CN111487856A

CN111487856A - Zero-crossing timer in electric appliance

Info

Publication number: CN111487856A
Application number: CN201910083391.0A
Authority: CN
Inventors: 周国华; 罗立平; 李孔波
Original assignee: Zhongshan Junchuang Electronic Technology Co ltd
Current assignee: Zhongshan Junchuang Electronic Technology Co ltd
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2020-08-04

Abstract

The invention discloses a zero-crossing timer in an electric appliance, which comprises a singlechip connected with 50Hz commercial alternating current, wherein the singlechip is connected with other parts in the electric appliance, the 50Hz commercial alternating current generates 50 cycles per second, namely 100 zero-crossing pulse signals per second, the time interval between the two zero-crossing pulse signals is 0.01S, the singlechip is internally provided with a detection counter capable of detecting and calculating the zero-crossing pulse signals, and a control chip capable of analyzing and processing the data of the detection counter and integrally distributing the work of other parts of the electric appliance, when the 50Hz commercial alternating current passes through the detection counter, the detection counter detects the zero-crossing pulse signals and calculates the specific zero-crossing pulse signal data and transmits the data to the control chip, and the control chip analyzes and processes the data and integrates the work of other parts of the electric appliance so as to realize the timing function.

Description

Zero-crossing timer in electric appliance

Technical Field

The invention relates to the technical field of electric appliance components, in particular to a zero-crossing timer in an electric appliance.

Background

The electric appliances are widely applied, the electric appliances are all provided with timers with timing functions, operations such as appointment switching, adjustment and the like of the electric appliances are all assisted by the timers, the timing function of the existing timers is generally realized by a hardware crystal oscillator, a wafer is cut off from a quartz crystal according to a certain azimuth angle, and the wafer and an IC form an oscillation circuit so as to form the crystal oscillator. Such structure is more complicated, and production and processing processes are various, and crystal oscillator's price ratio is higher, is unfavorable for reducing the hardware cost of product, and market competition is general, and crystal oscillator's stability is general, and it receives influences such as temperature, mains voltage easily and the error appears, and the precision is general, influences the result of use of timing function and other functions of electrical apparatus, and user experience feels general.

Therefore, how to realize a timer in an electrical appliance with strong stability, high timing precision, effectively simplified product structure, reduced product hardware cost, raw material saving, simplified production and processing procedures, reduced production cost and improved market competitiveness is a technical problem to be solved urgently in the industry.

Disclosure of Invention

The invention mainly aims to provide a zero-crossing timer in an electric appliance, aiming at realizing the zero-crossing timer in the electric appliance which can time by the frequency of commercial alternating current without additionally arranging a crystal oscillator, has strong stability and high timing precision, effectively simplifies the product structure, can reduce the hardware cost of the product, saves raw materials, simplifies the production and processing procedures, reduces the production cost and improves the market competitiveness.

The invention provides a zero-crossing timer in an electric appliance, which comprises a single chip microcomputer connected with 50Hz commercial alternating current, wherein the single chip microcomputer is connected with other components in the electric appliance, the 50Hz commercial alternating current generates 50 cycles per second, namely 100 zero-crossing pulse signals per second, the time interval between the two zero-crossing pulse signals is 0.01S, a detection counter capable of detecting and calculating the zero-crossing pulse signals and a control chip capable of analyzing and processing the data of the detection counter and integrally distributing the work of other components of the electric appliance are arranged in the single chip microcomputer, when the 50Hz commercial alternating current passes through the detection counter, the detection counter detects the zero-crossing pulse signals and calculates the specific zero-crossing pulse signal data and transmits the data to the control chip, and the control chip analyzes and processes the data and integrates the work of other components of the electric appliance, thereby realizing the timing function.

Preferably, a plurality of pins connected with other parts of the electric appliance are led out from the side surface of the single chip microcomputer.

The zero-crossing timer in the electric appliance realizes timing through the frequency of commercial alternating current, does not need to additionally arrange a crystal oscillator, has strong stability and high timing precision, effectively simplifies the product structure, can reduce the hardware cost of the product, saves raw materials, simplifies the production and processing procedures, reduces the production cost and improves the market competitiveness.

Drawings

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

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, an embodiment of the zero-crossing timer in an electrical appliance according to the present invention includes a single chip 101 connected to a commercial ac power of 50Hz, the single chip 101 is connected to other components 102 in the electrical appliance, the commercial ac power of 50Hz generates 50 cycles per second, that is, generates 100 times of zero-crossing pulse signals per second, that is, generates a zero-crossing pulse signal with a period of 0.01S, a time interval between two zero-crossing pulse signals is 0.01S, the single chip 101 is provided with a detection counter 103 capable of detecting and calculating the zero-crossing pulse signal, and a control chip 104 capable of analyzing and processing data of the detection counter 103 and integrating the operation of the other components 102 of the electrical appliance, and a plurality of pins 105 connected to the other components 102 of the electrical appliance are led out from a side of the single chip 101.

When commercial alternating current of 50Hz passes through the detection counter 103, the detection counter 103 detects a zero-crossing pulse signal and calculates specific zero-crossing pulse signal data and transmits the data to the control chip 104, the control chip 104 analyzes and processes the data and integrates the work of other parts 102 of the distributor so as to realize the timing function, the timing accuracy is high, thus the work of other parts 102 of the distributor can be integrated on the basis of the timing function of the zero-crossing timer, the zero-crossing timer times through the frequency of the commercial alternating current of 50Hz, so that a crystal oscillator is not needed to be additionally arranged, the structure is simplified, the hardware cost of a product can be reduced, raw materials can be saved, the production and processing procedures can be simplified, the production cost can be reduced, the market competitiveness can be improved, and as is well known, the frequency of the commercial alternating current is very stable and is not easy to be influenced by various factors such as, the stability can be strong, and the timing precision is high, can ensure the result of use of the timing function of electrical apparatus and other functions, and user experience feels good.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.

Claims

1. The zero-crossing timer in the electric appliance is characterized by comprising a single chip microcomputer connected with 50Hz commercial alternating current, wherein the single chip microcomputer is connected with other components in the electric appliance, the 50Hz commercial alternating current generates 50 cycles per second, namely 100 zero-crossing pulse signals per second, the time interval between the two zero-crossing pulse signals is 0.01S, a detection counter capable of detecting and calculating the zero-crossing pulse signals and a control chip capable of analyzing and processing the data of the detection counter and integrally distributing the work of other components of the electric appliance are arranged in the single chip microcomputer, when the 50Hz commercial alternating current passes through the detection counter, the detection counter detects the zero-crossing pulse signals and calculates specific zero-crossing pulse signal data and transmits the data to the control chip, and the control chip analyzes and processes the data and integrates the work of other components of the electric appliance, so that the timing function is realized.

2. A zero-crossing timer in an electric appliance as claimed in claim 1, wherein a plurality of pins connected with other parts of the electric appliance are led out from the side surface of the single chip microcomputer.