A mixed refrigerant filling regulating control device

Abstract

This utility model discloses a mixed refrigerant charging and control device, including a U-shaped frame. Several sets of storage tanks for storing different refrigerants are connected to the top of the U-shaped frame via fixing components. Piston cylinders are fixedly inserted into the back of the U-shaped frame at corresponding positions of each storage tank. A piston disc is slidably connected inside each piston cylinder. Pushing components for pushing the corresponding piston discs are provided on the back of the U-shaped frame. A suction pipe is connected above the end of each piston cylinder. The input end of each suction pipe is connected to the output end of the corresponding storage tank via a detachable connector. This utility model utilizes the reciprocating motion of the piston cylinders to achieve quantitative extraction and delivery of refrigerant without interrupting the process for weighing, significantly improving the efficiency of multiple or large-scale charging. Simultaneously, the fully enclosed suction and delivery pipe design reduces the impact of the external environment on the refrigerant.

Description

Technical Field

[0001] This utility model belongs to the field of refrigerant production technology, specifically relating to a mixed working fluid refrigerant charging and regulating control device. Background Technology

[0002] Mixed refrigerants are typically composed of two or more refrigerants with different saturation pressures. They are also known as non-azeotropic mixed refrigerants. Compared with single refrigerants, mixed refrigerants have many advantages. The performance of the refrigeration system can be optimized by adjusting the proportion of different components, making it more suitable for specific refrigeration needs and operating conditions.

[0003] Most existing refrigerant mixtures are charged using the weighing method. However, for systems that require multiple or large-scale charging, the weighing method requires repeated interruptions of the charging process for weighing, resulting in low efficiency. Furthermore, it is susceptible to interference from factors such as ambient temperature and humidity, and airflow disturbances, which can affect the measurement results of the weighing equipment and lead to errors in the charging amount. Utility Model Content

[0004] The purpose of this invention is to provide a mixed refrigerant charging and control device to solve the technical defects of existing refrigerant charging methods, which involve multiple charging cycles or large-scale repeated interruptions of the charging process for weighing, resulting in low efficiency and susceptibility to charging errors due to environmental influences.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A mixed refrigerant charging and regulating control device includes a U-shaped frame. Several sets of storage tanks for storing different refrigerants are fixedly connected to the top of the U-shaped frame via fasteners. A piston cylinder is fixedly inserted into the back of the U-shaped frame at a position corresponding to each set of storage tanks. A piston disc is slidably connected inside each piston cylinder. Pushing components for pushing the corresponding piston discs are provided on the back of the U-shaped frame. A suction pipe is connected above the end of each set of piston cylinders. The input end of each suction pipe is connected to the corresponding side via a detachable connecting component. The output ends of the storage tanks are connected together. An L-shaped plate is fixedly connected to the upper inner wall of the U-shaped frame. A filling head for refrigerant dispensing is fixedly installed at the bottom of the L-shaped plate. Each set of piston cylinders has an output hole below its end. Each set of output holes is connected to a conveying pipe. The output ends of each set of conveying pipes are connected together and simultaneously connected to the input end of the filling head, so that different refrigerants can be injected into the dispensing tanks. The U-shaped frame is equipped with an upward moving part that pushes the dispensing tanks upward so that their input ends are connected to the output ends of the filling head.

[0006] As a further embodiment of this utility model, the pushing component includes U-shaped frames respectively installed on the back of the U-shaped frame and located at the corresponding positions of each set of piston cylinders. A second electric push rod is fixedly installed on the surface of each set of U-shaped frames. The telescopic end of each set of second electric push rods passes through the corresponding side U-shaped frame and is fixedly connected to the end of the corresponding side piston cylinder.

[0007] As a further embodiment of this utility model, the detachable connecting member includes a first check valve that is threadedly connected to each group of suction pipes. The output end of each group of first check valves is connected to a suction pipe. The other end of each group of suction pipes is rotatably fitted with a cap. The other end of each group of suction pipes is threadedly connected to the output end of the corresponding side storage tank through the cap.

[0008] As a further embodiment of this utility model, the conveying pipe includes conveying pipes that are connected to each set of output holes, the output end of each set of conveying pipes is connected to a second check valve, the output end of each set of second check valves is connected to a collecting pipe, and the output ends of each set of collecting pipes are connected together and connected to the input end of the filling head.

[0009] As a further preferred embodiment of this utility model, the upper moving member includes a placement plate disposed below the filling head. The top of the placement plate has a placement groove for placing the dispensing can. Connecting rods are fixedly connected to the top of both sides of the placement plate. Connecting plates are fixedly connected to the top of the two sets of connecting rods. A first electric push rod is fixedly connected to the inner wall of the top of the U-shaped frame. The telescopic end of the first electric push rod extends downward and is fixedly connected to the top of the connecting plate.

[0010] As a further preferred embodiment of this utility model, a controller is fixedly installed on the back of the U-shaped frame. Both the first electric push rod and the second electric push rod are controlled by the controller. The controller controls the stroke of each second electric push rod according to the preset mixing ratio to achieve precise mixing and charging of different refrigerants.

[0011] As a preferred embodiment of this utility model, the fastener includes a mounting cylinder that is fixedly inserted into the top of the U-shaped frame and located at the corresponding position of each group of storage tanks. The bottom of the mounting cylinder is provided with a through hole, the output end of the storage tank is set downward and passes through the through hole, and a hand-tightening bolt is threadedly connected to one side of each group of mounting cylinders. The end of each group of hand-tightening bolts is threaded through the corresponding side mounting cylinder and abuts against the surface of the corresponding side storage tank.

[0012] Compared with existing technologies, the mixed refrigerant charging and regulating control device of this utility model has the following advantages: 1. This device utilizes the reciprocating motion of the piston cylinder to achieve quantitative extraction and delivery of refrigerant without interrupting the process for weighing, significantly improving the efficiency of multiple or large-scale charging. At the same time, the fully enclosed suction pipe and delivery pipe design reduces the influence of the external environment on the refrigerant and avoids measurement errors caused by environmental disturbances in traditional weighing methods.

[0013] 2. By setting up the pushing component, the linear displacement of the second electric push rod is directly converted into the stroke of the piston disc, realizing precise control of the refrigerant extraction amount. This avoids the errors caused by repeated calibration and manual operation in the traditional weighing method. At the same time, it controls the movement of different second electric push rods to realize the alternating or synchronous charging of different refrigerants. Therefore, it can adapt to complex mixing requirements and avoids the need to wait for the weighing equipment to stabilize before continuing operation in the traditional weighing method.

[0014] 3. The integrated controller in this device enables automated control of the equipment. By pre-setting the mixing ratio, the stroke of each second electric push rod is precisely controlled to achieve accurate mixing and charging of different refrigerants. The controller also has a touch screen interface to provide a user-friendly human-machine interaction, making it easy for operators to set parameters and monitor the charging process, thus reducing the difficulty of operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ; Figure 3 This is a cross-sectional view of the piston cylinder in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the mounting cylinder in an embodiment of this utility model.

[0017] Figure label: 100. U-shaped frame; 101. Storage tank; 102. Dispensing tank; 200. Placement plate; 201. Connecting rod; 202. Placement slot; 203. Connecting plate; 204. L-shaped plate; 205. First electric push rod; 206. Filling head; 300. Mounting sleeve; 301. Hand-tightening bolt; 302. Through hole; 400. Suction pipe; 401. First check valve; 402. Cap; 500, Piston cylinder; 501, Delivery pipe; 502, Piston disc; 503, Output port; 504, Suction pipe; 505, Second check valve; 506, Manifold; 507, Second electric push rod; 508, U-shaped frame; 509, Controller. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model 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 used to explain this utility model and are not intended to limit this utility model.

[0019] In the description of the embodiments of this utility model, 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 this utility model 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 this utility model.

[0020] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" 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 this utility model can be understood according to the specific circumstances.

[0021] See appendix Figure 1-4As shown in the figure, an embodiment of the present invention discloses a mixed refrigerant charging and regulating control device, including a U-shaped frame 100. Several sets of storage tanks 101 for storing different refrigerants are connected to the top of the U-shaped frame 100 via fixing members. Piston cylinders 500 are fixedly inserted into the back of the U-shaped frame 100 at corresponding positions to each set of storage tanks 101. A piston disc 502 is slidably connected inside each set of piston cylinders 500. Pushing members for pushing the corresponding side piston discs 502 are respectively provided on the back of the U-shaped frame 100. A suction pipe 504 is connected above the end of each set of piston cylinders 500. The input end of each set of suction pipes 504 is connected to the output end of the corresponding side storage tank 101 via a detachable connecting member. An L-shaped plate 204 is fixedly connected to the upper inner wall of the U-shaped frame 100. A device for controlling the charging of different refrigerants is fixedly installed at the bottom of the L-shaped plate 204. The filling head 206 for refrigerant dispensing has an output hole 503 at the lower end of each set of piston cylinders 500. Each set of output holes 503 is connected to a delivery pipe 501. The output ends of each set of delivery pipes 501 are connected together and simultaneously connected to the input end of the filling head 206, thereby injecting different refrigerants into the dispensing tank 102. The U-shaped frame 100 is provided with an upward moving part that pushes the dispensing tank 102 upward so that its input end is connected to the output end of the filling head 206. The above scheme uses the reciprocating motion of the piston cylinder 500 to realize the quantitative extraction and pushing of refrigerant without interrupting the process for weighing, which significantly improves the efficiency of multiple or large-scale filling. At the same time, the fully enclosed suction pipe 504 and delivery pipe 501 design reduces the influence of the external environment on the refrigerant and avoids the measurement error caused by environmental disturbance in the traditional weighing method.

[0022] The pushing component includes U-shaped frames 508 respectively installed on the back of the U-shaped frame 100 and located at corresponding positions of each set of piston cylinders 500. A second electric push rod 507 is fixedly installed on the surface of each set of U-shaped frames 508. The telescopic end of each set of second electric push rods 507 passes through the corresponding side U-shaped frame 508 and is fixedly connected to the end of the corresponding side piston cylinder 500. Through the setting of the pushing component, the linear displacement of the second electric push rod 507 is directly converted into the stroke of the piston disc 502, realizing precise control of the refrigerant extraction amount, avoiding the errors of repeated calibration and manual operation in the traditional weighing method. At the same time, by controlling the movement of different second electric push rods 507, the alternating or synchronous charging of different refrigerants can be realized, thus adapting to complex mixing requirements and avoiding the need to wait for the weighing equipment to stabilize before continuing operation in the traditional weighing method.

[0023] The detachable connector includes a first check valve 401 threadedly connected to each set of suction pipes 504. The output end of each set of first check valves 401 is connected to a suction pipe 400. The other end of each set of suction pipes 400 is rotatably fitted with a cap 402. The other end of each set of suction pipes 400 is threadedly connected to the output end of the corresponding side storage tank 101 through the cap 402. With the setting of the detachable connector, the setting of the first check valve 401 ensures unidirectional flow of refrigerant, prevents backflow during the extraction process, and improves the refrigerant delivery efficiency. At the same time, the cap 402 is threadedly connected to the output end of the storage tank 101, which facilitates the replacement and maintenance of the storage tank 101 and improves the flexibility of the equipment.

[0024] A fluororubber O-ring is added to the inside of the cap 402 to enhance sealing performance and effectively prevent refrigerant leakage.

[0025] The delivery pipe 501 includes delivery pipes 501 that are connected to each set of output holes 503. The output end of each set of delivery pipes 501 is connected to a second check valve 505. The output end of each set of second check valves 505 is connected to a manifold 506. The output ends of each set of manifolds 506 are connected together and connected to the input end of the filling head 206. Through the setting of the delivery pipe 501, the second check valve 505 ensures that the refrigerant can only flow to the filling head 206 during the pushing process, avoiding backflow to the piston cylinder 500. At the same time, the design of the manifold 506 realizes the centralized delivery of multiple refrigerants, providing a structural basis for mixed charging and simplifying the pipeline layout.

[0026] The moving component includes a placement plate 200 located below the filling head 206. The top of the placement plate 200 has a placement groove 202 for placing the dispensing tank 102. Connecting rods 201 are fixedly connected to the top of both sides of the placement plate 200. Connecting plates 203 are fixedly connected to the top of the two sets of connecting rods 201. A first electric push rod 205 is fixedly connected to the inner top wall of the U-shaped frame 100. The telescopic end of the first electric push rod 205 extends downward and is fixedly connected to the top of the connecting plate 203. Through the setting of the moving component, the placement plate 200 and the placement groove 202 provide stable support for the dispensing tank 102, ensuring accurate positioning during docking. At the same time, the connecting plate 203 driven by the first electric push rod 205 moves up and down, realizing automatic docking and separation of the dispensing tank 102 and the filling head 206, reducing human operation errors.

[0027] A controller 509 is fixedly installed on the back of the U-shaped frame 100. The first electric push rod 205 and the second electric push rod 507 are both controlled by the controller 509. The controller 509 controls the stroke of each second electric push rod 507 according to the preset mixing ratio to achieve precise mixing and charging of different refrigerants. The controller 509 has a touch screen. Through the settings of the controller 509, the integration of the controller 509 realizes the automated control of the equipment. By precisely controlling the stroke of each second electric push rod 507 according to the preset mixing ratio, the controller 509 has a touch screen interface to provide a user-friendly human-machine interaction, which makes it easy for operators to set parameters and monitor the charging process, reducing the difficulty of operation.

[0028] When the push rod moves, the encoder converts the displacement into an electrical signal, which is transmitted to the controller 509 in real time, thereby accurately controlling the push rod stroke.

[0029] The fasteners include mounting cylinders 300 that are fixedly inserted into the top of the U-shaped frame 100 and located at the corresponding positions of each set of storage tanks 101. The bottom of the mounting cylinder 300 has a through hole 302. The output end of the storage tank 101 is set downward and passes through the through hole 302. Each set of mounting cylinders 300 is threaded with a hand-tightening bolt 301 on one side. The end of each set of hand-tightening bolts 301 is threaded through the corresponding side mounting cylinder 300 and abuts against the surface of the corresponding side storage tank 101. By setting the hand-tightening bolts 301, tightening the hand-tightening bolts 301 can effectively prevent the storage tanks 101 from loosening due to vibration during equipment operation and improve system reliability.

[0030] Before the refrigerant is ready to be added, the dispensing tank 102 is placed on the placement plate 200. Then, the controller 509 controls the first electric push rod 205 to retract, which drives the connecting plate 203, connecting rod 201 and placement plate 200 to move upward, so that the input end of the dispensing tank 102 gradually approaches the filling head 206, so that the dispensing tank 102 and the filling head 206 are tightly connected.

[0031] When refrigerant needs to be filled, the controller 509 controls the second electric push rod 507 on the side of the corresponding storage tank 101 to retract, pulling the piston disc 502 to slide along the inside of the piston cylinder 500, increasing the space inside the piston cylinder 500, reducing the gas pressure and forming a negative pressure. At this time, the first check valve 401 connected to the suction pipe 504 above the end of the piston cylinder 500 opens. Since the pressure inside the storage tank 101 is higher than the pressure inside the piston cylinder 500, under the action of the pressure difference, the refrigerant flows into the piston cylinder 500 through the suction pipe 400. When the piston disc 502 slides to the set position, the second electric push rod 507 stops moving, completing the extraction of refrigerant.

[0032] After extraction is completed, the controller 509 controls the second electric push rod 507 to extend, pushing the piston disc 502 to slide in the opposite direction. The space inside the piston cylinder 500 decreases, the refrigerant is compressed, and the gas pressure increases. At this time, the first check valve 401 closes to prevent the refrigerant from flowing back to the storage tank 101. At the same time, the second check valve 505 at the output hole 503 below the end of the piston cylinder 500 opens. The compressed refrigerant flows through the delivery pipe 501 and the collection pipe 506 to the filling head 206, and from the filling head 206 flows into the dispensing tank 102, completing the refrigerant filling process.

[0033] Multiple refrigerants need to be mixed. The controller 509 can control the second electric push rod 507 corresponding to different storage tanks 101 to push the piston disc 502 according to the preset sequence and stroke, so that different refrigerants flow into the manifold 506 one after another or simultaneously. After being initially mixed in the manifold 506, they enter the filling head 206 to complete the mixing of multiple refrigerants.

[0034] After the refrigerant filling is completed, the first electric push rod 205 extends downward, causing the placement plate 200 to descend, separating the dispensing tank 102 from the filling head 206, so that the dispensing tank 102, which has been filled with refrigerant, can be removed.

[0035] This utility model embodiment utilizes the reciprocating motion of the piston cylinder 500 to achieve quantitative extraction and delivery of refrigerant without interrupting the process for weighing, significantly improving the efficiency of multiple or large-scale charging. At the same time, the fully enclosed design of the suction pipe 504 and delivery pipe 501 reduces the influence of the external environment on the refrigerant and avoids measurement errors caused by environmental disturbances in traditional weighing methods.

[0036] 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 mixed refrigerant filling regulation control device comprising a U-shaped frame (100), characterized in that: The top of the U-shaped frame (100) is connected by fasteners to several sets of storage tanks (101) for storing different refrigerants. A piston cylinder (500) is fixedly inserted into the back of the U-shaped frame (100) at a position corresponding to each set of storage tanks (101). A piston disc (502) is slidably connected inside each set of piston cylinders (500). A pushing component for pushing the corresponding piston disc (502) is provided on the back of the U-shaped frame (100). A suction pipe (504) is connected above the end of each set of piston cylinders (500). The input end of each suction pipe (504) is connected to the output end of the corresponding storage tank (101) via a detachable connector. An L-shaped plate (204) is fixedly connected to the upper inner wall of the U-shaped frame (100). A filling head (206) for refrigerant dispensing is fixedly installed at the bottom of the L-shaped plate (204). Each set of piston cylinders (500) has an output hole (503) below its end. Each set of output holes (503) is connected to a conveying pipe (501). The output ends of each set of conveying pipes (501) are connected together and simultaneously connected to the input end of the filling head (206) to inject different refrigerants into the dispensing tank (102). The U-shaped frame (100) is provided with an upward moving part that pushes the dispensing tank (102) upward so that its input end is connected to the output end of the filling head (206).

2. The mixed refrigerant charging regulation control device of claim 1, wherein: The pushing component includes a U-shaped frame (508) respectively installed on the back of the U-shaped frame (100) and located at the corresponding position of each set of piston cylinders (500). A second electric push rod (507) is fixedly installed on the surface of each set of U-shaped frames (508). The telescopic end of each set of second electric push rods (507) passes through the corresponding side U-shaped frame (508) and is fixedly connected to the end of the corresponding side piston cylinder (500).

3. The mixed refrigerant charging regulation control device of claim 2, wherein: The detachable connecting component includes a first check valve (401) threadedly connected to each set of suction tubes (504), the output end of each set of first check valves (401) is connected to a suction tube (400), the other end of each set of suction tubes (400) is rotatably fitted with a cap (402), and the other end of each set of suction tubes (400) is threadedly connected to the output end of the corresponding side storage tank (101) through the cap (402).

4. The mixed refrigerant charging and regulating control device of claim 3, wherein: The delivery pipe (501) includes delivery pipes (501) that are connected to each set of output holes (503). The output end of each set of delivery pipes (501) is connected to a second check valve (505). The output end of each set of second check valves (505) is connected to a manifold (506). The output ends of each set of manifolds (506) are connected together and connected to the input end of the filling head (206).

5. The mixed refrigerant charging and regulating control device according to claim 4, characterized in that: The moving component includes a placement plate (200) disposed below the filling head (206). The top of the placement plate (200) is provided with a placement slot (202) for placing the dispensing can (102). Connecting rods (201) are fixedly connected to the top of both sides of the placement plate (200). The top of the two sets of connecting rods (201) is fixedly connected to a connecting plate (203). A first electric push rod (205) is fixedly connected to the inner wall of the top of the U-shaped frame (100). The telescopic end of the first electric push rod (205) extends downward and is fixedly connected to the top of the connecting plate (203).

6. The mixed refrigerant charging and regulating control device according to claim 5, characterized in that: A controller (509) is fixedly installed on the back of the U-shaped frame (100). The first electric push rod (205) and the second electric push rod (507) are both controlled by the controller (509). The controller (509) controls the stroke of each second electric push rod (507) according to the preset mixing ratio to achieve precise mixing and charging of different refrigerants.

7. The mixed working fluid refrigerant charging and regulating control device according to claim 5, characterized in that: The fasteners include mounting cylinders (300) that are fixedly inserted into the top of the U-shaped frame (100) and located at the corresponding positions of each set of storage tanks (101). The bottom of the mounting cylinder (300) is provided with a through hole (302). The output end of the storage tank (101) is set downward and passes through the through hole (302). Each side of each set of mounting cylinders (300) is threaded with a hand-tightening bolt (301). The end of each set of hand-tightening bolts (301) is threaded through the corresponding side mounting cylinder (300) and abuts against the surface of the corresponding side storage tank (101).

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