Electric heating – Microwave heating – Enclosed cavity structure
Reexamination Certificate
2001-10-26
2003-11-25
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
Enclosed cavity structure
C219S757000, C219S746000
Reexamination Certificate
active
06653610
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a microwave oven, and more particularly, to an improved electric outfit room having electric fittings provided therein for generation of a microwave.
2. Background of the Related Art
The microwave oven is a cooker in which a magnetron is used for generating, and permeating the microwave into a cooking object, to cause molecular movement therein for heating the cooking object, and recently, a microwave oven has appeared, which has a function of a cooker of its own as well as a ventilator for removal of heat, gas, and food smell generated at a gas oven range. In general, such a type of microwave oven is installed over a gas oven range, so as to be called as an OTR (Over-the-Range) type microwave oven.
A related art OTR type microwave oven will be explained briefly, with reference to
FIGS. 1 and 2
. In general, the gas oven range
200
is fitted between of kitchen sinks
600
, over which cupboards
400
are fitted. The microwave oven
100
is fitted between the cupboards
400
.
The related art OTR type microwave oven
100
is provided with a door part of a door and a control panel, a vent grill
160
above the door part, a cavity assembly
100
a
in rear of the door part, an air duct
506
above the cavity assembly
100
a
, and an out case covering the cavity assembly
100
a
and the air duct
506
. The cavity assembly
100
a
is provided with a front plate
110
of a front face of a cavity
1000
, a back plate
120
of a rear face of the cavity
1000
, and a base plate
130
fitted between bottoms of the front plate
110
and the back plate
120
. A space formed between the front plate
110
and the back plate
120
is divided by a partition wall ‘T’ into the cavity
1000
for cooking food therein and an electric outfit room for fitting electric components therein. That is, in the electric outfit room
300
, there is a magnetron
500
fitted to the partition wall ‘T’ for generating a microwave, a high voltage transformer
502
fitted to the back plate
120
, a high voltage capacitor
503
on the base plate
130
, a floor of the electric outfit room
300
, and a cooling fan
520
, a suction guide
510
, and a fan-motor assembly on one side of the front plate
110
. The high voltage transformer
502
may be fitted to a bottom of the base plate
130
. There is a vent motor
516
fitted to an upper surface
140
of the cavity
1000
near to the back plate
120
, on both sides of which sirocco fans
517
are fitted. There are suction holes
131
in right and left part of the back plate
130
for drawing heat and smoke from the gas oven range
200
below the microwave oven
100
.
The ventilation by the foregoing related art OTR type microwave oven will be explained with reference to
FIGS. 1 and 2
, briefly.
In order to discharge the heat and the smoke from the gas oven range
200
below the related art OTR type microwave oven
100
(called as “microwave oven”), the microwave oven
100
draws the heat and the smoke from the gas oven range
200
through the suction holes
131
in both sides of the base plate
130
of the microwave oven when the vent motor
516
fitted to the upper surface of the cavity
1000
comes into operation, which reaches to the sirocco fans
517
coupled to a shaft of the vent motor
516
along a discharge passage formed by the air guide
512
. Then, the heat and smoke reached to the sirocco fan
517
is drawn into the sirocco fan
517
in an axial direction, and discharged perpendicular to the axial direction, and discharged to outside of the microwave oven through a cleaning filer (not shown) and the vent grill
160
.
In the meantime, during cooking, the microwave oven is required to reject heat for normal operation because smoke and heat is generated in the cavity
1000
, and heat is generated at the magnetron
500
, the high voltage transformer
502
, and the high voltage capacitor
503
. To do this, the cooling fan
520
in the electric outfit room
300
is operated, to draw air through one side of the vent grill
160
into the electric outfit room along the air duct
506
, and, therefrom, to circulate from a front of the cooling fan
520
to rear of the cooling fan
520
,and to escape toward the cavity
1000
, a cooking chamber, through a vent hole
151
in the partition wall ‘T’. The air introduced into the cavity
1000
escapes through a discharge hole
141
in a top surface of the cavity
1000
, and discharged to outside of microwave oven through the vent grill
160
. In the process of such an air flow, the heat generated at the electric outfit in the electric outfit room
300
is rejected, and the heat, smoke, food smell, and the like produced in the cooking chamber are discharged.
However, the foregoing microwave oven has the following structural problems.
The related art microwave oven
100
requires a separate cooling fan
520
for cooling down the high voltage transformer
502
and the high voltage capacitor
503
because electric components, such as the high voltage transformer
502
and the high voltage capacitor
503
, are fitted to a lower part of the electric outfit room
300
. The provision of the separate cooling fan
520
for cooling down the electric outfit room
300
causes to require the air guide
512
for isolating the electric outfit room
300
from the heat and smoke form the gas oven range
200
, and the vent hole
151
in one side of the cavity
1000
for leading the air introduced into the electric outfit room
300
toward the cavity. According to this, a number of components, and required man-power are increased, and a structure of the electric outfit room
300
becomes complicate. Along with this, a structure of the air duct
506
in rear of the vent grill
160
for introduction of an external air into the electric outfit room
300
becomes complicate.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to an electric outfit room in a microwave oven that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide an electric outfit room in a microwave oven, in which a cooling fan and an air guide are eliminated, and structures of the air duct and the cavity are simplified, for reducing required number of components, and man power, and material cost in the fabrication, and improving a productivity.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the electric outfit room in a microwave oven includes a cavity assembly, and a partition wall for isolating a cavity from an electric outfit room, the cavity assembly having a front plate of a cavity, a back plate of the cavity in rear of, spaced a distance from, and opposite to, the front plate, and a base plate between the front plate and the back plate, and the cavity being formed between the front plate and the back plate for cooking food therein, wherein the electric outfit room has a wave guide vertically fitted to a rear part of the partition wall, having a magnetron fitted on an upper surface of the wave guide, and an electric outfit plate fitted at a height the same with the upper surface of the cavity.
The electric outfit plate includes a front surface and a rear surface fitted to the front plate and the back plate respectively, for fitting electric outfits, such as a high voltage transformer and a high voltage capacitor, on the electric outfit plate.
The wave guide includes a supporting member between the front plate and the back plate for supporting the wave guide under the wave guide.
The s
Fleshner & Kim LLP
Leung Philip H.
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