CN203705991U - Automatic heat-preservation heating circuit - Google Patents
Automatic heat-preservation heating circuit Download PDFInfo
- Publication number
- CN203705991U CN203705991U CN201320845969.XU CN201320845969U CN203705991U CN 203705991 U CN203705991 U CN 203705991U CN 201320845969 U CN201320845969 U CN 201320845969U CN 203705991 U CN203705991 U CN 203705991U
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- CN
- China
- Prior art keywords
- triode
- heating
- thermistor
- power circuit
- circuit
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- Expired - Fee Related
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Abstract
The utility model belongs to the field of electric heating, in particular to an automatic heat-preservation heating circuit. At room temperature, resistance of a heating thermistor and a heat-preservation thermistor is large. When power is on, a triode and an amplifying triode are triggered to be stopped, a one-way silicon controlled rectifier is stopped, a two-way silicon controlled rectifier is conducted, and an electric heater is electrified to work. When the temperature reaches curie points of the heating thermistor and the heat-preservation thermistor, the resistance is reduced, the triode and the amplifying triode are triggered to be conducted, a buzzer is electrified to work, the two-way silicon controlled rectifier loses power and is stopped, and the heater is power-off. When the temperature is lower than curie points of the thermistors, the resistance is increased, the two-way silicon controlled rectifier is conducted again, and the electric heater works. Thus, the automatic heat-preservation heating circuit capable of heating automatically provided by the utility model solves the defect that heating needs to be carried out again in the case of use as heat preservation is stopped after the prior heat preservation circuit heats automatically and the temperature is reduced continuously.
Description
Technical field
The utility model belongs to field of electric heating, is specifically related to automatic heat preserving heater circuit.
Background technology
Automatic-heating warm-keeping or be to be incubated food or water in prior art, or be to be incubated, but very mechanical old-fashioned and inflexible; just food or water are reheated; after Automatic-heating, just disconnect insulation, temperature will continue to lower, and will reheat in the used time.
Utility model content
Technical problem to be solved in the utility model is after thermal circuit Automatic-heating, just to disconnect insulation, and temperature will continue to lower, the defect that will reheat in the used time, and in order to solve the problems of the technologies described above, the utility model provides following technical scheme:
Automatic heat preserving heater circuit, comprise power circuit, also comprise heating and thermal insulation control circuit and warning circuit, heating and thermal insulation control circuit comprises heating thermistor, insulation thermistor, one-way SCR, bidirectional triode thyristor, relay, amplifying triode, potentiometer, electric capacity two and well heater, insulation thermistor and electric capacity two series connection and power circuit two ends, heating thermistor and potentiometer are connected and are connected across power circuit two ends, potentiometer travelling arm is connected to amplifying triode base stage and is connected between insulation thermistor and electric capacity two, power circuit positive pole connects amplifying triode collector by hummer, amplifying triode emitter connects power circuit negative pole, the bidirectional triode thyristor control utmost point connects amplifying triode collector, power circuit positive pole connects well heater successively, bidirectional triode thyristor and power circuit negative pole, relay, one-way SCR is connected and is connected across on power circuit, warning circuit comprises hummer and trigger triode, power circuit positive pole connects trigger triode collector by hummer, trigger triode emitter connects power circuit negative pole, the one-way SCR control utmost point and trigger triode base stage are connected between heating thermistor and potentiometer.
Compared with prior art the technical program has following beneficial effect:
When this automatic heat preserving heater circuit normal temperature, heat thermistor large with insulation temperature-sensitive resistance, when after energising, trigger triode, amplifying triode all end, and make one-way SCR cut-off, and bidirectional triode thyristor conducting, electric heater energising work.When temperature reaches heating thermistor and the Curie point that is incubated thermistor, its resistance diminishes, trigger triode, the equal conducting of amplifying triode, the cut-off of bidirectional triode thyristor dead electricity, well heater power-off.When temperature is during lower than warm thermistor Curie point, its resistance increases, and bidirectional triode thyristor is conducting again, electric heater work.
Brief description of the drawings
Fig. 1 is the utility model automatic heat preserving heater circuit figure.
Embodiment
Below in conjunction with drawings and Examples, technical solutions of the utility model are further illustrated:
Comprise mono-stable timing circuit and controlled table lamp circuit, mono-stable timing circuit fixed value resistance three, fixed value resistance five, fixed value resistance one, fixed value resistance two, electric capacity, time base chip, triode one, triode two and switch, its DC power anode connects fixed value resistance one, switch, fixed value resistance two and DC power cathode, triode one base stage and emitter are connected across resistance one two ends, fixed value resistance five and electric capacity are connected across on direct supply, triode one collector connects DC power cathode by fixed value resistance three, time base chip low triggering end be connected between fixed value resistance one and switch, time base chip high-triggering end be connected between fixed value resistance five and electric capacity, controlled table lamp circuit comprises photo-coupler, bidirectional triode thyristor, AC power, diode and bedside lamp, base chip output when photo-coupler anodic bonding, photo-coupler emitter connects the bidirectional triode thyristor control utmost point, bedside lamp and bidirectional triode thyristor are connected on AC power two ends, photo-coupler collector is connected between bedside lamp and bidirectional triode thyristor, time base chip output by diode anode connecting triode two base stages
As shown in Figure 1, automatic heat preserving heater circuit, principle of work: this circuit is made up of power circuit, heating and thermal insulation control circuit, warning circuit etc.Heating and thermal insulation control circuit is by heating RT1 for thermistor, insulation temperature-sensitive resistance R T2, the compositions such as one-way SCR VS1, bidirectional triode thyristor VS2, DC relay K, amplifying triode VT2.Warning circuit is made up of trigger triode VT1, piezoelectric buzzer HA etc.
After energising, thermistor RT1, the temperature on insulation temperature-sensitive resistance R T2 is lower, and its resistance is quite large, and trigger triode VT1, amplifying triode VT2 all end, and make one-way SCR VS1 cut-off, and bidirectional triode thyristor VS2 conducting, the electric heater EH work of switching on.When water open or food become ripe after, temperature has reached thermistor RT1, the Curie point of insulation temperature-sensitive resistance R T2, its resistance diminishes, and (Curie point of supposing RT1 is 100 DEG C, the Curie point of RT2 is 65 DEG C) the first conducting one-way SCR of trigger triode VT1, amplifying triode VT2 VS1 is because of resistance four R4, the time-lag action of electric capacity one C1 and conducting.Trigger triode VT1 conducting makes warning circuit work.Amplifying triode VT2 conducting makes bidirectional triode thyristor VS2 cut-off, electric heater EH power-off.Do not work when heating object temperature drops to lower than 100 DEG C of alarm circuit, heating process finishes.VS conducting makes to be incubated that pilot lamp LED is luminous, DC relay K obtains electric (until after cutting off the electricity supply dead electricity), and relay switch K1-1 disconnects that to make to be incubated temperature-sensitive resistance R T2 inoperative.Relay switch K1-1 closure makes to be incubated temperature-sensitive resistance R T2 and works, and circuit enters people's keeping warm mode.In order to prevent contact instantaneous trip amplifying triode VT2 base bias voltage in transfer process of relay K, the electric energy that utilizes electric capacity two C2 to store makes the good conducting of amplifying triode VT2.Below the temperature of water or food is down to 65 DEG C (electrical equipment of electrical heating boiling water class can be higher) time, the resistance of insulation temperature-sensitive resistance R T2 increases, amplifying triode VT2 cut-off, bidirectional triode thyristor VS2 conducting again, the electric heater EH working copy circuit of again switching on is worked so repeatedly, with the temperature that maintains water or food 65 DEG C of left and right.
(2) components and parts are selected: this circuit elements device, without particular/special requirement, is selected by diagram model or specification.
Above-described is only preferred implementation of the present utility model; should be understood that; for a person skilled in the art; do not departing under the prerequisite of the utility model structure; can also make some distortion and improvement; these also should be considered as protection domain of the present utility model, and these can not affect effect and practical applicability that the utility model is implemented.
Claims (1)
1. automatic heat preserving heater circuit, comprise power circuit, it is characterized in that: also comprise heating and thermal insulation control circuit and warning circuit, heating and thermal insulation control circuit comprises heating thermistor, insulation thermistor, one-way SCR, bidirectional triode thyristor, relay, amplifying triode, potentiometer, electric capacity two and well heater, insulation thermistor and electric capacity two series connection and power circuit two ends, heating thermistor and potentiometer are connected and are connected across power circuit two ends, potentiometer travelling arm is connected to amplifying triode base stage and is connected between insulation thermistor and electric capacity two, power circuit positive pole connects amplifying triode collector by hummer, amplifying triode emitter connects power circuit negative pole, the bidirectional triode thyristor control utmost point connects amplifying triode collector, power circuit positive pole connects well heater successively, bidirectional triode thyristor and power circuit negative pole, relay, one-way SCR is connected and is connected across on power circuit, warning circuit comprises hummer and trigger triode, power circuit positive pole connects trigger triode collector by hummer, trigger triode emitter connects power circuit negative pole, the one-way SCR control utmost point and trigger triode base stage are connected between heating thermistor and potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320845969.XU CN203705991U (en) | 2013-12-20 | 2013-12-20 | Automatic heat-preservation heating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320845969.XU CN203705991U (en) | 2013-12-20 | 2013-12-20 | Automatic heat-preservation heating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705991U true CN203705991U (en) | 2014-07-09 |
Family
ID=51056397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320845969.XU Expired - Fee Related CN203705991U (en) | 2013-12-20 | 2013-12-20 | Automatic heat-preservation heating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888472A (en) * | 2018-09-11 | 2020-03-17 | 深圳市国王科技有限公司 | Temperature control circuit based on semiconductor technology |
-
2013
- 2013-12-20 CN CN201320845969.XU patent/CN203705991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888472A (en) * | 2018-09-11 | 2020-03-17 | 深圳市国王科技有限公司 | Temperature control circuit based on semiconductor technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20141220 |
|
| EXPY | Termination of patent right or utility model |