CN107300934A - A kind of water detection method detected based on capacitance in insulating pot kettle - Google Patents
A kind of water detection method detected based on capacitance in insulating pot kettle Download PDFInfo
- Publication number
- CN107300934A CN107300934A CN201710518631.6A CN201710518631A CN107300934A CN 107300934 A CN107300934 A CN 107300934A CN 201710518631 A CN201710518631 A CN 201710518631A CN 107300934 A CN107300934 A CN 107300934A
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- China
- Prior art keywords
- capacitance
- water
- water level
- detection method
- insulating pot
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Cookers (AREA)
Abstract
A kind of water detection method detected based on capacitance in insulating pot kettle, it is provided with kettle body, kettle body is equipped with the capacitance sensor of detection water amount information, and capacitance sensor is electrically connected to the heating component inside the control panel inside kettle body, control panel electrical connection kettle body.Detection means is used as by using capacitance sensor, water level information is detected, the water level information detected is handled by control panel simultaneously, can be according to the difference of the capacitance at different water level points, carry out in the detection of water in kettle, detection process, will not be because liquid component in kettle is different and influences the result of detection, make detection more accurate, reliably.
Description
Technical field
The present invention relates to water detection technique field, more particularly to a kind of water detected based on capacitance in insulating pot kettle
Quantity measuring method.
Background technology
Electric kettle is the higher household electrical appliances of general family's frequency of use, can be used to heat up water, makes tea.Electric kettle is most absolutely
Number is heated using heating wire, to ensure firing rate, and general heating power is higher, therefore, to avoid water as far as possible
The anhydrous dry combustion method of kettle, once dry combustion method, may cause kettle to damage, serious even occurs fire, Danger Electric shock risk.
Existing electric kettle nearly all detects function without water.Setting two is equivalent in the kettle of common electric kettle
Electrode, using the water in kettle as medium, the capacitance between two electrodes of detection, and then judge the water in pouring out kettle.
Using the water in kettle as medium, the capacitance between two electrodes of detection, and then judge the water in pouring out kettle.Due to
The composition of metal ion, the organic matter at various regions water source etc. is different, even if therefore under identical water, the water of different components is used as medium
The capacitance of generation is differed, and on the other hand, the solution that user boils sometimes is not necessarily water, it may be possible to tea, wine, fruits and vegetables
Juice etc., this results in great measurement error, ultimately causes misoperation.
Therefore, in view of the shortcomings of the prior art, providing a kind of water detection method detected based on capacitance in insulating pot kettle
It is not enough very necessary to solve prior art.
The content of the invention
There is provided a kind of based on capacitance detection insulating pot it is an object of the invention to avoid the deficiencies in the prior art part
Water detection method in water detection method in kettle, the insulating pot kettle will not be produced because of the composition difference of solution in kettle
Big error, does not result in misoperation, so that testing result is more accurate, reliably.
The above-mentioned purpose of the present invention is realized by following technological means.
A kind of water detection method detected based on capacitance in insulating pot kettle is provided, kettle body, the kettle body dress is provided with
Capacitance sensor equipped with detection water amount information, the capacitance sensor is electrically connected to the control panel of kettle body setting, chain of command
The capacitance that plate is detected by the capacitance sensor at different water level points judges that corresponding water amount information is judged, the control
The liquid that panel electrically connects the heating component inside kettle body and controls heating component to be contained in kettle body meets safe capacity
Under the conditions of heated.
Specifically, the concrete operation step of the control panel is as follows：
Preset each water level point PiLocate the initial capacitance threshold values C of capacitance sensorfi, i=1,2 ..., n, n are natural number；
Control panel passes through capacitance sensor sensed water level point PiThe capacitance information C ' at placefi；
C ' is judged againfiWith CfiNumerical values recited.
It is preferred that, determination methods are as follows：
S11, work as C 'fiValue be more than or equal to CfiValue, then be judged as there is water at the water level point；
S12, work as C 'fiValue be less than CfiValue, then be judged as there is no water at the water level point.
Specifically, the initial capacitance threshold values is the rated capacity value of detection water amount information.
Further, the capacitance sensor at least one be assemblied at lowest water level point, at the lowest water level point
Capacitance sensor detection lowest water level height.
Further, the control panel, which is worked as, detects lowest water level point P1The C ' at placef1Value be less than Cf1Value when, control
Panel control heating component stops heating.
It is preferred that, the arrangement mode of the water level point is equidistantly vertical distribution.
Further, the window of non-metallic material is provided with the water level point.
Specifically, the heating component is heating tube.
It is preferred that, the heating component is heater strip.
By the present invention in that being detected with capacitance sensor as detection means to water level information, while will detect
Water level information handled by control panel, water in kettle can be carried out according to the difference of the capacitance at different water level points
In the detection of amount, detection process, because liquid component in kettle is different and influences the result of detection detection will not be made more accurate,
Reliably.
Brief description of the drawings
Using accompanying drawing, the present invention is further illustrated, but the content in accompanying drawing does not constitute any limit to the present invention
System.
Fig. 1 is a kind of system block diagram of the water detection method detected based on capacitance in insulating pot kettle of the present invention.
Fig. 2 is a kind of structural representation of insulating pot in water detection method detected based on capacitance in insulating pot kettle.
Fig. 3 is Fig. 1 sectional view.
Fig. 4 is the first embodiment structural representation of heating component in Fig. 3.
Fig. 5 is the second embodiment structural representation of heating component in Fig. 3.
In from Fig. 1 to Fig. 2, including：
1st, kettle body；
2nd, capacitance sensor；
3rd, control panel；
4th, heating component；
41st, heating tube；
42nd, heater strip.
Embodiment
The invention will be further described with the following Examples.
Embodiment 1.
As Figure 1-3, the water detection method in a kind of insulating pot kettle based on capacitance sensor 2, is provided with kettle body
1, kettle body 1 is equipped with the capacitance sensor 2 of detection water amount information, and capacitance sensor 2 is electrically connected to the control panel of the setting of kettle body 1
3, the capacitance that control panel 3 is detected by the capacitance sensor 2 at different water level points judges that corresponding water amount information is sentenced
Disconnected, the control panel 3 electrically connects the heating component 4 inside kettle body 1 and the liquid for controlling heating component 4 to be contained in kettle body 1
Body is heated under conditions of meeting safe capacity.
The water level information at each water level point that 3 pairs of control panel is collected into is handled.The concrete operations step of control panel 3
It is rapid as follows：
Preset each water level point PiLocate the initial capacitance threshold values C of capacitance sensor 2fi, i=1,2 ..., n, n are natural number.
Initial capacitance threshold values is the rated capacity value of detection water amount information.
Initial capacitance threshold value can also be interval value, and one is the capacitance under anhydrous state, and another is to have watery
Capacitance under state, has the capacitance under water state to be more than the capacitance under anhydrous state, due to being only existed at correspondence water level point
Have water state and anhydrous state, thus the capacitance that will not fall under water state of the capacitance detected in detection process and
In the interval of capacitance under anhydrous state, when the capacitance detected is less than the capacitance under anhydrous state, it is determined that in kettle
It is anhydrous；When the capacitance detected is more than the capacitance having under water state, it is determined that there is water in kettle.
Control panel passes through capacitance sensor sensed water level point PiThe capacitance information C ' at placefi。
C ' is judged againfiWith CfiNumerical values recited.
Determination methods are as follows：
S11, work as C 'fiValue be more than or equal to CfiValue, then be judged as there is water at the water level point.
S12, work as C 'fiValue be less than CfiValue, then be judged as there is no water at the water level point.
When control panel 3 detects lowest water level point P1The C ' at placef1Value be less than Cf1Value when, control panel 3 control plus
Hot component 4 stops heating.In order to avoid electric kettle dryouies, cause accident.
In order that measurement result more specification.It is equidistantly vertical distribution by the arrangement mode of water level point.
Because most of kettle body 1 material of itself is metal material, the easy measurement result of influence capacitance sensor 2.Institute
To be provided with the window of non-metallic material at water level point.
By the present invention in that being detected with capacitance sensor 2 as detection means to water level information, while will detect
Water level information handled by control panel 3, water in kettle can be carried out according to the difference of the capacitance at different water level points
In the detection of amount, detection process, because liquid component in kettle is different and influences the result of detection detection will not be made more accurate,
Reliably.
Embodiment 2.
A kind of water detection method in insulating pot kettle based on capacitance sensor 2, further feature is same as Example 1,
Difference is：The concrete operation method of control panel 3 is as follows：
Provided with 3 water level points, and at each water level point, correspondence is equipped with a capacitance sensor 2, control panel to kettle body 1
3 set the initial capacitance threshold values difference at the initial capacitance threshold values of capacitance sensor 2 at each water level point, water level point 1,2 and 3
For Cf1、Cf2And Cf3。
Control panel 3 detects water level point P by capacitance sensor 21、P2And P3Detection capacitance be respectively C 'f1、
C’f2And C 'f3。
If C 'f1More than Cf1, then it is judged as water level point P1There is water；If Cf1Less than Cf1, judge water spot P1It is anhydrous.Other water levels
Point with water level point P1Judgment step is identical, respectively to the detection at the initial capacitance threshold values at water level point and correspondence water level point
Capacitance information is contrasted, and learns at the water level point whether there is water.
Water detection method in the insulating pot kettle of the present invention, will not produce big mistake because of the composition difference of solution in kettle
Difference, does not result in misoperation.Detect and control and be more reliable.
Embodiment 3.
A kind of water detection method in insulating pot kettle based on capacitance sensor 2, further feature is same as Example 1,
Difference is：As shown in figure 4, heating component 4 is heating tube 41.
It should be noted that because the heating surface area of heating tube 41 is larger, cause that heat distributes is relatively slow, so that, disconnected
There is certain heat insulation effect after electricity.
Embodiment 4.
A kind of water detection method in insulating pot kettle based on capacitance sensor 2, further feature is same as Example 1,
Difference is：As shown in figure 5, heating component 4 is heater strip 42.
It should be noted that using heating wire winding into discoid as heating component 4, because the diameter of heating wire is smaller,
Heating wire and the contact area of the bottom of kettle body 1 after winding is bigger, can improve firing rate, make the efficiency of heating surface higher.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of scope, although being explained in detail with reference to preferred embodiment to the present invention, one of ordinary skill in the art should manage
Solution, technical scheme can be modified or equivalent substitution, without departing from technical solution of the present invention essence and
Scope.
Claims (10)
1. a kind of water detection method detected based on capacitance in insulating pot kettle, it is characterised in that：It is provided with kettle body, the kettle
Body is equipped with the capacitance sensor of detection water amount information, and the capacitance sensor is electrically connected to the control panel of kettle body setting, control
The capacitance that panel processed is detected by the capacitance sensor at different water level points judges corresponding water amount information, the control panel
The liquid for electrically connecting the heating component inside kettle body and controlling heating component to be contained in kettle body meets the condition of safe capacity
It is lower to be heated.
2. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 1, its feature is existed
In：
Preset each water level point PiLocate the initial capacitance threshold values C of capacitance sensorfi, i=1,2 ..., n, n is natural number；
Control panel passes through capacitance sensor sensed water level point PiThe capacitance information C ' at placefi；
C is judged again,fiWith CfiNumerical values recited.
3. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 2, its feature is existed
In：Determination methods are as follows：
S11, work as C 'fiValue be more than or equal to CfiValue, then be judged as there is water at the water level point；
S12, work as C 'fiValue be less than CfiValue, then be judged as there is no water at the water level point.
4. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 3, its feature is existed
In：The initial capacitance threshold values is the rated capacity value of detection water amount information.
5. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 4, its feature is existed
In：At least one is assemblied at lowest water level point the capacitance sensor, the capacitance sensor inspection at the lowest water level point
Survey lowest water level height.
6. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 5, its feature is existed
In：The control panel, which is worked as, detects lowest water level point P1The C ' at placef1Value be less than Cf1Value when, control panel control heating group
Part stops heating.
7. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 6, its feature is existed
In：The arrangement mode of the water level point is equidistantly vertical distribution.
8. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 7, its feature is existed
In：The window of non-metallic material is provided with the water level point.
9. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 8, its feature is existed
In：The heating component is heating tube.
10. a kind of water detection method detected based on capacitance in insulating pot kettle according to claim 8, its feature is existed
In：The heating component is heater strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710518631.6A CN107300934A (en) | 2017-06-30 | 2017-06-30 | A kind of water detection method detected based on capacitance in insulating pot kettle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710518631.6A CN107300934A (en) | 2017-06-30 | 2017-06-30 | A kind of water detection method detected based on capacitance in insulating pot kettle |
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| CN107300934A true CN107300934A (en) | 2017-10-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108279052A (en) * | 2018-01-26 | 2018-07-13 | 厦门拓宝科技有限公司 | A kind of auto-oscillation type caravan cistern water level detection method of high reliability |
| CN111010757A (en) * | 2019-12-20 | 2020-04-14 | 深圳市鑫汇科股份有限公司 | Electromagnetic heating method and electromagnetic heating device |
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| CN201034693Y (en) * | 2007-05-30 | 2008-03-12 | 黄樟焱 | Device detecting water level and water temperature |
| CN103292862A (en) * | 2012-02-24 | 2013-09-11 | 罗红光 | Water level detection circuit based on capacitance principle |
| CN105189878A (en) * | 2013-03-13 | 2015-12-23 | 德尔塔阀门公司 | Apparatus and method for reducing cross-talk between capacitive sensors |
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| CN108279052A (en) * | 2018-01-26 | 2018-07-13 | 厦门拓宝科技有限公司 | A kind of auto-oscillation type caravan cistern water level detection method of high reliability |
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Application publication date: 20171027 |
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