CN212481772U - Oil return filter, gas-liquid separator and air conditioner - Google Patents

Abstract

The application provides an oil return filter, vapour and liquid separator and air conditioner, oil return filter includes: the inner part of the shell is enclosed to form an inner cavity; the filter screen assembly comprises a filter screen and a blocking part, the blocking part is connected to one end of the filter screen, at least one through hole is formed in the blocking part, the blocking part divides the inner cavity into a first cavity and a second cavity, and the first cavity is communicated with the second cavity through the through hole. According to the oil return filter, the blocking piece is arranged on the filter screen assembly, the blocking piece has a blocking effect on oil flowing from an oil return port at the bottom of the gas-liquid separator tank body to the compressor, the oil amount flowing back to the compressor is reduced, performance matching is carried out at the initial stage of air conditioner development, the oil return holes are adjusted by arranging through holes with corresponding quantity and/or size, the size of oil return amount can be controlled, and a good oil return effect is formed; when the tank body is maintained, the whole tank body is not required to be replaced, and only the oil return filter outside the tank body is replaced, so that the maintenance cost can be effectively reduced.

Description

Oil return filter, gas-liquid separator and air conditioner

Technical Field

The application belongs to the technical field of air conditioning equipment, and more particularly relates to an oil return filter, a gas-liquid separator and an air conditioner.

Background

Electrical appliances such as an air conditioner are generally provided with a gas-liquid separator, an oil return filter is arranged in the gas-liquid separator, and due to the fact that oil return holes of the gas-liquid separator are large in size and specification, manufacturers are difficult to distinguish and often repair; in addition, the oil return hole is easy to be dirty and blocked in the air conditioning system, the whole gas-liquid separator needs to be replaced during maintenance, great waste is caused, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide an oil return filter to solve the oil return filter that has vapour and liquid separator among the prior art and set up inside, the oil gallery size and specification is many, is difficult to distinguish, often reprocesses, and the oil gallery takes place filth stifled phenomenon very easily in air conditioning system, need change whole vapour and liquid separator during the maintenance, causes the waste, the higher technical problem of maintenance cost.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is an oil return filter including:

the inner part of the shell is enclosed to form an inner cavity;

the filter screen assembly is arranged in the shell and is connected with the inner wall of the shell in a matched mode, the filter screen assembly comprises a filter screen and a blocking piece, the blocking piece is connected with one end of the filter screen, at least one through hole is formed in the blocking piece, the blocking piece divides the inner cavity into a first cavity and a second cavity, the filter screen is located in the first cavity, and the first cavity is communicated with the second cavity through the through hole.

In one embodiment, the blocking member is a clamping band, the clamping band comprises a blocking piece and a clamping ring connected to the periphery of the blocking piece, the clamping ring is connected with the inner wall of the shell in a matched mode, one end of the filter screen is connected with the blocking piece or the clamping ring, and the through hole is formed in the blocking piece.

In one embodiment, the outer peripheral wall of the snap ring is clamped, interference-connected or welded to the inner wall of the housing.

In one embodiment, the inner wall of the shell is convexly provided with an annular bulge, and the clamping ring is clamped with the annular bulge.

In one embodiment, a protruding ring is arranged at one end of the filter screen close to the second cavity, the snap ring comprises an inner ring and an outer ring which are connected, the outer ring is arranged on the outer peripheral side of the inner ring, the outer ring is clamped with the annular protrusion, one end of the inner ring, which is far away from the outer ring, is connected to the periphery of the blocking piece, an annular clamping groove matched with the protruding ring is formed by the outer ring and the inner ring in a surrounding mode, and the protruding ring is clamped in the annular clamping groove.

In one embodiment, the through hole is formed in the center of the blocking piece.

In one embodiment, the blocking piece is arc-shaped and is bent towards the direction of the filter screen.

In one embodiment, the filter screen is funnel-shaped, and the width of the cross section of the filter screen is gradually increased from the first chamber to the second chamber.

Another aim at of this application provides a vapour and liquid separator, including a jar body with locate the external above-mentioned oil return filter of jar, the bottom of the jar body is equipped with back oil pipe, the jar body passes through back oil pipe with oil return filter's first cavity intercommunication.

Still another aim at of this application provides an air conditioner, including the compressor and with the above-mentioned oil return filter that the compressor is connected, oil return filter connect in the compressor with between the jar body.

The application provides an oil return filter's beneficial effect lies in: compared with the prior art, the oil return filter has the advantages that the blocking piece is arranged on the filter screen assembly, the blocking piece has a blocking effect on oil flowing from an oil return port at the bottom of the gas-liquid separator tank body to the compressor, the oil amount flowing back to the compressor is reduced, performance matching is carried out at the initial stage of air conditioner development, the oil return holes are adjusted by arranging through holes with corresponding quantity and/or size, the size of oil return quantity can be controlled, and a good oil return effect is formed; when the tank body is maintained, the whole tank body is not required to be replaced, and only the oil return filter outside the tank body is replaced, so that the maintenance cost can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of an oil return filter provided in an embodiment of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of a clamp of the oil return filter shown in FIG. 1;

fig. 4 is a schematic structural diagram of a gas-liquid separator according to an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

10-return oil filter; 20-a gas-liquid separator; 21-tank body; 22-oil return pipe; 23-an air inlet pipe; 24-an air outlet pipe; 25-secondary oil return hole; 100-a housing; 200-a screen assembly; 101-a first chamber; 102-a second chamber; 110-a first open end; 120-a second open end; 130-a necking section; 131-a straight tube section; 132-a conical section; 140-an annular projection; 150-an annular groove; 210-a filter screen; 211-convex ring; 220-a barrier; 230-a hoop; 231-a blocking piece; 232-snap ring; 2310-a through hole; 2320-inner ring; 2321-outer loop; 2322-ring card slot.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

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

Referring to fig. 1, fig. 2, and fig. 4, a description will now be given of a return oil filter 10 according to an embodiment of the present application. The return oil filter 10 comprises a housing 100 and a filter screen assembly 200. The housing 100 may be an integrally formed part, or may be assembled and formed by splicing several shells; an inner cavity is defined inside the casing 100, one end of the casing 100 can be connected with an oil return port at the bottom of the tank 21 of the gas-liquid separator 20, and the other end of the casing 100 can be connected with an oil return port of the compressor. The two ends of the housing 100 along the axial direction are respectively provided with a first opening end 110 and a second opening end 120; the two ends of the housing 100 in the axial direction are respectively provided with a necking section 130, the necking section 130 comprises a straight pipe section 131 and a conical section 132 which are connected, the caliber of the conical section 132 is gradually reduced along the outward direction of the housing 100 in the axial direction, and the straight pipe sections 131 at the two ends are respectively connected with an oil return port at the bottom of the tank body 21 of the gas-liquid separator 20 and an oil return port of the compressor through oil return pipes.

A filter screen assembly 200 is disposed within the housing 100, the filter screen assembly 200 including a filter screen 210 and a baffle 220. The filter screen assembly 200 is connected with the inner wall of the housing 100 in a matching way, and the filter screen assembly 200 can be in interference fit with the inner wall of the housing 100, welded or clamped through a clamping structure; the blocking piece 220 is provided with at least one through hole 2310, the inner cavity of the shell 100 is divided into a first cavity 101 and a second cavity 102 by the blocking piece 220, and the filter screen 210 is positioned in the first cavity 101; the first chamber 101 is in communication with the second chamber 102 through the through holes 2310, so that the oil flowing from the first open end 110 flows to the second open end 120 through the through holes 2310 of the blocking member 220 after being filtered by the filter screen 210, and then flows to the compressor. Due to the arrangement of the blocking element 220, the oil flowing into the shell 100 from the gas-liquid separator 20 is blocked by the blocking element 220, the oil amount flowing back to the compressor is reduced, and the blocking phenomenon can be effectively prevented; meanwhile, because the oil return filter 10 is located outside the tank body 21 of the gas-liquid separator 20, performance matching can be performed at the initial stage of air conditioner development, the oil return holes are adjusted by setting the through holes 2310 corresponding to the number and/or size of the oil return holes, the size of the oil return amount can be controlled, a good oil return effect is formed, the whole tank body 21 does not need to be replaced when the tank body 21 is maintained, only the oil return filter 10 outside the tank body 21 is replaced, and the maintenance cost can be effectively reduced.

Compared with the prior art, the oil return filter 10 provided by the application has the advantages that the blocking piece 220 is arranged on the filter screen assembly 200, the blocking piece 220 has a blocking effect on oil flowing from an oil return port at the bottom of the tank body 21 of the gas-liquid separator 20 to the compressor, the oil amount flowing back to the compressor is reduced, performance matching is carried out at the initial stage of air conditioner development, the oil return holes are adjusted by arranging through holes with corresponding quantity and/or size, the size of the oil return amount can be controlled, and a good oil return effect is formed; when the tank body 21 is repaired, the whole tank body 21 does not need to be replaced, and only the oil return filter 10 outside the tank body 21 is replaced, so that the maintenance cost can be effectively reduced.

In one embodiment, the blocking member 220 is a clip 230, the clip 230 includes a stop 231 and a snap ring 232 connected to the periphery of the stop 231, the snap ring 232 is connected to the inner wall of the housing 100 near the second open end 120; one end of the filter screen 210 is connected with the blocking piece 231 or the snap ring 232, the blocking piece 231 forms a blocking piece 220, and the through hole 2310 is formed in the blocking piece 231; the blocking plate 231 may be formed with a through hole 2310 or a plurality of through holes 2310, and the through hole 2310 may be a circular hole, an elliptical hole or a hole with other shapes. That is, the filter screen 210 is assembled in the housing 100 through the clip 230, and the filter screen 210 and the clip 230 can be assembled before being integrally placed in the housing 100 for assembly; the snap ring 232 and the baffle 231 jointly divide the inner cavity of the housing 100 into a first chamber 101 and a second chamber 102, and the first chamber 101 is communicated with the second chamber 102 through a through hole 2310 formed in the baffle 231. Because the pressure of separation blade 231 both sides is different, the thickness of separation blade 231 can set up according to the actual application demand of oil return filter 10, and the impact of fluid in shell 100 can be resisted to the thickness of separation blade 231, is difficult for taking place deformation under the continuous impact of fluid like this.

In one embodiment, the outer peripheral wall of the snap ring 232 is snapped, interference bonded, or welded to the inner wall of the housing 100. When the clamping ring 232 is mounted on the inner wall of the housing 100 in a clamping manner, a clamping structure matched with the clamping ring 232 can be arranged between the clamping ring 232 and the inner wall of the housing 100, so that the clamping ring 230 and the filter screen 210 can be conveniently mounted integrally; when the clamping ring 232 is installed by welding, the clamping ring 232 and the housing 100 can be welded and fixed by brazing in a furnace.

In an embodiment, referring to fig. 1 and 2, an annular protrusion 140 protrudes from an inner wall of the housing 100, and the snap ring 232 is engaged with the annular protrusion 140. The annular protrusion 140 may be an arc-shaped protrusion, which facilitates the snap-in operation of the snap ring 232; one or more annular protrusions 140 can be arranged, and when one annular protrusion 140 is arranged, the clamping ring 232 is pressed into the shell 100 and moves to just slide over the annular protrusion 140, so that the clamping operation of the two is completed; when annular protrusion 140 is provided with a plurality ofly, the distance adaptation snap ring 232 axial direction's length between two adjacent annular protrusions 140, snap ring 232 can the joint between two adjacent annular protrusions 140 like this, only need during the installation with the clamp 230 of being equipped with filter screen 210 impress in the shell 100, move to wherein between two adjacent annular protrusions 140 just until snap ring 232, just so accomplish the assembly operation between filter screen subassembly 200 and the shell 100, installation simple operation.

In an embodiment, referring to fig. 1 and 2, a protruding ring 211 is disposed at one end of the filter screen 210 close to the second chamber 102, the snap ring 232 includes an inner ring 2320 and an outer ring 2321 connected to each other, the outer ring 2321 is disposed on an outer peripheral side of the inner ring 2320, the inner ring 2321, the outer ring 2321, the blocking plate 231 and the filter screen 210 are coaxially disposed, the outer ring 2321 is clamped with the annular protrusion 140, one end of the inner ring 2320, which is away from the outer ring 2321, is connected to a periphery of the blocking plate 231, an annular groove 2322 adapted to the protruding ring 211 is defined by the outer ring 2321 and the inner ring 2320, and the. As shown in fig. 1 and 2, in an embodiment, the snap ring 232 and the blocking piece 231 are integrally formed, the axial lengths of the inner ring 2320 and the outer ring 2321 are equal, and the joint between the inner ring 2320 and the outer ring 2321 is in a smooth transition, so that the inner wall of the housing 100 is not scratched when the clip 230 is pressed into the housing 100; two annular grooves 150 are punched and formed at different positions of one end, close to the second opening end 120, of the outer wall of the shell 100, two annular protrusions 140 are formed at positions, corresponding to the annular grooves 150, of the inner wall of the shell 100 in a protruding mode, the two annular protrusions 140 are arc-shaped protrusions, and two ends of the outer ring 2321 are clamped between the two annular protrusions 140.

In an embodiment, referring to fig. 1 and 3, a through hole 2310 is formed in the center of the blocking piece 231, that is, the center of the through hole 2310 coincides with the central axis of the housing 100, so that the impact force applied to the two opposite sides of the blocking piece 231 is relatively balanced, and the blocking piece 231 is not easily deformed locally. The size of the aperture of the through hole 2310 can be set according to the actual application requirement so as to be matched with the preset oil return amount.

In an embodiment, referring to fig. 1, the blocking piece 231 is curved and bent toward the filter screen 210, and the blocking piece 231 is accommodated in a space defined inside the filter screen 210, so that the blocking piece 231 has a better deformation resistance, when oil enters the first chamber 101, is filtered by the filter screen 210, and then flows toward the blocking piece 231, the blocking piece 231 is subjected to a larger impact force, and the blocking piece 231 is bent in such a way, so that the impact resistance of the blocking piece 231 can be effectively improved. It will be appreciated that the flap 231 may also be flat or curved away from the first open end 110.

In an embodiment, referring to fig. 1, the filter 210 is funnel-shaped, and the width of the cross section of the filter 210 gradually increases from the first chamber 101 to the second chamber 102, i.e. from the first open end 110 to the second open end 120. The filter screen 210 is arranged in a funnel shape, so that oil can be guided into the housing 100 conveniently, contact area between the oil and the filter screen 210 and smoothness of oil flowing in the housing 100 can be considered conveniently, and the filter screen 210 can better exert a filtering effect.

Referring to fig. 1 and 4, the gas-liquid separator 20 according to the embodiment of the present application includes a tank 21 and an oil return filter 10 disposed outside the tank 21, where the oil return filter 10 is the oil return filter 10 according to the embodiment, an oil return pipe 22 is disposed at the bottom of the tank 21, and the tank 21 is communicated with a first chamber 101 of the oil return filter 10 through the oil return pipe 22. The first open end 110 and the second open end 120 of the housing 100 are connected and communicated with an oil return port at the bottom of the tank 21 and an oil return port of the compressor through oil return pipes, respectively. Because the oil return filter 10 is generally arranged inside the gas-liquid separator 20, and the size and the specification of an oil return hole are large, the oil return filter 10 is difficult to distinguish and is frequently repaired by manufacturers, and the oil return filter 10 is easy to be dirty and blocked. In the embodiment, the oil return filter 10 is arranged outside the tank body 21, so that the whole gas-liquid separator 20 can be prevented from being replaced together during maintenance, waste of resources is avoided, the manufacturing and maintenance cost can be effectively reduced, and the risk of leakage is reduced; meanwhile, the oil return filter 10 is arranged outside the tank body 21, performance matching is carried out at the initial stage of air conditioner development, the oil return holes can be adjusted by arranging through holes corresponding to the number and/or size, and the oil return amount can be controlled.

Referring to fig. 4, the air conditioner according to the embodiment of the present application includes a compressor and the gas-liquid separator 20 according to the above embodiment, and the oil return filter 10 is connected between the compressor and a tank 21 of the gas-liquid separator 20. Since the gas-liquid separator 20 includes the oil return filter 10 of the above embodiment, and the oil return filter 10 is disposed outside the tank 21 of the gas-liquid separator 20, the air conditioner of the present embodiment has all the above beneficial effects. The top of the tank body 21 of the gas-liquid separator 20 can be provided with an air inlet pipe 23 and an air outlet pipe 24 which penetrate through the inside and outside of the tank body 21, one end of the air outlet pipe 24 exposed out of the tank body 21 is communicated with the compressor, and the part of the air outlet pipe 24 extending into the tank body 21 can be provided with an auxiliary oil return hole 25, so that the oil return filter 10 outside the tank body 21 forms a main oil return hole; when the air conditioning system runs, oil is returned through an oil return pipe 22 at the bottom of the tank body 21, and the oil return amount is adjusted through a main oil return hole outside the tank body 21; when the system is abnormal, and the oil level in the tank body 21 is higher than the position of the auxiliary oil return hole 25, the excessive oil in the tank body 21 starts to enter the air outlet pipe 24 through the auxiliary oil return hole 25 and returns to the compressor together with the liquid refrigerant through the air outlet pipe 24, so that the compressor is ensured not to be lack of oil, the normal operation of the system is ensured, namely the compressor is not easy to block due to excessive oil return, and also can be ensured not to be lack of oil, and thus, double guarantee is ingeniously formed.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. An oil return filter which characterized in that: the method comprises the following steps:

the inner part of the shell is enclosed to form an inner cavity, one end of the shell can be connected with an oil return port at the bottom of the tank body of the gas-liquid separator, and the other end of the shell can be connected with an oil return port of the compressor;

the filter screen assembly is arranged in the shell and is connected with the inner wall of the shell in a matched mode, the filter screen assembly comprises a filter screen and a blocking piece, the blocking piece is connected with one end of the filter screen, at least one through hole is formed in the blocking piece, the blocking piece divides the inner cavity into a first cavity and a second cavity, the filter screen is located in the first cavity, and the first cavity is communicated with the second cavity through the through hole.

2. The oil return filter of claim 1, wherein: the stop piece is the clamp, the clamp include the separation blade with connect in separation blade circumferential snap ring, the snap ring with the inner wall cooperation of shell is connected, the one end of filter screen with the separation blade or the snap ring is connected, the through-hole is seted up in the separation blade.

3. The oil return filter of claim 2, wherein: the periphery wall joint of snap ring, interference fit connection or weld in on the inner wall of shell.

4. The oil return filter of claim 3, wherein: the inner wall of the shell is convexly provided with an annular bulge, and the clamping ring is clamped with the annular bulge.

5. The return oil filter of claim 4, wherein: the filter screen is close to the one end of second cavity is equipped with the bulge loop, the snap ring is including inner ring and the outer loop that is connected, the outer loop is located the periphery side of inner ring, the outer loop with annular protruding joint, the inner ring is kept away from the one end of outer loop connect in the periphery of separation blade, the outer loop with enclose into the adaptation between the inner ring the ring groove of bulge loop, the bulge loop joint in the ring groove.

6. The oil return filter of claim 2, wherein: the central position of the baffle plate is provided with the through hole.

7. The oil return filter of claim 2, wherein: the separation blade is the arc and towards the direction bending of filter screen.

8. The oil return filter of any one of claims 1-7 wherein: the filter screen is funnel-shaped, the width of filter screen cross section is followed first cavity extremely the direction grow gradually of second cavity.

9. A gas-liquid separator characterized by: comprising a tank body and the oil return filter according to any one of claims 1 to 8 arranged outside the tank body, wherein the bottom of the tank body is provided with an oil return pipe, and the tank body is communicated with the first chamber of the oil return filter through the oil return pipe.

10. An air conditioner, characterized in that: comprising a compressor and a gas-liquid separator according to claim 9 connected to the compressor, the oil return filter being connected between the compressor and the tank.

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