JP2004022265A - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress temperature variations of oil in a pan depending on the amount of curvature of the bottom of the pan by precisely detecting the amount of curvature of the bottom of the pan appropriate to the temperature of the pan at the start of heating. <P>SOLUTION: When the temperature θs at the start of energization of a heating means 3 is lower than 70 °C, an energization control means 17 detects the amount of curvature of the bottom of the pan based on the gradient of a temperature rise under the energization of the heating means 3, thereby temperature controlling temperatures in accordance with the amount of curvature of the bottom of the pan while preventing the extension of a preheating time due to the interruption of the energization of the heating means 3. When the temperature θs is 70 °C or higher, the control means 17 interrupts the energization after the heating means 3 is supplied with only predetermined integrated power, and detects the amount of curvature of the bottom of the pan based on the degree of temperature rise/fall thereafter. The amount of curvature of the bottom of the pan is thus detected with relatively small integrated power, and an excessive rise in the temperature of oil in a pan with a curved bottom is thereby prevented. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heating cooker used in a general household.
[0002]
[Prior art]
Hereinafter, a conventional heating cooker will be described with reference to FIG. In the figure, 1 is a commercial power supply, 2 is a pot, and 3 is a heating means for inductively heating the pot 2, and is composed of a rectifier 31, a heating coil 32, a switching element 33, and an inverter circuit. Reference numeral 4 denotes a temperature sensor for detecting the temperature of the pot 2, and reference numeral 5 denotes a notifying means, which is constituted by a light emitting diode (LED) or a liquid crystal display element (LCD), and is visually constituted by a displaying means 51; And sound means 52 for notifying the user. Reference numeral 6 denotes an input means, and 7 denotes an energization control means. The switching element 33 is turned on / off at several tens of kHz, a high-frequency current is applied to the heating coil 32, and the pot 2 magnetically coupled to the heating coil 32 is induction-heated. The power supply control means 7 controls the output of the heating means 3 by controlling the ON time of the switching element 33.
[0003]
The energization control means 7 has seven set temperatures at 140 ° C. to 200 ° C. in steps of 10 ° C., and selects any one of the seven set temperatures based on a signal input from the input means 6. I do. Then, the energization control means 7 sets the control temperature corresponding to the selected set temperature as the target temperature θc, and controls the energization of the heating means 3 based on the relationship between the temperature detected by the temperature sensor 4 and the target temperature θc. Control is performed so that the oil temperature in 2 is stabilized at the selected set temperature.
[0004]
However, in the above-described configuration, when the bottom of the pan is used as the pan 2 and oil is put into the pan 2 and fried food is cooked, the temperature sensor 4 cannot detect the temperature of the pan 2 with good sense. Then, the temperature difference between the temperature detected by the temperature sensor 4 and the oil temperature in the pan 2 increases, and the oil temperature in the pan 2 rises excessively.
[0005]
As a means for solving this, as shown in Japanese Patent Application Laid-Open No. Hei 6-89780, the bottom of the pan 2 is set based on the temperature rise gradient detected by the temperature sensor 4 in a relatively low temperature range where the oil amount in the pan 2 is not affected. The target temperature θc is changed based on this and the flat bottom of the pan is used as the pan 2 to cook the fried food, and the oil in the pan 2 is maintained at the optimal temperature for the fried food. When the fried food is cooked by using the warped bottom as the pan 2, the temperature of the oil in the pan 2 is suppressed, or after heating for a predetermined time as shown in JP-A-7-254483. The heating output is stopped, and it is detected whether or not the bottom of the pan 2 is warped based on the time until the detected temperature becomes the maximum thereafter, and the target temperature θc is changed or the food is put into the pan 2 Whether to increase the heating amount when the temperature drops There is something to change.
[0006]
[Problems to be solved by the invention]
However, in the method disclosed in Japanese Patent Application Laid-Open No. 6-89780, in a low temperature region near room temperature, the amount of heat generated by energizing the heating means 3 is sufficiently larger than the amount of heat of "pot 2 + oil in pot 2". Since the oil in the pan 2 has a high viscosity in a low temperature state and does not convect immediately after the start of heating, the amount of warpage of the pan bottom of the pan 2 can be accurately detected without affecting the amount of oil in the pan 2, but in a relatively high temperature range of 70 ° C or higher. In the above, since the amount of heat due to the energization of the heating means 3 is smaller than the amount of heat of “pot 2 + oil in pot 2”, the difference in the temperature rise gradient detected by the temperature sensor 4 due to the amount of warpage of the pot bottom of the pan 2 is small As a result, it becomes impossible to accurately detect the amount of warpage at the bottom of the pot, and since the oil in the pot 2 has a low viscosity in a high temperature state and convection immediately after heating starts, the temperature rise gradient affects the amount of oil in the pot 2. The amount of warpage at the bottom of the pot Impact can not be detected without.
[0007]
Further, in the method disclosed in Japanese Patent Application Laid-Open No. 7-254483, the oil in the pan 2 cannot be heated while the heating is stopped and the presence or absence of the warpage of the bottom of the pan is detected. Will increase. In addition, since the presence or absence of the warpage of the bottom of the pot is detected by utilizing the temperature drop due to the heat radiation effect at the time of stopping the heating, the pot 2 must be heated until the pot 2 reaches a high temperature state. The predetermined time needs to be set to a relatively long time so that the presence or absence of warpage of the pot bottom can be detected even when the temperature is low. Therefore, conversely, when the heating of the pot 2 which is already in a high temperature state and the pot bottom is warped, a relatively large amount of heat is applied until the presence or absence of the warpage of the pot bottom is detected, and the oil in the pot 2 is excessively discharged. However, there is a problem that heating is performed.
[0008]
The present invention solves the above-mentioned conventional problems, and performs accurate detection of the amount of warpage of the bottom of the pot suitable for the temperature of the pot at the start of heating, thereby suppressing oil temperature variation in the pot due to the amount of warpage of the bottom of the pot. It is an object of the present invention to provide a cooking device that performs heating.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the cooking device of the present invention detects the amount of warpage of the pot bottom based on the temperature detected by the temperature sensor, and controls the energization of the heating means based on the temperature detected by the temperature sensor and the amount of warpage of the pot bottom. A current sensor for detecting a temperature detected by the temperature sensor when the heater is energized when the temperature detected by the temperature sensor is lower than a first predetermined temperature. The amount of warpage of the bottom of the pot is detected based on the rising gradient of the heating means, and when the temperature detected by the temperature sensor when energizing the heating means is equal to or higher than the first predetermined temperature, the heating means is energized by a predetermined integrated power amount. The power supply is cut off or the amount of power supply is suppressed, and the amount of warpage at the bottom of the pot is detected based on the degree of temperature rise / fall detected by the temperature sensor thereafter.
[0010]
Thereby, the power supply control means selects a pot warpage amount detection method suitable for the temperature state of the pot based on the temperature detected by the temperature sensor when the power supply to the heating means is started, and sets the heating means at a low temperature of about room temperature. When power supply to the heating unit is started, the amount of warpage at the bottom of the pot is detected based on the temperature rise gradient detected by the temperature sensor while maintaining the power supply to the heating unit without interrupting the power supply to the heating unit. At the start, after the heating means is energized by a relatively small integrated power amount, the energization is cut off or the energization amount is suppressed, and the amount of warpage of the pan bottom is quickly detected based on the degree of temperature rise / fall detected by the temperature sensor thereafter. .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention described in claim 1 is a heating means for heating the pan, a temperature sensor for detecting the temperature of the pan, and detecting the amount of warpage of the bottom of the pan based on the temperature detected by the temperature sensor, and detecting the amount of warpage of the bottom of the pan. Power supply control means for controlling the power supply to the heating means based on the temperature to be applied and the amount of warpage of the pot bottom, wherein the power supply control means detects a first predetermined temperature detected by the temperature sensor when power supply to the heating means is started. When the temperature is less than the temperature, the amount of warpage of the bottom of the pan is detected based on a rising gradient of the temperature detected by the temperature sensor while the heating unit is energized, and the temperature detected by the temperature sensor when the energization is started to the heating unit is the temperature. When the temperature is equal to or higher than the first predetermined temperature, the power supply to the heating unit is supplied by a predetermined integrated power amount, and then the power supply is cut off or the power supply amount is suppressed. By detecting the amount of warpage at the bottom of the pot, for example, when the first predetermined temperature is 70 ° C., the oil is heated in a low temperature state of about room temperature in order to put oil in the pot and preheat and cook the fried food. When energization is started by the unit, the energization control unit increases the temperature detected by the temperature sensor during energization of the heating unit, when the temperature detected by the temperature sensor when energization of the heating unit is lower than the first predetermined temperature. Since the amount of warpage of the bottom of the pot is detected based on the gradient, the preheating time is prevented from increasing due to the interruption of the power supply to the heating means. Using the point that the rising effect is large, it is possible to perform high-precision pot warpage detection that does not depend on the oil amount in the pot.
[0012]
Further, when the heating means is started to be energized in a high temperature state, for example, once the cooking of fried food is interrupted, and the cooking of fried food is performed again several minutes later, the energization control means detects the temperature by the temperature sensor when the energization of the heating means is started. After the temperature is equal to or higher than the first predetermined temperature, the heating means is energized by a predetermined integrated power amount, and then the power supply is cut off or the power supply amount is suppressed, and the amount of warpage of the pot bottom based on the degree of temperature rise / fall detected by the temperature sensor thereafter High temperature accuracy, which does not depend on the amount of oil in the pan, utilizing the point that the temperature drop effect due to heat radiation is large at high temperatures and the dependence of the heat transfer from the bottom of the pan to the temperature sensor depends on the amount of warpage of the pan The bottom temperature of the pan can be detected and the temperature of the temperature detected by the temperature sensor can be detected by applying only a small amount of heat. It is possible to detect the temperature / lower degree, while suppressing the integral power consumption of the heating means to a relatively small value, the oil temperature in the pot can be prevented from increasing excessively.
[0013]
The invention according to claim 2 is, in particular, a case in which the power supply control means according to claim 1 warps the pot bottom when the temperature detected by the temperature sensor when the power supply to the heating means is started is lower than the first predetermined temperature. The temperature rise gradient determination value for detecting the amount is changed based on the temperature detected by the temperature sensor when energizing the heating unit is started, so that the temperature detected by the temperature sensor increases as the temperature at the start of heating increases. Since the determination value of the temperature rise gradient is changed in accordance with the characteristic that the rise gradient of the temperature rise becomes small, the accuracy of detecting the amount of pot warpage can be further improved.
[0014]
According to a third aspect of the present invention, in particular, when the power supply control means according to the first aspect detects a temperature detected by a temperature sensor at the time of starting to supply power to the heating means, the temperature is equal to or higher than a first predetermined temperature. The amount of integrated power supplied to the heating means for detecting the amount is changed based on the temperature detected by the temperature sensor when the heating means is started to be supplied. In this case, the integrated power amount of the heating means is changed in accordance with the characteristic of detecting the degree of temperature rise / fall detected by the temperature sensor, so that the higher the oil temperature in the pot, the higher the temperature of the pot. The temperature adjustment control according to the amount of warpage of the pan bottom can be performed early by reducing the amount of electric power supplied to the pan, and the oil temperature in the pan can be prevented from excessively rising.
[0015]
The invention according to claim 4 is, in particular, a state in which the energization control unit according to claim 1 holds the latest detected amount of warpage of the bottom of the pan as warpage data, and controls the energization control of the heating unit to heat the pan. When the power supply to the heating means is continued to be interrupted and the pan is heated to a state in which the heating is completed, and then the heating means is started again, the warp amount data to be held without performing the operation of detecting the warp amount of the pan bottom is performed. Based on the above, the heating means is controlled to be energized, so that the amount of warpage at the bottom of the pan can be accurately detected regardless of the temperature of the pan at the start of heating, and, for example, fry cooking is performed after completion of preheating, and then the fry cooking is temporarily terminated. Therefore, even if the heating is finished, the detected amount of warpage of the pot bottom can be held as warpage data. Then, when heating is started to resume fried food cooking, the operation of detecting the amount of warpage at the bottom of the pot is not performed, and the heating means is energized based on the held warpage amount data, and immediately the frying is performed. Cooking can be resumed.
[0016]
According to a fifth aspect of the present invention, in particular, when the energization control means according to the fourth aspect starts energizing the heating means again, if the temperature detected by the temperature sensor is lower than the second predetermined temperature, the bottom of the pan again. Warp amount is detected and the heating means is energized, and if the temperature detected by the temperature sensor is equal to or higher than the second predetermined temperature, the warp amount data held without performing the operation of detecting the warp amount of the pan bottom Based on the above, the heating means is controlled to be energized, and once the heating is ended to end the cooking of the fried food, the energization control means holds the amount of warpage of the pan bottom as warpage data, for example, after a short time such as several minutes, When heating is started to resume cooking, the temperature detected by the temperature sensor is still high, so that the operation of detecting the amount of warpage at the bottom of the pot is not performed and the heating means is energized based on the held warpage amount data. Then, it can be resumed as soon as frying. Also, for example, if heating is started to cook fried food in another pot after a long time such as the next day, the temperature detected by the temperature sensor is a low temperature near room temperature, so after detecting the amount of warpage of the pot bottom again The heating means can be energized to perform temperature adjustment control according to the amount of warpage of the another pot bottom.
[0017]
According to a sixth aspect of the present invention, in particular, the energization control means according to the fourth aspect measures an interval time from a transition to a state in which heating of the pan is completed to a start of heating of the pan again, and If the time is equal to or longer than the predetermined time, the amount of warpage of the pot bottom is detected again to control the energization of the heating means, and if the interval time is less than the predetermined time, the operation for detecting the amount of warp of the pan bottom is maintained. The energization control of the heating means is performed based on the warpage amount data, and once the heating is terminated to end the cooking of the fried food, the energization control means holds the amount of warpage at the bottom of the pan as warpage data, for example, a short time such as several minutes later. If heating is started to restart fried food cooking after, the energizing control of the heating means based on the held warpage amount data without performing the operation of detecting the warpage amount of the pan bottom, It is possible to resume the frying to ingredients.
[0018]
In addition, for example, when heating is started to perform fried food cooking in another pot after a long time such as the next day, the amount of warpage of the bottom of the pot is detected again, and then the heating unit is energized to control the warping of the another bottom of the pot. Temperature adjustment control according to the amount can be performed.
[0019]
According to a seventh aspect of the present invention, in particular, the energization control unit according to the fifth or sixth aspect sets the heating mode based on a relationship between a temperature detected by a temperature sensor and a control temperature as an operation mode for energizing the heating unit. A fry mode in which the means is controlled to be energized; and a heating mode in which the heating means is controlled to be energized at a predetermined output. When the operation mode is changed from the fried mode to the fried mode again via the heating mode, the temperature sensor is used. Irrespective of the temperature detected in the step, the amount of warpage of the bottom of the pot is detected again to control the energization of the heating means, thereby having the effect of claim 5 or 6. When the process is completed, the power supply control means retains the amount of warpage at the bottom of the pot as warpage data, but then replaces it with another pot and boil, boil, or fry in the heating mode. Even if cooking is performed continuously, and further replaced with another pot and changed to the fry mode, and the fry cooking is continuously performed, the power supply control means changes the operation mode from the fry mode to the fry mode again via the heating mode. Is reached, the heating means is controlled again after detecting the amount of warpage of the pot bottom again, so that the temperature adjustment control according to the amount of warpage of the another pot bottom can be performed.
[0020]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
(Example 1)
1 to 5 show a heating cooker according to a first embodiment of the present invention, in which components having the same functions as those of the conventional example are given the same reference numerals.
[0022]
In FIG. 1, the energization control unit 17 turns on and off the switching element 33 at several tens of kHz, applies a high-frequency current to the heating coil 32, and induction heats the pan 2 that is magnetically coupled to the heating coil 32.
[0023]
In addition, the power supply control means 17 includes, as an operation mode, an initial mode in which the power supply to the heating means 3 is turned off, and a signal input from the input means 6 having seven set temperatures at 140 ° C. to 200 ° C. every 10 ° C. A fry mode in which an arbitrary one is selected from the seven set temperatures based on the relationship between the temperature detected by the temperature sensor 4 and the target temperature θc associated with the selected set temperature. There are two types.
[0024]
Then, the temperature detected by the temperature sensor 4 when the operation mode is changed from the initial mode to the frying mode based on the signal input from the input means 6 is stored as the heating start temperature θs, and when θs <70 ° C., the heating means 3 is stored. Is supplied at 980 W for 40 seconds, and the amount of warpage of the pot bottom is detected based on the second derivative of the temperature detected by the temperature sensor 4 during this time. When θs ≧ 70 ° C., the heating means 3 is turned on at 1400 W for a predetermined time. After the power was supplied, the power supply was interrupted, and the amount of warping of the bottom of the pot was detected based on the time until the temperature detected by the temperature sensor 4 reached the maximum value.
[0025]
FIG. 2 shows the details of the power supply control means 17. The power supply control means 17 supplies power to the heating means 3 at 980 W for 40 seconds, and based on the second derivative of the temperature detected by the temperature sensor 4 during this time. The amount of warpage of the bottom of the pot is determined based on the time until the temperature detected by the temperature sensor 4 reaches the maximum value after the power supply is cut off for a predetermined time by the low-temperature pot warpage detecting means 17a and 1400W for detecting the amount of warpage. Is provided with a high-temperature pan warp detecting means 17b for detecting the warpage.
[0026]
Then, based on the heating start temperature θs, the pan warpage amount detection switching unit 17c detects the amount of warpage at the bottom of the pan with the low temperature pan warpage amount detection unit 17a if θs <70 ° C., and if θs ≧ 70 ° C., The configuration is such that the amount of warpage of the pot bottom is detected by the amount detecting means 17b.
[0027]
The operation of the cooking device configured as described above will be described with reference to FIGS.
[0028]
FIG. 3 shows the operation of the low-temperature pan warpage detecting means 17a. When preheating is started to put oil in the pan 2 which has been adjusted to room temperature, install the apparatus, operate the input means 6, and start fry cooking, power supply control is performed. The means 17 changes the operation mode from the initial mode to the frying mode based on the signal input from the input means 6, and first performs a temperature rise end detection operation of waiting for the temperature detected by the temperature sensor 4 to stop rising. This is because when a pan preheated by another heat source is installed, the temperature detected by the temperature sensor 4 rises due to factors other than the energization of the heating means 3 and adversely affects the pot warpage amount detection operation. This is to prevent
[0029]
Eventually, when the temperature rise end detection operation is completed, the pot warp amount detection switching unit 17c of the energization control unit 17 shifts to the pot warp amount detection operation with the temperature detected by the temperature sensor 4 as the heating start temperature θs. From the start temperature θs <70 ° C., it is selected that the low-temperature pan warpage detecting means 17a detects the amount of warpage of the pan bottom.
[0030]
Then, the energization control unit 17 controls the heating unit 3 to energize at 980 W for 40 seconds, and the low-temperature pan warp detecting unit 17a inputs the temperature detected by the temperature sensor 4 via the pan warp detection switching unit 17c. Then, the temperature rise value Δθa detected by the temperature sensor 4 for 10 seconds from the start of energization of the heating unit 3 and the temperature detected by the temperature sensor 4 for 10 seconds from 30 seconds to 40 seconds after the start of energization The rise value Δθb is measured, and d2θ = Δθb−Δθa is calculated.
[0031]
By the way, when the temperature rise gradient is measured by the second derivative, even when the pan preheated by another heat source is installed and the frying mode is started, the linear temperature rise component due to the calorific value already possessed by the pan 2 itself is obtained. By excluding it, it is possible to measure only the temperature rise component due to the energization of the heating means 3, and it is possible to more accurately detect the amount of warpage of the pot bottom.
[0032]
That is, as shown in FIG. 3, d2θ = Δθ2-Δθ1 when the pan bottom of the pan 2 is flat becomes larger than d2θ = Δθ3-Δθ1 when the pan bottom of the pan 2 is warped, and the value of d2θ is The value depends on the amount of warpage. In addition, since the oil has a high viscosity at low temperature, heat is not transferred from the pot 2 to the oil without convection for 980 W-40 seconds, and only the pot 2 is in a heated state. The value does not depend on the oil amount of the oil.
[0033]
Then, the low-temperature pot warpage detecting means 17a determines the amount of warpage of the pot bottom based on d2θ in four stages of warpage ranks = 1 to 4, and thereafter, the energization control means 17 responds to the warp rank and sets the inside of the pot 2 Target temperature θc for controlling the oil temperature to become the selected set temperature, an initial correction temperature Δθh for setting the target temperature θc higher for preheating, or the food is put into the pan 2 When the detected temperature drop is detected, the load correction temperature Δθf for increasing the target temperature θc to increase the heating amount of the heating means 3 is changed. Is determined to be unsuitable for cooking fried food, and thereafter, the power supply to the heating means 3 is cut off, and at least one of the display means 51 or the sound means 52 of the notification means 5 is controlled, so that the user of the appliance can use the apparatus. Pot 2 is fried Control such as visually or audibly informing that cooking is inappropriate is performed. In this case, it is assumed that the larger the numerical value of the warp rank is, the larger the warp amount of the pot bottom is.
[0034]
According to the above configuration, when the pot 2 containing oil is preheated from a room temperature state and fried food is cooked, the energization control unit 17 does not cut off the energization of the heating unit 3 on the way, and adjusts the amount of oil in the pan 2. It accurately detects the amount of warpage of the bottom of the pot without depending on it, performs temperature adjustment control corresponding to the detected amount of warpage of the bottom of the pot, and performs cooking performance in a flat pot with a bottom of the pot and oil temperature in a pot with a bent bottom of the pot. Both suppression can be achieved.
[0035]
Although the low-temperature pan warpage detecting means 17a of the first embodiment detects the amount of warpage of the pan bottom based on the second derivative of the temperature at a predetermined time, the primary differential value of the temperature at a predetermined time, A similar effect can be obtained as long as the method can measure the temperature rise gradient in a relatively short time such that the oil in the pan 2 does not convect, such as the differential value of time in the temperature difference.
[0036]
FIG. 4 shows the operation of the high-temperature pan warp detecting means 17b. When the input means 6 is operated to end the cooking of the deep-fried food, and after a few minutes, the input means 6 is operated again to restart the deep-fried food. The control means 17 changes the operation mode from the initial mode to the frying mode based on the signal input from the input means 6, and as described in the description of FIG. 3, first, the temperature detected by the temperature sensor 4 does not increase. The end of the temperature rise detection operation is performed to wait for.
[0037]
Eventually, when the temperature rise end detection operation is completed, the pot warp amount detection switching unit 17c of the energization control unit 17 shifts to the pot warp amount detection operation with the temperature detected by the temperature sensor 4 as the heating start temperature θs. From the starting temperature θs ≧ 70 ° C., it is selected that the high-temperature pan warpage detecting means 17b detects the warpage of the pan bottom. Then, the energization control unit 17 shuts off the energization of the heating unit 3 after energizing the heating unit 3 at 1400 W for one minute. Thereafter, the high-temperature pot warpage detecting means 17b measures the time T until the temperature detected by the temperature sensor 4 reaches the maximum value.
[0038]
That is, as shown in FIG. 4, the time T1 when the pan bottom of the pan 2 is flat is smaller than the time T2 when the pan bottom of the pan 2 is warped, and the value of the time T depends on the amount of warpage of the pan bottom. Value. When the amount of oil in the pan 2 is large, the temperature difference that rises from the time when the heating means 3 is turned off to the time when the temperature detected by the temperature sensor 4 reaches the maximum value becomes small, but the time T is reduced to the amount of oil. It is almost constant regardless of the value.
[0039]
Further, since the pot 2 is already in a high temperature state at the start of heating, even if a relatively small amount of heat is applied, the temperature of the pot 2 rises / falls due to the heat radiation effect, and the time T can be easily measured.
[0040]
Then, the high-temperature pot warpage detecting means 17b determines the amount of warpage of the pot bottom based on the time T in four stages of warpage ranks = 1 to 4. Thereafter, the energization control means 17 is described in the description of FIG. Such temperature adjustment control corresponding to the amount of warpage of the pot bottom is performed.
[0041]
With the above configuration, once the fried food is finished, and when the fried food is restarted a few minutes later, the power supply control means 17 performs the pot warpage amount detection operation with a relatively small integrated power amount and immediately detects the pan bottom. The temperature adjustment control corresponding to the amount of warpage can be performed, and when a pot with a warped bottom is used as the pot 2, the oil temperature in the pot 2 excessively increases during the pot warpage amount detection operation. Can be prevented.
[0042]
The energization control unit 17 of the first embodiment shuts off the energization of the heating unit 3 after energizing the heating unit 3 at 1400 W for 1 minute at the heating start temperature θs ≧ 70 ° C. The same effect can be obtained by a configuration in which the amount of electricity of 3 is suppressed to a value smaller than the amount of heat radiated by the pan 2.
[0043]
Further, as shown in FIG. 5, the higher the heating start temperature θs, the lower the secondary differential value d2θ of the temperature in the low-temperature pot warpage detecting means 17a tends to be. By changing the judgment values 1 to 3 based on the heating start temperature θs, it is possible to further improve the accuracy of detecting the amount of warpage of the pot bottom.
[0044]
Further, in the high-temperature pan warp detecting means 17b, as the heating start temperature θs is higher, the time for energizing the heating means 3 in the pan warp detecting operation is shortened, and after the heating means 3 is de-energized, the temperature sensor 4 By changing the judgment value for judging the warpage rank to be smaller than the time T until the temperature detected at the time becomes the maximum value, the oil temperature in the pot 2 becomes excessive during the pot warpage amount detecting operation. Can be prevented from rising.
[0045]
(Example 2)
FIG. 6 shows the power supply control means of the heating cooker according to the second embodiment of the present invention.
[0046]
The difference from the first embodiment is that the power supply control unit 17 stores the latest warp rank detected by the low-temperature pan warp amount detecting unit 17a or the high-temperature pan warp amount detecting unit 17b via the pan warp amount detection switching unit 17c. 17d. When the operation mode is changed from the initial mode to the deep-fried food mode, if the temperature detected by the temperature sensor 4 is equal to or greater than 100 ° C., the power supply control unit 17 stores the warp rank stored in the pan warp amount storage unit 17d in the pan warp amount. The temperature is read out via the detection switching means 17c and temperature adjustment control is performed based on the warpage rank. If the temperature detected by the temperature sensor 4 is <100 ° C., the low-temperature pan warpage detection means 17a or the high-temperature pan warpage detection means 17b is again performed. In this manner, a pan warp amount detecting operation is performed to generate a warp rank, and temperature adjustment control is performed based on the re-created warp rank.
[0047]
The operation of the heating cooker configured as described above will be described. For example, after fry cooking at a set temperature of 180 ° C. in the fry mode, the operation mode is changed to the initial mode by operating the input means 6 to temporarily end the fry cooking, and after several minutes, the input means 6 is operated again. When the operation mode is changed to the fry mode and the fry cooking is resumed, the temperature detected by the temperature sensor 4 ≧ 100 ° C. because the temperature of the pan 2 and the oil in the pan 2 is still high. At this time, the power supply control unit 17 reads out the warp rank stored in the pan warp amount storage unit 17d via the pan warp amount detection switching unit 17c, and performs the temperature based on the warp rank without performing the pan warp amount detection operation again. Perform adjustment control.
[0048]
With the above configuration, even if the fried food is once finished and then fried food is resumed several minutes later, it is not necessary to wait only during the operation of detecting the amount of warpage of the pan, and the fried food can be immediately resumed.
[0049]
Also, for example, after performing fried food cooking in the fried food mode, operating the input means 6 to change the operation mode to the initial mode and ending the fried food cooking, the next day, replacing the pot 2 with another one and adding oil, When the operation mode is changed to the deep-fried food mode by operating the input means 6 and the deep-fried food is cooked, the temperature detected by the temperature sensor 4 is <100 ° C. because the temperature of the pan 2 and the oil in the pan 2 is near room temperature. At this time, the power supply control means 17 performs the pot warpage amount detection operation again by the low temperature pot warpage amount detection means 17a or the high temperature pot warpage amount detection means 17b to create a warp rank, and based on the re-created warp rank. Perform temperature control.
[0050]
With the above configuration, when heating is started to cook fried food in another pot after a long time, such as the next day, the amount of warpage at the bottom of the pot is detected again, and then the heating means 3 is energized and controlled. Temperature control according to the amount of warpage.
[0051]
(Example 3)
Next, an energization control unit of the heating cooker according to the third embodiment of the present invention will be described with reference to FIG.
[0052]
The difference from the second embodiment is that the energization control unit 17 includes a timer 17e for measuring an interval time, and starts timing when the operation mode is changed from the deep-frying mode to the initial mode. When the operation mode is changed from the initial mode to the deep-fried food mode, if the interval time is less than 10 minutes, the power supply control means 17 stores the warp rank stored in the pan warp amount storage means 17d in the pan warp amount detection switching means 17c. And the temperature adjustment control is performed based on the warp rank. If the interval time is equal to or more than 10 minutes, the pot warp amount detection operation is performed again by the low-temperature pan warp amount detecting means 17a or the high-temperature pan warp amount detecting means 17b. And a temperature adjustment control is performed based on the re-created warpage rank.
[0053]
The operation of the heating cooker configured as described above will be described. For example, after fry cooking at a set temperature of 180 ° C. in the fry mode, the operation mode is changed to the initial mode by operating the input means 6 to temporarily end the fry cooking, and after several minutes, the input means 6 is operated again. When the operation mode is changed to the fry mode and the fry cooking is resumed, the interval time is shorter than 10 minutes. At this time, the power supply control unit 17 reads out the warp rank stored in the pan warp amount storage unit 17d via the pan warp amount detection switching unit 17c, and performs the temperature based on the warp rank without performing the pan warp amount detection operation again. Perform adjustment control.
[0054]
With the above configuration, even if the fried food is once finished and then fried food is resumed several minutes later, it is not necessary to wait only during the operation of detecting the amount of warpage of the pan, and the fried food can be immediately resumed.
[0055]
Also, for example, after performing fried food cooking in the fried food mode, operating the input means 6 to change the operation mode to the initial mode and ending the fried food cooking, the next day, replacing the pot 2 with another one and adding oil, In the case where the operation mode is changed to the fry mode by operating the input means 6 and fry cooking is performed, the interval time ≥ 10 minutes. At this time, the power supply control means 17 performs the pot warpage amount detection operation again by the low temperature pot warpage amount detection means 17a or the high temperature pot warpage amount detection means 17b to create a warp rank, and based on the re-created warp rank. Perform temperature control.
[0056]
With the above configuration, when heating is started to cook fried food in another pot after a long time, such as the next day, the amount of warpage at the bottom of the pot is detected again, and then the heating means 3 is energized and controlled. Temperature control according to the amount of warpage.
[0057]
(Example 4)
Next, an energization control unit of the heating cooker according to the fourth embodiment of the present invention will be described with reference to FIG.
[0058]
The difference from the second and third embodiments is that the energization control unit 17 has a total of three types of operation modes, in addition to the initial mode and the fried food mode, as well as the heating mode. The heating mode is provided with a setting output section 17f having seven setting outputs in the range of 90 W to 2000 W, and an arbitrary one is selected from the seven setting outputs based on a signal input from the input means 6. The energization control of the heating means 3 is performed so that the set output is obtained.
[0059]
Then, based on the signal input from the input means 6, the energization control unit 17 changes the operation mode from the fry mode to the fry mode again via the heating mode, and when the operation mode is changed to the fry mode again, the temperature and the interval time are changed. Regardless, the low-temperature pan warpage detecting means 17a or the high-temperature pan warpage detecting means 17b again detects the warpage of the pan bottom.
[0060]
The operation of the heating cooker configured as described above will be described. For example, after fried food is cooked in the fried food mode, the operation mode is changed to the initial mode by operating the input means 6 to temporarily end the fried food cooking, and then the pot 2 is replaced with another one, and the input means 6 is changed. The operation mode is changed to the heating mode by operating, and heating cooking such as boiling, boiling, or frying is continuously performed.
[0061]
Then, the input means 6 is operated to change the operation mode to the initial mode to end the heating cooking, the pot 2 is replaced with another one, and the input means 6 is operated to change the operation mode to the deep-fried food mode to continuously operate. When cooking the fried food, the energization control means 17 detects that the operation mode is changed from the fried food mode to the fried food mode again via the heating mode, performs the pot warpage amount detection operation again, and then performs heating. The means 3 is energized.
[0062]
With the above configuration, even if fry cooking → heating cooking → fry cooking is performed continuously in separate pans, the power supply control means 17 adjusts the temperature corresponding to the amount of warpage of each pan before and after the heating cooking. Control can be performed.
[0063]
The energization control unit 17 of the fourth embodiment has three operation modes of an initial mode, a fried food mode, and a heating mode such as boiling, boiling, or frying. However, instead of the heating mode, a steak is baked. The same effect can be obtained also as a heating mode for performing cooking or a heating mode for performing steamed food cooking.
[0064]
【The invention's effect】
As described above, according to the heating cooker of the present invention, by accurately detecting the amount of warpage of the bottom of the pot suitable for the temperature of the pot at the start of heating, the oil temperature variation in the pot due to the amount of warpage of the bottom of the pot. It is possible to provide a heating cooker that suppresses the heating.
[Brief description of the drawings]
FIG. 1 is a block diagram of a heating cooker according to a first embodiment of the present invention.
FIG. 2 is a block diagram of a power supply control means in the cooking device.
FIG. 3 is a diagram showing an operation of a low-temperature pan warpage detecting means in the energization control means.
FIG. 4 is a diagram showing an operation of a high-temperature pan warpage amount detecting means in the energization control means.
FIG. 5 is a diagram showing the temperature dependence of a low-temperature pan warpage detecting means in the energization control means.
FIG. 6 is a block diagram of a power supply control unit of the heating cooker according to the second to fourth embodiments of the present invention.
FIG. 7 is a block diagram of a conventional heating cooker.
[Explanation of symbols]
2 pots
3 heating means
4 Temperature sensor
6 Input means
17 Electricity control means
17a Low-temperature pan warpage detecting means
17b High-temperature pot warpage detecting means
17c Pot warping amount detection switching means
17d Pan warp storage means
17e timer
17f setting output section

Claims (7)

Heating means for heating the pan, a temperature sensor for detecting the temperature of the pan, and detecting the amount of warpage of the bottom of the pan based on the temperature detected by the temperature sensor, the temperature detected by the temperature sensor and the amount of warpage of the pan bottom Power supply control means for controlling the power supply of the heating means based on the temperature sensor when the temperature detected by the temperature sensor when the power supply to the heating means is started is lower than a first predetermined temperature. When the amount of warping of the bottom of the pot is detected based on a rising gradient of the temperature detected by the temperature sensor during energization, and when the temperature detected by the temperature sensor when energizing the heating means is equal to or higher than the first predetermined temperature, After energizing the heating means by a predetermined integrated amount of power, the energization is cut off or the amount of energization is suppressed, and the amount of warping of the pan bottom is determined based on the degree of temperature rise / fall detected by the temperature sensor thereafter. Heating cooker so as to knowledge. When the temperature detected by the temperature sensor at the time of starting energization of the heating means is lower than the first predetermined temperature, the temperature rise gradient determination value for detecting the amount of warpage of the pan bottom is determined when the energization of the heating means is started. 2. The cooking device according to claim 1, wherein the temperature is changed based on a temperature detected by the temperature sensor. When the temperature detected by the temperature sensor at the time of energizing the heating means is equal to or higher than the first predetermined temperature, the integrated power amount to be applied to the heating means for detecting the amount of warping of the bottom of the pot is determined by the following: The heating cooker according to claim 1, wherein the temperature is changed based on a temperature detected by a temperature sensor at the time of the heating. The energization control unit holds the latest detected amount of warpage of the bottom of the pan as warpage data, and from the state in which the heating unit is energized to heat the pan, the state in which the energization of the heating unit is continued to end the heating of the pan. 2. The configuration according to claim 1, wherein when the energization of the heating means is started again thereafter, the energization control of the heating means is performed based on the held warpage amount data without performing the operation of detecting the amount of warpage of the pan bottom. Heating cooker. The energization control means controls the energization of the heating means by detecting the amount of warpage of the bottom of the pan again if the temperature detected by the temperature sensor is lower than the second predetermined temperature when the energization of the heating means is started again. 5. The apparatus according to claim 4, wherein if the temperature detected by the sensor is equal to or higher than the second predetermined temperature, the energization control of the heating unit is performed based on the data of the amount of warpage held without performing the operation of detecting the amount of warpage of the pot bottom. Heating cooker. The energization control means measures an interval time from the transition to the state in which heating of the pan is completed to the time when the heating of the pan is started again, and if the interval time is equal to or longer than a predetermined time, detects the amount of warpage of the pan bottom again. The heating means is controlled to be energized, and if the interval time is shorter than the predetermined time, the heating means is controlled to be energized based on warpage amount data held without performing an operation of detecting the warpage amount of the pan bottom. 5. The cooking device according to 4. The energization control unit includes, as an operation mode for energizing the heating unit, a fry mode for energizing the heating unit based on a relationship between a temperature detected by a temperature sensor and a control temperature, and energizing control for the heating unit at a predetermined output. When the operation mode changes from the deep-fried food mode to the deep-fried food mode via the heating mode again, regardless of the temperature detected by the temperature sensor, the amount of warpage of the bottom of the pan is detected again and the heating is performed. The heating cooker according to claim 5 or 6, wherein the means is configured to control energization.

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