CN209858096U - Oven temperature monitoring system - Google Patents
Oven temperature monitoring system Download PDFInfo
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- CN209858096U CN209858096U CN201720436934.9U CN201720436934U CN209858096U CN 209858096 U CN209858096 U CN 209858096U CN 201720436934 U CN201720436934 U CN 201720436934U CN 209858096 U CN209858096 U CN 209858096U
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Abstract
The utility model discloses an oven temperature monitoring system, which solves the problem of potential safety hazard in the process of cleaning an oven after baking is finished, and provides the following technical proposal, which comprises a temperature detection device arranged on an oven wall and used for detecting the temperature of the oven wall so as to output a corresponding temperature detection signal, a ten-level voltage comparator circuit electrically connected with the temperature detection device and used for comparing the temperature detection signal with a ten-level temperature reference signal so as to output a ten-level comparison signal, and an oven wall display device electrically connected with the ten-level voltage comparator circuit and responding to the ten-level comparison signal so as to give out light to prompt the temperature, wherein the ten-level voltage comparator circuit is also electrically connected with a switch circuit which responds to the detection stop signal for disconnection, the switch circuit is connected in series in a power supply circuit of the temperature detection device, the display device responds to the ten-level comparison signal so as to give out light to prompt the temperature, make things convenient for people to know, self-closing detects when the temperature is lower, helps avoiding long-time continuous detection extravagant electric energy.
Description
Technical Field
The utility model relates to an oven, more specifically say, it relates to an oven temperature monitoring system.
Background
An oven is a sealed electric appliance for baking food or drying products, and is classified into a home electric appliance and an industrial oven. The household oven can be used for processing certain wheaten foods, such as bread and pizza, and can also be used for making snacks such as egg tarts and cookies, and the household oven can be used for baking chicken, so that the made food has a strong fragrance. An industrial oven is a device used for drying products in industry, and is an electric oven and a gas oven, which are also called as an oven, a drying box and the like.
The oven can be cleaned after the use is finished, the oven provided with the oven temperature display instrument is also arranged on the market, the instrument generally displays the temperature in the oven only when the oven works, but the instrument stops displaying the temperature in the oven after the oven works, the temperature after the oven stops working cannot be prompted, if the oven is cleaned when the oven is not cooled, the situation that a person is scalded by the oven wall of the oven can occur, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an oven temperature monitoring system has the advantage that whether the temperature suitable abluent in the oven is known to the person of facilitating the use.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the oven temperature monitoring system comprises a temperature detection device, a ten-level voltage comparator circuit and a display device, wherein the temperature detection device is arranged on an oven wall and used for detecting the temperature of the oven wall so as to output a corresponding temperature detection signal, the ten-level voltage comparator circuit is electrically connected with the temperature detection device and used for comparing the temperature detection signal with a ten-level temperature reference signal so as to output a ten-level comparison signal, the display device is electrically connected with the ten-level voltage comparator circuit and responds to the ten-level comparison signal so as to give out light to prompt the temperature, the ten-level comparison signal comprises a detection stop signal, the ten-level voltage comparator circuit is also electrically connected with a switch circuit which responds to the detection stop signal for disconnection, and the switch circuit is connected in series in a power supply circuit of.
Adopt above-mentioned technical scheme, temperature-detecting device sets up on the oven, the temperature detected signal that the output corresponds after the detection temperature, ten grades of voltage comparator comparison temperature detected signal and ten grades of temperature reference signal's size is with output ten grades of comparison signals, display device responds to ten grades of comparison signal and gives out the demonstration with oven temperature height, make things convenient for people to know the height of temperature oven temperature, ten grades of comparison signals are including detecting stop signal, switching circuit responds to and detects the stop signal disconnection in order to stop for the temperature-detecting device power supply, thereby self-closing detects when the temperature is lower, help avoiding long-time continuous detection extravagant electric energy.
Preferably, the temperature detecting device comprises a detecting circuit for detecting the temperature of the furnace wall to output a detection signal with a corresponding magnitude, an amplifying circuit electrically connected with the detecting circuit to amplify the detection signal, and a filtering circuit electrically connected with the amplifying circuit to filter an interference signal in the detection signal to output the temperature detection signal.
By adopting the technical scheme, the detection circuit detects the temperature of the furnace wall, outputs the detection signal corresponding to the temperature, the amplifying circuit amplifies the detection signal, the filtering effect of the filtering circuit is combined to realize the amplified output with larger times and accuracy, and the signal is amplified to ensure that the accuracy of temperature detection is high and the error is small.
Preferably, the detection circuit is a wheatstone bridge circuit composed of thermistors.
Preferably, the amplifying circuit is a differential amplifier circuit.
By adopting the technical scheme, the Wheatstone bridge circuit is accurate in detection and is particularly sensitive to tiny temperature change, and in addition, the amplifying circuit further amplifies the detection signal of the bridge circuit, so that the detection is more accurate.
Preferably, the amplifying circuit is electrically connected to a zero adjustment unit for stabilizing an output in a zero input state.
By adopting the technical scheme, the amplification factor of the amplifying circuit is very large, generally more than one hundred thousand times, even in a zero input state, the tiny input voltage still has very large output signals after being amplified possibly due to voltage or signals of interference signals, so that the detection accuracy is influenced, and after the amplifying circuit is connected to the zero adjusting part, the output in the zero input state can be stabilized, so that the detection accuracy is further enhanced.
Preferably, the ten-level voltage comparator circuit is electrically connected with a reference circuit for providing a ten-level temperature reference signal.
By adopting the technical scheme, the reference circuit is used for providing the size of the ten-level temperature reference signal, so that people can conveniently set the reference signal according to actual needs.
Preferably, the display device is a plurality of LED luminous tubes.
By adopting the technical scheme, the temperature is prompted through the LED, the cost is lower, and the temperature can be known only through light, so that the temperature is convenient.
Preferably, the ten-level comparison signal further comprises a high-temperature signal, the ten-level voltage comparator circuit is further electrically connected with a switch device and a warning device controlled by the switch device, and the switch device is triggered and conducted to supply power to the warning device to warn when responding to the high-temperature signal and the opening of the oven door.
Adopt above-mentioned technical scheme, ten grades of comparison signals are including representing the high temperature signal of high temperature, when switching device received high temperature signal, if oven door was opened this moment, then switching device triggered when responding to high temperature signal and oven door and switches on, and then warns for the power supply of warning device, and the oven wall temperature was too high this moment of reminding people, washs danger, has improved the security that the oven used.
Preferably, the switching means comprises a triode switch circuit.
Preferably, the warning device is a buzzer.
By adopting the technical scheme, the buzzer is controlled to sound through the triode switch circuit, the circuit structure is simple, the cost is low, and the sound reminding mode is direct and has good reminding effect.
To sum up, the utility model discloses following beneficial effect has:
1. the display device responds to the ten-level comparison signal to emit light to display the temperature of the furnace wall, so that people can know the temperature of the furnace wall conveniently, the situation that people wash the furnace wall to be scalded under the condition that the temperature of the furnace wall is unknown is avoided, and the safety is higher;
2. the switch circuit is disconnected in response to the detection stop signal to stop supplying power to the temperature detection device, so that the detection is automatically closed when the temperature is low, the waste of electric energy caused by the fact that the temperature detection device is started for a long time for detection is avoided, and more energy is saved;
3. the detection circuit detects the temperature of the furnace wall and outputs a detection signal corresponding to the temperature, the amplification circuit amplifies the detection signal, the filtering action of the filter circuit is combined to realize the amplification output with larger times and accuracy, the signal is amplified to ensure that the accuracy of temperature detection is higher, the error is smaller, the Wheatstone bridge circuit is accurate in detection and is particularly more sensitive to tiny temperature change, and in addition, the amplification circuit further amplifies the detection signal of the bridge circuit to ensure that the detection is more accurate;
4. the ten-level comparison signal comprises a high-temperature signal representing overhigh temperature, when the switch device receives the high-temperature signal, if the oven door is opened at the moment, the switch device responds to the high-temperature signal and triggers the oven door to be switched on when being opened, and then the warning device is powered to warn, so that the oven wall temperature of people is reminded to be overhigh, the cleaning danger is realized, and the use safety of the oven is improved.
Drawings
FIG. 1 is a schematic block diagram of a temperature monitoring system of a middle oven according to the present invention;
fig. 2 is a schematic circuit diagram of the temperature monitoring system of the middle oven of the present invention.
In the figure: 1. a temperature detection device; 11. a detection circuit; 12. an amplifying circuit; 121. a zero setting part; 13. a filter circuit; 2. a display device; 3. a ten-stage voltage comparator circuit; 31. a reference circuit; 4. a switching circuit; 5. a switching device; 6. an alarm device.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and embodiments.
An oven temperature monitoring system, referring to fig. 1, comprises a temperature detection device 1 arranged on an oven wall for detecting the temperature of the oven wall so as to output a corresponding temperature detection signal, a ten-level voltage comparator circuit 3 electrically connected with the temperature detection device 1 and used for comparing the temperature detection signal with a ten-level temperature reference signal so as to output a ten-level comparison signal, and a display device 2 electrically connected with the ten-level voltage comparator circuit 3 and responding to the ten-level comparison signal so as to give out light to prompt the temperature, wherein the ten-level comparison signal comprises a detection stop signal, the ten-level voltage comparator circuit 3 is also electrically connected with a switch circuit 4 which is disconnected in response to the detection stop signal, and the switch circuit 4 is connected in series in a power supply circuit of the temperature detection device 1 for controlling the operation of the temperature detection device 1.
Referring to fig. 1 and 2, the temperature detecting device 1 includes a detecting circuit 11 for detecting the temperature of the furnace wall to output a detecting signal with a corresponding magnitude, an amplifying circuit 12 electrically connected to the detecting circuit 11 for amplifying the detecting signal, and a filter circuit 13 electrically connected to the amplifying circuit 12 for filtering an interference signal in the detecting signal to output a temperature detecting signal.
In this embodiment, the detection circuit 11 adopts a wheatstone bridge circuit composed of thermistors, the amplification circuit 12 adopts an amplification circuit 12 composed of an operational amplifier, the filter circuit 13 adopts RC filtering, and the specific circuit connection is as follows:
the detection circuit 11 comprises a thermistor RT1, a thermistor RT2, a thermistor RT3, a thermistor RT4, a resistor R1, a resistor R2 and a resistor R3, wherein the thermistor RT1, the thermistor RT2, the thermistor RT3 and the thermistor RT4 are sequentially connected end to end in series to form a coil, a connection point between the thermistor RT1 and the thermistor RT3 is coupled to a power VCC, a connection point between the thermistor RT2 and the thermistor RT4 is grounded, a connection point between the thermistor RT1 and the thermistor RT2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected in series with a resistor R3 and then grounded, a connection point between the thermistor RT3 and the thermistor RT4 is connected to one end of the resistor R2, and the other end of the resistor R1 and the other end of the resistor R2 are used for outputting detection signals.
The amplifying circuit 12 includes an operational amplifier U1, a resistor R4, and a sliding rheostat RW, the sliding rheostat RW forms a zero adjustment portion 121 for stabilizing the output of the amplifying circuit 12 in a zero input state, in this embodiment, the operational amplifier U1 is an operational amplifier OP01, a pin 3 of a non-inverting input terminal of the OP01 is connected to the resistor R1 and a pin 2 of an inverting input terminal of the OP01 is connected to the resistor R2 to receive a detection signal, a pin 7 of the OP01 is connected to the power VCC, a pin 7 of the OP01 is connected to a moving terminal of the sliding rheostat RW, pins 1 and 8 of the OP01 are respectively connected to two fixed terminals of the sliding rheostat RW, a pin 4 of the OP01 is grounded, a pin 6 of the OP01 is connected in series with a resistor R10 and then connected to a pin 2 of the OP.
The filter circuit 13 includes a resistor R5 and a capacitor C1, wherein one end of the resistor R5 is connected to the 6 pin of the OP01, the other end of the resistor R5 is connected in series with the capacitor C1 and then grounded, and the other end of the resistor R5 outputs the final temperature detection signal.
Referring to fig. 2, the ten-level voltage comparator circuit 3 is electrically connected to a reference circuit 31 for providing a ten-level temperature reference signal, and the specific connections of the ten-level voltage comparator circuit 3, the reference circuit 31 and the switch circuit 4 are as follows:
the ten-level voltage comparator circuit 3 comprises a chip IC-3, a capacitor C7, a reference circuit 31 comprises a resistor R9 and a resistor R10, the display device 2 comprises five LED light-emitting tubes, wherein the chip IC03 is LM3914, the LM3941 has 18 pins in total from 1 to 18, 5 pins of the LM3941 are connected with the resistor R5 to receive temperature detection signals, 2 and 4 pins of the LM3941 are grounded, 3 and 9 pins of the LM3941 are connected with a power supply, 3 pins of the LM3941 are connected with the anode of an electrolytic capacitor C7, the cathode of the electrolytic capacitor C7 is connected with 4 pins of the LM3941, 6 and 7 pins of the LM3941 are grounded after being connected with a series resistor R10, 8 pins of the LM3941 are connected with a series resistor R9 and then connected with a 7 pin of the LM3941, 1 pin, 18 to 10 pins of the LM3941 are used for outputting ten-level comparison signals, 1 pin, 18 pin, 17 pin, 16 pin and 15 pin of the LM3941 are respectively connected with the cathode of an LED anode, VCC of the LED is, wherein the ten-stage comparison signal output from the 18 pin of LM3941 is the detection stop signal.
Referring to fig. 2, in the present embodiment, the switch circuit 4 includes an NPN-type transistor VT2, a base of the transistor VT2 is connected to the 18 pin of the LM3914 to receive the detection stop signal, a collector of the transistor VT2 is connected to the power supply VCC, and an emitter of the transistor VT2 is connected to a node between the thermistor RT1 and the thermistor RT 4.
Referring to fig. 1 and 2, the ten-stage voltage comparator circuit 3 is further electrically connected with a switch device 5 and a warning device 6 controlled by the switch device 5, the ten-stage comparison signal further includes a high temperature signal, the switch device 5 is triggered and conducted to supply power to the warning device 6 for warning when responding to the high temperature signal and the oven door is opened, the switch device 5 is a triode switch circuit 4, and the warning device 6 is a buzzer.
The switch device 5 comprises a PNP type triode VT1, a resistor R7, a resistor R8, a microswitch K, a diode D2, a diode D3 and a diode D4, the warning device 6 comprises a buzzer SP and a diode D5, wherein the base of the triode VT1 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with the anodes of the diodes D2, D3 and D4, the cathodes of the diodes D2, D3 and D4 are respectively connected with pins 15, 16 and 17 of the LM3941, the other end of the resistor R8 is connected with a resistor R7 in series and then connected with a power supply VCC, the emitter of the triode VT1 is connected with the microswitch K in series and then connected with the power supply VCC, the microswitch is arranged on the oven door, the microswitch K is turned off to be closed when the oven door is opened, the collector of the triode VT1 is connected with the buzzer SP in series and then grounded, and two ends of the.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an oven temperature monitoring system which characterized by: the temperature detection device comprises a temperature detection device (1) which is arranged on a furnace wall and used for detecting the temperature of the furnace wall so as to output a corresponding temperature detection signal, a ten-level voltage comparator circuit (3) which is electrically connected with the temperature detection device (1) and used for comparing the temperature detection signal with a ten-level temperature reference signal so as to output a ten-level comparison signal, and a display device (2) which is electrically connected with the ten-level voltage comparator circuit (3) and responds to the ten-level comparison signal so as to give out light to prompt the temperature, wherein the ten-level comparison signal comprises a detection stop signal, the ten-level voltage comparator circuit (3) is also electrically connected with a switch circuit (4) which responds to the detection stop signal for disconnection, and the switch circuit (4) is connected in series in a power supply circuit of the temperature detection device (1); the switch circuit (4) comprises an NPN type triode VT2, the base electrode of the triode VT2 is connected with the ten-stage voltage comparator circuit (3) to receive the detection stop signal, the collector electrode of the triode VT2 is connected with the power supply VCC, and the emitter electrode of the triode VT2 is connected with the temperature detection device (1);
the switch circuit (4) comprises an NPN type triode VT2, the base electrode of the triode VT2 is connected with the 18 pin of the LM3914 to receive the detection stop signal, the collector electrode of the triode VT2 is connected with a power supply VCC, and the emitter electrode of the triode VT2 is connected with a node between the thermistor RT1 and the thermistor RT 4.
2. The oven temperature monitoring system of claim 1, wherein: the temperature detection device (1) comprises a detection circuit (11) for detecting the temperature of the furnace wall so as to output a detection signal with a corresponding magnitude, an amplification circuit (12) which is electrically connected with the detection circuit (11) and used for amplifying the detection signal, and a filter circuit (13) which is electrically connected with the amplification circuit (12) and used for filtering an interference signal in the detection signal so as to output the temperature detection signal.
3. The oven temperature monitoring system of claim 2, wherein: the detection circuit (11) is a Wheatstone bridge circuit composed of thermistors.
4. The oven temperature monitoring system of claim 3, wherein: the amplifying circuit (12) is a differential amplifier circuit.
5. The oven temperature monitoring system of claim 4, wherein: the amplifying circuit (12) is electrically connected with a zero setting part (121) for stabilizing output under a zero input state.
6. The oven temperature monitoring system of claim 1, wherein: the ten-level voltage comparator circuit (3) is electrically connected with a reference circuit (31) for providing a ten-level temperature reference signal.
7. The oven temperature monitoring system of claim 1, wherein: the display device (2) is a plurality of LED luminous tubes.
8. The oven temperature monitoring system of claim 1, wherein: ten grades of comparison signals still include the high temperature signal, ten grades of voltage comparator circuit (3) still electric connection have switching device (5) and be controlled by the warning device (6) of switching device (5), switching device (5) are triggered when responding to high temperature signal and oven door and are switched on in order to warn for warning device (6) power supply.
9. The oven temperature monitoring system of claim 8, wherein: the switching device (5) comprises a triode switching circuit (4).
10. The oven temperature monitoring system of claim 8, wherein: the warning device (6) is a buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436934.9U CN209858096U (en) | 2017-04-24 | 2017-04-24 | Oven temperature monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436934.9U CN209858096U (en) | 2017-04-24 | 2017-04-24 | Oven temperature monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN209858096U true CN209858096U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720436934.9U Expired - Fee Related CN209858096U (en) | 2017-04-24 | 2017-04-24 | Oven temperature monitoring system |
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| CN (1) | CN209858096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865739A (en) * | 2021-08-30 | 2021-12-31 | 苏州浪潮智能科技有限公司 | Temperature detection device and server |
-
2017
- 2017-04-24 CN CN201720436934.9U patent/CN209858096U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865739A (en) * | 2021-08-30 | 2021-12-31 | 苏州浪潮智能科技有限公司 | Temperature detection device and server |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191227 Termination date: 20210424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |