JP3567912B2 - Cooking device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooking device having a function of preventing overheating of a pot or the like containing oil during heating.
[0002]
[Prior art]
In a cooking device that heats a pot or the like, if the pot containing oil is continuously heated, the temperature of the oil rises and there is a risk of reaching the ignition temperature. In general, a threshold temperature is set so that heating is stopped when the temperature exceeds the temperature. In a heating cooker having a plurality of heating outputs, a control temperature (threshold) corresponding to each heating output is provided, and when the temperature detected by the temperature detecting means exceeds the control temperature, the current heating output is set. Is reduced, and when the detected temperature falls below the control temperature, the current heating output is controlled to be increased. This will be described below with reference to the drawings.
[0003]
FIG. 6 is a configuration block diagram of a conventional heating cooker. In FIG. 6, reference numeral 1 denotes a pot for cooking with oil or food, 2 a top plate on which the pot 1 is placed, and 3 a temperature sensor disposed on the back of the top plate 2 to detect the temperature of the pot 1 via the top plate 2. A heating control means for controlling the output of the heating means 4 in six stages (0 W, 330 W, 500 W, 900 W, 1450 W, 2000 W); Reference numeral 6 denotes a control temperature (stored in a control temperature storage unit (not shown)) serving as a threshold provided according to the output of the heating unit. Reference numeral 7 denotes a temperature control unit, which is detected by the temperature detection unit 3. The detected temperature is compared with the value of the control temperature 6 set in accordance with the output of the heating means 4, and when the temperature detected by the temperature detection means 3 exceeds or falls below the value of the control temperature 6, the heating control means 5 Heating hands Outputs a signal to change the output of.
[0004]
The operation of the heating cooker configured as described above will be described with reference to FIG. FIG. 7 is a diagram in a case where oil is put into the pan 1 and heated. The upper diagram shows the transition of the temperature detected by the temperature detecting means 3 (hereinafter referred to as a sensor) and the actual oil temperature at that time. 3 shows the output of the heating means 4.
[0005]
First, the output of the heating means 4 heats the pan 1 at 2000W. At this time, the temperature control means 7 determines whether the temperature detected by the sensor (hereinafter referred to as the sensor temperature) is higher or lower than the control temperature (185 ° C. in this case) corresponding to the output of the heating means 4. Then, after t71 from the start of heating, since the sensor temperature has exceeded 185 ° C., the temperature control means 7 outputs a signal to the heating control means 5 so as to reduce the output of the heating means 4. The heating control means 5 receives the signal from the temperature control means 7 and controls the heating means 4 so that the output of the heating means 4 becomes one step smaller output (1450 W). Hereinafter, the same control is repeated. When the sensor temperature exceeds 230 ° C. when the output of the heating unit 4 is 330 W (t75), the heating control unit 5 stops the output of the heating unit 4, that is, sets the output to 0 W. When the output of the heating means 4 is 0 W and the sensor temperature falls below 230 ° C. (t76), the temperature control means 7 outputs a signal to the heating control means 5 so as to increase the output of the heating means 4. . The heating control means 5 receives the signal of the temperature control means 7 and controls the heating means 4 so that the output of the heating means 4 becomes one step higher output (330 W).
[0006]
[Problems to be solved by the invention]
In general, since the relationship between the sensor temperature and the oil temperature differs depending on the amount of oil put into the pan, even if the amount of oil is small, to control the oil temperature from reaching the ignition temperature, the control temperature 6 according to each heating output must be controlled. It is necessary to set a low temperature. However, if the control temperature 6 is set too low, the heating output tends to decrease, such as when cooking a stir-fry, resulting in insufficient heating power and a decrease in cooking performance.
[0007]
The present invention solves the above-mentioned conventional problems, and provides a heating cooker that reduces the peak temperature even when the amount of oil in a pan is small, and that is less likely to be short of thermal power in stir-fry cooking or the like. The purpose is.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned conventional problems, the present invention provides a heating cooker including a control temperature changing means for changing a value of the control temperature by an output of a temperature control means.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 is a heating means for heating a pot or the like, a heating control means for controlling the output of the heating means in a plurality of stages, a temperature detecting means for detecting a temperature of the pot or the like, and an output of the heating means. Temperature control that outputs a signal to the heating control means to change the output of the heating means, based on a plurality of control temperatures according to the temperature, and a control temperature corresponding to the temperature detected by the temperature detection means and the output of the heating means. Means, comprising a control temperature changing means for changing the value of the control temperature by the output of the temperature control means , when the temperature detected by the temperature detection means exceeds the first control temperature and the output of the heating means is reduced, It is to increase the value of the second control temperature lower than the first control temperature by a predetermined temperature, and when the temperature detected by the temperature detecting means changes from rising to falling, the temperature rises When you are Since the output of the heating means can be increased at a higher temperature, when a load that is a cooking product is supplied while the pot or the like is being heated, the heating means is turned off at a stage where the temperature drop of the pan is relatively small. It is possible to increase the output and prevent shortage of heat in stir-fry cooking or the like and secure cooking performance.
[0010]
According to a second aspect of the present invention, when the temperature detected by the temperature detecting unit falls below the fourth control temperature and the output of the heating unit becomes large, the control temperature changing unit according to the first aspect of the present invention provides the control temperature changing unit. The temperature of the fourth control temperature higher than the control temperature is to be lowered by a predetermined temperature, the output of the heating means at a lower temperature when the temperature detected by the temperature detecting means has changed from falling to rising. Oil temperature rises when a pot containing oil is left unheated and no load is applied during heating, or when the load is light and there is almost no drop in oil temperature. Can be suppressed.
[0011]
According to a third aspect of the present invention, in particular, the control temperature changing means according to the second aspect prevents a change in lowering the control temperature from a predetermined maximum control temperature. In the case of a cooker in which the output of the heating means is stopped when the maximum temperature of the control temperature is exceeded, such a situation that heating is stopped at a low temperature, sufficient heating power cannot be obtained, and cooking performance is reduced. Can be prevented.
[0012]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
(Example 1)
FIG. 1 is a circuit block diagram of a heating cooker according to a first embodiment of the present invention. In this embodiment, the same components as those of the above-described conventional example are denoted by the same reference numerals, and the description thereof will be omitted.
[0014]
A characteristic configuration of the present embodiment is that a control temperature changing means 8 is newly provided, and when the temperature control means 7 outputs a signal to the heating control means 5, a specific control temperature stored in the control temperature storage means (not shown) is stored. 6 is changed. The operation of the control temperature changing means 8 will be described below with reference to FIGS.
[0015]
FIG. 2 is a diagram in a case where oil is put into the pot 1 and heated, and FIG. 3 is a diagram in a case where a stir-fry is cooked. In FIG. 2, the upper part shows the transition of the temperature detected by the temperature detecting means 3 (hereinafter referred to as a sensor) and the actual oil temperature at that time, and the lower part shows the output of the heating means 4.
[0016]
First, the output of the heating means 4 heats the pan 1 at 2000W. At this time, the temperature controller 7 determines whether the temperature detected by the sensor (hereinafter, sensor temperature) is higher or lower than the control temperature (185 ° C. in this case) corresponding to the output of the heater 4. Then, after t21 from the start of heating, since the sensor temperature has exceeded 185 ° C., the temperature control means 7 outputs a signal to the heating control means 5 so as to reduce the output of the heating means 4. The heating control means 5 receives the signal from the temperature control means 7 and controls the heating means 4 so that the output of the heating means 4 becomes one step smaller output (1450 W). When the sensor temperature exceeds 203 ° C. after t22, the temperature control unit 7 outputs a signal to the heating control unit 5 to reduce the output of the heating unit 4. The heating control means 5 receives the signal of the temperature control means 7 and controls the heating means 4 so that the output of the heating means 4 becomes one step smaller output (900 W). Then, the control temperature changing means 8 increases the control temperature (185 ° C. in this embodiment) lower than the control temperature 6 (203 ° C. in this embodiment) at which the output of the heating means 4 is changed to 190 ° C. by 5 ° C. I do. Hereinafter, the operation is repeatedly performed.
[0017]
In general, when oil is put into a pan and heated, and the heating operation is performed as in the conventional example, the oil temperature becomes highest immediately after the first heating is stopped, and then the heating is resumed, and then the temperature when the heating is stopped is the first time. Lower than the peak temperature. Further, when the amount of oil is small or when the temperature is indirectly detected as in the present embodiment, the difference between the sensor temperature and the actual oil temperature often greatly increases.
[0018]
In this embodiment, after the first heating is stopped from the start of heating, the temperature of the sensor decreases, the timing at which heating is restarted again by the heating means 4 is advanced, and the second peak temperature is increased. However, when foods such as stir-fry cooking are introduced, the output of the heating means 4 can be increased by one step at an earlier timing than before. If the control temperature once increased by the control temperature changing means 8 as in the present embodiment is prohibited from being increased again, the control temperature may cause a reversal phenomenon or the value may become too high. Can be prevented from being said to be in a state.
[0019]
In each operation of the present embodiment, the heating means is induction heating. However, in the case of heating by gas or a heater, the same operation and effect can be obtained when the temperature of the load pan is detected by the same detection method. Can be done.
[0020]
(Example 2)
Hereinafter, a second embodiment will be described with reference to the drawings. In the present embodiment, the configuration is the same as that of the first embodiment, so that the description thereof will be omitted, and only the operation of the control temperature changing means 8 will be described.
[0021]
4 and 5 are diagrams showing the operation of the control temperature changing means 8 and the transition of the sensor temperature in this embodiment. As shown in FIG. 4, when the sensor temperature is lower than the value of the control temperature 6 and the temperature control means 7 outputs a signal to the heating control means 5 to increase the output of the heating means 4, the control temperature changing means 8 Therefore, if the value of the control temperature 6 is changed to be lower, the peaks after the second time can be made smaller. Specifically, in FIG. 4, when the heating unit 4 is heating at 500 W (between t47 and t48), and the sensor temperature falls below 218 ° C. (t48), the temperature control unit 7 sends the heating control unit 5 On the other hand, a signal is output so as to increase the output of the heating means 4. The heating control means 5 receives the signal from the temperature control means 7 and controls the heating means 4 so that the output of the heating means 4 becomes an output (900 W) which is higher by one step. At the same time, the control temperature changing means 8 lowers the control temperature (225 ° C.) higher than the control temperature (218 ° C.) at that time by 3 ° C. and changes it to 222 ° C. In addition, if the maximum value of the control temperature (230 ° C. in this embodiment) is not changed, the heating is not easily stopped.
[0022]
Also, as shown in FIG. 5, when the sensor temperature is increasing, the control temperature is increased, and when the sensor temperature is decreasing, the control temperature is changed once and then increased, and the control temperature is returned (reduced). It is possible to improve the cooking performance of a stir-fry or the like while securing the same performance in oil heating as before. Further, the control temperature in the present embodiment is set to the same value as that of the conventional example, but if the initial value of the control temperature is set at a lower temperature than the conventional example, the peak temperature is further reduced for oil heating. It is possible.
[0023]
In each operation of the present embodiment, the heating means is induction heating. However, in the case of heating by gas or a heater, the same operation and effect can be obtained when the temperature of the load pan is detected by the same detection method. Can be done.
[0024]
【The invention's effect】
As described above, according to the present invention, the control temperature set in accordance with the output of the heating means is changed by the output of the temperature control means, and the value of the control temperature is not always constant. Since it is changed according to the detected temperature, each control temperature can be set to a low value in advance to prevent overheating during oil heating, and to secure cooking performance when cooking stir fry different from oil heating A cooker can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 2 is a diagram showing temperature transition during oil heating in the first embodiment. FIG. 3 is a diagram showing stir fry cooking in the first embodiment. Temperature transition diagram [FIG. 4] Same as above, temperature transition diagram during oil heating in the second embodiment [FIG. 5] Same, temperature transition diagram during oil heating in the second embodiment [FIG. 6] Conventional configuration FIG. 7 is a temperature transition diagram during oil heating in a conventional example. FIG. 8 is a temperature transition diagram during oil heating in a conventional example.
3 temperature detection means 4 heating means 5 heating control means 6 control temperature 7 temperature control means 8 control temperature change means

Claims (3)

Heating means for heating the pan, heating control means for controlling the output of the heating means in a plurality of stages, temperature detection means for detecting the temperature of the pan, a plurality of control temperatures according to the output of the heating means, Temperature control means for outputting a signal to the heating control means to change the output of the heating means according to the temperature detected by the temperature detection means and the control temperature, and changing the value of the control temperature by the output of the temperature control means Control temperature change means , the control temperature change means, when the temperature detected by the temperature detection means exceeds the first control temperature and the output of the heating means is reduced, the control temperature change means lower than the first control temperature A heating cooker that raises the value of the second control temperature by a predetermined temperature . The control temperature changing means decreases the value of the fourth control temperature higher than the third control temperature by a predetermined temperature when the temperature detected by the temperature detection means falls below the third control temperature and the output of the heating means increases. The heating cooker according to claim 1. The control temperature changing means, when the fourth control temperature is a predetermined maximum temperature, when the temperature detected by the temperature detection means falls below the third control temperature and the output of the heating means increases, The heating cooker according to claim 2, wherein the fourth control temperature is not changed.

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