KR100972174B1 - Sealing type recipricating compressor - Google Patents

Abstract

PURPOSE: A sealed reciprocating compressor is provided to maximize compression efficiency by proceeding compression with a first compression room and a second compression room. CONSTITUTION: A sealed reciprocating compressor comprises a driving unit which makes a rotary shaft rotate and a compression unit which compresses refrigerant gas in a compression room formed in a cylinder block(115) by converting the rotational motion of the rotary shaft to the linear motion. The compression room comprises a first compression room(40) and a second compression room(40a). The refrigerant gas is compressed with pistons(30,30a) in the first compression room and the second compression rooms. The first compression room and the second compression rooms are formed since a compression member(45) is inserted into a mounting recess(42) formed on the cylinder block.

Description

Sealing type reciprocating compressor {sealing type recipricating 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, the hermetic reciprocating compressor 100 is a device for sucking and compressing a refrigerant into a sealed space and then discharging the refrigerant, as shown in FIG. 6, as a compression unit 110 for compressing the refrigerant and a driving unit 120 for driving the refrigerant. It is composed.

The compression unit 110 is provided in the sealed container 112 forming a closed space, the cylinder block 115 is formed and mounted to the compression chamber 115a on the upper portion of the main body frame 114, and compression A piston 116 is provided to reciprocate the inside of the chamber 115a, and a discharge muffler 117 having a suction chamber and a discharge chamber communicating with the outside is coupled to one side of the cylinder block 115, and the compression chamber and the suction chamber are combined. And a suction and discharge valve body 118 between the discharge chamber so that the refrigerant gas of low temperature and low pressure is discharged and the refrigerant gas of high temperature and high pressure is discharged.

The suction and discharge valve body 118 has a flapper or reed type thin plate structure having a general elasticity, and the flapper or lead type suction and discharge valve body 118 acts on both sides. It is opened and closed passively by the pressure difference.

The driving unit 120 includes a stator 122 that forms a magnetic field, a rotor 124 that rotates in electrical interaction with the stator 122, and a rotor part 124 that is press-fitted to a hollow part of the rotor 124. The rotating shaft 125 is rotated together, and the connecting rod 126 for converting the rotational movement into the linear movement is connected to the rotating shaft 125 to drive the piston 116, and friction between the upper portion of the rotating shaft and the body frame Bearing 128 is installed to reduce.

In the closed reciprocating compressor 100 configured as described above, the refrigerant gas having a low temperature and low pressure during the backward movement of the piston 116 is sucked and discharged from an external evaporator (not shown) through a suction pipe and a suction muffler in the sealed container 112. The suction lead valve of the valve body 118 flows into the suction chamber of the discharge muffler 117 and then into the compression chamber 115a. During the forward movement of the piston 116, the high temperature and high pressure refrigerant gas discharged from the compressor is From the discharge valve of the suction and discharge valve body 118, the discharge chamber and the discharge muffler 117 are discharged to an external condenser (not shown) through a discharge tube fixedly sealed to the sealed container.

However, in the conventional hermetic reciprocating compressor as described above, not only the start-up noise at the time of converting the rotary motion into linear reciprocating motion is generated in the process of reciprocating the piston through the connecting rod at the rotational axis during the initial operation, There was also a problem that the vibration noise caused by the pulsation phenomenon caused by the suction and compression periodically performed in the compression chamber is also severely generated. That is, since a cycle in which one piston sucks and compresses ten times in one compression chamber when the suction and compression of ten times is made is large, a pulsation phenomenon occurs and a vibration noise is increased.

In addition, not only shortens the life due to friction between the contact portion between the rotating shaft and the connecting rod and the compression chamber of the piston and the cylinder block, but also causes the rotational motion to be converted into a linear reciprocating motion, that is, a large impact noise due to the change of direction. This has been brought about.

Meanwhile, in order to minimize vibration noise caused by the pulsation phenomenon occurring during the suction and compression performed periodically, as shown in FIG. 7, the refrigerant gas is provided on the upper surfaces of both main body frames 114 of the cylinder block 115. In order to reduce vibration noise by being connected to the suction and discharge parts, a method of forming the respective resonance chambers 130 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 length of the pipe is also lengthened, the compression efficiency is considerably lowered, as well as the volume of the body frame is significantly larger as the resonance chamber is formed.

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. .

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

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 provide excellent assembly properties by a simple structure.

The present invention for solving the technical problem as described above, the hermetic reciprocating compressor comprising a drive unit for rotating the rotary shaft and a compression unit for compressing the refrigerant gas in the compression chamber formed in the cylinder block by converting the rotational movement of the rotary shaft to linear movement In the compression chamber, the first and second compression chambers are formed by the first and second compression chambers in which the refrigerant gas is compressed by each piston of the rising and lowering alternately by the raising and lowering means, the first and second compression chambers are formed in the cylinder block Characterized in that the compression member is formed in which the first and second compression chambers are inserted into the mounting groove.

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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.

The raising and lowering means is configured to be coupled to the rotating shaft is rotated in the cylinder chamber lower portion of the cylinder block, and the coupling link is rotatably coupled to the cylinder chamber and both ends rotatably coupled to the rod of each piston It is done.

The connecting link has a center coupled to the cylinder chamber by a fixing pin, and both ends of the connecting link are configured to be mounted to an insertion groove accommodating an end of the connecting link to a 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.

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, since the suction chamber and the discharge chamber are integrally formed in the cylinder block, the overall volume of the compressor can be reduced by minimizing the volume, thereby reducing the volume of the high-power compressor and miniaturizing the volume of the compressor.

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

1 is a cross-sectional view of main parts of the present invention provided in a hermetic compressor.
2 is an exploded perspective view showing main parts of the present invention.
3A is a cross-sectional view taken along line AA in FIG. 2;
3B is a cross-sectional view taken along line BB in the coupled state according to FIG. 2;
Figure 4 is a main part showing the flow of the refrigerant gas passing through the resonance space formed in the cylinder block of the present invention.
5a and 5b schematically show the operating state of the present invention,
5A is a main view of a state in which refrigerant gas is sucked in a first compression chamber and refrigerant gas is compressed in a second compression chamber.
5B 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.
6 is a sectional view schematically showing a main part of a general hermetic reciprocating compressor.
Figure 7 is a main part showing another embodiment of a 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 main parts of a state in which the present invention is provided in a hermetic compressor, FIG. 2 is an exploded perspective view of main parts of the present invention, FIG. 3A is a cross-sectional view taken along line AA of FIG. 2, and FIG. 2 is a cross-sectional view taken along the line BB of the coupled state.

As shown in the drawing, the drive unit 120 rotates the rotating shaft 125 together with the rotor rotating in electrical interaction with the stator and the cylinder block 115 by converting the rotational movement of the rotating shaft into a linear movement. In the hermetic reciprocating compressor (1) consisting of a compression unit (110) for compressing refrigerant gas in a compression chamber formed at

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

The compression chamber,

The first and second compression chambers 40 and 40a in which the refrigerant gas is compressed by the pistons 30 and 30a alternately rising and falling by the raising and lowering means 20 are shown. . That is, as the compression is performed alternately by each piston in the first and second compression chambers instead of one compression chamber, the compression is continuously performed, so that the pulsation phenomenon can be minimized. will be.

In other words, in one compression process, the pulsation phenomenon is large due to the large compression cycle due to the suction and the compression separately, but the suction and the compression are alternately performed in the first and second compression chambers. Therefore, the compression cycle is performed continuously to minimize the pulsation phenomenon.

In addition, when the refrigerant is sucked in the first compression chamber, a compression process is performed in the second compression chamber. On the contrary, when the refrigerant gas sucked in the first compression chamber is compressed, the refrigerant gas is sucked in the second compression chamber. Since the first compression chamber 40 and the second compression chamber 40a can be alternately compressed and suctioned, it is possible to maximize the compression efficiency as the compression process is continuously performed.

In addition, the upper and upper portions of the first and second compression chambers 40 and 40a are connected in communication with a suction and valve body 118 in which a normal suction lead valve and a discharge valve are formed to compress refrigerant gas. And the valve body 118 has a known configuration, the flapper to the reed-shaped thin plate having a normal elasticity as the compression chamber is formed of the first and second compression chamber 40 (40a) In the structure, the suction lead valve and the discharge valve are configured in 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 117 is formed on the outer surface of the suction and valve body, respectively, in which a suction chamber and a discharge chamber communicating with the outside are formed so that refrigerant gas is sucked and discharged through the suction lead valve and the discharge valve of the suction and discharge valve body. Is mounted.

The first and second compression chambers 40 and 40a are mounting grooves 42 formed in the cylinder block 115 and the first and second compression chambers 40 into which the respective pistons 30 and 30a are inserted. The compression member 45 in which the 40a is formed is inserted and formed.

In the cylinder block 115, the suction chamber 10a and the discharge chamber 10b through which the refrigerant gas is sucked and discharged through the long distance to the first and second compression chambers 40 and 40a are integrally formed. Not only can the 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.

As the suction chamber 10a and the discharge chamber 10b are shown in FIG. 4,

The suction chamber 10a is formed in the lower outer surface of the cylinder block 115, the inlet hole 12 through which the refrigerant gas is introduced, and the inlet space 12a connected with the inlet hole and the refrigerant gas is circulated and introduced therein. The suction hole 12b is connected to the first and second compression chambers 40 and 40a on the upper surface of the cylinder block 115 via the inflow space. It is to have the maximum distance to be suctioned to the top while circulating.

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 10b includes discharge holes 14 connected to the first and second compression chambers on the upper surface of the cylinder block 115, that is, the refrigerant gas compressed in the first and second compression chambers 40 and 40a. Discharge through the discharge chamber of the discharge muffler through the discharge valve of the suction and discharge valve body, the discharge chamber 14a is connected to the discharge hole and the compressed refrigerant gas is circulated and discharged, and the cylinder through the discharge space By the exhaust hole 14b formed in the lower side of the outer surface of the block 115, the refrigerant gas, which is compressed like the suction chamber, passes through the upper discharge hole and passes through the discharge space again, and then discharges into the lower discharge hole. To have the maximum distance.

Accordingly, the compressed refrigerant gas may be minimized by canceling the vibration noise generated during compression in the discharge chamber having the maximum long distance even during discharge.

The raising and lowering means 20 is coupled to the rotating shaft 125, the inclined plate 22 is rotated in the lower cylinder chamber 115b of the cylinder block 115, and both ends rotatably coupled to the cylinder chamber 115b It consists of a connecting link 35 rotatably coupled to the rods 32, 32a of each of the pistons 30, 30a. That is, one piston 30 is pushed upward as the rotation of the inclined plate 22 is pushed upward, the other piston is installed in a direction parallel to the piston 30 is pushed upward and connected to the connection link 35 ( 30a) is lowered.

The inclined plate 22 is coupled to the upper end of the rotating shaft 125 is rotated in the lower portion of the cylinder chamber, the upper surface is formed with an inclined inclined surface, the height of the upper surface is continuously changed at any point during the rotation of the inclined plate. At this time, the inclined surface of the inclined plate is gradually increased in height during the half rotation of the inclined plate, the inclined surface is preferably formed to form a horizontal plane radially from the center of rotation.

The connecting link 35 is coupled to the center of the cylinder chamber 115b by a fixing pin 35a to enable the seesaw movement, and both ends of the connecting 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 'and 32a' accommodating the end of the link, when one piston connected to one end of the link is raised, the other piston is lowered about the fixing pin.

In addition, it is preferable to further include a ball at the bottom of the rod of each piston so that the cloud can be made more smoothly.

The operational relationship of the present invention configured as described above will be described with reference to FIGS. 4 and 5A and 5B.

First, as shown in FIG. 5A, when the lower end of the rod 32 of one piston 30 is positioned at the bottom of the inclined plane of the inclined plate 22, the piston 30 is located at the bottom dead center, and the other piston 30a is the rod 32a. ) Is positioned in the state of being raised to the maximum in contact with the top of the inclined surface of the inclined plate (22).

That is, when one piston 30 is located at the bottom dead center, the refrigerant gas passes through the inlet 12, the inlet 12a and the inlet 12b of the suction chamber 10a. As it is introduced into the suction chamber, it is introduced into the first compression chamber 40 through the suction lead valve of the suction and discharge valve bodies. At this time, since the second compression chamber 40a is subjected to a compression process, the suction lead valves of the suction and discharge valve bodies are closed so that the refrigerant is not sucked into the second compression chamber.

Then, the piston 30 located at the bottom dead center as shown in FIG. 5B by the rotation of the inclined plate 22 gradually rises on the inclined surface, compresses the refrigerant gas that has been sucked, and simultaneously After discharged to the discharge chamber of the discharge muffler 117 by the discharge valve is discharged to the outside through the discharge hole 14, the discharge space 14a and the discharge hole (14b) of the discharge chamber (10b). At this time, the piston 30a located at the uppermost point connected to the connecting link 35 is lowered after the compression is finished, and the refrigerant gas is returned to the second compression chamber 40a by the suction lead valve of the suction and discharge valve bodies. To be inhaled.

Thus, as the inclined plate 22 is continuously rotated in one direction by the rotating shaft 125, the above-described action is repeatedly performed as the inclined plate converts each piston 30, 30a into a linear motion. In the high speed operation of (22), the direction of the piston is also smoothly changed while minimizing friction with the piston, so that the energy loss due to the change of the rotational direction of the rotary shaft can be reduced 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 40 and the second compression chamber 40a, the compression cycle is continued to minimize the pulsation phenomenon to minimize the 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.

10a: suction chamber 10b: discharge chamber
12: inlet hole 12a: inlet space
12b: suction hole 14: discharge hole
14a: discharge space 14b: discharge hole
20: raising and lowering means 22: inclined plate
30,30a, 116: Piston 32,32a: Rod
32 ', 32a': Insertion groove 35: Link
35a: fixed pin 40: first compression chamber
40a: second compression chamber 42: mounting groove
45: compression member
100: hermetic reciprocating compressor
110: compression unit 114: body frame
115: cylinder block 115a: compression chamber
115b: cylinder chamber 117: discharge muffler
118: suction and discharge valve body 120: drive unit

Claims (8)

delete In the hermetic reciprocating compressor comprising a drive unit for rotating the rotary shaft and a compression unit for converting the rotary motion of the rotary shaft into a linear motion to compress the refrigerant gas in the compression chamber formed in the cylinder block,
The compression chamber,
It is formed by the first and second compression chambers 40 and 40a in which the refrigerant gas is compressed by the pistons 30 and 30a alternately rising and falling by the lifting and lowering means 20,
The first and second compression chambers 40 and 40a are formed by inserting a compression member 45 into which the first and second compression chambers are formed into the mounting groove 42 formed in the cylinder block 115. Hermetic reciprocating compressors. The hermetic reciprocating compressor according to claim 2, wherein the cylinder block (115) is integrally formed with a suction chamber (10a) and a discharge chamber (10b) in which refrigerant gas is sucked into and discharged into the first and second compression chambers. According to claim 3, The suction chamber (10a), the inlet hole 12 formed in the lower outer surface of the cylinder block, the inlet space (12a) is connected to the inlet hole and the refrigerant gas is circulated inflow, A hermetic reciprocating compressor comprising a suction hole (12b) connected to the first and second compression chambers on the upper surface of the cylinder block via an inflow space. The discharge chamber (10b) according to claim 3, wherein the discharge chamber (10b) has a discharge hole (14) connected to the first and second compression chambers on the upper surface of the cylinder block, and a discharge space in which the refrigerant gas compressed by the discharge hole is circulated and discharged. And a discharge hole (14b) formed in the lower portion of the outer surface of the cylinder block through the discharge space. According to any one of claims 2 to 5, The raising and lowering means 20 is coupled to the rotating shaft 125 and the inclined plate 22 which is rotated in the lower cylinder chamber 115b of the cylinder block 115 and And a connecting link (35) rotatably coupled to the cylinder chamber and both ends rotatably coupled to rods (32) (32a) of each piston (30) (30a). The connection link 35 has a center thereof coupled to a cylinder chamber 115b by a fixing pin 35a, and both ends of the connection link 35 are connected to rods 32 and 32a of each piston. Sealed reciprocating compressor, characterized in that it is configured to be mounted to the insertion groove (32 ') (32a') for receiving the end of the link. 7. The hermetic reciprocating compressor as claimed in claim 6, wherein the inclined surface of the inclined plate is formed so as to form a horizontal plane radially from the center of rotation.

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