JPH0313741A - Heating cooker - Google Patents

Abstract

PURPOSE:To reduce an unpleasant sensation felt when a door is opened to take out a cooked food from a cooking chamber by rapidly discharging a bad smell and a lampblack by providing a heating cooker with exhaust fan rotation control means for controlling an exhaust fan so as to be rotated in a low speed in cooking and in a high speed when the door of the cooking chamber is opened. CONSTITUTION:When a door 4 is closed to conduct a cooking, a control processor 17 outputs a control signal so as to keep an exhaust fan motor 23 to a low rotational speed based on the nonoperative signal of a door switch 7. When the cooking is finished and the door 4 is opened, control means 24 control via the control processor 17 so as to increase the rotational speed of the exhaust fan motor 23 based on the operation signal of the operated door switch 7. Therefore, since an exhaust fan 15 is rotated in a high speed and the amount of the exhausted air is increased, the air including a bad smell and the particles of a lampblack is rapidly drawn out of a chamber 3 to be discharged with the bad smell and the lampblack removed by a catalytic oxide 14. Thus, an unpleasant sensation can be reduced when the cooked food is taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is used for cooking food using an electric oven, gas oven, etc. equipped with an exhaust device that deodorizes and eliminates oily smoke, odors, etc. generated during cooking. The present invention relates to a heating cooking device.

(B) Prior Art Conventionally, Japanese Patent Publication No. 62-237930 discloses a means for deodorizing and eliminating oily smoke and odor generated from foods by heating in this type of heating cooking apparatus.

An exhaust gas purification catalyst is installed in the exhaust passage that communicates with the inside of the refrigerator.
A system has been proposed in which exhaust gas is drawn into an exhaust passage by an exhaust fan, purified by a purification catalyst, and then discharged to the outside of the refrigerator.

(c) The invention attempts to solve the problem. However, in the conventional apparatus disclosed in the above-mentioned publication, the exhaust fan rotates at a constant speed during and after cooking. Therefore,
The exhaust air volume is fixed at a constant state.

As described above, if the exhaust air volume is constant, it is difficult to sufficiently quickly expel odor and oil smoke from inside the refrigerator, which is required in the following cases. In other words, ■ When you want to avoid the discomfort caused by odor and oil smoke when opening the door to take out cooked food from the refrigerator.

■ When you want to prevent previous cooking utensils from adhering to the next cooking item to be heated.

■ When you want to exhaust the oil smoke and odor from the inside of the cooking chamber before it cools down and the generated oil smoke and odor particles tend to adhere to the inner surface.

etc., it could not be an effective means.

The present invention has been made in view of the above points, and allows the exhaust air volume to be varied so that the exhaust air volume can be increased when necessary.
An object of the present invention is to provide a heating cooking device capable of rapid deodorization and smoke elimination.

(d) Means for Solving the Problems The heating cooking device of the present invention includes a cooking chamber in which objects to be heated are stored and heated and cooked, and an oxidation catalyst that deodorizes and eliminates odors and oil smoke generated from the cooking chamber. and an exhaust fan that sucks air from inside the refrigerator and blows air to the removal device. An exhaust fan rotation control means is provided for controlling the exhaust fan to rotate at a low speed during the I-cooking process and to rotate at a high speed when the cooking chamber door is opened.

(e) Function: During cooking, the exhaust fan is rotated at low speed to prevent the temperature inside the refrigerator from dropping significantly, and highly concentrated odor and oily smoke particles are oxidized and removed using an oxidation catalyst, making them odorless and harmless before being released outside the refrigerator. discharge. After heating, the exhaust fan rotates at high speed in conjunction with the opening of the door, and air containing odor and oily smoke particles is rapidly sucked out of the refrigerator, and is deodorized and smoked through the action of an oxidation catalyst. It is odorless and harmless and released into the room.

(F) Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. 1st
The figure shows an external perspective view of the heating cooking device according to the present invention, FIG. 2 shows a front sectional view, FIG. 3 shows a side sectional view, and FIG. 4 shows a control block diagram.

In each figure, 1 is the main body of the cooking device, which is an outer casing of a cooking device called a microwave oven, which has a built-in magnetron and far-infrared heater as heating means, and 2 is the inner surface that forms the cooking chamber 3 inside the main body 1. , its front opening 2A is door 4
It is closed so that it can be opened and closed. Further, a cooking timer 5 is provided on the right side of the front opening 2A. and,
A door switch 7 is provided at the opening edge 6 of the front opening 2A. The door switch 7 operates to switch the rotational speed of a drive motor for an exhaust fan, which will be described later, by opening and closing the door 4. Next, in FIG. 2, heaters 8, 8 are arranged above and below inside the inner surface 2,
Heater surface plates 9, 9 are disposed on the surfaces of the heaters 8, 8, and are made of a material that emits electromagnetic waves having a wavelength equal to or greater than the wavelength value with high efficiency. 10 is a heat insulating material, and 11 is a magnetron that emits microwaves. On the other hand, an oxidation catalyst heating heater 13 is provided in the exhaust passage 12 communicating with the cooking chamber 3.
and an oxidation catalyst 14 using platinum, palladium, or the like. An exhaust duct 16 into which an exhaust fan 15 is inserted is connected to the downstream side of the exhaust passage 12.

Next, a description will be given with reference to FIG. 4, which shows the configuration of a control block that changes the rotation of the exhaust fan 15 based on the opening and closing of the door 4. Reference numeral 7 denotes a door opening/closing detection means, which specifically corresponds to a door switch. The control processing section 17 consisting of a microcomputer is connected to the input section 1
8 is transmitted to the control unit 19, information is exchanged with the storage unit 20 that stores appropriate cooking times and cooking output values, etc. according to the type of food, and the results are transmitted to the output unit 21, and the display device In addition to displaying cooking time, heating temperature, etc. on 22,
The exhaust fan motor 23 is activated by the output signal from the output section 21.
The control means 24 for controlling the rotational speed of is operated.

For example, while cooking with door 4 closed,
Based on the inoperation signal of the door switch 7, the control processing unit 17
outputs a control signal to slow down the rotation of the exhaust fan motor 23 to rotate the exhaust fan motor 23 at a low speed;
Based on the exhaust air volume within a range that does not affect the heating temperature during cooking, the exhaust fan 15 removes oily smoke and odors caused by cooking.
is sucked out of the warehouse 3, and then deodorized by the oxidation catalyst 14.
The smoke is extinguished and exhausted to the outside through the exhaust duct 16. On the other hand, when the door 4 is opened after cooking, the door switch 7
is activated, and based on the operation signal, the control means 24 controls the exhaust fan motor 23 to rotate at high speed via the control processing section 17. Therefore, the exhaust fan 15 rotates at high speed and increases the exhaust air volume, so that odors and
The air containing oil smoke particles is sucked outside 11!3, is deodorized and smoked in the same way by the oxidation catalyst 14, and is released into the room where this cooking device is installed as odorless and harmless. Ru. In addition, the volume of the oxidation catalyst and the volume of the heater 13 for heating the catalyst are installed so that the oxidation catalyst function for deodorization and smoke elimination does not deteriorate even when the exhaust fan 15 rotates at high speed. Therefore, in this way, the odor and oily smoke inside the refrigerator 3 are quickly expelled, eliminating discomfort when taking out cooked food, and preventing the previous cooking utensils from adhering to the next cooking item. , prevents oil smoke and odor particles from adhering to the inner surface of the cooker.

(G) As described in detail, according to the present invention, the exhaust fan that discharges oily smoke and odor generated during cooking to the outside of the cooking cabinet can be changed between high and low speeds in conjunction with the opening and closing of the cooking cabinet door. Therefore, when the door is opened to take out cooked food from the refrigerator, odor and oily smoke are quickly exhausted, reducing discomfort when taking out cooked food. Even when cooking is continued, the remaining cooking utensils are less likely to adhere to the next cooking item. Further, it is possible to provide a heating cooking device that exhibits various effects, such as less staining of cooking utensils on the inner wall of the refrigerator, making it possible to maintain good sanitary conditions.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of the heating cooking apparatus of the present invention, FIG. 2 is a front sectional view, FIG. 3 is a side sectional view, and FIG. 4 is a control block diagram. 1... Apparatus body, 2... Inner surface, 3... Cooking chamber, 4
...Door, 7...Door switch, 8...Heater, 1
1... Magnetron, 14... Oxidation catalyst, 15.
...Exhaust fan, 16...Exhaust duct, 23...Exhaust fan motor.

Claims (1)

[Claims] A cooking chamber in which objects to be heated are stored and heated, a removal device including an oxidation catalyst, etc. that deodorizes and eliminates oil smoke and odor generated from the cooking chamber; A heating cooking apparatus having an exhaust fan that blows air, characterized by being provided with an exhaust fan rotation control means that controls the exhaust fan to rotate at a low speed during cooking and to rotate at a high speed when the cooking chamber door is opened. A heating cooking device.