Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2002-03-04
2004-09-14
Lee, Kevin (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S527000
Reexamination Certificate
active
06789575
ABSTRACT:
The present application is based on and claims the benefit of Korean patent application Serial No. 2001-64550, filed Oct. 19, 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 high efficient valve assembly of a compressor, and more particularly, to a high efficient valve assembly of a compressor capable of reducing a refrigerant discharging load by lessening an operation time of a discharging valve and diminishing the pressure of the entire compressor.
2. Description of the Related Art
Generally, a compressor converts a mechanical energy to a compressed energy of a compressed fluid. The compressor draws in a refrigerant from a low-pressure evaporator for compressing the refrigerant in a freezer such as a refrigerator and compresses the refrigerant up to a condensation pressure. The compressor includes a reciprocal compressor, a rotate-type compressor, and a turbo-type compressor.
FIG. 1
is a view showing a conventional reciprocal hermetic compressor among various compressors. The reciprocal hermetic compressor generally comprises: an electric motor
20
including a stator
21
and a rotor
22
in a casing
10
; and a compressing unit
30
for drawing in the refrigerant by a rotation of a crank shaft
23
inserted in a center of the rotor
22
and discharging the refrigerant after compressing the refrigerant. The compressing unit
30
comprises: a cylinder
31
for containing the refrigerant; and a piston
32
for compressing the refrigerant by reciprocally moving in the cylinder
31
. A cylinder head
33
is disposed at a front side of the cylinder in order to seal the cylinder
31
. A valve assembly
40
is disposed between the cylinder head
33
and the cylinder
31
in order to allow the refrigerant to be supplied into the cylinder
31
or to be discharged from the cylinder
31
.
As shown in
FIG. 2
, the valve assembly
40
comprises: a valve plate
42
having a discharging valve
41
; a discharging valve
43
disposed between the valve plate
42
for opening and closing the discharging valve
41
and the cylinder head
33
, and a center of the discharging valve
43
is bent downwardly; a discharging tension valve
44
disposed above the discharging valve
43
, and a center of the discharging tension valve
44
is bent upwardly; a stop valve
45
disposed above the discharging tension valve
44
, and the stop valve
45
controls an opening degree of the discharging valve
43
and the discharging tension valve
44
; a stopper
46
disposed above the stop valve
45
, and the stopper
46
controls the stop valve
45
to be placed on a right position; and a keeper
47
for elastically pressing and supporting the stopper
46
.
An operation of the reciprocal hermetic compressor having the above structure is as follows. When the piston
32
retreats, the refrigerant of low temperature and low pressure flows from the evaporator of a freezer such as the refrigerator into a suction valve of the valve assembly
40
through a suction pipe and a suction muffler settled to be sealed at an upper casing or a lower casing. When the piston
32
advances, the refrigerant of high temperature and high pressure (the refrigerant has been compressed by the piston
32
in the cylinder
31
) flows from the discharging valve
43
of the valve assembly
40
to the outer evaporator through a discharging pipe connection tube settled to be sealed at a discharging pipe (not shown), the upper casing and the lower casing.
However, the valve assembly
40
of the conventional hermetic compressor having the above structure is bent to form a U-type with the discharging tension valve
44
to allow the discharging valve
43
to open and close the discharging valve
41
so that both ends of the valve assembly
40
can be supported. Moreover, the valve assembly
40
has a structure that the discharging valve
43
disposed at a lower part of the valve assembly
40
closes the discharging valve
41
by an elastic force of the both ends of the valves
43
,
44
. Therefore, an opening time of the discharging valve
43
at the time that the compressed gas is discharged is slowed down since the elastic force of the both ends of the valve
43
,
44
is relatively magnified. Accordingly, the conventional hermetic compressor has a problem of overloaded discharging of the refrigerant. The overloaded discharging of the refrigerant deteriorates the efficiency of the compressor as the refrigerant pressure of the entire compressor is increased.
To solve the above problem, some methods for settling the discharging valve at one end have been recently introduced. Yet, for these methods, the right positioning of the discharging valve is difficult when the valve assembly is assembled since the discharging valve is settled at only one end. In addition, although the discharging valve is accurately assembled, the assembled position is changed afterwards. Therefore, the efficiency of the compressor is deteriorated.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a high efficient valve assembly capable of not only minimizing the operation delay of a discharging valve and reducing the consumed power but also settling the discharging valve at a right position and supporting the discharging valve as only one end of the discharging valve is supported.
The above object is accomplished by providing a high efficient valve assembly of a compressor comprising: a valve plate having more than one discharging hole; a discharging valve for opening and closing the discharging hole, one end of the discharging valve is settled at the valve plate between the valve plate and a cylinder head; a stopper for controlling the discharging valve to be placed in position, both ends of the stopper are settled at the valve plate over the discharging valve; a fixing member for settling one end of the discharging valve and both ends of the stopper at the valve plate; and a first settlement unit formed at the discharging valve and the valve plate for positioning the discharging valve at the valve plate in position and supporting the discharging valve. Selectively, the valve assembly further comprises a second settlement unit formed at the discharging valve and the stopper for settling the stopper at the discharging valve in order to support the discharging valve and help the positioning of the stopper.
In the preferred embodiment of the present invention, the first settlement unit comprises: a protrusion formed at one end of the discharging valve settled at the valve plate; and a groove formed at a part of the valve plate corresponding to the protrusion in order to embrace the protrusion. In addition, the second settlement unit comprises: a support portion formed at the stopper to be protruded downwardly to a lower part of one end of the discharging valve; and an embracing hole formed at a part of the discharging valve corresponding to the support portion in order to embrace the support portion.
REFERENCES:
patent: 5178183 (1993-01-01), Kim
patent: 5577901 (1996-11-01), Yoon
patent: 5887622 (1999-03-01), Ahn
Lee Kevin
Samsung Gwangju Electronics Co. Ltd.
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