Pumps – Expansible chamber type – Having pulsation dampening fluid receiving space
Reexamination Certificate
2000-03-17
2001-08-28
Freay, Charles G. (Department: 3746)
Pumps
Expansible chamber type
Having pulsation dampening fluid receiving space
C417S312000
Reexamination Certificate
active
06280161
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air-tight type reciprocating compressor, and more particularly, to an air-tight type reciprocating compressor which can decrease discharge pulsation to reduce vibration on a discharge line as well as an overall value in a high-frequency band as a problem frequency.
2. Discussion of Related Art
Generally, a compressor is used to compress a refrigerant gas at a low temperature and low pressure state into gas at a high temperature and high pressure state. Particularly, the present invention is directed to an air-tight type compressor which is reciprocated by means of a piston.
The air-tight type reciprocating compressor is generally constructed in such a manner that a crankshaft is rotatably installed by means of a magnetic field formed on a stator and rotor within a body that maintains the air-tightness in the interior of the compressor and forms the external appearance thereof, and a piston which is reciprocated on a block, is connected to the one end of the crankshaft and discharges the pressurized refrigerant by the reciprocating movement thereof to a discharge pipe.
An example of conventional air-tight type reciprocating compressors is shown in FIG.
3
. In construction, a case member
20
, which has a discharge chamber where a discharging refrigerant is received, is coupled by means of a coupling means
30
such as a bolt to the one side of a pair of protrusions
11
formed on the lower part of a block
10
, and a discharge pipe
40
is connected to the case member
20
to discharge the refrigerant to a condenser (not shown).
In more detail, on the block
10
, there are provided a cylinder
12
along with a piston (not shown) is guided communicates with a tight surface
13
on which a valve plate (not shown) is installed and a discharge hole
14
which is adapted to discharge the pressurized refrigerant by the movement to the cylinder
12
to the discharge pipe
40
via the case member
20
coupled with the protrusions
11
by means of the coupling means
30
.
A reference numeral ‘
15
’ denotes a screw for securing each of the valve plate, a gasket (not shown) and a cylinder head (not shown) on the block
10
.
If the piston moves towards the tight surface
13
and reaches a top dead center, the compressed refrigerant gas pushes the discharge valve for blocking the discharge hole of the valve plate and is received in the discharge chamber of the cylinder head. Next, the compressed gas which has been received in the discharge chamber flows into the case member
20
via the discharge hole
14
of the block
10
and is concurrently supplied to the condenser via the discharge pipe
40
, a guide tube (not shown) and a discharge tube (not shown).
In the conventional air-tight type reciprocating compressor, however, there occurs a problem that as the discharge refrigerant gas flows along a single path formed on the block
10
, the pulsation of the discharge pressure becomes increase. Of course, this is not solved even though the shape or path of the discharge pipe
40
is changed.
In addition, there occurs a problem that the increment of the discharge pulsation causes recent refrigerator models using the compressor to rise noise and vibration values. This should be of course improved.
Due to the increment of the pulsation of the discharge refrigerant gas, the discharge gas is directly supplied via a connecting pipe of the compressor with a refrigerator to the refrigerator side, thus to vibrate a cabinet of the refrigerator. Of course, this increases the amount of the vibration and noise generated from the refrigerator.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to an air-tight type reciprocating compressor that substantially obviates one or more of the problems due to limitations and disadvantages of the related arts.
An object of the invention is to provide an air-tight type reciprocating compressor which has at least two discharge paths each having a predetermined size to thereby decrease the discharge pulsation, thereby allowing the vibration on the discharge line to be reduced and an overall value in a high-frequency band as a problem frequency to be lowered, such that it can reduce the noise and vibration caused due to the pressure pulsation upon refrigerant discharging.
To accomplish this and other objects of the present invention, there is provided an air-tight type reciprocating compressor having case members, each of which is coupled on the lower parts of a block, for receiving discharge refrigerant flowing through at least two discharge holes on the block, a connecting pipe which is adapted to communicate with the case members, and a discharge pipe which is connected to one of the case members, the compressor including: one of the at least two discharge holes having the larger diameter by at least 50-70% than that of the other installed on the case member to which the discharge pipe is connected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 2074932 (1937-03-01), Mittendorf et al.
patent: 5173034 (1992-12-01), Riffe
patent: 5435700 (1995-07-01), Park
patent: 6155067 (2000-12-01), Ono et al.
patent: 6176688 (2001-01-01), Collings et al.
Burns Doane Swecker & Mathis
Freay Charles G.
Samsung Kwangju Electronics Co., Ltd.
Torrente David J.
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