A new type of self-sealing nut and air conditioner

Abstract

The present invention discloses a novel self-sealing nut and an air conditioner, comprising a self-sealing nut, wherein the self-sealing nut comprises a housing and a valve core, wherein the air inlet end of the housing is provided with a valve core connection portion, and the air outlet end of the housing is provided with a pipe joint connection portion; the housing is provided with an annular fixing portion, a valve core sealing ring installation groove is formed between the annular fixing portion and the valve core connection portion, and a valve core sealing ring is installed inside the valve core sealing ring installation groove; the cross section of the valve core sealing ring is an oblique conical surface structure, and the valve core is provided with an end cap, and the end cap is provided with an oblique conical surface structure adapted to the valve core sealing ring. By setting the sealing surfaces of the valve core sealing ring and the valve core as oblique conical surface structures, the valve core and the valve core sealing ring of the self-sealing nut are optimized to a vertical extrusion structure between the conical surfaces, replacing the traditional horizontal extrusion mode, thereby increasing the sealing area, and the pressure bearing capacity increases as the internal pressure increases, thus having a stronger pressure bearing capacity, solving the problems of large leakage rate and unstable sealing performance of the self-sealing nut under medium and high pressure, and having good sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, in particular to a novel self-sealing nut and an air conditioner. Background Art

[0002] During the production process of air conditioners, operations such as evacuating air, filling helium, or injecting refrigerant are required for air conditioners. Therefore, a self-sealing nut needs to be docked at the connection pipe joint of the air conditioner for subsequent use. The self-sealing nut is hermetically connected to the connection pipe joint and has a self-sealing function itself, playing an extremely important role.

[0003] However, for the existing self-sealing nut, the valve core and the valve core sealing ring are in a horizontal extrusion mode, and the sealing performance is unstable. The degree of micro-leakage under low pressure is acceptable, but when under medium and high pressures, this extrusion mode will not increase the pressure-bearing capacity as the pressure increases, but is prone to greater leakage. Summary of the Invention

[0004] In order to overcome the above-mentioned drawbacks of the prior art, the present invention provides a novel self-sealing nut and an air conditioner, aiming to solve the problem of unstable sealing performance of the existing self-sealing nut.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a novel self-sealing nut, including a self-sealing nut, the self-sealing nut includes a shell and a valve core, a valve core connecting part is provided at the air inlet end of the shell, and a pipe joint connecting part is provided at the air outlet end of the shell; the shell is provided with an annular fixing part, a valve core sealing ring installation groove is formed between the annular fixing part and the valve core connecting part, and a valve core sealing ring is installed inside the valve core sealing ring installation groove; the cross-section of the valve core sealing ring is an inclined cone surface structure, the valve core is provided with an end cap, and the end cap is provided with an inclined cone surface structure adapted to the valve core sealing ring. The valve core and the valve core sealing ring are mutually abutted to form a sealing structure.

[0006] As a further improvement of the present invention: the cross-section of the valve core sealing ring installation groove is a "U" - shaped structure.

[0007] As a further improvement of the present invention: the shell is provided with an annular clamping part, a pipe joint sealing ring installation groove is formed between the annular clamping part and the annular fixing part, and a pipe joint sealing ring is embedded inside the pipe joint sealing ring installation groove. By partially embedding the pipe joint sealing ring into the shell, the reuse rate of the self-sealing nut is increased, and the material cost is reduced.

[0008] As a further improvement of the present invention: the pipe joint sealing ring is provided with an inclined cone surface structure adapted to the pipe joint.

[0009] As a further improvement of the present invention: the cross-section of the pipe joint sealing ring installation groove is an "L" - shaped structure.

[0010] As a further improvement of the present invention: the air inlet end of the shell is provided with a window structure.

[0011] As a further improvement of the present invention: two window structures are provided, and the two window structures are arranged opposite to each other at the air inlet end of the shell.

[0012] As a further improvement of the present invention: the housing is made of transparent plastic, which makes it easy to observe the status of the valve core sealing ring and the pipe joint sealing ring in the housing.

[0013] As a further improvement of the present invention: the shell is made of transparent PET resin material.

[0014] An air conditioner comprises the self-sealing nut.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention sets the sealing surfaces of the valve core sealing ring and the valve core as an oblique cone structure, and optimizes the valve core and the valve core sealing ring of the self-sealing nut into a vertical extrusion structure between the cone surfaces, replacing the traditional horizontal extrusion mode. The sealing area is increased, and the pressure bearing capacity increases with the increase of internal pressure, and the pressure bearing capacity is stronger. It solves the problems of large leakage rate and unstable sealing performance of self-sealing nuts under medium and high pressures, and has good sealing performance.

[0017] 2. The present invention solves the problem that the sealing ring of the pipe joint is easy to fall off and lose the sealing ability after repeated use of the existing self-sealing nut by partially embedding the pipe joint sealing ring into the shell, thereby improving the reuse rate of the self-sealing nut and reducing material costs.

[0018] 3. The present invention provides two window structures at the air inlet end of the self-sealing nut, so that the residual gas in the cavity generated by the air conditioner evaporator during the gas filling process can be diffused into the surrounding air at the fastest speed, preventing the residual gas from causing false alarms in the helium detection equipment during the subsequent leak detection process, thereby affecting the production efficiency of the test results.

[0019] 4. The present invention adopts a shell made of transparent plastic, which makes it easy and intuitive to see the current state of the sealing ring of the self-sealing nut, effectively solving the risk of sealing failure and leakage caused by damage or skewness of the sealing ring, and the internal state is controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the internal structure of the self-sealing nut of the present invention.

[0021] Figure 2 Schematic diagram of the internal structure of the shell.

[0022] Figure 3It is a schematic diagram of the assembly structure of the valve core sealing ring, pipe joint sealing ring and housing.

[0023] Figure 4 It is a schematic diagram of the assembly structure of the self-sealing nut and the pipe joint.

[0024] Figure 5 It is a structural diagram of the valve core.

[0025] Figure numerals: 1. Pipe joint sealing ring; 2. Valve core sealing ring; 3. Valve core; 4. Window structure; 5. Shell; 6. Pipe joint; 31. End cap; 51. Air inlet end; 52. Air outlet end; 53. Valve core connecting part; 54. Pipe joint connecting part; 55. Annular fixing part; 56. Valve core sealing ring mounting groove; 57. Annular clamping part; 58. Sealing ring mounting groove. DETAILED DESCRIPTION

[0026] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. The present invention will now be further described with reference to the accompanying drawings and embodiments:

[0027] See also Figure 1-5 A novel self-sealing nut includes a self-sealing nut, the self-sealing nut includes a shell 5 and a valve core 3, the shell is provided with an air inlet end 51 and an air outlet end 52, the air inlet end of the shell is provided with a valve core connecting portion 53 for connecting to the valve core, the air outlet end of the shell is provided with a pipe joint connecting portion 54 for connecting to a pipe joint, and the pipe joint connecting portion is adapted to the pipe joint 6;

[0028] The housing is provided with an annular fixing portion 55, and a valve core sealing ring installation groove 56 is formed between the annular fixing portion and the valve core connecting portion 53, and the valve core sealing ring 2 is installed inside the valve core sealing ring installation groove;

[0029] The cross section of the valve core sealing ring 2 is an oblique conical surface structure. The valve core 3 is provided with an end cap 31 . The end cap is provided with an oblique conical surface structure adapted to the valve core sealing ring.

[0030] The valve core and the valve core sealing ring abut against each other to form a sealing structure.

[0031] By setting both the valve core sealing ring and the sealing surface of the valve core as inclined cone surface structures, when the valve core 3 is closed with the valve core sealing ring under pressure, good sealing performance can be generated, solving the problem of unstable sealing performance of the existing self-sealing nut.

[0032] The valve core 3 and the valve core sealing ring 2 are in mutual abutment to form the opening and closing sealing structure of the self-sealing nut. Since both the valve core sealing ring and the valve core are provided with inclined cone surface structures, when the internal gas pressure in the air conditioner evaporator increases, the inclined surface of the valve core 3 will give a greater positive pressure to the inclined surface of the valve core sealing ring 2, making the valve core sealing ring 2 and the valve core 3 fit more closely. A greater internal gas pressure will further enhance the sealing ability of the self-sealing nut, and the micro-leakage rate under medium and high pressures can be reduced.

[0033] By optimizing the valve core and the valve core sealing ring of the self-sealing nut into a vertical extrusion structure between conical surfaces, replacing the traditional horizontal extrusion mode, the sealing area is increased, the pressure-bearing capacity increases with the increase of the internal pressure, and the pressure-bearing capacity is stronger, solving the problem of too large leakage rate of the self-sealing nut under medium and high pressures.

[0034] The cross-section of the installation groove of the valve core sealing ring is a "U" - shaped structure.

[0035] The thickness of the valve core sealing ring 2 is increased to twice the existing thickness. By increasing the thickness of the valve core sealing ring, the pressure-bearing capacity of the self-sealing nut can be effectively increased, and the sealing performance when the valve core 3 is closed under pressure can be further improved.

[0036] The housing 5 is provided with an annular clamping portion 57. A pipe joint sealing ring installation groove 58 is formed between the annular clamping portion and the annular fixing portion, and a pipe joint sealing ring 1 is embedded inside the pipe joint sealing ring installation groove.

[0037] The pipe joint sealing ring is provided with an inclined cone surface structure adapted to the pipe joint.

[0038] The pipe joint sealing ring and the pipe joint are in mutual abutment to form a sealing structure.

[0039] The cross-section of the pipe joint sealing ring installation groove is an "L" - shaped structure.

[0040] [[ID=,27]]By partially embedding the pipe joint sealing ring 1 into the housing, the problem that the pipe joint sealing ring is prone to fall off and lose the sealing ability after the existing self-sealing nut is used multiple times is solved, the reuse rate of the self-sealing nut is improved, and the material cost is reduced.

[0041] Due to the universality of the A - type pipe joint of the air conditioner evaporator, the pipe joint sealing ring is directly used to replace the red cavity component for accommodating the valve core and the pipe joint sealing ring in the existing self-sealing nut, and an integrated structure with the valve core directly extending into the pipe joint is adopted, reducing the complexity in the design and production of the self-sealing nut, reducing the volume of the self-sealing nut, and reducing the cost.

[0042] The air inlet end of the shell is provided with a window structure 4.

[0043] Preferably, there are two window structures, which are arranged opposite to each other at the air inlet end of the shell.

[0044] While ensuring the strength of the self-sealing nut's inlet end, windows are provided at the inlet end. Two windows extend through the inlet end of the housing. This allows residual gas in the air-conditioning evaporator cavity, generated during the gas filling process, to diffuse rapidly into the surrounding air. This prevents residual gas from causing false alarms in the helium detection equipment during subsequent leak detection processes, impacting test results and production efficiency.

[0045] The self-sealing nut is made of plastic.

[0046] The housing 5 is made of transparent plastic.

[0047] The shell is made of transparent plastic, which allows you to easily and intuitively see the current status of the sealing ring of the self-sealing nut, effectively solving the risk of sealing failure and leakage caused by damage or skewness of the sealing ring. The internal status is controllable, solving the problem that the status of the internal sealing ring of the existing self-sealing nut cannot be effectively identified.

[0048] Preferably, the shell 5 is made of transparent PET resin material.

[0049] The self-sealing nut of the present invention has the advantages of improving the performance of the self-sealing nut and reducing production costs, reducing the problem of false alarms of various leak detection equipment in the production process of the air-conditioning evaporator caused by leakage of the self-sealing nut, improving the overall qualification rate and production efficiency, and reducing the quality risk of rework and production and processing costs.

[0050] An air conditioner comprises the self-sealing nut.

[0051] Implementation Case 1:

[0052] A new type of self-sealing nut, including a self-sealing nut, the self-sealing nut includes a housing and a valve core. The housing has an air inlet end and an air outlet end. The air inlet end of the housing has a valve core connection part for connecting with the valve core. The air outlet end of the housing has a pipe joint connection part for connecting with a pipe joint, and the pipe joint connection part is adapted to the pipe joint. The housing has an annular fixing part, and a valve core seal ring installation groove is formed between the annular fixing part and the valve core connection part. A valve core seal ring is installed inside the valve core seal ring installation groove. The cross-section of the valve core seal ring is an inclined cone surface structure. The valve core has an end cap, and the end cap has an inclined cone surface structure adapted to the valve core seal ring. The valve core and the valve core seal ring are in mutual contact to form a sealing structure. By setting both the sealing surface of the valve core seal ring and the valve core as inclined cone surface structures, good sealing performance can be generated when the valve core is closed with the valve core seal ring under pressure, solving the problem of unstable sealing performance of the existing self-sealing nut. The cross-section of the valve core seal ring installation groove is a "U" - shaped structure. The housing has an annular clamping part, and a pipe joint seal ring installation groove is formed between the annular clamping part and the annular fixing part. A pipe joint seal ring is embedded inside the pipe joint seal ring installation groove. The pipe joint seal ring has an inclined cone surface structure adapted to the pipe joint. The cross-section of the pipe joint seal ring installation groove is an "L" - shaped structure. By partially embedding the pipe joint seal ring into the housing, the problem that the pipe joint seal ring is likely to fall off and lose the sealing ability after multiple uses of the existing self-sealing nut is solved, improving the reuse rate of the self-sealing nut and reducing the material cost. The air inlet end of the housing has a window structure. The self-sealing nut is made of plastic. The housing is made of transparent PET resin material.

[0053] Embodiment Case Two:

[0054] A new type of self-sealing nut, including a self-sealing nut. The self-sealing nut includes a housing and a valve core. The housing has an air inlet end and an air outlet end. The air inlet end of the housing is provided with a valve core connection part for connecting with the valve core. The air outlet end of the housing is provided with a pipe joint connection part for connecting with a pipe joint, and the pipe joint connection part is adapted to the pipe joint. The housing is provided with an annular fixing part. A valve core seal ring installation groove is formed between the annular fixing part and the valve core connection part. A valve core seal ring is installed inside the valve core seal ring installation groove. The cross-section of the valve core seal ring is an inclined conical surface structure. The valve core is provided with an end cap, and the end cap is provided with an inclined conical surface structure adapted to the valve core seal ring. The valve core and the valve core seal ring are in mutual contact to form a sealing structure. By setting both the sealing surface of the valve core seal ring and the valve core as inclined conical surface structures, good sealing performance can be generated when the valve core closes with the valve core seal ring under pressure, solving the problem of unstable sealing performance of the existing self-sealing nut. The cross-section of the valve core seal ring installation groove is a "U" - shaped structure. The housing is provided with an annular clamping part. A pipe joint seal ring installation groove is formed between the annular clamping part and the annular fixing part. A pipe joint seal ring is embedded inside the pipe joint seal ring installation groove. The pipe joint seal ring is provided with an inclined conical surface structure adapted to the pipe joint. The cross-section of the pipe joint seal ring installation groove is an "L" - shaped structure. By partially embedding the pipe joint seal ring into the housing, the problem that the pipe joint seal ring is prone to fall off and lose the sealing ability after the existing self-sealing nut is used multiple times is solved, improving the reuse rate of the self-sealing nut and reducing the material cost. The air inlet end of the housing is provided with a window structure. There are two window structures, and the two window structures are oppositely arranged at the air inlet end of the housing. By providing the window structure, the cavity residual gas generated by the air conditioner evaporator during the gas filling process can diffuse into the surrounding air at the fastest speed, preventing the residual gas from causing false alarms in the helium detection equipment and affecting the production efficiency of the test results in the subsequent leak detection process. The self-sealing nut is made of plastic. The thickness of the valve core seal ring is increased to twice the existing thickness. By increasing the thickness of the valve core seal ring, the pressure-bearing capacity of the self-sealing nut can be effectively increased, and further improving the sealing performance when the valve core closes with the valve core seal ring under pressure. The housing is made of transparent plastic.

[0055] Case Three:

[0056] An air conditioner includes the self-sealing nut. The self-sealing nut includes a housing and a valve core, the housing having an air inlet end and an air outlet end, the air inlet end of the housing having a valve core connection portion for connecting to the valve core, and the air outlet end of the housing having a pipe joint connection portion for connecting to a pipe joint, the pipe joint connection portion being compatible with the pipe joint; the housing having an annular fixing portion, a valve core sealing ring mounting groove formed between the annular fixing portion and the valve core connection portion, a valve core sealing ring being mounted within the valve core sealing ring mounting groove; the valve core sealing ring having a cross-section having an oblique conical structure, the valve core having an end cap having an oblique conical structure compatible with the valve core sealing ring.

[0057] The main functions of the present invention are:

[0058] The present invention optimizes the valve core and valve core sealing ring of the self-sealing nut into a vertical extrusion structure between the conical surfaces by setting the sealing surfaces of the valve core sealing ring and the valve core to an oblique cone structure, replacing the traditional extrusion mode in the horizontal direction. The sealing area is increased, and the pressure bearing capacity increases as the internal pressure increases, and the pressure bearing capacity is stronger, thereby solving the problems of large leakage rate and unstable sealing performance of the self-sealing nut under medium and high pressure, and having good sealing performance. By partially embedding the pipe joint sealing ring into the shell, the problem that the pipe joint sealing ring of the existing self-sealing nut easily falls off and loses its sealing ability after repeated use is solved, the reuse rate of the self-sealing nut is improved, and the material cost is reduced. The pipe joint sealing ring is used to directly replace the red cavity component used to accommodate the valve core and the pipe joint sealing ring in the existing self-sealing nut, and the valve core is directly inserted into the integrated structure inside the pipe joint, which reduces the tediousness of the design and production of the self-sealing nut, reduces the volume of the self-sealing nut, and reduces the cost.

[0059] In the description of the present invention, it should be understood that the terms "upper end face", "lower end face", "top", "bottom", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention, and therefore cannot be understood as limiting the actual use direction of the present invention.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A new self-sealing nut, characterized by: It includes a self-sealing nut, the self-sealing nut includes a housing and a valve core. The intake end of the housing is provided with a valve core connecting portion, and the outlet end of the housing is provided with a pipe joint connecting portion; the housing is provided with an annular fixing portion, and a valve core seal ring installation groove is formed between the annular fixing portion and the valve core connecting portion, and a valve core seal ring is installed inside the valve core seal ring installation groove; the cross-section of the valve core seal ring is an inclined conical surface structure, the valve core is provided with an end cap, and the end cap is provided with an inclined conical surface structure adapted to the valve core seal ring; the cross-section of the valve core seal ring installation groove is a "U" - shaped structure; the housing is provided with an annular clamping portion, and a pipe joint seal ring installation groove is formed between the annular clamping portion and the annular fixing portion, and a pipe joint seal ring is embedded inside the pipe joint seal ring installation groove.

2. A novel self-sealing nut according to claim 1, characterized in that: The pipe joint seal ring is provided with an inclined conical surface structure adapted to the pipe joint.

3. A novel self-sealing nut according to claim 2, characterized in that: The cross-section of the pipe joint seal ring installation groove is an "L" - shaped structure.

4. A novel self-sealing nut according to claim 1, characterized in that: The intake end of the housing is provided with a window structure.

5. A novel self-sealing nut according to claim 4, characterized in that: There are two window structures, and the two window structures are oppositely arranged at the intake end of the housing.

6. A novel self-sealing nut according to claim 1, characterized in that: The housing is made of transparent plastic.

7. A novel self-sealing nut according to claim 1, characterized in that: The housing is made of transparent PET resin material.

8. An air conditioner, characterized in that: It includes the self-sealing nut according to any one of claims 1 - 7.

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