Oil and gas separation device and condenser

Abstract

The application discloses an oil-gas separation device, which comprises an air inlet pipe and is characterized in that the oil-gas separation device further comprises an oil filter structure arranged in the air inlet pipe; the oil filter structure is one or more of a porous plate, a rotary separator and a filter screen; the through holes in the porous plate are gradually reduced in size in the fluid flow direction; and an oil return port is arranged on the side of the porous plate. The oil filter structure further comprises the filter screen and the rotary separator. The application further discloses a condenser provided with the oil-gas separation device. The oil-gas separation device solves the problem of low oil-gas separation efficiency.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to an oil-gas separation device and a condenser. Background Technology

[0002] Screw refrigeration compressors require the separation of refrigerant and oil mixtures during operation. In existing technologies, the solution is to use built-in or external oil-gas separators. If a built-in oil-gas separator is used, higher oil-gas separation efficiency means increasing the size of the oil-gas separator and increasing the external dimensions of the condenser of the air-cooled unit. This requires more installation and operating space, and also increases the amount of refrigeration oil to be charged and the difficulty of equipment manufacturing.

[0003] Three Chinese invention patents with application announcement numbers CN103388941A, CN106642848A, and CN102242993A disclose an oil-gas separator. The oil-gas separator includes an air inlet pipe, a separator, and a filter plate. The filter plate is installed in the separator, and the refrigerant is separated into oil and gas only in the separator. This results in a large volume of filter plates in the oil-gas separator and fails to make full use of the space in the air inlet pipe, so the oil-gas separation efficiency is still not high. Summary of the Invention

[0004] To address the issue of low separation efficiency in built-in oil-gas separators, this invention proposes an oil-gas separation device.

[0005] The technical solution adopted in this invention is to propose an oil-gas separation device, which also includes an oil filter structure disposed in the air inlet pipe.

[0006] Preferably, the oil filter structure is a porous plate.

[0007] Preferably, the edge of the perforated plate is further provided with an oil return port that allows oil droplets to pass through the perforated plate.

[0008] Preferably, the diameter of the through holes on the porous plate decreases from large to small in the direction of fluid flow.

[0009] Preferably, the porous plate is recessed from the edge to the center, and the recess of the porous plate is conical;

[0010] Alternatively, the recess in the porous plate may be arc-shaped.

[0011] Preferably, the cross-section of the porous plate is corrugated.

[0012] Preferably, at least one of the perforated plates is inclined to the central axis of the air intake pipe.

[0013] Preferably, the oil filter structure is a spiral-shaped separator.

[0014] Preferably, the oil filtration structure is a filter screen.

[0015] The present invention also proposes a condenser comprising the above-described oil-gas separation device.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The porous plate included in this invention is installed at the air inlet pipe, which reduces the volume of the filter plate and improves the oil filtration efficiency.

[0018] 2. The present invention has an oil return port on the periphery of the porous plate, which can serve as an oil droplet return channel to further improve the separation efficiency;

[0019] 3. The present invention is equipped with a vortex separator and a filter screen. The vortex separator can fully mix oil and gas, and the filter screen can perform precise separation. The above configuration can improve the oil and gas separation efficiency. Attached Figure Description

[0020] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of an oil-gas separation device;

[0022] Figure 2 This is a schematic diagram of a conical perforated plate;

[0023] Figure 3 This is a schematic diagram of a corrugated perforated plate;

[0024] Figure 4 These are cross-sectional views of wavy, arc-shaped, and wavy perforated plates;

[0025] Figure 5 This is a front view of the spin divider;

[0026] Figure 6 This is a front view of a rotary distributor with a through hole;

[0027] Figure 7 This is a cross-sectional view of the oil-gas separation unit and condenser.

[0028] 1. Intake pipe; 2. Separator chamber; 3. Perforated plate; 31. Oil return port; 4. Filter screen; 5. Rotary separator. Detailed Implementation

[0029] See Figure 7 The refrigerant vapor and oil mixture discharged from the screw refrigeration compressor now needs to retain the oil in the condenser while discharging the refrigerant vapor. See also Figure 1This invention proposes an oil-gas separation device and a condenser. The oil-gas separation device includes an inlet pipe and a perforated plate disposed within the inlet pipe. The principle of the oil-gas separation device is as follows: oil, which is a small droplet, condenses into a larger droplet upon contact with an object surface and drips back into the condenser, while refrigerant vapor, being a gas, can pass through the separation chamber 2 from top to bottom, thus achieving oil-gas separation.

[0030] Specifically, the intake pipe 1 is cylindrical, and a condenser is fixedly connected to its lower end. The cavity inside the intake pipe 1 is a separation chamber 2, within which a perforated plate 3, a vortex separator 5, and a filter screen 4 are fixedly installed. The perforated plate 3 is circular, and its surface has recesses. These recesses increase the surface area of ​​the perforated plate 3, allowing for a larger contact area when oil droplets come into contact with it, thus resulting in more oil droplets condensing. See also... Figure 2 , 3 4. The recess can be conical (V-shaped), arc-shaped, wavy, or a flat plate without increasing the surface area. The conical or arc-shaped perforated plate 3 can also have a wavy structure. The perforated plate 3 has multiple through-holes for the oil-gas mixture to pass through, with a diameter of 5-10 mm, the specific size depending on the physical properties of the lubricating oil. The through-holes can be round, square, or oblong, with the diameter gradually decreasing along the fluid flow direction. The fluid flowing from the larger diameter to the smaller diameter allows oil droplets to converge and drip. A gear-shaped oil return port 31 is also provided on the periphery where the perforated plate 3 connects to the intake pipe 1. The oil return port 31 allows oil droplets to drip through under gravity. The perforated plate 3 is inclined relative to the central axis at an angle of less than 10 degrees. This inclined setting allows oil droplets to drip under gravity.

[0031] See Figure 5 The vortex separator 5 has a spiral structure, which causes the fluid to rotate along it, using the principle of centrifugal separation to remove denser oil droplets. (See also...) Figure 6 Through holes can also be made on the cyclone separator 5 to improve separation efficiency.

[0032] The filter screen 4 is cylindrical and is a commonly used mesh filtration structure device. The filter screen 4 can precisely separate oil-gas mixtures. The perforated plate 3, the vortex separator 5, and the filter screen 4 are all installed in the separation chamber 2. The number, orientation, and installation order of the perforated plate 3, the vortex separator 5, and the filter screen 4 can also be determined according to actual needs.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A condenser, characterized in that, The condenser includes an oil-gas separation device, which includes an inlet pipe and an oil filter structure disposed within the inlet pipe. The lower end of the inlet pipe is fixedly connected to the condenser. The cavity inside the inlet pipe is a separation chamber. The oil filter structure consists of a perforated plate, a vortex separator, and a filter screen fixedly disposed within the separation chamber. The diameter of the through holes on the perforated plate decreases from large to small in the direction of fluid flow. The vortex separator has a spiral structure and is covered with through holes.

2. The condenser according to claim 1, characterized in that, The edge of the perforated plate is also provided with an oil return port that allows oil droplets to pass through the perforated plate.

3. The condenser according to claim 1, characterized in that, The porous plate is concave from the edge to the center, and the concavity of the porous plate is conical; Alternatively, the recess in the porous plate may be arc-shaped.

4. The condenser according to claim 1, characterized in that, The cross-section of the porous plate is corrugated.

5. The condenser according to claim 1, characterized in that, At least one of the perforated plates is inclined to the central axis of the intake pipe.

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