KR100195446B1 - Reciprocating compressor - Google Patents

Abstract

The present invention relates to a reciprocating compressor, and the reciprocating compressor according to the present invention is sucked into a sealed container (50) in which oil is stored at the bottom and a suction pipe (66) and a suction pipe (66) for guiding a refrigerant into the sealed container (50). A compression chamber (not shown) for compressing the refrigerant, and an oil supply pipe 64 for guiding oil suction to lubricate the compression chamber, and a discharge tube 67 for guiding discharge of the refrigerant compressed in the compression chamber. . One side of the sealed container 50 includes a separating means for separating oil in the refrigerant discharged into the discharge tube 67, a storage means for storing the oil separated from the separating means, and an oil stored in the storage means. 50) An oil separation device including a guide means for guiding the inside is provided.

The reciprocating compressor according to the present invention as described above is provided so that oil in the refrigerant discharged from the compressor can be collected into the compressor again without being introduced into the refrigeration cycle, so that only pure refrigerant is circulated inside the refrigeration cycle, thereby freezing. The refrigeration efficiency of the cycle can be improved and the sludge generated in the compression chamber can be collected.

Description

Reciprocating compressor

The present invention relates to a reciprocating compressor, and more particularly, to an oil separation device of a reciprocating compressor to more effectively separate the oil supplied to the drive unit of the compressor.

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.

First, a brief description of the general refrigeration cycle with reference to Figure 1 refrigeration cycle is roughly provided as an evaporator (30) for heat-exchanging the refrigerant discharged from the compressor, the condenser (31) and the condenser (31), in the evaporator (30) The heat exchanged refrigerant is introduced into the compressor 32 again. In the refrigeration cycle of the conventional reciprocating compressor, as shown in Figure 2, the upper container 11 and the lower container 12 is coupled to the sealed container 10 is provided, the sealed container 10 is provided The refrigerant suction pipe 26 and the discharge pipe 27 are in communication with each other, and is composed of a drive unit for generating power in the sealed container 10 and a compression unit for receiving and compressing the refrigerant by receiving power, the bottom of each Oil is stored to lubricate and cool the 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 formed on 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 peripheral surface 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 21 having a compression chamber (not shown) and a piston 20 for linearly reciprocating the inside and the left of the compression chamber of the cylinder block 21. The piston 20 is vertically coupled to the eccentric shaft 17 by the piston rod 19. A cylinder head 22 coupled to the cylinder block 21 having a suction chamber and a discharge chamber is coupled to the cylinder block 21, and is disposed between the cylinder head 22 and the cylinder block 21 to form a suction valve (not shown) and a discharge valve ( A valve plate 23 provided with a not shown) is provided. In addition, a suction muffler 25 is installed in the cylinder head 22 to remove the noise of the refrigerant flowing into the compression chamber through the suction pipe 26, and between the suction muffler 25 and the cylinder head 22 before the combination thereof. It is provided with a suction pipe 26 is inserted into. The suction muffler 25 is provided with an oil discharge port (not shown) for separating the oil in the refrigerant introduced into the underground direction and flowing down to the bottom of the sealed container 10 for recovery.

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 20 to reciprocate linearly in a compression chamber (not shown) so that the refrigerant flows into the compression chamber of the cylinder block 21 through the suction muffler 25. do. The refrigerant introduced into the compression chamber is compressed to high pressure and is discharged into the refrigerating cycle through the discharge pipe 27. 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. Through the oil supply pipe 24 coupled to the head 22 is sucked by the suction force acting on the compression chamber is introduced into the compression chamber. At this time, the oil introduced into the compression chamber is introduced into the suction muffler 25 after circulating a refrigeration cycle with the refrigerant, and the oil discharge port (not shown) formed in the suction muffler 25 separated from the refrigerant in the suction muffler 25. Through the sealed container 10 is recovered again.

In the conventional reciprocating compressor, the lubricating oil introduced into the compression chamber is introduced into the refrigeration cycle and circulated together with the refrigerant. The circulating oil cools the refrigerant by shortening the amount of refrigerant in the evaporator 30. The speed drops, which causes a fatal damage to the air conditioning performance of the refrigerant, which greatly reduces the efficiency of air conditioning. In addition, when a large amount of sludge generated in the compression chamber of the reciprocating compressor is discharged and accumulated in the flow path of the refrigerant or part of the oil path by the sludge, the circulation of the refrigerant and the circulation of the oil may be enormously disrupted. There is a problem that the life of the compressor is shortened.

The present invention is to solve the above problems and an object of the present invention is to separate the oil introduced into the compression chamber for the lubrication of the compression chamber and discharged with the refrigerant from the refrigerant to be collected back into the sealed container refrigerant It is to provide a reciprocating compressor having an oil separation device to prevent the circulation of the inside of the refrigeration cycle.

Still another object of the present invention is to provide a reciprocating compressor equipped with an oil separation device having an oil purification function to purify a refrigerant compressed in a compression chamber and discharged together with oil to circulate a refrigeration cycle.

1 is a circuit diagram showing a general refrigeration cycle.

2 is a cross-sectional view showing a general reciprocating compressor.

3 is a circuit diagram showing a refrigeration cycle according to the present invention.

4 is a sectional view showing a reciprocating compressor according to the present invention.

5 is a cross-sectional view showing an oil separation device according to the present invention.

FIG. 6 is a detailed cross-sectional view of A-part of FIG.

7 is a plan sectional view showing the inside of a sealed container in the reciprocating compressor according to the present invention.

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

50 ... Airtight container 53 ... Stator

54. Rotor 55 ... Rotation axis

58 Oil pick-up 61 Cylinder block

64 oil supply case

71 Separation chamber 72 Purification chamber

73.Partition 74,75,76 ... Net

77 ... Float 81 ...

In order to achieve the above object, a reciprocating compressor according to the present invention includes a sealed container having oil accumulated at a bottom thereof, a suction pipe guiding a refrigerant into the sealed container, a piston configured to compress the refrigerant sucked into the suction pipe, and the piston. In the reciprocating compressor having a cylinder block having a compression chamber to linearly reciprocate therein, an oil supply pipe for guiding the oil to lubricate the compression chamber, and a discharge tube for guiding discharge of the refrigerant compressed in the compression chamber. In

One side of the sealed container has a separating means for separating the oil in the refrigerant discharged into the discharge tube, a storage means for storing the oil separated from the separating means, and guides the oil stored in the storage means into the sealed container. It is characterized in that the oil separation device including a guide means to be provided.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the drawings. 3 is a circuit diagram showing a refrigeration cycle in which the reciprocating compressor to which the present invention is applied is installed. 4 is a cross-sectional view showing a reciprocating compressor according to the present invention, Figure 5 is a cross-sectional view showing an oil separation device according to the present invention. And Figure 6 is a detailed cross-sectional view showing the A-part of Figure 4, Figure 7 is a plan sectional view showing the inside of the sealed container in the reciprocating compressor according to the present invention.

As shown therein, the reciprocating compressor according to the present invention receives the driving unit and the power generating power inside the hermetically sealed container 50 by combining the upper container 51 and the lower container 52 to suck the refrigerant. And a suction unit 66 for supplying a refrigerant to the compression unit and a discharge tube 67 for guiding the compressed refrigerant to a refrigeration cycle. And the bottom of the sealed container 50 is stored oil for lubricating and cooling each sliding part. And an oil separation device is installed to collect the oil supplied to the supplied compression section back to the sealed container (50).

First, the driving unit is a stator 53 in which a coil is wound so as to generate a magnetic field by applying external current, and a rotor that is provided inside the stator 53 and rotates under the influence of a magnetic field generated by the stator 53. 54 is provided, and an eccentric shaft 57, which is press-fitted to the rotor 54 and rotates and drives together with the rotor 54, is eccentrically coupled to the rotation shaft 55. Is provided. In addition, an oil pick-up 58 is installed at a lower end of the eccentric shaft 57 to be inclined and inclined with respect to the eccentric shaft 57 to pump oil accumulated in the bottom of the sealed container 50. On the other hand, the lower portion of the rotor 54 of the outer circumferential surface of the rotary shaft 55 is provided with a support bearing 56 for supporting the rotary drive of the rotary shaft 55. The compression unit includes a cylinder block 61 including a compression chamber and a piston 60 linearly reciprocating the inside of the compression chamber of the cylinder block 61. The piston 60 is vertically coupled to the eccentric shaft 57 by the piston rod 59. A cylinder head 62 having a suction chamber (not shown) and a discharge chamber (not shown) is coupled to the cylinder block 61, and is disposed between the cylinder head 62 and the cylinder block 61 to be sucked. A valve plate 63 provided with a valve (not shown) and a discharge valve (not shown) is provided. In addition, a suction muffler 65 is installed in the cylinder head 62 to remove noise from the refrigerant flowing into the compression chamber. An oil discharge port (not shown) is formed in the suction muffler 65 so that oil in the refrigerant introduced into the underground direction is separated and flows down to the bottom of the sealed container 50 to be recovered. In addition, the oil supply pipe 64 communicates with the suction part of the cylinder head 62 to supply the oil of the bottom of the sealed container 50 with the suction force generated in the compression chamber.

On the other hand, the oil separator is first connected to the discharge tube 67 discharged through the compression chamber, separating means for separating the oil in the refrigerant discharged into the discharge tube 67 and the storage means for storing the oil separated from the separating means And, and guide means for guiding the oil stored in the storage means into the sealed container (50).

First, the storage means is provided with a case 70, which is coupled to the outer surface of the sealed container 50 and connected to the discharge side tube 83 and the discharge tube 67 of the sealed container 50, is installed, In the case 70, an oil separating means and an oil storage unit are partitioned by a partition plate 73, and a part of the partition plate 73 filters the oil separated from the separating means to the oil storage unit of the case 70. Guide meshes 74 are provided. And the oil guide means is installed at the bottom of the oil reservoir, namely the case 70.

On the other hand, the oil separating means purifies the refrigerant discharged from the oil separation chamber 71 communicating with the inflow side pipe 84 extending into the case 70 and separated from the oil in the separation chamber 71, and the refrigerant discharge side pipe 83 It is provided to the purification chamber 72 to guide the () to the refrigerant purified by the refrigeration cycle. In the separation of the refrigerant in the separation chamber 71, the bottom surface of the separation chamber 71 is opened to form a mesh 75 on the opening surface, whereby the refrigerant introduced into the separation chamber 71 is transferred to the mesh 75. The oil is separated from the oil and is discharged, and the filtered oil is collected at the bottom of the case 70. In addition, the purification chamber 72 is provided with a mesh 76 provided at an inlet portion thereof to filter again the refrigerant separated from the oil in the separation chamber 71 and is opened to guide and discharge the refrigerant through a refrigeration cycle. Accordingly, the oil not separated in the separation chamber 71 is filtered again in the purification chamber 72 so that the purer refrigerant may be circulated to the refrigeration cycle. In addition, sludge suspended together with oil in the refrigerant is filtered by the nets 75 and 76 provided in the purification chamber 72 and the separation chamber 71.

And the oil guide means for guiding the oil collected in the bottom of the case 70 to the bottom of the sealed container 50, the inlet end is in communication with the bottom of the case 70 and the outlet end is collected to extend to the bottom of the sealed container 50 It is provided with a tube (81). Opening and closing means are provided at the inlet end of the collection pipe 81 to open and close the inlet, and the opening and closing means is floated in accordance with the flow rate of oil collected into the opening and closing plate 79 and the case 70. It is provided with a float (77) to operate, and the float (77) and the opening and closing plate (79) is provided with a support (78) hingedly supported. In addition, the inlet portion of the collection pipe 81 extending into the sealed container 50 communicates with the collection pipe 81 and the oil supply pipe 64 so that the suction force generated in the oil supply pipe 64 affects the collection pipe 81. The connecting member 80 is provided. The connecting member 80 is provided in a spherical shape in which the collecting pipe 81 and the oil supply pipe 64 are coupled to each other, and one side of the connecting member 80 communicates with the inside of the sealed container 50 and the connecting member 80. When the communication hole 85 is provided and the inlet of the collecting pipe 81 is opened, the oil collected in the case 70 is introduced into the sealed container 50 by the suction force generated in the oil supply pipe 64. In addition, the communication hole 85 is provided with a guide tube 82 to allow oil to smoothly flow into and out of the connection member 80.

In the reciprocating compressor according to the present invention configured as described above, when the external shaft is rotated by the magnetic field generated between the stator 53 and the rotor 54, the eccentric shaft 57 rotates accordingly. Done. By the eccentric rotation of the eccentric shaft 57, the piston 60 is left and right linear reciprocating movement in the compression chamber, the refrigerant is introduced into the compression chamber of the cylinder block 61 through the suction muffler (25). The refrigerant introduced into the compression chamber is compressed to high pressure and flows out into the refrigerating cycle through the discharge pipe 67. On the other hand, the oil in the bottom of the sealed container 50 rises by the oil pick-up 58 by the rotational drive of the eccentric shaft 57, and is supplied to the sliding part of the rotation shaft 55 to perform cooling and lubrication. Through the oil supply pipe 64 coupled to the head 62 is sucked by the suction force acting on the compression chamber is introduced into the compression chamber, the oil is discharged with the refrigerant by the compression action of the piston (60). The discharged refrigerant is guided along the discharge tube 67 to the case 70 of the oil separator, and then guided to the separation chamber 71. The refrigerant discharged into the separation chamber 71 is discharged from the separation chamber 71 through the mesh 75 of the separation chamber 71. At this time, the oil suspended in the refrigerant is filtered out of the mesh 75 to separate the partition plate 73. Drop into the net (74). Subsequently, it passes through the mesh 75 in the partition plate 73 and is collected in the bottom storage chamber of the case 70. Meanwhile, the refrigerant separated in the separation chamber 71 continues to flow into the purification chamber 72. When the refrigerant flows into the purification chamber 72, the oil and the oil are re-applied by the net 76 provided in the purification chamber 72. After the foreign matter such as sludge is filtered and introduced into the purification chamber 72, the pure refrigerant is discharged to the refrigeration cycle outside the case 70. On the other hand, the oil is collected at the bottom of the case 70 and the oil level of the oil rises as the amount thereof increases, causing the floating cylinder 77 to float, and the opening and closing plate 79 is caused by the floating of the floating cylinder 77. The inlet portion of the collection pipe 81 is opened so that the oil is guided and collected by the collection pipe 81 into the sealed container 50. When the oil level is lowered to some extent, the floating cylinder 77 is dropped again, and the opening and closing plate 79 closes the collection pipe 81. On the other hand, when the collection pipe 81 is opened, the connection member 80 generates a forced suction force by the suction force generated in the oil supply pipe 64 by the driving of the compressor, and by this suction force, the collection of oil is made easier. do. As shown in FIG. 3, the refrigeration cycle including the reciprocating compressor is provided such that oil in the refrigerant discharged from the compressor is collected back into the compressor 92 without circulating inside the refrigeration cycle. The evaporator 90 and the condenser are provided. By supplying only the pure refrigerant to the (91) to improve the operating efficiency of the refrigerant.

The reciprocating compressor according to the present invention as described above is provided so that oil in the refrigerant discharged from the compressor does not flow into the refrigeration cycle, but is collected to the compressor again, so that only the pure refrigerant is circulated inside the refrigeration cycle to improve the refrigeration efficiency. It is possible to improve, and also to collect the sludge generated in the compression chamber there is an effect that can prevent the shortening of the compressor according to this.

Claims (9)

A sealed container in which oil is accumulated at its bottom, a suction pipe for guiding the refrigerant into the sealed container, a piston configured to compress the refrigerant sucked into the suction pipe, a cylinder block having a compression chamber so that the piston reciprocates linearly therein, A reciprocating compressor having an oil supply pipe for guiding suction of oil to lubricate the compression chamber, and a discharge pipe for guiding discharge of refrigerant compressed in the compression chamber, One side of the sealed container 50, the separating means for separating the oil in the refrigerant discharged into the discharge tube 67 and the storage means for storing the oil separated from the separating means, and the oil stored in the storage means Reciprocating compressor characterized in that the oil separation device including a guide means for guiding the inside of the sealed container 50 is provided. The reciprocating compressor according to claim 1, wherein the storage means is provided with a case (70) coupled to an outer surface of the sealed container (50). According to claim 1 or 2, wherein the separating means is installed in the case 70, the separation chamber 71 in communication with the discharge tube 67, And a net (75) provided at a lower end face of the separation chamber (71) to filter oil in the refrigerant discharged from the discharge pipe (67). The purifying chamber (72) of claim 3, wherein the case (70) is provided with a purging chamber (72) provided with a net (76) on the refrigerant inlet side to purify and discharge the refrigerant discharged from the separation chamber (71) to the refrigeration cycle. Reciprocating compressor, characterized in that. The method of claim 1, wherein the guide means comprises a collection tube 81 and the opening and closing means for opening and closing the collection tube 81 and the bottom of the sealed container 50 and the case 70 is in communication. Reciprocating compressor. The method of claim 5, wherein the opening and closing means support 78 is coupled to the bottom of the case 70, Opening and closing plate 79 is hinged to one side of the support 78 to open and close the collection pipe 81, Reciprocating, characterized in that coupled to the other side of the support 78 is provided with a floating cylinder (77) floating on the oil level of the floating plate (77) is operated so that the floating cylinder 77 rises Homogeneous compressor. According to claim 3, wherein the case 70 is provided with a storage unit for storing the oil and the partition plate 73 for partitioning the separation chamber 71, the net 76 of the separation chamber 71 A portion of the partition plate 73 corresponding to and is characterized in that the mesh 74 for guiding the oil separated from the separation chamber 71 to the bottom of the case 70 is installed. According to claim 5, wherein the inlet portion of the collection pipe 81 extending inwardly of the sealed container 50 communicates with the collection pipe 81 and the oil supply pipe 64 in the oil supply pipe (64) Reciprocating compressor, characterized in that the connection member 80 is provided so that the suction force generated to the collecting pipe (81). The method of claim 8, wherein the connecting member 80 is provided in a spherical shape through which the collection pipe 81 and the oil supply pipe 64 is coupled through, One side of the connecting member 80, the reciprocating compressor, characterized in that the communication hole 85 is provided to communicate the interior of the sealed container 50 and the connecting member (80).