JPS603005A - Roasting controller of oven toaster or the like - Google Patents

Abstract

PURPOSE:To obtain a device of simple structure with high reliability and precision which starts a self-roasting and a timer function with one knob by providing a means which decides on whether the voltage of a variable resistor is higher or lower than a specific voltage from output variation of a comparator. CONSTITUTION:The specific-voltage high/low deciding means decides on whether the voltage of the set variable resistor is higher or lower than the specific voltage from output variation of the comparator. For example, when a switch 15 is turned on to power on a heater 13, a control means 6 generates the specific voltage, and the specific-voltage high/low deciding means 4 in a microcomputer 9 decides on whether the set voltage 1 of the variable resistor is higher or lower than the specific voltage on the basis of the output variation of the comparator 3. When it is decided that the voltage is higher, a control voltage generating means 2 generates a control voltage as a function of time from the specific voltage to a maximum voltage, and when it is decided that the voltage is lower, the control voltage is generated as a function of time from the specific voltage to a minimum voltage. Then, a set-voltage coincidence deciding means 5 decides on whether the control voltage coincides with the set voltage or not.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is an oven having an automatic bread roasting function!・−
The present invention relates to a roasting side leg device which has the same functionality as the above for appliances such as starters, toasters, and ovens.

Conventional column configuration and its problems Conventional toaster ovens with automatic roasting function (hereinafter referred to as self-roasting function) use a mechanical timer for the long R function such as gratin, and the self-roasting function of bread Since accuracy is required, we use an electronic timer, and the product requires two knobs: a mechanical timer knob and a variable resistor knob for the Nariko timer, which is inconvenient to use. , which was also a factor in the manufacturing cost map.

There was also a device that used a step motor to combine the self-rotating and timer functions into a single knob, but the structure was complex and unreliable.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and provides a roasting control for oven toaster, etc., which performs the self-roasting function and the timer function with a single knob, has a simple structure, is reliable, and has high accuracy. The purpose is to provide equipment.

Structure of the Invention In order to achieve the above object, the present invention provides a specific voltage level determining means for determining whether the voltage of a set variable resistor is high or low with respect to a specific voltage by a change in the output of a comparator; After that, a control generating means for changing the controllable voltage as a function of time from an arbitrary voltage is provided, and when this controllable voltage matches the voltage of the set variable resistor after a certain period of time, it is detected by a comparator. and a heater-off means that turns off the heater based on the determination means. According to this configuration, when the set voltage is higher than the specific voltage by the specific voltage high/low discrimination means, If you judge that,
The flj control voltage generating means generates a voltage higher than the specific voltage that can be controlled as a function of time, and when the set voltage is reached, the set voltage coincidence determining means operates and the heater off means turns off the heater. Similarly, if the set voltage is lower than the specific voltage, the same function as above will work.
Two completely different times can be set with one variable resistor.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1 is a set voltage, which sets both the self-flux function and the timer function, and is the sole power of the comparator 3. Reference numeral 2 denotes a fist pressure generating means, which is connected to the external power of a comparator 3, and is controlled by a control means 6 to generate a specific voltage or a time-function cardiac pressure. Reference numeral 4 denotes a specific direct voltage level determining means for determining whether the set voltage is higher or lower than the specific voltage when the control direct voltage generates a specific voltage. A control voltage of a time function is generated from the 1-murder generating means 2 through the means 6, the setting rlf and j king are determined to match by the setting coincidence determining means 6, and the mlJ control means 6 is used to turn off the heater 7. and turn off the heater.

FIG. 2 is a circuit diagram showing a specific configuration of this embodiment.

1 is a variable resistor that is a set voltage, and its movable piece is connected to the power of the comparator 3. One end is connected to the positive terminal of the DC power supply, the other end is connected to the ground, and the other end is connected to the other power of the comparator 3. The human power of the D/A converter 11 is connected to a microcomputer 9 (hereinafter referred to as microcomputer) to generate a control voltage. The output of the comparator 3 is connected to the microcomputer 9, which determines whether the specific voltage is high or low and determines whether the set voltages match. 12 is a thyristor, the anode of this thyristor 12 is connected to one end of the heater 13, and the gate is connected to the resistor 1.
One end of the microcomputer 9 is connected to the microcomputer 9, and the cathode is connected to the ground. The other end of the heater 13 is connected to a commercial AC TG14 via a switch 15. The other end of the resistor 1Q is connected to the positive side of the DC power supply.

Next, the operation of this embodiment will be explained. Figure 3 shows microcomputer 9
This figure shows the main part of the flowchart according to the control.

Generally, when the switch 15 is turned on, the gate υ) of the thyristor 12 is turned on, and when the heater 13 is energized in step 16, the control means 6 adjusts the sleeping pressure of the thyristor J1 in step 17.
Generates a more specific voltage. At that time, depending on the setting position of the 1st variable resistor 1, in step 18, whether the set voltage is higher or lower than the specific voltage is determined by the change in the output of the comparator 3, and the specific voltage level discriminating means 4 in the microcomputer 9 determines whether it is high or low. If the pressure is high, in step 19, J is sent to the control heart pressure generating means 2.
:Restriction i+llI Voltage is generated as a function of time from a specific voltage to the maximum pressure, and when it is low, i' is generated in step 20.
The 1flJH voltage generating means 2 generates a control voltage from the specific voltage at 1t and a small jL pressure at a time of 111a. Then, in step 22, the set voltage match determining means 6 determines whether the control voltage and the set voltage match, and step 23
The thyristor 12 of the microcomputer 9 is turned off by the heater-off means a.
The terminal to the gate is turned off, and the communication to the heater 13 is stopped. If they do not match, the process returns to step 17, a specific voltage is generated as the control voltage, and the process proceeds to the following steps.

After the specific voltage level discrimination means 4 determines whether the voltage is high or low, the result of the high/low determination is temporarily stored in the storage means 8. When the set voltage is moved beyond the specific voltage, in step 21, the specific voltage level discrimination means 4 It is determined whether or not the height determination is the same as the previous result. If it is the same, proceed to the next step 22; if different, proceed to step 23, and turn off the heater 13. For this purpose, a set voltage change detection means (not shown) is provided to improve the ease of use of the toaster oven.

To explain in more detail, FIG. 4 shows the relationship between the voltage of the variable resistor 1, which is the set voltage, and the rotation angle, and the set voltage is varied from the minimum voltage ■ml1 to the maximum voltage Vmaxi.

FIG. 5 shows the knob 1a of the variable resistor 1, which is the setting voltage, and its panel, half showing the timer function and the other half showing the self-fusing function. Now, the specific voltage is shown in FIG. intermediate voltage V
When set to mid, if the set voltage is between the intermediate voltage and the maximum voltage (i.e. self-flux function), the specified voltage (Vmid
) is determined to be high by the specific voltage level discrimination means 4, and then the fall cape pressure generating means 2 gradually increases the restraint pressure from the specific voltage (Vmid) to the maximum pressure as a function of time. The heater 13 is turned off by the heater off means 7 at a voltage (ie, time) that matches the set voltage. If the set voltage is between the minimum voltage and the intermediate voltage, it is determined as low by the specific voltage high/low discrimination means 4,
Thereafter, the control voltage generating means 2 gradually lowers the control voltage from the specific voltage to the minimum voltage as a function of time, and turns off the heater 13 at a voltage that matches the set voltage. In this way, one variable resistor 11 provides two time settings with B+J functions.

Effects of the Invention As described above, according to the present invention, one variable resistor can perform the self-flux function and the timer function, is easy to operate, has a simple structure, and has greatly improved reliability. 1. Even when the setting is changed from timer to self-fusing (or from self-fusing to timer), the heater is turned off, so the self-fusing function and timer function are clearly distinguished, which is very convenient for use. It also has the effect of reducing the number of parts in manufacturing, making it easier to assemble 1,1ζ11. Although the embodiments have been explained based on a toaster oven, the same effect can be expected in ovens, toasters, etc.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the main parts of a toaster oven showing an embodiment of the present invention, Fig. 2 is a specific circuit diagram thereof, Fig. 3d is a flowchart of the main parts, and Fig. 4 (rl, I1 Figure 5 is a front view showing the knob and panel. 1... Setting t voltage (variable resistor), 2...
・Reduction pressure generation means, 3... comparator, 4...
Eye/Specific voltage high/low discrimination means, 5...Setting heavy pressure coincidence discrimination means, 6...Side support 1 means, 7...Heater off means, 8..."1 self f" , -Kutejho, 9-
--Microcomputer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 7/ q Figure 3 Figure 4I21 Figure 5 H Chokujote Genmoki Sangyo Co., Ltd.

Claims (2)

[Claims] (1) A specific voltage high/low determination means for determining whether the set i■ variable resistor voltage is high or low with respect to a specific voltage by a change in the output of a comparator, and after determining the high or low voltage by this means, the control r? 9' Control voltage generation means that changes the controllable voltage from an arbitrary voltage as a function of time, and when this controllable voltage matches the voltage of the set variable resistor after a certain period of time, it is output from the comparator. A roasting control device for a toaster oven or the like, comprising a set cardiac pressure coincidence determination means that determines based on a change, and a heater off means that turns off a heater based on the determination means. (2) Roasting control of an oven toaster or the like according to claim 1, which includes a storage means for storing the determination made by the hemorrhoid constant voltage level determination means, and turns off the heater when the result is different from the previous height determination result. Device.