CN115748207A

CN115748207A - Control method of clothes dryer and clothes dryer

Info

Publication number: CN115748207A
Application number: CN202211502341.XA
Authority: CN
Inventors: 于彩侠; 李鸿鹏
Original assignee: TCL Home Appliances Hefei Co Ltd
Current assignee: TCL Home Appliances Hefei Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-03-07

Abstract

The application provides a control method of a clothes dryer and the clothes dryer, wherein the control method comprises the following steps: in the drying stage of the clothes dryer, heating clothes to be dried in an inner cylinder of the clothes dryer; acquiring the temperature change rate in the inner drum and the weight of the clothes in the inner drum; and judging whether to dehydrate the clothes to be dried according to the temperature change rate and the weight of the clothes. In the drying stage, the temperature change rate in the inner barrel can be obtained according to the temperature in the inner barrel and the heating duration, the moisture content of the clothes is determined, and whether the moisture content is accurate or not is determined according to the weight of the clothes, so that the accuracy of judging the moisture content of the clothes is improved, the accuracy of judging the dryness of the clothes is further improved, and the drying efficiency of the clothes is improved.

Description

Control method of clothes dryer and clothes dryer

Technical Field

The application belongs to the technical field of clothes dryers, and particularly relates to a control method of a clothes dryer and the clothes dryer.

Background

With the progress and development of society, the pursuit of people on the quality of life is gradually improved, and the trouble that the traditional clothes airing is time-consuming and labor-consuming and the occupied space is taken out is avoided due to the appearance of the clothes dryer, so that the clothes can be taken out and worn or put in conveniently.

However, the existing dryer has a long drying time, resulting in low drying efficiency of the dryer.

Disclosure of Invention

The embodiment of the application provides a control method of a clothes dryer and the washing machine, which can improve drying judgment accuracy to reduce the drying time of the clothes dryer and further improve the drying efficiency of the clothes dryer.

The embodiment of the application provides a control method of a clothes dryer, which comprises the following steps:

in the drying stage of the clothes dryer, heating clothes to be dried in an inner drum of the clothes dryer;

acquiring the temperature change rate in the inner drum and the weight of the clothes in the inner drum;

and judging whether to dehydrate the clothes to be dried according to the temperature change rate and the clothes weight.

Optionally, the determining whether to dehydrate the laundry to be dried according to the temperature change rate and the laundry weight includes:

and when the temperature change rate is smaller than a set change rate and the weight of the clothes is larger than a set weight, dehydrating the clothes to be dried.

Optionally, when the temperature change rate is smaller than a set change rate and the weight of the laundry is greater than a set weight, dehydrating the laundry to be dried, including:

acquiring input current of the clothes dryer in a dehydration stage of clothes to be dried;

and judging whether the clothes in the inner drum are heated in the dehydration stage or not according to the input current.

Optionally, the dewatering stage includes a pre-dewatering sub-stage and a high-speed dewatering sub-stage, and the rotation speed of the inner drum of the pre-dewatering sub-stage is less than that of the inner drum of the high-speed dewatering sub-stage; the determining whether to heat the fabric items in the drum during a dehydration stage according to the input current includes:

in the high-speed dehydration sub-stage, if the input current is less than or equal to a preset current, heating the clothes in the inner drum;

in the high-speed dehydration sub-stage, if the input current exceeds the preset current, the clothes in the inner drum are not heated.

Optionally, the control method further includes:

in the dehydration stage, detecting the eccentricity value of the clothes in the inner drum in real time;

and when the eccentricity value exceeds an eccentricity threshold value, shaking off the clothes in the inner drum.

Optionally, the eccentricity threshold of the pre-dewatering sub-stage is different from the eccentricity threshold of the high-speed dewatering sub-stage.

Optionally, when the temperature change rate is smaller than a set change rate and the weight of the laundry is greater than a set weight, after the laundry to be dried is dehydrated, the control method further includes:

reheating the clothes in the inner drum, and controlling a system to operate for a first time period;

acquiring the real-time temperature and the highest temperature in the inner barrel;

and judging whether to finish drying the clothes in advance according to the real-time temperature and the highest temperature.

Optionally, the determining whether to finish drying the laundry in advance according to the real-time temperature and the maximum temperature includes:

if the difference value between the maximum temperature and the real-time temperature is greater than or equal to the preset temperature difference, stopping the operation of the control system to finish drying the clothes in advance;

and if the difference value between the maximum temperature and the real-time temperature is smaller than the preset temperature difference, continuing to operate to the end in the first time length.

Optionally, the determining whether to dehydrate the laundry to be dried according to the temperature change rate and the laundry weight further includes:

and when the temperature change rate is smaller than the set change rate and the weight of the clothes is smaller than or equal to the set weight, controlling the inner drum to rotate so as to uniformly dry the clothes.

An embodiment of the present application further provides a clothes dryer, including:

an inner drum for carrying the laundry;

the heating component is used for heating the clothes in the inner drum;

a temperature sensor disposed proximate to the inner barrel to detect a temperature within the inner barrel;

a weight sensor disposed adjacent to the inner tub to detect a weight of the laundry in the inner tub;

a controller electrically connected to the inner cylinder, the heating pipe, the temperature sensor, and the weight sensor, respectively, the controller being configured to perform the control method of the dryer according to any one of the above aspects.

According to the control method of the clothes dryer and the clothes dryer, in the drying stage, the temperature change rate in the inner barrel can be obtained according to the temperature in the inner barrel and the heating time, the moisture content of clothes is determined, and whether the moisture content is accurate or not is determined according to the weight of the clothes, so that the accuracy of judging the moisture content of the clothes is improved, the accuracy of judging the drying of the clothes is further improved, and the drying efficiency of the clothes is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.

For a more complete understanding of the present application and its advantages, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts in the following description.

Fig. 1 is a first flowchart of a control method of a clothes dryer according to an embodiment of the present disclosure.

Fig. 2 is a second flow chart of the control method of the clothes dryer provided in the embodiment of the present application.

Fig. 3 is a schematic structural diagram of a clothes dryer provided in an embodiment of the present application.

Fig. 4 is a block diagram of a dryer provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a first flow chart illustrating a control method of a clothes dryer according to an embodiment of the present disclosure. The embodiment of the application provides a control method of a clothes dryer, wherein the clothes dryer can be an independent drying device only having a clothes drying function, and the clothes dryer can also be a washing and drying all-in-one machine, a washing and drying all-in-one machine or a clothes processing device which has a washing function and a drying function at the same time. For example, the clothes dryer may include a cabinet having an accommodating space and an opening, a door rotatably coupled to the cabinet to close the opening or expose the opening, an inner tub, and a heating assembly. The inner tube sets up in accommodation space, and heating element sets up in accommodation space. Of course, the dryer may also include other components, and the above-mentioned components should not be construed as limiting the structure of the dryer. The control method of the dryer includes:

101. in the drying stage of the clothes dryer, clothes to be dried in an inner drum of the clothes dryer are heated.

The clothes dryer can dry clothes, the clothes dryer dries the finished clothes, and a user can directly wear the clothes or directly pack the clothes, so that the clothes drying process is reduced, and the life of the user is facilitated.

The drying process for the laundry is generally: the hot air is conveyed into the inner drum to exchange heat with low-temperature moisture in the clothes to be dried so as to gradually discharge the moisture in the clothes to be dried, and the clothes are continuously turned over in combination with the rotation of the inner drum, so that a heating cycle is formed to dry the clothes.

If the drying program is an automatic judgment program, the drying process can be divided into a heating stage, a constant temperature keeping stage, a low temperature stage and a cooling stage according to different temperatures in the inner cylinder.

The heating-up phase is a phase of heating the clothes in the drum to the working temperature, and the heating-up phase is realized through the heating assembly. The heating components adopted by different clothes dryers are different. In the first case, the heating assembly may include a compressor, an evaporator, a condenser, and an air duct in communication with the inner barrel for providing heated air to the inner barrel. For example, in the case of a heat pump dryer, air of the heat pump dryer is heated into dry hot air by heat energy generated by compression and decompression of a heat pump. The hot and dry air passes through the wet clothes, and the moisture remaining on the clothes absorbs heat and becomes hot and humid air. The damp and hot air is converted into dry cold air after passing through the condenser, and water vapor in the air is condensed into water drops to be discharged. At this time, the dry cool air continues to be heated by the heat energy generated by the compression and decompression of the heat pump, and participates in the whole drying process again and again, and the cycle is repeated until the wet clothes are dried. Under the second condition, heating element can include fan and heating pipe, and fan and heating pipe all set up in stoving wind channel pipe, and wind channel pipe and inner tube intercommunication, the hot air of heating pipe heating is carried to the inner tube in by the fan, and the damp and hot air in the inner tube is cooled into the comdenstion water through the condenser and is discharged, and the continuous participation circulation of heating element and condenser from this is until wet clothes is dried. In the third case, it is also possible to combine the two heating assemblies, and to use different heating and drying processes in different cases, or to add the heating pipe heating and/or the condensing process of the condenser in the second case to the heat pump clothes dryer cycle in the first case. Of course, other heating means are possible, and such are not illustrated.

The constant temperature keeping stage is a stage for keeping the working temperature to operate, and the inner drum can be controlled to rotate at the moment so as to uniformly dry the clothes. The clothes dryer can also comprise a humidity sensor, the humidity value of the clothes in the inner drum is detected through the humidity sensor, and compared with a humidity threshold value, when the humidity value is within the humidity threshold value, the next stage can be entered. The humidity sensor can detect the humidity value of the clothes in the inner drum in real time so as to determine the operation state of the clothes dryer according to the humidity value.

The low temperature stage is a process of drying the clothes at a low temperature when the humidity of the clothes is low, at the moment, the moisture content of the clothes is low, the working temperature of the constant temperature keeping stage is not required to be 60 ℃, another working temperature such as 40 ℃ can be adopted for drying, the clothes are not burnt while the clothes are dried, and the power consumption is reduced.

And a cooling stage, namely a stage for finishing the drying process, wherein at the moment, the compressor can be closed or the heating pipe is closed, namely the hot air circulation is stopped, and the inner cylinder of the clothes dryer is naturally cooled and cooled. The cooling phase may have a preset duration, and after the cooling phase is finished, a user may open a door of the dryer to take the laundry out of the drum. In the middle or later stage of the cooling stage, a program can be set, at the moment, the door of the clothes dryer can be set to be unlocked or unlocked, and a user can open the door to take out the clothes, so that the temperature of the clothes in the inner drum is not too high, and the user can be prevented from being burnt.

Therefore, in the drying stage, the clothes to be dried in the inner drum can be heated firstly, and when the inner drum is heated to the working temperature such as 60 ℃, the drying cycle process of the clothes can be started.

102. The temperature change rate in the inner cylinder and the weight of the clothes in the inner cylinder are obtained.

In the heating process, the heating time length can be obtained, initial temperature in the inner barrel is used, the temperature change rate can be obtained during the working temperature and the heating time length, the water content of clothes can be known according to the temperature change rate curve, if the water content of clothes is high, then the clothes can be dehydrated and then dried, if the water content of clothes is low, the clothes directly enter the drying process, different processing modes can be selected according to different conditions, the drying time of the clothes dryer is shortened, the power consumption is reduced, the drying judgment accuracy rate is increased, the drying efficiency of the clothes dryer is improved, and the purposes of energy conservation and emission reduction are achieved.

For example, after the drying program is started, the fan and the air heating pipe are firstly started, the temperature sensor is used for detecting the temperature in the inner barrel in real time, the initial temperature T0 in the inner barrel is recorded, and when the temperature in the inner barrel reaches the working temperature T1, the heating time of the drying program from the beginning to the heating to the working temperature T1 is recorded, so that the temperature change rate in the inner barrel can be calculated. The standard starting temperature of the program may be set to be 20 ℃, for example, the standard initial starting temperature of 20 ℃ is converted with the initial temperature T0, the corresponding compensation time may be calculated, and the time length used for calculating the temperature change rate may be the sum of the heating time length and the compensation time.

It should be noted that the temperature change rate may be calculated according to the temperature in the inner cylinder detected in real time and the heating time corresponding to the real-time temperature in the inner cylinder, or the temperature value in the inner cylinder at each time point is recorded, and a temperature change rate curve is obtained through curve fitting, so as to obtain the temperature change rate.

The temperature change rate in the inner drum can represent the heating speed of the clothes, and further can reflect the moisture content of the clothes. Note that the temperature change rate and the moisture content of the laundry have an inverse correlation. Specifically, the greater the rate of change of temperature in the inner drum, i.e., the faster the heating, the lower the moisture content in the laundry can be reflected. Correspondingly, the smaller the temperature change rate in the inner barrel is, the slower the heating is, and the higher the moisture content in the clothes can be reflected.

It can be understood that the temperature change rate in the inner drum can reflect the moisture content of the clothes, but under the same heating condition, different weights of the clothes also have influence on the temperature change rate in the inner drum. For example, the larger the weight of the laundry, the smaller the temperature change rate in the inner tub, which means the larger the moisture content of the laundry. Therefore, the moisture content of the clothes is judged only by the temperature change rate in the inner barrel, so that the problem of inaccurate judgment exists, and the drying efficiency of the clothes is reduced.

Therefore, in the process of drying the clothes, the temperature change rate in the inner drum and the weight of the clothes in the inner drum are obtained, the water content of the clothes is comprehensively determined according to the temperature change rate and the weight of the clothes, or the water content of the clothes is determined according to the temperature change rate, and then whether the judgment of the water content of the clothes is accurate or not is determined according to the weight of the clothes, so that the accuracy of judging the water content of the clothes can be improved, and the drying judgment accuracy and the drying efficiency are improved.

The weight sensor can be arranged at the bottom of the inner drum, and the weight of the inner drum when the clothes are not placed and the total weight of the clothes and the inner drum after the clothes are placed are detected to obtain the weight of the clothes.

103. And judging whether to dehydrate the clothes to be dried according to the temperature change rate and the weight of the clothes.

The temperature change rate and the weight of the clothes can comprehensively reflect the moisture content of the clothes. When judging that clothing moisture content is more, can increase the dehydration process in the stoving stage, also make the inner tube rotational speed increase to dewater to moisture content in the clothing when can reducing the stoving stage, and then reduce the stoving time and promote drying efficiency. Correspondingly, when the moisture content of the clothes is judged to be lower, the clothes can be directly dried. Different control schemes are adopted under different clothes moisture content conditions, but not the same control scheme is adopted under all clothes moisture content conditions, so that the power consumption can be reduced, and the overall drying efficiency of the clothes dryer is improved.

According to the control method of the clothes dryer, in the drying stage, the temperature change rate in the inner barrel can be obtained according to the temperature in the inner barrel and the heating time, so that the moisture content of clothes is determined, and whether the moisture content is accurate or not is determined according to the weight of the clothes, so that the accuracy of judging the moisture content of the clothes is improved, the accuracy of judging the drying of the clothes is further improved, and the drying efficiency of the clothes is further improved.

Referring to fig. 2 in conjunction with fig. 1, fig. 2 is a second flow chart of a control method of a clothes dryer according to an embodiment of the present application. The control method of the dryer further includes:

201. in the drying stage of the clothes dryer, clothes to be dried in an inner drum of the clothes dryer are heated.

The clothes dryer can dry clothes, the clothes dried by the clothes dryer can be directly worn or directly put away by a user, the clothes drying process is reduced, and the life of the user is facilitated.

The heating-up stage is a stage for heating the clothes in the drum to the working temperature, and the process is realized by the heating assembly. The heating components adopted by different clothes dryers are different. In the first case, the heating assembly may include a compressor, an evaporator, a condenser, and an air duct in communication with the inner barrel for providing heated air to the inner barrel. For example, in the case of a heat pump dryer, air of the heat pump dryer is heated into dry hot air by heat energy generated by compression and decompression of a heat pump. The hot and dry air passes through the wet clothes, and the moisture remaining on the clothes absorbs heat and becomes hot and humid air. The damp and hot air is converted into dry cold air after passing through the condenser, and water vapor in the air is condensed into water drops to be discharged. At this time, the dry cool air continues to be heated by the heat energy generated by the compression and decompression of the heat pump, and participates in the whole drying process again and again, and the cycle is repeated until the wet clothes are dried. Under the second condition, heating element can include fan and heating pipe, and fan and heating pipe all set up in stoving wind channel pipe, and wind channel pipe and inner tube intercommunication, the hot air of heating pipe heating is carried to the inner tube in by the fan, and the damp and hot air in the inner tube is cooled into the comdenstion water through the condenser and is discharged, and the continuous participation circulation of heating element and condenser from this is until wet clothes is dried. In the third case, it is also possible to combine the two heating assemblies, and to use different heating and drying processes in different cases, or to add the heating pipe heating and/or the condensing process of the condenser in the second case to the heat pump clothes dryer cycle in the first case. Of course, other heating means are possible, and such are not illustrated.

202. The temperature change rate in the inner cylinder and the weight of the clothes in the inner cylinder are obtained.

The temperature change rate in the inner drum can represent the heating speed of the clothes, and further can reflect the moisture content of the clothes. Note that the temperature change rate and the moisture content of the laundry have an inverse correlation. Specifically, the greater the rate of change of temperature in the inner drum, i.e., the faster the heating, the lower the moisture content in the laundry can be reflected. Correspondingly, the smaller the temperature change rate in the inner drum is, the slower the heating is, which can reflect the higher moisture content in the clothes.

It can be understood that the temperature change rate in the inner cylinder can reflect the moisture content of the clothes, but under the same heating condition, different clothes weights also have influence on the temperature change rate in the inner cylinder. For example, the larger the weight of the laundry, the smaller the temperature change rate in the inner tub, which means the larger the moisture content of the laundry. Therefore, the moisture content of the clothes is judged only by the temperature change rate in the inner barrel, so that the problem of inaccurate judgment exists, and the drying efficiency of the clothes is reduced.

203. And when the temperature change rate is smaller than the set change rate and the weight of the clothes is larger than the set weight, dehydrating the clothes to be dried.

If the temperature change rate is smaller than the set change rate, the temperature change in the inner drum is slow, and the moisture content in the clothes can be represented to be high. To further determine whether the judgment of the moisture content of the laundry is accurate, the weight of the laundry may be compared with a set weight. When the weight of the clothes is larger than the set weight, the moisture content of the clothes is really high, and the clothes to be dried can be dehydrated at the moment.

In other words, when the weight of the laundry is within the set weight, it is determined that the moisture content of the laundry is not high, and the dewatering is not required. The set weight may be obtained through a plurality of calibration experiments, for example, calibrating different weights of the same kind and number of pieces of laundry, detecting a plurality of drying times, and obtaining an average value of the weights of the laundry not requiring dehydration as the set weight.

It should be noted that the set weight is also related to the drying program selected by the user, for example, the drying program selected by the user is wool drying, and corresponds to the first set weight. For another example, the drying program selected by the user is down drying, and the second set weight is correspondingly set. For example, the drying program selected by the user is mix drying, and the third set weight is correspondingly provided. Of course, the drying process may also include other types, which are not described in detail herein. It is understood that the set weight corresponding to the set weight is different for clothes of different materials because the water absorption rate is different.

According to the relation between the weight of the clothes and the set weight and the drying program selected by the user, whether the moisture content of the clothes is accurate or not can be judged according to the temperature change rate, and the accuracy of judging the moisture content of the clothes is improved, so that the power consumption of the clothes dryer is reduced, and the drying efficiency of the clothes dryer is improved.

Correspondingly, when the temperature change rate is smaller than the set change rate and the weight of the clothes is smaller than or equal to the set weight, the inner drum is controlled to rotate so as to uniformly dry the clothes. It can be understood that when the temperature change rate is less than the set change rate, it indicates that the temperature rise is slow, that is, the moisture content of the laundry is high. When the determination is further made through the weight of the laundry, if the weight of the laundry is less than or equal to the set weight, it indicates that the determination of the moisture content of the laundry is not accurate, that is, the moisture content of the laundry is low at this time, and the laundry can be directly dried. The drying process can also enter a constant temperature keeping stage, and the inner drum is controlled to rotate so as to drive the clothes to turn over, thereby uniformly drying the clothes.

When the temperature change rate is larger than or equal to the set change rate, the temperature rise is indicated to be fast, so that the moisture content of the clothes can be indicated to be low, and the clothes can be directly dried without the weight of the clothes for auxiliary detection.

204. In the dehydration stage of the clothes to be dried, the input current of the clothes dryer is obtained.

205. And judging whether the clothes in the inner drum are heated in the dehydration stage according to the input current.

With respect to steps 205 and 206:

when the moisture content of the clothes is determined to be higher, the clothes to be dried are dehydrated to reduce the moisture content of the clothes, so that the drying time is reduced, and the drying efficiency is improved.

In the dehydration process, if the drying machine can heat and dehydrate at the same time, the dehydration efficiency can be improved, so that the time of the drying process of the clothes dryer is saved, and the drying efficiency is improved. In the dehydration process, the motor drives the inner cylinder to rotate, and whether the clothes dryer consumes larger power or not can be judged according to the input current of the clothes dryer. If the dryer consumes a large amount of power during the dewatering process due to an excessively high rotation speed of the motor, for example, if the clothes in the inner drum are heated at this time, the clothes are easily overloaded and the operation of the dryer is affected. Therefore, in the dehydration stage, whether the clothes in the inner drum are heated or not is judged according to the input current of the clothes dryer, whether the clothes are heated or not is judged according to the load state of the clothes dryer, the energy consumption can be saved, and the problem of overload of the clothes dryer is not easy to cause.

206. In the high-speed dehydration sub-stage, if the input current is less than or equal to the preset current, the clothes in the inner drum are heated.

207. In the high-speed dehydration sub-stage, if the input current exceeds the preset current, the clothes in the inner drum are not heated.

With respect to steps 206 and 207:

the dehydration stage comprises a pre-dehydration sub-stage and a high-speed dehydration sub-stage, and the rotating speed of the inner cylinder of the pre-dehydration sub-stage is less than that of the inner cylinder of the high-speed dehydration sub-stage. It can be understood that, when the laundry is dehydrated, there is a process from low-speed dehydration to high-speed dehydration so that the dryer operates smoothly, rather than directly at high speed, preventing the problems of drum collision and reduced dehydration efficiency.

In the dehydration stage, detecting the eccentricity value of the clothes in the inner drum in real time, and shaking up the clothes in the inner drum when the eccentricity value exceeds an eccentricity threshold value. When shaking and dispersing the clothes, the rotating speed of the inner barrel is different from the rotating speed of the inner barrel in the dehydration stage, for example, the rotating speed of the inner barrel can be shaken and dispersed by setting the rotating speed lower than that of the pre-dehydration sub-stage, and the inner barrel is controlled to rotate forward and backward alternately according to the preset times so as to shake and disperse the clothes, so that the clothes are prevented from being gathered in a certain area of the inner barrel and the phenomenon of hitting the inner barrel during the dehydration rotation is caused.

It will be understood that, since the dehydration phase comprises a pre-dehydration sub-phase and a high-speed dehydration sub-phase, the high-speed dehydration sub-phase is generally carried out after the pre-dehydration sub-phase, and the laundry weight varies in different sub-phases of the dehydration phase, the corresponding eccentricity thresholds are different.

For example, when the spin-drying stage is started, the eccentricity value of the laundry in the drum is detected, and if the eccentricity value is greater than the first eccentricity threshold value, the laundry in the drum is shaken up until the eccentricity value is within the first eccentricity threshold value or equal to the first eccentricity threshold value. For the first time of pre-dewatering, for example, the inner drum can be controlled to pre-dewater the clothes in the inner drum at the rotating speed of 400rpm. And after the preset time of the first pre-threshing operation, detecting the eccentricity value of the clothes in the inner drum again, if the eccentricity value is greater than a second eccentricity threshold value, shaking up the clothes in the inner drum until the eccentricity value is within the second eccentricity threshold value or equal to the second eccentricity threshold value. The second pre-dewatering can be performed, for example, the inner drum can be controlled to perform pre-dewatering on the clothes in the inner drum at a rotating speed of 600 rpm. Since the weight of the clothes in the inner drum is changed after the first pre-doffing, the second eccentricity threshold value is smaller than the first eccentricity threshold value. And detecting the eccentricity value of the clothes in the inner drum again, and if the eccentricity value is greater than the third eccentricity threshold value, shaking up the clothes in the inner drum until the eccentricity value is within the third eccentricity threshold value or equal to the third eccentricity threshold value. The third eccentricity threshold is less than the second eccentricity threshold. At this point, the operation of the two pre-dewatering sub-stages is finished, and the high-speed dewatering sub-stage can be entered.

At the high-speed dehydration sub-stage, whether to open the heating pipe to dehydrate the inner side of the inner cylinder at the same time needs to be determined according to the input current of the clothes dryer so as to improve the dehydration efficiency, and further shorten the drying time of the clothes, thereby improving the drying efficiency of the clothes. If the input current is less than or equal to the preset current, the power of the whole machine is low, and the clothes dryer cannot be overloaded even if the heating pipe is started and the motor is controlled to run at high speed at the same time, so that the clothes in the inner drum can be heated. Correspondingly, if the input current is greater than the preset current, the power of the whole machine is higher, and if the heating pipe is started and the motor is controlled to run at high speed at the same time, the overload phenomenon of the clothes dryer is easily caused; therefore, in this case, only the laundry is dehydrated at a high speed without heating.

The high-speed dehydration sub-stage is also a main dehydration sub-stage, the high-speed dehydration sub-stage comprises secondary high-speed dehydration and highest-speed dehydration, and the rotating speeds of the inner cylinders corresponding to the secondary high-speed dehydration and the highest-speed dehydration are different, for example, the rotating speed of the inner cylinder during the secondary high-speed dehydration can be 1200rpm, and the rotating speed of the inner cylinder during the highest-speed dehydration can be 1400rpm.

For example, after the clothes are pre-dewatered for the second time and are subjected to shaking adjustment, whether the input current of the clothes dryer is less than or equal to I1 ampere is judged, if yes, the heating pipe is started to heat the inner cylinder, and meanwhile, the next high-speed dewatering is performed, that is, the inner cylinder is controlled to dewater the clothes in the inner cylinder at the rotating speed of 1200 rpm. If not, the heating pipe is closed, and the inner drum is controlled to feed water into the clothes in the inner drum at the rotating speed of 1200rpm for dehydration. And detecting the relation between the eccentricity value of the clothes in the inner drum and a fourth eccentricity threshold, and if the eccentricity value is greater than the fourth eccentricity threshold, performing dispersion adjustment on the clothes in the inner drum until the eccentricity value is within the fourth eccentricity threshold or equal to the fourth eccentricity threshold. And then, judging whether the input current of the whole machine is less than or equal to I2 ampere, if so, starting a heating pipe to heat the inner cylinder, and simultaneously operating the highest-speed dehydration, namely controlling the inner cylinder to dehydrate the clothes in the inner cylinder at the rotating speed of 1400rpm. If not, the heating pipe is closed, and the inner drum is controlled to feed water into the clothes in the inner drum at the rotating speed of 1400rpm for dehydration. Wherein, I1 ampere is less than I2 ampere, and the selection of I1 ampere and I2 ampere can be set according to the requirement, which is not limited here.

208. And reheating the clothes in the inner drum, and controlling the system to operate for a first time.

And after the dehydration is finished, continuously drying the clothes. Because the dehydration takes a certain time, after the dehydration is finished, the temperature in the inner barrel is reduced, therefore, after the dehydration is finished, the clothes in the inner barrel are reheated, namely, the condenser, the drainage pump and the heating pipe are started, the heating pipe heats the air, the hot air is blown into the inner barrel through the fan, the hot humid air in the inner barrel is cooled and condensed by the inlet water, the drainage pump discharges the condensed water, and therefore the clothes in the inner barrel are dried and circulated. After the clothes in the inner drum are heated again to the working temperature, drying circulation in the inner drum is started, and the control system operates for a first time length, wherein the first time length tx = a × t ³ +b*t ² + ct + d, where a, b, c and d are all constants and t is the heating duration. The first time period represents a remaining time period for drying the laundry to be dried.

209. And acquiring the real-time temperature and the highest temperature in the inner barrel.

210. And determining whether to finish the drying of the clothes in advance according to the real-time temperature and the highest temperature.

With respect to steps 209 and 210:

in the process of drying the clothes, the real-time temperature in the inner cylinder is obtained, and the highest temperature in the drying process is recorded. And judging whether to finish drying the clothes in advance according to the real-time temperature and the highest temperature. For example, if the difference between the maximum temperature and the real-time temperature is greater than or equal to the preset difference, it indicates that the real-time temperature is lower, which may indicate that the drying process is substantially completed at this time, and therefore, the system may be controlled to stop operating, so as to finish drying the laundry in advance. Correspondingly, if the difference value between the maximum temperature and the real-time temperature is smaller than the preset temperature difference, the drying process is continued to be finished for the first time. According to the embodiment of the application, the clothes are judged to be dry according to the real-time temperature of the clothes, the accuracy of judging the clothes to be dry can be improved, and the drying efficiency of the clothes is further improved.

When entering the cooling stage, the program is ended, and the motor, the fan, the drainage pump and the condensation water inlet valve are closed. Thereby, the whole drying process of the laundry is completed.

According to the control method of the clothes dryer provided by the embodiment of the application, in the drying stage, the temperature change rate in the inner drum can be obtained according to the temperature in the inner drum and the heating time length, so that the moisture content of clothes is determined, and whether the moisture content is accurate or not is determined according to the weight of the clothes, so that the accuracy of judging the moisture content of the clothes is improved; and, whether heating is carried out while dehydrating is judged according to the input current of the clothes dryer in the dehydration stage, so that the dehydration efficiency can be improved, the drying time of clothes is shortened, and the drying efficiency of the clothes is improved.

Referring to fig. 3 and 4 in combination with fig. 1 and 2, fig. 3 is a schematic structural diagram of a clothes dryer provided in an embodiment of the present application, and fig. 4 is a block structural diagram of the clothes dryer provided in the embodiment of the present application. The embodiment of the application further provides a clothes dryer 1, the clothes dryer 1 may be an independent drying device with a drying function, the clothes dryer 1 may also be a washing and drying all-in-one machine or a washing and drying all-in-one machine with a washing function and a drying function, and the clothes dryer 1 may also be an exhaust type clothes dryer, a heat pump type clothes dryer or a condensation type clothes dryer. The dryer 1 includes an inner drum 10, a heating assembly 20, a temperature sensor 30, a weight sensor 40, and a controller 50. The dryer 1 may further include a door and a cabinet having an accommodating space and an opening, the door being rotatably coupled to the cabinet to close the opening or expose the opening. The inner cylinder 10 is disposed in the accommodating space, and the heating assembly 20 is disposed in the accommodating space. The heating assembly 20 can be a combination of a heater tube and a fan, i.e., the heater tube delivers hot air into the inner barrel by heating the air and passing the hot air through the fan. The heating unit 20 may also be a hot air circulation consisting of a compressor, an evaporator and a condenser. The heating assembly 20 may also be a combination of a heating assembly and a fan plus a compressor, evaporator and condenser. The temperature sensor 30 and the weight sensor 40 are used to detect the temperature inside the drum 10 and the weight of the laundry inside the drum 10, respectively. The controller 50 is electrically connected to the inner drum 10, the heating assembly 20, the temperature sensor 30 and the weight sensor 40, respectively, and the controller 50 is configured to perform the above-mentioned control method of the clothes dryer, which can be referred to fig. 1 and 2 and the above description, and will not be described again.

In the control method of the clothes dryer and the clothes dryer provided by the embodiment of the application, in the drying stage, the temperature change rate in the inner drum can be obtained according to the temperature in the inner drum and the heating time length, so that the moisture content of the clothes is determined, and whether the moisture content is accurate or not is determined according to the weight of the clothes, so that the accuracy of judging the moisture content of the clothes is improved; and, whether heating is carried out while dehydrating is judged according to the input current of the clothes dryer in the dehydration stage, so that the dehydration efficiency can be improved, the drying time of clothes is shortened, and the drying efficiency of the clothes is improved.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.

The above detailed description is provided for the control method of the clothes dryer and the clothes dryer provided in the embodiments of the present application, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A control method of a clothes dryer, characterized by comprising:

2. The control method according to claim 1, wherein the determining whether to dehydrate the laundry to be dried according to the temperature change rate and the laundry weight comprises:

3. The control method according to claim 2, wherein when the temperature change rate is less than a set change rate and the laundry weight is greater than a set weight, dehydrating the laundry to be dried, comprises:

in the dehydration stage of clothes to be dried, acquiring input current of the clothes dryer;

4. The control method of claim 3, wherein the dewatering stage includes a pre-dewatering sub-stage and a high-speed dewatering sub-stage, the rotational speed of the drum of the pre-dewatering sub-stage being less than the rotational speed of the drum of the high-speed dewatering sub-stage; the determining whether to heat the fabric items in the drum during a dehydration stage according to the input current includes:

5. The control method according to claim 4, characterized by further comprising:

6. Control method according to claim 5, characterized in that the eccentricity threshold of the pre-dewatering sub-stage is different from the eccentricity threshold of the high-speed dewatering sub-stage.

7. The control method according to claim 2, wherein after dehydrating the laundry to be dried when the temperature change rate is less than a set change rate and the laundry weight is greater than a set weight, the control method further comprises:

8. The control method according to claim 7, wherein the judging whether to finish the drying of the laundry in advance according to the real-time temperature and the maximum temperature comprises:

if the difference value between the maximum temperature and the real-time temperature is greater than or equal to the preset temperature difference, the control system stops running to finish drying the clothes in advance;

9. The control method according to claim 2, wherein the determining whether to dehydrate the laundry to be dried according to the temperature change rate and the laundry weight further comprises:

10. A clothes dryer, characterized by comprising:

an inner drum for carrying the laundry;

the heating component is used for heating the clothes in the inner drum;

a controller electrically connected to the inner tub, the heating duct, the temperature sensor, and the weight sensor, respectively, the controller for performing the control method of the dryer according to any one of claims 1 to 9.