JPS6066025A - Heating cooking device - Google Patents

Abstract

PURPOSE:To improve the cooking degree by using a proportional governor and a microcomputer control, varying gas amount in response to the temperature, cutting gas when the object temperature of an oven exceeds, thereby reducing the varying range of the temperature in a housing. CONSTITUTION:The detecting levels of a temperature sensor 6 includes upper limit, center and lower limit temperature levels. When the upper limit is detected, main burners 2 are all turned OFF, when the center is detected, the burning heat quantity of the main burner 2 is adjusted to the designated calorie, and when the lower limit is detected, the main burners 2 are all turned ON. In other words, the temperature in the heating housing (not shown) is detected by the sensor 6, a solenoid valve 41 is turned ON or OFF through a microcomputer 18 by the signal of the sensor to control the temperature in the oven housing to set heating temperature. Thus, the varying width of the temperature in the housing is less even in any set heating temperature, thereby forming a heating cooking unit of good cook finishing degree.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a composite heating cooker that integrates a gas open oven and a microwave oven, or a simple gas open cooker, and particularly to a temperature control device thereof.

The structure of the conventional example and its problems The scum opening in the conventional composite heating cooker 1 is the first problem.
As shown in FIGS. 4 to 4, the main burners A2 and B3 are controlled on and off by a first solenoid valve 4 and a second solenoid valve 5, respectively. As shown in Figure 3, the set heating temperature is 25
There are two detection levels of the temperature sensor 6, an upper limit temperature and a lower limit temperature, whether the temperature is below 0°C or above 0°C, and depending on this temperature, the main burner A2. B3' (i7 control was used to adjust the temperature inside the refrigerator.For example, at a set heating temperature of 250°C or lower, heating is performed with two main burners only during startup at the initial stage of heating, but once the set temperature +/C After reaching that point, one burner was extinguished and the temperature inside the open oven was adjusted using only the other main burner A2.
As shown in the figure, the temperature detected by the temperature sensor 6 is the upper limit temperature T1.
When the temperature reaches the lower limit temperature T2, the two main burners A2 and B3i are turned off so that only the pilot burner 7 burns, and when the lower limit temperature T2 is reached, the one main burner A2f is ignited and heated again to the upper limit temperature T1t. Thereafter, by turning on and off one main burner A2, the temperature inside the refrigerator is controlled to a set temperature of 220° C., for example.

Furthermore, if the set temperature is 250°C or higher, for example 300°C, one of the lights will be extinguished when the detected temperature of the temperature sensor 6 reaches the upper limit temperature T3, and the other lights will be extinguished when the temperature detected by the temperature sensor 6 reaches the upper limit temperature T4. One main burner B3'f: was ignited and heated with two burners, and the temperature was controlled by repeating this process thereafter.

With this conventional control method, the fluctuation range of the internal temperature becomes small due to the control of only one main burner A2, especially after 250 degrees Celsius, and the on/off interval becomes long. This solved the problem of the skin being overcooked and becoming tough to some extent, and it had some effect.

However, when the temperature is set around 250℃, the p1 gas flow rate varies depending on the gas type or due to fluctuations in gas pressure in the piping, so turning only one main burner A2 on and off will result in insufficient calories. There have been cases in which cooking fails when the temperature does not reach around 250°C.

Another conventional example is one in which control is performed using a plurality of solenoid valves, in which two burners are used in different strengths, which increases the number of times the solenoid valves are turned on and off, and the fluctuations become large.

That is, in FIG. 5, when the knob 8 is turned, the shaft 9 is rotated. When the gas cock closure 10 turns, it is fully opened and gas flows in from the end 11, passes through the pipe 12, follows the water at the bottom of the closure, flows to the gas cock seat 13, and flows into the elbow pipe 14.
The gas then passes through the governor 15, and air is drawn directly from the first solenoid valve 4 through the gas pipe 16, through the nozzle/I/17 of the first gas burner A2, and through the damper 18a, where it is combusted.

Further, the gas burner B goes from the first solenoid valve 4 to the second solenoid valve 5.
3 Nosurire 19, damper 18bJ sucks air and burns. In either case, control is limited to either all disappearing, only one turning ON or OFF, one turning ON and the other turning ON or OFF, or both turning ON or OFF, so the temperature setting value Calories were set in stages and could not be fine-tuned.

As another example of the conventional technology, as shown in Fig. 6, when the knob is turned, the gas cock 20's closure 21 is turned and the gas is fully opened, allowing gas to flow into the hose end 22, and the pilot cover is turned into the pilot cover. Adjust the gas pressure and ignite using the pyro-nodburner 23. When the thermoelement 25 branched off from the safety valve 24 operates, the safety valve 30 is held. When the safety valve reaches the gas regulator 15, the pressure is regulated, and gas is supplied to the proportional valve 4 according to the temperature. The solenoid valve 5 supplies all the gas to the upper flame transfer burner 46 and the upper flame burner 47. A part of the inside of the refrigerator 38 includes an internal temperature sensor 3.
9 senses the temperature inside the refrigerator and is linked to the proportional valve 4. Since this second example uses a proportional valve with a complicated structure, all conventional combination ranges have been subject to the methods of the first and second examples, resulting in a significant increase in cost.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional technology.The present invention uses a proportional governor and microcomputer control to change the amount of gas according to the temperature, and when the target temperature for opening is exceeded, the gas is cut and the temperature setting is adjusted. Through one-point management, we aim to reduce the number of ON/OFF solenoid valves, pursue low differential /L/, and control temperature.

In Fig. 7, when the gas cock knob 8 is turned, the gas cock switch 1 is opened in the same position as the gas cock 33.
0 turns on, the high-pressure spark generator 11 operates, and the spark plug 17 generates a spark.

On the other hand, the gas entering from the hose end 13 passes through the gas cock 33 and the governor 41, and the main burner 2 is ignited by the spark, which is detected by the flame rod 12 and the signal is sent to the microcomputer 18 to control the solenoid valve. Close 4. Then, gas flows through the main 7ff gas passage 20.19i to the twin burner 3゜2, and the spark plug 1
It can be re-ignited by 7. Thereafter, the temperature sensor 6 detects the temperature inside the heating chamber (not shown), and the solenoid valve 4'l'f is turned on and off based on the signal via the microcomputer 78 to control the temperature inside the open chamber to the set heating temperature.

FIG. 8 is a perspective view of a combination range in which a microwave oven and a gas oven are integrated according to the present invention. Gas flows by turning knob 8. Temperature slide 1 - knob 4o moves up and down, for example from 300℃ to fermentation temperature 4.
It can be set up to around 0'C.

Regarding Fig. 9, when the knob 8 is turned, the shaft 32 is turned, and the gas cock closure 33 is turned, the cock is fully opened, and the jf gas flows in from the hose end 13, and the vibrator 35 is turned.
The closed bottom water flows to the seat a6 of the energized gun cock through the elbow pipe 37'f: and the gas pressure is controlled by the proportional control governor 41, and the valve moves to the cock pipe 19 by turning the solenoid valve 4 ON and OFF. do. Gas blows out from the nozzle L'43.50, sucks air through the dampers 44-1 and 54-2, and burns it through the burners 2 and 3. Proportional governor 4 in Figure 9
1 will be explained in detail. If the value on the temperature display board 42 inside the oven is set to 300°C, the operating rod will be at position 43.A spring 64 that conveys the temperature value setting position is arranged at the upper end of the operating rod, and both ends of the spring are connected to the VCtri seat. are 45.46, and the rod 47 of the proportional governor is fixed to the seat 46, and the seat 49 of the governor pull ring 48 is fixed to the seat 46 to transmit the set position.

Furthermore, the operating rod 43 is equipped with an electric polyurethane 5-muro 3, so if you match the internal temperature of the open refrigerator with the resistance value of the temperature sensor, it will be possible to detect when the internal temperature of the refrigerator becomes higher than necessary. It can be cut using the solenoid valve 4.

The internal temperature control method, which is the gist of the present invention, will be explained below based on the drawings.

In Figures 13 to 15, the internal temperature is in the high temperature range of 250 to 3, including 300 degrees Celsius such as grilled fish.
The case where the temperature is set to 00°C is shown. Set temperature is 30
0111:, the internal temperature is expressed as iRm3, (
Rm3 + approx. 3℃)i Rh3, (Rm3- approx. 3℃)
It is expressed as m3. Similarly, the detected temperature of the temperature sensor when the set temperature is 300'C is the center temperature Tma.
, l limit temperature Th3, and lower limit temperature Tt3.

However, in order to more accurately detect the temperature inside the refrigerator, the temperatures detected by these temperature sensors are corrected to be detected at a point about 5° C. higher. That is, the center temperature Tm3=R
ma + about 5℃ Tonanashi, upper limit temperature Th3 and lower 1! I! The same is true for temperature Tt3. Based on the temperature detected by this temperature sensor, the main burner is controlled to burn approximately 80% of the calories, and the temperature inside the refrigerator is adjusted. Main burner A2, B
Combustion calorific value f when both 3 are burnt to maximum C2K
cal/h, and when controlled by the thermal power controller governor, it is assumed to be CI K cal/h.

First, at the beginning of startup, the two main burners A2 and B3 burn to 100% due to the operation of the governor solenoid 61.
Rapidly heats the inside of the refrigerator with a combustion calorific value of C2. After time 11 minutes have passed, the temperature detected by the temperature sensor 6 becomes the center temperature T.
When the temperature reaches m3°C, the governor solenoid coil is turned off by the microcomputer 18, and approximately 80% of the calories are burned. Therefore, the combustion calorific value at this time is CI K ca
t/h. However, the internal temperature drops after the salmon roe overheats due to residual heat. At this time, when the temperature detected by the temperature sensor 6 reaches the lower limit temperature Tt3, the governor solenoid coil is turned on by the microphone 718.
The main burner burns at maximum calories.

Thereafter, the above-mentioned control is repeated until the cooking time is completed.

If the door 21 is opened midway through, for safety reasons, the main burner A2. The configuration is such that R3 is extinguished and a hot air circulation fan (not shown) is stopped, which causes the temperature inside the open refrigerator to drop rapidly.

When the door 21 is closed again and heating is resumed, the temperature inside the refrigerator is S'°C, which is lower than the lower limit temperature R13, and the temperature S'C detected by the temperature sensor 6 at this time is also S'°C. 1”1B temperature Tt3
Therefore, both burners of main burner A2°R3 are ignited again. The hot air circulation fan is also turned on again. After this, normal control is repeated.

Further, in FIG. 13, for example, when the temperature sensor 6 detects the ``1 limit temperature Th2'' for some reason, the main burner A2
．． R3 is also extinguished.

In this way, in the "high" range of 250°C or higher to 300°C, the detection level /l' of the temperature sensor 6 is heated at the maximum calorie during lower heating, and when the central temperature Tm3 is reached, the governor solenoid The coils operate and heat according to each set temperature. In FIG. 10, when the lower limit temperature Tt3 is reached, heating is performed at max, and when the upper limit temperature Th3 is reached, the main burner A2. Both R3 are extinguished. The detection V/l/ of the temperature sensor 6 mentioned above is stored in advance in the microcomputer 18, and when the set heating temperature value is entered manually, the optimal upper limit, center, and lower limit temperatures are selected and controlled accordingly. .

Next, when the set heating temperature is in the range of about 200 to 250°C, the control is as shown in Figs.
2. When heating is performed by R3 and the temperature detected by the temperature sensor 6 reaches the center temperature Tm2, the Kahanan lenoid coil burns at approximately 50% of the calories of operation. When the oversheet reaches the lower limit temperature Tt2 after 14 minutes have elapsed, the main burner B3 is ignited and the Q control is repeated repeatedly, but when the upper limit temperature Th2 is reached, all 7<-boo extinguish a fire.

Furthermore, control in the "low" range of about 150 to 200°C is the same as in the "high" and "medium" ranges described above. As shown in FIGS. 13 to 15, in this case as well, the main node of Max is A2. When the central temperature Tm1 is reached, the governor solenoid coil is first turned off, and then the number of combustions of the main burner is changed according to the temperature detected by the temperature sensor 6 to control the internal temperature.

As is clear from the above explanation, this embodiment uses the temperature sensor 6.
detection level) Ltf upper limit temperature, center temperature, lower limit temperature
When the upper limit temperature is detected, all the main burners are turned off, when the center temperature is detected, the main burner combustion calorific value is adjusted to the specified calorie, and when the lower limit temperature is detected, all the main burners are turned on. The following effect can be obtained.

(1) I like the 6-point seat number due to gas types, Nosurire, force banners, etc., but in the case of gas types such as 6B, 6C, 7C, etc., the gas flow rate will decrease by more than 40% in the worst case. According to the preliminary calculations, conventional heating control methods lacked the amount of heat generated by combustion, leading to cooking failures and prolonged cooking times.

In this example, for the input fluctuation of the Ganu flow rate,
The combustion calorific value is automatically corrected by microcomputer control, ensuring the combustion calorific value at any set temperature.

(2) Fire: The h controller governor selects the heating power tM according to the temperature setting and finely controls the heating, so there is less fluctuation in the internal temperature and the cooking quality is good.

r31 Due to the action of the solenoid coil, the rise force 11 is always heated at full power when it is hot, so the start-up is fast, and even if 1.゛Action 1 is opened in the middle and only one is left, the start-up is quick again because it is at full power.

(4) During start-up and heating, when the center temperature Tm is reached, it switches to the heat controller I/roller governor and supplies heat according to the temperature setting, so there are fewer sheets and no preheating time is required. This reduces cooking time.

(5) Since the number of times the solenoid valves 4 and 5 are turned on and off is reduced, the durability of the solenoid valves is improved and low-noise operation is possible.

(6) Microcomputer control automatically compensates for insufficient gas flow due to various failures on the stepless linear side pipe, regardless of the set temperature, and ensures sufficient gas flow. can. Also, no matter what heating temperature is set, the temperature sensor detects at least three temperatures: upper limit temperature, center temperature, and lower limit temperature.
The configuration controls the main burners to a predetermined, appropriate, zero output when one of the detected temperatures is reached, so the fluctuation range of the internal temperature is small and the heating cooker can produce good cooking results. can be provided.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a conventional combined heating cooker, Fig. 2 is a configuration diagram of the gas circuit of the cooker, and Figs. 3, 4, 5, and 6 show the temperature of the cooker. An operation explanatory diagram showing the relationship between the detected temperature of the sensor and the main burner on/off; Figure 7 is an electric/gas connection diagram of an embodiment of the present invention; Figure 8 is an external view of an embodiment of the present invention. A perspective view, and FIG. 9 is a gas circuit configuration diagram of an embodiment of the present invention, and FIGS. 10 to 15 show the relationship between the temperature detected by the temperature sensor of the cooker, the start/stop of the main burner, and the temperature inside the heating chamber. FIG. 2.3... Main burner (heating device, 6...
...Temperature↓sensor, 18...Microcomputer, Rh, Rm, R1...Inner temperature, Th, Tm, Tl - - Temperature detected by the temperature sensor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Fig. 2 Fig. 3 Fig. 4 Fig. 1 hour Fig. 5 gT5J 6 Fig. 3θ Fig. 7

Claims (3)

[Claims] (1) A heating chamber that accommodates objects to be heated, a heating device that heats the heating chamber, a temperature sensor that detects the temperature inside the heating chamber, and a signal of a temperature sensor and an output of the heating device. and a control device including a microconbeater that controls heating time, etc., the temperature detected by the temperature sensor is set to at least two levels, an upper limit temperature and a lower limit temperature, corresponding to the set heating temperature, and a single solenoid valve is used. . A heating cooker that proportionally controls the output of the heating device according to the designated cooking temperature of each of the cooking devices. (2) A heating chamber that accommodates objects to be heated, a heating device that heats the heating chamber, a temperature sensor that detects the temperature inside the heating chamber, and an output and heating time of the heating device based on a signal from the temperature sensor. and a control device including a microconbeater for controlling the heating temperature, etc., and the temperature detected by the temperature sensor is set in at least G stages of upper limit, center, and lower limit temperatures corresponding to the set heating temperature, and according to the temperature in each stage. The said cooker. (3) When the upper limit temperature is detected, the output of the heating device is set to zero, the solenoid valve is turned off to reduce the output to half by the thermal power controller when the center temperature is reached, and the output is set to full output when the lower limit temperature is detected.
The cooking device according to claim 1, wherein the inside of the heating chamber is controlled to a set heating temperature.