Charging pile heat dissipation system and charging pile

Abstract

The utility model discloses a charging pile heat dissipation system and a charging pile, and relates to the technical field of new energy, in particular to the charging pile heat dissipation system comprising a cooling liquid circulation system which comprises a cooling liquid circulation loop, and a liquid storage tank, a circulation pump and a heat exchanger which are sequentially connected in series in the cooling liquid circulation loop; the refrigerant circulation system comprises a refrigerant circulation loop, and a compressor, a condenser, an expansion valve and an evaporator which are sequentially connected in series in the refrigerant circulation loop; wherein the evaporator is arranged in the liquid storage tank and is used for exchanging heat with cooling liquid in the liquid storage tank; according to the charging pile heat dissipation system and the charging pile, the refrigerant circulation system is additionally arranged, cooling liquid in the liquid storage tank is cooled, it is ensured that the temperature difference of the cooling liquid in and out of the liquid storage tank is large, then it is ensured that the charging pile and a gun line are continuously in an efficient heat dissipation state, and the influence of the external environment temperature and the working duration of the charging pile on the heat dissipation effect is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field, more specifically, relate to a charging pile heat dissipation system, furthermore, the utility model relates to a charging pile including above -mentioned charging pile heat dissipation system. BACKGROUND

[0002] With the development of new energy vehicles, the charging equipment represented by charging piles also develops synchronously, with the continuous improvement of charging power, the heat of charging piles and charging gun lines becomes larger and larger, and the charging piles and charging gun lines need to be cooled, in the prior art, most of the heat dissipation is carried out by air cooling or liquid cooling, the air cooling has large noise and limited heat dissipation effect, and cannot directly cool the gun line, the liquid cooling is carried out by circulating pump driving the cooling liquid to circulate in the cooling pipeline, and a large amount of cooling liquid is stored in the liquid tank to cool, although the heat dissipation effect of the charging pile and the gun line can be improved, when the external temperature is high and the charging pile and the gun line continuously generate heat, the temperature in the liquid tank continuously rises, until the temperature of the inlet and outlet cooling liquid of the liquid tank is close, and the overall heat dissipation effect of the charging pile is reduced.

[0003] In summary, how to solve the problem of the reduction of the heat dissipation effect of the charging pile caused by the close temperature of the inlet and outlet cooling liquid of the liquid tank in the liquid cooling heat dissipation is a problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a charging pile heat dissipation system, increasing the refrigerant circulation system, cooling the cooling liquid in the liquid tank, ensuring that there is a large temperature difference between the inlet and outlet cooling liquid of the liquid tank, and ensuring that the charging pile and the gun line are continuously in the state of high-efficiency heat dissipation, reducing the influence of the external environment temperature and the working time of the charging pile on the heat dissipation effect.

[0005] Another object of the utility model is to provide a charging pile including the above-mentioned charging pile heat dissipation system, having the same technical features and being able to solve the same technical problems.

[0006] In order to achieve the above object, the utility model provides the following technical scheme:

[0007] A charging pile heat dissipation system, comprising:

[0008] A cooling liquid circulation system, comprising a cooling liquid circulation loop and a liquid tank, a circulating pump and a heat exchanger connected in series in the cooling liquid circulation loop;

[0009] A refrigerant circulation system, comprising a refrigerant circulation loop and a compressor, a condenser, an expansion valve and an evaporator connected in series in the refrigerant circulation loop;

[0010] The evaporator is arranged in the liquid storage tank and exchanges heat with the cooling liquid in the liquid storage tank.

[0011] Preferably, the cooling liquid outlet and the cooling liquid inlet of the liquid storage tank are arranged at the low position and the high position of the liquid storage tank respectively, and the refrigerant outlet and the refrigerant inlet of the evaporator are arranged at the high position and the low position of the liquid storage tank respectively.

[0012] Preferably, a first temperature transmitter is arranged at the cooling liquid outlet of the liquid storage tank, and a second temperature transmitter is arranged at the cooling liquid inlet of the liquid storage tank.

[0013] Preferably, a third temperature transmitter is arranged in the liquid storage tank and used for detecting the temperature of the cooling liquid in the liquid storage tank.

[0014] Preferably, a heat insulation layer is arranged outside the liquid storage tank and used for reducing the direct heat exchange amount between the cooling liquid in the liquid storage tank and the external environment.

[0015] Preferably, a plurality of groups of the heat exchangers are connected in parallel and then connected in series in the cooling liquid circulation loop.

[0016] A first regulating valve is connected in series at the cooling liquid inlet of each group of the heat exchangers, and a fourth temperature transmitter is arranged at the cooling liquid outlet of each group of the heat exchangers.

[0017] Preferably, a check valve is connected in series at the cooling liquid outlet of each group of the heat exchangers.

[0018] Preferably, a second regulating valve is arranged in parallel on the parallel connection body of the plurality of groups of the heat exchangers.

[0019] Preferably, a plurality of groups of the heat exchangers and the series connection body of the circulating pumps are connected in parallel and then connected in series in the cooling liquid circulation loop.

[0020] A fourth temperature transmitter is arranged at the cooling liquid outlet of each series connection body.

[0021] The charging pile comprises the charging pile heat dissipation system, and the heat exchanger comprises a cooling liquid pipe arranged in a gun wire of a charging gun.

[0022] Compared with the prior art, the charging pile heat dissipation system has at least the following beneficial effects:

[0023] 1. The refrigerant circulation system is added on the basis of the original cooling liquid circulation system, the refrigerant circulation system is used for work, the liquid storage tank in the cooling liquid circulation system is rapidly cooled, the cooling liquid in the liquid storage tank is in a low temperature, the temperature difference of the cooling liquid in and out of the liquid storage tank is increased, the heat exchange efficiency of the heat exchanger in the charging pile is improved, and the heat dissipation effect of the charging pile is improved.

[0024] 2. Since the storage tank contains a large amount of coolant, the refrigerant circulation system can pre-cool the coolant in the storage tank. When the charging pile is operating at high power, the coolant at a lower temperature can be used directly for cooling, avoiding the refrigerant circulation system from operating at high power at the same time as the charging pile, thus avoiding multiple systems operating at high power at the same time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a first embodiment of the charging pile heat dissipation system provided by this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the charging pile heat dissipation system provided by this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the charging pile heat dissipation system provided by this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the charging pile heat dissipation system provided by this utility model.

[0030] In the picture:

[0031] 1. Liquid receiver; 2. Circulating pump; 3. Evaporator; 4. Expansion valve; 5. Condenser; 6. Compressor; 7. Heat exchanger; 8. First regulating valve; 9. Check valve; 10. First temperature transmitter; 11. Second temperature transmitter; 12. Third temperature transmitter; 13. Second regulating valve; 14. Fourth temperature transmitter; 15. Solenoid directional valve; 16. Bypass pipe. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] The core of the utility model discloses a charging pile heat dissipation system, increase refrigerant circulating system, the cooling liquid in the liquid storage tank is cooled, ensure that the cooling liquid temperature of the liquid storage tank exists greater temperature difference, and then ensure that the charging pile and gun line continuously are in the state of high -efficient heat dissipation, reduce the influence of ambient temperature and charging pile working length on the heat dissipation effect.

[0034] Another core of the utility model discloses a charging pile including the charging pile heat dissipation system of above, has same technical features, can solve the same technical problem.

[0035] Please refer to Figures 1-4 A charging pile heat dissipation system, comprising:

[0036] Cooling liquid circulating system, including cooling liquid circulation loop and the liquid storage tank 1, circulating pump 2 and heat exchanger 7 that are sequentially connected in cooling liquid circulating loop inside;

[0037] Refrigerant circulating system, including refrigerant circulation loop and the compressor 6, condenser 5, expansion valve 4 and evaporator 3 that are sequentially connected in refrigerant circulating loop inside;

[0038] Among them, evaporator 3 is built into the liquid storage tank 1, is used to exchange heat with the cooling liquid in the liquid storage tank 1.

[0039] As Figure 1 Indicated, the heat exchanger 7 in cooling liquid circulating system is arranged in charging pile or gun line, and circulating pump 2 works, can drive cooling liquid to circulate in the whole cooling liquid circulating loop, that is, the cooling liquid in the liquid storage tank 1 is made into heat exchanger 7 by circulating pump 2, and after being heated with charging pile or gun line, backflow to the liquid storage tank 1, since cooling liquid participates in heat exchange in heat exchanger 7, so the temperature of backflow cooling liquid is higher than the temperature of cooling liquid that initially flows out of the liquid storage tank 1, along with the continuous work of cooling liquid circulating system, the overall temperature of cooling liquid in the liquid storage tank 1 gradually rises, that is, the temperature of cooling liquid that initially flows out of the liquid storage tank 1 constantly rises, and gradually approaches the temperature of backflow cooling liquid, at this time, the heat exchange efficiency of heat exchanger 7 declines, and the heat dissipation capacity of charging pile declines.

[0040] And in refrigerant circulating system, compressor 6 works, makes refrigerant circulate and flow in refrigerant circulating loop, carries heat from evaporator 3 to condenser 5, and in condenser 5, by means of heat dissipation fan, carries out rapid heat dissipation, and evaporator 3 constantly absorbs the temperature of cooling liquid in the liquid storage tank 1, and then the overall temperature of cooling liquid in the liquid storage tank 1 constantly declines, until the temperature difference between the temperature of cooling liquid that initially flows out and the temperature of backflow cooling liquid is relatively large, the heat exchange efficiency of heat exchanger 7 is improved, and then the heat exchange efficiency of charging pile is improved.

[0041] Meanwhile, during use, the refrigerant circulation system can operate at high power in advance to lower the temperature of the coolant in the storage tank 1 to the set temperature, so that when the charging pile reaches the peak heat generation, it can quickly dissipate heat with the help of the coolant circulation system.

[0042] In some embodiments, the coolant outlet and inlet of the liquid storage tank 1 are located at the low and high positions of the liquid storage tank 1, respectively, and the refrigerant outlet and inlet of the evaporator 3 are located at the high and low positions of the liquid storage tank 1, respectively.

[0043] like Figure 1 As shown, the coolant outlet and inlet of the storage tank 1 are located at the low and high positions of the storage tank 1, respectively. That is, the high-temperature return coolant flows in from the top of the storage tank 1, cools down in the storage tank 1, and then sinks continuously before flowing out from the bottom. This ensures that the temperature of the coolant flowing out of the storage tank 1 is lower than the temperature of the return coolant.

[0044] Meanwhile, the refrigerant inlet and outlet are respectively set at the low and high positions of the liquid storage tank 1, so that the refrigerant enters the liquid storage tank 1 from the bottom, contacts and exchanges heat with the low temperature coolant at the bottom of the liquid storage tank 1, and then rises continuously to exchange heat with the high temperature coolant in the upper layer of the liquid storage tank 1, and then is discharged from the high position. This helps to improve the heat exchange efficiency of the evaporator 3 and conforms to the law that the high temperature liquid rises and the low temperature liquid sinks in the liquid storage tank 1, so that the temperature of the lower layer of coolant in the liquid storage tank 1 is always lower than that of the upper layer of coolant.

[0045] In some embodiments, a first temperature transmitter 10 is provided at the coolant outlet of the liquid storage tank 1, and a second temperature transmitter 11 is provided at the coolant inlet of the liquid storage tank 1.

[0046] like Figure 2 As shown, the first temperature transmitter 10 can measure the temperature of the coolant flowing out of the storage tank 1 once, and the second temperature transmitter 11 can measure the temperature of the returning coolant a second time. When there is a large difference between the first and second temperature measurements, the heat exchanger 7 is in a high-efficiency heat exchange state. When the difference between the first and second temperature measurements is small, it indicates that the heat exchanger 7 has a low heat exchange efficiency. If the second temperature measurement value is large, it indicates that the coolant temperature in the storage tank 1 is high, and the refrigerant circulation system needs to work to cool the coolant in the storage tank 1. If the second temperature measurement value is small, it indicates that the charging pile is generating less heat, and the circulation speed of the coolant circulation system can be reduced.

[0047] In other words, by measuring the temperature on one side and the temperature on the other, the coolant circulation system and the refrigerant circulation system can be adjusted, thereby reducing overall energy consumption and ensuring heat dissipation.

[0048] In some embodiments, a third temperature transmitter 12 is provided inside the liquid storage tank 1 for detecting the temperature of the coolant inside the liquid storage tank 1.

[0049] The third temperature transmitter 12 can directly detect the temperature of the coolant in the storage tank 1. When the temperature exceeds the set value, it can start or increase the power of the refrigerant circulation system to reduce the temperature of the coolant in the storage tank 1, so as to ensure that the temperature of the coolant in the storage tank 1 is always below the set temperature, so that the heat exchanger 7 can obtain the best heat exchange efficiency at any time, and thus the charging pile can obtain the best heat dissipation effect at any time.

[0050] In some embodiments, a heat insulation layer is provided on the outside of the liquid storage tank 1 to reduce the amount of direct heat exchange between the coolant in the liquid storage tank 1 and the external environment.

[0051] By setting a heat insulation layer on the outside of the liquid storage tank 1, external heat is prevented from entering the liquid storage tank 1 and causing the temperature of the coolant in the liquid storage tank 1 to rise. That is, after the refrigerant circulation system is working, the coolant in the liquid storage tank 1 can be kept at a low temperature for a long time so that the coolant circulation system can be activated at any time.

[0052] In some embodiments, several groups of heat exchangers 7 are connected in parallel and then connected in series in the coolant circulation loop;

[0053] Each heat exchanger 7 has a first regulating valve 8 connected in series at the coolant inlet and a fourth temperature transmitter 14 installed at the coolant outlet.

[0054] like Figure 2 As shown, when multiple charging piles share a single refrigerant circulation system, the multiple heat exchangers 7 are connected in parallel, and the multiple heat exchangers 7 share a single circulation pump 2. The circulation pump 2 is preferably a variable frequency pump, which can change the power of the circulation pump 2 according to the number of heat exchangers 7 in operation. At the same time, a first regulating valve 8 and a fourth temperature transmitter 14 are respectively installed at the inlet and outlet of the heat exchangers 7. The fourth temperature transmitter 14 measures the temperature of the coolant outlet of the heat exchangers 7 three times. When the temperature of the coolant outlet of the heat exchangers 7 is consistently high, the first regulating valve 8 can be adjusted to increase the flow rate in the heat exchangers 7. When the temperature of the coolant outlet of the heat exchangers 7 is low, the first regulating valve 8 can be adjusted to decrease the flow rate in the heat exchangers 7, thereby reducing the energy consumption of the coolant circulation system while ensuring the heat dissipation effect.

[0055] In some embodiments, a check valve 9 is connected in series at the coolant outlet of each heat exchanger 7.

[0056] like Figure 2 As shown, a check valve 9 is installed at the outlet of the coolant in the heat exchanger 7, which can effectively prevent the coolant in the heat exchanger 7 from flowing back, thereby preventing the heat dissipation of multiple charging piles from affecting each other.

[0057] In some embodiments, a second regulating valve 13 is provided in parallel for a plurality of heat exchangers 7 connected in parallel.

[0058] By increasing the second regulating valve 13, the parallel body of the heat exchanger 7 is directly short-circuited, and the cooling liquid in the storage tank 1 can be directly returned to the storage tank 1 after passing through the circulating pump 2 and the second regulating valve 13, which can avoid the overpressure of the cooling liquid in the charging pile end pipeline and cause the pipe to burst, and can improve the use safety of the equipment.

[0059] In some embodiments, a plurality of groups of the heat exchanger 7 and the circulating pump 2 are connected in series and connected in parallel in the cooling liquid circulating loop.

[0060] A fourth temperature transmitter 14 is arranged at the cooling liquid outlet of each group of the series connection.

[0061] As shown in the accompanying drawings, Figure 3 The circulating pump 2 and the heat exchanger 7 are connected in series to form a single heat dissipation device for the charging pile end, and a plurality of heat dissipation devices for the charging end are connected in parallel and connected in series in the cooling liquid circulating system, and each circulating pump 2 is independently controlled and does not affect each other.

[0062] A check valve 9 is arranged at the inlet of the circulating pump 2 to avoid the mixing of the cooling liquid in the heat dissipation devices of the adjacent charging pile ends, thereby avoiding the influence on the heat dissipation effect.

[0063] In some embodiments, as shown in the accompanying drawings, Figure 4 A bypass pipe 16 is connected in parallel outside the storage tank 1, one end of the bypass pipe 16 is connected to the cooling liquid circulating system through an electromagnetic reversing valve 15, and the other end is connected to the cooling liquid circulating system through a three-way joint.

[0064] When the external temperature is low, the gun wire material is in a low-temperature state, and the flexibility of the gun wire material is reduced, and it is not easy to bend. At this time, the electromagnetic reversing valve 15 is actuated to make the bypass pipe 16 conductive, and the storage tank 1 is short-circuited. At this time, the high-temperature cooling liquid flowing back in the charging pile under operation enters the heat exchanger 7 of the pre-started charging pile through the bypass pipe 16, heats the gun wire of the pre-started charging pile, improves the flexibility of the gun wire, and facilitates the bending.

[0065] In addition to the charging pile heat dissipation system disclosed in the above embodiments, the utility model also provides a charging pile comprising the charging pile heat dissipation system, and the heat exchanger 7 in the charging pile comprises a cooling liquid pipe arranged in the gun wire of the charging gun.

[0066] In the description, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0067] The charging pile heat dissipation system and the charging pile provided by the utility model are introduced in detail. The principle and implementation mode of the utility model are described by applying specific examples. The above embodiment is only used for helping to understand the method and the core idea of the utility model. It should be pointed out that the utility model can be improved and modified in several ways without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A charging pile heat dissipation system, characterized in that, The application relates to a cooling system for a charging pile. The cooling system comprises a cooling liquid circulation system and a refrigerant circulation system. The cooling liquid circulation system comprises a cooling liquid circulation loop and a liquid storage tank (1), a circulating pump (2) and a heat exchanger (7) which are sequentially connected in series in the cooling liquid circulation loop. The refrigerant circulation system comprises a refrigerant circulation loop and a compressor (6), a condenser (5), an expansion valve (4) and an evaporator (3) which are sequentially connected in series in the refrigerant circulation loop.

2. The charging pile heat dissipation system according to claim 1, characterized in that, The evaporator (3) is arranged in the liquid storage tank (1) and is used for heat exchange with the cooling liquid in the liquid storage tank (1).

3. The charging pile heat dissipation system according to claim 1, characterized in that, The cooling liquid outlet and the cooling liquid inlet of the liquid storage tank (1) are arranged at low and high positions of the liquid storage tank (1) respectively, and the refrigerant outlet and the refrigerant inlet of the evaporator (3) are arranged at high and low positions of the liquid storage tank (1) respectively.

4. The charging pile heat dissipation system of claim 1, wherein, A first temperature transmitter (10) is arranged at the cooling liquid outlet of the liquid storage tank (1), and a second temperature transmitter (11) is arranged at the cooling liquid inlet of the liquid storage tank (1).

5. The charging pile heat dissipation system according to claim 1, characterized in that, A third temperature transmitter (12) is arranged in the liquid storage tank (1) and is used for detecting the temperature of the cooling liquid in the liquid storage tank (1).

6. The charging pile heat dissipation system of claim 1, wherein, An insulating layer is arranged outside the liquid storage tank (1) and is used for reducing the direct heat exchange amount between the cooling liquid in the liquid storage tank (1) and the external environment. A plurality of groups of the heat exchanger (7) are connected in parallel and then connected in series in the cooling liquid circulation loop.

7. The charging pile heat dissipation system according to claim 1, characterized in that, A first regulating valve (8) is connected in series at the cooling liquid inlet of each group of the heat exchanger (7), and a fourth temperature transmitter (14) is arranged at the cooling liquid outlet of each group of the heat exchanger (7).

8. The charging pile heat dissipation system of claim 1, wherein, A check valve (9) is connected in series at the cooling liquid outlet of each group of the heat exchanger (7).

9. The charging pile heat dissipation system of claim 1, wherein, A second regulating valve (13) is arranged in parallel at the parallel connection body of the plurality of groups of the heat exchanger (7). A plurality of groups of the heat exchanger (7) and the circulating pump (2) are connected in series and then connected in series in the cooling liquid circulation loop.

10. A charging post, characterized in that, A fourth temperature transmitter (14) is arranged at the cooling liquid outlet of each group of the series connection body. The application further discloses a charging pile cooling system, and the heat exchanger (7) comprises a cooling liquid pipe arranged in a charging gun wire.

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