Refrigerant filling device

Abstract

The utility model discloses a refrigerant filling device which comprises an input connector connected with a refrigerant storage tank, an output connector connected with an equipment host, a guide pipe communicated with the input connector and the output connector, a three-way valve connected to the guide pipe and a pressure gauge communicated with the three-way valve. The input connector is provided with a rotary switch; the output connector is of a nested structure of a rotary connector and a fixed connector, the fixed connector is inserted into the inner wall of the guide pipe, the outer side of the connecting section of the guide pipe and the fixed connector is sleeved with a fixing ring, the other end of the fixed connector is connected with the rotary connector, and the front end of the rotary connector is provided with threads and a protruding block connected with an equipment host. The inner sides of the rotary connector and the fixed connector are provided with air channels which penetrate through the two sides of the protruding block and communicate with the outside, the air channels communicate with the guide pipe, and the sealing performance of the refrigerant filling tool is improved through pressurization of the fixing ring, a nested structure and the like; the convenience is enhanced by a rotary joint and the like; and the nesting structure and the fixing ring improve the connection stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigerant filling tool technical field, concretely is a kind of filling device of refrigerant. BACKGROUND

[0002] In the refrigeration, air conditioning and related fields, refrigerant filling operation is one of the key links to maintain the normal operation of equipment, Freon or other similar refrigerants are indispensable working media in these systems, which are responsible for circulating in the system to realize heat transfer and conversion;However, the refrigerant filling process is not simply pouring refrigerant into the system, it requires high sealing and safety of operation to prevent refrigerant leakage and possible harm to the environment or operating personnel.

[0003] Poor sealing: the joint and valve of part of refrigerant filling tools are not designed precisely enough, leading to refrigerant leakage during connection and disconnection, which may also pollute the environment and increase the risk of harmful substances for operating personnel.

[0004] Insufficient operation safety: during the refrigerant filling process, if pressure control is improper or operation is wrong, it may cause excessive refrigerant pressure, leading to equipment damage or safety accidents.

[0005] In view of the above shortcomings, there is an urgent need for a refrigerant filling tool with good sealing and safety in the market. Such a tool should have the following characteristics: high-precision sealing joint and valve design to ensure no refrigerant leakage during connection and disconnection;Built-in pressure monitoring and control mechanism to monitor refrigerant pressure in real time and automatically adjust to prevent safety accidents caused by excessive pressure;Simple and easy-to-use design to reduce operation difficulty and cost;And good compatibility to adapt to various types and specifications of refrigerants and equipment. SUMMARY

[0006] To overcome the shortcomings of the prior art, the utility model provides a kind of filling device of refrigerant, can effectively solve the problem of ensuring the poor sealing and insufficient operation safety of refrigerant filling process proposed in background art.

[0007] The technical scheme adopted by the utility model to solve its technical problems is: a kind of filling device of refrigerant, including the input connecting head of connecting refrigerant storage tank, the output connecting head of connecting equipment host computer, the guide pipe of intercommunication input connecting head and output connecting head, three-way valve connected on guide pipe, the pressure gauge communicated on three-way valve;

[0008] The input connecting head is provided with rotary switch;

[0009] The output connector is a nested structure of a rotating connector and a fixed connector, the fixed connector is inserted into the inner wall of the conduit, the outer side of the conduit and the connecting section of the fixed connector is sleeved with a fixed ring, the other end of the fixed connector is connected with the rotating connector, the front end of the rotating connector is provided with a thread and a protruding block connected with the main machine of the equipment, the inner side of the rotating connector and the fixed connector is provided with an air channel penetrating to the both sides of the protruding block and communicating with the outside, and the air channel communicates with the conduit.

[0010] Further, the conduit is a transparent hose.

[0011] Further, the fixed connector is provided with a three-section integrally formed sealing ring.

[0012] Further, the upper end of the input connector is connected with a rotatingly connected elbow, and the other end of the elbow is connected with the inner side of the conduit.

[0013] Further, the outer side of the connecting section of the conduit and the elbow is provided with a fixed ring.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The sealing property is improved, and the refrigerant leakage is prevented.

[0016] The fixed ring sleeved with the outer side of the connecting section of the conduit and the fixed connector pressurizes the conduit, so that the connection between the conduit and the fixed connector is more compact, the refrigerant leakage from the connecting section of the conduit and the fixed connector is prevented, and the sealing property during the refrigerant filling process is ensured.

[0017] The output connector adopts the nested structure of the rotating connector and the fixed connector, the structure design makes the cooperation between the two connectors more compact, and the possibility of refrigerant leakage is reduced. Meanwhile, the air channel arranged in the inner side of the rotating connector and the fixed connector communicates with the outside, but during the normal refrigerant filling process, the refrigerant cannot leak to the outside from the air channel due to the good sealing, and the refrigerant can be smoothly transmitted to the main machine of the equipment along the conduit.

[0018] The operation convenience is enhanced, and the work efficiency is improved.

[0019] The front end of the rotating connector is provided with a thread and a protruding block connected with the main machine of the equipment, the design makes the rotating connector can be conveniently connected and detached with the main machine of the equipment. The operator only needs to align the rotating connector with the access point of the main machine of the equipment, and the connection can be completed by rotating, without complex tools and operation skills, so that the connection time is greatly saved, and the work efficiency is improved.

[0020] The rotation switch of the input connector is set, and the operator can accurately control the flow of the refrigerant according to needs. During the refrigerant filling process, the entering speed of the refrigerant can be conveniently adjusted by rotating the rotation switch, so that the conditions of excessive or insufficient refrigerant are avoided, and the refrigerant filling operation is more accurate and convenient.

[0021] Improve connection stability and adapt to different working conditions

[0022] The nested structure of the rotary joint and the fixed joint makes the connection of the output connector and the conduit more stable. This structure can withstand certain external forces and vibrations, and is not easy to loosen or fall off, ensuring the reliability of the connection during the refrigerant filling process.

[0023] The fixed ring not only seals the conduit under pressure, but also disperses the stress at the connection between the conduit and the fixed joint. When the conduit is subjected to external force pulling or thermal expansion and contraction, the fixed ring can disperse the stress to the surrounding, reduce the stress concentration at the connection, prevent the connection from being damaged due to excessive stress, and improve the stability and durability of the connection. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural perspective view of the present application;

[0025] Figure 2 It is a structural sectional view of the present application;

[0026] Figure 3 It is Figure 2 It is a structure enlarged view of A.

[0027] Reference numerals in the drawings:

[0028] 1 - input connector, 2 - conduit, 3 - pressure gauge, 4 - output connector, 5 - three-way valve, 11 - rotation switch, 41 - rotary joint, 42 - fixed joint, 43 - fixed ring, 44 - thread, 45 - protruding block, 46 - airway, 47 - sealing ring. DETAILED DESCRIPTION

[0029] The embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0030] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. Example

[0031] like Figures 1-3 As shown, this utility model provides a refrigerant charging device, including an input connector 1 connected to a refrigerant storage tank, an output connector 4 connected to the main unit of the equipment, a conduit 2 connecting the input connector 1 and the output connector 4, a three-way valve 5 connected to the conduit 2, and a pressure gauge 3 connected to the three-way valve 5.

[0032] Input connector 1 is equipped with a rotary switch 11;

[0033] The output connector 4 is a nested structure of a rotary connector 41 and a fixed connector 42. The fixed connector 42 is inserted into the inner wall of the conduit 2. A fixing ring 43 is sleeved on the outer side of the connection section between the conduit 2 and the fixed connector 42. The fixing ring 43 pressurizes the conduit 2 to make it more tightly connected to the fixed connector 42. The other end of the fixed connector 42 is connected to the rotary connector 41. The front end of the rotary connector 41 is provided with a thread 44 and a protrusion 45 that connects to the main unit of the equipment. An air passage 46 is provided on the inner side of the rotary connector 41 and the fixed connector 42, which extends to both sides of the protrusion 45 and communicates with the outside. The air passage 46 is connected to the conduit 2.

[0034] Rotary switch 11 control: The rotary switch 11 set in the input connector 1 can easily control the connection or disconnection between the refrigerant storage tank and the conduit 2. During refrigerant charging operations, the connection between the refrigerant storage tank and the refrigerant charging tool can be accurately opened or closed, preventing refrigerant leakage at inappropriate times and improving the safety and controllability of the refrigerant charging operation.

[0035] The design of the rotary joint 41 ensures stability when the refrigerant charging tool is connected to the main unit of the equipment. Operators can rotate the rotary joint 41 to adjust its angle according to actual connection requirements, thereby improving the success rate of the connection and facilitating better alignment with the interface on the main unit.

[0036] The fixed joint 42 is inserted into the inner wall of the conduit 2, and the fixed ring 43 on the outside is pressed to make the conduit 2 and the fixed joint 42 more closely connected, effectively preventing the leakage of refrigerant from the connection between the conduit 2 and the fixed joint 42 during transmission, and ensuring the sealing and stability of the refrigerant filling process.

[0037] The threads 44 and the protruding blocks 45 at the front end of the rotary joint 41 facilitate secure connection with the device host. The threads 44 provide better sealing and connection strength, and the protruding blocks 45 are used to lift the valve of the device host connection port to make the gas path connected, further ensuring the smooth progress of the refrigerant filling operation.

[0038] The air duct 46 inside the rotary joint 41 and the fixed joint 42 is connected to the outside through the protruding blocks 45 on both sides and is connected to the conduit 2, which ensures that the refrigerant can be smoothly transmitted from the conduit 2 to the device host.

[0039] The cooperation of the three-way valve 5 and the pressure gauge 3 connected to the conduit 2 can realize the observation of the flow direction and flow rate of the refrigerant. During the refrigerant filling process, the flow rate of the refrigerant can be observed to adapt to the refrigerant filling needs of different device hosts, and the pressure gauge 3 can display the pressure in real time during the refrigerant filling process. The operator can accurately grasp the pressure state of the refrigerant filling according to the reading of the pressure gauge 3, avoid damage to the device host caused by excessive or insufficient pressure, and ensure that the refrigerant filling operation is carried out in a safe and appropriate pressure range.

[0040] The conduit 2 serves as a channel connecting the input connector 1 and the output connector 4, providing a path for the transmission of refrigerant, enabling the entire refrigerant filling tool to form a complete refrigerant transmission system, and safely and effectively transporting the refrigerant in the refrigerant storage tank to the device host.

[0041] Among them, the conduit 2 is a transparent flexible tube.

[0042] During the refrigerant filling operation, the operator can directly observe the flow of the refrigerant in the conduit 2 through the transparent flexible tube. It can be clearly seen whether the refrigerant is flowing normally, the speed of the flow, etc. If the refrigerant flow is not smooth, it may mean that the conduit 2 is blocked or has other problems, and the operator can discover and take appropriate measures in time.

[0043] The transparent flexible tube allows the operator to directly observe whether there are signs of refrigerant leakage in the conduit 2. If there is leakage somewhere in the conduit 2, it will show signs of refrigerant escaping on the transparent flexible tube, such as mist, bubbles, etc. Once the leakage is found, the operator can immediately stop the refrigerant filling operation, check and repair the leakage point, prevent further leakage of the refrigerant, and ensure the safety and effectiveness of the refrigerant filling operation.

[0044] During long-term use, impurities may accumulate in the conduit 2. The transparent hose facilitates the operator to observe whether there are impurities in the conduit 2, and the type and distribution of the impurities. If the impurities are too much, they may affect the flow and quality of the refrigerant, and the operator can clean or replace the conduit 2 according to the situation. Timely discovery and treatment of problems in the conduit 2, such as leakage and blockage, can avoid damage to the host equipment caused by these problems. The transparent hose helps to ensure that the refrigerant filling operation is carried out in a safe and reliable manner, ensuring the normal operation and service life of the host equipment.

[0045] Referring to Figure 3 , the fixed joint 42 is provided with a three-section integrally formed sealing ring 47.

[0046] The three-section integrally formed sealing ring 47 forms a multi-layer sealing structure. Each section of the sealing ring 47 can block the leakage of refrigerant to a certain extent, and the multi-layer sealing cooperates with each other to greatly increase the reliability of the sealing. Even if one of the layers has a slight risk of leakage, the other layers can continue to play a sealing role, effectively preventing refrigerant from leaking from the connection between the fixed joint 42 and the conduit 2 to the outside environment.

[0047] The presence of the sealing ring 47 increases the friction between the fixed joint 42 and the conduit 2. The three-section sealing ring 47 is in close contact with the inner wall of the conduit 2, making the fixed joint 42 more stable in the conduit 2 and less likely to loosen. During the refrigerant filling process, the vibration or movement of the equipment may cause the connection to loosen, and the friction of the sealing ring 47 can effectively prevent this from happening, ensuring the continuity and stability of the refrigerant filling operation.

[0048] Referring to Figure 1 and Figure 2 , the upper end of the input connector 1 is connected with a swivel joint elbow, and the other end of the elbow is connected with the inner side of the conduit 2.

[0049] In actual refrigerant filling operations, the installation space of the refrigerant filling tool may be limited, such as the presence of other components or obstacles around the equipment, preventing the refrigerant storage tank from being directly connected with the input connector 1 in a straight line. The swivel joint elbow can adjust the angle according to the actual situation, allowing the refrigerant storage tank to be connected with the input connector 1 at a suitable angle, avoiding the refrigerant filling operation due to space limitations.

[0050] Referring to Figure 1 and Figure 2 , the outer side of the section of the conduit 2 connected with the elbow is provided with a fixing ring 43, which pressurizes the conduit 2 to make it more closely connected with the elbow.

[0051] During the refrigerant filling process, the fixed ring 43 pressurizes the conduit 2, so that the contact between the conduit 2 and the elbow is more closely, the gap between them is reduced, thereby effectively preventing the refrigerant leakage, and the good sealing performance can ensure the pressure stability in the refrigerant filling system.

[0052] During the refrigerant filling operation, the refrigerant filling tool can be subjected to external forces such as vibration, pulling, etc., which can cause the connection between the conduit 2 and the elbow to be loose. The pressurization of the fixed ring 43 to the conduit 2 increases the friction between the conduit 2 and the elbow, so that the connection between them is more firm, which can resist the interference of external force and prevent the connection from being loose.

[0053] In addition, it should be emphasized that the refrigerant filling device can also be used for filling the tire repair liquid.

[0054] The operation steps of the embodiment of the present application are as follows:

[0055] Step one: check the tool and equipment

[0056] Carefully check the refrigerant filling tool, including whether the input connector 1, the output connector 4, the conduit 2, the three-way valve 5, the pressure gauge 3 and other components are intact, to ensure that there is no leakage and no damage.

[0057] Check the appearance of the refrigerant storage tank, confirm that there is no deformation and no damage, and check whether the valve on the refrigerant storage tank can be normally opened and closed.

[0058] Check the equipment host, ensure that the access point is clean, free of debris, and in a suitable state for refrigerant filling.

[0059] Step two: connect the equipment

[0060] Confirm that the rotary switch 11 at the input connector 1 is in the closed state, and close the valve on the refrigerant storage tank to prevent refrigerant leakage during the connection process.

[0061] Wipe the outlet of the refrigerant storage tank and the inlet of the input connector 1 with a clean cloth to remove dust, oil stains and other impurities, and ensure that the connection part is clean.

[0062] Align the outlet of the refrigerant storage tank with the inlet of the input connector 1, and slowly insert it to ensure that the connection is tight. If the input connector 1 has a thread 44 design, rotate the refrigerant storage tank according to the direction of the thread 44, so that it is firmly connected with the input connector 1.

[0063] Place the output connector 4 (rotary joint) of the refrigerant filling tool close to the access point of the equipment host, and carefully observe to ensure that the front thread 44 and the protruding block 45 of the rotary joint match the access point of the equipment host.

[0064] Align the front end of the swivel joint with the access point of the equipment host, then slowly rotate the swivel joint in the direction of the threads 44, screwing it into the equipment host. During the screwing process, keep the swivel joint stable to avoid tilting and ensure a tight connection.

[0065] After the screwing is complete, gently shake the refrigerant charging tool to check whether the connection between the swivel joint and the equipment host is firm, ensuring that there is no looseness.

[0066] Step Three: Refrigerant Charging

[0067] Confirm that the connection between the conduit 2, three-way valve 5, pressure gauge 3, and other components is normal, and that the air passage 46 is unobstructed. You can preliminarily determine whether the air passage 46 is connected by observing whether the needle of the pressure gauge 3 has a slight fluctuation (at this time, due to the valve being closed, the fluctuation should be very small).

[0068] Slowly rotate the swivel switch 11 of the input connection head 1 to the open state. At this time, the refrigerant in the refrigerant storage tank will pass through the input connection head 1, conduit 2, three-way valve 5, etc., through the air passage 46 connected by the swivel joint and the equipment host, and enter the equipment host.

[0069] Closely observe the reading of the pressure gauge 3 and observe the pressure change of the refrigerant to ensure that the refrigerant charging pressure is within the required range of the equipment host.

[0070] Pay attention to the operation of the equipment host. If there are abnormalities such as sudden pressure rise or drop, abnormal noise of the equipment, etc., immediately close the swivel switch 11, stop the refrigerant charging, and check the cause.

[0071] According to the refrigerant charging requirements of the equipment host and the reading of the pressure gauge 3, adjust the opening of the swivel switch 11 in a timely manner to control the flow of refrigerant and avoid excessive refrigerant charging. When the required refrigerant charging amount of the equipment host is reached, close the swivel switch 11 in time.

[0072] Step Four: Remove the Tool

[0073] First, close the valve on the refrigerant storage tank, then close the swivel switch 11 of the input connection head 1 to prevent the refrigerant from continuing to leak.

[0074] Carefully unscrew the swivel joint from the equipment host, then detach the refrigerant storage tank from the input connection head 1.

[0075] Wipe the refrigerant charging tool and the equipment host with a clean cloth to remove residual refrigerant and impurities for next use.

[0076] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0077] In the utility model, unless explicitly specified and limited, the first feature is "on" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through an intermediate medium. The meaning of "a plurality of" is at least two, such as two, three, etc., unless explicitly and specifically limited.

[0078] In the utility model, unless explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0079] The above is only for illustrating the embodiments of the utility model, and is not used for limiting the utility model, for ordinary skilled persons in the art, any modification, equivalent replacement, improvement, etc. made without creative labor within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A refrigerant charging device, characterized in that, Includes an input connector for connecting the refrigerant storage tank, an output connector for connecting the main unit of the equipment, a conduit connecting the input connector and the output connector, a three-way valve connected to the conduit, and a pressure gauge connected to the three-way valve; The input connector is equipped with a rotary switch; The output connector is a nested structure of a rotary connector and a fixed connector. The fixed connector is inserted into the inner wall of the conduit. A fixing ring is sleeved on the outer side of the connection section between the conduit and the fixed connector. The other end of the fixed connector is connected to the rotary connector. The front end of the rotary connector is provided with threads and a protrusion that connects to the main unit of the device. The inner sides of the rotary connector and the fixed connector are provided with air passages that extend to both sides of the protrusion and communicate with the outside. The air passages are connected to the conduit.

2. The refrigerant charging device according to claim 1, characterized in that: The catheter is a transparent flexible tube.

3. The refrigerant charging device according to claim 1, characterized in that: The fixed joint is equipped with three integrally formed sealing rings.

4. The refrigerant charging device according to claim 1, characterized in that: The upper end of the input connector is connected to a rotatable elbow, and the other end of the elbow is connected to the inside of the conduit.

5. A refrigerant charging device according to claim 4, characterized in that: A retaining ring is provided on the outer side of the section where the conduit connects to the elbow.

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