JPS6026224A - Oven - Google Patents

Abstract

PURPOSE:To make it possible to simplify, even slightly, the complicated form of the front panel of the titled oven by flickering at least one of the constituting elements of a display lamp of a digital electroluminescent timepiece. CONSTITUTION:When a preheating button 3 is pushed, a signal for shifting the level from ''L'' to ''H'' is supplied to a terminal T of a display flickering circuit 27, and a terminal Q assumes a low level. Thus, the display form of the digital electroluminescent timepiece 2 changes from I to II. In other words, I represents a display form prior to the preheating, and II represents a display form during the preheating. Further, III represents a display form when the preheating is terminated, and IV represents a display form when the cooling time is set. As shown by II, colons 22 are simultaneously flickered to display that it is being preheated. Further, when the knob 9 of a changeover switch 8 is positioned on the cooking time display side, it shows that the display form of ''a'', and when the knob 9 of the changeover switch 8 is positioned on the time display side, it shows the display form of ''b''.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oven for cooking food in an oven chamber.

Conventional Structure and Problems Generally, in this type of oven, it is necessary to use some means to indicate that the preheating function is in operation (preheating) for the convenience of the user. A commonly used method is to place a pilot lamp at the front of the oven and keep it lit during preheating. However, in an oven equipped with a digital electric clock (d), if the above method is adopted, there will be a pilot lamp in addition to the time indicator light on the front surface, simplifying the front surface. In other words, in addition to the time indicator light, the front of the oven has various operating elements such as a switch button for starting preheating and a switch button for setting the heating cooking time, making it complicated. If a pilot lamp is added to this 1+, it becomes C1 and then double A1.It is desirable in terms of usability and design to simplify this complexity even a little.

OBJECTS OF THE INVENTION It is an object of the present invention to utilize the time display month of a digital electric watch to simplify the complexity as much as possible.

Structure of the Invention In order to achieve the above object, the present invention has a preheating function that heats the open oven to a set temperature before cooking food in the oven, and an indicator light (numbers, colons, etc. on a liquid crystal display). , a light emitting diode, etc.) to display the time, cooking time, etc., and at least one indicator light blinks during the preheating function operation (preheating). As a result, the oven is configured such that the display form of the indicator lamp is different from the display form before the preheating function is activated (state before preheating).

Description of examples Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a configuration diagram of a gas oven showing an embodiment of the present invention.

On the front of the gas oven body 1, there is a digital electric clock 2 that displays the cooking time, a preheating button 3 that is operated when preheating the oven interior 1°, a button 4 for starting cooking, and a button 4 that is used to start cooking. A stop button 5 that is operated to stop preheating and when ready to cook; a temperature setting device 6 that sets the temperature inside the oven to a temperature suitable for the food to be cooked; a cooking time setting button 7 that is operated when setting the cooking time; When displaying the time on the digital lightning display 2, the switch 8 is placed on the /j2 side, and when the cooking time is displayed on the right side, the changeover switch 8 is used. Equipped.

The gas oven main body 117J: Opens and closes the electromagnetic valve 13 to supply gas to the gas burner 14 to adjust the temperature inside the oven chamber 10. The solenoid valve 13 closes the solenoid coil 1 according to a signal from the control circuit 11.
2 supplies gas to the gas burner 14 when energized.

FIG. 2 shows an indicator light 20 showing the overall configuration of the control circuit 11.
It consists of a four-digit number block indicator light 21, and two colons 22 provided in the center. Each number block indicator light operates digitally, and can be used to display the time or set cooking time depending on the position of knob 9, or to display the remaining cooking time by sequentially subtracting from the originally set cooking time as time passes. used for.

The display driving circuit 23 controls the display form of the digital electric timepiece 2 using output signals from the time counting circuit 24, the display blinking circuit 27, the display switching circuit 34, and the temperature control circuit 36.

Time count circuit 24id When the cooking time setting button 7 is operated, the set cooking time signal from the cooking time setting circuit 25 is memorized, and when the cooking start operation button 4 is operated, the set cooking time signal circuit 26 is counted. A start command signal is input and the display driving circuit 23 is instructed to display the situation on the digital electric clock 2.

Further, while the set cooking time is being counted, an HJ level signal is output from the output terminal a, and at the same time as the counting ends, the signal is switched to the L level (hereinafter referred to as r).
LJ level is one of the digital signals, and in this embodiment, it means o■, and HJ level is another signal, which means E■ [power supply voltage].) Also, when the cooking time setting button 7 is operated, , an "H" level pulse signal is output from the output terminal C.

The display blinking circuit 27 outputs a command (i;) that causes the two colons 22 in the digital electric hour clock 12 to blink at the same time. In other words, the Q terminal signal of the display blinking circuit 27 is at the 1LJ level, and the 11" power terminal is l'-H.
Colon 22 is made to blink when the signal is at J level, all indicator lights are turned off when the Q terminal signal is rLJ, l external force terminal is 1-L, and no effect is given when the Q terminal signal is 1-'HJ. The display drive circuit 23 depends on other input signals. The operation of the display blinking circuit 27 is such that when the PR terminal is at the rHJ level, the Q terminal is at the rHJ level, and the ◇ terminal is at the "L" level.
He will be kept under J-level protection. On the other hand, the PR terminal is rL
At J level, when a rising signal that changes from "L" to rHJ level is input to the T terminal, the Q terminal becomes "L" L J
level, ◇terminal UrHJ level -) and maintains that state.

The display switching circuit 34 inputs a signal corresponding to the position of the knob 9 of the changeover switch 8 to the display drive circuit 23, and can arbitrarily select the display form of the digital electric clock 2 between time display and cooking time display. That is.

The temperature control circuit 35 compares the temperature set by the temperature setting device 6 and the temperature in the open refrigerator 10, and outputs an lHj novel signal when the temperature inside the refrigerator is lower than the set temperature, and when it is higher than the set temperature. The lLJ level signal is output from the output terminal. Note that when the output terminal is at the rLJ level, if the Q terminal of the display blinking circuit 27 is at the rLJ level, the display drive circuit 23 is instructed to turn off the entire display of the digital electric clock 2.

When the preheating button 3 is pressed, the contact 36 closes and a signal is input to the T terminal of the display blinking circuit 27 to change from "LJ" to "H" level.

When the stop button 6 is pressed, the contact 38 closes and the rHJ level signal is input to one input terminal of the OR circuit 28.

The AND circuit 30 outputs an "H" level signal Qk to its output when the two inputs are at the lHJ level at the same time, and at that time, the transistor 33 is switched on and the electromagnetic coil 12 is turned on.
to open the solenoid valve 13. Note that the resistor 32 is for limiting the base current, and the resistors 3 and 39 are for pull-down. The 1/1 diode 31 is used to protect the transistor 33.

Below, I will explain the functions and connection relationships of each part/(, but once again I will systematically explain the whole using Figure 3.

When you are about to start cooking without cooking, you preheat the inside of the maven and heat it to an appropriate temperature in small steps. That is, when the preheating button 3 is pressed here, a signal that changes from fLJ to the "H" level is input to the T terminal of the display blinking circuit 27! The L and Q terminals go to the rLJ level, and the display form of the digital lightning clock 12 changes from ■ to H shown in FIG.

1 in FIG. 3 is the display form before preheating, and 11 is the display form during preheating. In addition, ``River'' indicates the display format at the end of preheating, and ``■'' indicates the display format when cooking time is set. In this embodiment, as shown in H, the colon 22 flashes at the same time to indicate that preheating is in progress.

Further, when the knob 9 of the changeover switch 8 is on the cooking time display side, the display mode A is shown, and when it is on the time display side, the display mode is shown. In other words, when displaying the time, the time and cooking time are distinguished by adding or adding an AM or PM display.

As described above, the Q terminal of the display blinking circuit 27 goes to the "L" level, while the ◇ terminal goes to the rHJ level.

As a result, the output of the OR circuit 29 is such that one of the inputs is [HJ
The rHJ level signal is automatically input to one side of the AND circuit 30. The other input terminal of the circuit 30 is connected to the output of the temperature control circuit 36. At the beginning of preheating, the temperature inside the refrigerator is low, so the output terminal is at the rHJ level. Therefore, the output of the AND circuit 3o becomes rHJ level, the transistor 33 is switched on, gas is supplied, and the inside of the refrigerator is heated.

As the temperature inside the refrigerator gradually heats up and reaches the set temperature, the output terminal becomes LJ level "l" than HJ, so the output of the AND circuit 30 becomes rLJ level, and the toner transistor 33 turns off. Gas supply is cut off. At this time, when the output terminal level changes from rHJ to rLJ level, that is, when preheating is completed, the display form on the digital electric light side 2 changes to Fig. 3 (3) to notify the completion of preheating. Also, in synchronization with the output terminal, the transistor 330
By turning it on and off repeatedly, you can keep the temperature inside the refrigerator at the set temperature.

Next, after confirming the completion of the preheating described above, put the food to be cooked in the open refrigerator and operate the cooking time setting button 7.
“H” level Noculus (N””I is output from
The Q terminal of the display blinking circuit 2 becomes rHJ level, and the display form of the digital electric clock 2 becomes ``■'' in FIG. 3. The function of the Q terminal output in this embodiment is to give an instruction to simultaneously blink the two colons 22 on the digital electric clock 2 when the output terminal status is rHJ, and to
When the signal of the output terminal becomes "L", it is digital lightning time 8
As already mentioned, all 12 indicator lights are turned off.

Moreover, FIG. 3 1■ shows the state when the cooking time is set to 25 minutes. It goes without saying that at this time, the selection switch 9 of the changeover switch 8 is set to the cooking time display side.

Then, the user presses the cooking start operation button 4 to start cooking. An "H" level is output to the output terminal a, and gas is supplied by the outputs of the OR circuit 29 and the AND circuit 3o as described above. Then, when the cooking time ends, the output terminal a
When rF(J becomes "L" level, Of(circuit 29
Since the other input terminal remains at the rLJ level, the l transistor 33 is turned off and the gas supply is stopped.

In this case, the remaining cooking time can be easily determined by decrementing the display on the digital electric clock 2 with the elapsed time, and changing the display to the mode shown in FIG. 3I at the end of cooking.

In addition to the means of notifying the end of preheating by turning off all indicator lights, it is also possible to use a means of notifying the end of preheating with a buzzer sound.

Effects of the Invention As described above, the present invention has made it possible to realize a new means of preheating notification that eliminates the pilot lamp for preheating in oven equipment that has 1180% digital lighting. By blinking at least one indicator light of each component of the digital electric timetable indicator light, this is used as a means of notification that preheating is in progress, and the display formats before and after preheating are different for cooking. person can easily know the preheating status.

It will be easier to understand if the two colons in the center of the digital electronic clock 1 are made to blink at the same time during preheating as in the above-mentioned embodiment.

This eliminates the need for other notification devices such as a pilot lamp, and prevents the 1% iJ problem in which the addition of a pilot lamp makes the oven operation surface more complicated.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of a gas oven showing an embodiment of the present invention, Fig. 2 is a control circuit diagram of the oven, and Fig. 3 is an explanatory diagram of the operation of the digital electric clock. - Gas oven body, 2...Digital lightning clock, 1o...Oven interior, 20...
・-“PM” indicator light, 21...-Number block indicator light,
22...Colon. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 5S3

Claims (1)

[Claims] Before cooking food in the oven, the oven has a preheating function that heats the oven to a set temperature in advance, and an indicator light (numbers, colons, etc. formed with liquid crystals, light emitting diodes, etc.) that shows the time, It is equipped with a digital electric light clock that displays the time for heating and cooking, etc., and by blinking at least one indicator light while the preheating function is operating (preheating), the display form of the indicator light can be changed to the time before the preheating function is operating. (a state before preheating).