CN119533014A - Oil separation device and refrigeration equipment thereof - Google Patents

Abstract

The present application relates to an oil separation device and a refrigeration device thereof, wherein the oil separation device comprises a shell; a separation mechanism comprises a first pipeline and a first sealing plate, a side wall of the first pipeline close to a first outlet end is provided with a first guide channel, and the first sealing plate is provided at the first outlet end; an oil-gas mixture enters the first pipeline through a first inlet end, and after being separated for the first time by the first sealing plate, enters the first guide channel; an inner cylinder is sleeved on the outer side of the separation mechanism, a first separation channel is formed between the inner cylinder and the first pipeline, and a second separation channel is formed between the inner cylinder and the shell; a filter layer is provided on the side wall of the inner cylinder, and a second separation is performed on the oil-gas mixture flowing out through the first guide channel; a cooling mechanism is provided in the second separation channel; the oil-gas mixture flowing out of the filter layer flows through the cooling mechanism and is condensed into a liquid mixture, and the liquid mixture flows to the side wall of the inner cylinder located in the second separation channel and is heated to complete a third separation.

Description

Oil separation device and refrigeration equipment thereof

Technical Field

The application relates to the technical field of vapor compression refrigeration, in particular to an oil separation device and refrigeration equipment thereof.

Background

In the technical field of refrigeration compressors, refrigeration compressors employing conventional oil-lubricated bearings rely on lubricating oil of a certain viscosity to ensure efficient, stable operation thereof. The lubricating oil may lubricate the moving parts to reduce friction and wear, reduce rotational friction power consumption, and help reduce the temperature of the moving parts. Meanwhile, the lubricating oil also strengthens the sealing effect inside the compressor and prevents the refrigerant from leaking. However, due to some miscibility between the lubricant and the refrigerant, a mixture of refrigerant and oil is formed as the refrigerant flows through the compressor. During this process, a portion of the lubrication oil may be carried out of the compressor and into other components of the refrigeration system along with the refrigerant.

In refrigeration systems such as screw compressors, the principle of operation is dependent on the clearance seal between the rotor and the housing, and between the rotors. In order to ensure good lubrication and sealing, a certain amount of lubricating oil needs to be injected into the working chamber during operation of the compressor. However, this also results in a large amount of lubrication oil being carried in the refrigerant vapor discharged from the compressor. Excessive lubrication oil entering the condenser and the evaporator can seriously affect the heat exchange effect, thereby reducing the efficiency of the whole refrigeration system.

Disclosure of Invention

The application provides an oil separating device and refrigeration equipment thereof, which can realize effective separation of lubricating oil, prevent the lubricating oil from being brought into a condenser and an evaporator, influence the heat exchange effect and improve the efficiency of the whole refrigeration equipment.

In a first aspect, the present application provides an oil separation device comprising:

A housing;

The separation mechanism comprises a first pipeline and a first sealing plate, wherein the first pipeline is provided with a first inlet end and a first outlet end, a first diversion channel is arranged on the side wall of the first pipeline close to the first outlet end, the first inlet end penetrates out of the shell, and the first sealing plate is arranged at the first outlet end;

an inner cylinder arranged in the shell and sleeved outside the separating mechanism, a first separating channel is formed between the inner cylinder and the first pipeline, and a second separating channel is formed between the inner cylinder and the shell, wherein the side wall of the inner cylinder is provided with a filter layer which is used for separating the oil-gas mixture flowing out through the first diversion channel for the second time, and

The cooling mechanism is arranged in the second separation channel and is connected with the inner cylinder, wherein the oil-gas mixture flowing out of the filter layer is condensed into a liquid mixture through the cooling mechanism, and the liquid mixture flows to the side wall of the inner cylinder positioned in the second separation channel and exchanges heat with the inner cylinder so as to finish the third separation.

In one possible implementation, the first diversion channel includes a plurality of airflow channels and a plurality of first oil channels, the plurality of airflow channels are sequentially arranged along the circumference of the first pipeline and penetrate through the side wall of the first pipeline, and the airflow channels are configured to convey the oil-gas mixture subjected to the first separation;

A plurality of first oil passages are positioned at the first outlet end of the first pipeline, are distributed along the circumferential direction of the first pipeline and penetrate through the side wall of the first pipeline, and are arranged to convey lubricating oil subjected to first separation;

wherein the air flow passage and the first oil passage are not in communication.

In one possible implementation, the circumferential outer side wall of the first duct is provided with a plurality of baffles, which are provided at the edges of the airflow channel;

wherein, the guide plate is a preset angle with the first pipeline.

In one possible implementation manner, a baffle is disposed on the circumferential outer side wall of the first pipe, and the baffle is disposed on a side of the airflow channel near the first inlet end, where a first preset distance is provided between the baffle and the inner cylinder.

In one possible implementation manner, the first sealing plate comprises a flat plate, a first annular plate and a second annular plate, the flat plate is connected with the second annular plate through the first annular plate, and the second annular plate is provided with a plurality of first oil passing holes;

The first annular plate is obliquely arranged relative to the flat plate and the second annular plate respectively, the flat plate is connected with the first outlet end of the first pipeline so as to block the first outlet end, and the second annular plate is connected with the inner cylinder.

In one possible implementation manner, the inner cylinder comprises a first cylinder body and a second cylinder body, the first cylinder body is connected with the first pipeline, the second cylinder body is connected with the first sealing plate, and the side wall of the first cylinder body is provided with the filter layer.

In one possible implementation manner, the first cylinder body includes a second sealing plate and a first ring cylinder, the second sealing plate is disposed on a side, away from the second cylinder body, of the first ring cylinder so as to seal off the first separation channel, and the second sealing plate is connected with the first pipeline.

In one possible implementation, the filter layer includes a filter screen body, and the first ring cylinder is provided with an avoidance opening to embed the filter screen body.

In one possible implementation, the second cylinder includes a second ring cylinder and a support ring plate, the second ring cylinder being connected to the first sealing plate;

the support ring plate is connected with the radial inner wall side of the second ring cylinder and is used for supporting the first ring cylinder, a second preset distance is reserved between the support ring plate and the first pipeline, and a plurality of second oil passing holes are formed in the support ring plate.

In one possible implementation, the ring diameter dimension of the support ring plate is greater than or equal to the wall thickness dimension of the first ring cartridge.

In one possible implementation, the cooling mechanism includes a spiral pipe wound on a radially outer sidewall of the inner cylinder and disposed in correspondence with the filter layer;

the spiral pipeline is provided with a second inlet end and a second outlet end, and the second inlet end and the second outlet end penetrate out of the shell, wherein the spiral pipeline is arranged to accommodate a refrigerant.

In one possible implementation, the device comprises a oil collecting tank arranged in the second separation channel, and the oil collecting tank is respectively connected with the shell and the inner cylinder

In one possible implementation manner, the oil collecting groove comprises a first folded edge, a third annular plate and a second folded edge which are sequentially connected, the third annular plate is obliquely arranged relative to the first folded edge and the second folded edge respectively, the first folded edge is connected with the shell, and the second folded edge is connected with the inner barrel;

wherein, the second flange is provided with a plurality of third oil holes.

In one possible implementation, the first fold is provided with a plurality of balancing holes.

In one possible implementation manner, the two sides of the shell along the axial direction of the shell are respectively provided with an oil outlet and an air outlet, wherein the air outlet and the first inlet end are positioned on the same side.

In a second aspect, the present application provides a refrigeration apparatus comprising an apparatus body and an oil separation device as described in the first aspect, the oil separation device being connected to the apparatus body.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the advantages that the oil-gas mixture collides with the first sealing plate through the first pipeline in the separating mechanism to finish the first separation, the oil-gas mixture flowing out of the first diversion channel can collide with the first separating channel and flow towards the filter layer to finish the second separation, the mixture is condensed into the liquid mixture after passing through the filter layer, particularly the mixture flushing cooling mechanism of the filter layer, the liquid mixture flows to the side wall of the inner cylinder positioned in the second separating channel, the temperature of the side wall of the inner cylinder of the oil-gas mixture is raised due to the fact that the oil-gas mixture flowing out of the first diversion channel can collide with the first separating channel, the liquid mixture is heated to finish the third separation, the processes of collision, centrifugation, sedimentation, filtration, rectification and the like are performed, so that the step-by-step separation of the oil-gas mixture is realized, the oil drops with large particle diameter, the oil drops with medium particle diameter, the oil drops with small particle diameter and the oil drops with small particle diameter are separated out in sequence, the deep separation of the oil-gas mixture is finished, the refrigerant is prevented from entering the condenser or evaporator, and the efficiency of the whole refrigerating equipment is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

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

FIG. 2 is a schematic cross-sectional view of an oil separator according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of an oil separator according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a separation mechanism according to an embodiment of the present application;

fig. 5 is a schematic structural view of a first sealing plate according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first pipeline according to an embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of an oil separator according to an embodiment of the present application;

FIG. 8 is a schematic structural view of a second seal plate according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a second cylinder according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a cooling mechanism according to an embodiment of the present application;

Fig. 11 is a schematic structural diagram of an oil sump according to an embodiment of the present application.

Reference numerals illustrate:

1. The housing, 11, the accommodating space, 12, the upper cover, 13, the lower cover, 14, the body, 15, the oil outlet, 16, the air outlet, 17, the air inlet, 18, the second separation channel, 19, the support, 2, the separation mechanism, 21, the first pipeline, 211, the first inlet end, 212, the first outlet end, 213, the first diversion channel, 2131, the air flow channel, 2132, the first oil channel, 22, the first sealing plate, 221, the flat plate, 222, the first annular plate, 223, the second annular plate, 2231, the first oil passing hole, 23, the guide plate, 24, the baffle, 3, the inner cylinder, 31, the first separation channel, 32, the filter layer, 33, the first cylinder, 331, the second sealing plate, 3311, the plate body, 3312, the inner hem, 3313, the outer hem, 332, the first annular cylinder, 34, the second cylinder, 341, the second annular cylinder, 342, the support annular plate, 3421, the second oil passing hole, 4, the cooling mechanism, 41, the spiral pipeline, 42, the second inlet end, 43, the second outlet end, the second cylinder, 5, the oil collecting hole, the third hem, 51, the third hem, and 53.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's 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 experiences a positional reversal or a change in attitude or a change in state of motion, then the indications of these directives will also correspondingly change, e.g., an element described as "under" or "under" another element or feature will then be oriented "over" or "over" the other element or feature. Thus, the example term "below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

In the related art, a common oil separator mainly comprises a centrifugal type, a washing type, a filter screen type, a packing type and the like, and the technical principle of the common oil separator mainly utilizes centrifugal force, inertial collision, gravity sedimentation, packing, a filter screen, molecular sieve filtration and other technologies to perform oil-gas separation. However, these techniques have certain limitations in practical applications. For example, centrifugal force, inertial collision and gravity sedimentation are all used for separation by utilizing the density difference of oil and gas, so that only large-particle-size oil drops with the particle size of more than 20um can be separated. The filter screen method relies on the flow direction change, speed reduction, capturing and accumulation of oil and gas when passing through a filter screen, so that small oil drops gradually accumulate into large oil drops and flow to a lower oil groove under the action of gravity, the oil drops with medium particle diameters of 5-20um can be separated, the two modes can not effectively separate the oil drops with small particle diameters of less than 5um, at present, the molecular sieve is better in effect on separating the oil drops with small particle diameters, but the pressure loss is very large due to poor permeability, if the flow speed is reduced by increasing the area, the pressure drop is reduced, the cost is greatly increased, the molecular sieve structure is easy to be blocked, the service life is shorter, periodic replacement is needed, and the maintenance cost is higher.

In order to solve the technical problems, the application provides an oil separation device, an oil-gas mixture collides with a first sealing plate through a first pipeline in a separation mechanism to finish first separation, the oil-gas mixture flowing out of a first diversion channel can collide with the first separation channel and flow towards a filter layer to finish second separation, the oil-gas mixture passes through a filter layer, particularly a mixture flushing cooling mechanism to condense the oil-gas mixture into a liquid mixture, the liquid mixture flows to the side wall of an inner cylinder positioned in the second separation channel, the temperature of the side wall of the inner cylinder of the oil-gas mixture is raised due to the fact that the oil-gas mixture flowing out of the first diversion channel can collide with the first separation channel, the liquid mixture is heated to finish third separation, processes such as collision, centrifugation, sedimentation, filtration, rectification and the like are performed, so that step-by-step separation of the oil-gas mixture is realized, large-particle oil drops, medium-particle-diameter oil drops, small-particle-diameter oil drops and tiny-particle-diameter oil drops are separated out in sequence, deep separation of the oil-gas mixture is finished, refrigerant is prevented from entering a condenser or an evaporator, and efficiency of the whole refrigeration device is improved.

In some exemplary embodiments, as shown in fig. 1-3, an oil separation apparatus is adapted for use in a refrigeration appliance to efficiently separate an oil-gas mixture, preventing lubrication oil from entering other critical components of the refrigeration appliance, such as a condenser and an evaporator, thereby ensuring the overall performance and stability of the refrigeration appliance. The oil separating device comprises a shell 1, a separating mechanism 2, an inner cylinder 3 and a cooling mechanism 4, wherein the connecting modes among the shell 1, the separating mechanism 2, the inner cylinder 3 and the cooling mechanism 4 are all welded, so that the reliability and the stability of the connection among all the components are improved.

The housing 1 is provided with a containing space 11 inside so as to accommodate the separating mechanism 2, the inner cylinder 3 and the cooling mechanism 4, and ensure flatness in appearance. The housing 1 includes a body 14, an upper cover 12 and a lower cover 13, the body 14 is a hollow ring cylinder, the upper cover 12 and the lower cover 13 are both semicircular, and are fastened to the body 14 by welding to close the accommodating space 11, so as to improve the structural stability of the housing 1.

The casing 1 is provided with at least an oil outlet 15, an air outlet 16 and an air inlet 17, for example, and the casing 1 is provided with the oil outlet 15 and the air outlet 16 respectively on both sides in the axial direction thereof. The air inlet 17 is configured to receive an air-fuel mixture, and the air inlet 17 is disposed on the upper cover 12, for example, and has a certain pressure and impact force when the air-fuel mixture is introduced, so as to be capable of moving downward. The air outlets 16 are all arranged on the upper cover 12, for example, the separated refrigerant can flow upwards, and the separated refrigerant is discharged from the air outlets 16. The oil outlet 15 is used for discharging separated lubricating oil, and the oil outlet 15 is provided with a lower cover 13, for example, so as to facilitate centralized recovery.

It should be noted that, some auxiliary components are further disposed on the outer side of the housing 1 to ensure stability of the housing 1. The shell 1 can be connected to a unit bracket or a base through bolts, can be directly welded to the bracket or the base, or can be connected to a foundation preset on the ground through bolts or screws. For example, the lower end of the housing 1 is further provided with a support 19, and the support 19 can be used for supporting the housing 1 to provide balance and stability for the housing 1, so as to avoid shaking of the housing 1. Wherein, support 19 has raised the whole height of casing 1, dodges oil-out 15, conveniently discharges and collect lubricating oil.

In this embodiment, as shown in fig. 2-6, the separation mechanism 2 comprises a first conduit 21 and a first closing plate 22, the first conduit 21 having a first inlet end 211 and a first outlet end 212, the first inlet end 211 being connected to the air inlet 17, for example, and passing out of the housing 1, the first inlet end 211 being for introducing the oil and gas mixture. The side wall of the first duct 21 is provided with a first diversion channel 213 near the first outlet end 212, and the first sealing plate 22 is disposed at the first outlet end 212. The high-temperature and high-pressure oil-gas mixture discharged from the compressor enters the first pipeline 21 through the first inlet end 211, and impacts the first sealing plate 22 at a high speed along the axial direction of the first pipeline 21, so that preliminary impact separation, namely first separation, is realized through the first sealing plate 22, and at the moment, large-particle-size oil drops and part of medium-particle-size oil drops are separated. The large-particle-diameter oil droplets and part of medium-particle-diameter oil droplets which are separated by impact enter the first diversion channel 213 so as to facilitate subsequent collection of lubricating oil, and the oil-gas mixture which is not separated yet is diverted after impacting the first sealing plate 22 so as to flow to the first diversion channel 213 so as to facilitate subsequent secondary separation.

In this embodiment, as shown in fig. 2-7, the inner cylinder 3 is disposed in the accommodating space 11 of the housing 1, the inner cylinder 3 is of a hollow structure, the inner cylinder 3 is sleeved outside the separating mechanism 2, a certain distance is provided between the inner cylinder 3 and the first pipe 21 to form a first separating channel 31, after the oil-gas mixture in the first pipe 21 vertically hits the first sealing plate 22, the oil-gas mixture which is not separated will turn to flow, flow along the first diversion channel 213, the first diversion channel 213 is communicated with the first separating channel 31, and the oil-gas mixture enters the first separating channel 31 and flows upwards. When the oil-gas mixture enters the first separation channel 31, the oil-gas mixture can strike the inner side wall of the inner cylinder 3, and some separation effect can be achieved.

The side wall of the inner cylinder 3 is provided with a filter layer 32, and the oil-gas mixture in the first separation channel 31 flows upwards to the filter layer 32, and the filter layer 32 can separate the oil-gas mixture for the second time. At this time, the medium-particle diameter oil droplets and a part of the small-particle diameter oil droplets are separated. A second separation channel 18 is formed between the inner cylinder 3 and the shell 1, and the oil-gas mixture which is not separated enters the second separation channel 18 so as to be convenient for the subsequent third separation.

In this embodiment, as shown in fig. 2 to 10, the cooling mechanism 4 is disposed in the second separation channel 18 and is connected to the inner cylinder 3, so as to enhance the stability of the cooling mechanism 4. The oil-gas mixture flowing out of the filter layer 32 flows to the cooling mechanism 4, the cooling mechanism 4 is flushed, part of the gaseous refrigerant is condensed into liquid refrigerant, small-particle-size oil drops are dissolved in the liquid refrigerant to form a liquid mixture, and the liquid mixture drops downwards to the side wall of the inner cylinder 3 under the action of gravity. The liquid mixture exchanges heat with the hot wall surface of the inner cylinder 3, and the liquid refrigerant is heated and volatilized and the lubricating oil is not volatilized due to the difference of the boiling points of the oil and the refrigerant, so that the lubricating oil is left, and the third separation is realized. At this time, the minute oil droplets are separated. The separated lubricating oil is discharged through the oil outlet 15, and the separated refrigerant gas is discharged through the air outlet 16.

According to the oil separation device, through a multistage separation and cooling mechanism, the separation efficiency of an oil-gas mixture is effectively improved, refrigerant gas is guaranteed to be discharged sufficiently pure for use by a condenser and an evaporator, and stable operation of refrigeration equipment is guaranteed.

In some exemplary embodiments, as shown in fig. 2-6, the first diversion channel 213 includes a plurality of airflow channels 2131 and a plurality of first oil channels 2132, the plurality of airflow channels 2131 are sequentially arranged along the circumference of the first pipe 21, the airflow channels 2131 are configured to convey the oil-gas mixture after the first separation, and the airflow channels 2131 are rectangular and penetrate through the side wall of the first pipe 21, so as to ensure that the oil-gas mixture can smoothly pass through the airflow channels 2131 after the first separation and continue the subsequent separation or treatment process, and meanwhile, the rectangular airflow channels 2131 provide enough circulation space, have hydrodynamic properties and mechanical strength, reduce flow resistance, and improve separation efficiency.

A plurality of first oil passages 2132 are located at the first outlet end 212 of the first pipe 21, the plurality of first oil passages 2132 being arranged in the circumferential direction of the first pipe 21, the first oil passages 2132 being arranged to convey lubricating oil after a first separation. The first oil passage 2132 is notched at the edge of the first outlet end 212 and penetrates the sidewall of the first pipe 21, so that the lubricating oil slides along the inside of the first pipe 21 and flows along the first oil passage 2132. The air flow passages 2131 and the first oil passages 2132 are not in communication to avoid interference with each other, ensure stability and reliability of the separation process, and reduce the risk of separation failure due to unsmooth flow or re-entrainment of the oil-gas mixture.

By reasonably arranging the air flow channel 2131 and the first oil channel 2132, efficient separation of the oil-gas mixture is realized, lubricating oil can rapidly slide down and be discharged through the first oil channel 2132, and the oil-gas mixture continues to flow through the air flow channel 2131, so that energy loss and time consumption in the separation process are reduced.

In the present embodiment, as shown in fig. 2 to 6, the circumferential outer side wall of the first duct 21 is provided with a plurality of baffle plates 23, and the baffle plates 23 are provided at the edges of the air flow passages 2131. Wherein, the baffle 23 and the first pipeline 21 form a preset angle. The first pipe 21 has a plurality of element wires, wherein one element wire is connected to the baffle 23, and a preset angle α is formed between the element wire and the baffle 23, for example, 30 ° -60 °, for realizing drainage, and guiding the oil-gas mixture in the airflow channel 2131 to flow along the baffle 23, so that the oil-gas mixture can obliquely impact to the inner sidewall of the inner cylinder 3 at a certain angle, and generate a rotational flow along the inner sidewall of the inner cylinder 3, thereby completing further impact and centrifugation and fully separating large-particle-size oil drops. Meanwhile, the flow direction of the oil-gas mixture is changed by introducing the guide plate 23, the distribution of the flow field is optimized, so that the flow in the inner cylinder 3 is more uniform, the generation of vortex and dead zone is reduced, and the separation effect is further improved.

Since the baffles 23 are able to direct the flow of the oil and gas mixture in a stable manner, they also help to enhance the stability of the overall oil and gas separation device, reducing the risk of separation failure or equipment damage due to flow instability.

In this embodiment, as shown in fig. 2-6, the peripheral outer side wall of the first pipe 21 is provided with a baffle 24, and the baffle 24 is disposed on one side of the air flow channel 2131 near the first inlet end 211, i.e. when the air-fuel mixture flows out of the air flow channel 2131, the baffle 24 can generate obstruction to prevent further flow of the air-fuel mixture, and the flow rate is reduced. By slowing down the flow rate of the oil and gas mixture, the baffle 24 provides more thorough mixing and preparation time of the oil and gas mixture before entering the filter layer 32 of the first separation channel 31, which helps to more effectively separate oil droplets during the subsequent separation process, thereby improving overall separation efficiency.

Wherein, a first preset interval is arranged between the baffle 24 and the inner cylinder 3 to ensure the smoothness of the first separation channel 31, so that the problem of flow blockage caused by too small interval is avoided. After the oil-gas mixture is decelerated by the baffle plate 24, the buoyancy force is reduced, and large-particle-size oil drops entrained in the oil-gas mixture and part of medium-particle-size oil drops are further settled and separated under the action of gravity. The settled oil-gas mixture contains medium-particle-diameter oil droplets and small-particle-diameter oil droplets, and flows to the upper part of the first separation channel 31, and flows to the filter layer 32 at a low flow rate.

The introduction of the baffle 24 not only changes the flow velocity of the oil-gas mixture, but also has a certain influence on the flow direction thereof, which helps to optimize the flow field distribution so that the flow of the oil-gas mixture in the first separation channel 31 is more uniform and stable.

The baffle 24 is also useful in reducing equipment vibration and noise problems due to too high a flow rate, enhancing the stability of the overall oil and gas separator device and extending its useful life, as it is effective in reducing the flow rate of the oil and gas mixture.

The first preset distance between the baffle 24 and the inner barrel 3 can be adjusted according to actual needs, so that the oil-gas separation device can adapt to the oil-gas mixture treatment requirements of different flow rates and pressures, and the universality and the flexibility of the oil-gas separation device are improved.

In the present embodiment, as shown in fig. 2 to 6, the first sealing plate 22 includes a flat plate 221, a first annular plate 222, and a second annular plate 223, and the flat plate 221 is connected to the second annular plate 223 through the first annular plate 222. The first ring plate 222 is obliquely arranged relative to the flat plate 221 and the second ring plate 223, that is, the first ring plate 222 has an oblique annular surface, and the lubricating oil flowing out of the first oil channel 2132 can smoothly flow along the oblique annular surface of the first ring plate 222, so that the accumulation of the lubricating oil is realized, the dispersion and the loss of the lubricating oil are avoided, the concentrated collection can be performed subsequently, and the collection efficiency of the lubricating oil is improved.

The plate 221 is connected to the first outlet end 212 of the first pipe 21 to block the first outlet end 212, so as to ensure that the oil-gas mixture entering the first pipe 21 can collide with the plate 221 to promote oil-gas separation.

The second annular plate 223 is connected to the inner cylinder 3 to seal off the inner cylinder 3, ensuring that lubrication oil can accumulate further above the second annular plate 223. The second ring plate 223 is provided with a plurality of first oil passing holes 2231, the first oil passing holes 2231 are communicated with the accommodating space 11 of the housing 1, and lubricating oil can flow into the accommodating space 11 of the housing 1 along the first oil passing holes 2231. The lower cover 13 of the shell 1 is semicircular, the oil outlet 15 is positioned on the central axis of the lower cover 13, and lubricating oil can be accumulated along the semicircular shape of the lower cover 13 after flowing into the accommodating space 11, so that the collection flow of the lubricating oil is simplified, and the operation difficulty is reduced. When the accumulation amount reaches a certain degree, the oil outlet 15 can be conveniently opened for collection treatment, so that the working efficiency is improved.

In some exemplary embodiments, as shown in fig. 2 to 9, the inner cylinder 3 includes a first cylinder 33 and a second cylinder 34, and the first cylinder 33 and the second cylinder 34 are closely connected in an axial direction to form a single body. The first cylinder 33 is connected with the first pipeline 21, the second cylinder 34 is connected with the first sealing plate 22, and one end of the first cylinder 33 is connected with the first pipeline 21, so that the oil-gas mixture can smoothly enter the inner cylinder 3 (namely the first separation channel 31) for treatment. The space formed between the first cylinder 33 and the first pipe 21 and the space formed between the second cylinder 34 and the first pipe 21 together form the first separation channel 31, and the other end of the second cylinder 34 is connected with the first sealing plate 22, so as to perform the functions of sealing and guiding.

The filter layer 32 is provided on the side wall of the first cylinder 33, and the oil-gas mixture from the air flow passage 2131 impinges on the second cylinder 34 and flows onto the filter layer 32 of the first cylinder 33.

In the present embodiment, as shown in fig. 2 to 9, the first cylinder 33 includes a second sealing plate 331 and a first ring cylinder 332. Wherein the first collar 332 is the carrier of the filter layer 32. Illustratively, the first ring cylinder 332 is provided with an avoidance opening, and the filter layer 32 includes a filter screen body embedded in the avoidance opening, so that the filter screen body can be easily assembled and disassembled, thereby greatly facilitating subsequent cleaning or replacement work.

Or the filter layer 32 and the first ring cylinder 332 are integrally formed, so that the risk of falling off of the filter layer 32 due to impact is avoided, and the overall structural strength is improved. Illustratively, the filter screen body is woven from a cylindrical stainless steel wire mesh having a certain thickness, and has a plurality of pores, and oil drops filtered inside the filter screen body may accumulate and fall to flow onto the second cylinder 34.

The medium-particle-diameter oil drops and part of small-particle-diameter oil drops in the oil-gas mixture in the filter screen body are captured, and then gradually accumulate into large-particle-diameter oil drops, the accumulated large-particle-diameter oil drops flow downwards under the action of gravity and finally flow onto the second cylinder 34, and the second separation of the oil-gas mixture is realized.

The second sealing plate 331 is disposed on a side of the first ring cylinder 332 away from the second cylinder 34 to seal off one end of the first separation channel 31, and the second sealing plate 331 is connected to the first pipe 21 so as to achieve stability of the inner cylinder 3. The second sealing plate 331 is welded to the first pipe 21, for example, to improve reliability of connection.

Illustratively, the second sealing plate 331 includes a plate body 3311, an inner flange 3312 and an outer flange 3313, the plate body 3311 is ring-shaped, the inner flange 3312 is connected to the inner ring of the plate body 3311, the outer flange 3313 is connected to the outer ring of the plate body 3311, and the second sealing plate 331 is sleeved on the first pipe 21.

Wherein, the inner flange 3312 can be connected with the outer side wall of the first pipe 21, and the inner flange 3312 can increase the connection area between the second sealing plate 331 and the first pipe 21, thereby improving the reliability in connection.

The outer flange 3313 is sleeved at one end of the second cylinder 34, which not only plays a role in positioning connection and prevents gaps between the second cylinder 34 and the second sealing plate 331 caused by dislocation, but also further increases the connection area with the second sealing plate 331 and ensures the stability of the second cylinder 34.

Through the cooperation of filter layer 32 and first separation channel 31, this embodiment can high-efficiently catch the oil drop in the oil gas mixture, realizes the effective separation of oil gas mixture, has improved separation treatment efficiency.

In this embodiment, as shown in fig. 2-9, the second cylinder 34 includes a second ring cylinder 341 and a supporting ring plate 342, where the second ring cylinder 341 is connected with the first sealing plate 22 in a welding manner, so that the sealing device is not only stable and reliable, but also can effectively prevent the oil-gas mixture from leaking, and ensure the tightness of the oil-gas separation device. And the space formed by the second ring cylinder 341, the first sealing plate 22 and the first pipeline 21 is equivalent to an oil collecting space, and is used for collecting the lubricating oil separated from the filter layer 32, so that subsequent recovery treatment is facilitated.

A support ring plate 342 is connected to the radially inner wall side of the second ring cylinder 341, the support ring plate 342 serving to support the first ring cylinder 332. And the oil droplets separated by the filter layer 32 can flow onto the support ring plate 342 based on gravity to accumulate. Wherein, the ring diameter size of the supporting ring plate 342 is greater than or equal to the wall thickness size of the first ring cylinder 332, so as to ensure that oil drops in the filter layer 32 can flow onto the supporting ring plate 342, thereby realizing collection.

In addition, the support ring plate 342 is designed in consideration of accumulation and discharge of oil droplets to ensure that the oil droplets separated from the filter layer 32 smoothly flow onto the support ring plate 342, thereby achieving effective collection. On the support ring plate 342, a plurality of second oil passing holes 3421 are provided, and the second oil passing holes 3421 allow the lubricating oil on the support ring plate 342 to drop onto the second ring plate 223 of the first sealing plate 22 and enter the housing 1 through the first oil passing holes 2231 in the second ring plate 223 for concentrated collection and treatment. The design not only simplifies the collection process of oil drops, but also improves the overall cleanliness of the device.

The support ring 342 has a second predetermined interval with the first duct 21 to ensure the smoothness of the first separation channel 31. Wherein, the support ring plate 342 is located the top of baffle 24, and the support ring plate 342 is connected with the second barrel 34, and the baffle 24 is connected with first pipeline 21 for the baffle 24 is located opposite side and stagger the setting from top to bottom with the support ring plate 342, and this kind of design makes first separation channel 31 be constructed into a 'Z' style of calligraphy passageway shape, and the oil gas mixture can pass through the dual hindrance of baffle 24 and support ring plate 342 when passing, realizes impact inner wall, centrifugal rotation and slows down effect such as velocity of flow, can separate out the oil droplet more effectively.

In this embodiment, by optimizing the structural design of the second cylinder 34, the oil-gas separation efficiency and the overall performance of the oil-gas separation device are significantly improved, and meanwhile, the stability and the maintenance convenience of the oil-gas separation device are enhanced. And by means of the support ring plate 342 and the baffle plate 24, and their relative positional relationship with the first pipe 21 and the second cylinder 34, the present embodiment successfully constructs a highly efficient first separation channel 31 in the shape of a 'Z' -shaped channel, which allows for more efficient separation of oil and gas mixtures as they pass through.

In some exemplary embodiments, as shown in fig. 2-10, the cooling mechanism 4 includes a helical duct 41 that is wrapped around the radially outer sidewall of the inner barrel 3, such as around the first barrel 33 of the inner barrel 3, so as to be disposed in correspondence with the filter layer 32, receiving the oil-gas mixture flowing out of the filter layer 32 without being separated.

The screw duct 41 has a second inlet end 42 and a second outlet end 43, and the second inlet end 42 and the second outlet end 43 are each passed out of the casing 1 so as to communicate with external devices such as the second inlet end 42 and the second outlet end 43, respectively, thereby realizing the circulation flow of the refrigerant. The spiral pipeline is arranged to accommodate the refrigerant so as to facilitate condensing the gaseous refrigerant in the oil-gas mixture into the liquid refrigerant.

When the oil-gas mixture is filtered and separated by the filter layer 32, it still contains a small amount of small-particle-size oil droplets or fine-particle-size oil droplets, which are difficult to effectively remove in the conventional separation process. In the present embodiment, the cryogenic medium (i.e., refrigerant) in the spiral pipe 41 plays a key role. Since the wall temperature of the spiral pipe 41 is set to be lower than the condensation temperature corresponding to the gaseous refrigerant in the oil-gas mixture, when the oil-gas mixture flows through the spiral pipe 41, part of the gaseous refrigerant is condensed into liquid refrigerant, and a condensate liquid column is formed in the circumferential direction of the spiral pipe 41, like a rain curtain. The liquid columns are kept at a certain interval, and when the oil-gas mixture passes through the liquid rain curtains, due to the mutual solubility between the oil and the liquid refrigerant, small-particle-size oil drops and tiny-particle-size oil drops which are difficult to separate can be dissolved in the condensate to form a liquid mixture and drop downwards together.

These liquid mixtures flow to the second barrel 34 of the inner barrel 3 where they are heated to effect a third separation. In this process, the high-temperature and high-pressure oil-gas mixture from the gas flow passage 2131 may strike the second cylinder 34, causing its temperature to rise, forming a hot wall. Because the boiling points of the lubricating oil and the liquid refrigerant are different, when the liquid mixture meets such a hot wall surface, the liquid refrigerant can be heated and volatilized, and the lubricating oil cannot volatilize. Therefore, the lubricating oil is successfully left, and the small-particle-size oil drops and the tiny-particle-size oil drops are deeply separated through the combination with the liquid refrigerant and the volatilization process, namely, the third separation is completed.

The present embodiment achieves deep separation of small-particle diameter oil droplets and minute-particle diameter oil droplets by the design of the spiral duct 41 that is introduced into the cooling mechanism 4. The separation mode not only improves the separation efficiency of the oil-gas separation device, but also ensures that the discharged gas is cleaner. And the heat exchange process between the spiral pipeline 41 and the second cylinder 34 of the inner cylinder 3 is skillfully utilized, so that the condensation and volatilization of the refrigerant are realized, and the heat energy of the high-temperature high-pressure oil-gas mixture is utilized. The design not only improves the energy utilization efficiency, but also reduces the running cost of the equipment.

In this embodiment, as shown in fig. 2 to 11, the oil separating apparatus includes a sump 5, the sump 5 being disposed in the second separation passage 18, the sump 5 forming a tight connection with the housing 1 and the inner tube 3, respectively. Wherein the oil sump 5 is used for collecting the lubricating oil separated out for the third time.

Illustratively, the oil sump 5 includes a first flange 51, a third annular plate 52 and a second flange 53 which are sequentially connected, the first flange 51 is connected with the housing 1, the second flange 53 is connected with the second cylinder 34 of the inner cylinder 3, and the third annular plate 52 is obliquely arranged relative to the first flange 51 and the second flange 53, so that the volume of the oil sump 5 is effectively reduced, the whole device is more compact, lubricating oil is conveniently collected, and the liquid mixture in the oil sump 5 is tightly adhered to the second cylinder 34 of the inner cylinder 3. In this way, when the second cylinder 34 heats the liquid mixture in the oil sump 5 as a hot wall, the liquid refrigerant can volatilize faster, leaving pure lubricating oil behind.

The second flange 53 is provided with a plurality of third oil passing holes 531, and the third oil passing holes 531 are communicated with the casing 1, so that lubricating oil in the oil collecting groove 5 can flow to the lower cover 13 of the casing 1, and then is discharged out of the oil outlet 15, the collection process of the lubricating oil is simplified, and the separation efficiency of the whole device is improved.

In addition, in order to prevent the problem that the lubricating oil cannot smoothly flow into the housing 1 due to the excessively high pressure in the oil collecting tank 5, the first folded edge 51 is further provided with a plurality of balance holes 511, and the balance holes 511 can enable the upper space and the lower space of the oil collecting tank 5 to be at the same pressure, so that the lubricating oil can be ensured to smoothly drop into the housing 1 under the action of gravity, the stability and the reliability of the device are improved, and the maintenance process is further simplified.

According to the embodiment, through optimizing the structural design of the oil collecting groove 5, the separation efficiency of the oil-gas separation device is successfully improved, the collection process is simplified, the stability is enhanced, the structural design is optimized, and the oil collecting groove 5 enables the liquid mixture to be heated by the hot wall surface more quickly, so that the quick volatilization of the liquid refrigerant and the separation of lubricating oil are realized. The third oil passing hole 531 on the second flange 53 is designed so that the lubricating oil can smoothly flow to the lower cover 13 of the housing 1 and finally be discharged through the oil outlet 15, thereby simplifying the collection process and improving the automation degree of the whole device. The balance hole 511 on the first flange 51 effectively prevents problems caused by excessive pressure in the oil sump 5, ensures smooth discharge of lubricating oil, improves stability of the device, and reduces failure rate.

The application also provides refrigeration equipment with high-efficiency refrigeration performance. The refrigeration apparatus includes an evaporator, a condenser, an apparatus body, and an oil separating device as in any of the above embodiments, the oil separating device being connected to the apparatus body. The oil separation device ensures efficient separation and recovery of the lubricating oil, thereby improving the stability and efficiency of the whole refrigeration system.

The main body of the refrigerating equipment is used as a main body structure of the refrigerating equipment and is used for bearing the evaporator, the condenser, the oil separating device and other key components. The design fully considers the operation requirement of the refrigeration equipment, and ensures the close fit and high-efficiency cooperation among all components.

During operation of the refrigeration device, the refrigerant absorbs heat in the evaporator and converts to a gaseous state, and then enters the oil separation device after being compressed by the compressor. In the oil separator, the lubricating oil is efficiently separated from the refrigerant, the lubricating oil is recovered and re-injected into the compressor, and the refrigerant continues to enter the condenser for condensation. The condensed refrigerant enters the evaporator again to evaporate, thereby forming a complete refrigeration cycle.

Through optimizing the design of oil separation device, the embodiment refrigeration equipment realizes the efficient separation and recovery of lubricating oil, thereby reducing the lubricating oil content in the compressor and improving the purity of the refrigerant. This helps to reduce the energy consumption and wear of the compressor, thereby improving the refrigeration efficiency of the entire refrigeration apparatus.

The efficient separation capacity of the oil separation device ensures an adequate supply of lubricant in the compressor, thereby avoiding compressor failures due to lubricant starvation. This helps to extend the life of the compressor and improves the stability of the overall refrigeration system.

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" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "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. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

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.

The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

1. An oil separator, comprising:

A housing;

The separation mechanism comprises a first pipeline and a first sealing plate, wherein the first pipeline is provided with a first inlet end and a first outlet end, a first diversion channel is arranged on the side wall of the first pipeline close to the first outlet end, the first inlet end penetrates out of the shell, and the first sealing plate is arranged at the first outlet end;

an inner cylinder arranged in the shell and sleeved outside the separating mechanism, a first separating channel is formed between the inner cylinder and the first pipeline, and a second separating channel is formed between the inner cylinder and the shell, wherein the side wall of the inner cylinder is provided with a filter layer which is used for separating the oil-gas mixture flowing out through the first diversion channel for the second time, and

The cooling mechanism is arranged in the second separation channel and is connected with the inner cylinder, wherein the oil-gas mixture flowing out of the filter layer flows through the cooling mechanism to be condensed into a liquid mixture, and the liquid mixture flows to the side wall of the inner cylinder positioned in the second separation channel and is heated to finish the third separation.

2. The oil separator according to claim 1, wherein the first flow-guiding passage comprises a plurality of air flow passages and a plurality of first oil passages, the plurality of air flow passages being arranged in sequence along a circumference of the first pipe and penetrating a sidewall of the first pipe, the air flow passages being arranged to convey the oil-gas mixture subjected to the first separation;

A plurality of first oil passages are positioned at the first outlet end of the first pipeline, are distributed along the circumferential direction of the first pipeline and penetrate through the side wall of the first pipeline, and are arranged to convey lubricating oil subjected to first separation;

wherein the air flow passage and the first oil passage are not in communication.

3. The oil separator according to claim 2, wherein a circumferential outer side wall of the first duct is provided with a plurality of baffle plates, which are provided at edges of the airflow passage;

wherein, the guide plate is a preset angle with the first pipeline.

4. The oil separator according to claim 2, wherein a baffle is provided on a circumferential outer side wall of the first duct, the baffle being provided on a side of the air flow passage near the first inlet end, wherein a first preset distance is provided between the baffle and the inner cylinder.

5. The oil separator according to claim 1, wherein the first seal plate includes a flat plate, a first annular plate, and a second annular plate, the flat plate being connected to the second annular plate through the first annular plate, the second annular plate being provided with a plurality of first oil passing holes;

The first annular plate is obliquely arranged relative to the flat plate and the second annular plate respectively, the flat plate is connected with the first outlet end of the first pipeline so as to block the first outlet end, and the second annular plate is connected with the inner cylinder.

6. The oil separator according to claim 1, wherein the inner tube comprises a first tube and a second tube, the first tube is connected to the first pipe, the second tube is connected to the first seal plate, and the filter layer is provided on a side wall of the first tube.

7. The oil separator according to claim 6, wherein the first cylinder includes a second sealing plate and a first ring cylinder, the second sealing plate being disposed on a side of the first ring cylinder away from the second cylinder to seal off the first separation channel, the second sealing plate being connected to the first duct.

8. The oil separator according to claim 7, wherein the filter layer includes a filter screen body, and the first ring cylinder is provided with a relief opening to embed the filter screen body.

9. The oil separator of claim 7, wherein the second cylinder comprises a second ring cylinder and a support ring plate, the second ring cylinder being connected to the first seal plate;

the support ring plate is connected with the radial inner wall side of the second ring cylinder and is used for supporting the first ring cylinder, a second preset distance is reserved between the support ring plate and the first pipeline, and a plurality of second oil passing holes are formed in the support ring plate.

10. The oil separator according to claim 9, wherein the support ring plate has a ring diameter dimension greater than or equal to a wall thickness dimension of the first ring cartridge.

11. The oil separator according to claim 1, wherein the cooling mechanism includes a spiral pipe which is wound around a radially outer side wall of the inner cylinder and is provided in correspondence with the filter layer;

the spiral pipeline is provided with a second inlet end and a second outlet end, and the second inlet end and the second outlet end penetrate out of the shell, wherein the spiral pipeline is arranged to accommodate a refrigerant.

12. The oil separator according to claim 1, comprising an oil sump disposed in the second separation channel, the oil sump being connected to the housing and the inner barrel, respectively.

13. The oil separator according to claim 12, wherein the oil sump comprises a first flange, a third annular plate and a second flange which are connected in sequence, the third annular plate is arranged obliquely relative to the first flange and the second flange, respectively, the first flange is connected with the housing, and the second flange is connected with the inner cylinder;

wherein, the second flange is provided with a plurality of third oil holes.

14. The oil separator according to claim 13, wherein the first flange is provided with a plurality of balance holes.

15. The oil separator according to claim 1, wherein the housing is provided with an oil outlet and an air outlet on both sides in the axial direction thereof, respectively, wherein the air outlet is located on the same side as the first inlet end.

16. Refrigeration apparatus comprising an apparatus body and an oil separation device according to any one of claims 1 to 15, wherein the oil separation device is connected to the apparatus body.