A split type automobile air conditioning filling valve core

Abstract

The present invention relates to the technical field of filling valve cores, specifically to a split type automobile air-conditioning filling valve core, a valve seat, a main valve core and a valve head group, the top surface of the valve seat is threadedly connected to sleeves located on both sides of the main valve core, and the top end of the sleeve is threadedly connected to a joint; through the unique design inside the valve core, including the cooperation of a one-way air inlet valve, a one-way air exhaust valve and a plug, it is possible to achieve self-locking and blocking of the channel in the initial state, effectively preventing the refrigerant from leaking when it is not fully connected, thereby improving the safety and sealing of the system; and when filling the refrigerant, the mutual cooperation between the reversing column and the reversing disk causes the reversing disk to deflect, effectively opening or closing the flow channel, preventing the refrigerant from leaking when it is not fully connected, thereby ensuring the safety of the filling process, and adopting a split structure design, through the threaded connection of the sleeve, the valve seat and the joint, the valve core can be quickly disassembled, assembled and maintained, which is convenient for replacing parts, simplifies installation and maintenance operations, and significantly improves work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of filling valve cores, in particular to a split-type automobile air-conditioning filling valve core. Background Art

[0002] In the prior art, the refrigerant filling valve core of the automobile air conditioning system usually has problems such as insufficient sealing, inconvenient operation, and easy leakage during the refrigerant filling process. The traditional filling valve core design often causes the refrigerant to leak from the valve core when the refrigerant is not fully connected or the filling device is not fully in place, which not only causes refrigerant loss, but also may cause abnormal pressure in the system, affecting the normal operation of the refrigeration system. In addition, the existing valve core design is mostly an integral structure, which is inconvenient to disassemble and assemble, and the operation of maintenance and replacement of parts is complicated and inefficient.

[0003] During the refrigerant release process, some valve core designs in the prior art fail to effectively prevent the entry of external air. When negative pressure is generated inside the system, external air may be sucked into the system, affecting the purity of the refrigerant and even damaging the performance of the refrigeration system. The valve cores in the prior art lack effective self-locking and blocking designs during the filling and release process, making it difficult to ensure the sealing of the system under different operating conditions.

[0004] Based on the above problems, it is difficult for the existing refrigerant filling system to achieve efficient and safe refrigerant filling and discharge operations while ensuring sealing. Therefore, there is an urgent need for a filling valve core design that can improve sealing, facilitate operation and prevent refrigerant leakage, so as to improve the stability and efficiency of the system. Summary of the invention

[0005] The present invention provides a split-type automobile air conditioning filling valve core, which aims to solve the problems of poor sealing, refrigerant leakage, inconvenient maintenance, etc. in the prior art. By adopting a split structure design and a one-way valve core, the present invention effectively improves the safety, sealing and convenience of refrigerant filling, and is suitable for a variety of automobile air conditioning systems.

[0006] A split-type automobile air-conditioning filling valve core comprises: a valve seat, a main valve core and a valve head group, wherein the top surface of the valve seat is threadedly connected to sleeve plates located on both sides of the main valve core, and the top end of the sleeve plate is threadedly connected to a joint;

[0007] The main valve core includes an upper valve cylinder, a lower valve cylinder, a reversing disc, a guide gear shaft and a reversing column located on the inner side of the upper valve cylinder. The bottom surface of the upper valve cylinder is connected to the top surface of the lower valve cylinder, and the surfaces of the upper valve cylinder and the lower valve cylinder are provided with a plurality of first air holes and second air holes that are connected in a one-to-one correspondence; the surface of the reversing disc is provided with a one-way air intake valve, a one-way air exhaust valve and a plug that are used to communicate with the first air holes, and the one-way air intake valve and the one-way air exhaust valve are respectively located on both sides of the plug; the guide gear shaft is rotatably installed on the inner side of the upper valve cylinder and the lower valve cylinder, and the surface of the guide gear shaft is provided with a guide gear that is meshed with the inner side of the reversing disc;

[0008] The valve head group includes a touch rod and a spring. The touch rod passes through the upper valve cylinder and is fixedly connected to the top surface of the reversing column. The spring is sleeved on the outer side of the touch rod, and the upper and lower ends are respectively in contact with the surface of the touch rod and the top surface of the upper valve cylinder. The top surface of the touch rod is fixedly connected with a lifting ear.

[0009] Preferably, the surfaces of the upper valve cylinder and the lower valve cylinder are provided with pressure rings respectively located on the outer edge of the top surface of the upper valve cylinder, and a pressure ring located on the outer edge of the bottom surface of the lower valve cylinder, the inner sides of the valve seat and the joint are provided with threads for connecting with the joint, and the upper and lower ends of the sleeve are respectively abutted against the pressure rings on the surfaces of the upper valve cylinder and the lower valve cylinder.

[0010] Preferably, the surface of the reversing column is provided with a first guide groove and a second guide groove connected to each other, the first guide groove and the second guide groove are arranged obliquely and have opposite inclination directions, and the inner side of the reversing disk is provided with a contact pin that slides and abuts against the inner sides of the first guide groove and the second guide groove.

[0011] Preferably, the valve head assembly further comprises a buffer pad fixedly connected to the top surface of the spring, wherein the buffer pad is used to relieve the impact force between the touch rod and the reversing column after the filling is completed, thereby improving the durability of the valve body.

[0012] Preferably, the first air holes and the second air holes are in a plurality of groups and are evenly distributed in the circumferential direction, and the connection points of the first air holes and the second air holes are located in the same horizontal plane as the commutator disc.

[0013] Preferably, the one-way air intake valve and the one-way exhaust valve have the same structure and are both used for one-way flow guidance and reverse blocking. The one-way air intake valve and the one-way exhaust valve are arranged in reverse directions and are equidistant from the central angles of the two sides of the plug.

[0014] Preferably, the number of the one-way air intake valve, the one-way air exhaust valve and the plug is multiple groups, and is the same as the number of the first air holes.

[0015] Preferably, a flow meter and a hydraulic sensor are also provided on the inner side of the valve seat, the flow meter is used to monitor the flow through the filling valve in real time, and the hydraulic sensor is used to monitor the pressure state of the refrigerant when it enters the system to ensure stability and safety during the filling process.

[0016] Preferably, a limiting groove for positioning and fixing the guide gear shaft is provided on the surface of the commutator plate, and the limiting groove limits the axial displacement of the guide gear shaft by engaging with the inner side of the guide gear shaft, thereby ensuring stable transmission during the filling process.

[0017] Preferably, the top end of the touch rod is provided with a cap head abutting against the top surface of the spring, the bottom end of the spring abuts against the top surface of the upper valve cylinder, and the spring is in a non-compressed state, and the top surface of the upper valve cylinder is provided with a column hole for sleeved on the surface of the touch rod.

[0018] In a possible embodiment, the present invention provides a split-type automobile air-conditioning filling valve core, comprising: a valve seat, a main valve core and a valve head group, wherein the top surface of the valve seat is threadedly connected to a sleeve plate located on both sides of the main valve core, and the top end of the sleeve plate is threadedly connected to a connector, and through these threaded connections, a tight connection between the main valve core and the valve seat is ensured, thereby achieving a stable installation of the filling valve core.

[0019] The main valve core includes: an upper valve cylinder, a lower valve cylinder, a reversing plate, a guide gear shaft and a reversing column, wherein the bottom surface of the upper valve cylinder is connected to the top surface of the lower valve cylinder, and the surfaces of the upper valve cylinder and the lower valve cylinder are respectively provided with a plurality of first air holes and second air holes that are connected one by one. The function of these air holes is to guide the flow of the refrigerant and control the filling and discharge process.

[0020] The surface of the reversing disc is provided with a one-way air intake valve, a one-way air exhaust valve and a plug connected to the first air hole, wherein the one-way air intake valve and the one-way air exhaust valve are respectively located on both sides of the plug to realize the one-way refrigerant introduction and discharge functions, and prevent the refrigerant from leaking when the connection is not complete. The guide gear shaft is rotatably installed on the inner side of the upper valve cylinder and the lower valve cylinder, and the surface is provided with a guide gear meshing with the inner side of the reversing disc to ensure that the reversing disc can rotate smoothly during the filling and discharging process.

[0021] The valve head group includes: a touch rod and a spring, wherein the touch rod passes through the upper valve cylinder and is fixedly connected to the top surface of the reversing column. The spring is sleeved on the outside of the touch rod, and the upper and lower ends are respectively in contact with the surface of the touch rod and the top surface of the upper valve cylinder. A lifting ear is fixedly connected to the top surface of the touch rod, which is used to apply external force during the filling or discharging process to drive the reversing column to move up and down.

[0022] The surface of the reversing column is provided with a first guide groove and a second guide groove connected to each other, and the two are arranged obliquely with opposite inclination directions. The inner side of the reversing disc is provided with a contact pin that slides against the inner side of the first guide groove and the second guide groove. Through the cooperation of the contact pin and the oblique groove, the rotation of the reversing disc is realized to control the filling and discharge of the refrigerant.

[0023] Based on the above technical solution, the present invention realizes the one-way filling and discharge process of the refrigerant through a clever structural design. During filling, the contact rod is moved downward by applying external force, driving the reversing column downward, causing the reversing disk to deflect, thereby opening the air hole channel and allowing the refrigerant to enter the system through the one-way air inlet valve; after the filling is completed, the spring elastically resets, driving the reversing column upward, causing the reversing disk to reset and close the channel to prevent refrigerant leakage. During the discharge process, the contact rod is pulled by external force to cause the reversing disk to deflect in the opposite direction, opening the one-way exhaust valve, realizing one-way discharge of the refrigerant, and avoiding negative pressure and air entry in the system.

[0024] The split design of the present invention enables the valve seat, sleeve plate and joint to be quickly disassembled and assembled, which is convenient for maintenance and replacement. At the same time, the charging efficiency and safety of the automobile air-conditioning system are improved by accurately controlling the introduction and discharge of the refrigerant.

[0025] The beneficial effects achieved by the present invention are:

[0026] 1. In the present invention, through the unique design inside the valve core, including the cooperation of the one-way air inlet valve, the one-way air exhaust valve and the plug, the self-locking sealing of the channel can be achieved in the initial state, effectively preventing the refrigerant from leaking when it is not fully connected, thereby improving the safety and sealing of the system, and when filling the refrigerant, the mutual cooperation between the reversing column and the reversing disk causes the reversing disk to deflect, effectively opening or closing the flow channel, preventing the refrigerant from leaking when it is not fully connected, and ensuring the safety of the filling process.

[0027] 2. In the present invention, a split structural design is adopted, and through the threaded connection of the sleeve plate, valve seat and joint, the valve core can be quickly disassembled, assembled and maintained, which is convenient for replacing parts, simplifies installation and maintenance operations, and significantly improves work efficiency.

[0028] 3. In the present invention, through structural design, when the refrigerant needs to be released, only the refrigerant is allowed to overflow without introducing external air, thereby preventing gas from entering the refrigeration system due to negative pressure, ensuring the sealing and operational stability of the system. When filling the refrigerant, the mutual cooperation between the reversing column and the reversing disc causes the reversing disc to deflect, effectively opening or closing the flow channel, preventing the refrigerant from leaking in the case of incomplete connection, and ensuring the safety of the filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the exploded structure of a valve seat and a main valve core according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the exploded structure of the main valve core according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a reversing column, a reversing disc and a guide gear shaft according to an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of a reversing column and a reversing disc according to an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the surface structure of a commutator disc according to an embodiment of the present invention;

[0035] Figure 7 The figure is a schematic diagram of the internal structure of a one-way air intake valve according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 100, valve seat; 110, sleeve plate; 120, joint;

[0038] 200, main valve core; 210, upper valve cylinder; 220, lower valve cylinder; 230, reversing plate; 240, guide gear shaft; 250, reversing column; 211, first air hole; 221, second air hole; 231, one-way air inlet valve; 232, one-way air exhaust valve; 233, plug; 234, contact pin; 251, first guide groove; 252, second guide groove;

[0039] 300, valve head assembly; 310, touch rod; 320, spring; 311, lifting ear. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0041] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0042] A split-type automobile air-conditioning filling valve core provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] Combination Figures 1 to 7 As shown, a split-type automobile air-conditioning filling valve core provided by the present invention includes: a valve seat 100, a main valve core 200 and a valve head group 300.

[0045] The top surface of the valve seat 100 is threadedly connected to the sleeve plates 110 located on both sides of the main valve core 200, and the top of the sleeve plates 110 is threadedly connected to the connector 120. The main valve core 200 is installed inside the valve seat 100, and the sleeve plates 110 and the connector 120 are combined to achieve quick disassembly and fixing of the main valve core 200.

[0046] The main valve core 200 includes an upper valve cylinder 210, a lower valve cylinder 220, a reversing plate 230, a guide gear shaft 240 and a reversing column 250. The bottom surface of the upper valve cylinder 210 is connected to the top surface of the lower valve cylinder 220, and the surfaces of the upper valve cylinder 210 and the lower valve cylinder 220 are respectively provided with a plurality of first air holes 211 and second air holes 221 that are connected in a one-to-one correspondence. The reversing plate 230 is installed between the upper valve cylinder 210 and the lower valve cylinder 220, and realizes rotation transmission through the guide gear shaft 240.

[0047] The surface of the reversing disc 230 is provided with a one-way air intake valve 231, a one-way air exhaust valve 232 and a plug 233 for communicating with the first air hole 211, wherein the one-way air intake valve 231 and the one-way air exhaust valve 232 are respectively located on both sides of the plug 233, playing the role of one-way flow guidance and blocking. The guide gear shaft 240 is rotatably installed on the inner side of the upper valve cylinder 210 and the lower valve cylinder 220, and the surface of the guide gear shaft 240 is provided with a guide gear meshing with the inner side of the reversing disc 230, ensuring that the reversing disc 230 can achieve stable rotation under the drive of the guide gear shaft 240.

[0048] The valve head group 300 includes a touch rod 310 and a spring 320, wherein the touch rod 310 passes through the upper valve cylinder 210 and is fixedly connected to the top surface of the reversing column 250, and the spring 320 is sleeved on the outside of the touch rod 310, and the upper and lower ends are respectively in contact with the surface of the touch rod 310 and the top surface of the upper valve cylinder 210, ensuring that the touch rod 310 can drive the reversing column 250 to move up and down when external force is applied.

[0049] In the initial state, the spring 320 maintains an elastically stretched state, so that the contact pin 234 is located between the connection points of the first guide groove 251 and the second guide groove 252, ensuring that the plug 233 blocks the passage between the first air hole 211 and the second air hole 221, thereby sealing the air hole passage.

[0050] During the charging process, the joint 120 is connected through the charging device, and an external force is applied to compress the spring 320, so that the touch rod 310 pushes the reversing column 250 downward. In this process, the reversing disc 230 is deflected under the action of the first guide groove 251 and the second guide groove 252, so that the one-way air inlet valve 231 is connected with the first air hole 211 and the second air hole 221, and the air hole channel is opened to realize the one-way charging of the refrigerant.

[0051] When the refrigerant is filled, the external force is removed, and the spring 320 drives the reversing column 250 to reset upward through elastic recovery, and the reversing disk 230 is also reset accordingly, and the passage between the first air hole 211 and the second air hole 221 is blocked by the plug 233 again, completing the re-blocking of the air hole to ensure the sealing of the system.

[0052] When releasing the refrigerant, the lifting ear 311 is clamped by a special tool to pull the contact rod 310 outward, so that the reversing column 250 and the guide gear shaft 240 move upward relative to each other, driving the reversing disk 230 to deflect in the opposite direction, so that the one-way exhaust valve 232 is located at the connection point of the first air hole 211 and the second air hole 221, opening the exhaust channel of the refrigerant and allowing the refrigerant to overflow from the system.

[0053] The split design of the present invention realizes the rapid disassembly and assembly of the main valve core 200 through the threaded connection of the valve seat 100, the sleeve plate 110 and the joint 120, which is convenient for maintenance and replacement; at the same time, through the cooperation of the one-way air inlet valve 231, the one-way air exhaust valve 232 and the plug 233, the one-way flow guidance and channel sealing of the refrigerant are realized, ensuring the safety and sealing of the filling process.

[0054] Embodiment 2:

[0055] In another specific embodiment of the present invention, an improved split-type automobile air-conditioning charging valve core is provided, which is mainly optimized and improved in the following parts:

[0056] The split automobile air conditioner filling valve core of this embodiment still includes: valve seat 100, main valve core 200 and valve head assembly 300. Compared with embodiment 1, this embodiment introduces additional monitoring devices and structural optimization to further improve the accuracy and safety of the filling process.

[0057] First, a flow meter and a hydraulic sensor are also provided inside the valve seat 100 to monitor the flow and pressure of the refrigerant in real time. The flow meter is used to detect the flow of the refrigerant through the valve core, while the hydraulic sensor is used to monitor the pressure of the refrigerant when it enters the system. These monitoring devices can ensure accurate control of the refrigerant filling process, avoid overfilling or underfilling of the refrigerant, and prevent system failures caused by abnormal pressure.

[0058] In this embodiment, a limiting groove is added to the surface of the commutation disc 230 to more accurately position and fix the guide gear shaft 240. The limiting groove is engaged with the inner side of the guide gear shaft 240, effectively limiting the axial displacement of the guide gear shaft 240, ensuring the rotation stability of the commutation disc 230 during the filling process, thereby ensuring the stability and reliability of the system operation.

[0059] In addition, a buffer pad is added to the valve head assembly 300 of this embodiment, and the buffer pad is fixed to the top surface of the spring 320 and is located between the touch rod 310 and the reversing column 250. After the refrigerant is filled, the buffer pad is used to relieve the impact force between the touch rod 310 and the reversing column 250, reducing mechanical fatigue and damage, and further extending the service life of the valve core.

[0060] During operation, when the refrigerant filling device is connected to the connector 120, the real-time monitoring device will detect the refrigerant flow and pressure to ensure the stability of the filling process. When the external force compresses the spring 320, the reversing column 250 moves downward, driving the reversing disk 230 to rotate and deflect, and the refrigerant enters the system through the one-way air inlet valve 231. After the filling is completed, the buffer pad protects the key components of the valve core by absorbing the rebound force, ensuring long-term reliable operation.

[0061] In general, Example 2 improves the operating accuracy, safety and durability of the filling valve core by introducing flow monitoring and hydraulic monitoring devices and adding limit grooves and buffer pads, making it more suitable for complex or high-demand automobile air-conditioning filling scenarios.

[0062] The working principle and use process of the present invention:

[0063] Working principle:

[0064] Initial state:

[0065] When no operation is performed, the valve core is in the initial state, the spring 320 is in the original length state, and the reversing disc 230 and the reversing column 250 are in the initial position. Specifically, the contact pin 234 is located between the connection point of the first guide groove 251 and the second guide groove 252, and the plug 233 is located at the connection point of the first air hole 211 and the second air hole 221, blocking the passage between the two air holes, realizing the self-locking and blocking function of the valve body. In this state, the refrigerant cannot flow through the valve body, thereby ensuring the safety and sealing of the system and preventing any refrigerant leakage.

[0066] Inflation process:

[0067] When the automobile air conditioning system needs to be charged with refrigerant, the charging device is connected to the connector 120. When an external force is applied, the pressure of the charging device causes the contact rod 310 and the lifting ear 311 to move downward, compressing the spring 320 and driving the reversing column 250 to move downward along the inside of the upper valve cylinder 210 and the lower valve cylinder 220. As the reversing column 250 moves downward, the obliquely arranged first guide groove 251 interacts with the contact pin 234, forcing the reversing disk 230 to deflect around the guide gear shaft 240.

[0068] During the rotation and deflection of the reversing disc 230, the one-way air inlet valve 231 gradually moves to the connection point between the first air hole 211 and the second air hole 221, and opens the air hole channel. At this time, the refrigerant enters the valve core through the filling device and enters the system through the one-way air inlet valve 231, realizing the one-way filling of the refrigerant. Since the one-way exhaust valve 232 and the plug 233 are in the blocking position, any refrigerant leakage is prevented.

[0069] Reset after charging is complete:

[0070] When the refrigerant is filled and the external force is removed, the spring 320 returns to its original length, and the reversing column 250 moves upward and resets. At this time, the reversing disk 230 rotates in the opposite direction under the action of the second guide groove 252, and the plug 233 moves back to between the first air hole 211 and the second air hole 221 to close the air hole channel. In this way, the entire filling channel is blocked again to prevent refrigerant leakage, completing the automatic blocking and self-locking operation of the refrigerant filling process.

[0071] Refrigerant release process:

[0072] When the refrigerant in the system needs to be released, a special tool is used to clamp the lifting ear 311 and pull the contact rod 310 outward. At this time, the contact rod 310 drives the reversing column 250 and the guide gear shaft 240 to move upward relative to each other. Under the action of the second guide groove 252, the contact pin 234 guides the reversing disk 230 to deflect in the opposite direction, and the one-way exhaust valve 232 moves to the connection point between the first air hole 211 and the second air hole 221, opening the air hole channel, allowing the refrigerant to be discharged from the system in one direction. Through this design, it is ensured that the refrigerant only overflows from the valve body in one direction, preventing external air from entering the refrigerant pipeline due to the negative pressure of the system, and ensuring the sealing of the system and the purity of the refrigerant.

[0073] Usage process:

[0074] Connect the charging equipment:

[0075] Before starting to charge the refrigerant, first connect the refrigerant charging device to the connector 120 to ensure that the connection is tight and press against the top surface of the contact rod 310 and the lifting ear 311 to prepare for the charging operation.

[0076] Start charging refrigerant:

[0077] The charging device applies external force to move the touch rod 310 downward, compress the spring 320, and drive the reversing column 250 and the reversing disk 230 to move. At this time, the reversing disk 230 begins to deflect, the one-way air inlet valve 231 opens the air hole channel, and the refrigerant begins to enter the system.

[0078] Monitoring the filling process:

[0079] During the filling process, the flow meter and hydraulic sensor disposed inside the valve seat 100 monitor the flow and pressure of the refrigerant in real time to ensure the accuracy of the refrigerant filling and avoid over- or under-filling. During the filling process, the one-way air inlet valve 231 ensures that the refrigerant can only enter the system in one direction to prevent refrigerant leakage.

[0080] Reset after filling is complete:

[0081] When the refrigerant is filled and the external force is removed, the spring 320 returns to its original length, driving the reversing column 250 and the reversing disk 230 to reset, and the plug 233 blocks the air hole channel again to achieve automatic sealing, ensuring that the system is sealed and leak-free.

[0082] Refrigerant release:

[0083] When the refrigerant needs to be discharged, a special tool is used to clamp the lifting ear 311 and pull out the contact rod 310. The reversing disc 230 is deflected in the opposite direction, the one-way exhaust valve 232 is opened, and the refrigerant is discharged smoothly from the system through the exhaust channel. In this process, the exhaust valve ensures that the refrigerant can only overflow in one direction, preventing the outside air from entering due to the negative pressure of the system.

[0084] Disassembly and maintenance:

[0085] When the valve core needs to be disassembled and maintained, the main valve core 200 can be quickly removed from the valve seat 100 by rotating the threaded sleeve 110, the joint 120 and other components, and then quickly maintained and replaced. Through the split design, users can easily disassemble and assemble the valve core, reducing the complexity and time cost of maintenance.

[0086] Summarize:

[0087] The present invention realizes the one-way filling and discharge of refrigerant by the coordinated work between the valve seat 100, the main valve core 200 and the valve head group 300, and by utilizing the design of the reversing disc 230, the reversing column 250 and the first guide groove 251 and the second guide groove 252 of the guide groove system. The split structure design makes the valve body easier to disassemble and assemble, and is convenient for maintenance and replacement. Through real-time monitoring by the flow meter and the hydraulic sensor, accurate control during the refrigerant filling process is ensured, refrigerant leakage or air intrusion is avoided, and the safety, sealing and service life of the system are improved.

[0088] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A split-type automobile air-conditioning filling valve core, characterized in that: include: A valve seat (100), a main valve core (200) and a valve head assembly (300), wherein the top surface of the valve seat (100) is threadedly connected to sleeve plates (110) located on both sides of the main valve core (200), and the top end of the sleeve plate (110) is threadedly connected to a joint (120); The main valve core (200) comprises an upper valve cylinder (210), a lower valve cylinder (220), a reversing disk (230), a guide gear shaft (240) and a reversing column (250) located inside the upper valve cylinder (210); the bottom surface of the upper valve cylinder (210) is connected to the top surface of the lower valve cylinder (220); and the surfaces of the upper valve cylinder (210) and the lower valve cylinder (220) are provided with a plurality of first air holes (211) and second air holes (221) that are connected in a one-to-one correspondence; the surface of the reversing disk (230) is provided with a one-way air intake valve (231), a one-way air exhaust valve (232) and a plug (233) that are used to communicate with the first air hole (211); the one-way air intake valve (231) is connected to the first air hole (211); and the one-way air exhaust valve (232) is connected to the first air hole (211). ) and a one-way exhaust valve (232) are respectively located on both sides of the plug (233); the guide gear shaft (240) is rotatably mounted on the inner sides of the upper valve cylinder (210) and the lower valve cylinder (220), and the surface of the guide gear shaft (240) is provided with a guide gear that is in transmission meshing with the inner side of the reversing plate (230); the surface of the reversing column (250) is provided with a first guide groove (251) and a second guide groove (252) that are connected to each other, the first guide groove (251) and the second guide groove (252) are arranged obliquely and in opposite directions, and the inner side of the reversing plate (230) is provided with a contact pin (234) that is in sliding contact with the inner sides of the first guide groove (251) and the second guide groove (252); The valve head assembly (300) comprises a touch rod (310) and a spring (320); the touch rod (310) passes through the upper valve cylinder (210) and is fixedly connected to the top surface of the reversing column (250); the spring (320) is sleeved on the outside of the touch rod (310), and the upper and lower ends are respectively in contact with the surface of the touch rod (310) and the top surface of the upper valve cylinder (210); and the top surface of the touch rod (310) is fixedly connected to a lifting ear (311).

2. A split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The surfaces of the upper valve cylinder (210) and the lower valve cylinder (220) are provided with a pressure ring located at the outer edge of the top surface of the upper valve cylinder (210), and a pressure ring located at the outer edge of the bottom surface of the lower valve cylinder (220). The inner sides of the valve seat (100) and the joint (120) are provided with threads for connecting with the joint (120). The upper and lower ends of the sleeve plate (110) are respectively in contact with the pressure rings on the surfaces of the upper valve cylinder (210) and the lower valve cylinder (220).

3. A split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The valve head assembly (300) further comprises a buffer pad fixedly connected to the top surface of the spring (320), the buffer pad being used to relieve the impact force between the touch rod (310) and the reversing column (250) after the filling is completed, thereby improving the durability of the valve body.

4. A split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The first air holes (211) and the second air holes (221) are arranged in a plurality of groups and are evenly distributed in the circumferential direction; the connection point between the first air holes (211) and the second air holes (221) and the reversing disc (230) are located in the same horizontal plane.

5. The split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The one-way air intake valve (231) and the one-way air exhaust valve (232) have the same structure and are both used for one-way flow guidance and reverse blocking. The one-way air intake valve (231) and the one-way air exhaust valve (232) are arranged in reverse directions and are at equal distances from the central angles of two sides of the plug (233).

6. A split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The number of the one-way air intake valve (231), the one-way air exhaust valve (232) and the plug (233) is multiple groups, and is the same as the number of the first air holes (211).

7. The split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: A flow meter and a hydraulic sensor are also provided on the inner side of the valve seat (100); the flow meter is used to monitor the flow through the filling valve in real time; the hydraulic sensor is used to monitor the pressure state of the refrigerant when it enters the system, so as to ensure stability and safety during the filling process.

8. The split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The surface of the reversing disc (230) is provided with a limiting groove for positioning and fixing the guide gear shaft (240); the limiting groove limits the axial displacement of the guide gear shaft (240) by meshing with the inner side of the guide gear shaft (240), thereby ensuring stable transmission during the filling process.

9. The split-type automobile air-conditioning filling valve core according to claim 1, characterized in that: The top end of the touch rod (310) is provided with a cap head that abuts against the top surface of the spring (320), the bottom end of the spring (320) abuts against the top surface of the upper valve cylinder (210), and the spring (320) is in a non-compressed state. The top surface of the upper valve cylinder (210) is provided with a column hole for sleeved on the surface of the touch rod (310).

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