Valves and valve actuation – Electrically actuated valve – Rotary electric actuator
Reexamination Certificate
2000-02-10
2001-06-12
Shaver, Kevin (Department: 3754)
Valves and valve actuation
Electrically actuated valve
Rotary electric actuator
C251S250500, C074S435000
Reexamination Certificate
active
06244564
ABSTRACT:
BACKGROUND OF INVENTION
Field of invention
This invention relates to a motor-type damper unit using a motor for opening/closing an opened/closed member such as a baffle with respect to an opening portion.
Hitherto, for example, a motor unit having a motor such as an AC synchronous motor or a stepping motor as a drive source as shown in
FIG. 17
has been known as a motor-type damper unit. (Refer to JP-A-6-109354.)
In
FIG. 17
, a motor-type damper unit
100
comprises a baffle
102
and a drive mechanism section
103
such as an AC synchronous motor placed with a rotation fulcrum shaft
101
between.
The motor-type damper unit
100
in the related art converts the rotation torque of the synchronous motor into the thrust direction torque of a spindle. The thrust direction torque of the spindle causes the baffle
102
to rotate on the rotation fulcrum shaft
101
. Thus, the rotation direction torque is converted into the thrust direction torque for opening/closing the baffle
102
.
The described motor-type damper unit
100
is used with a refrigerator
110
for controlling taking cold air into the refrigerator in a manner as shown in FIG.
18
. That is, the refrigerator
110
is separated into a freezer
111
, a cold room
112
, and a vegetable room
113
, the freezer
111
being provided with an evaporator
114
on the bottom. A fan motor
115
is disposed in the rear of the evaporator
114
for sending and circulating provided cold air to and through the freezer
111
and the cold room
112
. A compressor
119
for liquefying a cooling medium is placed in a lower part of the refrigerator
110
.
A partition plate
116
is placed between the evaporator
114
and the freezer
112
for shutting off a direct flow of cold air provided by the evaporator
114
into the cold room
112
. On the other hand, a cold air circulation passage
117
is formed between the rear of the partition plate
116
and the rear inner wall of the refrigerator
110
, and the motor-type damper unit
100
is disposed in the cold air circulation passage
117
. When the baffle
102
of the motor-type damper unit
100
is opened, the cold air circulation passage
117
for allowing cold air to flow enters a crank state. The motor-type damper unit
100
is installed in such a manner that it is held on a partition wall
118
forming a part of the cold air circulation passage
117
.
The motor-type damper unit
100
in the related art is of the type wherein it is orthogonal to the cold air circulation passage
117
as described above, and only the damper unit for bending the cold air flow at right angles can be used. Moreover, since the cold air circulation passage
117
becomes like a crank, a protuberance width of the partition wall
118
to the inside of the refrigerator
110
, M, grows as shown in
FIG. 18
, causing the volume of the refrigerator
110
to be decreased.
Further, the baffle
102
is not opened to a position at which it becomes parallel to the cold air flow, and is opened only to a slanting position as shown in
FIG. 18
, thus the baffle
102
becomes resistant to the cold air flow; it is not preferred for rapid diffusion of the cold air. For the motor-type damper unit
100
itself, a width of the drive mechanism section
103
, N, grows; the portion of the drive mechanism section
103
becomes a large dead space.
It is therefore an object of the invention to provide a motor-type damper unit using a one-way drive motor capable of rotating an opened/closed member such as a baffle in an open/closing direction.
REFERENCES:
patent: 4065980 (1978-01-01), Ichinose
patent: 4117739 (1978-10-01), Meier et al.
patent: 4144774 (1979-03-01), Berlinger, Jr.
patent: 4595081 (1986-06-01), Parsons
patent: 5018364 (1991-05-01), Chesnut et al.
patent: 5174546 (1992-12-01), Giordani
patent: 5310021 (1994-05-01), Hightower
patent: 5605072 (1997-02-01), Schmidt et al.
patent: 5727653 (1998-03-01), Grossenbacher et al.
patent: 5876014 (1999-03-01), Noritake et al.
patent: 6082206 (2000-07-01), Terada
patent: 6-109354 (1994-04-01), None
patent: 10-306970 (1998-11-01), None
Bastianelli John
Kabushuki Kaisha Sankyo Seiki Seisakusho
Shaver Kevin
Sughrue Mion Zinn Macpeak & Seas, PLLC
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