CN2638118Y

CN2638118Y - Control circuit for electrothermal water bottle

Info

Publication number: CN2638118Y
Application number: CN 03267324
Authority: CN
Inventors: 高汝培
Original assignee: APARQI ELECTRICAL EQUIPMENT Co Ltd ZHONGSHAN CITY
Current assignee: APARQI ELECTRICAL EQUIPMENT Co Ltd ZHONGSHAN CITY
Priority date: 2003-07-03
Filing date: 2003-07-03
Publication date: 2004-09-01
Anticipated expiration: 2013-07-03

Abstract

A control circuit for electric boiling water bottle comprises a heating circuit 1, a work status indicator circuit 2, a main control circuit 3 and a variable voltage rectifier circuit 4 and also a high-temperature measurement sensor 5 and a controlled switch 6. The controlled switch 6 is positioned between a commercial power and the heating circuit 1; the high-temperature measurement sensor 5 is positioned at the bottom of the electric boiling water bottle and the output terminal thereof is connected with an input terminal of the main control circuit 3 while an output terminal of the main control circuit 3 is connected with a control terminal of the controlled switch 6. When the electric boiling water bottle lacks of water, the control circuit can automatically cut the power of a heating wire for boiling water and avoid high temperature by dry burning inside the refill of the electric boiling water bottle. The control device also has sound alarm component. Therefore, the alarm sound can be heard by people even not around the electric boiling water bottle and the alarming effect is enhanced. The heating wire for boiling water continues to work about 1-2 minutes after water boiling under the control of a delaying control circuit for re-boiling to boil water completely, thus providing more reliability for the device.

Description

A kind of control circuit of electric-heating thermos

1, technical field:

The utility model relates to a kind of control circuit of electric-heating thermos.

2, background technology:

The control circuit of traditional electric-heating thermos is relatively simple for structure, function is perfect inadequately, mainly there are the following problems: 1) when the electric-heating thermos lack of water, insulation heater strip and heater strip to boil water still work on, cause the inner bag of electric-heating thermos partly to produce dry combustion method high temperature, cause burning damage, inner bag high temperature may damage the parts of other circuit control simultaneously; 2) when the electric-heating thermos lack of water, warning circuit normally indicates lamp to report to the police, and when the people is not near electric-heating thermos, can't see the situation of pilot lamp, so the warning effect is not number; 3) temperature controller of general vacuum flask is to be connected on the loop of heater strip to boil water, and just outage when temperature reaches is high if the break-off signal of temperature controller has been got like this, can cause water to hold and not jump.Resolutely open temperature and get lowly, water does not open also just that the electricity went off, causes and drinks unboiled water.Now vacuum flask is on the market held the phenomenon of not jumping in order not cause water, just the break-off signal point is got lowly, and just the electricity went off for the bubbling just of the water of vacuum flask.

3, summary of the invention:

The purpose of this utility model provides a kind of control circuit of electric-heating thermos, it is by being provided with high temperature measurement sensor and controlled switch, in the time of can preventing the electric-heating thermos lack of water, insulation heater strip and heater strip to boil water still work on, and cause the inner bag of electric-heating thermos partly to produce dry combustion method high temperature.

Further purpose of the present utility model provides a kind of control circuit of electric-heating thermos, and it is provided with the delay control circuit that seethes with excitement again, when heater strip temperature controller to boil water is disconnected, also continues 1 minute to boil water half to 2 minute, and is boiled fully water.

The 3rd purpose of the present utility model provides a kind of control circuit of electric-heating thermos, and it strengthens the warning effect by pilot lamp and audible alarm circuit are set.

The utility model is achieved by the following technical solution: it comprises heating work circuit, working indicating, main control circuit and transformation rectification circuit, it also comprises high temperature measurement sensor and controlled switch in addition, between civil power and heating work circuit, controlled switch is set, the high temperature measurement sensor is installed in electric-heating thermos inner bag bottom, the output terminal of high temperature measurement sensor connects the input end of main control circuit, and the output terminal of main control circuit connects the control end of controlled switch.

Above-mentioned described main control circuit comprises the delay control circuit that seethes with excitement again, and the output terminal of the delay control circuit that seethes with excitement again connects the control end of gauge tap, and the heating wire to boil water in gauge tap and the heating work circuit is cascaded.

Above-mentioned described main control circuit also comprises pilot lamp and audible alarm circuit.

The utility model compared with prior art has following advantage: when the electric-heating thermos lack of water, the high temperature measurement sensor is sent to main control circuit with the signal that detects, main control circuit cuts off heater strip power supply to boil water by controlled switch, avoids the inner bag of electric-heating thermos partly to produce dry combustion method high temperature; 2) when the electric-heating thermos lack of water, pilot lamp and audible alarm circuit are reported to the police except pilot lamp and are also had audible alarm, even the people not near electric-heating thermos the time, also can hear alarm sound, enhancing warning effect; 3) delay control circuit that seethes with excitement again is set, arrives one regularly, just disconnect when temperature controller measurements measures water temperature, 1 clock～2 minute but heater strip to boil water is still worked under the control of the delay control circuit that seethes with excitement again, boiled fully water, it is more reliable therefore to work.

4, description of drawings:

Below in conjunction with accompanying drawing the utility model is done detailed explanation:

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is the circuit diagram of Fig. 1 correspondence.

5, embodiment:

As shown in Figure 1 and Figure 2, the utility model comprises heating work circuit 1, working indicating 2, main control circuit 3 and transformation rectification circuit 4, it also comprises high temperature measurement sensor 5 and controlled switch 6 in addition, between civil power and heating work circuit 1, controlled switch 6 is set, high temperature measurement sensor 5 is installed in electric-heating thermos inner bag bottom, the output terminal of high temperature measurement sensor 5 connects the input end of main control circuit 3, and the output terminal of main control circuit 3 connects the control end of controlled switch 6.Main control circuit 3 comprises the delay control circuit 7 that seethes with excitement again, the output terminal of delay control circuit 7 of seething with excitement again connects the control end of gauge tap 8, heating wire to boil water 9 in gauge tap 8 and the heating work circuit 1 is cascaded, and main control circuit 3 also comprises pilot lamp and audible alarm circuit 10.

Heating work circuit 1 comprises heating wire BOIL to boil water, insulation heating wire KEEP and relay switch J1-1; Working indicating 2 comprises resistance R 1, resistance R 2, diode D1, diode D2; Under the normal condition, high temperature measurement sensor 5 adopts 110 ℃ of temperature controller TEM2 to be in closure state, triode Q2 obtains forward bias and conducting, relay J 2 energising work, connect the power supply of heating work circuit 1, so the triode of triode Q6 conducting simultaneously Q5 ends, triode Q3, triode D5 and hummer SPEAKER do not work.When the empty burning of lack of water, temperature controller TEM2 detected temperatures surpasses 110 ℃, and temperature controller TEM2 disconnects, and triode Q2 ends, and triode Q6 ends, and relay J 2 disconnects, 1 outage of heating work circuit.Because triode Q6 ends, triode Q5 conducting, diode D5 lights, hummer SPEAKER buzzing, triode Q3 conducting simultaneously.Because triode Q3 conducting, when temperature controller TEM2 resets, triode Q2 can not conducting, and must click " ann reset " K switch 4 triode Q4 could conducting, when the user adds water, might press " ann reset " button at once, at this moment might also not reset by temperature controller TEM2, triode Q2 conducting immediately, can cause the user to misunderstand can not reset, add after resistance R 4 and C4 form delay circuit, exactly for compensation temperature controller TEM2 required time that resets.Still make triode Q4 conducting a period of time after K switch 4 disconnects, make when relay J 2 maintenance energising work, simultaneously, triode Q6 conducting, triode Q5 ends, and diode D5 extinguishes, and hummer SPEAKER does not work, and triode Q3 ends simultaneously.

The delay control circuit 7 of seething with excitement is again realized time-delay function to boil water, and the temperature controller of general vacuum flask is to be connected on the loop of heater strip to boil water just outage when temperature reaches.Like this, high if the break-off signal of temperature controller is got, can cause water to hold and not jump.If break-off signal is got low, water is not also opened with regard to the electricity went off, causes and drinks unboiled water.Now vacuum flask is on the market held the phenomenon of not jumping in order not cause water, just the break-off signal point is got lowly, and just the electricity went off for the bubbling just of the water of vacuum flask.This circuit when temperature controller disconnects, also continues 1 minute to boil water half to 2 minute with regard to having solved this problem, and is boiled fully water.Promptly form delay circuit by capacitor C 2 and resistance R 7.After temperature controller TEM1 measures preset temperature, disconnect, but heating wire to boil water 9 still worked 1 minute half to 2 minute, boiled fully water.

As shown in Figure 2, K switch 2 is used to control motor M and realizes electronic water outlet, and K switch 3 is used to control motor M and realizes manual water outlet, and K switch 1 is used for starting the delay control circuit 7 that seethes with excitement again, K switch 4 is used for heating work circuit 1 resetting after outage, makes it restart work.

Claims

1, a kind of control circuit of electric-heating thermos, comprise heating work circuit (1), working indicating (2), main control circuit (3) and transformation rectification circuit (4), it is characterized in that it also comprises high temperature measurement sensor (5) and controlled switch (6), between civil power and heating work circuit (1), controlled switch (6) is set, high temperature measurement sensor (5) is installed in electric-heating thermos inner bag bottom, the output terminal of high temperature measurement sensor (5) connects the input end of main control circuit (3), and the output terminal of main control circuit (3) connects the control end of controlled switch (6).

2, the control circuit of a kind of electric-heating thermos according to claim 1, it is characterized in that main control circuit (3) comprises the delay control circuit that seethes with excitement again (7), the output terminal of delay control circuit (7) of seething with excitement again connects the control end of gauge tap (8), and gauge tap (8) is cascaded with heating wire to boil water (9) in the heating work circuit (1).

3, the control circuit of a kind of electric-heating thermos according to claim 1 and 2 is characterized in that main control circuit (3) also comprises pilot lamp and audible alarm circuit (10).