CN217440293U

CN217440293U - Oil-gas separation structure, compressor and refrigerating and heating system

Info

Publication number: CN217440293U
Application number: CN202221330982.7U
Authority: CN
Inventors: 窦青
Original assignee: Maanshan Deshan Metal Forming Technology Co ltd
Current assignee: Maanshan Deshan Metal Forming Technology Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-09-16
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses an oil-gas separation structure, a compressor and a refrigeration and heating system, which belong to the technical field of compressors, and comprise a gas-liquid separation cavity and a clearance oil discharge structure, wherein the clearance oil discharge structure comprises a mandrel and a mandrel mounting seat in clearance fit with the mandrel; the first oil passing channel guides oil to the gap oil discharging structure; the oil passing channel II is used for communicating the gap oil discharging structure with the oil pool; the first oil passing channel and the second oil passing channel are distributed with the mandrel in a staggered manner so that the mandrel can be limited in an inner hole of the mandrel mounting seat; the oil-gas separation structure of the utility model utilizes the pressure difference and the gap oil discharge, can separate the lubricating oil from the refrigerant, prevent the lubricating oil from entering the refrigeration system to influence the refrigeration effect, and can lead the lubricating oil to flow back to the compressor oil storage pool; still be provided with the elementary structure of worrying of magnetic adsorption, the metal piece in the lubricating oil of can adsorbing effectively prevents that clearance oil extraction structure from blockking up.

Description

Oil-gas separation structure, compressor and refrigerating and heating system

Technical Field

The utility model relates to a compressor technical field, in particular to oil-gas separation structure, compressor and refrigeration system of heating.

Background

The compressor is used as a heart part in the temperature regulation system, and the working efficiency of the compressor directly determines the energy utilization efficiency of the whole temperature regulation system. Wherein the inability of the lubricating oil mixed in the compressed refrigerant to be effectively separated from the refrigerant prior to entering the temperature regulation system will have a direct impact on the system. The general rotor compressor on the market at present generally adopts a high back pressure structure, namely a compressor pump body is always positioned in a high-pressure shell in the working process, meanwhile, a compressed refrigerant and part of lubricating oil are compressed by the compressor pump body and then are discharged into the high-pressure shell together, the refrigerant and the lubricating oil are separated by the sedimentation effect in the high-pressure shell, finally, the refrigerant is discharged through a high-pressure exhaust port and enters a temperature regulating system to participate in refrigeration cycle, and the lubricating oil flows back to an oil pool at the lower part of the compressor after sedimentation to participate in pump body lubrication again; the mode has obvious beneficial effects on the compressor with a high back structure, but the lubricating oil mixed in the high-temperature and high-pressure refrigeration after being compressed by the pump body can not be effectively separated and sent back to the oil pool for the low back pressure compressor by the method, so that an oil-gas separation structure for separating the lubricating oil more effectively needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve one of the technical problem that exists among the background art at least. Therefore, the utility model provides an oil-gas separation structure utilizes pressure differential and fit clearance, and effectual with under the exhaust side high temperature high pressure environment and subside the lubricating oil of branch out, arrange into and set up in the oil bath of the low temperature low pressure of compressor bottom, fall to minimum with the possibility that lubricating oil got into the temperature regulation system.

A gas-liquid separation structure, includes the gas-liquid separation chamber, still includes:

the clearance oil discharging structure comprises a mandrel and a mandrel mounting seat matched with the mandrel, and a clearance channel is formed between the mandrel and the mandrel mounting seat;

an inlet of the oil passing channel I is communicated with the gas-liquid separation cavity, and oil is guided from the gas-liquid separation cavity to an inlet of the clearance channel;

the oil passing channel II is used for communicating the outlet of the clearance channel with the oil pool and guiding the oil from the outlet of the clearance channel to the oil pool;

and the oil in the gas-liquid separation cavity sequentially passes through the oil passage I, the gap passage and the oil passage II and is discharged to the oil pool.

The mandrel mounting seat is provided with an inner hole, the mandrel is assembled in the inner hole of the mandrel mounting seat, and the oil passing channel I and the oil passing channel II are distributed with the mandrel in a staggered mode so that the mandrel can be limited in the inner hole.

Still include filtration, gas-liquid separation intracavity is equipped with exhaust hole and oil drain hole, filtration sets up in the oil drain hole or set up the oil drain hole with cross between the oil passage one, cross the entry of oil passage one with filtration's export intercommunication.

The width of the gap channel is 0.001mm-0.020 mm.

The filtering structure is a filtering core, a magnetic block is arranged on the filtering core, and the filtering pores of the filtering core are smaller than 0.005 mm.

The magnetic block is T-shaped, cylindrical or inverted concave.

The utility model also provides a compressor, including above-mentioned oil-gas separation structure, lubricating oil has in the gas-liquid separation intracavity, lubricating oil passes through oil passage one, clearance passageway, oil passage two, discharge extremely outside the gas-liquid separation chamber.

The compressor includes:

a compressor housing having a drive assembly disposed therein;

the air cylinder is arranged in the compressor shell, a compression cavity is arranged in the air cylinder, and the gas-liquid separation cavity is formed in the air cylinder and communicated with the compression cavity;

and the piston is arranged in the compression cavity, is in transmission connection with the driving assembly and rotates in the compression cavity under the driving of the driving assembly.

The compressor further includes:

the auxiliary bearing is arranged in the compressor shell, the first oil passing channel is arranged on the auxiliary bearing, and a hole matched with the gap oil discharging structure is formed in the auxiliary bearing;

and the silencing cover is positioned on the lower side of the auxiliary bearing, and the oil passing channel II is arranged on the silencing cover.

The air cylinder comprises a cylinder body outer wall and a cylinder body inner wall, the compression cavity is formed in the cylinder body inner wall, and the gas-liquid separation cavity is positioned between the cylinder body outer wall and the cylinder body inner wall;

the gas-liquid separation cavity is communicated with the main exhaust hole and the main air inlet hole;

the inner wall of the cylinder body is provided with an air suction port, and air enters the compression cavity through the main air inlet, the gas-liquid separation cavity and the air suction port in sequence;

and an exhaust port is formed in the inner wall of the cylinder body, and gas compressed by the piston in the compression cavity enters the gas-liquid separation cavity through the exhaust port and is exhausted out of the cylinder through the gas-liquid separation cavity from the main exhaust port.

The main exhaust hole and the main air inlet hole are both arranged on the air cylinder or both arranged on an upper bearing and a lower bearing which are respectively positioned on the upper side and the lower side of the air cylinder.

The gas-liquid separation chamber comprises a plurality of cavities with silencing and buffering functions, adjacent cavities are separated through separating reinforcing ribs arranged between the outer wall of the cylinder body and the inner wall of the cylinder body, the separating reinforcing ribs, the inner side of the outer wall of the cylinder body and the outer side of the inner wall of the cylinder body form the cavities in a surrounding mode, and channels enabling the adjacent cavities to be communicated are arranged on the separating reinforcing ribs.

One part of the cavity forms a suction side cavity, the other part of the cavity forms an exhaust side cavity, the suction side cavity is communicated with a main air inlet hole, the exhaust side cavity is communicated with a main exhaust hole, gas enters from the main air inlet hole, flows through the suction side cavity, enters from the air suction hole into the compression cavity, is compressed by a piston, then is discharged from the exhaust hole, flows through the exhaust side cavity, and then is discharged from the main exhaust hole.

And a high-low pressure separation part is arranged between the suction side chamber and the exhaust side chamber, and a heat insulation groove is arranged in the high-low pressure separation part.

The channel comprises an upper channel and a lower channel, the upper channel is relatively close to the top end of the separation reinforcing rib or is arranged at the top end of the separation reinforcing rib, the lower channel is arranged at the bottom end of the separation reinforcing rib, and gas-liquid separation is realized at a distance between the upper channel and the lower channel, so that the upper channel is used for circulating gas, and the lower channel is used for circulating liquid.

The cross-sectional area of the cavity is larger than the cross-sectional area of the channel and larger than the cross-sectional area of the exhaust port.

The ratio of the cross-sectional area of the cavity to the cross-sectional area of the channel is: 2.5 to 10:1, and the ratio of the cross-sectional area of the channel to the cross-sectional area of the exhaust port is 1.5 to 8: 1.

The air cylinder comprises an upper air cylinder and a lower air cylinder which can be mutually connected, the upper air cylinder comprises an upper cylinder body outer wall and an upper cylinder body inner wall, the lower air cylinder comprises a lower cylinder body outer wall and a lower cylinder body inner wall, the upper cylinder body outer wall and the lower cylinder body outer wall jointly form the cylinder body outer wall, and the upper cylinder body inner wall and the lower cylinder body inner wall jointly form the cylinder body inner wall;

the air suction side chamber comprises an upper air suction side chamber and a lower air suction side chamber which are communicated with each other, the air exhaust side chamber comprises an upper air exhaust side chamber and a lower air exhaust side chamber which are communicated with each other, the upper air suction side chamber and the upper air exhaust side chamber are arranged between the outer wall of the upper cylinder body and the inner wall of the upper cylinder body, and the lower air suction side chamber and the lower air exhaust side chamber are arranged between the outer wall of the lower cylinder body and the inner wall of the lower cylinder body;

and gas enters from the main air inlet, flows through the upper air suction side cavity and the lower air suction side cavity, enters the inner wall of the cylinder body from the air suction port, is compressed and then discharged from the air exhaust port, flows through the upper air exhaust side cavity and the lower air exhaust side cavity, and then is sent to the main exhaust hole.

The outer wall of the cylinder body is of a structure with a concave middle part and a convex periphery.

The oil sump is arranged in the compressor shell and is located below the cylinder, and the compressor further comprises an oil supply device which is connected with the oil sump and used for conveying oil in the oil sump to the cylinder.

The oil supply device is also provided in the compressor housing and located below the cylinder.

The utility model also provides a refrigeration/heating system, including foretell compressor, still include evaporimeter and condenser, there is the refrigerant circulation flow between compressor, evaporimeter, the condenser.

The refrigerant is a carbon dioxide refrigerant.

Compared with the prior art, the beneficial effects of the utility model are that: the oil-gas separation structure of the utility model utilizes the pressure difference and the gap oil discharge, can separate the lubricating oil from the refrigerant, prevent the lubricating oil from entering the refrigeration system to influence the refrigeration effect, and can lead the lubricating oil to flow back to the oil pool;

the magnetic adsorption primary filtering structure is arranged, so that metal debris in lubricating oil can be adsorbed, the metal debris is effectively prevented from blocking the filter element, the filtering effect is improved, and the gap oil discharging structure is also effectively prevented from being blocked;

the oil-gas separation structure can independently realize filtering and oil discharging functions and can effectively prevent the high-pressure and low-pressure gas leakage of the compressor, and can be fixedly arranged among the cylinder, the auxiliary bearing and the silencing cover in an embodiment mode, and can also be arranged on a crankshaft shell, a compressor shell and an exhaust pipeline in other assembly modes;

the utility model provides a clearance oil discharge mechanism will pass through the dabber mount pad of hole (for example, hinge purlin grinding) and the dabber of accurate grinding excircle through the precision finishing, after measuring the size and the optional required clearance of joining in marriage, pack into the compressor in the lump, compare the oil discharge structure among the prior art, can combine the compressor of different merit condition and the demand of the lubricating oil that corresponds, this oil discharge clearance of artificial control is in order to satisfy the messenger demand when assembling the compressor.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a partial enlarged view of the oil discharge structure of the present invention;

FIG. 3 is a schematic structural view of the gas-liquid separation chamber of the present invention;

fig. 4 is a schematic structural view of the gap oil discharge structure of the present invention;

fig. 5 is a schematic structural diagram of the cylinder body of the present invention.

FIG. 6 is a schematic view of the structure of the channel and the reinforcing rib of the present invention

Description of reference numerals:

1-gas-liquid separation cavity, 2-oil discharge hole, 3-mandrel, 4-mandrel mounting seat, 5-oil passage I, 6-oil passage II, 7-oil pool, 8-filter element, 9-magnetic block, 11-compressor shell, 12-cylinder, 121-cylinder inner wall, 122-cylinder outer wall, 13-auxiliary bearing, 14-silencing cover, 15-driving component, 21-compression cavity, 22-exhaust hole, 23-total exhaust hole, 24-total air inlet hole, 25-air inlet hole, 26-cavity, 27-separation reinforcing rib, 28-channel, 281-upper channel, 282-lower channel, 29-heat insulation groove, 31-air suction side cavity and 32-air discharge side cavity.

Detailed Description

In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.

Example one

As shown in fig. 1 to 4, the utility model provides an oil-gas separation structure, which is arranged on an exhaust passage of a compressor and used for separating refrigerant and lubricating oil in the compressor, and at least comprises a gas-liquid separation cavity 1, an oil passage I5, a gap oil discharge structure and an oil passage II 6;

an inlet of the oil passing channel I5 is communicated with the gas-liquid separation cavity 1, and oil is guided from the gas-liquid separation cavity 1 to an inlet of the gap channel;

the oil passing channel II 6 is used for communicating the outlet of the gap channel with the oil pool 7 and guiding oil from the outlet of the gap channel to the oil pool 7;

the gas-liquid separation chamber 1 is used for separating refrigerant and lubricating oil, and as shown in fig. 3, the gas-liquid separation chamber is of a partition labyrinth structure, so that the refrigerant and the lubricating oil can be separated to the maximum extent and layered by gravity;

the pressure difference between the gas-liquid separation cavity 1 and the oil pool 7 and the gap oil discharge structure can enable lubricating oil to sequentially pass through the first oil passing channel 5, the gap channel and the second oil passing channel 6 from the gas-liquid separation cavity 1 with high temperature and high pressure to enter the low-pressure oil pool 7;

the clearance oil discharge mechanism comprises a mandrel mounting seat 4 and a mandrel 3, an inner hole in clearance fit with the mandrel 3 is formed in the center of the mandrel mounting seat 4, in order to facilitate clearance oil feeding and oil discharge, the top of the inner hole is in a conical flaring shape (as shown in figure 4), the top of the inner hole is also in the conical flaring shape, the mandrel 3 is conveniently mounted in the mandrel mounting seat 4, in order to limit the mandrel 3 in the mandrel mounting seat 4 and prevent the mandrel 3 from falling off from the mandrel mounting seat 4 in the working process of the compressor, the oil passing channel I5 and the oil passing channel II 6 are distributed with the mandrel 3 in a staggered manner to form a resisting position, namely the oil passing channel I5 and the oil passing channel II 6 are not coaxial with the mandrel 3;

in the compressor industry, different refrigerants are selected according to different use conditions of temperature regulation system requirements, such as common R22 and R134a, different refrigerants need to be selected and matched with different lubricating oil and pre-packaged in a compressor shell 11, the viscosity, density, mutual solubility with the refrigerant, flowability and other characteristics of the different lubricating oil are greatly different, in order to meet the requirements, the clearance between the inner holes of the mandrel 3 and the mandrel mounting seat 4 is generally 0.001mm-0.010mm, and the embodiment takes the lubricating oil No. 68 as an example for explanation; when using No. 68 lubricating oil, the fit clearance of the inner hole of the mandrel 3 and the mandrel mounting seat 4 is 0.002mm, after confirming that the requirement is 0.002mm clearance, the mandrel mounting seat 4 of which the inner hole is ground by the hinge truss and the mandrel 3 of which the outer circle is finely ground are measured and matched to form 0.002mm clearance, and then are together loaded into a compressor (as shown in figure 2), and the oil discharge clearance can be manually controlled to meet the requirement when the compressor is assembled by combining the compressors under different working conditions and the requirements of corresponding lubricating oil;

the utility model discloses a clearance oil extraction structure is a structure that can independently realize the oil extraction function and effectively prevent the compressor from high-low pressure air leakage, and the installation position is not limited on the crankshaft shell of the compressor, the compressor shell 11, the exhaust duct, the cylinder 12, the auxiliary bearing 13, the silencing cover 14 or the temperature regulator;

the oil pool 7 is arranged in a compressor shell 11 and positioned below the cylinder 12, and the compressor further comprises an oil supply device which is connected with the oil pool 7 and is used for conveying oil in the oil pool 7 into the cylinder 12; an oil supply is also provided in the compressor housing 11 below the cylinder 12.

Example two

On the basis of the first embodiment, as shown in fig. 2, the utility model provides a filtering structure for an oil-gas separation structure, which is used for filtering impurities in lubricating oil, so that the oil circuit circulation in the gap is smoother;

an exhaust hole and an oil discharge hole 2 are arranged in the gas-liquid separation cavity 1, and the filtering structure is arranged in the oil discharge hole 2 or between the oil discharge hole 2 and the first oil passing channel 5;

the filter structure is a filter core 8, the filter core 8 is a high-density microporous filter structure, and the size of filter pores on the filter core is designed to be less than 0.005mm, so that impurities and foreign matters in the settled lubricating oil can be filtered;

the upper opening of the oil passing channel I5 is positioned at the lower opening of the filtering structure, namely the inlet of the oil passing channel I5 is communicated with the outlet of the filtering structure, so that the filtered liquid lubricating oil can be guided into the gap oil discharge structure through the filtering structure and the oil passing channel I5;

because the compressor can generate metal abrasion during working to form some metal debris which can block the gap oil discharge structure, in order to improve the filtering effect of the filtering structure, a magnetic block 9 is added on the filtering structure, when the magnetic block 9 is applied on the filter element 8, the shape of the magnetic block 9 can be a T-shaped, a cylinder or an inverted concave strong magnet, the shape is not limited in practical use and can be selected according to practical conditions such as installation space, the magnetic block 9 is arranged on the top of the filter element 8 and can adsorb metal impurities in lubricating oil to prevent the filter element 8 from being blocked by the metal impurities, in addition, because the filter element 8 has a certain length, the adsorption capacity of the magnetic block 9 arranged on the top of the filter element 8 is difficult to cover the whole filter element 8, and the metal impurities are easy to accumulate on the lower layer part of the lubricating oil, a magnetic ring (not shown in the figure) can be additionally arranged at the position where the filter element 8 is flush with the cavity bottom of the gas-liquid separation cavity 1, thus, the adsorption effect can be improved, and the service life of the filter element 8 can be prolonged;

the shape of the filter element 8 is not limited to a cylindrical shape, and may be a square cylinder or another shape having a polygonal cross section.

EXAMPLE III

The embodiment of the utility model provides a compressor, including the oil-gas separation structure in the above-mentioned embodiment;

the compressor further comprises a compressor shell 11, and a driving assembly 15, a cylinder 12, an auxiliary bearing 13, a piston and a silencing cover 14 (only parts of the compressor connected with an oil-gas separation structure are indicated here) which are arranged in the compressor shell 11, when the oil-gas separation structure is applied to the compressor, the gas-liquid separation cavity 1 can penetrate through the cylinder 12, and the top surface of the auxiliary bearing 13 is the cavity bottom of the gas-liquid separation cavity 1;

the piston is arranged in the compression cavity 21 and is in transmission connection with the driving assembly 15, and the piston rotates in the compression cavity 21 under the driving of the driving assembly 15;

the first oil passing channel 5 is formed in the auxiliary bearing 13; the second oil passing channel 6 is arranged on the silencing cover 14; the auxiliary bearing 13 is provided with a hole for accommodating the gap oil discharge structure, the auxiliary bearing 13 is hermetically connected with the contact surface of the mandrel mounting seat 4 to ensure that no air leakage exists, so that lubricating oil can be discharged from a high-pressure area into a low-pressure area by taking the hole of the gap oil discharge structure as a channel, and the high pressure and the low pressure can be ensured not to be directly communicated and communicated with each other;

as shown in fig. 3, the auxiliary bearing 13 is provided with a mounting hole (i.e., the oil discharge hole 2) engaged with the filter element 8, and the cylinder 12 is provided with an arc-shaped groove engaged with the outer surface of the filter element 8, the arc-shaped groove is used for limiting the position of the filter element 8, so that the filter element 8 is not separated from the pre-assembly position even when the compressor is inverted, tilted, and rotated.

Example four

On the basis of the third embodiment, as shown in fig. 5 and fig. 6, the utility model provides a cylinder, the cylinder 12 includes a cylinder outer wall 122 and a cylinder inner wall 121, the compression cavity 21 is formed in the cylinder inner wall 121, and the gas-liquid separation cavity 1 is located between the cylinder outer wall 122 and the cylinder inner wall 121;

wherein, the outer wall 122 of the cylinder body is provided with a mounting position and a mounting port to be assembled with other parts of the compressor, such as a crankshaft shell (main bearing) of the compressor, an auxiliary bearing 13, a silencing cover 14, an oil control system, a gaseous refrigerant system and the like; the compression cavity 21 is matched with a piston rotor/integrated rotating shaft in the compressor, and the inner wall 121 of the cylinder body is of a flexible structure;

the gas-liquid separation cavity 1 is communicated with a main exhaust hole 23 and a main air inlet hole 24;

the inner wall 121 of the cylinder body is provided with an air suction port 25, and air enters the compression cavity 21 through the main air inlet hole 24, the gas-liquid separation cavity 1 and the air suction port 25 in sequence;

an exhaust port 22 is formed in the inner wall 121 of the cylinder body, and gas compressed by the piston in the compression cavity 21 enters the gas-liquid separation cavity 1 through the exhaust port 22 and is exhausted out of the cylinder 12 from a main exhaust hole 23 through the gas-liquid separation cavity 1;

the total exhaust hole 23 and the total intake hole 24 may be provided not only on the cylinder 12 but also on an upper bearing located on the upper side of the cylinder 12 or a lower bearing located on the lower side of the cylinder 12;

the gas-liquid separation chamber 1 comprises a plurality of cavities 26 which play a role of sound attenuation and buffering, the parts of the cavities 26 are composed of flexible cylinder inner walls 121, so that the cylinder inner walls 121 can be deformed by changing the mode of the cavities 26, by providing the cylinder inner wall 121 with a somewhat flexible structure, by the design of the cavity 26 in combination with the compressor compression process, can ensure that the inner wall 121 of the cylinder body realizes slight stress following deformation under the action of external force, can ensure the sealing performance of the piston rotor/integrated rotating shaft in the compressor and the inner wall 121 of the cylinder body through flexible deformation, reduce leakage in the compression process, and reduce the occurrence of the situation that the piston rotor is blocked by the inner wall 121 of the cylinder body, meanwhile, the combination and the corresponding arrangement of the cavities 26 can also have the effects of silencing, disturbing flow and the like on the air suction and exhaust actions of the compressor, so that the noise generated during the operation of the compressor is reduced to the minimum;

a part of the cavities 26 form a suction side cavity 31, the other part of the cavities 26 form a discharge side cavity 32, two adjacent cavities 26 in the cavities 26 contained in the suction side cavity are separated by a separation reinforcing rib 27 arranged between the cylinder outer wall 122 and the cylinder inner wall 121, two adjacent cavities 26 in the cavities 26 contained in the discharge side cavity 32 are also separated by a separation reinforcing rib 27 arranged between the cylinder outer wall 122 and the cylinder inner wall 121, and a channel 28 for communicating the adjacent cavities 26 is arranged on the separation reinforcing rib 27;

the separating reinforcing rib 27 is connected with the cylinder body outer wall 122 and the cylinder body inner wall 121, so that the strength of the cylinder 12 can be improved, and the service life is prolonged;

the two groups of cavities 26 are divided into a high-pressure cavity (an exhaust side cavity 32) and a low-pressure cavity (an air suction side cavity) by the separating reinforcing ribs 27, and a heat insulation groove 29 is arranged between the high-pressure cavity and the low-pressure cavity, so that direct heat transfer between a high-pressure high-temperature area and a low-pressure low-temperature area can be effectively reduced, and overhigh air suction temperature caused directly is avoided;

the suction side chamber 31 is communicated with a main suction hole 24, the discharge side chamber 32 is communicated with the main discharge hole 23, gas enters from the main suction hole 24, flows through the suction side chamber 31, enters the compression chamber 21 from the suction hole 25, is discharged from the discharge hole 22 after being compressed by the piston, flows through the discharge side chamber 32, and then is discharged from the main discharge hole 23;

as shown in fig. 6, the channel 28 includes an upper channel 281 and a lower channel 282, the upper channel 281 is disposed relatively close to the top end of the separating reinforcing rib 27 or disposed at the top end of the separating reinforcing rib 27, the lower channel 282 is disposed at the bottom end of the separating reinforcing rib 27, and a gap existing between the upper channel 281 and the lower channel 282 realizes gas-liquid separation, so that the upper channel 281 is used for circulating gas, and the lower channel 282 is used for circulating liquid; the upper channel 281 and the lower channel 282 are respectively arranged on the separating and reinforcing rib 27, so that the lubricating oil mixed in the low-temperature gaseous refrigerant can be settled for the first time, the gas-liquid separation is realized, the energy efficiency ratio is improved, and the effect of further eliminating exhaust noise is realized; furthermore, the high-pressure cavity and the low-pressure cavity are respectively provided with an upper channel 281 and a lower channel 282, so that primary gas-liquid separation at the low-pressure side and primary gas-liquid separation at the high-pressure side are realized, and the gas-liquid separation effect is obvious;

the cavities 26, the channels 28 and the separating reinforcing ribs 27 form a labyrinth structure;

the openings at the two ends of the channel 28 are respectively arranged at the two sides of the width direction of the separating reinforcing rib 27, and it can be understood that the opening area at the two ends of the channel 28 is usually relatively smaller than the area of the cavity 26, so that the flow velocity of the fluid refrigerant is forced to change to realize the disturbance of the flow direction and the flow rate, and the structure of the channel 28 can effectively realize the elimination of the air suction noise; specifically, notches are formed in the separating ribs 27, and the notches communicate with the adjacent cavities 26, respectively, and define passages 28.

Further, the cross-sectional area of the cavity 26 > the cross-sectional area of the channel 28 > the cross-sectional area of the exhaust port 22, when the ratio is too small, the gas-liquid separation effect is poor, and if the ratio is too large, the compressed gas cannot be smoothly discharged, and the compression efficiency is low; preferably, the ratio of the cross-sectional area of the cavity 26 to the cross-sectional area of the channel is: 2.5 to 10:1, the ratio of the cross-sectional area of the channel to the cross-sectional area of the exhaust port 22 is 1.5 to 8: 1;

the cylinder body outer wall 122 is of a structure with a concave middle part and a convex periphery, when the cylinder 12 is assembled on the outer wall of the compressor, the convex structure of the cylinder body outer wall 122 is matched with the straight shell of the compressor, and a cavity is formed between the concave middle part of the cylinder body outer wall 122 and the straight shell of the compressor; the cavity can reduce the direct metal contact area between the cylinder 12 and the shell of the compressor, thereby forming a heat insulation broken bridge, reducing the heat transfer between the pump body and the shell when the compressor operates and avoiding the overheating of the shell of the compressor; in addition, when the cylinder outer wall 122 is a straight cylinder, the outer diameters of the upper and lower bearings which are matched with the cylinder 12 can be designed to be larger than the outer diameter of the cylinder, after the assembly is completed by taking the center as a reference, the cylinder outer wall 122 is radially lower than the outer diameters of the upper and lower bearings, and finally, a heat insulation cavity can be formed after the cylinder outer wall 122 is installed in the shell;

in some embodiments of the present invention, the cylinder includes an upper cylinder and a lower cylinder which can be connected to each other through a partition, the upper cylinder includes an upper outer cylinder wall and an upper inner cylinder wall, the lower cylinder includes a lower outer cylinder wall and a lower inner cylinder wall, the upper outer cylinder wall and the lower outer cylinder wall jointly constitute an outer cylinder wall 122, the upper inner cylinder wall and the lower inner cylinder wall jointly constitute an inner cylinder wall 121, the displacement of the compressor can be improved through a combination mode, the processing is convenient, meanwhile, the suction noise can be sufficiently reduced by prolonging the length of circulation, the effect of separating and settling the lubricating oil mixed in the gaseous refrigerant and the liquid cold and light which are not completely gasified is achieved, and the liquid material is prevented from directly entering the compression cavity 21 to cause liquid impact;

further, the suction side chamber 31 includes an upper suction side chamber and a lower suction side chamber which are communicated with each other, the exhaust side chamber 32 includes an upper exhaust side chamber and a lower exhaust side chamber which are communicated with each other, the upper suction side chamber and the upper exhaust side chamber are arranged between the outer wall of the upper cylinder body and the inner wall of the upper cylinder body, the lower suction side chamber and the lower exhaust side chamber are arranged between the outer wall of the lower cylinder body and the inner wall of the lower cylinder body, gas enters from the main gas inlet hole 24, flows through the upper suction side chamber and the lower suction side chamber, enters the inner wall 121 of the cylinder body from the gas inlet hole 25, is compressed, then is discharged from the gas outlet 22, flows through the upper exhaust side chamber and the lower exhaust side chamber, and then is sent to the main gas outlet hole 23; the cavities 26 of the suction side chamber 31 and the cavities 26 of the exhaust side chamber 32 are connected in series, so that the effects of noise reduction and oil-gas separation can achieve an ideal setting effect; wherein through the circulation route of extension refrigerant, increase the flow direction and change the number of times, can further do benefit to the complete gasification of liquid refrigerant and the subsidence of lubricating oil, combine the gaseous state refrigerant flow direction of fig. 5, can set up cylinder and lower cylinder respectively according to particular case, all can do benefit to amortization and oil-gas separation.

EXAMPLE five

On the basis of the embodiment, the utility model also provides a refrigerating and heating system, the refrigerating and heating system comprises an evaporator and a condenser, and a refrigerant circularly flows among the compressor, the evaporator and the condenser; the refrigerant can be the carbon dioxide refrigerant, and the compressor in the refrigeration heating system adopts the compressor in above-mentioned embodiment, and at the during operation, can make more thoroughly of refrigerant and lubricating oil separation, improves refrigeration effect, prevents that lubricating oil from getting into refrigeration district and influencing refrigeration effect, also improves lubricating oil backward flow effect for compressor internals is fully lubricated, and life is more of a specified duration.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an oil-gas separation structure, includes the gas-liquid separation chamber, its characterized in that still includes:

2. The oil-gas separation structure according to claim 1, wherein the mandrel mounting seat is provided with an inner hole, the mandrel is assembled in the inner hole of the mandrel mounting seat, and the first oil passage and the second oil passage are distributed in a staggered manner with respect to the mandrel, so that the mandrel can be limited in the inner hole.

3. The oil-gas separation structure according to claim 1, further comprising a filtering structure, wherein an exhaust hole and an oil discharge hole are formed in the gas-liquid separation cavity, the filtering structure is arranged in the oil discharge hole or between the oil discharge hole and the first oil passing channel, and an inlet of the first oil passing channel is communicated with an outlet of the filtering structure.

4. The oil and gas separation structure of claim 1, wherein the width of the clearance passage is 0.001mm to 0.020 mm.

5. The oil-gas separation structure according to claim 3, wherein the filter structure is a filter element, a magnetic block is mounted on the filter element, and the filter pores of the filter element are smaller than 0.005 mm.

6. The oil-gas separation structure according to claim 5, wherein the magnetic block is T-shaped, cylindrical or inverted concave.

7. A compressor, characterized by comprising the oil-gas separation structure of any one of claims 1 to 6, wherein lubricating oil is arranged in the gas-liquid separation cavity, and the lubricating oil is discharged out of the gas-liquid separation cavity through the first oil passing channel, the clearance channel and the second oil passing channel.

8. A compressor as set forth in claim 7, wherein said compressor comprises:

a compressor housing having a drive assembly disposed therein;

9. The compressor as set forth in claim 8, further comprising:

10. The compressor according to claim 8, wherein the cylinder includes an outer cylinder wall and an inner cylinder wall, the inner cylinder wall having the compression chamber formed therein, the gas-liquid separation chamber being located between the outer cylinder wall and the inner cylinder wall;

11. A compressor according to claim 10, wherein said main discharge hole and said main intake hole are provided in said cylinder or in upper and lower bearings respectively provided in upper and lower sides of said cylinder.

12. The compressor according to claim 10, wherein the gas-liquid separation chamber includes a plurality of cavities for noise reduction and buffering, adjacent cavities are separated by a separation rib provided between the cylinder outer wall and the cylinder inner wall, the separation rib and the inner side of the cylinder outer wall and the outer side of the cylinder inner wall define the cavities, and a passage for communicating the adjacent cavities is provided on the separation rib.

13. A compressor in accordance with claim 12, wherein a part of said cavities constitutes a suction side chamber and another part of said cavities constitutes a discharge side chamber, said suction side chamber communicates with a main intake port, said discharge side chamber communicates with said main discharge port, and gas enters from the main intake port, flows through said suction side chamber, enters said compression chamber from said suction port, is discharged from said discharge port after being compressed by the piston, flows through said discharge side chamber, and then is discharged from the main discharge port.

14. The compressor according to claim 13, wherein a high-low pressure partition is provided between said suction-side chamber and said discharge-side chamber, and a heat insulating groove is provided in said high-low pressure partition.

15. The compressor according to claim 12, wherein the passages include an upper passage and a lower passage, the upper passage is disposed relatively close to or at the top end of the separating reinforcing rib, the lower passage is disposed at the bottom end of the separating reinforcing rib, and a space existing between the upper passage and the lower passage realizes gas-liquid separation so that the upper passage is used for circulating gas and the lower passage is used for circulating liquid.

16. A compressor according to claim 12, wherein the cross-sectional area of said cavity > the cross-sectional area of said passage > the cross-sectional area of said discharge port.

17. A compressor in accordance with claim 16, wherein a ratio of a cross-sectional area of said cavity to a cross-sectional area of said passage is: 2.5 to 10:1, and the ratio of the cross-sectional area of the channel to the cross-sectional area of the exhaust port is 1.5 to 8: 1.

18. The compressor of claim 13, wherein said cylinder includes an upper cylinder and a lower cylinder that are connectable to each other, said upper cylinder including an upper block outer wall and an upper block inner wall, said lower cylinder including a lower block outer wall and a lower block inner wall, said upper block outer wall and said lower block outer wall together constituting said block outer wall, said upper block inner wall and said lower block inner wall together constituting said block inner wall;

19. A compressor according to claim 10, wherein the outer wall of the cylinder block is of a concave central, convex peripheral configuration.

20. A compressor as set forth in claim 8, wherein said oil sump is disposed in said compressor housing below said cylinder, said compressor further comprising oil supply means connected to said oil sump for supplying oil from said oil sump into said cylinder.

21. A compressor according to claim 20 wherein said oil supply is also disposed in said compressor housing below said cylinder.

22. A cooling/heating system comprising a compressor according to any one of claims 7 to 21, an evaporator and a condenser, wherein a refrigerant circulates among the compressor, the evaporator and the condenser.

23. The cooling/heating system of claim 22, wherein the refrigerant is a carbon dioxide refrigerant.