CN103674165B - Oil level detection device for oil cup of range hood - Google Patents
Oil level detection device for oil cup of range hood Download PDFInfo
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- CN103674165B CN103674165B CN201310653491.5A CN201310653491A CN103674165B CN 103674165 B CN103674165 B CN 103674165B CN 201310653491 A CN201310653491 A CN 201310653491A CN 103674165 B CN103674165 B CN 103674165B
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- resistance
- oil
- hot type
- critesistor
- temperature
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 230000001050 lubricating effect Effects 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 9
- 230000001174 ascending effect Effects 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 10
- 230000005611 electricity Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Abstract
The invention discloses an oil level detection device for an oil cup of a range hood, which heats oil in the oil cup and detects the temperature of the oil through a heating thermistor on a detection circuit, then compares the front temperature and the rear temperature of the oil to obtain a corresponding temperature difference, and further analyzes and obtains the height of the oil in the oil cup, and finally displays the detected oil level height of the oil cup on a user interface, so that a user can clearly see the oil level height, and can remind people to clean the oil cup in time, thereby avoiding the phenomenon that dishes are influenced by the overflow of the oil and bringing convenience to the life of people.
Description
【Technical field】
The present invention relates to liquid level detection device, especially a kind of range hood oil cup oil level detecting device.
【Background technology】
At present, the lubricating cup of a lot of range hoods is hiding, and user can't see oil level, does not also know when lubricating cup meeting
Full, the life for therefore giving people is made troubles.
【Content of the invention】
The technical problem to be solved in the present invention is to provide a kind of range hood oil cup oil level detecting device, by detecting circuit
On hot type critesistor to lubricating cup in fluid heated and detected the temperature of fluid, compare temperature before and after fluid afterwards
Degree, draws the corresponding temperature difference, and then can analyze the height for drawing fluid in lubricating cup, finally show the lubricating cup level height for detecting
Show that user interface, user can be clearly seen that level height, people can be reminded to clear up lubricating cup in time, it is to avoid fluid overflow and
Dish, the life for giving people is affected to bring convenience.
For solving above-mentioned technical problem, the present invention relates to a kind of range hood oil cup oil level detecting device, including being located at suction
Be used for collecting the lubricating cup of fluid on lampblack absorber and lubricating cup stretched into for detecting the electrode of fluid liquid level, be provided with the electrode
For the detection circuit being connected with MCU, the detection circuit include being located at electrode lower end for detect in lubricating cup oil liquid temperature and
For the hot type critesistor R1 heated by fluid in lubricating cup.
The detection circuit also includes audion Q1, resistance R4, resistance R2 and resistance R3, the base stage of the audion Q1 with
Resistance R4 one end connects, and the resistance R4 other ends are the control signal input for detecting circuit, connect for the outfan with MCU
Connect, the grounded emitter of the audion Q1, the colelctor electrode of the audion Q1 respectively with hot type critesistor R1, resistance R2
Connect with resistance R3 one end, the hot type critesistor R1 other ends are connected with power supply VCC, the resistance R2 other ends are inspection
The detection signal outfan of slowdown monitoring circuit, is connected for the input with MCU, the resistance R3 other ends ground connection.
Be cased with the outside of the electrode by can the protection sleeve pipe that is connected with range hood of the upper end made of Heat Conduction Material, the guarantor
Conduction heat sealable glue is filled between protecting pipe and electrode.
The oily cup sidewall is provided with oil level graduation mark.
The present invention relates to a kind of range hood oil cup oil level detecting device, by detecting the hot type critesistor on circuit
Fluid in lubricating cup is heated and is detected the temperature of fluid, compares temperature before and after fluid afterwards, is drawn the corresponding temperature difference, is entered
And the height for drawing fluid in lubricating cup can be analyzed, the lubricating cup level height for detecting is shown to user interface, Yong Huke finally
To be clearly seen that level height, people can be reminded to clear up lubricating cup in time, it is to avoid fluid overflows and affects dish, the life for giving people
Work brings convenience.
【Description of the drawings】
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail, wherein：
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the circuit diagram for detecting circuit in the present invention.
【Specific embodiment】
Below in conjunction with the accompanying drawings embodiments of the present invention are elaborated.
A kind of range hood oil cup oil level detecting device of the present invention, is used for the oil for collecting fluid including being located on range hood
Cup 1 and lubricating cup 1 is stretched into for detecting the electrode 2 of fluid liquid level, be provided with oil level graduation mark 11, the electricity in 1 side wall of lubricating cup
The detection circuit 3 for being connected with MCU is provided with pole 2, and the detection circuit 3 includes that being located at 2 lower end of electrode is used for detecting lubricating cup 1
Middle oil liquid temperature and the hot type critesistor R1 for being heated to fluid in lubricating cup 1.
The detection circuit 3 also includes audion Q1, resistance R4, resistance R2 and resistance R3, the base stage of the audion Q1
It is connected with resistance R4 one end, the resistance R4 other ends are the control signal input for detecting circuit 3, for the output with MCU
End connection, the grounded emitter of the audion Q1, the colelctor electrode of the audion Q1 respectively with hot type critesistor R1, electricity
Resistance R2 and the connection of resistance R3 one end, the hot type critesistor R1 other ends are connected with power supply VCC, the resistance R2 other ends
For detecting the detection signal outfan of circuit 3, it is connected for the input with MCU, the resistance R3 other ends ground connection.
Be cased with the outside of the electrode 2 by can the protection sleeve pipe 21 that is connected with range hood of the upper end made of Heat Conduction Material, institute
State filled with conduction heat sealable glue 22 between protection sleeve pipe 21 and electrode 2, the heat that hot type critesistor R1 is produced can be successively
The fluid in lubricating cup 1 is transmitted to from conduction heat sealable glue 22 and protection sleeve pipe 21, equally, hot type critesistor R1 is also by leading
Heat seal glue 22 and protection sleeve pipe 21 carry out temperature detection to fluid in lubricating cup 1.
As shown in Fig. 2 biasing resistors of the resistance R4 for audion Q1, I/O is drive signal, during use, is connected with MCU,
Resistance R1 and resistance R3 composition bleeder circuits, current-limiting resistances of the resistance R2 for A/D data acquisitions, during use, A/D is attached to mould
On number converter.
Hot type critesistor R1 can be used not only for the temperature detection of medium, it is also possible to be used directly to heat medium.
Using the two features of hot type critesistor R1, and the switching characteristic with reference to audion Q1, by hot type critesistor
R1 is heated to the fluid in lubricating cup 1 and is detected two courses of work of oil liquid temperature, just can complete the detection of level height.
As hot type critesistor R1 radiating efficiencys and surrounding medium have a close relationship, different its heat conduction of material
Also different with heat-sinking capability.Hot type critesistor R1 is individually placed in air heat the identical time with fluid, due to liquid
Body is faster than the heat conduction of air, and radiating is also fast, and the value that air dielectric and fluid medium temperature rise must be differed；Conversely, such as
Fruit will make air dielectric and fluid medium reach same temperature, then need the time of hot type critesistor R1 heating different.
As shown in figure 1, the side wall of lubricating cup 1 is provided with oil level graduation mark 11, at different positions, hot type is warm for level height
It is unequal that quick resistance R1 is heated to the heat time heating time needed for same temperature to the fluid in lubricating cup 1.
The course of work of the present invention is as follows：
Generally I/O sets low level, and audion Q1 ends, and as resistance R3 resistances are very big, then flows through hot type critesistor
Electric current very little on R1, now hot type critesistor R1 use as a temperature sensor, start A/D converter collection plus
Heat type critesistor R1 and the partial pressure value of resistance R3, and current temperature value T1 of hot type critesistor R1 is calculated, T1 is and adds
The ambient temperature of heat type critesistor R1.When drive signal I/O is put high level, audion Q1 is turned on, hot type critesistor
There is larger electric current to pass through on R1, hot type critesistor R1 heatings produce heat, while the resistance of hot type critesistor R1
Vary with temperature and change, be heated to setting time, and ensure that each heat time heating time is equal, I/O is set low level, three poles
Pipe Q1 ends, and hot type critesistor R1 stops heating, now starts A/D converter collection hot type critesistor R1 and resistance
The partial pressure value of R3, you can calculate current temperature value T2 of hot type critesistor R1, and then obtain ascending temperature value T3=T2-
T1, as the height of oil level can change the radiating condition of hot type critesistor R1, that is to say, that in same time, oil
Position more low-temperature-rise is higher, otherwise oil level more high temperature rise is less, so different level height is corresponding to mono- a pair of ascending temperature value T3
Should, after obtaining ascending temperature value T3, you can calculate the height for analyzing oil level in range hood oil cup 1 by MCU.
Claims (3)
1. a kind of range hood oil cup oil level detecting device, it is characterised in that be used for collecting fluid including being located on range hood
Lubricating cup (1) and stretch into lubricating cup (1) for detect be provided with the electrode (2) of fluid liquid level, electrode (2) for MCU
The detection circuit (3) of connection, detection circuit (3) include that being located at electrode (2) lower end is used for detecting oil liquid temperature in lubricating cup (1)
With the hot type critesistor R1 for being heated to fluid in lubricating cup (1), detection circuit (3) also include audion
Q1, resistance R4, resistance R2 and resistance R3, the base stage of the audion Q1 are connected with resistance R4 one end, the resistance R4 other ends
For detecting the control signal input of circuit (3), it is connected for the outfan with MCU, the grounded emitter of the audion Q1,
The colelctor electrode of the audion Q1 is connected with hot type critesistor R1, resistance R2 and resistance R3 one end respectively, the hot type
The critesistor R1 other ends are connected with power supply VCC, detection signal outfan of the resistance R2 other ends for detection circuit (3),
It is connected for the input with MCU, the resistance R3 other ends ground connection；
Generally drive signal I/O sets low level, and audion Q1 ends, and as resistance R3 resistances are very big, then flows through hot type temperature-sensitive
Electric current very little on resistance R1, now hot type critesistor R1 use as a temperature sensor, start A/D converter adopt
The partial pressure value of collection hot type critesistor R1 and resistance R3, and current temperature value T1 of hot type critesistor R1 is calculated, T1 is
Ambient temperature for hot type critesistor R1；
When drive signal I/O is put high level, audion Q1 is turned on, and has larger electric current to pass through on hot type critesistor R1,
Hot type critesistor R1 heatings produce heat, while the resistance of hot type critesistor R1 is varied with temperature and is changed,
Setting time is heated to, and ensures that each heat time heating time is equal；
I/O is set low level, audion Q1 ends, and hot type critesistor R1 stops heating, now start A/D converter collection
Hot type critesistor R1 and the partial pressure value of resistance R3, you can calculate current temperature value T2 of hot type critesistor R1, enter
And ascending temperature value T3=T2-T1 is obtained, as the height of oil level can change the radiating condition of hot type critesistor R1,
In same time, oil level more low-temperature-rise is higher, otherwise oil level more high temperature rise is less, so different level heights correspond to upper intensification
Angle value T3 is corresponded, after obtaining ascending temperature value T3, you can is calculated by MCU and is analyzed oil level in range hood oil cup (1)
Height.
2. a kind of range hood oil cup oil level detecting device as described in claim 1, it is characterised in that electrode (2) outer sheath
Have by can the protection sleeve pipe (21) that is connected with range hood of the upper end made of Heat Conduction Material, protection sleeve pipe (21) and electrode
(2) conduction heat sealable glue (22) is filled between.
3. a kind of range hood oil cup oil level detecting device as described in claim 2, it is characterised in that lubricating cup (1) side wall sets
There is oil level graduation mark (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310653491.5A CN103674165B (en) | 2013-12-05 | 2013-12-05 | Oil level detection device for oil cup of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310653491.5A CN103674165B (en) | 2013-12-05 | 2013-12-05 | Oil level detection device for oil cup of range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103674165A CN103674165A (en) | 2014-03-26 |
| CN103674165B true CN103674165B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310653491.5A Active CN103674165B (en) | 2013-12-05 | 2013-12-05 | Oil level detection device for oil cup of range hood |
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| CN (1) | CN103674165B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222194B (en) * | 2015-10-23 | 2018-01-02 | 广东美的厨房电器制造有限公司 | The control method of smoke exhaust ventilator and smoke exhaust ventilator |
| CN107726391A (en) * | 2016-08-11 | 2018-02-23 | 九阳股份有限公司 | A kind of fuel-flow control method of lampblack absorber oil box |
| CN108827422B (en) * | 2018-06-28 | 2019-12-10 | 中国核动力研究设计院 | liquid metal liquid level continuous measuring device and liquid level measuring method thereof |
| CN108644856B (en) * | 2018-08-17 | 2024-01-09 | 佛山市云米电器科技有限公司 | Oil collecting cup with oil mass temperature and oil mass volume display function |
| CN110160105B (en) * | 2019-06-24 | 2024-02-23 | 珠海格力电器股份有限公司 | Oil cup heating method and device and range hood |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200950089Y (en) * | 2006-08-24 | 2007-09-19 | 张勇伟 | Temperature and water level integrated transducer |
| CN201199064Y (en) * | 2008-03-31 | 2009-02-25 | 浙江帅康电气股份有限公司 | Cooking fume exhauster with liquid level detecting and alarming functions |
| CN201476901U (en) * | 2009-07-08 | 2010-05-19 | 杨丽君 | Temperature liquid level sensor for solar water heater |
| CN102200463A (en) * | 2011-03-23 | 2011-09-28 | 泰州市瑞芝电子有限公司 | Liquid level linear measurement method based on impedance measurement |
| CN103196517A (en) * | 2013-03-14 | 2013-07-10 | 济南铁路天龙高新技术开发有限公司 | Hydraulic point machine oil tank oil level monitoring alarm device |
| CN203606003U (en) * | 2013-12-05 | 2014-05-21 | 华帝股份有限公司 | Detection device for oil level of oil cup of range hood |
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| CN103674165A (en) | 2014-03-26 |
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 528400 Guangdong Province, Zhongshan City Xiaolan Industrial Avenue South Road No. 1 Applicant after: Vatti Co., Ltd. Address before: 528400 Guangdong Province, Zhongshan City Xiaolan Industrial Avenue South Road No. 1 Applicant before: Zhongshan City Huadi Combustion Utensils Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: ZHONGSHAN CITY HUADI COMBUSTION UTENSILS CO., LTD. TO: VATTI CO., LTD. |
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