Jet pump for oil return of compressor of central air conditioning unit

Abstract

The utility model relates to the technical field of jet pumps, and discloses a jet pump for oil return of a central air conditioning unit compressor, which comprises a pump body, an oil inlet pipe is fixedly connected to the left side of the bottom end of the pump body, connecting pipelines are detachably connected to two ends of the pump body, and oil-proof components are fixedly connected to the left side and the right side of the inner wall of the pump body. And an inner ring is fixedly connected to the inner wall of the oil-proof assembly, a groove is formed in the inner ring, a rubber pad is slidably connected to the inner wall of the groove, a limiting block is fixedly connected to one side of the rubber pad, a plurality of springs are arranged in the groove, and clamping rings are fixedly connected to the inner walls of the sides, close to each other, of the two connecting pipelines. According to the injection pump, under extrusion of the connecting pipeline, the rubber pad is stressed to apply pressure inwards, so that the limiting block is driven to extrude the spring to generate counter-acting force, the rubber pad is attached to the inner wall of the connecting pipeline more tightly, the sealing performance of the injection pump is improved, and the risk of oil leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ejector pumps, in particular to an ejector pump for oil return of a compressor of a central air-conditioning unit. Background Art

[0002] The ejector pump technology is a fluid dynamics application that uses high-speed fluid (power flow) to generate a low-pressure area through a nozzle, attracting and driving low-speed fluid (ejected flow) to mix, and realize fluid transportation or circulation through energy exchange. This technology is widely used in heating, cooling, water treatment and other systems, improving the efficiency of equipment and achieving energy saving.

[0003] After searching, Chinese patent announcement number: CN208518976U discloses an ejector pump, including: a driving pipeline, a high-pressure chamber connected to the driving pipeline, a second nozzle formed at the liquid outflow end of the high-pressure chamber, an oil suction chamber, a mixing pipeline, a diffusion pipeline, and a first nozzle is also arranged inside the driving pipeline. According to the ejector pump of the utility model, the working efficiency of the ejector pump in a hot oil environment can be effectively improved, and the oil suction capacity of the ejector pump is guaranteed.

[0004] The beneficial effects in the above patent specification mention that "it has a double nozzle structure. In a hot oil environment, the pressure in the negative pressure zone in the mixing pipe is significantly improved, and the area of ​​the negative pressure zone is significantly reduced, which effectively improves the working efficiency of the ejector pump in a hot oil environment and ensures the oil suction capacity of the ejector pump." Although the above patent ensures the oil suction capacity of the ejector pump by designing a double nozzle structure, it is unable to effectively seal the ejector pump during specific use, which causes oil leakage when the staff uses the oil return device. For this reason, it is proposed to use an ejector pump for the oil return of the compressor of a central air-conditioning unit to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an ejector pump for oil return of the compressor of a central air-conditioning unit, aiming to improve the problem that the ejector pump cannot be effectively sealed in the prior art, which causes oil leakage when the staff uses the oil return device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The priming pump for oil return of the compressor of the central air-conditioning unit comprises a pump body, an oil inlet pipe is fixedly connected to the left side of the bottom end of the pump body, connecting pipes are detachably connected to both ends of the pump body, oil-proof components are fixedly connected to the left and right sides of the inner wall of the pump body, an inner ring is fixedly connected to the inner wall of the oil-proof component, a groove is provided inside the inner ring, a rubber pad is slidably connected to the inner wall of the groove, a limiting block is fixedly connected to one side of the rubber pad, a plurality of springs are arranged inside the groove, a clamping ring is fixedly connected to the inner wall of the adjacent side of the two connecting pipes, a plurality of clamping blocks are fixedly connected to the outer wall of the inner ring, the clamping ring and the plurality of clamping blocks are in a clamping relationship, the bottom end of the oil inlet pipe is fixedly connected to the oil delivery pipe, the outer ends of the pump body and the outer side of the connecting pipe are fixedly connected to the sealing components, and the top of the sealing component is fixedly connected to the connecting component;

[0008] As a further description of the above technical solution:

[0009] The oil-proof component comprises an oil-proof layer, and the outer portions of the two oil-proof layers are respectively fixedly connected to the left and right sides of the inner wall of the pump body;

[0010] As a further description of the above technical solution:

[0011] The sealing assembly includes a sealing ring, and the inner walls of the plurality of sealing rings are respectively fixedly connected to the two ends of the outside of the pump body and the outer side of the connecting pipe;

[0012] As a further description of the above technical solution:

[0013] The connecting assembly comprises a bottom block, the bottom end of which is fixedly connected to the top end of the sealing ring, the inner wall of the bottom block is fixedly connected to a rotating shaft, the outer side of the rotating shaft is rotatably connected to a supporting block, the other end of the supporting block is fixedly connected to a threaded rod, and the outer sides of the two threaded rods are threadedly connected to threaded sleeves;

[0014] As a further description of the above technical solution:

[0015] The outer portion of the limit block is slidably connected to the inner wall of the groove, and the outer portion of the rubber pad is in contact with the inner wall of the connecting pipe;

[0016] As a further description of the above technical solution:

[0017] One end of the spring is fixedly connected to one side of the groove, and the other end of the spring is fixedly connected to one side of the limit block;

[0018] As a further description of the above technical solution:

[0019] The outer side of the clamping block is slidably connected to the inner wall of the connecting pipe, and the outer side of the supporting block is rotatably connected to the inner wall of the bottom block;

[0020] As a further description of the above technical solution:

[0021] The adjacent sides of the two threaded rods are in contact with each other, and the adjacent sides of the two sealing rings are in contact with each other.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, when installing the ejector pump, the pump body together with the oil-proof layer, the rubber pad and the clamping block are first inserted into the connecting pipe. At this time, the clamping block will first be engaged with the clamping ring, and then under the extrusion of the connecting pipe, the rubber pad is forced to be pressed inward, thereby driving the spring inside the limit block to squeeze the groove, so that it generates a reaction force, so that the rubber pad fits more tightly with the inner wall of the connecting pipe, thereby improving the sealing of the ejector pump and reducing the risk of oil leakage.

[0024] 2. In the utility model, when the pump body and the connecting pipe are connected, the pump body and the connecting pipe can be aligned first, then the support block is pinched, and then the threaded sleeve is screwed onto one of the threaded rods, and then the support block is rotated around the rotating shaft on the bottom block. When the two threaded rods are aligned, the threaded sleeve can be rotated to the junction of the two threaded rods, and the connection of the pipe can be completed, which greatly improves the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional schematic diagram of an ejector pump for oil return of a compressor of a central air-conditioning unit proposed by the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the oil-proof layer of the ejector pump for oil return of the compressor of the central air-conditioning unit proposed by the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the spring of the ejector pump for oil return of the compressor of the central air-conditioning unit proposed by the utility model;

[0028] Figure 4 The utility model is a schematic structural diagram of a threaded sleeve of an ejector pump for oil return of a compressor of a central air-conditioning unit.

[0029] Legend:

[0030] 1. Pump body; 2. Oil inlet pipe; 3. Connecting pipe; 4. Oil-proof layer; 5. Inner ring; 6. Groove; 7. Rubber pad; 8. Limit block; 9. Spring; 10. Snap ring; 11. Block; 12. Oil pipeline; 13. Sealing ring; 14. Bottom block; 15. Rotating shaft; 16. Support block; 17. Threaded rod; 18. Threaded sleeve. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-Figure 2 The utility model provides an embodiment: an induced pump for oil return of a compressor of a central air-conditioning unit, comprising a pump body 1, an oil inlet pipe 2 is fixedly connected to the left side of the bottom end of the pump body 1, the oil inlet pipe 2 here is used to transport the extracted lubricating oil to the inside of the pump body 1, both ends of the pump body 1 are detachably connected with connecting pipes 3, the left and right sides of the inner wall of the pump body 1 are fixedly connected with oil-proof components, the oil-proof components include an oil-proof layer 4, the oil-proof layer 4 here is mainly used to prevent the leakage of the lubricating oil during pumping.

[0033] Reference Figure 2-Figure 3 The outsides of the two oil-proof layers 4 are fixedly connected to the left and right sides of the inner wall of the pump body 1 respectively, and the inner wall of the oil-proof component is fixedly connected with an inner ring 5, and the oil-proof component here provides stable support for the inner ring 5. A groove 6 is opened inside the inner ring 5, and a rubber pad 7 is slidably connected to the inner wall of the groove 6. The outside of the rubber pad 7 contacts the inner wall of the connecting pipe 3. The rubber pad 7 here fits tightly with the inner wall of the connecting pipe 3, which can effectively prevent gas leakage. One side of the rubber pad 7 is fixedly connected to a limiting block 8.

[0034] Reference Figure 2-Figure 4 The outside of the limit block 8 is slidably connected to the inner wall of the groove 6. The limit block 8 here is mainly used to prevent the rubber pad 7 from detaching. A plurality of springs 9 are arranged inside the groove 6. One end of the spring 9 is fixedly connected to one side of the groove 6, and the other end of the spring 9 is fixedly connected to one side of the limit block 8. The spring 9 here can give a reaction force to the connecting pipe 3 and the rubber pad 7 under the extrusion, so that the extrusion is tighter. The inner walls of the adjacent sides of the two connecting pipes 3 are fixedly connected with a clamping ring 10.

[0035] Reference Figure 1-Figure 2 The outer wall of the inner ring 5 is fixedly connected with a plurality of blocks 11, and the locking ring 10 is in a locking relationship with the plurality of blocks 11. The blocks 11 here are made of thermoplastic polyurethane material, which has good toughness and elasticity. Therefore, when installing or disassembling the pump body 1 and the connecting pipe 3, the blocks 11 here will be deformed accordingly, so that the two can be quickly disassembled. The outer side of the block 11 is slidably connected to the inner wall of the connecting pipe 3, and the bottom end of the oil inlet pipe 2 is fixedly connected with the oil delivery pipe 12.

[0036] Reference Figure 1 and Figure 4 The outer ends of the pump body 1 and the outer side of the connecting pipe 3 are fixedly connected with sealing components. The sealing components here are used to isolate the outside from the inside of the pump body 1. The sealing components include sealing rings 13. The inner walls of multiple sealing rings 13 are respectively fixedly connected to the outer ends of the pump body 1 and the outer side of the connecting pipe 3. The adjacent sides of the two sealing rings 13 are in contact. The top of the sealing component is fixedly connected with a connecting component. The connecting component here makes the connecting pipe 3 and the pump body 1 more stable after connection to prevent shaking and loosening.

[0037] Reference Figure 4 The connecting assembly includes a bottom block 14, the bottom end of the bottom block 14 is fixedly connected to the top of the sealing ring 13, and the inner wall of the bottom block 14 is fixedly connected with a rotating shaft 15. The bottom block 14 here provides a stable support for the rotating shaft 15, and the external rotation of the rotating shaft 15 is connected with a support block 16, and the external rotation of the support block 16 is connected to the inner wall of the bottom block 14. The other end of the support block 16 is fixedly connected with a threaded rod 17. The support block 16 here can drive the threaded rod 17 to rotate together when rotating, and the adjacent sides of the two threaded rods 17 are in contact. The external threads of the two threaded rods 17 are connected with threaded sleeves 18. The threaded sleeves 18 here can connect the two threaded rods 17 together, further tightening the pump body 1 and the connecting pipe 3 to make it more stable.

[0038] Working principle: When the oil return device of the central air-conditioning unit compressor starts to operate, gas will be output from the left connecting pipe 3, and then the lubricating oil can be drawn from the oil pipe 12 and enter the interior of the pump body 1 from the oil inlet pipe 2, and at the same time, it is output from the right side of the pump body 1 along with the gas and enters another connecting pipe 3.

[0039] When installing the pump body 1 and the connecting pipe 3, first insert the two ends of the pump body 1 into the interfaces of the two connecting pipes 3 respectively, and then the locking ring 10 will quickly engage with the locking block 11. At this time, the rubber pad 7 will be squeezed by the connecting pipe 3, causing it to further squeeze the limit block 8 in the groove 6. At the same time, the spring 9 begins to shrink under the squeezing of the groove 6 and the limit block 8, and at the same time provides a reaction force for the rubber pad 7, so that it fits more closely with the inner wall of the connecting pipe 3, thereby improving the sealing and preventing the risk of oil leakage and air leakage.

[0040] When it is necessary to achieve docking between the pump body 1 and the connecting pipe 3, the pump body 1 can be firstly aligned with the connecting pipe 3. The sealing ring 13 here also plays a sealing role. At this time, the threaded sleeve 18 can be firstly wound around one of the threaded rods 17, and then the support block 16 can be pulled to rotate it around the rotating shaft 15 on the bottom block 14 so that the two threaded rods 17 are aligned. At this time, the threaded rod 17 can be rotated to the connection point of the two threaded rods 17 to achieve docking between the pump body 1 and the connecting pipe 3, thereby improving the stability of the device.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A central air conditioning unit compressor oil return jet pump, comprising a pump body (1), characterized in that: The left side of the bottom end of the pump body (1) is fixedly connected to an oil inlet pipe (2), and both ends of the pump body (1) are detachably connected to connecting pipes (3). The left and right sides of the inner wall of the pump body (1) are fixedly connected to oil-proof components, and the inner wall of the oil-proof component is fixedly connected to an inner ring (5), and a groove (6) is provided inside the inner ring (5). A rubber pad (7) is slidably connected to the inner wall of the groove (6), and a limiting block (8) is fixedly connected to one side of the rubber pad (7). The groove (6) is provided with a A plurality of springs (9); the inner walls of the adjacent sides of the two connecting pipes (3) are fixedly connected with a clamping ring (10); the outer wall of the inner ring (5) is fixedly connected with a plurality of clamping blocks (11); the clamping ring (10) and the plurality of clamping blocks (11) are in a clamping relationship; the bottom end of the oil inlet pipe (2) is fixedly connected with an oil delivery pipe (12); the outer ends of the pump body (1) and the outer side of the connecting pipe (3) are fixedly connected with a sealing assembly; the top end of the sealing assembly is fixedly connected with a connecting assembly.

2. The central air conditioning unit compressor oil return jet pump according to claim 1, characterized in that: The oil-proof component comprises an oil-proof layer (4), and the exteriors of the two oil-proof layers (4) are respectively fixedly connected to the left and right sides of the inner wall of the pump body (1).

3. The central air conditioning unit compressor oil return jet pump according to claim 1, characterized in that: The sealing assembly comprises a sealing ring (13), and the inner walls of a plurality of the sealing rings (13) are respectively fixedly connected to the two ends of the outside of the pump body (1) and the outer side of the connecting pipe (3).

4. The central air conditioning unit compressor oil return jet pump according to claim 3, characterized in that: The connecting assembly comprises a bottom block (14), the bottom end of the bottom block (14) is fixedly connected to the top end of the sealing ring (13), the inner wall of the bottom block (14) is fixedly connected to a rotating shaft (15), the outside of the rotating shaft (15) is rotatably connected to a supporting block (16), the other end of the supporting block (16) is fixedly connected to a threaded rod (17), and the external threads of the two threaded rods (17) are connected to threaded sleeves (18).

5. The central air conditioning unit compressor oil return jet pump according to claim 1, characterized in that: The outside of the limit block (8) is slidably connected to the inner wall of the groove (6), and the outside of the rubber pad (7) is in contact with the inner wall of the connecting pipe (3).

6. The central air conditioning unit compressor oil return jet pump according to claim 1, characterized in that: One end of the spring (9) is fixedly connected to one side of the groove (6), and the other end of the spring (9) is fixedly connected to one side of the limit block (8).

7. The central air conditioning unit compressor oil return jet pump according to claim 4, characterized in that: The outer side of the clamping block (11) is slidably connected to the inner wall of the connecting pipe (3), and the outer side of the supporting block (16) is rotationally connected to the inner wall of the bottom block (14).

8. The central air conditioning unit compressor oil return jet pump according to claim 4, characterized in that: The adjacent sides of the two threaded rods (17) are in contact with each other, and the adjacent sides of the two sealing rings (13) are in contact with each other.

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