JP2734575B2 - Steam cooker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam cooker provided with display means and used at home or the like.

2. Description of the Related Art In a conventional steaming cooker, a control means is adopted such that when steaming water is exhausted, even if the steaming time is shorter than the steaming time initially set, the process proceeds to a heat retaining step.

Problems to be Solved by the Invention With such conventional control means, even if the user sets an accurate steaming time for cooking, if the amount of steaming water is incorrect, the process proceeds to the heat retention step. Nevertheless, since the steaming time required for cooking is insufficient, the cooking state is not good. At this time, there is a problem that it is difficult for the user to understand why the user has not cooked well. The present invention solves such a problem, the steaming water is small, a predetermined steaming time, when cooking could not be displayed, this is displayed, and the user was able to understand why the cooking was not successful, An object of the present invention is to provide a steam cooker capable of prompting an additional steaming time.

Means for Solving the Problems The present invention comprises a pot for putting cooked food and steaming water, heating means for heating the pot, and steaming time setting means for setting a time for steaming the cooked food, wherein the heating means After the start of heating, when it is detected that the pot has run out of steam in the pot at a point in time after the time when steam is generated in the pot is shorter than the time set by the steaming time setting means, the steaming time is set. Is displayed to indicate that the steaming time is insufficient, and if necessary, the process proceeds to the heat retaining step while indicating that the steaming time is insufficient.

Effect of the Invention In the above-described configuration, even if the user mistakes the amount of steaming water in the above-described configuration, a pot for putting cooking food and steaming water, a heating unit for heating the pan, and a time for steaming the cooking food are reduced. Steaming time setting means for setting, after the start of heating by the heating means, at a time point when the time from when steam is generated in the pot is shorter than the time set by the steaming time setting means, When it is detected that the steaming water has run out, it indicates that the steaming time is insufficient, and, if necessary, indicates that the steaming time is insufficient. In this case, the user can understand the reason why the cooking was not successfully performed, and it is possible to add the steaming water and to perform the steaming process again.

Embodiment FIG. 1 is a block diagram showing an embodiment of a steam cooker according to the present invention. In the figure, 1 is a pot for cooking and steaming water,
2 is a heating means for heating the pot 1, 3 is a steam detecting means for detecting the generation of steam, 4 is a steaming time setting means for setting a time for steaming the food after steam starts to be emitted, and 5 is presence or absence of steaming water. A steaming water detecting means 6 for detecting the temperature, a driving means for driving the heating means 2, and integrating the time from when the steam is detected by the steam detecting means 3, and the integrated time is the time set by the steaming time setting means 4. If it is shorter and there is no steaming water by the steaming water detecting means 5, the steaming time shortage display means 7 for displaying that the steaming time is short is driven, and the process proceeds to the next heat retaining step. As a result, the user can understand why the cooking was not successfully performed, and can prompt the addition of the steaming time.

FIG. 2 is a circuit diagram of a steam cooker according to an embodiment of the present invention.

Reference numeral 10 denotes a microcomputer including an input unit 10a, an output unit 10b, a control unit 10c, a storage unit 10d, and a calculation unit 10e. 11 is a heater for heating the pot. 12 is a resistor, 13 is a resistor, 14 is a transistor, 15a is a relay coil, and 15b is a relay contact. One end of the resistor 12 is connected to the output unit 10b. 16 is a resistor, 17 is a light emitting diode, and one end of the resistor 16 is connected to the output unit 10b. Reference numeral 18 denotes a switch, and 19 denotes a resistor.
Is giving a signal. Reference numeral 20 denotes a comparator to which a reference voltage determined by the resistors 21 and 22 is input. Further, a voltage corresponding to the pot temperature determined by the thermistor 23 having a negative characteristic for detecting the temperature of the pot and the resistor 24 is input to the terminal of the comparator 20. Reference numeral 25 denotes a pull-up resistor connected to the borrower of the comparator 20, and the output of the comparator 20 is connected to the input unit 10a. Reference numeral 26 denotes a comparator.
The reference voltage determined at 28 is input. A voltage corresponding to the temperature of the lid determined by the thermistor 29 having a negative characteristic for detecting the temperature of the lid of the steamer and the resistor 30 is input to the terminal of the comparator 26. Reference numeral 31 denotes a pull-up resistor connected to the output of the comparator 26, and the output of the comparator 26 is connected to the input unit 10a. Three
2 is a DC power supply and 33 is an AC power supply.

FIG. 3 shows a flowchart of one embodiment of the steam cooking device of the present invention.

The operation of the circuit will be described based on the flowchart.

In step 50, the user presses the switch 18 to give a high level to the input unit 10a. The control unit 10c stores the steaming time T proportional to the time during which the switch 18 is pressed in the storage unit 10d. In step 51, the output unit 10 connected to the resistor 12
b is set to the low level by the control unit 10c, the transistor 14 is turned on, the relay coil 15a is excited, the relay contact 15c is turned on, the heater 11 is energized, and the pan is heated with full power. In step 52, it is determined whether or not the steam in the pot is heated and turned into steam. When steam is generated, the temperature of the lid of the cooker becomes higher than a certain temperature t1 ° C, and when no steam is generated by detecting the temperature of the lid, thermistor 29 is turned on. Since the temperature is low, the resistance is high and the voltage at the terminal of the comparator 26 is lower than the reference voltage input to the terminal, so that the output of the comparator 26 is at a high level. At this time, the process returns to step 51. next,
When steam starts to be generated, the temperature の of the lid rises and the temperature of the thermistor 29 becomes higher than t1 ° C., so that the resistance value decreases and the voltage of the terminal of the comparator 26 becomes higher than the reference voltage input to the terminal. Therefore, the output of the comparator 26 becomes low level and is input to the input unit 10a. As a result, it is detected that steam has been generated, and the process proceeds to step 53, where the control unit 10c starts to accumulate the time by the arithmetic unit 10e based on the signal of the input unit 10a. In step 54, the steam starts to flow, enters the steaming process, and the output section 10 connected to the resistor 12
b indicates a low level for 5 seconds and a high level for 11 seconds, and the heater 11 is energized for 5 seconds during 16 seconds to reduce the amount of input power so as to steam the food slowly. Then step 55
Proceed to. In step 55, the steaming time T set by the user in step 50 is compared with the accumulated time since the start of steam generation. That is, the steaming time T stored in the storage unit 10d and the time accumulated by the calculation unit 10e are stored in the control unit 1
Compare with c. When the calculation time is equal to or longer than the set steaming time T, the process proceeds to the heat retaining step. vice versa,
When the accumulated time is shorter than the set steaming time T, the process proceeds to step 56. In step 56, it is determined whether or not there is steaming water. If there is no steam,
Since the temperature becomes higher than a certain temperature t2 ° C., the presence or absence of the steam is determined by detecting the temperature of the pot pressure. That is, when steaming water is present, the temperature of the linear pressure is lower than t2 ° C., the temperature of the thermistor 23 is low, the resistance is high, and the comparator 20
Is lower than the reference voltage input to the terminal, the output of the comparator 20 becomes high level and is input to the input unit 10a. Upon receiving this signal, the control unit 10c proceeds to step 54. Conversely, when the steam has run out, that is, when the temperature φ at the bottom of the pan has become higher than t2 ° C., the thermistor 23
Becomes high, the resistance becomes low, the voltage of the terminal of the comparator 20 becomes higher than the reference voltage input to the terminal, the output of the comparator 20 becomes low level, and the
Entered in 10a. If there is no steam in step 56, the process proceeds to step 57, where the control unit 10c sets the output unit 10b connected to the resistor 16 to low level, turns on the light-emitting diode 17, and runs out of steam. It indicates that the steaming time is insufficient for the steaming time T. That is, lighting of the light emitting diode 17 indicates insufficient steaming time. Also, here, the difference between the set steaming time and the accumulated time, that is, the time during which the steaming time is insufficient may be displayed on an LCD or the like. You just need to understand that After displaying the steaming time shortage in step 57,
Proceed to the next heat retention step. As described above, according to the present invention, it is possible to display that the user cannot cook at the steaming time set by the user due to the lack of steaming water, and that the steaming time is insufficient. It is possible to have them understand that the steaming process has not been performed, and to prompt the user to add steaming water and repeat the steaming process.

Effect of the Invention According to the configuration of the present invention, even if the user makes a mistake in the amount of steaming water, a pot for putting cooking food and steaming water, heating means for heating the pan, and a time for steaming the cooking food Steaming time setting means for setting the heating means, after the start of heating by the heating means, at a point in time after the time when steam is generated in the pot is shorter than the time set by the steaming time setting means in the pot When it is detected that the steaming water has run out, it indicates that the steaming time is insufficient, and if necessary, keeps warm while indicating that the steaming time is insufficient. By shifting to the process, the user
This has the effect of prompting you to understand why you did not cook well.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a steam cooker of the present invention,
FIG. 2 is a circuit diagram of one embodiment for implementing the block diagram of FIG. 1 of the steam cooker of the present invention, and FIG. 3 is a flowchart for operating the block diagram of one embodiment of the steam cooker of the present invention. 10: microcomputer, 10a: input section, 10b: output section, 1
0c: control unit, 10d: storage unit, 10e: calculation unit, 11: heater, 12,
13, 16, 17, 19, 21, 22, 24, 27, 28, 30: resistor, 14: transistor, 15a: relay coil, 15b: relay contact, 1
7: Light emitting diode, 18: Switch, 20, 26: Comparator, 23, 29: Negative thermistor, 32: DC power supply, 33: AC power supply

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuhiko Tanaka 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-55-76621 (JP, A) Microfilm (JP, U) which photographs the contents of the specification and drawings attached to the application for 35694 (Japanese Utility Model Application Laid-Open No. 63-143248)

Claims (2)

(57) [Claims] 1. A pot for putting food and steaming water, heating means for heating the pot, and steaming time setting means for setting a time for steaming the food, wherein after the heating by the heating means starts heating, When it is detected that the pot has run out of steam in the pot at a time shorter than the time set by the steaming time setting means from the time when steam is generated in the pot, the steaming time is insufficient. A steam cooker that displays that. 2. After the start of heating by the heating means, it is detected that steam in the pot has run out at a point in time after the time when steam is generated in the pot is shorter than the time set by the steaming time setting means. 2. The steaming cooker according to claim 1, wherein when the steaming time is short, the process shifts to a warming step while indicating that the steaming time is insufficient.