JPH05168564A - Oven toaster - Google Patents

Abstract

PURPOSE:To keep the condition of baking constant by counting door opening time while a heater is not energized between the preceding thermal cooking end time and the start of the subsequent thermal cooking to correct the energization time corrected according to the counts of the time. CONSTITUTION:An opening detection member 26 detects the opening of a door 25 of a heating chamber 15 and a time counting means counts the time of opening the door 25 when the opening detection member 26 detects the opening of the door 25 while a heater 21 is not energized during the period from the preceding thermal cooking end time till the start of opening the subsequent thermal cooking. Then, the energization time corrected previously, namely, the energization time of the heater 21 to the preceding operation which is corrected and set according to the frequency of energization and the non- energization time is further corrected by a correction means according to the time counted by the time counting means. This mechanism always enables to provide a constant baking condition regardless of the length of the time when the door 21 is opened during the non-energization time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oven toaster capable of maintaining a constant baking condition even if many breads, which are food items, are continuously baked.

[0002]

2. Description of the Related Art Conventionally, an oven toaster described in Japanese Patent Publication No. 1-28576 is known. This oven toaster corrects the energization time set according to the number of energizations to the heater up to the previous time, energization time, and non-energization time, and energizes the corrected energization time heater to keep the bread baking condition constant. It is the one.

[0003]

By the way, the temperature of the heating chamber of the oven toaster is greatly lowered when the door of the heating chamber is opened because the outside air having a low temperature flows in. Therefore, for example, when baking bread continuously, if the user keeps the door open when de-energized, the temperature in the heating chamber will drop. There was a problem that it could not be kept constant.

The present invention has been made in view of the above problems, and an object thereof is to provide an oven toaster that can always obtain a constant baking condition regardless of the length of time the door is open when the power is not supplied. To provide.

[0005]

In order to achieve the above object, the present invention heats and cooks an object to be cooked placed in a heating chamber, and the heater energizing time, energizing frequency up to the last time, In the oven toaster that corrects the energization time set according to the non-energization time, and energizes the corrected energization time heater to keep the baking condition of the cooked food constant,
An opening detection member that detects the opening of the door that opens and closes the entrance and exit of the heating chamber that puts in and out the object to be cooked, and the opening detection when the heater is de-energized, which is the period from the end of the previous cooking to the start of the next cooking. When the member detects the opening of the door, it is provided with a time measuring means for measuring the opening time and a correcting means for correcting the energized time corrected in accordance with the time measured by the time measuring means. Characterize.

[0006]

According to the present invention, the opening detection member detects the opening of the door, and the time detection means detects the opening when the heater is not energized, which is the period from the end of the previous cooking to the start of the next cooking. When the member detects the opening of the door, the opening time is measured. Then, the correction unit corrects the corrected energization time according to the time measured by the time measuring unit.

[0007]

Embodiments of an oven toaster according to the present invention will be described below with reference to the drawings.

2 to 4, reference numeral 10 denotes a main body case constituting a main body of the oven toaster, which has a bottom plate 11, side plates 12, 12, a top plate 13 and a back plate 14. An inner case 20 having a heating chamber 15 formed therein is provided in the main body case 10. The inner case 20 includes a grill 16 and heaters 2 provided at upper and lower positions sandwiching the grill 16.
It is provided with an inner plate 22 for holding 1, 21 and a back reflection plate 23, a partition plate 24, and a reflection top plate (not shown). Partition plate 2
4 is located at a predetermined height from the bottom plate 11 and partitions the chamber vertically.

The front part of the heating chamber 15 is opened for putting in and out the food to be cooked, and a door 25 is provided at the opening so as to be openable and closable. A micro switch 26 for detecting opening / closing of the door 25 is provided in a gap formed between the one side plate 12 and the one inner plate 22. The micro switch (opening detection member) 26 is turned on, for example, when the door 25 is opened.

An operation panel 30 is provided below the door 25 at the lower front surface of the main body case 10. The operation time of the heater 21 is set on the operation panel 30 to set the baking condition of the food to be cooked. Setting switch 31, a display 32 for displaying the set baking condition, a start switch 33 for starting energization of the heater 21, a heater 21
A stop switch 34 and the like for forcibly stopping the energization of are provided.

A partition plate 41 partitioning the control chamber 42 is provided behind the operation panel 30. Control room 42
The circuit boards 43 and 44 are arranged in the
3, 44, and the like are provided with electronic components and the like that constitute a control device 50 (see FIG. 1) that controls the energization time of the heater 21 and the lighting of the display 32.

FIG. 1 is a block diagram showing the configuration of the control device 50. In FIG. 1, 51 is a ROM storing a control program for baking bread, which is the food to be cooked, and 52 is the first baking of bread. In the ROM that stores the time, for example, when the bread baking condition can be set to three types of high, medium, and low by the setting switch 31, three times corresponding to high, medium, and low are stored in the ROM 52. ..

Reference numeral 53 is an RA for storing the number of times the bread has been baked from the time when a main switch (not shown) is pressed to the present time.
Denoted by M and 54 are non-energizing time measuring means for measuring the non-energizing time of the heater 21, which is, for example, a period from the end of the first baking to the baking of the second baking when the heater 21 is not energized. It measures time. Reference numeral 55 is an opening time measuring means for measuring the time when the door 25 is opened when the electricity is not supplied, 56 is a closing time measuring means for measuring a time when the door 25 is closed when the electricity is not supplied, and 57 is an electricity supply time of the heater 21. It is an energization timing means for timing.

Reference numeral 58 denotes a calculation control means (correction means), which is a control program stored in the ROM 51 based on the data of the time measured by the time measuring means 54 and 55 and the data of the number of baking times stored in the RAM 53. The correction time Tα is calculated in accordance with the above, and a control signal for energizing the heater 21 for a time (T−Tα) obtained by subtracting the correction time Tα from the first energization time T stored in the ROM 52 is output to the heater control circuit 59. ..

The heater control circuit 59 is composed of a switch circuit composed of, for example, a transistor and the like, and this switch circuit conducts while the control signal of the arithmetic control means 58 is received to energize the heater 21.

Next, the operation of the oven toaster of the above embodiment will be described with reference to the flow charts shown in FIGS. 5 and 6.

First, a pan (not shown) is placed on the grill 16 of the heating chamber 15. Then, the main switch (not shown) is turned on, and the breading condition is set by the setting switch 31.

When the main switch is turned on, the non-energized timing means 54, the closed timing means 55, and the open timing means 56 start timing (steps 1-3: step is indicated by S in the drawing). In step 4, it is determined whether the door 25 has been opened. That is, it is judged whether or not the micro switch 26 is turned on, and if the result is no, the process proceeds to step 5. In step 5, the timing of the opening timing means is stopped, and in step 6, the timing of the closing timing means is added.

If YES is determined in step 4, the process proceeds to step 7. In step 7, the timing of the closing timing means 56 is stopped, and in step 8, the opening timing means adds the timing. In step 9, it is determined whether or not the start switch 33 is turned on. If the result is no, the process returns to step 4, and step 4 is repeated until the start switch 33 is turned on.
→ The operations of steps (5), (6) and (9) to (4) (1) loop or (4) to (7), (8) and (9) and (4) (2) loop are repeated. (1) Each time the operation of the loop is repeated, the time measured by the closing time measuring means is added in step 6. That is, the time during which the door 25 is closed is measured by the addition.

Similarly, (2) by repeating the operation of the loop, the timing of the opening timing means is added in step 8,
The time when the door 25 is opened is measured.

When it is judged YES in step 9, the process proceeds to step 10, and in step 10, non-energized time measuring means 54, open time measuring means 55, and close time measuring means 56.
Is stopped, and in step 11, the energization time measuring means 57 is
To start the clock. In step 12, the energization time corresponding to the bread baking condition set by the setting switch 31 is read from the ROM 52.

In step 13, it is judged how many times the bread has been baked, and if it is the second time or more, the process proceeds to steps 14a to 14n, and if it is the first time, the process proceeds to step 15. Step 1
In 5, the arithmetic control unit 58 determines the energization time of the heater 21. Since the baking is the first time, the energization time read in step 12 is set to the energization time of the heater 21.

In step 16, the operation control means 58 energizes the heater 21 via the heater control circuit 59, and in step 17, it is judged whether or not the stop switch 34 is turned on. If so, go to step 18. In step 18, it is judged whether or not the timing of the energization timing means 57 has reached the set energization time. If the determination is no, the process returns to step 17 until the timing of the energization timing means 57 reaches the set energization time. The operations of steps 17 and 18 are repeated.

When the time measured by the energization timer 57 reaches the set energization time, it is judged as YES in step 18 and the process proceeds to step 19. In step 19, the heater 21 is de-energized and the bread is baked according to the baking condition set by the setting switch 31.

In step 20, the timing of the energizing and counting means is stopped, the process returns to step 1, and the operations of steps 1 to 3 are performed.

On the other hand, the baked bread is opened by opening the door 25, the second piece of bread is put and the door 25 is closed. This allows
In step 4, it is judged as yes and the operations of steps 7, 8 and 9 are repeated, and the time when the door is opened is measured by the opening timing means 55. Then, when the start switch 33 is pressed, the operations in steps 9 to 12 are performed, and in step 13, it is determined how many times the bread is to be baked. Since it is the second baking, the process proceeds to step 14a, where the subtraction correction time Tα is calculated.

The subtraction correction time Tα is calculated by the correction time T according to the number of bakings, the non-energization time and the previous energization time.
a is calculated, and the correction time Tb is calculated based on the time when the door is opened, and Tb is subtracted from Ta to calculate the subtraction correction time Tα (= Ta-Tb).

This is because when the door 25 is opened, the heating chamber 1
5 and the temperature of the inner case 20 and so on suddenly drop,
The energization time corresponding to the temperature decrease is extended to keep the baking condition constant.

In step 15, 1 obtained in step 12
An energization time (T-Tα) is determined by subtracting the subtraction correction time Tα from the current energization time T. That is, in this step 15, the energization time T is corrected by subtracting the correction time Ta corresponding to the number of baking times, the non-energization time and the previous energization time from the set energization time T, and the corrected energization time ( The correction time Tb based on the opening time of the door is added to (T-Ta) to correct the energization time (T-Ta).

Then, the operations of steps 16 to 20 described above are performed, the heater 21 is energized for the energization time (T-Tα), and the bread is baked and the process returns to step 1.

As described above, these operations (steps 1 to 20) are repeated every time bread is baked. Then, in steps 14a to 14n, the energization time of the heater 21 is corrected in accordance with the non-energization time, the energization time, the opening time of the door 25, etc. in addition to the number of baking times.
This makes it possible to keep the bread baking condition always constant regardless of the non-energization time and the length of time the door 25 is opened.

In the above embodiment, the case of baking bread has been described, but the present invention is not limited to this, and may be the case of baking meat, for example.

[0033]

As described above, according to the present invention, the opening detection member for detecting the opening of the door, the timing means for timing the opening of the door, and the energization time of the heater for cooking according to the timing time of the timing means. Since it is provided with a correction means for correcting the above, it is possible to always keep the baking condition of the food to be cooked regardless of the opening time of the door.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a heater control device for an oven toaster according to the present invention;

FIG. 2 is a perspective view showing the appearance of an oven toaster,

FIG. 3 is a side view in which a part of FIG. 2 is shown in section.

FIG. 4 is a perspective view showing a part of a state where the door of the oven toaster of FIG. 2 is opened.

FIG. 5 is a flowchart showing a part of control operation of the control device,

FIG. 6 is a flowchart showing a part of control operation of the control device.

[Explanation of symbols]

 15 heating chamber 21 heater 25 door 26 micro switch 50 control device 55 opening timing means 58 arithmetic control means

Claims (1)

[Claims] 1. An object to be cooked placed in a heating chamber is heated and cooked by a heater, and the energizing time set according to the energizing time, the number of energizing times and the non-energizing time of the heater up to the previous time is corrected. Corrected energization time In an oven toaster that energizes the heater to keep the baking condition of the cooked food constant, an opening detection member that detects the opening of the door that opens and closes the entrance of the heating chamber where the cooking food is taken in and out, and the previous When the opening detection member detects the opening of the door when the heater is not energized, which is the period from the end of heating and cooking to the start of the next heating and cooking, the timekeeping means for measuring the opening time and the timing of this timing means. An oven toaster, comprising: a correction unit that corrects the corrected energization time according to time.