KR20070087427A - Reciprocating compressor with anti-noise structure - Google Patents

Abstract

A reciprocating compressor with noise reduction structure is provided to prevent refrigerant gas leakage to a gap between a piston and a silencer, to prevent abrasion between the piston and the silencer, and to effectively reduce noise due to a plurality of space parts by installing an isolation member between the silencer and the piston so as to form the plurality of the space parts. A reciprocating compressor with noise reduction structure comprises a silencer(110) and an isolation member(120). The silencer is installed between a suction pipe(DP) and a piston(6) so as to reduce noise generated in a cylinder(3) and the piston. The isolation member is installed between the silencer and the piston so as to form a plurality of space parts. The isolation member is integrally formed with an outer circumferential surface of the silencer.

Description

Reciprocating compressor with noise reduction structure {RECIPROCATING COMPRESSOR WITH ANTI-NOISE STRUCTURE}

Figure 1 is a longitudinal sectional view showing a conventional reciprocating compressor

2 is a longitudinal sectional view showing a reciprocating compressor having a noise reduction structure according to a first embodiment of the present invention;

Figure 3 is an enlarged view of the main portion excerpt of Figure 2

4 is a perspective view showing a blocking member in a reciprocating compressor having a noise reduction structure according to a first embodiment of the present invention;

5 is a longitudinal sectional view showing a reciprocating compressor having a noise reduction structure according to a second embodiment of the present invention;

Figure 6 is an enlarged view of the main portion excerpt of Figure 5

7 is a perspective view showing a blocking member in a reciprocating compressor having a noise reduction structure according to a second embodiment of the present invention;

* Description of the main parts *

110,210: Silencer G1, G2: Gap

120,220: blocking member 121,221: body part

122,222: hole part 123,223: diaphragm part

The present invention relates to a reciprocating compressor, and more particularly, to a reciprocating compressor having a noise reduction structure capable of efficiently reducing noise.

Generally, a compressor is a device that compresses a fluid such as air or refrigerant gas.

The reciprocating compressor includes an electric mechanism part provided inside the casing to generate a driving force, and a compressor mechanism part for receiving and compressing refrigerant gas by receiving the driving force of the electric mechanism part.

When the driving force is generated in the transmission mechanism by the applied power source, the reciprocating compressor transmits the driving force to the compression mechanism. At this time, the compression mechanism unit sucks, compresses and discharges the gas.

1 is a longitudinal sectional view showing a conventional reciprocating compressor.

As shown in the drawing, the conventional reciprocating compressor 10 includes a suction pipe SP into which refrigerant gas is introduced and a casing V having a discharge pipe DP through which refrigerant gas is discharged.

An inner casing 1 is installed inside the casing V, and a cylindrical back cover 2 is fixedly installed on one side of the inner casing 1, and a transverse direction is formed in the center of the inner casing 1. The cylinder 3 is formed.

The piston 6 which sucks and compresses the refrigerant gas while sliding inside the cylinder 3 is operated by the reciprocating motor 5, and the reciprocating motors 5 are spaced apart from each other. It is installed between the outer stator 5a, the inner stator 5b, and the outer stator 5a and the inner stator 5b fixed to the back cover 2 and connected to the piston 6 to connect the piston 6 It consists of the movable body 5c which reciprocates.

A discharge valve assembly is provided adjacent to the piston 6 to induce a resonant motion, and a discharge valve assembly for restricting the discharge of the refrigerant gas during the reciprocating motion of the piston 6 at the distal end of the cylinder 3 ( 8) is installed. A suction valve 8a for restricting suction of refrigerant gas is provided on the front surface of the piston 6.

In addition, to guide the refrigerant gas sucked into the suction pipe (DP) to flow directly into the refrigerant flow path of the piston (6) and to prevent the noise generated from the cylinder (3) and the piston (6) side to escape to the outside. A silencer 9 is provided between the suction pipe DP and the piston 6. A sealing member 9a is provided in the gap Gap between the silencer 9 and the piston 6.

The conventional reciprocating compressor as described above is operated as follows.

When a current is applied to the reciprocating motor 5 and the mover 5a linearly reciprocates, the piston 6 coupled to the mover 5a reciprocates in the cylinder 3 in a straight line. At this time, a pressure difference is generated inside the cylinder 3, and the refrigerant gas in the casing V is caused to flow through the refrigerant passage F of the piston 6 by the pressure difference. Inhaled by P). The refrigerant gas sucked into the compression chamber P is repeated a series of processes discharged to the outside of the casing (V) by the suction valve (8a), the discharge valve assembly (8).

In the process of linearly reciprocating the piston 6 inside the cylinder 3, the refrigerant gas introduced into the suction pipe DP flows directly into the refrigerant passage F through the silencer 9, where the piston 6 and the cylinder The noise generated in (3) is reduced by the muffler (9). The sealing member 9a serves to prevent the refrigerant gas introduced into the refrigerant passage of the piston 6 from leaking into the gap between the piston 6 and the silencer 9.

However, such a conventional reciprocating compressor has a problem that deformation of the silencer occurs due to friction generated between the sealing member and the silencer during the reciprocating motion of the piston, and thus high temperature heat, and even the silencer is broken.

In order to solve such a problem, the conventional method of maintaining a large gap between the sealing member and the silencer was used, but in this case, there was a problem that noise leaked through the gap.

The present invention has been made in view of the above-described problems, it is possible to form a plurality of spaces between the inner peripheral surface of the piston and the outer peripheral surface of the silencer, through the space portion can effectively reduce the noise, improve the opening of the intake valve It is an object of the present invention to provide a reciprocating compressor having a noise reduction.

The present invention to achieve the above object is a silencer provided between the suction pipe and the piston to reduce the noise generated in the cylinder and the piston side; Provided is a reciprocating compressor having a noise reduction structure including a blocking member disposed between a silencer and a piston to form a plurality of space portions.

The blocking member may be formed in a structure separated from the silencer, or may be formed in an integrated structure, in the case of the separating structure, the blocking member may include a cylindrical body part in close contact with an inner circumferential surface of the cylinder; A hole portion formed at the center of the body portion to insert the silencer; The diaphragm portion extends from the inner circumferential surface of the body portion toward the hole portion.

In the case of the integral structure, the blocking member is formed on the outer circumferential surface of the blocking member toward the inner circumferential surface of the piston, and the diaphragm portion extends toward the inner circumferential surface of the piston. It is desirable to.

Preferably, the plurality of space portions are formed to increase gradually from the discharge side of the refrigerant gas to the suction side.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the reciprocating compressor of the noise prevention structure according to the present invention.

2 is a longitudinal sectional view showing a reciprocating compressor having a noise reduction structure according to a first embodiment of the present invention, FIG. 3 is an enlarged view of an excerpt of FIG. 2, and FIG. 4 is a noise according to a first embodiment of the present invention. A perspective view showing a blocking member in a reciprocating compressor having a reduced structure.

As shown in the drawing, the reciprocating compressor 100 having the noise reduction structure according to the first embodiment of the present invention has a suction pipe SP into which refrigerant gas is introduced into one side and a discharge pipe DP through which refrigerant gas is discharged into the other side. It has a casing (V) formed.

An inner casing 1 is installed inside the casing V, and a cylindrical back cover 2 is fixedly installed on one side of the inner casing 1 in a transverse direction at the center of the inner casing 1. The cylinder 3 is formed.

The piston 6 which sucks and compresses the refrigerant gas while sliding inside the cylinder 3 is operated by the reciprocating motor 5, and the reciprocating motor 5 has a back cover at a predetermined interval from each other. (2) is fixedly installed between the outer stator (5a), the inner stator (5b), the outer stator (5a), the inner stator (5b) and connected to the piston (6) to reciprocate the piston (6) It consists of the mover 5c which makes a movement.

A resonant spring 7 is provided adjacent to the piston 6 to induce a resonant motion, and the discharge valve assembly restricts the discharge of the refrigerant gas during the reciprocating motion of the piston 6 at the distal end of the cylinder 3. (8) is installed. A suction valve 8a for restricting suction of refrigerant gas is provided on the front surface of the piston 6.

In addition, in order to guide the refrigerant gas sucked into the suction pipe (DP) to flow directly into the refrigerant passage of the piston (6) and to prevent noise generated at the cylinder (3) and the piston (6) side from escaping to the outside. A silencer 110 is provided between the suction pipe DP and the piston 6. A blocking member 120 is provided between the silencer 110 and the piston 6.

In the reciprocating compressor 100 having a noise reduction structure according to the first embodiment of the present invention, a blocking member 120 is formed to form a plurality of spaces 124 between the silencer 110 and the piston 6. The blocking member 120 is installed separately from the silencer 110.

The blocking member 120 has a cylindrical body portion 121 in close contact with the inner peripheral surface of the cylinder (3); A hole portion 122 formed at the center of the body portion 121 so that the silencer 110 is inserted; The diaphragm portion 123 extends from the inner circumferential surface of the body portion 121 toward the hole portion 122.

The gap G1 formed between the end of the diaphragm 123 and the outer circumferential surface of the muffler 110 may minimize friction between the blocking member 120 and the muffler 110 and reduce noise effectively. It is desirable to keep it at 2 mm.

The plurality of space portions 124 formed by the diaphragm portions 123 may be formed to gradually increase from the discharge side of the refrigerant gas toward the suction side.

The reciprocating compressor of the noise reduction structure according to the first embodiment of the present invention configured as described above operates as follows.

When a current is applied to the reciprocating motor 5 and the mover 5a linearly reciprocates, the piston 6 coupled to the mover 5a reciprocates linearly inside the cylinder 3. At this time, a pressure difference is generated inside the cylinder 3, and the refrigerant gas in the casing V is caused to flow through the refrigerant passage F of the piston 6 by the pressure difference. Inhaled by P). The refrigerant gas sucked into the compression chamber P is repeated a series of processes discharged to the outside of the casing (V) by the suction valve (8a), the discharge valve assembly (8).

At this time, the refrigerant gas introduced into the suction pipe DP during the linear reciprocation of the piston 6 in the cylinder 3 flows directly into the refrigerant passage F through the silencer 110, and at this time, the cylinder 3. And noise generated at the piston side is reduced by the silencer 110.

Here, the blocking member 120 serves to prevent the refrigerant gas introduced into the refrigerant passage of the piston 6 from leaking into the gap between the piston 6 and the silencer 110 while reciprocating with the piston 6. In addition, it prevents the friction between the silencer 110 and the piston 6, and serves to reduce the noise more effectively due to the plurality of spaces 124.

On the other hand, Figure 5 is a longitudinal sectional view showing a reciprocating compressor having a noise reduction structure according to a second embodiment of the present invention, Figure 6 is an enlarged view of the main portion of Figure 5, Figure 7 is a second embodiment of the present invention It is a perspective view showing a blocking member in the reciprocating compressor of the noise reduction structure according to the above.

As shown in FIG. 2, the reciprocating compressor 200 having the noise reduction structure according to the second embodiment has a casing having a suction pipe SP into which refrigerant gas is introduced and a discharge pipe DP through which refrigerant gas is discharged. (V) is provided.

An inner casing 1 is installed inside the casing V, and a cylindrical back cover 2 is fixed to one side of the inner casing 1, and a cylinder ( 3) is formed.

The piston 6 which sucks and compresses the refrigerant gas while sliding inside the cylinder 3 is operated by the reciprocating motor 5, and the reciprocating motor 5 has a back cover at a predetermined interval from each other. (2) is fixed between the outer stator (5a), the inner stator (5b), the outer stator (5a) and the inner stator (5b) is installed and connected to the piston (6) to reciprocate the piston (6) It consists of the mover 5c.

A resonant spring 7 is provided adjacent to the piston 6 to induce a resonant motion, and the discharge valve assembly restricts the discharge of the refrigerant gas during the reciprocating motion of the piston 6 on the discharge side of the cylinder 3. (8) is installed. A suction valve 8a for restricting suction of refrigerant gas is provided on the front surface of the piston 6.

In addition, the refrigerant gas sucked into the suction pipe (DP) is guided to flow directly into the refrigerant flow path (F) of the piston (6) and the noise generated from the cylinder (3) and the piston (6) side can escape to the outside. In order to prevent the silencer 210 is installed between the suction pipe DP and the piston 6. A blocking member 220 is provided between the silencer 210 and the piston 6.

In the reciprocating compressor 200 having a noise reduction structure according to the second embodiment of the present invention, a blocking member 220 is formed to form a plurality of space portions 124 between the silencer 210 and the piston 6. The blocking member 220 is integrally formed with the silencer 210.

Looking at the structure of the blocking member 220, the diaphragm 223 is formed along the outer circumferential surface of the body portion 221, the hole portion 222 is inserted into the silencer 210 in the center of the body portion 221 ) Is formed. Here, the gap G2 between the end of the diaphragm portion 223 and the inner circumferential surface of the piston 6 may minimize the friction between the blocking member 220 and the silencer 210 and reduce noise effectively. It is desirable to keep it at -2 mm.

A plurality of space portions 224 are formed between the diaphragm portions 223, and the space portions 224 are formed to gradually increase from the discharge side of the refrigerant gas to the suction side so as to improve the compressibility of the refrigerant gas. desirable.

The reciprocating compressor of the noise reduction structure according to the second embodiment of the present invention configured as described above is operated as follows.

When a current is applied to the reciprocating motor 5 and the mover 5a linearly reciprocates, the piston 6 coupled to the mover 5a reciprocates linearly inside the cylinder 3. At this time, a pressure difference is generated inside the cylinder 3, and the pressure difference causes the refrigerant gas inside the casing V to flow into the compression chamber P of the cylinder 3 through the refrigerant flow path F of the piston 6. Is inhaled.

The refrigerant gas sucked into the compression chamber P is repeated a series of processes discharged to the outside of the casing (V) by the suction valve (8a), the discharge valve assembly (8).

At this time, the refrigerant gas introduced into the suction pipe DP during the linear reciprocation of the piston 6 inside the cylinder 3 flows directly into the refrigerant passage F through the silencer 210, and at this time, the cylinder 3. And noise generated by the piston 6 is reduced by the silencer 210.

Here, unlike the blocking member 120 shown in the first embodiment, the blocking member 220 is fixed to the outer circumferential surface of the silencer 210 instead of reciprocating with the piston 6.

Therefore, the blocking member 220 not only serves to prevent the refrigerant gas introduced into the refrigerant passage of the piston 6 from leaking into the gap between the piston 6 and the silencer 110, and also suppresses the silencer 210 and the piston ( 6) to prevent friction with, and to reduce the noise more effectively due to the plurality of spaces 224, as well as the piston (6) when the reverse in the reciprocating process, Compresses the refrigerant gas serves to improve the opening of the intake valve (8a).

On the other hand, although not shown in the figure, a structure in which a plurality of diaphragm portions are integrally injection molded on the outer circumferential surface of the muffler and a space portion is formed by the diaphragm portions is also possible. In such a structure, since the injection molding is integrally formed on the outer circumferential surface of the muffler, a separate blocking member is not required. Accordingly, the manufacturing cost can be reduced and the opening of the suction valve can be efficiently improved while reducing the manufacturing cost.

As described above, the present invention not only serves to prevent the refrigerant gas from leaking into the gap between the piston and the silencer, but also prevents friction between the silencer and the piston and reduces noise more effectively due to a large number of spaces. Can be.

In addition, the piston may further improve the opening of the intake valve by compressing the refrigerant gas when the piston reverses in the reciprocating process.

Claims (4)

A silencer installed between the suction pipe and the piston to reduce noise generated at the cylinder and the piston side; A reciprocating compressor having a noise reduction structure including a blocking member disposed between the silencer and the piston to form a plurality of space parts. The method of claim 1, The blocking member has a cylindrical body portion in close contact with the inner peripheral surface of the cylinder; A hole portion formed at the center of the body portion to insert the silencer; And a diaphragm portion extending toward the hole portion from the inner circumferential surface of the body portion. The method according to claim 1 or 2, The blocking member is a reciprocating compressor having a noise reduction structure, characterized in that formed integrally with the outer peripheral surface of the silencer. The method of claim 1, The plurality of space portion is a reciprocating compressor having a noise reduction structure characterized in that it is gradually formed from the discharge side of the refrigerant gas toward the suction side.

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