JP4887309B2 - Stove - Google Patents

Description

  The present invention relates to a stove that enables prevention of ignition during cooking using a small amount of oil by preventing a large overshoot in the temperature of the cooking container to be heated. It is designed to eliminate the lack of firepower.

Japanese Patent Application Laid-Open No. 2004-228688 discloses a stove that can prevent ignition during cooking using a small amount of oil by preventing the temperature inside the heated cooking vessel from overshooting greatly.
In this thing, the temperature sensor which detects the bottom wall temperature of a cooking vessel, and the gas burner which can switch a thermal power in two steps, a large fire and a small fire, are comprised. At the time of cooking, as shown in FIG. 6, the gas burner is switched from a large fire to a small fire at a target upper limit temperature (Ts + α) centered on a target temperature Ts suitable for cooking of ingredients, while a target lower limit temperature (Ts− In α), a small fire is switched to a large fire, and thereby temperature control is performed such that the temperature detected by the temperature sensor is maintained between the target upper limit temperature (Ts + α) and the target lower limit temperature (Ts−α). . In the initial heating control before the temperature control is started, the gas burner is set to a large fire to start heating, and the temperature detected by the temperature sensor is lower than the target lower limit temperature (Ts-α). When TF is reached (point Q), the heating power is switched to a small fire. Note that the temperature drop at point R in FIG. 6 is caused by the fact that additional ingredients are added to the cooking container after the thermal power has been switched to a small fire at point Q. Further, overshoot is continued to some extent without temperature drop at the point R.

In the conventional stove, at the time of initial heating, the gas burner is set to a large fire to start heating, and when the detected temperature of the temperature sensor reaches a switching temperature TF lower than the target temperature Ts, the fire is switched to a small fire (point Q). Therefore, as in the case of simple heating with a large fire up to the target upper limit temperature (Ts + α), the target upper limit temperature (Ts + α) is not greatly overshot and the inside of the cooking container is ignited during cooking using a small amount of oil. It is possible to realize a function (ignition prevention function) for preventing the above.
JP 2000-88242 A

However, the above conventional one has the following problems.
That is, in the above-mentioned conventional one, when cooking using a small amount of oil is performed, the temperature in the cooking container greatly overshoots even if the heating power is switched to a small fire at the switching temperature TF.

  For this reason, in order to increase the accuracy of the ignition prevention function in cooking using a small amount of oil, by setting the switching temperature TF low, the temperature in the cooking container during overshoot after the temperature is raised to the switching temperature TF is set. It is effective to suppress the temperature as much as possible. On the other hand, if the temperature difference between the switching temperature TF and the target temperature Ts is too large, there is no difference in the amount of overshoot from the case of continuous heating toward the target temperature Ts while maintaining a large fire without switching to a small fire at the switching temperature TF. The difference between the switching temperature TF and the target temperature Ts needs to be reduced. For this reason, it is necessary to set the target temperature Ts low as the switching temperature TF is set low.

However, if the target temperature Ts is set low together with the switching temperature TF, the cooking container is not heated sufficiently when the amount of cooking is large, particularly when performing high temperature cooking such as frying with a frying pan. There was a problem of giving a lack of firepower.
The present invention has been made in view of such points.
“A temperature sensor that detects the temperature of the cooking container,
A heating source for heating the cooking vessel;
Comprising target temperature control means for controlling the output of the heating source so that the detected temperature TH of the temperature sensor can be maintained substantially at the target temperature Ts;
Before the target temperature control means executes the control, the output of the heating source is maintained at a high output, and when the detected temperature TH of the temperature sensor reaches a switching temperature Ta, the output is switched to a low output and maintained for a predetermined time. A stove where initial heating control is performed,
To provide a stove that can eliminate the feeling of insufficient heating when the amount of cooking is large, while preventing ignition during cooking using a small amount of oil by preventing the temperature in the cooking container from overshooting greatly. Let it be an issue.

[Invention of Claim 1]
The solution means of the invention according to claim 1 for solving the above-mentioned problem is
“A temperature comparison means is provided for outputting a large heating request signal when the detected temperature TH of the temperature sensor has not increased to a predetermined temperature lower than the target temperature Ts after completion of the initial heating control.
When the large heating request signal is output, the detection temperature of the temperature sensor is detected by performing slow heating control that switches to a small output after maintaining the output of the heating source at a large output one or more times. Controlling the heating source such that TH is raised stepwise toward the target temperature Ts ;
A high cut temperature for preventing overheating is set for each of the initial heating control and the slow heating control, and when the detected temperature TH of the temperature sensor becomes equal to or higher than the high cut temperature, the heating source is forcibly stopped. ,
Among the initial heating control and each slow heating control executed once or a plurality of times, the high cut temperature set for the control executed later than the high cut temperature set for the control executed first. Is set to a high temperature .
The operation of the above solution will be described with reference to FIG.
In the previous stage where the heating source is controlled so that the detected temperature TH of the temperature sensor is substantially maintained at the target temperature Ts, the initial heating control is started and the output of the heating source is large as in the conventional case described above. Maintained. In this state, when the detection temperature TH of the temperature sensor that detects the temperature of the cooking container is raised to the switching temperature Ta, the output of the heating source is maintained for a predetermined time in a state in which the output is switched to a small output, whereby initial heating control is performed. Ends.

Next, when the initial heating control is completed, the temperature comparing means compares a predetermined temperature (for example, Tx) lower than the target temperature Ts with a detected temperature TH of the temperature sensor, and the latter detected temperature TH is the former predetermined temperature. When the temperature has not been increased, a large heating request signal indicating that the cooking container needs to be further heated is output. Then, in response to the large heating request signal, the slow heating control for switching to the small output after maintaining the output of the heating source at the large output is executed once or a plurality of times. As a result, the detected temperature TH of the temperature sensor gradually increases in steps toward the target temperature Ts, and even if the target temperature Ts is set high, the inside of the cooking container exceeds the target temperature Ts. Therefore, it is possible to eliminate a feeling of insufficient heating when the amount of cooking is large while preventing ignition during cooking using a small amount of oil.
When the initial heating control or each slow heating control is executed, the heating source is forcibly stopped when the detected temperature TH of the temperature sensor becomes equal to or higher than the high-cut temperature for preventing overheating, thereby preventing overheating in the cooking container. In this case, since the high cut temperature set for the control executed later is higher than the high cut temperature set for the control executed earlier, the detected temperature TH of the temperature sensor is directed toward the target temperature Ts. As the temperature rises stepwise, the high cut temperature also becomes high, and a high cut temperature suitable for the degree of progress of heating the cooking container is set.

[Invention of Claim 2]
In the invention according to claim 1,
“The slow heating control is performed by switching to a small output for a predetermined time when the detected temperature TH of the temperature sensor rises to a predetermined temperature lower than the target temperature Ts after maintaining the output of the heating source at a high output, In the case of “increasing stepwise toward the target temperature Ts”, when the detected temperature TH of the temperature sensor rises to a predetermined temperature after entering the slow heating control, the output of the heating source is changed from a large output to a predetermined time. Control for switching to small output is executed, and thereby control for increasing the temperature stepwise toward the target temperature Ts is executed. Therefore, unlike the control for switching to the small output after maintaining the large output for a predetermined time, the accuracy of the control until the temperature is raised to the target temperature Ts can be improved.

The present invention has the following specific effects.
As described above, even if the target temperature Ts is set high, the inside of the cooking container does not greatly overshoot beyond the target temperature Ts, so that ignition is prevented during cooking using a small amount of oil. The feeling of insufficient heating when the amount of cooking is large can be eliminated.

Moreover, even if the target temperature Ts is set high, the inside of the cooking container does not greatly overshoot beyond the target temperature Ts, so that the overshoot is greatly reduced in temperature like a cooking container processed with Teflon (registered trademark). Heating suitable for using a cooking container having a time-consuming structure can be performed.
Further, as the detected temperature TH of the temperature sensor gradually increases toward the target temperature Ts, the high cut temperature also becomes high, so a high cut temperature suitable for the degree of progress of heating of the cooking container is set. .

  In the invention according to the second aspect, as described above, the temperature can be raised while heating while performing the temperature management in the cooking vessel, so that the control accuracy until the temperature is raised to the target temperature Ts can be improved.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a drop-in stove that is mounted in a state of being dropped into an opening (K1) opened in a countertop (K) of a system kitchen.
The top plate (30) of the stove body (3) is provided with five virtues (33), (34) and (35), and at the center of the gas burners (31), (32) and (36) facing below Temperature sensors (41), (42), and (43) are provided for contacting the bottom surface of the cooking container to be heated and detecting its temperature. Further, a door (21) of the grill (2) is disposed at the front center of the stove body (3).

  The stove control section (23) on the right side of the door (21) is provided with operation knobs (24), (25) and (28) that have both the function of turning on and off the gas burners (31), (32) and (36) and adjusting the thermal power. The operation knobs (24), (25), and (28) are used in a state where they protrude from the stove operation section (23) due to repeated pushing operations, and are not flush with the stove operation section (23). It changes to two states with use state. Further, below the operation knobs (24), (25) and (28), there is provided a drawer-type operation section (39) for setting various cooking modes such as boiling water, stewing, fried food, tempura and the like.

On the other hand, a grill knob (37) is provided in the grill operation section (22) formed on the left side of the door (21) of the grill (2).
The control device (not shown) of the stove body (3) stores a microcomputer in which a control program having the contents shown in the flowcharts of FIGS.

  Hereinafter, according to the graphs of FIGS. 2 to 4 and FIG. 5, the cooking operation of the drop-in stove according to the present embodiment will be described. In the following, description will be made by taking as an example an operation when high-temperature cooking such as fried food is performed while heating a frying pan as a cooking container with a gas burner (31).

  In the present embodiment, the first range (L1) of steps (ST1) to (ST18) in FIGS. 2 to 4, the second range (L2) of steps (ST19) to (ST26) (ST31), and The third range (L3) of steps (ST28) to (ST30) (ST32) to (ST35) (ST39) and the fourth range (L4) of steps (ST36) to (ST38) (ST40) to (ST45) Furthermore, the control process is divided into the fifth range (L5) of steps (ST46) to (ST50).

  Now, when the fried food mode is selected by the operation unit (39) and the ignition operation is then performed by the operation knob (24), the microcomputer of the control device firstly performs steps (ST1) to (ST18) in FIG. The control process of the 1st range (L1) shown in FIG.

* First range (L1)
First, step (ST1) is executed to ignite the gas burner (31), and the heating power of the gas burner (31) is set to a large fire with a large output.
Next, in step (ST2), the switching temperature Ta for switching the heating power of the gas burner (31) to a small fire with a small output in order to suppress the heating of the frying pan (the temperature that serves as a comparison reference for the detected temperature TH of the temperature sensor (41)) To decide. This switching temperature Ta is determined to be 170 ° C., 185 ° C., 200 ° C., 210 ° C. or the like according to the rising gradient of the detected temperature TH of the temperature sensor (41) in the early stage of combustion of the gas burner (31). It has become.

In the following, a case where the switching temperature Ta is determined to be 170 ° C. will be described as an example.
Next, when it is determined in step (ST3) that the detected temperature TH of the temperature sensor (41) has risen to the switching temperature Ta (170 ° C. in this example), the heating power of the gas burner (31) is determined in step (ST4). Is switched to small fire (small output) (point A in FIG. 5). Then, immediately after switching the heating power to a small fire, the detected temperature TH of the temperature sensor (41) for detecting the temperature of the frying pan does not immediately decrease, and the detected temperature TH starts to overshoot. Thereafter, in order to measure the duration of the small fire (hereinafter referred to as “small fire time”), the small fire time timer T1 is reset (see step (ST5)).

  Next, in step (ST6), it is monitored that the measurement time of the small fire time timer T1 reaches 35 seconds, which is a predetermined time, and if it is less than 35 seconds, it is determined whether or not new food is put into the frying pan. Therefore, in step (ST7), it is monitored that the detected temperature TH of the temperature sensor (41) is rapidly lowered. If it is determined in step (ST7) that the detected temperature TH of the temperature sensor (41) is equal to or higher than the “switching temperature Ta-3 ° C.” (170 ° C.−3 ° C. = 167 ° C. in this example), If it is determined that no new food has been introduced, and in such a case, step (ST8) is executed, and if it is further determined that the detected temperature TH has not been raised to the high cut temperature of 245 ° C., the control is performed again. Returned to (ST6). On the other hand, when step (ST8) is executed, if it is determined that the detected temperature TH of the temperature sensor (41) has exceeded the high cut temperature of 245 ° C, the gas burner (31) is extinguished in step (ST9) and is in a safe state. Secure. Therefore, even if control is performed to switch the gas burner (31) to a small fire in the step (ST4), even if the actual heating power does not switch to a small fire, the cooking container will be at an abnormally high temperature that exceeds the high cut temperature. The gas burner (31) can be extinguished early before it becomes.

  On the other hand, when it is determined that new food is put into the frying pan when the step (ST7) is executed (when TH <(Ta−3 ° C.)), the second range (L2) described later is controlled. Shifts to step (ST19), and the heating power of the gas burner (31) is returned to a large fire.

  On the other hand, if it is determined that the measurement time of the small fire time timer T1 exceeds 35 seconds when the step (ST6) is executed, the detected temperature TH of the temperature sensor (41) is further set to “ Switching temperature Ta + 30 ° C. ”(in this example, it is 200 ° C. and corresponds to“ predetermined temperature lower than target temperature Ts ”, which is the specific matter of the invention described above). In (ST19), the heating power of the gas burner (31) is returned to a large fire (point B in FIG. 5). Therefore, in the present embodiment, the functional unit of the microcomputer that branches the control from step (ST10) to step (ST19) corresponds to “temperature comparison means” that is a specific matter of the invention described above.

  After executing step (ST19), the detected temperature TH of the temperature sensor (41) rises to 230 ° C. which is the heating control temperature in the second range (L2) described later in step (ST21) of FIG. When the temperature rises to 230 ° C., the heating power of the gas burner (31) is switched to a small fire (the same heating power as that of step (ST4)) in step (ST22) (point C in FIG. 5). In the present embodiment, the control in steps (ST19) to (ST22) corresponds to the “slow heating control” which is the specific matter of the invention described above.

Next, the description returns to step (ST10).
In step (ST10), when it is determined that the detected temperature TH of the temperature sensor (41) is equal to or higher than the “switching temperature Ta + 30 ° C.” (200 ° C. in this example), the heating power of the gas burner (31) is maintained at a small fire. In the state, in step (ST11), it is monitored that the measurement time of the small fire time timer T1 reaches 45 seconds which is a predetermined time. If the time is less than 45 seconds, the control of steps (ST12) and (ST13) similar to steps (ST7) and (ST8) described above is executed.

  On the other hand, if it is determined in step (ST11) that the measurement time of the small fire time timer T1 has become 45 seconds or more, in step (ST14), the detected temperature TH of the temperature sensor (41) is “switching temperature Ta + 40 ° C.” ( In this example, the temperature is 210 ° C., which corresponds to the “predetermined temperature lower than the target temperature Ts”, which is a specific matter of the invention described above. And when it is judged that it is less, the thermal power of a gas burner (31) is returned to a big fire at step (ST19) mentioned later. Therefore, in the present embodiment, the functional unit of the microcomputer that branches the control from step (ST14) to step (ST19) corresponds to the “temperature comparison means” that is the specific matter of the invention described above.

  If it is determined in step (ST14) that the detected temperature TH of the temperature sensor (41) is equal to or higher than “switching temperature Ta + 40 ° C.” (210 ° C. in this example), the small fire time timer T1 is set in step (ST15). Monitor the measurement time of 55 seconds. If the time is less than 55 seconds, the control of steps (ST16) and (ST17) similar to steps (ST7) and (ST8) described above is executed.

  On the other hand, it is determined in step (ST15) that the measurement time of the small fire time timer T1 has become 55 seconds or more, and in step (ST18), the detected temperature TH of the temperature sensor (41) is 230 ° C. If it is determined that the temperature is lower than the “predetermined temperature lower than the target temperature Ts”, the control operation proceeds to the second range (L2) step (ST19) described later. In the present embodiment, the functional unit of the microcomputer for branching control from step (ST18) to step (ST19) corresponds to “temperature comparison means” which is the specific matter of the invention described above.

  Also, control of steps (ST1) to (ST6), steps (ST1) to (ST6) (ST10) (ST11), and steps (ST1) to (ST6) (ST10) (ST11) (ST14) (ST15) Each corresponds to “initial heating control” which is a specific matter of the invention described above. )

* Second range (L2)
In the second range (L2), first, in step (ST19), the heating power of the gas burner (31) is returned to a large fire. Then, in step (ST21) in FIG. 3, the temperature TH detected by the temperature sensor (41) is monitored to rise to 230 ° C., which is the heating control temperature in the second range (L2). In step (ST22), the heating power of the gas burner (31) is switched to a small fire.

  After the thermal power of the gas burner (31) is switched to a small fire in step (ST22) and after the detected temperature TH of the temperature sensor (41) is determined to be 230 ° C. or higher in step (ST18) of FIG. Resets the small fire time timer T1 in step (ST23) of FIG.

  While it is determined in step (ST24) that the measurement time of the small fire time timer T1 is less than 20 seconds, the heating power of the gas burner (31) is set to small fire, and steps (ST25) (ST26) Is repeated, and it is determined whether or not the detected temperature TH of the temperature sensor (41) is in the range of 226 ° C. which is the heating control temperature in the second range (L2) to 260 ° C. which is the high cut temperature. If the high cut temperature is 260 ° C. or higher, the gas burner (31) is extinguished in step (ST27).

  On the other hand, if it is determined in step (ST25) that the detected temperature TH of the temperature sensor (41) is less than 226 ° C, the control process proceeds to step (ST28) of the third range (L3), and the thermal power of the gas burner (31). Is returned to a big fire.

  Also, if it is determined in step (ST24) that the measurement time of the small fire time timer T1 has reached 20 seconds, the detected temperature TH of the temperature sensor (41) is 245 ° C in step (ST31). It is determined whether or not it has reached the “predetermined temperature lower than the target temperature Ts”). If not, the process proceeds to the step (ST28) of the third range, and the thermal power of the gas burner (31) is It is returned to the big fire (point D in FIG. 5).

  In the present embodiment, the functional unit of the microcomputer that branches the control from step (ST31) to step (ST28) corresponds to “temperature comparison means” that is a specific matter of the invention described above.

* Third range (L3)
In the third range (L3), first, in step (ST28), the heating power of the gas burner (31) is returned to a large fire. When it is determined in step (ST29) that the detected temperature TH of the temperature sensor (41) has been raised to 245 ° C., which is the heating control temperature in the third range (L3), the gas burner (ST30) Switch the fire power of 31) to a small fire (point E in FIG. 5). In the present embodiment, the control in steps (ST28) to (ST30) corresponds to “slow heating control” which is a specific matter of the invention described above.

  If it is determined in step (ST31) of the second range (L2) that the detected temperature TH of the temperature sensor (41) is 245 ° C. or higher, the small fire time timer T1 is reset in step (ST32). Then, when it is determined that the measured time of the small fire time timer T1 is less than 25 seconds (step (ST33)), the control of the steps (ST34) and (ST35) similar to the steps (ST25) and (ST26) described above are executed. To do. The heating control temperature in the third range determined in step (ST34) is set to 241 ° C., and the high cut temperature determined in step (ST35) is set to 275 ° C.

When it is determined in step (ST34) that the detected temperature TH of the temperature sensor (41) is less than 241 ° C. which is the heating control temperature in the third range (L3), the control operation shifts to the fourth range (L4). .
If it is determined in step (ST33) that the measurement time of the small fire time timer T1 has reached 25 seconds, the detected temperature TH of the temperature sensor (41) is 255 ° C. in step (ST39). It is determined whether or not it has reached the “predetermined temperature lower than the target temperature Ts”). If not, the process proceeds to the step (ST36) of the fourth range, and the thermal power of the gas burner (31) is It is returned to the big fire (point F in FIG. 5).
In the present embodiment, the functional unit of the microcomputer that branches the control from step (ST39) to step (ST36) corresponds to “temperature comparison means” that is a specific matter of the invention described above.

* 4th range (L4)
In the fourth range (L4), first, in step (ST36), the heating power of the gas burner (31) is returned to a large fire. When it is determined in step (ST37) that the detected temperature TH of the temperature sensor (41) has been raised to 255 ° C., which is the heating control temperature in the fourth range (L4), the gas burner (ST38) Switch the fire power of 31) to a small fire (point G in FIG. 5). In the present embodiment, the control in steps (ST36) to (ST38) corresponds to the “slow heating control” which is the specific matter of the invention described above.

If it is determined in step (ST39) of the third range (L3) that the detected temperature TH of the temperature sensor (41) is 255 ° C. or more, the small fire time timer T1 is reset in step (ST40) of FIG. The And when it is judged that the measurement time of the small fire time timer T1 is less than 50 seconds (step (ST41)), the control of the steps (ST42) and (ST43) similar to the above-described steps (ST25) and (ST26) is executed. To do. The heating control temperature determined in step (ST42) is set to 251 ° C., and the high cut temperature determined in step (ST43) is set to 285 ° C.
If it is determined in step (ST42) that the detected temperature TH of the temperature sensor (41) is less than 251 ° C., which is the heating control temperature in the fourth range (L4), the control operation shifts to the fifth range (L5). .

On the other hand, when step (ST41) is executed, it is determined that the measurement time of the small fire time timer T1 has reached 50 seconds, and the detected temperature TH of the temperature sensor (41) is 265 ° C. in step (ST44). When it is determined as above, the detected temperature TH is monitored to decrease to 261 ° C. (step (ST45)), and then the control operation shifts to the step (ST46) of the fifth range (L5) and the gas burner ( The firepower of 31) is returned to the big fire. On the other hand, when it is determined in step (ST44) that the detected temperature TH of the temperature sensor (41) has not reached 265 ° C. (corresponding to the “predetermined temperature lower than the target temperature Ts”, which is the specific matter of the invention described above). Then, the control operation is shifted to the step (ST46) of the fifth range (L5), and the heating power of the gas burner (31) is returned to the large fire (point H in FIG. 5).
In the present embodiment, the functional unit of the microcomputer that branches the control from step (ST44) to step (ST46) corresponds to “temperature comparison means” that is a specific matter of the invention described above.

* 5th range (L5)
In the fifth range (L5), first, in step (ST46), the heating power of the gas burner (31) is returned to a large fire.
Next, the heating power of the gas burner (31) is maintained at a high level until the detected temperature TH of the temperature sensor (41) rises to 265 ° C., which is the upper limit of the target temperature Ts (steps (ST46) (ST47)). When the detected temperature TH rises to 265 ° C., the heating power of the gas burner (31) is reduced to a small fire in step (ST48) (point I in FIG. 5). Thereafter, it is determined whether or not the detected temperature TH is within the range of 261 ° C. to 295 ° C. (high cut temperature in the fifth range (L5)), which is the lower limit of the target temperature Ts (steps (ST49) (ST50)). When the temperature is lower than 261 ° C. (point J in FIG. 5), the control is returned to step (ST46). As is clear from the above, in the present embodiment, the temperature between 265 ° C. and 261 ° C., which is the criterion for determination in steps (ST47) and (ST49), corresponds to the target temperature Ts that is the invention specific matter. Yes.

On the other hand, when it is confirmed in step (ST50) that the detected temperature TH has exceeded the high cut temperature of 295 ° C., the gas burner (31) is extinguished in step (ST51).
In this case, in the previous stage where the gas burner (31) is controlled so that the detected temperature TH of the temperature sensor (41) is substantially maintained at the target temperature Ts (the temperatures at points J to I in FIG. 5), Similar to the above, initial heating control (control of steps (ST1) to (ST6) in FIG. 2) is executed, and the gas burner (3) is maintained at a large fire. When the detected temperature TH of the temperature sensor (41) for detecting the temperature of the cooking container rises to the switching temperature Ta, the gas burner (31) is switched to a small fire (point A in FIG. 5) and maintained for a predetermined time. (Step (ST6)), thereby completing the initial heating control (Steps (ST1) to (ST6)).

  Next, when the initial heating control (steps (ST1) to (ST6)) is completed, the temperature comparison means (step (ST10)) is operated with a predetermined temperature (Ta + 30 ° C.) below the target temperature Ts and a temperature sensor (41). When the latter detected temperature TH is not increased to the predetermined temperature of the former, a large heating request signal indicating that the cooking container needs to be further heated is output (step (ST10 ) To (ST19)). Then, in response to the large heating request signal, the slow heating control (steps (ST19) to (ST22), (ST28) to (ST30), (ST36)) for switching to a small fire after maintaining the gas burner (31) at a large fire. To (ST38) etc. are executed once or a plurality of times. As a result, the detected temperature TH of the temperature sensor (41) gradually increases in steps toward the target temperature Ts (between 261 and 265 ° C.), and even if the target temperature Ts is set high. In addition, the inside of the cooking container does not overshoot over the target temperature Ts, and it is possible to eliminate the feeling of insufficient heating when the amount of cooking is large while preventing ignition during cooking using a small amount of oil. .

  Moreover, even if the target temperature Ts is set high, the inside of the cooking container does not greatly overshoot beyond the target temperature Ts, so that the overshoot is greatly reduced in temperature like a cooking container processed with Teflon (registered trademark). Heating suitable for using a cooking container having a time-consuming structure can be performed.

Further, as the detected temperature TH of the temperature sensor (41) gradually increases toward the target temperature Ts, the high cut temperature also becomes higher (260 ° C. in step (ST26), and step (ST35) 275 [deg.] C., step (ST43) 285 [deg.] C.), a high cut temperature suitable for the degree of progress of heating the cooking container is set.
In the above embodiment, the gas burner is used as the heating source of the stove, but an electric heater or an electromagnetic heating coil may be used instead.

  Further, in the above embodiment, the control for switching to the small fire in step (ST4) is performed using the switching temperature Ta determined in step (ST2) as a criterion, but the following control may be performed. That is, the temperature rising time from the temperature 20 ° C. lower than the switching temperature Ta to the switching temperature Ta is measured, and if the temperature rising time is within 30 seconds, it is switched to a small fire in step (ST4), but exceeds 30 seconds. If you keep it on a big fire. Thereafter, similarly, the temperature rise time from 210 ° C. to 230 ° C. is measured, and if the temperature rise time until the temperature rise time reaches 230 ° C. is within 30 seconds, the heating power of the gas burner (31) is reduced. On the other hand, if it exceeds 30 seconds, keep it on a large fire. Then, while monitoring the time when the detected temperature TH of the temperature sensor (41) rises by 20 ° C. from before the predetermined temperature in this way, by controlling the heating power of the gas burner (31) to a small fire, Increase the temperature step by step. The temperature in the cooking vessel gradually rises not in cooking using small amounts of oil, but in cases where the amount of cooking is large. By performing the above control, ignition during cooking using small amounts of oil This can be prevented and a feeling of insufficient heating can be prevented.

The perspective view of the drop-in stove which concerns on embodiment of this invention Flowchart for controlling a drop-in stove according to an embodiment of the present invention Flowchart for controlling a drop-in stove according to an embodiment of the present invention Flowchart for controlling a drop-in stove according to an embodiment of the present invention Graph of temperature detected by temperature sensor (41) Illustration of conventional example

Explanation of symbols

(3) Stove body
(31) (32) (36) ・ ・ ・ Gas burner
(41) ... Temperature sensor

Claims (2)

A temperature sensor for detecting the temperature of the cooking container;
A heating source for heating the cooking vessel;
Comprising target temperature control means for controlling the output of the heating source so that the detected temperature TH of the temperature sensor can be maintained substantially at the target temperature Ts;
Before the target temperature control means executes the control, the output of the heating source is maintained at a high output, and when the detected temperature TH of the temperature sensor reaches a switching temperature Ta, the output is switched to a low output and maintained for a predetermined time. A stove where initial heating control is performed,
A temperature comparison means is provided for outputting a large heating request signal when the detected temperature TH of the temperature sensor has not increased to a predetermined temperature lower than the target temperature Ts after the completion of the initial heating control,
When the large heating request signal is output, the detection temperature of the temperature sensor is detected by performing slow heating control that switches to a small output after maintaining the output of the heating source at a large output one or more times. Controlling the heating source such that TH is raised stepwise toward the target temperature Ts ;
A high cut temperature for preventing overheating is set for each of the initial heating control and the slow heating control, and when the detected temperature TH of the temperature sensor becomes equal to or higher than the high cut temperature, the heating source is forcibly stopped. ,
Among the initial heating control and each slow heating control executed once or a plurality of times, the high cut temperature set for the control executed later than the high cut temperature set for the control executed first. The stove is set to a high temperature . In the stove according to claim 1,
The slow heating control is performed by switching to a small output for a predetermined time when the detected temperature TH of the temperature sensor rises to a predetermined temperature lower than the target temperature Ts after maintaining the output of the heating source at a high output. A stove that raises the temperature stepwise toward the target temperature Ts.

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