WO2011083901A1

WO2011083901A1 - Sealing-type reciprocating compressor

Info

Publication number: WO2011083901A1
Application number: PCT/KR2010/006154
Authority: WO
Inventors: 이한중; 이진주
Original assignee: Lee Han Jung; Lee Jin Joo
Priority date: 2010-01-05
Filing date: 2010-09-10
Publication date: 2011-07-14

Abstract

The present invention relates to a sealing-type reciprocating compressor, and more particularly, to a sealing-type reciprocating compressor which maximizes compressing efficiency, minimizes fluctuation during suction and compression, and is miniaturized. For this purpose, the sealing-type reciprocating compressor includes a compression compartment member, pistons, and a vertical moving member. The compression compartment member includes first and second compression compartments to alternately perform a suction operation and a compression operation, and is installed in an installation recess of a cylinder block. The pistons are inserted in the first and second compression compartments, respectively, to suction and compress refrigerant. The vertical moving member is disposed on an upper side of a rotation shaft that is rotated by a driving part, and converts the rotational motion into linear motion such that the pistons alternatingly move upward and downward.

Description

Hermetic reciprocating compressor

The present invention relates to a hermetic reciprocating compressor, and more particularly, to a hermetic reciprocating compressor which minimizes the volume while minimizing the pulsation occurring during suction and compression as well as increasing the compression efficiency as much as possible.

In general, a compressor is a device in which a refrigerant evaporated from an evaporator is compressed by suction to raise a pressure to liquefy at a relatively high temperature. The compressor is an open type in which a compressor and an electric motor are largely separated, and a compressor and an electric motor It is divided into a sealed type embedded in the container.

In addition, compressors are classified into reciprocating compressors, rotary compressors, scroll compressors, turbo compressors, screw compressors, and the like according to the compression method. Herein, the reciprocating compressors among the various compressors will be described.

The sealed reciprocating compressor 100 which sucks and compresses and discharges refrigerant into a conventional hermetically sealed space has a rotating shaft 130 which is rotated by the drive unit 120 inside the hermetic container 110 as shown in FIG. 10. A connecting rod 135 is installed at the top of the rotating rod to convert the rotational movement into a linear movement. A piston 136 connected to the connecting rod 135 is mounted on the cylinder block 150 mounted on the upper portion of the main body frame 140. The refrigerant is sucked and compressed while reciprocating in the formed compression chamber 152.

At this time, one side of the cylinder block 150 is coupled to the discharge muffler 160 is formed with a suction chamber and a discharge chamber communicating with the outside, respectively, between the compression chamber and the suction chamber and the discharge chamber is a low-temperature low-pressure refrigerant gas suction and high temperature A suction and discharge valve body 170 is provided to discharge the high pressure refrigerant gas.

The suction and discharge valve body 170 has a flapper or lead type thin plate structure having a general elasticity, and the flapper or lead type suction and discharge valve body 170 acts on both sides. It is opened and closed passively by the pressure difference.

The closed-type reciprocating compressor 100 configured as described above has an external evaporator (not shown) through a suction tube and a suction muffler not shown in the sealed container 110 in which the refrigerant gas of low temperature and low pressure during the backward motion of the piston 136 is moved. From the suction and discharge valve body 170 to the suction lead valve to the suction chamber of the discharge muffler 170 and then into the compression chamber 152.

In the forward movement of the piston 136, the high temperature and high pressure refrigerant gas discharged from the compressor is sealed in the sealed container through the discharge chamber and the discharge muffler 160 from the discharge valve of the suction and discharge valve body 170. It is discharged to an external condenser (not shown) via a fixed discharge tube.

However, in the conventional hermetic reciprocating compressor as described above, not only the starting noise is greatly generated when the piston is reciprocated through the connecting rod at the rotational axis during the initial operation, that is, when the rotational movement is converted into the linear reciprocating motion. In particular, the vibration noise caused by the pulsation phenomenon caused by the suction and compression periodically performed in the compression chamber was also severely generated.

In other words, the cycle width in which one piston sucks and compresses ten times in one compression chamber when the suction and compression is performed ten times is large, resulting in a large pulsation phenomenon resulting in a large vibration noise. .

In addition, as well as shortening the life due to friction between the portion in contact with the rotating shaft 130 and the connecting rod 135 and the compression chamber 152 of the piston 136 and the cylinder block 150, in particular, the rotational movement is straight In addition, there is also a problem that the impact noise that is converted to reciprocation, that is, a large amount of impact noise due to the change of direction.

Thus, in order to minimize the vibration noise caused by the pulsation phenomenon occurring during the suction and compression is performed periodically, as shown in Figure 11 the refrigerant gas on the upper surface of the main body frame 140 on both sides of the cylinder block 150 In order to reduce vibration noise by being connected to the suction and discharge parts, a method of forming the respective resonance chambers 180 is also used. However, the connection between the suction chamber and the discharge chamber and the respective resonance chambers is also connected by a separate connection pipe. As a result, each connection part has a problem such that cracks due to pressure, as well as the length of the pipe is also lengthened, the compression efficiency is considerably lowered, and the volume of the body frame is also significantly increased as the resonance chamber is formed.

On the other hand, Japanese Patent Application Laid-Open No. 19-187118 "Reciprocating Compressor" in order to minimize the impact noise caused by the starting noise or pulsation phenomenon and the change of direction generated in the process of converting the rotary motion of the hermetic reciprocating compressor into linear reciprocating motion. As proposed in FIG. 12, the compression method of the reciprocating compressor 200 as shown in FIG. 12 is a method of raising and lowering the piston 202, and the rotational force of the main shaft 210 is transmitted to the rotor 212. As the 212 is rotated, the inclination plate 214 hinged to the rotor 212 is also rotated, and the rocking plate 216 is coupled to the rocking plate while the rocking plate 216 swings left and right by the rotation of the inclined plate. The rod 218 is forced and linearly reciprocated by the swinging plate 216 to lift and lower the piston 202 to suck and compress it.

However, in this swinging method, a lot of interference between components occurs, and friction or shock occurs, thereby causing a problem that rotation at high speed is not achieved, and a linear reciprocating motion of the connecting rod is smoothly caused by swinging. It was an unsuitable problem to be made.

In addition, in order to reduce the pulsation phenomenon while having a higher compression efficiency in the prior art, as described in Japanese Patent Application Laid-open No. Hei 12-192882 "reciprocating compressor" is provided with two compression chambers instead of one compression chamber. Although a plurality of compression chambers and pistons are provided to increase the compression efficiency, the structure for raising and lowering the plurality of pistons is composed of the same components such as the inclined plate and the rocking plate and the connecting rod, such as the rocking type described above, In the rocking method described above, the piston had the problem of raising and lowering.

The present invention has been made to solve the above-mentioned conventional problems, and its main object is to provide a hermetic reciprocating compressor which can minimize the pulsation phenomenon occurring during suction and compression as well as to increase the compression efficiency as much as possible. .

Still another object of the present invention is to minimize the vibration noise generated during suction and compression by forming a path as long as possible upon suction or discharge of the refrigerant gas.

Still another object of the present invention is to minimize the frictional load during high speed operation to maximize the compression efficiency.

Another object of the present invention is to reduce the number of parts while minimizing the volume.

The present invention for solving the technical problem as described above, in the hermetic reciprocating compressor, the first and second compression chamber is formed so that the suction and compression can be alternately formed compression chamber member mounted to the mounting groove formed in the cylinder block Wow; Respective pistons inserted into the first and second compression chambers to suck and compress the refrigerant; Lifting and lowering means for converting the rotary motion to a linear motion on the top of the rotating shaft rotated by the drive unit to make the rise and fall of each piston alternately; It is characterized by including.

The raising and lowering means is composed of an inclined plate which is coupled to the rotating shaft and rotated in the lower portion of the cylinder chamber of the cylinder block, and a link link rotatably coupled to the cylinder chamber and both ends rotatably coupled to the rod of each piston. It features.

The connection link, the center is coupled to the cylinder chamber by a fixed pin, characterized in that both ends of the connection link is configured to be mounted in the insertion groove for receiving the end of the connection link to the rod of each piston.

The inclined surface of the inclined plate is characterized in that it is formed to form a horizontal plane radially from the center of rotation.

At the bottom of each rod in contact with the inclined surface of the inclined plate is characterized in that the rolling means for reducing the friction is further provided.

The cylinder block is characterized in that the suction chamber and the discharge chamber in which the refrigerant gas is sucked and discharged into the first and second compression chambers are integrally formed.

The suction chamber includes an inlet hole formed in the lower outer surface of the cylinder block, an inlet space connected to the inlet hole to circulate the refrigerant gas, and connected to the first and second compression chambers on the upper surface of the cylinder block through the inlet space. Characterized in that composed of a suction hole.

The discharge chamber includes a discharge hole connected to the first and second compression chambers on an upper surface of the cylinder block, a discharge space circulated through the discharged refrigerant gas connected to the discharge hole, and a lower portion of the outer surface of the cylinder block through the discharge space. Characterized in that consisting of the discharge hole formed in.

1 is a sectional view schematically showing a main part of a hermetic reciprocating compressor to which the present invention is applied.

2 is a schematic exploded perspective view of the main portion according to FIG.

3 is a cross-sectional view taken along the line A-A in the coupled state according to FIG.

4 is a sectional view taken along the line B-B in the coupled state according to FIG.

5 and 6 schematically show the operating state of the present invention,

5 is a main view of a state in which refrigerant gas is sucked into the first compression chamber and refrigerant gas is compressed in the second compression chamber.

6 is a main view of a state in which refrigerant gas is compressed in a first compression chamber and refrigerant gas is sucked in a second compression chamber.

7 is a perspective view schematically illustrating main parts of another embodiment of the present invention.

8 is a schematic cross-sectional view of the main part according to FIG. 7;

9 is a main view showing the flow of the refrigerant gas in the suction chamber and the discharge chamber formed in the cylinder block according to FIG.

10 is a sectional view schematically illustrating main parts of a general hermetic reciprocating compressor.

Figure 11 is a main part showing another embodiment of a conventional hermetic reciprocating compressor.

12 is a main view showing still another embodiment of the conventional hermetic reciprocating compressor.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail with reference to the same technical configuration described above.

1 is a cross-sectional view of a main part schematically showing a hermetic reciprocating compressor to which the present invention is applied, FIG. 2 is a schematic exploded perspective view of a main part according to FIG. 1, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in the coupled state according to FIG. 2.

In the hermetic reciprocating compressor which sucks the refrigerant gas and compresses and discharges the refrigerant gas as shown in the drawing,

The present invention, in order to maximize the compression efficiency as well as to minimize the pulsation phenomenon occurs during compression,

First and

second compression chambers

12 and 14 are formed so that suction and compression may be alternately performed, and the compression is performed by mounting grooves 22 formed in the cylinder block 20 mounted on the upper part of the main body frame 140. Seal member 10;

Respective pistons

30 and 30a inserted into the first and

second compression chambers

12 and 14 to suck and compress the refrigerant;

By raising and lowering the

pistons

30 and 30a by converting the rotary motion into a linear motion on the upper part of the rotating shaft rotated by the drive unit 120 having the rotational force by the electrical interaction of the known stator and the rotor. Ascending and descending means 40 to be made alternately; It is shown to include.

In the above, the compression chamber is formed of first and

second compression chambers

12 and 14 instead of one as in the prior art, so that compression can be continuously performed by alternating compression by each of the

pistons

30 and 30a. Compression cycle is also made continuously, thereby increasing the compression efficiency and minimizing the pulsation phenomenon.

In other words, as in the conventional compression process, as the suction and the compression are performed separately, a large pulsation phenomenon occurs due to the large compression cycle, but the suction and the compression are alternately performed in the first and second compression chambers. By doing so, the pulsation can be minimized as the compression cycle is performed continuously.

That is, when the refrigerant is sucked in the first compression chamber 12, the compression process is performed in the second compression chamber 14, and conversely, when the refrigerant is sucked in the first compression chamber 12, the second gas is compressed. By compressing the refrigerant gas in the compression chamber 14, the first compression chamber 12 and the second compression chamber 14 are alternately compressed and suctioned to maximize the compression efficiency as a continuous compression process is made. Will be.

In addition, the upper and upper portions of the first and

second compression chambers

12 and 14 are connected in communication with a suction and valve body 170 in which a normal suction lead valve and a discharge valve for suction and compression of refrigerant gas are formed. At this time, the suction and the valve body 170 has a known configuration, and as the compression chamber is formed of the first and

second compression chambers

12 and 14, a flapper or a reed having normal elasticity is provided. In the thin plate structure, the suction lead valve and the discharge valve are composed of a pair corresponding to the first and second compression chambers, and are opened and closed passively by the pressure difference acting on both sides.

In addition, a discharge muffler having an intake chamber and a discharge chamber in communication with the outside are formed on the outer surface of the suction and valve body 170 so that refrigerant gas is sucked and discharged through the suction lead valve and the discharge valve of the suction and discharge valve body ( 160 is mounted.

Meanwhile, ascending and descending means 40 are provided to suck and compress the refrigerant while the

pistons

30 and 30a inserted into the first and

second compression chambers

12 and 14 alternately move up and down. silver,

It is coupled to the upper end of the rotating shaft 130 is rotated by the drive unit 120 is rotated in the lower cylinder plate 24 of the cylinder block 20 and the cylinder chamber 24 is rotatably coupled to the cylinder chamber 24 Both ends are composed of connecting links 35 rotatably coupled to

rods

32 and 32a of each

piston

30 and 30a.

That is, when one piston 30 is pushed upward and raised as the inclination plate 42 rotates, the other piston 30a installed in a direction parallel to the piston 30 pushed upward and connected to the connection link 35 is provided. ) Descends.

The inclined plate 42 is coupled to the upper end of the rotating shaft 130 is rotated in the lower portion of the cylinder chamber, the upper surface of which is inclined inclined surface (42a) is formed, the height of the upper surface at any point during the rotation of the inclined plate 42 It is changed continuously.

In other words, the inclined surface 42a is formed so that its height gradually increases when the inclined plate 40 is rotated halfway. When viewed from the top of the inclined plate, the inclined surface 42a continuously increases in height. As it is formed, the lower end of each rod is pushed up to the upper portion of the cylinder chamber by the rotation of the rotary shaft.

The inclined surface 42a is formed to gradually increase in height in the semicircular portion, or as shown, the semicircular portion of the inclined surface 42a gradually rises, and then the other semicircular portion gradually descends, so that the inclined surface can be continuously raised and lowered. So that it is formed.

In addition, the inclined surface 42a of the inclined plate 40 is gradually increased in height when the inclined plate is half rotated, the inclined surface is preferably formed to form a horizontal plane radially from the center of rotation. That is, when viewed radially on the rotation axis 130 of the inclined surface, to form a horizontal line perpendicular to the rotation axis on the radiation, the inclined surface 42a is formed by combining such a horizontal line continuously different height.

Accordingly, the local inclined surface, which is in contact with the lower end of each rod, is horizontal in the radiation direction and inclined only in the circumferential direction, thereby eliminating the generation of a force to move each rod in the radiation direction, that is, in the direction of the center of rotation of the inclined surface. It becomes possible. This allows each rod to function properly without bending in the direction of radiation over a long period of use.

The link link 35 is coupled to the center of the cylinder chamber 24 by a fixing pin 35a to enable the seesaw movement, and both ends of the link link 35 are connected to the

rods

32 and 32a of each piston. As it is configured to be mounted in the insertion groove (32 ') (32a') for receiving the end of the one piston connected to one end of the connection link is raised, the other piston is lowered about the fixing pin.

In addition, it is preferable that rolling means 45 is further provided at the bottom of each of the

rods

32 and 32a in contact with the inclined surface 42a of the inclined plate 42 to reduce friction.

The rolling means 45 is embedded to protrude from the bottom of each

rod

32, 32a, it may be made of a ball 45a capable of free rotation. Rolling means is to reduce the wear of the bottom of the rod by the contact with the inclined plate, as well as to minimize the friction load to enable a more smooth operation.

Referring to the accompanying drawings, the operational relationship of the present invention configured as described above with reference to Figures 5 to 6 as follows.

First, as shown in FIG. 5, when the lower end of the rod 32 of one piston 30 is located at the lowest point of the inclined surface 42a of the inclined plate 42, the piston 30 is located at the bottom dead center, and the other piston 30a is The lower end of the rod 32a is in contact with the uppermost point of the inclined surface 42a of the inclined plate 42, and is positioned in the maximum raised state.

That is, when one piston 30 is located at the bottom dead center, the refrigerant gas flows into the suction chamber of the discharge muffler 160 and the first compression chamber 12 through the suction lead valve of the suction and discharge valve bodies 170. Flows into. At this time, since the second compression chamber 14 is subjected to the compression process, the suction lead valves of the suction and discharge valve bodies are closed to prevent the refrigerant from being sucked into the second compression chamber.

Then, the piston 30 located at the bottom dead center as shown in FIG. 6 by the rotation of the inclined plate 42 gradually rises on the inclined surface 42a, compresses the refrigerant gas that has been sucked in, and simultaneously sucks and discharges the valve body ( It is discharged to the outside through the discharge chamber of the discharge muffler 160 by the discharge valve of 170. At this time, the piston (30a) located at the highest point connected to the connecting link 35 is lowered in the compressed state, while the refrigerant gas is returned to the second compression chamber 14 by the suction lead valve of the suction and discharge valve body. To be inhaled.

Thus, as the inclined plate 42 is continuously rotated in one direction by the rotating shaft 130, the above-described action is repeatedly performed, and as the rotary motion converts each of the

pistons

30 and 30a into linear motion, the inclined plate In the high speed operation of (42), the direction of the piston is also smoothly changed while minimizing friction with the piston, thereby reducing the energy loss due to the change of the direction of movement of the rotating shaft as well as the noise.

In addition, as each

piston

30, 30a is repeated so that the compression action is alternately continued in the first compression chamber 12 and the second compression chamber 14, the compression cycle is continued to minimize the pulsation phenomenon and pulsation phenomenon In addition to having a condition to reduce the noise caused by the noise, the compression efficiency can be maximized. When the refrigerant gas is sucked and discharged during the compression process, the refrigerant gas is sucked and discharged through the suction chamber and the discharge chamber of a long distance. It also has a condition that can minimize the generated vibration noise.

The cylinder block 20 has a suction chamber 50 and a discharge chamber 50a through which a refrigerant gas is sucked and discharged through a long distance to the first and

second compression chambers

12 and 14 as shown in FIGS. 7 to 9. Is formed integrally, not only can the refrigerant gas be stably sucked and discharged, but also the vibration noise generated during the suction and discharge process can be offset and minimized in the suction chamber and the discharge chamber having a long distance. will be.

The suction chamber 50 is formed in the lower outer surface of the cylinder block 20, the inlet hole 52 through which the refrigerant gas is introduced, and the inlet space 53 through which the refrigerant gas is circulated and connected with the inlet hole; , Through the inlet space so as to be composed of a suction hole 54 connected to the first and

second compression chambers

12 and 14 on the upper surface of the cylinder block 20, that is, in the inflow space again after the inflow from the bottom As long as it is circulated and sucked upwards.

At this time, the refrigerant gas sucked into the suction hole is introduced into the suction chamber of the discharge muffler and then sucked into the first and second compression chambers through respective suction lead valves formed in the suction and discharge valve bodies.

The discharge chamber 50a includes discharge holes 56 connected to the first and second compression chambers on the upper surface of the cylinder block 20, that is, refrigerant gas compressed in the first and

second compression chambers

12 and 14. Discharge through the discharge valve of the suction and discharge valve body through the discharge chamber of the discharge muffler and is discharged, the discharge space 57 is connected to the discharge hole and the compressed refrigerant gas is circulated and discharged, and the cylinder through the discharge space By having a discharge hole 58 formed in the lower side of the outer surface of the block 20, the refrigerant gas, such as the suction chamber is also passed through the discharge space through the upper discharge hole again and discharged to the discharge hole of the lower To have the longest distance possible.

Accordingly, the vibration noise generated when the compressed refrigerant gas is compressed in the discharge chamber having the maximum distance even when discharged can be canceled and minimized.

As a result, when the refrigerant gas is introduced into the first and second compression chambers and discharged after compression, vibration noise generated when the refrigerant gas is introduced and discharged through the maximum length path of the suction chamber and the discharge chamber is achieved. It will also have conditions that can be minimized.

In addition, since the suction chamber and the discharge chamber are integrally formed inside the cylinder block, the volume is also minimized, and thus, the overall volume of the hermetic reciprocating compressor can be reduced and miniaturized.

According to the present invention, the compression efficiency is maximized as the compression is performed by the first and second compression chambers instead of one compression chamber, and the compression is also alternately performed in the first and second compression chambers. It has the effect of minimizing the noise caused by the pulsation phenomenon.

In addition, by forming the length of the refrigerant gas is sucked and discharged as long as possible, it also has the effect of minimizing the vibration noise generated in the process of the refrigerant gas is sucked and discharged.

In addition, as the structure for converting the rotational motion into a reciprocating motion even at high speed by the lifting and lowering means is simply implemented, the assembly is excellent and the compression efficiency is maximized by minimizing the frictional load.

In addition, by the rolling means provided in the contact portion of the rod and the inclined surface of the inclined plate as the lifting and lowering means to minimize the frictional load and to reduce the wear of the rod due to the contact can ensure a smoother operation and longer service life It also has an effect.

In addition, the structure of raising and lowering is simple, and it is excellent in assembling property and productivity, and also has high economic efficiency.

In addition, since the suction chamber and the discharge chamber are integrally formed in the cylinder block, the total volume of the compressor can be reduced by minimizing the volume, thereby reducing the volume of the high-output compressor, thereby reducing the volume of the refrigerant and through the long path. The suction and discharge of the compressed gas is made also has the effect of minimizing the vibration noise due to the suction and discharge.

Claims

In a hermetic reciprocating compressor,

A compression chamber member having first and second compression chambers formed therein so as to alternately perform suction and compression, and mounted as mounting grooves formed in the cylinder block;

Respective pistons inserted into the first and second compression chambers to suck and compress the refrigerant;

Lifting and lowering means for converting the rotary motion to a linear motion on the top of the rotating shaft rotated by the drive unit to make the rise and fall of each piston alternately; Hermetic reciprocating compressor comprising a.
The method of claim 1,

The raising and lowering means is composed of an inclined plate which is coupled to the rotating shaft and rotated in the lower portion of the cylinder chamber of the cylinder block, and a coupling link rotatably coupled to the cylinder chamber and both ends rotatably coupled to the rod of each piston. Sealed reciprocating compressor characterized in that.
The method of claim 2,

The connecting link has a center coupled to the cylinder chamber with a fixed pin, and both ends of the connecting link is configured to be mounted in an insertion groove for receiving the end of the connecting link to the rod of each piston.
The method of claim 2,

The inclined surface of the inclined plate is formed to form a horizontal plane radially from the rotation center, characterized in that the sealed reciprocating compressor.
The method of claim 4, wherein

Hermetically sealed reciprocating compressor, characterized in that the rolling means for reducing the friction is further provided at the bottom of each rod in contact with the inclined surface of the inclined plate.
The method according to any one of claims 1 to 5,

The cylinder block, hermetic reciprocating compressor, characterized in that the suction chamber and the discharge chamber in which the refrigerant gas is sucked and discharged into the first and second compression chambers are integrally formed.
The method of claim 6,

The suction chamber includes an inlet hole formed in the lower outer surface of the cylinder block, an inlet space connected to the inlet hole to circulate the refrigerant gas, and connected to the first and second compression chambers on the upper surface of the cylinder block through the inlet space. Sealed reciprocating compressor, characterized in that consisting of suction holes.
The method of claim 6,

The discharge chamber includes a discharge hole connected to the first and second compression chambers on an upper surface of the cylinder block, a discharge space circulated through the discharged refrigerant gas connected to the discharge hole, and a lower portion of the outer surface of the cylinder block through the discharge space. Sealed reciprocating compressor, characterized in that consisting of discharge holes formed in.