CN217383388U

CN217383388U - Oil return device and oil separator

Info

Publication number: CN217383388U
Application number: CN202221009631.6U
Authority: CN
Inventors: 朱成威
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-06
Anticipated expiration: 2032-04-28

Abstract

The utility model relates to an oil returning device and oil separator, its characterized in that, oil returning device includes: a filter assembly having an inlet aperture and an outlet aperture; the transition pipe, at least a part of pipeline section of transition pipe are flexible, and the transition pipe communicates with filtering component, and the internal diameter of transition pipe is less than filtering component's the internal diameter that goes out, and the transition pipe encircles at least round. Lubricating oil mixed in the gas in the oil separator can enter the transition pipe through the inlet hole of the filtering component, and then the lubricating oil is conveyed to the compressor through the transition pipe, so that the lubricating oil is recycled. When lubricating oil is sucked into the compressor through the transition pipe, the resistance of the lubricating oil sucked into the compressor is increased through the smaller inner diameter and the number of surrounding circles of the transition pipe, the flow rate of the lubricating oil reaching the compressor is reduced, the oil return pressure is reduced, the vibration and noise are reduced, and the working state of the compressor is favorably improved. The transition pipe can absorb and buffer vibration conducted by the compressor, and the stability of oil circuit connection is enhanced.

Description

Oil return device and oil separator

Technical Field

The utility model relates to an oil separator technical field especially relates to an oil returning device and oil separator.

Background

In a refrigeration system, a compressor can normally operate only by requiring lubricating oil, lubricating oil can be mixed in high-temperature and high-pressure gas discharged by the compressor, an oil separator is usually arranged between the compressor and a heat exchanger to separate the lubricating oil from gaseous refrigerant, so that the lubricating oil can return to the compressor to ensure the normal operation of the compressor, the lubricating oil is prevented from blocking heat exchange of the refrigerant, and the system efficiency is improved. In general, the oil return pipe of an oil separator has a problem of vibration caused by high pressure, which not only generates noise, but also affects the oil return effect and the operation of the compressor.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an oil return device which can absorb shock and reduce noise, has stable connection and good oil return effect for solving the problem of vibration caused by large pressure at the oil return pipe.

An oil return device, the oil return device comprising:

a filter assembly having an inlet aperture and an outlet aperture;

the transition pipe, at least a part of pipeline section of transition pipe is flexible, the transition pipe with filter component intercommunication, the internal diameter of transition pipe is less than the internal diameter of filter component's exit hole, the transition pipe encircles at least one round.

In one embodiment, the filter assembly includes a filter screen and a collection portion including oil collection holes in communication with the filter screen.

In one of the embodiments, it is characterized in that one end of the filter screen is connected with the collecting part, and the other end of the filter screen encloses a filtering space, and the filter screen further comprises an inclined surface which is inclined towards the direction close to the axis of the collecting part.

In one embodiment, the encircling path of the transition pipe comprises semicircular parts and linear parts, wherein the two linear parts are oppositely arranged, the two semicircular parts are respectively connected with two ends of the two linear parts, the two linear parts are tangent to the two semicircular parts, the radius range of the semicircular parts is 20mm to 30mm, and the length range of the linear parts is 80mm to 120 mm; and/or the presence of a gas in the gas,

the range of the number of winding turns of the transition pipe is 2 to 5; and/or the presence of a gas in the gas,

the outer diameter range of the transition pipe is 2.5mm to 3.5mm, and the inner diameter range of the transition pipe is 1.5mm to 2.5 mm.

In one embodiment, the filter assembly further comprises a connecting pipe, one end of the connecting pipe is vertically connected with the filter assembly, and the other end of the connecting pipe is connected with the transition pipe.

In one embodiment, the transition pipe is arranged in parallel with the connecting pipe.

In one embodiment, the connecting pipe comprises a first butt joint part, the diameter of the first butt joint part is smaller than that of the connecting pipe, one end of the first butt joint part is connected with the connecting pipe, and the other end of the first butt joint part is connected with the transition pipe.

In one embodiment, the filter assembly further comprises an oil return pipe, wherein the oil return pipe comprises a transition part and an extension part, the transition part is connected with the transition pipe, and the extension part is connected with the transition part and arranged in parallel with the filter assembly.

In one embodiment, the oil return pipe further comprises a second butt joint part, the diameter of the second butt joint part is smaller than that of the oil return pipe, one end of the second butt joint part is connected with the transition pipe, and the other end of the second butt joint part is connected with the transition part; and/or the presence of a gas in the gas,

the oil return pipe further comprises a third butt joint part, and the third butt joint part is connected with the extending part.

An oil separator comprises the oil return device.

According to the oil return device, lubricating oil mixed in gas in the oil separator can enter the transition pipe through the inlet hole of the filtering assembly, and then the lubricating oil is conveyed to the compressor through the transition pipe, so that the lubricating oil is recycled. The internal diameter of transition pipe is less than the internal diameter of filter assembly's the exit and transition pipe encircles at least round, and when lubricating oil was inhaled the compressor through transition pipe, compressor oil return entrance pressure was less, and the inside pressure of oil separator is great, through the less internal diameter of transition pipe and encircle the number of rounds, increased the resistance that lubricating oil was inhaled the compressor, reduced the velocity of flow when lubricating oil reachd the compressor, reduced oil return pressure, reduced the production of vibration and noise, be favorable to improving the operating condition of compressor. At least one part of the pipe section of the transition pipe is flexible, so that vibration conducted by the compressor can be absorbed and buffered, the flexible connection effect is achieved, and the stability of oil circuit connection is enhanced. The oil return device can effectively solve the problem that vibration is caused by large pressure at the oil return pipe of the compressor, and can absorb shock and reduce noise, is stable in connection and has a good oil return effect.

The oil separator adopts the oil return device, reduces oil return pressure, reduces vibration and noise, and is favorable for improving the working state of the compressor.

Drawings

Fig. 1 is a schematic structural view of an oil return device in an embodiment;

FIG. 2 is a schematic diagram of an embodiment of an oil separator;

fig. 3 is a partial cross-sectional view of an assembled oil return device in an embodiment.

Description of reference numerals:

10. a filter assembly; 20. a connecting pipe; 30. a transition duct; 40. an oil return pipe; 50. an air inlet pipe; 60. an air outlet pipe; 70. a barrel;

11. filtering with a screen; 12. a collecting section; 21. a first mating portion; 41. a second docking portion; 42. a third docking portion; 80. a first mounting plate; 81. a second mounting plate; 82. a third mounting plate; 83. a fourth mounting plate; 84. a fifth mounting plate; 85. a sixth mounting plate;

111. an inclined surface; 121. an oil collecting hole.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

In a refrigeration system, a compressor needs lubricating oil to normally operate, lubricating oil can be mixed in high-temperature and high-pressure gas discharged by the compressor, an oil separator is usually installed between the compressor and a condenser to separate the lubricating oil from gaseous refrigerant, so that the lubricating oil can return to the compressor to ensure the normal operation of the compressor, the lubricating oil is prevented from blocking heat exchange of the refrigerant, and the system efficiency is improved. In general, the oil return pipe 40 of the oil separator has a problem of vibration caused by a large pressure, which not only generates noise but also affects the oil return effect and the operation of the compressor. Therefore, it is necessary to provide an oil return device that can absorb shock and reduce noise, has stable connection, and has a good oil return effect, in order to solve the problem of vibration caused by a large pressure at the oil return pipe 40.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an oil return device in an embodiment of the present invention, fig. 2 is a schematic structural diagram of an oil separator in an embodiment, and fig. 3 is a partial sectional view of the oil return device in an embodiment after assembly. An embodiment of the utility model provides an oil return device, include: a filter assembly 10 having an inlet aperture and an outlet aperture; transition pipe 30, transition pipe 30 is at least partly section of pipe for flexible, and transition pipe 30 communicates with filter assembly 10, and the internal diameter of transition pipe 30 is less than the internal diameter of the exit hole of filter assembly 10, and transition pipe 30 encircles at least one round. The oil return device separates the lubricating oil mixed in the gas in the oil separator from the gas through the inlet hole of the filtering assembly 10, and then the lubricating oil can enter the transition pipe 30 and then enter the compressor under the action of the compressor through the transition pipe 30, so that the lubricating oil is recycled. The internal diameter of the transition pipe 30 is smaller than the internal diameter of the outlet hole of the filter assembly 10 and the transition pipe 30 surrounds at least one circle, when lubricating oil is sucked into the compressor through the transition pipe 30, the pressure at the oil return inlet of the compressor is smaller, the internal pressure of the oil separator is larger, the smaller internal diameter and the number of surrounding circles of the transition pipe 30 can increase the resistance of the lubricating oil sucked into the compressor, the surrounding structure enables the transition pipe 30 to have a spiral centrifugal effect on the lubricating oil to reduce the flow rate of the lubricating oil, the flow rate of the lubricating oil reaching the compressor can be reduced, the liquid impact on the compressor is reduced, the compressor is protected, meanwhile, the pressure of the oil return workload can be reduced, the generation of vibration and noise is reduced, and the working state of the compressor is favorably improved. At least one part of the transition pipe 30 is flexible, and can absorb and buffer the vibration transmitted by the compressor, thereby playing a role of flexible connection and enhancing the stability of oil circuit connection. The oil return device can effectively solve the problem of vibration caused by large pressure at the position of the oil return pipe 40 of the compressor, and can absorb shock and reduce noise, is stable in connection and has a good oil return effect.

To facilitate the collection and filtration of the lubricant, in one embodiment, the filter assembly 10 includes a screen 11 and a collector 12, the collector 12 including oil collection holes that communicate with the screen 11. The lubricating oil in the oil separator flows down along the inner wall of the cylinder 70 or falls down under the action of gravity to reach the filter screen 11 of the filter assembly 10, and then enters the oil collecting hole of the collecting part 12 through the filter screen 11 to realize the filtration and collection of the lubricating oil, and the oil collecting hole is communicated with the transition pipe 30, so that the lubricating oil can flow into the transition pipe 30.

In order to increase the contact surface of the filter screen 11 and the lubricating oil in the oil separator, in one embodiment, one end of the filter screen 11 is connected with the collecting part 12, one end of the filter screen 11 is sleeved on one end of the collecting part 12 and welded through roll welding, the other end of the filter screen 11 encloses a filtering space, and the filter screen 11 further comprises an inclined surface which inclines towards the direction close to the axis of the collecting part 12. The inclined plane has two, inclines to the direction of being close to the axis of collection portion 12 through two inclined planes to the contact department on two inclined planes connects, realizes enclosing into filtration space with filter screen 11, and simple process is convenient for produce, and has simplified the structure of filter screen 11 subassembly. The filtering space of the filter screen 11 increases the contact surface of the filter screen 11 and lubricating oil, and the filtering and oil collecting effects of the filter assembly 10 are improved.

In order to increase the resistance of the lubricant oil sucked into the compressor, further reduce the flow rate of the lubricant oil reaching the compressor, and reduce the pressure of the oil return operation, in one embodiment, the circular path of the transition pipe 30 includes semicircular portions and straight portions, the two straight portions are oppositely disposed, the two semicircular portions are respectively connected to two ends of the two straight portions, and both the two straight portions are tangent to the two semicircular portions, the radius of the semicircular portions ranges from 20mm to 30mm, and the length of the straight portions ranges from 80mm to 120 mm. Optionally, the radius of the semicircular part is 20mm or 25mm or 30mm, and the length of the linear part is 80mm or 100mm or 120 mm.

Further, in order to increase the resistance of the lubricant oil being sucked into the compressor, the number of the winding turns of the transition duct 30 ranges from 2 to 5 turns in one embodiment. Optionally, the transition duct 30 is wrapped 2 or 3 or 4 or 5 turns.

Further, to increase the resistance of the lubricant oil being sucked into the compressor, in one embodiment, the transition pipe 30 is a capillary pipe, the transition pipe 30 has an outer diameter ranging from 2.5mm to 3.5mm, and the transition pipe 30 has an inner diameter ranging from 1.5mm to 2.5 mm. Optionally, the transition duct 30 has an outer diameter of 3.2mm and the transition duct 30 has an inner diameter of 2.0 mm.

To further buffer the flow rate of the filtered lubricant to the compressor, in one embodiment, a connection pipe 20 is further included, one end of the connection pipe 20 is vertically connected to the filter assembly 10, and the other end of the connection pipe 20 is connected to the transition pipe 30.

Optionally, in one embodiment, the transition pipe 30 is disposed in parallel with the connection pipe 20, so that the flow direction of the lubricant in the transition pipe 30 is stabilized, and vibration is reduced.

To facilitate the connection of the connection pipe 20 and the transition pipe 30, in one embodiment, the connection pipe 20 includes a first butt-joint portion 21, a diameter of the first butt-joint portion 21 is smaller than a diameter of the connection pipe 20, one end of the first butt-joint portion 21 is connected to the connection pipe 20, and the other end of the first butt-joint portion 21 is connected to the transition pipe 30.

To connect the transition duct 30 to the compressor and further reduce the flow rate of the lubricant reaching the compressor and reduce the return pressure, in one embodiment, an oil return duct 40 is included, the oil return duct 40 including a transition portion connected to the transition duct 30 and an extension portion connected to the transition portion and disposed parallel to the filter assembly 10. The transition part is smoothly connected with the transition pipe 30 in a curvature way, so that the flow direction of the lubricating oil is ensured to be stable. The lubricating oil is guided to an oil return port of the compressor through the extension portion.

In order to facilitate the connection of the transition pipe 30 with the oil return pipe 40, in one embodiment, the oil return pipe 40 further includes a second butt-joint portion 41, a diameter of the second butt-joint portion 41 is smaller than a diameter of the oil return pipe 40, one end of the second butt-joint portion 41 is connected with the transition pipe 30, and the other end of the second butt-joint portion 41 is connected with the transition portion.

In order to facilitate the connection of the oil return pipe 40 to the oil return port of the compressor, in one embodiment, the oil return pipe 40 further includes a third abutting portion 42, and the third abutting portion 42 is connected to the extending portion.

An oil separator comprises the oil return device. The oil separator also comprises an air inlet pipe 50, an air outlet pipe 60, a cylinder body 70 and a mounting assembly, wherein the air inlet pipe 50 and the air outlet pipe 60 are arranged at the top of the oil separator, are connected with an air outlet of the compressor through the air inlet pipe 50, and are connected with an input port of the heat exchanger through the air outlet pipe 60. The oil return device is arranged at the lower part of the cylinder 70, namely at the end of the cylinder 70 relatively far away from the air inlet pipe 50. The mounting assembly comprises a first mounting plate 80, a second mounting plate 81, a third mounting plate 82, a fourth mounting plate 83, a fifth mounting plate 84 and a sixth mounting plate 85, the second mounting plate 81 and the fourth mounting plate 83 are respectively connected with the top and the bottom of the oil separator, the first mounting plate 80, the third mounting plate 82, the fifth mounting plate 84 and the sixth mounting plate 85 are respectively connected with the side wall of the cylinder 70, and the oil separator is fixedly mounted through the mounting assembly.

The oil return device separates the lubricating oil mixed in the gas in the oil separator from the gas through the inlet hole of the filtering assembly 10, and then the lubricating oil can enter the transition pipe 30 and then enter the compressor through the transition pipe 30, so that the lubricating oil is recycled. The inner diameter of the transition pipe 30 is smaller than the inner diameter of the outlet hole of the filter assembly 10 and the transition pipe 30 surrounds at least one circle, when the lubricating oil is sucked into the compressor through the transition pipe 30, the pressure at the oil return inlet of the compressor is smaller, the pressure inside the oil separator is larger, the resistance of the lubricating oil sucked into the compressor is increased through the smaller inner diameter and the surrounding circles of the transition pipe 30, the flow rate of the lubricating oil reaching the compressor is reduced, the oil return pressure is reduced, the generation of vibration and noise is reduced, and the working state of the compressor is favorably improved. At least one part of the transition pipe 30 is flexible, and can absorb and buffer the vibration transmitted by the compressor, thereby playing a role of flexible connection and enhancing the stability of oil circuit connection. The oil return device can effectively solve the problem that vibration is caused by large pressure at the oil return pipe 40 of the compressor, and can absorb shock and reduce noise, is stable in connection and has a good oil return effect.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An oil return device, characterized in that, oil return device includes:

a filter assembly having an inlet aperture and an outlet aperture;

2. The oil return device of claim 1 wherein the filter assembly includes a filter screen and a collection portion, the collection portion including an oil collection aperture, the oil collection aperture in communication with the filter screen.

3. The oil return device of claim 2, wherein one end of the filter screen is connected to the collection portion and the other end of the filter screen encloses a filtering space, the filter screen further comprising an inclined surface that is inclined toward a direction that is close to the axis of the collection portion.

4. The oil return device according to claim 1, wherein the encircling path of the transition pipe comprises semicircular parts and linear parts, the two linear parts are oppositely arranged, the two semicircular parts are respectively connected with two ends of the two linear parts, the two linear parts are tangent with the two semicircular parts, the radius of each semicircular part ranges from 20mm to 30mm, and the length of each linear part ranges from 80mm to 120 mm; and/or the presence of a gas in the gas,

5. The oil return device of claim 1, further comprising a connecting pipe, wherein one end of the connecting pipe is vertically connected to the filter assembly, and the other end of the connecting pipe is connected to the transition pipe.

6. The oil return device of claim 5 wherein the transition pipe is disposed parallel to the connecting pipe.

7. The oil return device of claim 5, wherein the connecting pipe includes a first butt joint portion having a diameter smaller than a diameter of the connecting pipe, one end of the first butt joint portion being connected to the connecting pipe, and the other end of the first butt joint portion being connected to the transition pipe.

8. The oil return device according to claim 1, further comprising an oil return pipe, wherein the oil return pipe comprises a transition portion and an extension portion, the transition portion is connected with the transition pipe, and the extension portion is connected with the transition portion and arranged in parallel with the filter assembly.

9. The oil return device of claim 8 wherein the oil return pipe further comprises a second docking portion, the second docking portion having a diameter smaller than the diameter of the oil return pipe, one end of the second docking portion being connected to the transition pipe, the other end of the second docking portion being connected to the transition portion; and/or the presence of a gas in the gas,

10. An oil separator, characterized by comprising the oil return device according to any one of claims 1 to 9.