JPS5812503B2 - gas oven - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas oven that uses a circulation fan to introduce and circulate hot combustion air into a roasting chamber.

Conventionally, in this type of gas oven, a rectifying plate is installed to protrude into the roasting chamber so as to cover the circulation fan and the hot air intake port.

As a result, the inside of the roasting chamber is narrow and the current plate is also heated, so extra hot air is required, resulting in a lot of waste.

In view of this, the present invention eliminates the above-mentioned drawbacks by removing the baffle plate, which is essential for circulating hot air in this type of gas oven.

An embodiment of the present invention will be described with reference to the drawings below. Reference numeral 1 denotes a roasting chamber provided within an exterior casing 2, and a door 3 that can be opened and closed is provided at the front opening.

A magnetron 4 supplies microwaves into the roasting chamber 1 and is introduced into the roasting chamber 1 surrounded by a heat-resistant partition plate 6 through a waveguide 5.

Reference numeral 7 denotes a combustion chamber provided inside the exterior 2 at the bottom of the roasting chamber 1, in which a gas burner 8 is installed.

Reference numeral 9 denotes a fan storage chamber provided at the back of the roasting chamber 1 in communication with the fan storage chamber, which has a rectangular shape that is long in the horizontal direction when viewed from the front of the roasting chamber 1, and has a centrifugal fan rotated by a motor 10 in the center thereof. A type circulation fan 11 is installed.

As is well known, the circulation fan 11 sucks in air from the center and releases accelerated air from the surrounding area.

Therefore, the air in the roasting chamber 1 sucked in from the center of the fan is discharged toward the inner wall of the storage chamber 9, but there are parts where the pressure of the accelerated air applied to the inner wall of the storage chamber is strong and parts where it is weak.

That is, when the fan 11 is rotating at high speed in the counterclockwise direction as shown in FIG. The pressure of the accelerated air strongly hits the wall of the storage room (in front) and gradually weakens.

This state is indicated by the length dimension of the arrow in FIG.

In the lateral direction, where the distance between the outer periphery of the fan 11 and the storage wall is long, only a substantially uniform weak pressure is applied to the storage interior wall.

Therefore, an intake port 12 communicating with the combustion chamber 7 is formed in a portion of the lower wall of the storage chamber 9 where the pressure of the acceleration air is weak, while an exhaust port communicating with the outside is formed in a portion of the upper wall of the storage chamber where the pressure of the acceleration air is strong. form 13.

Then, due to the pressure difference between the intake port 12 and the exhaust port 13, hot combustion air from the gas burner 8 is introduced from the intake port 12 through the storage chamber 9 into the roasting chamber 1, and the exhaust gas in the roasting chamber 1 is introduced into the roasting chamber 1 through the exhaust port. 13 to the outside.

On the other hand, the accelerated air from the fan that is in contact with the wall of the storage chamber is radiated in the direction of the roasting chamber 1, and the inside of the roasting chamber is
As shown in the figure, the inside of the roasting chamber 1 is rapidly heated by following the path where it circulates and is sucked into the fan 11.

On the other hand, by oscillating the magnetron 4 and using it in conjunction with microwave heating and combustion heating, this oven can perform everything from thawing to roasting of frozen foods.

The fan storage chamber 9 of the present invention may have a horizontally elongated elliptical shape, as long as the pressure of the accelerated air from the circulation fan 11 is applied non-uniformly.

As described above, the present invention separates a combustion chamber having a burner and a roasting chamber, and communicates with the roasting chamber a fan storage chamber whose inner wall is formed into a non-circular shape. A fan is installed, and the pressure of the accelerated air by the fan is applied non-uniformly to the inner side wall of the storage chamber, and the part where the pressure of the accelerated air applied to the inner side wall of the storage chamber is low is communicated with the combustion chamber to roast the combustion hot air. It forms an intake port for introducing the accelerated air into the room, and also has an exhaust port that communicates with the outside where the pressure of the accelerated air is high. The existing current plate can be omitted,
The roasting chamber can be used more widely, and since the hot air does not heat the current plate, thermal efficiency is also improved, which has great effects.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the main part of the gas oven of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a cross-sectional view of the main part of the fan storage chamber for explaining the principle of operation. 1... Roasting room, 9... Fan storage room,
11...Circulation fan, 12...Intake port, 13...Exhaust port, 7...Combustion chamber.

Claims (1)

[Claims] 1 A combustion chamber having a burner and a roasting chamber are separated and provided,
A fan storage chamber with a non-circular inner wall is connected to the roasting chamber, and a circulation fan is installed in this storage chamber, so that the pressure of the accelerated air generated by the fan is distributed unevenly to the inner wall of the storage chamber. The part where the pressure of the accelerated air applied to the inner side wall of the storage chamber is low communicates with the combustion chamber to form an intake port for introducing combustion hot air into the roasting chamber, and the part where the pressure of the accelerated air is high is communicated with the outside. A gas oven characterized by having an exhaust port.