Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2002-03-04
2004-08-10
Lee, Kevin (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
Reexamination Certificate
active
06772792
ABSTRACT:
The present application is based on and claims the benefit of Korean patent application Serial Nos. 2001-38185, filed Jun. 29, 2001, the contents of which are hereby incorporated by reference in their entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a compressor valve assembly, and more particularly to a valve assembly capable of reducing abnormal noise when refrigerant is discharged.
2. Description of the Related Art
Generally, a compressor is widely used for compressing refrigerant in a freezing apparatus such as a refrigerator.
As shown in
FIG. 1
, a conventional reciprocal compressor comprises a driving unit
20
including a stator
21
and a rotator
22
in a body case
10
, and a compressing unit
30
for discharging refrigerant after drawing the refrigerant in accordance with rotation of a crank shaft
23
inserted by compressing at center of the rotator
22
.
The compressing unit
30
includes a cylinder
31
, and a piston
32
for compressing refrigerant by reciprocating inside of the cylinder
31
. A cylinder head
33
for sealing the cylinder
31
is disposed at a front of the cylinder
31
. On the other hand, a valve assembly
40
, for supplying the refrigerant in the cylinder
31
or discharging the refrigerant from the cylinder
31
, is inserted between the cylinder head
33
and the cylinder
31
.
As shown in
FIG. 2
, the valve assembly
40
comprises a valve plate
42
in which a refrigerant discharging hole
41
is formed, a discharging valve
43
, formed between the valve plate
42
and the cylinder head
33
, for opening and closing the refrigerant discharging hole
41
, and a keeper
44
, formed at an upper part of the discharging valve
43
, for controlling opening range.
The discharging valve
43
comprises a settled end
43
a
, which is settled at the valve plate
42
, and a free end
43
b
for vibrating up and down by a compressing force of the piston
32
, and the free end
43
b
is formed at an upper part of the refrigerant discharging hole
41
.
The keeper
44
includes a settled end
44
a
connected with the settled end
43
a
of the discharging valve
43
, and an open end
44
b
formed at a corresponding place of the free end
43
b
of the discharging valve
43
. The keeper
44
to be formed that an opened end
44
b
is bent upwardly from a settled end
44
a
for the discharging valve
43
to have a lift L of a predetermined height.
According to a conventional valve assembly
40
with the above construction, the keeper
44
should be exactly bent for the discharging valve
43
to have appropriate lift L. However, it is very difficult to bend exactly as it is wanted because of a feature of the bending processing. If the keeper
44
is processed that the lift L is greater than an appropriate volume, noise is generated since the discharging valve
43
is opened too much and the discharging valve
43
collides with the keeper
44
when the refrigerant is discharged.
In addition, according to the conventional valve assembly
40
, if a lower side of the settled end
44
a
of the keeper
44
is not flat, the discharging valve
43
and the keeper
44
can not be adhered to each other at a connecting place. If the discharging valve
43
and the keeper
44
are not adhered at the connecting place, the lift L of the discharging valve
43
cannot be maintained evenly, and thus the discharging valve
43
cannot operate with stability. Therefore, if the discharging valve
43
is collided with the keeper
44
, or the free end
43
b
of the discharging valve
43
is vibrated due to remained vibration, when the refrigerant is discharged, abnormal noise is generated.
SUMMARY OF THE INVENTION
The present invention has been made to overcome the above-mentioned problems of the related art. Accordingly, it is an object of the present invention to provide a compressor valve assembly capable of reducing abnormal noise generated while refrigerant is being discharged because lift of a discharging valve is maintained evenly and the discharging valve is firmly settled at the valve plate.
The above object of the present invention is accomplished by providing a valve assembly including a valve plate having a refrigerant discharging hole, a discharging valve having one end that is settled at the valve plate for opening and closing the refrigerant discharging hole, a keeper, placed at an upper part of the discharging valve, having one end that is connected with the valve plate with the discharging valve for limiting lift of the discharging valve, and a bead protruded for a predetermined width and height at a lower side of the keeper.
Here, the bead is spaced for a predetermined length from a center of a connection member connecting the each settled end of the discharging valve and the keeper with the valve plate in direction of the refrigerant discharging hole.
When the height of the bead is 0.1 to 0.5 mm, the lift of the discharging valve is 0.36 to 0.66 mm, and preferably, when the height of the bead is 0.23 mm, the lift of the discharging valve is 0.56 mm. Moreover, the width of the bead is 0.5 to 2.0 mm, and preferably, the width of the bead is 1.5 mm.
According to the present invention, since the bead presses an upper side of the discharging valve, the lift of the discharging valve is maintained evenly, and the settled end of the discharging valve is firmly settled at the valve plate. Therefore, abnormal noise generated while refrigerant is being discharged can be reduced due to stable operation of the discharging valve.
REFERENCES:
patent: 4628963 (1986-12-01), Ishijima et al.
patent: 5379799 (1995-01-01), Kawai et al.
Lee Kevin
Samsung Gwangju Electronics Co. Ltd.
Westman Champlin & Kelly P.A.
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