KR20070062802A - Hermetic type compressor - Google Patents

Abstract

A hermetic type compressor is provided to remove the dead volume between an entrance and an exit of an outlet hole for increasing the compressing efficiency of a refrigerant. A hermetic type compressor includes a valve device. The valve device includes an inlet valve(31) and an outlet valve(41). One end of the inlet valve is installed at inside of an inlet valve plate(30) to form a fixed end. One end of the outlet valve is installed at inside of an outlet valve plate(40) to be fixed. The inlet valve rotates toward a compressing chamber to open and to close an inlet hole(21) when a moving end(31a) covers an inlet hole. The outlet valve rotates toward inside of the valve plate to open and to close an outlet hole(22) when a moving end(41a) covers an outlet hole.

Description

Hermetic Compressor {HERMETIC TYPE COMPRESSOR}

1 is a cross-sectional view schematically showing the overall structure of a hermetic compressor according to an embodiment of the present invention.

Figure 2 is an exploded perspective view showing the valve unit side structure in a hermetic compressor according to an embodiment of the present invention.

3 is an exploded perspective view illustrating an enlarged structure of a valve plate, a discharge valve plate, and a suction valve plate constituting a valve device in a hermetic compressor according to an embodiment of the present invention.

4 is a perspective view of the valve plate of FIG. 3 viewed from the back side.

FIG. 5 is a plan view of the valve plate in a state in which the discharge valve plate and the suction valve plate of FIG. 3 are assembled.

FIG. 6 is a cross-sectional view of FIG. 5 to be unfolded along the cutting line AA, in which a represents an inlet valve and an outlet valve is closed, and b represents an inlet valve is closed and an outlet valve is open. It shows the state.

Explanation of symbols on the main parts of the drawings

20: valve plate 21: suction hole

22: discharge hole 23: receiving groove

23a: inner wall 30: suction valve plate

31: suction valve 32: discharge communication hole

40: discharge valve plate 41: discharge valve

42: suction communication hole

The present invention relates to a hermetic compressor, and more particularly, to a hermetic compressor having a valve device provided to control a flow of a refrigerant sucked into or discharged from the compression chamber.

In general, a compressor that is employed in a refrigerating cycle such as a refrigerator or an air conditioner to compress a refrigerant is provided with a driving unit providing a driving force for compressing the refrigerant in a sealed container forming an exterior, and receiving the driving force from the driving unit. A compression unit is provided that performs the compression action.

The dual compression unit is coupled to the cylinder to seal the compression chamber and the piston is provided to form a compression chamber in which the piston is connected to the rotary shaft and the connecting rod through the connecting rod for linear reciprocating movement, the piston is installed, and mutually A cylinder head having a refrigerant suction chamber and a refrigerant discharge chamber arranged to be partitioned, and a valve device interposed between the cylinder and the cylinder head to control a flow of refrigerant flowing from the refrigerant suction chamber to the compression chamber or discharged from the compression chamber to the refrigerant discharge chamber. Equipped.

The valve device includes a valve plate having a suction hole communicating between the compression chamber and the refrigerant suction chamber at one side and the other side of the central portion, and a discharge hole communicating the compression chamber and the refrigerant discharge chamber, respectively, and provided between the cylinder and the valve plate and rotating to the compression chamber side. A suction valve plate provided integrally with a suction valve for opening and closing a suction hole, a discharge valve provided to open and close the discharge hole on the outer surface of the cylinder head side valve plate, and a discharge valve outside the discharge valve so that the discharge valve does not hit the cylinder head. And a stopper for limiting the opening angle of the discharge valve and a retainer provided to receive the discharge valve and the stopper.

Here, the discharge valve, the stopper and the retainer are fastened to the valve plate through a screw, and the valve plate and the suction valve plate are fastened to couple the cylinder head to the cylinder in a state interposed between the cylinder and the cylinder head. It is fixed.

However, since the conventional hermetic compressor has a structure in which a stopper and a retainer are added to form a discharge valve, there is a problem in that the structure of the valve device is complicated, and after fixing the discharge valve, the stopper and the retainer to the valve plate, Again, there is a problem in that the assembly of the valve device is deteriorated due to the structure of fixing the valve plate and the suction valve plate to the cylinder together with the cylinder head.

In addition, the conventional hermetic compressor has a structure in which the discharge valve is installed in the valve plate opposite the suction valve and rotates toward the refrigerant discharge chamber to open and close the discharge hole, so that no actual compression occurs between the inlet and the outlet of the discharge hole. A dead volume is a factor that causes the compression efficiency of the refrigerant to decrease.

The present invention is to solve such a problem, it is an object of the present invention to provide a hermetic compressor provided to simplify the structure of the valve device and improve the assembly of the valve device.

Another object of the present invention is to provide a hermetic compressor provided to reduce a dead volume in which actual compression does not occur.

A hermetic compressor according to the present invention for achieving this object is provided between a cylinder forming a compression chamber and a cylinder head provided to partition the refrigerant suction chamber and the refrigerant discharge chamber from each other, or are sucked into the compression chamber from the refrigerant suction chamber or from the compression chamber. And a valve device for regulating the flow of the refrigerant discharged into the refrigerant discharge chamber, wherein the valve device includes a suction hole for communicating between the refrigerant suction chamber and the compression chamber, and a discharge hole for communicating between the compression chamber and the refrigerant discharge chamber. A suction valve plate provided between the cylinder and the valve plate and integrally provided with a valve plate and a suction valve that rotates toward the compression chamber and opens and closes the suction hole, and rotates inside the valve plate to be opposite to the suction valve. Integrally provided with a discharge valve for opening and closing the discharge hole It characterized in that it comprises a discharge valve plate provided between the intake valve plate and the valve plate.

In addition, the discharge valve side has a receiving groove formed in the valve plate so that the discharge valve can be rotated to the inside of the discharge valve opening operation, the discharge hole is one side wall of the receiving groove and the refrigerant discharge chamber side Characterized in that the communication between the outer surface of the valve plate.

In addition, the suction valve plate is formed with a discharge communication hole for communicating the interior of the compression chamber and the receiving groove, the discharge valve plate is formed with a suction communication hole for communicating the compression chamber and the refrigerant suction chamber, the discharge valve is It is provided to block the discharge communication hole during the closing operation, the intake valve is characterized in that it is provided to block the suction communication hole during the closing operation.

In addition, the inner wall of the receiving groove in the rotational direction of the discharge valve is provided to support the discharge valve when the discharge hole is opened, the width between the discharge valve and the inner wall in the longitudinal direction of the receiving groove is the discharge valve It characterized in that it is provided to be inclined to increase toward the free end side.

In addition, the cylinder head and the cylinder further comprises a coupling means for coupling each other, the valve plate, the discharge valve plate and the suction valve plate is characterized in that coupled between the cylinder and the cylinder head through the coupling means. .

Hereinafter, exemplary embodiments 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 the present embodiment forms its appearance through the hermetic container 1 having the refrigerant suction tube 1a and the refrigerant discharge tube 1b installed at one side and the other side, respectively.

Inside the hermetic container 1, a compression unit 2 for compressing a refrigerant and a driving unit 3 for providing a driving force for compressing the refrigerant are provided. Such a compression unit 2 and a driving unit ( 3) is installed through the frame 4.

First, the drive unit 3 is a stator 3a provided to be fixed to the upper outer side of the frame 4 and a rotor installed inside the stator 3a to rotate through electrical interaction with the stator 3a ( 3b), and the upper side has a rotary shaft 3c rotatably supported by the journal bearing 5 installed on the center side of the rotor 3b and the lower side is rotatable. The lower end of the rotating shaft 3c extending downward forms an eccentric portion 3c-1 that rotates eccentrically.

And the compression unit (2) and the piston 12 is provided to be connected to the eccentric portion (3c-1) of the rotary shaft (3c) through a connecting rod 11 to linearly reciprocate the movement of the rotary shaft (3c), A cylinder 13 integrally provided with the frame 4 on one side of the lower frame 4 so as to form a compression chamber 13a in which the piston 12 is installed, and a cylinder to seal the compression chamber 13a. (13) A cylinder head 14 having a refrigerant suction chamber 14a and a refrigerant discharge chamber 14b coupled to one end and provided to be partitioned with each other, and interposed between the cylinder 13 and the cylinder head 14 for refrigerant suction. And a valve device 15 provided to interrupt the flow of the refrigerant sucked into the compression chamber 13a from the chamber 14a or discharged from the compression chamber 13a to the refrigerant discharge chamber 14b.

Through this structure, when the rotating shaft 3c is rotated together with the rotor 3b by the electrical interaction between the stator 3a and the rotor 3b of the driving unit 3, the rotating shaft is connected via the connecting rod 11. The piston 12 connected to the eccentric portion 3c-1 of (3c) performs a linear reciprocating motion inside the compression chamber 13a, and thus is sealed by the pressure difference generated inside and outside the compression chamber 13a. The refrigerant sucked into the compression chamber 13a from the outside of the container 1 through the refrigerant suction pipe 1a and the refrigerant suction chamber 14a is compressed in the compression chamber 13a, and the refrigerant compressed in the compression chamber 13a is The refrigerant is discharged to the outside of the sealed container 1 through the refrigerant discharge chamber 14b and the refrigerant discharge pipe 1b, and this operation is repeatedly performed, and the compression operation of the refrigerant by the compressor is performed.

On the other hand, in the present embodiment, the valve device 15 is a suction hole for communicating between the compression chamber (13a) and the refrigerant suction chamber (14a) on one side and the other side, respectively, as shown in Figs. (21) and the valve plate 20 provided in a rather thick plate shape so as to have a discharge hole 22 communicating between the compression chamber 13a and the refrigerant discharge chamber 14b, and opening and closing the suction hole 21. Inlet valve 31 is integrally provided with a thin sheet-shaped suction valve plate 30 provided between the cylinder 13 and the valve plate 20 and the discharge valve provided to open and close the discharge hole 22 ( 41) integrally provided with a thin sheet-shaped discharge valve plate 40 provided between the suction valve plate 30 and the valve plate 20, and to prevent the leakage of the refrigerant, and the suction valve plate 30 and The first gasket 50 and the valve valve provided between the cylinder 13 Site is configured to include a second gasket 60 is provided between the 20 and the cylinder head 14.

In addition, the cylinder head 14 and the cylinder 13 are mutually fixed through a coupling means such as a fixing bolt 70, each of the components of the valve device 15 through the fixing bolt 70 cylinder head ( It is fixed in the state interposed between the 14) and the cylinder (13). To this end, the bolt fastening holes 14c, 20a, 30a, 40a, 50a, and 60a are formed to pass through the fixing bolts 70 through the respective components constituting the valve device 15 and the corner side of the cylinder head 14. Each corner side of the cylinder 13 is formed with a bolt fastening groove 13b in which female threads are processed.

In the valve device 15, the suction valve 31 and the discharge valve 41 have edges except for one end which will form a fixed end inside the suction valve plate 30 and the discharge valve plate 40, respectively. It is provided to have a flap form by cutting the inlet, the suction valve 31 is rotated toward the compression chamber (13a) while the free end (31a) side is provided to cover the suction hole 21, the suction hole 21 The discharge valve 41 is rotated to the inside of the valve plate 20 to be opposite to the suction valve in a state where the discharge valve 41 is provided to cover the discharge hole 22 on the free end 41a side. Will be opened and closed.

Therefore, the discharge valve plate 40 which opens and closes the discharge hole 22 through the discharge valve 41 integrally formed in a state located between the suction valve plate 30 and the valve plate 20 is a discharge valve ( There is no fear that 41 will hit the cylinder head 14 so that a separate stopper or retainer can be removed to simplify the structure of the valve device 15. In addition, the discharge valve 41 is formed integrally with the cylinder 13 and the fixing bolt 70 through which the cylinder head 14 and the cylinder 13 are fixed to each other together with the configuration of the other valve device 15. The discharge valve plate 40 fixed between the cylinder heads 14 allows the work of fixing the discharge valve to the valve plate through a separate screw so that the assembly of the valve device 15 is also improved.

The discharge valve 41 during the rotation operation of the discharge valve 41 for opening the discharge hole 22 on the outer surface of the valve plate 20 side of the discharge valve plate 40 at a portion corresponding to the position of the discharge valve 41. ) Is provided with an accommodating groove 23 provided to rotate inside the valve plate 20, and the discharge hole 22 is a side wall of the accommodating groove 23 on the free end 41a side of the discharge valve 41. And the outer surface of the valve plate 20 on the refrigerant discharge chamber 14b side are provided.

This allows the discharge hole 22 to be opened and closed while rotating to the inside of the valve plate 20 even when the discharge valve 41 is positioned between the suction valve plate 30 and the valve plate 20. It is to improve the compression efficiency of the refrigerant by reducing the dead volume (dead volume) by preventing the dead volume (dead volume) does not form between the inlet and the outlet of the).

In addition, the suction valve plate 30 at the position corresponding to the free end 41a side of the discharge valve 41 communicates the compression chamber 13a with the inside of the receiving groove 23 during the opening operation of the discharge valve 41. The discharge communication hole 32 is formed, and the discharge valve plate 40 at the position corresponding to the free end 31a side of the suction valve 31 is provided with the compression chamber 13a and the refrigerant during the opening operation of the suction valve 31. A suction communication hole 42 for communicating the discharge chamber 14b is formed, and the discharge valve 41 blocks the discharge communication hole 32 during the closing operation, and the suction valve 31 during the closing operation. It is provided to block the suction communication hole (42).

In addition, the inner wall 23a of the accommodation groove 23 on the rotational side of the discharge valve 41 supports the discharge valve 41 rotated into the accommodation groove 23 during the opening operation of the discharge valve 41. The inner wall 23a has a width between the discharge valve 41 and the inner wall 23a in the longitudinal direction of the receiving groove 23 toward the free end 41a of the discharge valve 41. It is inclined so as to become large so as to limit the opening angle of the discharge valve 41 so that the discharge valve 41 can be opened in a proper state without a separate member.

Next, in the hermetic compressor according to the present embodiment configured as described above, the assembling process of the valve device 15 and the intermittent operation of the refrigerant flow by the valve device 15 will be described.

First, each component of the valve device 15 is disposed between the cylinder 13 and the cylinder head 14. The first gasket 50, the suction valve plate 30, the discharge valve plate 40, the valve plate 20, and the second gasket 60 are formed. When the fixing bolt 70 passes through each of the bolt fastening holes 14c, 60a, 20a, 40a, 30a, and 50a in order in order to be fastened to the bolt fastening groove 13b, the cylinder head At the same time as the 14 and the cylinder 13 are coupled to each other, each component of the valve device 15 is assembled so as to be fixed between the cylinder head 14 and the cylinder 13.

At this time, since the discharge valve 41 formed integrally with the discharge valve plate 40 does not need to be fixed to the discharge valve plate 40 through a separate fastening means, the assembling operation of the valve device 15 is made easier. do. In addition, the discharge valve 41 does not hit the cylinder head 14 during the rotation operation for opening the discharge hole 22 even when a separate stopper or retainer is deleted, thereby simplifying the structure of the valve device 15. Make sure

6 shows an intermittent operation of the refrigerant by the assembled valve device 15.

For reference, FIG. 5 is a plan view of the valve plate 20 in a state in which the discharge valve plate 40 and the suction valve plate 30 are assembled, and FIG. 6 is unfolded in a state of FIG. 5 taken along the line AA. 6 shows a state in which the intake valve 31 is open and the discharge valve 41 is closed, and b is the intake valve 31 is closed and the discharge valve 41 is It is an open state.

As shown in FIG. 6, when the piston 12 moves backward and the compression chamber 13a becomes low, the suction valve 31 is compressed while the refrigerant in the refrigerant suction chamber 14a is sucked into the compression chamber 13a. It is rotated to the seal 13a side to open the suction hole 21. At this time, the discharge valve 41 blocks the discharge communication hole 32 of the suction valve plate 30 to prevent the refrigerant in the refrigerant discharge chamber 14b from flowing into the compression chamber 13a.

On the contrary, when the piston 12 moves forward and the compression chamber 13a becomes high pressure, the discharge valve 41 is rotated into the receiving groove 23 by being pushed by the refrigerant compressed in the compression chamber 13a. When the valve 41 is supported by the inner wall 23a, the discharge communication hole 32 and the discharge hole 22 communicate with each other, and the refrigerant compressed in the compression chamber 13a receives the accommodating groove 23 and the discharge hole ( 22 is discharged to the refrigerant discharge chamber 14b. At this time, the suction valve 31 blocks the suction communication hole 42 of the discharge valve plate 40 so that the refrigerant of the compression chamber 13a side is not discharged to the refrigerant suction chamber 14b side.

When the refrigerant is compressed, the discharge valve 41 rotates to the inside of the receiving groove 23 in a state located between the suction valve plate 30 and the valve plate 20 to open and close the discharge hole 22. The dead volume is reduced between the inlet and the outlet of the discharge hole 22 so as not to form a dead volume in which actual compression does not occur, thereby improving the compression efficiency of the refrigerant.

As described above in detail, the hermetic compressor according to the present invention has a discharge valve formed integrally with the discharge valve plate interposed between the suction valve plate and the valve plate while the discharge valve is rotated inside the receiving groove formed in the valve plate to discharge the valve plate. It is provided to have a structure for opening and closing the ball, the discharge valve plate is fixed in the state interposed between the cylinder and the cylinder head with the configuration of the other valve device through the coupling means for fixing the cylinder head and the cylinder mutually fixed.

Therefore, in the hermetic compressor according to the present invention, since the discharge valve does not need to be fixed to the discharge valve plate through a separate fastening means, the assembling work of the valve device is easier, and a separate stopper or retainer is removed. Also, the discharge valve does not hit the cylinder head during the rotation operation of the discharge valve for opening the discharge hole, thereby simplifying the structure of the valve device.

In addition, the hermetic compressor according to the present invention opens and closes the discharge hole while rotating into the receiving groove formed in the valve plate while the discharge valve is positioned between the suction valve plate and the valve plate, thereby effectively compressing the inlet and the outlet of the discharge hole. This does not form a dead volume (dead volume) that does not occur, thereby reducing the dead volume (dead volume), thereby improving the compression efficiency of the refrigerant.

Claims (5)

A valve device interposed between a cylinder forming a compression chamber and a cylinder head provided to partition the refrigerant suction chamber and the refrigerant discharge chamber from each other to control the flow of the refrigerant sucked into the compression chamber from the refrigerant suction chamber or discharged from the compression chamber to the refrigerant discharge chamber. In the hermetic compressor having: The valve device includes a valve plate having a suction hole communicating between the refrigerant suction chamber and the compression chamber and a discharge hole communicating between the compression chamber and the refrigerant discharge chamber, and a suction plate rotating to the compression chamber and opening and closing the suction hole. The suction valve plate is integrally provided with an intake valve plate provided between the cylinder and the valve plate, and a discharge valve that rotates inside the valve plate and opens and closes the discharge hole opposite to the intake valve. And a discharge valve plate provided between the valve plate and the valve plate. The method of claim 1, The discharge valve side has a receiving groove formed in the valve plate to allow the discharge valve to rotate to the inside when the discharge valve is opened, the discharge hole is formed on one side wall of the receiving groove and the refrigerant discharge chamber side. Hermetic compressor, characterized in that the communication between the outer surface of the valve plate. The method of claim 2, A discharge communication hole for communicating the compression chamber and the inside of the receiving groove is formed in the suction valve plate, and a suction communication hole for communicating the compression chamber and the refrigerant suction chamber is formed in the discharge valve plate. The discharge valve is provided to block the discharge communication hole in the closing operation, the intake valve is characterized in that the closed compressor is provided to block the suction communication hole in the closing operation. The method of claim 2, The inner wall of the receiving groove in the rotational direction of the discharge valve is provided to support the discharge valve when the discharge hole is opened, and a width between the discharge valve and the inner wall in the longitudinal direction of the receiving groove is wider than that of the discharge valve. Hermetic compressor, characterized in that provided inclined so as to increase toward the free end. The method of claim 1, Further comprising coupling means for allowing the cylinder head and the cylinder to be coupled to each other, And the valve plate, the discharge valve plate, and the suction valve plate are coupled together between the cylinder and the cylinder head through the coupling means.

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