A refrigerant recovery device for freon refrigerating unit maintenance

Abstract

The utility model discloses a refrigerant recovery device for freon refrigerating unit overhauls relates to technical field. The utility model discloses a freon temporary storage tank, lead into branch cylinder, lead out branch cylinder and dolly, the top of freon temporary storage tank is connected with pressure relief elbow and negative pressure elbow, the pressure relief elbow and negative pressure elbow are installed respectively with pressure relief valve and negative pressure valve, the negative pressure elbow is connected with negative pressure vacuum pump through the hose, the both sides wall of freon temporary storage tank is close to the top position and is equipped with air inlet pipe and liquid outlet pipe respectively, lead into branch cylinder includes cylindrical cylinder and multiple branch pipes, and the both sides symmetry of cylindrical cylinder are connected with multiple branch pipes. The utility model discloses a freon temporary storage tank to the refrigerating unit in -house fluorine of overhauls is recycled and is temporarily stored, and after the overhaul is completed, is arranged into the gas -liquid separator of refrigerating unit again, solves the current refrigerating unit overhauls and the serious waste of fluorine of outside row, and the cost higher problem of recycling.

Description

Technical Field

[0001] This utility model belongs to the field of Freon refrigeration unit maintenance technology, and in particular relates to a refrigerant recovery device for Freon refrigeration unit maintenance. Background Technology

[0002] During maintenance, Freon-cooled refrigeration units require isolation and depressurization to release the Freon into the atmosphere. Approximately 240 kg of Freon is released per unit during maintenance, causing environmental pollution and significant Freon loss. Freon release during maintenance also wastes refrigerant, increasing refrigerant procurement costs. Currently, Freon recovery is done manually by connecting hoses; improper connections pose safety risks and can introduce non-condensable gases into the system, reducing refrigeration efficiency. Furthermore, direct release of Freon into the atmosphere causes environmental pollution. Utility Model Content

[0003] The purpose of this invention is to provide a refrigerant recovery device for the maintenance of Freon refrigeration units. The device recovers and temporarily stores the Freon in the refrigeration unit during maintenance through a Freon temporary storage tank, and then discharges it into the gas-liquid separator of the refrigeration unit after maintenance. This solves the problems of serious waste of Freon discharged during the maintenance of existing refrigeration units and high cost of recovery.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a refrigerant recovery device for the maintenance of Freon refrigeration units, comprising a Freon temporary storage tank, an inlet branch cylinder, an outlet branch cylinder, and a trolley. The top of the Freon temporary storage tank is connected to a pressure relief bend and a negative pressure bend, respectively equipped with a pressure relief valve and a negative pressure valve. The negative pressure bend is connected to a negative pressure vacuum pump via a flexible hose. Inlet pipes and outlet pipes are respectively located on the side walls of the Freon temporary storage tank near the top. The outlet pipe is an L-shaped pipe with a [missing information - likely a design feature or design detail]. Near the bottom of the Freon temporary storage tank, the inlet branch cylinder and the outlet branch cylinder have the same structure. The inlet branch cylinder includes a cylindrical body and multiple branch pipes. One end of the cylindrical body is closed and the other end is connected to a connecting pipe. Multiple branch pipes are symmetrically connected to both sides of the cylindrical body. Each branch pipe is equipped with a branch valve. The connecting pipes on the inlet branch cylinder and the outlet branch cylinder are respectively spirally connected to the gas inlet pipe and the liquid outlet pipe. The Freon temporary storage tank is mounted on a trolley. The output end of the oil separator of each Freon refrigeration unit is connected to a branch pipe of the inlet branch cylinder through a pipeline, and the input end of the gas-liquid separator of each Freon refrigeration unit is connected to a second branch pipe of the outlet branch cylinder through a pipeline.

[0005] The present invention is further configured such that, before maintenance of all the Freon refrigeration units, all branch valves and second branch valves on the inlet branch cylinder and outlet branch cylinder are closed, the pressure relief valve is closed and the negative pressure valve is opened, the negative pressure vacuum pump evacuates the Freon temporary storage tank, the top of the Freon temporary storage tank is equipped with a pressure gauge communicating with the inside of the Freon temporary storage tank, and the negative pressure valve is closed after the Freon temporary storage tank is evacuated.

[0006] The present invention is further configured such that the capacity of the Freon temporary storage tank is at least the sum of the volumes of Freon in liquid state in eight Freon refrigeration units.

[0007] The present invention is further configured such that the sum of the volumes of the inlet branch cylinder and the outlet branch cylinder does not exceed 5% of the volume of the Freon temporary storage tank.

[0008] The present invention is further configured such that each Freon refrigeration unit is inspected one by one. When a Freon refrigeration unit is inspected, the branch valve on the branch pipe of its corresponding inlet branch cylinder is opened, and after the Freon is compressed and discharged into the Freon temporary storage tank, the branch valve on the corresponding branch pipe of the Freon refrigeration unit is closed. In this way, the Freon refrigeration units are inspected and Freon is recovered one by one.

[0009] The present invention is further configured such that the Freon temporary storage tank, the inlet branch cylinder and the outlet branch cylinder are all made of high-pressure resistant stainless steel, and the pipeline is a DN25 pipeline.

[0010] This utility model has the following beneficial effects: 1. This utility model utilizes a recycling system to collect and recycle Freon in a timely manner, avoiding refrigerant waste and thus achieving cost reduction and efficiency improvement. Simultaneously, the self-contained piping system eliminates the safety risks associated with manual hose connections and prevents direct release into the atmosphere, thus avoiding environmental pollution. The entire Freon recovery system is highly efficient, economical, and practical.

[0011] 2. This utility model can avoid refrigerant waste and environmental pollution by adding a recycling system. At the same time, it can reduce the need for Freon replacement after maintenance and before commissioning, thus reducing costs and increasing efficiency. It also reduces the need for manual connection of hoses, making it safer.

[0012] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a refrigerant recovery device used for the maintenance of a Freon refrigeration unit.

[0015] Figure 2 This is a schematic cross-sectional view of a Freon temporary storage tank.

[0016] Figure 3 A schematic diagram of the cross-sectional structure for introducing the branch cylinder.

[0017] The attached diagram lists the components represented by each number as follows: 1. Freon temporary storage tank; 11. Pressure gauge; 12. Pressure relief bend; 121. Pressure relief valve; 13. Negative pressure bend; 131. Negative pressure valve; 14. Air inlet pipe; 15. Liquid outlet pipe; 2. Inlet branch cylinder; 21. Branch pipe; 211. Branch valve; 22. Connecting pipe; 3. Outlet branch cylinder; 31. Second branch pipe; 311. Second branch valve; 4. Trolley. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3This utility model relates to a refrigerant recovery device for the maintenance of a Freon refrigeration unit, comprising a Freon temporary storage tank 1, an inlet branch cylinder 2, an outlet branch cylinder 3, and a trolley 4. The top of the Freon temporary storage tank 1 is connected to a pressure relief bend 12 and a negative pressure bend 13. Pressure relief valves 121 and negative pressure valves 131 are respectively installed on the pressure relief bend 12 and negative pressure bend 13. The negative pressure bend 13 is connected to a negative pressure vacuum pump via a flexible hose. Inlet pipes 14 and liquid outlet pipes 15 are respectively located on the side walls of the Freon temporary storage tank 1 near the top. The liquid outlet pipe 15 is an L-shaped pipe. The bottom end is located near the bottom of the Freon temporary storage tank 1. The inlet branch cylinder 2 and the outlet branch cylinder 3 have the same structure. The inlet branch cylinder 2 includes a cylindrical body and multiple branch pipes 21. One end of the cylindrical body is closed and the other end is connected to a connecting pipe 22. Multiple branch pipes 21 are symmetrically connected to both sides of the cylindrical body. Each branch pipe 21 is equipped with a branch valve 211. The connecting pipes on the inlet branch cylinder 2 and the outlet branch cylinder 3 are respectively spirally connected to the gas inlet pipe 14 and the liquid outlet pipe 15. The Freon temporary storage tank 1 is mounted on a trolley 4. The output end of the oil separator of each Freon refrigeration unit is connected to a branch pipe 21 of the inlet branch cylinder 2 via a pipe, and the input end of the gas-liquid separator of each Freon refrigeration unit is connected to the second branch pipe 31 of the outlet branch cylinder 3 via a pipe.

[0020] During maintenance, first assemble the Freon temporary storage tank 1, the inlet branch cylinder 2, and the outlet branch cylinder 3, then install the Freon temporary storage tank 1 on the trolley 4 and push it to the maintenance position.

[0021] First, connect the output end of the oil separator in each refrigeration unit to a branch pipe 21 of the inlet branch cylinder 2 via a pipeline. After the connection is completed, perform maintenance operations. Before maintenance, the Freon needs to be compressed into the Freon temporary storage tank 1. After all maintenance is completed (for the refrigeration units corresponding to Freon temporary storage tank 1), start the Freon return process. Freon is discharged into the gas-liquid separator of each refrigeration unit one by one through the branch cylinder 3 (since Freon is gaseous at room temperature, the pressure inside the tank is high, and the liquid Freon at the bottom is discharged with the liquid outlet pipe 15). The Freon recovery of each refrigeration unit is completed one by one. If the recovery waste leads to insufficient Freon, some refrigeration units will use a Freon replenishment process. Throughout the entire process, there must be no air in the Freon temporary storage tank 1 to prevent air from entering the Freon circulation system of the refrigeration unit.

[0022] Before maintenance of all the Freon refrigeration units, the branch valves 211 and 311 on the inlet branch cylinder 2 and outlet branch cylinder 3 are all closed, the pressure relief valve 121 is closed, the negative pressure valve 131 is opened, the negative pressure vacuum pump evacuates the Freon temporary storage tank 1, the top of the Freon temporary storage tank 1 is equipped with a pressure gauge 11 that communicates with the inside of the Freon temporary storage tank 1, and the negative pressure valve 131 is closed after the Freon temporary storage tank 1 is evacuated.

[0023] The maintenance units are inspected one by one, and the Freon is recovered one by one. Only one branch valve 211 is opened at a time to prevent Freon from flowing between the two branch valves 211 when they are open.

[0024] The capacity of the Freon temporary storage tank 1 is at least the sum of the volumes of Freon in liquid state within eight Freon refrigeration units. Some large refrigeration units may have more than 10 units, requiring batch recovery; otherwise, the Freon temporary storage tank 1 would be very large.

[0025] The sum of the volumes inside the inlet branch cylinder 2 and the outlet branch cylinder 3 shall not exceed 5% of the volume inside the Freon temporary storage tank 1. This is to prevent excessive Freon accumulation in the inlet branch cylinder 2 and the outlet branch cylinder 3, ensuring that the Freon inside the inlet branch cylinder 2 and the outlet branch cylinder 3 is primarily gaseous.

[0026] Each of the Freon refrigeration units is inspected and repaired sequentially. When a particular Freon refrigeration unit is under maintenance, the branch valve 211 on the branch pipe 21 of its corresponding inlet branch cylinder 2 is opened, and the Freon is compressed and discharged into the Freon temporary storage tank 1. Then, the branch valve 211 on the corresponding branch pipe 21 of that Freon refrigeration unit is closed. This process is repeated for each Freon refrigeration unit to ensure maintenance and Freon recovery. This method is safe and results in a high Freon recovery rate. Individual recovery also allows for easy monitoring of pressure changes within the Freon temporary storage tank 1, enabling timely cessation of recovery.

[0027] The Freon temporary storage tank 1, the inlet branch cylinder 2, and the outlet branch cylinder 3 are all made of high-pressure resistant stainless steel, and the pipeline is a DN25 pipeline. The DN25 pipeline is compatible with the actual refrigeration unit, and stainless steel is not easily corroded or deformed.

[0028] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A refrigerant recovery device for the maintenance of a Freon refrigeration unit, characterized in that: The system includes a Freon temporary storage tank (1), an inlet branch cylinder (2), an outlet branch cylinder (3), and a trolley (4). The top of the Freon temporary storage tank (1) is connected to a pressure relief bend (12) and a negative pressure bend (13). A pressure relief valve (121) and a negative pressure valve (131) are respectively installed on the pressure relief bend (12) and the negative pressure bend (13). The negative pressure bend (13) is connected to a negative pressure vacuum pump through a hose. An air inlet pipe (14) and a liquid outlet pipe (15) are respectively provided on the two side walls of the Freon temporary storage tank (1) near the top. The liquid outlet pipe (15) is an L-shaped pipe with its bottom end at the Freon temporary storage tank (1). The inner part near the bottom position, the inlet branch cylinder (2) and the outlet branch cylinder (3) have the same structure. The inlet branch cylinder (2) includes a cylindrical body and multiple branch pipes (21). One end of the cylindrical body is closed and the other end is connected to a connecting pipe (22). Multiple branch pipes (21) are symmetrically connected on both sides of the cylindrical body. Each branch pipe (21) is equipped with a branch valve (211). The connecting pipes on the inlet branch cylinder (2) and the outlet branch cylinder (3) are respectively spirally connected to the air inlet pipe (14) and the liquid outlet pipe (15). The Freon temporary storage tank (1) is installed on the trolley (4). The output end of the oil separator of each Freon refrigeration unit is connected to a branch pipe (21) of the inlet branch cylinder (2) through a pipe, and the input end of the gas-liquid separator of each Freon refrigeration unit is connected to the second branch pipe (31) of the outlet branch cylinder (3) through a pipe.

2. The refrigerant recovery device for overhauling a Freon refrigeration unit according to claim 1, characterized in that, Before maintenance, all the branch valves (211) and the second branch valve (311) on the inlet branch cylinder (2) and the outlet branch cylinder (3) of the Freon refrigeration unit are closed, the pressure relief valve (121) is closed and the negative pressure valve (131) is opened, the negative pressure vacuum pump evacuates the Freon temporary storage tank (1), the top of the Freon temporary storage tank (1) is equipped with a pressure gauge (11) that is connected to the inside of the Freon temporary storage tank (1), and the negative pressure valve (131) is closed after the Freon temporary storage tank (1) is evacuated.

3. The refrigerant recovery device for overhauling a Freon refrigeration unit according to claim 1, characterized in that, The capacity of the temporary Freon storage tank (1) is at least the sum of the volumes of Freon in the liquid state in eight Freon refrigeration units.

4. The refrigerant recovery device for overhauling a Freon refrigeration unit according to claim 1, characterized in that, The sum of the volumes inside the inlet branch cylinder (2) and the outlet branch cylinder (3) shall not exceed 5% of the volume inside the Freon temporary storage tank (1).

5. A refrigerant recovery device for overhauling a Freon refrigeration unit according to claim 1, characterized in that, Each Freon refrigeration unit is overhauled one by one. When a Freon refrigeration unit is overhauled, the branch valve (211) on the branch pipe (21) of the corresponding inlet branch cylinder (2) is opened, and the Freon is compressed and discharged into the Freon temporary storage tank (1). Then the branch valve (211) on the corresponding branch pipe (21) of the Freon refrigeration unit is closed. In this way, the Freon refrigeration units are overhauled and Freon is recovered one by one.

6. A refrigerant recovery device for overhauling a Freon refrigeration unit according to claim 1, characterized in that, The Freon temporary storage tank (1), the inlet branch cylinder (2) and the outlet branch cylinder (3) are all made of high-pressure resistant stainless steel, and the pipeline is a DN25 pipeline.

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