Air conditioner valve body adopting improved fluorine injection nozzle nut

Abstract

The utility model relates to the technical field of air conditioner valve bodies, in particular to an air conditioner valve body with an improved fluorine injection nozzle nut, which comprises a valve body and the fluorine injection nozzle nut. A valve element cavity is formed in the valve body, a fluorine injection section is formed in the valve body, a valve core is installed in the fluorine injection section, external threads are arranged outside the fluorine injection section, one end of the fluorine injection section is communicated with the valve element cavity, the other end of the fluorine injection section is a fluorine injection nozzle, and a conical face is arranged at the tail end of the fluorine injection nozzle. One end of the fluorine injection nozzle nut is a mounting port, and the other end of the fluorine injection nozzle nut is a closed mounting end; an internal thread is formed in the fluorine injection nozzle nut, a fluorine injection sealing ring is mounted at the position, close to the closed mounting end, of the internal thread, and the fluorine injection sealing ring and the fluorine injection nozzle nut are integrally formed through injection molding; the fluorine injection nozzle nut is in threaded connection with the fluorine injection section through the installation opening, and the fluorine injection sealing ring abuts against the conical face so that the fluorine injection nozzle can be sealed through the sealed installation end. According to the utility model, the firmness and the sealing performance of the connection between the fluorine injection nozzle and the fluorine injection nozzle nut are ensured, and refrigerant leakage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner valve bodies, in particular to an air conditioner valve body with an improved fluorine injection nozzle nut. Background Art

[0002] The air conditioner valve body is a crucial component in the air conditioner system, which is responsible for controlling and regulating the flow of refrigerant. In the existing air conditioner valve body design, the fluorine injection port is usually equipped with a fluorine injection port nut, and the original intention of this design is to facilitate the replenishment and maintenance of the refrigerant. However, the traditional fluorine injection port nut is only fixed by a simple threaded connection, and this method gradually shows its limitations in practical applications. Due to the fact that the tightness and stability of the threaded connection are difficult to maintain for a long time, especially after experiencing external environmental factors such as vibration and temperature changes, the connection part is prone to looseness, thus leading to the risk of refrigerant leakage.

[0003] As the core medium for transferring heat and cold energy in the air conditioner system, the known refrigerant is of self-evident importance. Any minor leakage may have a significant impact on the performance of the air conditioner system, resulting in a decline in cooling or heating efficiency and a damaged user experience. More seriously, long-term refrigerant shortage may also trigger a series of chain reactions such as compressor overheating and abnormal system pressure, causing irreversible damage to the air conditioner system, increasing the maintenance cost and the economic burden of users. Summary of the Utility Model

[0004] The purpose of the utility model is to propose an air conditioner valve body with an improved fluorine injection nozzle nut to ensure the firmness and sealing performance of the connection between the fluorine injection nozzle and the fluorine injection nozzle nut, and prevent refrigerant leakage.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An air conditioner valve body with an improved fluorine injection nozzle nut, comprising a valve body and a fluorine injection nozzle nut;

[0007] The interior of the valve body is a spool cavity. The valve body is provided with a fluorine injection section. A valve core is installed inside the fluorine injection section. External threads are provided outside the fluorine injection section. One end of the fluorine injection section communicates with the spool cavity. The other end of the fluorine injection section is a fluorine injection nozzle, and a conical surface is provided at the end of the fluorine injection nozzle;

[0008] One end of the fluorine injection nozzle nut is an installation port, and the other end is a closed installation end;

[0009] Internal threads are provided inside the fluorine injection nozzle nut. A fluorine injection sealing ring is installed near the closed installation end. The fluorine injection sealing ring is integrally formed by injection molding with the fluorine injection nozzle nut;

[0010] The fluorine injection nozzle nut is threadedly connected to the fluorine injection section through the installation port, and the fluorine injection sealing ring abuts against the conical surface so that the closed installation end closes the fluorine injection nozzle.

[0011] Preferably, a butt joint notch is provided inside the fluorine injection nozzle nut near the installation port;

[0012] A butt joint clamping part is provided outside the fluorine injection section near the valve body;

[0013] When the installation port of the fluorine injection nozzle nut gradually approaches the valve body, the butt joint notch and the butt joint clamping part abut against each other.

[0014] Preferably, several equally spaced and parallel horizontal stripes are convexly provided on the outside of the fluorine injection nozzle nut.

[0015] Preferably, an installation part is provided outward on the closed installation end, and an installation groove is provided at the center of the installation part.

[0016] Preferably, the external shape of the installation part and the internal shape of the installation groove are both polygonal.

[0017] Preferably, a clearance groove is provided inward on the closed installation end;

[0018] When the fluorine injection nozzle nut is installed on the valve body, the clearance groove is arranged opposite to the valve core inside the fluorine injection section.

[0019] Preferably, the fluorine injection nozzle nut is made of plastic material.

[0020] Preferably, the fluorine injection nozzle nut is made of red plastic material.

[0021] Preferably, one end of the valve body is a control port, and the other end of the valve body is a fixed closed end;

[0022] A top cover nut is threadedly connected to the outside of the control port;

[0023] The inside of the valve body is sequentially divided into an air inlet area and an air outlet area from one end of the control port to the fixed closed end;

[0024] The air inlet area is communicated with an air inlet section and the fluorine injection section. The opening of the air inlet section is an air inlet, and a protection nut is threadedly connected to the air inlet;

[0025] The air outlet area is communicated with an air outlet section. The opening of the air outlet section is an air outlet, and a connecting pipe is connected to the air outlet. The connecting pipe is used to communicate with an external air conditioning system;

[0026] A cut-off valve core is internally threadedly connected to the intake section. The cut-off valve core can move along the intake area, and the movement of the cut-off valve core is used to open or close the fluorine injection nozzle and the intake port.

[0027] One of the above technical solutions has the following beneficial effects:

[0028] 1. Enhance the sealing performance: By adopting an injection-molded integrated fluorine injection sealing ring and closely fitting it with the conical surface of the fluorine injection nozzle, the sealing performance between the fluorine injection nozzle nut and the fluorine injection nozzle is effectively improved. This design greatly reduces the risk of refrigerant leakage, ensuring the stable operation and high efficiency of the air-conditioning system.

[0029] 2. Improve the connection stability: The fluorine injection nozzle nut and the valve body are connected by threads, and this connection method itself has relatively high stability. The precise fit of the internal and external threads further enhances the firmness of the connection, effectively preventing refrigerant leakage problems caused by loose connections.

[0030] 3. Simplify installation and maintenance: The improved design of the fluorine injection nozzle nut makes the installation process more convenient and efficient. At the same time, due to the improved sealing performance, the trouble of frequent maintenance due to leakage is reduced, lowering the maintenance cost and the economic burden on users. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of an air-conditioning valve body with an improved fluorine injection nozzle nut according to the present utility model;

[0032] Figure 2 is an exploded schematic diagram of an air-conditioning valve body with an improved fluorine injection nozzle nut according to the present utility model;

[0033] Figure 3 is a schematic structural diagram of the fluorine injection nozzle nut in an air-conditioning valve body with an improved fluorine injection nozzle nut according to the present utility model;

[0034] Figure 4 is a schematic cross-sectional view of one perspective of an air-conditioning valve body with an improved fluorine injection nozzle nut according to the present utility model;

[0035] Figure 5 is a schematic cross-sectional view of another perspective of an air-conditioning valve body with an improved fluorine injection nozzle nut according to the present utility model;

[0036] Figure 6 is Figure 5 a partial enlarged view of part A in

[0037] In the attached drawings: valve body 1, control port 10, fluorine injection section 11, fluorine injection nozzle 110, external thread 12, conical surface 13, abutting clamping part 14, fixed closed end 15, air inlet section 16, air inlet 160, air outlet section 17, air outlet 170;

[0038] Fluorine injection nozzle nut 2, installation port 20, closed installation end 21, internal thread 22, fluorine injection sealing ring 23; abutting notch 24, horizontal stripe 25, installation part 26, installation groove 27, clearance groove 28;

[0039] Valve core 3, upper cover nut 4, protection nut 5, connecting pipe 6, stop valve core 7. Specific embodiments

[0040] The technical solution of the present invention will be further described below in conjunction with the attached drawings and through specific embodiments.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] An air conditioner valve body with an improved fluorine injection nozzle nut, comprising a valve body 1 and a fluorine injection nozzle nut 2;

[0045] The interior of the valve body 1 is a spool chamber. The valve body 1 is provided with a fluorine injection section 11. A valve core 3 is installed inside the fluorine injection section 11. An external thread 12 is provided outside the fluorine injection section 11. One end of the fluorine injection section 11 communicates with the spool chamber, and the other end of the fluorine injection section 11 is a fluorine injection nozzle 110. A conical surface 13 is provided at the end of the fluorine injection nozzle 110;

[0046] One end of the fluorine injection nozzle nut 2 is an installation port 20, and the other end of the fluorine injection nozzle nut 2 is a closed installation end 21;

[0047] An internal thread 22 is provided inside the fluorine injection nozzle nut 2. A fluorine injection seal ring 23 is installed near the closed installation end 21. The fluorine injection seal ring 23 is integrally injection-molded with the fluorine injection nozzle nut 2;

[0048] The fluorine injection nozzle nut 2 is threadedly connected to the fluorine injection section 11 through the installation port 20, and the fluorine injection seal ring 23 abuts against the conical surface 13 so that the closed installation end 21 closes the fluorine injection nozzle 110.

[0049] As Figures 1-6 shown, an air-conditioning valve body 1 with an optimized design in the present utility model is characterized in that it incorporates an improved fluorine injection nozzle nut 2.

[0050] First of all, the interior structure of the valve body 1 is a core spool chamber, and a fluorine injection section 11 is specially designed on its surface. A valve core 3 is installed inside the fluorine injection section 11 to control the injection of refrigerants such as freon. An external thread 12 is carefully machined outside the fluorine injection section 11 to facilitate a tight fit with the external fluorine injection nozzle nut 2. One end of this fluorine injection section 11 is connected to the spool chamber, and the other end is cleverly extended to form a fluorine injection nozzle 110. Particularly, a conical surface 13 is formed at the end of the fluorine injection nozzle 110 to facilitate subsequent sealing and connection operations.

[0051] Secondly, the design of the fluorine injection nozzle nut 2 is also sophisticated. One end of it is a spacious installation port 20, which is convenient for connecting with the fluorine injection section 11 of the valve body 1; the other end is a closed installation end 21 to ensure that the fluorine injection nozzle 110 can be effectively closed after connection. An internal thread 22 matching the external thread 12 of the valve body 1 is provided inside the middle section of the fluorine injection nozzle nut 2 to ensure a stable connection between the two. It is particularly worth mentioning that near the closed installation end 21, a fluorine injection seal ring 23 is embedded in the fluorine injection nozzle nut 2. Most importantly, the fluorine injection seal ring 23 and the fluorine injection nozzle nut 2 adopt an injection molding integrated technology, which not only improves the overall sealing performance but also enhances the durability of the structure.

[0052] Finally, it is actually applied to the air-conditioning system. After the fluorine injection operation is completed through the fluorine injection nozzle 110, the fluorine injection nozzle nut 2 is threadedly connected to the fluorine injection section 11 of the valve body 1 through its mounting port 20, and the built-in fluorine injection sealing ring 23 is closely attached to the conical surface 13 of the fluorine injection nozzle 110, thereby realizing the effective sealing of the closed mounting end 21 to the fluorine injection nozzle 110. This design not only simplifies the installation process, but also significantly improves the sealing performance and reliability of the air-conditioning valve body 1, can effectively prevent the refrigerant flowing through the valve core cavity from leaking, extends the service life of the air-conditioning system, and improves its overall durability.

[0053] In summary, the beneficial effects of the present utility model are as follows:

[0054] 1. Enhance the sealing performance: By adopting the injection-molded integrated fluorine injection sealing ring 23 and closely attaching it to the conical surface 13 of the fluorine injection nozzle 110, the sealing performance between the fluorine injection nozzle nut 2 and the fluorine injection nozzle 110 is effectively improved. This design greatly reduces the risk of refrigerant leakage, ensuring the stable operation and high efficiency of the air-conditioning system.

[0055] 2. Improve the connection stability: The fluorine injection nozzle nut 2 and the valve body 1 are threadedly connected, and this connection method itself has high stability. The precise fit of the internal and external threads 12 further enhances the firmness of the connection, effectively preventing the refrigerant leakage problem caused by the loosening of the connection.

[0056] 3. Simplify installation and maintenance: The improved design of the fluorine injection nozzle nut 2 makes the installation process more convenient and efficient. At the same time, due to the improvement of the sealing performance, the trouble of frequent maintenance due to leakage is also reduced, reducing the maintenance cost and the economic burden of users.

[0057] Furthermore, a butting notch 24 is provided inside the fluorine injection nozzle nut 2 near the mounting port 20;

[0058] A butting clamping portion 14 is provided outside the fluorine injection section 11 near the valve body 1;

[0059] When the mounting port 20 of the fluorine injection nozzle nut 2 gradually approaches the valve body 1, the butting notch 24 and the butting clamping portion 14 are in mutual butting.

[0060] As Figures 5-6As shown, specifically, the design of the fluorine injection nozzle nut 2 includes an abutment notch 24 near the installation port 20, and this design cleverly cooperates with the abutment clamping portion 14 outside the fluorine injection section 11 on the valve body 1. When installing, as the installation port 20 of the fluorine injection nozzle nut 2 gradually approaches the valve body 1, and is rotated and tightened along the external thread 12 of the fluorine injection section 11, the abutment notch 24 will gradually meet and abut the abutment clamping portion 14. This abutment process provides a physical limitation, preventing the fluorine injection nozzle nut 2 from being over-tightened, which not only avoids unnecessary damage to the valve body 1 or the fluorine injection nozzle nut 2 itself, but also ensures the stability and sealing of the connection while extending its service life.

[0061] To further explain, the outside of the fluorine injection nozzle nut 2 is protruded with a plurality of horizontal stripes 25 that are equally spaced and arranged in parallel.

[0062] like Figure 3 As shown, specifically, in the design of the fluorine injection nozzle nut 2, in addition to the optimization of the internal structure, its exterior is also carefully designed. Specifically, the exterior of the fluorine injection nozzle nut 2 is protruded with a plurality of horizontal stripes 25 that are equally spaced and arranged in parallel. These horizontal stripes 25 not only increase the roughness of the nut surface, but also provide it with a surface structure that is easy to hold and rotate. This allows the user to more easily hold the fluorine injection nozzle nut 2 by hand and perform preliminary tightening operations. During the tightening process, the horizontal stripes 25 can increase the friction between the nut and the hand, effectively preventing slipping caused by wet hands or greasy nut surfaces. This not only improves the accuracy of the tightening operation, but also provides the user with a convenient pre-tightening method, which helps to ensure the initial connection stability between the nut and the valve body 1.

[0063] To further explain, the closed mounting end 21 is provided with a mounting portion 26 outwardly, and a mounting groove 27 is provided at the center of the mounting portion 26 .

[0064] To further explain, the outer shape of the mounting portion 26 and the inner shape of the mounting groove 27 are both polygonal.

[0065] like Figure 3As shown, when fixing the fluorine injection nozzle nut 2, there are requirements for the torque. When the torque is too small, the sealing ring inside the nut does not fit tightly with the conical surface of the fluorine injection nozzle 110, and the effective sealing of the fluorine injection nozzle 110 cannot be achieved; when the torque is too large, the internal thread 22 of the fluorine injection nozzle nut 2 made of plastic will be damaged, and the sealing effect cannot be achieved either. Therefore, the plastic fluorine injection nozzle nut 2 needs to be fixed with a torque wrench, and its torque range value is determined by testing its airtightness and maximum torque. Therefore, in order to facilitate the use of a torque wrench to tighten the fluorine injection nozzle nut 2, an installation part 26 and an installation groove 27 are provided at its closed installation end 21. In one preferred embodiment, the external shape of the installation part 26 and the internal shape of the installation groove 27 are both polygonal, so that it can be compatible with a variety of external torque wrenches and internal torque wrenches.

[0066] For further illustration, an avoidance groove 28 is provided inwardly at the closed installation end 21;

[0067] When the fluorine injection nozzle nut 2 is installed on the valve body 1, the avoidance groove 28 is disposed opposite to the valve core 3 inside the fluorine injection section 11.

[0068] Specifically, an avoidance groove 28 is cleverly provided inwardly at the closed installation end 21. This design detail takes into account the relative positional relationship between the fluorine injection nozzle nut 2 and the valve core 3 inside the valve body 1 after installation. When the fluorine injection nozzle nut 2 is correctly installed on the valve body 1, the avoidance groove 28 will be disposed opposite to the valve core 3 inside the fluorine injection section 11, that is, the spatial position of the avoidance groove 28 avoids the valve core 3, ensuring that the valve core 3 is not affected by the installation of the fluorine injection nozzle nut 2, and reducing the risk of wear and failure caused by installation. This helps to extend the service life of the valve body 1 and the fluorine injection nozzle nut 2 and reduce the maintenance cost.

[0069] For further illustration, the fluorine injection nozzle nut 2 is made of plastic material.

[0070] For further illustration, the fluorine injection nozzle nut 2 is made of red plastic material.

[0071] In one preferred embodiment, the fluorine injection nozzle nut 2 is made of a weather-resistant plastic material with a red appearance. It can not only meet the requirements of combustible refrigerant certification and ensure the sealing performance of the air-conditioning valve body 1, but also reduce the manufacturing cost without increasing the process route or the quantity of materials; at the same time, it can prevent the fluorine injection nozzle nut 2 from fading under long-term exposure to sunlight and rain outdoors, and mark the fluorine injection nozzle 110 of the air-conditioning valve body 1 in red for warning.

[0072] For further illustration, one end of the valve body 1 is a control port 10, and the other end of the valve body 1 is a fixed closed end 15;

[0073] An upper cover nut 4 is threadedly connected to the external thread of the control port 10;

[0074] The interior of the valve body 1 is successively divided into an intake area and an exhaust area from one end of the control port 10 to the fixed closed end 15;

[0075] The intake area is communicated with an intake section 16 and the fluorine injection section 11. The opening of the intake section 16 is an intake port 160, and a protective nut 5 is threadedly connected to the intake port 160;

[0076] The exhaust area is communicated with an exhaust section 17. The opening of the exhaust section 17 is an exhaust port 170, and a connecting pipe 6 is connected to the exhaust port 170. The connecting pipe 6 is used to communicate with an external air-conditioning system;

[0077] A stop valve core 7 is threadedly connected inside the intake section 16. The stop valve core 7 can move along the intake area, and the movement of the stop valve core 7 is used to open or close the fluorine injection nozzle 110 and the intake port 160.

[0078] As Figures 1-2 shown in FIGS. 3 and 4, the air-conditioning valve body 1 is exquisitely designed and integrates multiple functions, including refrigerant injection, system connection, cut-off control, etc., making the entire air-conditioning system more compact and efficient.

[0079] First, one end of the valve body 1 is a control port 10 for operating and controlling the interior of the valve body 1; the other end is a fixed closed end 15, ensuring the integrity and stability of the structure of the valve body 1. An upper cover nut 4 is threadedly connected to the outside of the control port 10 for closing and protecting the components inside the control port 10. Moreover, the interior of the valve body 1 is successively divided into an intake area and an exhaust area from one end of the control port 10 to the closed end.

[0080] Among them, the intake area is communicated with an external refrigerant source and includes an intake section 16 and a fluorine injection section 11. The intake section 16 is provided with an intake port 160, and a protective nut 5 is threadedly connected to the intake port 160 for protecting the intake port 160 from external damage. The fluorine injection section 11 is used to inject refrigerant into the system when needed.

[0081] The exhaust area is communicated with an external air-conditioning system and includes an exhaust section 17. The exhaust section 17 is provided with an exhaust port 170, and the exhaust port 170 is connected to the air-conditioning system through a connecting pipe 6, realizing the circulating flow of the refrigerant in the system.

[0082] Finally, a stop valve core 7 is threadedly connected inside the air inlet section 16. The stop valve core 7 can move along the air inlet area, and the fluorine injection nozzle 110 and the air inlet 160 can be opened or closed by its movement. When refrigerant needs to be injected into the system, the stop valve core 7 can be moved to open the fluorine injection nozzle 110; when the air conditioning system is operating normally, the fluorine injection nozzle 110 and the air inlet 160 can be closed to prevent refrigerant leakage.

[0083] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An air-conditioning valve body using an improved fluorine injection nozzle nut, characterized in that, It comprises a valve body (1) and a fluorine injection nozzle nut (2); The interior of the valve body (1) is a valve core cavity, the valve body (1) is provided with a fluorine injection section (11), a valve core (3) is installed inside the fluorine injection section (11), an external thread (12) is provided on the outside of the fluorine injection section (11), one end of the fluorine injection section (11) is connected to the valve core cavity, the other end of the fluorine injection section (11) is a fluorine injection nozzle (110), and a conical surface (13) is provided at the end of the fluorine injection nozzle (110); One end of the fluorine injection nozzle nut (2) is a mounting opening (20), and the other end of the fluorine injection nozzle nut (2) is a closed mounting end (21); The fluorine injection nozzle nut (2) is provided with an internal thread (22), a fluorine injection sealing ring (23) is installed near the closed installation end (21) of the internal thread (22), and the fluorine injection sealing ring (23) and the fluorine injection nozzle nut (2) are integrally formed by injection molding; The fluorine injection nozzle nut (2) is threadedly connected to the fluorine injection section (11) through the mounting opening (20), and the fluorine injection sealing ring (23) abuts against the conical surface (13) so that the closed mounting end (21) closes the fluorine injection nozzle (110).

2. The air-conditioning valve body using an improved fluorine injection nozzle nut according to claim 1, characterized in that, An abutment notch (24) is provided inside the fluorine injection nozzle nut (2) near the mounting opening (20); An abutment clamping portion (14) is provided on the outside of the fluorine injection section (11) near the valve body (1); When the mounting opening (20) of the fluorine injection nozzle nut (2) gradually approaches the valve body (1), the abutment notch (24) and the abutment clamping portion (14) abut against each other.

3. The air-conditioning valve body adopting an improved fluorine injection nozzle nut according to claim 1, characterized in that, The outside of the fluorine injection nozzle nut (2) is protruded and provided with a plurality of horizontal stripes (25) arranged in parallel and at equal intervals.

4. The air-conditioning valve body adopting an improved fluorine injection nozzle nut according to claim 1, characterized in that, The closed mounting end (21) is provided with a mounting portion (26) facing outward, and a mounting groove (27) is provided at the center of the mounting portion (26).

5. An air-conditioning valve body using an improved fluorine injection nozzle nut according to claim 4, characterized in that, The external shape of the mounting portion (26) and the internal shape of the mounting groove (27) are both polygonal.

6. The air-conditioning valve body adopting an improved fluorine injection nozzle nut according to claim 1, characterized in that The closed installation end (21) is provided with a space-avoiding groove (28) inwardly; When the fluorine injection nozzle nut (2) is installed on the valve body (1), the air avoidance groove (28) is arranged opposite to the valve core (3) inside the fluorine injection section (11).

7. An air-conditioning valve body using an improved fluorine injection nozzle nut according to claim 1, characterized in that, The fluorine injection nozzle nut (2) is made of plastic material.

8. An air-conditioning valve body adopting an improved fluorine injection nozzle nut according to claim 7, characterized in that, The fluorine injection nozzle nut (2) is made of red plastic material.

9. The air-conditioning valve body adopting an improved fluorine injection nozzle nut according to claim 1, wherein, One end of the valve body (1) is a control port (10), and the other end of the valve body (1) is a fixed closed end (15); The external thread of the control port (10) is connected with an upper cover nut (4); The interior of the valve body (1) is divided into an air inlet area and an air outlet area in sequence from one end of the control port (10) to the fixed closed end (15); The air intake area is connected with an air intake section (16) and the fluorine injection section (11); the opening of the air intake section (16) is an air intake port (160); and the air intake port (160) is threadedly connected with a protective nut (5); The air outlet area is communicated with an air outlet section (17). The opening of the air outlet section (17) is an air outlet (170). The air outlet (170) is connected with a connecting pipe (6), and the connecting pipe (6) is used for communicating with an external air conditioning system; A stop valve core (7) is internally threadedly connected to the intake section (16). The stop valve core (7) can move along the intake area, and the movement of the stop valve core (7) is used to open or close the fluorine injection nozzle (110) and the intake port (160).

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