Refrigeration – Automatic control – Of external fluid or means
Reexamination Certificate
1999-07-27
2001-10-16
Tanner, Harry B. (Department: 3744)
Refrigeration
Automatic control
Of external fluid or means
C062S182000
Reexamination Certificate
active
06301910
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of invention
The present invention relates to a refrigerator having a damper device to control taking-in of cooling air and a fan motor to send the cooling air.
2. Related art
Conventionally, a motor type damper device is adopted in a refrigerator (Unexamined Japanese Patent Publication Hei. 6-109354, 9-138052, etc.). A motor type damper device
50
disclosed in Unexamined Japanese Patent Publication Hei. 6-109354, is used for a refrigerator
60
separated into a freezing room
61
, a refrigerated room
62
and a vegetable room
63
as shown in FIG.
5
. An evaporator
64
is provided on the bottom of the freezing room
61
, and a fan motor
65
and an air blower
66
driven by the fan motor
65
are arranged in a rear portion of the evaporator
64
. The obtained cooling air is sent to the freezing room
61
or the refrigerated room
62
by the air blower
66
. The evaporator
64
absorbs heat of the surroundings when a cooling medium compressed by a compressor
67
is evaporated, and generates cooling air.
A partition plate
68
a
serving as a partition wall is provided between the evaporator
64
and the refrigerated room
62
and shuts off the cooling air of the evaporator
64
directly flowing to the refrigerated room
62
. On the other hand, a cooling air flowing path
69
is formed between the rear portion of the partition plate
68
a
and the inner wall of the rear portion of the refrigerator
60
, and a damper device
50
is arranged in the cooling air flowing path
69
.
When a baffle
52
of the damper device
50
is opened, the cooling air flowing path
69
, which is a path of the cooling air, is opened in the form of a clank. The damper device
50
is provided in such manner that it is held by a partition wall
68
b
which is a partition wall forming a portion of the cooling air flowing path
69
. In this connection, a damper motor
53
is structured by an AC synchronous motor and conducts the open and close operations of the baffle
52
.
Further, a motor type damper device
70
disclosed in Unexamined Japanese Patent Publication Hei. 9-138052, is built in a refrigerator
80
in the form as shown in FIG.
6
. Herein, the same members as those shown in
FIG. 5
will be shown by the same numerical codes as those in
FIG. 5
, and the explanation will be omitted.
In this refrigerator
80
, a duct
81
whose both ends are opened so as to send the cooling air to the vegetable room
63
, is formed as shown in
FIG. 6
, and a motor type damper device
70
is fitted in a portion leading into the vegetable room
63
in the duct
81
. That is, this damper device
70
is fitted in such that a frame
71
of the damper device
70
forms a portion of the duct
81
, and the damper device
70
itself serves also as the duct
81
. In this connection, the drive source of the motor type damper device
70
is a stepping motor, and opens and closes the baffle
72
.
In the refrigerators
60
and
80
using the motor type damper devices
50
and
70
, these damper device
50
and
70
are operated by temperature sensors in the refrigerated room
62
and vegetable room
63
. Concretely, the refrigerators are controlled by a control circuit
91
as shown in FIG.
7
. That is, the fan motor (FM)
65
is connected in parallel to the compressor (CP)
67
to operate the evaporator
64
, and both members
65
and
67
are controlled by a thermo-switch
92
for the freezing room
61
. On the other hand, in the refrigerated room
62
, a bimetal thermo-switch
93
for the damper is provided, and the motor type damper device
50
is connected to it. The bimetal thermo-switch
93
for the damper has an open-terminal
93
a
to open the baffle
52
of the damper device
50
so as to take in the cooling air when the room temperature is higher than a setting temperature value, and a close-terminal
93
b
to close the baffle
52
so as to shut off the cooling air when the room temperature is lower than a setting value which is set lower than the above-described setting temperature value.
The motor type damper device
50
has a damper motor
94
structured by an AC synchronous motor or a stepping motor; a close-operation switch
95
which supplies a current to the damper motor
94
until, when the bimetal thermo-switch
93
contacts the closing terminal
93
b
side, the baffle
52
of the damper device
50
is operated in the closing direction and the baffle is fully closed, and which is opened and stops the current supply when the baffle
52
is closed; and an open-operation switch
96
which is interlocked with the close-operation switch
95
simultaneously when it is opened, and which conducts an on-operation, that is, close operation.
Incidentally, the structure and operations of the motor type damper device
70
are also the same as those of the motor type damper device
50
, and therefore, the explanation will be omitted.
The conventional refrigerators
60
and
80
having the motor type damper devices control the motor type damper devices
50
and
70
by the bimetal thermo-switch
93
, or the like, in the refrigerated room
62
or vegetable room
63
. However, only making the motor type damper devices
50
and
70
on and off, it is difficult to conduct the cooling of the refrigerated room
62
or vegetable room
63
at high speed.
For example, in the case where the fan motor
65
provided on the rear portion of the evaporator
64
is operated, when the baffle
52
of the motor type damper device
50
for the refrigerated room
62
is opened, the temperature of the refrigerated room
62
is quickly lowered and reaches a predetermined value soon. However, in the case where the fan motor
65
is not operated, even if the motor type damper device
50
is opened, the cooling air hardly enters into the refrigerated room
62
. Accordingly, in this case, it requires a long period of time to cool down the temperature to a predetermined value.
SUMMARY OF INVENTION
The present invention is accomplished to solve the above problems, and the object of the present invention is to provide a refrigerator which can cool rooms in the refrigerator surely and quickly by using the damper device.
In order to solve the above-described problems, a refrigerator of the present invention comprises: a plurality of rooms separated by partition walls; an air blower to send cooling air cooled by an evaporator into a refrigerator box; a fan motor to drive the air blower; a damper device to adjust a cooling air amount flowing into at least one of the plurality of rooms; and a control means for driving the fan motor just before the baffle of the damper device is opened.
Further, a refrigerator of the present invention comprises: a plurality of rooms separated by partition walls; a compressor to operate an evaporator to cool inside the refrigerator box; the first temperature sensor to detect the temperature of the first room cooled by the evaporator and to on-off control the compressor; a damper device to adjust an amount of the cooling air flowing into the second room which is different from the first room; the second temperature sensor to detect the temperature of the second room in order to control the open and close of a baffle of the damper device; an air blower to feed the cooling air cooled by the evaporator into the refrigerator box; a fan motor to drive the air blower; and the third temperature sensor which operates so as to drive the fan motor just before, or simultaneously with, or just after the open operation of the baffle of the damper device, is connected to the fan motor in series.
Further, a refrigerator of the present invention comprises: a plurality of rooms separated by partition walls; a compressor to operate an evaporator to cool inside the refrigerator box; an air blower to send cooling air cooled by the evaporator into a refrigerator box; a fan motor to drive the air blower; a damper device to adjust an amount of a cooling air of at least one room of the amounts of cooling air flowing into the plurality of rooms; and a control means for driving the fan motor when the baffle of
Miyazawa Yukimori
Nakajima Yoshihiko
Nishikawa Kazunori
Noritake Seiichiro
Ali Mohammad M.
Kabushiki Kaisha Sankyo Seiki Seisakusho
Sughrue Mion Zinn Macpeak & Seas, PLLC
Tanner Harry B.
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