KR0178123B1 - Cooking apparatus - Google Patents

Abstract

Providing electric and cooking equipment that can accurately detect battery voltage regardless of the amount of current consumed.

In the gas table in which electric loads such as an LED circuit or a buzzer circuit are connected to the battery 4 through the transistor 6 which is energized when the micro switch 231 is turned on, the microcomputer 5 monitors the battery voltage. The voltage dividing circuit 7 which sends the voltage dividing voltage Vb to the voltage monitoring unit 52 is connected to the battery 4 via the transistor 8 which is energized when the micro switch 231 is turned on.

Description

Cooker

1 is a front view of a gas table according to the first and second embodiments of the present invention.

2 is an explanatory diagram of a gas table according to the first and second embodiments of the present invention.

3 is an explanatory diagram of an ignition / fire extinguishing switch of a gas table according to the first and second embodiments of the present invention.

4 is a block diagram of a gas table according to the first embodiment of the present invention.

5 is a main block diagram of a gas table according to the first embodiment of the present invention.

6 is a block diagram of a gas table according to a second embodiment of the present invention.

7 is a main block diagram of a gas table according to a second embodiment of the present invention.

8 is a block diagram of a first embodiment of a state employed in another electrical apparatus of the present invention.

9 is a block diagram of a second embodiment in which the present invention is employed in another electric apparatus.

10 is a block diagram of an electric apparatus employing the configuration of the prior art.

* Explanation of symbols for main parts of the drawings

4 battery (battery) 5 microcomputer

6: transistor (semiconductor switch element, first semiconductor switch circuit)

7: voltage divider circuit

8: transistor (other semiconductor switch element, second semiconductor switch circuit)

11: H burner (heating means) 21, 23: ignition / fire extinguishing button (heating button)

26,27: grill burner (heating means) 31: 7 segment LED (first indicator)

32: LED (second indicator) 33: buzzer

41: digital transistor (second semiconductor switch circuit)

50: control unit (control means)

61: digital transistor (first semiconductor switch circuit)

211,231: Micro switch (heating switch)

611,41a: input stage f: fish (heated material)

n: cooking vessel Vd: divided voltage

c: electrical equipment

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a cooking appliance in which power for operation is supplied through a semiconductor switch element when the switch is turned on.

[Prior art]

Conventionally, as shown in FIG. 10, when the microswitch 101 is turned on, the battery load is applied to the base 102 so that the electrical load is passed through the transistor 105 through which the collector 103-emitter 104 is energized. An electric device C using a battery 107 (for example, electromotive force 3V) that is supplied with battery power to start operation is known. In addition, the battery voltage monitoring circuit 108 is connected in parallel to the electric load 106 (buzzer, light emitting display, etc.) in order to monitor the battery voltage (for example, notifying 2.3V or less).

The reason why the transistor 105 is used is that the microswitch 101 has a small power specification (DC-30V, about 0.1 A).

[Control to be solved by the invention]

The inventors found that the electric device C is relatively to the electric load 106, such as when the electromotive force of the battery 107 is lowered (used for almost one year), the buzzer sounds, or the 7-segment LED displays 8. It has been found that the battery voltage monitoring circuit 108 tends to notify the end of battery life when a large current consumption flows.

This is because when a relatively large current consumption flows through the electrical load 106, a voltage drop of several hundred mV occurs between the collector 103 and the emitter 104 of the transistor 105. In this case, even if the electromotive force of the battery 107 is, for example, 2.5V, the voltage detected by the battery voltage monitoring circuit 108 is 2.3V, and notifies that the battery life is over.

An object of the present invention is to provide a cooking apparatus capable of accurately monitoring a battery voltage regardless of the magnitude of the current consumption.

[Means for solving the problem]

In order to solve the said subject, this invention employ | adopted the following structures.

(1) heating means for heating a cooked product or cooking vessel, a heating switch for instructing heating start / stop of the heating means, control means for controlling the heating means, etc., a battery having operating power, In the cooking apparatus comprising a semiconductor switch element for supplying battery power to the control means when the heating switch instructs the start of heating the battery voltage is applied to the input terminal, the voltage monitoring circuit for monitoring the battery voltage; When the operation switch was turned on, the electric voltage was connected to the battery through another semiconductor switch element which was energized by being caught at the input terminal.

(2) Heating means for heating a cooked product or cooking vessel, a micro switch for instructing the heating start / stop of the heating means by turning on / off by an elastic pressing operation of the heating button, the remaining heating time, etc. A first indicator, a buzzer for notifying the end of heating, etc., a battery having operating power, a second indicator for indicating a consumption state of the battery, the first and second indicators, the buzzer, and the In addition to controlling heating means and the like, a microcomputer having a voltage monitoring unit, and when the microswitch is turned on, a battery voltage is applied to the input terminal to energize the first and second indicators, the buzzer, and the microcomputer. A cooking apparatus provided with a first semiconductor switch circuit for supplying, comprising: a voltage dividing circuit for sending a voltage dividing voltage to the voltage monitoring unit; Through the second semiconductor switch circuit which is energized by the pressure engagement to an input terminal it was connected to the battery.

In addition, the voltage monitoring circuit for monitoring the battery voltage for applying the present invention to an electrical device that is supplied with battery power to the electrical load through the semiconductor switch element is energized when the operation switch is turned on the input terminal, The battery was connected to the battery via the operation switch (see FIG. 8).

In addition, the voltage monitoring circuit for monitoring the battery voltage to apply the present invention to an electrical device that is supplied with battery power to the electrical load through the semiconductor switch element is energized when the operation switch is turned on when the operation switch is turned on When the operation switch is turned on, the battery voltage is connected to the battery through another semiconductor switch element which is energized by being caught by an input terminal (see FIG. 9).

[Effects and Effects of the Invention]

[About the first independent claim]

When a user sets a cooked product or a cooking vessel and operates a heating switch to instruct heating start of the heating means, the battery voltage is applied to the input terminal of the semiconductor switch element so that the semiconductor switch element is energized and the battery power is supplied to the control means. The control means instructs the heating means to start heating so that the heating means heats the cooked object or the cooking vessel. When the battery voltage is applied to the input terminal of the semiconductor switch elements having different battery voltages, the other semiconductor switch elements are energized, and a voltage monitoring circuit for monitoring the battery voltages is connected to the battery.

Since the voltage monitoring circuit is connected to the battery via another semiconductor switch element, it is not affected by the voltage drop of the semiconductor switch element. For this reason, the voltage monitoring circuit can accurately monitor the battery voltage regardless of the magnitude of the current consumed by the control means.

[About the second independent claim]

When the user sets the workpiece or the cooking vessel and pushes the heating button elastically, the micro switch is turned on, and the battery voltage is applied to the input terminal of the first semiconductor switch circuit so that the first semiconductor switch circuit is energized and the operating power is reduced. Supplied to the first and second indicators, buzzers, and microcomputers.

Thereby, the microcomputer instructs the heating means to start heating, instructs the first indicator to emit light of the remaining heating time and the like, and instructs the buzzer to notify the end of the heating by ringing.

When the microswitch is turned on, the battery voltage is applied to the input terminal of the second semiconductor switch element, so that the second semiconductor switch circuit is energized, and the voltage divider circuit is connected to the battery, and the voltage divider circuit sends the divided voltage to the voltage monitor of the microcomputer. The voltage monitoring unit detects the depleted state of the battery based on the divided voltage, and the second indicator displays the depleted state of the battery at all times or at all times.

Since the voltage dividing circuit is connected to the battery through the second semiconductor switch circuit, the voltage dividing voltage sent to the voltage monitoring unit is not affected by the voltage drop of the first semiconductor switch circuit. For this reason, the voltage monitoring unit can faithfully monitor the battery voltage regardless of the amount of current consumed by the buzzer and the display of the consumption state by the second display can be accurately performed.

[Regarding the first embodiment when the present invention is applied to an electric machine; See Figure 8.

When the user turns on the operation switch, the battery voltage is applied to the input terminal of the semiconductor switch element so that the semiconductor switch element is energized and the electronic power is supplied to the electric load. When the operation switch is turned on, the voltage monitoring circuit for monitoring the battery voltage is electrically connected to the battery.

Although the semiconductor device causes a voltage drop due to the consumption current flowing through the electric load, the voltage monitoring circuit is connected to the battery through the operation switch, so that the voltage monitoring circuit can accurately monitor the battery voltage without being affected by the voltage drop. .

[Regarding the first embodiment when the present invention is applied to an electric machine; See Figure 9.

When the user switches the operation ON, the battery voltage is applied to the input terminal of the semiconductor switch element, so that the semiconductor switch element is energized and the battery power is supplied to the electric load. In addition, since the battery voltage is also applied to the input terminal of the other semiconductor switch element by turning on the operation switch, the other semiconductor switch element is also energized, and the voltage monitoring circuit for monitoring the battery voltage is electrically connected.

Although the semiconductor device causes voltage drop due to the consumption current flowing through the electric load, the voltage monitoring circuit is connected to the battery through another semiconductor switch device, so that the voltage monitoring circuit accurately monitors the battery voltage without being affected by the voltage drop. can do.

[Embodiment of the Invention]

EMBODIMENT OF THE INVENTION Hereinafter, one Example of this invention is described in detail based on FIG. 1 thru | or FIG.

As shown in the figure, the gas table A is operated by elastically pressing the gas furnaces 1 and 2, the grill 3, the ignition / extinguishing buttons 21, 22 and 23, and the ignition / extinguishing button 21. By micro-switches 211 and 212 which are turned on and off by means of an elastic press, by micro-switches 221 which are turned on and off by an elastic press operation of the ignition / extinguish button 22, Micro switches 231 and 232 that are turned on and off, 7 segment LEDs 31 for displaying grill timer times, LEDs 32 for notifying that the battery life is exhausted, piezoelectric buzzers 33 ringing at the end of cooking, and A control unit 50 having a battery 4, a microcomputer 5 for controlling the LEDs 31, 32, the piezoelectric buzzer 33, and the like, a 7-segment LED 31, an LED 32, A transistor 6 for supplying power to the piezoelectric buzzer 33 or the like, and a transistor 8 for electric connection between the voltage dividing circuit 7 for dividing the battery voltage and the battery 4 are obtained. And.

The gas stove 1 is equipped with an H burner (4100 kcal; 11), and the gas is supplied to the H burner (11) through a gas supply pipe (10) provided with a gas amount regulating valve (not shown) and a safety valve (12). The ignition electrode 13 is ignited and combusted by the spark discharge. In addition, the gas furnace 1 includes a thermistor 14 for pressing down the bottom of the cooking vessel n.

The gas amount regulating valve increases or decreases the gas amount supplied to the H burner 11 by changing the valve opening degree in accordance with the position of the lever 15 formed in the front upper part.

The safety valve 12 starts to open the valve when the ignition / extinguishing button 21 is elastically pushed to the ③ position in FIG. 3. When the electromotive force of the thermocouple 16 is equal to or greater than the ignition detection level (2.8 mV), the safety valve 12 releases the elastic pressing of the ignition / extinguishing button 21 to return to the position ⑤ in FIG. The valve opening is maintained.

The gas stove 2 includes an M burner (2300 kcal; 18), and the gas is supplied to the M burner (18) through a gas supply pipe (17) provided with a gas amount regulating valve (not shown) and a safety valve (19). Then, the ignition electrode 20 is ignited and burned by the spark discharge.

The gas amount regulating valve increases or decreases the gas amount supplied to the M burner 18 by opening the valve in accordance with the position of the lever 24 formed on the front upper part.

The safety valve 19 starts to open the valve when the ignition / extinguishing button 22 is elastically pushed to the ③ position in FIG. When the electromotive force of the thermocouple 25 is equal to or higher than the valve opening holding level, the safety valve 19 maintains the valve opening even when the ignition / extinguishing button 22 is released to return to the position ⑤ in FIG. do.

The grill 3 includes grill burners 26 and 27 (each 1950 kcal) for grilling fish f on both sides, and the grill burners 26 and 27 have a gas flow control valve (not shown) and a safety valve 28. Gas is supplied through the gas supply pipe 25 provided with the gas, and is ignited and combusted by the spark discharge of the ignition electrode 29.

The gas amount regulating valve increases or decreases the gas amount supplied to the grill burners 26 and 27 by opening the valve in accordance with the positions of the levers 36 and 37 formed in the upper part of the front.

The safety valve 28 starts to open the valve when the ignition / extinguishing button 23 is elastically pushed to the ③ position in FIG. 3. When the electromotive force of the thermocouple 38 is equal to or greater than the ignition detection level (2.5 mV), the safety valve 28 releases the elastic pressing of the ignition / extinguishing button 23 and returns the valve to the position ⑤ in FIG. Openness is maintained.

The seven-segment LED 31 whose light emission is controlled by the microcomputer 5 of the control unit 50 and the LED driving circuit 501 is a light emitting diode (two consecutive) having a maximum current consumption of about 70 mA, and a grill burner. During the combustion of (26, 27), the remaining time of the grill timer is displayed by light emission in minutes or seconds.

In addition, the seven-segment LED 31 displays an error code corresponding to the failure cause or error cause at the time of failure or malfunction.

The piezoelectric buzzer 33 whose ringing is controlled by the microcomputer 5 and the buzzer driving circuit 502 of the control unit 50 has a current consumption of about 40 mA when the ringing and extinguishing of the ignition / extinguishing button ( 100mS ringing), 30 seconds before the end of the grill timer (90mS ringing-40mS stop three times), at the end of the grill timer (1.5S ringing every 60S), when the circuit breaks down (continuous ringing until the ignition / fire button is released) When an error occurs (0.5S rings-0.5S stops 5 times).

As shown in Table 1, lighting of the LED 32 is controlled by the microcomputer 5 and the LED drive circuit 501 of the control unit 50.

『Table 1』

Sequence of operation of the LED (32)

1 to 4 shown below are supplements to the above "Table 1".

{1} voltage level

Blink Level ---- 2.2V

Lighting level ---- 2.0V

Return level ---- 2.8V

To return is to turn off the LED 32 in the blinking state when the battery voltage is restored.

{2} Voltage drop error

When the data to be determined every 100mS is equal to or less than the lighting level (detection voltage lighting level) twice in a row, the LED 32 lights up. In addition, the gas table A abnormally stops due to a voltage drop error.

Flashing of {3} LED (32)

When the data to be determined every 100mS is twice or less (a detected voltage blink level, and a detected voltage? Light level) continuously, the LED 32 blinks (a pattern of 1.4 sec on-0.4 sec off).

Off of the {4} LED (32)

After the LED 32 is in a flashing state, the LED 32 is turned off if the data extended every 100 m is equal to or greater than the return level (detection voltage? Return level) for 500 mS.

As shown in FIG. 4, the control unit 50 includes a microcomputer 5, an LED driver circuit 501, a buzzer driver circuit 502, a voltage divider circuit 7, digital transistors 61, 41, and a transistor. (6,8) and the like, and based on the signals from the microswitches 211 and 231, thermistor 14, the grill timer time increase and decrease switches 34 and 35, and the thermocouples 16 and 38, the safety valve 12 28, the buzzer 33, the LED 32, and the seven segment LED 31 are controlled.

The ignition / extinguishing buttons 21, 22, and 23 are in the ① position in FIG. 3 in the extinguishing state, and when the elastically pushes inward from the ② position, the igniter operation microswitches 212, 221, 232 are turned ON, and the igniter 51 And a high voltage is applied to the ignition electrodes 13, 20, 29. Further, when the ignition / fire extinguishing buttons 21, 22, 23 are elastically pushed inward from the position ② in Fig. 3, the micro switches 211, 231 for supplying battery power to the control unit 50 are turned on.

In addition, if the ignition / fire extinguishing buttons 21, 22, and 23 are pressed inward (4 position in Fig. 3) and then released, the motor stops at the 5 position. In case of extinguishing, press again to the inside and then release to return to extinguishing position (① position). This operation is performed by the conventionally known heart cam mechanism.

As shown in FIG. 5, the microswitch 231 has one end connected to the positive electrode 4a of the battery 4, and the other end thereof input terminal 611 of the digital transistors 61 and 41. And 41a).

As shown in FIG. 5, the transistor 6 is connected to the output terminal 612 of the digital transistor 61, and the emitter 63 is connected to the positive electrode (+) of the dry battery 4. 4a), the collector 64 is connected to each of the power supply terminals such as the microcomputer 5, the LED driving circuit 501 and the buzzer driving circuit 502, and the microswitch 231 or 211. Is turned ON, the emitter 63-collector 64 is energized. In addition, since the transistor 6 is a PNP type, the digital transistor 61 is used.

Further, the first semiconductor switch circuit is constituted by the digital transistor 61 and the transistor 6.

As shown in FIG. 5, the transistor 8 is connected to the output terminal 41b of the digital transistor 41, and the emitter 43 is connected to the positive electrode (+) of the dry battery 4. It is connected to 4a), the collector 44 is connected to the voltage divider circuit 7, and when the microswitch 231 or 211 is turned ON, the emitter 43 and the collector 44 are energized. In addition, since the transistor 8 is a PNP type, the digital transistor 41 is used.

In addition, the second semiconductor switch circuit is constituted by the digital transistor 41 and the transistor 8.

The voltage divider circuit 7 is configured by connecting a 10 kΩ resistor 71 and a 47 kΩ resistor 72 in series, and connecting a resistor 72 of 1000 pF to the resistor 72, as shown in FIG. When the transistor 8 is turned on, the divided voltage Vb is sent to the voltage monitoring unit 52 of the microcomputer 5.

The voltage monitoring unit 52 detects the battery voltage based on the divided voltage Vb, and the microcomputer 5 operates as shown in "Table 1".

The dry cell 4 is a series of two single manganese cells connected in series and has electric power for operating the 7-segment LED 31, the buzzer 33, and the control unit 50.

Next, the operation of the gas table A will be described briefly.

When the user sets the fish f or cooking vessel n and elastically operates the ignition / extinguishing button 23 or 21, the microswitches 231 or 211 are turned on and the digital transistors 61 or 60 are turned on. The transistor 6 is energized.

As a result, the operating power is supplied to the microcomputer 5, the LED driving circuit 501, the buzzer driving circuit 502, and the like, and the grill burners 26 and 27 or the H burner 11 are supplied with the ignition electrode 29. Or 13) to ignite and start combustion.

In addition, when the micro switch 231 or 211 is turned on by the elastic pressing operation of the ignition / extinguishing button 23 or 21, the digital transistor 41 is turned on and the transistor 8 is energized.

As a result, the voltage dividing circuit 7 is electrically connected to the battery 4, and the voltage dividing voltage Vb is sent to the voltage monitoring unit 52, and the voltage monitoring unit 52 is based on the voltage dividing voltage Vb. The microcomputer 5 controls the LEDs 32 as shown in Table 1 in accordance with the detected voltage.

During combustion of the H burner 1 and the grill burners 26 and 27, the microcomputer 5 detects the container bottom temperature of the cooking container n based on the output of the thermistor 14 and the remaining time of the grill timer. Indicates an indication to the seven-segment LED 31 and instructs stop / ring of the buzzer 33. In addition, the consumption current changes (several mA to several mA) by the number displayed on the 7-segment LED 31 and the ringing state of the buzzer 33, and the emitter 63-collector of the transistor 6 is changed. A voltage drop of several tens of mA to several hundred mA occurs between 64.

Next, the advantages of the gas table A of the present embodiment will be described.

(A) Since the voltage dividing circuit 7 is configured to be connected to the battery 4 through the transistor 8, the voltage dividing voltage Vb sent to the voltage monitoring unit 52 is affected by the voltage drop of the transistor 6. Do not receive.

For this reason, regardless of the magnitude of the current consumption of the 7-segment LED 31 or the buzzer, the voltage monitoring unit 52 can faithfully monitor the battery voltage and notify that the battery life by the LED 32 has reached its end. Can be corrected.

(B) The battery life is at the end of the battery life {in the case of the 8-segment LED 31, when the buzzer 33 rings} at the end of the battery life. And the lighting state} is not misinterpreted, so that the user is not embarrassed (the flashing notification is not frequent), and as a result, the battery life can be extended.

(C) The number of parts (digital transistors 40, 41, 8) increased only slightly compared with the conventional one, and the manufacturing cost does not increase significantly.

(D) Since the voltage dividing circuit 7 is configured to be electrically connected to the battery 4 via the transistor 8, the voltage dividing voltage Vb does not change even if the contact resistances of the micro switches 211 and 231 change. In addition, the current consumption does not flow through the voltage dividing circuit 7 when not in use.

Next, a second embodiment of the present invention will be described with reference to FIGS. 1 to 3, 6, and 7.

The gas table B of this embodiment differs from the gas table A in the following structures.

6 and 7, since the transistor 6 is of the NPN type, the base 62 is connected to the other end of the micro switches 231 and 211 through the resistors 65 and 66 and the collector 64. Is connected to the positive terminal 4a of the battery 4, and the emitter 63 is connected to each power receiving terminal such as the microcomputer 5, the LED driving circuit 501 and the buzzer driving circuit 502. ), And when the microswitches 231 or 221 are turned on, the collector 64 and the emitter 63 are energized.

6 and 7, the transistor 8 is of the NPN type, the base 42 is connected to the other end of the micro switches 231 and 211 through the resistor 45, and the collector 44 is When the micro switch 231 or 221 is turned on when the micro switch 231 or 221 is turned on, the emitter 43 is connected to the positive terminal 4a of the dry battery 4, and the emitter 43 is connected to the voltage divider circuit 7. The house is energized.

The gas table B of this embodiment has the following advantages in addition to the advantages as described above (a), (b) and (c).

(D) Compared with the conventional ones, the number of parts is slightly increased (resistance 45, 46, transistor 8), and the manufacturing cost does not increase significantly.

The present invention includes the following embodiments in addition to the above embodiments.

a. In the case of the electric apparatus of FIG. 8, if the impedance of the voltage monitoring circuit is sufficiently high (the current consumption of the voltage monitoring circuit is very small), even if the contact resistance of the operation switch is changed or increased due to aging change or the like. Accurately monitor battery voltage.

b. The voltage monitoring circuit may be constituted by something other than a microcomputer, such as a comparator (corresponding to the first independent term).

c. In addition to the gas table, the electric equipment may be a battery-type instantaneous water heater, a radio, a tape recorder, a VTR, a clock, a word processor, a laptop computer, a mobile phone, or the like.

d. The battery may be a secondary battery such as a nickel cadmium battery or a lead storage battery in addition to the battery.

Claims (2)

Heating means (11, 18, 26, 27) for heating the cooking object or cooking vessel, heating switches (211,231) for instructing heating start / stop of the heating means, and control means for controlling the heating means ( 50), a battery (4) having operating power, and a semiconductor switch element (6) which is energized by applying a battery voltage to an input terminal when the heating switch instructs to start heating, and supplies battery power to the control means. In one cooking apparatus, a voltage monitoring circuit for monitoring battery voltage is connected to the battery 4 through another semiconductor switch element 8 which is energized when the operation switch is turned on and the battery voltage is applied to an input terminal. Cooking apparatus, characterized in that. Heating means (11, 18, 26, 27) for heating a cooking object or cooking vessel, and micro switches (211,231) for instructing heating start / stop by heating on / off by elastic pressing of the heating button. And a first indicator 31 which emits light for the remaining heating time, a buzzer 33 for notifying the completion of the heating by ringing, a battery 4 having operating power, and a consumption state of the battery. A microcomputer 5 having a second monitor 32 to display, the first and second indicators, the buzzer, the heating means and the like, a voltage monitoring unit 52, and the microswitch are turned on. And a first semiconductor switch circuit (6) for energizing the first and second indicators, the buzzer, and the microcomputer by supplying a battery voltage to the input terminal. The voltage dividing circuit 7 sent to the voltage monitoring unit 52, When the group microswitch 231 is ON cooking apparatus, characterized in that connected to the battery 4 through the second semiconductor switch circuit 8 to which the battery voltage is energized by engaging the input end.