CN2247315Y

CN2247315Y - Fully automatic controller for water heater

Info

Publication number: CN2247315Y
Application number: CN 95228369
Authority: CN
Inventors: 王世曙
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-16
Filing date: 1995-12-16
Publication date: 1997-02-12
Anticipated expiration: 2005-12-16

Abstract

The utility model relates to a fully automatic controller for a water heater, which comprises a sampling unit and a control unit. The utility model is characterized in that three probes of which the arranging heights are different are connected to the pressure dividing loop of the base pole of a triode in the sampling unit, wherein, the first probe passes through the first normally open contact of a water-level relay and then is connected with the second probe, and the third probe is connected with the base pole of the triode. The water-level relay is connected in the collecting electrode loop of the triode, the second normally open contact of the water-level relay, a thermostat and a contactor are connected in series in the control unit and then are connected in parallel with both ends of an AC power supply, the normally closed contact of the water-level relay and an electromagnetic valve are also connected in series and then are connected in parallel with both of the two ends of the AC power supply, and the contactors of an AC contactor is connected with the loop of an electric heating pipe. The utility model has the advantages that cold water and boiled water are separated strictly and can also prevent from water shortage and dry burning.

Description

The calorifier device for automatically controlling

A kind of calorifier device for automatically controlling relates to the water cooking appliance of being with control device.

Existing electric water-boiling device generally adopts ball float to advance water control, and utilizes temperature relay directly to make the on/off element.Chinese patent has disclosed a kind of " water is driven automatic controller " No. 93233103.3, is made up of control circuit and connected probe, button and socket etc. that relay, triode, diode, resistance etc. are formed.Probe is rotated in the venthole place of electric kettle, and the steam of opening the back generation by water makes its conducting, and then cuts off circuit, reaches water and opens the back purpose of powered-down automatically.Technique scheme has following shortcoming or one of them: (1), cold water, boiling water mix.Just start spool immediately because of water level in the calorifier has the decline ball float slightly, cold water is mixed mutually with boiling water; (2), the automatic protection of no lack of water.When improper use or when cutting off the water supply, may cause electrothermal tube to burn, influence safety.

The purpose of this utility model provides a kind of calorifier device for automatically controlling, and it can effectively prevent the mixing of cold water, boiling water.Another purpose of the present utility model provides a kind of calorifier device for automatically controlling, and it can effectively prevent dry combustion method.

The purpose of this utility model is achieved in that this device comprises sampling unit and control module, be characterized in the sampling unit dividing and be connected to different three probes, first probe of setting height(from bottom) in the hydraulic circuit and behind first normally opened contact of level relay, join with second probe at transistor base, the 3rd probe connects transistor base, and level relay is connected in the described transistor collector loop; Be attempted by the AC power two ends after second normally opened contact of control module middle water level relay, temperature controller, the contactor three series connection, also be attempted by the AC power two ends after level relay normally-closed contact, the magnetic valve serial connection, and the contact of A.C. contactor is connected in the loop at electrothermal tube place.

During work, three probes are all put into bucket along with adding second probe of cold water is connected by water liquid with the 3rd probe, and promptly the transistor base loop obtains signal, make level relay work.Level relay first normally opened contact, the second normally opened contact closure thus, the contactor work in the control module, electrothermal tube work.And level relay first probe is also connected with second probe, even water level is lower than second probe, level relay still keeps work.Have only when water level be lower than first the probe or second the probe in any the time, level relay quits work, the contactor dead electricity in the control module, so the electrothermal tube dead electricity stop the heating.

Make two lower probe setting height(from bottom) differences of relative position, can realize the purpose of anti-dry.

The utility model can with cold water, boiling water strictness separately guarantee that the water that is eaten is boiling water.Can also realize that lack of water protects automatically, promptly prevent no-water dry combustion, damage electrothermal tube or other elements.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is according to the calorifier device for automatically controlling mounting structure schematic diagram that the utility model proposes.

Fig. 2 is according to sampling unit circuit theory diagrams in the calorifier device for automatically controlling that the utility model proposes.

Fig. 3 is according to control module circuit theory diagrams in the calorifier device for automatically controlling that the utility model proposes.

Below in conjunction with details and the working condition of accompanying drawing detailed description according to the concrete device that the utility model proposes.

As shown in Figure 1, calorifier comprises a staving (1), be installed in the staving according to three probes (2) in the device for automatically controlling that the utility model proposes, and three is visited the setting height(from bottom) difference.Preferably two probes that relative position is lower are highly also different, so that with the physical circuit combination, reach the anti-dry effect.Magnetic valve (3) is installed in the top of bucket, with the adding of control cold water.Device for automatically controlling (4) is installed in outside the bucket, and it comprises sampling unit and control module.

The circuit theory diagrams of sampling unit are referring to Fig. 2, and the branch hydraulic circuit of triode BG base stage is made of resistance R 2 and R3.Three probe A, B, C are connected on described base stage and divide in the hydraulic circuit.The end of the second probe connecting resistance R2 wherein, first probe B is joined with second probe through the first normally opened contact YJ1 of level relay, and the 3rd probe connects the base stage of triode BG.Resistance R 3 one termination triode BG base stages, another termination dc power anode, another termination dc power cathode of resistance R 2.Therefore when passing through water between each probe during conducting, the voltage on the dc source is added on the base stage of triode BG after R2, R3 dividing potential drop, makes triode BG conducting.Level relay is connected in the collector loop of triode, and transistor emitter connects dc power anode behind Zener diode Z.Resistance R 1 is connected between the emitter stage and dc power cathode of triode BG.

The control module circuit theory diagrams are referring to Fig. 3, and K switch and fuse RD are serially connected in the current supply circuit.Be attempted by the two ends of AC power after the second normally opened contact YJ2, the temperature controller WJ of level relay, the A.C. contactor KM three serial connection again.Also be attempted by the two ends of AC power after the normally-closed contact YJ3 of level relay, the two serial connection of magnetic valve.Wherein, the contact of A.C. contactor KM is serially connected in the loop at electrothermal tube place.Power supply can be adopted powered battery to sampling unit, also can be with alternating current through transformer B step-down, and rectifying and wave-filtering obtains dc source then.For this automaton state of living in is come into plain view, a contact of A.C. contactor is attempted by the AC power two ends after being connected in series with burner on light.The water inlet indicator lamp is attempted by the two ends of magnetic valve DCF.And in order to add the convenient of water in using, at the normally-closed contact YF3 two ends of level relay and meet press button AN, press the button switch AN and can add cold water.

Claims

1. calorifier device for automatically controlling, comprise sampling unit and control module, it is characterized in that in the sampling unit dividing and be connected to three different probes of setting height(from bottom) in the hydraulic circuit at transistor base, first probe joins with second probe behind first normally opened contact of level relay, the 3rd probe connects transistor base, and level relay is connected in the described transistor collector loop; Be attempted by the AC power two ends after second normally opened contact of control module middle water level relay, temperature controller, the contactor three series connection, also be attempted by the AC power two ends after level relay normally-closed contact, the magnetic valve serial connection, and the contact of A.C. contactor is connected in the loop at electrothermal tube place.

2. calorifier device for automatically controlling according to claim 1 is characterized in that two probe setting height(from bottom) differences that relative position is lower.

3. calorifier device for automatically controlling according to claim 1, a contact that it is characterized in that A.C. contactor are attempted by the AC power two ends after with the burner on light serial connection.

4. calorifier device for automatically controlling according to claim 1 is characterized in that into the water indicator lamp is attempted by the magnetic valve two ends, and press button is attempted by level relay normally-closed contact two ends.