KR200303283Y1 - Valve plate for hermetic compressor - Google Patents

Abstract

The valve plate of the hermetic reciprocating compressor according to the present invention has a refrigerant suction hole which is opened and closed by an intake lead valve and a refrigerant discharge hole which is opened and closed by a discharge lead valve and is disposed between the cylinder block and the cylinder head of the hermetic reciprocating compressor. The valve seat of the refrigerant suction hole and the discharge hole is characterized in that the inclined surface portion of a predetermined angle for the surface contact of the valve repeatedly contacted with the valve seat. According to this, since the inclined surface portion formed in the valve seat and the corresponding valve contact with a certain area, the wear degree can be reduced as compared with the conventional line contact. Therefore, it is possible to extend the life of the valve plate and the valve, and to prevent the leakage of airtight that may occur due to the wear of the valve.

Description

VALVE PLATE FOR HERMETIC COMPRESSOR}

The present invention relates to a valve plate constituting the valve device of the hermetic reciprocating compressor.

In the general hermetic reciprocating compressor, as shown in FIG. 1, a piston 4 connected to a eccentric portion 2a by a connecting rod 3 to a crankshaft 2 is rotated by a motor 1, and a cylinder 5. By reciprocating the inside with a predetermined stroke, a repetitive operation in which the refrigerant is sucked, compressed and discharged is performed. At this time, the suction and discharge of the refrigerant are controlled by the valve device 7 formed between the cylinder 5 and the cylinder head 6.

As shown in FIG. 2, the valve device 7 includes a valve plate 10, a suction lead valve 20, and a discharge lead valve 30.

The valve plate 10 has a coolant suction hole 11 and a coolant discharge hole 12, and is disposed between the cylinder 5 and the cylinder head 6 via an packing 40 or the like. The suction lead valve 20 is installed at the cylinder 5 side of the valve plate 10, one end of which is opened and closed to open and close the refrigerant suction hole 11 by the pressure inside the cylinder 5. 10) is fixed and installed. The discharge lead valve 12 may be configured to open and close the refrigerant discharge hole 12 by a pressure difference inside / outside the cylinder 5 at the cylinder head 6 side of the valve plate 10. 10) is installed.

Meanwhile, around the refrigerant suction hole 11 and the discharge hole 12, a valve seat 11 a as shown in FIG. 3, in which the corresponding valve 20 or 30 is in close contact, is formed. Although only the valve seat 11a around the suction hole 11 is shown in the figure, such a valve seat is formed also around the discharge hole 12.

In the hermetic reciprocating compressor configured as described above, the suction and discharge lead valves 20 and 30 are the refrigerant suction hole 11 and the discharge hole 12 while swinging by the pressure difference inside / outside the cylinder 5. ) Will be opened and closed repeatedly.

Referring to the above-described valve operation by taking the intake lead valve 20 as an example, the intake lead valve 20 is formed by the pressure of the valve plate 10 by the pressure as the pressure inside the cylinder 5 approaches the discharge pressure. It is in close contact with the refrigerant suction hole 11 so as to close it. At this time, since the suction lead valve 20 is thin, it is supported by the valve seat 11a of the refrigerant suction hole 11, as shown in FIG. It is in close contact with the valve plate 10 while being elastically deformed. In this case, the discharge lead valve 30 opens the refrigerant discharge hole 12, and the compressed refrigerant is discharged through the discharge hole 12, whereby the suction in the cylinder 5 is lowered. As the reed valve 20 opens the refrigerant suction hole 11, suction of the refrigerant is performed.

The suction lead valve 20 repeats the swinging movement of opening and closing the refrigerant suction hole 11 during the operation of the compressor. In this process, the surroundings of the refrigerant suction hole 11 of the valve seat 11a are sharpened. When the suction lead valve 20 is in contact with each other, the line contact is made, and thus, both members repeatedly contacted with each other, in particular, the contact portion of the suction lead valve 20 is badly worn. This wear not only leads to shortening of the valve life, but also to leak leakage, which reduces the reliability of the compressor.

The present invention has been made in view of the above, and an object thereof is to provide a valve plate of a hermetic reciprocating compressor whose structure is improved to prevent abrasion of the suction and discharge lead valves.

1 is a cross-sectional view schematically showing a general hermetic reciprocating compressor,

Figure 2 is a cross-sectional view showing an extractor valve apparatus to which a conventional valve plate is applied,

Figure 3 is an enlarged cross-sectional view showing the structure of the conventional valve plate and the suction lead valve is in line contact around the suction hole of the valve plate,

Figure 4 is a cross-sectional view corresponding to Figure 2 showing an extract of the valve valve compressor applied according to an embodiment of the present invention, and

Figure 5 is an enlarged cross-sectional view showing the structure of the valve plate according to the present invention and the suction lead valve surface contact around the suction hole of the valve plate.

<Description of Symbols for Main Parts of Drawings>

5; cylinder 6; cylinder head

10; valve plate 11; refrigerant suction hole

11a; valve seat 11b; inclined surface portion

20; suction lead valve 30; discharge lead valve

The valve plate of the hermetic reciprocating compressor according to the present invention for achieving the above object is provided with a cylinder block having a refrigerant suction hole opened and closed by the suction lead valve of the compressor valve device and a refrigerant discharge hole opened and closed by the discharge lead valve. It is disposed between the cylinder head, the valve seat of the refrigerant suction hole and the discharge hole is a valve of the hermetic reciprocating compressor, characterized in that the inclined surface portion of a predetermined angle for the surface contact of the valve repeatedly in contact with the valve seat is formed. plate.

According to this, since the inclined surface portion formed in the valve seat and the corresponding valve contact with a certain area, the wear degree can be reduced as compared with the conventional line contact. Therefore, it is possible to extend the life of the valve plate and the valve, and to prevent the leakage of airtight that may occur due to the wear of the valve.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view showing an extractor valve apparatus to which a valve plate is applied according to an embodiment of the present invention, and FIG. 5 is a structure of a valve plate according to the present invention and a suction lead valve around a suction hole of the valve plate. An enlarged cross-sectional view showing surface contact. For reference, in describing the embodiments of the present invention, the same reference numerals refer to the same parts as those in the prior art.

4 and 5, the valve plate 10 according to the present invention is disposed between the cylinder 5 and the cylinder head 6, the suction lead valve 20 and the discharge lead valve 30 and the like. Together, it constitutes a valve device of the compressor.

The valve plate 10 has a refrigerant suction hole 11 opened and closed by the suction lead valve 20 and a refrigerant discharge hole 12 opened and closed by the discharge lead valve 30.

In addition, the valve seat 11a (valve seat around the refrigerant discharge hole is not shown) for allowing the corresponding reed valve 20 or 30 to be in close contact with the refrigerant suction hole 11 and the discharge hole 12. Are each provided. This valve seat 11a is provided with the inclined surface part 11b inclined by the predetermined angle in accordance with the characteristics of this invention.

The inclined surface portion 11b is formed by chamfering the end of the refrigerant suction hole 11, whereby the suction lead valve 20 contacts the valve seat 11a with its swing as shown in FIG. When in contact with the surface, it has a constant area.

Therefore, compared with the conventional two members in line contact with each other, the wear can be significantly reduced, it is possible to minimize the wear of the valve.

On the other hand, since the other configuration and operation of the valve device employing the valve plate 10 as described above is the same as the conventional case described above, detailed description thereof will be omitted here.

According to the present invention as described above, since a predetermined inclined surface portion is formed around the intake and discharge holes of the valve plate, that is, the valve seat, the intake lead valve and the discharge lead valve repeatedly contacted with the valve seat are the inclined surface. It is in surface contact with the valve seat having a portion. Therefore, it is possible to reduce the wear phenomenon between the members caused by the conventional line contact, thereby extending the life of the suction and discharge lead valve, and to prevent the leakage of airtightness that may be caused by the wear of the valve. The reliability can be further improved.

In the above, the present invention has been shown and described in connection with a preferred embodiment for illustrating the principles of the present invention, the present invention is limited to the configuration and operation as shown and described as such. That is, one of ordinary skill in the art to which the present invention belongs will appreciate that many changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims. . Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

Claims (1)

In the valve plate of the hermetic reciprocating compressor provided between the cylinder block and the cylinder head having a refrigerant suction hole opened and closed by the suction lead valve constituting the compressor valve device and the refrigerant discharge hole opened and closed by the discharge lead valve, The valve plate of the refrigerant suction hole and the discharge hole is a valve plate of the hermetic reciprocating compressor, characterized in that the inclined surface portion of a predetermined angle for the surface contact of the valve repeatedly contacted with the valve seat.