Refrigerating system applied to heat dissipation of high-power charging pile

Abstract

The utility model relates to the technical field of charging piles, and discloses a refrigerating system applied to heat dissipation of a high-power charging pile, which comprises a charging module box body, a refrigerating unit is arranged in the charging module box body, and the refrigerating unit dissipates heat through a compressor refrigerating system; the compressor refrigerating system comprises a compressor, a condenser, a cooling fan, a drying filter, a capillary tube, an evaporator, a valve body and a cooling fan, the compressor is installed in the top space of the charging module box body, and the condenser is installed at the top position of the charging module box body. The refrigerating system applied to heat dissipation of the high-power charging pile is outstanding in heat dissipation effect, the compressor refrigeration technology is applied to the charging pile, and heat dissipation of a high-power module can be remarkably achieved; the modular design is adopted, safety and convenience are achieved, non-flammable and non-explosive refrigerants are selected, system design is carried out from the angle of user safety, the on-off valve body design is adopted, modular assembly can be achieved, and outdoor maintenance is also facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, and specifically relates to a refrigeration system applied to the heat dissipation of high-power charging piles. Background Art

[0002] A charging pile refers to a charging device that provides energy supplementation for electric vehicles. Its function is similar to that of a fuel dispenser in a gas station. It can be fixed on the ground or wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential community parking lots or charging stations, and can charge various models of electric vehicles according to different voltage levels.

[0003] In recent years, with the rapid growth in the usage of electric vehicles, the number of its supporting charging piles has also increased. From AC home charging piles to DC fast charging piles, the market penetration rate has been continuously improving. When the charging pile is in the working state, a lot of heat will be generated. In order to enable the charging pile to work normally and ensure that the internal components of the charging pile are at an appropriate working temperature, it is necessary to dissipate heat inside the charging pile.

[0004] Most of the current charging piles on the market adopt forced air cooling for heat dissipation. This is a low-cost solution. However, as the charging power increases, it is difficult for air cooling to meet the requirements, and the noise generated by it will also pollute the environment. An effective heat dissipation solution for high-power charging piles will become a major technical difficulty in the industry. To meet the internal heat dissipation requirements of high-power charging piles, there are currently the following two not very mature solutions in the industry: 1. Water cooling solution: By setting up a water cooling system inside the charging pile, using the water cycle to take away the heat generated by the internal components of the charging pile, and then using an external fan to dissipate heat from the radiator. This solution can improve heat dissipation to a certain extent, but its efficiency is not high (water is used as the heat transfer medium); 2. Air cooling solution: By selecting a centrifugal DC fan to achieve the convection of internal and external air, thereby reducing the temperature inside the charging pile. However, as an outdoor electrical device, the charging pile needs to meet the dustproof level of IP5X, and dustproof cotton is often set at the air inlet, which will greatly reduce the air inlet area and affect the working efficiency of the fan, resulting in certain bottlenecks in heat dissipation.

[0005] It can be seen that a refrigeration system applied to the heat dissipation of high-power charging piles is needed to solve the following deficiencies in the two cooling solutions in the industry mentioned in the above background art: 1. Water cooling solution: This system uses water as the heat transfer medium, its efficiency is very low, and it uses a water pump as the power output, and its noise is also very large. The stability of the whole system is insufficient, and after-sales maintenance is required, increasing the cost; 2. Air cooling solution: The centrifugal fan has relatively large noise, and it needs to be matched with a relatively large air inlet to play its role. When the outside air temperature is relatively high, the heat dissipation effect it can achieve is not very ideal. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a refrigeration system applied to the heat dissipation of high-power charging piles, so as to solve the deficiencies existing in the two cooling schemes in the industry in the above-mentioned background technology: 1. Water cooling scheme: This system uses water as the heat transfer medium, with very low efficiency, and uses a water pump as the power output, resulting in a very high noise. The stability of the whole system is insufficient, and after-sales maintenance is required, increasing the cost; 2. Air cooling scheme: The centrifugal fan has a relatively high noise, and it needs to be matched with a relatively large air inlet to play its role. When the outside air temperature is relatively high, the heat dissipation effect it can achieve is not very ideal.

[0007] To solve the above technical problems, the present utility model provides the following technical solution: A refrigeration system applied to the heat dissipation of high-power charging piles, including a charging module box body, inside which a refrigeration unit is arranged, and the refrigeration unit dissipates heat through a compression refrigeration system;

[0008] The compression refrigeration system includes a compressor, a condenser, a heat dissipation fan, a drying filter, a capillary tube, an evaporator, a valve body and a cold air supply fan. The compressor is installed in the top space of the charging module box body, the condenser is installed at the top position of the charging module box body, and condenser copper tubes are arranged on the outside of the condenser. A temperature and humidity probe is arranged on the outside of the condenser copper tubes;

[0009] A charging module is installed inside the charging module box body, and an air cooling channel is arranged between the charging module and the charging module box body. A heat preservation box body is arranged on the outside of the air cooling channel.

[0010] Preferably, heat dissipation holes are opened on the left and right sides of the top of the charging module box body, and the two groups of heat dissipation holes are the air inlets of the condenser. A charging module bracket is arranged on the outside of the charging module, and a charging module air inlet is arranged on one side of the charging module bracket. A charging module fan is installed on one side of the charging module air inlet.

[0011] Preferably, the refrigeration unit includes a refrigeration unit box body, and the refrigeration unit box body is installed on the outside of the compression refrigeration system.

[0012] Preferably, the capillary tube is located on one side of the compressor, the drying filter is located at one end of the capillary tube, the heat dissipation fan is installed on one side of the drying filter, and the condenser is located on one side of the heat dissipation fan.

[0013] Preferably, the valve body is installed above the cold air supply fan, and the valve body is designed as a double valve body.

[0014] Preferably, a heat preservation box cover is arranged on the outside of the heat preservation box body, and a heat preservation layer and a waterproof and breathable film are arranged inside the heat preservation box body. The heat preservation layer is wrapped heat preservation cotton or a foaming layer.

[0015] Preferably, the compression refrigeration system further includes a refrigerant and a copper pipe line, which is the medium of the refrigerant refrigeration system.

[0016] Preferably, a plurality of temperature probes are provided on the outer and inner sides of the charging module box body, and the start and stop of the compressor are realized through logical judgment.

[0017] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0018] First, the heat dissipation effect of the present utility model is prominent. By applying the compression refrigeration technology to the charging pile, the heat dissipation of high-power modules can be significantly realized.

[0019] Second, the present utility model has a modular design, which is safe and convenient. A refrigerant that is not flammable or explosive is selected, and the system is designed from the perspective of user safety. With the on-off valve body design, it can be modularly assembled and is also convenient for outdoor maintenance.

[0020] Third, the present utility model has intelligent control, energy saving and high efficiency. By setting multi-point temperature control inside and outside the charging pile, the temperature and humidity inside the pile are judged, so as to control the start and stop and output power of the compressor. The temperature probe at the condenser judges the heat dissipation state of the refrigeration system, so as to better protect the refrigeration system.

[0021] Fourth, the condensation fan of the present utility model dissipates heat from the condenser by suction, and at the same time, it can also play a role in dissipating heat for the compressor arranged behind the condensation fan.

[0022] Fifth, the heat dissipation of the charging module of the present utility model realizes an internal cycle, thus completely avoiding the dust-proof problem caused by opening ventilation holes, improving the service life of the charging module and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 is a schematic structural diagram of the condenser air inlet and the charging module air inlet of the present utility model;

[0025] Figure 3 is a wind direction flow diagram of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the compression refrigeration system of the present utility model;

[0027] Figure 5 is a working flow chart of the compression refrigeration system of the present utility model.

[0028] Wherein: 1. Charging module box; 101. Charging module; 102. Charging module air inlet; 103. Charging module bracket; 104. Charging module fan; 2. Refrigeration unit; 201. Refrigeration unit box; 3. Compressor refrigeration system; 301. Compressor; 302. Condenser; 3021. Condenser air inlet; 3022. Temperature and humidity probe; 303. Cooling fan; 304. Drier filter; 305. Capillary tube; 306. Evaporator; 307. Valve body; 308. Cold air supply fan; 4. Insulation box; 401. Insulation box cover; 402. Waterproof and breathable film. Detailed implementation manners

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] First embodiment

[0031] Please refer to Figure 1 、 2 Figures 3, 4 and 5. A refrigeration system for the heat dissipation of a high-power charging pile. By arranging a refrigeration module inside the high-power charging pile and realizing the heat dissipation of the internal charging module through the principle of compressor refrigeration, the compressor refrigeration system includes a compressor, a condenser, a fan, a drier filter, a capillary tube, an evaporator and a refrigerant, etc. The compressor is the core component of the refrigeration system and is installed in the top space of the charging pile. The condenser is a key component of the refrigeration system and combines with the fan to dissipate heat from the whole system, thereby ensuring the stable operation of the system; it is installed at the top position of the charging pile, and heat dissipation holes need to be opened on the left and right sides of the top of the charging pile; at the same time, temperature probes are arranged on the condenser copper pipe to prevent the system from being damaged due to poor heat dissipation of the condenser (when the monitored temperature is higher than the critical value, the compressor can be controlled to shut down). The drier filter is an important component of the refrigeration system and is used to dry the internal gaseous refrigerant. The capillary tube is a key component of the refrigeration system and is used to throttle and control the flow rate of the refrigerant. The evaporator is arranged below the compressor (inside the air-cooling channel of the charging module), and the outside of the air-cooling channel is wrapped with heat-insulating cotton or foaming layer. When the compressor works, the evaporator will absorb heat and take away the heat generated by the charging module during operation, thereby playing the role of module heat dissipation. The refrigerant is the medium of the refrigeration system, and a non-flammable and non-explosive refrigerant needs to be selected for outdoor charging piles.

[0032] In this embodiment, in order to better achieve the heat dissipation of the charging module, the present technology will set a heat-insulating layer and a waterproof and breathable film in the air-cooling channel, so as to achieve heat dissipation more safely and efficiently. During the use of compression refrigeration, multiple temperature probes will be set outside and inside the charging pile, and the start and stop of the compressor will be realized through logical judgment, so as to prevent the condensation phenomenon caused by the temperature difference.

[0033] In this embodiment, the working principle of the refrigeration system is that the compressor converts the refrigerant into high-temperature and high-pressure gas and transports it to the condenser. The condenser dissipates heat from this part of the gas through a heat dissipation fan to obtain low-temperature and high-pressure gas, which becomes low-temperature and low-pressure liquid through a drying filter and a capillary tube. The evaporator conducts the low temperature into the space of the charging module through a cold air supply fan, and finally the high-temperature and low-pressure gas in the copper tube returns to the compressor.

[0034] In this embodiment, the refrigeration system is arranged above the charging module of the high-power charging pile, which is convenient for the cold air supply fan to transport the cold quantity to the charging module. A waterproof and breathable film is arranged in the air-cooling channel to block the water vapor generated by the high and low temperature difference and prevent the water vapor from affecting the normal operation of the charging module. The charging module, the evaporator and the cold air supply fan are in a closed and heat-insulating space to form an internal air circulation, and the heat will be discharged outside the pile body through the refrigeration unit of the evaporator. Multiple temperature and humidity sensors are arranged in the space of the refrigeration unit and the charging module. The temperature value is used to judge the start and stop conditions of the compressor, and the humidity value is used to adjust the refrigeration power of the compressor. The double-valve body design facilitates the disassembly of the refrigeration unit and the evaporator, and is convenient for assembly and maintenance. After the refrigeration unit is assembled in advance, an appropriate amount of refrigerant is added through the valve body, and the evaporator pipeline can be connected to the system later. After evacuating through the valve body, it is connected to the refrigeration system.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits. The scope is defined by the appended claims and their equivalents.

Claims

1. A refrigeration system applied to the heat dissipation of high-power charging piles, comprising a charging module box body (1), characterized in that: Inside the charging module box body (1), a refrigeration unit (2) is provided, and the refrigeration unit (2) dissipates heat through a compressor refrigeration system (3); The compressor refrigeration system (3) includes a compressor (301), a condenser (302), a cooling fan (303), a dryer filter (304), a capillary tube (305), an evaporator (306), a valve body (307) and a cold air supply fan (308). The compressor (301) is installed in the top space of the charging module box body (1). The condenser (302) is installed at the top position of the charging module box body (1), and condenser copper tubes are arranged on the outside of the condenser (302). A temperature and humidity probe (3022) is arranged on the outside of the condenser copper tubes; Inside the charging module box body (1), a charging module (101) is installed, and an air-cooling channel is arranged between the charging module (101) and the charging module box body (1). A heat preservation box body (4) is arranged on the outside of the air-cooling channel.

2. The refrigeration system applied to the heat dissipation of high-power charging piles according to claim 1, wherein: Heat dissipation holes are opened on the left and right sides of the top of the charging module box body (1), and the two groups of heat dissipation holes are condenser air inlets (3021). A charging module bracket (103) is arranged on the outside of the charging module (101), and a charging module air inlet (102) is arranged on one side of the charging module bracket (103). A charging module fan (104) is installed on one side of the charging module air inlet (102).

3. The refrigeration system applied to the heat dissipation of high-power charging piles according to claim 1 is characterized in that: The refrigeration unit (2) includes a refrigeration unit box body (201), and the refrigeration unit box body (201) is installed on the outside of the compressor refrigeration system (3).

4. The refrigeration system for high-power charging pile heat dissipation according to claim 1, wherein: The capillary tube (305) is located on one side of the compressor (301), the dryer filter (304) is located at one end of the capillary tube (305), the cooling fan (303) is installed on one side of the dryer filter (304), and the condenser (302) is located on one side of the cooling fan (303).

5. A refrigeration system applied to the heat dissipation of high-power charging piles according to claim 1, characterized in that: The valve body (307) is installed above the cold air supply fan (308), and the valve body (307) is designed as a double valve body.

6. The refrigeration system applied to the heat dissipation of high-power charging piles according to claim 1, wherein: A heat preservation box cover (401) is arranged on the outside of the heat preservation box body (4), and a heat preservation layer and a waterproof and breathable membrane (402) are arranged inside the heat preservation box body (4). The heat preservation layer is wrapped heat preservation cotton or a foaming layer.

7. The refrigeration system applied to the heat dissipation of high-power charging piles according to claim 1, wherein: The compressor refrigeration system (3) further includes refrigerant and copper tube pipelines, which are the media of the refrigerant refrigeration system.

8. A refrigeration system applied to the heat dissipation of high-power charging piles according to claim 1, characterized in that: A plurality of temperature probes are arranged on the outside and inside of the charging module box body (1), and the start and stop of the compressor are realized through logical judgment.

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