Charging pile liquid cooling system

Abstract

The utility model discloses a liquid cooling system of a charging pile, and belongs to the technical field of charging piles. A charging pile liquid cooling system comprises a first heat exchanger, a draught fan and a charging cable, the air outlet end of the draught fan is provided with the first heat exchanger, the charging cable comprises a first liquid conveying pipe, a second liquid conveying pipe and a wire, the end, close to a charging gun, of the first liquid conveying pipe is closed, and the second liquid conveying pipe is sleeved with the first liquid conveying pipe; the end, close to the charging gun, of the second liquid conveying pipe communicates with the first liquid conveying pipe through a communicating opening, a wire is sleeved with the second liquid conveying pipe, and the ends, away from the charging gun, of the first liquid conveying pipe and the second liquid conveying pipe communicate with the first heat exchanger to form a loop. The cooling device has the advantages that the cooling effect of the charging cable is good, and the cooling effect is ensured when the cooling device is used in summer.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, and in particular to a charging pile liquid cooling system. Background Art

[0002] The function of a charging pile is similar to that of a gas pump in a gas station. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. It can be fixed on the ground or wall, or installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. It can charge various models of electric vehicles according to different voltage levels.

[0003] Charging piles generally provide two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging column to select the corresponding charging method, charging time, and cost data printing. The charging pile display screen can display data such as charging amount, cost and charging time.

[0004] For ultra-fast charging piles, due to the high charging power, the current on the charging gun cable is as high as 600A. The output current of the charging pile is limited by the charging gun line. The copper cable inside the charging gun line conducts electricity, and the heat of the cable is proportional to the square of the current. The greater the charging current, the greater the heat of the cable. To reduce the heat of the cable and avoid overheating, the cross-sectional area of ​​the wire must be increased, and of course the gun line will be heavier. The current 250A national standard charging gun generally uses an 80mm2 cable. The charging gun is very heavy as a whole and not easy to bend. If you want to achieve higher current charging, you can also use dual-gun charging, but this is only a stopgap measure for specific occasions. The ultimate solution for high-current charging can only be liquid-cooled charging.

[0005] Regarding liquid-cooled charging piles, the utility model with announcement number CN220314753U discloses a charging pile liquid cooling system, including a fan and a heat sink arranged at the output end of the fan, a coolant containing tank is provided on one side of the heat sink, a monitoring device is provided on the side of the coolant containing tank away from the heat sink, a refueling port is provided on the top of the coolant containing tank, a circulating pump is provided at the bottom of the coolant containing tank, the input end of the circulating pump is connected to the coolant containing tank, a liquid cooling cable is provided at the output end of the circulating pump, a cooling oil pipe is provided in the liquid cooling cable, and the other end of the cooling oil pipe is connected to the heat sink, and the cooling medium forms a loop between the coolant containing tank and the liquid cooling cable and the heat sink through the circulating pump, so as to achieve the effect of uninterrupted cooling of the charging cable between the charging pile and the charging gun head, and the cooling of the cooling medium is accelerated by the fan, ensuring that the final cooling medium can flow back to the coolant containing tank in time for recycling, thereby improving the heat dissipation efficiency.

[0006] However, as the charging cable is the main heat source of liquid-cooled charging, the above solution simply sets a cooling oil pipe in the liquid-cooled cable, and the cooling effect is general. However, the liquid-cooled cable is crucial to the entire liquid cooling system, so this application makes improvements to it. Utility Model Content

[0007] The utility model aims to solve the problem that the cooling effect of the liquid cooling cable in the existing charging pile liquid cooling system is average, and proposes a charging pile liquid cooling system.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A charging pile liquid cooling system comprises a first heat exchanger, a fan, and a charging cable. The first heat exchanger is arranged at the air outlet end of the fan. The charging cable comprises a first infusion tube, a second infusion tube, and a wire. The end of the first infusion tube close to the charging gun is closed, the interior of the first infusion tube is equipped with the second infusion tube, the end of the second infusion tube close to the charging gun is connected to the first infusion tube through a connecting port, the interior of the second infusion tube is equipped with a wire, and the ends of the first infusion tube and the second infusion tube away from the charging gun are connected to the first heat exchanger to form a loop.

[0010] Further, the first heat exchanger includes an outer shell and a first coil, a first oil tank is provided on the upper part of the outer shell, a liquid outlet joint is provided at the end of the first oil tank, a first coil is provided in the middle part of the outer shell, a second oil tank is provided at the lower part of the outer shell, a liquid inlet joint is provided at the end of the second oil tank, the first oil tank and the second oil tank are connected through the first coil, the first liquid infusion pipe is connected to the liquid inlet joint, the first liquid infusion pipe is provided with a first circulating pump, and the second liquid infusion pipe is connected to the liquid outlet joint.

[0011] Furthermore, the charging cable includes an outer protective layer, an armor layer, a first infusion tube, a second infusion tube, and a filling layer coaxially arranged from outside to inside, the first infusion tube and the second infusion tube are spaced apart, and the second infusion tube and the filling layer are spaced apart, a plurality of wires are arranged inside the filling layer, and the outside of the wires are wrapped with an insulating layer.

[0012] Furthermore, a first support column is arranged between the first infusion tube and the second infusion tube, a second support column is arranged between the second infusion tube and the filling layer, and the first support column and the second support column are arranged at intervals.

[0013] Furthermore, it also includes a second heat exchanger and a cold source. The air inlet end of the fan is provided with a second heat exchanger. The second heat exchanger and the cold source are connected through the first refrigerant pipe and the second refrigerant pipe to form a loop. The second refrigerant pipe is provided with a second circulation pump.

[0014] Furthermore, the cold source includes a second coil buried underground and a coil bracket, the coil bracket is provided with a second coil, the inlet end of the second coil is connected to the first oil tank of the second heat exchanger through a first refrigerant pipe, and the outlet end of the second coil is connected to the second oil tank of the second heat exchanger through a second refrigerant pipe.

[0015] Compared with the prior art, the utility model provides a charging pile liquid cooling system, which has the following beneficial effects:

[0016] The utility model discloses a charging pile liquid cooling system. When in use, the fan is started, and the coolant in the first heat exchanger flows into the second infusion pipe to take away the heat emitted by the wire, and then flows back from the first infusion pipe to the first heat exchanger. The first heat exchanger is cooled by the fan. Compared with the prior art, the second infusion pipe is wrapped around the outside of the wire to take away the heat emitted by the wire in time, and the cooling effect of the charging cable is better.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the explosion effect of the first heat exchanger and the fan of the utility model;

[0020] Figure 3 This is a schematic diagram of a radial section of the internal structure of the charging cable of the present utility model;

[0021] Figure 4 This is a schematic diagram of an axial section of the internal structure of the charging cable of the utility model;

[0022] Figure 5 For the utility model Figure 4 A schematic diagram of the enlarged structure of part A.

[0023] In the figure:

[0024] 1. First heat exchanger; 101. Shell; 102. First coil; 103. Liquid outlet connector; 104. Liquid inlet connector; 105. Fuel tank port; 2. Fan; 3. Second heat exchanger; 4. Charging cable; 401. Outer protective layer; 402. Armor layer; 403. First infusion pipe; 404. First support column; 405. Second infusion pipe; 406. Second support column; 407. Filling layer; 408. Insulating layer; 409. Wire; 410. First circulation pump; 411. Connecting port; 5. Charging gun; 6. Cold source; 601. Second coil; 602. First refrigerant pipe; 603. Second refrigerant pipe; 604. Second circulation pump; 605. Coil bracket. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-5 The utility model provides a charging pile liquid cooling system, comprising a first heat exchanger 1, a fan 2, and a charging cable 4. The first heat exchanger 1 is provided at the air outlet end of the fan 2. The charging cable 4 comprises a first infusion tube 403, a second infusion tube 405, and a wire 409. The end of the first infusion tube 403 close to the charging gun 5 is closed, and the second infusion tube 405 is sleeved inside the first infusion tube 403. The end of the second infusion tube 405 close to the charging gun 5 is connected to the first infusion tube 403 through a connecting port 411. The second infusion tube 405 is sleeved inside the wire 409. The ends of the first infusion tube 403 and the second infusion tube 405 away from the charging gun 5 are connected to the first heat exchanger 1 to form a loop.

[0027] The first heat exchanger 1 is used as a condenser and is filled with coolant to dissipate the heat carried by the coolant.

[0028] The coolant flows from the first heat exchanger 1 through the second infusion pipe 405 into the charging cable 4. After the heat dissipated outward by the wire 409 is combined with the coolant in the second infusion pipe 405, the coolant in the second infusion pipe 405 absorbs the heat and then flows into the first infusion pipe 403 through the connecting port 411. Then, it flows back from the first infusion pipe 403 to the first heat exchanger 1. The fan 2 blows cold air to the coolant to take away the heat of the coolant.

[0029] The first heat exchanger 1 includes a shell 101 and a first coil 102. A first oil tank is arranged on the upper part of the shell 101, and a liquid outlet joint 103 is arranged at the end of the first oil tank. The first coil 102 is arranged in the middle part of the shell 101. A second oil tank is arranged at the lower part of the shell 101, and a liquid inlet joint 104 is arranged at the end of the second oil tank. The first oil tank and the second oil tank are connected through the first coil 102, the first liquid infusion pipe 403 is connected to the liquid inlet joint 104, the first liquid infusion pipe 403 is arranged on the first circulation pump 410, and the second liquid infusion pipe 405 is connected to the liquid outlet joint 103.

[0030] An oil tank opening 105 is installed on the top of the first oil tank, and coolant is added into the first oil tank through the oil tank opening 105 .

[0031] The first oil tank is connected to the outlet end of the first coil 102 , and the first oil tank is connected to the liquid outlet joint 103 . The coolant flows from the first coil 102 into the first oil tank, and then flows out from the liquid outlet joint 103 .

[0032] The second oil tank is connected to the inlet end of the first coil 102, and the first oil tank is connected to the liquid outlet connector 103. The coolant flows back from the first liquid infusion pipe 403 to the second oil tank and then enters the first coil 102. The fan 2 faces the first coil 102 to cool the coolant.

[0033] The charging cable 4 includes an outer protective layer 401, an armor layer 402, a first infusion tube 403, a second infusion tube 405, and a filling layer 407 coaxially arranged from the outside to the inside. The first infusion tube 403 and the second infusion tube 405, and the second infusion tube 405 and the filling layer 407 are spaced apart. A plurality of wires 409 are arranged inside the filling layer 407, and the outside of the wires 409 is wrapped with an insulating layer 408.

[0034] The outer protective layer 401 is a polyvinyl chloride sheath, the armor layer 402 is a corrugated aluminum sheath, the first infusion tube 403 and the second infusion tube 405 are both heat-insulating hoses, and the filling layer 407 is an insulating heat-conducting rubber.

[0035] The space between the first infusion tube 403 and the second infusion tube 405 forms a reflux channel for the cooling liquid, and the space between the second infusion tube 405 and the filling layer 407 forms an inflow channel for the cooling liquid.

[0036] The outer side of the second infusion tube 405 can be further wrapped with a heat-insulating layer, and the heat-insulating layer uses heat-insulating silica gel to further improve the heat-insulating effect and reduce the temperature influence of the coolant in the reflux channel on the coolant in the inflow channel.

[0037] The insulating layer uses insulating skin to prevent leakage between the wires 409.

[0038] A first support column 404 is disposed between the first infusion tube 403 and the second infusion tube 405 , and a second support column 406 is disposed between the second infusion tube 405 and the filling layer 407 . The first support column 404 and the second support column 406 are disposed at intervals.

[0039] The first support column 404 and the second support column 406 are distributed in a cross-shaped pattern in the circumferential direction of the charging cable 4 and are evenly distributed in the axial direction of the charging cable 4, so that the coolant can flow smoothly in the inflow channel and the return channel.

[0040] The device also includes a second heat exchanger 3 and a cold source 6. The second heat exchanger 3 is provided at the air inlet end of the fan 2. The second heat exchanger 3 and the cold source 6 are connected to form a loop through a first refrigerant pipe 602 and a second refrigerant pipe 603. A second circulation pump 604 is provided on the second refrigerant pipe 603.

[0041] The structure of the second heat exchanger 3 is the same as that of the first heat exchanger 1 . The second heat exchanger 3 is used as an evaporator and is also filled with coolant.

[0042] When the device is used in summer, the high air temperature will affect the cooling effect of the coolant in the first heat exchanger 1. The cold energy of the cold source 6 is carried by the second heat exchanger 3, and the fan 2 takes away the cold energy from the air inlet end and sends it to the surface of the first heat exchanger 1 to ensure the cooling effect of the first heat exchanger 1 in high temperature weather.

[0043] The cold source 6 includes a second coil 601 buried underground and a coil bracket 605. The second coil 601 is arranged on the coil bracket 605. The inlet end of the second coil 601 is connected to the first oil tank of the second heat exchanger 3 through the first refrigerant pipe 602, and the outlet end of the second coil 601 is connected to the second oil tank of the second heat exchanger 3 through the second refrigerant pipe 603.

[0044] The second coil 601 is buried underground. When the temperature is high in summer, the underground temperature is relatively low. The second circulation pump 604 is started to pump the coolant into the second coil 601. After absorbing the underground cold, it flows back to the second heat exchanger 3. After the cold is lost through the second heat exchanger 3, it flows back to the second coil 601 through the first refrigerant pipe 602.

[0045] Working principle: When in use, start the fan 2 and the first circulation pump 410, the coolant in the second oil tank is cooled after passing through the first coil 102, and carries the cold energy from the second infusion pipe 405 into the charging cable 4, absorbs the heat of the wire 409, flows into the first infusion pipe 403 through the connecting port 411, and finally flows back to the first oil tank.

[0046] When used in summer, the fan 2 and the first circulation pump 410 are started synchronously. The second circulation pump 604 causes the coolant in the second heat exchanger 3 to flow into the second coil 601 through the first refrigerant pipe 602, and after absorbing the underground cold, it flows back to the second heat exchanger 3 from the second refrigerant pipe 603. The cold flows from the air inlet end of the fan 2 to the first heat exchanger 1 to cool the coolant in the first heat exchanger 1.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A charging pile liquid cooling system, comprising a first heat exchanger (1), a fan (2), and a charging cable (4), wherein the first heat exchanger (1) is arranged at the air outlet end of the fan (2), and characterized in that: The charging cable (4) comprises a first infusion tube (403), a second infusion tube (405), and a wire (409); the end of the first infusion tube (403) close to the charging gun (5) is closed; the second infusion tube (405) is sleeved inside the first infusion tube (403); the end of the second infusion tube (405) close to the charging gun (5) is connected to the first infusion tube (403) via a connecting port (411); the wire (409) is sleeved inside the second infusion tube (405); the ends of the first infusion tube (403) and the second infusion tube (405) away from the charging gun (5) are connected to the first heat exchanger (1) to form a loop.

2. A charging pile liquid cooling system according to claim 1, characterized in that: The first heat exchanger (1) comprises a shell (101) and a first coil (102); a first oil tank is arranged on the upper part of the shell (101); a liquid outlet joint (103) is arranged at the end of the first oil tank; a first coil (102) is arranged in the middle part of the shell (101); a second oil tank is arranged on the lower part of the shell (101); a liquid inlet joint (104) is arranged at the end of the second oil tank; the first oil tank and the second oil tank are connected via the first coil (102); the first liquid infusion pipe (403) is connected to the liquid inlet joint (104); a first circulating pump (410) is arranged on the first liquid infusion pipe (403); and the second liquid infusion pipe (405) is connected to the liquid outlet joint (103).

3. A charging pile liquid cooling system according to claim 1, characterized in that: The charging cable (4) comprises an outer protective layer (401), an armor layer (402), a first infusion tube (403), a second infusion tube (405), and a filling layer (407) which are coaxially arranged from outside to inside, the first infusion tube (403) and the second infusion tube (405), and the second infusion tube (405) and the filling layer (407) are arranged at intervals, a plurality of wires (409) are arranged inside the filling layer (407), and the outside of the wires (409) is wrapped with an insulating layer (408).

4. A charging pile liquid cooling system according to claim 3, characterized in that: A first support column (404) is provided between the first infusion tube (403) and the second infusion tube (405), and a second support column (406) is provided between the second infusion tube (405) and the filling layer (407), and the first support column (404) and the second support column (406) are both arranged at intervals.

5. The charging pile liquid cooling system according to claim 1, characterized in that: It also includes a second heat exchanger (3) and a cold source (6), wherein the air inlet end of the fan (2) is provided with a second heat exchanger (3), and the second heat exchanger (3) and the cold source (6) are connected to form a loop via a first refrigerant pipe (602) and a second refrigerant pipe (603), and a second circulation pump (604) is provided on the second refrigerant pipe (603).

6. A charging pile liquid cooling system according to claim 5, characterized in that: The cold source (6) comprises a second coil (601) buried underground and a coil support (605), wherein the second coil (601) is arranged on the coil support (605), and the inlet end of the second coil (601) is connected to the first oil tank of the second heat exchanger (3) via a first refrigerant pipe (602), and the outlet end of the second coil (601) is connected to the second oil tank of the second heat exchanger (3) via a second refrigerant pipe (603).

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