CN104534680A - Method for judging boiling point of water in boiler - Google Patents
Method for judging boiling point of water in boiler Download PDFInfo
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- CN104534680A CN104534680A CN201410752883.1A CN201410752883A CN104534680A CN 104534680 A CN104534680 A CN 104534680A CN 201410752883 A CN201410752883 A CN 201410752883A CN 104534680 A CN104534680 A CN 104534680A
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- 238000009835 boiling Methods 0.000 title claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 81
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- 238000010438 heat treatment Methods 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 9
- 239000000567 combustion gas Substances 0.000 claims description 6
- 238000010411 cooking Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
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- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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Abstract
The invention discloses a method for judging the boiling point of water in a boiler, which has the technical scheme that the temperature of a heated container in the boiler is detected by a temperature sensor; collecting an initial temperature rise value T1 of water in unit time S by a controller, and sequentially detecting subsequent temperature rise values TN of the water by the controller by the method, wherein N is a natural number greater than 1; if T1-TN is smaller than the set value, the controller continues to step A3 and compares with the set value until T1-TN is greater than or equal to the set value, and the water temperature reaches the boiling point. The invention is provided based on the condition that the temperature is difficult to accurately measure, the invention does not depend on the absolute value of the temperature, the boiling point can be calculated by measuring the temperature rise curve, the influence of the environment on the sensor is reduced, and the invention is simple and reliable. The gas stove with the boiling point judged by the method can realize intelligent control.
Description
[technical field]
The present invention relates to the method for water boiling point in a kind of indirect judgement water boiling device and utilize the boiling point judged automatically to control water boiling device.
[background technology]
At present, the function that a lot of water boiling device band is heated up water, such as water dispenser, electromagnetic oven, gas-cooker, split type automatic pot (soup) medicine device etc., but, because water boiling device directly cannot measure water temperature with temperature sensor, but judge boiling point by indirect inspection water container temperature, art methods can cause temperature measurement accuracy difficulty very large, as measured the words of the temperature of food or water in pressure cooker, carry out detected temperatures by the bottom of a pan mounting temperature sensor mostly, but in cooking bottom temperature and pot can there is advanced or delayed deviation in water temperature, institute accurately judges that boiling point is very difficult in this way, therefore there is a lot of water dispenser water temperature not reach boiling point and just stop heating, and electromagnetic oven, gas-cooker just can judge after then needing boiling point for a long time, cause energy waste, the water simultaneously drinking long-time boiling also can cause certain injury to health, split type automatic pot (soup) medicine device does not all judge the technology of boiling point in addition, the object of quantitative drug (soup) cannot be reached, this is also the defect of an industry technology of split type automatic pot (soup) medicine device.
People are when cooking food in addition, for shortening cooking time, need big fire heat food before boiling point, but when having arrived boiling point, need firepower to turn down, prevent soup from overflowing or food by burnt and economize energy, boiling point is the Rule of judgment that these electrical equipment realize automatic cooking, also be the foundation starting down-stream action, such as Baoshang, cooking rice, to cook congee etc., all first must judge boiling point, could realize automatically controlling, if boiling point judges inaccurate, also culinary art effect can be affected.
[summary of the invention]
The present invention seeks to overcome the deficiencies in the prior art, a kind of method providing water boiling device to judge water boiling point also automatically controls executing agency's change firepower with this or stops heating, and the method can judge the boiling point of water quickly and accurately by indirect thermometric.
The present invention is achieved by the following technical solutions:
Judge a method for water boiling point in water boiling device, it is characterized in that:
A1, to be detected in water boiling device by the temperature of heating container by temperature sensor 2;
A2, gather the temperature rise value of water in unit interval S by controller 1 and count T1;
A3, controller 1 detect the follow-up temperature rise value TN of water outlet successively by the method;
A4, compared by the value preset in controller 1 and program, as T1-TN is less than setting value, controller proceeds A3 step and compares with setting value, until T1-TN is more than or equal to setting value, then water temperature reaches boiling point;
A5, control by controller 1 power supply or the source of the gas that executing agency 3 closes water boiling device;
A6, control alarm unit 5 reminding user by controller 1.
The method of water boiling point in judgement water boiling device described above, is characterized in that: described water boiling device is gas-cooker 7, and between A4 and A5, also have A41 step, described executing agency 3 transfers described gas-cooker 7 to little fire and is heated to timer 4 predetermined time.
The method of water boiling point in judgement water boiling device described above, is characterized in that: described executing agency 3 comprises and being located on gas-cooker 7 for heating power Circuit tuning 301 with control combustion gas break-make and the gas flow control valve 302 of adjustment of combustion gas flow.
The method of water boiling point in judgement water boiling device described above, is characterized in that: described water boiling device is water dispenser or kettle, and described executing agency 3 comprises heating power Circuit tuning 301.
Compared with prior art, the present invention has the following advantages:
1, propose when the present invention is based on very difficult accurate thermometric, the present invention does not rely on the absolute value of temperature, as long as measure heating curve just can calculate boiling point, decreases the impact of environment on sensor, simple and reliable.
2, the present invention can put forward high boiling computational accuracy, basis is provided for much needing the Based Intelligent Control calculating boiling point, adopt the method to judge that the gas-cooker of boiling point can realize Based Intelligent Control, automatically can change firepower or cook automatic self-closing gas stove to the scheduled time after successfully judging boiling point.
[accompanying drawing explanation]
Fig. 1 is the flow chart that the present invention judges boiling point;
Fig. 2 is temperature rise curve Fig. 1 of the present invention;
Fig. 3 is temperature rise curve Fig. 2 of the present invention;
Fig. 4 is temperature rise curve Fig. 3 of the present invention;
Fig. 5 is the structural representation of embodiment of the present invention gas-cooker;
Fig. 6 is the flow chart that embodiment of the present invention gas-cooker controls automatically.
In figure; 1 is controller; 2 is temperature sensor; 3 is executing agency; 301 is heating power Circuit tuning; 302 is gas flow control valve; 4 is timer; 5 is alarm unit; 6 is pan; 7 is gas-cooker.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the invention will be further described, first introduce this boiling point determination methods institute foundation lower principle.
As shown in Figure 2, A, B, C are respectively the temperature rise curve of three tasks, and T1, T2, T3 are respectively the temperature raised in a unit interval S, and STA, STB, STC are respectively three tasks and reach time required for boiling point.
As seen from Figure 2, the time that the curve that in the unit interval, temperature rise is less reaches needed for boiling point is longer, and namely STA, STB, STC and T3, T2, T1 are inversely proportional to.That is suppose that a certain electrical equipment is when heating up water, its heating power is invariable, the thermal efficiency does not also change, radiating condition is also invariable, so obtain according to Practical Calculation: the inverse of STA, STB, STC and T3, T2, T1 is directly proportional, draw computing formula (for A curve) thus: STA=(1 ÷ T3) × K, in formula, K is regulation coefficient, is constant.
Water dispenser just can adopt above-mentioned computational methods to calculate boiling point, because the heating appliances of water dispenser, heating power, internal environment do not have very big-difference.
But a lot of electrical equipment at work often a lot of parameter be change, change the thermal efficiency that heating appliances just changes complete machine, change work bad border just changes radiating condition etc., will error be there is in the formula at this moment, as shown in Figure 3, error range is W, boiling point any point in the scope of W occurs, because the Parameters variation in real work is not very large, so the value of actual W is very little, computing formula should be ST=((1 ÷ T) × K) ± (W ÷ 2) as shown in Figure 3, in formula, W is the worst error value of actual measurement, K is regulation coefficient, this formulae discovery actual be a scope, that is boiling point one fixes within the scope of this formula and occurs, boiling point not within the scope of this formula should be caused by interference, can ignore and not process.
There is a boiling spread, also will calculate boiling point accurately, as shown in Figure 4, Here it is real work temperature rise curve, in close to boiling point, because steam progressively increases, the heat taken away also progressively increases, so temperature rise is also progressively slack-off, after reaching boiling point, because sensor is delayed, temperature is caused also can slowly to raise, until when heat absorption and heat radiation reach equalization point, temperature both can not raise and also can not reduce.
As shown in Figure 4, S1, S2, S3 are the equal time, but temperature rise T1, T2, T3 would not be equal, when T1 – T2 is more than or equal to setting value, namely think boiling point, the temperature change value and the T1 that also namely get the time of identical equal portions compare at every turn, judge whether T1 – T2 is more than or equal to setting value, if condition is set up and is boiling point, continue to judge whether T1 – T2 is more than or equal to setting value if condition is false, calculate boiling point always and occur.Due to a lot of interference can be run in real work, in order to prevent erroneous judgement, judge so above-mentioned scope also will be added.
Because current technology cannot accomplish the accurate temperature directly measuring water, thus temperature sensor measurement of the present invention all by the temperature of heating container.The step of concrete judgement water boiling point is as follows:
A1, to be detected in water boiling device by the temperature of heating container by temperature sensor 2;
A2, gather the temperature rise value of water in unit interval S by controller 1 and count T1;
A3, controller 1 detect the follow-up temperature rise value TN of water outlet successively by the method;
A4, compared by the value preset in controller 1 and program, as T1-TN is less than setting value, controller proceeds A3 step and compares with setting value, until T1-TN is more than or equal to setting value, then water temperature reaches boiling point;
A5, control by controller 1 power supply or the source of the gas that executing agency 3 closes water boiling device;
A6, control alarm unit 5 reminding user by controller 1.
If above-mentioned water boiling device is gas-cooker 7, then between A4 and A5, also has A41 step: described executing agency 3 transfers described gas-cooker 7 to little fire and is heated to timer 4 predetermined time.Described executing agency 3 comprises and being located on gas-cooker 7 for heating power Circuit tuning 301 with control combustion gas break-make and the gas flow control valve 302 of adjustment of combustion gas flow.
If above-mentioned water boiling device is water dispenser or kettle, described executing agency 3 comprises heating power Circuit tuning 301.
Described setting value is the empirical value of the actual measurement according to a certain electrical equipment, and also can change with the size variation of T1, setting value is when coding according to actual measurement and T1 value one_to_one corresponding, according to T1 value size, can table look-up and obtain when program is run simultaneously.
The setting value of usual different electrical equipment is not identical, but setting value all can be pre-set in the program of electrical equipment, and all the environment for use of electrical equipment can be taken into account, as water dispenser is different from the setting value of gas-cooker, but its setting value of same gas-cooker is identical, and setting value is not by the impact of the pan 6 that gas-cooker 7 uses, user more can not cause because setting value is different using inconvenience, and the contrary the method that adopts judges that the water boiling device of boiling point can realize Based Intelligent Control on this basis.If water boiling device is water dispenser, then can control executing agency 3 in next program stops heating heating up water, if water boiling device is gas-cooker, then control executing agency 3 in next program and turn firepower down or cook automatic self-closing gas stove to the scheduled time, prevent food cup burnt and save the energy.
Following employing gas-cooker 7 is heated up water and is carried out testing to illustrate the computational process of setting value, above-mentioned unit interval S is one minute, thermometric is carried out to the bottom of a pan be filled with water, cooking bottom temperature (room temperature) t0 ＇=20 DEG C before the heating of surveying, 1 minute, 2 minutes ... within 5 minutes, cooking bottom temperature is respectively t1 ＇=44 DEG C, t2 ＇=68 DEG C, t3 ＇=84 DEG C, t4 ＇=96 DEG C, t5 ＇=102 DEG C, find that water just reached boiling point at the 5th minute by directly measuring water temperature, but cooking bottom temperature also continues to raise after five minutes, heat radiator balance t6 ＇=107 DEG C are reached at six minutes, after this cooking bottom temperature no longer raises, the temperature rise calculating the interior the bottom of a pan per minute is respectively T1 ＇=t1 ＇-t0 ＇=24 DEG C, T2 ＇=t2 ＇-t1 ＇=24 DEG C, T3 ＇=t3 ＇-t2 ＇=16 DEG C, T4 ＇=t4 ＇-t3 ＇=12 DEG C, T5 ＇=t5 ＇-t4 ＇=6 DEG C, T6 ＇=t6 ＇-t5 ＇=5 DEG C, show that setting value is T1 ＇-T5 ＇=18 DEG C thus.
Also need repetitive measurement to obtain the mean value of setting value in addition, suppose that the mean value of setting value is just 18 DEG C, so when reality use directly can not measure water temperature, this kind of gas-cooker is adopted to heat up water, temperature (room temperature) t0=26 DEG C before the bottom of a pan heating of surveying, measurement per minute temperature, t1=50 DEG C, t2=71 DEG C, t3=90 DEG C, t4=95 DEG C, t5=99 DEG C, the temperature rise calculated is respectively T1=t1-t0=24 DEG C, T2=t2-t1=21 DEG C, T3=t3-t2=19 DEG C, T4=t4-t3=5 DEG C, T5=t5-t4=4 DEG C.T1-T2=3 DEG C, T1-T3=5 DEG C, all be less than 18 DEG C, and T1-T4=19 DEG C, T1-T5=20 DEG C is all greater than 18 DEG C, therefore just judges that water temperature reaches boiling point after measuring t4=95 DEG C, can stop heating, and without the need to continuing to be heated to t5=97 DEG C, solve the problem of the actual temperature of the advanced or delayed water of temperature sensor measurement cooking bottom temperature.
Embodiment of the present invention is only the description carried out the preferred embodiment of the present invention; not inventive concept and scope are limited; under the prerequisite not departing from design philosophy of the present invention; the various modification that in this area, engineers and technicians make technical scheme of the present invention and improvement, all should fall into protection scope of the present invention.
Claims (4)
1. judge a method for water boiling point in water boiling device, it is characterized in that:
A1, to be detected in water boiling device by the temperature of heating container by temperature sensor (2);
A2, count T1 by controller (1) collecting temperature sensor (2) temperature rise value in unit interval S;
A3, controller (1) detect follow-up temperature rise value TN successively by A2 step;
A4, compared by the value preset in controller (1) and program, as T1-TN is less than setting value, controller proceeds A3 step and compares with setting value, until T1-TN is more than or equal to setting value, then water temperature reaches boiling point;
A5, the power supply being controlled executing agency (3) closedown water boiling device by controller (1) or source of the gas;
A6, by controller (1) control alarm unit (5) reminding user.
2. judge the method for water boiling point in water boiling device according to claim 1, it is characterized in that: described water boiling device is gas-cooker (7), between A4 and A5, also have A41 step, described executing agency (3) transfers described gas-cooker (7) to little fire and is heated to timer (4) predetermined time.
3. judge the method for water boiling point in water boiling device according to claim 2, it is characterized in that: described executing agency (3) comprises and being located on gas-cooker (7) for heating power Circuit tuning (301) with control combustion gas break-make the gas flow control valve of adjustment of combustion gas flow (302).
4. judge the method for water boiling point in water boiling device according to claim 1, it is characterized in that: described water boiling device is water dispenser or kettle, described executing agency (3) comprises heating power Circuit tuning (301).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104840101A (en) * | 2015-06-12 | 2015-08-19 | 沁园集团股份有限公司 | Temperature-control Instant heating type water dispenser |
| CN105212694A (en) * | 2015-10-09 | 2016-01-06 | 珠海格力电器股份有限公司 | The defining method of the boiling point of water, device and electric pressure cooking saucepan under Different Altitude |
| CN105266576A (en) * | 2015-11-23 | 2016-01-27 | 珠海格力电器股份有限公司 | Method and apparatus for determining boiling point temperature, and electric pressure cooker |
| CN105935246A (en) * | 2016-02-25 | 2016-09-14 | 九阳股份有限公司 | Milk preparation method of soybean milk machine adapted to altitudes |
| CN106264072A (en) * | 2015-06-08 | 2017-01-04 | 佛山市顺德区美的电热电器制造有限公司 | Control the method and apparatus of cooking apparatus, cooking apparatus and terminal |
| CN107049004A (en) * | 2017-06-08 | 2017-08-18 | 佛山吉宝信息科技有限公司 | A kind of control method of thick film electric kettle |
| CN109806924A (en) * | 2019-02-25 | 2019-05-28 | 胡懿哲 | Chemical experiment hot water constant temperature mechanism and its thermostatic control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106264072A (en) * | 2015-06-08 | 2017-01-04 | 佛山市顺德区美的电热电器制造有限公司 | Control the method and apparatus of cooking apparatus, cooking apparatus and terminal |
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| CN105935246A (en) * | 2016-02-25 | 2016-09-14 | 九阳股份有限公司 | Milk preparation method of soybean milk machine adapted to altitudes |
| CN105935246B (en) * | 2016-02-25 | 2018-12-25 | 九阳股份有限公司 | A kind of pulping process of self elevation adaption soy bean milk making machine |
| CN107049004A (en) * | 2017-06-08 | 2017-08-18 | 佛山吉宝信息科技有限公司 | A kind of control method of thick film electric kettle |
| CN109806924A (en) * | 2019-02-25 | 2019-05-28 | 胡懿哲 | Chemical experiment hot water constant temperature mechanism and its thermostatic control method |
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Application publication date: 20150422 |