CN206670820U - Oven temperature monitoring system - Google Patents
Oven temperature monitoring system Download PDFInfo
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- CN206670820U CN206670820U CN201720436668.XU CN201720436668U CN206670820U CN 206670820 U CN206670820 U CN 206670820U CN 201720436668 U CN201720436668 U CN 201720436668U CN 206670820 U CN206670820 U CN 206670820U
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- temperature
- detection signal
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- detecting device
- furnace wall
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Abstract
The utility model discloses a kind of oven temperature monitoring system, baking box, which is hastily cleaned, after terminating for baking the problem of potential safety hazard be present, provide following technical scheme, furnace wall temperature height is detected with the temperature-detecting device of output temperature detection signal including being arranged on furnace wall, it is electrically connected with temperature-detecting device and prompts the display device of furnace wall temperature height in response to temperature detection signal, it is electrically connected with temperature-detecting device and C.T detection signal is less than temperature reference signal to export the comparison means of stopping detection signal and be disconnected with comparison means electric connection and in response to stopping detection signal to stop the switching device to temperature-detecting device power supply, display device shows furnace wall temperature height, it is convenient for people to know the height of temperature furnace wall temperature, so as to be cleaned in good time, it is safer；In addition, switching device control temperature-detecting device is automatically stopped detection, avoids temperature-detecting device and persistently detect waste electric energy, energy-conserving and environment-protective.
Description
Technical field
A kind of baking box is the utility model is related to, more specifically, it relates to a kind of oven temperature monitoring system.
Background technology
Baking box is a kind of electrical equipment for being used for roast food or drying product of sealing, is divided into household electrical appliance and industrial baking oven.Family
It can be used for processing some wheaten food, such as bread with baking box, Pizza, the dessert of Egg Tarts, small biscuit etc can also be made, it is roasting to go back some
Case can be with roast chicken, and the food made is generally with fragrance striking the nose.Industrial baking oven, to be industrial for drying a kind of equipment of product,
Have electricity, have gas, be called oven, drying baker etc..
Baking box can all be cleaned after the completion of use, and in the market also has the baking box for setting and showing baking temperature instrument,
This instrument normally only shows the temperature in baking box when baking box works, but instrument can then stop showing after baking box end-of-job
Show the temperature in baking box, can not prompt baking box be stopped after temperature, if carried out when baking box is uncolled to baking box clear
Wash, be then likely to occur the situation that people is scalded by the furnace wall of oven, potential safety hazard be present.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of oven temperature monitoring system,
The advantages of whether roasting the temperature inside the box suitably cleans known with convenient use person.
To achieve the above object, the utility model provides following technical scheme：
A kind of oven temperature monitoring system, including be arranged on furnace wall and examined for detecting furnace wall temperature height with output temperature
The temperature-detecting device of signal is surveyed, is electrically connected with temperature-detecting device and prompts furnace wall temperature in response to temperature detection signal
The display device of height, with temperature-detecting device be electrically connected with and for C.T detection signal be less than temperature reference signal with
Output stops the comparison means of detection signal and is electrically connected with comparison means and is disconnected in response to stopping detection signal to stop
The only switching device to temperature-detecting device power supply.
Using above-mentioned technical proposal, temperature-detecting device is arranged on furnace wall, temperature detection letter corresponding to output after detection
Number, display device shows the temperature height of furnace wall now, is convenient for people to know the height of temperature furnace wall temperature, contributes to
Avoid people from cleaning furnace wall in the case where not knowing furnace wall temperature height to be burned, it is safer；In addition, comparison means is receiving
After to temperature detection signal by temperature detection signal compared with temperature reference signal, when temperature detection signal is less than temperature base
During calibration signal, comparison means output stops detection signal, and switching device is disconnected to stop to temperature in response to stopping detection signal
Detection means is powered, and is stopped detection and display furnace wall temperature, is automatically closed, avoids temperature-detecting device and open for a long time
The waste to electric energy is detected, is more saved.
Preferably, the temperature-detecting device includes being used to detect furnace wall temperature height to export corresponding size detection signal
Detection circuit, be electrically connected with the amplifying circuit that amplifies detection signal with detection circuit and be electrically connected with amplifying circuit
To filter out in detection signal interference signal with the filter circuit of output temperature detection signal.
Using above-mentioned technical proposal, by detecting the height of electric circuit inspection furnace wall temperature, and export and the high low phase of temperature
Corresponding detection signal, amplifying circuit amplify detection signal, with reference to filter circuit filter action can realize larger multiple,
Accurate amplification output, the amplified high definition made to temperature detection of signal, error diminish.
Preferably, the detection circuit is Huygens's bridge circuit of thermistor composition.
Preferably, the amplifying circuit is differential amplifier circuit.
Using above-mentioned technical proposal, the detection of Huygens's bridge circuit is accurate, especially more sensitive to small temperature change,
Other differential amplifier circuit further amplifies the detection signal of bridge circuit so that detection is more accurate.
Preferably, the differential amplifier circuit is electrically connected with for stablizing the zeroing portion exported under zero input state.
Using above-mentioned technical proposal, because the multiplication factor of amplifying circuit is very big, generally more than 100,000 times, even in zero
Input state, still have after may being exaggerated due to voltage or the signal of interference signal, small input voltage very big
Output signal, the accurate of detection is influenceed, and after accessing zeroing portion, output during zero input state can be stablized, further enhanced
The accuracy of detection.
Preferably, the comparison means includes being less than temperature reference signal for C.T detection signal to export stopping
The voltage comparator circuit of detection signal, the reference circuit for providing and adjusting temperature reference signal magnitude.
Using above-mentioned technical proposal, the strong antijamming capability of voltage comparator circuit, working stability when being compared, benchmark
Circuit may be used to provide temperature reference signal, and temperature reference signal is corresponding with the normal temperature for stopping detection, when reality
Temperature stops detection when being less than normal temperature, and reference circuit can adjust the size of temperature reference signal, support according to reality
Needs i.e. be adjusted.
Preferably, the switching device include with comparison means be electrically connected with and in response to stop detection signal turning on three
Pole pipe on-off circuit and it is controlled by the conducting of transistor switching circuit to stop the relay switch electricity to detection circuit power supply
Road.
Using above-mentioned technical proposal, transistor switching circuit supports the work with the high-power electric current of low power current control
Make, the security for contributing to enhancing to control, relay switching circuit response is rapid, meets and uses needs.
Preferably, the display device is voltmeter.
Using above-mentioned technical proposal, voltmeter is cheap, intuitively can show electric signal, is convenient for people to see
Examine, more intuitively know the height of furnace wall temperature.
In summary, the utility model has the advantages that：
1. display device shows the temperature height of furnace wall now, it is convenient for people to know the height of temperature furnace wall temperature
It is low, help avoid people and clean furnace wall in the case where not knowing furnace wall temperature height being burned, it is safer；
2. comparison means after receiving temperature detection signal by temperature detection signal compared with temperature reference signal,
When temperature detection signal is less than temperature reference signal, comparison means output stops detection signal, and switching device is in response to stopping
Detection signal is disconnected to stop powering to temperature-detecting device, is stopped detection and display furnace wall temperature, is automatically closed, avoid
Temperature-detecting device opens the waste detected to electric energy for a long time, more saves；
3. detecting the height of electric circuit inspection furnace wall temperature, and export the detection signal corresponding with temperature height, amplification
Circuit amplifies detection signal, and larger multiple, accurate amplification output, signal can be realized with reference to the filter action of filter circuit
The amplified high definition made to temperature detection, error diminish, and the detection of Huygens's bridge circuit is accurate, especially to small temperature
Degree change is more sensitive, and differential amplifier circuit further amplifies the detection signal of bridge circuit in addition so that detection is more accurate.
Brief description of the drawings
Fig. 1 is the theory diagram of oven temperature monitoring system in the utility model；
Fig. 2 is the circuit theory diagrams of oven temperature monitoring system in the utility model.
In figure：1st, temperature-detecting device；11st, circuit is detected；12nd, amplifying circuit；121st, zeroing portion；13rd, filter circuit；2、
Display device；3rd, comparison means；31st, voltage comparator circuit；32nd, reference circuit；4th, switching device；41st, triode switch electricity
Road；42nd, relay switching circuit.
Embodiment
Below in conjunction with the accompanying drawings and embodiment, the utility model is described in detail.
A kind of oven temperature monitoring system, reference picture 1, including be arranged on furnace wall and be used to detect furnace wall temperature height with defeated
Go out the temperature-detecting device 1 of corresponding temperature detection signal, be electrically connected with temperature-detecting device 1 for prompting furnace wall temperature height
Display device 2, with temperature-detecting device 1 be electrically connected with comparison means 3 and with comparison means 3 be electrically connected with switch fill
Put 4.
Reference picture 1 and Fig. 2, temperature-detecting device 1 include being used to detect furnace wall temperature height to export corresponding size inspection
Survey signal detection circuit 11, with detect the amplifying circuit 12 that is electrically connected with to amplify detection signal of circuit 11 and with amplification
Circuit 12 is electrically connected with to filter out in detection signal interference signal with the filter circuit 13 of output temperature detection signal.
In the present embodiment, detection circuit 11 is adopted as Huygens's bridge circuit of thermistor composition, and amplifying circuit 12 is adopted
With the differential amplifier circuit 12 formed for operational amplifier, filter circuit 13 is filtered using RC, and specific circuit is connected as：
Detect circuit 11 include thermistor RT1, thermistor RT2, thermistor RT3, thermistor RT4, resistance R1,
Resistance R2, resistance R3, wherein thermistor RT1, thermistor RT2, thermistor RT3, thermistor RT4 are concatenated from beginning to end successively
Lopping, the tie point between thermistor RT1 and thermistor RT3 are connected to power supply VCC, thermistor RT2 and thermistor
Tie point ground connection between RT4, the tie point between thermistor RT1 and thermistor RT2 are connected to resistance R1 one end, electricity
It is grounded after hindering R1 other end series resistance R3, the tie point between thermistor RT3 and thermistor RT4 is connected to resistance R2
One end, the resistance R1 other end and the resistance R2 other end are used to export detection signal.
Amplifying circuit 12 includes operational amplifier U1, resistance R4 and slide rheostat RW, and slide rheostat RW is constituted
The zeroing portion 121 exported for stablizing amplifying circuit 12 under zero input state, operational amplifier U1 is adopted as in the present embodiment
OP01, the OP01 pin of in-phase input end 3 are connected to resistance R1 and the pin of inverting input 2 is connected to resistance R2 to receive detection
Signal, OP01 7 pins are connected to power supply VCC, while OP01 7 pins are connected to slide rheostat RW mobile terminal, OP01
1 pin, 8 pins be connected to slide rheostat RW two fixing ends, OP01 4 pins ground connection, OP01 6 pin strings
OP01 2 pins, while the detection signal after OP01 6 pins output amplification are connected to after connection resistance R10.
Filter circuit 13 includes resistance R5 and electric capacity C1, and wherein resistance R5 one end is connected to OP01 6 pins, resistance
It is grounded after R5 other end series capacitance C1, the resistance R5 other end exports final temperature detection signal simultaneously.
Reference picture 1 and Fig. 2, comparison means 3 be used for the size of C.T detection signal and temperature reference signal and
When temperature detection signal is less than temperature reference signal, output stops the voltage comparator circuit 31 of detection signal, for providing simultaneously
And the reference circuit 32 of regulation temperature reference signal magnitude, the physical circuit of comparison means 3 are connected as：
Voltage comparator circuit 31 includes comparator chip U2, and reference circuit 32 includes resistance R6 and slide rheostat
RP, wherein comparator chip U2 are adopted as LM393 in this embodiment, and LM393 in-phase input end is connected to resistance R5 to receive
Temperature detection signal, power supply VCC, LM393 reverse input end are connected to simultaneously after LM393 inverse output terminal series resistance R6
Slide rheostat RP a fixing end and sliding end are connected to, slide rheostat RP another sliding end ground connection, LM393's is defeated
Go out end output when temperature detection signal is less than temperature reference signal and stop detection signal.
Reference picture 2, switching device 4 disconnect to stop powering to temperature-detecting device 1 in response to stopping detection signal, switched
Device 4 include being electrically connected with comparison means 3 and in response to stop the transistor switching circuit 41 that turns on of detection signal and by
The conducting in transistor switching circuit 41 is controlled to stop the relay switching circuit 42 powered to detection circuit 11, switching device 4
Physical circuit be connected as:
Transistor switching circuit 41 includes triode VT1, the resistance R7 of NPN type, and relay switching circuit 42 includes normally closed
Formula relay KM1 and sustained diode 1, wherein triode VT1 base stage are connected to LM393 output end to receive detection
Stop signal, series resistance R7 is connected to power supply VCC to triode VT1 base stage simultaneously, and triode VT1 colelctor electrode is connected to electricity
It is grounded after source VCC, triode VT1 emitter stage SRE KM1, triode VT1 emitter stage is connected to diode simultaneously
D1 anode, triode VT1 minus earth, relay KM1 normally closed type switch contacts KM1 are connected on the confession of detection circuit 11
In circuit, i.e. one end of switch contacts KM1 is connected to the node between thermistor RT1 and thermistor RT4, switch contacts
The KM1 other end is connected to power supply VCC.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (8)
1. a kind of oven temperature monitoring system, it is characterized in that：It is used to detect furnace wall temperature height including being arranged on furnace wall with defeated
Go out the temperature-detecting device (1) of temperature detection signal, be electrically connected with and in response to temperature detection signal with temperature-detecting device (1)
To prompt the display device of furnace wall temperature height (2), be electrically connected with temperature-detecting device (1) and for C.T detection letter
Number be less than temperature reference signal with export stop detection signal comparison means (3) and with comparison means (3) be electrically connected with and
Disconnected in response to stopping detection signal to stop the switching device (4) to temperature-detecting device (1) power supply.
2. oven temperature monitoring system according to claim 1, it is characterized in that：The temperature-detecting device (1) includes using
It is electrically connected with detection furnace wall temperature height with exporting the detection circuit (11) of corresponding size detection signal and detection circuit (11)
Disturbed with the amplifying circuit (12) for amplifying detection signal and with amplifying circuit (12) electric connection with filtering out in detection signal
Signal is with the filter circuit (13) of output temperature detection signal.
3. oven temperature monitoring system according to claim 2, it is characterized in that：The detection circuit (11) is thermistor
Huygens's bridge circuit of composition.
4. oven temperature monitoring system according to claim 3, it is characterized in that：The amplifying circuit (12) is differential amplification
Device circuit.
5. oven temperature monitoring system according to claim 4, it is characterized in that：The differential amplifier circuit (12) electrically connects
It is connected to for stablizing the zeroing portion (121) exported under zero input state.
6. oven temperature monitoring system according to claim 1, it is characterized in that：The comparison means (3) include be used for than
It is less than temperature reference signal compared with temperature detection signal and stops the voltage comparator circuit (31) of detection signal, for providing to export
And adjust the reference circuit (32) of temperature reference signal magnitude.
7. oven temperature monitoring system according to claim 1, it is characterized in that：The switching device (4) is included compared with
Device (3) is electrically connected with and in response to stopping the transistor switching circuit (41) of detection signal conducting and being controlled by triode to open
The conducting of powered-down road (41) with stop circuit to detection (11) power supply relay switching circuit (42).
8. oven temperature monitoring system according to claim 1, it is characterized in that：The display device (2) is voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436668.XU CN206670820U (en) | 2017-04-24 | 2017-04-24 | Oven temperature monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720436668.XU CN206670820U (en) | 2017-04-24 | 2017-04-24 | Oven temperature monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206670820U true CN206670820U (en) | 2017-11-24 |
Family
ID=60375931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720436668.XU Expired - Fee Related CN206670820U (en) | 2017-04-24 | 2017-04-24 | Oven temperature monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206670820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081990A (en) * | 2019-04-29 | 2019-08-02 | 桂林电子科技大学 | A kind of switching circuit for intelligent thermometer |
-
2017
- 2017-04-24 CN CN201720436668.XU patent/CN206670820U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081990A (en) * | 2019-04-29 | 2019-08-02 | 桂林电子科技大学 | A kind of switching circuit for intelligent thermometer |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 Termination date: 20210424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |