fan and a three-phase heat exchanger II are arranged in the first cavity, and an outer fan and a three-phase heat exchanger I are arranged in the first cavity; and based on this, a refrigerant circulation system (i.e. a compressor-based air conditioning system) and a cooling water circulation system are constructed. When working, the present application can select the refrigerant circulation system or the cooling water circulation system to work according to the temperature of the external environment and the return air temperature of the air bellow, so as to meet the heat dissipation requirement of the air cooling system under the condition of high ambient temperature, and reduce the use frequency of the compressor when the ambient temperature is low, reduce the power consumption and improve the system efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of a traditional air-cooled air conditioning system.

[0028] Figure 2 It is a structural schematic diagram of a top-mounted horizontal air-cooled air conditioner cooling an energy storage cabinet.

[0029] Figure 3The principle diagram of the energy storage cabinet cooled by the top-mounted horizontal air-cooled air conditioner.

[0030] Figure 4 The structural principle diagram of the three-phase heat exchanger of the present application.

[0031] Figure 5 The structural diagram of the three-phase heat exchanger of the present application.

[0032] Figure 6 The circulation structural principle diagram of the energy storage air-cooled air conditioner system of the present application.

[0033] Figure 7 The structural schematic diagram of the energy storage air-cooled air conditioner system of the present application.

[0034] Figure 8 The structural schematic diagram of the energy storage air-cooled air conditioner system of the present application.

[0035] Figure 9 The structural schematic diagram of the energy storage air-cooled air conditioner system of the present application.

[0036] Figure 10 The working method principle diagram of the energy storage air-cooled air conditioner system of the present application. DETAILED DESCRIPTION

[0037] The technical solutions of the present application are further illustrated below in combination with specific embodiments.

[0038] Embodiment one

[0039] A three-phase heat exchanger, referring to the attached Figure 4 and the attached Figure 5, the three-phase heat exchanger is a whole rectangular plate structure, which comprises a refrigerant chamber, a cooling liquid water chamber and a heat dissipation fin, wherein the cooling liquid water chamber comprises a first cooling liquid water chamber body 11, a second cooling liquid water chamber body 12 and an intermediate cooling liquid connecting pipe 12, the first cooling liquid water chamber body 11 and the second cooling liquid water chamber body 12 are both rectangular pipes (flat tubes), and are arranged in parallel and spaced apart, the intermediate cooling liquid connecting pipe 13 is multiple and arranged in parallel and spaced apart, and the two ends of each intermediate cooling liquid connecting pipe are connected with the first cooling liquid water chamber body and the second cooling liquid water chamber body respectively, so as to realize the communication between the first cooling liquid water chamber body and the second cooling liquid water chamber body, and the water inlet 14 is arranged on the first cooling liquid water chamber body, and the water outlet 15 is arranged on the second cooling liquid water chamber body; the refrigerant chamber comprises a first refrigerant chamber body 21, a second refrigerant chamber body 22 and an intermediate refrigerant connecting pipe 23, the first refrigerant chamber body 21 is embedded in the first cooling liquid water chamber body 11, the second refrigerant chamber body 22 is embedded in the second cooling liquid water chamber body 12, the intermediate refrigerant connecting pipe 23 is multiple and arranged side by side with the intermediate cooling liquid connecting pipe 13, the two ends of each intermediate refrigerant connecting pipe 23 are connected with the first refrigerant chamber body 21 and the second refrigerant chamber body 22 respectively (the intermediate refrigerant connecting pipe will pass through the pipe wall of the cooling liquid water chamber body, and the through part needs to be filled with solder for sealing to prevent the cooling liquid water chamber body from leaking), and a partition is arranged in the first refrigerant chamber body 21 and the second refrigerant chamber body 22, forming a structure that the intermediate refrigerant connecting pipes 23 are connected in series (that is, the first refrigerant chamber body 21, the second refrigerant chamber body 22 and the intermediate refrigerant connecting pipes 23 form a serpentine channel), and the liquid inlet 24 and the liquid outlet 25 are arranged on the first refrigerant chamber body; the heat dissipation fin 3 is arranged on the intermediate cooling liquid connecting pipe 13 and the intermediate refrigerant connecting pipe 23, and can dissipate heat for the intermediate cooling liquid connecting pipe and the intermediate refrigerant connecting pipe.

[0040] Through the structural design of the three-phase heat exchanger, the heat exchanger can be arranged in a smaller space while having the ability of refrigerant heat exchange, cooling liquid heat exchange and wind power heat exchange.

[0041] Embodiment two

[0042] Referring to the accompanying drawings Figure 6 -Appendix Figure 9 A top-mounted energy storage air-cooled air conditioning system, comprising: a compressor 1, a three-phase heat exchanger I 2, a three-phase heat exchanger II 3, an outer fan 4, an inner fan 5, a capillary tube 6 (or an expansion valve), a water pump 7, an expansion water kettle 8, a drying tank 9 and a wind box 10.

[0043] The three-phase heat exchanger I and the three-phase heat exchanger II both adopt the three-phase heat exchanger structure described in embodiment one.

[0044] The outlet of the compressor 1 is connected to the inlet of the refrigerant chamber of the three-phase heat exchanger I 2, the outlet of the refrigerant chamber of the three-phase heat exchanger I 2 is connected to the inlet of the drying tank 9, the outlet of the drying tank 9 is connected to the inlet of the capillary tube 6, the outlet of the capillary tube 6 is connected to the inlet of the refrigerant chamber of the three-phase heat exchanger II 3, the outlet of the refrigerant chamber of the three-phase heat exchanger II 3 is connected to the inlet of the compressor 1, thereby forming a refrigerant circulation system, i.e., a compressor-based air conditioning refrigeration system, in which the three-phase heat exchanger I 2 functions as a condenser and the three-phase heat exchanger II 3 functions as an evaporator.

[0045] The outlet of the water pump 7 is connected to the inlet of the cooling liquid water chamber of the three-phase heat exchanger I 2, and the outlet of the water pump and the inlet of the cooling liquid water chamber of the three-phase heat exchanger I are also connected to the expansion water tank 8, the outlet of the cooling liquid water chamber of the three-phase heat exchanger I is connected to the inlet of the cooling liquid water chamber of the three-phase heat exchanger II 3 through a pipeline, and the outlet of the cooling liquid water chamber of the three-phase heat exchanger II 3 is connected to the inlet of the water pump, thereby forming a cooling liquid circulation system.

[0046] The air bellow 10 is preferably a rectangular box, and a partition 11 is arranged in the air bellow to form two independent first and second cavities 101 and 102 in the air bellow, and the first and second cavities are both rectangular.

[0047] The inner fan 5 and the three-phase heat exchanger II 3 are arranged in the first cavity 101, wherein the three-phase heat exchanger II 3 is arranged obliquely in the first cavity 101, and the inner fan 5 is arranged at the side of the three-phase heat exchanger II 3; the circulation air inlet 103 and the circulation air outlet 104 are arranged on the bottom surface of the air bellow 10 and communicate with the inside of the first cavity 101, and the circulation air inlet 103 and the circulation air outlet 104 are respectively located at the two sides of the three-phase heat exchanger II 3; in this way, during operation, the air bellow 10 is arranged on the top of the energy storage cabinet, the circulation air inlet and the circulation air outlet are used to communicate with the inside of the energy storage cabinet, and the heat in the energy storage cabinet is circulated through the first cavity of the air bellow and the three-phase heat exchanger II under the action of the inner fan 5, and the three-phase heat exchanger II in the first cavity can absorb the heat in the energy storage cabinet, thereby achieving the cooling of the energy storage cabinet.

[0048] The outer fan 4 and the three-phase heat exchanger I 2 are arranged in the second cavity 102 of the air bellow, wherein the three-phase heat exchanger I 2 is arranged obliquely in the second cavity 102, and the outer fan 4 is arranged at the side of the three-phase heat exchanger I; and the air inlet 105 and the air outlet 106 are arranged on the opposite two side surfaces of the air bellow along the second cavity and communicate with the inside of the second cavity; in this way, during operation, the airflow from the outside is introduced into the second cavity through the air inlet 105 and flows through the three-phase heat exchanger I 2 and is then discharged from the air outlet 106 under the action of the outer fan 4, thereby discharging the heat of the three-phase heat exchanger I 2 from the air bellow 10.

[0049] Further, a first temperature detection sensor is arranged at the circulating air inlet 103 in the first cavity 101 to detect the return air temperature of the three-phase heat exchanger II 3.

[0050] Referring to the drawings Figure 10 The working method of the overhead energy storage air-cooled air conditioning system is as follows:

[0051] First, the return air temperature of the three-phase heat exchanger II 3 in the first cavity 101 is detected in real time to determine whether the return air temperature is higher than a set high temperature threshold, which is preferably 28℃ in this embodiment.

[0052] If the return air temperature of the three-phase heat exchanger II 3 is higher than the set high temperature threshold (28℃), the compressor is started to use the refrigerant circulation system (i.e., the compressor-based air conditioning refrigeration system) to dissipate heat from the energy storage cabinet. During the operation of the refrigerant circulation system, it is determined whether the return air temperature of the three-phase heat exchanger II 3 is higher than a set low temperature threshold (which is preferably 25℃). If the return air temperature of the three-phase heat exchanger II 3 is higher than the set low temperature threshold (25℃), the refrigerant circulation system continues to operate. If the return air temperature of the three-phase heat exchanger II 3 is lower than / equal to the set low temperature threshold (25℃), the operation is stopped.

[0053] If the return air temperature of the three-phase heat exchanger II 3 is lower than / equal to the set high temperature threshold (28℃), it is further determined whether the ambient temperature is higher than a set ambient temperature threshold, which is preferably 12℃ in this embodiment. If the ambient temperature is higher than the set ambient temperature threshold, the compressor is started to use the refrigerant circulation system (i.e., the compressor-based air conditioning refrigeration system) to dissipate heat from the energy storage cabinet. If the ambient temperature is lower than / equal to the set ambient temperature threshold (12℃), the cooling liquid circulation system is used to dissipate heat from the energy storage cabinet. During the operation of the cooling liquid circulation system, it is determined whether the return air temperature of the three-phase heat exchanger II 3 is higher than a set low temperature threshold (25℃). If the return air temperature of the three-phase heat exchanger II 3 is higher than the set low temperature threshold (25℃), the cooling liquid circulation system continues to operate. If the return air temperature of the three-phase heat exchanger II 3 is lower than / equal to the set low temperature threshold (25℃), the operation is stopped.

[0054] In this embodiment, when the refrigerant circulation system (i.e., the compressor-based air conditioning refrigeration system) is used, the compressor, the inner fan and the outer fan are in operation, the power consumption of the compressor is 1.86kW, the power consumption of the inner fan is 200W, and the power consumption of the outer fan is 270W, so the total power consumption is 2.33kW. When the cooling liquid circulation system is used, only the inner fan, the outer fan and the water pump are in operation, the power consumption of the inner fan is 200W, the power consumption of the outer fan is 270W, the power consumption of the water pump is 150W, and the total power consumption is 620W.

[0055] The present application can use natural wind cooling mode (i.e. using cooling liquid circulation system) to cool under the condition of relatively low ambient temperature, thereby reducing the working time of the compressor. Compared with the traditional air conditioning system, the battery cabinet system is charged and discharged twice a day, and the annual power consumption is expected to be reduced from 3650 kWh to 2246.4 kWh, a decrease of 38.5%, greatly improving the efficiency and energy consumption performance of the system.

[0056] For ease of description, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0057] Moreover, relative terms such as "first" and "second" are used herein solely to distinguish one component from another, without necessarily requiring or implying any such actual relationship or order between or among the components.

[0058] The above has been described by way of example, it should be noted that any simple modification, change or other equivalent replacement which does not deviate from the core of the present application and which can be made by those skilled in the art without creative labor falls within the scope of protection of the present application.

Claims

1. A method for heat dissipation in a roof-mounted energy storage air-cooled air conditioner, characterized in that: Comprise: Compressor, three-phase heat exchanger I, three-phase heat exchanger II, outer fan, inner fan, capillary, water pump, expansion water pot, drying tank and air bellow; The outlet of the compressor is connected to the liquid inlet of the refrigerant chamber of the three-phase heat exchanger I, the liquid outlet of the refrigerant chamber of the three-phase heat exchanger I is connected to the inlet of the drying tank, the outlet of the drying tank is connected to the inlet of the capillary, the outlet of the capillary is connected to the liquid inlet of the refrigerant chamber of the three-phase heat exchanger II, and the liquid outlet of the refrigerant chamber of the three-phase heat exchanger II is connected to the inlet of the compressor, forming a refrigerant circulation system; The water outlet of the water pump is connected to the water inlet of the cooling liquid water chamber of the three-phase heat exchanger I, and the water outlet of the water pump and the water inlet of the cooling liquid water chamber of the three-phase heat exchanger I are also connected to the expansion water pot. The water outlet of the cooling liquid water chamber of the three-phase heat exchanger I is connected to the water inlet of the cooling liquid water chamber of the three-phase heat exchanger II through a pipeline, and the water outlet of the cooling liquid water chamber of the three-phase heat exchanger II is connected to the water inlet of the water pump, forming a cooling liquid circulation system; The air bellow has independent first and second cavities inside, the inner fan and the three-phase heat exchanger II are arranged in the first cavity, wherein the three-phase heat exchanger II is arranged obliquely in the first cavity, and the inner fan is arranged at the side of the three-phase heat exchanger II;A circulating air inlet and a circulating air outlet are arranged on the bottom surface of the air bellow and communicate with the inside of the first cavity, and the circulating air inlet and the circulating air outlet are respectively located on the two sides of the three-phase heat exchanger II;The air bellow is arranged on the top of the energy storage cabinet, and the circulating air inlet and the circulating air outlet are used to communicate with the inside of the energy storage cabinet;The outer fan and the three-phase heat exchanger I are arranged in the second cavity of the air bellow, wherein the three-phase heat exchanger I is arranged obliquely in the second cavity, and the outer fan is arranged at the side of the three-phase heat exchanger I;And an air inlet and an air outlet are arranged on the opposite two sides of the second cavity of the air bellow and communicate with the inside of the second cavity; First, the return air temperature of the three-phase heat exchanger II in the first cavity is detected in real time, and it is judged whether the return air temperature is higher than the set high temperature threshold; If the return air temperature of the three-phase heat exchanger II is higher than the set high temperature threshold, the compressor is started, and the refrigerant circulation system is used to dissipate heat for the energy storage cabinet;During the operation of the refrigerant circulation system, it is judged whether the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, if the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, the refrigerant circulation system continues to work, and if the return air temperature of the three-phase heat exchanger II is lower than / equal to the set low temperature threshold, the working is stopped. If the return air temperature of the three-phase heat exchanger II is lower than / equal to the set high temperature threshold, it is further judged whether the external environment temperature is higher than the set environment temperature threshold; if the external environment temperature is higher than the set environment temperature threshold, the compressor is started to dissipate heat for the energy storage cabinet through the refrigerant circulation system; if the external environment temperature is lower than / equal to the set environment temperature threshold, the energy storage cabinet is cooled by using the cooling liquid circulation system; during the working process of the cooling liquid circulation system, it is judged whether the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold; if the return air temperature of the three-phase heat exchanger II is higher than the set low temperature threshold, the cooling liquid circulation system continues to work; if the return air temperature of the three-phase heat exchanger II is lower than / equal to the set low temperature threshold, the working is stopped.

2. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: The three-phase heat exchanger I and the three-phase heat exchanger II are of the same structure, and both adopt a three-phase heat exchanger structure, which comprises a refrigerant chamber, a cooling liquid water chamber and heat dissipation fins, wherein the cooling liquid water chamber comprises a first cooling liquid water chamber body, a second cooling liquid water chamber body and intermediate cooling liquid connecting pipes, the first cooling liquid water chamber body and the second cooling liquid water chamber body are both rectangular pipes and are arranged in parallel and spaced apart, the number of the intermediate cooling liquid connecting pipes is multiple and they are arranged in parallel and spaced apart, the two ends of each intermediate cooling liquid connecting pipe are connected to the first cooling liquid water chamber body and the second cooling liquid water chamber body respectively, and a water inlet is arranged on the first cooling liquid water chamber body and a water outlet is arranged on the second cooling liquid water chamber body; the refrigerant chamber comprises a first refrigerant chamber body, a second refrigerant chamber body and intermediate refrigerant connecting pipes, the first refrigerant chamber body is embedded in the first cooling liquid water chamber body, the second refrigerant chamber body is embedded in the second cooling liquid water chamber body, the number of the intermediate refrigerant connecting pipes is multiple and they are arranged side by side with the intermediate cooling liquid connecting pipes, the two ends of each intermediate refrigerant connecting pipe are connected to the first refrigerant chamber body and the second refrigerant chamber body respectively, and a partition is arranged in the first refrigerant chamber body and the second refrigerant chamber body to form a structure in which the intermediate refrigerant connecting pipes are connected in series, a liquid inlet and a liquid outlet are arranged on the first refrigerant chamber body; the heat dissipation fins are arranged on the intermediate cooling liquid connecting pipes and the intermediate refrigerant connecting pipes to dissipate heat for the intermediate cooling liquid connecting pipes and the intermediate refrigerant connecting pipes.

3. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 2, characterized in that: The intermediate refrigerant connecting pipes pass through the pipe wall of the cooling liquid water chamber body and are sealed by filling solder at the penetration positions.

4. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: A first temperature detection sensor is arranged at the circulating air inlet in the first cavity to detect the return air temperature of the three-phase heat exchanger II.

5. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: The air bellow is a rectangular box, and a partition is arranged in the air bellow to form two independent first and second cavities.

6. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: When the refrigerant circulation system is used, the compressor, the inner fan and the outer fan work; when the cooling liquid circulation system is used, the inner fan, the outer fan and the water pump work.

7. The heat dissipation method of rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: The set high temperature threshold is 28℃.

8. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: The set low temperature threshold is 25℃.

9. The heat dissipation method of the rooftop energy storage air-cooled air conditioner according to claim 1, characterized in that: The set environment temperature threshold is 12℃.

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