Novel high-pressure automobile air conditioner filling valve element

Abstract

The utility model discloses a novel high-pressure automobile air conditioner filling valve core, which belongs to the field of automobile air conditioner systems and comprises a core body and a core rod, a channel is arranged in the center of the core body, and the core rod penetrates through the channel. A core spring is arranged on the core rod, a sealing gasket is arranged at the end part of the core rod or the core body, and the core spring acts on the core rod and the core body to enable the sealing gasket to seal the channel; the channel comprises a large-diameter hole and a small-diameter hole which are communicated, the small-diameter hole is communicated with one end of the core body through the large-diameter hole, and the large-diameter hole is close to the sealing gasket; a guide table is arranged on the core rod, a gap is formed between the guide table and the sealing gasket, the maximum diameter of the guide table is larger than the inner diameter of the small-diameter hole and smaller than the inner diameter of the large-diameter hole, a sealing ring is arranged at the transition position between the large-diameter hole and the small-diameter hole or on the guide face of the guide table, and the core rod is stressed so that the sealing ring can seal the channel. By means of the structure, the sealing performance under the long-term high-pressure operation condition can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile air conditioning system, concretely relates to a novel high pressure automobile air conditioning filling valve core. BACKGROUND

[0002] With the development of automobile technology, especially the rapid popularization of new energy vehicles, higher requirements are put forward for the performance and efficiency of automobile air conditioning systems, new energy vehicles usually adopt high-voltage electrical systems, which puts forward higher standards for the insulation of automobile air conditioning systems, therefore, the research and development of high-pressure-resistant automobile air conditioning filling valve core has become an important direction to improve the safety and reliability of automobile air conditioning systems.

[0003] In the high-pressure automobile air conditioning system, the valve core is a key control element responsible for adjusting the flow of refrigerant, which affects the refrigeration effect and energy consumption of the air conditioning system. The high-pressure-resistant valve core can operate stably under higher working pressure, which is particularly important for ensuring the normal operation of the air conditioning system under extreme working conditions.

[0004] In view of the above problems, the utility model designs and manufactures a novel high pressure automobile air conditioning filling valve core to overcome the above defects. UTILITY MODEL CONTENTS

[0005] For the problems existing in the prior art, the utility model provides a novel high pressure automobile air conditioning filling valve core, which can improve the sealing performance under long-term high pressure operation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a novel high pressure automobile air conditioning filling valve core, comprising a core body and a core rod, the core body is provided with a channel in the center, the core rod penetrates the channel;

[0007] A core spring is arranged on the core rod, a sealing gasket is arranged at the end of the core rod or the core body, and the core spring acts on the core rod and the core body to make the sealing gasket seal the channel;

[0008] The channel comprises a large-diameter hole and a small-diameter hole connected in series, the small-diameter hole is communicated with one end of the core body through the large-diameter hole, and the large-diameter hole is close to the sealing gasket;

[0009] A guide table is arranged on the core rod, a spacing is arranged between the guide table and the sealing gasket, the maximum diameter of the guide table is greater than the inner diameter of the small-diameter hole and less than the inner diameter of the large-diameter hole, a sealing ring is arranged on the transition position between the large-diameter hole and the small-diameter hole or the guide surface of the guide table, and the core rod can make the sealing ring seal the channel under stress.

[0010] Preferably, the sealing ring is made of polyether ether ketone material.

[0011] Preferably, the axial distance between the sealing gasket and the sealing abutting position is smaller than the axial distance between the sealing ring and the sealing abutting position when the sealing gasket does not seal the channel.

[0012] Preferably, the end of the core rod is provided with a boss, and a sealing outer ring groove is arranged on the sidewall of the boss, and the sealing gasket is arranged in the sealing outer ring groove.

[0013] Preferably, the end of the large-diameter hole communicated with the core body is provided with a first tapered hole, and the sealing gasket can abut on the tapered surface of the first tapered hole.

[0014] Preferably, the outer diameter of the sealing gasket is greater than the minimum diameter of the first tapered hole and smaller than the maximum diameter of the first tapered hole.

[0015] Preferably, a sealing inner ring groove is arranged at the transition position between the large-diameter hole and the small-diameter hole, the groove bottom diameter of the sealing inner ring groove is greater than the inner diameter of the large-diameter hole, and the sealing ring is arranged in the sealing inner ring groove.

[0016] The inner diameter of the sealing ring is not less than the inner diameter of the small-diameter hole.

[0017] Preferably, the sealing ring is in clearance fit with the sealing inner ring groove.

[0018] Preferably, the ring hole near one end of the large-diameter hole of the sealing ring is provided with a second tapered hole.

[0019] Preferably, the maximum diameter of the second tapered hole is not less than the inner diameter of the large-diameter hole.

[0020] The utility model has the advantages of:

[0021] 1. The double-channel sealing structure is formed by the sealing gasket and the sealing ring, and after the sealing gasket deforms under high pressure, the sealing ring can simultaneously play a sealing role with the sealing gasket, thereby improving the sealing performance of the valve core under long-term high pressure.

[0022] 2. The guiding table of the utility model is more conducive to the sealing cooperation with the sealing ring, and the guiding surface is also conducive to the cooperation and guidance with the channel after gas injection.

[0023] 3. The utility model fully utilizes the cooperation of the sizes of the large-diameter hole and the small-diameter hole in the channel and the sizes and structures of the boss of the core rod and the guiding table, thereby ensuring that the sealing gasket and the sealing ring do not interfere with each other during sealing.

[0024] 4. The groove bottom diameter of the sealing inner ring groove is greater than the inner diameter of the large-diameter hole and smaller than the outer diameter of the sealing ring, thereby ensuring that the sealing ring can be simultaneously embedded into the large-diameter hole and the small-diameter hole, and the valve core can not fall off during the inflation process. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1It is a schematic view of a new type of high pressure automobile air conditioner filling valve core when injecting gas;

[0026] Fig. 2 It is a schematic view of a new type of high pressure automobile air conditioner filling valve core when sealing the sealing ring sealing channel;

[0027] Fig. 3 It is a partial enlarged view of A in the utility model.

[0028] In the figure: 1, core body; 2, core rod; 3, core spring; 4, small diameter hole; 5, large diameter hole; 6, sealing gasket; 7, sealing ring; 8, boss; 9, guide table; 10, first taper hole; 11, second taper hole. DETAILED DESCRIPTION

[0029] In order to facilitate those skilled in the art to understand, the utility model is further explained below in combination with the drawings.

[0030] As Figs. 1-3 shown, a new type of high pressure automobile air conditioner filling valve core, including core body 1 and core rod 2, core body 1 center is equipped with channel, and core rod 2 penetrates channel, and when the valve core injects or exhausts, injects or exhausts through the gap between core rod 2 and channel.

[0031] Core rod 2 is equipped with core spring 3, and the end of core rod 2 or core body 1 is equipped with sealing gasket 6, and core spring 3 acts on core rod 2 and core body 1 to make sealing gasket 6 seal channel, and the structure belongs to prior art, and whether sealing gasket 6 is installed on core rod 2 or core body 1, as long as it can guarantee that sealing gasket 6 can seal channel when the valve core needs to be sealed.

[0032] The channel of the utility model includes large diameter hole 5 and small diameter hole 4 in communication, and small diameter hole 4 is communicated with one end of core body 1 through large diameter hole 5, and large diameter hole 5 is close to sealing gasket 6.

[0033] The end of core rod 2 is equipped with boss 8, and the guide table 9 is further provided on the core rod 2, and the guide table 9 is provided with a spacing between the boss 8, and the maximum diameter of the guide table 9 is greater than the inner diameter of the small diameter hole 4 and less than the inner diameter of the large diameter hole 5, so that the guide table 9 can enter the large diameter hole 5.

[0034] The transition position between large diameter hole 5 and small diameter hole 4 or the guide surface of guide table 9 is provided with sealing ring 7, and the core rod 2 can make the sealing ring 7 seal the channel under stress, and specifically after the sealing gasket 6 deforms under high pressure, the sealing gasket 6 and the sealing ring 7 seal the channel at the same time.

[0035] By means of sealing gasket 6 and sealing ring 7, a double-sealing structure is formed, and after the sealing gasket 6 deforms under high pressure, the sealing ring 7 can seal with the sealing gasket 6 at the same time, which improves the sealing property of the valve core under long-term high pressure.

[0036] When the sealing gasket 6 does not seal the channel, the axial distance between the sealing gasket 6 and the sealing abutting position of the sealing gasket 6 is smaller than the axial distance between the sealing ring 7 and the sealing abutting position of the sealing ring 7, in the unsealed state or the un-gas-filled state, the channel is first sealed by the sealing gasket 6, so that the sealing gasket 6 plays a main sealing role, and when the sealing gasket 6 is deformed in a long-term high-pressure state, the core rod 2 moves, and the sealing ring 7 seals the channel together with the sealing gasket 6.

[0037] The sealing gasket 6 is arranged in the sealing outer ring groove, and of course, the sealing gasket 6 can also be arranged outside the end portion of the core body 1, which can also seal the channel in cooperation with the boss 8.

[0038] In order to improve the sealing effect, the end portion of the large-diameter hole 5 communicated with the core body 1 is provided as a first tapered hole 10, the sealing gasket 6 can abut on the tapered surface of the first tapered hole 10, the outer diameter of the sealing gasket 6 is greater than the minimum diameter of the first tapered hole 10 and smaller than the maximum diameter of the first tapered hole 10. The sealing gasket 6 and the tapered surface of the first tapered hole 10 form a line-surface contact, and of course, the position where the sealing gasket 6 cooperates with the tapered surface of the first tapered hole 10 can also be provided as an inclined surface structure, so as to form a surface-surface contact sealing.

[0039] The transition position between the large-diameter hole 5 and the small-diameter hole 4 is provided with a sealing inner ring groove, the groove bottom diameter of the sealing inner ring groove is greater than the inner diameter of the large-diameter hole 5, and the sealing ring 7 is arranged in the sealing inner ring groove. The structure can make the sealing ring 7 be embedded into the large-diameter hole 5 and the small-diameter hole 4 at the same time, so that the valve core can not fall off during the inflation process, and the sealing effect of the sealing ring 7 becomes more obvious with the increase of the gas pressure in the pipeline. The inner diameter of the sealing ring 7 is preferably not less than the inner diameter of the small-diameter hole 4, which can avoid that the protruding sealing ring 7 affects the inflation of the valve core.

[0040] The ring hole of the sealing ring 7 close to one end of the large-diameter hole 5 is preferably provided as a second tapered hole 11, and the maximum diameter of the second tapered hole 11 is preferably not less than the inner diameter of the large-diameter hole 5, which can avoid that the protruding sealing ring 7 affects the exhaust of the valve core.

[0041] In addition, the sealing ring 7 in the utility model is preferably made of polyether ether ketone material, which is a kind of high-performance special engineering plastic. Compared with ordinary sealing rubber, the hardness of the material is larger, and it is not easy to deform, and it has the advantages of high strength, high temperature resistance, chemical corrosion resistance and wear resistance, which can ensure that it will not be deformed in a long-term high-pressure state.

[0042] When the sealing ring 7 is made of polyether ether ketone material, the sealing ring 7 and the sealing inner ring groove are preferably gap-fitted to avoid that the deformation of the sealing ring 7 affects the sealing effect.

[0043] The utility model specifically shows the state of the inflation and the sealing of the sealing ring 7 as follows:

[0044] AsFig. 1 As shown, during the gas injection process, the core rod 2 moves downward under the push of the gas pressure, the sealing gasket 6 is separated from the core body 1, a gas flow channel is formed, and the refrigerant is filled into the pipeline. When the pipeline is full, the gas pressure in the pipeline will reversely push the sealing gasket 6 to move upward, the sealing gasket 6 is in contact with the core body 1, and the sealing effect is achieved.

[0045] As shown in the drawings, the sealing gasket 6 is deformed under the high pressure for a long time, and the deformed sealing gasket 6 moves upward with the core rod 2. During the movement, the guide surface of the guide table 9 on the core rod 2 is in contact with the sealing ring 7, a limiting effect is formed, the sealing gasket 6 and the core rod 2 are prevented from continuously moving upward, the sealing ring 7 is forced by the core rod 2, a secondary sealing is formed, and the air tightness of the valve core is ensured. Fig. 2

[0046] It should be understood that the use of these embodiments is only for the purpose of illustrating the present application and is not intended to limit the protection scope of the present application. In addition, it should also be understood that after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.​

Claims

1. A new high pressure automotive air conditioning charging valve core, characterized in that, It comprises a core body (1) and a core rod (2), the core body (1) is provided with a channel in the center, and the core rod (2) penetrates through the channel; The core rod (2) is provided with a core spring (3), and the end of the core rod (2) or the core body (1) is provided with a sealing gasket (6), the core spring (3) acts on the core rod (2) and the core body (1) so that the sealing gasket (6) seals the channel; The channel comprises a large-diameter hole (5) and a small-diameter hole (4) connected in communication, the small-diameter hole (4) communicates with one end of the core body (1) through the large-diameter hole (5), and the large-diameter hole (5) is close to the sealing gasket (6); The core rod (2) is provided with a guide table (9), a spacing is arranged between the guide table (9) and the sealing gasket (6), the maximum diameter of the guide table (9) is greater than the inner diameter of the small-diameter hole (4) and less than the inner diameter of the large-diameter hole (5), a sealing ring (7) is arranged on the transition position between the large-diameter hole (5) and the small-diameter hole (4) or the guide surface of the guide table (9), and the core rod (2) is stressed to enable the sealing ring (7) to seal the channel.

2. A new type of high pressure automobile air conditioner charging valve core according to claim 1, characterized in that, The sealing ring (7) is made of polyether ether ketone material.

3. A new type of high pressure automobile air conditioner charging valve core according to claim 1, characterized in that, When the sealing gasket (6) does not seal the channel, the axial distance between the sealing gasket (6) and the sealing abutting position is less than the axial distance between the sealing ring (7) and the sealing abutting position.

4. A new type of high pressure automobile air conditioner charging valve core according to claim 1, characterized in that, The end of the core rod (2) is provided with a boss (8), the side wall of the boss (8) is provided with a sealing outer ring groove, and the sealing gasket (6) is installed in the sealing outer ring groove.

5. A new type of high pressure automobile air conditioner charging valve core according to claim 1, characterized in that, The end of the large-diameter hole (5) in communication with the core body (1) is provided as a first tapered hole (10), and the sealing gasket (6) can abut on the tapered surface of the first tapered hole (10).

6. A new type of high pressure automotive air conditioning charging valve core according to claim 5, characterized in that, The outer diameter of the sealing gasket (6) is greater than the minimum diameter of the first tapered hole (10) and less than the maximum diameter of the first tapered hole (10).

7. A new type of high pressure automobile air conditioner charging valve core according to claim 1, characterized in that, The transition position between the large-diameter hole (5) and the small-diameter hole (4) is provided with a sealing inner ring groove, and the sealing ring (7) is installed in the sealing inner ring groove; The inner diameter of the sealing ring (7) is not less than the inner diameter of the small-diameter hole (4).

8. A new type of high pressure automobile air conditioner charging valve core according to claim 2, characterized in that, The sealing ring (7) is gap-fitted with the sealing inner ring groove.

9. A new type of high pressure automotive air conditioning charging valve core according to claim 7, characterized in that, The ring hole close to one end of the large-diameter hole (5) of the sealing ring (7) is provided as a second tapered hole (11).

10. A new type of high pressure automotive air conditioning charging valve core according to claim 9, characterized in that, The maximum diameter of the second tapered hole (11) is not less than the inner diameter of the large-diameter hole (5).

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