KR20090041666A - Linear compressor - Google Patents

Abstract

A linear compressor is provided to prevent abrasion and damage to a part due to the inflow of impurities generated in an apparatus on cooling cycle by preventing the impurities from being flowed into a compression assembly of the linear compressor. A linear compressor comprises a mesh(170) installed between a suction pipe(100) and a piston(140). The mesh is weld in the inner surface of a sealed container(120) to prevent impurities from being flowed in a piston. The mesh surrounds a refrigerant intake hole(110) of the sealed container.

Description

Linear Compressor {LINEAR COMPRESSOR}

The present invention relates to a linear compressor. More particularly, the present invention relates to a linear compressor having a mesh in a refrigerant suction unit.

In general, a compressor is a mechanical device that increases pressure by receiving power from a power generator such as an electric motor or a turbine and compresses air, refrigerant, or other various working gases. It is widely used throughout.

These compressors are classified into a reciprocating compressor which compresses the refrigerant while the piston reciprocates linearly in the cylinder by forming a compression space in which the working gas is absorbed and discharged between the piston and the cylinder. And a rotary compressor for compressing the refrigerant while the roller is eccentrically rotated along the inner wall of the cylinder to form a compression space in which the working gas is sucked and discharged between the eccentrically rotating roller and the cylinder. As a scroll compressor that compresses the refrigerant while the rotating scroll rotates along the fixed scroll to form a compression space in which the working gas is absorbed and discharged between the orbiting scroll and the fixed scroll. Divided.

Recently, among the reciprocating compressors, in particular, a piston is directly connected to a reciprocating linear drive motor, thereby improving compression efficiency without mechanical loss due to motion conversion, and linear compressors having a simple structure have been developed.

Usually, the linear compressor is configured to suck and compress the refrigerant, and then discharge the refrigerant while the piston is moved reciprocally linearly in the cylinder by the linear motor inside the sealed container, wherein the linear motor is a permanent magnet between the inner stator and the outer stator. The permanent magnet is driven to linearly reciprocate by mutual electromagnetic force, and the piston is reciprocated linearly in the cylinder as the permanent magnet is driven in a state connected to the piston, thereby changing the pressure in the compression space. The pressure is introduced into the compression space between the piston and the cylinder by the pressure difference. At this time, while the refrigerant passes through the suction muffler, the flow noise is reduced. The refrigerant introduced into the compression space is compressed by the piston and then discharged to the outside when the valve is opened above a predetermined pressure.

1 is a view illustrating an example of a conventional linear compressor, in which a refrigerant is sucked into a suction hole of a suction muffler 3 from a suction pipe 1 attached to a sealed container 2. The piston (4) inside the sealed container (2) by the linear motor (6) sucks the refrigerant during the reciprocating linear motion inside the cylinder (5), compresses and discharges. After the refrigerant is discharged, the refrigerant is heat-exchanged with the outside air to vaporize and thus absorbs the surrounding heat, thereby cooling the surroundings. The heat-exchanged refrigerant is recovered by the linear compressor and is repeated again. This is called a refrigeration cycle. At this time, the refrigerant flows into the suction pipe 1 from the refrigerating cycle, and the refrigerant is sucked into the compression space between the piston 4 and the cylinder 5 along the suction muffler 3.

As shown in Figure 1, the refrigerant flows into the suction pipe (1) of the linear compressor from the refrigerator. Along the refrigeration cycle, foreign substances such as aluminum, copper, etc., are introduced into the compressor as refrigerant, which passes through the suction pipe 1 and the suction muffler 3 through the piston interior 4 and the valve 12 system. It may flow into the discharge part 6 in some cases.

In addition, as the piston 4 in the sealed container 2 reciprocates linearly, the pressure inside the compression space is variable, and the refrigerant is compressed through the suction pipe 1 and the suction muffler 3 by the pressure difference. Flows into space. As the refrigerant flows, even when noise is generated, the noise is reduced by rapidly expanding or contracting through the internal noise pipe of the suction muffler 3 or by increasing the flow resistance of the refrigerant. The refrigerant introduced into the compression space between the cylinders 4 of the piston 4 through the piston 4 is compressed by the piston 4 and then discharged to the outside. At this time, when foreign matter suspended in the refrigerant flows into the compressor together with the refrigerant, the foreign matter may damage the valve 12 and wear the discharge part 6. In addition, breakage of the valve 12 and wear of the discharge part 6 cause leakage of the refrigerant through the discharge part 6. If the refrigerant leaks, not only the efficiency of the compressor is lowered, but also the refrigerant cannot be compressed to the desired pressure.

For example, when the refrigerant flows into the sealed container 2 from the refrigeration cycle, foreign substances such as aluminum and copper in the evaporator and the pipe are mixed with the refrigerant and introduced into the sealed container 2. At this time, since the foreign matter moves together with the refrigerant along the refrigerating cycle, this causes the leakage of the refrigerant through the discharge part 6 together with damage to the valve 12 and wear of the discharge part 6 and the sealed container 2. Break the parts inside.

An object of the present invention is to provide a linear compressor for preventing the inflow of foreign substances flowing from the refrigerator cycle through the suction pipe of the linear compressor.

The present invention provides a sealed container filled with a refrigerant, a fixed part including a cylinder located in the sealed container and providing a space in which the refrigerant is compressed, a driving part including a piston for reciprocating linear movement in the cylinder and compressing the refrigerant, and driving the driving part. A linear motor including an inner stator, an outer stator and a permanent magnet, a suction pipe connected to one side of the sealed container, a suction pipe for introducing refrigerant into the sealed container, and a mesh between the suction pipe and the piston to block foreign matter from entering the piston It provides a linear compressor comprising a.

In another aspect of the present invention, there is also provided a linear compressor, wherein the mesh covers the suction pipe outlet.

In another aspect of the present invention, there is provided a linear compressor characterized by being welded to an inner surface of a sealed container.

In addition, another aspect of the present invention, the linear compressor comprising a suction muffler located on one side of the piston to reduce the noise when the refrigerant is sucked into the piston, the mesh is installed inside the suction muffler to provide.

In another aspect of the present invention, there is also provided a linear compressor characterized in that the mesh is caulked inside the suction muffler.

In addition, in another aspect of the present invention, the linear compressor further comprises a suction muffler located on one side of the piston to reduce noise when the refrigerant is sucked into the piston, the mesh is welded outside the suction muffler. to provide.

The linear compressor provided by the present invention can prevent foreign substances generated in the apparatus on the refrigeration cycle from entering the compression assembly of the linear compressor.

In addition, the linear compressor provided by the present invention can prevent wear and breakage of components due to the inflow of metallic foreign matter.

In addition, the linear compressor provided by the present invention can prevent breakage and wear of the valve due to foreign matter suspended in the refrigerant.

In addition, the linear compressor provided by the present invention can prevent the leakage of the refrigerant caused by the breakage and wear of the valve.

In addition, the linear compressor provided by the present invention can improve the life and reliability of the parts, and can prevent the deterioration of the compression efficiency due to the life of the linear compressor.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a view showing a linear compressor according to a first embodiment of the present invention, the linear compressor according to an embodiment of the present invention is located in the sealed container 120 and the sealed container 120 filled with the refrigerant, A driving part including a fixed part including a cylinder 150 providing a space in which the refrigerant is compressed, a piston 140 reciprocating linearly in the cylinder 150 to compress the refrigerant, and an inner stator 190 driving the driving part. ), A linear motor 160 including an outer stator 180 and a permanent magnet 200, connected to one side of the sealed container 120, a suction pipe 100 for introducing a refrigerant into the sealed container 120, and suction It is installed between the pipe 100 and the piston 140 and includes a mesh 170 to block foreign matter from being introduced into the piston 140.

The refrigerant flows into the sealed container 120 through the suction pipe 100, and the inside of the sealed container 120 is operated in a state filled with the refrigerant. The piston 140 sucks and compresses the refrigerant filled in the sealed container 120 while reciprocating linearly inside the cylinder 150, and then discharges it through the discharge unit 160. The suction pipe 100 is inserted into the refrigerant suction hole 110 formed in the hermetic container 120. At this time, when the refrigerant flows through the refrigerant suction hole 110 through which the suction pipe 100 is inserted, the mesh 170 filters foreign matter suspended in the refrigerant. The mesh 170 may have a hemispherical shape that completely surrounds the refrigerant suction hole 110 and its surroundings, a cylindrical shape having one surface open, and a box shape having one surface open. If the mesh 170 has such a shape, foreign matter may be collected in the mesh 170.

In addition, the mesh 170 is located between the refrigerant suction hole 110 and the suction muffler 130 and has a surface for filtering foreign matter, and has a fixing portion or a fixed surface for fixing the surface for filtering foreign matter, and refrigerant suction. It may have a form that does not completely surround the hole 110. At this time, the foreign matter is blocked by the inlet to the suction muffler 130 and the piston 140 by the surface filtering the foreign matter, and falls to the lower portion of the sealed container 120 by gravity. Since the foreign matter is denser than the refrigerant, it collects in the lower portion of the sealed container 120 and does not flow into the suction muffler 130 and the piston 140.

The mesh 170 may be fastened by a bolt or the like, but the mesh 170 may be attached to the sealed container 120 in a manner that does not form a gap in order to prevent the refrigerant from flowing out through the gap formed in the sealed container 120. . For example, the mesh 170 may be fixed to the hermetically sealed container 120 by welding, soldering, or the like.

3 is a view showing a part of the linear compressor according to the second embodiment of the present invention, the mesh 170 is applied to the inlet of the suction muffler 130. The refrigerant flows into the external sound pipe 131 through the internal sound pipe 132 of the suction muffler 130 through the suction pipe 100 and the refrigerant suction hole 110. At this time, the mesh 170 is attached to the suction muffler 130. The mesh 170 is attached to the inside of the suction muffler 130 by welding or the like before the internal sound pipe 132 and the external sound pipe 131 are installed. After the mesh 170 is attached, the external sound pipe 131 and the internal sound pipe 132 are sequentially installed.

4 is a view showing a portion of the linear compressor according to the third embodiment of the present invention, the mesh 170 is attached to surround the inlet of the suction muffler 130 outside the suction muffler (130). The refrigerant introduced into the sealed container 120 through the suction pipe 100 and the refrigerant suction hole 110 is introduced by the mesh 170 installed at the inlet side of the suction muffler 130 before being introduced into the suction muffler 130. Foreign object is filtered out. Foreign matter filtered by the mesh 170 is collected in the lower portion of the sealed container 120 by gravity. Therefore, since foreign matters can be prevented from being introduced into the piston 140 through the suction muffler 130 together with the refrigerant, the foreign matters can be prevented from circulating in a refrigeration cycle with the refrigerant.

5 is a view showing a part of the linear compressor according to the fourth embodiment of the present invention. The mesh 170 is installed inside the suction muffler 130 and is installed by caulking on the inlet side of the suction muffler 130. As in the second embodiment, the mesh 170 is installed by the caulking in the suction muffler 130, and then the external sound pipe 131 and the internal sound pipe 132 are sequentially installed. When the mesh 170 is attached by caulking, shape deformation caused by heat when welding the mesh 170 or the suction muffler 130 does not occur.

As described above, a mesh may be applied to the outlet of the suction pipe 100 or the inlet of the suction muffler 130 positioned on the suction passage of the refrigerant to prevent the inflow of foreign substances generated in the refrigeration cycle. In addition, it is possible to prevent wear of the compressor parts due to foreign matter. In addition, breakage and wear of the discharge valve can be prevented, and leakage of the refrigerant due to breakage or wear of the discharge valve can be prevented. Therefore, the life and reliability of the linear compressor can be improved.

1 is a view showing an example of a conventional linear compressor,

2 shows a linear compressor according to a first embodiment of the present invention;

3 is a view showing a part of a linear compressor according to a second embodiment of the present invention;

4 is a view showing a part of a linear compressor according to a third embodiment of the present invention;

5 shows a part of a linear compressor according to a fourth embodiment of the present invention.

Claims (6)

An airtight container filled with a refrigerant; A fixed part located in the sealed container and including a cylinder providing a space in which the refrigerant is compressed; A drive unit including a piston for reciprocating the cylinder and compressing the refrigerant; A linear motor driving the driving unit, the linear motor including an inner stator, an outer stator, and a permanent magnet; A suction pipe connected to one side of the sealed container and introducing a refrigerant into the sealed container; And And a mesh installed between the suction pipe and the piston to block foreign matter from entering the piston. The method of claim 1, The mesh covers a suction pipe outlet. The method of claim 1, The mesh is welded to the inner surface of the hermetically sealed container. The method of claim 1, Located on one side of the piston, the suction muffler to reduce the noise when the refrigerant is sucked into the piston; includes; The mesh is installed inside the suction muffler. The method of claim 1, The mesh is caulked inside the suction muffler.  The method of claim 1, Located on one side of the piston, the suction muffler to reduce the noise when the refrigerant is sucked into the piston; further includes, The mesh is welded outside the suction muffler.

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