Air conditioner charging valve element and charging valve

Abstract

The utility model discloses an air conditioner filling valve core and a filling valve, and belongs to the technical field of automobile air conditioner refrigerant filling equipment, the air conditioner filling valve core comprises a core body with a first end and a second end, a filling channel for communicating the first end with the second end is arranged in the core body, and a sealing surface is arranged at the position, close to the second end, of the filling channel. The inner diameter of the sealing face is gradually increased in the direction from the first end to the second end. The core rod penetrates through the filling channel, a first sealing gasket and a second sealing gasket which are distributed at intervals are arranged on the core rod, and the outer diameter of the first sealing gasket is smaller than that of the second sealing gasket; the core rod can move between a first position and a second position; the elastic piece enables the core rod to have a trend of moving towards the first position; the first sealing gasket and the second sealing gasket can be tightly attached to the sealing face at the same time to form a double-sealing structure in the sealing process, the contact area between the sealing gaskets and the sealing face is increased, the stability of the sealing performance of a product can be guaranteed in the refrigerant filling, high-pressure and vibration environment, and the situation of slow leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile air-conditioning refrigerant filling equipment, in particular to an air-conditioning filling valve core and a filling valve. Background Art

[0002] With the continuous development of the automotive industry, the performance and reliability requirements of automotive air-conditioning systems are becoming increasingly higher. As one of the key components in automotive air-conditioning systems, the performance of the automotive air-conditioning filling valve core directly affects the environmental protection requirements, sealing and safety of the automotive air-conditioning system.

[0003] At present, the existing automobile air-conditioning filling valve core has certain limitations in terms of structural design and new refrigerant leakage resistance, and cannot effectively meet the sealing performance and high-pressure resistance requirements of the air-conditioning filling valve core.

[0004] Therefore, the research and development of an air conditioning filling valve core and a filling valve that can ensure the stability of the product's sealing performance under refrigerant filling, high pressure, and vibration environments is an urgent problem to be solved at this stage. Utility Model Content

[0005] In response to the problems existing in the prior art, the utility model provides an air-conditioning filling valve core and a filling valve. The first sealing gasket and the second sealing gasket on the core rod can simultaneously fit tightly with the sealing surface to form a double sealing structure during sealing, thereby increasing the contact area between the sealing gasket and the sealing surface. The stability of the product's sealing performance can be guaranteed under refrigerant filling, high pressure, and vibration environments, thereby ensuring the effectiveness of the valve core seal and avoiding slow leakage.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] In a first aspect, the utility model provides an air conditioning filling valve core, comprising:

[0008] a core body, the core body having a first end and a second end, a filling channel in the core body connecting the first end and the second end, the filling channel having a sealing surface near the second end, the inner diameter of the sealing surface gradually increasing in a direction from the first end to the second end;

[0009] A core rod is arranged to pass through the filling channel, and the core rod is provided with a first sealing pad and a second sealing pad which are spaced apart in the direction from the first end to the second end, and the outer diameter of the first sealing pad is smaller than that of the second sealing pad; the core rod is movable between a first position and a second position; in the first position, the first sealing pad and the second sealing pad are both in abutment with the sealing surface, and the filling channel is in a closed state; in the second position, the first sealing pad and the second sealing pad are both separated from the sealing surface, and the filling channel is in an open state;

[0010] An elastic member is arranged between the core rod and the core body, and the elastic member causes the core rod to have a tendency to move to the first position.

[0011] As a preferred technical solution, a first placement groove is arranged on the core rod at a position corresponding to the first sealing pad, and part of the first sealing pad is embedded in the first placement groove; a second placement groove is arranged on the core rod at a position corresponding to the second sealing pad, and part of the second sealing pad is embedded in the second placement groove.

[0012] As a preferred technical solution, a spacing boss is arranged on the core rod at a position between the first sealing pad and the second sealing pad, and the outer diameter of the spacing boss is greater than that of the first sealing pad; when the core rod is in the first position, a gap is formed between the spacing boss and the sealing surface.

[0013] As a preferred technical solution, a limiting boss is arranged on the second placement groove at a position corresponding to the outer edge of the second sealing pad.

[0014] As a preferred technical solution, the sealing surface is a conical surface.

[0015] As a preferred technical solution, the angle of the sealing surface is 24-26°, and the sizes of the first sealing pad and the second sealing pad are matched with the sealing surface.

[0016] As a preferred technical solution, the outer diameter of the first sealing pad is 3.15-3.45 mm;

[0017] and / or, the outer diameter of the second sealing pad is 4-4.6 mm;

[0018] and / or, the materials of the first sealing pad and the second sealing pad are both rubber;

[0019] and / or, the cross sections of the first sealing pad and the second sealing pad are both rectangular or circular.

[0020] As a preferred technical scheme, one end of the core rod protrudes from the first end and has a limiting surface, the elastic member is located outside the core body, one end of the elastic member abuts against the limiting surface, the other end of the elastic member abuts against the end surface of the first end, and the elastic member is in a compressed state.

[0021] And / or, the elastic member is a spring, and the spring is sleeved on the core rod.

[0022] In the second aspect, the utility model provides a kind of filling valve, including valve body and the air conditioner filling valve core of preceding one, the core body is fixed in the valve body.

[0023] As a preferred technical scheme, the core body has external threads, the valve body has internal threads matching the external threads, and the core body is threadedly connected with the valve body.

[0024] And / or, a sealing ring is embedded between the core body and the valve body.

[0025] The utility model has the advantages of:

[0026] 1. The core rod has first and second sealing pads with different outer diameters, which can be tightly attached to the sealing surface simultaneously to form a double-sealing structure during sealing, thereby increasing the contact area and friction between the sealing pads and the sealing surface, ensuring the stability of the product sealing performance in a refrigerant filling, high-pressure and vibration environment, and ensuring the effectiveness of the valve core sealing to avoid slow leakage.

[0027] 2. The first and second sealing pads are embedded in the first and second placement grooves respectively, which can achieve preliminary positioning. Meanwhile, the spacer boss can separate the first and second sealing pads to prevent them from directly affecting each other when being pressed, thereby affecting the sealing performance. Further, the spacer boss and the limiting boss can provide limiting protection when the sealing pad is compressed, preventing the high-pressure rubber deformation rate from being effectively controlled, effectively improving the reliability of the valve core sealing. In addition, during refrigerant filling, the spacer boss can effectively hold the first sealing pad, and the limiting boss can prevent the second sealing pad from being blown over or out, thereby ensuring the effectiveness and safety of the valve core sealing. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a whole structure schematic view of one embodiment of the utility model air conditioner filling valve core;

[0029] Figure 2 It is Figure 1 An enlarged view of area A in the middle;

[0030] Figure 3Structure schematic view of the core rod in the second position in Figure 1 ;

[0031] Figure 4 Structure schematic view of the core rod in the second position in Figure 3 ;

[0032] Figure 5 Structure schematic view of the whole structure of one embodiment of the filling valve.

[0033] In the figure: 1-core body, 11-first end, 12-second end, 13-filling channel, 14-sealing surface, 15-external thread, 2-core rod, 21-first placing groove, 22-second placing groove, 23-interval boss, 24-limit boss, 25-limit surface, 3-first sealing gasket, 4-second sealing gasket, 5-elastic member, 6-valve body, 61-internal thread, 7-sealing ring. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in combination with the drawings.

[0035] Firstly, please refer to Figures 1-4 , one embodiment of the air conditioner filling valve core provided by the utility model, including core body 1, core body 1 has first end 11 and second end 12, and core body 1 has filling channel 13 that is communicated with first end 11 and second end 12, core rod 2 passes through filling channel 13, and first sealing gasket 3 and second sealing gasket 4 that are spaced apart along the direction from first end 11 to second end 12 are arranged on core rod 2, the outer diameter of first sealing gasket 3 is less than the outer diameter of second sealing gasket 4, filling channel 13 is provided with sealing surface 14 close to second end 12, the inner diameter of sealing surface 14 gradually increases along the direction from first end 11 to second end 12, and core rod 2 can move between first position and second position; when being in first position, first sealing gasket 3 and second sealing gasket 4 are tightly abutted with sealing surface 14 to form double-sealing structure, the sealing stability is increased, and the slow leakage condition is effectively improved; when being in second position, first sealing gasket 3 and second sealing gasket 4 are separated from sealing surface 14, and filling channel 13 is in an open state, which can fill refrigerant;

[0036] In addition, elastic member 5 is arranged between core rod 2 and core body 1, the elastic force generated by elastic member 5 makes core rod 2 have the tendency of moving to first position, so that first sealing gasket 3 and second sealing gasket 4 are always tightly attached to sealing surface 14 when core rod 2 is not subjected to external force, and the sealing effect is guaranteed.

[0037] It should be noted that Figure 3 , the arrow direction is the flow direction of refrigerant when filling refrigerant.

[0038] In the embodiment, please refer toFigures 1-4 The first placement groove 21 is arranged on the core rod 2 at a position corresponding to the first sealing gasket 3, and part of the first sealing gasket 3 is embedded in the first placement groove 21, the first placement groove 21 is used for positioning the first sealing gasket 3, and the surface of the first sealing gasket 3 exposed from the first placement groove 21 can be attached to the sealing surface 14; the second placement groove 22 is arranged on the core rod 2 at a position corresponding to the second sealing gasket 4, and part of the second sealing gasket 4 is embedded in the second placement groove 22, the second placement groove 22 is used for positioning the second sealing gasket 4, and the surface of the second sealing gasket 4 exposed from the second placement groove 22 can be attached to the sealing surface 14.

[0039] Further, please refer to Figures 1-4 The spacing boss 23 is arranged on the core rod 2 at a position between the first sealing gasket 3 and the second sealing gasket 4, the outer diameter of the spacing boss 23 is greater than the outer diameter of the first sealing gasket 3, the spacing boss 23 can effectively support the first sealing gasket 3 during refrigerant charging, and can separate the first sealing gasket 3 and the second sealing gasket 4, preventing the first sealing gasket 3 and the second sealing gasket 4 from directly interacting with each other to cause deformation when being pressed, thereby affecting the sealing performance; when the core rod 2 is located at the first position, there is a gap between the spacing boss 23 and the sealing surface 14, the spacing boss 23 does not hinder the close attachment between the first sealing gasket 3, the second sealing gasket 4 and the sealing surface 14, thereby ensuring the sealing performance.

[0040] Further, please refer to Figures 1-4 The limiting boss 24 is arranged at a position of the second placement groove 22 corresponding to the outer edge of the second sealing gasket 4, the limiting boss 24 can better position the second sealing gasket 4, and can prevent the second sealing gasket 4 from being blown over or out during refrigerant charging, thereby ensuring the effectiveness and safety of the valve core sealing performance; further, during the sealing process, the limiting boss 24 can abut against the second end 12 of the core body 1 for limiting, thereby preventing the sealing gasket from being damaged when the core rod 2 is subjected to excessive force.

[0041] In the embodiment, please refer to Figures 1-4 The sealing surface 14 is arranged as a conical surface, specifically, the angle of the sealing surface 14 is 24-26°, the sizes of the first sealing gasket 3 and the second sealing gasket 4 are matched with the sealing surface 14, and the optimal sealing effect can be achieved; in other embodiments, the sealing surface 14 can also be an arc surface, so as to closely cooperate with the first sealing gasket 3 and the second sealing gasket 4 at the same time, thereby ensuring the stable and accurate sealing effect.

[0042] Specifically, the outer diameter of the first sealing gasket 3 is preferably 3.15-3.45 mm, the outer diameter of the second sealing gasket 4 is preferably 4-4.6 mm, the materials of the first sealing gasket 3 and the second sealing gasket 4 are both preferably rubber, and the cross sections of the first sealing gasket 3 and the second sealing gasket 4 are both preferably rectangular or circular, which can adapt to multiple working conditions.

[0043] In the embodiment, please refer to Figure 1 and Figure 3 , one end of the core rod 2 extends from the first end 11 and has a limiting surface 25, the elastic member 5 is located outside the core body 1, one end of the elastic member 5 abuts against the limiting surface 25, the other end of the elastic member 5 abuts against the end surface of the first end 11, the elastic member 5 is in a compressed state and can exert a stable elastic force on the core rod 2; specifically, the end of the core rod 2 extending from the first end 11 forms the limiting surface 25 through a punch riveting process, the elastic member 5 is a spring, and the spring is sleeved on the core rod 2; in other embodiments, the elastic member 5 can also be a spring sheet, as long as it can exert a stable elastic force on the core rod 2.

[0044] In the second aspect, please refer to Figure 5 , one embodiment of the present application provides a kind of filling valve, including valve body 6 and the air conditioner filling valve core of preceding one, valve body 6 is arranged on automobile air conditioner, core body 1 is sealed and fixed in valve body 6, can realize the refrigerant filling and sealing of automobile air conditioner.

[0045] Further, please refer to Figure 5 , the core body 1 has an external thread 15, the valve body 6 has an internal thread 61 matched with the external thread 15, and the core body 1 and the valve body 6 are fastened and sealed by thread cooperation; further, a sealing ring 7 should be embedded between the core body 1 and the valve body 6, an open groove matched with the sealing ring 7 is arranged on the outer circumferential surface of the core body 1, part of the sealing ring 7 is embedded in the open groove for positioning, which can improve the sealing between the valve body 6 and the core body 1.

[0046] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An air conditioner charging spool, characterized by, The application relates to a core body (1) with a first end (11) and a second end (12), a filling channel (13) in the core body (1) for connecting the first end (11) and the second end (12), a sealing surface (14) near the second end (12), and an inner diameter of the sealing surface (14) gradually increasing from the first end (11) to the second end (12); a core rod (2) passing through the filling channel (13), a first sealing pad (3) and a second sealing pad (4) on the core rod (2) and spaced apart from each other from the first end (11) to the second end (12), an outer diameter of the first sealing pad (3) being smaller than that of the second sealing pad (4); the core rod (2) being movable between a first position and a second position; in the first position, the first sealing pad (3) and the second sealing pad (4) are in abutment with the sealing surface (14), and the filling channel (13) is in a closed state; in the second position, the first sealing pad (3) and the second sealing pad (4) are separated from the sealing surface (14), and the filling channel (13) is in an open state; an elastic member (5) arranged between the core rod (2) and the core body (1), and the elastic member (5) making the core rod (2) have a tendency to move to the first position. The first sealing pad (3) is partially embedded in a first placing groove (21) on the core rod (2) corresponding to the position of the first sealing pad (3); and the second sealing pad (4) is partially embedded in a second placing groove (22) on the core rod (2) corresponding to the position of the second sealing pad (4). A spacing boss (23) is arranged on the core rod (2) between the first sealing pad (3) and the second sealing pad (4), and an outer diameter of the spacing boss (23) is greater than that of the first sealing pad (3); when the core rod (2) is in the first position, a gap is formed between the spacing boss (23) and the sealing surface (14). A limiting boss (24) is arranged on the second placing groove (22) corresponding to an outer edge of the second sealing pad (4).

2. An air conditioner charging valve core according to claim 1, characterized by The sealing surface (14) is a conical surface.

3. An air conditioner charging valve core according to claim 2, characterized by An angle of the sealing surface (14) is 24-26 degrees, and sizes of the first sealing pad (3) and the second sealing pad (4) are matched with that of the sealing surface (14).

4. An air conditioner charging valve core according to claim 2, characterized by An outer diameter of the first sealing pad (3) is 3.15-3.45 mm; 5. An air conditioner charging valve core according to claim 1, characterized by An outer diameter of the second sealing pad (4) is 4-4.6 mm; 6. An air conditioner charging valve core according to claim 5, characterized by Materials of the first sealing pad (3) and the second sealing pad (4) are rubber; 7. An air conditioner charging valve core according to claim 1 or 6, characterized in that, Cross sections of the first sealing pad (3) and the second sealing pad (4) are rectangular or circular. ​ ​ ​ 8. An air conditioner charging valve core according to claim 1, characterized by One end of the core rod (2) extends from the first end (11) and has a limiting surface (25), the elastic member (5) is located outside the core body (1), one end of the elastic member (5) abuts against the limiting surface (25), the other end of the elastic member (5) abuts against the end surface of the first end (11), and the elastic member (5) is in a compressed state; And / or, the elastic member (5) is a spring, and the spring is sleeved on the core rod (2).

9. A charging valve characterized by, The air conditioner charging valve core comprises a valve body (6) and a core body (1) as claimed in any one of claims 1-8, and the core body (1) is fixed in the valve body (6).

10. A charge valve according to claim 9, wherein The core body (1) has an external thread (15) thereon, the valve body (6) has an internal thread (61) matching the external thread (15) therein, and the core body (1) is threadedly connected with the valve body (6). And / or, a sealing ring (7) is embedded between the core body (1) and the valve body (6).

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