A quick connector without residual liquid

Abstract

The utility model discloses a kind of fast plug-in connectors without residual liquid, including connector body and the auxiliary liquid suction cylinder in its cooling liquid channel. The liquid suction section of auxiliary liquid suction cylinder and the residual liquid area of cooling liquid channel inner wall are formed, and its lateral wall is equipped with the upper air inlet and lower air inlet of residual liquid area and auxiliary liquid channel. When draining, airflow flows in auxiliary liquid channel, part of gas enters residual liquid area through lower air inlet, and then carries residual liquid and backflows from upper air inlet;The negative pressure effect at upper air inlet can produce strong suction force, completely remove the cooling liquid in residual liquid area, effectively prevent residual liquid from dripping when switching tester. The utility model is also provided with pneumatic locking device, gas is introduced through pneumatic locking port to push pneumatic piston, so that inflatable sealing ring is deformed to lock the connecting port of sealing device, and the integration design of no residual liquid and fast and reliable connection is realized.

Description

Technical Field

[0001] This utility model relates to the field of new energy drainage structure technology, and in particular to a quick-connect connector with no residual liquid. Background Technology

[0002] In the field of new energy, components such as motors, motor controllers, inverters, chargers, charging piles, and OBCs all require heat dissipation. The heat dissipation system on these devices is usually liquid cooling, which requires the installation of various connection ports on these devices.

[0003] When testing the cooling system of the aforementioned devices, a quick-connect connector is typically used to connect to the connector port, and coolant is injected into the device to lower its temperature. After the test is completed, air is drawn from the connector port to drain the coolant. Once the coolant has been completely drained, the quick-connect connector is connected to the connector port of the next device to be tested, and the above process is repeated to test the cooling systems of multiple devices one by one.

[0004] However, due to the different sizes of the connectors in various new energy devices, coolant can easily remain on the inner wall of the quick-connect connector. This means that when the quick-connect connector is separated from the connector, the remaining coolant will leak out. This residual coolant dripping onto the workbench or product not only requires cleaning up, wasting coolant, but also contaminates the product and the testing environment. Utility Model Content

[0005] This invention provides a quick-connect connector with no residual coolant, aiming to solve the problem that coolant is easily left inside the quick-connect connector when testing the cooling system of devices related to the new energy field.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model embodiment provides a quick-connect connector with no residual liquid, comprising: A connector body, wherein a coolant channel is provided through the connector body along its axial direction; An auxiliary liquid suction cylinder is disposed within the coolant channel; the auxiliary liquid suction cylinder is provided with an auxiliary liquid channel extending through it along its axial direction. The auxiliary liquid suction cylinder is provided with a liquid suction section, the diameter of which is smaller than the diameter of the coolant channel; the outer wall of the liquid suction section and the inner wall of the coolant channel cooperate to form a residual liquid area. The sidewall of the liquid absorption section is provided with several upper air inlets and lower air inlets along the axial direction, and the several upper air inlets and lower air inlets connect the residual liquid area with the auxiliary liquid channel.

[0007] In one embodiment, a plurality of the upper air inlets and the lower air inlets are evenly distributed along the circumference of the auxiliary liquid channel.

[0008] In one embodiment, the diameter of the lower air inlet gradually decreases along the outer radial direction of the auxiliary liquid channel.

[0009] In one embodiment, the diameter of the upper air inlet gradually increases along the outer radial direction of the auxiliary liquid channel.

[0010] In one embodiment, the axis of the upper air inlet is inclined toward the direction of the lower air inlet.

[0011] In one embodiment, the connector body includes a connector housing and a pneumatic locking device disposed within the connector housing.

[0012] In one embodiment, the pneumatic locking device includes an expansion sealing ring and a pneumatic piston that slides within the connector housing; The pneumatic piston has a piston channel extending through its length, the connector housing has a pneumatic locking port communicating with the pneumatic piston, and the expansion sealing ring is located at the end of the pneumatic piston away from the pneumatic locking port.

[0013] In one embodiment, the connector housing is provided with a first mounting channel, a second mounting channel, and a third mounting channel with gradually increasing diameters along the axial direction; The pneumatic piston includes a first piston section that mates with the second mounting channel and a second piston section that mates with the third mounting channel; The outer wall of the first piston section is provided with a first annular groove, and a first gas seal ring is provided in the first annular groove; the first gas seal ring is sealed to the side wall of the second mounting channel. The outer wall of the second piston section is provided with a second annular groove, and a second gas seal ring is provided in the second annular groove; the second gas seal ring is sealed to the side wall of the third mounting channel. The pneumatic locking port is connected to the third mounting channel at a position close to the second mounting channel.

[0014] In one embodiment, the piston channel includes a first piston channel and a second piston channel; the diameter of the second piston channel is larger than the diameter of the first piston channel. The auxiliary suction cylinder has a reduced diameter section at one end away from the suction section, and the diameter of the reduced diameter section is smaller than the diameter of the auxiliary suction cylinder. The reduced diameter section mates with the first piston channel; the auxiliary suction cylinder mates with the second piston channel.

[0015] In one embodiment, the outer wall of the auxiliary suction cylinder is provided with a plurality of auxiliary sealing grooves along its axial direction, and each of the plurality of auxiliary sealing grooves is provided with an auxiliary sealing ring.

[0016] The beneficial effects of this utility model compared with the prior art are as follows: By setting an auxiliary liquid suction cylinder in the connector body, with an upper air inlet and a lower air inlet on the side wall of the auxiliary liquid suction cylinder, when the cooling system of the new energy device is tested and the coolant needs to be sucked out, the gas flows in the auxiliary liquid channel and the coolant channel. Some of the gas passes through the lower air inlet and the upper air inlet in sequence. The gas enters the residual liquid area through the lower air inlet, and then flows back into the auxiliary liquid channel through the upper air inlet, thereby carrying out the residual liquid in the residual liquid area. When the gas flows through the upper air inlet, a negative pressure is formed at the upper air inlet position, further increasing the pressure difference between the upper air inlet and the lower air inlet, thereby ensuring that the residual liquid in the residual liquid area can be quickly drained, thus preventing residual liquid from remaining in the coolant channel. Furthermore, when switching the connection port 5 of different new energy devices, it can effectively prevent coolant dripping.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of a liquid-free quick-connect connector provided for an embodiment of this utility model; Figure 2 An exploded view of a liquid-free quick-connect connector provided for an embodiment of this utility model; Figure 3 A cross-sectional view of a liquid-free quick-connect connector provided for an embodiment of this utility model; Figure 4 A cross-sectional view of several parts of the connector body of a liquid-free quick-connect connector provided for an embodiment of this utility model; Figure 5 A cross-sectional view of an auxiliary suction cylinder for a liquid-free quick-connect connector provided in an embodiment of this utility model; Figure 6 This is a cross-sectional view of a liquid-free quick-connect connector provided in this embodiment of the present invention when it is mated with the connection port of a new energy device.

[0019] Figure label: 1. Coolant passage; 11. Residual liquid area; 2. Auxiliary suction cylinder, 21. Auxiliary liquid channel, 22. Suction section, 221. Upper air inlet, 222. Lower air inlet, 23. Reduction section, 24. Auxiliary sealing groove, 241. Auxiliary sealing ring; 3. Connector housing; 31. Housing body; 311. First mounting channel; 312. Second mounting channel; 313. Third mounting channel; 314. Pneumatic locking port; 315. First mounting shoulder; 316. Second mounting shoulder; 32. Housing sleeve. 4. Pneumatic locking device; 41. Expansion sealing ring; 42. Pneumatic piston; 421. First piston section; 4211. First annular groove; 4212. First air seal ring; 422. Second piston section; 4221. Second annular groove; 4222. Second air seal ring; 423. Piston channel; 4231. First piston channel; 4232. Second piston channel; 43. Transmission ring; 5. Connection port. Detailed Implementation

[0020] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] Please see Figure 1-6 This utility model provides a liquid-free quick-connect connector, comprising: A connector body, wherein a coolant channel 1 is provided through the connector body along its axial direction; An auxiliary liquid suction cylinder 2 is disposed inside the coolant channel 1; the auxiliary liquid suction cylinder 2 is provided with an auxiliary liquid channel 21 extending through it along its axial direction. The auxiliary liquid suction cylinder 2 is provided with a liquid suction section 22, the diameter of which is smaller than the diameter of the cooling liquid channel 1; the outer side wall of the liquid suction section 22 and the inner side wall of the cooling liquid channel 1 cooperate to form a residual liquid area 11. The sidewall of the liquid absorption section 22 is provided with a plurality of upper air inlets 221 and lower air inlets 222 through the axial direction, and the plurality of upper air inlets 221 and lower air inlets 222 connect the residual liquid area 11 to the auxiliary liquid channel 21.

[0025] In this embodiment, an auxiliary suction cylinder 2 is provided in the connector body. The side wall of the auxiliary suction cylinder 2 is provided with an upper air inlet 221 and a lower air inlet 222. When the cooling system test of the new energy device is completed, and the coolant in the new energy device needs to be sucked out, the gas flows in the auxiliary liquid channel 21 and the cooling liquid channel 1. Some of the gas passes through the lower air inlet 222 and the upper air inlet 221 in sequence. The gas enters the residual liquid area 11 through the lower air inlet 222. Then the gas flows back to the auxiliary liquid channel 21 through the upper air inlet 221, thereby carrying out the residual liquid in the residual liquid area 11. When the gas flows through the upper air inlet 221, most of the air will be drawn away at the upper air inlet 221, forming a negative pressure at the position of the upper air inlet 221, further increasing the pressure difference between the upper air inlet 221 and the lower air inlet 222, thereby ensuring that the residual liquid in the residual liquid area 11 can be drained quickly, thereby preventing residual liquid from remaining in the cooling liquid channel 1. Furthermore, when switching between different new energy device connection ports 5, it can effectively prevent coolant dripping.

[0026] In this embodiment, several upper air inlets 221 and several lower air inlets 222 are arranged in a ring on the side wall of the auxiliary liquid channel 21. The position corresponding to the liquid suction section 22 is the position where residual liquid is most likely to accumulate in the coolant channel 1.

[0027] In a further embodiment, such as Figure 3 or Figure 5 As shown, several upper air inlets 221 and lower air inlets 222 are evenly distributed along the circumference of the auxiliary liquid channel 21.

[0028] In this embodiment, several upper air inlets 221 and several lower air inlets 222 are evenly distributed around the auxiliary liquid channel 21, enabling the discharge of residual liquid in the circumferential direction and ensuring that the coolant remaining in the residual liquid area 11 can be fully discharged. In this embodiment, there are eight upper air inlets 221 and eight lower air inlets 222.

[0029] In a further embodiment, such as Figure 3 and Figure 5 As shown, the diameter of the lower air inlet 222 gradually decreases along the outer radial direction of the auxiliary liquid channel 21.

[0030] In this embodiment, by setting the lower air inlet 222 into a funnel shape that gradually narrows in the outward radial direction, the cross-sectional area of ​​the lower air inlet 222 will gradually decrease as the gas flows from the lower air inlet 222 towards the residual liquid zone 11. This causes the gas pressure to gradually increase towards the residual liquid zone 11, increasing the intake pressure into the residual liquid zone 11, thereby enabling the residual liquid remaining in the residual liquid zone 11 to be discharged more efficiently.

[0031] In a further embodiment, such as Figure 3 and Figure 5 As shown, the diameter of the upper air inlet 221 gradually increases along the outer radial direction of the auxiliary liquid channel 21.

[0032] In this embodiment, by setting the upper air inlet 221 into a funnel shape that gradually increases in the direction towards the residual liquid area 11, the upper air inlet 221 can increase the discharge area of ​​the residual liquid, thereby enabling the residual liquid in the residual liquid area 11 to be discharged more efficiently. When the gas flows in the auxiliary liquid channel 21, it is easier to form a negative pressure in the upper air inlet 221, further increasing the pressure difference between the upper air inlet 221 and the lower air inlet 222. This pressure difference can ensure that the coolant remaining in the residual liquid area 11 can be drained quickly.

[0033] The axis of the upper air inlet 221 is inclined toward the lower air inlet 222.

[0034] like Figure 5 As shown, in this embodiment, the axis of the upper air inlet 221 is inclined, and the angle between the axis of the upper air inlet 221 and the axis of the coolant passage 1 is C, with C ranging from 25° to 60°. In this embodiment, C is 45°.

[0035] In this embodiment, the upper air inlet 221 is inclined so that when the gas flows in the auxiliary liquid channel 21, the direction of gas flow and the axial direction of the upper air inlet 221 form a certain angle, thereby ensuring that the gas will not flow into the upper air inlet 221, making it easier to form a negative pressure at the position of the upper air inlet 221, so that the residual liquid can be discharged more smoothly.

[0036] In one embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, the connector body includes a connector housing 3 and a pneumatic locking device 4 disposed within the connector housing 3.

[0037] The pneumatic locking device 4 includes an expansion sealing ring 41 and a pneumatic piston 42 that slides within the connector housing 3; The pneumatic piston 42 has a piston channel 423 extending through it along its length, and the connector housing 3 has a pneumatic locking port 314 communicating with the pneumatic piston 42. The expansion sealing ring 41 is located at the end of the pneumatic piston 42 away from the pneumatic locking port 314.

[0038] In this embodiment, when the connection port 5 of the new energy device is inserted into the quick-connect connector without residual liquid, the inner diameter of the connection port 5 of the new energy device corresponds to that of the expansion sealing ring 41. At this time, air is introduced into the connector housing 3 through the pneumatic locking port 314. Under the push of the air, the pneumatic piston 42 moves toward the expansion sealing ring 41. The expansion sealing ring 41 deforms under the thrust of the pneumatic piston 42, causing the inner diameter of the expansion sealing ring 41 to decrease, thereby sealing and locking the connection port 5, so that the connection port 5 of the new energy device can be tightly sealed and connected with the quick-connect connector without residual liquid.

[0039] like Figure 4 As shown, the specific structure of the connector housing 3 and the pneumatic piston 42 in this embodiment is as follows: The connector housing 3 is provided with a first mounting channel 311, a second mounting channel 312 and a third mounting channel 313 with gradually increasing diameters along the axial direction. The pneumatic piston 42 includes a first piston section 421 that cooperates with the second mounting channel 312 and a second piston section 422 that cooperates with the third mounting channel 313; The outer wall of the first piston section 421 is provided with a first annular groove 4211, and a first gas seal ring 4212 is provided in the first annular groove 4211; the first gas seal ring 4212 is sealed and fitted with the side wall of the second mounting channel 312. The outer wall of the second piston section 422 is provided with a second annular groove 4221, and a second gas seal ring 4222 is provided in the second annular groove 4221; the second gas seal ring 4222 is sealed to the side wall of the third mounting channel 313. The pneumatic locking port 314 is connected to the third mounting channel 313 near the position of the second mounting channel 312.

[0040] In this embodiment, the pneumatic locking port 314 is disposed between the first gas sealing ring 4212 and the second gas sealing ring 4222, so that when air enters the pneumatic locking port 314, the pressure of the gas can act on the end of the second piston section 422, so that the pneumatic piston 42 can move smoothly under the action of gas pressure.

[0041] In a further embodiment, such as Figure 4As shown, the connector housing 3 in this embodiment includes a housing body 31 and a housing sleeve 32. The first mounting channel 311, the second mounting channel 312, the third mounting channel 313 and the pneumatic locking port 314 are all provided on the housing body 31, and the third mounting channel 313 is sleeved on the periphery of the housing sleeve 32.

[0042] Specifically, in this embodiment, the second mounting channel 312 forms a first mounting shoulder 315 at a position close to the first mounting channel 311, and the third mounting channel 313 forms a second mounting shoulder 316 at a position close to the second mounting channel 312.

[0043] The end of the first piston section 421 furthest from the second piston section 422 abuts against the first mounting shoulder 315, and the end face of the second piston section 422 near the first piston section 421 abuts against the second mounting shoulder 316. A pneumatic locking port 314 is located at the second mounting shoulder 316, allowing gas entering through the pneumatic locking port 314 to directly act on the end face of the second piston section 422 near the first piston section 421.

[0044] The piston passage 423 includes a first piston passage 4231 and a second piston passage 4232 with gradually increasing diameters. In this embodiment, the first mounting passage 311, the first piston passage 4231, the second piston passage 4232 and the inner wall of the expansion sealing ring 41 constitute the entire coolant passage 1.

[0045] In this embodiment, the diameter of the auxiliary fluid channel 21 is less than or equal to the diameter of the first mounting channel 311. This allows the coolant to flow smoothly through the auxiliary fluid channel 21 into the first mounting channel 311 and then out of the first mounting channel 311.

[0046] In a further embodiment, a transmission ring 43 is provided between the pneumatic piston 42 and the expansion sealing ring 41. The pressure of the pneumatic piston 42 acts on the transmission ring 43, and the transmission ring 43 then acts on the expansion sealing ring 41, causing the expansion sealing ring 41 to deform.

[0047] The transmission ring 43 enables the force acting on the expansion seal ring 41 to be more uniform, and the deformation of the expansion seal ring 41 to be more uniform, thereby enabling the expansion seal ring 41 to be tightly connected to the connection port 5 of the new energy device.

[0048] In a further embodiment, such as Figure 5 As shown, the auxiliary suction cylinder 2 has a reduced diameter section 23 at one end away from the suction section 22, and the diameter of the reduced diameter section 23 is smaller than the diameter of the auxiliary suction cylinder 2. The reduced diameter section 23 is fitted with the first piston channel 4231; the auxiliary suction cylinder 2 is fitted with the second piston channel 4232.

[0049] The outer wall of the auxiliary suction cylinder 2 is provided with a plurality of auxiliary sealing grooves 24 along its axial direction, and each of the plurality of auxiliary sealing grooves 24 is provided with an auxiliary sealing ring 241.

[0050] This application provides three auxiliary sealing grooves 24, which can increase the sealing between the outer wall of the auxiliary suction cylinder 2 and the second piston channel 4232, thereby preventing residual liquid from accumulating in the auxiliary suction cylinder 2.

[0051] The working principle of this application is as follows, mainly including the residual liquid removal process and the pneumatic locking process.

[0052] (1) Residual liquid removal process: An auxiliary suction cylinder 2 is installed in the coolant channel 1 of the connector body. The suction section 22 of the suction cylinder 2 forms an annular "residual liquid area 11" between itself and the inner wall of the coolant channel 1, which is the place where coolant is most likely to accumulate.

[0053] When drainage is required, the gas flows at high speed in the central "auxiliary liquid channel 21" of the auxiliary suction cylinder 2.

[0054] A portion of the gas enters the residual liquid zone 11 through the lower air inlet 222.

[0055] Subsequently, the gas carrying the residual liquid in the residual liquid zone 11 flows back to the auxiliary liquid channel 21 through the upper air inlet 221.

[0056] As the gas flows through the narrow upper air inlet 221, its velocity increases. According to Bernoulli's principle, the pressure at this point decreases, creating a local negative pressure zone. This negative pressure generates a strong suction force, which not only helps to remove the gas-liquid mixture from the lower air inlet 222, but also greatly enhances the pressure difference between the upper air inlet 221 and the lower air inlet 222. Thus, like a "vacuum cleaner," it efficiently and completely empties and removes the residual liquid in the residual liquid zone 11.

[0057] (2) Pneumatic locking process: When the connection port 5 of the new energy device is inserted, gas is introduced into the pneumatic locking port 314 of the connector body to push the pneumatic piston 42 forward.

[0058] The pneumatic piston 42 compresses the expansion sealing ring 41, causing it to deform and its inner diameter to shrink, thereby tightly locking and sealing the connection port 5 of the new energy device, achieving fast and reliable connection and sealing.

[0059] Compared with the prior art, this application has the following advantages: (1) Completely eliminate residual liquid: Through the design of the auxiliary liquid suction tube 2, the coolant in the residual liquid area 11 that is difficult to drain in traditional connectors can be actively and quickly removed, achieving true "no residual liquid".

[0060] (2) Prevent cross-contamination and leakage: When switching between different new energy devices, coolant dripping is avoided, cross-contamination between different systems is prevented, and the working environment is kept clean and safe.

[0061] (3) High cleaning efficiency: The funnel-shaped design of the upper air inlet 221 and the lower air inlet 222 optimizes the airflow and improves the drainage efficiency. The inclined design of the upper air inlet 221 prevents the gas in the auxiliary liquid channel 21 from rushing in directly, which is more conducive to the formation of negative pressure and further improves the suction effect. The uniformly arranged annular arrangement of the upper air inlet 221 and the lower air inlet 222 ensures that the residual liquid area 11 can be cleaned evenly and thoroughly in the circumferential direction without dead corners.

[0062] (4) Reliable connection and good sealing: The pneumatic locking method is adopted, with large and uniform locking force. The expansion sealing ring 41 achieves a highly reliable seal, which is suitable for high-pressure cooling systems.

[0063] (5) Compact structure and high integration: The residual liquid removal function and quick plug-in locking function are highly integrated into a connector body. The structure is ingenious and does not increase external complexity.

[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A quick-connect connector with no residual liquid, characterized in that, include: A connector body, wherein a coolant channel is provided through the connector body along its axial direction; An auxiliary liquid suction cylinder is disposed within the coolant channel; the auxiliary liquid suction cylinder is provided with an auxiliary liquid channel extending through it along its axial direction. The auxiliary liquid suction cylinder is provided with a liquid suction section, the diameter of which is smaller than the diameter of the coolant channel; the outer wall of the liquid suction section and the inner wall of the coolant channel cooperate to form a residual liquid area. The sidewall of the liquid absorption section is provided with several upper air inlets and lower air inlets along the axial direction, and the several upper air inlets and lower air inlets connect the residual liquid area with the auxiliary liquid channel.

2. The liquid-free quick-connect connector according to claim 1, characterized in that, Several of the upper air inlets and the lower air inlets are evenly distributed along the circumference of the auxiliary liquid channel.

3. The liquid-free quick-connect connector according to claim 1, characterized in that, The diameter of the lower air inlet gradually decreases along the outer radial direction of the auxiliary liquid channel.

4. The liquid-free quick-connect connector according to claim 1 or 3, characterized in that, The diameter of the upper air inlet gradually increases along the outer radial direction of the auxiliary liquid channel.

5. The liquid-free quick-connect connector according to claim 4, characterized in that, The axis of the upper air inlet is inclined toward the direction of the lower air inlet.

6. The liquid-free quick-connect connector according to claim 1, characterized in that, The connector body includes a connector housing and a pneumatic locking device disposed within the connector housing.

7. The liquid-free quick-connect connector according to claim 6, characterized in that, The pneumatic locking device includes an expansion sealing ring and a pneumatic piston that slides within the connector housing; The pneumatic piston has a piston channel extending through its length, the connector housing has a pneumatic locking port communicating with the pneumatic piston, and the expansion sealing ring is located at the end of the pneumatic piston away from the pneumatic locking port.

8. The liquid-free quick-connect connector according to claim 7, characterized in that, The connector housing is provided with a first mounting channel, a second mounting channel and a third mounting channel with gradually increasing diameter along the axial direction; The pneumatic piston includes a first piston section that mates with the second mounting channel and a second piston section that mates with the third mounting channel; The outer wall of the first piston section is provided with a first annular groove, and a first gas seal ring is provided in the first annular groove; the first gas seal ring is sealed to the side wall of the second mounting channel. The outer wall of the second piston section is provided with a second annular groove, and a second gas seal ring is provided in the second annular groove; the second gas seal ring is sealed to the side wall of the third mounting channel. The pneumatic locking port is connected to the third mounting channel at a position close to the second mounting channel.

9. The liquid-free quick-connect connector according to claim 7, characterized in that, The piston channel includes a first piston channel and a second piston channel; the diameter of the second piston channel is larger than the diameter of the first piston channel. The auxiliary suction cylinder has a reduced diameter section at one end away from the suction section, and the diameter of the reduced diameter section is smaller than the diameter of the auxiliary suction cylinder. The reduced diameter section mates with the first piston channel; the auxiliary suction cylinder mates with the second piston channel.

10. The liquid-free quick-connect connector according to claim 9, characterized in that, The outer wall of the auxiliary suction cylinder is provided with a plurality of auxiliary sealing grooves along its axial direction, and each of the plurality of auxiliary sealing grooves is provided with an auxiliary sealing ring.

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