CN2308217Y

CN2308217Y - Electronic quick heating apparatus for automatic thermos bottle

Info

Publication number: CN2308217Y
Application number: CN 97221695
Authority: CN
Inventors: 俞虹
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-21
Filing date: 1997-07-21
Publication date: 1999-02-17
Anticipated expiration: 2007-07-21

Abstract

The utility model relates to an electronic automatic quick heating apparatus for thermos bottle, which is an automatic heating apparatus for thermos bottle. When the power supply voltage is supplied to an R < 1 > and a C-[3], the temperature discrimination circuit which is composed of an NE555 can make a pin 2 change from low level into high level and make a pin 3 output high level all the time. When water is boiled, a pin 6 is changed from the original low level into high level, the pin 3 outputs low level, the R < 1 > and the C-[3] are directly connected with a power supply, one end of the resistance is connected with the positive pole of the power supply, one end of the capacitor is connected with the negative pole of the power supply, and the NE555 is used as an electric discharge equivalent resistance so that the circuit output can obtain the specified changes of high level and low level.

Description

Electronics automatic hot-water bottle quick heater

The utility model is a kind of thermos automatic heating device.

General automatic quick heater is machinery control, and this machine control unit adopts the steam impulse machine spare after water is opened to cut off the electricity supply.Owing to adopt the mechanical device life-span shorter, it is clean to exist big current contact easily to burn simultaneously, problem such as can not report to the police.The automatic quick heater of for example having produced of sky Xiang board (having the lack of water function of automatically cutting off).

The utility model is short in order to solve above-mentioned life-span, and problem such as can not report to the police designs.

The utility model purpose is performed such, and behind the power connection, transformer B drops to 6V to the voltage of alternating current 220V, by diode D ₆, D ₇Carry out full-wave rectification, C ₆After the filtering as the power supply of circuit.Form judging circuit, R by elements such as time-base circuit NE555 _tBe thermistor, during heating it put into water.2 pin of NE555 are high level when beginning, along with capacitor C ₃The carrying out of charging becomes low level very soon.At this moment 6 pin are low level, 3 pin output high level, and voltage passes through R ₄Be added to and make the controllable silicon conducting on the controllable silicon, the heating tube heating.Along with the carrying out of heating, the temperature of water constantly rises, R _tResistance diminish, after water was opened, 6 pin were high level, made 3 pin output low levels, controllable silicon ends, heating tube stops heating, at this moment, has pushed alert locations as switch, direct voltage is by diode D ₃D ₄Be added to and send chimes of doom on the alarm.

The utility model adopts controllable silicon as the element of cutting off the electricity supply, and does not have the contact, is difficult for burning clean.Simultaneously, use the main element of integrated circuit as the temperature judging circuit.The precision height, function many (as need not at every turn heat the time by switch, heating repeatedly).

The physical circuit and the structure of utility model are provided by accompanying drawing.

Fig. 1 is an electrical schematic diagram, and Fig. 2 is the logic function figure of NE555, and Fig. 3 is heater structure figure.In the structure chart 1---plug, 2---circuit box, 3---venthole, 4---thermistor, 5---heating tube.

In the electrical schematic diagram of Fig. 1, the voltage of 220V produce after by transformer B step-down two 6V by diode D ₅, D ₆Carry out full-wave rectification, and pass through C ₅Filtering after produce the direct voltage of 8V, NE555, C approximately ₁～C ₄, R _t, R _pForm the temperature judging circuit.Include comparison circuit and logic function circuit two parts in the NE555, concrete logic function figure as shown in Figure 2.During beginning, because the effect of RC charge-discharge circuit makes C ₃Both end voltage can not be suddenlyd change, and becomes high level by low level.2 pin and 6 pin are low level, thus 3 pin output high level, and the electric current of the about 30mA of output makes the controllable silicon conducting, the heating tube heating.Then, along with C ₃Charging, 2 pin are high level, 6 pin keep low level, make 3 original pin high level constant, water is opened back 6 pin and is become high level, 2 pin also are high level, 3 pin output low levels, the current interruptions of output.Controllable silicon ends, and stops heating.Ordinary circumstance can not have the situation of 2 pin low levels and 6 pin high level to occur.Warning circuit is switched on or switched off by 2 * 2 toggle switches.The alarm active news Chinese percussion instrument of 9V.C ₁And C ₂Be anti-interference capacitor, prevent that circuit from disturbing the misoperation that produces owing to electrical equipment.RP is that temperature is differentiated adjusting resistance, D ₁, D ₂Be respectively heating, the indication luminous tube of reporting to the police, L is a heating tube, D ₂, D ₄Be buck diode, R ₁General use 3K Ω's in order to avoid cause the stipulated time can't put the situation of electricity.

Claims

1, the automatic quick heater of forming by electronic circuit, its hot water bottleneck has a venthole, be used for water open the back steam run out of, it is characterized in that: temperature element is placed in the plastic tube, be fixed on the venthole center, and in the water of its immersion thermos, control section is detected by electronic component, and the heating state of heating tube is differentiated and controlled by controllable silicon to electronic circuit.

2, device according to claim 1 is characterized in that doing the temperature that temperature element is also directly accepted water with thermistor.

3,, it is characterized in that carrying out temperature by the circuit that NE555 time-base circuit and some other peripheral cell are formed differentiates according to the described device of claim 1.

4。Device according to claim 1 is characterized in that warning device is with active news Chinese percussion instrument.

5, according to claim 1,3 described devices, it is characterized in that carrying out high low level control with the RC charge-discharge circuit.

6, according to claim 1,3 described devices, it is characterized in that with being connected on R _tAnd R _POn electric capacity eliminate interference.