CN104414485A - Liquid heating device and control method thereof - Google Patents

Abstract

The invention discloses a control method of a liquid heating device. The method includes: acquiring target temperature, controlling the liquid heating device for heating for a first preset time, suspending heating for a second preset time and acquiring a temperature variation value of liquid between the first preset time and the second preset time after the liquid heating device heats the liquid for the first preset time, and further acquiring a power-off temperature point or concurrent heating time of the liquid heating device; controlling the liquid heating device to continue heating when the present temperature of the liquid in the liquid heating device is lower than the power-off temperature point, controlling the liquid heating device to suspend heating when the liquid temperature reaches the power-off temperature point, and when the present temperature of the liquid is higher than the power-off temperature point and lower than the target temperature, calculating the concurrent heating time and controlling the liquid heating device to heat the liquid continuously for the concurrent heating time until the liquid temperature reaches the target temperature. According to the control method, errors between the liquid heating temperature and the target temperature are able to be decreased, and temperature control is executed more accurately. Meanwhile, the invention further discloses the liquid heating device.

Description

Liquid heating and control method thereof

Technical field

The present invention relates to kitchen guarding's technical field of electric appliances, the control method of particularly a kind of liquid heating, and this liquid heating.

Background technology

In prior art, carry out to boil water with electric kettle, for the water of certain temperature such as 80 DEG C, no matter the voltage of the electric kettle adopted is much, whether the water yield is identical, and electric kettle is all in same temperature spot power-off, thus cause the temperature of actual water and target temperature difference very large, temperature controls inaccurate, can only under the condition that same voltage, the water yield are identical, and the control for the temperature of water is more accurate.In addition, some electric kettles are when heating, and the temperature that in electric kettle, temperature sensor detects and the temperature of healed water exist the temperature difference, and, under the water yield, voltage conditions different situations, both temperature difference are obviously different especially, thus make the temperature control of electric kettle more inaccurate.

Summary of the invention

Object of the present invention is intended to solve one of above-mentioned technical problem at least to a certain extent.

For this reason, first object of the present invention is the control method proposing a kind of liquid heating, and the control method of this liquid heating can carry out temperature control more exactly, can reduce the deviation by the temperature of heating liquid and target temperature.

Second object of the present invention is to propose a kind of liquid heating.

For reaching above-mentioned first object, the present invention proposes a kind of control method of liquid heating, and this control method comprises the following steps: obtain target temperature; Control described liquid heating and heat the first Preset Time; After described liquid heating heats the first Preset Time, control described liquid heating and suspend heating second Preset Time, and obtain the temperature change value of liquid in described first Preset Time and described second Preset Time in described liquid heating; The power-off temperature spot of described liquid heating is obtained according to described temperature change value and described target temperature; Judge whether the Current Temperatures of liquid in described liquid heating is less than described power-off temperature spot, when in described liquid heating, the Current Temperatures of liquid is less than described power-off temperature spot, control described liquid heating and continue heating, until described heating liquid ancestral hold high within the temperature of liquid control described liquid heating when reaching described power-off temperature spot and suspend heating; When the Current Temperatures of liquid in described liquid heating be greater than described power-off temperature spot be less than described target temperature time, calculate the concurrent heating time, and control described liquid heating continue heating the described concurrent heating time; And after liquid heating heats the described concurrent heating time, control described liquid heating power-off and stop heating.

According to the control method of the liquid heating of the embodiment of the present invention, by controlling liquid heating preheating first Preset Time, the error between the detected temperatures value of liquid heating and actual value can be reduced, know temperature stabilization ascent stage simultaneously, and control liquid heating time-out heating second Preset Time, and then the temperature change value of liquid in the first Preset Time and the second Preset Time obtained in described liquid heating, power-off temperature spot is obtained according to temperature change value, and then be less than power-off temperature spot control liquid heating in the heating of power-off temperature spot time-out at the Current Temperatures of liquid, and when liquid Current Temperatures is greater than power-off temperature spot and is less than target temperature, calculate the concurrent heating time, control the liquid heating heating concurrent heating time to reach target temperature, the error of heating liquid temperature and target temperature can be reduced, carry out temperature control more exactly.

In one embodiment of the invention, the control method of aforesaid liquid heater, before the described liquid heating of control heats the first Preset Time, can also comprise: the Current Temperatures detecting liquid in described liquid heating; Judge whether the Current Temperatures of liquid in described liquid heating is less than the difference of described power-off temperature spot and the preset temperature changing value in described first Preset Time and described second Preset Time; If so, then control described liquid heating to heat; And when the Current Temperatures of liquid in described liquid heating is greater than differing from and being less than described target temperature of described power-off temperature spot and preset temperature changing value in described first Preset Time and described second Preset Time, calculate the concurrent heating time, and control the described liquid heating continuation heating concurrent heating time.

In another embodiment of the present invention, after acquisition target temperature, and control before described liquid heating heats the first Preset Time, also comprise: when the difference of described Current Temperatures and described target temperature is less than or equal to the difference of described target temperature and preset temperature changing value, controls described liquid heating and do not heat; When the difference of described Current Temperatures and described target temperature is greater than the difference of described target temperature and preset temperature changing value, controls described liquid heating and heat.

Wherein, described preset temperature changing value is 10 DEG C ~ 30 DEG C.

In one embodiment of the invention, after detecting the Current Temperatures of the liquid in described liquid heating, also comprise: judge whether the Current Temperatures of the liquid in described liquid heating is in the decline stage; If described Current Temperatures is in the decline stage, does not control described liquid heating and heat; And if described Current Temperatures is in the non-decreasing stage, controls described liquid heating and heat.

In another embodiment of the present invention, in the control method of aforesaid liquid heater, after controlling the heating of described liquid heating time-out when the temperature of liquid reaches described power-off temperature spot in described liquid heating, can also comprise: after described liquid heating suspends heating the 3rd Preset Time, judge whether the temperature of liquid in described liquid heating reaches described target temperature; If the temperature of liquid reaches described target temperature in described liquid heating, then control described liquid heating power-off and stop heating; If the temperature of liquid does not reach described target temperature in described liquid heating, obtain the described concurrent heating time according to described target temperature, described temperature change value and described Current Temperatures; According to described concurrent heating time controling, liquid heating carries out heating to make the temperature of liquid in described liquid heating reach described target temperature.

Suspend heating in control liquid heating at power-off temperature spot, when the temperature miss the mark temperature of liquid heating, the temperature of liquid heating and the temperature difference of target temperature can be made to reduce by further concurrent heating.

Further, when liquid heating heats according to described concurrent heating time controling, control described liquid heating according to described temperature change value and suspend with carrying out sequence and heat to make the temperature of liquid in described liquid heating reach described target temperature.

Described liquid heating comprises temperature detector, in one embodiment of the invention, the control method of aforesaid liquid heater can also comprise: inquire about the mapping table that prestores according to described temperature change value to correct the detected value of described temperature detector, wherein, described mapping table is the one_to_one corresponding table of difference of actual temperature of described temperature change value, described power-off temperature spot and described detected value and described liquid heating.

In another embodiment of the present invention, described liquid heating comprises temperature detector, and described control method also comprises: correct according to the detected value of following temperature correction formula to described temperature detector:

T=current temperature value+M+N; Wherein,

M=(current temperature value/a) * 2+ current temperature value/b+ current temperature value/c-(current temperature value/d);

N=temperature change value/e+ temperature change value/f+ temperature change value/g;

T is the temperature after correction, M and N is temperature correction value, and a, b, c, d, e, f and g are constant.

In one embodiment of the invention, the detected value of the described temperature detector after correction can be shown.

By the temperature value after display is corrected can make to know more accurate by the temperature of heating liquid.

For achieving the above object, second aspect present invention embodiment proposes a kind of liquid heating, and this liquid heating comprises cavity, cavity, Offered target temperature device is set, described the surface that device is positioned at described cavity is set, for the heater heated, temperature detector, described temperature detector is used for tracer liquid temperature, controller, described controller arranges device with described respectively, described heater is connected with described temperature detector, described controller controls described heater and heats the first Preset Time, and after described heater heats the first Preset Time, control described heater suspend heating second Preset Time and obtain the temperature change value of described liquid in described first Preset Time and described second Preset Time, and the power-off temperature spot of described heater is obtained according to described temperature change value and described target temperature, and judge whether the temperature of described liquid is less than described power-off temperature spot according to Current Temperatures, and when the temperature of described liquid is less than described power-off temperature spot, control described heater and continue heating, until the temperature of described liquid reaches described power-off temperature spot control the heating of described heater time-out, and the Current Temperatures of liquid is greater than described power-off temperature spot when being less than described target temperature in liquid heating, calculate the concurrent heating time, and control the described liquid heating continuation heating described concurrent heating time, and after liquid heating heats the described concurrent heating time, control described liquid heating power-off and stop heating.

According to the liquid heating of the embodiment of the present invention, controller control heater heats the first Preset Time, the error between the temperature detection value of liquid in liquid heating and actual value can be corrected, find out temperature stabilization ascent stage simultaneously, and control liquid heating time-out heating second Preset Time, and then obtain the temperature change value of liquid in the first Preset Time and the second Preset Time, the power-off temperature spot of heater is obtained according to temperature change value, and then when the temperature of liquid is less than power-off temperature spot, control heater continues heating, and when liquid Current Temperatures is greater than power-off temperature spot and is less than target temperature, calculate the concurrent heating time, control the liquid heating heating concurrent heating time to reach target temperature, thus the heating-up temperature of liquid and the error of target temperature can be reduced, carry out temperature control more exactly.

Further, in one embodiment of the invention, before described liquid heating heats the first Preset Time, described temperature detector detects the Current Temperatures of liquid in described liquid heating, described controller judges whether the Current Temperatures of liquid in described liquid heating is less than the difference of described power-off temperature spot and the preset temperature changing value in described first Preset Time and described second Preset Time, and when described Current Temperatures is less than described power-off temperature spot and preset temperature changing value in described first Preset Time and described second Preset Time poor, control described liquid heating to heat, and when in described liquid heating, the Current Temperatures of liquid is greater than differing from and being less than described target temperature of described power-off temperature spot and preset temperature changing value in described first Preset Time and described second Preset Time, calculate the concurrent heating time, and control the described liquid heating continuation heating concurrent heating time.

In one embodiment of the invention, before described liquid heating heats the first Preset Time, when the difference of described Current Temperatures and described target temperature is less than or equal to described target temperature and preset temperature changing value poor, described controller controls described liquid heating and does not heat; When the difference of described Current Temperatures and described target temperature is greater than the difference of described target temperature and preset temperature changing value, described controller controls described liquid heating and heats.

Wherein, described preset temperature changing value is 10 DEG C ~ 30 DEG C.

In another embodiment of the present invention, described controller is also for judging whether the Current Temperatures of the liquid in described liquid heating is in the decline stage, and be in the decline stage at described Current Temperatures and do not control described liquid heating and heat, and be in the non-decreasing stage at described Current Temperatures and then control described liquid heating and heat.

In one embodiment of the invention, when in described liquid heating, the temperature of liquid reaches described power-off temperature spot, after described controller controls the heating of described liquid heating time-out, and after described heater suspends heating the 3rd Preset Time, controller judges whether the temperature of described liquid reaches described target temperature, and when the temperature of described liquid does not reach described target temperature, according to described target temperature, described temperature change value and described Current Temperatures obtain the described concurrent heating time, and heater carries out heating to make the temperature of described liquid reach target temperature according to described concurrent heating time controling.

In one embodiment of the invention, when according to described concurrent heating time controling, liquid heating heats, described controller also suspends for controlling described heater according to described temperature change value and heats to make the temperature of liquid in described liquid heating reach described target temperature with carrying out sequence.

In addition, in one embodiment of the invention, described temperature detector can be positioned at the inside of described cavity, and described temperature detector can with the liquid comes into contact in described cavity.

In another embodiment of the present invention, described temperature detector can be arranged on the outer wall of described cavity.

In one embodiment of the invention, described controller is also for inquiring about the mapping table that prestores to correct the detected value of described temperature detector according to described temperature change value, wherein, described mapping table is the one_to_one corresponding table of the difference of the actual temperature of liquid in described temperature change value and described power-off temperature spot and described detected value and described liquid heating.

In another embodiment of the present invention, described controller corrects according to the detected value of following temperature correction formula to described temperature detector:

T=current temperature value+M+N; Wherein,

M=(current temperature value/a) * 2+ current temperature value/b+ current temperature value/c-(current temperature value/d);

N=temperature change value/e+ temperature change value/f+ temperature change value/g;

T is the temperature after correction, M and N is temperature correction value, and a, b, c, d, e, f and g are constant.

Can know more accurately by the temperature of heating liquid by carrying out correcting to the detected value of temperature detector and temperature value.

Further, aforesaid liquid heater can also comprise: display, and described display is connected with described controller, for showing the detected value of the described temperature detector after described correction.

The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.

Accompanying drawing explanation

The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:

Fig. 1 is the flow chart of the control method of liquid heating according to the embodiment of the present invention;

Fig. 2 is the flow chart of the control method of liquid heating according to an embodiment of the invention;

Fig. 3 is the flow chart of the control method of liquid heating according to another embodiment of the invention;

Fig. 4 is the schematic diagram of the liquid heating according to the embodiment of the present invention; And

Fig. 5 is the schematic diagram of liquid heating according to an embodiment of the invention.

Reference numeral:

Cavity 301, device 302, temperature detector 303 and controller 304 are set, display 401.

Detailed description of the invention

Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.

Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.

In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.

Control method and the liquid heating of the liquid heating proposed according to the embodiment of the present invention are described with reference to the accompanying drawings.

Fig. 1 is the flow chart of the control method of liquid heating according to the embodiment of the present invention.As shown in Figure 1, the control method of the liquid heating of the embodiment of the present invention comprises the following steps:

S101, obtains target temperature.

After liquid heating powers on, namely setting target temperature sets the temperature needing heating liquid to arrive, after setting target temperature, control liquid heating to heat, and control it and heat the first Preset Time, namely control liquid heating preheating first Preset Time, namely enter step S102.

S102, controls liquid heating and heats the first Preset Time.

It should be noted that, can set the first Preset Time based on experience value, but need to ensure after control liquid heating heats the first Preset Time, the temperature of liquid heating is in the stable temperature rise period, the total time such as continuously liquid can boiled by tracer liquid heater, and the actual temperature of liquid in the boiling part of maximum amount of liquid and minimum amount of liquid and the temperature of detection, analyze the data obtained and determine the first Preset Time, the error that the first Preset Time can reduce between the detected temperatures value of liquid heating and actual temperature value is heated by controlling liquid heating.After control liquid heating heats the first Preset Time, enter step S103.

S103, after liquid heating heats the first Preset Time, controls liquid heating and suspends heating second Preset Time and the temperature change value of liquid in the first Preset Time and the second Preset Time obtained in liquid heating.

After step S102 control liquid heating heats the first Preset Time, control liquid heating and suspend heating, after liquid heating suspends heating, due to thermal inertia, the temperature of liquid heating can continue change, control liquid heating and suspend heating second Preset Time, second Preset Time can be understood as and controls the time that liquid heating suspends that moment and liquid heating temperature stabilization moment, obtain the temperature change value of liquid heating in the first Preset Time and the second Preset Time, particularly, after step S101 controls liquid heating preheating first Preset Time, control liquid heating and suspend heating, obtain the temperature suspending the moment, treat the temperature of liquid heating tend towards stability or stable after obtain its temperature, and calculate the changing value of the temperature of liquid in the first Preset Time and the second Preset Time.

It should be noted that, namely the temperature change value that also can obtain in certain period obtains temperature rise Mean Speed, variations in temperature within certain time period can signify temperature rise Mean Speed, detection once can not represent the temperature rise Mean Speed of liquid heating in the whole heating period of the embodiment of the present invention, but the feature of the temperature variations in certain stage can be reflected, duplicate detection can be carried out to the temperature variations of the heating period of liquid heating as required.

S104, obtains the power-off temperature spot of liquid heating according to temperature change value and target temperature.

The target temperature of the temperature change value obtained according to step S103 and step S101 setting obtains the power-off temperature spot of liquid heating, particularly, the temperature change value of target temperature or the temperature change value in certain period and temperature rise Mean Speed can be corresponded to by inquiry and obtain power-off temperature spot with the corresponding table of power-off temperature spot, wherein, corresponding table can obtain by experiment and be pre-stored in liquid heating.It should be noted that, when Current Temperatures distance objective temperature is far away, power-off temperature spot can be obtained, because the temperature change value approximately equal that temperature change value after power-off temperature spot controls liquid heating power-off and the temperature change value suspended between the period of heating and step S103 obtain will be ensured.Step S105 is entered after obtaining power-off temperature spot.

S105, judges whether the Current Temperatures of liquid in liquid heating is less than power-off temperature spot.

The power-off temperature spot obtained according to step S104 and the current temperature of liquid heating, judge whether Current Temperatures is less than power-off temperature spot, and when Current Temperatures is less than power-off temperature spot, enter step S106, otherwise, enter step S107.

S106, controls liquid heating and continues heating, until control liquid heating when the temperature of liquid reaches power-off temperature spot in liquid heating to suspend heating.

When in liquid heating, the Current Temperatures of liquid is less than power-off temperature spot, then control liquid heating and continue heating, when the temperature of liquid heating arrives power-off temperature spot, control liquid heating and stop heating, thus can realize controlling liquid heating power-cut time, the error between heating-up temperature and target temperature can be reduced.

S107, when the Current Temperatures of liquid in liquid heating be greater than power-off temperature spot be less than target temperature time, calculate the concurrent heating time, and control liquid heating continue heating the concurrent heating time.

The temperature of the liquid judged in liquid heating according to step S105 is greater than power-off temperature spot, and when being less than setting target temperature, then liquid heating needs to carry out concurrent heating, the temperature of liquid just can be made to reach target temperature, then obtain the described concurrent heating time according to described target temperature, described temperature change value and described Current Temperatures.And controlling liquid heating continuation heating, the heat time is calculate the concurrent heating time obtained, and after the liquid heating heating concurrent heating time, enters step S108.Particularly, the target temperature that the temperature change value that can obtain according to step S103, the Current Temperatures of liquid heating and step S101 set obtains the concurrent heating time, arrives target temperature namely to continue heating to liquid heating concurrent heating to make its temperature.Particularly, can the temperature difference be obtained according to the target temperature obtained and the Current Temperatures of liquid heating, then obtain to need to heat again according to the temperature difference and temperature change value and liquid heating how long can be made to reach target temperature namely obtain the concurrent heating time.Wherein, the concurrent heating time also can adopt empirical value, or (belong to prior art by the method for one or more formula approaching to reality value, repeat no more) obtain, there is error in the concurrent heating time calculated, but can by the temperature stabilization of water in liquid heating in target temperature deviation range.Step S108 is entered after the acquisition concurrent heating time.

S108, controls liquid heating power-off and stops heating.

Generally, control liquid heating and carry out concurrent heating, namely after continuing the heating concurrent heating time, the temperature of the liquid in liquid heating can reach target temperature range, then after the control liquid heating heating concurrent heating time, can control liquid heating power-off and stop heating, heating terminates.

In one embodiment of the invention, in order to prevent liquid heating heat the first Preset Time after make the temperature of liquid be greater than target temperature, control liquid heating carry out preheating first Preset Time before first can carry out judging whether to need to carry out preheating.Before control liquid heating heats the first Preset Time, can also comprise:

S109, the Current Temperatures of liquid in tracer liquid heater.

S110, judges whether the Current Temperatures of liquid in liquid heating is less than the difference of power-off temperature spot and the preset temperature changing value in the first Preset Time and the second Preset Time.

According to the Current Temperatures of the liquid in the liquid heating that step S109 detects, the extent of the Current Temperatures of comparative liquid and power-off temperature spot and the preset temperature changing value in the first Preset Time and the second Preset Time, when the Current Temperatures of liquid is less than power-off temperature spot and the preset temperature changing value in the first Preset Time and the second Preset Time poor, enter step S102, namely control liquid heating and heat the first Preset Time.Otherwise enter step S111, wherein preset temperature changing value can be understood as the maximum temperature change value of liquid in the first Preset Time and the second Preset Time in liquid heating.

S111, when the Current Temperatures of liquid in liquid heating is greater than differing from and being less than target temperature of power-off temperature spot and preset temperature changing value in the first Preset Time and the second Preset Time, calculate the concurrent heating time, and control the liquid heating continuation heating concurrent heating time.

When step S110 judges that the Current Temperatures of liquid in liquid heating is greater than differing from and being less than target temperature of power-off temperature spot and the preset temperature changing value in the first Preset Time and the second Preset Time, liquid then in liquid heating needs to proceed heating just can reach target temperature range, and now the temperature of liquid has been greater than power-off temperature spot, then can directly calculate the concurrent heating time, control liquid heating continue again heating the concurrent heating time temperature of liquid then can be made to reach near target temperature.

In addition, in reality, there is the situation of carrying out again second time heating after some special circumstances have such as just heated immediately, in one embodiment of the invention, after acquisition target temperature, and control before liquid heating heats the first Preset Time, particularly, before judging whether to need to carry out preheating first Preset Time such as before step S110, can also comprise: when the Current Temperatures of liquid and the difference of target temperature are less than or equal to the difference of target temperature and preset temperature changing value, control liquid heating not heat, larger difference may be there is between the temperature of the liquid now detected and actual temperature, need to correct, when the Current Temperatures of liquid and the difference of target temperature are greater than the difference of target temperature and preset temperature changing value, control liquid heating and heat, the difference between the temperature of the liquid now detected and actual temperature is less.In one embodiment of the invention, preset temperature changing value can be 10 DEG C ~ 30 DEG C.Such as, the difference≤target temperature-preset temperature changing value of Current Temperatures-target temperature such as 20 DEG C time, control liquid heating and do not heat; If Current Temperatures-target temperature > target temperature-preset temperature changing value such as 20 DEG C time, control liquid heating heat.

In addition, also can by judging whether the Current Temperatures of liquid stablizes the difference judged with actual temperature, in another embodiment of the present invention, after step silo, namely after detecting the Current Temperatures of the liquid in described liquid heating, can also comprise: judge whether the Current Temperatures of the liquid in liquid heating is in the decline stage, if Current Temperatures is in the decline stage, does not control liquid heating and heat, be judged to differ greatly between the detected temperatures of now liquid and actual temperature, need to correct, if Current Temperatures is in the non-decreasing stage, controls liquid heating and heat, difference between the temperature of the liquid now detected and actual temperature is less.

After acquisition target temperature, do not heat immediately, control liquid heating time-out and first judge whether the detected value of liquid and actual value may there are differences, the generation of special circumstances can be avoided, such as the situation of carrying out again second time heating after just having heated immediately, the temperature that the temperature of the liquid in the liquid heating now detected such as is detected by thermistor may be 80 DEG C, target temperature is also 80 DEG C, and the actual temperature of liquid may be 26 DEG C, now first the detected temperatures value of thermistor and actual temperature value are corrected with regard to needing.

In one embodiment of the invention, above-mentioned liquid heating comprises temperature detector, the temperature value that in the liquid heating that the detected value of temperature detector is detection, the temperature such as thermistor of liquid detects.Carry out in the process of work in control liquid heating, for the liquid heating that can show the temperature of liquid heating, the control method of aforesaid liquid heater can also comprise: inquire about the mapping table that prestores according to temperature change value to correct the detected value of temperature detector.And the detected value of the temperature detector after correction is shown.Wherein, described mapping table can be the one_to_one corresponding table of the difference of the actual temperature of temperature change value and power-off temperature spot and detected value and liquid heating.Wherein, the actual temperature of liquid heating can be the temperature of the liquid by thermometer direct-detection.Particularly, in an embodiment of the present invention, the actual temperature detecting the temperature value of liquid heating and the detected value of temperature detector and the liquid heating obtained can be unequal, but, both need synchronous intensification, and when the same water yield, voltage, environment, both temperature need to there is rational corresponding relation, and corresponding relation can exist the deviation in the several years.There is corresponding corresponding table in the temperature difference of the temperature change value of liquid heating and the detected value of temperature detector that obtain and the actual value of detected value and liquid heating, this correspondence table can obtain through overtesting, and be pre-stored in liquid heating, the temperature value of liquid heating and the detected value of temperature detector detecting acquisition can be corrected according to this correspondence table, according to the temperature change value obtained by inquiry corresponding show to obtain the detected value of temperature detector and the temperature difference of actual value, thus can correct to calculate to detected value the temperature value of acquisition liquid heating more accurately, and then the detected value after correcting is shown, so the real time temperature that user observes the liquid heating of acquisition is more accurately.In another embodiment of the present invention, the control method of aforesaid liquid heater can also correct according to the detected value of following temperature correction formula to temperature detector:

T=current temperature value+M+N;

M=(current temperature value/a) * 2+ current temperature value/b+ current temperature value/c-(current temperature value/d);

N=temperature change value/e+ temperature change value/f+ temperature change value/g; Wherein,

T is the temperature after correction, M and N is temperature correction value, and a, b, c, d, e, f and g are constant.In one particular embodiment of the present invention, each constant can be: a=60, b=70, c=80, d=92, e=8, f=11, g=14.

After by above-mentioned updating formula the temperature value that temperature detector detects being corrected, then show, user can be made to observe heating liquid temperature more accurately.

In another embodiment of the present invention, as shown in Figure 3, after controlling the heating of liquid heating time-out when the temperature of liquid reaches power-off temperature spot in liquid heating, the control method of liquid heating can also comprise:

S112, after liquid heating suspends heating the 3rd Preset Time, judges whether the temperature of liquid in liquid heating reaches target temperature.

When the temperature of liquid heating arrives the power-off temperature spot of step S104 acquisition, liquid heating can be controlled and stop heating, after liquid heating suspends heating, after treating the temperature stabilization of liquid, judge whether the temperature of liquid heating can arrive target temperature, if the temperature of liquid heating reaches target temperature, enters step S113, if the temperature of described liquid heating does not reach described target temperature, enter step S114.

S113, heating terminates.

Namely control liquid heating power-off and stop heating.

S114, obtains the concurrent heating time according to target temperature, temperature change value and Current Temperatures.

If liquid heating is after power-off temperature spot suspends heating, after treating that fluid temperature is stable, or miss the mark temperature, then need to carry out concurrent heating, then according to target temperature, the temperature change value of liquid in the first Preset Time and the second Preset Time and current temperature computation concurrent heating time thereof, and enter step S115.

S115, carries out heating to make the temperature of liquid in liquid heating reach target temperature according to concurrent heating time controling liquid heating.

Calculate the concurrent heating time obtained according to step S114, control liquid heating and heat, the heat time is the described heat time, then the temperature of the liquid in liquid heating can be made to reach target temperature range, and after the concurrent heating time, heating terminates.

In addition, in one embodiment of the invention, the control method of aforesaid liquid heater can also comprise: when heating according to concurrent heating time controling liquid heating, controls liquid heating suspend with carrying out sequence and heat to make the temperature of liquid in liquid heating reach target temperature according to temperature change value.Particularly, when the power-off temperature spot distance objective temperature spot chosen is far away, liquid heating can be controlled and suspend heating at power-off temperature spot, then control liquid heating according to the temperature change value in the first Preset Time and the second Preset Time to continue again to heat Preset Time 1, after heating Preset Time 1, control liquid heating again and suspend heating, after treating liquid heating temperature stabilization, control liquid heating according to temperature change value again and continue heating Preset Time 2, after heating Preset Time 2, control liquid heating and suspend heating cyclic sequence ground like this controls liquid heating and suspends and heat until the temperature of liquid heating arrives near target temperature, then control liquid heating power-off to stop.

Can find out, can there is following several situation in the heating process of aforesaid liquid heater: 1, heat-stop.Namely after control heater carries out heating first Preset Time, control its stop heating then treating the temperature of liquid in liquid heating after, the target temperature of acquisition can be reached.2, heating-time-out-concurrent heating.Namely after control liquid heating carries out heating first Preset Time, suspend heating second Preset Time, and control its stopping heating at power-off temperature spot, but do not reached target temperature by the temperature of liquid heating, after then treating temperature stabilization, control liquid heating and carry out the concurrent heating corresponding time and reach target temperature to make the temperature of liquid heating.3, heating-time-out-heating-time-out-concurrent heating.4, suspend-heating-stop.5, time-out-heating-time-out-concurrent heating.6, heating-time-out-heating-time-out-concurrent heating-time-out-concurrent heating ... stop, time-out-concurrent heating repeats, until target temperature.

In sum, according to the control method of the liquid heating of the embodiment of the present invention, by controlling liquid heating preheating first Preset Time, the error between the detected temperatures value of liquid heating and actual value can be corrected, know temperature stabilization ascent stage simultaneously, and control liquid heating time-out heating second Preset Time, and then the temperature change value of liquid in the first Preset Time and the second Preset Time obtained in described liquid heating, power-off temperature spot is obtained according to temperature change value, and then be less than power-off temperature spot control liquid heating in the heating of time-out temperature spot time-out at the Current Temperatures of liquid, and when liquid Current Temperatures is greater than power-off temperature spot and is less than target temperature, calculate the concurrent heating time, control the liquid heating heating concurrent heating time to reach target temperature, thus the control realized power-off temperature spot, the error of heating liquid temperature and target temperature can be reduced.In liquid heating after power-off temperature spot stops heating, and when it fails to arrive target temperature, the calculating concurrent heating time carries out concurrent heating and reaches target temperature to make liquid heating, can reduce the error of heating liquid temperature and target temperature, carry out temperature control more exactly.

In addition, control liquid heating sequence ground to carry out suspending and heating reaching target temperature to control liquid heating, the detected temperatures value of liquid in liquid heating and the error of actual temperature value can be made to reduce gradually, and then control temperature more exactly.In addition, according to temperature change value, the detected temperatures value of liquid heating and the detected value of temperature detector are corrected, the temperature difference between detected value and actual value can be reduced, and then the temperature value after correcting is shown, make the temperature of display more true and reliable.

The liquid heating proposed according to the embodiment of the present invention is described with reference to the accompanying drawings.

As shown in Figure 4, the liquid heating of the embodiment of the present invention comprises cavity 301, heater (not indicating in figure), arranges device 302, temperature detector 303 and controller 304.Wherein, heater is used for heating liquid, and heater can be positioned at the bottom such as electric kettle of cavity 101, also can be positioned at the position that other can carry out heating.Device 302 is set for Offered target temperature, the surface that device 302 generally can be positioned at cavity 301 is set.Temperature detector 303 is for the temperature of tracer liquid.Controller 304 respectively with device 302 is set, heater is connected with temperature detector 303, controller 304 controller control heater heats the first Preset Time, and after heater heats the first Preset Time, control heater suspends heating second Preset Time and the temperature change value of liquid in the first Preset Time and the second Preset Time obtained in liquid heating, and the power-off temperature spot of heater is obtained according to temperature change value and target temperature, and judge whether the temperature of liquid is less than power-off temperature spot according to Current Temperatures, and when the temperature of liquid is less than power-off temperature spot, control heater continues heating, until the temperature of liquid reaches power-off temperature spot control heater suspend heating.And the Current Temperatures of liquid is greater than power-off temperature spot when being less than target temperature in liquid heating, calculate the concurrent heating time, and control heater continues the heating concurrent heating time, and after the heater heating concurrent heating time, control described liquid heating power-off and stop heating.

Controller 304 is after heater heats the first Preset Time, and control heater suspends heating second Preset Time and the temperature change value of liquid in the first Preset Time and the second Preset Time obtained in liquid heating.Wherein, the second Preset Time can be understood as heater and suspends the heat time, namely stops from controller 304 control heater the time being heated to the temperature stabilization moment of liquid.Particularly, after controller 304 control heater preheating first Preset Time, control heater stops heating, obtain the temperature suspending the moment, to treat in liquid heating the temperature of liquid tend towards stability or stable after obtain its temperature, and calculate the changing value of liquid in the first Preset Time and the second Preset Time.It should be noted that, namely the temperature change value that also can obtain in certain period obtains temperature rise Mean Speed, variations in temperature within certain time period can signify temperature rise Mean Speed, detection once can not represent the temperature rise Mean Speed of liquid heating in the whole heating period of the embodiment of the present invention, but the feature of the temperature variations in certain stage can be reflected, duplicate detection can be carried out to the temperature variations of the heating period of liquid heating as required.

After controller 304 obtains the temperature change value of liquid in the first Preset Time and the second Preset Time, judge whether the temperature of liquid is less than power-off temperature spot according to Current Temperatures, when in liquid heating, the Current Temperatures of liquid is less than power-off temperature spot, then control heater continues heating, when in liquid heating, the temperature of liquid arrives power-off temperature spot, control heater suspends heating, thus can realize controlling liquid heating power-cut time, the error between heating-up temperature and target temperature can be reduced.

In one embodiment of the invention, in order to prevent liquid heating heat the first Preset Time after make the temperature of liquid be greater than target temperature, control liquid heating carry out preheating first Preset Time before first can carry out judging whether to need to carry out preheating.Before liquid heating heats the first Preset Time, the Current Temperatures of liquid in temperature detector 303 tracer liquid heater, controller 304 judges whether the Current Temperatures of liquid in liquid heating is less than the difference of power-off temperature spot and the preset temperature changing value in the first Preset Time and described second Preset Time, and when Current Temperatures is less than power-off temperature spot and preset temperature changing value in the first Preset Time and the second Preset Time poor, control liquid heating to heat, namely control liquid heating and heat the first Preset Time.And when in liquid heating, the Current Temperatures of liquid is greater than differing from and being less than target temperature of power-off temperature spot and preset temperature changing value in the first Preset Time and the second Preset Time, calculate the concurrent heating time, and control the liquid heating continuation heating concurrent heating time.The temperature of liquid can be made to reach near target temperature.

In addition, in reality, there is the situation of carrying out again second time heating after some special circumstances have such as just heated immediately, in one embodiment of the invention, after acquisition target temperature, before liquid heating heats the first Preset Time, when the difference of Current Temperatures and target temperature is less than or equal to target temperature and preset temperature changing value poor, controller 304 controls liquid heating and does not heat, may larger difference be there is between the temperature of the liquid now detected and actual temperature, need to correct; When the difference of Current Temperatures and target temperature is greater than the difference of target temperature and preset temperature changing value, controller 304 controls liquid heating and heats, and the difference between the temperature of the liquid now detected and actual temperature is less.In one embodiment of the invention, preset temperature changing value can be 10 DEG C ~ 30 DEG C.Such as, the difference≤target temperature-preset temperature changing value of Current Temperatures-target temperature such as 20 DEG C time, control liquid heating and do not heat; If Current Temperatures-target temperature > target temperature-preset temperature changing value such as 20 DEG C time, control liquid heating heat.

In addition, also can by judging whether the Current Temperatures of liquid stablizes the difference judged with actual temperature, in another embodiment of the present invention, controller 304 is also for judging whether the Current Temperatures of the liquid in liquid heating is in the decline stage, and be in the decline stage at Current Temperatures and do not control liquid heating and heat, be judged to differ greatly between the detected temperatures of now liquid and actual temperature, need to correct, and be in the non-decreasing stage at Current Temperatures and then control liquid heating and heat, difference between the temperature of the liquid now detected and actual temperature is less.

After acquisition target temperature, do not heat immediately, control liquid heating time-out and first judge whether the detected value of liquid and actual value may there are differences, the generation of special circumstances can be avoided, such as the situation of carrying out again second time heating after just having heated immediately, the temperature that the temperature of the liquid in the liquid heating now detected such as is detected by thermistor may be 80 DEG C, target temperature is also 80 DEG C, and the actual temperature of liquid may be 26 DEG C, now first the detected temperatures value of thermistor and actual temperature value are corrected with regard to needing.In one embodiment of the invention, controller 304 can inquire about the mapping table that prestores to correct the detected value of temperature detector 303 according to temperature change value.Wherein, described mapping table can be the one_to_one corresponding table of the difference of the actual temperature of liquid in temperature change value and power-off temperature spot and detected value and liquid heating.Wherein, in liquid heating, the actual temperature of liquid can by the temperature of the liquid of thermometer direct-detection.Particularly, in an embodiment of the present invention, in the liquid heating obtained there is corresponding corresponding table to the temperature difference of the actual value of liquid in power-off temperature spot and detected value and liquid heating in the temperature change value of liquid, this correspondence table can obtain through overtesting, and be pre-stored in the controller 304 of liquid heating, correct according to the temperature value of liquid in the liquid heating that this correspondence table can obtain detection and the detected value of temperature detector 303, the detected value of temperature detector 303 and the temperature difference of actual value can be obtained by the corresponding table of inquiry according to the temperature change value obtained, thus can correct to calculate the acquisition temperature value of liquid in liquid heating more accurately to detected value.

Further, as shown in Figure 5, aforesaid liquid gradually thermal can also comprise display 401, and display 401 is connected with controller 304, for showing the detected value of the temperature detector 303 after correction.Carry out in the process of work at controller 304 control heater, for the liquid heating that can show the temperature in liquid heating heating process, by display 401, temperature value can be shown, and the temperature value that display 401 shows is the detected temperatures value of the temperature detector 303 after overcorrect, more close to the actual temperature of liquid, more accurately.

In another embodiment of the present invention, controller 304 can also correct according to the detected value of following temperature correction formula to temperature detector:

T=current temperature value+M+N, wherein,

M=(current temperature value/a) * 2+ current temperature value/b+ current temperature value/c-(current temperature value/d),

N=temperature change value/e+ temperature change value/f+ temperature change value/g,

T is the temperature after correction, M and N is temperature correction value, and a, b, c, d, e, f and g are constant.In one particular embodiment of the present invention, each constant can be: a=60, b=70, c=80, d=92, e=8, f=11, g=14.

After by above-mentioned updating formula the temperature value that temperature detector 303 detects being corrected, then shown by display 401, user can be made to observe heating liquid temperature more accurately.

In addition, after controller 304 obtains the temperature change value of liquid in the first Preset Time and the second Preset Time, in liquid heating, the temperature of liquid reaches power-off temperature spot, after controller 304 control heater suspends heating, and after heater suspends heating the 3rd Preset Time, controller 304 judges whether the temperature of liquid reaches target temperature, and when the temperature miss the mark temperature of liquid, according to target temperature, temperature change value and Current Temperatures obtain the concurrent heating time, and carry out heating to make the temperature of liquid to reach target temperature according to concurrent heating time controling heater.Particularly, after controller 304 obtains the temperature change value of liquid in the first Preset Time and the second Preset Time, then obtain to need to heat again according to Current Temperatures, target temperature and temperature change value and liquid heating how long can be made to reach target temperature namely obtain the concurrent heating time.Wherein, the concurrent heating time also can adopt empirical value, or (belong to prior art by the method for one or more formula approaching to reality value, repeat no more) obtain, there is error in the concurrent heating time calculated, but can by the temperature stabilization of water in liquid heating in target temperature deviation range.Controller 304 continues heating according to the concurrent heating time controling heater obtained, and after heater continues the heating concurrent heating time, the temperature of liquid can reach near target temperature, thus make to control the temperature of liquid more accurate.

In one embodiment of the invention, when controller 304 heats according to concurrent heating time controling heater, controller 304 is also for suspending according to temperature change value control heater sequence and heat to make the temperature of liquid in described liquid heating reach target temperature.Particularly, controller 304 is when the power-off temperature spot distance objective temperature spot chosen is far away, heating can be suspended by control heater at power-off temperature spot, then continue again to heat Preset Time 1 according to temperature change value control heater, after heating Preset Time 1, control heater suspends heating again, after treating the temperature stabilization of liquid in liquid heating, heating Preset Time 2 is continued again according to temperature change value control heater, after heating Preset Time 2, control liquid heating and suspend heating cyclic sequence ground like this control heater suspends and heats until the temperature of liquid arrives near target temperature in liquid heating, then the power-off of controller 304 control heater stops.

In one embodiment of the invention, temperature detector 303 can be positioned at the inside of cavity 301 as shown in Figure 4, temperature detector 303 and the liquid comes into contact in cavity 301.In another embodiment of the present invention, temperature detector 303 also can be arranged on the outer wall of cavity 301.Particularly, temperature detector 303 can be positioned at the inside of cavity 101, and namely temperature detector 303 directly contacts with the liquid in cavity 301, direct-detection fluid temperature.In addition, temperature detector 303 can also obtain the temperature of liquid indirectly, such as, temperature detector 303 contacts with cavity 301 wall (can be outer wall), and the liquid comes into contact not directly and in cavity 301, the temperature of liquid is indirectly obtained by the temperature detecting wall, reach detected temperatures equally, control the object of fluid temperature, but, during by the temperature that indirectly obtains liquid, need the temperature of the detected position of the outer wall ensureing cavity 301, synchronously heat up with the temperature of liquid in cavity 301, in other words, cavity 301 is detected the temperature of position and fluid temperature can exist the temperature difference, but in the same water yield, under the environment such as voltage, there is rational corresponding relation in both temperature, the deviation in preset temperature range can be there is in corresponding relation.Such as, the variations in temperature that cavity 301 is detected temperature every 20S within a period of time such as 2 minutes of position is 8 DEG C, accordingly fluid temperature at this moment between in section the variations in temperature of every 20S be 5 DEG C, be then detected the temperature of position and fluid temperature exists corresponding relation this section of time period inner chamber body 301.

It should be noted that, the liquid heating of the embodiment of the present invention is not limited to electric kettle product, situation measuring tempeature being controlled to certain parameter can be suitable for, such as water heater, storage-type electric water heater is in like manner to boil water with kettle, and the water heater namely burnt namely can be controlled subsequent time period temperature by the variations in temperature in the time period of measurement, by that analogy, the variations in temperature of a time period in repeated measurement, then can carry out control temperature more exactly to subsequent time period.

In sum, according to the liquid heating of the embodiment of the present invention, controller control heater preheating first Preset Time, the error between the detected temperatures value of liquid heating and actual value can be reduced, obtain temperature stabilization ascent stage simultaneously, and control liquid heating time-out heating second Preset Time, and then the liquid that obtains in described liquid heating obtains temperature change value at the first Preset Time and the second Preset Time, power-off temperature spot is obtained according to temperature change value, when Current Temperatures is less than power-off temperature spot, controller controls liquid heating and suspends heating at power-off temperature spot, and when Current Temperatures is greater than power-off temperature spot and is less than target temperature point, calculate the concurrent heating time to control liquid heating arrival target temperature.Thus the control realized power-off temperature spot, the error of heating liquid temperature and target temperature can be reduced.Controller control heater is after power-off temperature spot stops heating, when it fails to arrive target temperature, the calculating concurrent heating time carries out concurrent heating and reaches target temperature to make liquid heating, can reduce the error of heating liquid temperature and target temperature, carry out temperature control more exactly.

In addition, controller controls heater sequence ground to carry out suspending and heating reaching target temperature to control fluid temperature, and the detected temperatures value of temperature detector and the error of actual temperature value can be made to reduce gradually, and then control temperature more exactly.In addition, correct according to the detected temperatures value of temperature change value to temperature detector, the temperature difference between detected value and actual value can be reduced, and then the temperature value after correction shows by display, make the temperature of display more true and reliable.

Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.

In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random-access memory (ram), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.

Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.

Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.

Each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.

The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.

In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.

Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.

Claims (22)

1. a control method for liquid heating, is characterized in that, comprises the following steps:

Obtain target temperature;

Control described liquid heating and heat the first Preset Time;

After described liquid heating heats the first Preset Time, control described liquid heating and suspend heating second Preset Time, and obtain the temperature change value of liquid in described first Preset Time and described second Preset Time in described liquid heating;

The power-off temperature spot of described liquid heating is obtained according to described temperature change value and described target temperature;

Judge whether the Current Temperatures of liquid in described liquid heating is less than described power-off temperature spot; And

When in described liquid heating, the Current Temperatures of liquid is less than described power-off temperature spot, control described liquid heating and continue heating, until control described liquid heating when the temperature of liquid reaches described power-off temperature spot in described liquid heating to suspend heating;

When the Current Temperatures of liquid in described liquid heating be greater than described power-off temperature spot be less than described target temperature time, calculate the concurrent heating time, and control described liquid heating continue heating the described concurrent heating time; And

After liquid heating heats the described concurrent heating time, control described liquid heating power-off and stop heating.

2. the control method of liquid heating as claimed in claim 1, is characterized in that, before the described liquid heating of control heats the first Preset Time, also comprises:

Detect the Current Temperatures of liquid in described liquid heating;

Judge whether the Current Temperatures of liquid in described liquid heating is less than the difference of described power-off temperature spot and the preset temperature changing value in described first Preset Time and described second Preset Time;

If so, then control described liquid heating and heat the first Preset Time; And

When the Current Temperatures of liquid in described liquid heating is more than or equal to differing from and being less than described target temperature of described power-off temperature spot and preset temperature changing value in described first Preset Time and described second Preset Time, calculate the concurrent heating time, and control the described liquid heating continuation heating concurrent heating time.

3. the control method of liquid heating as claimed in claim 2, is characterized in that, after acquisition target temperature, and controls before described liquid heating heats the first Preset Time, also to comprise:

When the difference of described Current Temperatures and described target temperature is less than or equal to the difference of described target temperature and preset temperature changing value, controls described liquid heating and do not heat;

When the difference of described Current Temperatures and described target temperature is greater than the difference of described target temperature and preset temperature changing value, controls described liquid heating and heat.

4. the control method of liquid heating as claimed in claim 3, it is characterized in that, described preset temperature changing value is 10 DEG C ~ 30 DEG C.

5. the control method of liquid heating as claimed in claim 3, is characterized in that, after detecting the Current Temperatures of the liquid in described liquid heating, also comprise:

Judge whether the Current Temperatures of the liquid in described liquid heating is in the decline stage;

If described Current Temperatures is in the decline stage, does not control described liquid heating and heat; And

If described Current Temperatures is in the non-decreasing stage, controls described liquid heating and heat.

6. the control method of liquid heating as claimed in claim 1, is characterized in that, after controlling the heating of described liquid heating time-out, also comprises when the temperature of liquid reaches described power-off temperature spot in described liquid heating:

After described liquid heating suspends heating the 3rd Preset Time, judge whether the temperature of liquid in described liquid heating reaches described target temperature;

If the temperature of liquid reaches described target temperature in described liquid heating, then control described liquid heating power-off and stop heating;

If the temperature of liquid does not reach described target temperature in described liquid heating, obtain the described concurrent heating time according to described target temperature, described temperature change value and described Current Temperatures; And

According to described concurrent heating time controling, liquid heating carries out heating to make the temperature of liquid in described liquid heating reach described target temperature.

7. the control method of liquid heating as claimed in claim 6, is characterized in that, also comprise:

When liquid heating heats according to described concurrent heating time controling, control described liquid heating according to described temperature change value and suspend with carrying out sequence and heat to make the temperature of liquid in described liquid heating reach described target temperature.

8. the control method of liquid heating as claimed in claim 5, it is characterized in that, described liquid heating comprises temperature detector, and described control method also comprises:

The mapping table that prestores is inquired about to correct the detected value of described temperature detector according to described temperature change value, wherein, described mapping table is the one_to_one corresponding table of difference of actual temperature of described temperature change value, described power-off temperature spot and described detected value and described liquid heating.

9. the control method of liquid heating as claimed in claim 5, it is characterized in that, described liquid heating comprises temperature detector, and described control method also comprises: correct according to the detected value of following temperature correction formula to described temperature detector:

T=current temperature value+M+N; Wherein,

M=(current temperature value/a) * 2+ current temperature value/b+ current temperature value/c-(current temperature value/d);

N=temperature change value/e+ temperature change value/f+ temperature change value/g;

T is the temperature after correction, M and N is temperature correction value, and a, b, c, d, e, f and g are constant.

10. the control method of liquid heating as claimed in claim 8 or 9, is characterized in that, also comprise:

The detected value of the described temperature detector after correction is shown.

11. 1 kinds of liquid heating, is characterized in that, comprising:

Cavity;

Offered target temperature device is set, described the surface that device is positioned at described cavity is set;

For the heater heated;

Temperature detector, described temperature detector is used for tracer liquid temperature;

Controller, described controller arranges device with described respectively, described heater is connected with described temperature detector, described controller controls described heater and heats the first Preset Time, and after described heater heats the first Preset Time, control described heater suspend heating second Preset Time and obtain the temperature change value of described liquid in described first Preset Time and described second Preset Time, and the power-off temperature spot of described heater is obtained according to described temperature change value and described target temperature, and judge whether the temperature of described liquid is less than described power-off temperature spot according to Current Temperatures, and when the temperature of described liquid is less than described power-off temperature spot, control described heater and continue heating, until the temperature of described liquid reaches described power-off temperature spot control the heating of described heater time-out, and the Current Temperatures of liquid is greater than described power-off temperature spot when being less than described target temperature in liquid heating, calculate the concurrent heating time, and control the described heater continuation heating described concurrent heating time, and after heater heats the described concurrent heating time, control described liquid heating power-off and stop heating.

12. liquid heating as claimed in claim 11, it is characterized in that, before described liquid heating heats the first Preset Time, described temperature detector detects the Current Temperatures of liquid in described liquid heating, described controller judges whether the Current Temperatures of liquid in described liquid heating is less than the difference of described power-off temperature spot and the preset temperature changing value in described first Preset Time and described second Preset Time, and when described Current Temperatures is less than described power-off temperature spot and preset temperature changing value in described first Preset Time and described second Preset Time poor, control described liquid heating to heat, and when in described liquid heating, the Current Temperatures of liquid is greater than differing from and being less than described target temperature of described power-off temperature spot and preset temperature changing value in described first Preset Time and described second Preset Time, calculate the concurrent heating time, and control the described liquid heating continuation heating concurrent heating time.

13. liquid heating as claimed in claim 12, it is characterized in that, before described liquid heating heats the first Preset Time, when the difference of described Current Temperatures and described target temperature is less than or equal to described target temperature and preset temperature changing value poor, described controller controls described liquid heating and does not heat; When the difference of described Current Temperatures and described target temperature is greater than the difference of described target temperature and preset temperature changing value, described controller controls described liquid heating and heats.

14. liquid heating as claimed in claim 13, is characterized in that, described preset temperature changing value is 10 DEG C ~ 30 DEG C.

15. liquid heating as claimed in claim 13, it is characterized in that, described controller is also for judging whether the Current Temperatures of the liquid in described liquid heating is in the decline stage, and be in the decline stage at described Current Temperatures and do not control described liquid heating and heat, and be in the non-decreasing stage at described Current Temperatures and then control described liquid heating and heat.

16. liquid heating as claimed in claim 11, it is characterized in that, in described liquid heating, the temperature of liquid reaches described power-off temperature spot, after described controller controls the heating of described heater time-out, and after described heater suspends heating the 3rd Preset Time, described controller judges whether the temperature of described liquid reaches described target temperature, and when the temperature of described liquid does not reach described target temperature, according to described target temperature, described temperature change value and described Current Temperatures obtain the described concurrent heating time, and heater carries out heating to make the temperature of described liquid reach target temperature according to described concurrent heating time controling.

17. liquid heating as claimed in claim 16, it is characterized in that, when according to described concurrent heating time controling, heater heats, described controller also suspends for controlling described heater according to described temperature change value and heats to make the temperature of liquid in described liquid heating reach described target temperature with carrying out sequence.

18. liquid heating as claimed in claim 11, it is characterized in that, described temperature detector is positioned at the inside of described cavity, the liquid comes into contact in described temperature detector and described cavity.

19. liquid heating as claimed in claim 11, it is characterized in that, described temperature detector is arranged on the outer wall of described cavity.

20. liquid heating as claimed in claim 15, it is characterized in that, described controller is also for inquiring about the mapping table that prestores to correct the detected value of described temperature detector according to described temperature change value, wherein, described mapping table is the one_to_one corresponding table of the difference of the actual temperature of liquid in described temperature change value, described power-off temperature spot and described detected value and described liquid heating.

21. liquid heating as claimed in claim 15, it is characterized in that, described controller corrects according to the detected value of following temperature correction formula to described temperature detector:

T=current temperature value+M+N; Wherein,

M=(current temperature value/a) * 2+ current temperature value/b+ current temperature value/c-(current temperature value/d);

N=temperature change value/e+ temperature change value/f+ temperature change value/g;

T is the temperature after correction, M and N is temperature correction value, and a, b, c, d, e, f and g are constant.

22. liquid heating as described in claim 20 or 21, is characterized in that, also comprise:

Display, described display is connected with described controller, for showing the detected value of the described temperature detector after described correction.