CN101831781B - Automatic drying method of drum washing machine - Google Patents
Automatic drying method of drum washing machine Download PDFInfo
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- CN101831781B CN101831781B CN2009100472942A CN200910047294A CN101831781B CN 101831781 B CN101831781 B CN 101831781B CN 2009100472942 A CN2009100472942 A CN 2009100472942A CN 200910047294 A CN200910047294 A CN 200910047294A CN 101831781 B CN101831781 B CN 101831781B
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Abstract
The invention relates to an automatic drying method of a drum washing machine, which comprises the following steps: detecting the temperature T1 of a first temperature sensor in an air duct, detecting the temperature value T2 of a second temperature sensor in a drum, calculating the difference delta T between the two, calculating the slope of the delta T when the running time is larger than or equal to the set time 1, stopping heating during the drying process when the delta T is large than the limit value 1 delta Tmax and T1 is larger than the limit value 2 under the situation that the slope of the delta T is larger than the set value 1, and starting to cool till the end; or calculating the difference sigma between the temperature difference delta T and average value delta T0, stopping heating during the drying process if the order n that the sigma is larger than the reference value sigma 0 achieves the reference value n0 or the running time is larger than the set time 2, and starting to cool till the end. The automatic drying method can lead the judgment of drying to be more precise, lead the drying of clothes to be appropriate and prevent the clothes from being not dry or too dry during the drying.
Description
Technical field
The invention belongs to household appliance technical field, relate to washing machine, especially the automatic drying method of roller washing machine.
Background technology
The furnace drying method of existing roller washing machine is, through air blast 11 cylindric washer and a air in the tube that is filled with water sucked condenser 12 and adds hot-flow flue 13, gets back to then in cylindric washer and the tube that is filled with water; Thereby the formation circulating current when airflow passes adds hot-flow flue 13, is heated by heater; After getting into cylindric washer, the moisture on the clothing is evaporated by hot-air, gets into condenser 12 thereby form moist air-flow; After moisture is condensed in condenser 12; Again sent into by air blast 11 and add hot-flow flue 13 heating, so circulation, thereby the function of realization drying clothes.
This method is generally carried out through setting fixing drying time, and in this process, through detecting hot air temperature, the start-stop of control heating tube moves in circles, thereby keeps the interior temperature of cylindric washer in suitable scope, final drying clothes.
Although have the regularly function of oven dry now, can realize the purpose of drying clothes, because drying procedure adopts the method for timing oven dry; The user is difficult to the correct needed time of drying clothes of estimating; Often occurrence timing is too short, and clothing is oven dry not, and is perhaps regularly long; Clothing dry by the fire overdrying, even the situation of damage user clothing.
The patent No. of existing Lejin Electronic and Electric Appliance Co Ltd (Tianjin) application is respectively the automatic drying method of 200410072481.3,200410072480.9 washing machine; It comprises the temperature detection value of the 2nd temperature sensor that inner the 1st temperature sensor of washing machine drum and oven dry air channel are inner, and calculates the difference of two temperature.Can be divided into 3 stages, the 1st stage drying system internal temperature fast rise, the 2nd phase temperature detected value slowly rises, and temperature gap remains unchanged, the 3rd phase temperature difference fast rise.Through real-time detection, thereby the degree of drying of clothing is made judgement, the stroke and the operation of decision oven dry to said temperature detected value and temperature gap.
Said method has proposed the variation of washing machine internal temperature and there is certain correlation in humidity; But in fact because the washing machine environment for use is complicated; Above-mentioned rule only just is suitable under specific circumstances, can't under various complex situations, make right judgement by the degree of drying to washing machine.
Summary of the invention
The object of the present invention is to provide a kind of automatic drying method of roller washing machine; Automatically regulate the oven dry degree through real-time detected temperatures; Short baking of the time of solve adopting regularly oven dry to cause is not easily done or time robe thing dry by the fire overdrying, even the situation of damage clothing.
For reaching above purpose, the solution that the present invention adopted is:
A kind of automatic drying method of roller washing machine, it may further comprise the steps:
1) to being arranged at the temperature value T of the 1st temperature sensor in the air channel
1, be arranged at the temperature value T of the 2nd temperature sensor in the cylinder
2Sampling, accounting temperature difference DELTA T, Δ T=T
1-T
2
2) judge whether reached setting-up time 1 running time, if not, return step 1);
3) if step 2) in the result for being, the slope of calculating Δ T, whether the slope of judging Δ T less than setting value 1;
4a), if not, return step 1) if whether the result judges Δ T greater than limit value 1 for not in the step 3);
5a) if step 4a) in the result for being judgement T
1Whether, if not, return step 1),, get into cooling, until end if drying course stops heating greater than limit value 2;
4b) if the result is for being the average Δ T of calculating Δ T in the step 3)
0And oven dry criterion σ=Δ T-Δ T
0, judge that σ is greater than reference value σ
0Frequency n whether reached reference value n
0If,, drying course stops heating, gets into cooling, until end;
5b) if step 4b) in the result for not, whether judge running time greater than setting-up time 2, if not, return step 1), if drying course stops heating, get into and cool off, until end.
Further, if step 5a) in, the detected value T of the 1st temperature sensor
1Reach the maximum temperature limits value, heater gets into the discontinuous power supply heated condition, calculates T
1The climbing speed v from the temperature low spot to height point and the difference sigma of real-time temperature difference and average are if v is greater than reference value v
0, and σ is greater than reference value σ
1, then drying course stops heating, gets into cooling, until end; Otherwise return step 1) and continue to move to the end of 5b condition.
Be meant that drying stroke begins the time that the back is write down till the current state this running time; 1 of setting-up time is the start-up time of rule of thumb setting; Setting-up time 2 is the longest drying time=oven-dry weight * λ, and λ is an empirical coefficient.
The 1st temperature sensor is installed on the exit that adds hot-flow flue, the inlet or the exit of condenser; The 2nd temperature sensor is installed on bottom or the side, top, at the back of cylinder; Should keep suitable space length between two temperature sensors; This space length is relevant with the concrete washing machine structure of using, and can confirm through test, and evaluation criterion is to reflect the above-mentioned characteristic that this algorithm needs.
Owing to adopted such scheme, the present invention to have following characteristics: automatic drying method of the present invention is more accurate for the judgement of oven dry, makes to prevent not doing or overdrying when clothing is dried by the appropriate of clothing oven dry.
Description of drawings
Fig. 1 is the structural representation of prior art roller washing machine.
Fig. 2 is the sketch map of the embodiment of the invention.
Fig. 3 is a flow chart of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the present invention is further described.
Because it is inner at washing machine; Exist steam heat of vaporization and heater to add the variation relation between the hot merit; After system gets into oven-dried condition; When being in than stability between the heat of vaporization of steam and the electrical heating power, this moment, the heater electrical power mainly was converted into the heat of vaporization of water, thereby constant basically through the steam temperature behind the heater.When clothing in the system was dried, water vapour content significantly reduced, and electrical power can not be fully by the water vapor heat absorption, and variations in temperature is violent when having caused oven dry to finish.Thus, can the whole drying system of matching Design, strengthen the above-mentioned characteristic of drying system, and detect above-mentioned characteristic in good time, reach the purpose of intelligent decision oven dry degree.
Roller washing machine of the present invention comprises the 1st temperature sensor the 1, the 2nd temperature sensor 2, adds hot-flow flue 3, heater 4, air blast 5, inner/outer tube 6; Its control method of drying automatically detects the variations in temperature of drying system air channel and drum; Through the correlation of clothing degree of drying in accounting temperature variation and the cylinder, reach the purpose of real-time judgement oven dry degree.This control method comprises 3 stages, and 1 begins to dry the back temperature changes the phase fast, inner evaporation of 2 drying systems and condensation relatively stable period, and the temperature when 3 oven dry finish changes the phase fast.
The present invention realizes oven dry control automatically through the temperature sensor senses temperature, and its temperature comprises the temperature value T of the 1st temperature sensor 1 in the air channel 3
1, the temperature value T of the 2nd temperature sensor 2 in the cylinder 6
2
Before the 1st stage, need to judge earlier the weight of the clothing of oven dry, as the reference of whole drying time, the longest drying time=oven-dry weight * λ, λ are empirical coefficient, it need be confirmed through experiment.(according to the baking test method of industry standard, carry out other oven dry test of each load weight level, draw empirical coefficient λ through regression analysis then) the longest drying time is definite as the weight householder method simultaneously, is setting-up time 2,
In the 1st stage, the temperature of the 1st temperature sensor and the 2nd temperature sensor is monitored, and calculate T
1, T
2Both differences are designated as Δ T.When running time during, calculate Δ T slope more than or equal to setting-up time 1.If under Δ T slope＞setting value 1 situation, Δ T＞limit value 1 Δ T
Max, and T
1＞limit value 2, drying course stop heating, get into cooling, until end.This situation explanation, oven dry amount seldom perhaps do not have drying clothes.Be meant that wherein drying stroke begins the time that the back is write down till the current state running time; 1 of setting-up time is the start-up time of rule of thumb setting, because in the washing machine drying course, even under the empty tubbiness attitude; Get into the state that this method can be judged; Also need reach certain hour, so, set setting-up time 1 here in order to prevent abnormality.Setting value 1 is to characterize for the 1st stage to finish the characteristic quantity that begins with the 2nd stage, need choose rational value through test, and in general this value is approaching or equal zero.
The slope of Δ T is the crucial reference value after getting into this method decision state, is used for distinguishing 1 stage of oven dry and 2 stages, and setting value 1 is a criterion; If Δ T slope＞setting value 1; Explain also to be in 1 stage (temperature changes fast), if Δ T slope＜setting value 1 is explained 2 stages that were in.
Mainly temperature is monitored in the 2nd stage, T gets average to the temperature gap Δ, is designated as Δ T
0Detect simultaneously and accounting temperature difference DELTA T and average Δ T
0Difference sigma.
If σ is greater than reference value σ
0, got into for the 3rd stage.In the 3rd stage, continue to detect and accounting temperature difference DELTA T and average Δ T
0Difference sigma, if σ is greater than reference value σ
0Frequency n reached reference value n
0, when perhaps running time was greater than setting-up time 2, then drying course stopped heating, got into cooling, until end.
Special, do not damaged in order to guarantee clothing by excessive temperature, need detected value T with reference to the 1st temperature sensor
1, heater is controlled, when reaching maximum temperature limits value (detected value T at this moment,
1Correspondence has limit value 2) time, need close heater, the stability in original like this 2 stages can be broken, and causes original method to lose efficacy.This situation occurs when user's environment for use is more special, so only as the additional correction of this routine furnace drying method.Thereby in the 2nd, 3 phase process; Because the difference of oven dry environment for use, the variations in temperature characteristic in above-mentioned the 2/3rd stage possibly can't observe owing to dry maximum temperature restriction in the bucket; But get into heater discontinuous power supply state heated; At this moment can calculate the climbing speed v of the 1st temperature sensor, calculate the difference sigma of real-time temperature difference and average simultaneously, if v is greater than reference value v from the temperature low spot to height point
0, σ is greater than reference value σ simultaneously
1, then drying course stops heating, gets into cooling, until end.
The 1st temperature sensor 1 that is provided with in the 2nd temperature sensor 2 that described drum is provided with and the air channel; Can carry out the selection of mounting points according to the concrete needs of product during practical implementation; Can be installed in the exit that adds hot-flow flue, the inlet or the exit of condenser such as the 1st temperature sensor 1; The 2nd temperature sensor 2 can be installed in bottom or the side, top, at the back of cylinder, but two temperature sensors should keep suitable space length, and this space length is relevant with the washing machine structure of concrete application; Can confirm that evaluation criterion is to reflect the above-mentioned characteristic that this algorithm needs through test.For example the 1st temperature sensor 1 is installed in heating during ducting outlet, the 2nd temperature sensor 2 just should be installed in the cylinder bottom, and should not be installed in the cylinder top or sidepiece near hot-blast outlet.
In general, because roller washing machine all has the water heating function, and the temperature sensor of water heating is positioned at cylinder bottom, can directly be used as the 2nd temperature sensor 2.If the oven dry part has been used temperature sensor control temperature in inside, air channel, can directly use this temperature sensor as the 1st temperature sensor 1.
Consider more accurate oven dry control requirement; Also can be in the inner reference of selecting more temperature detecting point as control logic of drying system; The cited temperature detecting point of this method also is not limited to position shown in the figure simultaneously; Can in whole drying system, select to best embody the test point that temperature and humidity changes correlation according to the needs of real system.
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (4)
1. the automatic drying method of a roller washing machine, it is characterized in that: it may further comprise the steps:
1) to being arranged at the temperature value T of the 1st temperature sensor that heats the ducting outlet place
1, be arranged at the temperature value T of the 2nd temperature sensor in the cylinder
2Sampling, accounting temperature difference DELTA T, Δ T=T
1-T
2Keep suitable space length between said the 1st temperature sensor and said the 2nd temperature sensor, said space length is relevant with the concrete washing machine structure of using, and need confirm through test;
2) judge whether reached setting-up time 1 running time, if not, return step 1);
3) if step 2) in the result for being, the slope of calculating Δ T, whether the slope of judging Δ T less than setting value 1;
4a), if not, return step 1) if whether the result judges Δ T greater than limit value 1 for not in the step 3);
5a) if step 4a) in the result for being judgement T
1Whether, if not, return step 1),, get into cooling, until end if drying course stops heating greater than limit value 2;
4b) if the result is for being the average Δ T of calculating Δ T in the step 3)
0And oven dry criterion σ=Δ T-Δ T
0, judge that σ is greater than reference value σ
0Frequency n whether reached reference value n
0If,, drying course stops heating, gets into cooling, until end;
5b) if step 4b) in the result for not, whether judge running time greater than setting-up time 2, if not, return step 1), if drying course stops heating, get into and cool off, until end.
2. the automatic drying method of roller washing machine as claimed in claim 1 is characterized in that: if step 5a) in, the detected value T of the 1st temperature sensor
1Reach the maximum temperature limits value, heater gets into the discontinuous power supply heated condition, calculates T
1The climbing speed v from the temperature low spot to height point and the difference sigma of real-time temperature difference and average are if v is greater than reference value v
0, and σ is greater than reference value σ
1, then drying course stops heating, gets into cooling, until end; Otherwise continuing to move to the 5b condition finishes.
3. the automatic drying method of roller washing machine as claimed in claim 1 is characterized in that: be meant that drying stroke begins the time that the back is write down till the current state this running time; 1 of setting-up time is the start-up time of rule of thumb setting; Setting-up time 2 is the longest drying time=oven-dry weight * λ, and λ is an empirical coefficient.
4. the automatic drying method of roller washing machine as claimed in claim 1, it is characterized in that: the 1st temperature sensor is installed on the exit that adds hot-flow flue; The 2nd temperature sensor is installed on the bottom of cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100472942A CN101831781B (en) | 2009-03-10 | 2009-03-10 | Automatic drying method of drum washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100472942A CN101831781B (en) | 2009-03-10 | 2009-03-10 | Automatic drying method of drum washing machine |
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| Publication Number | Publication Date |
|---|---|
| CN101831781A CN101831781A (en) | 2010-09-15 |
| CN101831781B true CN101831781B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100472942A Active CN101831781B (en) | 2009-03-10 | 2009-03-10 | Automatic drying method of drum washing machine |
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Families Citing this family (12)
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|---|---|---|---|---|
| CN102517861B (en) * | 2011-12-19 | 2017-09-26 | 青岛海尔滚筒洗衣机有限公司 | Clothes drying temperature detection control method and dryer |
| CN102677433B (en) * | 2012-03-16 | 2017-11-24 | 青岛海尔滚筒洗衣机有限公司 | Washing machine inflow determination methods and its washing machine |
| CN102644311B (en) * | 2012-04-05 | 2015-09-23 | 浙江怡和卫浴有限公司 | The furnace drying method of intelligent water toilet pan drying system |
| CN105088726B (en) * | 2015-05-29 | 2018-03-16 | 无锡小天鹅股份有限公司 | The drying control method of washing machine and washing machine |
| WO2017004450A1 (en) | 2015-07-02 | 2017-01-05 | The Regents Of The University Of California | Self-calibrating automatic controller to determine end of cycle and track dryer cycle efficiency |
| CN107620193B (en) * | 2016-07-15 | 2021-02-02 | 青岛海尔滚筒洗衣机有限公司 | Drying time control method for washing and drying integrated machine |
| CN106245265B (en) * | 2016-08-26 | 2018-07-20 | 苏州三星电子有限公司 | A kind of washing machine automatic drying method |
| CN109023829B (en) * | 2018-08-15 | 2020-12-22 | 广东格兰仕集团有限公司 | Automatic drying method of washing machine |
| CN112481978B (en) * | 2020-11-20 | 2022-01-25 | 珠海格力电器股份有限公司 | Clothes drying equipment, drying control method and device thereof, and storage medium |
| CN112481977B (en) * | 2020-11-20 | 2022-05-27 | 珠海格力电器股份有限公司 | Clothes drying equipment, drying control method and device thereof, and storage medium |
| CN112538719B (en) * | 2020-11-27 | 2022-08-05 | 长虹美菱股份有限公司 | Method for judging faucet switch in drying process of washing machine |
| CN114182507B (en) * | 2021-11-30 | 2022-07-26 | 珠海格力电器股份有限公司 | Drying and wrinkle removing method and washing and drying integrated machine |
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| EP0329922A3 (en) * | 1988-02-22 | 1990-06-20 | American Dryer Corporation | Apparatus and method for controlling a drying cycle of a clothes dryer |
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