JPH0456616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cooking device such as a rice cooker used in general households.

Conventional technology A rice cooker using a conventional microcomputer uses a pulse signal near zero volts of the commercial power supply voltage (period of half the power supply frequency, hereinafter referred to as [zero volt pulse] ZVP) output by a zero volt pulse generating means. It operates in synchronization with
In addition, this ZVP was counted and used as a reference for time measurement, and the timing of load control such as tri-attack was determined. Therefore, this ZVP must always be read into the microcomputer, and the series of processing for the rice cooker control program must be performed within this ZVP cycle (8.3 mS, 50 Hz if the power frequency is 60 Hz).
Then, it was necessary to finish the process in 10 mS).

Problems to be Solved by the Invention As described above, in the conventional method, there is a restriction on the processing time of keeping a series of processing of a control program within a half period of the power supply frequency, and data input processing such as temperature input and key input In order to avoid inputting incorrect values due to noise, etc., and in the case of input data whose state changes, after the state completely changes,
Since the data had to be input into a microcomputer for the first time, it was desirable to take as long a time as possible to execute the data input process. However, due to the above restrictions, it was not possible to make the length too long.

The present invention has been made in view of these problems, and provides a cooking device in which the control program itself remains synchronized with the power supply voltage at zero volts, and the time required for temperature and key input processing is approximately half the cycle of the power supply frequency. The purpose is to provide

Means for Solving the Problems In order to solve the above problems, the present invention maintains the control program itself in synchronization with the power supply voltage at zero volts, and processes sequence processing and temperature/key input processing in one cycle of the power supply frequency. In this method, the positive phase and negative phase are separated.

Effect: With the above means, the execution time of the data input process can be extended to approximately half the cycle of the power supply frequency, so that input of erroneous data values due to noise or the like is further reduced.

Embodiment FIG. 1 shows an example of a rice cooker as a cooking device of the present invention. In FIG. 1, 1 is a sequence processing unit that processes the rice cooking sequence of the rice cooker, 2 is a temperature/key input processing unit that performs data input processing, and 3 is a temperature/key input processing unit that measures time and interacts with the sequence processing unit 1. This is a processing/switching section that switches between the key input processing section 2 and the key input processing section 2. 4 is a microcomputer, and the sequence processing section 1, temperature/key input processing section 2, and processing/switching section 3 are realized by programs. Reference numeral 5 denotes a zero volt pulse generating means, which generates a positive pulse near zero volt of the commercial power supply voltage.
The pulses from this zero-volt pulse generation means 5 are input to the microcomputer 4, and the processing/switching section 3 counts the pulses to measure time and switches between the sequence processing section 1 and the temperature/key input processing section 2. be.

The operation of the above configuration will now be described.
As shown in FIG. 2, zero volt pulse generating means 5
This generates ZVP, which is input to the microcomputer 4, which is counted and time measured by the processing/switching unit 3, and the timing of each load control such as try-out is determined, and then the sequence processing unit 1 and the temperature - The key input processing section 2 is switched, and the execution operation of the microcomputer 4 is switched. Thereafter, the processing/switching unit 3 measures the time and takes load control timing every time ZVP is output by the zero-volt pulse generating means 5.
Necessary processing is performed for each P, and the sequence processing section 1 and the temperature/key input processing section 2 are switched.

Effects of the Invention As described above, according to the present invention, necessary processing for each ZVP, such as time measurement and load control timing, is performed in ZVP synchronization, and sequence processing and temperature/key input processing are processed and switched. Since the positive phase and negative phase are performed separately within one cycle of the power supply frequency, the execution time for temperature and key input processing increases, and As a result, it is possible to avoid inputting erroneous values of input data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of an embodiment of the cooking device of the present invention, and FIG. 2 is a timing chart showing the operation. DESCRIPTION OF SYMBOLS 1... Sequence processing section, 2... Temperature/key input processing section, 3... Processing/switching section, 4... Microcomputer, 5... Zero-volt pulse generation means.

Claims (1)

[Claims] 1 Equipped with a zero-volt pulse generating means that generates a positive pulse near zero volts of the commercial power supply voltage, and a microcomputer to which the pulse generation of the zero-volt pulse generating means is input, and the microcomputer is configured to process a cooking sequence. a temperature/key input processing unit that performs data input processing, a temperature/key input processing unit that measures time by counting pulses of the zero volt pulse generation means, and a temperature/key input processing unit that performs data input processing. A cooking device comprising a switching processing/switching section.