JPH02146426A - Heating cooking utensil - Google Patents

Abstract

PURPOSE:To raise the temperature to a preset temperature promptly and minimize a temperature ripple by installing a control means which changes over and sets a caloric value of a heater in response to an open air when the setting temperature is low, and changing the on/off duty ratio of the heater when change over setting is called for. CONSTITUTION:When an outside temperature is 10 deg.C and below according to temperature information of an outside temperature sensor 10 designed to detect the outside temperature, a lower heater is adapted to carry out on/off heating operation in a pattern 1 based on a duty ratio of 1 second ON and 3 seconds OFF. When the outside temperature exceeds 10 deg.C but does not exceed 20, the lower heater is adapted to carry out ON/OFF heating operation based on a duty ratio of 0.5 second ON and 3.5 seconds OFF. When the outside temperature exceeds 20 deg.C, the lower heater 8 is designed to carry out ON/OFF heating operation based on a duty ratio of 0.3 second ON and 3.7 seconds OFF. Therefore, the caloric value of the lower heater 8 can be changed over the set in response to the outside temperature. When the outside temperature does not exceed 10 deg.C, this construction controls the temperature in a cooking chamber 4 with a relatively large caloric value based on the pattern 1 and can raise the temperature to the setting temperature of 36 deg.C promptly.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention is a heating device which is suitable for use when the temperature inside the cooking chamber is controlled to be low, such as when food is thawed and fermented. !
This is related to I-physics equipment.

(Prior Art) Recently, it has been attempted to produce bread by automatically performing the steps of thawing, fermentation, and baking of frozen bread dough using a barrel oven toaster. In this case, heaters are installed in the top and bottom of the toaster body, which is the main body of the ri'J equipment, as well as an internal temperature sensor, and during the thawing and fermentation processes, the bottom heater is operated at a constant duty ratio. The heating and heating stops are repeated based on the temperature detection by the internal temperature sensor while reducing the amount of heat generated by turning the power on and off at the 8 cooking chambers to a low first set temperature (e.g. 36°C). In the baking process, the upper and lower heaters are energized to perform heating and heating stop 1 based on the temperature detected by the internal temperature sensor.
- is repeated to control the inside of the cooking chamber to a high second set temperature (for example, 150° C.).

(Problem to be Solved by the Invention) Since the cooking chamber of a toaster oven has a relatively small volume, the heat dissipation area of the oven body is large compared to 04, and therefore the temperature inside the cooking chamber is lower than the outside temperature. Problems arise particularly when controlling low temperatures during thawing and fermentation processes. In other words, if the heat output of the lower heater is set low when the outside temperature is high, when the outside temperature is low, the heat output is insufficient and the temperature inside the cooking chamber quickly rises to the first set temperature. On the other hand, if you set the lower heater's heat output higher when the outside temperature is low, the temperature inside the cooking chamber will overshoot when the outside temperature is high. FAtx ripple increases.

The present invention has been made in view of the above-mentioned problems, and its purpose is to control the temperature inside the cooking chamber to a low set temperature, such as in the case of defrosting and fermentation, and to maintain the set temperature regardless of the external temperature. To provide a heating cooker capable of quickly raising the temperature to a temperature of 100 degrees and reducing temperature ripples.

[Structure of the Invention] (Means for Solving the Problems) The heating cooker of the present invention operates the heater according to the external temperature when the set temperature is low, such as when thawing and fermenting food in the cooking chamber. It is characterized by a configuration in which a control means for switching and setting the amount of heat generated is provided.

Further, when changing and setting the heat generation amount of the heater, it is preferable to change the on/off duty ratio of the heater.

(Function) According to the heating cooker of the present invention, when the external temperature is When the outside temperature is high, the heater is set to generate a small amount of heat, thereby reducing the temperature ripple in the cooking chamber.

Furthermore, if the heat generation amount of the heater is switched and set by changing the on/off duty ratio, control is simple and there is no loss.

(Embodiment) An embodiment in which the present invention is applied to an orb toaster will be described below with reference to the drawings.

First, the overall (I) configuration will be described according to FIG.

1 is the toaster body which is the main body of the cooking device, and this is the outer box 2
It is constructed by disposing a white stone 3 inside, and the inside of the inner box 3 is used as a cooking chamber 4. Reference numeral 5 denotes a door, which is pivotally installed in the front opening of the toaster main body 1 so as to be pivotable in the vertical direction to open and close the door. 6 was placed inside the cooking chamber 4. This is a toaster stand, which is pulled out and pulled in through the front opening of the toaster body 1 in conjunction with the opening and closing of the door 5.

Reference numeral 7 denotes an upper heater made of a quartz tube heater disposed in the upper part of the cooking chamber 4, and numeral 8 denotes a lower heater made of a quartz tube heater arranged in the lower part of the cooking chamber 4. Reference numeral 9 indicates an internal temperature sensor disposed on the inner surface of the upper part of the inner box 3, and numeral 10 indicates an external temperature sensor disposed on the lower front surface of the outer box 2. Note that 11 is an operation box provided at the lower front side of the toaster main body 1.

Now, the electrical configuration will be described according to FIG. 12
is a microcomputer serving as a control means that operates as described later, and is disposed in the control box 11, its power terminal is connected to the DC bus 13 to which a constant DC voltage Vcc is applied, and the ground terminal is grounded. 14 is a commercial power supply, which includes a power line 15.1
A series circuit of the upper heater 7 and the thyristor 17 and a series circuit of the lower heater 8 and the thyristor 18 are connected between these power supply lines 15 and 16. Incidentally, the DC bus bar 13 is connected to a power supply line 16. The two output terminals of the microcomputer 12 are connected to the gate of the thyristor 1718, and when the microcomputer 12 outputs the gate signal Sa, the thyristor 17 is turned on, energizing the upper heater 7, and the microcomputer 12 outputs the gate signal Sa. When the signal sb is output, the thyristor 18 is turned on and the upper heater 8 is energized. One is an external I/W connected to the input terminal of the microcomputer 12, which includes a start switch and other JAW operations. A buzzer 20 is connected to the output terminal of the microcomputer 12 and is activated when a drive signal Sc is applied from the microcomputer 12. These operation parts 19 and buzzer 2
0 is also arranged in the operation box 11. Note that the internal calendar degree sensor 9 and the external temperature sensor 10 are each connected to an input terminal of the microcomputer 12 so as to provide temperature information to the microcomputer 12.

Next, the operation of this embodiment will be explained with reference to the flowcharts and temperature characteristics of FIGS. 1 and 4.

When the constant DC voltage Vcc is supplied to the microcomputer 12, the microcomputer 12 starts operating. Therefore, the microcomputer 12 first enters the "initialization" processing step S1, and performs various initialization operations, resets a timer (not shown), and resets a flag F indicating whether or not heating is in progress to "0". . Next, the microcomputer 12 moves to the next judgment step S2 of "Start?", and here J
=', it is judged whether the start switch in the external 19 has been operated or not, and in the case of rNOJ, the judgment step S2 is performed again.
Return to Therefore, the user places the frozen bread dough in a predetermined container on the baking table 6 in the cooking chamber 4, and then operates the start switch of the operating section 19. This results in
The microcomputer 12 determines [Y
EsJ and 1tji, the "timer set" processing step S3 is reached, and the timer is set! ·do. Therefore, the timer starts timing operation. After that, the microcomputer 12 moves to determination step S4 of rF-1, 7j,
At this point, it is determined that rNOJ is 1tl'i, and the process moves to judgment step S5 of "Is it below 36°C?". In step S6, the microcomputer 12 determines whether the temperature inside the cooking chamber 4 detected by the internal temperature sensor 9 is below the first set temperature of 36°C. rF-1
Processing step S6 of j is reached, and the flag F is set to "1". Furthermore, the microcomputer 12 moves to judgment step S7 of "Has 90 minutes passed?", in which it judges whether 90 minutes have elapsed since the timer's time counting operation, and first
Judging as NOJ (less than 90 minutes), rF-1? The process returns to step S4 for determining J. In addition, the microcomputer 12 performs the first analysis step S of "Is it below 36 degrees Celsius?"
, if rNOJ is found (if the temperature in one cooking chamber 4 exceeds 36° C.), the process immediately jumps to judgment step S7 of "Has 90 minutes passed?"

Now, microcomputer]2 is, as mentioned above,
F=1°? " Returning to the judgment step S4, here r
After entering YESJ, the process moves to Step S8, where the answer is ``Is it below 36°C?'' Step S8.
(If the temperature in the cooking chamber 4 exceeds 36°C), the flag F is set in step S9 of [F-D J].
After resetting the value to "0", the process goes to judgment step S7. Also, microcomputer] 2 is ``3
Is it below 6℃? If rYESJ is determined in step S8, the following r] Is the temperature below 0°C? The process moves to judgment step SIO of j. In this judgment step SIG, the microcomputer] 2 analyzes whether the external tR degree detected by the external temperature sensor 10 is 10° C. or less,
When the rNOJ is disconnected (when the external temperature is 10° C. or lower), the process moves to the “pattern” output step S11. In this output step S11, the microcomputer 12 repeatedly outputs the gate signal sb for 1 second and stops for 3 seconds.
The current is turned on (on for 3 seconds) and then turned on for 3 seconds.
Microcomputer] 2 determines ``NO'' in the judgment step SIO of ``Is it below 10℃?''
If the temperature exceeds μ degrees or 10 degrees Celsius, "20 degrees
If the value is C or less or 9J, the process moves to step 512. In this judgment step S12, the microcomputer 12 judges whether the external temperature detected by the external temperature sensor]0 is below 20°C, and here, rNOJ and 'l'l are determined.
When the temperature is exceeded (external temperature exceeds 10°C and 20°C)
In the following cases), output step S1 of "pattern 2"
3, the gate signal sb is output for 0.5 seconds and stopped for 3°5 seconds, and therefore the lower heater 8 is turned on for 0.5 f, J) and turned off for '15 ft. Heating operation is repeatedly performed in a state in which the amount of heat generated starts to decrease compared to pattern 1. Furthermore, the microcomputer 12 determines "N
If it is judged as "O" (when the external temperature exceeds 20 degrees Celsius), it is judged as rNOJ and the process goes to "pattern 3" output step S14, in which the gate signal sb is output for 0.3 seconds and 3. Therefore, the lower heater 8 is repeatedly turned on for 0.3 seconds and turned off for 3.7 seconds to perform heating operation with a lower amount of heat generated than in pattern 2. become. Then, the microcomputer 12 performs the judgment step S of "Has 90 minutes passed?" even after passing through the output steps S1□+S13 and S14.
7, and if the answer is "NO" here, then rF-1? Return to judgment step S1 of J, and then judgment step S8, 310+ output step Sll
Or judgment step ss, Sl 0 * s, 2 output step S13 or judgment step Ss.

SIO, S1□, and output step Sta are repeated. Thereafter, if the temperature inside the cooking chamber 4 exceeds 36°C due to such repetition, the microcomputer 1
2, after determining "NO" at the 1'11 cutting step S8 of "Is it below 36°C" and proceeding to the processing step S of "rF-0", the process returns to the determination step knob S1. , the lower heater 8 stops the heating operation by the no-no-turns 1, 2, or 3.

And while the temperature inside the cooking chamber 4 exceeds 36℃,
The microcomputer 12 has Ste-nobu S4.8. and SI repeatedly, and heating in the barber room 4 is not performed for 15 weeks. After that 1. When the temperature in the temperature room 4 falls below 36°C, the microcomputer 12 displays the message “Is it below 36°C?
” Judgment Step S.

It was determined that it was rYEsJ, and the rF-IJ processing step knob S
Therefore, the heating operation according to the above-mentioned pattern 1.2 or 3 is restarted. As a result, in the process of thawing and fermenting frozen bread dough, the fourth
As shown in the figure, the temperature in the cooking chamber 4 is controlled to be substantially constant at 36° C., which is the first set temperature.

Then, when the thawing and fermentation steps described above are performed and the timer reaches 90 minutes, the microcomputer 12 performs a judgment step S of "Has 90 minutes passed?"
7, it is determined as rYESJ, and the process moves to the next determination step S16 of "Is the temperature below 150 degrees Celsius?". In this judgment step S15, the microcomputer 12 selects the internal humidity sensor 9.
detects j! It is determined whether the temperature in the first laboratory room 4 is 8 degrees Celsius or less than the second set temperature of 150 degrees Celsius. Here, it is first determined as ``YESJ'' and the process moves to output step S16 of ``top, heater on''. The microcomputer 12 is
In this output step 81B, the gate signals Sa and Sb are outputted continuously, so that the soil and lower heaters 7.
The heating operation is performed by continuously applying electricity.

Thereafter, the microcomputer 12 moves to a judgment step S18 asking "Has 105 minutes passed?", and here judges whether or not the timer has counted 105 minutes. Then, the microcomputer 12 performs this judgment step S.
18, it is first judged as rNOJ and returns to judgment step S15, and then steps S16+S18 and S
IS will be repeated. After that, if the l8 degrees in the cooking chamber 4 exceeds 150 degrees Celsius, the microcomputer 12 performs a determination step S of "Is it below 150 degrees Celsius?"
It is determined that rNOJ is detected at ts, and the output step S17 is "upper and lower heaters off", and the heating operation is stopped by stopping the output of the gate signals Sa and Sb and cutting off the power to the upper and lower heaters 7.8. As a result, when the temperature inside the cooking chamber 4 becomes +1 to 150°C or lower, the microcomputer 12 outputs the 11) and temperature signals Sa and Sb, and the upper and lower heaters 7.8 Heating operation by +I
T1 is opened. In this way, during the baking process, as shown in FIG. 4, the temperature in the cooking chamber 4 is controlled to be substantially constant at 150° C., which is the second set temperature. After that, when the timer's 1 o'clock operation reaches 105 minutes, the microcomputer 12 determines "YESJ" in the determination step 318 of "Has 105 minutes elapsed?" and outputs "upper 1 lower heaters off, buzzer on" in step S19. The output of the gate signals Sa and Sb is stopped, and the upper and lower heaters 7.8
At the same time, the drive signal Sc is output, and the buzzer 20 is energized for a certain period of time to ring, thereby ending the operation.

It should be noted that the above description is based on the case where the process is performed using the flowchart shown in FIG. be.

In this way, in this embodiment, based on the temperature information of the external temperature sensor 10 that detects the external temperature, when the external temperature is 10° C. or lower, the lower heater 8 is set to a pattern with a duty ratio of 1 second on and 3 seconds off. When the external temperature exceeds 10°C and falls below 20°C, the lower heater 8 is turned on with a duty ratio of 0°5 seconds on and 3.5 seconds off. Perform electric heating operation until the external temperature reaches 20℃.
When the lower heater 8 exceeds the lower heater 8, a heating operation is performed in which the lower heater 8 is turned on and off at a duty ratio of 0.3 seconds on and 3.7 seconds off. It becomes possible to switch settings according to the temperature. As a result, when the external temperature is as low as 10℃ or less, the cooking chamber
The temperature inside can be controlled with a relatively large amount of heat generated by Pattern 1, and can be quickly raised to the first set temperature of 36°C. In this case, even if the inside of the cooking chamber 4 is heated by the comparatively large heating opening according to the pattern], the outside temperature is low and the heat dissipation area of the toaster body 1 is large. heating.

Even by controlling the heating stop! The temperature inside Rigen Room 4 will not overshoot. In addition, if the external temperature is moderate, exceeding 10°C and below 20°C, the temperature within the cooking ￥4 can be controlled by the moderate amount of heat generated by pattern 2.
C1 suitable! It is possible to perform temperature control such as JJ. When the external temperature is relatively high, exceeding 20 degrees Celsius, the temperature inside the cooking chamber 4 is controlled with a relatively small amount of heat generated by the button 3, and the temperature inside the cooking chamber 4 overshoots. 1
- Temperature ripple can be reduced. In this case, even if the inside of the cooking chamber 4 is heated with a relatively small amount of heat according to pattern 3, the external temperature
Since the temperature exceeds °C, even though the heat area of the toaster body 1 is large, the heat is not radiated that much. Therefore, the temperature inside the cooking chamber 4 is lower than the first set temperature.
Of course, the temperature rises quickly to 6°C. Then, when switching and setting the heat generation amount of the lower heater 8, the lower heater 8
Since the on/off duty ratio is changed, it is simpler than, for example, a configuration in which the conduction angle or U pressure is controlled.
There is a point that there is no loss compared to growth.

By the way, during thawing and fermentation of frozen bread dough, cooking chamber 4
71+iA degrees is the first set temperature due to insufficient heat generation.
If the temperature does not rise to 6°C, fermentation by yeast will not proceed properly, and the so-called fluffy bread will not be produced. 'J! If the temperature ripple in the I-baking room 4 becomes large due to excessive calorific value, the yeast may overferment, resulting in so-called loose bread, or the fats and oils contained in the frozen bread dough may suddenly leak out. Is there a problem with the so-called Ura-like bread? Honjoshi C'+i does not have this problem at all and can make delicious bread.

In addition, in the above embodiment, the thawing and fermentation processes were controlled to the same first setting, or the respective settings were set to 1.
It may be controlled to H degrees.

Further, in the above embodiment, both the internal temperature sensor 9 and the external temperature sensor 10 are provided, but for example, the external temperature sensor 10 is omitted and the temperature information for starting operation of the internal temperature sensor 9 is used as the external temperature. It may be configured to detect this and switch and set the on/off duty ratio of the lower heater 8.

Furthermore, in the above embodiment, the frozen bread dough is thawed, fermented, and baked in a toaster oven, but instead of 1:R, for example, when preheating and kneading ordinary bread feed, the temperature is 36°. C (It is also effective for bread maker A, which is a heating cooker that controls the set temperature at a low temperature.

In the above embodiment, the present invention is applied to a toaster oven, or is not limited to this.
It is also possible to apply the present invention to other cooking devices that perform fermentation, such as electric ovens and microwave ovens.

[Effects of the Invention] Since the one-week heating device of the present invention is as explained above,
This has the following effects.

According to the heating cooker according to claim 1, since the heat generation amount of the heater is switched and set according to the external temperature, the temperature inside the cooking chamber can be quickly raised to the set temperature regardless of the external temperature. At the same time, the temperature ripple can be reduced.

According to the cooking device according to the second aspect of the present invention, since the heat generation amount of the heater is switched and set by changing the on/off duty ratio, simple control without loss can be performed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a flowchart for explaining the operation, Fig. 2 is an overall longitudinal sectional side view, Fig. 3 is an explanatory diagram of the electrical configuration, and Fig. 4 is a temperature characteristic diagram. . In the drawing, 1 is the toaster body (cooker body), 4 is the cooking chamber, 7 is the upper heater, 8 is the lower heater, 9 is the internal temperature sensor,
10 is an external temperature sensor, 12 is a microcomputer (
control means).

Claims (1)

[Claims] 1. In a device that heats food in the cooking chamber of the cooking device main body using a heater, when the set temperature is low, such as when thawing or fermenting the food, the heater is heated according to the external temperature. 1. A heating cooking device characterized by being provided with a control means for switching and setting the calorific value of the heating device. 2. The cooking device according to claim 1, wherein the control means switches and sets the calorific value of the heater by changing an on/off duty ratio.