CN2254520Y

CN2254520Y - Safety device for flameout of double-stable state gas burner

Info

Publication number: CN2254520Y
Application number: CN 96231491
Authority: CN
Inventors: 朱日昭
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-25
Filing date: 1996-03-25
Publication date: 1997-05-21
Anticipated expiration: 2006-03-25

Abstract

The utility model relates to a safety device for flameout of a bistable state gas burner, which is of a novel fitting of the gas burner. The utility model which belongs to an electromechanical integration structure is designed by making use of a bistable principle. A permanent magnet is added on the opening state of the device. Consequently, the utility model has the advantages of simple structure, the omission of parts of a control system, improved high reliability and reduced consumption of a dry battery. In addition, the structure is more favorable to the adoption of a novel sensor.

Description

Bistable state Gas appliance flame-out protection device

The utility model relates to the safety guard of Gas appliance.

Automatically die after fray-out of flame in order to reach combustion gas (oil liquefier, natural gas, artificial coal gas) tool, generally employing mode is at present: (1) thermocouple-solenoid electromagnetism hold mode; (2) mode of dry cell-solenoid and thermocouple-solenoid relay maintenance.

The weak point of above-mentioned dual mode is: (1) simple thermocouple-solenoid hold mode is at the igniting initial stage, because the thermal inertia of thermocouple, can not produce enough electromotive force in several seconds, thereby no enough electric currents flow through on the solenoid, do not produce the ability of (overcoming spring force) adhesive armature, thereby, must press the several seconds by operator's hand, treat can slip out of the hand after the thermocouple combustion heat, automaticity is low.(2) auxiliary solenoid produces magnetic field at the igniting initial stage with battery electric quantity and keeps the several seconds with relay, keeps usually more than the power 0.1w, and battery consumption is fast, and its frame for movement and automatic control system complex structure, and reliability is not high, and cost improves.

The purpose of this utility model is at the deficiency in the existing flame-out protection device, propose a kind of convenient, address the above problem reliably, again can simplified structure, reduce the energy consumption of battery, improve the device of the global reliability of combustion gas tool.

Solution of the present utility model is: be provided with bistable valve on combustion gas tool air inlet one blanket.

The utility model adopts conventional bistable electromagnetic valve, all must consumed power in the maintenance process under opening and closing two states, and avoided the labyrinth of twin coil, reliability also is improved.

The further improvement of the utility model can take soft iron core (with coil stationary together) motionless, and the mode that permanent magnet (being fixed together with push rod, rubber gasket) moves, electromagnetic action discharges under the occasion of closure valve manually driving valve for this, is highly significant.

Below the utility model is described in further detail by drawings and Examples:

Fig. 1 is (opening state) schematic diagram that is used for flame-out protection device on the gas furnace

Fig. 2 is (closed condition) schematic diagram that is used for flame-out protection device on the gas furnace

In Fig. 1, sealing gasket 5 is affixed by a connecting rod (spool) with permanent magnet, and spring 4 is located on the sealing gasket connecting rod, and coil 1 is fixed on the valve seat 6 coil external power supply, capacitor discharge circuit and correspondent control circuits with armature 2.The sensor of control circuit can be

Optocoupler, thermocouple etc.

Below; with reference to accompanying drawing, the course of work of this flame-out protection device is described: the push rod that rubber seal is used sealing gasket 5 is pushed open (so combustion gas enter in the stove for burning with) and the permanent magnet 3 of 5 interlocks move to left, and with armature 2 adhesives; so combustion gas just is admitted to the combustion chamber continuously.Because be permanent magnet and armature adhesive, thereby, must not consider the existing maintenance problem of similar functions protective valve in thermocouple heats up a break time.

Another embodiment bistable structure of CN85201056 structure, permanent magnet is fixed, and soft iron is with valve core movement.

Just close artificially or during non-normal flameout, sensor just drives solenoid and passes to pulse current (pulse width number millisecond), because of this electromagnetic field direction opposite with the permanent magnet magnetic field direction, thereby, permanent magnet moves to right under the acting in conjunction of electromagnetism counter-force and spring force together with sealing gasket 5, so valve closing, gas circuit disconnects.

The sensor that the order flame-out protection device cuts out can be a thermocouple, also can be flame probe or photoelectric receiving arrangement.

Claims

1. the flame-out protection device of a Gas appliance comprises that compositions such as magnetic valve, power supply, sensor is characterized in that being provided with bistable valve on combustion gas tool air inlet-fiery protective device of combustion.

2. by the described device of claim 1, it is characterized in that the armature (2) of bistable valve is fixed on the pedestal (6), and permanent magnet (3) can the shift position with sealing gasket (5).

3. by the described device of claim 1, it is characterized in that coil external power supply, capacitor discharge circuit and correspondent control circuits.The sensor of control circuit can be optocoupler, thermocouple, the flame pin.