JPH0257824A - Heater device - Google Patents

Abstract

PURPOSE:To alarm a left condition of a pre-heated state and prevent a blank heating by a method wherein after a preheating is finished within a heating chamber, a completion of preheating is displayed at a display part and at the same time a sound generator is energized and this energized state is continued by a time a door is opened or a switch is turned on. CONSTITUTION:A heating operation is started by a heater placed in a group 11 of accessory heat generating sources, a temperature within a chamber is detected by a temperature sensing element 8 and converted into an analogue volume at an A/D converter 7b of a micro-computer 7. This analogue volume is compared with a set temperature stored at RAM part and as a relation of (a set temperature) <= (a present temperature) is fulfilled, a Piezoelectric buzzer 12 acting as a sound generator is energized and segments 4c1 and 4c2 showing a completion of preheating operation under open state are illuminated. The Piezoelectric buzzer continues to ring until the door is opened or a buzzer stop key is inputted. With this arrangement, upon completion of the preheating operation, a case in which the buzzer is left without any acknowledgement is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating device such as a microwave oven,
More specifically, the present invention relates to a heating device that can reliably notify a user of the end of preheating mode in a heating chamber.

Conventional technology Generally, in a microwave oven with an open function, when preheating the inside of the refrigerator to a desired temperature, the inside temperature is set and a temperature detection element is used to heat the inside of the refrigerator until the set temperature is reached. . When the temperature inside the refrigerator becomes equal to the set temperature, the system notifies the user that preheating is complete by activating a sounding device such as a piezoelectric buzzer for a short period of time (about 5 seconds) and displaying the temperature inside the refrigerator. .

Problem to be solved by the invention However, it is difficult to use a sounding body such as a piezoelectric buzzer for a short period of time (about 5 seconds).
If you just start it up, the user will not know (but if you leave it as it is, the so-called "karayaki" will continue.This "karayaki" will return to the all-off mode 48 minutes after the start of preheating, but This "grilled" state is not suitable for microwave ovens.

Therefore, an object of the present invention is to provide a heating device that eliminates the above-mentioned problems.

Means for Solving the Problems In the present invention, after the preheating of the inside of the refrigerator is completed, the completion of preheating is displayed on the display section, the sounding element continues to be activated, and the door is opened or not.
This is a heating device that stops the activation of the sounding body when a switch is input to stop the activation of the sounding body.

When the preheating of the inside of the oven is completed, the sounding unit is activated and a message indicating that the preheating is complete is displayed. When the user notices this and opens the door or presses the SUI/SOCH key to cancel activation of the sounding body, the activation of the sounding body is halted. Furthermore, when you press the switch, preheating continues until the maximum limit time.

Example ``Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a heating device according to the present invention.

A door body 2 is pivotally supported on the front surface of the main body 1 so as to be freely openable and closable, and an operation panel 3 is provided. FIG. 2 shows an enlarged view of the operation panel 3, and FIG. 3 shows a block diagram of the control circuit of the heating device of the present invention. In the figure, 7 is a microcomputer (hereinafter referred to as microcomputer), approximately 10 meters (input and output section).
The cpυ (central information processing unit) 7o and the A/D converter 7b are connected via the CPU 7e, and the A/D converter 7b is connected to the CPU 7e. Dedicated storage device) 7d
The configuration is such that they are combined. Also, at the terminal of the microcomputer 7, there is a temperature detection element 8 whose analog value changes depending on the temperature.
is connected. Further, an encoder 6, which is a knob for setting numerical values such as heating time, is connected to a terminal of the microcomputer 7.

Furthermore, a pulse generation circuit 9 necessary for the microcomputer 7 to measure heating time, etc. is connected to the terminals of the microcomputer 7, and a display section 4 is also connected. This display section 4 has a segment (4 m) indicating a temperature scale.

A segment group 4b (15 segments) indicating the set temperature and internal temperature, a segment group 4o indicating the cooking menu, a segment group 4 indicating numbers, and a segment group indicating the unit of time are arranged.

In addition, the terminal of the microcomputer 7 has function switch groups 5a to 56% for selecting the necessary heating function, and a buzzer stop switch 5 that stops the buzzer when inputted while the buzzer is sounding.
-Time setting switch 5f.

Temperature setting switch 5g to 5h, heating start switch 5I
, the cancellation switch 5j is connected, the high frequency generation source 10 and other attached heat generation source groups 11 such as heaters are connected,
Furthermore, a piezoelectric buzzer is connected as a sounding body.

On the other hand, the ROM section 7 of the microcomputer 7 has a function of displaying a segment of the display section 4 that is suitable for a predetermined heating function when a predetermined heating function is selected from the function switch group 5--5e, and also a function of displaying a segment of the display section 4 that is suitable for this function. It has the function of performing prescribed heating. Further, in the ROM section 7 of the microcomputer 7, when a predetermined heating function is selected and the temperature setting switches 5Q to 5h are input, the set temperature is displayed on the display section 4b as energy f', and j '? This is because the AM section 7d has the function of storing data. Furthermore, the ROM section 7e of the microcomputer 7 has the function of storing the heating function set by the predetermined function switches 51 to 5d and the heating time number set by the encoder 6 in the RAM section 7d. . Furthermore, when the heating start switch 5I is input to the ROM section 7 of the microcomputer 7, the high frequency heat source 10 or other attached heat source 11 such as a heater is operated based on the heating contents stored in the RAM section 7d. It has the function of opening the heating and controlling these heat generation sources based on the above-mentioned heating temperature and heating time that are measured separately, and when the cancel switch 5 is input, the RAM section 7- is It has the function of erasing the stored contents. Furthermore, the ROM section 7 of the microcomputer 7 is provided with the function of counting the time signal added via the pulse generating circuit 9 to measure the heating time. Furthermore, the ROM section 7 of the microcomputer 7
* is provided with a function of displaying the progress of the heating contents on the display section 4 after the heating starts. Furthermore, the microcomputer 7 has the function of inputting the analog data of the temperature detecting element 7 and converting it into a digital quantity in the A10 converter 7b.

Next, the operation of the present invention in such a configuration will be explained.

First, from the function switch group 5a to 5-, select a predetermined heating device, for example, the "open" key 5, which is a preheating function in the heating chamber.
Suppose that the user inputs m and sets the set temperature to 200°C using the "up" and "down" keys 5g and 5h. At this time, the RO of microcomputer 7
By the action of the M section 7e, the display section 4 displays the menu name segment 4C1 for open preheating, the temperature scale segment 41, and the temperature bar segment group 4b.
The amount of energy at 0°C is turned on, and furthermore, the RAM section 7d
Store "Open Preheat" and "200℃" in the memory. Here, "200℃J" is set in hexadecimal by the function of the ROM section.Next, by inputting the heating start switch 5I, heating is started by the heater in the attached heat generation source group 11, and the inside of the refrigerator is heated. The temperature is detected by the temperature detection element 8, and the microcomputer 7
It is converted into an analog quantity by the A/D converter 7b. This analog quantity is 14→ in the flowchart shown in FIG. 4(a).
The temperature is compared with the set temperature stored in the RAM section according to 15 → 16 → 17, and when (set temperature) ≦ (current temperature) at 17, the piezoelectric buzzer, which is a sounding body, is activated via the route 18 → 19. Segment 4C1 of completion of open preheating
, 402 blinks. 19 until the door is opened or the buzzer stop key is input.
E TJ flag is raised, re u z z number of times” 15
is set to This results in r
The BUZZONJ flag is set. Here, the number of times is ``
5", so rl 00m5 @ OJ (7)r
The BLjZZONJ flag is set five times. Also, since it always passes through 19, the state of t
By setting 1GH and LOWJ, the piezoelectric buzzer will continue to sound during the transition from 25 to 26 in Figure 4 (-), which is set at the beginning of the interrupt. To stop this buzzer, open the door or press the buzzer button key 56 as shown in FIG. 4 (bl, +<11).

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The user can surely know that the preheating is completed by hearing the buzzer continuously.

(2) When the preparation for putting the heated object into the heating chamber is completed, the buzzer stops when the door is opened.

(3) When preparations for placing the heated items into the heating chamber are not completed, the buzzer can be stopped by inputting the "buzzer stop key", and the temperature inside the chamber can be maintained as it is.

(4) Since the user will not leave the heating chamber unattended after preheating is completed, the durability of the heating chamber etc. can be maintained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main body of the heating device showing an embodiment of the book, Fig. 2 is an enlarged front view of the opening operation panel, Fig. 3 is a block diagram of the opening control circuit, Fig. 4 (al is Flowchart for setting the buzzer in the main program, FIG. () is a flowchart for serial output within the same interrupt. 1...Main body, 2...Door body, 3...
··control panel. 4... Display section, 4 Insect... Temperature scale, 4
b...Temperature par, 5...Input section, 5a
~5-...Function switch, 5...Buzzer stop switch, 5f...Clock switch, 5g~5h...Temperature setting switch, 5t...・
...Cooking start switch, 5J...Cancel switch, 6...Encoder %7...Microcomputer, 7 Hatake...110.7b・・・
...A/D conversion section, 7c...CPU, 7-
......-RAM section, 7...ROM section, 8
... Temperature detection element, 9 ... Pulse generation circuit, 10 ... High frequency generation source, 11 ...
- Attached heat source group, 12...Piezoelectric buzzer 13.
...Serial output terminal, 14 to 19...
・Flowchart for setting the buzzer during open preheating (in main). 20~21.22~24... Flowchart to stop the buzzer setting after opening preheating is completed (in main)
. 25-26... Flowchart for serial output (within interrupt). Name of agent Patent attorney Shigetaka Awano and 1 other famous confectionery diagram 5 - Human resources department

Claims (1)

[Claims] a heating chamber, a door body, a sounding body, an input section for inputting numerical information, functional information, temperature information, etc., a display section for displaying numerical information, functional information, temperature information, etc., and a display section for displaying the temperature inside the heating chamber. a temperature detection element to detect, a heating means provided in the heating chamber, the sounding body, the input section, the display section,
In a mode that includes the temperature detection element and a control section that controls the heating means, and heats the inside of the heating chamber to a temperature set by the input section, the set temperature;
When the temperatures in the heating chamber detected by the temperature detection element become equal, the sounding body is activated at regular intervals, and the door body is opened or a specific switch provided in the input section is input. By doing so, the heating device stops activation of the sounding body and displays on the display section that the detected temperature and the set humidity have become equal.