JP3003104U - Heating cooker - Google Patents

Abstract

(57) [Abstract] [Purpose] In a heating cooker such as a table cooker, it prevents overheating that causes a fire such as tempura and improves the usability when performing high-temperature cooking and low-temperature cooking in a complicated manner. Protect important parts from abnormal overheating. [Composition] A combustion controller 7 detects a pan bottom temperature detected when a thermistor 2 at a central portion of a burner head 3 provided in a burner body 4 is brought into contact with a cooking pan 1 depending on whether high temperature cooking or low temperature cooking is performed. Monitoring is performed based on the upper limit temperature selected in step S1, and whether combustion is stopped or continued is controlled depending on whether the upper limit temperature is exceeded or not. When the upper limit temperature is low, the buzzer 9 sounds to notify of overheating. At the same time, it prompts a change to the upper limit temperature of the high temperature, lights the light emitting diode 8 at the upper limit temperature of the high temperature to notify, and automatically returns to the lower limit temperature of the low temperature after a lapse of a certain time from the selection of the upper limit temperature of the high temperature. Sounds the buzzer 9 to prompt reselection of whether or not to continue the high temperature upper limit temperature.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heating cooker such as a table cooker, and more particularly, to a heating cooker having an overheat preventing function for detecting a pot bottom temperature of a cooked food and preventing it from exceeding a predetermined temperature.

[0002]

[Prior art]

 Conventionally, the temperature of the bottom of the cooked food is detected by a thermistor, and if the detected temperature is above a certain temperature, the combustion is stopped to prevent a fire such as tempura or the cooked food is prevented from burning. In order to do so, a heating cooker that weakens the heat and controls the temperature is known. For example, a table stove is equipped with a thermistor that detects the temperature in the burner.The thermistor detects the temperature of the bottom of the cooking pot, and the controller determines whether the detected temperature is above the set upper limit temperature. Controls the opening and closing of passages. In addition, there is also one in which the upper limit temperature can be selectively switched according to the food to be cooked.

FIG. 4 shows a detection temperature range of a conventional heating cooker. The ST characteristic in the figure shows the transition of the temperature detected by the thermistor immediately after ignition. Also, the shaded area represents the allowable temperature range at the low temperature upper limit temperature H0 ° C at which combustion of the heating cooker can be continued. Further, the dotted line portion represents the high temperature upper limit temperature H1 ° C. That is, although the low temperature upper limit temperature H0 ° C. is set to 250 ° C. as a temperature limit at which overheating is expected, the high temperature upper limit temperature H1 ° C. can be selectively switched when high temperature cooking is desired. When the detected temperature ST exceeds the selected upper limit temperature, the combustion is stopped.

In order to prevent overheating which causes a tempura fire or the like, it is desirable to set the low temperature upper limit temperature H0 ° C. to about 250 ° C. On the other hand, with respect to the cooking temperature, cooking is performed at various temperatures depending on the food to be cooked. For example, stir-fried vegetables such as stir-fried vegetables, boiled foods, boiling water, and tempura cooked at a temperature of 250 ° C or lower (hereinafter referred to as low-temperature cooking) will be charred, boiled, and fired with tempura oil. It is convenient for preventing. On the contrary, there are some foods that require a high temperature of 250 ° C or higher (hereinafter referred to as high temperature cooking). For example, for stir-fried foods with a low water content such as fried wieners, or cooked foods that use grill nets such as grilled fish and grilled meat, a high temperature of 250 ° C or higher is required, so the set temperature was kept at 250 ° C. Then the fire will extinguish during cooking and it will be inconvenient. However, in order to enable high-temperature cooking at 250 ° C or higher, it is not possible to uniformly set the upper limit temperature for the purpose of preventing fires such as tempura to an unreasonably high temperature.

Therefore, in the case of cooked food that requires high-temperature cooking, the upper limit temperature can be switched. For example, the low temperature upper limit temperature selection button displays "boiled or oily", and the high temperature upper limit temperature selection button displays "baked" to select the upper limit temperature according to the food. , So that it can be easily done by the user.

[0006]

[Problems to be solved by the device]

 However, in the conventional heating cooker, switching the upper limit temperature sometimes causes inconvenience. For example, when high temperature cooking (for example, stir-fried food such as a wiener) is performed in a state where the low temperature upper limit temperature H0 ° C. is set immediately after ignition, the detected temperature ST reaches the upper limit temperature H0 ° C. and combustion is stopped. Therefore, after the combustion was stopped, it was necessary to ignite again, set the high temperature upper limit temperature H1 ° C, and then perform high temperature cooking.

Further, if the user does not properly select the upper limit temperature according to the food, there is a problem that the original purpose, that is, the prevention of overheating, cannot be appropriately performed according to the food. For example, if the user presses the high temperature upper limit temperature selection button "yakimono" to switch the upper limit temperature to the high temperature side (H0 ° C → H1 ° C) and then shifts to tempura cooking as it is, the low temperature of "boiled or oily" Tempura fire cannot be prevented unless the upper temperature limit selection button is pressed again. Further, in actual cooking, it is often the case that high-temperature cooking and low-temperature cooking are alternately cooked, and sometimes it is forgotten to return to the low-temperature upper limit temperature H0 ° C. In addition, every time the high temperature cooking is changed to the low temperature cooking, the operation of returning to the low temperature upper limit temperature H0 ° C. has been troublesome. Furthermore, if the low temperature upper limit temperature H0 ° C is immediately selected immediately after high temperature cooking, only the upper limit temperature becomes the low temperature upper limit temperature H0 ° C without the detection temperature ST decreasing yet. It was stopped, and inconvenience occurred in terms of usability.

[0008] Alternatively, in order to eliminate such inconvenience, it has been proposed to selectively cancel the overheat control based on the upper limit temperature without adopting the method of switching the upper limit temperature. For example, in the heating cooker disclosed in Japanese Examined Patent Publication No. 5-81804, overheating control is canceled for a certain period of time by a predetermined operation command in the case of high temperature cooking. However, if the overheat control is released for a certain period of time, combustion will not stop even if the temperature rises to an unlimited level due to overheating, and there was a concern that the temperature detection part such as the thermistor could not be protected from the overheat condition. . In other words, if the temperature detector is used while it is broken, the original overheat prevention cannot be achieved. Therefore, it is an object of the heating cooker of the present invention to solve the above problems, to prevent overheating and improve usability, and to protect the temperature detecting unit from high temperatures.

[0009]

[Means for Solving the Problems]

 The heating cooker of the present invention which solves the above-mentioned problems, includes a temperature detecting means for detecting the heating temperature of the food and whether or not the detected temperature ST detected by the temperature detecting section is equal to or higher than a set upper limit temperature H0 ° C. A heating cooker equipped with an upper limit temperature monitoring means for monitoring and a heating control means for stopping heating or reducing the heating amount when the detected temperature ST is judged to be the set upper limit temperature H0 ° C. or higher, The gist of the present invention is to include an upper limit temperature switching means for temporarily switching the set upper limit temperature H0 ° C. to the set upper limit temperature H1 ° C. higher than the set upper limit temperature H0 ° C. by the operation command of.

A second invention is that the heating cooker of the first invention further comprises an informing means for informing that the set upper limit temperature H0 ° C. is switched to the set upper limit temperature H1 ° C. Use as a summary.

A third aspect of the present invention is the heating cooker according to the first aspect of the present invention, wherein the setting upper limit temperature H1 ° C. gives advance notice of return before the set upper limit temperature H0 ° C. returns to the setting upper limit temperature H0 ° C. When the above-mentioned predetermined operation command is received during the advance notice, the set upper limit temperature H1 ° C postpones the return to the set upper limit temperature H0 ° C and the monitoring period is extended based on the set upper limit temperature H1 ° C. It is a gist that it is provided with an extension means.

Further, a fourth invention is, in the heating cooker according to the first invention, when the detected temperature ST is equal to or higher than the upper limit temperature H0 ° C. in a monitoring state based on the set upper limit temperature H0 ° C., The gist of the present invention is to provide an overheat notifying means for notifying overheat and a heating control prohibiting means for prohibiting the control by the heating control means during a period in which the overheat does not continue for a certain time or longer.

[0013]

[Action]

 In the heating cooker according to the first aspect of the present invention, the upper limit temperature switching means temporarily switches the set upper limit temperature H0 ° C. to the set upper limit temperature H1 ° C. higher than the set upper limit temperature H0 ° C. by a predetermined operation command. That is, when the high temperature upper limit temperature is selected during cooking, the set upper limit temperature is set to the high temperature upper limit temperature H1 ° C., and after a certain time has elapsed from the time of selection, the low temperature upper limit temperature H0 ° C. is automatically restored. Therefore, in the case of low-temperature cooking, the operation of returning from the high temperature upper limit temperature H1 ° C to the low temperature upper limit temperature H0 ° C becomes unnecessary, and even if the temperature is not returned to the low temperature upper limit temperature H0 ° C, the high temperature upper limit temperature H1 ° C to It automatically returns to the upper limit temperature H0 ℃. In addition, it automatically returns to the low temperature upper limit temperature H0 ° C, and even if it is a high temperature upper limit temperature H1 ° C, it monitors whether the upper limit temperature H1 ° C or higher, and the temperature detection unit is overheated to a high temperature upper limit temperature H1 ° C or higher. Protect from.

Further, in the heating cooker according to the second aspect, the notifying means notifies that the set upper limit temperature H0 ° C. has been switched to the set upper limit temperature H1 ° C. Therefore, when the low temperature cooking is mistakenly performed with the high temperature upper limit temperature H1 ° C., the user is notified that the high temperature upper limit temperature H1 ° C. is set.

Further, in the heating cooker according to the third aspect of the invention, the notifying means gives notice of the return before the set upper limit temperature H1 ° C. returns to the set upper limit temperature H0 ° C., and a predetermined operation command is received during the notice. In this case, the extension means delays the return from the set upper limit temperature H1 ° C. to the set upper limit temperature H0 ° C. and extends the monitoring period based on the set upper limit temperature H1 ° C. Therefore, if it is absolutely necessary to continue high-temperature cooking, the high-temperature upper limit temperature H1 ° C will be announced before the automatic return to the low-temperature upper-limit temperature H0 ° C. Select the high-temperature upper-limit temperature H1 ° C again. Then, the monitoring period of the high temperature upper limit temperature H1 ° C. is extended and the high temperature cooking is continued.

Further, in the heating cooker according to the fourth aspect, when the detected temperature ST becomes higher than or equal to the upper limit temperature H0 ° C. in the monitoring state based on the set upper limit temperature H0 ° C., the overheat notifying means notifies the overheat. , The heating control prohibiting means prohibits the heating control during the period when the overheating does not continue for a certain time or longer. Therefore, when the high temperature cooking and the low temperature cooking are complicatedly performed, even if the user accidentally shifts to the high temperature cooking while keeping the low temperature upper limit temperature H0 ° C, if the upper temperature limit H0 ° C or higher is reached, the notification is given. The fire will not extinguish if the upper limit temperature H1 ° C of high temperature is selected again. Also, immediately after the high temperature cooking, even if the detected temperature ST does not decrease and reaches the low temperature upper limit temperature H0 ° C., the low temperature upper limit temperature H0 ° C. is not detected and the combustion is not stopped immediately, and the alarm is given first. It does not extinguish the fire and does not cause inconvenience.

[0017]

【Example】

 In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the heating cooker of the present invention will be described below. FIG. 1 is a schematic configuration diagram of a heating cooker as an example. A thermistor 2 for detecting temperature is provided at the center of the burner head 3 provided in the burner body 4. The thermistor 2 is provided so as to be biased upward by a spring (not shown), and is brought into contact with the pan bottom of the cooking pan 1 placed on the burner body to detect the pan bottom temperature. Further, a combustion controller 7 which is electrically connected to the thermistor 2 and receives the electric signal is provided. The combustion controller 7 includes an upper limit temperature monitoring unit 7a that determines whether or not the upper limit temperature is exceeded, a combustion control unit 7b that controls combustion based on the determination result, and a notification drive unit that notifies the upper limit temperature information to the user. 7c is provided. The light emitting diode 8 and the buzzer 9 are connected to the notification drive unit 7c, and a drive signal for lighting and driving them is output. Further, the main solenoid valve 5 and the original electromagnetic valve 6 that open and close the flow path are connected to the combustion control unit 7b, and a control signal that opens and closes the flow path is output.

Further, there is provided an upper limit temperature switching unit 10 for switching and setting the upper limit temperature according to the food to be cooked. For example, when high temperature cooking is required, the setting of the upper limit temperature is switched by pressing the high temperature upper limit temperature selection button 10b of the upper limit temperature switching unit 10 (H0 ° C. → H1 ° C.). Further, when the upper limit temperature switching unit 10 is not operated, the lower limit upper limit temperature H0 ° C. is preferentially set. Further, when it is desired to return from the high temperature upper limit temperature H1 ° C. to the low temperature upper limit temperature H0 ° C., the setting of the upper limit temperature is switched by pressing the low temperature upper limit temperature selection button 10a (H1 ° C. → H0 ° C.).

FIG. 2 shows a flowchart showing the processing of the combustion controller 7 as an embodiment, and FIG. 3 shows the detected temperature range. The characteristic of ST shown in FIG. 3 shows the transition of the detected temperature of the thermistor 2 immediately after ignition, and shows the case where high temperature cooking to low temperature cooking are performed. The shaded area indicates the allowable temperature range in which the heating cooker can continue to burn.If the upper limit temperature is switched to continue high-temperature cooking after switching the upper limit temperature to continue high-temperature cooking, It shows an example of the combination. The switching process of the upper limit temperature will be described based on the flowchart of FIG. When the ignition operation is performed, the combustion controller 7 starts the combustion control in step 1, and sets the low temperature upper limit temperature H0 ° C. in step 2. The low-temperature upper limit temperature H 0 ° C. is set to prevent overheating that causes a tempura fire and the like, and is an upper-limit temperature suitable for low-temperature cooking. The upper limit temperature H0 ° C. of the low temperature satisfying this condition is preferably 250 ° C. Next, if the high temperature upper limit temperature selection button 10b of the upper limit temperature switching unit 10 is not pressed (step 3; NO), monitoring is started as to whether or not the temperature ST detected by the thermistor 2 is equal to or lower than the upper limit temperature H0 ° C. (Step 11). When high temperature cooking is performed, the temperature ST detected by the thermistor 2 may exceed the low temperature upper limit H0 ° C. (a seconds to b seconds in FIG. 3). When the detected temperature ST reaches or exceeds H 0 ° C, the timer starts counting in step 12, and the buzzer 9 sounds for T2 seconds to notify that overheating has occurred. Further, the sound of the buzzer 9 prompts the user to switch to the high temperature upper limit temperature H1 ° C. when performing high temperature cooking while keeping the low temperature upper limit temperature H0 ° C. If there is no switching operation to the high temperature upper limit temperature H 1 ° C. while the buzzer 9 is ringing, it is judged as overheating and the combustion is stopped (step 15). At the same time as extinguishing the fire, the processing such as the timer and buzzer is stopped and released.

On the other hand, in step 12, when the high temperature upper limit temperature selection button 10b is pressed while the buzzer 9 is ringing (at b seconds in FIG. 3), it is determined that the upper limit temperature switching setting has been performed. , Buzzer 9 is stopped (step 13 → step 19). Next, in step 4, the upper limit temperature is switched from H0 ° C to H1 ° C (step 4), and at the same time, the user switches on the high limit temperature H1 ° C by turning on the LED 8 of the light emitting diode. Let us know. The high temperature upper limit temperature H1 ° C. is preferably set to 350 ° C. as an upper limit temperature capable of high temperature cooking and as an upper limit temperature capable of protecting the components of the heating cooker (particularly the temperature detecting portion). Subsequently, in step 5, monitoring is started as to whether the detected temperature ST is equal to or lower than the upper limit temperature H1 ° C. When T1 seconds have passed since the upper limit temperature was switched (step 6) (at c seconds in FIG. 3), the buzzer 9 is driven (step 7). That is, the buzzer 9 informs the user that the high temperature upper limit H1 ° C. selected and switched will soon return to the low temperature upper limit H0 ° C. If the user wants to continue high-temperature cooking by the notification of this buzzer 9, the buzzer 9 can be selected again by selecting the high temperature upper limit temperature H1 ° C (step 9) (at d seconds in FIG. 3). When stopped, the high temperature upper limit temperature H1 ° C. is reset and the time is counted from the beginning (step 10 → step 5) to continue high temperature cooking.

In the case where the high temperature cooking is finished and the low temperature cooking is performed, if the buzzer 9 in Step 7 is left as it is, if it is kept as it is, after the upper limit temperature is switched, T0 seconds (Step 16) elapses, and then Step 17 At, the upper limit temperature returns from H1 ° C to H0 ° C, and the notification of the buzzer 9 and the lamp 8 is stopped (at the time of f second in FIG. 3). Subsequently, if the detected temperature ST is less than H0 ° C in step 18, the process returns to step 3 to continue combustion, and conversely, if the detected temperature ST is H0 ° C or more, it is determined to be overheating, and combustion is performed. Is stopped (step 15). In addition, preferably, the predetermined time T0 seconds for switching to the high temperature upper limit temperature H1 ° C. is 600 seconds, and the predetermined time T1 seconds from the time of switching to the high temperature upper limit temperature H1 ° C. to the start of the advance notice is 595 seconds, Set the ringing time of the buzzer 9 to 5 seconds.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and may be implemented in various modes without departing from the gist of the present invention. Of course. For example, in the combustion controller 7 in the embodiment, the upper limit temperature monitoring unit 7a that determines the information from the temperature detection unit is mainly configured by a microcomputer, but may be configured by a discrete circuit. Further, the heating cooker may be configured to have a temperature adjusting function of keeping the heating temperature of the cooking object within a predetermined temperature range by automatically adjusting the heating power. For example, the control when the upper limit temperature is detected is not limited to stopping combustion, but may be the control of intermittent ignition / extinction in order to keep the heating temperature at a constant temperature. Control may be performed to further reduce the flame. In the heating cooker according to the present embodiment, the combustion controller 7 controls the opening and closing of the main solenoid valve 5 and the original solenoid valve 6 provided in the gas passage, but the magnet safety valve is manually opened. If the temperature above the set upper limit temperature is detected, the magnet safety valve may be de-energized and closed.

Further, the notification means may be various transmission means such as a buzzer, a chime, a light emitting diode, a liquid crystal display, etc., as long as they can transmit the information to the eyes or the auditory sense. Also, when T1 seconds have elapsed after switching the upper limit temperature to H1 ° C., the buzzer 9 sounds to notify that the upper limit temperature H0 ° C., which is a predetermined low temperature, will soon be returned, but the temperature ST detected by the thermistor 2 is If the temperature is already below H0 ° C, the upper limit temperature H0 ° C will not be detected and the fire will not be extinguished, so the buzzer 9 may be turned off. In addition, the buzzer 9 sounds during the period from T1 seconds to T0 seconds to prompt switching of the upper limit temperature, but the switching setting is the upper limit of high temperature regardless of the period from T1 seconds to T0 seconds. The upper limit temperature may be switched by pressing the temperature selection button 10b.

Further, in the flowchart of FIG. 2, the configuration may be such that the process of step 18 is not performed and the process returns from step 17 to step 3 at once. That is, in the case of the low temperature upper limit temperature H0 ° C., even if H0 ° C. or higher is detected, the fire is not extinguished until after T2 seconds have passed, and an opportunity to continue by selecting the high temperature upper limit temperature H1 ° C. may be provided. . If the temperature ST detected by the thermistor 2 is lower than or equal to the upper limit temperature H 0 ° C of the low temperature by the time T2 seconds elapses, the buzzer 9 is stopped without selecting the new upper limit temperature H 1 ° C of the high temperature. The combustion may be continued.

Further, the switching setting of the upper limit temperature is not limited to being performed only after ignition, and the switching setting may be performed in advance even before ignition. Further, the number of high temperature upper limit temperatures H1 ° C to be switched by selecting the upper limit temperature may be selected and switched from two or more upper limit temperatures, or the temperature value itself may be designated without any step. It may be temperature control.

[0026]

[Effect of device]

 As described above in detail, according to the heating cooker of the first invention, even if low-temperature cooking is performed with the high-temperature upper limit temperature H 1 ° C. set, the low-temperature upper-limit temperature H 0 ° C. prevents tempura fire. It is safe because it returns automatically. Further, it is eliminated from the troublesome operation of returning from the high temperature upper limit temperature H1 ° C. to the low temperature upper limit temperature H0 ° C. Further, since the temperature is monitored even when the high temperature cooking is performed at the high temperature upper limit H1 ° C., the components of the heating controller (particularly the temperature detecting portion) are protected from abnormal overheating. Further, according to the heating cooker of the second invention, when the low temperature cooking is mistakenly performed with the high temperature upper limit temperature H1 ° C. being informed, the user is informed of the high temperature upper limit temperature H1 ° C. Therefore, it is safe because it informs you that the upper limit temperature H0 ℃ should be kept low to prevent tempura fire. Further, according to the heating cooker of the third invention, when it is desired to continuously perform high temperature cooking, the high temperature upper limit temperature H1 ° C. is continued by reselecting the high temperature upper limit temperature H1 ° C. Therefore, even if it is cooked for a long time at high temperature, there is no inconvenience of extinguishing the fire unexpectedly. Further, according to the fourth heating cooker, even if the high temperature cooking and the low temperature cooking are performed intricately and the low temperature upper limit temperature H0 ° C. is exceeded, the change to the high temperature upper limit temperature H1 ° C. is promoted. The inconvenience of extinguishing the fire suddenly does not occur. Therefore, according to the heating cooker of the present invention, overheating that causes a fire of tempura, etc. is prevented, no inconvenience in use occurs even if it is a complicated cooking such as high temperature cooking and low temperature cooking, and an important part of the heating cooker. Protect (especially the temperature detector) from abnormal overheating.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a heating cooker as one embodiment.

FIG. 2 is a flowchart according to an embodiment of the present invention.

FIG. 3 is a graph showing a relationship between a temperature range and time according to an embodiment of the present invention.

FIG. 4 is a graph showing a relationship between a temperature range and time according to a conventional heating cooker.

[Explanation of symbols]

 2 Thermistor 7 Combustion controller 8 Lamp 9 Buzzer 10 Upper temperature switching part

Claims (4)

[Scope of utility model registration request] 1. A temperature detecting means for detecting a heating temperature of cooked food, and an upper limit temperature monitoring means for monitoring whether or not a detected temperature ST detected by the temperature detecting portion is equal to or higher than a set upper limit temperature H0 ° C. When it is determined that the detected temperature ST is equal to or higher than the set upper limit temperature H0 ° C., in the heating cooker including the heating control means for stopping the heating or reducing the heating amount, the set upper limit is given by a predetermined operation command. A heating cooker comprising an upper limit temperature switching means for temporarily switching the temperature H0 ° C. to a set upper limit temperature H1 ° C. higher than the set upper limit temperature H0 ° C. 2. The heating cooker according to claim 1, further comprising informing means for informing that the set upper limit temperature H0 ° C. has been switched to the set upper limit temperature H1 ° C. 3. A notifying means for notifying the return of the set upper limit temperature H1 ° C. before the set upper limit temperature H1 ° C. is returned to the set upper limit temperature H0 ° C., and when the predetermined operation command is received during the notice,
The overheating according to claim 1, further comprising: an extension unit that delays the return of the set upper limit temperature H1 ° C to the set upper limit temperature H0 ° C and extends a monitoring period based on the set upper limit temperature H1 ° C. Cooking device. 4. The detected temperature ST is the set upper limit temperature H.
When the upper limit temperature H0 ° C. or higher is reached in the monitoring state based on 0 ° C., an overheat notification means for notifying overheating, and a heating control prohibition for prohibiting control by the heating control means during a period in which the overheating does not continue for a certain time or more. The cooking device according to claim 1, further comprising: