JPH05280745A - Heat cooking device - Google Patents

Abstract

PURPOSE:To prevent foods from being affected by its surrounding temp. when the foods to be cooked are classified according to the amount of alcohol contained therein by a method wherein the longer the identifying time of a control device is set, when the lower the surrounding temp. detected by a temp. sensor is. CONSTITUTION:A control device 20, upon receiving an instruction of automatic cooking, reads room temperature t0 by a temp. sensor 19 and obtains the identifying time T (j) by computation based on the room temp. t0, i.e., from the operation expression T (j)=67-1.4 t0 in the variables of room temp. t0. This operation expression is so formulated as to lengthen the identifying time with decreasing room temp. t0 and established based on the results from a number of tests. This permits the identifying time to be likewise lengthened, even when the amount of the alcohol escaping from the pizza containing a large amount of the alcohol decreases with decreasing room temp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and cooking apparatus for performing heating and cooking based on the amount of alcohol released from a food item.

[0002]

2. Description of the Related Art Conventionally, for example, in a microwave oven with a cooking function, a desired cooking item can be selected by operating an operation key provided on an operation panel,
Alternatively, the manual keys are used to set cooking conditions such as the temperature inside the refrigerator and the cooking time.

By the way, in recent years, microwave ovens having an automatic cooking function for discriminating the type of an object to be cooked and performing heating according to the type have been provided. That is, the weight sensor,
Various kinds of sensors such as an optical sensor and a gas sensor are provided, the type of the cooking object is judged based on the detection states of these sensors, and the cooking is automatically executed based on the judgment result.

When the food to be cooked contains alcohol when performing automatic cooking as described above, the heating conditions for the food to be cooked differ depending on the content of the food. Therefore, the content of alcohol is large. It is necessary to classify the cooking target and the small cooking target.

Therefore, an alcohol sensor is arranged in the exhaust duct in the oven, and the voltage signal ratio from the alcohol sensor (the voltage signal ratio at the start of cooking) is, for example, 30 seconds after the cooking is started. Based on whether or not it exceeds 1.2, the food to be cooked with a high alcohol content and the food to be cooked with a low alcohol content are classified. In other words, the cooked food with a high alcohol content emits alcohol immediately by heating, whereas the cooked food with a low alcohol content has a small alcohol release even if heating progresses. By appropriately setting the predetermined determination time and the predetermined determination value as described above, the food to be cooked can be classified according to the content of alcohol. In this case, the predetermined determination time and the predetermined determination value are set to values that can reliably classify the food to be cooked in a short time from the start of heating under standard heating conditions.

[0006]

By the way, when the room temperature is lowered, the amount of alcohol released tends to be lower than that at the normal temperature even in the case of a food having a large alcohol content. However, in the above-mentioned conventional example, the determination time and the determination value, which are the determination conditions for determining the alcohol content, are constant, so that when the room temperature becomes low, the alcohol content is large. Although it is a food, it is erroneously determined as a food to be cooked with a low alcohol content, and the subsequent heating and cooking is performed as a food to be cooked with a low alcohol content.

On the other hand, when the room temperature is high, the amount of alcohol emitted from the food having a low alcohol content is higher than that at the normal temperature, so that the voltage signal ratio of the alcohol sensor at the predetermined determination time is predetermined. May be exceeded, and in this case, it is erroneously determined that the object to be cooked has a low alcohol content but the alcohol content is high.

The present invention has been made in view of the above circumstances, and an object thereof is to perform heating and cooking based on the content of alcohol contained in an object to be cooked, without being influenced by ambient temperature. It is an object of the present invention to provide a heating and cooking device that can reliably perform heating and cooking.

[0009]

According to the present invention, there is provided an alcohol sensor for detecting the amount of alcohol diverged from an object to be cooked and outputting a voltage signal according to the detected amount, and after a lapse of a predetermined discrimination time from the start of cooking. A heating and cooking device including a control device that performs subsequent heating and cooking depending on whether or not the voltage signal ratio from the alcohol sensor exceeds a predetermined determination value, a temperature sensor that detects an ambient temperature is provided, and The control device is configured to set the determination time longer as the temperature detected by the temperature sensor is lower.

Further, the control device may be configured such that the higher the temperature detected by the temperature sensor, the higher the determination value is set.

[0011]

When the cooking is started, alcohol is released from the object to be cooked, so that the alcohol sensor outputs a voltage signal corresponding to the amount of alcohol. At this time, when the ambient temperature is low, even if the cooked food has a large alcohol content, the amount of alcohol released by heating is small, and when the ambient temperature is high, the cooked food with a low alcohol content is low. Even cooked foods tend to release more alcohol.

According to the cooking apparatus of the first aspect, the control device detects the ambient temperature by the temperature sensor,
When the ambient temperature is low, the discrimination time is set long. As a result, even if the amount of alcohol emitted from the food item having a high alcohol content is small due to the low ambient temperature, the voltage from the alcohol sensor is not supplied during the determination time from the start of cooking. The signal ratio exceeds the discriminant value. Therefore, the control device can classify the food to be cooked into a group containing a large amount of alcohol and a group containing a small amount of alcohol, and can reliably perform the subsequent cooking.

According to the second aspect of the present invention, the controller sets the discriminant value high when the ambient temperature detected by the temperature sensor is high. As a result, even if the amount of alcohol emitted from the food with a low alcohol content is large due to the high ambient temperature, the alcohol sensor outputs The voltage signal ratio never exceeds the discrimination value. Therefore,
The control device can classify the food to be cooked into a group containing a large amount of alcohol and a group containing a small amount of alcohol, and can reliably perform subsequent cooking.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a microwave oven will be described below with reference to FIGS. FIG. 2 shows a perspective view of the microwave oven. In FIG. 2, the main body 1
Is provided with an oven chamber 2 closed by a door 1a, and a shaft portion 3 projects from the bottom surface thereof. This shaft 3
Is rotated by a motor and a turntable (neither is shown) is mounted. A weight sensor 4 (see FIG. 1) is connected to the shaft portion 3 so as to detect the weight of the food to be cooked placed on the turntable. An operation panel 5 is provided on the front surface of the main body 1, and a display unit 6 and various switches 7 are provided on the operation panel 5.

FIG. 3 schematically shows a cross section of the body 1. In FIG. 3, a magnetron 9 and a cooling fan 10 are arranged in the machine room 8 of the main body 1. Also,
An electric heater 1 is provided on the rear side of the oven chamber 2.
1 and a blower fan 12 are provided.

An exhaust duct 13 connected to the inside of the oven chamber 2 is connected to the side surface of the oven chamber 2. The exhaust duct 13 is provided with a gas sensor 14 and an alcohol sensor 15, and a catalyst 16 and the same. An electric heater 17 for heating is provided.

A height sensor 18, which is an optical sensor for discriminating the food stored in the oven chamber 2, is provided on the side surface of the oven chamber 2. A temperature sensor 19 for detecting room temperature is arranged on the back surface of the main body 1.

In FIG. 1 showing a schematic electrical configuration,
The gas sensor 14 detects the amount of gas such as water vapor and outputs a voltage signal according to the amount of gas to the control device 20. The alcohol sensor 15 detects alcohol contained in the gas passing through the exhaust duct 13 and outputs a voltage signal according to the amount. Then, the control device 20 energizes the magnetron 9 or the electric heater 11 in accordance with the operation state of the various switches 7 to execute heating and cooking. Further, when the automatic cooking is instructed, the control device 20 is configured to execute the cooking based on the detection state of the temperature sensor 19 in addition to the various sensors.

Next, the operation of the above configuration will be described. FIG. 4 shows a flowchart of the operation of the control device 20. This flowchart shows the operation of the control device 20 when the automatic cooking is instructed, and other operations are omitted for simplification of description.

When the automatic cooking is instructed, the control device 20 reads the room temperature t0 by the temperature sensor 19 (step S1), and determines the discrimination time T based on the room temperature t0.
(J) is calculated (step S2). That is, the controller 20 sets T (j) = 67-1.4 with the room temperature t0 as a variable.
The discrimination time T (j) is calculated from the arithmetic expression t0. In this case, such an arithmetic expression is set such that the discrimination time becomes longer as the room temperature t0 is lower, and is determined based on various experimental results.

Subsequently, the controller 20 starts the internal timer (step S3) and energizes the electric heater 11 (step S4). Then, the control device 20
Signal level V0 of the voltage signal from the alcohol sensor 15
(Step S5), the internal timer counts the discrimination time T (j) obtained in step S2 (step S6), and the voltage signal V from the alcohol sensor 15 is input (step S7) to obtain V. It is determined whether / V0 is 1.2 or more which is the discriminant value (step S8).
).

By the way, in the case of cooking a pizza having a large alcohol content, for example, a large amount of alcohol is diverged from the pizza as the cooking progresses, so that as shown in FIG. The ratio with the voltage signal V0 at the start of cooking) gradually increases as the cooking progresses. Further, when the madeleine with a small alcohol content is cooked, alcohol is released from the madeleine as the cooking progresses as shown in FIG. .

Now, there is a circumstance that the amount of alcohol released from food by heating is affected by room temperature. That is, when the room temperature is high, the inside of the oven 2 receives heat from the surroundings. Therefore, when the cooking is started, a large amount of alcohol is immediately released from the food having a large alcohol content. On the other hand, when the room temperature is low, the amount of heat radiated from the oven chamber 2 increases, so even if the food contains a large amount of alcohol, the amount of alcohol released from the food as cooking progresses small.
Therefore, as shown in FIG. 5, in the case of a pizza having a large alcohol content, the amount of alcohol emitted with the progress of cooking greatly varies depending on the room temperature, while as shown in FIG. In the case of small madeleines, the amount of alcohol released with cooking does not change significantly regardless of room temperature.

Here, as described above, the controller 20
Determines the discrimination time T (j) based on the room temperature t0 in step S2. At this time, when an arbitrary room temperature t0 is input to the arithmetic expression to determine the discrimination time, T (j) is 60 seconds when the room temperature t0 is 5 ° C., and T (j) is T when the room temperature t0 is 25 ° C.
(J) is 32 seconds and T (j) is 18 when t0 is 35 ° C.
Seconds. That is, the controller 20 is set so that the determination time T (j) becomes longer as the room temperature becomes lower. As a result, even if the amount of alcohol released from the pizza having a higher alcohol content decreases as the room temperature decreases as shown in FIG. 7, the determination time is extended accordingly. In this case, the voltage signal ratio from the alcohol sensor 15 for detecting alcohol from the pizza exceeds 1.2 which is the discriminant value. As a result, the control device 20 classifies the pizza and the madeleine according to the content of alcohol based on whether V / V0 is 1.2 or more when the discrimination time T (j) has elapsed from the start of cooking. After that, the cooking is carried out based on that (steps S9 and S10).

According to the above configuration, the control device 20 is
Since it is configured to set the discrimination time longer as the room temperature is lower, unlike the conventional example in which food is classified at a certain discrimination time from the start of cooking regardless of the room temperature, even when the room temperature is low, Foods with a high alcohol content and foods with a low alcohol content can be reliably classified.

8 to 10 show a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that
It is only the operation of the control device 20. That is, in FIG. 8 showing the operation of the control device 20, when the automatic cooking is instructed, the control device 20 reads the room temperature t0 from the temperature sensor (step S1) and determines the discrimination value K based on the room temperature t0.
(Α) is calculated (step S2). That is, the controller 20 sets K (α) = 0.02t0 with the room temperature t0 as a variable.
The discriminant value K (α) is obtained from the arithmetic expression +1. In this case, such an arithmetic expression is set so that the discriminant value K (α) increases as the room temperature t0 increases, and is determined based on various experimental results.

Subsequently, the controller 20 starts the internal timer (step S3) and energizes the electric heater 11 (step S4). Then, the control device 20
Signal level V0 of the voltage signal from the alcohol sensor 15
Is stored (step S5), and the internal timer is set to 60.
When the seconds have been counted (step S6), the voltage signal V from the alcohol sensor 15 is input (step S6).
7), it is determined whether V / V0 is equal to or greater than the discriminant value K (α) (step S8).

FIG. 9 shows the amount of alcohol released from foods with a large alcohol content, such as baked pork.
As shown in, when the room temperature is high, the temperature increases immediately after the start of cooking.

Here, the controller 20 determines the discriminant value K (α) based on the room temperature t0 in step S2. At this time, when the discriminant value K (α) is calculated by inputting an arbitrary room temperature t0 into the arithmetic expression, the discriminant value K (α) is 1.1 when the room temperature t0 is 5 ° C. and the discriminant value K (α) is 25 when the t0 is 25 ° C. K (α) is 1.5, and when t0 is 35 ° C., K (α) is 1.7. That is, the control device 20 is set to increase the determination value K (α) as the room temperature increases. As a result, as shown in FIG. 10, even when the amount of alcohol emitted from the madeleine with a smaller amount of alcohol increases as the room temperature increases, the determination value increases accordingly, so the predetermined determination time Moreover, the voltage signal ratio from the alcohol sensor 15 for detecting alcohol from Madeleine never exceeds the determination value K (α). As a result, the control device 20 determines that V / V0 is K after 60 seconds have elapsed from the start of cooking.
Based on whether or not (α) or more, the baked pork and the madeleine are classified according to the content of alcohol, and thereafter, the cooking is performed based on that.

According to the above configuration, the control device 20
Is configured so that the higher the room temperature is, the higher the discriminant value is.Therefore, unlike the conventional example in which foods are classified with a constant discrimination time regardless of the room temperature, even if the room temperature is high, the alcohol content It is possible to reliably classify a large amount of food and a small amount of food.

[0031]

As is apparent from the above description, the heating and cooking device of the present invention has the following effects.

According to the cooking apparatus of the first aspect, the temperature sensor for detecting the ambient temperature is provided, and the control device is configured to set the determination time longer as the temperature detected by the temperature sensor is lower. In the heating cooking apparatus that performs heating based on the content of alcohol contained in the object to be cooked, the heating can be reliably performed without being affected by the ambient temperature.

According to the second aspect of the present invention, the control device is configured to set the discriminant value higher as the temperature detected by the temperature sensor is higher. Similarly, in the heating cooking device that performs heating based on the content of alcohol contained in the object to be cooked, heating can be reliably performed without being affected by the ambient temperature.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an electrical configuration showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a microwave oven.

FIG. 3 is a cross-sectional view of a microwave oven.

FIG. 4 is a flowchart showing the operation of the control device.

FIG. 5 is a characteristic diagram showing changes in the voltage signal ratio from the alcohol sensor during pizza cooking.

FIG. 6 is a view corresponding to FIG. 5 when the madeleine is cooked.

FIG. 7 is a diagram corresponding to FIG. 5 when cooking different foods.

FIG. 8 is a flowchart showing the operation of the control device in the second embodiment of the present invention.

FIG. 9 is a characteristic diagram showing changes in the voltage signal ratio from the alcohol sensor during cooking of baked pork.

FIG. 10 is a diagram corresponding to FIG. 9 when cooking different foods.

[Explanation of symbols]

1 is a main body, 2 is an oven chamber, 9 is a magnetron, 11
Is an electric heater, 15 is an alcohol sensor, 19 is a temperature sensor, and 20 is a controller.

Claims (2)

[Claims] 1. An alcohol sensor for detecting the amount of alcohol emitted from an object to be cooked and outputting a voltage signal according to the detected amount, and a voltage signal ratio from the alcohol sensor after a lapse of a predetermined discrimination time from the start of heating and cooking. In a heating cooking device having a control device for performing subsequent heating cooking depending on whether or not exceeds a predetermined discriminant value, a temperature sensor for detecting an ambient temperature is provided, and the control device uses the temperature sensor. The cooking device is characterized in that the determination time is set longer as the detected temperature is lower. 2. An alcohol sensor for detecting the amount of alcohol released from an object to be cooked and outputting a voltage signal according to the detected amount, and a voltage signal ratio from the alcohol sensor after a lapse of a predetermined discrimination time from the start of cooking. In a heating cooking device having a control device for performing subsequent heating and cooking depending on whether or not exceeds a predetermined discriminant value, a temperature sensor for detecting an ambient temperature is provided, and the control device uses the temperature sensor. A heating and cooking device characterized in that the higher the detected temperature, the higher the discrimination value is set.