Safety interface for air conditioner fluorination
The modular AC refrigerant charging interface with integrated pressure control and air evacuation features addresses backflow issues, ensuring pure refrigerant transfer and stable system pressure, improving AC performance and safety with reduced maintenance costs.
Patent Information
- Application Number
- CN202422524556.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-18
AI Technical Summary
There is a poor control of instantaneous air pressure difference during fluorine addition of existing air conditioners, which leads to air return, moisture and impurities entering the system, affecting the refrigeration effect, the fluorine gas concentration drops, the pressure is unstable, and safety hazards are increased. In addition, the maintenance of integrated valves is complex and expensive, and resources are seriously wasted.
The safety interface adopts a multi-stage removable structure, including a reverse-reverse connector, a sliding valve, a sealing ring and an air exhaust structure, combined with threaded connections and sealing tapes, realizes a gas sealing and detachable modular design, controls the air pressure difference and removes air, and is equipped with a pressure gauge to monitor the amount of fluorine added.
Significantly improve refrigeration efficiency and system stability, reduce maintenance costs, extend equipment life, and ensure the safety and reliability of fluoride addition process.
Smart Images
Figure CN223105362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air conditioner maintenance, in particular to a safety interface for adding refrigerant to an air conditioner. Background Art
[0002] In the maintenance and servicing of air conditioners, regularly adding refrigerant is an important step to ensure their efficient operation. To ensure the safety and accuracy of this process, using a special safety interface to connect the air conditioner and the refrigerant cylinder is an essential measure. These safety interfaces are designed to ensure that during the refrigerant addition process, the refrigerant can be safely and accurately transferred from the refrigerant cylinder to the air conditioner system. By correctly connecting one end of the air conditioner and both ends of the refrigerant cylinder and controlling the amount of added refrigerant through a valve, the safety interface can effectively monitor pressure changes, ensuring that the entire operation process is both safe and efficient. This technology not only protects operators from potential hazards but also ensures the long-term stable operation of the equipment.
[0003] In the prior art, there are some significant defects during the process of adding refrigerant to an air conditioner. These defects mainly focus on the control problem of the instantaneous pressure difference. When the refrigerant cylinder is connected to the air conditioner system, due to the existence of the instantaneous pressure difference, air often flows back into the refrigerant cylinder. This phenomenon can cause various problems. First, moisture and impurities in the air enter the system, affecting the refrigeration effect. Second, the backflow of air reduces the concentration of fluorine gas, resulting in poor refrigerant addition effect. Third, it may cause unstable pressure in the refrigerant addition system, posing a safety hazard. A series of problems not only reduce the service life of the air conditioner but also increase the maintenance cost. Content of the Utility Model
[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a safety interface for adding refrigerant to an air conditioner is proposed.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A safety interface for adding refrigerant to an air conditioner, including a refrigerant addition valve body. One side of the refrigerant addition valve body is connected and fixed with an air conditioner refrigerant addition connection port. The other side of the refrigerant addition valve body is connected and fixed with a refrigerant cylinder connection port. A reverse flow prevention connecting part is threadedly connected to one side of the refrigerant cylinder connection port. A reverse flow prevention valve body is threadedly connected to one side of the reverse flow prevention connecting part. A sliding valve is slidably connected inside the reverse flow prevention valve body. A sealing ring is fixed to one side of the sliding valve. An air groove is opened at the bottom of the sliding valve. An air inlet hole is penetrated through the inner wall of the air groove. A limiting ring is fixed inside the reverse flow prevention valve body. A spring is fixed to one side of the sliding valve, and the other end of the spring is fixed to the inner wall of the reverse flow prevention valve body.
[0006] Preferably, a fluorination inlet groove is communicated and opened inside the fluorination valve body, a fluorination outlet groove is communicated and opened inside the fluorination valve body, a first valve member is threadedly connected to the inner wall of the fluorination valve body, a second valve member is threadedly connected to the inner wall of the first valve member, a fluorination screw rod is threadedly connected to the inner wall of the second valve member, a first sealing member is fixed to the top of the fluorination screw rod, and a fluorination control valve is fixed to the bottom of the fluorination screw rod. In the prior art, fluorination valves often adopt an integrated design. After long-term use, this design is prone to internal damage. However, due to its integrated structure, the maintenance process becomes extremely complex and expensive. Once the components inside the valve are damaged, the entire valve often needs to be replaced as a whole. This not only increases the maintenance cost but also causes waste of resources. In addition, due to the complex internal structure of the valve, it is difficult for traditional detection means to accurately locate the problem, further increasing the difficulty and time cost of maintenance. To address such problems, the present utility model adopts a multi-section detachable structure. In this structure, sealing tapes are provided inside all threaded connections. When performing fluorination operations, after correctly connecting both ends to the air conditioner and the fluorination tank, rotate the fluorination control valve. Since the fluorination screw rod is threadedly connected to the second valve member, the fluorination screw rod drives the first sealing member to descend and make contact for sealing. The fluorination rate can be controlled by the descending amplitude. Since the first valve member is threadedly connected to the fluorination valve body, the second valve member is threadedly connected to the first valve member, and the fluorination screw rod is threadedly connected to the second valve member, when a failure occurs at a certain position, maintenance or replacement operations can be easily carried out, achieving the effect of decomposing each functional part of the valve into independent modules, and each module can be individually disassembled and replaced. In this way, once a component inside the valve is damaged, only the corresponding module needs to be replaced, without replacing the entire valve as a whole. This not only greatly reduces the maintenance cost but also reduces waste of resources. At the same time, due to the modular design, the internal structure of the valve is clearer, facilitating detection and positioning of problems, thereby further reducing the difficulty and time cost of maintenance.
[0007] Preferably, an air vent hole is communicated and opened at the top of the fluorination valve body. An air inlet first end is communicated and opened inside the fluorination valve body. An air exhaust screw rod is threadedly connected inside the fluorination valve body. A second seal is fixed at the top of the air exhaust screw rod. An air exhaust valve is fixed at the bottom of the air exhaust screw rod. In the prior art, if the air exhaust operation is not carried out before air-conditioning fluorination, a series of problems will occur. The air contains components such as oxygen and nitrogen. After these gases are mixed into the refrigeration system, the refrigeration efficiency of the system will be reduced. Specifically, the presence of air will increase the working load of the compressor, resulting in increased energy consumption. At the same time, it will also accelerate the wear of the equipment and shorten the service life of the equipment. In addition, the moisture in the air will condense into ice at low temperatures, which may block the pipeline or damage the valve, affecting the normal operation of the system. To solve such problems, the present utility model adopts an air exhaust structure. After being correctly connected to the end connected to the air conditioner, since the threaded connections are all sealed with sealing tape, before the fluorination operation of the air conditioner, turn the air exhaust valve to loosen the valve, and discharge the gas in the channel through the air vent hole. After appropriately discharging the air, turn the air exhaust valve again to block the bottom end of the air vent hole, effectively avoiding the mixing of air and moisture into the refrigeration system, thereby significantly improving the refrigeration efficiency of the system. Specifically, this can reduce the working load of the compressor, lower the energy consumption, and extend the service life of the equipment. At the same time, it prevents the moisture in the air from condensing into ice, avoiding blocking the pipeline or damaging the valve, and ensuring the normal operation of the system.
[0008] Preferably, anti-blocking holes are arrayed on the surface of the limit ring. The anti-blocking holes on the surface of the limit ring can effectively ensure that during the fluorination process, when the air pressure at the end connected to the fluorination tank is too large, the sliding valve is pushed to be in full contact with the limit ring, resulting in the inability of the gas to flow smoothly, achieving the effect of ensuring that the fluorination process is not interrupted and improving the working efficiency.
[0009] Preferably, a pressure gauge is communicated and provided at the top of the fluorination valve body. The pressure gauge is communicated with the inside. When the fluid acts on the measuring element inside the pressure gauge, a force proportional to the pressure will be generated. This force will cause the measuring element to deform. By measuring this deformation, the pressure value of the fluid can be indirectly obtained, achieving the effect of being able to measure the fluorination amount by judging the pressure.
[0010] Preferably, the pressure gauge is threadedly connected to the fluorination valve body. The threaded connection between the pressure gauge and the fluorination valve body enables more convenient replacement of the pressure gauge when it is damaged. At the same time, the sealing tape at the threaded connection can ensure airtightness.
[0011] Preferably, an air connection thread is provided on the inner wall of the air-conditioning fluorine adding connection port, and a fluorine adding connection thread is provided inside the check valve body. The threaded connection ports provided at both ends can ensure the convenience of connection during the fluorine adding operation. At the same time, when both ends are damaged, the threaded connection can ensure more convenient replacement. The sealing tape used at the threaded connection can ensure the airtightness inside.
[0012] Beneficial effects:
[0013] 1. In the prior art, there are some significant defects in the process of adding fluorine to an air conditioner. These defects are mainly concentrated in the control problem of the instantaneous air pressure difference. When the fluorine gas cylinder is connected to the air-conditioning system, due to the existence of the instantaneous air pressure difference, air often flows back into the fluorine adding tank. This phenomenon can cause various problems. First, moisture and impurities in the air enter the system, affecting the refrigeration effect. Second, the air backflow reduces the concentration of fluorine gas, resulting in poor fluorine adding effect. Third, it may cause unstable pressure in the fluorine adding system, posing a safety hazard. A series of problems not only reduce the service life of the air conditioner but also increase the maintenance cost. In view of such problems, the present utility model adopts a flow blocking structure to significantly improve the refrigeration effect and stability of the air-conditioning system, prevent moisture and impurities in the air from entering the system, ensure the purity and concentration of freon, thereby extending the service life of the air conditioner and reducing the maintenance cost. At the same time, by controlling the instantaneous air pressure difference, air backflow can be prevented, the pressure inside the system can be kept stable, potential safety hazards can be eliminated, and the safety and reliability of the overall operation can be improved.
[0014] 2. In the prior art, the fluorine adding valve often adopts an integrated design. After long-term use, internal damage is likely to occur. However, due to its integrated structure, the maintenance process becomes extremely complex and expensive. Once the internal components of the valve are damaged, the entire valve often needs to be replaced as a whole, which not only increases the maintenance cost but also causes waste of resources. In addition, due to the complex internal structure of the valve, it is difficult for traditional detection means to accurately locate the problem, further increasing the difficulty and time cost of maintenance. In view of such problems, the present utility model adopts a multi-section detachable structure to decompose each functional part of the valve into independent modules, and each module can be detached and replaced separately. In this way, once a certain component inside the valve is damaged, only the corresponding module needs to be replaced, without replacing the entire valve as a whole. This not only greatly reduces the maintenance cost but also reduces the waste of resources. At the same time, due to the modular design, the internal structure of the valve is clearer, facilitating the detection and location of problems, thereby further reducing the difficulty and time cost of maintenance.
[0015] 3. In the prior art, if the air exhausting operation is not carried out before adding refrigerant to the air conditioner, a series of problems will occur. The air contains components such as oxygen and nitrogen. After these gases are mixed into the refrigeration system, the refrigeration efficiency of the system will be reduced. Specifically, the presence of air will increase the working load of the compressor, resulting in increased energy consumption. At the same time, it will also accelerate the wear of the equipment and shorten the service life of the equipment. In addition, the moisture in the air will condense into ice at low temperatures, which may block the pipeline or damage the valve, affecting the normal operation of the system. In view of such problems, the present utility model adopts an air exhausting structure to effectively avoid the mixing of air and moisture into the refrigeration system, thereby significantly improving the refrigeration efficiency of the system. Specifically, this can reduce the working load of the compressor, lower the energy consumption, and extend the service life of the equipment. At the same time, it can prevent the moisture in the air from condensing into ice, avoid blocking the pipeline or damaging the valve, and ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0017] Figure 2 is a cross-sectional view of the refrigerant adding safety interface of the present utility model;
[0018] Figure 3 is Figure 2 an enlarged view of part A in
[0019] Figure 4 is Figure 2 an enlarged view of part B in
[0020] Legend:
[0021] 1. Refrigerant adding valve body; 101. Air conditioner refrigerant adding connection port; 102. Refrigerant tank connection port; 103. Pressure gauge; 104. Refrigerant adding inlet groove; 105. Refrigerant adding outlet groove; 106. First valve member; 107. Second valve member; 108. Refrigerant adding screw rod; 109. First seal; 110. Air exhausting hole; 111. Inlet end; 112. Air exhausting screw rod; 113. Air connection thread; 114. Reverse blocking connection member; 115. Second seal; 116. Air exhausting valve; 117. Refrigerant adding control valve; 2. Reverse blocking valve body; 201. Slide valve; 202. Sealing ring; 203. Air groove; 204. Air inlet hole; 205. Spring; 206. Limit ring; 207. Anti-blocking hole; 208. Refrigerant adding connection thread. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments and the accompanying drawings. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.
[0023] The specific embodiments of the present utility model will be described below in conjunction with the accompanying drawings. Specific embodiments:
[0025] Referring to Figures 1-4 , a safety interface for air conditioner fluorination, including a fluorination valve body 1. One side of the fluorination valve body 1 is connected and fixed with an air conditioner fluorination connection port 101, and the other side of the fluorination valve body 1 is connected and fixed with a fluorination tank connection port 102. A reverse flow prevention connector 114 is threadedly connected to one side of the fluorination tank connection port 102, and a reverse flow prevention valve body 2 is threadedly connected to one side of the reverse flow prevention connector 114. A sliding valve 201 is slidably connected inside the reverse flow prevention valve body 2. A sealing ring 202 is fixed to one side of the sliding valve 201. An air groove 203 is opened at the bottom of the sliding valve 201, and an air inlet hole 204 is penetrated through the inner wall of the air groove 203. A limiting ring 206 is fixed inside the reverse flow prevention valve body 2. A spring 205 is fixed to one side of the sliding valve 201, and the other end of the spring 205 is fixed to the inner wall of the reverse flow prevention valve body 2. In the prior art, there are some significant defects in the process of fluorinating an air conditioner. These defects mainly focus on the control problem of instantaneous air pressure difference. When the fluorine gas cylinder is connected to the air conditioner system, due to the existence of instantaneous air pressure difference, air often flows back into the fluorination tank. This phenomenon will cause various problems. One is that moisture and impurities in the air enter the system, affecting the refrigeration effect; the second is that the air backflow reduces the concentration of fluorine gas, resulting in poor fluorination effect; the third is that it may cause unstable pressure in the fluorination system, posing a safety hazard. A series of problems not only reduce the service life of the air conditioner but also increase the maintenance cost. In view of such problems, the present utility model adopts a flow resistance structure. Gas seals are used at all threaded connections of this structure. When correctly connected to the fluorination tank, the fluorination tank opens the valve, and the gas enters the air groove 203 to push the sliding valve 201 to slide, so that the sealing ring 202 leaves the groove, and the air inlet hole 204 is no longer restricted by the inner wall for gas outflow. At this time, the spring 205 is pushed, so that the air pressure decreases after the fluorination is completed, and the sliding valve 201 returns to the sealed position under the rebound of the spring 205, making the gas near the spring side unable to pass through the sliding valve 201, realizing the prevention of gas backflow.
[0026] The inside of the fluorination valve body 1 is connected and provided with a fluorination inlet groove 104, and the inside of the fluorination valve body 1 is connected and provided with a fluorination outlet groove 105. The inner wall of the fluorination valve body 1 is threadedly connected with a first valve member 106, the inner wall of the first valve member 106 is threadedly connected with a second valve member 107, the inner wall of the second valve member 107 is threadedly connected with a fluorination screw rod 108, the top of the fluorination screw rod 108 is fixed with a first sealing member 109, and the bottom of the fluorination screw rod 108 is fixed with a fluorination control valve 117. In the prior art, fluorination valves often adopt an integrated design. After long-term use, this design is prone to internal damage. However, due to its integrated structure, the maintenance process becomes extremely complex and expensive. Once the components inside the valve are damaged, it is often necessary to replace the entire valve as a whole, which not only increases the maintenance cost but also causes waste of resources. In addition, due to the complex internal structure of the valve, it is difficult for traditional detection means to accurately locate the problem, further increasing the difficulty and time cost of maintenance. To address such problems, the present utility model adopts a multi-section detachable structure. In this structure, sealing tapes are provided inside all threaded connections. When performing fluorination operations, after correctly connecting both ends to the air conditioner and the fluorination tank, rotate the fluorination control valve 117. Since the fluorination screw rod 108 is threadedly connected to the second valve member 107, the fluorination screw rod 108 drives the first sealing member 109 to descend and make contact seals. The fluorination rate can be controlled by the descending amplitude. Since the first valve member 106 is threadedly connected to the fluorination valve body 1, the second valve member 107 is threadedly connected to the first valve member 106, and the fluorination screw rod 108 is threadedly connected to the second valve member 107, when a failure occurs at a certain position, maintenance or replacement operations can be easily carried out.
[0027] The top of the fluorination valve body 1 is connected and provided with an air vent hole 110, the inside of the fluorination valve body 1 is connected and provided with the first end of an air inlet 111, the inside of the fluorination valve body 1 is threadedly connected with an air vent screw rod 112, the top of the air vent screw rod 112 is fixed with a second sealing member 115, and the bottom of the air vent screw rod 112 is fixed with an air vent valve 116. In the prior art, if no air vent operation is performed before fluorinating an air conditioner, a series of problems will occur. The air contains components such as oxygen and nitrogen. After these gases mix into the refrigeration system, the refrigeration efficiency of the system will be reduced. Specifically, the presence of air will increase the working load of the compressor, resulting in increased energy consumption. At the same time, it will also accelerate the wear of the equipment and shorten the service life of the equipment. In addition, the moisture in the air will condense into ice at low temperatures, which may block the pipeline or damage the valve, affecting the normal operation of the system. To address such problems, the present utility model adopts an air vent structure. After correctly connecting the end connected to the air conditioner, at this time, since the threaded connections are all sealed with sealing tapes, before performing the fluorination operation on the air conditioner, rotate the air vent valve 116 to loosen the valve, and discharge the gas in the channel through the air vent hole 110. After appropriately discharging the air, rotate the air vent valve 116 again to block the bottom end of the air vent hole 110.
[0028] The surface of the limit ring 206 is provided with an array of anti-blocking holes 207. The anti-blocking holes 207 on the surface of the limit ring 206 can effectively ensure that during the fluorination process, the air pressure at one end connected to the fluorination tank is too high, causing the sliding valve 201 to be pushed to completely contact the limit ring 206, resulting in the inability of the gas to flow smoothly, thereby ensuring that the fluorination process is not interrupted and improving the work efficiency. A pressure gauge 103 is connected to the top of the fluorination valve body 1. The pressure gauge 103 is connected to the inside. When the fluid acts on the measuring element inside the pressure gauge 103, a force proportional to the pressure is generated. This force causes the measuring element to deform. By measuring this deformation, the pressure value of the fluid can be indirectly obtained, achieving the effect of being able to measure the amount of fluorination by judging the pressure. The pressure gauge 103 is threadedly connected to the fluorination valve body 1. The threaded connection between the pressure gauge 103 and the fluorination valve body 1 allows the pressure gauge to be replaced more conveniently when it is damaged. At the same time, the sealing tape at the threaded connection can ensure air tightness. The inner wall of the air conditioning fluorine filling connection port 101 is provided with an air connection thread 113, and the inner side of the anti-return valve body 2 is provided with a fluorine filling connection thread 208. The threaded connection ports at both ends can ensure the convenience of connection during the fluorine filling operation. At the same time, when the two ends are damaged, the threaded connection can ensure that they are more convenient to replace. The sealing tape used at the threaded connection can ensure the air tightness inside.
[0029] The working principle of the utility model is as follows: after being correctly connected with the fluorine adding tank, the valve of the fluorine adding tank is opened, and the gas enters the gas groove 203, pushing the sliding valve 201 to slide, so that the sealing ring 202 leaves the groove, and the gas inlet 204 is no longer restricted by the inner wall to flow out of the gas. At this time, the spring 205 is pushed, so that the air pressure is reduced after the fluorine addition is completed, and the sliding valve 201 returns to the sealing position under the rebound of the spring 205 to prevent the gas from flowing back. When the fluorine addition operation is performed, after the two ends are correctly connected with the air conditioner and the fluorine adding tank, the fluorine addition control valve 117 is rotated. Since the fluorine addition screw rod 108 is threadedly connected with the second valve component 107, the fluorine addition screw rod 108 drives the first sealing component 109 to descend and contact the seal, and the fluorine addition rate can be controlled by the descending amplitude. The first valve component 106 is threadedly connected with the fluorine addition valve body 1, the second valve component 107 is threadedly connected with the first valve component 106, and the fluorine addition screw rod 108 is threadedly connected with the second valve component 107, so that it can be easily maintained or replaced in case of failure. After being correctly connected with one end of the air conditioner, the threaded connection is sealed with a sealing tape. Before adding fluorine to the air conditioner, turn the exhaust valve 116 to loosen the valve, and exhaust the gas in the channel through the exhaust hole 110. After the air is properly exhausted, turn the exhaust valve 116 again to block the bottom of the exhaust hole 110.
[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.
[0031] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A safety interface for air conditioner fluorination, comprising a fluorination valve body (1), one side of the fluorination valve body (1) is connected and fixed with an air conditioner fluorination connection port (101), and the other side of the fluorination valve body (1) is connected and fixed with a fluorination tank connection port (102), characterized in that: One side of the fluorine adding tank connection port (102) is threadedly connected with a reverse flow prevention connector (114). One side of the reverse flow prevention connector (114) is threadedly connected with a reverse flow prevention valve body (2). A sliding valve (201) is slidably connected inside the reverse flow prevention valve body (2). A sealing ring (202) is fixed on one side of the sliding valve (201). An air groove (203) is formed at the bottom of the sliding valve (201). An air inlet hole (204) is formed through the inner wall of the air groove (203). A limiting ring (206) is fixed inside the reverse flow prevention valve body (2). A spring (205) is fixed on one side of the sliding valve (201), and the other end of the spring (205) is fixed on the inner wall of the reverse flow prevention valve body (2).
2. The safety interface for air conditioner fluorination according to claim 1, characterized in that: A fluorine adding inlet groove (104) is communicated and formed inside the fluorine adding valve body (1). A fluorine adding outlet groove (105) is communicated and formed inside the fluorine adding valve body (1). A first valve member (106) is threadedly connected to the inner wall of the fluorine adding valve body (1). A second valve member (107) is threadedly connected to the inner wall of the first valve member (106). A fluorine adding screw rod (108) is threadedly connected to the inner wall of the second valve member (107). A first sealing member (109) is fixed at the top of the fluorine adding screw rod (108). A fluorine adding control valve (117) is fixed at the bottom of the fluorine adding screw rod (108).
3. The safety interface for adding refrigerant to an air conditioner according to claim 1, characterized in that: An air exhaust hole (110) is communicated and formed at the top of the fluorine adding valve body (1). An air inlet port head (111) is communicated and formed inside the fluorine adding valve body (1). An air exhaust screw rod (112) is threadedly connected inside the fluorine adding valve body (1). A second sealing member (115) is fixed at the top of the air exhaust screw rod (112). An air exhaust valve (116) is fixed at the bottom of the air exhaust screw rod (112).
4. The safety interface for adding refrigerant to an air conditioner according to claim 1, characterized in that: Anti-blocking holes (207) are formed in an array on the surface of the limiting ring (206).
5. The safety interface for adding refrigerant to an air conditioner according to claim 2, characterized in that: A pressure gauge (103) is communicated and provided at the top of the fluorine adding valve body (1).
6. The safety interface for air conditioner fluorination according to claim 5, characterized in that: The pressure gauge (103) is threadedly connected to the fluorine adding valve body (1).
7. The safety interface for adding refrigerant to an air conditioner according to claim 1, characterized in that: Air connection threads (113) are formed on the inner wall of the air conditioner fluorine adding connection port (101), and fluorine adding connection threads (208) are formed inside the reverse flow prevention valve body (2).