Oil separator for refrigerating unit

Abstract

The utility model relates to the field of refrigerating units, and provides an oil separator for a refrigerating unit. Comprising a columnar shell, one side of the upper portion of the shell is connected with an air inlet pipe, the air inlet pipe is connected with an air inlet hole in the shell, the air inlet direction of the air inlet pipe is tangent to the inner cylindrical face of the shell, the center of a top plate of the shell is connected with an air return pipe, the air return pipe penetrates through the center of the top of the shell and extends downwards, and the lower end of the air return pipe is located below a connector of the air inlet pipe and the shell; a plurality of circles of baffle plates are installed on the inner wall of the shell, and an anti-vortex baffle is installed at the bottom in the shell. A plurality of circles of baffle plates are arranged in the shell, an anti-vortex baffle plate is arranged at the bottom of the shell, an oil baffle plate is arranged in the shell, and finally an oil filter screen is arranged in an air return pipe, so that lubricating oil discharged from the compressor can be effectively and fully separated through the combination of various measures, and the possibility that oil drops enter a refrigerating system is reduced; therefore, the heat exchange efficiency of the refrigerating unit is ensured.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration units, in particular to an oil separator for refrigeration units. Background Art

[0002] During the operation of the compressor, part of the lubricating oil inside it is compressed and exhausted into the heat exchange unit along with the refrigerant gas. If the oil cannot be separated, the lubricating oil will accumulate in the heat exchange channel and form an oil film, thereby affecting the heat exchange efficiency of the heat exchange system. Part of the lubricating oil will return to the compressor after circulating in the heat exchange system. The lubricating oil entering the compressor will occupy the compression displacement of the compressor, thereby reducing the compression efficiency of the compressor. Therefore, if the lubricating oil cannot be separated, the efficiency of the entire refrigeration unit will be reduced and the energy consumption of refrigeration will increase.

[0003] The existing oil separator mainly separates the oil in the refrigerant gas by means of a filter. After the filter is saturated with oil, oil droplets still enter the heat exchange system from the oil separator along with the refrigerant gas. In addition, since a certain level of lubricating oil is stored in the oil separator, after the refrigerant gas enters, the lubricating oil is easily driven to form a vortex as the inner wall of the oil separator moves downward. The vortex will stir the residue at the bottom and return the oil to the compressor. At the same time, oil droplets may splash, and the splashed oil droplets are easily entered into the return air pipe along with the refrigerant gas. Summary of the Invention

[0004] In order to solve the problem of incomplete separation of existing oil separators, the utility model provides an oil separator for a refrigeration unit with good separation effect.

[0005] In order to achieve the above objectives, the technical solution adopted by the utility model is:

[0006] An oil separator for a refrigeration unit includes a cylindrical shell, a bottom plate is installed at the bottom of the shell, a top plate is installed at the top of the shell, and the bottom plate and the top plate seal the shell; one side of the upper part of the shell is connected to an air inlet pipe, the center of the top plate of the shell is connected to an air return pipe, one side of the bottom of the shell is connected to an oil return pipe, the oil return pipe is connected to the compressor, the air inlet pipe is connected to the air inlet hole on the shell, the air inlet direction of the air inlet pipe is tangent to the inner cylindrical surface of the shell, the air return pipe passes through the center of the top of the shell and extends downward, and the air return pipe is connected to the compressor. The lower end of the tube is located below the connection between the air inlet pipe and the shell; multiple circles of baffles are installed on the inner wall of the shell, and the multiple circles of baffles are evenly spaced above and below, and the baffles of the same circle are evenly distributed circumferentially in the shell; an anti-vortex baffle is installed at the bottom of the shell, and the top of the anti-vortex baffle is above the oil level, the return oil pipe is located on one side of the anti-vortex baffle, and an oil baffle is provided directly above the anti-vortex baffle, and the oil baffle is located between the return air pipe and the anti-vortex baffle.

[0007] Furthermore, the anti-vortex baffle is a group of cross-shaped baffles, and both ends of each baffle are connected to the inner wall of the shell.

[0008] Furthermore, a pair of side edges of the oil baffle plate are connected to the inner wall of the shell, and a ventilation gap is left between the other pair of side edges of the oil baffle plate and the inner wall of the shell.

[0009] Furthermore, an oil filter is installed inside the return air pipe.

[0010] Furthermore, the oil return pipe extends toward the bottom of the housing, and the bottom end of the oil return pipe is located below the anti-vortex baffle.

[0011] Furthermore, the baffle is a bent plate, and both ends of the bent plate are welded to the inner wall of the shell.

[0012] Furthermore, a float sight glass is installed on the outside of the bottom of the shell, and both ends of the float sight glass are connected to the inner cavity of the shell through sight glass holes. The lower sight glass hole is located below the oil level in the shell, and the upper sight glass hole is located above the oil level.

[0013] Furthermore, a drain hole is provided at the center of the bottom plate of the shell, the drain hole is connected to the inner cavity of the shell, and a screw plug is installed in the drain hole.

[0014] After adopting the above technical solution, the beneficial effects of the utility model are:

[0015] By arranging multiple circles of baffles on the inside of the shell, the refrigerant gas rotates downward along the inner wall after entering the shell. During the rotation, the oil droplets are thrown out by centrifugal force and collide with the baffles, thereby leaving the oil droplets behind. The oil droplets will flow down to the bottom of the shell due to their own weight and be collected. At the same time, an anti-vortex baffle is installed at the bottom of the shell. The setting of the baffle can prevent the lubricating oil at the bottom from forming a vortex after the gas enters, thereby preventing splashing, etc.; by arranging an oil baffle in the shell, the oil droplets mixed in the refrigerant gas and the oil droplets brought out from the bottom of the shell are blocked and separated, and finally an oil filter is installed in the return air pipe. The small amount of oil droplets contained in the refrigerant gas is filtered through the oil filter. Through the combination of multiple measures, the lubricating oil discharged from the compressor can be effectively separated, and the possibility of oil droplets entering the refrigeration system can be reduced, thereby ensuring the heat exchange efficiency of the refrigeration unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] Figure 2 It is a top view of the utility model.

[0018] In the figure: housing 1, bottom plate 2, top plate 3, air inlet pipe 4, air return pipe 5, baffle 6, oil return pipe 7, anti-vortex baffle 8, oil baffle 9, oil filter 10, sight glass hole 11, screw plug 12. DETAILED DESCRIPTION

[0019] The following is a further description of the specific embodiments of the present invention with reference to the accompanying drawings:

[0020] like Figure 1-2 As shown, an oil separator for a refrigeration unit includes a vertical cylindrical shell 1, with a base plate 2 mounted at the bottom of the shell and a top plate 3 mounted at the top of the shell 1. The base plate 2 and the top plate 3 seal the shell 1 to form the main body of the oil separator. An air inlet pipe 4 is connected to one side of the upper portion of the shell 1 and is welded to the air inlet hole in the shell 1. The air inlet direction of the air inlet pipe 4 is tangential to the inner wall of the shell 1 and slightly downward. This ensures that the refrigerant gas forms a downward vortex along the inner wall of the shell upon entering the shell 1, thereby generating centrifugal force to eject and separate oil droplets contained in the refrigerant gas. A return pipe 5 is connected to the center of the top plate 3 of the shell 1. The return pipe 5 passes through the top plate 3 of the shell 1 and extends to the middle of the shell 1. The bottom end of the return pipe 5 is lower than the connection port of the air inlet pipe 4 to prevent the refrigerant gas from being discharged directly from the return pipe 5 after entering the shell 1.

[0021] Multiple circles of baffles 6 are mounted on the inner wall of the housing 1, located below the intake pipe 4. These circles are evenly spaced above and below the inner wall, and the baffles 6 within a circle are evenly distributed circumferentially along the inner wall. The baffles 6 are triangular, bent plates, welded to the inner wall of the housing at both ends. Upon entering the refrigerant, vortices form and continuously collide with the baffles 6. Oil droplets trapped within the refrigerant gas are trapped by the baffles 6 during these collisions and, due to their own weight, drip to the bottom of the housing for collection.

[0022] One side of the bottom of the shell 1 is connected to an oil return pipe 7, which extends to the bottom of the shell 1. Since the air pressure in the intake pipe 4 is relatively high and the oil return pipe 7 is connected to the low-pressure end of the compressor, under the action of the pressure difference, the lubricating oil in the shell returns from the oil return pipe 7 to the lubrication part of the compressor for continued lubrication. Since the refrigerant gas enters in the form of a vortex, in order to avoid the lubricating oil at the bottom forming a vortex, thereby turning up the waste residue at the bottom of the lubricating oil and forming oil droplets, an anti-vortex baffle 8 is installed at the bottom position of the shell 1. The anti-vortex baffle 8 is a group of baffles arranged in a cross shape, and the two ends of each baffle are welded to the inner wall of the shell. The oil return pipe 7 is located on one side of the anti-vortex baffle 8, and the bottom end of the oil return pipe 7 is located below the anti-vortex baffle 8.

[0023] An oil baffle 9 is installed between the anti-vortex baffle 8 and the return pipe 5. One pair of side edges of the oil baffle 9 are connected to the inner wall of the shell 1, and a ventilation gap is left between the other pair of side edges of the oil baffle 9 and the inner wall of the shell 1. As the refrigerant gas moves upward from the bottom, it inevitably carries a small amount of oil droplets. The oil baffle 9 blocks and separates these oil droplets. The separated refrigerant gas then flows upward through the gap between the oil baffle 9 and the shell 1 and enters the return pipe 5.

[0024] An oil filter 10 is installed in the return pipe 5. A small amount of incompletely separated oil droplets contained in the refrigerant gas are filtered and separated by the oil filter 10 and then discharged from the return pipe 5 into the heat exchange system for heat exchange.

[0025] In order to monitor the oil level in the shell, a float sight glass is installed on the outside of the bottom of the shell. The two ends of the float sight glass are connected to the inner cavity of the shell through the sight glass hole 11. The lower sight glass hole is located below the oil level in the shell, and the upper sight glass hole is located above the oil level.

[0026] A drain hole is provided at the center of the bottom plate 2 of the shell, which is connected to the inner cavity of the shell. A screw plug 12 is installed in the drain hole, and the drain hole is used to discharge the residue at the bottom of the oil separator.

Claims

1. An oil separator for a refrigeration unit, comprising a cylindrical shell, a bottom plate mounted on the bottom of the shell, a top plate mounted on the top of the shell, the bottom plate and the top plate sealing the shell; an air inlet pipe connected to one side of the upper portion of the shell, an air return pipe connected to the center of the top plate of the shell, an oil return pipe connected to one side of the bottom of the shell, the oil return pipe being connected to the compressor, characterized in that: The air intake pipe is connected to the air intake hole on the shell, and the air intake direction of the air intake pipe is tangent to the cylindrical surface inside the shell. The return air pipe passes through the center of the top of the shell and extends downward. The lower end of the return air pipe is located below the connection port between the air intake pipe and the shell; multiple circles of baffles are installed on the inner wall of the shell, and the multiple circles of baffles are distributed at equal intervals above and below, and the baffles of the same circle are evenly distributed circumferentially in the shell; an anti-vortex baffle is installed at the bottom of the shell, and the top of the anti-vortex baffle is above the oil level. The return oil pipe is located on one side of the anti-vortex baffle, and an oil baffle is provided directly above the anti-vortex baffle, and the oil baffle is located between the return air pipe and the anti-vortex baffle.

2. The oil separator for a refrigeration unit according to claim 1, characterized in that: The anti-vortex baffle is a group of cross-shaped baffles, and both ends of each baffle are connected to the inner wall of the shell.

3. The oil separator for a refrigeration unit according to claim 1, characterized in that: A pair of side edges of the oil baffle plate are connected to the inner wall of the shell, and a ventilation gap is left between the other pair of side edges of the oil baffle plate and the inner wall of the shell.

4. The oil separator for a refrigeration unit according to claim 1, characterized in that: An oil filter is installed inside the air return pipe.

5. The oil separator for a refrigeration unit according to claim 1, characterized in that: The oil return pipe extends toward the bottom of the shell, and the bottom end of the oil return pipe is located below the anti-vortex baffle.

6. The oil separator for a refrigeration unit according to claim 1, characterized in that: The baffle is a bent plate, and both ends of the bent plate are welded to the inner wall of the shell.

7. The oil separator for a refrigeration unit according to claim 1, characterized in that: A float sight glass is installed on the outside of the bottom of the shell. Both ends of the float sight glass are connected to the inner cavity of the shell through sight glass holes. The lower sight glass hole is located below the oil level in the shell, and the upper sight glass hole is located above the oil level.

8. The oil separator for a refrigeration unit according to claim 1, characterized in that: A drain hole is provided at the center of the bottom plate of the shell, the drain hole is communicated with the inner cavity of the shell, and a screw plug is installed in the drain hole.

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