Multi-channel switching mechanism for refrigerant filling valve group

Abstract

The utility model discloses a kind of multi-channel switching mechanism for refrigerant filling valve group, including ball valve, ball valve one end is connected with the installation of coil pipe, pipeline switching mechanism is rotatably installed in coil pipe, another end of coil pipe is connected with the installation of three groups of branch pipe, ball valve is connected with pipeline switching mechanism, and pipeline switching mechanism can be communicated with each group of branch pipe by rotating respectively. The utility model passes through pipeline switching mechanism, and its selective communication of multiple branch pipes is realized by rotating, functional switching is realized, and the stability of coil pipe and entire pipeline system is guaranteed by the double regulation of length and angle of two support structures, the cooperation of three, which meets the channel switching demand of multiple processes, high-precision in refrigerant filling, and also improves the reliability of equipment under complex working conditions through the optimization of mechanical structure.

Description

Technical Field

[0001] This utility model relates to the field of channel switching technology, specifically a multi-channel switching mechanism for refrigerant filling valve assembly. Background Technology

[0002] Precise refrigerant filling is a core element in ensuring product performance and operational safety. The efficient execution of this process relies on the coordinated operation of various valves and drive systems. Among these, the multi-channel switching mechanism, acting as a refrigerant filling valve assembly, directly determines filling efficiency, accuracy, and safety by flexibly switching between functions such as vacuuming, filling, and recovery.

[0003] Patent CN222699994U discloses a sterile filling valve assembly, including a filling valve assembly body and a dispensing nozzle column at its lower end; a connecting telescopic inner sleeve is provided on the inner side of the connecting telescopic outer sleeve, and a medical alcohol swab is provided inside the connecting telescopic outer sleeve; a compression connection reset spring is provided on the upper side of the connecting telescopic inner sleeve, and a compression limiting connection block is provided on the upper side of the compression connection reset spring; the connecting telescopic inner sleeve is originally located at the contact position between the air outlet of the inner tube and the air outlet of the outer tube; the medical alcohol swab can cause gas to be emitted from the inner side of the connecting telescopic inner sleeve and the outer side of the dispensing nozzle column; when the connecting telescopic inner sleeve is compressed, the air outlet of the inner tube and the air outlet of the outer tube are misaligned, and the alcohol gas cannot be discharged. Through the improvement of this utility model, the outer side of the dispensing nozzle column can be sterilized with alcohol gas when the filling valve assembly is not in use, thereby effectively improving the safety and practicality of the filling valve assembly.

[0004] However, the aforementioned aseptic filling valve assembly is limited to the coordination of single sterilization and basic filling actions, and cannot cope with complex working conditions involving multi-channel switching and multi-process coordination. Expanding its functions requires significant structural modifications, resulting in poor adaptability. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-channel switching mechanism for refrigerant filling valve groups, so as to solve the technical problem that the existing valve groups have a single function, cannot cope with the complex working conditions of multi-channel switching and multi-process coordination, and have weak adaptability.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-channel switching mechanism for a refrigerant filling valve assembly includes a ball valve, one end of which is connected to a coil, and a pipeline switching mechanism is rotatably installed inside the coil. The other end of the coil is connected to three sets of branch pipes. The ball valve is connected to the pipeline switching mechanism, and the pipeline switching mechanism can be connected to each set of branch pipes by rotation.

[0008] As a preferred embodiment of this utility model, the ball valve can be individually connected to each group of branch pipes by rotating the pipeline switching mechanism.

[0009] As a preferred embodiment of this utility model, a tube is rotatably mounted on the lower surface of the coil via a universal ball joint, a threaded rod is installed on the inner thread of the tube, and a mounting seat is rotatably mounted on the outer end of the lower surface of the threaded rod via a universal ball joint.

[0010] As a further embodiment of this invention, the threaded rod can be extended in length by being screwed out from the internal thread of the tube and supported by the mounting base.

[0011] As a preferred embodiment of this utility model, the pipeline switching mechanism includes a stepper motor, the output shaft of which rotates through the coil and is fixedly connected to the switching plate. The switching plate is rotatably installed inside the coil, and the two ends of the outer surface of the switching plate are respectively connected to the discharge port and the inlet port, the diameter of the inlet port being larger than the diameter of the discharge port.

[0012] As a further embodiment of this utility model, the feed inlet is connected to the ball valve, while the discharge outlet can be connected to each group of branch pipes individually by rotation, and the feed inlet will always be connected to the ball valve during this process.

[0013] As a further embodiment of this utility model, a sealing ring is fixedly installed on the protruding surface of the feed inlet groove.

[0014] Compared with the prior art, the advantages of the multi-channel switching mechanism for refrigerant filling valve assembly of this utility model are as follows:

[0015] 1. Achieve precise, automated switching across multiple channels to meet diverse needs: The rotating design of the pipeline switching mechanism (core of which is a combination of a switching plate and a stepper motor) precisely controls the sequential sealing and connection of the discharge port with the three branch pipes, corresponding to different functions such as vacuuming, coarse filling, fine filling, or recycling. The stepper motor precisely adjusts the rotation angle of the switching plate via pulse signals, ensuring complete alignment between the discharge port and the target branch pipe inlet, achieving a "single-channel independent connection" switching effect. This allows for automated multi-process conversion without manual intervention, significantly improving the flexibility and adaptability of the filling process.

[0016] 2. Ensure the continuity and stability of refrigerant delivery: During the switching process, the inlet of the pipeline switching mechanism is always sealed and connected to the outlet of the ball valve through the sealing ring, and the ball valve is always in the open state. This ensures that the refrigerant is delivered from the main pipeline to the switching mechanism without interruption, avoids flow fluctuations or sudden changes in system pressure caused by the switching operation, ensures the continuity of filling, recycling and other processes, and improves the accuracy of refrigerant treatment.

[0017] 3. Enhanced sealing performance to eliminate leakage risks: The feed inlet of the switching plate and the ball valve outlet are tightly connected by a protruding sealing ring, and the connection between the discharge outlet and the branch pipe inlet is also sealed. This double-sealing design effectively prevents refrigerant leakage, ensuring production safety and avoiding material waste. Simultaneously, the stability of the sealing structure ensures that the system maintains good tightness under pressure changes, meeting the high-pressure requirements of refrigerant filling.

[0018] 4. Improved Flow Efficiency and Filling Results: The inlet diameter of the refrigerant converter is larger than the outlet diameter, causing pressure buildup in the refrigerant upon entry. This increases the flow velocity at the outlet, accelerating the processing speed of coarse and fine filling, and improving overall filling efficiency. Furthermore, stable flow velocity and pressure help ensure accurate filling volume, reducing metering errors caused by unstable flow rates.

[0019] 5. Flexible support structure ensures system stability: The support structure, consisting of a pipe, threaded rod, and mounting base, allows for flexible adjustment of its overall length by rotating the threaded rod, adapting to different installation environments and coil load-bearing requirements. Simultaneously, the universal ball joint design between the pipe and coil, and between the threaded rod and mounting base, automatically adapts to slight tilting of the coil due to pressure or installation errors, ensuring the mounting base remains tightly fitted to the support surface. This prevents deformation and sealing failure caused by uneven stress, thus guaranteeing the structural stability and service life of the entire piping system.

[0020] 6. Single-motor control optimizes system performance and reduces costs: The pipeline switching mechanism uses a single set of stepper motors to independently control the rotation of the switching plate. Compared with multi-motor control, this reduces the possibility of action delay or conflict, and improves the continuity and timeliness of switching actions. At the same time, it reduces the number of motors and supporting control components, lowers manufacturing costs, and eliminates the need to deal with multi-motor matching issues, simplifying the later maintenance process and improving the economy and ease of use of the equipment.

[0021] In summary, through the coordinated operation of its various components, this mechanism not only meets the requirements for multi-process, high-precision channel switching in refrigerant filling, but also improves the reliability, efficiency, and economy of the equipment under complex working conditions through optimizations in sealing, support, and control. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of an embodiment of the present utility model;

[0024] Figure 2 This is a side view of the structure of an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the pipeline switching mechanism in an embodiment of the present invention.

[0026] Reference numerals: 1. Ball valve; 101. Coil; 102. Branch pipe; 103. Pipe tube; 104. Threaded rod; 105. Mounting base; 2. Pipe switching mechanism; 201. Stepper motor; 202. Switching plate; 203. Inlet; 204. Outlet; 205. Sealing ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0030] See Figure 1-2 As shown in the figure, an embodiment of this utility model discloses a multi-channel switching mechanism for a refrigerant filling valve assembly, including a ball valve 1. One end of the ball valve 1 is connected to a coil 101, and a pipeline switching mechanism 2 is rotatably installed inside the coil 101. The other end of the coil 101 is connected to three sets of branch pipes 102. The ball valve 1 is connected to the pipeline switching mechanism 2, and the pipeline switching mechanism 2 can be rotated to connect to each set of branch pipes 102 individually. The ball valve 1 is individually connected to each set of branch pipes 102 through the rotation of the pipeline switching mechanism 2.

[0031] A tube sleeve 103 is rotatably mounted on the lower surface of the coil 101 via a ball joint. A threaded rod 104 is threaded onto the inner thread of the tube sleeve 103. A mounting base 105 is rotatably mounted on the outer end of the lower surface of the threaded rod 104 via a ball joint. The threaded rod 104 extends its overall length by being screwed out from the inner thread of the tube sleeve 103 and supports the coil 101 via the mounting base 105.

[0032] like Figure 3 As shown, the pipeline switching mechanism 2 includes a stepper motor 201. The output shaft of the stepper motor 201 rotates through the coil 101 and is fixedly connected to the switching plate 202. The switching plate 202 is rotatably installed inside the coil 101. The two ends of the outer surface of the switching plate 202 are respectively connected to the discharge port 204 and the inlet port 203. The diameter of the inlet port 203 is larger than the diameter of the discharge port 204.

[0033] The feed inlet 203 is connected to the ball valve 1, while the discharge outlet 204 can be connected to each branch pipe 102 individually by rotation, and the feed inlet 203 will always be connected to the ball valve 1 during this process.

[0034] Initially, ball valve 1 is open, and its internal channel is connected to coil 101. The pipeline switching mechanism 2 inside coil 101, as the core switching component, maintains a sealed connection between its inlet 203 and the outlet of ball valve 1, ensuring stable refrigerant entry into the pipeline switching mechanism 2. At this time, the outlet 204 of the pipeline switching mechanism 2 is not connected to any of the branch pipes 102, and the multiple branch pipes 102 are in a state of pending connection. When switching to a specific branch pipe 102 is required, the pipeline switching mechanism 2 is activated, causing its outlet 204 to gradually rotate until it aligns with the inlet of the target branch pipe 102, until a complete seal is achieved. During this process, the feed of the pipeline switching mechanism 2... Port 203 remains connected to ball valve 1 to ensure continuous refrigerant delivery. Simultaneously, the rotation of the pipeline switching mechanism 2 only establishes a connection between the current target branch pipe 102 and ball valve 1, while the other branch pipes 102 remain closed. This achieves the effect of "ball valve 1 being individually connected to a single branch pipe 102 via the pipeline switching mechanism 2." By controlling the rotation angle of the pipeline switching mechanism 2, it can sequentially connect to three branch pipes 102, corresponding to different functions such as vacuuming, coarse filling, fine filling, or recovery. For example, when outlet 204 connects to the first branch pipe 102, the refrigerant enters the coarse filling system through this pipe; when rotating to the second branch pipe 102, the process switches to fine filling. When connecting to the third group of branch pipes 102, the recycling function is activated, thereby realizing automated switching of multiple channels. Simultaneously, the stable installation of the coil 101 is ensured by a support structure composed of the tube 103, threaded rod 104, and mounting base 105. Depending on the space height of the installation environment or the load-bearing requirements of the coil 101, rotating the threaded rod 104 outwards along the internal thread of the tube 103 extends the overall support length; conversely, rotating it inwards shortens the length, achieving flexible adaptation of the support height. Furthermore, since the tube 103 and coil 101, and the threaded rod 104 and mounting base 105 are all connected by universal joints, when the coil 101 tilts slightly due to pipeline pressure or installation errors... The support structure can automatically adjust its angle through the rotation of the universal ball, ensuring that the mounting base 105 is always in close contact with the support surface, such as the equipment frame, thus preventing pipe deformation or sealing failure of the coil 101 due to uneven stress. Overall, the ball valve 1, as the main control valve, controls the total flow of refrigerant into the system. The pipe switching mechanism 2 achieves selective connection of multiple component pipes 102 through rotation, completing the function switching. The support structure, through dual adjustment of length and angle, ensures the stability of the coil 101 and the entire pipe system. The three work together to meet the multi-process, high-precision channel switching requirements in refrigerant filling, and the optimization of the mechanical structure improves the reliability of the equipment under complex working conditions.

[0035] A sealing ring 205 is fixedly installed on the protruding surface of the groove of the feed inlet 203.

[0036] Through the design of the stepper motor 201, the switching plate 202, the inlet 203, the outlet 204, and the sealing ring 205, the inlet 203 of the switching plate 202 and the outlet end of the ball valve 1 are kept tightly sealed and connected by the protruding sealing ring 205, ensuring that the refrigerant will not leak and can stably enter the interior of the switching plate 202. At this time, the outlet 204 of the switching plate 202 is not connected to any of the group branch pipes 102, and the group branch pipes 102 are in a state of waiting to be connected.

[0037] When it is necessary to switch to a certain branch pipe 102, the output shaft of the stepper motor 201 can be started to drive the fixedly connected switching plate 202 to rotate inside the coil 101. As the switching plate 202 rotates, its outlet 204 gradually aligns with the inlet of the target branch pipe 102 until it is completely sealed. Since the diameter of the inlet 203 is larger than the diameter of the outlet 204, the refrigerant will form a certain pressure accumulation after entering the switching plate 202, which helps to increase the flow rate when discharged from the outlet 204 and ensure filling efficiency.

[0038] During this process, the inlet 203 remains tightly connected to the ball valve 1 via the sealing ring 205, ensuring the continuity of refrigerant delivery and preventing leakage. Simultaneously, the rotation of the switching plate 202 only connects the current target branch pipe 102 to the outlet 204, while the other branch pipes 102 remain closed, achieving the effect of "ball valve 1 being individually connected to a single branch pipe 102 via the pipe switching mechanism 2." Furthermore, by controlling the pulse signal of the stepper motor 201 to adjust the rotation angle of the switching plate 202, the outlet 204 can be precisely controlled to sequentially connect to the three branch pipes 104. The 02 docking points correspond to different functions such as vacuuming, coarse filling, fine filling, or recycling. During this process, the control switch panel 202 is individually controlled by a set of stepper motors 201 to allow it to connect to the three sets of branch pipes 102. This ensures the continuity and timeliness of the operation, avoids the delay or conflict that occurs when multiple motors are controlled separately, and improves the efficiency of multi-process switching. In addition, it helps to reduce costs and maintenance difficulty. Single motor control reduces the number of motors and supporting control components, reduces manufacturing costs, eliminates the need to deal with the matching problem between multiple motors, and simplifies the maintenance process.

[0039] Initially, ball valve 1 is open, and its internal passage is connected to coil 101. In the pipeline switching mechanism 2 inside coil 101, the inlet 203 of the switching plate 202 and the outlet end of ball valve 1 are tightly sealed and connected by a protruding sealing ring 205, ensuring that the refrigerant will not leak and can stably enter the switching plate 202. At this time, the outlet 204 of the switching plate 202 is not connected to any of the branch pipes 102, and the multiple branch pipes 102 are in a state of waiting to be connected. When it is necessary to switch to a certain branch pipe 102, the output shaft of the stepper motor 201 can be started to drive the fixedly connected switching plate. The refrigerant 202 rotates within the coil 101, and as the refrigerant 202 rotates, its outlet 204 gradually aligns with the inlet of the target branch pipe 102 until a complete seal is achieved. Because the diameter of the inlet 203 is larger than the diameter of the outlet 204, the refrigerant accumulates pressure after entering the refrigerant 202, which helps increase the flow rate when discharged from the outlet 204, ensuring filling efficiency. During this process, the inlet 203 maintains a tight connection with the ball valve 1 through the sealing ring 205, ensuring the continuity of refrigerant delivery and preventing leakage. Simultaneously, due to the rotation of the refrigerant 202... Only the current target branch pipe 102 is connected to the discharge port 204, while the other branch pipes 102 remain closed. This achieves the effect of "ball valve 1 being connected to a single branch pipe 102 individually via the pipe switching mechanism 2." By controlling the pulse signal of the stepper motor 201 to adjust the rotation angle of the switching disc 202, the discharge port 204 can be precisely controlled to connect sequentially to the three branch pipes 102, corresponding to different functions such as vacuuming, coarse filling, fine filling, or recycling. Simultaneously, the stable installation of the coil 101 is ensured by a support structure composed of the tube 103, threaded rod 104, and mounting base 105, depending on the installation environment. To meet the space height or load-bearing requirements of the coil 101, the overall support length can be extended by rotating the threaded rod 104 outward along the internal thread of the tube 103, and conversely, by screwing it inward, the length can be shortened, thus achieving flexible adaptation of the support height. Since the tube 103 and the coil 101, as well as the threaded rod 104 and the mounting base 105, are all connected by a universal ball, when the coil 101 tilts slightly due to pipeline pressure or installation errors, the support structure can automatically adjust the angle by rotating the universal ball, ensuring that the mounting base 105 is always in close contact with the support surface, and avoiding pipeline deformation or sealing failure caused by uneven stress on the coil 101.

[0040] In summary, this mechanism achieves selective connection of multiple group branch pipes 102 through rotation, completing functional switching. The two support structures ensure the stability of coil 101 and the entire pipeline system through dual adjustment of length and angle. The three work together to meet the requirements of multi-process and high-precision channel switching in refrigerant filling, and improve the reliability of the equipment under complex working conditions through the optimization of mechanical structure.

[0041] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-channel switching mechanism for a refrigerant filling valve assembly, characterized in that: Includes a ball valve (1), one end of which is connected to a coil (101), a pipeline switching mechanism (2) is rotatably installed inside the coil (101), and the other end of the coil (101) is connected to three groups of branch pipes (102). The ball valve (1) is connected to the pipeline switching mechanism (2), and the pipeline switching mechanism (2) can be connected to each group of branch pipes (102) by rotation.

2. The multi-channel switching mechanism for a refrigerant filling valve assembly according to claim 1, characterized in that: The ball valve (1) can be individually connected to each group of branch pipes (102) by rotating the pipeline switching mechanism (2).

3. The multi-channel switching mechanism for a refrigerant filling valve assembly according to claim 1, characterized in that: The lower surface of the coil (101) is rotatably mounted with a tube (103) via a universal ball joint. A threaded rod (104) is threaded inside the tube (103). A mounting base (105) is rotatably mounted on the outer end of the lower surface of the threaded rod (104) via a universal ball joint.

4. The multi-channel switching mechanism for a refrigerant filling valve assembly according to claim 3, characterized in that: The threaded rod (104) can extend its overall length by being screwed out from the internal thread of the tube (103) and support the coil (101) through the mounting base (105).

5. The multi-channel switching mechanism for a refrigerant filling valve assembly according to claim 1, characterized in that: The pipeline switching mechanism (2) includes a stepper motor (201). The output shaft of the stepper motor (201) is rotated through the coil (101) and fixedly connected to the switching plate (202). The switching plate (202) is rotatably installed inside the coil (101). The two ends of the outer surface of the switching plate (202) are respectively connected to the discharge port (204) and the inlet port (203). The diameter of the inlet port (203) is larger than the diameter of the discharge port (204).

6. The multi-channel switching mechanism for a refrigerant filling valve assembly according to claim 5, characterized in that: The feed inlet (203) is connected to the ball valve (1), and the discharge port (204) can be connected to each group of branch pipes (102) individually by rotation. During this process, the feed inlet (203) will always be connected to the ball valve (1).

7. A multi-channel switching mechanism for a refrigerant filling valve assembly according to claim 6, characterized in that: A sealing ring (205) is fixedly installed on the protruding surface of the groove of the feed inlet (203).

Images