Direct cooling system with fire extinguishing function and new energy charging pile

Abstract

The utility model discloses a direct-cooling system with a fire extinguishing function and a new energy charging pile, and relates to the technical field of charging piles, in particular to a direct-cooling system with a fire extinguishing function and a new energy charging pile, the direct-cooling system comprises an independently arranged direct-cooling host and a plurality of groups of direct-cooling terminals arranged in the new energy charging pile, and the plurality of groups of direct-cooling terminals are connected in parallel and then are connected in series with the direct-cooling host; the direct cooling main machine comprises a compressor and a condenser which are sequentially connected in series. The direct cooling terminal comprises an expansion valve and a fire trace tube which are sequentially connected in series; according to the direct cooling system with the fire extinguishing function and the new energy charging pile, heat is taken away through the refrigerant doing work circularly in the system, the weight of the charging gun can be effectively controlled, the heat dissipation performance of the charging pile is guaranteed, meanwhile, equipment noise is low, construction is convenient, the influence on the surrounding environment is small, meanwhile, the refrigerant with the fire extinguishing function is adopted, and the service life of the charging pile is prolonged. And the fire trace tube is adopted as the pipeline, so that a refrigerant can be actively released to be used as a fire extinguishing agent when a fire disaster occurs, the on-site fire behavior is controlled in time, and the loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy charging piles, and more specifically, to a direct cooling system with a fire extinguishing function. In addition, the utility model also relates to a new energy charging pile comprising the direct cooling system with a fire extinguishing function. Background Art

[0002] When a conventional DC charging gun is in operation, its current is usually limited to less than 250A to ensure the stability and safety of the charging process. However, with the development of super-fast charging technology, the current that the charging gun can withstand has reached about 500A, which greatly improves the charging efficiency, but also brings a significant challenge - a significant increase in thermal effects.

[0003] In the prior art, the heat dissipation of the charging pile is mainly carried out by air cooling and liquid cooling;

[0004] The air-cooled type uses air heat exchange, which is related to wind speed and heat exchange area. In the face of high heat generation caused by high-current fast charging, it is necessary to increase the cable cross-sectional diameter and expand the fan speed, which will increase the weight of the cable, making it inconvenient for operators to use and providing a poor user experience. The increase in fan speed will increase noise, affecting surrounding residents and hindering the construction of charging stations.

[0005] Liquid cooling can effectively avoid the above problems. It removes the heat of the cable through cooling oil, thereby reducing the cable cross-section and reducing the fan speed or eliminating the fan. However, liquid cooling requires the targeted laying of liquid cooling pipes and the establishment of a dedicated cooling oil station, which occupies a large area and is difficult to construct. Moreover, when facing a thermal runaway fire during charging, the internal cooling oil is prone to leakage and the fire cannot be extinguished on site in time.

[0006] In summary, how to provide a direct cooling system and a new energy charging pile that can help reduce the difficulty of construction, will not reduce the equipment usage experience, and have a fire extinguishing function is a problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0007] In view of this, the purpose of the utility model is to provide a direct cooling system with a fire extinguishing function. The heat is taken away by the refrigerant circulating in the system, which can effectively control the weight of the charging gun and ensure the heat dissipation performance of the charging pile. At the same time, the equipment has low noise, is easy to construct, and has little impact on the surrounding environment. At the same time, the refrigerant uses a refrigerant with a fire extinguishing function, and the pipeline uses a fire detection tube. When a fire occurs, the refrigerant can be actively released and used as a fire extinguishing agent to control the fire on the scene in time and reduce losses.

[0008] Another object of the present utility model is to provide a new energy charging pile including the above-mentioned direct cooling system with a fire extinguishing function, which can achieve the same purpose.

[0009] To achieve the above object, the present utility model provides the following technical solutions:

[0010] A direct cooling system with a fire extinguishing function and a new energy charging pile, including an independently arranged direct cooling host and several groups of direct cooling terminals arranged in the new energy charging pile. The several groups of direct cooling terminals are connected in parallel and then connected in series with the direct cooling host;

[0011] The direct cooling host includes a compressor and a condenser connected in series in sequence;

[0012] The direct cooling terminal includes an expansion valve and a fire detection tube connected in series in sequence;

[0013] The circulating pipeline of the direct cooling host and the direct cooling terminal is filled with a refrigerant with a fire extinguishing function.

[0014] Preferably, the direct cooling terminal further includes:

[0015] A plate heat exchanger, arranged inside the pile body module of the charging pile, for dissipating heat from the electrical equipment in the pile body module;

[0016] A first fire detection tube, arranged in the pile body module, connected in series with the plate heat exchanger, and wound around the electrical component layout area in the pile body module, for dissipating heat and preventing fire in the electrical component layout area.

[0017] Preferably, the inner wall of the working surface of the plate heat exchanger is provided with a serrated evaporation surface, and the outer wall of the non-working surface of the plate heat exchanger is wrapped with a heat insulation layer.

[0018] Preferably, the direct cooling terminal further includes:

[0019] A refrigeration cavity, arranged inside the gun head main body of the charging gun module, for dissipating heat at the charging interface;

[0020] A second fire detection tube, arranged inside the gun line main body of the charging gun module, connected in series with the refrigeration cavity, for dissipating heat of the gun line main body.

[0021] Preferably, several groups of refrigeration cavities are arranged inside the gun head main body, and an exposed fire detection tube is connected in communication between adjacent two groups of refrigeration cavities.

[0022] Preferably, the second fire detection tube is located at the center line position of the gun line main body, and a wire layer and an insulating layer are sequentially wound and wrapped outside the second fire detection tube.

[0023] Preferably, after the first fire detection tube and the second fire detection tube are connected in series or in parallel, they are connected in series with the first expansion valve;

[0024] Or, the first fire detection tube is connected in series with the first expansion valve, the second fire detection tube is connected in series with a second expansion valve, and the first expansion valve and the second expansion valve are connected in parallel.

[0025] Preferably, a first temperature sensor is arranged in the pile body module, and a second temperature sensor is arranged in the charging gun module;

[0026] The first expansion valve is an electronic expansion valve, and both the first temperature sensor and the second temperature sensor are electrically connected to the control unit of the first expansion valve and / or the compressor;

[0027] Or, the first expansion valve and the second expansion valve are electronic expansion valves, the first temperature sensor is electrically connected to the control unit of the first expansion valve, and the second temperature sensor is electrically connected to the control unit of the second expansion valve.

[0028] A new energy charging pile includes the direct cooling system with a fire extinguishing function described in any one of the above.

[0029] Compared with the prior art, the direct cooling system with a fire extinguishing function provided by the present utility model has at least the following beneficial effects:

[0030] 1. By combining a compressor and an expansion valve to drive the internal refrigerant to circulate, heat transfer is achieved, and the charging pile can be quickly cooled. Affected by the principle of the direct cooling system, there is no need to increase the cross-sectional diameter of the cables inside the charging pile, that is, the weight of the charging gun is effectively reduced, and the user experience is improved;

[0031] 2. Affected by the principle of the direct cooling system, the equipment occupies a small volume, has low noise, has little impact on the surrounding environment and the lives of surrounding residents, and is convenient for construction;

[0032] 3. By combining a refrigerant with a fire extinguishing effect and a fire detection tube, when a fire breaks out at the site, the fire detection tube can quickly release the internal refrigerant, which is used as a fire extinguishing agent to accurately extinguish the fire point, effectively reducing the losses caused by the fire.

[0033] The new energy charging pile provided by the present utility model includes the direct cooling system with a fire extinguishing function described above and has the same beneficial effects. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0035] Figure 1 Schematic diagram of the principle of the first embodiment of the direct cooling system with fire extinguishing function provided by the present utility model;

[0036] Figure 2 Schematic diagram of the principle of the second embodiment of the direct cooling system with fire extinguishing function provided by the present utility model;

[0037] Figure 3 Schematic diagram of the principle of the third embodiment of the direct cooling system with fire extinguishing function provided by the present utility model;

[0038] Figure 4 Schematic diagram of the principle of the direct cooling terminal inside the specific pile body module provided by the present utility model;

[0039] Figure 5 Provided by the present utility model Figure 4 Enlarged schematic diagram of location A;

[0040] Figure 6 Schematic diagram of the structure of the direct cooling terminal inside the specific charging gun module provided by the present utility model;

[0041] Figure 7 Schematic diagram of the structure of another embodiment of the direct cooling terminal inside the specific charging gun module provided by the present utility model;

[0042] Figure 8 Schematic diagram of the cross-section of the specific gun line main body provided by the present utility model.

[0043] Figures 1-8 Wherein:

[0044] 1. Direct cooling main unit; 101. Compressor; 102. Condenser;

[0045] 2. Direct cooling terminal; 201. First expansion valve; 202. First fire detection tube; 203. Second fire detection tube; 204. Second expansion valve; 205. First temperature sensor; 206. Second temperature sensor;

[0046] 3. Charging gun module; 301. Refrigeration cavity; 302. Exposed fire detection tube; 303. Conductor layer; 304. Insulation layer;

[0047] 4. Pile body module; 401. Heat insulation layer; 402. Plate type radiator. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0049] The core of the present invention is to provide a direct cooling system with a fire extinguishing function. Through the refrigerant that circulates and does work within the system, heat is carried away, which can effectively control the weight of the charging gun, ensure the heat dissipation performance of the charging pile, and at the same time, the equipment has less noise, is convenient for construction, and has less impact on the surrounding environment. At the same time, the refrigerant used is a refrigerant with a fire extinguishing function, and the pipeline uses a fire detection tube, which can actively release the refrigerant when a fire occurs and use it as a fire extinguishing agent to timely control the on-site fire situation and reduce losses.

[0050] Another core of the present invention is to provide a new energy charging pile including the above-mentioned direct cooling system with a fire extinguishing function, which has the same technical solution and can achieve the same purpose.

[0051] Please refer to Figures 1-8 , a direct cooling system with a fire extinguishing function, including an independently arranged direct cooling host 1 and several groups of direct cooling terminals 2 arranged in a new energy charging pile. After several groups of direct cooling terminals 2 are connected in parallel, they are connected in series with the direct cooling host 1;

[0052] The direct cooling host 1 includes a compressor 101 and a condenser 102 connected in series in sequence;

[0053] The direct cooling terminal 2 includes an expansion valve and a fire detection tube connected in series in sequence;

[0054] The circulating pipelines of the direct cooling host 1 and the direct cooling terminal 2 are filled with a refrigerant with a fire extinguishing function;

[0055] Adopt the method of using the compressor 101 to drive the refrigerant in the system to circulate and do work to carry heat, carry the heat at the charging pile end to the direct cooling host 1 end for centralized heat dissipation. With the effective heat transfer ability of the refrigerant, it helps to reduce the wire diameter of the charging gun, reduce the weight of the charging gun, and improve the user experience;

[0056] Arrange the direct cooling host 1 independently, which does not affect the original volume of the charging pile, thereby reducing the space occupation of the parking space area, and making the noise-generating compressor 101 away from the user terminal, improving the user experience of users and surrounding residents;

[0057] Inside the direct cooling terminal 2, an expansion valve and a fire detection tube are integrated. By adjusting the flow rate of the expansion valve, the refrigeration effect can be changed to meet the heat dissipation requirements of different devices at different powers. Moreover, it can effectively reduce energy consumption on the premise of ensuring the normal operation of the device. In addition, a refrigerant with fire extinguishing function is filled in the system, such as R227EA and R125 refrigerants. When a fire occurs on site, when the local temperature at the site exceeds the set temperature and time of the fire detection tube, the fire detection tube at that position can quickly rupture and release the refrigerant in a directional manner to extinguish the fire, thereby extinguishing the fire at the initial stage of the fire, suppressing the fire in the budding stage, and reducing losses.

[0058] In some embodiments, as Figure 4 shown, the direct cooling terminal 2 further includes:

[0059] A plate heat exchanger 402, which is arranged inside the pile body module 4 of the charging pile and is used for dissipating heat from the electrical equipment in the pile body module 4;

[0060] A first fire detection tube 202, which is arranged in the pile body module 4, is connected in series with the plate heat exchanger 402, and is arranged around the electrical component layout area in the pile body module 4, and is used for heat dissipation and fire prevention in the electrical component layout area;

[0061] The plate heat exchanger 402 is used to dissipate heat from the power module. It has a large heat exchange area, can quickly take away the heat generated by the power module, has high heat exchange efficiency, and by adjusting the refrigerant flow rate in the plate heat exchanger 402, the heat dissipation rate can be changed to meet the heat dissipation requirements of the power module in different working states, thereby achieving the effect of energy saving;

[0062] At the same time, the first fire detection tube 202 passes through the electrical component layout area. In actual use, it is mostly the resistors or capacitors in the electrical component layout area that are prone to deflagration. Therefore, when a high-temperature deflagration occurs at that position, the first fire detection tube 202 at the corresponding position can quickly release the refrigerant to extinguish the fire and avoid continuous high-temperature combustion inside the pile body module 4.

[0063] In some embodiments, as Figure 5 shown, the inner wall of the working surface of the plate heat exchanger 402 is provided with a serrated evaporation surface, and the outer wall of the non-working surface of the plate heat exchanger 402 is wrapped with a heat insulation layer 401;

[0064] By setting the serrated evaporation surface, a larger heat exchange surface with the refrigerant can be obtained inside the plate heat exchanger 402, thereby improving the heat transfer efficiency of the refrigerant, that is, improving the heat dissipation efficiency inside the pile body module 4;

[0065] At the same time, the outer wall of the non-working surface of the plate heat exchanger 402 is wrapped with a heat insulation layer 401 to reduce the heat transfer of the non-working surface and avoid the appearance of condensed water on the surface of the plate heat exchanger 402.

[0066] In some embodiments, such as Figure 6 and Figure 8 shown, the direct cooling terminal 2 further includes:

[0067] A refrigeration chamber 301, arranged in the gun head body of the charging gun module 3, for heat dissipation at the charging interface;

[0068] A second fire detection tube 203, arranged in the gun line body of the charging gun module 3, connected in series with the refrigeration chamber 301, for heat dissipation of the gun line body;

[0069] By arranging the refrigeration chamber 301 in the gun head body, the liquid refrigerant vaporizes and expands in the refrigeration chamber 301 to absorb heat, quickly cooling the contact points of the gun head body, thereby avoiding high temperature at the gun head;

[0070] At the same time, the second fire detection tube 203 is integrated in the gun line body, and with the transmission of the refrigerant, the temperature reduction and fire prevention of the gun line body are achieved.

[0071] In some embodiments, such as Figure 7 shown, several groups of refrigeration chambers 301 are arranged in the gun head body, and an exposed fire detection tube 302 is connected in communication between adjacent two groups of refrigeration chambers 301;

[0072] By adding the exposed fire detection tube 302 on the gun head body, when a fire occurs when the gun head body is combined with the vehicle charging interface, the exposed fire detection tube 302 in the gun head body can quickly rupture and release the refrigerant in a directional manner for fire extinguishing, avoiding an increase in vehicle losses.

[0073] In some embodiments, such as Figure 8 , the second fire detection tube 203 is located at the center line position of the gun line body, and a wire layer 303 and an insulating layer 304 are successively wound and wrapped outside the second fire detection tube 203;

[0074] By arranging the second fire detection tube 203 at the center of the gun line body, it can effectively avoid being worn by the outside, and can evenly dissipate heat from the surrounding wires;

[0075] And when a fire occurs in the gun line body, it can spray the refrigerant from the inside, effectively improving the fire extinguishing efficiency.

[0076] In some embodiments, such as Figures 1-3 shown, after the first fire detection tube 202 and the second fire detection tube 203 are connected in series or in parallel, they are connected in series with the first expansion valve 201;

[0077] Or the first fire detection tube 202 is connected in series with the first expansion valve 201, the second fire detection tube 203 is connected in series with a second expansion valve 204, and the first expansion valve 201 and the second expansion valve 204 are connected in parallel;

[0078] Such as Figure 1As shown, the first fire detection tube 202, the second fire detection tube 203 and the first expansion valve 201 are connected in series, that is, the direct cooling terminals 2 in the pile body module 4 and the charging gun module 3 are connected in series, and only one set of expansion valves is used for control, with a simple structure and easy maintenance;

[0079] As Figure 2 shown, after the first fire detection tube 202 and the second fire detection tube 203 are connected in parallel, they are connected in series with the first expansion valve 201, that is, the direct cooling terminals 2 in the pile body module 4 and the charging gun module 3 are connected in parallel, ensuring that the refrigerants entering both have the same initial temperature. By setting the length and layout of the fire detection tubes differently, the heat dissipation efficiency of both can be regulated;

[0080] As Figure 3 shown, two groups of fire detection tubes are separately connected to independent expansion valves to achieve separate control, which helps to separately regulate the heat dissipation modes of the pile body module 4 and the charging gun module 3.

[0081] In some embodiments, a first temperature sensor 205 is provided in the pile body module 4, and a second temperature sensor 206 is provided in the charging gun module 3;

[0082] The first expansion valve 201 is an electronic expansion valve, and both the first temperature sensor 205 and the second temperature sensor 206 are electrically connected to the control unit of the first expansion valve 201 and / or the compressor 101;

[0083] Or, the first expansion valve 201 and the second expansion valve 204 are electronic expansion valves. The first temperature sensor 205 is electrically connected to the control unit of the first expansion valve 201, and the second temperature sensor 206 is electrically connected to the control unit of the second expansion valve 204.

[0084] By setting temperature sensors at corresponding positions in the pile body module 4 and the charging gun module 3, real-time temperature detection is carried out on key positions that are prone to heat generation. When the temperature rises, the opening degree of the corresponding expansion valve can be increased to increase the refrigerant flow rate, improve the heat exchange rate, and then improve the heat dissipation effect, reduce the temperature at this point, and ensure the normal operation of the components.

[0085] In addition to the direct cooling system with fire extinguishing function disclosed in each of the above embodiments, the present invention also provides a new energy charging pile including the above direct cooling system with fire extinguishing function. For the structures of other parts of this new energy charging pile, please refer to the prior art and will not be elaborated herein.

[0086] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are all about the differences from other embodiments. For the same and similar parts between each embodiment, reference can be made to each other.

[0087] The above has introduced in detail the direct cooling system with a fire extinguishing function and the new energy charging pile provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A direct cooling system with a fire extinguishing function, characterized in that, It includes a direct cooling main unit (1) arranged independently and several groups of direct cooling terminals (2) arranged in a new energy charging pile. After several groups of the direct cooling terminals (2) are connected in parallel, they are connected in series with the direct cooling main unit (1); The direct cooling main unit (1) includes a compressor (101) and a condenser (102) connected in series in sequence; The direct cooling terminal (2) includes an expansion valve and a fire detection tube connected in series in sequence; A refrigerant with a fire extinguishing function is filled in the circulation pipelines of the direct cooling main unit (1) and the direct cooling terminal (2).

2. The direct cooling system with a fire extinguishing function according to claim 1, wherein, The direct cooling terminal (2) further includes: A plate heat radiator (402) arranged inside the pile body module (4) of the charging pile for dissipating heat of the electrical equipment in the pile body module (4); A first fire detection tube (202) arranged in the pile body module (4), connected in series with the plate heat radiator (402), and wound around the electrical component layout area in the pile body module (4) for dissipating heat and preventing fire of the electrical component layout area.

3. The direct cooling system with a fire extinguishing function according to claim 2, characterized in that, The inner wall of the working surface of the plate heat radiator (402) is provided with a serrated evaporation surface, and the outer wall of the non-working surface of the plate heat radiator (402) is wrapped with a heat insulation layer (401).

4. The direct cooling system with a fire extinguishing function according to claim 2, wherein The direct cooling terminal (2) further includes: A refrigeration cavity (301) arranged inside the gun head body of the charging gun module (3) for dissipating heat at the charging interface; A second fire detection tube (203) arranged in the gun line body of the charging gun module (3), connected in series with the refrigeration cavity (301), for dissipating heat of the gun line body.

5. The direct cooling system with a fire extinguishing function according to claim 4, wherein, Several groups of refrigeration cavities (301) are arranged in the gun head body, and an exposed fire detection tube (302) is connected in communication between adjacent two groups of the refrigeration cavities (301).

6. The direct cooling system with a fire extinguishing function according to claim 4, characterized in that, The second fire detection tube (203) is located at the center line position of the gun line body, and a wire layer (303) and an insulating layer (304) are wound and wrapped around the outside of the second fire detection tube (203) in sequence.

7. The direct cooling system with a fire extinguishing function according to claim 4, characterized in that, After the first fire detection tube (202) and the second fire detection tube (203) are connected in series or in parallel, they are connected in series with a first expansion valve (201); Or the first fire detection tube (202) is connected in series with the first expansion valve (201), the second fire detection tube (203) is connected in series with a second expansion valve (204), and the first expansion valve (201) and the second expansion valve (204) are connected in parallel.

8. The direct cooling system with a fire extinguishing function according to claim 7, characterized in that, A first temperature sensor (205) is arranged in the pile body module (4), and a second temperature sensor (206) is arranged in the charging gun module (3); The first expansion valve (201) is an electronic expansion valve, and both the first temperature sensor (205) and the second temperature sensor (206) are electrically connected to the control unit of the first expansion valve (201) and / or the compressor (101); Or, the first expansion valve (201) and the second expansion valve (204) are electronic expansion valves, the first temperature sensor (205) is electrically connected to the control unit of the first expansion valve (201), and the second temperature sensor (206) is electrically connected to the control unit of the second expansion valve (204).

9. A new energy charging pile, characterized in that, It includes the direct cooling system with a fire extinguishing function according to any one of claims 1-8.

Images