Split type valve core for automobile air conditioning refrigeration system

Abstract

This utility model belongs to the technical field of automotive air conditioning refrigeration system components, specifically a split-type valve core for automotive air conditioning refrigeration systems, including a valve core mechanism, a filter mechanism, and a cleaning mechanism. The valve core mechanism includes an upper core body, a lower core body threaded to the end of the upper core body, and a core rod disposed within the upper core body. The filter mechanism includes an assembly plate assembled between the upper and lower core bodies. This utility model utilizes a filter screen installed on the filter cylinder to filter the airflow passing through the upper and lower core bodies. During filtration, the fixing plate moves to the bottom of the filter cylinder along with the movement of the core rod. After filtration, the core rod returns to its original position under the action of a spring assembly, while the cleaning brush cleans the debris remaining on the inner wall of the filter screen during its upward movement. The debris then falls to the bottom of the filter cylinder, thus achieving filtration and automated cleaning. This solution significantly extends the time required for filter screen cleaning and maintenance, and is highly practical.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive air conditioning refrigeration system components, specifically a split-type valve core for automotive air conditioning refrigeration systems. Background Technology

[0002] The automotive air conditioning system is an indispensable component of modern automobiles, and its performance directly affects the comfort of the driving experience. Within this system, the expansion valve, as a core throttling element, typically contains a valve core to regulate the refrigerant flow. As the refrigerant circulates within the system, it inevitably carries solid particles such as metal shavings from component wear, impurities remaining from the assembly process, or oxides accumulated over long-term operation. If these impurities flow with the refrigerant through precision components like the expansion valve, they can cause wear, blockage, or jamming at the valve orifices, severely impacting the system's cooling efficiency, operational stability, and lifespan.

[0003] To address the aforementioned issues, existing technologies typically integrate a simple filter screen at the inlet of the expansion valve or incorporate an integrated filter structure into the valve core structure to filter the refrigerant before it enters the valve port. However, this traditional integrated design has significant shortcomings: First, there is a trade-off between filtration effectiveness and ease of maintenance. When the filter screen or filter structure is clogged with debris, it leads to a reduction in refrigerant flow and a decrease in performance. To clean these debris, it is usually necessary to remove the entire valve core from the expansion valve, and even disassemble part of the piping. This process is cumbersome, not only increasing maintenance time and costs, but also easily introducing air and moisture during disassembly and reassembly, causing secondary pollution to the refrigeration system and affecting the system vacuum and cooling effect.

[0004] Secondly, the filter structure of integrated valve cores is often relatively simple, with limited dirt-holding capacity. When a large amount of debris accumulates, it can quickly cause an increase in pressure drop, and it cannot be effectively cleaned without disassembly, leading to frequent system repairs.

[0005] Therefore, there is an urgent need in this field for an improved valve core structure for automotive air conditioning refrigeration systems. This structure should not only effectively filter impurities in the flowing gas, but more importantly, it should be able to conveniently and quickly clean the filtered impurities without disassembling the valve core or interrupting the main pipeline of the system, so as to maintain the long-term, efficient and stable operation of the system. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: A split-type valve core for an automotive air conditioning refrigeration system includes a valve core mechanism, a filter mechanism, and a cleaning mechanism. The valve core mechanism includes an upper core body, a lower core body threaded to the end of the upper core body, and a core rod disposed within the upper core body. The filter mechanism includes an assembly plate assembled between the upper and lower core bodies, a filter cylinder fixed to the bottom of the assembly plate, a filter screen installed on the upper part of the filter cylinder, and a guide cylinder disposed inside the filter cylinder. The cleaning mechanism includes a fixing plate fixed to the core rod, a through hole two formed on the fixing plate, and a cleaning brush fixed to the outside of the fixing plate.

[0008] In a preferred embodiment, the present invention can be further configured such that the valve core mechanism further includes a limiting block fixed to the core rod, a spring assembly disposed below the limiting block, a base fixed to the bottom end of the core rod, a sealing gasket assembled above the base, a sealing block disposed above the sealing gasket, and a sealing ring assembled in the middle of the upper core body.

[0009] In a preferred embodiment, the present invention can be further configured such that the spring assembly includes two sets disposed on the upper and lower sides of the filter mechanism, and the bottom end of the lower spring assembly is fixed to the positioning plate.

[0010] In a preferred embodiment, the present invention can be further configured such that a positioning ring for fixing the spring assembly is fixed on the assembly plate.

[0011] In a preferred embodiment, the present invention can be further configured such that: a through hole is provided at the bottom of the filter cylinder, and a waste bag is connected below the through hole.

[0012] In a preferred embodiment, the present invention can be further configured such that an outer protective sleeve located outside the fixing plate is mounted on the assembly plate.

[0013] The above-mentioned technical solution of this utility model has the following beneficial technical effects: 1. This utility model utilizes a filter screen installed on the filter cylinder to filter the airflow passing through the upper and lower core bodies. During filtration, the fixing plate moves to the bottom of the filter cylinder along with the movement of the core rod. After filtration, the core rod returns to its original position under the action of the spring assembly, while the cleaning brush cleans the debris remaining on the inner wall of the filter screen as it moves upward. The debris then falls to the bottom of the filter cylinder, thus achieving filtration and automated cleaning. This solution greatly extends the time required for cleaning and maintaining the filter screen and has high practicality.

[0014] 2. This utility model uses two sets of springs to share the wear and tear during long-term use, thereby improving the overall service life. Furthermore, even if one set of springs is damaged, the basic functions of the valve body are still maintained, making the design quite reasonable. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the split-type valve core for the automotive air conditioning refrigeration system of this utility model; Figure 2 This is an enlarged view of part A of the split-type valve core used in the automotive air conditioning refrigeration system of this utility model; Figure 3 This is a schematic diagram of the fixing plate structure of this utility model.

[0016] Figure label: 10. Valve core mechanism; 11. Upper core body; 12. Lower core body; 13. Core rod; 14. Limit block; 15. Spring assembly; 151. Positioning plate; 16. Base; 17. Sealing gasket; 18. Sealing block; 19. Sealing ring; 20. Filtering mechanism; 21. Assembly plate; 22. Filter cylinder; 23. Filter screen; 24. Guide cylinder; 25. Positioning ring; 26. Waste bag; 27. Through hole one; 30. Cleaning mechanism; 31. Fixing plate; 32. Through hole two; 33. Cleaning brush; 34. Outer protective sleeve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0018] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0019] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a split-type valve core for an automotive air conditioning refrigeration system.

[0020] Combination Figures 1-3 As shown, the present invention provides a split valve core for an automotive air conditioning refrigeration system, comprising a valve core mechanism 10, a filter mechanism 20, and a cleaning mechanism 30.

[0021] The valve core mechanism 10 includes an upper core body 11, a lower core body 12 threaded to the end of the upper core body 11, and a core rod 13 disposed within the upper core body 11. The valve core mechanism 10 also includes a limiting block 14 fixed to the core rod 13, a spring assembly 15 disposed below the limiting block 14, a base 16 fixed to the bottom end of the core rod 13, a sealing gasket 17 mounted above the base 16, a sealing block 18 disposed above the sealing gasket 17, and a sealing ring 19 mounted in the middle of the upper core body 11. External airflow flows from above the upper core body 11 to the lower core body 12, using the airflow to push open the sealing block 18, which, in conjunction with the spring assembly 15, completes the on / off switching, thus realizing the switch control.

[0022] The filtration mechanism 20 includes an assembly plate 21 assembled between the upper core 11 and the lower core 12, a filter cylinder 22 fixed to the bottom of the assembly plate 21, a filter screen 23 installed on the upper part of the filter cylinder 22, and a guide cylinder 24 disposed inside the filter cylinder 22. The cleaning mechanism 30 includes a fixing plate 31 fixed to the core rod 13, a through hole 32 opened on the fixing plate 31, and a cleaning brush 33 fixed to the outside of the fixing plate 31. The filter screen 23 installed on the filter cylinder 22 can be used to filter the airflow flowing through the upper core 11 and the lower core 12. During filtration, the fixing plate 31 moves to the bottom of the filter cylinder 22 with the movement of the core rod 13. After filtration, the core rod 13 is reset under the action of the spring assembly 15, while the cleaning brush 33 cleans the debris remaining on the inner wall of the filter screen 23 during the upward movement. The debris then falls to the bottom of the filter cylinder 22, thus realizing filtration and automated cleaning.

[0023] Furthermore, the spring assembly 15 includes two sets disposed on the upper and lower sides of the filter mechanism 20, and the bottom end of the lower spring assembly 15 is fixed to the positioning plate 151. Through the two sets of spring assemblies 15, the wear and tear on itself can be shared during long-term use, thereby improving the overall service life. Moreover, even if a single spring assembly 15 is damaged, the basic function of the valve body is still properly maintained, which is a reasonable design.

[0024] Specifically, a positioning ring 25 is fixed on the assembly plate 21 to fix the spring assembly 15. Both the positioning ring 25 and the positioning plate 151 can improve the stability of the spring assembly 15, thereby ensuring the smooth operation of the valve body.

[0025] Furthermore, the bottom of the filter cartridge 22 is connected to a through hole 27, and a waste bag 26 is connected below the through hole 27. The waste bag 26 can further increase the amount of impurities stored. Moreover, the waste bag 26 adopts a soft bag structure, so even if it comes into contact with the lower core 12 or the spring assembly 15, it will not affect normal operation, thereby extending the maintenance cycle and making it highly practical.

[0026] Furthermore, an outer protective sleeve 34 is installed on the assembly plate 21 outside the fixed plate 31, which can prevent the debris carried by the fixed plate 31 from being lost to the side during the upward movement, thereby ensuring that the debris falls into the filter cylinder 22 later.

[0027] The working principle and usage process of this utility model are as follows: First, the filter screen 23 installed on the filter cylinder 22 filters the airflow passing through the upper core 11 and the lower core 12. During filtration, the fixing plate 31 moves to the bottom of the filter cylinder 22 along with the movement of the core rod 13. After filtration, the core rod 13 is reset under the action of the spring assembly 15, while the cleaning brush 33 cleans the debris remaining on the inner wall of the filter screen 23 during its upward movement. The debris then falls to the bottom of the filter cylinder 22, thus achieving filtration and automated cleaning.

[0028] The terms "fixed," "installed," "connected," "set," "open," "equipped with," "embedded," and "assembled" used in this specification to describe the position or relationship of components all indicate conventional physical connections or spatial configurations that can be understood and implemented by those skilled in the art based on the function of the relevant components, the context, and common knowledge. These relationships encompass, but are not limited to, specific forms such as welding, bonding, threaded fastening, snap-fit, interference fit, plug-in, sliding fit, hinge, integral molding, adjacent arrangement, and opening or slot accommodating. Their purpose is to clearly describe the relative position, fitting method, and functional implementation path between components, rather than limiting a single specific structural detail. To ensure a smooth and concise reading experience and ease of understanding, no separate explanation is provided after each term.

[0029] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A split-type valve core for an automotive air conditioning refrigeration system, characterized in that, It includes a valve core mechanism (10), a filter mechanism (20), and a cleaning mechanism (30); The valve core mechanism (10) includes an upper core body (11), a lower core body (12) threaded to the end of the upper core body (11), and a core rod (13) disposed in the upper core body (11). The filtration mechanism (20) includes an assembly plate (21) assembled between the upper core (11) and the lower core (12), a filter cylinder (22) fixed to the bottom of the assembly plate (21), a filter screen (23) installed on the upper part of the filter cylinder (22), and a guide cylinder (24) disposed inside the filter cylinder (22). The cleaning mechanism (30) includes a fixing plate (31) fixed to the core rod (13), a through hole (32) opened on the fixing plate (31), and a cleaning brush (33) fixed to the outside of the fixing plate (31).

2. The split-type valve core for an automotive air conditioning refrigeration system according to claim 1, characterized in that, The valve core mechanism (10) further includes a limiting block (14) fixed on the core rod (13), a spring assembly (15) disposed below the limiting block (14), a base (16) fixed to the bottom end of the core rod (13), a sealing gasket (17) assembled above the base (16), a sealing block (18) disposed above the sealing gasket (17), and a sealing ring (19) assembled in the middle of the upper core body (11).

3. The split valve core of claim 2, wherein the valve core is made of a material having a hardness of 60 to 80 on the Rockwell scale A. The spring assembly (15) includes two sets disposed on the upper and lower sides of the filter mechanism (20), and the bottom end of the lower spring assembly (15) is fixed to the positioning plate (151).

4. A split-type valve core for an automotive air conditioning refrigeration system according to claim 2, characterized in that, The mounting plate (21) is fixed with a positioning ring (25) for fixing the spring assembly (15).

5. The split valve core for use in a vehicle air conditioning refrigeration system of claim 1, wherein The bottom of the filter cylinder (22) is connected to a through hole (27), and a waste bag (26) is connected below the through hole (27).

6. A split-type valve core for an automotive air conditioning refrigeration system according to claim 1, characterized in that, An outer protective sleeve (34) located outside the fixed plate (31) is installed on the assembly plate (21).

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