Efficient refrigerant recovery device

Abstract

The utility model discloses an efficient refrigerant recycling device, which belongs to the field of refrigerant recycling and comprises a refrigerant recycling machine body, a collecting pipe is connected to a collecting opening of the refrigerant recycling machine body, a tightening ring is connected to the collecting pipe in an external threaded manner, and a sealing ring is arranged on one side, close to the collecting pipe, of the tightening ring. A recycling head is fixedly mounted at the end, away from the refrigerant recycling machine body, of the collecting pipe. The sealing ring is arranged to be matched with the sealing plug, so that after a refrigerant is recycled, the driving extrusion state of the collecting sliding plug is removed by reversely rotating the sealing ring, and the collecting sliding plug moves towards the recycling head under the action of the compression spring and the arc-shaped filter screen, is attached to the conical surface groove and seals the collecting pipe, and a closed environment is formed; therefore, the situation that after recycling is completed, the refrigerant left in the collecting pipe leaks into the external environment, and air pollution is caused is avoided, and the effect of improving the environmental protection performance of the refrigerant recycling machine is achieved.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant recovery technology, and in particular to a high-efficiency refrigerant recovery device. Background Technology

[0002] Freon is commonly used as a refrigerant in refrigeration equipment such as air conditioners, refrigerators, and freezers. Before recycling refrigeration equipment, Freon needs to be recovered to prevent the condenser tubes from rupturing after recycling, which could lead to Freon leakage into the air and cause air pollution. At the same time, the recovered Freon can also be used as a refrigerant to fill new refrigeration equipment.

[0003] Currently, refrigerant recovery machines are commonly used to recover Freon refrigerant. During recovery, a connecting pipe is connected to the condenser pipe of the compressor, and a negative pressure environment is created in the connecting pipe by the compressor. This draws the refrigerant from the old refrigeration equipment into the refrigerant recovery machine, completing the refrigerant absorption operation. However, the connecting pipe of traditional refrigerant recovery equipment remains connected to the external environment after the recovery is completed. For example, in the high-efficiency, high-power refrigerant Freon rapid recovery machine with publication number CN218380017U, when the negative pressure environment is released from the connecting pipe (collection device) and it is disconnected from the condenser pipe, the Freon refrigerant inside the pipe leaks into the air, polluting the environment.

[0004] Therefore, a high-efficiency refrigerant recovery device is proposed. Utility Model Content

[0005] The purpose of this invention is to solve the problem that when the connecting pipes of existing refrigerant recovery equipment are disconnected from the negative pressure environment and the condenser tubes, the refrigerant Freon inside the pipes will leak into the air, causing environmental pollution. Therefore, this invention proposes a high-efficiency refrigerant recovery device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A refrigerant high-efficiency recovery device includes a refrigerant recovery machine body, a collection pipe connected to the collection port of the refrigerant recovery machine body, a tightening ring connected to the external thread of the collection pipe, a closing ring provided on the side of the tightening ring near the collection pipe, and a recovery head fixedly installed at the end of the collection pipe away from the refrigerant recovery machine body. A collection slide is provided inside the collection pipe, and a sealing drive strip is fixed on the outer surface of the collection slide.

[0008] Preferably, the recovery head is provided with a conical groove, and the collecting slide plug is provided with a sealing plug adapted to the conical groove on the side near the recovery head.

[0009] Preferably, a filter screen is provided inside the collection tube, and a compression spring is fixed to the filter screen near the collection slide.

[0010] Preferably, the recovery head is provided with a sealing elastic plug, and the recovery head is composed of multiple rotationally symmetrically arranged inclined sealing strips, the outer side of the inclined sealing strips contacting and connecting with the inner side of the tightening ring.

[0011] Preferably, the closed drive bar is slidably connected to the collection tube in a sealed manner, and a drive post that contacts and connects with the closed ring is fixed on the outer side of the closed drive bar.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By setting up a recovery head and tightening ring, the connection between the collection pipe and the condenser pipe of the refrigeration equipment can be sealed to prevent refrigerant from leaking into the external environment and causing air pollution during the recovery process, thereby improving the sealing performance of the collection pipe during recovery.

[0014] 2. By setting up a closed ring in conjunction with a sealing plug, after the refrigerant recovery is complete, the closed ring can be rotated in the opposite direction to release the driving and squeezing state of the collection slide plug. Under the action of the compression spring and the arc-shaped filter screen, it moves towards the recovery head and fits against the conical groove, sealing the collection tube and forming a closed environment. This prevents the refrigerant remaining in the collection tube from leaking into the external environment after the recovery is complete, thus avoiding air pollution and improving the environmental performance of the refrigerant recovery machine. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency refrigerant recovery device proposed in this utility model;

[0016] Figure 2 This is a structural assembly view of the collecting pipe, collecting ring, and collecting slide plug in a refrigerant high-efficiency recovery device proposed in this utility model;

[0017] Figure 3 This is a cross-sectional view of the internal structure of the collection pipe in a high-efficiency refrigerant recovery device proposed in this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the collection pipe and the recovery head in a high-efficiency refrigerant recovery device proposed in this utility model;

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the tightening ring, the inclined sealing strip, and the sealing elastic plug in a refrigerant high-efficiency recovery device proposed in this utility model.

[0021] In the diagram: 1. Refrigerant recovery unit body; 2. Collection pipe; 21. Recovery head; 211. Inclined sealing bar; 22. Sealing elastic plug; 3. Tightening ring; 31. Sealing ring; 4. Collection slide plug; 41. Sealing drive bar; 411. Drive column; 42. Sealing plug; 5. Filter screen; 51. Compression spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-6 A refrigerant high-efficiency recovery device includes a refrigerant recovery machine body 1, a collection pipe 2 connected to the collection port of the refrigerant recovery machine body 1, a tightening ring 3 connected to the external thread of the collection pipe 2, a closing ring 31 provided on the side of the tightening ring 3 near the collection pipe 2, and a recovery head 21 fixedly installed at the end of the collection pipe 2 away from the refrigerant recovery machine body 1, a collection slide 4 provided inside the collection pipe 2, and a closing drive strip 41 fixed on the outer surface of the collection slide 4.

[0024] It should be noted that: the refrigerant recovery unit 1 is equipped with a compressor. When the compressor is started, a negative pressure environment can be formed in the collection pipe 2. This is the working process of the existing refrigerant recovery device to absorb refrigerant under negative pressure. The description of how the collection pipe 2 forms a negative pressure environment will not be repeated in the following description.

[0025] Based on the above, when recovering refrigerant, the condenser tube is inserted into the recovery head 21, and the recovery joint is locked and sealed by the tightening ring 3. The condenser tube is made of a rigid metal material, which is the metal condenser tube in existing refrigeration equipment. The condenser tube opening will not shrink when the tightening ring 3 tightens the recovery head 21.

[0026] Specifically, a closed elastic plug 22 is provided inside the recovery head 21, and the recovery head 21 is composed of multiple rotationally symmetrically arranged inclined sealing strips 211, with the outer side of the inclined sealing strips 211 contacting and connecting with the inner side of the tightening ring 3.

[0027] It should be noted that when the rotating tightening ring 3 squeezes the inclined sealing strip 211, the inclined sealing strip 211 can shrink towards the axis of the recovery head 21 and squeeze the sealing elastic plug 22 to fit against the pipe opening of the condenser tube, so that the connection between the collection pipe 2 and the pipe opening of the condenser tube forms a closed recovery environment, preventing the refrigerant from leaking into the external environment during the recovery process and causing environmental pollution.

[0028] Specifically, a conical groove is provided inside the recovery head 21, and a sealing plug 42 adapted to the conical groove is provided on the side of the collection slide 4 near the recovery head 21. A filter screen 5 is provided inside the collection pipe 2, and a compression spring 51 is fixed on the side of the filter screen 5 near the collection slide 4. The filter screen 5 is arc-shaped, which can deform when the mesh is blocked, changing the curvature of the refrigerant filter surface, thereby changing the filtration path of the refrigerant, i.e., the filtration channel of the filter screen 5. This allows the refrigerant to flow to the refrigerant recovery machine body 1 from the new filtration path, thereby improving the filtration efficiency in refrigerant recovery. At the same time, the filter screen 5 can also be deformed by the collection slide 4 driven by the sealing ring 31, changing the filtration path of the refrigerant and achieving the same effect as above.

[0029] Furthermore, the closed drive bar 41 is slidably connected to the collection tube 2, and a drive post 411 that contacts and connects with the closed ring 31 is fixed on the outside of the closed drive bar 41.

[0030] It should be noted that after the collecting pipe 2 is connected and sealed to the condenser pipe opening, the rotation of the tightening ring 3 can cause the sealing ring 31 to move towards the refrigerant recovery machine body 1. This causes the sealing ring 31 to squeeze the drive column 411 and drive the sealing drive bar 41 to move in the same direction, so that the sealing plug 42 of the collecting slide plug 4 is removed from the conical groove, allowing the refrigerant to flow from the collecting pipe 2 into the refrigerant recovery machine body 1.

[0031] Based on the above, after the refrigerant recovery is completed, the compression state of the compression drive column 411 is released by rotating the tightening ring 3 in the opposite direction. With the help of the arc-shaped filter screen 5 and the compression spring 51, when the sealing ring 31 releases the compression drive state of the drive column 411, it drives the sealing plug 42 to fit against the conical groove of the recovery head 21, thereby sealing the recovery channel of the recovery head 21 and closing the connection channel between the collection pipe 2 and the outside world, so as to prevent the recovered refrigerant from leaking from the collection pipe 2 into the external environment and causing environmental pollution.

[0032] Working principle:

[0033] When this utility model is in use, by rotating the tightening ring 3 to squeeze the inclined sealing strip 211, the inclined sealing strip 211 can be contracted towards the axis of the recovery head 21, and the sealing elastic plug 22 is squeezed to fit against the pipe opening of the condenser tube, so that a closed recovery environment is formed at the connection between the collection tube 2 and the condenser tube opening, avoiding refrigerant leakage to the external environment during the recovery process and causing environmental pollution, thereby completing the closed connection operation between the collection tube 2 and the condenser tube;

[0034] Based on the above, after the collecting pipe 2 is connected and sealed to the condenser pipe opening, the rotation of the tightening ring 3 can cause the sealing ring 31 to move towards the refrigerant recovery machine body 1. Thus, the sealing ring 31 squeezes the drive column 411 and drives the sealing drive bar 41 to move in the same direction, so that the sealing plug 42 of the collecting slide plug 4 is removed from the conical groove, allowing the refrigerant to flow from the collecting pipe 2 into the refrigerant recovery machine body 1.

[0035] Furthermore, after the refrigerant recovery is complete, the compression state of the compression drive column 411 is released by rotating the tightening ring 3 in the opposite direction. With the help of the arc-shaped filter screen 5 and the compression spring 51, when the sealing ring 31 releases the compression drive state of the drive column 411, it drives the sealing plug 42 to fit against the conical groove of the recovery head 21, thereby sealing the recovery channel of the recovery head 21 and closing the connection channel between the collection pipe 2 and the outside world, so as to prevent the recovered refrigerant from leaking from the collection pipe 2 into the external environment and causing environmental pollution.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency refrigerant recovery device, comprising a refrigerant recovery unit (1), characterized in that, The refrigerant recovery machine body (1) is connected to a collection pipe (2) at the collection port. The collection pipe (2) is connected to a tightening ring (3) by an external thread. A closing ring (31) is provided on the side of the tightening ring (3) close to the collection pipe (2). A recovery head (21) is fixedly installed at the end of the collection pipe (2) away from the refrigerant recovery machine body (1). A collection slide (4) is provided inside the collection pipe (2). A closed drive strip (41) is fixed on the outer surface of the collection slide (4).

2. The refrigerant high-efficiency recovery device according to claim 1, characterized in that, The recovery head (21) is provided with a conical groove, and the collection slide (4) is provided with a sealing plug (42) that is adapted to the conical groove on the side near the recovery head (21).

3. The refrigerant high-efficiency recovery device according to claim 1, characterized in that, The collection tube (2) is equipped with a filter screen (5), and a compression spring (51) is fixed to the side of the filter screen (5) near the collection slide (4).

4. The refrigerant high-efficiency recovery device according to claim 1, characterized in that, The recovery head (21) is provided with a closed elastic plug (22), and the recovery head (21) is composed of multiple rotationally symmetrically arranged inclined sealing strips (211), the outer side of the inclined sealing strips (211) is in contact with the inner side of the tightening ring (3).

5. The refrigerant high-efficiency recovery device according to claim 1, characterized in that, The closed drive bar (41) is slidably connected to the collection tube (2), and a drive column (411) that contacts and connects with the closed ring (31) is fixed on the outside of the closed drive bar (41).

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