JPH045713A - Heating cooker - Google Patents

Abstract

PURPOSE:To offer this heating cooker easy for use by keeping cooking temperature adequate by comparing the temperature of cooked food and set temperature with each other, and sending an optical temperature signal to show heating or stopping, and sending an optical temperature signal to show heating or stopping, and decoding it. CONSTITUTION:A transmission unit 1 provided with a temperature setting means 3 to set the cooking temperature, a temperature detecting means 2 to detect the temperature of the cook food, and a comparing means 4 to compare temperature information from the means 2 and the set temperature from the means 3 with each other and output a signal. A microporocessor means 5 converts the output of the means 4 into a data code string, and a driving means 7 converts the output of the means 5 into the optical signal 9. A system clock generating means 6 generates a basic clock to operate the means 5. In a reception unit 10, a converting means 11 converts the signal 9 into an electric signal, and the microprocessor means 12 receives the output of the means 11, and generates a heating signal. A heating means 13 is operated by the signal of the means 12, and heats the cooked food. Since this heating cooker transmits the temperature information by using the optical signal, without wiring and it is easy for use.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heating cooker used, for example, in cooking fried foods.

Conventional technology The conventional method of frying food is to detect the temperature of oil using a temperature detection means such as a thermocouple, and feed back this detected temperature to control the heating means to maintain the temperature suitable for cooking. It was something I tried to do.

Problems to be Solved by the Invention In the conventional method described above, feedback of the detected temperature is performed by wire, which is inconvenient to use, for example, because there is a restriction on the size of a pot that can be used for cooking.

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve the problems of the conventional configuration, and provides an easy-to-use heating cooker that uses optical signals to transmit temperature information. The primary purpose is to Further, in relation to the first object, a second object is to provide a heating cooker which is further improved in usability.

Means for Solving the Problems A first means of the present invention for achieving the first object is a temperature setting means for setting the cooking temperature, a temperature detection means for detecting the temperature of the food to be cooked, and a temperature detection means for detecting the temperature of the food to be cooked. Comparing means for comparing temperature information inputted from the means with temperature information set by the temperature setting means and outputting a signal; microprocessor means for converting the signal into a data hood string; and an output of the microprocessor means. a transmitting unit having a driving means for converting the optical signal into an optical signal, a system clock generating means for generating a basic clock for operating the microprocessor means, a converting means for converting the optical signal into an electrical signal,
The heating cooking device is provided with a receiving unit having microprocessor means that receives the output of the converting means and creates a heating signal, and heating means that operates based on the signal of the microprocessor means and heats the food to be cooked.

In addition to the configuration of the first means, the second means of the present invention to achieve the second object is that the receiving unit determines whether the pulse width of the signal received by the microprocessor means is appropriate. The heating cooking device is provided with a determination section for determining the determination result, and a display means for displaying the determination result of the determination section.

The first means of action works as follows. The sending unit is
The temperature information of the food detected by the temperature detection means is compared with the temperature information set by the user, and a light temperature signal indicating heating/stopping is transmitted. a receiving unit decodes the signal;
If heating is necessary, the output means is driven to heat, and if heating is not necessary, the output means is stopped to maintain the cooking temperature at an appropriate level.

Moreover, the second means improves the usability of the heating cooker of the first means, and operates as follows. That is, the determination unit provided in the receiving unit determines whether the pulse width of the signal received by the microprocessor means, which also constitutes the receiving unit, is appropriate, and outputs it to the signal display means. A person can determine whether or not the device is operating normally just by looking at or listening to this display means.

Embodiment FIG. 1 shows the structure of a heating cooker which is an embodiment of the first means of the present invention. The heating cooker of this embodiment includes a transmitting unit 1 that transmits an optical heating signal, and a receiving unit 10 that receives this signal and controls the heating means. The configuration of the transmitting unit 1 will be explained. 2 is pot 1
5 is a temperature detection means consisting of a thermistor or the like that detects the temperature of the oil that is the food to be cooked. Reference numeral 3 denotes a temperature setting means consisting of a volume and the like for the user to set the cooking temperature. 4
is the temperature information detected by the temperature detection means 2 and the temperature setting means 3
This is a comparison means that compares the temperature information set in , compares and determines whether the temperature of the food to be cooked is higher or lower than the set temperature, and outputs this signal. 5 is a data code converter 5a which receives the signal from the comparing means 4 and generates a data code signal corresponding to this signal, and divides the basic clock by the data code signal of the data code converter 5a, and divides the frequency of the basic clock to about 30k)
This microprocessor means includes a branching section 5b that creates a carrier frequency consisting of a frequency of 40 kHz from Iz, and a modulation section 5c that modulates this carrier frequency with a data code signal. Reference numeral 6 denotes a system clock generating means for supplying a basic clock to the frequency dividing section 5b. Further, 7 is a driving means for receiving a signal from the microprocessor means 5 and generating an optical signal modulated by near-infrared light having a wavelength of about 9500 A as a transmission medium, which includes a light emitting diode 7a and a driving circuit 7b for driving the light emitting diode 7a. It is equipped with

Reference numeral 8 denotes a battery such as a dry battery, which is a power source for each of the above-mentioned means.

Next, the configuration of the receiving unit 10 will be explained. 11 is a conversion means for converting the optical signal transmitted by the transmitting unit 1 into an electrical signal, and a PIN diode Ila receives the optical signal 9 transmitted from the light emitting diode 7a and converts it into an electrical signal.
, an amplifier circuit 11b that amplifies the output of the PIN diode lla by about 100 dB, and a 30 kHz signal from this output signal.
A band-pass filter Ilc that discriminates only the carrier wave number component of about 40 kHz from z, a detection circuit lid that removes only the carrier frequency from the output of the band-pass filter LLC, and a waveform shaping of the envelope curve signal of the detection circuit 11d to generate a data code signal. The waveform shaping circuit 11e extracts only the component. 12 is a microprocessor means for receiving the output of the converting means 11 and creating a heating signal. The microprocessor means 12 includes a pulse width measurement section 12a that measures the pulse width of the data code signal outputted by the waveform shaping circuit 11e, a conversion section 12b that decodes the signal converted into a data code string, and an output of the conversion section 12b. Output unit 12 that outputs signals such as heating and stopping according to signals
It has c. 13 is a microprocessor means 12
It is a heating means that operates with an output of
5. Reference numeral 14 denotes a system clock generating means for generating a basic clock for operating the microprocessor means 12.

The operation of this embodiment will be explained below. The data code signal generated by the microprocessor means 5 will be briefly explained in the second drawing. The data code signal used in this embodiment is composed of a collection of predetermined binary numbers of several bits, for example '100' as shown in FIG. 2(A).
It consists of a 6-bit binary number of 111'. In this case, the data code converter 5c outputs a pulse signal train as shown in FIG. 2(B). That is, data 0''0''1', etc. are output in order starting from data '1'. 1' and lot, which constitute this data code signal, are composed of a combination of a mark, which is a period during which the carrier is output, and a space, which is an idle period, as shown in Fig. 2 (C) and (D). has been done. In this embodiment, the mark time is kept constant, and the space time is set to 1' when the space time is shortened, and 0' when the space time is lengthened. Further, in this embodiment, the data code string meaning heating is set as "111000" and the data code string meaning stop is set as '000111'. and the cooking temperature set in the temperature setting means 3, and if the detected temperature of the temperature detecting means 2 has not reached the set temperature, a signal is sent to continue heating, and if it has reached the set temperature, heating is stopped. The data code conversion section 5a constituting the microprocessor means 5 converts the heating or stop signal into a predetermined data code signal based on the output of the comparison means 4, and outputs the signal. Upon receiving this output, the modulating section 5c modulates this signal with a carrier frequency created by dividing the basic clock generated by the system clock generating means 6 by the frequency dividing section 5b, and outputs it to the driving means 7. The light emitting diode 7a constituting the driving means 7 generates an optical signal 9 by modulating this signal with near infrared rays having a wavelength of approximately 9500 A, which is a transmission medium.This optical signal 9 is received by the PIN diode lla of the receiving unit 1O. This electrical signal is amplified by about 100 dB in the amplifier circuit 11b, and the carrier frequency component is discriminated in the bandpass filter LLC.Then, this signal is passed through an integrating circuit composed of a capacitor and a resistor. The waveform shaping circuit 11e converts the signal into an envelope curve signal into a square wave and then into a data code signal. It is almost the same as the data code signal output from 5.

Here, the operation of the detection circuit lid/waveform shaping circuit 11e will be explained using FIG. PIN diode l
When a large input signal is input, the signal passed from the amplifier circuit 11b and passed through the bandpass filter 11c is as shown in FIG. 3 (1) A.
With peak-to-peak as shown in Figure 2, only the carrier frequency is about 4V. This signal is output to the detection circuit 11d and detected, thereby drawing an envelope curve determined by the time constants of the capacitor and resistor and the input signal, as shown in FIG. 3(1)B. If a large input is applied, the output level from the detection circuit lid also becomes high. The next waveform shaping circuit 11e shapes the envelope curve output sent from the detection circuit lid using the threshold value of I■, and outputs a square wave data code signal as shown in No. 31i4(1)C. . Next, a case where a small input signal is input to the PIN diode lla will be explained.

The output signal of the signal that has passed through the amplifier circuit 11b and bandpass filter llc is smaller than that when the input is large, and is about 4 V or less in peak-to-beak. Here, Figure 3 (2)
As shown in A, the explanation will be made assuming that the output level is 3V peak-to-peak. In this case, the output of the detection circuit lid becomes an envelope curve as shown in FIG. 3(2)B. That is, since the input signal is small, the output level from the detection circuit lid is also slightly low. In this way, the waveform shaping circuit li
e outputs a square wave data code signal as shown in FIG. 3(2)C. That is, the eight waveforms of the waveform shaping circuit 11e are wide when the mark pulse width is a large input signal.
It becomes narrower for small input signals.

The data code signal output from this waveform shaping circuit lie is sent to the next microprocessor means 12. Pulse width measurement section 12 constituting microprocessor means 12
a measures the pulse width of the sent data code signal with reference to the basic clock. The conversion unit 12b receives this signal, decodes the signal converted into a data code string, determines whether it is a heating signal or a stop signal, and outputs the output circuit 12C.
Output to. The output circuit 12c drives the heating means 13 according to this signal.

In this way, the cooking temperature of the food in the pot 15 is controlled to the cooking temperature set by the user.

As described above, according to this embodiment, the temperature of the food to be cooked can be transmitted using an optical signal, and there is no restriction on the size of the pot 15 to be used. Furthermore, the temperature information detected by the temperature detection means 2 will not be transmitted erroneously. Furthermore,
Since the transmitting unit and receiving unit are separated, it is very easy to use.

Next, an embodiment of the second means will be described based on FIG. 4. Components that are common to those used in the embodiment of the first means are given the same reference numerals and explanations will be omitted. 12e determines whether the pulse width output from the pulse width measurement unit 12a is wider or narrower than the set value, and if it is narrow, the reception level is low (a signal indicating that the device is in a state where it is difficult to operate) is determined. This is a determination unit that outputs the output.In other words, the first set value is set to a boundary value between when the device is operating normally and when the device is operating poorly.

Reference numeral 16 denotes a display means comprising a light emitting diode or the like that receives the signal from the determination section 12e and displays it to the user.

The operation of this embodiment will be explained below. The transmitting unit 1 may not be able to transmit due to conditions such as the battery 8 being exhausted, the transmitting unit not being set correctly, the transmitting unit battery being exhausted, or the filter section of the transmitting/receiving unit being dirty. When the level drops, the receiving unit IO malfunctions or does not work at all.

In the embodiment of the first means described above, even if such a state exists, the user cannot know this state. In other words, the abnormality was noticed only after the product was used. In this embodiment, the determination unit 12e and the display unit 1
6, and the presence or absence of this abnormality can be checked at all times. It is also possible to add a separate check switch and turn it on when checking is desired, thereby knowing whether there is an abnormality. In this way, if the user notices an abnormal condition, he or she can take appropriate measures such as charging the battery 8.

Note that if a light emitting diode and an audio circuit are used together as display means, an abnormality can be recognized even if the user is not present. Further, this audio circuit or the like can also serve as an alarm device for notifying abnormal temperatures of the food to be cooked. In addition, in this example,
Although the display is made to be displayed when an abnormal state occurs, conversely, the display by a light emitting diode or the like may be made only when the state is normal. Furthermore, although an optical signal is used as the transmission medium in this embodiment, radio waves may also be used as the transmission medium. Furthermore, although the pulse width was measured using marks as a reference, it may also be based on spaces. However, in the case of spaces, it must be noted that the longer the pulse width, the smaller the signal.

Furthermore, in this embodiment, a data code signal modulated with a carrier frequency is used, but it can also be applied to a non-modulated baseband system.

As described above, according to this embodiment, it is possible to provide a heating cooker that is more convenient to use than the above-described embodiment of the first means. The idea of this embodiment can also be used to detect battery exhaustion in wireless remote controllers used in AV type equipment such as televisions and video tape recorders.

Effects of the Invention As described above, according to the first means of the present invention, the temperature setting means for setting the cooking temperature, the temperature detecting means for detecting the temperature of the food to be cooked, and the temperature information input from the temperature detecting means. Comparing means for comparing the temperature information set by the temperature setting means and outputting a signal, microprocessor means for converting the signal into a data code string, and driving means for converting the output of the microprocessor means into an optical signal. a transmitting unit having a system clock generating means for generating a basic clock for operating the microprocessor means, a converting means for converting the optical signal into an electrical signal, and a microprocessor for generating a heating signal in response to the output of the converting means. By making the heating cooker equipped with a processor means and a receiving unit having a heating means that operates based on a signal from the microprocessor means and heats the food to be cooked, temperature information is transmitted using an optical signal, making it easy to use. It is possible to provide a heating cooker with good quality. According to the second means, in addition to the configuration of the first means, the reception unit includes a determination section that determines whether the pulse width of the signal received by the microprocessor means is appropriate, and a determination result of the determination section. By providing a display means for displaying , it is possible to provide a heating cooker that is even more user-friendly than the first means.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the configuration of a heating cooker according to the first embodiment of the present invention, FIG. 2 is a diagram explaining the data code signal, and FIG. 3 is a waveform diagram explaining the operation of each part of the same. , FIG. 4 is a circuit diagram showing the configuration of a heating cooker showing a second embodiment of the present invention. 1... Transmission unit, 2... Temperature detection means, 3...
- Temperature setting means, 4... Comparison means, 5... Microprocessor means, 6... System clock generation means,
7... Driving means, 9... Optical signal, 10... Receiving unit, 11... Conversion means, 12... Microprocessor means, 12e... Judgment unit, 13... Heating means, 16...Display means. Name of agent: Patent attorney Shigetaka Awano and one other person Figure t1Ei! j2...1...! -1 ki is 6 seasons N 3-11 houses 18 valleys 4-1.1 companies 46 Yuzu (c) Data fu -'(jri' Fig.

Claims (2)

[Claims] (1) A temperature setting means for setting the cooking temperature, a temperature detection means for detecting the temperature of the food to be cooked, and comparing the temperature information input from the temperature detection means and the temperature information set by the temperature setting means, Comparing means for outputting a signal; microprocessor means for converting the signal into a data code string; driving means for converting the output of the microprocessor means into an optical signal; and a system clock for generating a basic clock for operating the microprocessor means. a transmitting unit having a generating means, a converting means for converting the optical signal into an electrical signal, a microprocessor means for creating a heating signal in response to an output of the converting means, and a transmitting unit that operates based on the signal of the microprocessor means to control the cooking. A heating cooker comprising: a heating means for heating; and a receiving unit having a heating unit. (2) The heating cooking according to claim 1, wherein the receiving unit comprises a determining section for determining whether the pulse width of the signal received by the microprocessor means is appropriate, and a display means for displaying the determination result of the determining section. vessel.