Pumps – Expansible chamber type – Plural pumping members in single pump chamber
Reexamination Certificate
2002-09-12
2004-10-12
Yu, Justine R. (Department: 3746)
Pumps
Expansible chamber type
Plural pumping members in single pump chamber
C417S415000, C417S416000, C184S006800, C184S013100
Reexamination Certificate
active
06802700
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an oil supplying apparatus for an opposed type reciprocating compressor, and particularly, to an oil supplying apparatus for an type opposed reciprocating compressor which is able to supply the oil smoothly when a compressor is installed in lying or in standing type.
2. Description of the Background Art
Generally, an opposed type reciprocating compressor is a compressor of high efficiency and low vibration in which two compression units coupled respective reciprocating motors are disposed to face each other in one casing.
As shown in
FIG. 1
, the conventional opposed type reciprocating compressor comprises a casing
10
including a plurality of suction pipes (SP
1
and SP
2
) and a discharge pipe (DP), a first reciprocating motor
21
and a second reciprocating motor
22
mounted on inner both sides of the casing
10
, a cylinder
30
disposed between the reciprocating motors
21
and
22
, a first piston
41
and a second piston
42
inserted into the cylinder
30
to be slided and coupled to armatures
21
C and
22
C of the reciprocating motors
21
and
22
to form a compression space S, a first suction valve
51
and a second suction valve
52
mounted on a front end surfaces of the pistons
41
and
42
, a discharge valve
60
mounted on the compression space S between the pistons
41
and
42
so as to be opened/closed, and a first spring assembly
71
and a second spring assembly
72
for supporting the armatures
21
C and
22
C of the reciprocating motors
21
and
22
and for supporting the respective pistons
41
and
42
in order to induce resonating movements.
The reciprocating motors
21
and
22
respectively comprise outer stators
21
A and
22
A and inner stators
21
B and
22
B formed as cylindrical shapes and fixed on the casing
10
, and armatures
21
C and
22
C disposed between the outer stators
21
A and
22
A and the inner stators
21
B and
22
B for performing linear reciprocating movements.
The cylinder
30
is formed as a cylinder including a through hole
31
in a direction of reciprocating movement of the pistons
41
and
42
so that the pistons
41
and
42
are inserted as sliding therethrough to form the compression space S, and an outer circumferential surface of the cylinder
30
is adhered to an intermediate part of an inner circumferential surface of the casing
10
and fixed.
Also, on center part of the through hole
31
on the cylinder
30
, a discharge hole
32
which is communicated with the compression space S to penetrate in radial direction of the cylinder
30
is formed.
The first piston
41
and the second piston
42
are respectively coupled to the armatures
21
C and
22
C of the first and second reciprocating motors
21
and
22
, and suction flow paths
41
a
and
42
a
are penetratingly formed on hollow portions of the respective pistons
41
and
42
in the direction of reciprocating movement.
The first and second suction valves
51
and
52
are mounted on a front end surface of the respective pistons
41
and
42
so as to open/close the front ends of the suction flow paths
41
a
and
42
a
formed on the hollow portions of the respective pistons
41
and
42
.
The discharge valve
60
is received inside the discharge hole
32
of the cylinder
30
so as to open/close the discharge hole
32
.
The first and second spring assemblies
71
and
72
respectively comprise a first spring supporting plate
71
A and a second spring supporting plate
72
A coupled to the armatures
21
C and
22
C of the respective reciprocating motors
21
and
22
and to the pistons
41
and
42
, and a plurality of resonating springs
71
B and
72
B for supporting both side surfaces of the respective spring supporting plates
71
A and
72
A.
Hereinafter, operations of the conventional reciprocating compressor will be described.
When an electric source is applied to the reciprocating motors
21
and
22
which are located on both inner side surfaces of the casing
10
, the respective pistons
41
and
42
perform reciprocating movements toward opposite directions of each other inside the cylinder
30
, and at the same time, refrigerant gas is sucked into the casing
10
through the suction pipes SP
1
and SP
2
. After that, the refrigerant gas is induced into the compression space S of the cylinder
30
and compressed by the continuous reciprocating movements of the pistons
41
and
42
, and discharged to the outer system of the casing
10
through the discharge pipe DP. And the above processes are repeated.
However, in the conventional opposed type reciprocating compressor, the refrigerant gas which is induced into the casing
10
through the suction pipes SP
1
and SP
2
is mixed with the oil filled in the casing
10
, and induced into the compression space S to supply the oil as sliding into the cylinder
30
and to a sliding portion between the pistons
41
and
42
. However, the mixture of the sucked gas and the oil is not made smoothly and the amount of supplied oil is not sufficient. Even if the oil is supplied, the speed of supplying oil is reduced, and therefore, a dry abrasion between the cylinder
30
and the pistons
41
and
42
may be caused due to lack of oil during operation of compressor.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide an oil supplying apparatus for an opposed type reciprocating compressor which is able to supply oil between a cylinder and a piston smoothly.
To achieve the object of the present invention, as embodied and broadly described herein, there is provided an oil supplying apparatus for an opposed type reciprocating compressor comprising: a casing having a suction pipe and a discharge pipe on both sides thereof to be communicated and having a predetermined amount of oil filled therein; a plurality of reciprocating motors installed on inner both sides of the casing to perform reciprocating movements toward opposite directions of each other; a cylinder having a compression space mounted between the reciprocating motors; a plurality of pistons respectively coupled to armatures of the reciprocating motors and inserted as sliding into the cylinder so that front end surfaces thereof face each other; a discharge valve assembly and a suction valve assembly for opening/closing a suction side and a discharge side of the compression space alternately so that the compression space of the cylinder can be communicated with the suction pipe and the discharge pipe alternately; spring supporting plates coupled to the armatures of the reciprocating motors; and oil kickers coupled to outer circumferential surfaces of the spring supporting plates for kicking the oil filled inside the casing during the reciprocating movements.
Also, to achieve the object of the present invention, there is provided an oil supplying apparatus for an opposed type reciprocating compressor comprising: a casing having a suction pipe and a discharge pipe which are communicated with each other on both sides thereof and having a predetermined amount of oil filled therein; a plurality of reciprocating motors installed on inner both sides of the casing to perform linear reciprocating movements toward opposite directions of each other; a cylinder including a compression space mounted between the reciprocating motors; a plurality of pistons coupled to armatures of the reciprocating motors and inserted as sliding into the cylinder so that front end surfaces thereof face each other; a discharge valve assembly and a suction valve assembly for opening/closing a suction side and a discharge side of the compression space alternately so that the compression space of the cylinder are communicated with the suction pipe and the discharge pipe alternately; and oil valves mounted on center portions of an oil paths, which are formed on inner cross section of the cylinder, for controlling flow of the oil.
Also, to achieve the object of the present invention, there is provided an oil supplying apparatus for an opposed type reciprocating compressor co
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Solak Timothy P.
Yu Justine R.
LandOfFree
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