Electric heating – Microwave heating – With control system
Reexamination Certificate
2000-08-28
2001-11-20
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
With control system
C219S757000, C219S760000, C126S02100R
Reexamination Certificate
active
06320171
ABSTRACT:
CLAIM OF PRIORITY
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from my application MICROWAVE OVEN filed with the Korean Industrial Property Office on Nov. 16, 1999 and there duly assigned Ser. No. 50872/1999.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a microwave oven including a component chamber having a magnetron and high voltage transformers, and more particularly, a microwave oven including the component chamber having high voltage transformers disposed in a space formed in the top of a cooking chamber.
2. Description of the Related Art
Installation of a wall-mounted microwave oven has been proposed for a gas range for functioning as a hood. Typically, the wall-mounted microwave oven includes a cooking chamber, a component chamber formed in a side portion of the wall-mounted oven, an inlet formed on the bottom of the wall-mounted oven, an outlet formed on a top potion of the wall-mounted oven, and a duct disposed in the side portion to couple the inlet to the outlet. Since the wall-mounted oven is mounted over the gas range, the air generated from and heated by the gas range is blown into the duct through the inlet and discharged outside of the wall-mounted microwave oven through the outlet.
For example,
FIG. 1
shows a conventional microwave oven mounted over the gas range. The microwave oven includes a main body and a casing. The main body includes a cooking chamber, a control panel, and a component chamber. The casing enclosing the main body includes an upper casing
101
and a lower casing
103
assembled to the upper casing
101
.
The lower casing
103
has a pair of suction ports
119
for drawing in heated air generated from a gas range located below the microwave oven. The upper casing
101
has a discharge port
117
discharging out the heated air drawn into a space between the upper casing and the main body through the suction ports
119
. Below the discharge port
117
is installed a hood fan
121
for discharging out the heated air drawn from the suction ports
119
through the discharge port
117
.
Between the upper casing
101
and the lower casing
103
is installed a body
105
having a cooking chamber
107
. The space is formed between the upper casing
101
and the body
105
. In the body
105
is installed a partition
118
having a shape of “
” with a space being formed between the body
105
and sidewalls of the cooking chamber
107
. A second space formed between the upper casing
101
and the top of the body
105
is separated into two parts by an auxiliary partition
181
. On the top area between the upper casing
101
and the body
105
is installed a grill member
123
along the horizontal direction of a door
111
.
On the right sidewall of the cooking chamber
107
are formed a number of air inlet holes
108
which communicate with a space formed between the right sidewall of the cooking chamber
107
and the partition
118
. On the top plate of the cooking chamber
107
are formed a number of air outlet holes
109
which communicate with the space formed between the upper casing
101
and the body
105
. A tray
116
is provided within the cooking chamber
107
. In the front of the cooking chamber
107
is installed the door
111
for opening and closing the cooking chamber
107
. In the right area of the door
111
is installed a control panel
113
having a number of buttons for operating the microwave oven.
Beside the air inlet holes
108
formed on the right sidewall of the cooking chamber
107
is formed a shield bracket
189
having a L shape for shielding the air inlet holes
108
. On the top plate of the cooking chamber
107
are formed a flange part
187
having a number of elongated holes
188
. The flange part
187
located behind the control panel
113
, and an isolating bracket
183
isolating the flange part
187
from the second space between the upper casing
110
and the top plate of the body
105
.
In the microwave oven with this configuration, a variety of components are positioned in the space formed between the right sidewall of the cooking chamber
107
and the body casing
105
and located behind the control panel
113
. That is, a high-voltage transformer
131
, a low-voltage transformer
190
, a high-voltage condenser
163
are installed on the bottom plate of the body
105
whereas a magnetron
153
is installed adjacent to the air inlet holes
108
of the cooking chamber
107
. In addition, a fan
125
supported by a support bracket
185
is slantly positioned between the magnetron
153
and the back side of the body casing
105
.
In the microwave oven, cooling of the components such as high-voltage transformer
131
and removal of fumes generated within the cooking chamber
107
during cooking are carried out by the following processes. Outdoor air is drawn in through the grill member
123
and guided into the bottom part of the space formed between the right sidewall of the cooking chamber
107
and the body casing
105
through the elongated holes
188
formed in the flange part
187
. The air guided into the bottom part of the space between the right sidewall of the cooking chamber
107
and the body
105
, cools the high-voltage condenser
163
, the low-voltage transformer
190
, and the high-voltage transformer
131
in sequence. Thereafter, the air is blown into the cooking chamber through the air inlet holes
108
by the fan
125
after cooling the magnetron
153
.
A large part of the air blown by the fan
125
passes through the air inlet holes
108
, the inside of the cooking chamber
107
, and the air outlet holes
109
sequentially, and is then discharged outside through the grill member
123
. The remaining of the air passes a space between the auxiliary partition
181
and the bracket
183
and is then discharged outside through the grill member
123
.
The component chamber including a magnetron and a plurality of high voltage transformers is located in the side portion and adjacent to the duct through which the air containing fumes and smoke passes. If the duct is not sealed, the fumes and smoke may blow into the component chamber and damage the components. Moreover, since the components and the duct are located in the same side portion of the oven, the cooking chamber can not be enlarged. The size of the cooking chamber is relatively small in comparison with the whole size of the oven. Furthermore, a passage of outdoor air drawn from outside of the oven into the component chamber is too complicated to efficiently cool the components located in the component chamber. It is difficult to efficiently discharge the heat generated from the components, such as a high-voltage transformer, outside of the oven.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved microwave oven.
It is another object to provide a microwave oven providing a larger cooking chamber.
It is yet another object to provide a microwave oven able to efficiently discharge the heat generated from a high voltage transformer.
It is still another object to provide a microwave oven able to reduce height of high-voltage transformers in order to be disposed within a space between a casing and a top plate of a cooking chamber.
It is a further object to provide a microwave oven with a smaller size of high-voltage transformers.
It is also an object to provide a microwave oven able to improve the passage of air cooling.
These and other object may be achieved with a microwave oven constructed with a body having a cooking chamber, an outer casing enclosing the body casing, a magnetron supplying the cooking chamber with microwaves, and a plurality of high-voltage transformers supplying a driving voltage to the magnetron, the magnetron and the high-voltage transformers installed in series in a space formed between a top plate of the body and the outer casing. A cooling system controlling the temperature of the high-voltage transformer may be constructed with an inlet grill member installed to communi
Bushnell , Esq. Robert E.
Leung Philip H.
Samsung Electronics Co,. Ltd.
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