CN204795659U - Heating rod with safety protection - Google Patents
Heating rod with safety protection Download PDFInfo
- Publication number
- CN204795659U CN204795659U CN201520411510.8U CN201520411510U CN204795659U CN 204795659 U CN204795659 U CN 204795659U CN 201520411510 U CN201520411510 U CN 201520411510U CN 204795659 U CN204795659 U CN 204795659U
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- CN
- China
- Prior art keywords
- relay
- transforming circuit
- output
- circuit
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a heating rod with safety protection, including power cord, bottle plug, safety circuit and heating pipe, the power cord is fixed on bottle plug upper portion, and the heating pipe is fixed in the bottle plug lower part, and safety circuit sets up in the bottle plug, safety circuit includes relay, first vary voltage circuit, second vary voltage circuit and thermistor, and the output common port and the one end of power cord of relay are connected, and the normal close output of relay is connected with an input of first vary voltage circuit and the one end of heating pipe, and the output of normally opening of relay is connected with an input of second vary voltage circuit. The utility model discloses can be when thermistor detect high temperature, the circuit of disconnection heating pipe to keep the state of outage, be connected once more with the commercial power disconnection up to the circuit and just continue the circular telegram, guarantee the safety of heating rod.
Description
Technical field
The utility model relates to firing equipment protection field, particularly relates to a kind of heating rod with safeguard protection.
Background technology
Existing heating rod does not stop heating after water is boiled, be easy to dryout water after user forgets power-off after, and the potential safety hazards such as initiation fire.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of heating rod with safeguard protection, solves the problem that heating rod has potential safety hazard.
The utility model is achieved in that a kind of heating rod with safeguard protection, comprises power line, bottle stopper, safety circuit and heating tube, and power line is fixed on bottle stopper top, and heating tube is fixed on bottle stopper bottom, and safety circuit is arranged in bottle stopper;
Safety circuit comprises relay, first transforming circuit, second transforming circuit and thermistor, the output common port of relay is connected with one end of power line, the normally closed output of relay is connected with one end of an input of the first transforming circuit and heating tube, the output of often opening of relay is connected with an input of the second transforming circuit, another input of first transforming circuit is connected with another input of the second transforming circuit, the other end of heating tube is connected with the other end of power line, the output cathode of the first transforming circuit and the power positive end of comparable chip, one end of first resistance is connected with one end of the second resistance, the output cathode of the second transforming circuit is connected with an input of the negative pole of diode and relay, the positive pole of diode is connected with the output of comparable chip, the other end of the first resistance is connected with the in-phase input end of one end of thermistor and comparable chip, the other end of the second resistance is connected with one end of the inverting input of comparable chip and the 3rd resistance, the output negative pole of the first transforming circuit, the output negative pole of the second transforming circuit, the power supply negative terminal of comparable chip, the other end of thermistor, the other end of the 3rd resistance and another input end grounding of relay, the resistance of thermistor rises with temperature and raises, first transforming circuit is identical with the output voltage of the second transforming circuit, thermistor is arranged on bottle stopper lower surface.
The utility model tool has the following advantages: when thermistor detects high temperature, can disconnect the circuit of heating tube, and keep the state of power-off, just can continue to be energized until circuit and civil power disconnect and be again connected, ensure safety.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit diagram of safety circuit of the present utility model.
Embodiment
By describing technology contents of the present utility model, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
Refer to Fig. 1 and Fig. 2; the utility model provides a kind of heating rod with safeguard protection, and comprise power line 1, bottle stopper 2, safety circuit (Fig. 1 is not shown) and heating tube 3, power line is fixed on bottle stopper top; heating tube is fixed on bottle stopper bottom, and safety circuit is arranged in bottle stopper.
As shown in Figure 2, safety circuit comprises relay LS1, first transforming circuit (transforming circuit 1 in Fig. 2), second transforming circuit (transforming circuit 2 in Fig. 2) and thermistor RD1, the output common port of relay is connected with one end of power line, the normally closed output of relay is connected with one end of an input of the first transforming circuit and heating tube, the output of often opening of relay is connected with an input of the second transforming circuit, another input of first transforming circuit is connected with another input of the second transforming circuit, the other end of heating tube L1 is connected with the other end of power line, the output cathode of the first transforming circuit and the power positive end of comparable chip U1, one end of first resistance R1 is connected with one end of the second resistance R2, the output cathode of the second transforming circuit is connected with an input of the negative pole of diode D1 and relay, the positive pole of diode is connected with the output of comparable chip, the other end of the first resistance is connected with the in-phase input end of one end of thermistor and comparable chip, the other end of the second resistance is connected with one end of the inverting input of comparable chip and the 3rd resistance R3, the output negative pole of the first transforming circuit, the output negative pole of the second transforming circuit, the power supply negative terminal of comparable chip, the other end of thermistor, the other end of the 3rd resistance and another input end grounding of relay, the resistance of thermistor rises with temperature and raises, first transforming circuit is identical with the output voltage of the second transforming circuit, thermistor 4 is arranged on bottle stopper 2 lower surface.
Wherein, relay is five pin relays, and under input no power state, the output common port of relay is connected with output normal-closed end, and under the state of input energising, the output common port of relay can be connected with output Chang Kaiduan.According to the voltage of different input, common model has varied, as the JQC-3F etc. of the SRD-12VDC-SL-C of 12V, 5V.Transforming circuit for realizing the transformation of voltage, thus produces direct voltage.If namely common charger for mobile phone is the AC-DC transforming circuit that 5V exports.Heating tube realizes the heating to object.
In use, civil power exports above 220V alternating current to circuit the utility model.Now relay output common port with export Chang Kaiduan and be interconnected, transforming circuit 1 is electrically connected with city, and transforming circuit connects output dc voltage after civil power.Heating tube is electrically connected with city, and namely heating tube normally works.If the temperature that thermistor detects is lower, then the resistance of thermistor is lower, and the voltage on thermistor is lower, and lower than the voltage above the 3rd resistance, comparable chip does not export, and relay keeps this state, the state of heating tube maintenance work.When the temperature that thermistor detects is too high, the resistance of thermistor is excessive, makes the voltage on thermistor be greater than the voltage of the 3rd resistance, comparable chip output output voltage, voltage leads to the input of relay through diode, makes relay input obtain electric and start adhesive.After adhesive, the output common port of relay with often open output and be connected, make transforming circuit 1 disconnect the connection with power line, and transforming circuit 2 connects upper civil power, now the output voltage of transforming circuit is directly connected to the input of relay.The energising of latching relay, makes relay to remain on always and exports the state that is connected with Chang Kai output of common port, thus be disconnected the connection of civil power and heating tube, heating tube is no longer heated.Transforming circuit 1 loses voltage simultaneously, and temperature detection below lost efficacy, even if temperature declines, also can not affect the work of relay, namely relay still can keep the state that civil power and heating tube disconnect.And when needs heat again, only need the 220V power supply of deenergization line, then once heat on the power supply connecting power line can carry out.Reach once temperature is too high will the effect of Self-disconnecting, ensure safety.This Self-disconnecting can recover by reconnecting upper mains supply again, simple and convenient.
It should be noted that, the output of transforming circuit has electric capacity to carry out filtering substantially, and the electric capacity of transforming circuit 1 can maintain the off-state of relay when relay disconnects, until the circuit of transforming circuit 2 obtains electric and exports.
The foregoing is only embodiment of the present utility model; not thereby scope of patent protection of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (1)
1. have a heating rod for safeguard protection, it is characterized in that: power line, bottle stopper, safety circuit and heating tube, power line is fixed on bottle stopper top, and heating tube is fixed on bottle stopper bottom, and safety circuit is arranged in bottle stopper;
Safety circuit comprises relay, first transforming circuit, second transforming circuit and thermistor, the output common port of relay is connected with one end of power line, the normally closed output of relay is connected with one end of an input of the first transforming circuit and heating tube, the output of often opening of relay is connected with an input of the second transforming circuit, another input of first transforming circuit is connected with another input of the second transforming circuit, the other end of heating tube is connected with the other end of power line, the output cathode of the first transforming circuit and the power positive end of comparable chip, one end of first resistance is connected with one end of the second resistance, the output cathode of the second transforming circuit is connected with an input of the negative pole of diode and relay, the positive pole of diode is connected with the output of comparable chip, the other end of the first resistance is connected with the in-phase input end of one end of thermistor and comparable chip, the other end of the second resistance is connected with one end of the inverting input of comparable chip and the 3rd resistance, the output negative pole of the first transforming circuit, the output negative pole of the second transforming circuit, the power supply negative terminal of comparable chip, the other end of thermistor, the other end of the 3rd resistance and another input end grounding of relay, the resistance of thermistor rises with temperature and raises, first transforming circuit is identical with the output voltage of the second transforming circuit, thermistor is arranged on bottle stopper lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520411510.8U CN204795659U (en) | 2015-06-15 | 2015-06-15 | Heating rod with safety protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520411510.8U CN204795659U (en) | 2015-06-15 | 2015-06-15 | Heating rod with safety protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204795659U true CN204795659U (en) | 2015-11-18 |
Family
ID=54535622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520411510.8U Expired - Fee Related CN204795659U (en) | 2015-06-15 | 2015-06-15 | Heating rod with safety protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204795659U (en) |
-
2015
- 2015-06-15 CN CN201520411510.8U patent/CN204795659U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160615 |