JPS62155446A - Cooker - Google Patents

Abstract

PURPOSE:To be able to make satisfactorily finished cooking constantly regardless of the kinds and amount of foodstuff by installing a means for heating output in such a way that when the output of a gas sensor reaches a set value in cooking, subsequent heating output is set up based on the time required for said condition. CONSTITUTION:When a relay 7 is started to operate, a control switch 7a is turned on and a magnetron 5 is operated to make oscillation. That is, high frequency waves are emitted from the magnetron to carry out dielectric heating for foodstuff on a shelf plate 2 with a given output. Thus, after cooking is started, gas is liable to be released from the foodstuff. This gas passage through an exhaust hole 9 and is exhausted outside after collision with a gas sensor 10. A controller 20 monitors the output of the sensor 10 and therefore, when the output of the sensor 10 reaches a set value, it computes based on elapsed time Ta (or Tb) until that condition to set up subsequent heating output.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a cooking appliance equipped with a gas sensor.

(Technical Preface of the Invention) Generally, some cooking appliances, such as microwave ovens, are equipped with a gas sensor that detects gas emitted from food, and automatically cook food according to the output of this gas sensor.

Here, an example of automatic cooking using a gas sensor is shown in FIG.

That is, when reheating curry, potage, rice, etc., the output of the gas sensor is monitored, and when the output reaches the set value α, the time To required up to that point is multiplied by a constant β, and the value β is calculated. - Set TO as the subsequent heating time. Then, when β·10 hours have passed, the cooking ends there.

(Problems with the Background Art) However, changes in the output of the gas sensor are not necessarily as shown in FIG. 3, and vary depending on the type and amount of food. Therefore, the time T until the output of the gas sensor reaches the set value α
There is a problem that "o" varies, and this causes "variation" in the timing at which the cooking ends, which adversely affects the quality of the cooking.

(Object of the invention) This invention was made in view of the above circumstances.
The purpose is to provide a highly reliable cooking device that can cook food to a consistently good quality without being affected by the type of food or its appearance.

[Summary of Buwo Akira]

The present invention provides a gas sensor that detects gas emitted from food, a weight sensor that detects fireflies in food, means for setting a heating time for food according to the detected weight of the weight sensor, and a gas sensor that detects gas emitted from food. When the output reaches a set value, the heating output is set based on the time required up to that point.

(Embodiment of the Invention) An embodiment of the invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a heating chamber, and within this heating chamber 1 a shelf board 2 for placing food is provided. The shelf board 2 has a support shaft 2a, which passes through the bottom of the heating chamber 1 and comes into contact with the weight sensor 3. In other words, the weight of the shelf board 2 and the food is applied to the weight sensor 3. and,
The output of the weight sensor 3 is supplied to the control section 20 via the weight sensor circuit 4.

On the other hand, a magnetron 5 which is a high frequency generator 5A@ is attached to the upper side wall of the heating chamber 1, and the antenna 5a of this magnetron 5 is introduced into the heating chamber 1.

The magnetron 5 is then connected to a commercial AC power source 8 via a high voltage transformer 6, a control switch (relay contact) 7a, and the like.

In addition, in the heating chamber 1, an exhaust port 9 is provided at the top of the opposite side wall.
A gas sensor 10 is provided outside the exhaust port 9. The output of this gas sensor 10 is then supplied to the control section 20 via the gas sensor circuit 11.

The control section 20 is composed of a microcomputer and its peripheral circuits, and is externally connected to a relay 7, an operation section 21, a display section 22, and the like.

Next, the operation of the above configuration will be explained with reference to FIG.

Food is placed on the shelf board 2 in the heating chamber 1, and appetizers (not shown) are placed on the shelf board 2 in the heating chamber 1.
Close. Then, the operator sets reheating cooking using the operation unit 21 and performs a cooking start operation. Then, the control unit 20 operates the relay 7, captures the weight of the food detected by the ff1ffi sensor 3, and sets the heating time Tk corresponding to the weight.

When the relay 7 operates, the control switch 7a is turned on and the magnetron 5 operates in oscillation. In other words, magnetron 5
A high frequency radio wave is emitted from the shelf board 2, and the food on the shelf board 2 is dielectrically heated with a predetermined output.

Once cooking begins, gases will eventually emanate from the food. This gas passes through the exhaust port 9, hits the gas sensor 10, and is discharged to the outside.

Thus, the control unit 20 monitors the output of the gas sensor 10, and when the output of the gas sensor 10 reaches the set value α, it performs the calculation of the following formula based on the elapsed commercial amount Ta (or Tb), and thereafter Set the heating output.

When the type of food is A group (curry, potage, etc.), the calculation β=(Tk/Ta>−1) is performed, and the heating output of the βa zone shown in FIG. 2 is set based on the calculation result β.

If the type of food is B group (rice, etc.), β-(Tk /
Tb) -1 is calculated, and the heating output of the βb zone shown in FIG. 2 is set based on the calculation result β.

That is, if the type of food is A group, a stronger heating output is set. Furthermore, if the type of food is B, a weak heating output is set.

In addition, when the heating time Tk is expressed by the above calculation result β, it becomes as shown in the following formula.

Tk - Ta + β · Ta = Ta, - (1 + β) Therefore, the preset heating time Tk is I! If the controller 2
0 stops relay 1 from operating. When the operation of the relay 7 is stopped, the control switch 7a is turned off, and the generating operation of the magnetron 5 is stopped. In other words, cooking is finished.

In this way, the heating time Tk is set in advance according to the weight of the food, and the output of the gas sensor 10 is adjusted to the set value α during cooking.
When the time Ta (or Tb
) The subsequent heating output is set based on the following, so it is possible to always cook to a good quality without being affected by the type of food or the taste of the food.

In the above embodiment, the heating output is set in two stages, strong and weak, based on the calculation result β, but it goes without saying that it is actually set in multiple stages depending on the value of β. In addition, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without changing the gist.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a highly reliable cooking device that can always cook food to a good quality without being affected by the type or amount of food.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention;
FIG. 2 is a diagram showing changes in the output of the gas sensor in the same embodiment, and FIG. 3 is a diagram for explaining an example of self-WJ cooking using a gas sensor in a conventional microwave oven. DESCRIPTION OF SYMBOLS 1... Heating chamber, 3... Weight sensor, 10... Gas sensor, 20... Control part. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Time □ Figure 2 Time □ Figure 3

Claims (1)

[Claims] a gas sensor for detecting gas emitted from the food; a weight sensor for detecting the weight of the food; a means for setting a heating time for the food according to the weight detected by the weight sensor; 1. A cooking appliance characterized by comprising means for setting subsequent heating output based on the time required up to that point.