Charging gun and charging pile

Abstract

The invention discloses a charging gun and a charging pile, and relates to the technical field of new energy equipment, specifically, the charging gun comprises a gun head and a gun line; the gun head comprises at least two groups of mutually insulated gun needles, a U-shaped flow channel is arranged in each gun needle, the open end of each flow channel is located at the near end of the corresponding gun needle, and the closed end of each flow channel is located at the far end of the corresponding gun needle; the runners of the two groups of gun needles are connected in series or in parallel through an insulating tube to form a combined runner; the gun line internally comprises at least two groups of corrugated copper pipes which are insulated from each other, and the two groups of corrugated copper pipes are respectively communicated with two ends of the combined flow channel; according to the charging gun and the charging pile, the U-shaped flow channel is arranged in the gun needle, so that a refrigerating medium can circulate in the gun needle, heat of the gun needle is taken away, effective heat dissipation of the gun needle is achieved, meanwhile, the corrugated copper pipe arranged in the cable serves as a transmission pipeline of the refrigerating medium and a power transmission cable, one pipe has double purposes, the weight of the cable is effectively reduced, and the cost is reduced. And the use convenience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy equipment, and more specifically, to a charging gun. In addition, the present invention also relates to a charging pile including the above-mentioned charging gun. Background Art

[0002] With the development of new energy supercharging technology, the charging power has been significantly improved, and the time required for charging has been significantly reduced. However, the heat generated by the charging equipment has increased seriously. If the charging equipment cannot be cooled down quickly, the equipment will be damaged. In the existing technology, air cooling or liquid cooling is mainly used to dissipate heat for the charging equipment. The main part of the heat dissipation is the power module of the charging pile. The heat dissipation of the cable and the gun head is limited, especially the gun needle in the gun head. Due to its small cross-sectional area and exposed to the outside of the gun head, the corresponding position cannot be equipped with a heat dissipation device, resulting in the heat of the gun needle cannot be quickly taken away, resulting in heat accumulation, which may cause the charging interface to melt in severe cases, causing synchronous damage to the charging equipment; At the same time, as the charging power increases, a larger current needs to pass through the conductive cable in the charging gun, so a larger cable diameter and more effective heat dissipation are required. The existing technologies are mainly air cooling and liquid cooling, and their heat dissipation effects are limited, resulting in a larger cable diameter, which in turn increases the weight of the cable, causing many inconveniences for users when using it.

[0003] In summary, how to solve the problem that the existing charging gun needles cannot achieve effective cooling and the existing cables are heavy and inconvenient to use are issues that urgently need to be solved by technical personnel in this field. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a charging gun, by setting a U-shaped flow channel in the gun needle, so that the refrigerant medium can circulate in the gun needle, take away the heat of the gun needle, and realize effective heat dissipation of the gun needle. At the same time, the corrugated copper tube arranged in the cable is used as a transmission pipeline for the refrigerant medium and a power transmission cable, realizing dual use of one tube, effectively reducing the weight of the cable, and improving the convenience of user use.

[0005] Another object of the present invention is to provide a charging pile including the above-mentioned charging gun, which has the same technical solution and can solve the same technical problem.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A charging gun, comprising a gun head and a gun line; The gun head comprises at least two groups of mutually insulated gun needles, wherein a U-shaped flow channel is arranged inside the gun needle, wherein the open end of the flow channel is located at the proximal end of the gun needle, and the closed end of the flow channel is located at the distal end of the gun needle; the flow channels of the two groups of gun needles are connected in series or in parallel through an insulating tube to form a combined flow channel; The gun line includes at least two groups of mutually insulated corrugated copper tubes, the two groups of corrugated copper tubes are respectively connected to the two ends of the combined flow channel, and the corrugated copper tubes are electrically connected to the gun needles in a one-to-one correspondence.

[0007] Preferably, a wire is wound in the spiral groove of the outer wall of the corrugated copper tube, and a plurality of groups of conductive points are arranged between the wire and the corrugated copper tube, at least two conductive points are respectively located at both ends of the corrugated copper tube, or one end of the wire is electrically connected to the corresponding gun needle.

[0008] Preferably, a temperature monitoring module is provided at the proximal end of the gun needle; The temperature monitoring module is provided with a first temperature monitoring contact and a second temperature monitoring contact. The second temperature monitoring contact is in contact with the gun needle and is used to measure the temperature of the gun needle. When the gun needle is inserted into the charging port of the new energy vehicle, the first temperature monitoring contact can contact the charging port to monitor the temperature of the charging port.

[0009] Preferably, an annular groove is provided at the root of the gun needle, the temperature monitoring module is an annular structure, and the temperature monitoring module is clamped in the annular groove; The first temperature monitoring contact and the second temperature monitoring contact are respectively arranged at two ends of the temperature monitoring module, the second temperature monitoring contact contacts a side wall of the annular groove close to the root of the gun needle, and the first temperature monitoring contact is outside the annular groove.

[0010] A charging pile, comprising any one of the charging guns described above.

[0011] Preferably, it further comprises a temperature control module, wherein the temperature control module, the corrugated copper tube and the combined flow channel are combined together to form a circulation loop; The temperature control module includes an electronic expansion valve, a condenser and a compressor connected in series in sequence; The two ends of the temperature control module are respectively connected to the two groups of corrugated copper tubes through insulating conduits.

[0012] Preferably, the temperature control module further includes a first four-way valve, and the compressor is connected in series in the circulation loop through the first four-way valve.

[0013] Preferably, a second four-way valve is connected in series at both ends of the combined flow channel, and the other two ports of the second four-way valve are connected to both ends of the temperature control module.

[0014] Preferably, the second four-way valve is arranged inside the gun head, and the corrugated copper tube is arranged between the second four-way valve and the temperature control module.

[0015] Compared with the prior art, the charging gun provided by the present invention has at least the following beneficial effects: 1. By setting a U-shaped flow channel inside the gun needle, a circulating refrigerant medium can be passed into the gun needle, thereby achieving heat dissipation and cooling of the gun needle, effectively avoiding the melting of the charging interface; 2. Use a corrugated copper tube as the transmission tube for the refrigerant medium, arrange it inside the gun line, and use its spiral structure to ensure that the gun line has high flexibility, that is, the corrugated copper tube can bend with the bending of the gun line, and when bending, the corrugated copper tube will not collapse, that is, it will not cause the problem of increased flow resistance of the refrigerant medium in the tube; at the same time, the corrugated copper tube can also be used as a conductor for power transmission, realizing dual use of one tube. On the premise of ensuring the current transmission capacity and heat dissipation capacity of the gun line, it effectively reduces the weight of the gun line and improves the user experience.

[0016] The charging pile provided by the present invention, including the above-mentioned charging gun, has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the charging gun provided by the present invention; Figure 2 A top view of the charging gun provided by the present invention; Figure 3 for Figure 2 Sectional view at HH in the middle; Figure 4 This is a schematic structural diagram of the charging gun provided by the present invention from another angle; Figure 5 A schematic diagram of the connection between the temperature control module in the charging pile and the charging gun provided by the present invention; Figure 6 A schematic diagram of another connection method between the temperature control module in the charging pile and the charging gun provided by the present invention; Figure 7 This is a schematic diagram of the structure of the gun needle provided by the present invention; Figure 8 This is a schematic diagram of the assembly of the gun needle and the temperature monitoring module provided by the present invention; Fig. 9 This is a schematic diagram of the structure of the temperature monitoring module provided by the present invention; Fig.10 This is a structural schematic diagram of the temperature monitoring module provided by the present invention from another angle; Fig.11A schematic structural diagram of another embodiment of a gun needle provided by the present invention; Fig.12 A schematic diagram of the end of the gun needle provided by the present invention; Fig.13 for Fig.12 Sectional view at AA; Fig.14 for Fig.13 Sectional view at the middle BB; Fig.15 for Fig.13 Sectional view at CC; Fig.16 for Fig.13 Sectional view at DD; Fig.17 A schematic structural diagram of another embodiment of a gun needle provided by the present invention; Fig.18 for Fig.17 Sectional view at EE; Fig.19 for Fig.17 Sectional view at FF; Fig. 20 for Fig.17 Sectional view at GG; Fig.21 A schematic diagram of the structure of the second end sealing plug provided by the present invention; Fig. 22 This is a schematic structural diagram of another embodiment of the charging gun provided by the present invention.

[0019] Figure 1-Figure 22 middle: 1. needle; 11. first flow channel; 12. second flow channel; 13. third flow channel; 14. annular groove; 2. base; 21. first chamber; 22. second chamber; 23. first partition plate; 24. fourth flow channel; 25. mounting base; 3. Cover plate; 31. First connecting hole; 32. Second connecting hole; 4. A first end sealing plug; 5. Second end sealing plug; 51. Second partition plate; 52. Third communication hole; 53. Plug body; 6. Temperature control module; 61. Electronic expansion valve; 62. Condenser; 63. First four-way valve; 64. Compressor; 65. Second four-way valve; 7. Temperature monitoring module; 71. First temperature monitoring contact; 72. Second temperature monitoring contact; 81. Plug connector; 82. Corrugated copper tube; 83. Insulating tube; 84. Wire; 85. Lined tube. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The core of the present invention is to provide a charging gun. By setting a U-shaped flow channel in the gun needle, the refrigerant medium can circulate in the gun needle, taking away the heat of the gun needle, and realizing effective heat dissipation of the gun needle. At the same time, the corrugated copper tube arranged in the cable is used as a transmission pipeline for the refrigerant medium and a power transmission cable, realizing dual use of one tube, effectively reducing the weight of the cable and improving the convenience of user use.

[0022] Another core of the present invention is to provide a charging pile including the above-mentioned charging gun, which has the same technical solution and can solve the same technical problem.

[0023] Please refer to Figure 1-Figure 22 , a charging gun, comprising a gun head and a gun line; The gun head includes at least two groups of mutually insulated gun needles, a U-shaped flow channel is arranged inside the gun needle, the open end of the flow channel is at the proximal end of the gun needle, and the closed end of the flow channel is at the distal end of the gun needle; the flow channels of the two groups of gun needles are connected in series or in parallel through an insulating tube 83 to form a combined flow channel; The gun line includes at least two groups of mutually insulated corrugated copper tubes 82, the two groups of corrugated copper tubes 82 are respectively connected to the two ends of the combined flow channel, and the corrugated copper tubes 82 are electrically connected to the gun needles in a one-to-one correspondence.

[0024] like Figure 1-Figure 4 As shown, taking the charging gun with two sets of gun needles as an example, U-shaped flow channels are set in both sets of gun needles, and the flow channels of the two sets of gun needles are connected through the insulating tube 83. The refrigerant can circulate in the combined flow channel and flow back to the temperature control module 6 in the charging pile through the corrugated copper tube 82, thereby realizing a large cycle, and then quickly taking away the heat of the gun needles, avoiding heat accumulation at the gun needle position, and thus avoiding melting of the charging interface position; In some embodiments, the temperature control module 6 includes an oil tank and an oil pump connected in series in the circulation, which drives the heat transfer oil to circulate between the oil tank and the combined flow channel. With the help of the large capacity of the oil tank, the constant temperature of the heat transfer oil is achieved, thereby ensuring the constant temperature of the gun needle.

[0025] In some embodiments, the temperature control module 6 uses a structure of a compressor 64 and an electronic expansion valve 61 to realize the circulation of refrigerant in the combined flow channel and the corrugated copper tube 82, and utilizes the heat transfer function of the refrigerant to achieve rapid cooling of the gun needle.

[0026] At the same time, the corrugated copper tube 82 is used as a conduit for the refrigerant medium. It has a certain heat exchange effect and can transport the heat of the gun line to achieve heat dissipation of the gun line and avoid heat accumulation in the gun line. At the same time, the corrugated copper tube 82 has high flexibility and can bend with the gun line without the problem of tube deflation, which will not increase the flow resistance of the refrigerant medium, thereby ensuring the stability of the cooling effect of the charging gun. At the same time, the corrugated copper tube 82 also has electrical conductivity and can be used as a conductor in the gun line to transmit current. The refrigerant is contained in the corrugated copper tube 82 and is in direct contact with the corrugated copper tube 82 as a heating element. The heat exchange efficiency is high, which helps to ensure the heat dissipation effect of the gun line.

[0027] In some embodiments, the inner wall of the corrugated copper tube 82 is provided with an inner lining tube 85 , which is a copper tube with a smooth inner wall, and the outer wall of the inner lining tube 85 is welded and fixed to the small diameter position of the inner wall of the corrugated copper tube 82 .

[0028] like Figure 3 As shown, the inner wall of the corrugated copper tube 82 also has spiral grooves, so the refrigerant medium has a large flow resistance when being transmitted in the corrugated copper tube 82. Therefore, adding an inner lining tube 85 inside it can effectively reduce the flow resistance of the corrugated copper tube 82. At the same time, the inner lining tube 85 is welded to the small diameter position of the corrugated copper tube 82 to avoid the inner lining tube 85 from collapsing when bending. At the same time, the heat conduction capacity between the inner lining tube 85 and the corrugated copper tube 82 can be increased, thereby effectively improving the heat exchange capacity between the refrigerant medium and the corrugated copper tube 82.

[0029] In some embodiments, a wire 84 is wound in the spiral groove of the outer wall of the corrugated copper tube 82, and a plurality of groups of conductive points are arranged between the wire 84 and the corrugated copper tube 82, at least two conductive points are respectively located at the two ends of the corrugated copper tube 82, or one end of the wire 84 is electrically connected to the corresponding gun needle.

[0030] like Figure 3 and Figure 4 As shown, a wire 84 is wound in the spiral groove of the outer wall of the corrugated copper tube 82 to increase the cross-sectional area of ​​the corrugated copper tube 82 for current to pass through, thereby enabling the gun line to carry a larger current, which helps to improve the charging power. At the same time, winding the wire 84 in the spiral groove of the corrugated copper tube 82 helps to improve the space utilization rate in the gun line, thereby reducing the overall cross-sectional radius of the gun line; In some embodiments, the wire 84 is wrapped with an insulating skin and then wound around the corrugated copper tube 82, but a plurality of conductive points are provided between the middle of the wire 84 and the corrugated copper tube 82 to ensure electrical connection between the wire 84 and the corrugated copper tube 82 and achieve synchronous current transmission between the two.

[0031] In some embodiments, a non-insulated wire 84 is directly wound around the outside of the corrugated copper tube 82, and then an insulating layer is provided outside the combination of the two, so that the two can transmit current synchronously.

[0032] In some embodiments, a temperature monitoring module 7 is provided at the proximal end of the gun needle; The temperature monitoring module 7 is provided with a first temperature monitoring contact 71 and a second temperature monitoring contact 72. The second temperature monitoring contact 72 is in contact with the gun needle and is used to measure the temperature of the gun needle. When the gun needle is inserted into the charging port of the new energy vehicle, the first temperature monitoring contact 71 can contact the charging port to monitor the temperature of the charging port.

[0033] like Figure 7-Figure 11 As shown, a temperature monitoring module 7 is provided at the root of the gun needle to detect the temperature of the accessories at its installation position, such as the temperature of the gun needle and the temperature of the charging port at the position where the gun needle is combined. The circulation speed of the refrigerant in the gun needle flow channel or the power of the temperature control module 6 is adjusted according to the detection result to change the heat dissipation effect of the gun needle so that its temperature is maintained within a predetermined range.

[0034] In some embodiments, an annular groove 14 is provided at the root of the gun needle, the temperature monitoring module 7 is an annular structure, and the temperature monitoring module 7 is clamped in the annular groove 14; The first temperature monitoring contact 71 and the second temperature monitoring contact 72 are respectively arranged at two ends of the temperature monitoring module 7 . The second temperature monitoring contact 72 contacts the side wall of the annular groove 14 close to the root of the gun needle, and the first temperature monitoring contact 71 is outside the annular groove 14 .

[0035] like Figure 7-Figure 11 As shown, by setting an annular groove 14 at the root of the gun needle, the annular temperature monitoring module 7 is fixed to prevent it from falling off, and the first temperature monitoring contact 71 and the second temperature monitoring contact 72 are respectively set at the two ends of the annular structure. When the gun needle is inserted into the charging port, the first temperature monitoring contact 71 abuts against the charging port and pushes the temperature monitoring module 7 to move backward, so that the second temperature monitoring contact 72 abuts against the side wall of the annular groove 14, thereby ensuring that the first temperature monitoring contact 71 and the second temperature monitoring contact 72 can obtain good connection stability, thereby ensuring the accuracy of the temperature monitoring result.

[0036] In addition to the charging guns disclosed in the above embodiments, the present invention also provides a charging pile including the above charging gun.

[0037] In some embodiments, the charging pile further includes a temperature control module 6, which is combined with the corrugated copper tube 82 and the combined flow channel to form a circulation loop; The temperature control module 6 includes an electronic expansion valve 61, a condenser 62 and a compressor 64 which are connected in series in sequence; Both ends of the temperature control module 6 are connected to two groups of corrugated copper tubes 82 through insulating conduits.

[0038] like Figure 5 As shown, the temperature control module 6 uses an electronic expansion valve 61, a condenser 62 and a compressor 64 to form a cycle, realizing a large circulation of the refrigerant in the temperature control module 6 and the combined flow channel. At the same time, the compressor 64 uses a variable frequency compressor, which, combined with the electronic expansion valve 61, can realize frequency conversion, which helps to achieve a balance between heat dissipation effect and energy saving.

[0039] In some embodiments, the temperature control module 6 further includes a first four-way valve 63 , and the compressor 64 is connected in series in the circulation loop through the first four-way valve 63 .

[0040] like Figure 5 As shown, the compressor 64 is connected in series in the circulation loop through the first four-way valve 63. By reversing the first four-way valve 63, the flow direction of the refrigerant in the circulation loop can be changed, thereby achieving heating of the gun needle and the gun line, which is suitable for the situation where the gun line becomes hard and difficult to bend due to low temperature in winter, thereby improving the user experience.

[0041] In some embodiments, a second four-way valve 65 is connected in series to both ends of the combined flow channel, and the other two ports of the second four-way valve 65 are connected to both ends of the temperature control module 6 .

[0042] like Figure 6 As shown, when the refrigerant medium flows in the combined flow channel, for the series-connected combined flow channel, the refrigerant medium must flow through the two gun needles in sequence, causing the actual temperature of the upstream gun needle to be lower than the temperature of the downstream gun needle. By adding the second four-way valve 65, the flow direction of the refrigerant medium in the combined flow channel can be changed through the action of the second four-way valve 65, even if the upstream and downstream of the combined flow channel are switched, so that the temperatures of the two gun needles are close to each other.

[0043] As for the parallel combined flow channels, there is also a temperature difference between the two sides of the U-shaped channels. Therefore, adding the second four-way valve 65 can change the flow direction of the refrigerant medium, thereby balancing the temperature difference on both sides of the gun needle.

[0044] In some embodiments, the second four-way valve 65 is disposed inside the gun head, and the corrugated copper tube 82 is disposed between the second four-way valve 65 and the temperature control module 6 .

[0045] In actual use, the second four-way valve 65 is arranged inside the gun head to only change the flow direction of the refrigerant medium in the combined flow channel, which helps to achieve rapid switching of the flow direction of the refrigerant medium in the combined flow channel.

[0046] In some embodiments, the second four-way valve 65 is disposed in the charging pile, and the corrugated copper tube 82 is disposed between the second four-way valve 65 and the combined flow channel. At the same time, the flow direction of the refrigerant medium in the corrugated copper tube 82 and the combined flow channel is changed, which helps to ensure the temperature balance in the gun line.

[0047] like Figure 11-Figure 21As shown, the gun needle includes a needle portion 1 and a base portion 2 fixed to each other, wherein the needle portion 1 is used to be plugged into and connected to the charging socket, and the base portion 2 is used to be fixed to the gun head; A first flow channel 11 and a second flow channel 12 are provided in the needle portion 1 along the length direction, and the first flow channel 11 and the second flow channel 12 are connected at the distal end of the needle portion 1; The base 2 is provided with a first chamber 21 and a second chamber 22 which are communicated with the first flow channel 11 and the second flow channel 12 respectively. The first chamber 21 and the second chamber 22 are provided with a first communication hole 31 and a second communication hole 32 for connecting pipelines respectively.

[0048] The first connecting hole 31 , the first chamber 21 , the first flow channel 11 , the second flow channel 12 , the second chamber 22 and the second connecting hole 32 are sequentially connected in series to form a U-shaped flow channel.

[0049] like Fig.16 and Fig.19 As shown, by arranging the first flow channel 11 and the second flow channel 12 in the needle portion 1 of the gun needle, and connecting the first flow channel 11 and the second flow channel 12 at the distal end of the needle portion 1, the refrigerant can enter from the root of the first flow channel 11, flow to the distal end of the needle portion 1 through the first flow channel 11, and enter the second flow channel 12 at the distal position, and return to the proximal end of the needle portion 1 through the second flow channel 12, so that the refrigerant can circulate in the needle portion 1. During the circulation process, the refrigerant exchanges heat with the needle portion 1, thereby taking away the heat of the needle portion 1, and realizing the heat dissipation of the gun needle.

[0050] At the same time, since the transverse cross-section of the needle portion 1 is small and cannot accommodate the pipe connection of two sets of flow channels at the same time, the first chamber 21 and the second chamber 22 are set at the base 2 to connect the first flow channel 11 and the second flow channel 12 respectively, and the first connecting hole 31 and the second connecting hole 32 for pipe connection are respectively set on the first chamber 21 and the second chamber 22, that is, the larger cross-sectional area of ​​the base 2 is used to realize the installation of the plug connector 81, and the plug connector 81 is used to realize the transfer of the corrugated copper tube 82 or the insulating tube 83 and the connecting hole. At the same time, the refrigerant in the first chamber 21 and the second chamber 22 can also absorb the heat of the base 2, which can also play a positive role in the overall heat dissipation of the gun needle.

[0051] In some embodiments, a fourth flow channel 24 is disposed between the first chamber 21 and the second chamber 22 , and a minimum flow cross-sectional area of ​​the fourth flow channel 24 is smaller than a minimum flow cross-sectional area of ​​the first flow channel 11 , the second flow channel 12 , and a connection position between the first flow channel 11 and the second flow channel 12 .

[0052] like Fig.12As shown, a fourth flow channel 24 is provided between the first chamber 21 and the second chamber 22, and at the same time, the relative relationship between the fourth flow channel 24 and the cross-sectional area of ​​the flow channel in the needle portion 1 is limited, so that while the refrigerant medium circulates in the needle portion 1, part of the refrigerant medium directly returns through the fourth flow channel 24, thereby solving the problem of slow refrigerant medium circulation speed caused by the small flow channel flux in the needle portion 1.

[0053] In some embodiments, a third flow channel 13 is provided at the distal end of the needle portion 1 , and both ends of the third flow channel 13 are respectively connected to the first flow channel 11 and the second flow channel 12 , and a flow cross-sectional area of ​​the third flow channel 13 is equal to the cross-sectional area of ​​the first flow channel 11 and the second flow channel 12 .

[0054] like Fig.16 As shown, a third flow channel 13 is provided inside the distal end of the needle portion 1, and its cross-sectional area is equal to the cross-sectional areas of the first flow channel 11 and the second flow channel 12, so that the refrigerant medium can smoothly pass through the flow channel in the needle portion 1 without increasing the refrigerant medium flow resistance due to the change in the cross-sectional area in the flow channel.

[0055] In some embodiments, a blind hole is provided at the distal end of the needle portion 1, and two through holes are provided in parallel at the bottom of the blind hole, and the two through holes are used as the first flow channel 11 and the second flow channel 12 respectively; A first end sealing plug 4 is provided in the blind hole for sealing, a cavity is provided between the bottom end of the first end sealing plug 4 and the bottom wall of the blind hole, and the cavity conducts the two groups of through holes.

[0056] like Fig.15 and Fig.16 As shown, when processing the needle part 1, a blind hole is firstly drilled at the far end of the needle part 1, and then two through holes are drilled at the bottom of the blind hole. Then, the opening end of the blind hole is sealed with a first end sealing plug 4, so that the two through holes and the cavity at the bottom of the blind hole together form a circulating flow channel for the refrigerant medium to flow through.

[0057] In some embodiments, a through hole is provided in the needle portion 1, and a second end sealing plug 5 is fixedly provided in the through hole; The second end sealing plug 5 includes a second partition plate 51 and a plug body 53 which are fixedly connected to each other. The second partition plate 51 is inserted at the proximal end of the through hole to divide the through hole into a first flow channel 11 and a second flow channel 12. The second partition plate 51 is provided with a third connecting hole 52 connecting the flow channels on both sides at one end adjacent to the plug body 53; the plug body 53 is fixedly and sealedly arranged at the distal end of the through hole.

[0058] like Figure 17-Figure 21As shown, when processing the needle portion 1, first, a through hole is processed at the distal end of the needle portion 1, and the through hole is connected to the cavity in the base 2. Then, a second end sealing plug 5 is installed in the through hole, and the through hole is divided into a first flow channel 11 and a second flow channel 12 by means of a second partition plate 51. At the same time, a third connecting hole 52 is set at the distal end of the second partition plate 51 as a third flow channel 13, so as to realize the processing of the circulating flow channel in the needle portion 1. This processing method has relatively low processing difficulty.

[0059] In some embodiments, an open slot is provided in the base 2, and a first partition plate 23 is provided in the open slot to separate the open slot into a first chamber 21 and a second chamber 22; The open end of the open groove is fixedly and sealedly provided with a cover plate 3 , and the first connecting hole 31 and the second connecting hole 32 are both provided on the surface of the cover plate 3 .

[0060] like Fig.11 , Fig.14 As shown, an open groove is provided inside the base 2, and a cover plate 3 is provided at the open end of the open groove to form the open groove into a closed cavity, and a first partition plate 23 is provided in the cavity to divide the cavity into two first chambers 21 and second chambers 22 respectively connected to the first flow channel 11 and the second flow channel 12, thereby reducing the processing difficulty of the first chamber 21 and the second chamber 22 in the base 2.

[0061] In some embodiments, one side of the first partition plate 23 is fixedly connected to the bottom of the open groove, and a gap is provided between the other side of the first partition plate 23 and the cover plate 3 for connecting the first chamber 21 and the second chamber 22 .

[0062] like Fig.13 As shown, when the cover plate 3 is fixed, the cover plate 3 is fixedly sealed to the base 2 only at its edge, and the lower side of the first partition plate 23 is integrally formed with the base 2, while a certain gap is retained between the upper side and the cover plate 3, serving as the fourth flow channel 24. This is to avoid the difficulty in ensuring the sealing of the cover plate 3 due to the non-coplanarity of the upper side surface of the first partition plate 23 with the sealing surfaces of the base 2 and the cover plate 3 when the cover plate 3 is installed, and to solve the problem that the cross-section of the flow channel in the needle portion 1 is too small to meet the rapid circulation of the refrigerant medium in the pipeline.

[0063] In some embodiments, a mounting base 25 in the form of a stepped surface is provided at the open end of the open groove, and the inner wall surface of the cover plate 3 is in contact and sealed with the surface of the mounting base 25 .

[0064] like Fig.11 and Fig.14 As shown, a mounting base 25 in the form of a step surface is provided at the opening position of the opening groove, wherein the step surface serves as a sealing mounting surface between the base 2 and the cover plate 3, which facilitates the installation and fixation of the cover plate 3. At the same time, using the step surface as a sealing mounting surface helps to reduce the difficulty of machining the mounting surface.

[0065] In some embodiments, the cover plate 3 is a folding plate structure, the normal of the first folding plate of the cover plate 3 is perpendicular to the axis of the needle portion 1, the normal of the second folding plate of the cover plate 3 is an obtuse angle to the axis of the needle portion 1, and the first connecting hole 31 and the second connecting hole 32 are both arranged on the second folding plate of the cover plate 3.

[0066] like Fig.11 As shown, the cover plate 3 adopts a folded plate structure, and the connecting hole is set on the bent surface, which is convenient for the arrangement of the corrugated copper tube 82 and avoids the joints between the pipe and the connecting hole being gathered near the gun needle, resulting in a large space occupation near the gun needle, thereby helping to reduce the volume of the gun head.

[0067] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0068] The above is a detailed introduction to the charging gun and charging pile provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A charging gun, characterized in that: Including gun head and gun line; The gun head comprises at least two groups of mutually insulated gun needles, wherein a U-shaped flow channel is arranged inside the gun needle, wherein the open end of the flow channel is located at the proximal end of the gun needle, and the closed end of the flow channel is located at the distal end of the gun needle; the flow channels of the two groups of gun needles are connected in series or in parallel via an insulating tube (83) to form a combined flow channel; The gun line includes at least two groups of mutually insulated corrugated copper tubes (82), the two groups of corrugated copper tubes (82) are respectively connected to the two ends of the combined flow channel, and the corrugated copper tubes (82) are electrically connected to the gun needles in a one-to-one correspondence.

2. The charging gun according to claim 1, characterized in that: A wire (84) is wound in the spiral groove of the outer wall of the corrugated copper tube (82), and a plurality of groups of conductive points are arranged between the wire (84) and the corrugated copper tube (82), at least two conductive points are respectively located at the two ends of the corrugated copper tube (82), or one end of the wire (84) is electrically connected to the corresponding gun needle.

3. The charging gun according to any one of claims 1 to 2, characterized in that: A temperature monitoring module (7) is provided at the proximal end of the gun needle; The temperature monitoring module (7) is provided with a first temperature monitoring contact (71) and a second temperature monitoring contact (72); the second temperature monitoring contact (72) is in contact with the gun needle and is used to measure the temperature of the gun needle; when the gun needle is inserted into the charging port of the new energy vehicle, the first temperature monitoring contact (71) can be in contact with the charging port to monitor the temperature of the charging port.

4. The charging gun according to claim 3, characterized in that: The root of the gun needle is provided with an annular groove (14), the temperature monitoring module (7) is an annular structure, and the temperature monitoring module (7) is clamped in the annular groove (14); The first temperature monitoring contact (71) and the second temperature monitoring contact (72) are respectively arranged at two ends of the temperature monitoring module (7); the second temperature monitoring contact (72) contacts a side wall of the annular groove (14) close to the root of the gun needle, and the first temperature monitoring contact (71) is located outside the annular groove (14).

5. A charging pile, characterized in that: The charging gun comprises the charging gun as described in any one of claims 1 to 4.

6. The charging pile according to claim 5, characterized in that: It also includes a temperature control module (6), wherein the temperature control module (6), the corrugated copper tube (82) and the combined flow channel are combined to form a circulation loop; The temperature control module (6) comprises an electronic expansion valve (61), a condenser (62) and a compressor (64) which are connected in series in sequence; Both ends of the temperature control module (6) are respectively connected to the two groups of corrugated copper tubes (82) via insulating conduits.

7. The charging pile according to claim 6, characterized in that: The temperature control module (6) further comprises a first four-way valve (63), and the compressor (64) is connected in series in the circulation loop via the first four-way valve (63).

8. The charging pile according to claim 6, characterized in that: A second four-way valve (65) is connected in series at both ends of the combined flow channel, and the other two ports of the second four-way valve (65) are connected to both ends of the temperature control module (6).

9. The charging pile according to claim 8, characterized in that: The second four-way valve (65) is arranged inside the gun head, and the corrugated copper tube (82) is arranged between the second four-way valve (65) and the temperature control module (6).

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