Gas-liquid separator capable of dynamically and automatically changing oil return position

Abstract

The utility model discloses a gas-liquid separator capable of dynamically and automatically changing an oil return position, which comprises a barrel, a gas inlet pipe and a gas outlet pipe, one end of the gas inlet pipe is inserted into the barrel to be fixedly connected with the barrel, one end of the gas outlet pipe is inserted into the barrel to be fixedly connected with the barrel, the gas-liquid separator further comprises an oil return assembly, and the oil return assembly comprises a floater and an oil return pipe. The floater is communicated with the oil return pipe, a coaxial oil return hole is formed in the air outlet pipe, and the oil return pipe is inserted into the oil return hole and rotates around the axis of the oil return hole. As the floater can be always above the oil level, the oil return position can be automatically changed according to the liquid level, and oil return is stable; the oil return assembly is simple in structure, easy to implement, low in cost and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner gas-liquid separators, in particular to a gas-liquid separator with a dynamically and automatically changed oil return position. Background Art

[0002] At low temperatures, the solubility of oil is lower than that of the refrigerant, and the oil will accumulate more on the upper surface of the liquid refrigerant. In existing traditional gas-liquid separators, the oil return holes are usually set at a lower position of the gas-liquid separator. When the refrigerant volume is high, less oil returns to the compressor; in the existing multi-channel oil return float type gas-liquid separator, a large number of oil return holes are set, and different oil return holes are selected according to the load. This structure cannot achieve linear adjustment of the oil return holes, and judging the oil level by the load may cause failure of oil return if the judgment is inaccurate; moreover, a large number of oil return components are externally placed, resulting in a large amount of consumables, high cost, low adjustment accuracy, and great potential safety hazards. Summary of the Utility Model

[0003] The utility model provides a gas-liquid separator with a dynamically and automatically changed oil return hole position, and the main purpose is to realize linear automatic adjustment of the oil return position with a simple and easy-to-produce structure.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: a gas-liquid separator with a dynamically and automatically changed oil return hole position, including a cylinder body, an air inlet pipe, and an air outlet pipe. One end of the air inlet pipe is inserted into the cylinder body and fixedly connected to the cylinder body. One end of the air outlet pipe is inserted into the cylinder body and fixedly connected to the cylinder body. It is characterized in that: it includes an oil return assembly, the oil return assembly includes a float and an oil return pipe, the float is communicated with the oil return pipe, a coaxial oil return hole is opened on the air outlet pipe, and the oil return pipe is inserted into the oil return hole and rotates around the axis of the oil return hole.

[0005] Preferably, the oil return pipe is T-shaped.

[0006] Preferably, the oil return pipe includes a first pipe fitting, a second pipe fitting, a third pipe fitting, and a tee joint. One end of the first pipe fitting is inserted into the float and connected to the float, and the other end is connected to the tee joint. One end of the second pipe fitting is connected to the tee joint, and the other end is inserted into the oil return hole. One end of the third pipe fitting is connected to the tee joint, and the other end is inserted into the oil return hole.

[0007] Preferably, the oil return pipe includes a first pipe fitting and a second pipe fitting. A hole is opened at the central position of the second pipe fitting along the length direction to connect one end of the first pipe fitting, and the other end of the first pipe fitting is connected to the float.

[0008] Preferably, the oil return assembly further includes a first U-shaped pipe and a second U-shaped pipe, and the first U-shaped pipe and the second U-shaped pipe are respectively connected to two ports of the oil return pipe.

[0009] Preferably, the oil return assembly further includes a filter screen, and the filter screen is fixed on the outer surface of the float.

[0010] Preferably, the oil return assembly further includes a fixing bracket which is fixed on the air outlet pipe and located above the oil return assembly.

[0011] Preferably, the upper end of the cylinder body is provided with an upper end cover, and the lower end is provided with a lower end cover. The air inlet pipe is fixed to the upper end cover through a steel sleeve, and the air outlet pipe is also fixed to the upper end cover through a steel sleeve.

[0012] Preferably, a base is further included, and the lower end cover is located above the base.

[0013] Preferably, the float has a hollow structure with an oil return pipeline inside.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: Since the float can always be above the oil surface, the oil return position can be automatically changed according to the liquid level, and the oil return is stable; the structure of the oil return assembly is simple, easy to implement, low in cost and has stability. Brief Description of the Drawings

[0015] Figure 1 It is an external structure diagram of the gas-liquid separator for dynamically and automatically changing the oil return position of the present utility model.

[0016] Figure 2 It is an internal structure diagram of the gas-liquid separator for dynamically and automatically changing the oil return position of the present utility model.

[0017] Figure 3 It is a structure diagram of the oil return assembly of Embodiment 1.

[0018] Figure 4 It is a cross-sectional view of the oil return assembly of Embodiment 1.

[0019] Figure 5 It is a structure diagram of the oil return assembly of Embodiment 2.

[0020] Figure 6 It is a structure diagram of the oil return assembly of Embodiment 3.

[0021] In the figure: cylinder body 1, air inlet pipe 2, air outlet pipe 3, oil return assembly 4, float 41, oil return pipe 42, filter screen 43, fixing bracket 44, first pipe fitting 421, second pipe fitting 422, third pipe fitting 423, tee joint 424, upper end cover 5, lower end cover 6, steel sleeve 7, base 8, first U-shaped pipe 431, second U-shaped pipe 432. Detailed Description of the Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1

[0024] Please refer to Figures 1-4 , the present utility model provides the following technical solutions: A gas-liquid separator with a dynamically and automatically changeable oil return hole position, including a cylinder body 1, an air inlet pipe 2, and an air outlet pipe 3. One end of the air inlet pipe 1 is inserted into the cylinder body 1 and fixedly connected to the cylinder body 1. One end of the air outlet pipe 3 is inserted into the cylinder body 1 and fixedly connected to the cylinder body 1. It includes an oil return assembly 4. The oil return assembly 4 includes a float 41 and an oil return pipe 42. The float 41 is communicated with the oil return pipe 42. The air outlet pipe 3 is provided with coaxially arranged oil return holes 30. The oil return pipe 42 is inserted into the oil return holes 30 and rotates around the axis of the oil return holes 30. The part of the air outlet pipe 3 inside the cylinder body 1 in this embodiment is a U-shaped structure, and the oil return holes 30 are symmetrically arranged in pairs, which is convenient for the installation of the oil return pipe 42.

[0025] The oil return pipe 42 in this embodiment is T-shaped. The oil return pipe 42 includes a first pipe fitting 421, a second pipe fitting 422, a third pipe fitting 423, and a tee 424. One end of the first pipe fitting 421 is inserted into the float 41 and connected to the float 41, and the other end is connected to the tee 424. One end of the second pipe fitting 422 is connected to the tee 424, and the other end is inserted into the oil return hole 30. One end of the third pipe fitting 423 is connected to the tee 424, and the other end is inserted into the oil return hole 30. The ends of the second pipe fitting 422 and the third pipe fitting 423 connected to the oil return hole 30 are both provided with a pier for limiting.

[0026] The float 41 is a hollow structure, and its material can be metal or non-metal. It has an oil return pipeline 410 inside, and the pipeline 410 is connected to the first pipe fitting 421 by welding or threading. The oil return assembly 4 further includes a filter screen 43. The filter screen 43 is wrapped around the outer surface of the float 41 and fixedly connected to the first pipe fitting 421. The fixing method can be welding. The filter screen 43 is used to filter the oil entering the float 41.

[0027] The oil return assembly 4 further includes a fixing bracket 44. The fixing bracket 44 is fixed on the air outlet pipe 3 and is located above the oil return assembly 4, which is used to limit the rotation range of the oil return assembly 4 and increase the strength of the air return pipe 3.

[0028] The upper end of the cylinder body 1 is provided with an upper end cover 5, and the lower end is provided with a lower end cover 6. The intake pipe 2 is fixed to the upper end cover 5 through a steel sleeve 7, and the outlet pipe 3 is also fixed to the upper end cover 5 through the steel sleeve 7. It further includes a base 8. The lower end cover 6 is located above the base 8, and the lower end cover 6 is welded to the base 8.

[0029] In the oil return assembly 4 of this embodiment, the float 41 can always float on the oil. The oil enters the float and then returns through the oil return pipe 42 and the oil return hole 30. The oil return pipe 42 can rotate within the oil return hole 30. When there is more oil, the position of the float 41 in the cylinder body 1 rises, and when there is less oil, the position of the float 41 in the cylinder body 1 drops, without affecting the oil return effect.

[0030] Embodiment 2

[0031] Refer to Figure 5 This embodiment is different from Embodiment 1 only in the structure of the oil return pipe. The oil return pipe 42 of this embodiment includes a first pipe fitting 421 and a second pipe fitting 422. The second pipe fitting 422 is connected to one end of the first pipe fitting 421 by opening a hole at the central position along the length direction, and the other end of the first pipe fitting 421 is connected to the float 41.

[0032] Embodiment 3

[0033] Refer to Figure 6 This embodiment is different from Embodiment 1 and Embodiment 2 in that: the oil return assembly 4 further includes a first U-shaped pipe 431 and a second U-shaped pipe 432, and the first U-shaped pipe 431 and the second U-shaped pipe 432 are respectively connected to the two ports of the oil return pipe 42. The structure of the oil return pipe 42 of this embodiment can adopt that of Embodiment 1 or Embodiment 2. After adding the first U-shaped pipe 431 and the second U-shaped pipe 432, only two coaxial oil return holes 30 need to be opened on one of the pipelines of the return air pipe 3. The oil return assemblies of this embodiment and those of Embodiment 1 and 2 can be provided in one group or multiple groups.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid separator that dynamically and automatically changes the oil return position, comprising a cylinder, an air inlet pipe, and an air outlet pipe, wherein one end of the air inlet pipe is inserted into the cylinder and fixedly connected to the cylinder, and one end of the air outlet pipe is inserted into the cylinder and fixedly connected to the cylinder, characterized in that: It comprises an oil return assembly, which comprises a float and an oil return pipe. The float is connected with the oil return pipe. A coaxial oil return hole is opened on the air outlet pipe. The oil return pipe is inserted into the oil return hole and rotates around the axis of the oil return hole.

2. The gas-liquid separator with dynamic and automatic oil return position change according to claim 1 is characterized in that: The oil return pipe is T-shaped.

3. The gas-liquid separator with dynamic and automatic oil return position change according to claim 2 is characterized in that: The oil return pipe includes a first pipe fitting, a second pipe fitting, a third pipe fitting, and a tee. One end of the first pipe fitting is inserted into the float and connected to the float, and the other end is connected to the tee. One end of the second pipe fitting is connected to the tee, and the other end is inserted into the oil return hole. One end of the third pipe fitting is connected to the tee, and the other end is inserted into the oil return hole.

4. The gas-liquid separator with dynamic and automatic oil return position change according to claim 2 is characterized in that: The oil return pipe comprises a first pipe member and a second pipe member. The second pipe member has a hole at the center along the length direction and is connected to one end of the first pipe member. The other end of the first pipe member is connected to a float.

5. The gas-liquid separator with dynamic and automatic oil return position change according to claim 2 is characterized in that: The oil return assembly further includes a first U-shaped tube and a second U-shaped tube, wherein the first U-shaped tube and the second U-shaped tube are respectively connected to two ports of the oil return pipe.

6. The gas-liquid separator with dynamic and automatic oil return position change according to claim 1 is characterized in that: The oil return assembly also includes a filter screen, and the filter screen is fixed on the outer surface of the float.

7. The gas-liquid separator with dynamic and automatic oil return position change according to claim 1 is characterized in that: The oil return assembly also includes a fixed bracket, which is fixed on the air outlet pipe and is located above the oil return assembly.

8. The gas-liquid separator with dynamic and automatic oil return position change according to claim 1 is characterized in that: The upper end of the cylinder body is provided with an upper end cover, and the lower end is provided with a lower end cover. The air inlet pipe is fixed to the upper end cover through a steel sleeve, and the air outlet pipe is also fixed to the upper end cover through a steel sleeve.

9. The gas-liquid separator with dynamic and automatic oil return position change according to claim 8 is characterized in that: It also includes a base, and the lower end cover is located on the base.

10. The gas-liquid separator with dynamic and automatic oil return position change according to any one of claims 1 to 6, characterized in that: The float is a hollow structure with an oil return pipeline inside.

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