CN2371509Y

CN2371509Y - Safety alarm for gas water heater

Info

Publication number: CN2371509Y
Application number: CN 98248989
Authority: CN
Inventors: 黄桂森
Original assignee: JIAXIN ENTERPRISE CO Ltd
Current assignee: JIAXIN ENTERPRISE CO Ltd
Priority date: 1998-11-11
Filing date: 1998-11-11
Publication date: 2000-03-29
Anticipated expiration: 2008-11-11

Abstract

The utility model relates to a safety alarm for a gas water heater, which comprises a switch, a time control circuit, a working voltage control circuit, a high-voltage ignition circuit and a flame sensing circuit which are connected with each other, and also comprises a two-segment timing circuit and an early warning alarm circuit, wherein, the time control circuit and the working voltage control circuit are connected with the two-segment timing circuit and the early warning alarm circuit; the two-segment timing circuit is an oscillator; the early warning alarm circuit is a switch circuit which comprises a field effect transistor and a resistor; an alarm mainly comprises an oscillator wafer and a buzzer. The two-segment timing circuit and the early warning alarm circuit are utilized to make the gas water heater carry out timing alarm and ensure safety.

Description

The safety alarm device of gas heater

The utility model relates to a kind of safety alarm device of gas heater, it is provided with two-period form timing circuit and warning circuit: when water heater start use reaches first section timing of two-period form timing circuit, just can drive the alarm sounding, when reaching second section timing, the combustion gas of cutting off on the fuel gas pipeline of then cutting off the power supply is automatically exported, and guarantees user's safety by this.

The coal gas combustion gas is the indispensable energy in the modern life, the gas burner of the usefulness of generally cooking, the gas heater that bathing is used, all depend on coal gas to make the energy, so coal gas is bringing great convenience property of civilized life, but also also bring many problems, therefore for example coal gas fire, the poisoning that leak and caused used coal gas and can be caused disaster if having accidentally.

At present, gas water heater all has the safety design of time control igniting to guarantee that igniting not exclusively, and exceeding the Preset Time switching coal gas of just cutting off the electricity supply, as long as yet finish the igniting action, safety device is just lack scope for their abilities, uniquely can cut off just only just finishing by opening and closing the hot water tap of fuel gas pipeline, but if the hot water line has been corroded because of destruction or start unusually, add that ventilation effect is not good, then will cause anoxycausis and cause anthracemia; When using water heater to close, when water heater is not had warning function, cause dangerous the opportunity of requiring assistance forfeiture as old weak person.

Main purpose of the present utility model be to provide a kind of can be according to the safety alarm device of the gas heater that sends alarm signal service time.

For achieving the above object, the utility model is taked following measure:

The utility model utilizes the arrange in pairs or groups warning circuit of an early warning of a two-period form timing circuit to form a holding circuit; just opening the two-period form timing circuit automatically when gas heater is started shooting use at every turn picks up counting; when reach first section timing service time; warning circuit just can send the behaviour in service that acoustical signal is informed user or indoor other people water heater; reach to help to take the necessary measures and to guarantee safety; again when reaching second section timing after a while; water heater stops heating with automatic self-closing gas and is holding state, and alarm continues to make a sound till situation is got rid of.

The utility model is taked following concrete structure:

Gas heater safety alarm device of the present utility model comprises: a switch, for the moment control circuit, an operating voltage control circuit, a high-tension ignition circuit and a flame detector circuit, connect between each circuit, and a battery provides power supply; Switch is used to control the startup of gas water heater, and collocation time control firing circuit and operating voltage circuit operation, when switch open, the igniting of high-tension ignition circuit, and by flame detector circuit detect light a fire finish after, open main burner water heated; It is characterized in that: also comprise: a two-period form timing circuit and an early warning and alarming circuit;

Time control firing circuit and operating voltage control circuit connect two-period form timing circuit and early warning and alarming circuit;

The two-period form timing circuit is an oscillator, and it mainly is made up of triode G8, inductance L 1, resistance R 11; The early warning and alarming circuit is an on-off circuit, and it comprises: a field-effect transistor FET and resistance R 14; Alarm 19 mainly comprises: an oscillator wafer U1 and a buzzer.

The two-period form timing circuit utilizes conversion of electric capacity current potential and the characteristic that discharges and recharges, and discharges after a period of time, drives the warning circuit action, reaches second section timing again after a period of time, the automatic self-closing gas pipeline.

Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows the utility model:

Description of drawings:

Fig. 1: the circuit block diagram of the utility model embodiment.

Fig. 2: the circuit diagram of the utility model embodiment.

Fig. 3: flow chart of the present utility model.

Fig. 4: current potential one time relation schematic diagram of the present utility model.

See also shown in Fig. 1,2, gas water heater includes a switch 11, for the moment control circuit 12, an operating voltage control circuit 13, high-tension ignition circuit 14 and flame detector circuit 15, interconnects between each circuit, and battery 16 provides power supply; Wherein, the startup of switch 11 major control gas water heaters, and the time control circuit 12 and the operating voltage control circuit 13 that are connected with switch 11, when switch 11 is opened, to impel high-tension ignition circuit 14 and flame detector circuit 15 actions, with the flame of lighting water is heated, above circuit design is identical with the circuit design of commonly using, so do not give unnecessary details.

And principal character of the present utility model, be that a two-period form timing circuit 17 is connected with an early warning and alarming circuit 18, and timing circuit 17 links to each other with switch 11 again, wherein, timing circuit 17 and early warning and alarming circuit 18 are by transistor, inductance, resistance, electric capacity and integrated circuit component are formed, and the capacity cell in the timing circuit 17 is with the charge-discharge characteristic of himself, after a period of time, discharge, after the discharge, just can order about 18 actions of early warning and alarming circuit, make the alarm 19 in the early warning and alarming circuit 18 send the alarm signal (sound, or alarm is a then light-emitting caution signal of illuminator), after a while, then can directly close the coal gas fuel gas pipeline, to guarantee user's safety.

As shown in Figure 2, timing circuit 17 is an oscillator, and it is made up of triode G8, inductance L 1, resistance R 11; Early warning and alarming circuit 18 is an on-off circuit, and it comprises: field-effect transistor FET and resistance R 14; Alarm 19 mainly comprises: an oscillator wafer U1 and a buzzer.

More specific description sees also shown in Fig. 2,3,4, after the switch of gas water heater 11 is opened, the time control circuit 12 start, and keep 60 seconds time control, simultaneously, timing circuit 17 also starts, and the time of keeping 20 minutes is controlled.

Then, the time control circuit 12 at once cooperating voltage control circuits 13 order about 14 igniting of high-tension ignition circuit, make the coal gas that is flowed out through fire guider magnetic valve 20 light (female fire), and ordering about flame detector circuit 15, the coal gas that flows through main combustion flame magnetic valve 21 with inspection is lighted state (son fire).

When timing circuit 17 is fetched boiling water when tap reaches first section timing the time the user, the present embodiment design is to surpass after 18 minutes, just can send a signal automatically and give early warning and alarming circuit 18, and the alarm 19 in the early warning and alarming circuit 18 just begins action, and action in lasting two minutes, promptly reached second section timing in two minutes after first section timing, water heater is just closed the coal gas fuel gas pipeline automatically.

At this moment,, just can during warning, turn off tap, switch 11, timing circuit 17, alarm 19 are closed if the user is in waking state, and the state of a control when opening tap again and then being returned to aforesaid igniting and heating; But if the user is when having accident to close tap, and the coal gas fuel gas pipeline still can be closed after reaching second section timing time after a while.Simultaneously alarm 19 is continuous action, and thus, the people one the bathroom outside discovers alarm 19 yowls and do not stop, and just can be detected user's situation, and found that in time accident handles immediately, to exempt the tragedy generation at once.

Compared with prior art, the utlity model has following effect:

Because the utility model increases two-period form timing circuit and an early warning and alarming circuit, makes combustion gas Water heater is more practical, though device of the present utility model can not surpass when presetting by type discharge hot water Between, such as 20 minutes, but can be with the user by the action of a slight switch tap Whether still for regaining consciousness, have or not danger situation, the household who conveys to fast outside the bathroom knows in the bathroom Dawn, guaranteeing in time to send alarm signal, practicality of the present utility model under the safe front topic Can compare with the non-general gas water heater of progressive.

Claims

1, a kind of safety alarm device of gas heater comprises: a switch, for the moment control circuit, an operating voltage control circuit, a high-tension ignition circuit and a flame detector circuit, connect between each circuit, and a battery provides power supply; Switch is used to control the startup of gas water heater, and collocation time control firing circuit and operating voltage circuit operation, when switch open, the igniting of high-tension ignition circuit, and by flame detector circuit detect light a fire finish after, open main burner water heated; It is characterized in that: also comprise: a two-period form timing circuit and an early warning and alarming circuit;