KR20080033745A - Hermetic compressor - Google Patents

Abstract

A hermetic type compressor is provided to reduce noise caused by an intake valve and an exhaust valve. A hermetic type compressor comprises a cylinder block, a piston, a cylinder head, a valve plate(40), and an impact reduction device. The valve plate includes an intake valve(43) provided between the cylinder block and the cylinder head to intermit refrigerant flow to be entered into a compressor chamber, and an exhaust valve to intermit the refrigerant flow to be exhausted from the compressor chamber. The impact reduction device includes a first impact reduction device(51) generating force in a direction, which is opposed to the moving direction of the intake valve, and a second impact reduction device generating force in a direction, which is opposed to the moving direction of the exhaust valve.

Description

Hermetic Compressor

1 is a cross-sectional view showing a schematic configuration of a hermetic compressor according to the present invention.

Figure 2 is an enlarged view of the valve device in FIG.

3 and 4 are perspective views of a first impact reduction device according to a first embodiment to reduce the impact of the suction valve.

5 is a perspective view of a first impact reduction device according to a second embodiment to reduce the impact of the intake valve.

6 is a perspective view of a second impact reduction device according to the first embodiment to reduce the impact of the discharge valve.

7 is a perspective view of a second impact reduction device according to a second embodiment to reduce the impact of the discharge valve.

Explanation of symbols on the main parts of the drawings

1: hermetic container 30: valve device

40: valve plate 41: suction hole

42: discharge hole 43: suction valve

44: discharge valve 51: first impact reduction device

52: second impact reduction device 61, 63, 64: permanent magnet

62: coil

The present invention relates to a hermetic compressor, and more particularly to a hermetic compressor that can reduce the impact of the suction valve and the discharge valve when the suction valve and the discharge valve is opened and closed.

BACKGROUND ART Generally, a hermetic compressor includes a hermetic container forming a hermetic space, a compression device for compressing a refrigerant inside the hermetic container, and a driving device for driving the compression device.

The drive device provides a driving force to the compression device, and includes a stator fixed inside the sealed container and a rotor installed spaced apart from the inside of the stator so that the stator electromagnetically interacts with the stator to act as a single motor. do.

The compression device is coupled to a cylinder block forming a compression chamber in which a refrigerant is compressed, a piston for linearly reciprocating inside the compression chamber and compressing the refrigerant, and coupled to one side of the cylinder block to seal the compression chamber, and a suction chamber and a discharge chamber are formed. And a valve unit provided between the cylinder head and the cylinder block and the cylinder head to regulate a flow of the refrigerant sucked into the compression chamber from the suction chamber or discharged from the compression chamber to the discharge chamber.

When the driving device is driven through this configuration, the piston makes a linear reciprocating motion in the compression chamber. Through this, the refrigerant outside the sealed container is introduced into the suction chamber of the cylinder head, and then delivered to the compression chamber and compressed in the compression chamber. The refrigerant compressed in the compression chamber is discharged to the discharge chamber of the cylinder head and then discharged to the outside of the sealed container through the discharge tube. This process is repeated to compress the refrigerant through the compressor.

Here, the valve device includes a valve plate having suction and discharge holes formed therein such that the compression chamber communicates with the suction and discharge chambers, a suction valve for opening and closing the suction hole, and a discharge valve for opening and closing the discharge hole.

The suction valve and the discharge valve are designed to open the suction hole and the discharge hole smoothly in accordance with the movement of the piston during the suction and discharge stroke of the hermetic compressor.

When the piston is lowered and the pressure in the compression chamber is lowered, the suction valve opens the suction hole and the refrigerant is sucked into the compression chamber. When the piston is raised and the pressure in the compression chamber is increased, the discharge valve opens the discharge hole and the refrigerant is released into the compression chamber. Is discharged from.

In the suction and discharge processes of the compressor, the refrigerant flows at a high speed through a narrow flow path, and thus the suction valve and the discharge valve vibrate at natural frequencies due to the flow of the refrigerant. The vibration of the suction valve and the discharge valve generated in this way is transmitted to the outside of the sealed container to form noise.

The suction valve is closed at a high speed during the refrigerant discharge during the discharge of the refrigerant. At this time, the suction valve collides with the valve plate to cause noise, and the suction valve and the discharge valve are damaged due to a large impact. do.

The present invention is to solve such a problem, it is an object of the present invention to provide a hermetic compressor that can reduce the noise caused by the intake valve and the discharge valve.

Still another object of the present invention is to provide a hermetic compressor which can prevent the intake valve and the discharge valve from being damaged by hitting the valve plate strongly.

The hermetic compressor according to the present invention for achieving the above object is a cylinder block in which a compression chamber is formed, a piston moving forward and backward in the compression chamber, a cylinder head coupled to one side of the cylinder block to seal the compression chamber, and A hermetic compressor having a valve plate provided between a cylinder block and a cylinder head, the valve having a suction valve for regulating the flow of refrigerant sucked into the compression chamber and a discharge valve for regulating the flow of refrigerant discharged from the compression chamber. It is provided with an impact reducing device for generating a force in a direction opposite to the direction in which the valve and the discharge valve move.

In addition, the impact reduction device includes a first impact reduction device for generating a force in a direction opposite to the direction in which the suction valve is moved and a second impact reduction device for generating a force in a direction opposite to the direction in which the discharge valve is moved. do.

In addition, the first impact reduction device has a permanent magnet formed in the valve plate is inserted into, and installed in the suction hole which is a passage for the refrigerant is sucked into the compression chamber, the suction valve is a non-magnetic metal.

In addition, the first impact reduction device has a coil formed in the valve plate is inserted into the suction hole which is a passage through which the refrigerant is sucked into the compression chamber is installed, the suction valve is a magnetic material.

In addition, the second shock reduction device includes a permanent magnet formed in the valve plate and inserted into and installed in a discharge hole which is a passage through which the refrigerant is discharged from the compression chamber, and the discharge valve is a nonmagnetic metal.

The second impact reducing device includes a coil formed in the valve plate and inserted into and installed in a discharge hole that is a passage through which refrigerant is discharged into the compression chamber. The discharge valve is a magnetic material.

In addition, the second impact reduction device is provided with a permanent magnet installed in the cylinder head, the discharge valve is a non-magnetic metal.

Hereinafter, a hermetic compressor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the hermetic compressor according to an embodiment of the present invention has an hermetic container 1 formed by combining an upper container 1a and a lower container 1b, and inside the hermetic container 1. It is provided with a compression device 10 for compressing the refrigerant, and a drive device 20 for providing power to the compression device (10). At one side and the other side of the sealed container 1, a suction pipe 2 for guiding external refrigerant into the sealed container 1 and a discharge tube for discharging the refrigerant compressed by the compression device 10 to the outside of the sealed container 1 ( 3) are provided respectively.

The dual compression device 10 includes a cylinder block 11 forming a compression chamber 11a in which a refrigerant is compressed, a piston 12 linearly reciprocating in the compression chamber 11a and compressing the refrigerant, and a compression chamber ( A cylinder head 13 coupled to one side of the cylinder block 11 to seal 11a and provided between the cylinder block 11 and the cylinder head 13 in which a suction chamber 13a and a discharge chamber 13b are partitioned. And a valve device 30 for interrupting the flow of the refrigerant sucked into the compression chamber 11a from the suction chamber 13a or discharged from the compression chamber 11a to the discharge chamber 13b.

The driving device 20 provides a driving force for the piston 12 to reciprocate in the compression chamber 11a, and includes a stator 21 and a stator 21 fixed inside the sealed container 1. The rotor 22 is provided to be spaced apart from the inside of the stator 21 to electromagnetically interact. A rotating shaft 23 is provided at the center of the rotor 22 so as to be interlocked with the rotor 22, and an eccentric portion 24 for eccentric rotation and an eccentric portion 24 are provided below the rotating shaft 23. One end of the connecting rod 25 is rotatably coupled to the eccentric portion 24 and the other end of the piston 12 is rotatably coupled to the linear movement so as to convert the eccentric rotation into a linear movement.

When power is applied to the hermetic compressor, the rotating shaft 23 rotates together with the rotor 22 by the electrical interaction between the stator 21 and the rotor 22, and the eccentric portion 24 and the connecting rod. The piston 12 connected to the rotating shaft 23 through 25 is linearly reciprocated in the compression chamber 11a. Through this, the refrigerant outside the sealed container 1 flows into the suction chamber 13a of the cylinder head 13 from the suction pipe 2 and then is transferred to the compression chamber 11a to be compressed in the compression chamber 11a. The refrigerant compressed in the compression chamber 11a is discharged to the discharge chamber 13b of the cylinder head 13 and then discharged to the outside of the sealed container 1 through the discharge tube 3.

Meanwhile, as shown in FIG. 2, the valve device 30 communicates the compression chamber 11a of the cylinder block 11 with the suction chamber 13a and the discharge chamber 13b of the cylinder head 13, respectively. A valve plate 40 having a suction hole 41 and a discharge hole 42 is provided. A suction valve 43 for opening and closing the suction hole 41 is assembled on one surface of the cylinder block 11 side of the valve plate 40, and a discharge hole 42 is provided on the other surface of the cylinder head 13 side of the valve plate 40. The discharge valve 44 for opening and closing the assembly is assembled.

The suction valve 43 opens the suction hole 41 when the piston 12 moves downward and the pressure inside the compression chamber 11a becomes low, and the piston 12 moves upward, so that the inside of the compression chamber 11a moves. When the pressure increases, the suction hole 41 is closed to the compression chamber 11a side, and the discharge valve 44 discharges when the piston 12 moves upward and the pressure inside the compression chamber 11a becomes high. When the ball 42 is opened and the piston 12 moves downward to lower the pressure inside the compression chamber 11a, it is provided on the discharge chamber 13b side to close the discharge hole 42.

On the other hand, in the hermetic compressor according to the present invention, when the suction valve 43 opens the suction hole 41 and the discharge valve 44 opens the discharge hole 42, the suction valve 43 and the discharge valve 44 are separated. When the suction valve 43 closes the suction hole 41 and the discharge valve 44 closes the discharge hole 42, the suction valve 43 and the discharge valve 44 reduce the noise caused by vibration. An impact reducing device is provided to prevent the valves 43 and 44 from being damaged due to the strong collision with the 40.

The shock reduction device is provided in a direction opposite to the direction in which the intake valve 43 and the discharge valve 44 move when the intake valve 43 and the discharge valve 44 are opened and closed in response to a change in the pressure inside the compression chamber 11a. Allow a constant force to act.

3 shows a first impact reduction device 51 for reducing the impact of the intake valve 43 according to the first embodiment.

As shown in FIG. 3, the first impact reduction device 51 is inserted into the suction hole 41 of the valve plate 40 and has a hollow cylindrical permanent magnet 61 having an N pole upper side and an S pole respectively. The suction valve 43 is made of a nonmagnetic metal.

The cylindrical permanent magnet 61 installed in the suction hole 41 generates a magnetic force line A as shown in FIG. 3.

When the piston 12 moves downward to lower the pressure of the compression chamber 11a, the suction valve 43 moves in the direction of opening the suction hole 41. At this time, a eddy current B is generated in the intake valve 43 in the clockwise direction by Lenz's Law. The magnetic force line (C) is induced by the eddy current (B), the induced magnetic force line (C) is the same direction as the magnetic force line (A) generated by the permanent magnet 61, the suction valve 43 is subjected to the attraction do. Since the attraction acts to hold the end of the suction valve 43, the vibration is reduced when the suction valve 43 opens the suction hole 41.

When the piston 12 moves upward to increase the pressure of the compression chamber 11a, the suction valve 43 moves in the direction of closing the suction hole 41 as shown in FIG. At this time, the eddy current D is generated in the intake valve 43 in the counterclockwise direction by the Lenz's Law. The magnetic force line (E) is induced by the eddy current (D), the induced magnetic force line (E) is the opposite direction of the magnetic force line (A) generated by the permanent magnet 61, the suction valve 43 is subjected to repulsive force do. Therefore, the speed at which the suction valve 43 moves in the direction of closing the suction hole 41 is reduced, so that the impact amount received by the suction valve 43 is reduced even when the suction valve 43 collides with the valve plate 40.

5 shows a first impact reduction device 51 for reducing the impact of the intake valve 43 according to the second embodiment.

As illustrated in FIG. 5, the first shock reduction device 51 includes a coil 62 inserted and wound in the suction hole 41 of the valve plate 40, and the suction valve 43 has an N pole at the lower side thereof. The upper side is made of a magnetic material forming the S pole.

The suction valve 43, which is a magnetic body, generates a magnetic force line (F). When the piston 12 moves downward to lower the pressure of the compression chamber 11a, the suction valve 43 moves in the direction of opening the suction hole 41. At this time, the current G is induced in the coil 62 in the direction of the arrow by Lenz's Law. The magnetic force line H is induced by the induced current G. Since the induced magnetic force line H is in the same direction as the magnetic force line F generated by the suction valve 43, the suction valve 43 receives the attraction force. . Therefore, vibration when the suction valve 43 opens the suction hole 41 is reduced.

FIG. 6 shows a first embodiment of a second impact reduction device 52 that reduces the impact of the discharge valve 44.

As shown in FIG. 6, the second impact reduction device 52 is inserted into the discharge hole 42 of the valve plate 40 and has a hollow cylindrical permanent magnet 63 whose upper side is an N pole lower side and an S pole. The discharge valve 44 is made of a nonmagnetic metal.

The cylindrical permanent magnet 63 installed in the discharge hole 42 generates a magnetic force line I as shown in FIG. 6.

When the piston 12 moves upward and the pressure of the compression chamber 11a becomes high, the discharge valve 44 moves in the direction of opening the discharge hole 42. At this time, a eddy current (J) is generated in the discharge valve 44 in the counterclockwise direction by the Lenz's Law. The magnetic force line (L) is induced by the eddy current (J), the induced magnetic force line (L) is the same direction as the magnetic force line (I) generated by the permanent magnet 63, the discharge valve 44 is subjected to the attraction do. Therefore, vibration when the discharge valve 44 opens the discharge hole 42 is reduced.

On the contrary, when the piston 12 moves downward and the pressure in the compression chamber 11a is lowered and the discharge valve 44 moves in the direction of closing the discharge hole 42, the eddy current J is generated clockwise and the magnetic force line (L) is also induced in the opposite direction. Accordingly, the discharge valve 44 is subjected to the repulsive force is prevented from colliding strongly with the valve plate 40.

6 shows an embodiment in which the cylindrical permanent magnet 63 is installed in the discharge hole 42, but as in the suction valve 43, the coil is wound around the discharge hole 42 and the discharge valve 44 is made of magnetic material. Figure 3 shows the same effect as above and description thereof will be omitted.

FIG. 7 shows a second embodiment of the second impact reduction device 52 which reduces the impact of the discharge valve 44.

As shown in FIG. 7, the second shock reduction device 52 has a cylindrical permanent magnet 64 formed on the cylinder head 13 at a lower side thereof and an N pole upper side thereof, and has a discharge valve 44. ) Is made of a nonmagnetic metal.

The cylindrical permanent magnet 64 installed in the cylinder head 13 generates a magnetic force line O as shown in FIG. 7.

When the piston 12 moves upward and the pressure of the compression chamber 11a becomes high, the discharge valve 44 moves in the direction of opening the discharge hole 42. At this time, a eddy current P is generated in the discharge valve 44 in the clockwise direction by Lenz's Law. The magnetic force line (Q) is induced by the eddy current (P), the induced magnetic force line (Q) is the opposite direction of the magnetic force line (O) generated by the permanent magnet 64, the suction valve 43 is subjected to the repulsive force do. Therefore, the vibration of the suction valve 43 is reduced because the force is received in the opposite direction in which the suction valve 43 is opened.

On the other hand, when the piston 12 moves downward to lower the pressure in the compression chamber 11a, the discharge valve 44 moves in the direction of closing the discharge hole 42. At this time, the discharge valve 44 The magnetic force line Q induced by the generated eddy current P and the eddy current P is formed in the opposite direction when the discharge valve 44 opens the discharge hole 42. Therefore, it is possible to prevent the discharge valve 44 from hitting the valve plate 40 strongly.

As described above in detail, according to the hermetic compressor according to the present invention, since the suction valve for regulating the suction hole and the discharge valve for regulating the discharge hole are subjected to a constant force in the opposite direction of opening, the vibration generated by the suction valve and the discharge valve is prevented. Has the advantage of reducing.

In addition, according to the hermetic compressor according to the present invention, the suction valve for regulating the suction hole and the discharge valve for regulating the discharge hole can be prevented from colliding strongly with the valve plate, thereby reducing noise and preventing the valve from being damaged. can do.

Claims (7)

A cylinder block formed with a compression chamber, A piston moving forward and backward in the compression chamber, A cylinder head coupled to one side of the cylinder block to seal the compression chamber; In a hermetic compressor having a valve plate provided between the cylinder block and the cylinder head and having a suction valve for intermitting the flow of refrigerant sucked into the compression chamber and a discharge valve for regulating the flow of refrigerant discharged from the compression chamber. And a shock reduction device for generating a force in a direction opposite to a direction in which the suction valve and the discharge valve move. The method of claim 1, The impact reduction device includes a first impact reduction device for generating a force in a direction opposite to the direction in which the suction valve is moved and a second impact reduction device for generating a force in a direction opposite to the direction in which the discharge valve is moved. Hermetic compressor. The method of claim 2, The first impact reduction device has a permanent magnet formed in the valve plate is inserted into the suction hole, which is a passage through which refrigerant is sucked into the compression chamber, and is installed, and the suction valve is a non-magnetic metal sealed compressor. . The method of claim 2, The first shock reduction device includes a coil formed in the valve plate and inserted into and installed in a suction hole, which is a passage through which refrigerant is sucked into the compression chamber, and the suction valve is a magnetic body. The method of claim 2, The second impact reducing device has a permanent magnet formed in the valve plate and inserted into and installed in a discharge hole, which is a passage through which refrigerant is discharged from the compression chamber, and the discharge valve is a nonmagnetic metal. compressor. The method of claim 2, The second shock reduction device includes a coil formed in the valve plate and inserted into and installed in a discharge hole that is a passage through which refrigerant is discharged into the compression chamber, and the discharge valve is a magnetic body. The method of claim 2, The second shock reduction device includes a permanent magnet installed in the cylinder head, the discharge valve is a hermetic compressor, characterized in that the non-magnetic metal.

Images