WO2024041495A1

WO2024041495A1 - Charging valve capable of actively controlling

Info

Publication number: WO2024041495A1
Application number: PCT/CN2023/114137
Authority: WO
Inventors: 冯光华; 陈狄永; 周峰; 楼峰
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2022-08-26
Filing date: 2023-08-22
Publication date: 2024-02-29
Also published as: CN218761436U

Abstract

A charging valve (200) capable of actively controlling. The charging valve (200) capable of actively controlling comprises a valve body (100), a circulation cavity (110) being provided on the inner side of the valve body (100), wherein one end of the circulation cavity (110) is connected to a pipeline (120), and the other end thereof is connected to a charging portion (130); a valve core (111) is provided in the circulation cavity (110), the valve body (100) is provided with a valve port (121), and the valve core (111) can get away from or abut against the valve port (121) or a sealing member (140) provided on the valve port (121) so as to open or close the circulation cavity (110); before the charging portion (130) is connected to or disconnected from a charging hose (300), the charging portion (130) is not communicated with the pipeline (120); and after the charging portion (130) is connected to the charging hose (300), the charging portion (130) is communicated with the pipeline (120) by means of the circulation cavity (110).

Description

An actively controlled filling valve

Related applications

This application claims priority to the Chinese patent application filed on August 26, 2022, with application number 202222308150.1 and titled "An actively controllable filling valve", the full text of which is hereby incorporated by reference.

Technical field

The present application relates to the technical field of refrigeration control, and specifically relates to an actively controllable filling valve.

Background technique

During the manufacturing or maintenance process of the refrigeration system, the refrigerant needs to be charged into the refrigeration system through the refrigerant charging equipment. The charging valve is installed between the refrigerant charging equipment and the refrigeration system and can connect or disconnect the refrigerant. The refrigerant charging passage between the charging equipment and the refrigeration system; the refrigerant is flammable and explosive, and can form an explosive mixture when mixed with air. There is a danger of combustion and explosion when exposed to heat sources and open flames.

The traditional charging valve includes a valve seat and a charging joint arranged on the valve seat. A valve cavity is formed in the valve seat. The charging joint connects and penetrates the valve cavity, and then connects the refrigerant tank, vacuum pump, pressure gauge, etc. A charging channel is formed to realize the function of charging refrigerant.

When the traditional charging valve is used to charge refrigerant, the charging joint needs to be connected to the charging port through hole. The moment when the charging port through hole is connected, the cone surface of the charging port valve has not yet met, and the charging port valve If the core has been pushed open, it will cause external communication in a short period of time. At this time, because there is pressure in the charging valve, the refrigerant will spray out quickly, and the leakage amount cannot be controlled manually, which may easily cause combustion due to refrigerant leakage. Explosion safety risk.

Contents of the invention

The embodiment of the present application provides an actively controllable filling valve, which includes a valve body. A flow chamber is provided on the inside of the valve body. One end of the flow chamber is connected to a pipeline, and the other end is connected to a filling part; A valve core is provided in the flow chamber, and the valve body is provided with a valve port. The valve core can be away from or abut against the valve port to open and close the flow chamber; when the filling part and the filling part Before the hose is connected or disconnected, the valve core moves in a direction close to the valve port and contacts the valve port or a seal provided on the valve port to disconnect the flow chamber, so The filling part is not connected to the pipeline; when the filling part is connected to the filling hose, the valve core moves in a direction away from the valve port and conducts the flow chamber, and the filling part The injection part communicates with the pipeline through the flow cavity.

In one embodiment, the outer surface of the valve core is provided with external threads, and the inner surface of the valve body forming the flow chamber is provided with internal threads; the valve body and the valve core are threadedly matched, and the valve body is threadedly coupled to the valve core through the rotary valve. core, thereby realizing the valve core moving up and down in the flow chamber.

In one embodiment, at least one layer of sealing structure is provided in the gap between the valve core and the flow chamber. The sealing structure is located on the outer periphery of the valve core. Along the radial direction of the valve core, the sealing structure is The sealing structure is pressed between the inner surface forming the flow channel and the valve core.

In one embodiment, the sealing structure is a sealing ring, and the valve core includes a groove along the radial direction of the valve core. The groove is recessed inward from the outer circumferential surface of the valve core, and the sealing A portion of the ring is located in the groove, and the sealing ring is pressed between the bottom wall of the groove and the inner surface of the valve body forming the flow chamber.

In one embodiment, the number of the sealing structures is two or more, and the sealing structures are arranged at intervals along the axial direction of the valve core.

In one embodiment, the valve core includes a fitting portion, the cross-sectional shape of the fitting portion is triangular or trapezoidal, and the valve core contacts the valve port through the fitting portion.

In one embodiment, when the valve core is in contact with the sealing member, part of the fitting portion passes through the communication hole, and the fitting portion is in contact with the side peripheral wall of the sealing member forming the communication hole.

In one embodiment, the actively controllable filling valve further includes a limiting clamp ring and a clamping groove. The clamping groove is formed by being recessed inward from the inner surface forming the flow cavity along the radial direction of the flow cavity. Part of the limiting collar is located in the groove, along the axial direction of the flow channel, the valve core is located between the limiting collar and the valve port, and the limiting collar The cap is arranged closer to the filling valve than the valve port.

In one embodiment, the valve body is made of stainless steel, an inner hexagonal groove is provided on one side of the valve core, and a cap is provided on one end of the valve body close to the inner hexagonal groove.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the application will become apparent from the description, drawings and claims.

Description of drawings

To better describe and illustrate embodiments and/or examples of those inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the disclosed inventions, the embodiments and/or examples presently described, and the best modes currently understood of these inventions.

Figure 1 is a schematic structural diagram of an actively controllable filling valve in an embodiment of the present application.

Figure 2 is a schematic diagram of an actively controllable filling valve closing a flow chamber in an embodiment of the present application.

Figure 3 is a schematic diagram of an actively controllable filling valve connected to a filling hose in an embodiment of the present application.

Among them, the above-mentioned drawings include the following reference signs:
200. Charging valve; 100. Valve body; 110. Flow chamber; 1101. Card slot; 1102. Internal thread; 111. Valve core;
1111. Groove; 1112. External thread; 112. Internal hexagonal groove; 113. Fitting part; 114. Cap; 115. Limiting collar; 120. Pipe; 121. Valve port; 1211. Accommodating groove; 130. Filling 140. Seal; 1401. Communication hole; 150. Sealing structure; 300. Filling hose.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly located on the other element or intervening elements may also be present. When an element is said to be "located on" another element, it can be directly located on the other element or intervening elements may also be present. When an element is said to be "fixed to" another element, it can be directly attached to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The charging valve is a device used to block or connect the refrigerant valve cavity and passage. In actual use, the charging hose needs to be connected to the charging port. The moment when the charging port through hole is connected, a short time will be caused. The internal and external connections lead to refrigerant leakage in the valve body, which can easily lead to safety risks of combustion and explosion due to refrigerant leakage. At the same time, because the refrigeration equipment is in a positive pressure state, the pressure inside the refrigeration equipment is also different depending on the type of refrigerant inside the pipeline. Especially for some high-pressure refrigeration equipment, the refrigerant pressure in the equipment can reach dozens of atmospheres. When connecting During the process, due to the influence of operating space, operating proficiency and other factors, although the opening time of the common charging valve and the charging hose is very short, the problem of refrigerant leakage will inevitably occur, and then the problem of refrigerant leakage will inevitably occur. This has led to a series of problems, such as frostbite, environmental pollution and other issues. In order to ensure that the charging valve can artificially control the leakage amount and leakage concentration of refrigerant during the process of charging refrigerant, the valve body structure of the charging valve needs to be optimized.

Referring to FIG. 1 , which is a schematic structural diagram of an actively controllable filling valve 200 in an embodiment of the present application.

As shown in Figure 1, the present application provides an actively controllable filling valve 200, which includes: a valve body 100. A flow chamber 110 is provided inside the valve body 100, and one end of the flow chamber 110 is connected to a pipeline 120. , the other end is connected to the charging part 130; The flow chamber 110 is provided with a valve core 111, and the valve body 100 is provided with a valve port 121. As for the valve body 100 alone, the valve port 121 forms a part of the flow chamber 110, and the valve core 111 can stay away from or come into contact with the valve port 121 to open and close the flow chamber 110, so that the pipeline 120 is connected or not connected with the filling part 130; when the filling part 130 is connected to the filling hose 300, The valve core 111 moves in a direction away from the valve port 121 and conducts the flow channel 110 to achieve filling; when the filling part 130 is connected or disconnected from the filling hose 300, The valve core 111 moves in a direction close to the valve port 121 and abuts the valve port 121 to disconnect the flow channel 110 to avoid possible accidents caused when the filling part 130 is connected or disconnected from the filling hose 300 Refrigerant leak.

The present application provides another actively controllable filling valve 200 and a valve body 100. A flow chamber 110 is provided inside the valve body 100. One end of the flow chamber 110 is connected to a pipeline 120 and the other end is connected to a filling valve. Injection part 130; the flow cavity 110 is provided with a valve core 111, the valve body 100 is provided with a valve port 121, the valve port 121 is provided with a seal 140, the valve core 111 can be away from or against all The seal 140 thereby switches on and off the flow channel 110; before the filling part 130 is connected or disconnected from the filling hose 300, the valve core 111 moves in a direction close to the valve port 121 and connects with the filling part 130. The seal 140 contacts and disconnects the flow channel 110, and the filling part 130 is not connected with the pipe 120; when the filling part 130 is connected to the filling hose 300, the valve core 111 moves in a direction away from the valve port 121 and leads to the flow chamber 110 , and the filling part 130 communicates with the pipe 120 through the flow chamber 110 .

In some embodiments of the present application, the valve body 100 is provided with a flow channel 110. When the filling hose 300 of the filling device is connected to the filling part 130 or the filling hose 300 is When the part 130 is disconnected, there is a short-term communication between the filling part 130 and the flow chamber 110. At this time, the valve core 111 in the flow chamber 110 can be set to contact the valve port 121 to block the flow chamber. 110, ensuring that the refrigerant in the flow chamber 110 will not rush out of the charging part 130 due to pressure, thereby causing a large amount of leakage, and can effectively control the leakage amount during the charging connection of the valve body 100 and concentration, reducing safety risks due to refrigerant leakage during charging connections.

Referring to Figures 2 and 3, there is a schematic structural diagram of an actively controllable filling valve 200 closing the flow chamber 110 and connecting the filling hose 300 in an embodiment of the present application.

As shown in Figures 2 and 3, in some embodiments of the present application, a valve core 111 is provided in the flow chamber 110, and an external thread 1112 is provided on the outer surface of the valve core 111. The valve body 100 forms the The inner surface of the flow cavity 110 is provided with internal threads 1102; the valve body 100 and the valve core 111 are threaded, and the valve core 111 is rotated to realize the up and down movement of the valve core 111 in the flow cavity 110. Move; at the same time, the valve core 111 is maintained at the middle position of the flow chamber 110 without the need for auxiliary parts such as positioning rings and retaining rings. On the one hand, since there is no need for auxiliary parts, the impact of the installation of auxiliary parts on the movement and positioning of the valve core 111 is avoided. For example, if the auxiliary parts are missing, not installed in place, or are installed incorrectly, causing the valve core 111 to be affected by the movement inside the valve body. The risk of pressure flying out; on the other hand, compared with the use of auxiliary parts such as retaining rings for positioning in traditional technology, the structural cooperation between the flow chamber 110 and the valve core 111 can be used to achieve the positioning of the valve core 111. The assembly reliability is effectively improved, thereby improving the use safety of the valve core 111.

Further, in some embodiments of the present application, the valve body 100 is made of stainless steel. Compared with the traditional copper valve body structure, the filling valve 200 of the present application can reduce the material cost of the valve body. In addition, , and is also conducive to product miniaturization and reducing the product weight of the filling valve 200.

Further, in some embodiments of the present application, a valve core 111 is provided in the flow chamber 110, and the central axis of the valve core 111 coincides with the central axis of the pipe 120. When the valve core 111 is rotated When rotating in the valve cavity of the flow chamber 110, the valve core 111 can move up and down along the central axis of the pipe 120 under the cooperation of the thread, so as to connect with all the parts of the valve body 100. The valve port 121 abuts or separates to achieve the cutoff or flow of the refrigerant in the flow cavity 110 .

Further, in some embodiments of this application, in actual operation:

S1: Rotate the valve core 111 so that the valve core 111 moves toward the valve port 121 until the valve core 111 resists the valve port 121 to form a seal.

S2: Connect the filling hose 300 of the filling equipment to the filling part 130 until the interfaces at both ends are connected and tightened.

S3: Rotate the valve core 111 upward until the valve core 111 rotates to the side of the flow chamber 110, and a flow channel is formed between the pipe 120 and the filling part 130.

S4: Open the charging device, and the refrigerant in the charging device is output from the charging hose 300 and flows into the pipe 120 along the flow cavity 110 .

S5: After the refrigerant is charged, first rotate the valve core 111 downward until the flow channel of the flow cavity 110 forms an open circuit.

S6: Then disconnect the filling hose 300 and the filling part 130, and the entire filling operation ends.

Furthermore, in some embodiments of the present application, at least one layer of sealing structure 150 is provided in the gap between the valve core 111 and the flow chamber 110 . In order to ensure a good seal between the outer peripheral surface of the valve core 111 and the flow cavity 110, and to avoid the refrigerant flowing through the assembly gap between the outer peripheral surface of the valve core 111 and the flow cavity 110 when the charging valve 200 is operating normally. Leakage, at least one layer of sealing structure 150 is provided in the gap between the valve core 111 and the flow chamber 110. The sealing structure 150 is located on the outer periphery of the valve core 111. When there are two or more sealing structures 150, The sealing structures 150 can be arranged at intervals along the axial direction of the valve core 111; specifically, in this embodiment, the sealing structures 150 can be sealing rings, and the valve core 111 is provided with a groove 1111 for accommodating the sealing ring. The groove 1111 The number of sealing rings is equal to the number of sealing rings. Along the radial direction of the valve core 111, the groove 1111 is recessed inward from the outer circumference of the valve core 111. Part of the sealing ring is located in the groove 1111, and the sealing ring is pressed against the bottom of the groove 1111. Between the wall and the inner surface forming the flow chamber 110, the sealing ring is in a sealing and compressed state. Of course, as other embodiments, the valve core 111 may not include the groove 1111 , that is, the sealing ring is directly pressed between the inner surface forming the flow channel 110 and the outer peripheral surface of the valve core 111 .

Furthermore, in some embodiments of the present application, in order to consider the sealing effect of contacting the valve port 121 in practical applications, the valve core 111 includes a fitting part 113, and the cross-sectional shape of the fitting part 113 is triangular or triangular. The trapezoid shape, on the one hand, improves the structural strength of the fitting portion 113, and on the other hand, the triangular or trapezoidal sides can better form line or surface contact with the outer surface of the valve port 121, thereby improving the hard sealing effect.

Further, in one embodiment of the present application, the filling valve 200 further includes a seal 140. The seal 140 is provided at the valve port 121. Specifically, along the radial direction of the flow chamber 110, the valve port 121 is recessed inward. A receiving groove 1211 is formed, and at least part of the seal 140 is located in the receiving groove 1211. The seal 140 has a communication hole 1401 that can communicate with the flow chamber 110. The valve core 111 can stay away from or abut against the seal 140, thereby opening and closing the flow chamber. Channel 110; when the valve core 111 is in contact with the seal 140, part of the fitting portion 113 passes through the communication hole 1401, and the fitting portion 113 is in contact with the side peripheral wall of the communication hole 1401 of the seal 140. It can be understood that the seal 140 is provided to form a soft seal between the valve core 111 and the valve port 121 to improve the sealing effect.

Further, in some embodiments of the present application, an inner hexagonal groove 112 is provided on one side of the valve core 111. During actual use, a hexagonal wrench is used to operate the valve core 111. Specifically, the valve core 111 is moved up and down by rotation. , adjust the flow channel 110 to be disconnected; at the same time, in order to consider the overall compactness of the filling valve 200, the inner hexagonal groove 112 can be countersunk during use, that is, the entire inner hexagonal groove 112 is sunk into the inside of the valve member, and can be maintained The surface of the valve core 111 is smooth; on the other hand, the internal hexagonal groove 112 can withstand a greater load, because there are six stress-bearing surfaces of the internal hexagonal groove 112, compared with the one-shaped groove structure and the ten-shaped groove structure with only two surfaces. The Z-shaped groove structure is more reliable.

Furthermore, in some embodiments of the present application, one end of the valve body 100 is provided with a cap 114. Since one end of the valve core 111 is provided with the structure of the internal hexagonal groove 112, there may be problems in daily use. Sand, dust, etc. enter the groove and affect the operability of the filling valve 200, so the cap 114 is provided on the hexagonal groove 112; on the other hand, the cap 114 can seal one end of the valve body 100 Play a sealing role.

Further, in some embodiments of the present application, a limiting clamp ring 115 is provided in the flow channel 110. The limiting clamp ring 115 is used to limit the position of the valve core 111. The valve body 100 includes a clamping groove. 1101, the clamping groove 1101 extends along the radial direction of the flow cavity 110, and the clamping slot 1101 is formed inwardly from the inner surface forming the flow cavity 110, and the part of the limiting collar 115 is located in the clamping slot 1101; along the flow cavity 110 in the axial direction, the valve core 111 is located between the limit collar 115 and the valve port 121, and the limit collar 115 is set closer to the cap 114 than the valve port 121. When the valve core 111 is far away from the valve port 121, the valve core 111 can In contact with the limiting collar 115 , the stroke of the valve core 111 can be limited by the limiting collar 115 .

In actual application, the actively controllable filling valve 200 provided by this application has a simple structure and high reliability. It can open and close the filling valve 200 conveniently without being affected by the operating space and operating proficiency. The impact can avoid frostbite caused by refrigerant leakage during the connection and disassembly process.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, the above-described embodiments are not described. All possible combinations of each technical feature in are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

An actively controllable filling valve, characterized in that it includes: a valve body, a flow cavity is provided inside the valve body, one end of the flow cavity is connected to a pipeline, and the other end is connected to a filling part;

A valve core is provided in the flow chamber, and the valve body is provided with a valve port. The valve core can be away from or abut against the valve port to open and close the flow chamber;

When the filling part is connected to or disconnected from the filling hose, the valve core moves in a direction close to the valve port and contacts the valve port or a seal provided on the valve port, The flow chamber is disconnected, and the filling part is not connected to the pipeline; when the filling part is connected to the filling hose, the valve core moves in a direction away from the valve port and conducts The flow chamber, the filling part communicates with the pipeline through the flow chamber.
The actively controllable filling valve according to claim 1, wherein the outer surface of the valve core is provided with external threads, and the inner surface of the valve body forming the flow chamber is provided with internal threads; It cooperates with the thread of the valve core and rotates the valve core to realize the up and down movement of the valve core in the flow cavity.
The actively controllable filling valve according to claim 1, wherein at least one layer of sealing structure is provided in the gap between the valve core and the flow chamber, and the sealing structure is located on the outer periphery of the valve core, Along the radial direction of the valve core, the sealing structure is pressed between the inner surface forming the flow chamber and the valve core.
The actively controllable filling valve according to claim 3, wherein the sealing structure is a sealing ring, the valve core includes a groove, and the groove extends from the valve core along the radial direction of the valve core. The outer circumferential surface of the core is recessed inward, part of the sealing ring is located in the groove, and the sealing ring is pressed between the bottom wall of the groove and the inner surface of the valve body forming the flow chamber. between.
The actively controllable filling valve according to claim 3, wherein the number of the sealing structures is two or more, and the sealing structures are arranged at intervals along the axial direction of the valve core.
The actively controllable filling valve according to claim 1, wherein the valve core includes a fitting portion, the cross-sectional shape of the fitting portion is a triangle or a trapezoid, and the valve core is connected to the valve through the fitting portion. Oral contact.
The actively controllable filling valve according to claim 1, wherein when the valve core abuts against the seal, part of the fitting portion passes through the communication hole formed on the valve body, and the fitting portion is connected to the sealing member. The sealing member is in contact with the side peripheral wall of the communication hole.
The actively controllable filling valve according to claim 1, wherein the actively controllable filling valve further includes a limiting clamp ring and a clamping groove, and the clamping groove self-forms along the radial direction of the flow chamber. The inner surface of the flow chamber is recessed inward, and part of the limiting collar is located in the groove. Along the axial direction of the flow chamber, the valve core is located between the limiting collar and the valve. between the ports, and the limiting collar is arranged closer to the cap of the filling valve than the valve port.
The actively controllable filling valve according to claim 1, wherein the valve body is made of stainless steel, an inner hexagonal groove is provided on one side of the valve core, and the valve body is close to one end of the inner hexagonal groove. Set with cap.