JP2010199008A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker having an automatic steaming course for actualizing fail-proof cooking even when no food material or no water is charged or put in error before boiling. <P>SOLUTION: The amount of charged water is estimated. When integral power found by an integral power operating means reaches required predetermined power before the estimated amount of water is boiled away, an informing means informs a user to charge water, thus preventing the steaming operation of an empty steamer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an induction heating cooking device that enables automatic cooking by a steamer.

Conventionally, this type of induction heating cooking device only detects the temperature of the pan bottom and informs that the water in the pan has boiled, and has not been used for steaming cooking (see, for example, Patent Document 1). . Further, when the temperature at the bottom of the pot suddenly becomes high, control is performed to detect emptying and stop input, but no notification is made before emptying (for example, Patent Document 2). reference).
JP-A-8-24120 JP 2004-141500 A

  However, in the above-mentioned conventional configuration, it is not only detected that boiling or empty boiling is detected, but it is not detected when the water runs out. Therefore, when applied to steaming, the lid is opened each time to check the amount of remaining hot water. It was necessary to confirm. In addition, since the amount of water is not visible at the lid of the steamer, it is difficult to control the heat, and as described above, the user does not know when to add water, which has the problem of leading to steaming failure.

  The present invention solves the above-described conventional problems, and in steam cooking, the problem that a user is likely to fail when performing steam cooking, that is, fails to input food before boiling or forget to add water. An object of the present invention is to provide an induction heating cooking device having an automatic steaming course capable of cooking without any problems.

  In order to solve the above-mentioned conventional problems, the induction heating cooking appliance of the present invention supplies a predetermined power to the induction heating coil by the control means, detects the temperature of the bottom of the steamer by the temperature detection means, measures the temperature gradient, The larger the temperature gradient, the smaller the amount of water charged into the steamer, and the smaller the temperature gradient, the larger the amount of water charged into the steamer, so as to estimate the amount of water charged and obtained by the integrated power calculation means. When the integrated power reaches a predetermined power required until the estimated amount of water is not evaporated, the notification means notifies the user to add water.

  As a result, the user can see that the water in the steamer has decreased without opening the lid of the steamer, and can prevent the steamer from being aired.

  The induction heating cooking appliance of the present invention can cook steam cooking without failure by controlling the water temperature in the steamer.

A first invention is a steamer having a lid, a top plate on which the steamer is placed, an operation unit for performing an operation for selecting an automatic cooking course including a steaming course, an induction heating coil for heating the steamer, and the induction Control means for controlling the output to the heating coil, temperature detecting means for detecting the temperature of the steamer, notification means for notifying by voice or display, and integrated power calculating means for calculating the integrated output from the start of heating And when the steaming course is selected by the operation unit, the control means supplies a predetermined electric power to the induction heating coil, measures a temperature gradient from the temperature detected by the temperature detection means, and increases the temperature gradient. The amount of water charged into the steamer is estimated to be small, and the accumulated power obtained by the accumulated power calculation means is less than the estimated amount of water evaporated. Upon reaching the main a predetermined power, the notification means, by notifying to introduce water, it is found boiled timing and amount of water put into the steamer. In addition, the correlation between the amount of vapor evaporated from the covered steamer and released to the outside and the heating can be confirmed in advance by experiments. Therefore, it is possible to estimate the accumulated power amount from the amount of water vapor and the amount of water until the water runs out by calculation. If it is detected by the integrated power calculation means that the measured integrated power from the start of heating reaches the predetermined integrated power, the time when there is no water can be estimated. Therefore, it can be seen that the water in the steamer has decreased without opening the lid of the steamer, and the steaming of the steamer can be prevented. In addition, when it is detected from the temperature detected by the temperature detection means that the water in the steamer has boiled, the notification means notifies that, and then the temperature of the temperature detection means is detected to induce induction overheating. By maintaining the boiling while reducing the electric power provided to the coil, it is notified that it has boiled, the optimum charging time of the food is known, and the boiling is continued thereafter, so cooking can be continued.

  In particular, when the notification means notifies the induction heating cooking appliance according to the first invention, and the temperature detection means detects a temperature drop, the second invention considers that water has been added to the steamer, and the control means Increases the power supplied to the induction heating coil, detects that the water in the steamer has reached boiling from the temperature detected by the temperature detection means, and operates by heating to maintain boiling Steaming cooking can be continued without any problems.

  In the third aspect of the invention, in particular, even when the notification means notifies the induction cooking device of the first or second aspect of the invention, when the temperature detection means detects a gradual temperature drop, hot water is added to the steamer. The control means can continue steam cooking by continuing the power supplied to the induction heating coil and maintaining boiling.

  In the fourth aspect of the invention, in particular, when the notification means informs the induction cooking device according to any one of the first to third aspects of the invention, when the temperature detection means detects that the boiling has continued for a certain time or longer, the steamer It can be assumed that no water or hot water has been added, and the notification means can give a warning of emptying by notifying with a warning sound to stop the input after a while.

  In the fifth aspect of the invention, in particular, when the notification means notifies the induction cooking device according to any one of the first to fourth aspects of the invention, when the temperature detection means detects that the boiling has continued for a certain time or longer, the steamer It is assumed that water or hot water has not been added to the kitchen, and the control means can increase the time until empty cooking by lowering the input, and can also extend cooking.

  In the sixth aspect of the invention, in particular, after the notification means informs the induction cooking device according to any one of the first to fifth aspects of the invention, the temperature detection means rapidly raises the temperature of the steamer bottom to 100 ° C. or higher. When it is detected that the water has risen, it is considered that the water in the steamer has completely disappeared, and by stopping the output, it is possible to prevent empty baking when water and hot water are forgotten.

  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)
FIG. 1 shows a characteristic diagram of the induction heating cooking appliance according to the first embodiment of the present invention.

In FIG. 1, a steamer 1 having a lid is installed on a top plate 2, and when an automatic cooking course including a steaming course is selected by the operation unit 3, predetermined power is supplied to the induction heating coil 4 by the control means 5. Supplied. The temperature detection means 6 detects the bottom temperature of the steamer 1, and the control means 5 controls the electric power.

  FIG. 2 shows a graph of detected temperature T and input in the first embodiment of the present invention.

  FIG. 3 shows an integrated power graph in the first embodiment of the present invention.

  In the induction cooking device configured as described above, the operation and action will be described below with reference to FIGS.

  First, the steamer 1 having a lid is installed on the top plate 2, and when an automatic cooking course including a steaming course is selected by the operation unit 3, first electric power is supplied to the induction heating coil 4 by the control means 5. Is done. From the temperature detected by the temperature detecting means 6, the gradient θ1 of the water temperature in the steamer 1 is measured, and the larger the temperature gradient, the smaller the amount of water charged into the steamer 1, and the larger the larger the temperature.

  Next, when the temperature detecting means 6 detects that the water in the steamer 1 has boiled due to reaching the boiling temperature T1, the notifying means 7 notifies the boiling by voice or display. T1 is assumed to be, for example, a temperature around 98 ° C., but is not a limited numerical value. Thereafter, the control means 5 maintains the boiling while reducing the power provided to the induction overheating coil 4 to the duty at the second heating power instantaneous power Pc so as to keep the temperature detected by the temperature detection means 6 at the boiling. To do. In addition, boiling can also be measured when the rising gradient of the water temperature detected by the temperature detection means 6 becomes a predetermined value or less, and is not limited to a specific method.

  The integrated power detected by the integrated power calculation means 8 for calculating the integrated output from the start of heating changes as shown in FIG.

  As shown in FIG. 3, when the water in the steamer 1 reaches the integrated power Wa necessary until it disappears due to evaporation at time t2, the notification means 7 turns on water or hot water by voice or display. Notice.

  As described above, in the present embodiment, by detecting and controlling the bottom temperature of the steamer, it is possible to notify the optimum timing of feeding the cooked food while maintaining the boiling and notifying the boiling. it can. In addition, after the food is put in, the integrated power calculation means for calculating the integrated output from the start of heating detects the integrated power, and it can be seen that the water has decreased by evaporation without opening the lid. You can see when to insert.

  Moreover, in this Embodiment, after the notification means 7 alert | reports by t2, if the detected temperature of the temperature detection means 6 detects a temperature fall rapidly to T2, it will be considered that the water was added to the steamer 1, and the control means 5 will be Then, the power supplied to the induction heating coil 4 is increased to the third heating power Pb. The broken line in FIG. 3 indicates the detected temperature T when the input is continued with Pc. By increasing the input to Pb, the time until re-boiling can be shortened. Thereafter, when the temperature detected by the temperature detecting means 6 reaches the boiling temperature T1 and it is detected that the water in the steamer 1 has reached boiling, the input is reduced to the second heating power to maintain the boiling.

  As described above, in the present embodiment, even after the water is added, by detecting and controlling the bottom temperature of the steamer, it is possible to re-boil and further maintain the boiling. Cooking can be continued without any operation.

(Embodiment 2)
FIG. 4 shows a graph of the detected temperature T and the input when hot water is added after detecting the filling in the second embodiment of the present invention.

  In the induction cooking device configured as described above, the operation and action will be described below with reference to FIG.

  In the present embodiment, after the notification means 7 notifies at t2, when the detected temperature T of the temperature detection means 6 detects a temperature lower than the boiling continuation temperature T1 and higher than the reference temperature T2, the estimated water amount It is assumed that hot water has been added to the steamer 1 until the time t3 when it is estimated that the gas does not completely evaporate, and the control means 5 continues the power supplied to the induction heating coil 4 to maintain boiling.

  As described above, in the present embodiment, the boiling temperature can be maintained by detecting and controlling the bottom temperature of the steamer 1 even after the water is added, so that the user does not operate it. Cooking can be continued.

(Embodiment 3)
FIG. 5 shows a graph of detected temperature T and input when water or hot water is not added after water filling detection in the third embodiment of the present invention.

  In the induction cooking device configured as described above, the operation and action will be described below with reference to FIG.

  In this embodiment, after the notification means 7 notifies at t2, when the user does not put water or hot water into the steamer 1, it is estimated that the estimated amount of water is completely eliminated by evaporation. At time t3, the notification means 7 notifies the user with a warning sound. Further, t3 can be confirmed in advance by an experiment from the correlation between the amount of vapor evaporated and released to the outside in a steamer with a lid. At that time, the input is lowered to Pd lower than the input Pc necessary for maintaining boiling.

  As described above, in this embodiment, when the user does not add water or hot water even after supplying water, the output is reduced, the evaporation amount of water is reduced, and the user is warned. Can do.

  In addition, after the notification means 7 informs by warning that the estimated water amount is completely lost at t3, the temperature detection means 6 suddenly increases the temperature at the bottom of the steamer 1 to a temperature T3 of 100 ° C. or more. Is detected, it is considered that the water in the steamer 1 has completely disappeared, and the output is stopped. In addition, boiling can also be measured when the rising gradient of the water temperature detected by the temperature detecting means 6 becomes a predetermined value or more, and is not limited to a specific method.

  As described above, in the present embodiment, when the user does not add water or hot water even after the water is supplied, the output can be stopped and the pot can be prevented from being cooked empty.

  As mentioned above, since the induction heating cooking appliance concerning this invention can detect the water temperature in a steamer and can control an output, it can prevent the failure of steam cooking.

Characteristic diagram of induction heating cooking appliance in Embodiment 1 of the present invention Graph of detected temperature and input in Embodiment 1 of the present invention Integrated power graph in the first embodiment of the present invention Graph of detected temperature and input when hot water is added after water filling notification in Embodiment 2 of the present invention Graph of detected temperature and input when water or hot water is not added after water filling notification in Embodiment 3 of the present invention

DESCRIPTION OF SYMBOLS 1 Steamer 2 Top plate 3 Operation part 4 Heating coil 5 Control means 6 Temperature detection means 7 Notification means 8 Integrated electric power calculation means

Claims (6)

A steamer having a lid, a top plate on which the steamer is placed, an operation unit for performing an operation for selecting an automatic cooking course including a steaming course, an induction heating coil for heating the steamer, and an output to the induction heating coil A control means for controlling the temperature, a temperature detection means for detecting the temperature of the steamer, a notification means for notification by voice or display, and an integrated power calculation means for calculating an integrated output from the start of heating, When the steaming course is selected, the control means supplies a predetermined electric power to the induction heating coil, measures the temperature gradient from the temperature detected by the temperature detection means, and increases the temperature gradient so that it is put into the steamer. When the water amount in the steamer is boiled from the temperature detected by the temperature detection means, and the notification means More specifically, the temperature of the temperature detection means is detected, and then boiling is maintained while reducing the power provided to the induction heating coil, and the integrated power obtained by the integrated power calculation means is estimated. The induction heating cooking appliance which notifies that the said notification means will introduce | transduce water or hot water when it reaches | attains the predetermined electric power required until the water of the said amount of water which evaporates and is lost. If the temperature detection means detects a sudden temperature drop after the notification means notifies, it is considered that water has been added to the steamer, and the control means increases the power supplied to the induction heating coil and is detected by the temperature detection means. The induction cooking device according to claim 1, wherein the boiling water is detected by detecting that the water in the steamer has reached boiling from the determined temperature. After the notification means, when the temperature detection means detects a gradual temperature drop, it is considered that hot water has been added to the steamer, and the control means continues the power supplied to the induction heating coil to maintain boiling. The induction heating cooking apparatus of 1 or 2. After the notification means, if the temperature detection means detects that boiling has continued for a certain period of time, it is considered that water or hot water has not been put into the steamer, and the notification means will stop the input after a while. The induction heating cooking appliance according to any one of claims 1 to 3, wherein the user is notified by sound. After the notification means notifies, if the temperature detection means detects that boiling has continued for a certain time or more, it is considered that water or hot water has not been put into the steamer, and the control means lowers the input. The induction heating cooking appliance according to any one of the above. After the notification means notifies, if the temperature detection means detects that the temperature of the bottom of the steamer suddenly rises to 100 ° C or more, it is considered that the water in the steamer has completely disappeared, and the output is stopped. The induction heating cooking appliance according to any one of 5.