JPH1114198A - Gas/liquid separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abrasion of the sliding parts in a compressor by disposing a permanent magnet on the lower end plate of a gas/liquid separator body directly below an oil return hole made in a coolant supply tube thereby preventing iron powder, or the like, supplied through the oil return hole into the gas/liquid separator body from intruding into the compressor along with an oil. SOLUTION: At the time of operating the refrigeration circuit of an air conditioner, or the like, iron powder or iron chips being left internally during manufacture of the components of refrigeration circuit, e.g. a compressor, and iron powder produced during initial abrasion of the sliding components in the compressor are mixed with coolant or oil and circulated through the refrigeration circuit. The coolant and the oil flow into a gas/liquid separator body 1 in front of the compressor as a mixture of liquid coolant and oil at the time of cooling operation and as a mixture of gas coolant and oil at the time of warming operation. The iron powder flowing into the gas/liquid separator body 1 begins to flow into the compressor through the oil return hole 7 of a coolant supply tube, but it is captured surely by a permanent magnet 8 disposed on the lower end plate 4 directly under the oil return hole 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid separator capable of adsorbing and collecting iron powder mixed in refrigerant and oil flowing in a refrigeration circuit.

[0002]

2. Description of the Related Art In a refrigerant and an oil circulating in a refrigeration circuit of an air conditioner or the like, iron powder or iron cutting powder left inside during manufacturing of a refrigeration circuit component such as a compressor, or a compressor slide. Iron powder and the like generated by initial wear of moving parts are mixed. When iron powder or the like mixed in the refrigerant and the oil circulates and enters the compressor, the wear of sliding parts of the compressor may be promoted. In order to solve this problem, a gas-liquid separator for adsorbing and collecting iron powder and the like has been proposed.

A conventional gas-liquid separator is disclosed in
There is one disclosed in JP-A-183357.

Hereinafter, the conventional gas-liquid separator will be described with reference to the drawings. FIG. 5 is a sectional view of a conventional gas-liquid separator. In FIG. 5, 30 is a gas-liquid separator main body, 31 is a refrigerant introduction pipe, 32 is a mesh filter, 33 is a fixture, 3
Reference numeral 4 denotes a body, 35 denotes a refrigerant outlet pipe, and 36 denotes a permanent magnet.
The fixing bracket 33 has a conical shape and supports the mesh filter 32. In addition, a lower portion of the fixing bracket 33 is provided with a groove formed between itself and the body 34. Further, the permanent magnet 36 is provided at an end of the refrigerant outlet pipe 35.

The operation of the gas-liquid separator configured as described above will be described below. First, iron powder or the like mixed in the refrigerant and oil flows into the gas-liquid separator main body 30 from the refrigerant introduction pipe 31 and is stored on the mesh filter 32. However, when the iron powder and the like stored on the mesh filter 32 are solidified to a certain extent, the iron powder slides down the surface of the mesh filter 32 due to the weight of the solidified mass and the flow rate of the refrigerant, and the conical fixing bracket 33 Most of the water is stored between the lower part and the body 34, and a part of the water passes through the mesh filter 32.
Due to the magnetic attraction of the permanent magnet 36 disposed at the end of the refrigerant outlet pipe 35, iron powder and the like flowing out of the refrigerant outlet pipe 35 are attracted to the permanent magnet 33.

[0006]

However, in the above-mentioned conventional construction, when an oil return hole for returning oil to the compressor is provided in the refrigerant outlet pipe 35, the oil return hole is inserted into the gas-liquid separator main body 30 through the oil return hole. There is a disadvantage that the iron powder or the like that has flowed into the compressor together with the oil accelerates wear of sliding parts of the compressor.

The present invention solves the conventional problem. Even when an oil return hole is provided in a refrigerant outlet pipe, iron powder or the like flowing into the gas-liquid separator enters the compressor through the oil return hole. It is an object of the present invention to provide a gas-liquid separator which can prevent the sliding of the compressor and promote the wear of the sliding parts of the compressor.

[0008]

In order to solve this problem, in the present invention, a permanent magnet is provided on a lower end plate of a gas-liquid separator body immediately below an oil return hole provided in a refrigerant outlet pipe.

As a result, iron powder and the like flowing out of the oil return hole and entering the compressor can be surely adsorbed and collected, thereby preventing abrasion of the sliding parts of the compressor.

Further, according to the present invention, the center of the bottom surface of the main body of the gas-liquid separator just below the oil return hole provided in the refrigerant outlet pipe is raised in the direction of the oil return hole to thereby provide the gas-liquid separator. In the deformed lower end plate having a circumferential V-shaped groove formed on the bottom surface of the separator main body, permanent magnets were provided at the apex of the raised portion and the V-shaped groove, respectively.

Thus, iron powder and the like flowing out of the oil return hole and entering the compressor and iron powder and the like deposited on the bottom of the main body of the gas-liquid separator when the refrigeration circuit is stopped are reliably adsorbed and collected.
It is possible to prevent the wear of the sliding parts of the compressor from being promoted.

Further, according to the present invention, a mesh having the same size as the inner diameter of the gas-liquid separator main body is provided on the wall surface of the lower end plate corresponding to the space between the oil return hole provided in the refrigerant outlet pipe and the bottom surface of the gas-liquid separator main body. And two spherical permanent magnets were placed between the meshes so that the spherical permanent magnets were in contact with the meshes and were evenly distributed.

Thus, the iron powder and the like flowing into the main body of the gas-liquid separator can be adsorbed and trapped by the mesh, and even if the inside of the gas-liquid separator becomes only oil during the cooling operation, it floats in the oil. Iron powder and the like are surely adsorbed and collected, and iron powder and the like flowing out from the oil return hole are also surely adsorbed and trapped, so that wear of sliding parts of the compressor can be prevented from being promoted.

Further, according to the present invention, a mesh having the same size as the inner diameter of the gas-liquid separator main body and through which the refrigerant outlet pipe penetrates is provided on the body wall surface corresponding to the space between the end of the refrigerant outlet pipe and the oil return hole. Two pieces were installed, and between the meshes, spherical permanent magnets were installed so as to be in contact with the mesh and to be evenly distributed.

Thus, the iron powder and the like flowing into the main body of the gas-liquid separator are adsorbed and captured by the mesh, and even if the liquid level rises due to the liquid refrigerant and the oil during the heating operation, the liquid refrigerant or the oil This reliably absorbs and collects iron powder and the like floating on the surface, and also reliably absorbs and captures iron powder and the like flowing out of the oil return hole, thereby preventing abrasion of sliding parts of the compressor.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a lower portion of the gas-liquid separator main body immediately below an oil return hole provided in a refrigerant outlet pipe in the gas-liquid separator main body. A permanent magnet is provided on the head plate, and even when iron powder or the like contained in refrigerant or oil flows into the gas-liquid separator body during the operation of the refrigeration circuit and attempts to flow out of the oil return hole, the oil is returned. Due to the magnetic attraction of the permanent magnet installed immediately below the hole, the iron powder or the like approaching the oil return hole is surely adsorbed and collected.

According to a second aspect of the present invention, in the gas-liquid separator main body, a central portion of the bottom surface of the gas-liquid separator main body immediately below an oil return hole provided in the refrigerant outlet pipe is provided.
In the modified lower end plate in which a circumferential V-shaped groove is formed on the bottom surface of the gas-liquid separator main body by being raised in the oil return hole direction, permanent magnets are provided at the apex of the raised portion and the V-shaped groove, respectively. Yes, during operation of the refrigeration circuit, even when iron powder and the like contained in the refrigerant and oil flow into the gas-liquid separator main body and try to flow out of the oil return hole, it is installed at the top of the ridge point just below the oil return hole. Due to the magnetic attraction of the permanent magnet, iron powder and the like approaching the oil return hole are reliably adsorbed and collected. Further, when the refrigeration circuit is stopped, the iron powder and the like contained in the liquid refrigerant and oil are compressed by gravity. Although it sinks at the bottom of the liquid separator main body, a deformed lower end plate with a circumferential V-shaped groove is installed on the bottom of the gas-liquid separator main body, so that the sinking iron powder etc. concentrates on the V-shaped groove. Permanent magnet with deposited and deposited iron powder in V-shaped groove Reliably attracted by the magnetic attraction force, an effect that is collected.

According to a third aspect of the present invention, in a gas-liquid separator main body, a lower end plate wall surface corresponding to an oil return hole provided in a refrigerant outlet pipe and a gas-liquid separator main body bottom surface is provided. Two meshes of the same size as the inner diameter of the gas-liquid separator main body are installed on the upper and lower sides, and between the meshes, spherical permanent magnets are installed so as to be in contact with the mesh and be uniformly distributed,
Since the mesh is magnetized by the magnetic force of the permanent magnet,
Iron powder and the like that are contained in the refrigerant and oil and flow into the gas-liquid separator main body are adsorbed when passing through a mesh or spherical permanent magnet.
Be captured. When superheat is removed during cooling operation and the oil inside the gas-liquid separator becomes only oil, iron powder that is not adsorbed by the mesh or the spherical permanent magnet and floats in the oil has a liquid surface of the mesh or the spherical permanent oil. When moving up and down the magnet part, it is attracted and captured by the magnetic attraction of the mesh or the spherical permanent magnet. Further, the iron powder or the like which tends to flow out of the oil return hole has an effect of being surely adsorbed and collected by the magnetic attraction force of the mesh or the spherical permanent magnet immediately below the oil return hole.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, further, in the body of the gas-liquid separator, the body corresponding to the space between the end of the refrigerant outlet pipe and the oil return hole is provided. Two upper and lower meshes having the same size as the inner diameter of the liquid separator main body and through which the refrigerant outlet pipe penetrates are installed. Between the meshes, spherical permanent magnets are installed so as to be in contact with the meshes and to be evenly distributed. Since the mesh of this part is also magnetized by the magnetic force of the spherical permanent magnet, iron powder and the like contained in the refrigerant and oil and flowing into the gas-liquid separator main body are installed in the gas-liquid separator main body. When passing through the upper and lower meshes and the spherical permanent magnets, they are more reliably adsorbed and collected.
Also, if the liquid refrigerant flows with the oil during the heating operation and the liquid level rises, the liquid refrigerant and iron powder floating in the oil that are not adsorbed by the upper and lower meshes and the spherical permanent magnets will have the liquid level of the upper part. When moving the mesh or spherical permanent magnet up and down, it is attracted by the magnetic attraction of the mesh or spherical permanent magnet.
Be captured. Further, the iron powder or the like which tends to flow out of the oil return hole has an effect of being surely adsorbed and collected by the magnetic attraction force of the mesh or the spherical permanent magnet immediately below the oil return hole.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-liquid separator according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a gas-liquid separator according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes a gas-liquid separator main body, which is structured such that upper and lower ends of a body 2 are closed by an upper end plate 3 and a lower end plate 4.

Reference numeral 5 denotes a refrigerant introduction pipe for allowing the refrigerant or oil circulated in the refrigeration circuit to flow into the gas-liquid separator main body 1, and is joined through the upper end plate 3 in the axial direction. The end of the refrigerant introduction pipe 5 in the gas-liquid separator main body 1 is directed toward the wall surface of the gas-liquid separator main body 1 so that the flowing refrigerant and oil do not directly hit the liquid surface.

Reference numeral 6 denotes a refrigerant outlet pipe, which is a main body 1 of the gas-liquid separator.
The gas refrigerant inside is discharged to the compressor, and is joined through the upper head plate 3 in the axial direction. The refrigerant outlet pipe 6 is curved in the gas-liquid separator main body 1 and has an end facing upward, so that the liquid refrigerant does not flow directly to the compressor.

Reference numeral 7 denotes an oil return hole for returning oil accumulated in the lower portion of the gas-liquid separator main body 1 to the compressor, and is provided in the refrigerant outlet pipe 6 corresponding to the bottom surface of the gas-liquid separator main body 1.

Reference numeral 8 denotes a permanent magnet, which is installed on the lower head plate 4 immediately below the oil return hole 7.

The operation of the gas-liquid separator configured as described above will be described below. Iron powder and iron cutting powder left inside during the operation of refrigeration circuits such as air conditioners and during production of refrigeration circuit components such as compressors, and iron powder generated by initial wear of compressor sliding parts. However, it is mixed with refrigerant or oil and circulates in the refrigeration circuit. The refrigerant or oil containing iron powder or the like is placed in the gas-liquid separator main body 1 that separates the refrigerant into a gaseous phase and a liquid phase in front of the compressor.
During the heating operation, gas refrigerant and oil flow in. Iron powder and the like flowing into the gas-liquid separator main body 1 tends to flow out of the oil return hole 7 provided in the refrigerant outlet pipe 6 to the compressor. Since the permanent magnets 8 are provided on the end plate 4, iron powder or the like which is likely to flow out due to the magnetic attraction of the permanent magnets 8 can be reliably adsorbed and collected.

As described above, the gas-liquid separator according to the present embodiment is constructed such that the permanent magnet 8 is attached to the lower end plate 4 immediately below the oil return hole 7 provided in the refrigerant outlet pipe 6 in the gas-liquid separator main body 1. Is provided, even when iron powder or the like contained in the refrigerant or oil flows into the gas-liquid separator main body 1 during operation of the refrigeration circuit and attempts to flow out of the oil return hole 7, By the magnetic attraction force of the permanent magnet 8 installed, iron powder and the like approaching the oil return hole 7 are surely adsorbed and collected.
It is possible to prevent the wear of the sliding parts of the compressor from being promoted.

(Embodiment 2) FIG. 2 is a sectional view of a gas-liquid separator according to Embodiment 2 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 2, reference numeral 9 denotes a modified lower end plate,
By raising the center of the bottom surface of the gas-liquid separator body 1 directly below the oil return hole 7 provided in the refrigerant outlet pipe 6 in the direction of the oil return hole 7, a circle is formed on the bottom surface of the gas-liquid separator body 1. A circumferential V-shaped groove is formed, and permanent magnets 8 are provided at the apex of the raised portion on the deformed lower end plate 9 and the V-shaped groove, respectively.

The operation of the gas-liquid separator configured as described above will be described below. Iron powder and iron cutting powder left inside during the operation of refrigeration circuits such as air conditioners and during the manufacture of refrigeration circuit components such as compressors, and iron powder generated by the initial wear of compressor sliding parts. However, it is mixed with refrigerant or oil and circulates in the refrigeration circuit. The refrigerant and oil containing the circulated iron powder and the like are placed in the gas-liquid separator main body 1 that separates the refrigerant into a gas phase and a liquid phase in front of the compressor. Sometimes gas refrigerant and oil flow in. The iron powder or the like flowing into the gas-liquid separator main body 1 tends to flow out of the oil return hole 7 provided in the refrigerant outlet pipe 6 to the compressor. Since the permanent magnets 8 are provided at the apexes of the raised portions of the lower end plate 9, iron powder or the like which is likely to flow out due to the magnetic attraction of the permanent magnets 8 can be reliably adsorbed and collected. When the operation of the refrigeration circuit is stopped, iron powder and the like contained in the liquid refrigerant and oil in the gas-liquid separator main body 1 sink and deposit at the bottom of the gas-liquid separator main body 1 due to gravity, and the iron powder accumulated when the operation is restarted. In such a case, the deformed lower end plate 9 at the bottom of the gas-liquid separator body 1 forms a circular V-shaped groove, and a permanent magnet is formed in the V-shaped groove. 8, the sinking iron powder and the like are concentrated in the circumferential V-shaped groove, and can be reliably attracted and collected by the magnetic attraction of the permanent magnet 8 in the V-shaped groove.

As described above, the gas-liquid separator of the present embodiment is arranged such that, in the gas-liquid separator main body 1, just below the oil return hole 7 provided in the refrigerant outlet pipe 6 whose end is directed upward. By raising the central portion of the bottom surface of the gas-liquid separator main body 1 in the direction of the oil return hole 7, the raised bottom end plate 9 having a circular V-shaped groove formed on the bottom surface of the gas-liquid separator main body 1 is raised. Since the permanent magnets 8 are provided at the apex and the V-shaped groove, iron powder or the like contained in the refrigerant or oil flows into the gas-liquid separator body 1 during operation of the refrigeration circuit, and the oil return hole 7
Even in the case of more spills, the magnetic attraction of the permanent magnet 8 installed at the top of the ridge just below the oil return hole 7 causes
The iron powder and the like approaching the oil return hole 7 are surely adsorbed and collected, and when the operation of the refrigeration circuit is stopped, the iron powder and the like contained in the liquid refrigerant and oil are deposited on the bottom of the gas-liquid separator body 1 by gravity. Although it sinks, the deformed lower end plate 9 having a circumferential V-shaped groove is installed on the bottom surface of the gas-liquid separator main body 1, so that the sinking iron powder and the like are concentrated and deposited in the V-shaped groove. Iron powder etc.
The magnetic attraction of the permanent magnet 8 installed in the mold groove ensures the attraction and collection of the magnet, thereby preventing the sliding parts of the compressor from being worn.

(Embodiment 3) FIG. 3 is a sectional view of a gas-liquid separator according to Embodiment 3 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 3, reference numeral 10 denotes a circular mesh made of an iron-based metal, and the size of the mesh 10 is the same as the inner diameter of the main body of the gas-liquid separator. The upper and lower two meshes 10 are provided on the wall surface of the lower end plate 4 corresponding to between the oil return hole 7 and the bottom surface of the gas-liquid separator main body 1.

Numeral 11 denotes a spherical permanent magnet, which is disposed between the two meshes 10 so as to be in contact with the mesh 10 and to be evenly distributed. .

The operation of the gas-liquid separator configured as described above will be described below. Iron powder and iron cutting powder left inside during the operation of refrigeration circuits such as air conditioners, and the production of refrigeration circuit components such as compressors, and iron powder generated by initial wear of compressor sliding parts However, it is mixed with refrigerant or oil and circulates in the refrigeration circuit. The refrigerant or oil containing iron powder or the like flows into the gas-liquid separator main body 1, but most of the iron powder or the like can be adsorbed and captured by magnetic attraction when passing through the mesh 10 and the spherical permanent magnet 11. .

In the case where the mesh 10 and the spherical permanent magnet 11 are not adsorbed, a part of the iron powder, etc., is superheated particularly during the cooling operation, and the inside of the gas-liquid separator main body 1 is only oil and the liquid level is low. , Contained in oil,
When the liquid level passes through the mesh 10 and the spherical permanent magnet 11 due to a change in operating conditions, the liquid is reliably attracted and absorbed by the magnetic attraction.
Can be collected.

Further, it goes without saying that iron powder and the like flowing out from the oil return hole 7 can be attracted and collected by the mesh 10 and the spherical permanent magnet 11 immediately below the oil return hole 7.

As described above, in the gas-liquid separator of the present embodiment, the oil return hole 7 provided in the refrigerant outlet pipe 6 and the bottom surface of the gas-liquid separator main body 1 in the gas-liquid separator main body 1. The upper and lower two meshes 10 having the same size as the inner diameter of the gas-liquid separator main body 1 are installed on the wall surface of the lower end plate 4 corresponding to the space therebetween.
Since the spherical permanent magnets 11 are arranged so as to be in contact with the mesh 10 and be uniformly distributed therebetween, most of the iron powder and the like contained in the refrigerant and oil and flowing into the gas-liquid separator main body 1 are: When passing through the mesh 10 and the spherical permanent magnet 11, it is adsorbed and captured. In the case where the superheat is removed during the cooling operation and the inside of the gas-liquid separator body 1 is only oil and the liquid level is low, some iron powders which are not adsorbed by the mesh 10 or the spherical permanent magnet 11 and float in the oil, etc. Is attracted and captured by magnetic attraction when the oil level goes up and down the mesh 10 and the spherical permanent magnet 11. Further, iron powder or the like which is likely to flow out of the oil return hole 7 also
The magnetic attraction force of the mesh 10 and the spherical permanent magnet 11 immediately below attracts and collects reliably, preventing intrusion into the compressor and preventing abrasion of sliding parts of the compressor.

(Embodiment 4) FIG. 5 is a sectional view of a gas-liquid separator according to Embodiment 4 of the present invention. The same components as those in the first and third embodiments are denoted by the same reference numerals, and detailed description is omitted.

In the present embodiment, the end of the refrigerant outlet pipe 6 and the oil return hole 7 in the gas-liquid separator main body 1 according to the third embodiment.
Mesh 10 having the same size as the inner diameter of the gas-liquid separator main body 1 and through which the refrigerant outlet pipe 6 passes
Are installed in the upper and lower portions, and between the meshes 10, the spherical permanent magnets 11 are installed so as to be in contact with the mesh 10 and to be evenly distributed. , Two upper and lower meshes 10 and a spherical permanent magnet 11.

The operation of the gas-liquid separator configured as described above will be described below. Iron powder and iron cutting powder left inside during the cooling operation of refrigeration circuits such as air conditioners, during the production of refrigeration circuit components such as compressors, and iron powder generated by the initial wear of sliding parts of compressors And the like are mixed in the refrigerant or oil and circulate in the refrigeration circuit. The refrigerant or oil containing iron powder or the like flows into the gas-liquid separator main body 1, but the iron powder or the like flows into the upper and lower two-stage mesh 1 installed in the gas-liquid separator main body 1.
When passing through the spherical permanent magnet 11, most can be more reliably attracted and captured by the magnetic attraction force.

Further, when the liquid refrigerant easily flows into the gas-liquid separator main body 1 during the heating operation and the liquid level rises, the upper and lower meshes 10 and the spherical permanent magnets 11 do not attract the liquid refrigerant. Some of the iron powder is suspended and contained in the liquid refrigerant and oil stored in the gas-liquid separator main body 1. However, due to changes in operating conditions, the liquid refrigerant and iron powder and the like floating in the oil may have a liquid surface of an upper mesh 10 or a spherical permanent magnet 1.
1 can be adsorbed and captured by magnetic attraction when moving up and down.

Further, it goes without saying that iron powder and the like flowing out from the oil return hole 7 can also be adsorbed and collected by the lower mesh 10 and the spherical permanent magnet 11.

As described above, the gas-liquid separator according to the present invention has a body corresponding to the space between the end of the refrigerant outlet pipe 6 and the oil return hole 7 in the gas-liquid separator main body 1 according to the third aspect of the present invention. 2 On the wall surface, a refrigerant outlet pipe 6 of the same size as the inner diameter of the gas-liquid separator body 1
The upper and lower two meshes 10 are installed so that the spherical permanent magnets 11 are arranged between the meshes 10 so as to be in contact with the meshes 10 and to be evenly distributed. The iron powder and the like flowing into the gas-liquid separator main body 1 are more reliably adsorbed and captured when passing through the upper and lower meshes 10 and the spherical permanent magnets 11. When the liquid refrigerant flows together with the oil during the heating operation and the liquid level rises, the liquid surface of the liquid refrigerant or the iron powder or the like floating in the oil without being adsorbed by the upper and lower meshes 10 and the spherical permanent magnets 11 has the liquid level. Upper mesh 10 and spherical permanent magnet 11
When moving up and down, the mesh 10 and the spherical permanent magnet 1
It is adsorbed and captured by the magnetic attraction force. Further, the iron powder or the like which is likely to flow out from the oil return hole 7 is surely attracted and collected by the magnetic attraction force of the lower mesh 10 and the spherical permanent magnet 11 to prevent the powder from entering the compressor. Acceleration of wear of the sliding parts can be prevented.

[0046]

As described above, according to the first aspect of the present invention, in the gas-liquid separator main body, the lower portion of the gas-liquid separator main body just below the oil return hole provided in the refrigerant outlet pipe. A permanent magnet is provided on the head plate, and even when iron powder or the like contained in refrigerant or oil flows into the gas-liquid separator body during the operation of the refrigeration circuit and attempts to flow out of the oil return hole, the oil is returned. Due to the magnetic attraction of the permanent magnet installed immediately below the hole, iron powder and the like approaching the oil return hole can be surely adsorbed and collected, thereby preventing abrasion of sliding parts of the compressor.

The invention according to claim 2 of the present invention provides
In the main body of the gas-liquid separator, the central part of the bottom surface of the main body of the gas-liquid separator just below the oil return hole provided in the refrigerant outlet pipe is raised in the direction of the oil return hole, thereby forming the gas-liquid separator. In the modified lower end plate in which a circumferential V-shaped groove is formed on the bottom surface of the main body, permanent magnets are provided at the apex of the raised portion and the V-shaped groove, respectively. Even if iron powder or the like contained in the oil flows in and tries to flow out of the oil return hole, the iron powder approaching the oil return hole by the magnetic attraction force of the permanent magnet installed at the top of the ridge just below the oil return hole When the refrigeration circuit is stopped, iron powder and the like contained in the liquid refrigerant and oil sink to the bottom of the main body of the gas-liquid separator due to gravity. Is V on the circumference
Since the deformed lower end plate with the mold groove is installed, the sinking iron powder etc. concentrates on the V-shaped groove, and the accumulated iron powder etc. is collected by the magnetic attraction of the permanent magnet installed in the V-shaped groove. Adsorption and collection are surely performed, and it is possible to prevent accelerated wear of sliding parts of the compressor.

Further, the invention according to claim 3 of the present invention provides:
In the gas-liquid separator main body, an oil return hole provided in the refrigerant outlet pipe, and a lower end wall surface corresponding to between the gas-liquid separator main body bottom surface, a mesh of the same size as the gas-liquid separator main body inner diameter. The upper and lower two pieces are installed, and the spherical permanent magnets are installed between the meshes so as to be in contact with the meshes and to be evenly distributed. The iron powder, etc., flowing into the separator main body is adsorbed and captured when passing through the mesh or the spherical permanent magnet. Also, when the superheat is removed during the cooling operation and the gas-liquid separator main body becomes only oil, Iron powder, which is not attracted by the mesh or spherical permanent magnet and floats in the oil, is attracted and captured by the magnetic attraction of the mesh or spherical permanent magnet when the oil level goes up and down the mesh or spherical permanent magnet. ,Also In addition, iron powder and the like flowing out of the oil return hole are surely attracted and collected by the magnetic attraction of the mesh and the spherical permanent magnet immediately below the oil return hole to prevent entry into the compressor and slide the compressor. Acceleration of wear of parts can be prevented.

The invention according to claim 4 of the present invention provides
In the gas-liquid separator main body according to the third aspect of the present invention, the refrigerant outlet pipe has the same size as the inner diameter of the gas-liquid separator main body and penetrates through the body wall corresponding to the space between the end of the refrigerant outlet pipe and the oil return hole. The upper and lower two meshes are arranged such that spherical permanent magnets are in contact with the mesh and are uniformly distributed between the meshes. The mesh in this portion is also magnetized by the magnetic force of the spherical permanent magnet. Since iron powder and the like contained in the refrigerant and oil and flowing into the gas-liquid separator main body pass through these upper and lower meshes and spherical permanent magnets, they are more reliably adsorbed and collected. When the liquid refrigerant flows together with oil during heating operation and the liquid level rises, the liquid surface of the liquid refrigerant or iron powder that is not adsorbed by the upper and lower meshes or the spherical permanent magnets and floats in the oil is the upper surface of the mesh. And the spherical permanent magnet part At the time of lowering, the magnetic attraction force of the mesh or the spherical permanent magnet attracts and is trapped by the magnetic attraction force of the mesh or the spherical permanent magnet. Thus, the suction and collection can be surely performed, and the intrusion into the compressor can be prevented, and the wear of the sliding parts of the compressor can be prevented from being promoted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a gas-liquid separator according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a gas-liquid separator according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a gas-liquid separator according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a gas-liquid separator according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a conventional gas-liquid separator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas-liquid separator main body 2 Body 4 Lower end plate 6 Refrigerant outlet pipe 7 Oil return hole 8 Permanent magnet 9 Deformed lower end plate 10 Mesh 11 Spherical permanent magnet

Claims (4)

[Claims] 1. A gas-liquid separator, wherein a permanent magnet is provided in a lower end plate of the gas-liquid separator main body immediately below an oil return hole provided in a refrigerant outlet pipe in the gas-liquid separator main body. Separator. 2. In the main body of the gas-liquid separator, a central portion of the bottom surface of the main body of the gas-liquid separator just below an oil return hole provided in the refrigerant outlet pipe is raised in the direction of the oil return hole. A gas-liquid separator, wherein a permanent magnet is provided at each of the apex of the raised portion and the V-shaped groove in the deformed lower end plate having a circular V-shaped groove formed on the bottom surface of the gas-liquid separator main body. 3. The gas-liquid separator body inner diameter is provided in a lower end plate wall corresponding to an oil return hole provided in a refrigerant outlet pipe and the gas-liquid separator body bottom in the gas-liquid separator body. A gas-liquid separator characterized in that two upper and lower meshes of the same size are installed, and between the meshes, spherical permanent magnets are installed so as to be in contact with the meshes and to be evenly distributed. 4. In the main body of the gas-liquid separator, the refrigerant outlet pipe has the same size as the inner diameter of the main body of the gas-liquid separator and penetrates the wall of the body corresponding to the end of the refrigerant outlet pipe and the oil return hole. The gas-liquid separator according to claim 3, wherein two upper and lower meshes are provided, and between the meshes, spherical permanent magnets are provided so as to be in contact with the meshes and to be uniformly distributed.