KR100436271B1 - Rotary compprersor - Google Patents

Abstract

The present invention relates to a rotary compressor, and to provide a structure for discharging the high-pressure refrigerant compressed in the compression chamber of the cylinder through the inside of the rotary shaft.

According to the present invention, there is provided a rotary compressor including a cylinder, a rotating shaft having an eccentric portion for uniaxially rotating a roller piston provided in the cylinder, and an upper flange supporting the rotating shaft and being in close contact with an upper surface of the cylinder. In the lower portion of the upper flange in close contact, a discharge groove is formed to form a flow path extending from the compression chamber of the cylinder to the rotary shaft, is formed in the inner core of the rotary shaft and the inlet is the discharge groove in a period of 360 degrees of rotation of the rotary shaft The outlet A is formed in the discharge passage is formed on the upper side of the rotating shaft.

The rotary compressor according to the above configuration does not require a discharge valve base plate and a discharge valve mounting plate because it does not require a discharge valve, and furthermore, the discharge valve base plate due to vibration of the discharge valve and Since no noise is generated between the two, there is no need for a separate muffler for noise reduction, thereby reducing the production cost and reducing noise.

Description

Rotary compressors {ROTARY COMPPRERSOR}

The present invention relates to a rotary compressor, and more particularly, to improve the discharge structure of the compressed refrigerant of the rotary compressor to discharge the compressed refrigerant through the rotary shaft.

Generally, the compressor compresses a low pressure refrigerant gas introduced from the evaporator between the evaporator and the condenser at a high temperature and high pressure and sends it to the condenser. Referring to FIGS. 1 and 2, a schematic configuration and operation of the rotary compressor will be described. The rotary compressor has a configuration in which the driving unit 10 and the compression unit 11 are largely included in the cylindrical casing 100 and the casing 100. At the center of the drive unit 10 is a rotating shaft 101 having an eccentric portion 101a and a rotor 102 fixedly coupled to the rotating shaft 101 to generate rotational power by a magnetic field and to transmit the rotating shaft 101 to the rotating shaft 101. It is provided and is spaced apart from the rotor 102 by a predetermined interval is composed of a stator 103 is fixed to the casing 100 surrounding the outer periphery of the rotor (102). In addition, the compression unit 11 is formed with a cylinder 106 in which the eccentric portion 101a extending eccentrically from the rotation shaft 101 and the roller piston 110 are integrally formed, and the upper and lower surfaces of the cylinder 106 Is tightly sealed by the upper flange 107 and the lower flange 108 supporting the rotating shaft 101. The upper flange 107 has discharge holes 107a through which high-pressure refrigerant compressed in a compression chamber is discharged. And a discharge valve 112 for opening and closing the discharge hole 107a and a valve stop plate 112a for preventing elastic deformation due to excessive opening of the discharge valve 112. In addition, the upper flange is provided with a muffler 111 to reduce the noise when the compressed refrigerant is discharged, the muffler 111 is formed with a discharge hole (111a) for discharging the compressed refrigerant.

2 is a top view of the compression unit, with reference to the compression operation of the rotary compressor.

When the rotating shaft 101 rotates in the direction of the solid arrow shown in FIG. As the volume of 204 increases, low-pressure refrigerant is sucked into the suction chamber 204 of the cylinder 106 through the suction port 105. Correspondingly, however, the volume of the compression chamber 205 is reduced so that the air in the compression chamber 205 is compressed to high pressure. At this time, the suction chamber 204 and the compression chamber 205 are partitioned by a vane 201 capable of forward and backward movement by the spring 201a, so that the compression chamber 205 and the suction chamber 204 are separated. Shut off the gas exchange. The discharge valve 112 of FIG. 1 is opened to the valve blocking plate 112a by the pressure of the compressed high-pressure gas by the operation as described above. Then, the compressed air opens the discharge hole 111a and the discharge port 109. It will be discharged through.

However, the rotary compressor as described above must provide a separate part as the inevitable configuration of the discharge valve 112 and the valve stop plate (112a), and also the discharge valve 112 and the valve stop plate (112a) during the discharge stroke It is common to configure the muffler 111 in order to reduce the noise generated between the, and the miscellaneous configuration is added in the manufacture of the compressor, there is a problem that the cost of the compressor and the loss of the efficiency of the compressor by the discharge valve .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a discharge structure for discharging a refrigerant through a rotating shaft, thereby excluding the configuration of the discharge valve and the valve base plate and the configuration of the muffler from the compressor, thereby eliminating the valve. It is to provide a rotary compressor that can eliminate the loss of efficiency and noise between the discharge valve and the valve bottom plate, and reduce the production cost of the compressor.

1 is a side cross-sectional view showing a conventional rotary compressor.

2 is a cross-sectional view of a cylinder for expressing a compressor operation of a rotary compressor.

Figures 3a, 3b, 3c is an exploded perspective view and a side cross-sectional view of the upper and lower bearings and the roller piston according to an embodiment of the present invention and the corresponding rotation axis.

4A, 4B, and 4C are exploded perspective views and side cross-sectional views of upper and lower bearings and roller pistons and corresponding rotating shafts according to still another embodiment of the present invention.

Figure 5 is a side cross-sectional view showing another embodiment according to the present invention.

Fig. 6 is a side sectional view showing the same invention in which the above embodiment according to the present invention is modified.

Figure 7 is a side cross-sectional view showing another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

301: rotating shaft 301a: eccentric portion

302: upper flange 302a, 302b, 302c, 302d: discharge groove

303: lower flange 304: discharge flow path

304a: inlet 304b: outlet A

304c: outlet B 305: roller piston

306: rotating shaft insertion hole 307: compression chamber

The present invention for achieving the above object, in the rotary compressor including a rotating shaft having an eccentric portion for uniaxially rotating the roller piston provided in the cylinder and the upper flange supporting the rotating shaft and in close contact with the upper surface of the cylinder And a discharge groove forming a flow path from the compression chamber of the cylinder to the rotary shaft at a lower portion of the upper flange in close contact with the cylinder, and is formed at an inner core of the rotary shaft and the inlet is rotated 360 degrees of the rotary shaft. The discharge passage is formed in accordance with the discharge groove and the outlet A is formed on the upper side of the rotating shaft.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the drawings. Hereinafter, components having the same functions and effects will be denoted by the same reference numerals, and redundant descriptions will be omitted.

3A, 3B, and 3C illustrate a discharge structure of a rotary compressor according to an embodiment of the present invention.

FIG. 3A shows only the upper flange 302 and the lower flange 303 and the roller piston 305. The space inside the cylinder having the compression chamber and the suction chamber has a configuration as described in the related art for convenience. Abbreviated. That is, an inner space of the cylinder exists outside the roller piston 305 and the compression chamber and the suction chamber form a variable space according to the rotation of the roller piston 305. As shown in FIG. 3A, a discharge groove 302a is formed at a lower depth from a compression chamber of a cylinder to a rotation shaft insertion hole 306 into which a rotation shaft is inserted at a lower end of the upper flange 302. A flow path extending from the compression chamber of the cylinder to the rotation shaft insertion hole 306 is formed. This upper flange is then shown in Figure 3b is inserted into the rotating shaft insertion hole 306 and corresponds to the rotating shaft 301 to be supported by the upper flange 302. That is, the discharge passage 304 having an inlet port 304a at the inner core of the rotary shaft 301 and a outlet A 304b at the upper surface of the rotary shaft 301 at a portion contacting the eccentric portion 301a of the rotary shaft 301. Is formed. The inlet 304a is preferably formed to be in communication with the discharge groove 302a when the internal volume of the cylinder compression chamber is minimized according to the rotation of the rotary shaft 301 and the refrigerant has the highest pressure. .

The operation of the present invention according to the above embodiment will be described with reference to FIG. 3C showing the coupling between the upper flange 302 of FIG. 3A and the rotating shaft 301 shown in FIG. 3B.

As described in the description of the related art with reference to FIG. 2, when the rotating shaft 301 rotates, the roller piston 305 is in contact with the inner circumferential surface of the cylinder by the eccentric portion 301a of the rotating shaft 301 and rotates uniaxially. As a result, the volume of the compression chamber 307 becomes smaller in the space inside the cylinder divided into the compression chamber 307 and the suction chamber by vanes, so that the refrigerant in the compression chamber 307 becomes increasingly high pressure. Of course, the refrigerant in the discharge groove 302a forming the same sealed space as the compression chamber 307 also exists as a refrigerant having the same pressure as the compression chamber. However, even when the high pressure is increased so that a strong fluid pressure is generated, there is no portion where the refrigerant which is gradually compressed at high pressure is discharged unless one side of the inlet 304a and the discharge groove 302a is matched. The high pressure refrigerant in the seal cannot be discharged. However, most preferably, the inlet port 304a of the discharge passage 304 formed in the rotary shaft 301 is rotated when the refrigerant in the compression chamber 307 is at the highest pressure. When the compression chamber 307 coincides with one side of the discharge groove 302a forming a space, the compression chamber 307 communicates with the discharge passage 304 through the discharge groove 302a. The discharge chamber 302a and the discharge passage 304 are sequentially passed through the outlet A 304b of the discharge passage 304 to exit the compression chamber.

4A, 4B, and 4C are basically the same as those of the embodiments described with reference to FIGS. 3A, 3B, and 3C, but the technical concept is the same. As described with reference to Figs. 3A, 3B and 3C. Therefore, it demonstrates centering on the structure which shows a predetermined difference.

As shown in FIG. 4A, the upper flange 302 is formed with a discharge groove 302b extending to the rotation shaft insertion hole 306 but not reaching a point thereof. The axis of rotation corresponding to this upper flange 302 is shown in Figure 4b. A discharge passage 304 having an inlet port 304a on an upper surface of the eccentric portion 301a of the rotary shaft 301 and an outlet A 301b on an upper surface of the rotary shaft 301 is the rotary shaft 301. It is formed in the inner heart. The coupling relationship between the upper flange 302 shown in FIG. 4A and the rotating shaft 301 shown in FIG. 4B is as shown in FIG. 4C. That is, the high pressure refrigerant compressed in the cylinder according to the constant operation of the compressor is the moment when the inlet port (304a) formed on the upper surface of the eccentric portion (301a) coincides with the discharge groove (302b) in accordance with the rotation of the rotary shaft (301) The discharge chamber 302b and the discharge passage 304 exit the compression chamber of the cylinder.

FIG. 5 is another embodiment having the same technical concept as the above two embodiments and showing a predetermined difference in configuration. As shown in FIG. 5, an inlet of the discharge flow path formed at the inner core of the rotating shaft 301 is the rotating shaft 301. The discharge groove 302c formed in the upper flange 302 also extends to the inner circumferential surface of the upper flange 302 in response thereto. Since the configuration is basically the same as the above embodiment and the configuration is also obvious from the above embodiment, detailed description thereof will be omitted.

6 is an embodiment having a configuration slightly different from the above three embodiments, but the technical concept is the same as the above three embodiments, and its configuration is also extremely obvious to those skilled in the art. I will compress this explanation. That is, as shown in FIG. 6, unlike the three embodiments, the inlet 304a of the discharge passage 304 formed in the lower flange 303 and formed in the inner center of the rotary shaft 301 is the rotary shaft ( 301 is formed on the lower surface of the eccentric portion 301a. The operation and operation of the compressor according to this are the same and very similar to the above three embodiments and will be omitted since it is obvious to those skilled in the art.

Figure 7 is another embodiment according to the present invention, which shows a considerable difference in configuration from the above embodiment.

In Fig. 7, the discharge passage 304 formed at the inner core of the rotary shaft 301 forms an outlet A 304b on the upper surface of the rotary shaft 301 and an outlet B 304c on the lower surface of the rotary shaft 301. . In this configuration, the operation of the compressor is the same as described above, but as the outlet B 304c is separately configured, the operation of the compressor is different from the embodiment described with reference to FIGS. That is, when one side of the inlet 304a and the discharge groove 302e of the discharge passage 304 coincide, the high pressure refrigerant compressed in the compression chamber of the cylinder sequentially moves the discharge groove 302e and the inlet 304a. It is discharged to the outlet A 304b and the outlet B 304c. In this case, the discharged refrigerant contains oil supplied in the form of fine powder for smooth operation of the compressor. In this case, the oil contained in the refrigerant discharged to the outlet A 304b is directed toward the outlet B 304c by gravity. It is possible to reduce the oil content of the refrigerant gas discharged to fall, and also in the embodiment with reference to Figures 3, 4, 5 and 6, the discharge flow is clogged by the oil due to the continued operation of the compressor may occur However, according to the present embodiment, since the oil exits through the outlet B 304c under the influence of gravity, there is no fear that the discharge passage 304 is blocked by the oil.

In addition to the above description, a person having ordinary knowledge in the technical field to which the present invention pertains may form a discharge tube in place of the discharge groove in the upper or lower flange, but only another description within the same category as described above. It will be possible to practice the present invention.

The rotary compressor according to the above configuration does not require a discharge valve base plate and a discharge valve mounting plate because it does not require a discharge valve, and furthermore, the discharge valve base plate due to vibration of the discharge valve and Since no noise is generated between the two, there is no need for a separate muffler for noise reduction, thereby reducing the production cost and reducing noise.

Claims (3)

In a rotary compressor comprising a cylinder, a rotating shaft having an eccentric portion for uniaxially rotating the roller piston provided in the cylinder, and an upper flange supporting the rotating shaft and in close contact with an upper surface of the cylinder, In the lower portion of the upper flange in close contact with the cylinder, a discharge groove is formed to form a flow path extending from the compression chamber of the cylinder to a point of the rotating shaft, The inlet is formed on the inner core of the rotary shaft, the inlet is provided to match the discharge groove in a cycle of 360 degrees of rotation of the rotary shaft, the outlet A is a rotary compressor, characterized in that the discharge passage is provided on the upper side of the rotary shaft. The method of claim 1, The inlet is formed on the upper surface of the eccentric portion rotary compressor. The method of claim 1, And the discharge passage further forms an outlet port B under the rotary shaft.