Self-discharging type multi-oil-return-hole gas-liquid separator

Abstract

The utility model relates to the technical field of valve application, in particular to a self-discharging type multi-oil-return-hole gas-liquid separator which comprises a barrel, an inlet pipe is arranged outside the barrel and connected with the barrel in the tangential direction of the barrel, an outlet pipe is arranged in the barrel, and a plurality of oil outlet holes are formed in the outlet pipe. Due to the fact that oil return becomes good when the oil return hole is large, but backflow of liquid refrigerants becomes much, the oil is diluted, a vortex part is abraded abnormally, the compressor possibly breaks down, the returned liquid refrigerants are reduced when the oil return hole is small, oil supply in the compressor is insufficient due to the fact that the returned oil is also reduced, and the oil return of the vortex part is not sufficient. And abnormal abrasion can occur, so that the compressor breaks down. In order to ensure good oil return and avoid the phenomenon that the liquid refrigerant dilutes oil, the plurality of oil outlet holes are formed in the outlet pipe, so that oil return can be realized regardless of the height of the liquid level in the separator, and meanwhile, the arrangement of the small hole diameter can also reduce the entering of the liquid refrigerant.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separation, in particular to a self-draining gas-liquid separator with multiple oil return holes. Background Art

[0002] The gas-liquid separator adopts the principle of sedimentation separation and screen filtration to achieve liquid removal. It is mainly composed of a cylinder, a sedimentation device, a high-efficiency foam breaking net, a drain valve and other main components. It is generally installed in front of the compressor to achieve coarse filtration to remove liquid refrigerant and part of the water in the air to reduce the workload of the compressor.

[0003] The oil outlet holes of existing gas-liquid separators are mostly at the bottom of the outlet pipe and have a large hole diameter. The amount of returned oil and the amount of returned liquid refrigerant during the operation of the equipment cannot be effectively controlled, which can easily lead to compressor abnormalities. Utility Model Content

[0004] The utility model aims to provide a self-draining gas-liquid separator with multiple oil return holes to solve the technical problems in the prior art.

[0005] The utility model discloses a self-draining multi-oil return hole gas-liquid separator, comprising a cylinder, an inlet pipe is arranged outside the cylinder, the inlet pipe is connected with the cylinder along the tangent direction of the cylinder, an outlet pipe is arranged inside the cylinder, and a plurality of oil outlet holes are arranged on the outlet pipe.

[0006] Working principle: An oil outlet hole is set on the outlet pipe, and the liquid refrigerant containing oil is brought out through the gas in the outlet pipe and returned to the compressor. Since the oil return hole is larger, the oil return will be better, but the reflux of liquid refrigerant will also increase, which will cause the oil to be diluted (the lubricating effect of the oil is reduced), the vortex part will be abnormally worn, and the compressor may malfunction. If the oil return hole is small, the liquid refrigerant returning will be reduced, but because the oil return is also reduced, the oil supply in the machine will be insufficient. Due to the insufficient oil supply of the vortex part, abnormal wear will occur, causing the compressor to malfunction. In order to ensure good oil return and prevent the phenomenon of liquid refrigerant diluting the oil, multiple oil outlet holes are set on the outlet pipe to ensure that oil return can be achieved regardless of the liquid level in the separator. At the same time, the small aperture setting can also reduce the entry of liquid refrigerant.

[0007] Furthermore, the inlet pipe is spirally arranged along the side wall in the cylinder.

[0008] The inlet pipe is set by spiraling the wall. After the gas-liquid mixture enters the cylinder from the inlet pipe, the pressure decreases and the flow rate decreases because the airflow enters the large space of the cylinder from the inlet pipe with a small aperture. Since the airflow rate suddenly decreases, the strands of liquid or large droplets are separated by gravity and directly settle in the liquid accumulation section. At the same time, the inlet pipe is designed to be close to the shell, and the tangential inlet method is adopted. The gas moves in a cyclone shape in the shell. The droplets are thrown on the wall of the container due to their heavy weight and subjected to large centrifugal force, and finally separated from the gas.

[0009] Furthermore, the outlet pipe is a U-shaped pipe.

[0010] By setting the outlet pipe to a U-shaped pipe, the inlet of the U-shaped pipe is located at a high position, which can prevent the separated liquid deposited at the bottom from entering the outlet pipe, resulting in reduced separation effect. At the same time, the U-shaped design can extend the pipe length, so that the incompletely settled liquid that may exist in the separated gas can also settle and discharge during the process of leaving the separator, thereby improving the separation effect.

[0011] Furthermore, there are four oil outlet holes.

[0012] By setting the four oil outlet holes, it can be effectively ensured that oil return can be achieved at different liquid levels in the separator. The small-aperture oil outlet holes can also reduce the amount of liquid refrigerant entering the oil phase while ensuring oil return, resulting in oil dilution.

[0013] Furthermore, the four oil outlet holes are respectively located at the bottom of the U-shaped tube, at 1 / 4, 1 / 2 and 3 / 4 of the height of the outlet and inlet pipes.

[0014] Under this oil outlet hole distribution, within a certain vertical rising flow rate of the elbow pipe, the return amount of the compressor's refrigeration oil and liquid refrigerant is effectively controlled, which not only ensures the amount of oil in the compressor, but also suppresses the reflux of liquid refrigerant to achieve oil dilution. The flow rate in the outlet pipe is generally 7.5-12m / s, and in this flow rate range, the oil outlet hole distribution is set, and the experiment shows that the oil output is considerable, but the return of liquid refrigerant is small.

[0015] Furthermore, the diameter of the oil outlet hole is 0.26 mm.

[0016] Furthermore, the air outlet section of the outlet pipe is provided with a pressure equalizing hole.

[0017] By setting the pressure equalizing hole, it is ensured that when the gas-liquid separator stops the compressor in a state where the liquid-liquid refrigerant level is fixed, the liquid-liquid refrigerant will not flow into the compressor.

[0018] Furthermore, a filter screen is arranged on the upper portion of the pressure equalizing hole.

[0019] By setting up a filter, impurities can be filtered out to prevent them from entering the compressor and causing malfunctions.

[0020] Furthermore, the pore size of the filter is 0.6 mm.

[0021] By setting the filter mesh aperture, impurities can be effectively filtered out while ensuring that the return oil will not be blocked.

[0022] Furthermore, a valve is provided at the bottom of the cylinder.

[0023] Furthermore, a liquid level gauge is provided on the cylinder.

[0024] Furthermore, the valve is interlocked with the liquid level meter.

[0025] When the liquid level is greater than 50%, excess refrigerant can be automatically discharged.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] 1. By setting multiple oil outlet holes on the outlet pipe, oil return can be achieved regardless of the liquid level in the separator. At the same time, the small aperture setting can also reduce the entry of liquid refrigerant;

[0028] 2. The inlet pipe is set by spiraling the wall. After the gas-liquid mixture enters the cylinder from the inlet pipe, the pressure decreases and the flow rate decreases because the airflow enters the large space of the cylinder from the inlet pipe with a small aperture. Since the airflow rate suddenly decreases, the strands of liquid or large droplets are separated by gravity and directly settle in the liquid accumulation section. At the same time, the inlet pipe is designed to be close to the shell, and the tangential inlet method is adopted. The gas moves in a cyclone shape in the shell. The droplets are thrown onto the container wall due to their heavier weight and are subjected to greater centrifugal force, and are finally separated from the gas;

[0029] 3. By setting the four oil outlet holes, it can be effectively ensured that oil can be returned at different liquid levels in the separator. The small-diameter oil outlet holes can also reduce the amount of liquid refrigerant entering the oil phase while ensuring oil return, resulting in oil dilution;

[0030] 4. By setting the pressure equalizing hole, it is ensured that when the gas-liquid separator stops the compressor when the liquid refrigerant level is fixed, the liquid refrigerant will not flow into the compressor;

[0031] 5. By setting up a filter, it can filter out impurities and prevent impurities from entering the compressor and causing malfunctions;

[0032] 6. By setting the filter mesh aperture, impurities can be effectively filtered out while ensuring that the return oil will not be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a schematic diagram of the structure of the gas-liquid separator of the utility model.

[0035] In the above drawings, the meanings of the various marks are: 1-cylinder, 2-inlet pipe, 3-outlet pipe, 4-oil outlet hole, 5-pressure equalizing hole, 6-filter screen, 7-valve, 8-liquid level meter. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0037] Example 1

[0038] The technical solutions adopted in this embodiment are as follows:

[0039] like Figure 1 As shown, a self-draining multi-oil return hole gas-liquid separator comprises a cylinder 1, an inlet pipe 2 is arranged outside the cylinder 1, the inlet pipe 2 is connected to the cylinder 1 along the tangent direction of the cylinder 1, an outlet pipe 3 is arranged inside the cylinder 1, and a plurality of oil outlet holes 4 are arranged on the outlet pipe 3.

[0040] Working principle: An oil outlet hole 4 is provided on the outlet pipe 3, and the liquid refrigerant containing oil is brought out through the gas in the outlet pipe 3 and returned to the compressor. Since the oil return hole is larger, the oil return will be better, but the reflux of liquid refrigerant will also increase, resulting in oil dilution (reducing the lubricating effect of the oil), abnormal wear of the vortex part, and the compressor may malfunction. If the oil return hole is smaller, the amount of liquid refrigerant returning will be reduced, but because the oil return is also reduced, the oil supply in the machine will be insufficient. Due to the insufficient oil supply of the vortex part, abnormal wear will occur, causing the compressor to malfunction. In order to ensure good oil return and prevent the phenomenon of liquid refrigerant diluting the oil, multiple oil outlet holes 4 are provided on the outlet pipe 3 to ensure that oil return can be achieved regardless of the liquid level in the separator. At the same time, the setting of a small aperture can also reduce the entry of liquid refrigerant.

[0041] Example 2

[0042] In this embodiment, as a preferred embodiment of the present utility model, the specific structure is as follows Figure 1 As shown, based on the embodiment 1, the following improvement is disclosed: the inlet pipe 2 is spirally arranged along the side wall in the cylinder 1.

[0043] The inlet pipe 2 is arranged by spiraling the wall. After the gas-liquid mixture enters the cylinder 1 from the inlet pipe 2, the pressure decreases and the flow rate decreases because the airflow enters the large space of the cylinder 1 from the inlet pipe 2 with a small aperture. Since the airflow rate suddenly decreases, the strands of liquid or large droplets are separated by gravity and directly settle in the liquid accumulation section. At the same time, the inlet pipe 2 is designed to be close to the shell, and a tangential inlet method is adopted. The gas moves in a cyclone shape in the shell. The droplets are thrown on the container wall due to the large centrifugal force due to their heavy weight, and are finally separated from the gas.

[0044] Example 3

[0045] In this embodiment, as a preferred embodiment of the present utility model, the specific structure is as follows Figure 1 As shown, it discloses the following improvements based on implementation mode 2, the outlet pipe 3 is a U-shaped pipe, the oil outlet holes 4 are four, the four oil outlet holes 4 are respectively located at the bottom of the U-shaped pipe, at 1 / 4, 1 / 2 and 3 / 4 of the height of the air inlet pipe of the outlet pipe 3, and the oil outlet hole 4 has a diameter of 0.26 mm.

[0046] By setting the outlet pipe 3 as a U-shaped pipe, the inlet of the U-shaped pipe is located at a high position, which can prevent the separated liquid deposited at the bottom from entering the outlet pipe, resulting in a decrease in the separation effect. At the same time, the U-shaped design can extend the pipe length, so that the incompletely settled liquid that may exist in the separated gas can also settle and discharge in the process of leaving the separator, thereby improving the separation effect.

[0047] By providing the four oil outlet holes 4, it can be effectively ensured that oil return can be achieved at different liquid levels in the separator. The small-aperture oil outlet holes 4 can also reduce the amount of liquid refrigerant entering the oil phase, causing oil dilution, while ensuring oil return.

[0048] Under the distribution of the oil outlet holes 4, within a certain vertical rising flow rate of the elbow, the return amount of the refrigeration oil and liquid refrigerant of the compressor is effectively controlled, which not only ensures the oil amount in the compressor, but also suppresses the reflux of the liquid refrigerant to achieve oil dilution. The flow rate in the outlet pipe 3 is generally 7.5-12m / s, and in this flow rate range, the distribution of the oil outlet holes 4 is set, and the experiment shows that the oil output is considerable, but the returned liquid refrigerant is small.

[0049] Example 4

[0050] In this embodiment, as a preferred embodiment of the present utility model, Figure 1As shown, based on the implementation mode 3, the following improvements are disclosed: the outlet section of the outlet pipe 3 is provided with a pressure equalizing hole 5, the upper part of the pressure equalizing hole 5 is provided with a filter screen 6, the bottom of the cylinder 1 is provided with a valve 7, the cylinder 1 is provided with a liquid level gauge 8, and the valve 7 is interlocked with the liquid level gauge 8.

[0051] By providing the pressure equalizing hole 5, it is ensured that when the gas-liquid separator stops the compressor when the liquid-liquid refrigerant level is fixed, the liquid-liquid refrigerant will not flow into the compressor. The pore size of the filter screen 6 is 0.6 mm.

[0052] By providing the filter 6, impurities can be filtered out to prevent the impurities from entering the compressor and causing malfunctions.

[0053] By setting the filter screen to 6 apertures, impurities can be effectively filtered out while ensuring that the return oil will not be blocked.

[0054] When the liquid level is greater than 50%, excess refrigerant can be automatically discharged.

[0055] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various forms of implementation methods under the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the scope of protection of this embodiment. The scope of protection of this embodiment shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A self-draining multi-oil return hole gas-liquid separator, characterized in that: The invention comprises a cylinder (1), an inlet pipe (2) is arranged outside the cylinder (1), the inlet pipe (2) is connected to the cylinder (1) along the tangent direction of the cylinder (1), an outlet pipe (3) is arranged inside the cylinder (1), a plurality of oil outlet holes (4) are arranged on the outlet pipe (3), the outlet pipe (3) is a U-shaped pipe, the number of the oil outlet holes (4) is 4, and the 4 oil outlet holes (4) are respectively located at the bottom of the U-shaped pipe, and at 1 / 4, 1 / 2 and 3 / 4 of the height of the air inlet pipe of the outlet pipe (3).

2. The self-draining multi-oil return hole gas-liquid separator according to claim 1, characterized in that: The inlet pipe (2) is spirally arranged along the side wall in the cylinder (1).

3. The self-draining multi-oil return hole gas-liquid separator according to claim 1, characterized in that: The diameter of the oil outlet hole (4) is 0.26 mm.

4. The self-draining multi-oil return hole gas-liquid separator according to claim 1, characterized in that The gas outlet section of the outlet pipe (3) is provided with a pressure equalizing hole (5).

5. The self-draining multi-oil return hole gas-liquid separator according to claim 4, characterized in that: A filter screen (6) is arranged on the upper part of the pressure equalizing hole (5).

6. The self-draining multi-oil return hole gas-liquid separator according to claim 1, characterized in that: A valve (7) is provided at the bottom of the cylinder (1).

7. The self-draining multi-oil return hole gas-liquid separator according to claim 1, characterized in that: The cylinder (1) is provided with a liquid level meter (8).

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