Refrigeration – Automatic control – Refrigeration producer
Reexamination Certificate
2000-09-13
2002-05-07
Wayner, William (Department: 3744)
Refrigeration
Automatic control
Refrigeration producer
C062S525000, C165S286000
Reexamination Certificate
active
06381974
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a refrigerant distributor of a refrigerating cycle for a heat pump, in particular to the refrigerant distributor of the refrigerating cycle for the heat pump which is capable of distributing uniformly a refrigerant to a evaporator by using variably the capacity of the evaporator in accordance with discharge quantity of the refrigerant discharged variably from a variable capacity compressor by using discharge pressure of the refrigerant discharged variably from the variable capacity compressor comprised in the refrigerating cycle for the heat pump.
2. Description of the Conventional Art
In general, a refrigerating cycle comprises a compressor for compressing a working fluid so as to be high temperature and high pressure, a condenser for discharging an internal heat to the outside by converting the compressed high temperature and high pressure working fluid into liquid phase, an expansion device for lowering pressure of the liquid phase working fluid, and a evaporator for absorbing an external heat by vaporizing the liquid phase working fluid expanded in the expansion device into gas. The condenser and evaporator perform the heat exchange to the outside, accordingly they are also called as heat exchangers.
The refrigerating cycle apparatus is applied to a refrigerator, a showcase for preserving food freshly and an air conditioner for keeping a room temperature pleasantly in accordance with an outside temperature.
The air conditioner is classified into a general air conditioner having a cooling function and a heat pump air conditioner having both cooling and heatingfunctions.
As depicted in
FIG.1
, in the refrigerating cycle for the heat pump air conditioner, a 4-way valve
20
for switching a flow direction of the refrigerant is connected to a discharge side of a compressor
10
for compressing the refrigerant, an external heat exchanger
30
is connected to the side of the 4-way valve
20
, an expansion device
40
is connected to the external heat exchanger
30
, and an internal heat exchanger
50
is connected to the expansion device
40
.
And, the internal heat exchanger
50
is connected to the 4-way valve
20
and the suction side of the compressor is connected to the 4-way valve
20
.
The each part is connected each other by connection pipes
60
.
A sirocco fan
70
for moving the air heat-exchanged in the internal heat exchanger
50
is installed on the side of the internal heat exchanger
50
, and a axial-flow fan
80
for accelerating the heat exchange of the external heat exchanger
30
is installed on the side of the external heat exchanger
30
.
The refrigerating cycle for the heat pump cools/heats a room by the internal heat exchanger
50
performing the function of the evaporator or condenser in accordance with the flow direction of the refrigerant discharged from the compressor
10
converting the flow direction by switching of the 4-way valve
20
.
First, in the cooling operation, the flow direction of the 4-way valve is set in order to make the refrigerant discharged from the compressor
10
flow directly to the external heat exchanger
30
, and at the same time get the internal heat exchanger
50
lead to the compressor
10
. On the base of the structure, the refrigerant circulates through the compressor
10
—4-way valve
20
—external heat exchanger
30
—expansion device
40
—internal heat exchanger
50
—4-way valve
20
—compressor
10
in accordance with the operation of the compressor
10
.
In the circulation, the external heat exchanger
30
performs the function of the condenser, and the internal heat exchanger
50
performs the function of the evaporator. The cool air is generated by the internal heat exchanger
50
performing the function of the evaporator, and the cool air cools the room by ventilating the room by the operation of the sirocco fan
70
. Also, the heat exchange of the external heat exchanger
30
, namely, heat releasing is accelerated by the operation of the axial-flow fan
80
.
In the heating operation, the flow direction of the 4-way valve is set in order to make the coolant discharged from the compressor
10
flow directly to the internal heat exchanger
50
, and at the same time get the external heat exchanger
50
lead to the compressor
50
. On the base of the structure, the coolant circulates is by passing through the compressor
10
—4-way valve
20
—internal heat exchanger
50
—expansion device
40
—external heat exchanger
30
—4-way valve
20
compressor in accordance with the operation of the compressor
10
.
In the circulation, the internal heat exchanger
50
performs the function of the condenser, and the external heat exchanger
30
performs the function of the evaporator. The warm air is generated by the internal heat exchanger
50
performing the function of the condenser, and the warm air heats the room by ventilating the room by the operation of the sirocco fan
70
. Also, the heat exchange of the external heat exchanger
30
, namely, the heat releasing is accelerated by the operation of the axial-flow fan
80
.
In the heating operation of the refrigerating cycle for the heat pump,-when the liquid phase refrigerant passed through the internal heat exchanger
50
flows to the external heat exchanger
30
after passing through the expansion device
40
, herein when the refrigerant passed through the expansion device
40
directly flows to the external heat exchanger
30
, the evaporation is not sufficiently performed in the external heat exchanger
30
. Accordingly, as depicted in
FIG.2
, a distributor
90
for providing after distributing the coolant passed through the expansion device
40
to the external heat exchanger
30
is installed between the expansion device
40
and external heat exchanger
30
in order to accelerate the evaporation in the external heat exchanger
30
.
As depicted in
FIG. 3
, the conventional structure of the distributor for distributing the refrigerant in the refrigerating cycle of the heat pump comprises a body unit
91
having a hollow cone shape and a plurality of branching pipes
92
connected to a flat surface of the body unit
91
. The top point of the body unit
91
is combined to the connection pipes
60
, and the plurality of the branching pipes
92
are connected to the external heat exchanger
30
.
The external heat exchanger
30
comprises a plurality of blocks, and the each block is connected to the each branching pipe of the distributor
90
.
In the operation of the conventional distributor
90
, the refrigerant in the state of different phase passed through the expansion device
40
flows to the body unit
91
of the distributor
90
through the connection pipe
6
D, is divided by the plurality of the branching pipes
92
, and flows to the each block of the external heat exchanger
30
. The refrigerant flown into the each block of the external heat exchanger
30
evaporates while passing through the each block, the evaporated refrigerant is gathered through the one flow channel, is passed through the 4-way valve, and is sucked into the compressor
10
.
In the refrigerating cycle for the heat pump, the operating speed of the compressor
10
is variable in accordance with the load on the internal heat exchanger
50
, namely, the temperature of the room. When the load pressed on the internal heat exchanger
50
is small and the compressor
10
operates in the low speed, the discharge quantity of the refrigerant discharged from the compressor
10
is partly small, and the partly small quantity of the refrigerant circulates in the evaporator circuits. In addition, when the load pressed on the internal heat exchanger
50
is big and the compressor operates in the high speed, the discharge quantity of the refrigerant is relatively large, and the large quantity of the refrigerant circulates in the evaporator circuits.
However, in the conventional refrigerant distributing structure of the refrigerating cycle for the heat pump, in spite of variable flow quantity of the refrigerant circulating the cy
Hwang Yoon Jei
Kim Cheol Min
Kim Yang Kyu
Park Jong Han
Birch, Stewart, Kolasch and Birch LLP
LG Electronics Inc.
Wayner William
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