JPS6361823A - Heating cooker - Google Patents

Abstract

PURPOSE:To permit the inspection of a temperature sensor and a discriminating means simply without employing a different inspecting apparatus, by a method wherein a temperature during detection and a set position during discriminating operation at present time are read and the number of units contained in the numerical values of the reading is counted to drive an indicating means by the number of times corresponding to the number of units counted. CONSTITUTION:A thermistor 3 generates a voltage drop in accordance with a detected temperature, therefore, a voltage, in accordance with the detected temperature, appears in the other terminal of the thermistor 3. This voltage is inputted into a comparator 37 and the detected temperature of the thermistor 3 can be known by a digital signal from a microcomputer 36 at the time point of the change of output of the comparator 37. Operations to know the digital signal is effected by a method wherein a detecting temperature theta is divided by a unit number 50 to obtain a quotient (n) and a remainder (m), subsequently, the remainder (m) is divided by an unit number 10 to obtain a quotient (p) and, then, the fraction of the quotient (m) is processed. As a result, buzzer driving signals, whose number of times is corresponding to the quotient (n), are sent into a buzzer driver 48. Subsequently, LED driving signals, whose number is corresponding to the quotient (p), is sent to a LED driver 49. According to this inspection, the abnormality of the operation of the thermistor 3 may be confirmed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to heating cooking utensils, and more specifically,
The present invention relates to a heating cooking appliance that sets a cooking temperature according to the content of cooking, detects the temperature of a pot with a temperature sensor, and automatically adjusts the heat power.

<Prior Art> The heating cooking appliance described above is equipped with a temperature sensor made of a thermistor that comes into contact with the bottom of the pot to detect the temperature of the bottom of the pot. Then, a mode changeover switch is used to set the optimum cooking temperature according to the cooking content. The set position of the mode changeover switch is identified by an encoder built into the heating cooking appliance as identification means, and a predetermined heat power adjustment is performed based on the cooking temperature at the set position. Additionally, a timer switch is used to set the time until the fire is extinguished. The set position of the timer switch is also identified by an encoder, and when the time corresponding to the set position has elapsed, the gas supply is cut off and the fire is automatically extinguished (Special Publications Publication No. 1983-
(See Publication No. 4734).

The function of detecting the temperature and identifying the set position is an extremely important function for heating cooking appliances that automatically adjust the firepower, so temperature sensors and identification means that perform the above functions have traditionally been required to be inspected. It is given.

<Problems to be Solved by the Invention> However, in the past, inspection of temperature sensors, for example in the case of a thermistor, was carried out by simply measuring the resistance value of the element, and inspection of the identification means was carried out, for example, by measuring the resistance of the element. If so, this was done by checking continuity between terminals.

For this reason, it is necessary to prepare a measuring device such as a tester or special inspection equipment, and the amount displayed by the meter must be read visually, making it difficult for inspectors to perform measurements easily. There was a problem.

<Purpose of the Invention> The present invention was made in view of the above problems, and provides a heating cooking appliance that allows the temperature sensor and identification means to be easily inspected without using separate inspection equipment. The purpose is to provide.

Means for Solving Problems> In order to achieve the above object, the heating cooking appliance of the present invention uses either a numerical value corresponding to the detected temperature of the temperature sensor or a numerical value representing the identified setting position of the identification means. a reading means for reading one or both; a calculating means for counting how many 1 units are included in the read numerical value; a display means; driving the display means a number of times corresponding to the number counted by the calculating means. It is equipped with a driving means for

The display means consists of two display means, and the number of units is two large and small, and the calculation means calculates the number of large units included in the numerical value, and converts the number of units into the large number of units from the numerical value. This method calculates the number of small units included in the remaining number after subtracting the multiplied number, and the driving means drives one display means based on the number of large units, and also displays the number of small units. The other display means may be driven based on the number of display means.

Function〉 If the heating cooking appliance has the above configuration, it reads the temperature currently being detected and the setting position currently being identified, counts how many units are included in the above value, and measures the number of units corresponding to the number of units. Drive the display means. The inspector simply counts the number of times the display is displayed and multiplies the counted number of times by a certain number determined by the number of units mentioned above. You can know either one or both.

Further, the display means is composed of two display means, two large and small units are prepared, the number of large units included in the above numerical value is determined, and one display means is driven by the number of times. , if the number of small units included in the remaining value is obtained by subtracting the number of large units multiplied by the number of units from the above numerical value, and the other display means is driven only the number of times, The inspector counts the number of times the display is performed on one display means and multiplies it by a certain value, counts the number of times the display is performed on the other display means, multiplies it by another fixed value, and calculates both results. Just by adding
Either or both of the temperature detected by the temperature sensor and the position identified by the identification means can be known.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a perspective view showing a heating cooking appliance of the present invention. The heating cooking utensils (1) are the left stove (4) and the right stove (1).
2) and a grill (11). Left cone opening (2
) consists of a burner (4), a trivet (7) on which to place the pot, and a trivet (soup pan (6) placed under the sword), etc., and a temperature sensor in the center of the burner (4) to measure the temperature of the pot. A thermistor (3) is provided so as to protrude slightly from the top surface of the trivet (sword).A boiling cover ring (S) is fitted around the burner (4) to prevent spilled liquid from heating the cooking utensil [1] Be careful not to go inside.

On the front of the left stove (2) side, there is an appliance plug knob (10) for igniting, extinguishing, and adjusting the firepower of the stove.Also, on the front, you can adjust the optimal cooking temperature according to the cooking content. A mode switching knob (8) for setting and a timer knob (9) for setting the time until extinguishment are attached. At the bottom of both knobs (8) and (9), there is an L E D as a display means. (4B) and buzzer (47
) is provided.

The mode switching knob (8) and the timer knob (9) are slidable and can each indicate 16 positions.

In addition, on the front of the right stove (12) side, the right stove (12)
Also attached are appliance plug knobs (13) and (14) for igniting, extinguishing, and adjusting the firepower of the grill (11).

(50) is an inspection mode setting switch.

FIG. 2 is a block diagram of an automatic inspection system for heating cooking appliances of the present invention.

A constant bias voltage is applied to one end of the thermistor (3) from a battery (39) via a switch (4o). Since the thermistor (3) produces a voltage drop depending on the detected temperature, a voltage corresponding to the detected temperature appears at the other end of the thermistor (3). This voltage is determined by the comparator (37
) is entered. On the other hand, a plurality of sweep digital signals are inputted to the D/A converter (38) from the microcomputer (36). Then, the D/A converter (38) outputs an analog signal that changes over a predetermined period and a predetermined amplitude range in accordance with the sweep digital signal, and inputs it as a reference voltage to the comparison terminal of the comparator (37). Ru. Therefore, by knowing the digital signal at the time when the output of the comparator (37) changes, it is possible to know the temperature detected by the thermistor (3).

The mode selection switch (43) is the mode selection knob (8
) to set the cooking mode. As a cooking mode, you can choose from ``Manual'' mode, which heats up manually, ``Automatic Extinguishing'' mode, which automatically turns off the heat when the set temperature is reached, and ``Temperature Adjustment'' mode, which lowers the heat to low and maintains the temperature once the set temperature is reached. can.

Furthermore, you can set two types of temperatures in the "automatic extinguishing" mode, and four types of temperatures in the "temperature adjustment" mode.
Multiple settings can be made in other modes as well.

For this purpose, a total of 16 modes can be set.

The timer switch (44) is connected to the timer knob [9].
] to set the time until extinguishment. The timer switch (44) has a total of 1 settings from "3 minutes" to "continuous".
It is possible to set the time in 6 different ways.

The above mode selector switch (43), timer switch (
44) are connected to a common encoder (45), which can identify the set position of any switch and sends a code signal representing the identified set position to the microcomputer (3B).

The microcomputer (36) controls the timer switch (
44), simply specify the right end position using the mode switching knob) 8). At this time,
The microcomputer (36) has a timer switch (
44) can only be read. When reading the arbitrary setting position of the mode changeover switch (43),
All you have to do is specify the right end position using the timer knob (9).

At this time, the microcomputer (36) can read only the setting position of the mode changeover switch (43).

When reading the temperature detected by the thermistor (3), it is sufficient to set the mode switching knob (8) to a predetermined position other than the right end. ) can read the temperature detected by the thermistor (3).

The microcomputer (36) is connected to an LED (4G) and a buzzer (47) via drivers (48) and (49), respectively. The microcomputer (36) as a driving means displays the L E D (4B) as a display means a number of times corresponding to a value corresponding to the temperature detected by the thermistor (3) and a value representing the position identified by the encoder (45). ), which drives the buzzer (47).

The inspection switch (50) connected to the microcomputer (36) is a switch that switches to inspection mode by grounding a predetermined terminal of the microcomputer (36).

An inspection operation using the above configuration will be explained.

First, close the inspection switch (50). Next, when the device stopper knob (10) is pushed and turned, the switch (40) closes and the microcomputer (36) is disconnected from the dry battery (39).
), the thermistor (3), etc., are supplied with power. At the same time, gas is supplied, the ignition means is driven, and the burner (4) is ignited.Then, referring to the flowchart in FIG.
0) is closed.

If the inspection switch (50) is not closed, the mode moves to another mode. If the inspection switch (50) is closed, the inspection mode is entered.

Next, in step (2), it is determined whether the mode switching knob (8) is located at the right end. If it is at the right end, an operation begins to read the setting position of the timer switch (44).

If it is not on the right edge, proceed to step ■ and turn the timer knob (
It is determined whether the indicated position in 9) is at the right end. If it is at the right end, an operation begins to read the setting position of the mode changeover switch (43). If it is not at the right end, the process proceeds to step (2), where it is determined whether the mode switching knob (8) is at a predetermined position other than the right end. If it is in the predetermined position, the reading operation of the temperature detected by the thermistor (3) begins. If it is not in the predetermined position, it moves to another mode.

Next, the reading operation of the mode changeover switch (43) and timer switch (44) will be explained. First, the mode switching knob (8) and timer knob (9) can be set to 16.
Number the positions in order from the left.

FIG. 4 is a flowchart showing the reading procedure for each switch (43), (44), and the signals representing the setting positions of the mode changeover switch (43) and timer switch (44) identified by the encoder (45) are , is converted into a numerical value equal to the above number in step (■).

Let this numerical value be i. In step (2), i is divided by a predetermined number of units, 5, to obtain the quotient and the remainder k. Next, in step ■, the buzzer drive signal is sent a number of times equal to the quotient j to the buzzer driver (
48). Next, in step (2), the LED drive signal is sent to the LED driver (49) a number of times equal to the remainder k. For example, if the identified position is the 13th from the left, the buzzer drive signal is sent out twice and the LED drive signal is sent out three times. As a result, the buzzer sounds twice and the LED lights up three times, so the inspector knows that the set position identified by the encoder (45) is 2X5+3-13th from the left. At the same time, the inspector should also press the mode switching knob (8),
Since the position actually indicated by the timer knob (9) is known, it can be confirmed whether the position identified by the encoder (45) is correct.

FIG. 5 is a flowchart showing the procedure for reading the temperature detected by the thermistor. Thermistor [3] in step [phase]
Read the detected temperature θ. In step ■, the detected temperature θ is 60
If it is less than °C, consider θ to be 60 °C in step ①,
If θ exceeds 210°C in step (2), θ is considered to be 210°C in step (2). The reason θ is limited to 60° C. to 210° C. is because this is within the normal usage range. In step (2), the detected temperature θ thus obtained is divided by the unit number 50 to obtain a quotient n and a remainder m. Next, in step [phase], the remainder m is divided by the number of units 10 to obtain the quotient p. Next, in step (2), the quotient p is rounded off. In step ■,
A number of buzzer drive signals corresponding to the quotient n are sent to the buzzer driver (48). Next, in step (2), the LED drive signal is applied a number of times corresponding to the quotient p to the LED driver (49
). For example, if the detected temperature is 180℃,
Send the buzzer drive signal three times and the LED drive signal three times. As a result, the buzzer sounds 3 times and the LED lights up 3 times, so the inspector can see that the detected temperature is 3 x 50 + 3 x to
It can be seen that the temperature is -180°C.

Through the above inspection, it can be confirmed whether there is any abnormality in the operation of the thermistor [3]. Furthermore, the thermistor (3
) If you want to check whether the detected temperature is correct, you can do so by heating something whose temperature is known, such as boiling water. In this case, since the detected temperature θ of the thermistor (3) is directly read, there is no need to convert the temperature from the resistance value of the thermistor (3) as in the conventional case, and there is an advantage that the 11 constant is simplified.

In the above embodiment, in each inspection procedure of the thermistor and encoder, the number of times the buzzer or LED rings or lights up is weighted by a predetermined number of units, so that a single display means continuously sounds or lights up. Rather than let
Not only does reading take a shorter time, it also makes counting easier and reduces reading errors.

<Effects of the Invention> As described above, the present invention does not require the use of a separate measuring device, and displays the reading results externally as many times as necessary using a display means, so it is not necessary to visually check the meter, etc. The inspector only has to count the number of times the display is displayed, which has the unique effect of making the inspection easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the heating cooking appliance of the present invention, FIG. 2 is a block diagram of an automatic inspection system, and FIGS. 3 to 5 are flowcharts showing automatic inspection procedures. (1)...Heating cooking appliance, (3)...Thermistor as a temperature sensor, (36)
...Microcomputer constituting reading means, calculation means, and driving means, (43)...Mode changeover switch as setting means, (45)...Encoder as identification means, (46)
)...LED as a display means.

Claims (1)

[Claims] 1. A heating cooking appliance that is provided with a temperature sensor that detects the temperature of the pot, and also has a setting means for setting the cooking temperature and an identification means for identifying the setting position,
A reading means for reading either or both of a numerical value corresponding to the detected temperature of the temperature sensor and a numerical value representing the identified setting position of the identification means, and a calculation for counting the number of units of 1 included in the read numerical value. means, display means,
A heating cooking appliance characterized by comprising a drive means for driving the display means a number of times corresponding to the number of pieces. 2. The display means is composed of two display means, and
The above number of units is two large and small, and the calculation means calculates the number of large units included in the above number, and subtracts the number of large units multiplied by the above number from the above number, and the remaining number is included. The driving means drives one display means based on the number of large units, and drives the other display means based on the number of small units. A heating cooking appliance according to claim 1 above.