JP3038886B2 - High frequency heating equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device that controls a heating unit based on data of a temperature detection unit that detects a temperature in an oven storage.

2. Description of the Related Art In recent years, a high-frequency heating device has been required to be able to perform a good cooking finish irrespective of a change in the state of a food item or a power supply voltage.

Conventionally, this type of high-frequency heating apparatus generally has a configuration as shown in FIG. 8 and FIG. Hereinafter, the configuration will be described.

As shown in the figure, the cooking selection means is for setting cooking, and constitutes an input means 3 together with an encoder 2 for setting a cooking time and the like, and is input to a cooking setting means 5 in a microcomputer (hereinafter referred to as a microcomputer) 4. doing. The cooking setting means 5 receives an output signal from the input means 5 and selects and selects a required cooking mode from a plurality of predetermined cooking modes. Cooking start instructing means 6 instructs the start of cooking. Temperature detection means (hereinafter referred to as thermistor) 7
Detects the temperature inside the oven storage 8. The control means 9 in the microcomputer 4 inputs the cooking mode in which the cooking setting means 15 is selected, the output of the cooking start instructing means 6 and the output of the temperature detecting means 7, and outputs the heater
14 and the operation of the commander fan 16 for cooling the magnetron 15 and the magnetron 15 and the like. The display means 17 displays the set cooking, time, and the like.

The oven storage 8 is provided in a heating device main body 18, the heaters 14 are disposed on both upper and lower surfaces of the oven storage 8, the magnetron 15 is provided on the side surface, and the tray 20 on which the food 19 is placed is provided on the lower surface. On a front operation panel (not shown) of the heating device main body 18, a cooking selection key 1, an encoder 2, a cooking start instruction means 6, a display means 17, and the like are provided.

The operation of the above configuration will be described. In the automatic cooking, for a menu such as a toast which emphasizes the color or baking, the menu and the number of sheets are set in the cooking setting means 5 in the microcomputer 4 by inputting the cooking selection key 1. ,
The finished cooking is determined, and the control means 9 drives the relay 10 in response to an input from the cooking start instructing means 6, and the heater 14 is energized to start cooking. When there is an input from the cooking start instructing means 6, the control means 9 controls the temperature data in the oven 8 from the thermistor 7 and the menu, the number of sheets determined by the cooking setting means 5, and the contents of the finishing adjustment. In addition, a time auto sequence is adopted in which the optimum baking time calculated based on the basic baking time is displayed on the display means 17, the relay 10 is driven for that time, and heating is performed by the heater 14.

However, in such a conventional high-frequency heating apparatus, if the temperature data in the oven chamber 8 from the thermistor 7 at the time when the input from the cooking start instruction means 6 is the same, the food is Even if there is a difference in the thickness and temperature (whether frozen or not) of 19, and even if the power supply voltage fluctuates, heating is performed in the same cooking time, so the finish of the cooking is light or dark. However, there is a problem that variation occurs.

In the case where the door is opened during the cooking, the cooking is interrupted, and then the cooking is resumed by the input from the cooking start instructing means 6, the display means irrespective of the state or the time at the time of the interruption of the cooking.
Since heating is performed only for the remaining time at the time of opening the door indicated by 17, there is a problem that the finish is worse than when heating is performed without interrupting cooking.

The present invention has been made to solve the above-described problem, and after heating for a minimum heating time determined at the time of starting cooking, watching the temperature rise during that time, and finishing the cooking when the determined cooking end temperature is reached. Accordingly, it is a first object of the present invention to provide a high-frequency heating device that can provide a good finish of cooking regardless of the state of food or fluctuations in power supply voltage.

The second object is to open the door in the middle of cooking and restart cooking in a state where the temperature in the refrigerator has dropped, or to cook without interruption by checking the temperature at the time of opening the door and restarting cooking. Thus, a high-frequency heating device having the same finish as that described above is provided.

Means for Solving the Problems In order to achieve the first object, the present invention provides an input unit including a key for setting cooking and an air coder for setting a cooking time, and an output signal from the input unit as an input. Cooking setting means for selecting and selecting a plurality of predetermined cooking modes; cooking start instructing means for instructing the start of cooking; temperature detecting means for detecting a temperature in the oven chamber; Display means for displaying
Heating means for heating the food, and control means for controlling the driving of the heating means and controlling the driving of the display means, wherein the control means includes data on the initial temperature of the temperature detecting means and the cooking setting means. A first problem solving means wherein a minimum heating time and a cooking end temperature according to a selected cooking mode are determined, and the heating means is controlled based on data from the temperature detecting means. And

In order to achieve the second object, the control means in the first means for solving the problems, when the cooking is interrupted and restarted, controls the heating based on the data from the temperature detecting means when the cooking is interrupted and when the cooking is restarted. The second means for solving the problem is to control the means.

According to the first aspect of the present invention, after heating for the minimum heating time, the cooking can be terminated when the temperature in the oven reaches the cooking end temperature, and the toast, fry, pizza, etc. In cooking that emphasizes the color of baking, a good cooking finish can be achieved regardless of fluctuations in the state of the food or the power supply voltage.

Further, according to the second problem solving means, even when cooking is interrupted by opening the door in the middle of cooking and restarted, the end of cooking is determined based on the oven internal temperature at the time of interrupting and restarting cooking. Therefore, the same finish as when heating without interrupting the cooking can be obtained.

Embodiment An embodiment of the present invention will be described below with reference to FIG. Components having the same configuration as the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, the microcomputer 21 controls the high-frequency heating device, and the cooking setting means 5 in the microcomputer 21 determines the menu and finish of the cooking, and when there is an input from the cooking start instruction means 6, The control means 22 controls the temperature data in the oven 8 from the thermistor 7, the menu determined by the cooking setting means 5, the minimum heating time (hereinafter referred to as the minimum baking time) according to the finish adjustment, and the cooking end temperature (hereinafter referred to as the cooking end temperature). 10, f / v conversion circuit to determine the baking temperature) and perform heating according to the menu
23 and the bidirectional thyristor 24
14, The magnetron 15 and the cooling fan 16 are driven to start cooking. During the cooking, the controller 22 checks the temperature data in the oven 8 from the thermistor 7 at all times, and determines the end of the cooking. The display unit 17 does not display the cooking time.

Next, a control sequence of the control means 22 will be described with reference to FIG. The control sequence consists of the sequence judgment temperature T _B and the baking temperature T _A, and the minimum baking time.
Tm ₁ (T ₁ + T ₂ + T ₃ because there are three heating patterns before the minimum baking time for fry and puza), the minimum baking time Tm ₂ when the temperature does not rise easily (for example, when the food is frozen) has set (fly, T ₄ in the case of flops the) and for cooking limiter time T _max (which toasting, cooking time of two frozen bread and most baked time becomes longer in a state of power supply voltage 90V ). Incidentally, T ₁ through T ₃ represents a heating pattern, T ₁ is heated by the heater 14 and the magnetron 15, T ₂ is heated by a portion of the heater 14, T ₃ is heated by the heater 14.

Further, the control sequence includes two sequences, a sequence _A for controlling at the baking temperature T _A and a sequence _B for controlling at the temperature T _B when the temperature does not easily rise. However, all the temperature zones I, II, and III described below for the toast are sequence A.

Sequence A has a minimum baking time T _m1 (T ₁ + T ₂ +
The case where the temperature T _B is exceeded during T ₃ ). Like the curve a in FIG. 2, upon reaching the temperature T _A baked in minimum baking time _{T m1 (T 1 + T 2} + T 3) , the minimum baking time T
Cooking is completed at _m1 (T ₁ + T ₂ + T ₃ ). Minimum baking time
If the baking temperature T _A has not been reached by T _m1 (T ₁ + T ₂ + T ₃ ), the cooking is terminated when the baking temperature T _A is reached as shown by the curve b in FIG. Further, as shown by the curve c in FIG. 2, if the baking temperature T _A does not reach the minimum baking time T _m2 (T ₄ ) when the temperature is hard to rise, the time T cooking end to at _m2 (T _4). That is, in the case of the sequence A, the cooking limiter is the time T _m2 (T ₄ ).

During minimum baking time _{T m1 (T 1 + T 2} + T 3), if not exceeding the temperature T _B, the sequence B. If it is determined that the sequence is B, the minimum baking time extends to T _m2 (T ₄ ), and the detected temperature becomes T _B. As shown by the curve e in FIG. 2, when the temperature T _B is reached during the time T _m2 (T ₄ ), the time T
the cooking end in _m2 (T _4). However, when the baking temperature T _A is reached during the time T _m2 (T ₄ ) as indicated by the curve d in FIG. 2, the cooking is terminated at that point. If the temperature T _B has not been reached by the time T _m2 (T ₄ ), the cooking ends when the temperature T _B is reached, as shown by the curve f in FIG. further,
As the curve g of Figure 2, if there was no reaching a temperature T _B even when the limiter time T _max, limiter time T _max
To finish cooking.

The operation of the above configuration will be described with reference to FIGS.

When the cooking selection key 1 and the input of the encoder 2 are input, the cooking setting means 5 in the microcomputer 21 determines that the dish is an auto toast, a fry, or a pizza. until there is an input from, circulating in step S ₁ of FIG. 3.
When there is an input from the cooking start instruction means 6, in step S _2, a plurality of boundary temperature that has a temperature data in the oven chamber 8 from the thermistor 7 for each menu,
As shown in FIG. 5, an initial temperature determination is made for classification into a plurality of temperature zones I to IV.

If the temperature range is determined in step S _2, in step S ₆ from step S _3, baked according to the temperature zone temperature T _A, the temperature T _B of the sequence control, minimum baking time T _m1 (fly,
In the case of Puza, the first stage time T ₁ ) and the limiter time T _max were each corrected by finishing adjustment.
_{T A ', T B',} T m1 '(T 1'), the T _max 'is set, reaches a step S _7, to set the heating pattern of the heating means 13 according to the menu, to start the heating .

When cooking is started, processing is performed every second. 1
Step of Fig. 4 while checking door opening until seconds
And S ₈ circulating in step S ₃₇ of Figure 6. 1 sec Tatsuto leads to step S _9, to count the limiter time T _max '. When T _max 'is determined to have ended in step S _10, and ends the cooking leads to step S _36. T _max ′
Is not completed, the temperature in the oven storage 8 at that time is checked. 'Compare, T _A' inside temperature and the temperature T _A in step S ₁₁ in the case of more than reach the step S _12, it sets a flag indicating that it has reached the T _A '. When it is less than T _A 'proceeds to step S _13. 'Compare, T _B' inside temperature and the temperature T _B in step S ₁₃ if it is less than the flow proceeds to step S _17. For T _B 'above, checks the sequence in step S _17, if the sequence has not been determined, leading to a step S _14, the process proceeds to step S ₁₇ becomes sequence A determination. If the sequence B leads to step S _15, the process proceeds to step S ₁₇ sets a flag indicating that it has reached the T _B '. Check may interrupt the cooking in step S _17, when uncooked interrupted proceeds to step S _22.

In step S _22, T _m1 '(fly, in the case of pizza T <sub>1'
+ T 2 '+ T 3'</sub> ) it is checked whether the finished, if it is finished the process proceeds to step S _29, to determine the end of the cooking. If T _m1 'is not completed leads to step S _23,
T _m1 'counted (fly stage times in the case of pizza), T _m1 at step S _24' checks whether or exit. If T _m1 'is not completed leads to step S _7, T
_m1 'circulates the step S ₂₄ from step S ₈ until the end. If T _m1 'is completed reaches the step S _25,
A flag indicating that T _m1 'has been completed is given, and step S
Proceed to ₂ to check the sequence. Sequence A
For leads to step S _28, rewriting the _{T m2 '(T 4')} T max ' to the limiter, and the flow proceeds to step S _29.
If it is determined that the sequence B in step S _26, leads to the step S ₂₇ T _{m @ 2} 'and set the (T ₄₎ Step S
Go to ₂₉ .

Step S ₂₉ or later, to check the end of the cooking came T _m1 'after the end of each time. A check of the sequence in step S _29. S step for sequence A
The procedure proceeds to S _25, to check whether you are reaching the T _A '. T _A ′
If the flag indicating that has been reached is set, step S
Proceed to ₃₆ to complete the cooking. The process proceeds to step S ₇ if not reached T _A ', set the heating pattern returns to step S _8. If it is determined that the sequence B in step _{S 29, T m2 '(T} 4') in step S ₃₀ it is checked whether the termination. If the T _m2 'has been completed, the process proceeds to step S _34. If T _m2 ′ has not ended,
Counting T _m2 a '(T _4') leads to step S _31, T _m2 'is checked whether completed in step S _32. T _m2 ′
If it is not completed the process goes to step S _34. T _{m @ 2} 'if has been completed reaches a step S _33, T _m2' proceeds to step S ₃₄ sets a flag indicating that is finished.

In step S _34, 'checks whether has been reached, T _B' T _B if standing a flag indicating that it has reached the processing proceeds to step S _36, and ends the cooking. T _B 'does not reach the lead to step S _35, T _A' checks whether has been reached, if reached T _A ', step S
Proceed to ₃₆ to finish cooking, and if not, step S ₇
Set reaches heating pattern, the flow returns to step S _8.

Thus cooking, checks every second temperature in step S ₂₁ from step S _13, T _m1 'after completion of T _A', T _m2 'after completion of T _B' to reach, or the end of the limiter time To end.

Next, processing when the door is opened during cooking and cooking is interrupted will be described with reference to FIGS. 6 and 7. FIG.

Always during cooking, as shown in the flowchart of FIG. 6, it is checked whether the door is opened in step S _37. Because if the door is not open to continue the cooking, the process proceeds to step S ₈ of FIG. 4. If it is determined that the door is opened during cooking leads to step S _38,
The internal temperature at that time is stored in the memory. T _m1 'checks whether the finished, T _m1' in step S ₃₉ reaches step S ₄₀ if completed. Checks the sequence in step S _40, leads to the step S ₄₂ in the case of sequence _A, (T A '- thermistor 7 of opening the door
The temperature) of memorized as [Delta] T, the process proceeds to step S _43.
If in step S ₄₀ it is determined that the sequence B, reaches the step S _41, - to memory (T _B 'temperature of the thermistor 7 of opening the door) as [Delta] T, the process proceeds to step S _43. If T _m1 'is determined medium in step S _39, because in some cases the sequence has not been determined, the process proceeds to step S ₄₃ so can not be performed the processing of step S ₄₀ and later, the process in the case where the door opening made When the cooking is resumed, the door is not opened.

In step S _43, the program does not proceed until there is input from the cooking start instruction means 6. The program does not proceed until there is an input from the cooking start instruction means 6. When a input from the cooking start instruction means 6, so that the temperature decline of the curve c in FIG. 7 in step S _44, the process proceeds to step S ₃₆ if the level or higher that can guarantee the possible cooking, to terminate the cooking. If the decline in temperature is within the specified range leads to step S _45, the temperature of the thermistor 7 at the time of re-start and the memory, the cooking is resumed proceeds to step S _7.

When the cooking is resumed, the process returns to step S ₈ and subsequent steps in the flowchart of FIG. 4 in step S _17, because it is determined that the door opening, the flow proceeds to step S _18. In step S _18, (current temperature - temperature at the time of re-start)
Is calculated and compared with ΔT stored when the door is opened. ΔT
Step S ₂₁ in the case of sequence A checks the sequence reaches the step S ₁₉ when there is more variation
, And a flap indicating that T _A ′ has been reached is set. In the case of Sequence B, the process proceeds to step S ₂₀ , and a flap indicating that T _B ′ has been reached is set, and the process proceeds to step S ₂₂ . As shown by the curves a and b in FIG. 7, when the door is opened, there are several levels remaining until the target temperature is reached, and after the restart, it is considered that the target temperature has been reached when the temperature has increased by that much. On the other hand, both absolute and relative values are checked.

Effects of the Invention As is clear from the above embodiments, according to the present invention,
Control means for controlling the driving of the heating means for heating the food,
The minimum heating time and the cooking end temperature according to the initial temperature data of the temperature detecting means and the cooking mode selected by the cooking setting means are determined, and the heating means is controlled based on the data from the temperature detecting means. Therefore, the finish of the cooking is excellent regardless of the state of the food such as the difference in the initial temperature, the size of the food, the presence or absence of freezing, and the power supply voltage, and particularly, the finish of the cooking that emphasizes the baking color is extremely good. .

In addition, when the control means interrupts and resumes cooking, the control means controls the heating means based on data from the temperature detection means at the time of interruption and restart of cooking, so that the same finish as when heating without interrupting cooking is obtained. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block circuit diagram of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a time chart of the high-frequency heating device,
FIG. 3 is a flowchart until the setting of the heating pattern of the high-frequency heating device, FIG. 4 is a flowchart after the setting of the heating pattern of the high-frequency heating device, and FIG. 5 shows the temperature zones classified by the initial values of the high-frequency heating device. Fig. 6, Fig. 6 is a flow chart when the door is opened during heating of the high frequency heating device, Fig. 7 is a time chart when the door is opened during heating of the high frequency heating device, and Fig. 8 is a conventional high frequency heating device. FIG. 9 is a block circuit diagram of a heating device, and FIG. 9 is a longitudinal sectional view of a general high-frequency heating device. 1... Cooking selection keys, 2... Encoders, 3... Input means, 5... Cooking setting means, 6.
... temperature detection means, 8 ... oven storage, 13 ... heating means, 17 ... display means, 19 ... food, 22 ... control means.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-140511 (JP, A) JP-A-2-161216 (JP, A) JP-A-2-146421 (JP, A) JP-A 64-64 23025 (JP, A) JP-A-51-83249 (JP, A) JP-A-4-151429 (JP, A) JP-A-64-8118 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24C 7/02 320 F24C 7/02 340

Claims (2)

(57) [Claims] An input means comprising a key for setting cooking and an encoder for setting a cooking time and the like, and a cooking setting means for inputting an output signal from the input means and selecting and selecting a plurality of predetermined cooking modes. And cooking start instructing means for instructing the start of cooking, temperature detecting means for detecting the temperature in the oven, display means for displaying the set cooking time and the like, heating means for heating food, Control means for controlling the driving of the heating means and controlling the driving of the display means, the control means corresponding to the data of the initial temperature of the temperature detecting means and the cooking mode selected by the cooking setting means. A high-frequency heating apparatus configured to determine a minimum heating time and a cooking end temperature, and to control the heating means based on data from the temperature detection means. 2. The high-frequency device according to claim 1, wherein the control means controls the heating means based on data from the temperature detecting means when the cooking is interrupted and restarted, when the cooking is interrupted and when the cooking is restarted. Heating equipment.