KR19980026932U - Reciprocating compressor - Google Patents

Abstract

The present invention relates to a reciprocating compressor, the reciprocating compressor according to the present invention is a cylinder block (20), which is built in the sealed container 10 and the sealed container 10 is stored in the bottom and the compression chamber therein, In addition, the refrigerant is introduced into the compression chamber 40 by being interposed between the suction muffler 50 and the suction muffler 50 and the compression chamber 40 to shield the noise generated by the refrigerant flowing into the compression chamber from the outside of the sealed container 10. The suction pipe 51 which guides is provided. The suction muffler 50 is divided into an upper shielding chamber 52 communicating with a flow path into which a refrigerant flows, and a lower shielding chamber 53 communicating with a suction pipe 53. The upper shielding chamber 52 and the lower part are provided. The shielding chambers 53 are in communication with each other by a plurality of guide passages for guiding the refrigerant.

The suction muffler having the suction pipe as in the present invention reduces the flow resistance when the refrigerant flows, and thus the refrigerant flows more smoothly, thereby contributing to the efficiency of the refrigeration cycle by increasing the mass of the refrigerant flowing into the cylinder. In addition, the separation of the oil from the refrigerant introduced into the suction muffler is more easily carried out, thereby improving the oil recovery efficiency.

Description

Reciprocating compressor

The present invention relates to a reciprocating compressor, and more particularly to a suction muffler of the reciprocating compressor to shield the noise generated by the suction refrigerant.

In general, the reciprocating compressor serves to compress the refrigerant to a high temperature and high pressure in a refrigeration cycle in which the compression, condensation, expansion, and evaporation processes are continuously performed through the refrigerant to be discharged to the condenser.

The general reciprocating compressor having this function, as shown in Figure 1, the upper vessel 11 and the lower vessel 12 is coupled to transmit power and a drive unit for generating power in the hermetically sealed container 10. It is composed of a compression unit for receiving and compressing the refrigerant, the bottom of which is stored oil for lubricating and cooling each sliding part.

The driving unit includes a stator 13 having a coil wound to generate a magnetic field by applying external current, and a rotor 14 provided inside the stator 13 to rotate under the influence of a magnetic field generated by the stator 13. Then, the rotary shaft 15 is pressed into the rotor 14 and rotates with the rotor 14 is provided, the eccentric shaft 17 is provided eccentrically coupled to the rotary shaft 15 is provided. . In addition, an oil pick-up 18 is installed at the lower end of the eccentric shaft 17 to be inclined and inclined with respect to the eccentric shaft 17 to pump oil accumulated in the bottom of the sealed container 10. On the other hand, the lower portion of the rotor 14 of the outer periphery of the rotary shaft 15 is provided with a support bearing 16 for supporting the rotary drive of the rotary shaft 15.

The compression unit includes a cylinder block 20 including the compression chamber 40 and a piston 19 for linearly reciprocating the inside and the left of the compression chamber 40 of the cylinder block 20. The piston 19 is vertically coupled to the eccentric shaft 17 by the piston rod 39. A cylinder head 21 having a suction chamber 25 and a discharge chamber 26 coupled thereto is coupled to the cylinder block 20, and is interposed between the cylinder head 21 and the cylinder block 20 to intake the valve. The valve plate 22 provided with the 27 and the discharge valve 28 is provided. And the suction muffler 32 for removing the noise of the refrigerant flowing into the compression chamber 40 is installed in the cylinder head 21, it is inserted between the suction muffler 32 and the cylinder head 21 before the coupling thereof. A suction pipe 31 to be coupled is provided. The suction pipe 31 is formed by separating two flow paths from the inlet portion thereof, and at the lower portion thereof, the two isolated flow paths communicate with each other to face the refrigerant discharge port 24. A refrigerant suction muffler 32 is installed at the inlet of the suction pipe 31. The suction muffler 32 is provided with the upper shielding chamber 33 and the lower shielding chamber 34 separated from each other by the shielding plate 41 to communicate with each other by one guide tube 54. A coolant inlet 36 is formed at one side of the upper shielding chamber 33 in the suction muffler 32, and a coolant inlet pipe 29 communicates with the coolant inlet 36. In addition, an oil discharge port 37 is formed at the other side of the upper shielding chamber 33 so that oil in the refrigerant introduced into the underground direction is separated and flows down to the bottom of the sealed container for recovery. In addition, the lower shielding chamber 34 has an intermediate portion thereof open to allow the refrigerant suction pipe 31 to communicate with each other, and oil in the refrigerant introduced into the lower shielding chamber 34 is separated from the refrigerant by opening in both sides at the underground direction. Another oil discharge port 37 is formed to be recovered to the bottom of the sealed container 10.

In the conventional reciprocating compressor configured as described above, when the external power is applied and the rotating shaft 15 rotates by the magnetic field generated between the stator 13 and the rotor 14, the eccentric shaft 17 is eccentrically rotated accordingly. . The eccentric rotation of the eccentric shaft 17 causes the piston 19 to reciprocate linearly in the compression chamber 40, and the refrigerant flows into the suction pipe 31 through the suction muffler 32 to block the cylinder block 20. Into the compression chamber 40 of the). The refrigerant introduced into the compression chamber 40 is compressed to high pressure and is discharged to the refrigeration cycle through the refrigerant outlet pipe 30. On the other hand, the oil in the bottom of the sealed container 10 is raised by the oil pick-up 18 by the rotational drive of the eccentric shaft 17 and supplied to the sliding part of the rotation shaft 15 to cool and lubricate the cylinder. It is sucked by the suction force acting on the compression chamber 40 through the oil supply pipe 38 coupled to the head 21 is introduced into the compression chamber 40. At this time, the oil introduced into the compression chamber 40 is introduced into the suction muffler 32 after circulating the refrigeration cycle with the refrigerant, and the oil discharge port formed in the suction muffler 32 separated from the refrigerant in the suction muffler 32 ( Through 37) it is recovered to the bottom of the sealed container (10) again.

In the refrigerant suction structure of the conventional reciprocating compressor, the suction pipe 31 is divided into two passages, so that refrigerant flowing into the suction pipe 31 through the suction muffler 32 is formed at the inlet of the suction pipe 31. Due to the flow resistance, the mass of the refrigerant flowing into the compression chamber 40 inside the cylinder block 20 is small, so that the circulation efficiency of the refrigerant decreases, and the refrigerant guide tube 54 of the suction muffler 32 is connected to one tube. It is provided that the outlet is directed toward the refrigerant suction pipe 31 has a problem that the flow direction of the refrigerant gas is extremely limited, and the oil is not easily recovered through the oil discharge port 37.

The present invention is to solve the above problems, the object of the present invention is to improve the suction efficiency of the refrigerant by improving the suction pipe and at the same time to improve the refrigerant guide tube of the suction muffler to facilitate the recovery of oil in the refrigerant It is to provide a homogeneous compressor.

1 is a cross-sectional view showing the internal configuration of a typical reciprocating compressor.

Figure 2 is a side cross-sectional view showing the internal structure of a conventional suction muffler.

3 is a cross-sectional view showing the internal structure of the suction muffler according to the present invention.

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

10. Airtight container 15 ... Rotating shaft

19 ... piston 20 ... cylinder block

22 ... Valve plate 27 ... Suction valve

28.Discharge valve 40 ... Compression chamber

50 Suction muffler 51 Suction tube

52.Upper shield room 53 ... Lower shield room

60 cylinder head 65 shield plate

In order to achieve the above object, the present invention provides a sealed container in which oil is stored at a bottom thereof, a cylinder block formed in the sealed container and having a compression chamber formed therein, and noise generated by a refrigerant flowing into the compression chamber from the outside of the sealed container. A suction muffler for shielding the oil, an oil discharge port for guiding oil separated from the refrigerant sucked in the suction muffler to the bottom of the sealed container, and a suction pipe interposed between the suction muffler and the compression chamber to guide the refrigerant to the compression chamber. In the reciprocating compressor,

The suction muffler is partitioned into an upper shielding chamber communicating with a flow path through which refrigerant flows and a lower shielding chamber communicating with the suction pipe, and the upper shielding chamber and the lower shielding chamber communicate with each other by a plurality of guide passages for guiding the refrigerant. It is characterized by.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the drawings. 3 is a cross-sectional view showing the internal structure of the suction muffler according to the present invention. The same parts as in the related art, which are not shown, will be described with reference to FIG. 1. As shown therein, the reciprocating compressor according to the present invention is coupled to the upper container 11 and the lower container 12 to receive the driving unit and power to generate power inside the hermetically sealed container 10 to suck the refrigerant. Compression unit for compressing by compression, the bottom of which is stored oil for lubricating and cooling each sliding part.

The driving unit includes a stator 13 having a coil wound to generate a magnetic field by applying external current, and a rotor 14 provided inside the stator 13 to rotate under the influence of a magnetic field generated by the stator 13. Installed. The rotary shaft 15 is press-installed in the rotor 14 and rotates together with the rotor 14. The rotary shaft 15 is installed under the rotor 14 and is supported by a support bearing 16 for supporting the rotary drive of the rotary shaft 15. And the lower end of the rotating shaft 15 is provided with an eccentric shaft 17 eccentrically coupled to the rotating shaft 15. On the other hand, at the lower end of the eccentric shaft 17, an oil pick-up 18 is installed to be inclined and inclined with respect to the eccentric shaft 17 to pump oil accumulated in the bottom of the sealed container 10 to the sliding part of the driving unit.

The compression unit is provided with a cylinder block 20 forming a compression chamber 40 therein and a piston 19 for linearly reciprocating the inside of the compression chamber 40 of the cylinder block 20. The piston rod 39 is installed vertically coupled to the rotation shaft 15 on one side of the eccentric shaft 17. In addition, the cylinder block 20 is coupled to the cylinder head 60 coupled to the suction chamber 62 and the discharge chamber 63, and is separated between the cylinder head 60 and the cylinder block 20, and suctioned. The valve plate 22 and the discharge valve 28 are provided in the inlet port 23 and the discharge port 24, respectively. Meanwhile, a suction muffler 50 is installed in the cylinder head 60 to shield the noise of the refrigerant flowing into the compression chamber 40, and is inserted between the suction muffler 50 and the cylinder head 60 before the coupling thereof. The suction pipe 51 is provided to be coupled. The suction pipe 51 has one flow passage therein, and a refrigerant outlet is formed at the lower portion thereof. In addition, a refrigerant suction muffler 50 is installed at an inlet of the suction pipe 51. The suction muffler 50 is provided with the upper shielding chamber 52 and the lower shielding chamber 53 separated from each other by the shielding plate 65 so as to communicate with each other by the two guide tubes 54. The guide pipe 54 is provided so that each outlet center is located at both ends of the refrigerant suction pipe 31. In the suction muffler 50, one side of the upper shielding chamber 52 is provided with a refrigerant inlet 56 communicating with the refrigerant inlet pipe 64. When the oil in the refrigerant introduced from the refrigeration cycle flows into the suction muffler 50 and is separated in the other side of the upper shielding chamber 52, the separated oil is recovered to the bottom of the sealed container 10. An oil discharge port 57 is provided. In the lower shielding chamber 53, the middle part of the lower shielding chamber 53 is opened to allow the refrigerant suction pipe 51 to communicate with each other. Another oil discharge port 57 is formed to be recovered to the bottom of the sealed container 10.

The drive of the reciprocating compressor according to the present invention configured as described above, when the external shaft power is applied and the rotary shaft 15 is rotated by the magnetic field generated between the stator 13 and the rotor 14, the eccentric shaft 17 accordingly Eccentric rotation. The eccentric rotation of the eccentric shaft 17 causes the piston 19 to reciprocate linearly in the compression chamber 40, and the refrigerant flows into the suction pipe 51 through the suction muffler 50, thereby providing a cylinder block 20. Into the compression chamber 40 of the). The refrigerant introduced into the compression chamber 40 is compressed to high pressure and is discharged to the refrigeration cycle through the refrigerant outlet pipe 30. On the other hand, the oil of the bottom of the sealed container 10 is raised by the oil pit 18 by the rotational drive of the eccentric shaft 17, and is supplied to the sliding part of the rotary shaft 15 to cool and lubricate the cylinder. Through the oil supply pipe 58 coupled to the head 60 is sucked by the pressure difference generated by the suction force acting on the compression chamber 40 is introduced into the compression chamber 40. At this time, the refrigerant introduced into the compression chamber 40 is circulated through the refrigeration cycle with the refrigerant and then introduced into the suction muffler 50 together with the refrigerant, and separated from the refrigerant in the suction muffler 50 and formed in the suction muffler 50. The oil discharge port 57 is recovered to the bottom of the sealed container 10 again.

In particular, the refrigerant mixed with the oil introduced into the suction muffler 50 of the compressor and introduced into the suction pipe 31 passes through one flow path having a wide cross section, so that the center of the refrigerant flow path is blocked like the conventional suction pipe 31. As a result, the flow resistance is significantly reduced as compared with the case of passing through two flow paths. That is, by increasing the mass of the refrigerant discharged from the compressor can contribute to the improvement of the efficiency of the refrigeration cycle. In addition, since the centers of the two guide pipes 54 are configured to be spaced apart from the cross-sectional center of the suction pipe 51, the formation of the coolant flow path as well as separation of oil from the coolant can be easily performed.

The suction muffler of the reciprocating compressor having a suction pipe as in the present invention reduces the flow resistance when the refrigerant flows, so that the refrigerant flows more smoothly, thereby increasing the mass of the refrigerant flowing into the cylinder. It contributes to the improvement of efficiency, and furthermore, the separation of oil from the refrigerant introduced into the suction muffler proceeds more easily, thereby improving the oil recovery efficiency.

Claims (3)

A sealed container in which oil is stored at a bottom thereof, a cylinder block built in the sealed container, and a compression block formed therein, a suction muffler shielding noise generated by the refrigerant flowing into the compression chamber from the outside of the sealed container, the suction muffler In the reciprocating compressor having an oil discharge port for guiding the oil separated from the formed and sucked refrigerant to the bottom of the sealed container, the suction pipe interposed between the suction muffler and the compression chamber to guide the refrigerant to the compression chamber, The suction muffler 50 is divided into an upper shielding chamber 52 communicating with a flow path into which a refrigerant flows and a lower shielding chamber 53 communicating with the suction pipe 53, and provided with the upper shielding chamber 52. The lower shielding chamber (53) is reciprocating compressor, characterized in that the communication with each other by a plurality of guide passages for guiding the refrigerant. 2. The two guide flow paths of claim 1, wherein the discharge center is located at the side end of the suction pipe (51) so that the oil in the refrigerant flowing therein can be separated from the refrigerant by hitting the end of the suction pipe (51). Reciprocating compressor comprising a guide tube (54) of. 3. The reciprocating compressor according to claim 1 or 2, wherein the suction pipe (51) forms one flow path.