JPH07101097B2 - Cooking device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a cooker provided with a gas sensor.

[Technical background of the invention]

Generally, some cookers, such as microwave ovens, are equipped with a gas sensor for detecting gas emitted from food and perform automatic cooking according to the output of the gas sensor.

Here, FIG. 3 shows an example of automatic cooking using a gas sensor.

That is, during reheating cooking to warm curry, potage, rice, etc., the output of the gas sensor is monitored, and when the output reaches the set value α, a constant β is added to the time To required until then.
And the value β · To is set as the subsequent heating time. Then, when the β · To time has elapsed, the cooking ends there.

[Problems of background technology]

However, the change in the output of the gas sensor is not necessarily as shown in FIG. 3, and differs depending on the type and amount of food. Therefore, the time until the output of the gas sensor reaches the set value α To
However, there was a problem in that "variation" occurred at the end timing of cooking, which adversely affects the quality of cooking.

[Object of the Invention] The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a highly reliable cooker that can always cook in good condition without being affected by the type and amount of food.

[Outline of Invention]

This invention is a gas sensor for detecting gas emitted from food, a weight sensor for detecting the weight of food, a means for setting a heating time for food according to the weight detected by the weight sensor, and a gas sensor for cooking. When the output reaches the set value, it is a cooking device comprising means for setting the subsequent heating output based on the time required until then.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a heating chamber, and a shelf plate 2 for placing food on the heating chamber 1 is provided in the heating chamber 1. The shelf 2 has a support shaft 2a, which penetrates the bottom surface of the heating chamber 1 and contacts the weight sensor 3. That is, the weight of the shelf 2 and the food is applied to the weight sensor 3. Then, the output of the weight sensor 3 is supplied to the control unit 20 via the weight sensor circuit 4.

On the other hand, a magnetron 5 which is a high frequency generator is attached to the upper side wall of the heating chamber 1, and an antenna 5a of this magnetron 5 is introduced into the heating chamber 1. Then, the magnetron 5 is connected to the commercial AC power source 8 via the high voltage transformer 6 and the control switch (relay contact) 7a.

Further, in the heating chamber 1, the exhaust port 9 is provided on the upper side wall on the opposite side.
And the gas sensor 10 is provided outside the exhaust port 9. Then, the output of the gas sensor 10 is fed to the gas sensor circuit 11
Is supplied to the control unit 20 via.

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

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

Food is placed on the shelf 2 in the heating chamber 1 and a door (not shown)
Close. Then, set reheat cooking with the operation unit 21,
And start cooking operation. Then, the control unit 20 operates the relay 7, takes in the weight of the food detected by the weight sensor 3, and sets the heating time Tk corresponding to the weight.

When the relay 7 operates, the control switch 7a turns on and the magnetron 5 oscillates. That is, high frequency radio waves are emitted from the magnetron 5, and the food on the shelf 2 is dielectrically heated with a predetermined output.

When cooking starts in this way, gas will eventually be released from the food. This gas passes through the exhaust port 9, hits the gas sensor 10, and is discharged to the outside. Then, 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, the following equation is calculated based on the elapsed time Ta (or Tb) until then, and the subsequent heating output is set.

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

When the type of food is group B (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 group A, a stronger heating output is set. If the type of food is the group B, a weaker heating output is set.

When the heating time Tk is represented by the above calculation result β,
It becomes like the following formula.

Tk = Ta + β · Ta = Ta · (1 + β) However, when the preset heating time Tk elapses, the control unit 20 stops the operation of the relay 7. When the operation of the relay 7 is stopped, the control switch 7a is turned off and the oscillation operation of the magnetron 5 is stopped. That is, cooking is completed.

In this way, the heating time Tk is set in advance according to the weight of the food, and when cooking, when the output of the gas sensor 10 reaches the set value α, the time Ta (or Tb) required until then is set based on the time Ta (or Tb). Since the heating output is set, it is possible to always perform good-quality cooking without being affected by the type and amount of food.

In the above embodiment, the setting of the heating output based on the calculation result β is made into two steps, strong and weak, but in reality, it is of course set in several steps according to the value of β. In addition, the present invention is not limited to the above embodiment,
Various modifications can be made without departing from the spirit of the invention.

〔The invention's effect〕

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

[Brief description 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 automatic cooking using the gas sensor in the conventional microwave oven. 1 ... Heating chamber, 3 ... Weight sensor, 10 ... Gas sensor,
20 ... Control unit.

Claims (1)

[Claims] 1. A gas sensor for detecting gas emitted from food, a weight sensor for detecting the weight of food, means for setting a heating time for food according to the weight detected by the weight sensor, and the gas sensor during cooking. And a means for setting the subsequent heating output based on the time required until that output reaches the set value.