CN206362033U - Oil separator and air conditioning unit - Google Patents

Abstract

The utility model discloses an oil separator and air conditioning unit belongs to air conditioner technical field, for solving the poor problem design of current device oil separating effect. The oil separator comprises a shell with an inner cavity, wherein the shell is provided with an air inlet, an air outlet and an oil return port, the shell is internally provided with a spiral guide plate, a hollow first filter screen component sleeved in the spiral guide plate and a second filter screen component for plugging an opening at the upper end of the first filter screen component; the mixed gas with oil entering from the air inlet is subjected to primary filtration by the spiral guide plate and then is subjected to secondary filtration by the first filter screen assembly, then passes through the second filter screen assembly along the axial direction to be subjected to tertiary filtration and then is discharged from the air outlet, and oil drops obtained by filtration flow out from the oil return port. The utility model discloses oil separator has tertiary separation structure, can separate lubricating oil from refrigerant gas effectively, has avoided taking liquid, the low scheduling problem of refrigeration effect because of breathing in that the oil leakage leads to, has improved the air conditioning unit reliability.

Description

A kind of oil separator and air conditioning unit

technical field

The utility model relates to the technical field of air conditioning, in particular to an oil separator and an air conditioning unit.

Background technique

When the centrifugal compressor is working, the mechanical movement (such as oil pump stirring, rotor movement, gear meshing movement, etc.) and the high-pressure gas of the air seal continuously increase the internal gas pressure of the compressor. It is necessary to connect the inside and outside of the compressor through connecting pipes and other structures to balance internal air pressure. However, when the internal refrigerant gas passes through the connecting pipe, it will carry the gaseous lubricating oil. If it is not separated, the lubricating oil will flow to the outside of the compressor, that is, the phenomenon of "running oil". On the one hand, the phenomenon of "running oil" causes the unit to inhale liquid, which damages the life of the impeller; on the other hand, it reduces the level of lubricating oil, so that the bearings and other parts cannot be fully lubricated and aggravated wear. Therefore, an oil separation part is often added before the connecting pipe to isolate the gaseous lubricating oil.

Oil separators can be divided into built-in oil separators and external oil separators. The separation methods can be divided into reduced-speed collision separation, centrifugal separation and filtration separation, etc., and reduced-speed collision separation and centrifugal separation are often used as the first stage Separation method, filtration separation is often used as a secondary separation method. As shown in Figure 1, the two-stage oil separator commonly used in existing centrifugal compressors, when working, the mixed gas carrying lubricating oil enters the oil separator from the air inlet 11, and after colliding with the baffle 7, the kinetic energy decreases, and part of the lubricating oil The mixed gas after deceleration enters the filter screen assembly 8, and the oil droplets gather and become larger under the action of the filter screen assembly 8, and descend under the action of gravity, while the gas continues to rise. The secondary separation is completed and finally discharged from the gas outlet 12.

However, the above-mentioned oil separator has the following disadvantages: when the amount of mixed gas is large and the flow velocity is small, the collision separation effect of the two baffles 7 is reduced. In the future, before it can gather in time, it will be dispersed by the gas behind, and finally the lubricating oil will flow to the outside of the compressor with the gas, and the phenomenon of "running oil" will appear.

Utility model content

In view of the above problems, one purpose of this utility model is to propose an oil separator with good lubricating oil separation effect;

Another purpose of the utility model is to provide an air conditioning unit with good stability.

For this purpose, the utility model adopts the following technical solutions on the one hand:

An oil separator, comprising a housing with an inner cavity, the housing is provided with an air inlet, an air outlet and an oil return port, a spiral deflector is provided in the housing, and the spiral guide The hollow first filter screen assembly in the flow plate and the second filter screen assembly that blocks the upper end opening of the first filter screen assembly; the mixed gas with oil entering from the air inlet passes through the spiral deflector After the first-stage filtration, it is filtered by the first filter screen assembly for the second stage, and then passes through the second filter screen assembly in the axial direction for three-stage filtration and then is discharged from the air outlet. out of the mouth.

Further, the second filter screen assembly is placed inside the upper end of the first filter screen assembly; or, the second filter screen assembly is adjacently arranged above the first filter screen assembly.

Further, the second screen assembly is plate-shaped.

Further, support rings are provided on the inside and outside of the first filter screen assembly respectively, through holes are respectively provided on the two support rings, and both ends of the two support rings are fixedly connected to the housing respectively.

Further, there is a gap with a width of d1 between the spiral deflector and the support ring located outside the first screen assembly.

Further, the upper side and the lower side of the second filter screen assembly are respectively provided with a hollow annular support plate, and the outer periphery of the support plate is fixedly connected with the support ring located inside the first filter screen assembly.

Further, the oil return port is arranged at the center of the bottom plate of the casing; and/or, the oil return port is arranged on a part of the bottom plate of the casing below the first filter screen assembly.

Further, the helix angle of the spiral deflector is α, the pitch is H ₃ , the total height is H ₂ , and the height of the inner chamber of the housing is H ₁ ; wherein, 20°≦α≦60°, and/or Or H ₃ ≦H ₂ /5, and/or 0.85H ₁ ≦H ₂ ≦0.95H ₁ .

Further, the thickness of the first filter screen assembly is greater than or equal to 40mm; and/or, the thickness of the second filter screen assembly is greater than or equal to 40mm.

Further, the air outlet is arranged on the top plate of the housing, at least the bottom of the inner wall of the air outlet is a slope inclined outward, and the upper end of the slope is rounded.

On the other hand, the utility model adopts the following technical solutions:

An air conditioner unit includes a compressor and any one of the above oil separators, and the lubricating oil flowing out from the oil return port of the oil separator is supplied to the compressor.

The beneficial effects of the utility model are as follows:

The oil separator of the utility model has a three-stage separation structure, which can effectively separate the lubricating oil from the refrigerant gas, avoiding the problems of liquid inhalation and low cooling effect caused by oil leakage, and improving the reliability of the air conditioning unit.

Because the air conditioner unit of the utility model adopts the above-mentioned oil separator, the oil separator can guide the refrigerant gas to transition from the inside of the compressor to the outside, and at the same time guide the separated liquefied lubricating oil back to the oil tank, and the air conditioner unit has high reliability.

Description of drawings

Fig. 1 is the structural representation of prior art oil separator;

Fig. 2 is a schematic diagram of the three-dimensional structure of the oil separation structure provided by the first preferred embodiment of the present invention;

Fig. 3 is a cross-sectional view of the oil separation structure provided by the first preferred embodiment of the present invention;

Fig. 4 is a working principle diagram of the oil separation structure provided by the preferred embodiment 1 of the present invention.

In the picture:

1. Shell; 2. Spiral deflector; 3. First filter assembly; 4. Second filter assembly; 5. Support ring; 6. Support plate; 7. Baffle; 8. Filter assembly; 11 , air inlet; 12, air outlet; 13, oil return port.

detailed description

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

Preferred embodiment one:

This preferred embodiment provides an oil separator, which is mainly but not limited to be used in air-conditioning units. Please refer to Fig. 2 and Fig. 3, the oil separator of this preferred embodiment is a vertical oil separator, which includes a housing 1 with an inner cavity, and the housing 1 is provided with an air inlet 11, an air outlet 12 and an oil return port 13. The shell 1 is provided with a spiral deflector 2, a hollow first filter assembly 3 sleeved in the spiral deflector 2, and a second filter assembly 4 that blocks the upper opening of the first filter assembly 3; The mixed gas with oil entering from the air inlet 11 is filtered by the spiral deflector 2 for the first stage, then is filtered by the first filter screen assembly 3 for the second stage, and then passes through the second filter screen assembly 4 in the axial direction for the third stage of filtration It is discharged from the air outlet 12, and the filtered oil droplets flow out from the oil return port 13. The housing 1 is preferably but not limited to a cylindrical hollow structure, and the side wall of the housing 1 can be made of a sheet metal plate reel; the top plate of the housing 1 can be, but not limited to, a flange fixed to the side wall of the housing 1, To facilitate connection with external components; the bottom plate of the housing 1 can be, but not limited to, a solid plate.

The oil separator in this embodiment has a three-stage separation structure, which can effectively separate the lubricating oil from the refrigerant gas, avoiding problems such as suction liquid and low cooling effect caused by oil leakage, and improving the reliability of the unit.

The second filter screen assembly 4 blocks the opening of the first filter screen assembly 3 to filter the mixed gas in three stages. The second screen assembly 4 is preferably placed inside the upper end of the first screen assembly 3, so that the space occupied in the axial direction is smaller and the overall structure is more compact. It should be pointed out that the arrangement of the second screen assembly 4 is not limited to the above-mentioned situation, for example, the second screen assembly 4 may also be arranged adjacent to the top of the first screen assembly 3 .

The first filter screen assembly 3 and the second filter screen assembly 4 are formed by weaving metal wires crossing each other at a certain angle. The overall shape and structure of the second filter screen assembly 4 is not specifically limited, and the mixed gas filtered by the first filter screen assembly 3 can pass through the second filter screen assembly 4 in the axial direction for further filtration and separation. But preferably, the second screen assembly 4 is in the shape of a plate. The plate shape can be a flat plate, a folded plate, a corrugated plate or any other irregular plate shape. Considering factors such as ease of processing and low production cost, the plate-shaped filter screen is preferably in the shape of a flat plate; considering the factor of better filtering effect, the plate-shaped filter screen is preferably in the shape of a folded plate, a wave plate, or the like.

The number of filter screens in the first screen assembly 3 and the second screen assembly 4 is not limited, and can be set according to specific needs. When the first filter screen assembly 3 and the second filter screen assembly 4 include multiple filter screens, the thickness of the multiple filter screens can be the same or different, but the filtration efficiency is positively correlated with the filter screen thickness, considering the size of the structure and the filter effect comprehensively, The thickness of the first screen assembly 3 is greater than or equal to 40 mm, and/or the thickness of the second screen assembly 4 is greater than or equal to 40 mm.

The installation method of the first filter screen assembly 3 is not specifically limited, but preferably, the inner side and the outer side of the first filter screen assembly 3 are respectively provided with support rings 6, and the two support rings 6 are respectively provided with through holes for the passage of the mixed gas and The two ends of the two supporting rings 6 are fixedly connected with the housing 1 respectively, specifically, the upper ends of the two supporting rings 6 are respectively fixedly connected with the top cover of the housing 1, and the lower ends are respectively fixedly connected with the bottom plate of the housing 1, so as to fix the first Filter assembly 3. The connection between the support ring 6 and the housing 1 is preferably but not limited to welding.

The two support rings 6 are respectively provided with through holes for the mixed gas to pass through. The shapes, sizes and arrangements of the through holes on the two support rings 6 can be the same or different, so as to allow the mixed gas to pass through and improve the filtering effect. Preferably, circular through holes with a diameter of φD1 are evenly distributed on the two supporting rings 6 . More preferably, 2mm≦φD1≦5mm.

The installation method of the second filter screen assembly 4 is not specifically limited, but preferably, the upper side and the lower side of the second filter screen assembly 4 are respectively provided with a hollow annular support plate, and the outer periphery of the support plate is in contact with the first filter screen assembly 3. The inner support ring 6 is fixedly connected. Preferably, the support plate is connected to the support ring 6 inside the first screen assembly 3 by welding.

The spiral deflector 2 makes the gas spiral up forcibly, and performs primary filtration on the mixed gas. The helix angle of the spiral deflector 2 is α, the pitch is H ₃ , the overall height is H ₂ , and the height of the inner cavity of the shell 1 is H ₁ ; in order to make the gas have enough helical ascending stroke to ensure the first-stage separation and filtration effect , 20°≦α≦60°, and/or H ₃ ≦H ₂ /5, and/or 0.85H ₁ ≦H ₂ ≦0.95H ₁ .

The spiral deflector 2 is fixedly connected to the inner wall of the housing 1, and its connection with the housing 1 is not specifically limited, but preferably, the spiral deflector 2 is welded to the inner wall of the housing 1 to be fixed by the housing 1, support.

Furthermore, in order to allow the oil droplets to flow down smoothly during the first-stage filtration, there is a gap of width d1 between the spiral deflector 2 and the support ring 6 located outside the first filter screen assembly 3 . Preferably, 2mm≦d1≦5mm.

In order to facilitate the outflow of the liquid lubricating oil inside the oil separator, the oil return port 13 is arranged at the center of the bottom plate of the housing 1; and/or, the oil return port 13 is arranged on the part of the bottom plate of the housing 1 below the first filter screen assembly .

The gas outlet 12 is arranged on the top plate of the housing 1. In order to reduce the gas pressure drop of the gas outlet 12, at least the bottom of the inner wall surface of the oil return port 13 is a slope inclined to the outside, and the upper end of the slope is rounded.

The working principle of the oil separator of this embodiment will be introduced below in conjunction with Fig. 4: during operation, the mixed gas enters the spiral deflector 2 through the air inlet 11 and spirals up to perform primary separation, and part of the lubricating oil gas is separated from the mixed gas The oil droplets are separated and gathered into liquid oil droplets, and the oil droplets flow down along the upper surface of the blade of the spiral deflector 2 or the gap between the spiral deflector 2 and the support ring 6 under the action of gravity, and the first-level separation is completed so far;

The lubricating oil gas that has not been separated under the centrifugal force flows through the first filter screen assembly 3 for secondary separation. Separated, flow to the oil return port 13 under the action of gravity, so far the secondary separation is completed;

The remaining mixed gas carrying a small amount of lubricating oil flows to the second filter screen assembly 4 for three-stage separation. There are two paths for the mixed gas carrying a small amount of lubricating oil to enter the three-stage separation: first, radially from the first filter screen assembly 3 It flows into the second filter screen assembly 4, and secondly, enters the inner cavity of the housing 1 radially from the first filter screen assembly 3, and then flows axially to the second filter screen assembly 4; the mixed gas flows through the second filter screen assembly 4 if it cannot enter from any path. The second filter screen assembly 4 is the same as the secondary separation. Under the action of the metal wire of the second filter screen assembly 4, a small amount of lubricating oil is separated, and flows to the oil return port 13 under the action of gravity, and the separated lubricating oil The refrigerant gas then flows to the gas outlet 12, so far the three-stage separation is completed.

Preferred embodiment two:

This preferred embodiment provides an oil separator whose structure is basically the same as that of the preferred embodiment 1, the difference being that the oil separator of this preferred embodiment is a horizontal oil separator; the oil return port 13 of the oil separator Set on the side wall of the housing 1, the number and position of the oil return ports 13 can be set according to specific conditions.

In order to facilitate air intake, the air intake 11 in this preferred embodiment is preferably provided on the side wall of the casing 1 .

Embodiment three:

This preferred embodiment provides an air-conditioning unit, which includes a compressor and an oil separator as described in any one of the preferred embodiments 1 or 2, and the lubricating oil flowing out from the oil return port 13 of the oil separator is supplied to the compressor.

The air-conditioning unit provided in this embodiment adopts the above-mentioned oil separator, and the oil separator can guide the refrigerant gas to transition from the inside of the compressor to the outside, and at the same time guide the separated liquefied lubricating oil back to the oil tank, and the air-conditioning unit has high reliability.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (11)

1. An oil separator, comprising a housing (1) with an inner chamber, the housing (1) is provided with an air inlet (11), an air outlet (12) and an oil return port (13), its It is characterized in that a spiral deflector (2), a hollow first filter screen assembly (3) sleeved in the spiral deflector (2) and a plugging of the first filter element are arranged in the housing (1). A second filter screen assembly (4) with an open upper end of the filter screen assembly (3); The oily mixed gas entering from the air inlet (11) is filtered by the spiral deflector (2) for the first stage and then filtered by the first filter screen assembly (3) for the second stage, and then passes through the After passing through the second filter screen assembly (4) for three-stage filtration, it is discharged from the air outlet (12), and the filtered oil droplets flow out from the oil return port (13). 2. The oil separator according to claim 1, characterized in that, the second screen assembly (4) is placed inside the upper end of the first screen assembly (3); or, the second screen assembly The component (4) is adjacently arranged above the first filter screen component (3). 3. The oil separator according to claim 1, characterized in that, the second screen assembly (4) is plate-shaped. 4. The oil separator according to any one of claims 1 to 3, characterized in that, the inner side and the outer side of the first screen assembly (3) are respectively provided with support rings (5), and the two support rings ( 5) are respectively provided with through holes and the two ends of the two support rings (5) are fixedly connected with the housing (1) respectively. 5. The oil separator according to claim 4, characterized in that there is a gap between the spiral deflector (2) and the support ring (5) located outside the first screen assembly (3) A gap of width d1. 6. The oil separator according to claim 4, characterized in that, the upper side and the lower side of the second screen assembly (4) are respectively provided with a hollow annular support plate (6), and the support plate ( 6) is fixedly connected to the support ring (5) located inside the first screen assembly (3). 7. The oil separator according to any one of claims 1 to 3, characterized in that, the oil return port (13) is arranged at the center of the bottom plate of the housing (1); and/or, the oil return port The oil port (13) is arranged on the part of the bottom plate of the casing (1) located below the first filter screen assembly (3). 8. The oil separator according to any one of claims 1 to 3, characterized in that, the helix angle of the spiral deflector (2) is α, the pitch is H ₃ , and the total height is H ₂ , the The height of the inner cavity of the housing (1) is H ₁ ; 20°≦α≦60°, and/or H ₃ ≦H ₂ /5, and/or 0.85H ₁ ≦H ₂ ≦0.95H ₁ . 9. The oil separator according to any one of claims 1 to 3, characterized in that, the thickness of the first screen assembly (3) is greater than or equal to 40mm; and/or, the second screen assembly (4 ) with a thickness greater than or equal to 40mm. 10. The oil separator according to any one of claims 1 to 3, characterized in that, the air outlet (12) is arranged on the top plate of the housing (1), and the inside of the air outlet (12) At least the bottom of the wall surface is a slope inclined to the outside, and the upper end of the slope is rounded. 11. An air conditioning unit, characterized in that it comprises a compressor and an oil separator as claimed in any one of claims 1 to 10, and the lubricating oil flowing out from the oil return port (13) of the oil separator is supplied to the compressor.