CN1325003A

CN1325003A - Technological method of ensuring personal safety against water heater

Info

Publication number: CN1325003A
Application number: CN 00110436
Authority: CN
Inventors: 申忠玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-22
Filing date: 2000-05-22
Publication date: 2001-12-05

Abstract

The detector is mounted in area having need of safe protection, after the human body comes into the protective area, the detected signal can be outputted by detector, and transferred into switching circuit, which is used for controlling water-heater system to ensure safe application of water-heater. Said method can basically solve the hidden peril resulted from leakage of gas or leakage of electricity when the gas water-heater or electric water-heater is used.

Description

A kind of technical method that is used for water heater personal safety protection

The present invention relates to a kind of technical method that is used for water heater personal safety protection.

Though popularizing of water heater brings convenience for people's life in the actual life, also give people's life security simultaneously because of its many unsafe factor and bring injury hidden danger.The straight-line gas heater, though be a kind of relatively backward product, but the whole nation approximately also has millions of still in use now, the water heater of this structure very easily causes gas poisoning because air draft is bad, causes personnel's death, even if the user who has is at the indoor ventilating fan that is equipped with, but because of not being automatic control, carelessness is arranged slightly, just can breed disaster.In recent years, electric heater was put on market in a large number, but perplexed people's the safety problem that is still.The electric heater of this structure, though taked some safety measures, but still have some unsafe factors, as: 1, the ground connection of electric heater.Usually the practice be with ground wire by on water pipe or steam heating pipe, not can play the reliable protection effect, even there is unified earth connection can not keep permanently effective ground connection, therefore electric leakage causes personnel death's quantity increasing year by year.2, has earth leakage protective device.So-called earth leakage protective; also be when human body passes through a certain amount of electric current, could move; and existing earth leakage protective device neither be all the electric leakage form can both be protected, cause the thing of personal safety accident just to happen occasionally like this, bring very big loss for people's lives and properties.How to guarantee to use safely water heater, be people's technical barriers anxious to be solved always.

The objective of the invention is provides a kind of technical method that will be used for the detector of burglar alarm field or automatically-controlled door control to be diverted to the technical method in water heater personal safety protection field to people.

For achieving the above object; the present invention has adopted following technical scheme: a kind of technical method that is used for water heater personal safety protection; detector is installed in the zone that needs safeguard protection; after human body enters the protection zone; detector is exported to on-off circuit with the signal of surveying; by on-off circuit control water-heater system, guarantee safe handling.

Characteristics of the present invention are: 1, enter when Danger Electric shock risk regional might take place as people one, water heater personal safety protector just can cut off the power supply immediately automatically, can guarantee off-position all the time in the scope of protection zone.When the people leaves the protection zone, also can select delay circuit, the time of energising to be delayed, energising again can be guaranteed personal safety.2, exhaust system is given in the pressure that can be used for gas heater, when the people enters the protection zone, starts exhaust system automatically, guarantees personal safety.3, human body need not contact and can cut off the power supply with water-heater system.

The present invention is further detailed explanation below in conjunction with specific embodiment and accompanying drawing.

Fig. 1 is a block diagram of the present invention.

Fig. 2 realizes a kind of circuit theory diagrams of the present invention.

With reference to Fig. 1, a kind of technical method that is used for water heater personal safety protection is installed in detector in the zone that needs safeguard protection; after human body enters the protection zone; detector is exported to on-off circuit with the signal of surveying, and by on-off circuit control water-heater system, guarantees safe handling.Its dc source, on-off circuit, detector and water-heater system are not mounted in the housing, and wherein arbitrary part or several portions are to be installed in the other housing, connect by lead or antenna mode each other.

With reference to Fig. 2, with electric main 220V after the transformer step-down by diode D1-D4 rectification, capacitor C 1-C4 filtering, the positive and negative 12V DC voltage of output after integrated regulator IC1 (7812) and IC2 (7912) voltage stabilizing is for the use of detector and on-off circuit.Detector constitutes by transmitting and receiving two parts, and radiating portion constitutes the 1st pin ground connection of IC3 by IC3 (NE555) and outward element, 2nd, 6 pin link, and by capacitor C 7 ground connection, and link by diode D5 and the 7th pin, the anode of D5 connects 2,6 pin, and negative electrode connects 7 pin; 2,6 pin also link with the negative electrode of diode D6, and the anode of D6 connects the 7th pin by resistance R 2, and the 7th pin links by resistance R 1 and the 4th, 8 pin and is connected on the positive supply.The 3rd pin of IC3 is by resistance R 3 ground connection, and connect the base stage of transistor Q1 by resistance R 4, the grounded emitter of Q1, the negative electrode of colelctor electrode and light emitting diode D8 and the anode of diode D7 link, and connect positive supply by resistance R 5 after the anode of D8 and the negative electrode of D7 link.Receiving unit, the colelctor electrode of photoelectric tube Q2 connects positive supply, emitter stage and capacitor C 8 and resistance R 8 link, the other end ground connection of R8, the 3rd pin of another termination IC4 of C8, and by resistance R 9 ground connection, the 2nd pin of IC4 connects the sliding end of potentiometer W1, the stiff end ground connection of W1, another stiff end connects positive supply by resistance R 7, the 7th of IC4, the 8 pin positive supply that links, the 4th pin connects negative supply, and the 1st pin of IC4 connects the 4th pin of IC5:A and by resistance R 6 ground connection, the 8th pin ground connection of IC5:A, the 3rd, the 5 pin positive supply that links, the 2nd pin link to each other with the 1st pin by capacitor C 9 and link by resistance R 10 and positive supply, and the 6th pin and on-off circuit input link.Relay is to link to each other with power supply by contact one end with the water-heater system and the connection of power supply, and the other end and water-heater system R link, the contact is controlled by coil, the coil of relay is connected on the colelctor electrode of dc source and transistor Q3, the base stage of transistor Q3 links by the output of resistance R 12 AND IC6B and the input of another nor gate IC6A, another input of IC6B and the output of IC6A link, another input and the capacitor C 10 of IC6A link, and link by the output of two branch road AND IC6C, a branch road is that potentiometer W2 and resistance R 11 are in series, another branch road is diode D9, its anode meets C10, and negative electrode connects the output of IC6C, the other end ground connection of C10, two input parallel connections of IC6C connect the output of detector.Its operation principle is: detector as shown in Figure 2, integrated timer IC3 and resistance R 1, R2, capacitor C 7, diode D5, D6 constitute multivibrator, output is amplified rear drive infrarede emitting diode D8 emission infrared pulse through transistor Q1.D8 and Q2 constitute reflective IR people locator, when human body enters detecting area, Q2 receives the infrared pulse by the human body reflection, is coupled to the in-phase input end of voltage comparator ic 4 through capacitor C 8, regulator potentiometer W1 can change the size of reference voltage, thereby changes receiving sensitivity.When input pulse during greater than reference voltage, IC4 output output positive pulse, the continuous high level V0 of output behind monostable flipflop IC5 broadening.After human body left detecting area, Q2 did not receive the infrared pulse by the human body reflection, and IC4 is output as 0.Dc switch as shown in Figure 2, as input V0 when being high level, nor gate IC6B is output as low level, transistor Q3 ends, the relay J outage.Simultaneously, the IC6C output low level, capacitor C 10 makes IC6A be output as high level through diode D9 discharge, is output as low level to guarantee IC6B, and transistor Q3 ends, the relay outage.When input V0 is low level,, make IC6B output remain low level because IC6A is output as high level, the Q3 remain off, the relay outage, IC6C is output as high level simultaneously, give capacitor C 10 chargings through resistance R 11 and potentiometer W2, capacitance voltage rises, after delay a period of time, when voltage reaches the switching levels of IC6A, its output becomes low level, make the output of IC6B become high level, transistor Q3 conducting, relay J energising.Regulate W2 and can change time delay.Alternating-current switch as shown in Figure 2, when relay J was switched on, contact J-1 and J-2 closure were given water-heater system R power supply.During the relay J outage, contact J-1 and J-2 disconnect, and make water heater break away from AC power, reach the purpose of safeguard protection.During use; when with the supporting use of electric heater, circuit is in normally off, when people one enters when Danger Electric shock risk regional might take place; water heater personal safety protector just can be by on-off circuit control outage automatically immediately, and the people can guarantee off-position all the time in the scope of protection zone.When the people leaves the protection zone, also can pass through delay circuit, the time of energising to be delayed, energising again can be guaranteed personal safety.When with the supporting use of gas heater, relay contact is in normally open, connects with ventilating fan, and the closing of contact in the people enters the deathtrap will force to guarantee personal safety to air draft.

Claims

1, a kind of technical method that is used for water heater personal safety protection; it is characterized in that: detector is installed in the zone that needs safeguard protection; after human body enters the protection zone; detector is exported to on-off circuit with the signal of surveying; by on-off circuit control water-heater system, guarantee safe handling.

2, the technical method of water heater personal safety protection according to claim 1; it is characterized in that: described dc source, on-off circuit, detector and water-heater system are not mounted in the housing; wherein arbitrary part or several portions are to be installed in the other housing, connect by lead or antenna mode each other.

3; the technical method of water heater personal safety protection according to claim 1; it is characterized in that: described on-off circuit is that the coil with relay is connected on the colelctor electrode of dc source and transistor Q3; the base stage of transistor Q3 links by the output of resistance R 12 AND IC6B and the input of another nor gate IC6A; another input of IC6B and the output of IC6A link; another input and the capacitor C 10 of IC6A link; and link by the output of two branch road AND IC6C; a branch road is that potentiometer W2 and resistance R 11 are in series; another branch road is diode D9; its anode meets C10; negative electrode connects the output of IC6C; the other end ground connection of C10; two input parallel connections of IC6C connect the output of detector.