Oil control and return structure for scroll compressor

Abstract

The application discloses a scroll compressor oil control and return structure, and aims to solve the problem of high compressor oil circulation rate, more and more lubricating oil is brought into the refrigeration system with the operation of the compressor, which influences the lubrication of the compressor and further influences the reliability of the compressor. The application comprises a compressor body, a soundproof plate arranged on the upper portion of the compressor body, a sleeving hole arranged on the soundproof plate, a sealed connection between the outer edge of the soundproof plate and the inner wall of the compressor body, an oil pool formed between the inner wall of the compressor body and the outer wall of the soundproof plate, an oil control assembly arranged on the soundproof plate and used for intercepting lubricating oil mist, the oil control assembly covering the sleeving hole, the lubricating oil intercepted by the oil control assembly flowing into the oil pool, a return oil pipe connected to the soundproof plate, one end of the return oil pipe being arranged in the oil pool, and the other end of the return oil pipe penetrating into the inner wall of the soundproof plate. The scroll compressor oil control and return structure can reduce the oil circulation rate of the refrigeration system, and the filtered oil can be returned to the low-pressure side through the return oil pipe and reused.

Description

TECHNICAL FIELD

[0001] The present application relates to a compressor, more particularly, it relates to a scroll compressor oil control and oil return structure. BACKGROUND

[0002] The scroll compressor generally comprises a static scroll and a dynamic scroll, when the compressor is working, the static scroll is fixed, and the dynamic scroll is driven by the motor to mesh with the static scroll. The crankshaft inside the scroll compressor rotates under the drive of the motor, forming a mixture of refrigerant and lubricating oil mist inside the compressor, which is sucked into the compression chamber by the dynamic scroll, and then enters the exhaust chamber to circulate in the refrigeration system. If not controlled, the overall compressor oil circulation rate will be relatively high, and with the operation of the compressor, more and more lubricating oil is brought into the refrigeration system, affecting the lubrication of the compressor, and further affecting the reliability of the compressor. SUMMARY

[0003] In order to overcome the above-mentioned defects, the present application provides a scroll compressor oil control and oil return structure, which can reduce the oil circulation rate of the refrigeration system and improve the refrigeration efficiency of the compressor; after the filtered oil flows into the exhaust chamber, it is returned to the low-pressure side through the oil return pipeline to re-lubricate the friction pair of the compressor, thereby improving the reliability of the whole machine.

[0004] In order to solve the above technical problems, the present application adopts the following technical scheme: a scroll compressor oil control and oil return structure, comprising a compressor body, a sound-absorbing plate arranged on the upper part of the compressor body, the sound-absorbing plate being provided with a sleeving hole, the outer edge of the sound-absorbing plate being sealingly connected with the inner wall of the compressor body, an oil pool being formed between the inner wall of the compressor body and the outer wall of the sound-absorbing plate, an oil control assembly for intercepting lubricating oil mist being connected to the sound-absorbing plate, the oil control assembly covering the sleeving hole, the lubricating oil intercepted by the oil control assembly flowing into the oil pool, an oil return pipe being connected to the sound-absorbing plate, one end of the oil return pipe being arranged in the oil pool, and the other end of the oil return pipe penetrating into the inner wall of the sound-absorbing plate.

[0005] When the compressor is working, the dynamic scroll rotates under the drive of the crankshaft and meshes with the static scroll, and the refrigerant and lubricating oil mist are sucked into the compression chamber, and then discharged through the check valve. The mixture of refrigerant and lubricating oil mist passes through the oil control assembly, the refrigerant and a small part of the lubricating oil mist pass through the oil control assembly, and the remaining lubricating oil mist is intercepted by the oil control assembly and flows into the oil pool formed between the sound-absorbing plate and the bottom of the top cover. Due to the existence of pressure difference, the lubricating oil in the oil pool flows back to the inner wall of the sound-absorbing plate on the low-pressure side through the oil return pipe to lubricate the friction pair inside the compressor. The scroll compressor oil control and oil return structure can reduce the oil circulation rate of the refrigeration system and improve the refrigeration efficiency of the compressor; after the filtered oil flows into the exhaust chamber, it is returned to the low-pressure side through the oil return pipeline to re-lubricate the friction pair of the compressor, thereby improving the reliability of the whole machine.

[0006] As preferred, the oil control assembly comprises a bottom shell and an upper shell connected together, and a filter body installed between the bottom shell and the upper shell.

[0007] The filter body is installed between the bottom shell and the upper shell stably and reliably.

[0008] As preferred, a lower boss is upwardly protruded on the bottom shell, and an upper boss is upwardly protruded on the upper shell, the upper boss covers the lower boss, and the filter body is installed between the outer wall of the lower boss and the inner wall of the upper boss.

[0009] The lower boss and the upper boss realize reliable installation of the filter body.

[0010] As preferred, a plurality of holes are densely arranged on the sidewall of the upper boss and the sidewall of the lower boss.

[0011] The arrangement of the holes facilitates the passing of the medium.

[0012] As preferred, the filter body is of a porous fiber material or a metal filter screen material.

[0013] Such filter body allows the refrigerant to pass through and blocks most of the lubricating oil mist.

[0014] As preferred, the outer wall of the soundproof plate is gradually tapered from the lower end edge to the opening edge of the sleeving hole.

[0015] The gradually tapered outer wall of the soundproof plate facilitates the flow of the oil into the oil pool.

[0016] As preferred, a static scroll is installed on the upper part of the compressor body, a convex disc is arranged on the upper end of the static scroll, and the sleeving hole on the soundproof plate is sealingly sleeved with the convex disc.

[0017] The sleeving hole on the soundproof plate is sealingly sleeved with the convex disc on the static scroll, and the connection is reliable.

[0018] As preferred, the oil return pipe is wound in a spiral structure.

[0019] The spiral oil return pipe is used to store part of the lubricating oil and forms an oil seal.

[0020] As preferred, the compressor body comprises an upper cover, a body, and a lower cover, a positioning convex ring is arranged on the outer wall of the soundproof plate, the positioning convex ring is connected between the upper end of the body and the lower end of the upper cover, and the lower end of the body is connected with the upper end of the lower cover.

[0021] The arrangement of the positioning convex ring facilitates the fastening connection of the soundproof plate and the compressor body.

[0022] As preferred, a flexible oil blocking ring is connected on the inner wall of the lower boss, the oil blocking ring is arranged downwardly and outwardly from the inside, a plurality of oil outlet holes are arranged on the inner wall of the lower boss close to the oil blocking ring, a plurality of lifting plates are hingedly arranged on the inner wall of the lower boss, and the oil blocking ring is supported on the lifting plates.

[0023] The oil liquid remained on the inner wall of the lower boss flows to the oil retaining ring piece under the action of gravity, the oil retaining ring piece is inclined to guide the oil liquid, and the oil liquid is discharged from the upper boss to the oil pool through the oil outlet hole and the filter body. When the compressor works, the medium discharged to the oil control assembly generates upward impact force on the lifting plate, thereby increasing the inclination angle of the oil retaining ring piece, and the flow of the oil liquid on the oil retaining ring piece is accelerated.

[0024] Compared with the prior art, the beneficial effects of the present application are: (1) the oil control and return structure of the scroll compressor can reduce the oil circulation rate of the refrigeration system and improve the refrigeration efficiency of the compressor; the filtered oil liquid flows to the exhaust cavity and then returns to the low-pressure side through the oil return pipeline, thereby re-lubricating the friction pair of the compressor and improving the reliability of the whole machine; (2) the oil liquid remained on the inner wall of the lower boss can be quickly discharged. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a sectional view of the present application;

[0026] Figure 2 is a sectional view of the present application Figure 1 is an enlarged view of A in the sectional view;

[0027] Figure 3 is an enlarged view of B in the sectional view; Figure 1

[0028] Figure 4 is a schematic view of the connection structure of the oil control assembly and the sound-absorbing plate of the present application;

[0029] Figure 5 is an exploded view of the oil control assembly of the present application;

[0030] Figure 6 is a partial schematic view of embodiment 2 of the present application;

[0031] In the figure: 1, compressor body, 2, sound-absorbing plate, 3, upper cover, 4, machine body, 5, lower cover, 6, positioning convex ring, 7, sleeving hole, 8, oil pool, 9, oil control assembly, 10, oil return pipe, 11, static scroll plate, 12, convex plate, 13, flange, 14, bottom shell, 15, upper shell, 16, filter body, 17, lower boss, 18, upper boss, 19, fine hole, 20, oil retaining ring piece, 21, oil outlet hole, 22, lifting plate, 23, convex edge, 24, support arm. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be further described in detail below through specific embodiments and in combination with the drawings:

[0033] Embodiment 1: an oil control and return structure of a scroll compressor (see attached Figure 1 to attached Figure 5 ​), comprising a compressor body 1, a sound attenuation plate 2 arranged on the upper part of the compressor body, the compressor body comprising an upper cover 3, a body 4, and a lower cover 5, a positioning convex ring 6 being arranged on the outer wall of the sound attenuation plate, the positioning convex ring being connected between the upper end of the body and the lower end of the upper cover, and the lower end of the body being connected with the upper end of the lower cover. A sleeving hole 7 is arranged at the middle position of the sound attenuation plate; the outer edge of the sound attenuation plate is sealingly connected with the inner wall of the compressor body, and an oil pool 8 is formed between the inner wall of the compressor body and the outer wall of the sound attenuation plate, and the outer wall of the sound attenuation plate is gradually gathered from the lower end edge to the opening edge of the sleeving hole. An oil control assembly 9 for intercepting lubricating oil mist is connected on the sound attenuation plate, the oil control assembly covers the sleeving hole, the lubricating oil intercepted by the oil control assembly flows into the oil pool, an oil return pipe 10 is connected on the sound attenuation plate, one end of the oil return pipe is arranged in the oil pool, and the other end of the oil return pipe penetrates into the inner wall of the sound attenuation plate. The one end of the oil return pipe is welded with the sound attenuation plate. The oil return pipe is wound into a spiral structure. A static scroll 11 is installed on the upper part of the compressor body, a convex disc 12 is arranged on the upper end of the static scroll, and the sleeving hole on the sound attenuation plate is sealingly sleeved with the convex disc. The edge of the sleeving hole is turned downward to form a turned edge 13, the turned edge is sealingly inserted with the outer wall of the convex disc, and a sealing ring is installed between the turned edge and the convex disc.

[0034] The oil control assembly comprises a bottom shell 14 and an upper shell 15 connected together, and a filter body 16 is installed between the bottom shell and the upper shell. A lower convex platform 17 protruding upward is arranged on the bottom shell, and an upper convex platform 18 protruding upward is arranged on the upper shell, the upper convex platform covers the lower convex platform, and the filter body is installed between the outer wall of the lower convex platform and the inner wall of the upper convex platform. A plurality of fine holes 19 are densely arranged on the side wall of the upper convex platform and the side wall of the lower convex platform. The filter body is annular, and is made of porous fiber material or metal filter screen material. The upper shell and the bottom shell are connected together and are fastened with the sound attenuation plate by means of bolt connection or welding connection.

[0035] When the compressor works, the dynamic scroll rotates under the driving of the crankshaft, meshes with the static scroll, and sucks in refrigerant and lubricating oil mist into the compression chamber, and then discharges the mixture through the check valve. The mixture of refrigerant and lubricating oil mist passes through the oil control assembly, the refrigerant and a small part of the lubricating oil mist pass through the oil control assembly, and the remaining lubricating oil mist is intercepted by the oil control assembly and flows into the oil pool formed between the sound attenuation plate and the bottom of the top cover. Due to the existence of pressure difference, the lubricating oil in the oil pool flows back to the low-pressure side of the inner wall of the sound attenuation plate through the oil return pipe, and is used to lubricate the friction pairs in the compressor. The oil control and oil return structure of the scroll compressor can reduce the oil circulation rate of the refrigeration system and improve the refrigeration efficiency of the compressor. After the filtered oil flows into the discharge chamber, it flows back to the low-pressure side through the oil return pipe, lubricates the friction pairs of the compressor again, and improves the reliability of the whole machine.

[0036] Embodiment 2: An oil control and oil return structure of a scroll compressor (see FIG. 2) Figure 6), the structure of which is similar to that of Example 1, the main difference being that in this example, a flexible oil baffle 20 is connected to the inner wall of the lower boss, the oil baffle is arranged downwardly and obliquely from inside to outside, and a plurality of oil outlet holes 21 are arranged on the inner wall of the lower boss near the oil baffle; a plurality of lifting plates 22 are hingedly arranged on the inner wall of the lower boss in a uniform manner, and the oil baffle is supported on the lifting plates. The height position of the oil outlet holes is lower than that of the fine holes on the lower boss. A raised edge 23 is arranged on the inner wall of the lower boss, the lower end of the lifting plate is hingedly arranged on the edge of the raised edge, a support arm 24 is arranged on the raised edge, and the lifting plate is supported on the support arm, so that the lifting plate can be rotated upwardly but not downwardly. The other structures are the same as those of Example 1.

[0037] The residual oil on the inner wall of the lower boss flows to the oil baffle under the action of gravity, the oblique oil baffle plays a guiding role on the oil, and the oil is discharged from the upper boss through the oil outlet holes and the filter body and flows into the oil pool. When the compressor is working, the medium discharged to the oil control assembly acts on the lifting plate in an upward direction, thereby increasing the oblique angle of the oil baffle, which is beneficial to accelerating the flow of the oil on the oil baffle.

[0038] The above-described examples are only the preferred schemes of the present application, and do not limit the present application in any form. There are other variants and modifications without exceeding the technical scheme recited in the claims.

Claims

1. A structure for controlling and returning oil in a scroll compressor, characterized by, The compressor body, the soundproof board provided on the upper part of the compressor body, the sleeve hole provided on the soundproof board, the sealed connection between the outer edge of the soundproof board and the inner wall of the compressor body, the oil pool formed between the inner wall of the compressor body and the outer wall of the soundproof board, the oil control assembly connected on the soundproof board for intercepting the lubricating oil mist, the cover of the oil control assembly covering the sleeve hole, the lubricating oil intercepted by the oil control assembly flowing into the oil pool, the oil return pipe connected on the soundproof board, one end of the oil return pipe being arranged in the oil pool, the other end of the oil return pipe penetrating into the inner wall of the soundproof board, the oil control assembly comprising a bottom shell and an upper shell connected together, the filter body being arranged between the bottom shell and the upper shell, the lower boss being arranged on the bottom shell and protruding upward, the upper boss being arranged on the upper shell and protruding upward, the upper boss covering the lower boss, the filter body being arranged between the outer wall of the lower boss and the inner wall of the upper boss, the flexible oil blocking ring being arranged on the inner wall of the lower boss, the oil blocking ring being arranged downward and outward from inside, the oil outlet holes being arranged on the inner wall of the lower boss and close to the oil blocking ring, the lifting plates being hingedly arranged on the inner wall of the lower boss and uniformly distributed, and the oil blocking ring being supported on the lifting plates.

2. The oil control and return structure of a scroll compressor according to claim 1, wherein The upper boss and the lower boss are both densely provided with a plurality of fine holes.

3. The oil control and return structure of a scroll compressor according to claim 1, wherein The filter body is made of porous fiber material or metal filter screen material.

4. The oil control and return structure of a scroll compressor according to claim 1, wherein The outer wall of the soundproof board is gradually tapered from the lower end edge to the opening edge of the sleeve hole.

5. The oil control and return structure of a scroll compressor according to claim 1, wherein The compressor body is provided with a static scroll disc on the upper part, the upper end of the static scroll disc is provided with a convex disc, and the sleeve hole on the soundproof board is sealed and sleeved with the convex disc.

6. The oil control and return structure of a scroll compressor according to any one of claims 1 to 5, characterized in that, The oil return pipe is wound in a spiral structure.

7. The oil control and return structure of a scroll compressor according to any one of claims 1 to 5, characterized in that, The compressor body comprises an upper cover, a body, and a lower cover, the outer wall of the soundproof board is provided with a positioning convex ring, the positioning convex ring is connected between the upper end of the body and the lower end of the upper cover, and the lower end of the body is connected with the upper end of the lower cover.

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