CN201160781Y - Intelligent electric shock-proof energy-saving drinking water machine - Google Patents

Abstract

The utility model relates to an intellectualized anti-electric shock and energy saving water dispenser, in particular to a water dispenser which can automatically determine the appropriate unused time and can automatically distinguish whether dangerous voltage which is possible to hurt the human body exists in the water dispenser or not. By adopting a single-chip microcomputer control technology, anti-electric shock signals are input to a single-chip microcomputer in the form of linear variation analog quantity, an I/O terminal of the single-chip microcomputer can control whether the anti-electric shock output loop performs the protecting action or not, a monolithic clock circuit is connected with the serial port of the single-chip microcomputer, a key combination is connected with an A/D terminal of the single-chip microcomputer through a wire, a heating pipe driving circuit is composed of an I/O terminal of the single-chip microcomputer through a light coupling circuit driving power transistor, and the other I/O terminals of the single-chip microcomputer are connected with an LED numerical code display circuit. The single-chip microcomputer can momentarily track and compare the difference value between the real-time hot water temperature and the set value and can determine the unused time through dynamic refresh.

Description

A kind of energy-saving drinking machine of intelligent protection against electric shock

Affiliated technical field

The utility model relates to a kind of intelligentized drinking device; especially can automatically determine the suitable unused time; and can automatically discern water dispenser and whether have the dangerous voltage that might form injury to human body, and then take the water dispenser of corresponding protection measure automatically.

Background technology

At present, most of water dispenser initiative electroshock-proof function of not possessing automatic shutdown and tackling domestic power utilization environment hidden danger.The part water dispenser possesses the timing shutdown function, but needs the people to intervene setting; There is open report to adopt the anti-electric wall technology of logic judging method, but on resolution capability, has certain limitation.

Summary of the invention

In order to overcome the shortcoming of existing water dispenser on shutdown and electroshock-proof function, the utility model provides a kind of intelligent water dispenser, it can when unmanned drinking water in a relative long period, shut down for energy savings automatically from motion tracking people's drinking-water activity; And can differentiate and show the value of voltage difference between working zero line and the protective grounding line easily, this value is taked corresponding protection against electric shock measure immediately automatically in case human body constituted to get an electric shock threaten.

The technical scheme that its technical problem that solves the utility model adopts is: protection against electric shock signal input circuit (4) is taken from the voltage difference of working zero line N and protective grounding line PE; behind the step-down isolation rectification; input to an A/D input of single-chip microcomputer (1) with the form of linear change analog quantity; the value of voltage difference between working zero line and the protective grounding line not only can be differentiated and show to single-chip microcomputer easily; and according to the size of this value, an I/O terminal of single-chip microcomputer (1) can control that protection against electric shock output loop (3) is carried out or not execute protection action.The SCLK of monolithic clock circuit (2), I/O, and three I/O terminals of RET and single-chip microcomputer (1) link to each other, constituting serial ports connects, two thermistor temperature sensors are installed in respectively on hot courage of water dispenser and the cold courage courage wall, the terminal pin of hot water temperature's sensor (9) and cold water temperature sensor (5) is connected respectively to two A/D inputs in addition of single-chip microcomputer (1), heating tube drive circuit (8) is made of by light idol circuit drives power transistor an I/O terminal of single-chip microcomputer (1), other I/O terminal mouths of single-chip microcomputer (1) link to each other with the digital display circuit of LED (7), and key combination (6) links to each other by an A/D terminal of a lead and single-chip microcomputer (1).When the drinking water people by after the temperature of drinking water of having pressed key assignments, single-chip microcomputer is according to the temperature sampling result, automatically water temperature is adjusted to design temperature and in addition digital the demonstration, during someone water, bigger in short-term variation can take place in water temperature, during unmanned water, water temperature can be stabilized on the critical value always, when single-chip microcomputer detects water temperature in one long relatively period bigger in short-term variation is not arranged, promptly be considered as unmanned water, the water dispenser energy saver mode can change the shutdown holding state automatically over to.

The beneficial effects of the utility model are, are that the telemetry circuit of core is simple in structure with the single-chip microcomputer, and diverse in function can prevent effectively that again human body from getting an electric shock because of power utilization environment hidden danger when making drinking machine apparatus performance energy-saving effect.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a circuit part functional-block diagram of the present utility model, form by nine parts: single-chip microcomputer (1), monolithic clock circuit (2), protection against electric shock output loop (3), protection against electric shock signal input circuit (4), cold water temperature sensor (5), key combination (6), the digital display circuit (7) of LED, heating tube drive circuit (8), hot water temperature's sensor (9).

The specific embodiment

In the present embodiment, the chip that single-chip microcomputer (1) adopts is PIC16F873, and its AN0, AN1, four A/D input terminals of AN2, AN3 are corresponding hot water temperature's sensor (9), cold water temperature sensor (5), protection against electric shock signal input circuit (4), (6) four analog quantity sources of key combination respectively; Wherein: temperature sensor adopts thermistor (temperature) sensor; The modulation range of protection against electric shock signal input circuit (4) is at DC 0-5V, the value of voltage difference is 0-250V between corresponding working zero line and the protective grounding line, when the value that is equivalent to voltage difference between working zero line and the protective grounding line when the equivalent of A/D sampled value meets or exceeds 36V, safety for the guarantor, single-chip microcomputer (1) will provide alarm signal, RB7 by PIC16F873 drives protection against electric shock output loop (3) simultaneously, cut off the input of AC power and PE line, this loop is made up of transistor and relay; In order to save the limited resources of single-chip microcomputer (1), key combination (6) is made up of resistor network, adopts the way of A/D scanning to differentiate.Utilize the PWM output function of RC1 terminal to connect heating tube drive circuit (8), pass through the photoelectricity isolation link therebetween after, drive the temperature that high power transistor is controlled water in the hot courage.Monolithic clock circuit (2) adopts the DS1302 chip, its SCLK, I/O, and the RET terminal link to each other with RC2, RC3 and three I/O terminals of RC0 of single-chip microcomputer (1) PIC16F873 respectively, constituting serial ports connects, single-chip microcomputer (1) carry out temperature sampling, automatically when shutdown, time showing and real-time clock all to carry out real-time Communication for Power.RC4, RC5, RC6, RC7, the RB0-RB6 of single-chip microcomputer (1) PIC16F873 is used for the dynamic demonstration to (7) four LED charactrons of the digital display circuit of LED, when content comprises the cold temperature value of real-time heat, desired temperature, automatic shutdown time, school, real-time time, dangerous voltage warning etc.When the drinking water people by after the temperature of drinking water of having pressed key assignments, single-chip microcomputer is according to the temperature sampling result, automatically water temperature is adjusted to design temperature and in addition digital the demonstration, during someone water, outflow along with hot water in the hot courage, Jia Re cold water can not replenish timely, the bigger in short-term variation that responsive single-chip microcomputer (1) will detect water temperature in time and be taken place by hot water temperature's sensor (9); And during unmanned water, water temperature can be stabilized on the critical value always, when single-chip microcomputer (1) does not detect water temperature in one long relatively period bigger in short-term variation is arranged, and promptly is considered as unmanned water, and the water dispenser energy saver mode can change the shutdown holding state automatically over to.

Claims (1)

1. A kind of energy-saving drinking machine of intelligent protection against electric shock; adopt single-chip microcomputer control technology; the feature of its electronic control circuit plate is: protection against electric shock signal input circuit (4) is taken from the voltage difference of working zero line N and protective grounding line PE; behind the step-down isolation rectification; input to an A/D input of single-chip microcomputer (1) with the form of linear change analog quantity; an I/O terminal control protection against electric shock output loop (3) of single-chip microcomputer (1) is carried out or not execute protection action; the SCLK of monolithic clock circuit (2); I/O; and three I/O terminals of RET and single-chip microcomputer (1) link to each other; constituting serial ports connects; two thermistor temperature sensors are installed in respectively on hot courage of water dispenser and the cold courage courage wall; the terminal pin of hot water temperature's sensor (9) and cold water temperature sensor (5) is connected respectively to two A/D inputs in addition of single-chip microcomputer (1); heating tube drive circuit (8) is made of by light idol circuit drives power transistor an I/O terminal of single-chip microcomputer (1); other I/O terminal mouths of single-chip microcomputer (1) link to each other with the digital display circuit of LED (7), and key combination (6) links to each other by an A/D terminal of a lead and single-chip microcomputer (1).

Images