CN114608227A - Oil separator and air condensing units - Google Patents

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to an oil separator and an air conditioner outdoor unit. According to the oil separator provided by the embodiment of the invention, the flow direction of the mixture is changed, the mixture has a tangential speed, the mixture can rotate in the tank body, the oil-gas separation is further realized through centrifugal force, the tangential speed is provided for the mixture, the mixture is prevented from directly colliding with the tank body, the kinetic energy loss is reduced, the separation speed is accelerated, and the separation effect is improved.

Description

Oil separator and air condensing units

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to an oil separator and an air conditioner outdoor unit.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

An air conditioner is a device which makes the refrigerant inside the air conditioner perform a refrigeration cycle consisting of a compression process, a condensation process, an expansion process and an evaporation process. In an air conditioner, a refrigerant compressed to a high temperature and pressure state is radiated to the outside in a condenser, and the temperature and pressure of the refrigerant are significantly reduced while passing through an expansion valve, and then the low temperature and low pressure refrigerant absorbs heat while passing through an evaporator and finally flows back to a compressor again. The compression, condensation and expansion processes are performed in the outdoor unit of the air conditioner, and the evaporation process is performed by the action of the blower fan and the evaporator in the indoor unit.

In the air-conditioning refrigeration system, the compressor usually needs lubricating oil to normally operate, and the lubricating oil can be mixed in the exhaust of the compressor, so that an oil separator is generally arranged between an exhaust port of the compressor and a condenser and used for separating the lubricating oil in high-pressure gas exhausted by the compressor, so that the lubricating oil can return to the compressor to ensure the normal operation of the compressor, the oil shortage of the compressor is prevented, and meanwhile, excessive oil is prevented from entering the condenser and the evaporator to influence the heat exchange efficiency.

In the prior art, a filter screen is additionally arranged in the separator for enhancing the separation effect, so that the volume of the oil separator is larger, and the separation efficiency is influenced because the filter holes of the filter screen are too dense and the pressure drop is too large in the separation process.

Disclosure of Invention

The invention aims to at least solve the problems of overlarge pressure drop and low separation efficiency caused by arranging a filter screen in an oil separator in the prior art. The purpose is realized by the following technical scheme:

a first aspect of the present invention provides an oil separator including:

the lower end of the tank body is provided with an oil outlet;

the inlet pipe is connected to the tank body, and the center line of the inlet pipe is parallel to the horizontal direction;

the air outlet pipe is connected to the upper end of the tank body, and at least part of the air outlet pipe extends into the tank body;

the tank body is provided with an axis surface, the axis surface is a plane passing through the central axis of the tank body, the central line of the inlet pipe is arranged in an eccentric mode relative to the axis surface, and the inlet pipe is integrally located on one side of the axis surface.

According to the oil separator disclosed by the embodiment of the invention, compared with the conventional oil separator, the flow direction of a mixture formed by lubricating oil and exhaust gas is changed, so that the mixture has a tangential speed, the mixture can rotate in the tank body, oil-gas separation is realized through centrifugal force, the tangential speed is provided for the mixture, the mixture is prevented from directly colliding with the tank body, the kinetic energy loss is reduced, the separation speed is accelerated, and the separation effect is improved. The central line of the inlet pipe is eccentrically arranged relative to the axial center plane, namely, a certain distance exists between the mixture and the axial center plane when the mixture enters the tank body, so that the separation path is prolonged, the rotating time of the mixture in the tank body is prolonged, and the separation effect is further improved. This application has cancelled the setting of filter screen, and the mixture utilizes rotary motion to realize oil-gas separation after getting into jar body, and the pressure drop is little. The central line of import pipe is parallel with the horizontal direction of jar body, on the one hand, avoids the mixture to take place unnecessary collision along the ascending import pipe outflow of slope and the upper end of jar body, and on the other hand, avoids the mixture to flow to the oil-out along the decurrent import pipe outflow of slope with higher speed, can not give the separation sufficient time and the separation efficiency who causes low to improve separation efficiency.

In some embodiments of the invention, the lower end of the air outlet pipe is lower than the inlet pipe along the axial direction of the tank body, a separation channel is formed between the part of the air outlet pipe extending into the tank body and the tank body, and the inlet pipe is communicated with the separation channel.

In some embodiments of the invention, the ratio of the axial distance between the inlet pipe and the outlet pipe to the radial dimension of the tank is equal to or greater than 0.5.

In some embodiments of the present invention, a lower end of the outlet pipe is higher than the inlet pipe in an axial direction of the tank.

In some embodiments of the invention, the ratio of the axial distance between the inlet pipe and the oil outlet to the radial dimension of the tank is greater than or equal to 0.2.

In some embodiments of the invention, the ratio of the axial distance between the outlet pipe and the inlet pipe to the radial dimension of the tank is equal to or greater than 0.5.

In some embodiments of the present invention, the end of the inlet pipe connected to the tank is located on or outside the inner wall of the tank in the axial projection of the tank.

In some embodiments of the invention, the inner wall of the inlet pipe is tangential to the inner wall of the tank.

In some embodiments of the invention, the lower end of the tank is arranged to slope towards the oil outlet.

A second aspect of the present invention provides an outdoor unit of an air conditioner, including:

a compressor;

an oil separator according to any one of the above aspects, the oil separator being connected to a downstream oil separator of the compressor.

The air conditioner outdoor unit of the embodiment of the invention has the same beneficial effects as the oil separator in the embodiment, and the details are not repeated herein.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic illustration of an oil separator according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic of an oil separator according to another embodiment of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic illustration of an oil separator according to another embodiment of the present invention;

FIG. 6 is a schematic illustration of an oil separator according to another embodiment of the present invention;

FIG. 7 is a schematic view of one manner of connecting an inlet tube to a tank in accordance with an embodiment of the present invention;

FIG. 8 is a schematic view of another way in which an inlet tube may be connected to a tank according to an embodiment of the present invention.

The reference symbols in the drawings denote the following:

1. an inlet pipe; 11. a connecting portion;

2. a tank body;

3. an air outlet pipe;

4. an oil outlet pipe;

5. an axial center plane.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 8, an oil separator according to an embodiment of the present invention includes:

the lower end of the tank body 2 is provided with an oil outlet;

the device comprises an inlet pipe 1, wherein the inlet pipe 1 is connected to a tank body 2, and the center line of the inlet pipe is parallel to the horizontal direction;

the air outlet pipe 3 is connected with the upper end of the tank body 2, and at least part of the air outlet pipe 3 extends into the tank body 2;

the tank body 2 is provided with an axial center surface 5, the axial center surface 5 is a plane passing through a central axis of the tank body 2, a central line of the inlet pipe 1 is eccentrically arranged relative to the axial center surface 5, and the whole inlet pipe 1 is positioned on one side of the axial center surface 5.

According to the oil separator disclosed by the embodiment of the invention, compared with the conventional oil separator, the flow direction of a mixture formed by lubricating oil and exhaust gas is changed, so that the mixture has a tangential speed, the mixture can rotate in the tank body 2, oil-gas separation is realized through centrifugal force, the tangential speed is provided for the mixture, the mixture is prevented from directly colliding with the tank body 2, the kinetic energy loss is reduced, the separation speed is accelerated, and the separation effect is improved. The central line of the inlet pipe 1 is eccentrically arranged relative to the axial center plane 5, namely, a certain distance exists between the mixture and the axial center plane 5 when the mixture enters the tank body 2, so that the separation path is prolonged, the time for the mixture to rotate in the tank body 2 is prolonged, and the separation effect is further improved. This application has cancelled the setting of filter screen, and the mixture utilizes rotary motion to realize oil-gas separation after getting into jar body 2, and the pressure drop is little. The tank body 2 is integrally of a cylinder structure and comprises an axial direction and a radial direction, the direction from the oil outlet to the air outlet pipe 3 is the axial direction, and the direction perpendicular to the axial direction is the radial direction. The inside of jar body 2 forms and holds the chamber, when import pipe 1 connects on the side of jar body 2, can be parallel with the radial of jar body 2, can be relative jar radial direction tilt up or down slope 2, in an embodiment, import pipe 1 is parallel with jar radial direction of body 2, on the one hand, avoid the mixture to flow out along the ascending import pipe of slope 1 and take place unnecessary collision with the upper end of jar body 2, on the other hand, avoid the mixture to flow out along the descending import pipe 1 of slope with higher speed mixture flow to the oil-out, can not give the separation enough time and the separation efficiency that causes is low, consequently, finally select to set up import pipe 1 and jar radial parallel of body 2, utilize limited space to improve separation efficiency as far as possible. The inlet pipe 1 referred to here is parallel to the radial direction of the tank body 2, and does not mean that all the inlet pipes 1 are parallel to the radial direction of the tank body 2, only the portion of the inlet pipe 1 near the tank body 2 connected to the tank body 2 is required to be parallel to the radial direction, and the rest portion can be adaptively adjusted according to the arrangement position of the upstream part of the oil separator, for example, the inlet pipe 1 includes a first portion and a second portion, the first portion is connected to the upstream part compressor, the second portion is connected to the tank body 2, the first portion and the second portion are in circular arc transition connection, only the second portion is required to be parallel to the radial direction of the tank body 2, the angle between the first portion and the second portion can be an acute angle, a right angle or an obtuse angle, and the bending direction can be upward, downward, leftward or rightward. As shown in fig. 1, 2, 5 and 6, the inlet pipe 1 is partially parallel to the radial direction of the can body 2 and partially bent upward, and as shown in fig. 3 and 4, the inlet pipe 1 is partially parallel to the radial direction of the can body 2 and partially bent leftward or rightward in the horizontal direction.

It should be noted that, in other embodiments, the gas outlet pipe 3 may be connected to the side surface of the tank 2, and since the gas has a density lower than that of the lubricating oil and flows upward, the gas outlet pipe 3 is connected to the upper end of the tank 2 for better discharging the gas. The inlet pipe 1 can be connected to the side, the upper end or the lower end of the tank body 2, and the tail end of the inlet pipe 1 can be connected to the tank body 2 and can also extend into the tank body 2. To achieve the tangential velocity imparted to the oil-gas mixture, there are several ways: firstly, an inlet pipe 1 extends into a tank body 2 from the lower end, the center line of the inlet pipe 1 is eccentrically arranged relative to an axis surface 5, the center line of the inlet pipe 1 is parallel to the axis surface 5, an arc-shaped guide plate is arranged at the tail end of the inlet pipe 1, and the collision between a mixture and the guide plate is reduced through the arc shape, so that the mixture can stably enter the tank body 2; secondly, the inlet pipe 1 extends into the tank body 2 from the lower end, the central line of the inlet pipe 1 is eccentrically arranged relative to the axis surface 5, the central line of the inlet pipe 1 is parallel to the axis surface 5, and the tank body 2 is internally provided with an arc-shaped guide plate which reduces the collision between the mixture and the guide plate through the arc shape so that the mixture can stably enter the tank body 2; thirdly, the inlet pipe 1 extends into the tank body 2 from the lower end, the structure of the inlet pipe 1 is changed, the tail end of the inlet pipe 1 is bent towards the axial center surface 5 of the tank body 2, the center line of the inlet pipe 1 is gradually intersected with the axial center surface 5 in a separated mode, so that a mixture flowing out of the inlet pipe 1 has a speed direction, the mixture enters the tank body 2 from the inlet pipe 1, the mixture flows along the bent tail end of the inlet pipe 1, the mixture already has the speed direction after flowing out of the inlet pipe 1, and the mixture keeps the speed direction and then enters the tank body 2 to continue flowing; fourthly, the inlet pipe 1 is connected with the side surface of the tank body 2, part of the inlet pipe extends into the tank body 2, the structure of the inlet pipe 1 is changed, the tail end of the inlet pipe 1 is bent towards the axial center surface 5 of the tank body 2, the center line of the inlet pipe 1 is gradually intersected with the axial center surface 5 through separation, so that a mixture flowing out of the inlet pipe 1 has a speed direction, the mixture enters the tank body 2 from the inlet pipe 1 and flows along the bent tail end of the inlet pipe 1, the mixture already has the speed direction after flowing out of the inlet pipe 1, and the mixture keeps the speed direction and then continuously flows into the tank body 2; fifthly, the inlet pipe 1 is connected with the side surface of the tank body 2, the center line of the inlet pipe 1 is eccentrically arranged relative to the axis surface 5, the center line of the inlet pipe 1 is parallel to the axis surface 5, the inlet pipe 1 is integrally positioned on one side of the axis surface 5, and the mixture is guided to flow along the tank body 2 after flowing out of the inlet pipe 1 through the eccentric distance, so that the collision between the mixture and the tank body 2 is reduced, and the mixture can stably enter the tank body 2; and sixthly, the combination of the modes. The above manner is merely illustrative and not limiting of the manner in which the tangential velocity is provided to the mixture herein. The fifth way of providing tangential velocity is explained as an example below.

In some embodiments of the present invention, since the oil separator is installed in the outdoor unit of the air conditioner, the size of the oil separator may affect the size of the outdoor unit of the air conditioner, and therefore, it is necessary to fully utilize the size of the accommodating cavity formed by the tank body 2 to improve the separation effect in a limited space. According to the foregoing, as shown in fig. 1 to 4, the inlet pipe 1 is connected to the side surface of the tank body 2, the outlet pipe 3 is connected to the upper end of the tank body 2, in order to make the mixture stay in the tank body 2 for a sufficient time for separation, the position where the mixture enters the tank body 2 needs to be set close to the upper end of the tank body 2, at least part of the outlet pipe 3 extends into the tank body 2, then the inner wall of the tank body 2 and the outer wall of the outlet pipe 3 form a cyclone separation channel, the mixture flows along the inner wall of the tank body 2 and the outer wall of the outlet pipe 3 after entering the cyclone separation channel, under the action of different dead weights of oil and gas, the oil falls down to the oil outlet, and the gas enters the outlet pipe 3 to be discharged, so as to realize oil-gas separation. When the mixture flows in the cyclone separation channel, the inner wall of the tank body 2 and the outer wall of the air outlet pipe 3 limit the flow direction of the mixture, so that the mixture stays in the tank body 2 for a long enough time under the condition of tangential speed, and the separation effect is further improved. The size of the portion of the outlet pipe 3 protruding into the vessel body 2 is related to the size of the cyclone passage formed, and therefore, in the case of a limited space, the lower end of the outlet pipe 3 is set lower than the inlet pipe 1 to increase the size of the cyclone passage, and further, the ratio of the axial distance L1 between the inlet pipe 1 and the outlet pipe 3 to the radial size of the vessel body 2 in the axial direction of the vessel body 2 is 0.5 or more.

Wherein, the axial dimension of the tank body 2 is 150mm, and the axial distance between the central line of the tail end of the inlet pipe 1 connected with the tank body 2 and the upper end of the tank body 2 is 45 mm.

In some embodiments of the invention, the shape of the cyclonic separation channel determines the flow velocity of the mixture, and the outer wall of the outlet duct 3 is curved and the inner wall of the tank 2 is curved to reduce the collision between the mixture and the tank 2 and the outlet duct 3. The radiuses of the arc surfaces of the tank body 2 and the air outlet pipe 3 can be the same or different; the arc surface of the tank body 2 can be an arc surface with equal radius at any position or an arc surface formed by splicing different radii; the arc surface of the air outlet pipe 3 can be an arc surface with equal radius everywhere, and also can be an arc surface formed by splicing different radii. As shown in fig. 2 and 4, in an embodiment, the radius of the outer wall of the outlet pipe 3 is equal everywhere, the radius of the inner wall of the tank body 2 is equal everywhere, and the outlet pipe 3 is concentrically arranged with the tank body 2, and the shape of the cyclone separation channel formed by the outlet pipe 3 and the tank body 2 is closer to the regular circular channel, so that the collision between the mixture and the tank body 2 and the outlet pipe 3 can be further reduced, and the loss of kinetic energy can be further reduced.

In some embodiments of the present invention, the center line of the inlet pipe 1 is eccentrically disposed with respect to the axial surface 5, and the distance between the center line of the inlet pipe 1 and the axial surface 5 is equal everywhere, that is, the center line of the inlet pipe 1 is parallel to the axial surface 5, and the inlet pipe 1 is entirely located on one side of the axial surface 5. The distance between the central line of the inlet pipe 1 and the axis surface 5 is larger than zero, and the limit position between the central line of the inlet pipe 1 and the axis surface is that the inner wall of the inlet pipe 1 is tangent to the inner wall of the tank body 2, so that the mixture flowing out along the inner wall of the inlet pipe 1 can be directly transited to flow continuously along the inner wall of the tank body 2, and the kinetic energy loss is further reduced.

In some embodiments of the present invention, the lower end of the outlet pipe 3 is lower than the inlet pipe 1 according to the foregoing, and in other embodiments, as shown in fig. 5 to 6, the lower end of the outlet pipe 3 may be disposed higher than the inlet pipe 1 in the axial direction of the tank 2. Under this kind of circumstances, then need reduce the size that outlet duct 3 stretches into jar body 2, just need be as far as possible with the partial setting ground that outlet duct 3 is located jar body 2 inside near the upper end of jar body 2 to the gas after the separation can in time be followed outlet duct 3 and is discharged. The inlet pipe 1 is connected to the side of the tank 2, and the position of the inlet pipe 1 can be close to the upper end or the lower end of the tank 2, and can also be arranged in the middle area of the tank 2, and in one embodiment, the position of the inlet pipe 1 is arranged in the middle area of the tank 2. However, the axial distance between the inlet pipe 1 and the outlet pipe 3 and the axial distance between the inlet pipe 1 and the oil outlet have an influence on the staying time and the separation effect of the mixture in the tank body 2. Through a plurality of experiments, the ratio of the axial distance L2 between the inlet pipe 1 and the oil outlet to the radial dimension of the tank body 2 is set to be more than or equal to 0.2, namely a certain distance needs to be kept between the inlet pipe 1 and the oil outlet, so that after the mixture enters the tank body 2, the region between the inlet pipe 1 and the oil outlet is rotated to realize oil-gas separation, the ratio of the axial distance L3 between the outlet pipe 3 and the inlet pipe 1 to the radial dimension of the tank body 2 is more than or equal to 0.5, the mixture flows along the inner wall of the tank body 2 after entering the tank body 2 and contacts with the inner wall of the tank body 2, the axial distance exists between the outlet pipe 3 and the inlet pipe 1, the oil amount adhered to the exhaust pipe is reduced, and the lubricating oil flows out of the oil outlet as much as possible.

The difference from the previous embodiment is only the relative position of the inlet pipe 1 and the outlet pipe 3, the axial size of the tank body 2 is 150mm, the axial distance between the central line of the end of the inlet pipe 1 connected with the tank body 2 and the upper end of the tank body 2 is 85mm, and the rest is the same as the previous embodiment.

In some embodiments of the present invention, the inlet pipe 1 and the tank 2 are non-detachably connected, and may be integrally manufactured, welded or bonded, and the non-detachable connection is adopted to prevent the connection between the inlet pipe 1 and the tank 2 from being failed due to vibration generated by the operation of the outdoor unit of the air conditioner. As shown in fig. 7, the inlet pipe 1 and the tank 2 may be such that the end of the inlet pipe 1 is connected with the inner wall of the tank 2, and the end of the inlet pipe 1 connected with the tank 2 is located on the inner wall of the tank 2 along the axial projection of the tank 2. As shown in fig. 8, a connection portion 11 may also be processed on the outer wall of the tank body 2, the outer wall of the tank body 2 extends outward to form the connection portion 11 with a hollow structure, the end of the inlet pipe 1 connected with the tank body 2 is located on the outer side of the inner wall of the tank body 2 along the axial projection of the tank body 2, the inner diameter of the connection portion 11 is less than or equal to the outer diameter of the inlet pipe 1, and then the connection is realized through a welding or bonding process, the inlet pipe 1 does not need to extend into the inner portion of the tank body 2, and the space size of the accommodating cavity of the tank body 2 is utilized as much as possible to fully separate the mixture. At least part of the air outlet pipe 3 is positioned in the tank body 2, the air outlet pipe 3 is also connected with the tank body 2 in a non-detachable mode, the air outlet pipe and the tank body 2 can be integrally manufactured, welded or bonded, and the non-detachable connection is adopted, so that the problem that the connection between the air outlet pipe 3 and the tank body 2 fails due to vibration generated by the operation of an air conditioner outdoor unit is avoided.

Wherein, in general, the end of the inlet pipe 1 does not extend into the interior of the tank 2, the mixture flows out from the inlet pipe 1, and the mixture rotates along the inner wall of the tank 2 into the interior of the tank 2 as shown in fig. 7. As shown in fig. 8, the mixture flows out from the inlet pipe 1, continues to flow along the connecting part 11, and finally enters the inside of the tank 2 along the inner wall of the tank 2 to rotate.

In some embodiments of the present invention, to facilitate collection and connection of the separated oil to downstream components, as shown in fig. 1, 3, 5 to 6, the oil separator further includes an oil outlet pipe 4, and the oil outlet pipe 4 is connected to the oil outlet. The oil outlet pipe 4 is connected with the tank body 2 in a non-detachable mode, can be integrally manufactured, welded or bonded, and is prevented from being failed in connection between the oil outlet pipe 4 and the tank body 2 due to vibration generated in operation of the outdoor unit of the air conditioner.

In some embodiments of the present invention, during the separation process of the mixture entering the tank 2, there is a situation where oil adheres to the inner wall of the tank 2, and in order to accelerate the flow rate of oil to the oil outlet, as shown in fig. 1, 3, 5 to 6, the lower end of the tank 2 is set to be a slope inclined toward the oil outlet, and the oil is accelerated toward the oil outlet by gravity. Further, the upper end of the tank body 2 is set to be an inclined plane inclined towards the air outlet pipe, and when oil is adhered to the inner wall of the upper end of the tank body 2, the inclined plane can accelerate the flow and the dripping of the oil and accelerate the separation speed.

The embodiment of the present application further provides an air conditioner outdoor unit, including:

a compressor;

and the oil separator is the oil separator in any embodiment, and is connected with the downstream oil separator of the compressor.

The air conditioner outdoor unit of the embodiment of the present application has the same beneficial effects as the oil separator in the above embodiments, and is not described herein again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An oil separator, comprising:

the lower end of the tank body is provided with an oil outlet;

the inlet pipe is connected to the tank body, and the center line of the inlet pipe is parallel to the horizontal direction;

the air outlet pipe is connected to the upper end of the tank body, and at least part of the air outlet pipe extends into the tank body;

the tank body is provided with an axis surface, the axis surface is a plane passing through the central axis of the tank body, the central line of the inlet pipe is arranged in an eccentric mode relative to the axis surface, and the inlet pipe is integrally located on one side of the axis surface.

2. The oil separator according to claim 1, wherein a lower end of the outlet pipe is lower than the inlet pipe in an axial direction of the tank body, a separation passage is formed between a portion of the outlet pipe extending into the tank body and the tank body, and the inlet pipe is communicated with the separation passage.

3. The oil separator according to claim 2, wherein a ratio of an axial distance between the inlet pipe and the outlet pipe to a radial dimension of the tank is 0.5 or more.

4. The oil separator according to claim 1, wherein a lower end of the outlet pipe is higher than the inlet pipe in an axial direction of the tank.

5. The oil separator of claim 4, wherein a ratio of an axial distance between the inlet pipe and the oil outlet to a radial dimension of the tank is greater than or equal to 0.2.

6. The oil separator of claim 4, wherein a ratio of an axial distance between the outlet pipe and the inlet pipe to a radial dimension of the tank is equal to or greater than 0.5.

7. The oil separator according to claim 1, wherein a tip of the inlet pipe connected to the tank is located on or outside an inner wall of the tank in a projection in an axial direction of the tank.

8. The oil separator of any one of claims 1-7, wherein an inner wall of the inlet tube is tangential to an inner wall of the tank.

9. An oil separator according to any one of claims 1-7, wherein a lower end of said tank is arranged to be inclined towards said oil outlet.

10. An outdoor unit of an air conditioner, comprising:

a compressor;

an oil separator according to any one of claims 1-9, connected downstream of the compressor.

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