JPH08100925A - Heating cooker - Google Patents

Abstract

PURPOSE: To control the burned part of a work to be heated, such as a food and the like, in accordance with the object of cooking and obtain excellint finishing. CONSTITUTION: A heating cooker is constituted of an oven chamber 6, receiving a work to be heated 7, such as a food and the like, a secondary radiating body 4, having an area larger than the radiation area of a radiation heater 3 for changing the wavelength distribution of the radiation heater 3, and a secondary radiation body driving device 5, moving the secondary radiation body 4 between the radiation heater 3 and the work to be heated 7 based on a signal from a control means 2. According to this constitution, the wavelength distribution of two kinds or more are radiated by one piece of radiation heater to control the burned part of the food 7 whereby excellent finish of cooking can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker such as a microwave oven for heating an object to be heated such as food by a heater.

[0002]

2. Description of the Related Art Conventionally, a heating cooker such as a microwave oven has been heated by a radiant heater having a wavelength distribution of a certain range from near infrared rays to infrared rays and far infrared rays. However, such heating has a drawback that the food is irradiated with only heat having a single wavelength distribution and the food is too charred. As a technology to perform appropriate heating according to the type of food
As disclosed in Japanese Patent Publication No. 87011-, a far-infrared heater and a near-infrared heater are alternately arranged so that grilled fish, chicken, etc. can be heated to the inside while being browned on the surface. As disclosed in Japanese Unexamined Patent Publication No. 64-3423, by providing the lower heater among the upper and lower heaters on the outer side of the bottom surface, the temperature of the upper heater becomes high and the temperature of the lower heater becomes low, and the temperature of the lower heater becomes low, and far infrared radiation is emitted. A configuration is proposed that

[0003]

However, in such conventional heating, if the far-infrared heaters and the near-infrared heaters are alternately arranged, the number of heaters is required according to the type of radiation wavelength distribution, and the structure becomes complicated. . Further, since far-infrared rays and near-infrared rays are emitted from different positions to food, for example, when far-infrared rays are emitted from the upper heater to near-infrared rays from the lower heater, the upper heater side of the food is charred. Also, there was a problem that the lower heater was difficult to attach and the non-uniformity was generated.

Further, as a technique for achieving both the rising speed of a halogen lamp and the burning performance of infrared radiation heating, as disclosed in JP-A-1-163525, the entire surface of the heater is ceramic-coated to emit radiation. A configuration has been proposed in which the wavelength distribution is centered in the infrared to far-infrared region, but since the radiation wavelength is determined by the type and coating area of the ceramic coat, there is the problem that a single heater can radiate only a certain range of wavelength distribution. there were.

In order to solve the above conventional problems, the present invention provides
One heater can be switched to a wavelength distribution centering on far infrared rays and near infrared rays, which simplifies the structure and aims to realize a cooker that does not easily scatter while controlling the scorching depending on the food to be cooked. Is the first purpose.

A second object is to shorten the cooking time by increasing the temperature rise of the radiation generating means in addition to the first object.

[0007]

In order to solve the above-mentioned problems, the heating cooker of the present invention has the structure described later.

That is, an oven for storing an object to be heated, a radiant heater for heating the object to be heated, and a secondary radiation heated by the radiant heater to radiate secondary radiation, thereby heating the Buddha to be heated. A body, a secondary radiant body driving device for moving the secondary radiant body, and control means for controlling the secondary radiant body driving device to adjust the position thereof, the control means corresponding to a cooking menu. The secondary radiator is moved between the radiation heater and the object to be heated or outside.

A radiation heater having a wavelength distribution centered on near infrared rays and a wavelength heater having a wavelength distribution centered on far infrared rays 2
It is composed of a secondary radiator.

Further, the radiation area of the secondary radiator is set to be larger than the radiation area of the radiation heater. Further, in order to obtain radiation of various kinds of wavelength distribution, it is composed of a plurality of secondary radiators.

Further, the distance between the radiant heater and the secondary radiator is made variable. Further, an oven for storing the object to be heated, at least two radiation heaters for heating the object to be heated, and at least one for heating the object to be heated by radiating secondary radiation heated by the radiant heater Two secondary radiators, a secondary radiator driving device for moving the secondary radiators, and control means for controlling the secondary radiator driving device to adjust its position. According to the menu, at least one of the secondary radiators is configured to move the radiant heater to or from an object to be heated.

Further, an oven cabinet for storing the object to be heated,
A coating radiant heater consisting of a near-infrared permeable tube, whose outer surface is coated with an infrared radiant film, and a filament with a wavelength distribution centered on the near-infrared radiated inside this tube, and a coating radiant heater It comprises a radiant heater driving device for rotating in the circumferential direction and a control means for controlling the secondary radiant body driving device to adjust the position of the infrared radiation film, and the control means controls the infrared radiation film according to a cooking menu. It was configured to be moved between the filament and the object to be heated or outside.

Further, at least two coating radiant heaters and at least one radiant heater driving device for driving the coating radiant heaters are provided, and at least one of the secondary radiators is coated radiant heater according to a cooking menu. The filament is moved between the filament and the object to be heated or outside.

[0014]

According to the present invention, when the object to be heated, which has a bad taste due to charring such as reheating of bread rolls and tempura, is cooked by the above-described structure, the secondary radiator is driven on the basis of the menu detection signal from the control means. The device moves the secondary radiator to a position where the radiation from the radiant heater to the object to be heated is not blocked, and the radiant heater having a wavelength distribution centered on near-infrared rays directly radiatively heats the inside of the food. In addition, when cooking to-be-heated objects such as toast and pizza, based on the menu detection signal from the control means,
The secondary radiator is moved by the secondary radiator driving device onto the radiation path from the radiant heater having a wavelength distribution centered on near infrared rays to the object to be heated. In this case, the radiant energy radiated from the radiant heater having a wavelength distribution centered on near infrared rays is absorbed by the secondary radiant body and the temperature of the secondary radiant body rises. Radiant energy is radiated to the object to be heated as the temperature of the secondary radiator rises, but the temperature of the secondary radiator becomes (heater temperature)> (temperature of the secondary radiator). Therefore, 2
The wavelength distribution radiated from the secondary radiator shifts to a longer wavelength as the temperature of the radiator drops due to the Wien's displacement law.
Infrared rays to far-infrared rays are radiated from the secondary radiator to a heated object such as food, and the radiant energy is almost absorbed up to about 0.5 mm from the surface of the heated object to cause charring. In this way, a single heater can radiate a wide variety of wavelength distributions, the charring can be controlled according to the food, and a good finish of the heated object can be realized.

Further, since the radiation area of the secondary radiator is larger than the radiation area of the radiation heater, the temperature of the secondary radiator can be easily set to infrared or far infrared temperature.

Since a plurality of secondary radiators are used,
By changing the number of secondary radiators used, the temperature of the secondary radiators, and hence the radiation wavelength distribution, can be changed.

By changing the distance between the radiant heater and the secondary radiant body, the amount of heat received from the radiant heater by the secondary radiant body can be changed. Therefore, the temperature of the secondary radiator changes and the radiation wavelength distribution can be changed.

Further, by combining at least two radiant heaters and a secondary radiant body, near infrared rays, infrared rays or far infrared rays, or far and near infrared rays can be used for cooking depending on the cooking menu. You can

Further, in the case of cooking an object to be heated which becomes uncomfortable due to burning, the coating radiation heater is controlled by the radiation heater driving device based on the signal of the menu detection from the control means so that The filament that radiates electromagnetic waves and the radiation path of the object to be heated are rotated and moved to a position where the infrared radiation film does not exist. At this time, since the near-infrared ray has a high transmittance, radiant energy having a wavelength distribution centered on the near-infrared ray is radiated to the object to be heated. In addition, when cooking to-be-heated objects such as toast and pizza, based on the menu detection signal from the control means,
The radiant heater driving device rotationally moves the coating radiant heater so that the infrared radiant film exists on the radiant path of the filament and the object to be heated that radiate the radiant energy having a wavelength distribution centered on near infrared rays. At this time, the radiant energy from the filament is absorbed by the infrared radiation film, the infrared radiation film having a small heat capacity instantly rises in temperature, and the infrared radiation film becomes a secondary radiation body, and radiation with wavelengths from infrared rays to far infrared rays is emitted. Energy is radiated to the object to be heated and charring occurs.

Furthermore, by combining at least two coating radiant heaters and two radiant bodies, it is possible to perform cooking with near infrared rays, infrared rays or far infrared rays, or far infrared rays in accordance with the cooking menu as described above. is there.

As described above, a single heater can radiate a wide variety of wavelength distributions, the charring can be controlled according to the food to be cooked, and a good finish of the heated object can be realized.
The radiant heater temperature rises quickly in the initial stage of heating, and it is possible to shorten the cooking time.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIGS. 1 and 2, 6 is
Reference numeral 3 denotes an oven for housing the article to be heated 7, and 3 denotes a radiant heater such as a halogen heater having a wavelength distribution centering on near infrared rays having a wavelength of about 1 μm for heating the article to be heated 7. Reference numeral 4 denotes a secondary radiator having an area larger than the radiation area of the radiation heater 3 and made of a ceramic thin plate or the like having a high emissivity in the infrared to far infrared region, and is based on a menu detection signal from the control means 2. The secondary radiator driving device 5
Is activated and moves between the radiant heater 3 and the object 7 to be heated with rotation as shown in FIG.

When the object to be heated 7 has an unpleasant taste due to charring such as reheating of bread rolls or tempura, as shown in FIG. 1, 2 is generated based on the signal of menu detection from the control means 2. The secondary radiation driving device 5 moves the secondary radiator 4 to a position where radiation from the radiation heater 3 to the object to be heated 7 is not blocked, and direct radiation heating is performed by the radiation heater 3 having a wavelength distribution centered on near infrared rays. To do. With radiant heating in the near infrared wavelength range around 1 μm, the depth of radiation penetration into food is about 20 mm, the food is heated to the inside, and the center of the heated object reaches the edible temperature range in a short time. Does not burn even when cooking with high power.

When cooking an object to be heated, such as toast or pizza, as shown in FIG. 2, the control means 2 is used.
The secondary radiator 4 is moved by the secondary radiator driving device 5 from the radiant heater 3 having a wavelength distribution centered on near infrared rays to the radiation path of the object to be heated 7 based on the menu detection signal from the. In this case, the radiant energy radiated from the radiant heater 3 having a wavelength distribution centered on near-infrared rays having a wavelength of about 1 μm is absorbed by the secondary radiator 4, and the secondary radiator 4 rises to 800 to 900 ° C. Warm. As the temperature of the secondary radiator 4 rises, radiant energy is radiated to the object to be heated 7, but since the radiation area of the secondary radiator 4 is larger than the area of the radiant heater 3 (radiant heater temperature)> ( The temperature distribution of the secondary radiation body) becomes, and the wavelength distribution radiated from the secondary radiation body 4 is
According to the Wien's displacement law, the wavelength shifts to a longer wavelength as the temperature of the radiator decreases. Therefore, from the secondary radiator 4 to the object to be heated 7 such as food, infrared rays having a wavelength with good absorption characteristics for food of about 3 μm are radiated, and the radiant energy is 0.5 mm from the surface of the object to be heated 7. Almost absorbed and burning occurs.

The secondary radiator driving device may move on the same plane instead of rotating.

With the above structure, one heater can radiate two kinds of wavelength distributions, near infrared rays having a wavelength of about 1 μm and infrared rays having a wavelength of about 3 μm. Burning can be controlled according to the food to be heated. A good finish can be achieved.

As described above, the feature of the present invention resides in that cooking is carried out in accordance with the radiation wavelength distribution which varies depending on the difference in temperature between the radiation heater and the secondary radiation body. Generally, the temperature of the radiant heater, which is the primary radiation, is higher than that of the secondary radiant body unless it is burnt. As a method of controlling the temperature difference between the two, there is a method of making the radiation area of the secondary radiation body larger than the radiation area of the primary radiation body as described above. There is also a method to change the radiant temperature. For example, the infrared radiation temperature is used when one sheet is used, and the far infrared radiation temperature is used when two sheets are used.

Further, by changing the distance between the radiant heater and the secondary radiant body, the heat receiving density (heat receiving amount per unit area) of the secondary radiant body is changed, so that the radiant temperature can be changed.

Further, by using a plurality of radiant heaters, it is possible to further cook according to the cooking menu. For example, when three radiant heaters are used and a secondary radiator corresponding to each radiant heater and its driving device are used,
When only the radiant heater is used, cooking is performed using near infrared rays, and when only the secondary radiator is used, cooking is performed using infrared rays or far infrared rays. Furthermore, the radiation of the radiation heater is used for both ends of the three radiation heaters,
A central radiator can be driven by a driving device to utilize the radiation from the secondary radiator, and at the same time, cooking can be performed with far-infrared rays.

(Embodiment 2) Another embodiment of the present invention is shown in FIG.
This will be described with reference to FIGS. 4 and 5.

As shown in FIG. 5, in the oven chamber 6 for storing the object to be heated 7 such as food as shown in FIG. 3 and FIG.
A quartz tube 9 coated with an infrared radiation film 8 such as borosiloxane having a thickness of several tens of μm formed on the outer surface, and a near infrared ray having a wavelength of about 1 μm provided inside the quartz tube 9. A coating radiant heater 3 for supplying radiant energy is provided in an oven chamber composed of a filament 10 for radiating radiant energy having a wavelength distribution centered on the. The radiation heater driving device 11 rotates in the circumferential direction based on the signal. When cooking an object to be heated which has a bad taste due to burning, the control means 2 is used as shown in FIG.
Radiant heater driving device 1 based on the menu detection signal from
1, the coating radiant heater 12 is rotationally moved to a position where the infrared radiation film 8 does not exist on the radiation path of the filament 10 and the object 7 to be heated which radiate radiant energy having a wavelength distribution centering on near infrared rays. Since quartz has a high near-infrared transmittance, radiant energy having a wavelength distribution centered on near-infrared rays is radiated to the object to be heated. Wavelength is 1 μm
With radiant heating in the near-infrared wavelength range, the depth of radiation penetration into the food is about 20 mm, and the food is heated to the inside.
The center of the object to be heated reaches the edible temperature range in a short time, and does not burn even if cooking is performed with high electric power. Further, when cooking an object 7 to be burned such as toast or pizza, as shown in FIG. 4, the radiant heater driving device 11 controls the coating radiant heater 12 on the basis of the menu detection signal from the control means 2. The filament 10 that radiates radiant energy having a wavelength distribution centered on near-infrared rays and the infrared radiation film 8 are rotatably moved so as to be present on the radiation path of the object 7 to be heated.
As a result, the radiant energy having a wavelength of about 1 μm that has passed through the quartz tube 9 is absorbed by the infrared radiation film 8. The infrared radiation film 8 having a small heat capacity instantly heats up to 800 to 900 ° C., and this infrared radiation film 8 serves as a secondary radiator to radiate infrared rays having a wavelength around 3 μm, which has good absorption characteristics for food. To do. This radiant energy is almost absorbed up to about 0.5 mm from the surface of the object to be heated 7 and is burnt.
With the above configuration, the wavelength distribution of the radiant heater can be converted,
Scoring can be controlled according to the food to be cooked, and a good finish of the heated object can be realized. Furthermore, the infrared radiation secondary film instantly radiates the infrared radiation secondarily by the configuration in which the outer surface of the quartz tube of the radiation heater is coated with the infrared radiation film, so that the cooking time can be shortened.

In this embodiment, the case where the quartz tube is used as the tube of the coating radiation heater has been described, but a glass tube or the like which transmits near infrared rays may be used.

When a plurality of coating radiant heaters are used, cooking using both far infrared rays and near infrared rays can be performed as in the case described in the first embodiment, and the cooking menu can be handled well.

[0035]

As described above, the heating cooker of the present invention has the following effects.

(1) Based on the menu detection signal of the control means, the secondary radiator driving device drives the secondary radiator having an area larger than the radiation area of the radiant heater to supply radiant energy to the oven. With a configuration that moves between a radiant heater with a wavelength distribution centered around and the object to be heated, it is possible to radiate many types of wavelength distribution with a single heater, and it is possible to control the charring according to the food and A good finish of the heated product can be achieved.

(2) Since the radiation area of the secondary radiator is larger than the radiation area of the radiation heater, the radiation energy can be easily converted.

(3) Since a plurality of radiators are provided,
The number of radiators can be selected according to the cooking menu, and the radiation can be performed according to the cooking menu.

(4) Since the distance between the radiant heater and the secondary radiant body can be changed, the radiant energy distribution from the secondary radiant body can be easily changed to one suitable for the cooking menu.

(5) Since a plurality of radiant heaters are used, the radiant heater can be used as a heater utilizing near infrared rays or used as a radiant source of a secondary radiant body in accordance with a cooking menu to generate a secondary radiant heater. Cooking can be performed by utilizing infrared rays or far infrared rays from the body, or by using one part as a radiation heater and the other as a radiation source heater to utilize both far and near infrared rays.

(6) Radiation energy is introduced into an oven chamber consisting of a quartz tube having at least half of its outer surface coated with an infrared radiation film and a filament provided inside which radiates radiant energy having a wavelength distribution centered on near infrared rays. The coating radiation heater to be supplied is rotated in the circumferential direction by the heater driving device based on the menu detection signal from the control means, so that a single heater can radiate a wide variety of wavelength distributions. The burn can be controlled according to the condition, and a good finish of the heated object can be realized.
The radiant heater temperature rises quickly in the initial stage of heating, and it is possible to shorten the cooking time.

[Brief description of drawings]

FIG. 1 is a front stereoscopic view of a heating cooker according to an embodiment of the present invention when heating near infrared rays.

FIG. 2 is a front three-dimensional view of the same cooking device during infrared heating.

FIG. 3 is a front three-dimensional view of a heating cooker according to another embodiment of the present invention when heating near infrared rays.

FIG. 4 is a front three-dimensional view of a cooking device according to another embodiment of the present invention during infrared heating.

FIG. 5 is a conceptual diagram of a radiation generating means according to an embodiment of the present invention.

[Explanation of symbols]

 2 control means 3 radiant heater 4 secondary radiant body 5 secondary radiant body drive device 6 oven chamber 7 object to be heated 8 infrared radiant film 9 tube 10 filament 11 radiant heater drive device 12 coating radiant heater

Claims (8)

[Claims] 1. An oven for accommodating an object to be heated, a radiant heater for heating the object to be heated, the radiant heater, and secondary radiation that is heated by the radiant heater to radiate the secondary object. The secondary radiant body to be heated, the secondary radiant body drive device for moving the secondary radiant body, and the control means for controlling the secondary radiant body drive device to adjust its position, the control means are provided. A heating cooker configured to move the secondary radiator between or outside the radiant heater and the object to be heated according to a cooking menu. 2. The cooking device according to claim 1, wherein the heating cooker comprises a radiant heater having a wavelength distribution centered on near infrared rays and a secondary radiator having a wavelength distribution centered on far infrared rays. 3. The cooking device according to claim 1, wherein the radiation area of the secondary radiator is larger than the radiation area of the radiation heater. 4. The heating cooker according to claim 1, wherein the heating cooker is composed of a plurality of secondary radiators in order to obtain radiation of various wavelength distributions. 5. The cooking device according to claim 1, wherein the distance between the radiant heater and the secondary radiator is variable. 6. An oven for containing an object to be heated, at least two radiant heaters for heating the object to be heated, and secondary radiation radiated by being heated by the radiant heater to heat the object to be heated. At least one secondary radiator, secondary radiation for moving the secondary radiator, and control means for controlling the secondary radiator driving device to adjust its position, wherein the control means 2 according to the menu
A heating cooker configured to move at least one of the secondary radiators between or outside the radiation heater and the object to be heated. 7. An oven for storing an object to be heated, a near-infrared transmitting tube whose outer surface is coated with an infrared radiation film, and a wavelength distribution centered on the near-infrared ray provided inside the tube. A coating radiant heater composed of a filament having a sphere, a radiant heater driving device for circumferentially rotating the coating radiant heater, and a control means for controlling the secondary radiator driving device to adjust the position of the infrared radiating film. A heating cooker configured such that the control means moves the infrared radiation film between the filament and an object to be heated or outside according to a cooking menu. 8. A coating radiation heater comprising at least two coating radiation heaters and at least one radiation heater driving device for driving the coating radiation heaters, wherein at least one of the secondary radiation bodies is coated according to a cooking menu. The heating cooker according to claim 7, wherein the heating cooker is configured to move between the filament and the object to be heated or outside.