CN111487856A - Zero-Crossing Timer in Appliances - Google Patents

Abstract

The invention discloses a zero-crossing timer in an electrical appliance, which includes a single-chip microcomputer connected to a 50Hz mains alternating current, and the single-chip microcomputer is connected to other components in the electrical appliance. The time interval between two zero-crossing pulse signals is 0.01S. The single-chip microcomputer is equipped with a detection counter that can detect and calculate the zero-crossing pulse signal, analyze and process the data of the detection counter and control the work of other components of the electrical appliance. Chip, when the 50Hz mains AC power passes through the detection counter, the detection counter detects the zero-crossing pulse signal and calculates the specific zero-crossing pulse signal data and transmits the data to the control chip. The control chip analyzes and processes the data and integrates the other The components work to realize the timing function.

Description

Zero-Crossing Timer in Appliances

technical field

The present invention relates to the technical field of electrical components, in particular to a zero-crossing timer in electrical appliances.

Background technique

The application of electrical appliances is very wide, and all electrical appliances are equipped with timers with timing functions. The operations such as appointment switching and adjustment of electrical appliances need to be assisted by timers, while the timing functions of existing timers generally use hardware crystal oscillators. To achieve this, the wafer is cut from a quartz crystal at a certain azimuth angle, and the wafer and IC form an oscillation circuit to form a crystal oscillator. Such a structure is relatively complex, there are many production and processing procedures, and the price of crystal oscillators is relatively high, which is not conducive to reducing the hardware cost of products, and the market competitiveness is general. Moreover, the stability of crystal oscillators is general, and it is easily affected by temperature, power supply voltage, etc. Affect the error, the accuracy is average, affect the timing function of the electrical appliance and the use effect of other functions, and the user experience is average.

Therefore, how to achieve a timer in electrical appliances with strong stability, high timing accuracy, effectively simplifying the product structure, reducing the hardware cost of the product, saving raw materials, simplifying production and processing procedures, reducing production costs, and improving market competitiveness is Technical problems that need to be solved urgently in the industry.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a zero-crossing timer in an electrical appliance, aiming to realize a timekeeping by using the frequency of the city alternating current, without additionally setting a crystal oscillator, with strong stability and high timing accuracy, effectively simplifying the product structure, It can reduce the hardware cost of products, save raw materials, simplify production and processing procedures, reduce production costs, and improve the zero-crossing timer in electrical appliances that are competitive in the market.

The invention proposes a zero-crossing timer in an electrical appliance, which includes a single-chip microcomputer connected to a 50Hz commercial alternating current, and the single-chip microcomputer is connected to other components in the electrical appliance. The 50-Hz commercial alternating current generates 50 cycles per second, that is, 100 zero-crossing pulse signals are generated per second. The time interval between two zero-crossing pulse signals is 0.01S. The single-chip microcomputer is equipped with a detection counter that can detect and calculate the zero-crossing pulse signal, analyze and process the data of the detection counter and control the work of other components of the electrical appliance. Chip, when the 50Hz city AC power passes through the detection counter, the detection counter detects the zero-crossing pulse signal and calculates the specific zero-crossing pulse signal data and transmits the data to the control chip. The control chip analyzes and processes the data and integrates the other The components work to realize the timing function.

Preferably, a number of pins connected to other components of the electrical appliance are drawn out from the side surface of the single-chip microcomputer.

The present invention realizes a timekeeping by using the frequency of the city alternating current without additionally setting a crystal oscillator, has strong stability, high timing accuracy, effectively simplifies the product structure, reduces the hardware cost of the product, saves raw materials, and simplifies the production and processing procedures , the zero-crossing timer in electrical appliances that reduce production costs and improve market competitiveness.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of a zero-crossing timer in an electrical appliance of the present invention.

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Referring to FIG. 1, an embodiment of the zero-crossing timer in the electrical appliance of the present invention is proposed, including a single-chip microcomputer 101 connected to a 50Hz city alternating current, the single-chip computer 101 is connected to other components 102 in the electrical appliance, and the 50Hz city alternating current generates 50 cycles per second , that is, the zero-crossing pulse signal is generated 100 times per second, that is, the zero-crossing pulse signal with a period of 0.01S is generated, and the time interval between two zero-crossing pulse signals is 0.01S. The detection counter 103 of the pulse signal, the control chip 104 that can analyze and process the data of the detection counter 103 and integrate the work of other components 102 of the electrical appliance, the side of the single chip 101 leads out a number of pins 105 that are connected to other components 102 of the electrical appliance.

When the 50Hz city alternating current passes through the detection counter 103, the detection counter 103 detects the zero-crossing pulse signal and calculates the specific zero-crossing pulse signal data and transmits the data to the control chip 104, and the control chip 104 analyzes and processes the data and integrates the power distribution device. The other components 102 of the device work to realize the timing function, and the timing accuracy is high, so that the work of other components 102 of the distributor can be unified based on the timing function of the zero-crossing timer. The frequency is used for timing, so that no additional crystal oscillator is needed, the structure is simplified, the hardware cost of the product can be reduced, the raw material can be saved, the production and processing procedures can be simplified, the production cost can be reduced, and the market competitiveness can be improved. Stable, not easily affected by various factors such as temperature and voltage, strong stability, high timing accuracy, can ensure the use of the timing function and other functions of the electrical appliance, and the user experience is good.

The present invention realizes a timekeeping by using the frequency of the city alternating current without additionally setting a crystal oscillator, has strong stability, high timing accuracy, effectively simplifies the product structure, reduces the hardware cost of the product, saves raw materials, and simplifies the production and processing procedures , the zero-crossing timer in electrical appliances that reduce production costs and improve market competitiveness.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structural transformation made by using the contents of the description and the accompanying drawings of the present invention, or directly or indirectly applied to other related technical fields, will not limit the scope of the invention. Similarly, it is included in the scope of patent protection of the present invention.

Claims (2)

1. The zero-crossing timer in the electrical appliance is characterized in that, comprising a single-chip microcomputer connected to the city alternating current of 50Hz, the single-chip microcomputer is connected to other components in the electrical appliance, and the city alternating current of 50Hz generates 50 cycles per second, that is, 100 zero-crossings per second are generated. Pulse signal, the time interval between two zero-crossing pulse signals is 0.01S, the single-chip microcomputer is provided with a detection counter that can detect and calculate the zero-crossing pulse signal, and can analyze and process the data of the detection counter and integrate other components of the electrical appliance The working control chip, when the 50Hz city alternating current passes through the detection counter, the detection counter detects the zero-crossing pulse signal and calculates the specific zero-crossing pulse signal data and transmits the data to the control chip. The control chip analyzes and processes the data and integrates it. The other parts of the appliance work to achieve the timing function. 2 . The zero-crossing timer in the electrical appliance according to claim 1 , wherein a number of pins connected to other components of the electrical appliance are drawn out from the side of the single-chip microcomputer. 3 .

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