JP2005052535A - Automatic cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic cooker in which unnecessary power consumption is prevented even if the amount of a cooking object matter is small by accurately making a judgment on the amount of the cooking object matter even if the heating capacity of a heater varies. <P>SOLUTION: A control device 10 for controlling the heating of a heater 3 upon receiving signals from a detecting part 9 for temperature inside a chamber has a storage device 10a for storing a cooking sequence and temperature raising time and a correction device 10b for correcting the detected temperature by the detecting part 9, and interrupts power supply to the heater 3 by making the judgment that the amount of the cooking object matter is small if the time required for raising the detected temperature by the detecting part 9 from the first prescribed temperature to a second prescribed temperature higher than a first prescribed temperature is shorter than the temperature raising time stored in the storage device 10a. Consequently, the automatic cooker curbs the influence caused by variation if the heating capacity of the heater varies, makes accurate the judgment on the weight of the object matter, and eliminates the unnecessary power consumption since the automatic cooker interrupts the power supply to the heater 3 when the amount of the cooking object matter is small. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic cooker such as an automatic bread maker used in general households.

2. Description of the Related Art Conventionally, for example, in an automatic bread maker, the duty of energizing a heater thereafter is stepwise according to the time until the detected temperature from the internal temperature detector reaches the second predetermined temperature from the first predetermined temperature. What changes and bake is known (for example, refer patent document 1).
JP-A-9-271446

  However, in the conventional configuration, the energization to the heater is changed by the inclination of the temperature detected by the internal temperature detection unit. However, depending on the variation of the heater wattage, the amount of the cooked food may not be accurately determined. In addition, even if it can be determined that the amount of the cooked food is small, the heater continues to be energized, which causes unnecessary power consumption.

  The present invention solves the above-described conventional problems, and enables accurate determination of the amount of food even if there is a variation in heater watts, and eliminates unnecessary power consumption when the amount of food is small. The purpose is to provide an automatic cooker.

  In order to achieve the object, the automatic cooker of the present invention includes a storage device that stores a cooking sequence and a temperature rise time, and a control device that controls the heating of the heater in response to a signal from the internal temperature detection unit. And a correction device capable of correcting the detection temperature of the internal temperature detection unit, wherein the detection temperature of the internal temperature detection unit is changed from the first predetermined temperature to the second predetermined temperature higher than the first predetermined temperature. When the time until the temperature reaches is shorter than the temperature rise time stored in the storage device, it is determined that the amount of food is small, and energization of the heater is stopped.

  As a result, even if there is a variation in heater watts, the correction device corrects the temperature detected by the internal temperature detection unit and suppresses the effects of the variation, so that the amount of cooked food can be accurately determined and the internal temperature detection The amount of cooked food is judged from the inclination of the detected temperature of the section and the inclination stored in the storage device. When the amount is small, energization to the heater is stopped, so unnecessary power consumption can be eliminated.

  The automatic cooker of the present invention suppresses the influence due to the variation of the heater watts and can accurately determine the amount of the cooked product. When the amount of the cooked product is small, the energization to the heater is stopped, which is unnecessary. Power consumption can be eliminated.

  1st invention is equipped with the baking chamber which has a heater, the internal temperature detection part which detects the temperature in the said baking chamber, and the control apparatus which receives the signal of the said internal temperature detection part, and controls the heating of a heater The control device includes a storage device that stores a cooking sequence and a temperature rise time, and a correction device that can correct the detected temperature of the internal temperature detection unit, and the detection of the internal temperature detection unit. If the time until the temperature reaches the second predetermined temperature higher than the first predetermined temperature from the first predetermined temperature is shorter than the temperature rise time stored in the storage device, it is determined that the amount of food is small. Thus, by using an automatic cooker that stops energization of the heater, even if there is a variation in heater watts, the detection temperature of the internal temperature detection unit is corrected by the correction device to suppress the influence of the variation And cooked Can be accurately determined, and the amount of cooked food is determined from the inclination of the temperature detected by the internal temperature detection unit and the inclination stored in the storage device. Therefore, unnecessary power consumption can be eliminated.

  In particular, the second invention is provided with a change device for changing the temperature rise time stored in the storage device of the first invention, thereby suppressing variations in heater watts that vary depending on the machine body by changing the temperature rise time, and cooking. The amount of objects can be judged more accurately.

  In the third aspect of the invention, in particular, by changing the temperature rise time stored in the storage device of the second aspect of the invention according to the cooking menu, the amount of cooked food in the baking chamber varies from menu to menu. Even in a menu with a small amount of food such as a cake menu, it is possible to stop energizing the heater when it is determined that the amount of food is small in accordance with the set menu without malfunction.

  In the fourth aspect of the invention, in particular, the temperature rise time stored in the storage device of the second aspect of the invention is changed in accordance with the process during cooking, so that the heater energization rate varies depending on the process during cooking. Thus, by setting the temperature rise time, when it is determined that the amount of cooked food is small, the power supply to the heater can be stopped.

  According to a fifth aspect of the invention, in particular, in the first or second aspect of the invention, the input unit for selecting the size of the food is provided, and the temperature rise time stored in the storage device is set according to the size set in the input unit. By changing, for example, depending on the amount of food set in the baking chamber depending on the size of the bread, the temperature rise time of the temperature detected by the internal temperature detection unit is adjusted to the amount of food set. By setting the rising time, when it is determined that the amount is small according to the amount of the set food, the energization to the heater can be stopped.

  In particular, the sixth invention is the first or second invention, further comprising a room temperature detection unit for detecting the room temperature, and changing the temperature rise time stored in the storage device according to the detection temperature of the room temperature detection unit. Considering the temperature rise time due to the influence of the room temperature, when it is determined that the amount of food in the baking chamber is small without being affected by the room temperature, the energization to the heater can be stopped.

  In a seventh aspect of the invention, in particular, in any one of the first to sixth aspects of the invention, a notification device that notifies the end of cooking or cooking abnormality is provided, and when the amount of cooked food is determined to be small, a notification is provided by the notification device. Thus, when it is determined that the amount of cooked food in the baking chamber is small, the user can quickly know that the set food is small by notifying by the notification device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 to 4 show an automatic cooker according to Embodiment 1 of the present invention.

  FIG. 1 shows an automatic bread maker as an example of an automatic cooker. A main body 1 of the cooker includes a baking chamber 2 for baking bread, a heater 3, and a baking pan in the baking chamber 2. 4. In addition, the motor 5 transmits power by the belt 6 and the pulley, and rotates the kneading blade 7 that is inside the baking mold 4 and rolls up the dough. In the baking chamber 2, the temperature control unit 9 for detecting the temperature in the baking chamber 2 by the thermistor 8 and the signal from the chamber temperature detection unit 9 are received to control the heating of the heater 3 and the drive control of the motor 5. And the like. The control device 10 includes a storage device 10a that stores a cooking sequence and a temperature increase time, a correction device 10b that can correct the temperature detected by the internal temperature detection unit 9, and a temperature increase that is stored in the storage device 10a. A change device 10c for changing the time is included. And the control apparatus 10 has memorize | stored in the said memory | storage device 10a the time until the detection temperature of the said internal temperature detection part 9 reaches 2nd predetermined temperature higher than 1st predetermined temperature from 1st predetermined temperature. When it is shorter than the temperature rise time, it is determined that the amount of food is small, and control is performed so as to stop energization of the heater 3. Moreover, the main body 1 of the cooking device is equipped with an input unit 11 for selecting a cooking menu, changing the bread size, and the like, and a display unit 12 for displaying the selected menu and the remaining cooking time.

  FIG. 2 shows a part of the control device 10, and the microcomputer 21 includes a storage device 10a that stores a cooking sequence and a temperature rise time. Ports P00 and P01 of the microcomputer 21 are provided. At the time of LOW output, the internal temperature is detected by inputting to the port AD0 of the microcomputer by the voltage dividing resistance of the resistors A and B and the thermistor 8. Further, when the resistance values of the resistor A and the resistor B are changed, the correction device 10b can change the internal temperature input value of the microcomputer 21. For example, when the thermistor 8 is 60 ° C. and the resistance value is 3 kΩ and the resistance value of the resistor A is also set to 3 kΩ, 127 bits are input to AD0 by outputting the port P00 of the microcomputer 21 LOW. Is done. In the microcomputer 21, the maximum read value of the port AD is 255 bits. When the thermistor 8 is 90 ° C., the resistance value is 1 kΩ, and when the resistance value of the resistor B is also set to 1 kΩ, 127 bits are input to AD0 by outputting the port P01 of the microcomputer 21 LOW. Is done.

  Further, the changing device 10c for changing the temperature rise time stored in the storage device 10a transmits the divided voltage of the resistor and the variable resistor to the port AD1 of the microcomputer 21, and the divided voltage of AD1. The temperature rise time is changed as shown in (Table 1).

  FIG. 3 shows the change over time of the thermistor 8 for detecting the temperature in the baking chamber 2 in the baking process of bread. As shown in the figure, the time until the temperature of the thermistor 8 rises from 60 ° C. to 90 ° C. is 240 s, and the small amount detection time is set to 240−30 = 210 s. This 30 s is a time in which room temperature, heaters, material variations, and the like are adjusted to some extent, and there is room for this time. However, when the machine has a large heater watt and the amount of food set in the baking mold 4 in the baking chamber 2 is small, the time required for the temperature detected by the thermistor 8 to rise from 60 ° C. to 90 ° C. is 220 s. It will be shorter. Therefore, there is a possibility that the food set in the baking mold 4 is erroneously determined as a small amount. Therefore, the airframe having a large heater watt changes the resistance value of the resistor A of the correction device 10b to, for example, 3.2 kΩ in advance. By doing so, the detection temperature of the thermistor 8 can be changed to 57 degreeC. Since the slope of the detected temperature of the thermistor 8 is almost a straight line from 60 ° C. to 90 ° C., the rising time is about 242 s by changing the detected temperature of the thermistor 8 from 57 ° C. to 90 ° C. A margin of 32 s can be taken for 210 s of the small amount detection time.

  Alternatively, by changing the variable resistor of the changing device 10c to a large resistance value so that the input value of the port AD1 of the microcomputer 21 is 31 bits or less, the small amount detection time is changed from 210s to 210-15 from (Table 1). = 195 s.

  Here, when it is determined that the amount is small, energization to the heater 3 can be stopped to suppress unnecessary power consumption.

  In addition, although the initial value of the temperature of the thermistor 8 is 60 ° C. and 90 ° C., this temperature is not limited.

  The small amount detection time is 210 s or 195 s, but this is also a time determined by the main body configuration, and is not limited to this value.

  In this manner, by correcting the detection temperature of the thermistor 8, a small amount can be detected in accordance with the machine body. Further, even when the heater watt is changed or the baking mold 4 is changed, the small amount detection can be adapted to the main body configuration with a simple change by simply changing the resistance value. Even if the change of the thermistor 8 over time is slightly changed between mass production and trial production, small amount detection can be appropriately performed with a simple change by simply changing the resistor. Even when the temperature detected by the thermistor 8 is input from only one port, a small amount of detection can be made to match the main body to some extent.

  FIG. 4 shows the change over time of the thermistor 8 that detects the temperature in the baking chamber 2 in the baking process of the bread and cake menu. When the menu is bread, the material in the baking mold 4 is 500 grams, but when the menu is cake, the material in the baking mold 4 is 400 grams. For this reason, as shown in the figure, the time until the temperature of the thermistor 8 rises from 60 ° C. to 90 ° C. is about 240 s in the bread menu, but is about 220 s in the cake menu. Yes. Therefore, setting a small amount detection time for each menu enables finer amount detection.

  Similarly, since the time-dependent change similarly changes depending on the size of the bread menu, the time until the thermistor 8 rises from 60 ° C. to 90 ° C. is about 260 s when the bread is L size. It is about 220 s for bread, and each small amount detection time is set to about 240 s for L size and about 200 s for S size.

  Also, depending on the bread bread sequence process, the time until the temperature of the thermistor 8 rises from 60 ° C. to 90 ° C. is about 235 s in the low temperature process due to the difference in the energization rate to the heater 3 during the baking process. However, in the high temperature process, it is about 225 s. For this reason, the small amount detection can be performed more finely by setting the small amount detection time for each cooking process.

  Note that the short detection time is 30s shorter than the actual change over time, but this time is adjusted to some extent such as room temperature, heater, and material variations, and is limited to this time. is not.

(Embodiment 2)
5 and 6 show an automatic cooker according to Embodiment 2 of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as shown in FIG. 5, a room temperature detection unit 14 that detects the room temperature by the second thermistor 13 is provided, and the cooking sequence suitable for the room temperature is detected by detecting the room temperature during cooking. It is controlled by the microcomputer 21 of the control device 10 so as to operate.

  FIG. 6 shows the change over time of the thermistor 8 for detecting the temperature in the baking chamber 2 in the baking process of bread. As shown in the figure, the time until the temperature of the thermistor 8 rises from 60 ° C. to 90 ° C. is about 255 s at 5 ° C. and about 230 s at 35 ° C. Here, when the room temperature is 5 ° C., the small amount detection time is set to 255-30 = 225 s, and when the room temperature is 35 ° C., 230-30 = 200 s is set.

  At the start of the baking process during cooking, depending on the temperature detected by the room temperature detector 14, for example, if it is 10 ° C. or less, the small amount detection time is set to 225 s, and the temperature of the thermistor 8 is from 60 ° C. to 90 ° C. When the time to increase is shorter than 225 s, it is possible to stop energizing the heater 3 and suppress unnecessary power consumption.

(Embodiment 3)
FIG. 7 shows an automatic cooker according to Embodiment 3 of the present invention. The same elements as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as shown in the figure, a notification device 15 such as a buzzer and a display means for notifying that the operation of the cooking sequence has ended at the end of cooking or the like is provided.

  Here, when the amount of food set in the baking mold 4 in the baking chamber 2 is small, the notification device 15 notifies the user that the food is not appropriate.

  In the first to third embodiments, the automatic bread maker has been described as an example of the automatic cooker. However, the present invention is not limited to the automatic bread maker.

  As described above, the automatic cooking device of the present invention can accurately determine the amount of the cooked product, and when the amount of the cooked product is small, it stops energizing the heater and eliminates unnecessary power consumption. Therefore, it can be applied to various cooking devices at home, for example, automatic bread machines, ovens, toasters, and the like.

Sectional drawing which shows schematic structure of the automatic cooker in Embodiment 1 of this invention. Electric circuit diagram showing a part of the control device in the automatic cooker Temperature characteristics diagram of baking process in the automatic cooker Temperature characteristics of bread menu and cake menu in the automatic cooker Sectional drawing which shows schematic structure of the automatic cooker in Embodiment 2 of this invention. Temperature characteristics diagram of baking process at room temperature 5 ℃ and 35 ℃ in the automatic cooker Sectional drawing which shows schematic structure of the automatic cooker in Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Baking chamber 3 Heater 9 Chamber temperature detection part 10 Control apparatus 10a Memory | storage device 10b Correction apparatus 10c Change apparatus 11 Input part 12 Display part 14 Room temperature detection part 15 Notification apparatus 21 Microcomputer

Claims (7)

A firing chamber having a heater; an in-chamber temperature detection unit that detects a temperature in the firing chamber; and a control device that controls heating of the heater in response to a signal from the in-chamber temperature detection unit, A storage device that stores a cooking sequence and a temperature rise time; and a correction device that can correct the temperature detected by the internal temperature detection unit. The temperature detected by the internal temperature detection unit is a first predetermined value. When the time until the temperature reaches a second predetermined temperature higher than the first predetermined temperature is shorter than the temperature rise time stored in the storage device, it is determined that the amount of food is small, An automatic cooker that stops energization. The automatic cooking device according to claim 1, further comprising a changing device that changes the temperature rise time stored in the storage device. The automatic cooker according to claim 2, wherein the temperature rise time stored in the storage device is changed according to the cooking menu. The automatic cooker according to claim 2, wherein the temperature rise time stored in the storage device is changed according to the process during cooking. The automatic cooker according to claim 1 or 2, further comprising an input unit for selecting a size of the food to be cooked, wherein the temperature rise time stored in the storage device is changed according to the size set by the input unit. The automatic cooking device according to claim 1, further comprising a room temperature detection unit that detects a room temperature, and changing a temperature rise time stored in a storage device according to a detection temperature of the room temperature detection unit. The automatic cooker of any one of Claims 1-6 provided with the alerting | reporting apparatus which notifies completion | finish of cooking or cooking abnormality, and alerting | reporting by the said alerting | reporting apparatus, when it is judged that the foodstuff is a small quantity.

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