WO2018040931A1 - Procédé de détermination de siccité pour sèche-linge - Google Patents

Procédé de détermination de siccité pour sèche-linge Download PDF

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Publication number
WO2018040931A1
WO2018040931A1 PCT/CN2017/097874 CN2017097874W WO2018040931A1 WO 2018040931 A1 WO2018040931 A1 WO 2018040931A1 CN 2017097874 W CN2017097874 W CN 2017097874W WO 2018040931 A1 WO2018040931 A1 WO 2018040931A1
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WIPO (PCT)
Prior art keywords
temperature
drying
detected
laundry
clothes
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PCT/CN2017/097874
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English (en)
Chinese (zh)
Inventor
宋华诚
许升
田书君
赵志强
Original Assignee
青岛海尔滚筒洗衣机有限公司
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Publication of WO2018040931A1 publication Critical patent/WO2018040931A1/fr

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/12—Temperature

Definitions

  • the invention relates to a drying device, in particular to a dryer, in particular to a drying machine.
  • Dryer as its name implies, is a device for drying clothes.
  • the advent of dryers has brought great convenience to people's lives, enabling people to get dry clothes on rainy days.
  • a device for generating heated air mostly adopts a heating method of heating air by a heater.
  • the existing electric dryers generally use a heating wire or a heating tube as a heat source, and such products have high energy consumption, long drying time and poor safety.
  • a heat pump dryer In order to reduce energy consumption, a heat pump dryer has been developed, which uses a heat pump system to enhance the recycling of heat, improve heat utilization efficiency, and reduce power consumption.
  • the humidity sensor of the clothes is divided into a resistive type and a capacitive type, and different humiditys correspond to different resistance values or
  • the value of the control method requires a large number of tests to verify and match, but the clothing humidity sensor has a characteristic that the resistance value or the capacitance value will drift as the usage time increases, thus causing the test value and the actual value. There are deviations.
  • the judgment is not accurate. For example, if the load is wrapped by a large object, the large object is already dry, but the wrapped load is still wet, so the failure will cause the load to dry insufficiently.
  • the method of using the temperature sensor to determine the degree of dryness of the load is relatively simple, and is to run a set drying time or a set temperature under a standard environmental standard capacity load.
  • a drum dryer with a rated power of 1600W and a rated capacity of 6kg uses a standard energy consumption program to dry a standard 6kg cotton load to a final moisture content of 4%.
  • the program is set to run for 180 minutes or the outlet temperature.
  • Set 50 °C when the running time or the outlet temperature reaches any of the set values, the dryer stops heating.
  • This method requires strict implementation of the type and quality of the clothes.
  • the type, quality, and initial moisture content of the clothes placed in the drum are uncertain, so the judgment accuracy of the dryer is required. Very high, Failure to do so may result in the drying of the clothes, or the drying time may be too long, which may cause the user to use the expected deviation.
  • the Chinese patent application No. CN201020104047.X discloses an intelligent fuzzy control device for the drying process based on the weighing method.
  • the intelligent fuzzy control device continuously determines the load weight and determines the dryness of the load through a fuzzy algorithm.
  • the intelligent fuzzy control device has a narrow use range. When the drying cylinder is in operation, the drying cylinder is in a continuous rotation state or the stopping time is very short, which adds great difficulty to the measurement weight, and the measurement result also has a certain error.
  • the Chinese patent application No. CN200910210029.1 discloses a control method of a heat pump dryer and a heat pump dryer.
  • the control method comprises the following steps: providing a drying chamber for controlling the gas discharged from the drying chamber to discharge the heat pump.
  • the control method is to measure the humidity of the clothes and the absolute moisture content of the intake air, the absolute moisture content of the air, the inlet air temperature, the return air temperature, the inlet air and the return air temperature, etc., and the control method also exists due to use. The measurement deviation caused by long time, which in turn affects the working performance of the dryer.
  • the present invention has been made in view of the above.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a drying machine having a high judgment precision, protecting clothes from scalding, uniform drying, and good effect.
  • the basic idea of adopting the technical solution of the present invention is: a method for dry-drying the machine, comprising: starting the dry clothes, detecting the temperature at different positions in the dry clothes, and determining whether the clothes are different according to the detected temperature difference. Drying is complete.
  • detecting the temperature at different positions in the drying cylinder comprises: detecting the temperature of the M*N positions in the drying cylinder in a matrix by an infrared temperature sensor.
  • the infrared temperature sensor has a plurality of infrared measuring points, and the temperature of each point is detected in a matrix manner.
  • the selection of M and N is related to the model of the infrared temperature sensor, preferably 8*8-32*32.
  • the invention measures the drying of the laundry by using a non-contact infrared sensor to measure a plurality of temperature points in the cylinder, and the measurement is more accurate.
  • determining whether the laundry is dry according to the detected temperature difference comprises: obtaining the detected minimum value of the temperature and comparing with the outlet temperature, when the detected minimum value is greater than or equal to the outlet temperature or the comparison difference Within the preset range, the laundry is dried;
  • the outlet temperature is the temperature value within the detected dry cylinder that is closest to the outlet position.
  • determining whether the laundry is dry according to the detected temperature difference comprises: comparing a temperature minimum value in at least one column of the selection matrix with a discharge cylinder temperature, and when the detected temperature minimum value is greater than or equal to a discharge cylinder temperature or a comparison difference Value When it falls within the preset range, the laundry is dried;
  • the temperature minimum in either column is selected to be compared with the outlet temperature; more preferably, the temperature minimum in either column is selected to be compared to the outlet temperature.
  • determining whether the laundry is dried according to the detected temperature difference comprises: obtaining a maximum value and a minimum value of the detected temperature and obtaining a difference, and when the difference falls within a preset range, the laundry drying is completed.
  • determining whether the laundry is dried according to the detected temperature difference comprises: obtaining a maximum value and a minimum value of the temperature in at least one row in the matrix and obtaining a difference, and when the difference falls within a preset range, the laundry drying is completed.
  • determining whether the laundry is dried according to the detected temperature difference comprises: performing multiple measurements during the drying process, and detecting that the temperature difference of the temperature measurement point changes from large to small or the temperature decrease rate of the measurement point changes from large to large Small, it is judged that the clothes are dry.
  • drying clothes start, first determine the amount of clothing, specifically:
  • the temperature at different positions in the drying cylinder is detected, and when the detected low temperature number is less than the set value, the amount of the laundry is judged to be small, otherwise, the amount of the laundry is judged to be large.
  • the low temperature point is a point at which the temperature measurement point is lower than the temperature of the surrounding measurement point, or the average value of the maximum value and the minimum value detected by each measurement point in the dry cylinder is first calculated, and the detection temperature value is defined as lower than the average value.
  • the measurement point is the low temperature point.
  • the heating is stopped first, the laundry is naturally cooled or the cold air is cooled to cool the laundry for a set time, and then the temperature is detected;
  • the manner of providing cold air to cool the temperature inside the drying cylinder comprises: indirectly cooling the drying air by means of a condenser, or directly supplying cold air into the drying cylinder.
  • the detection process if the temperature difference of the measurement point is not found in the temperature detection multiple times, it is determined according to the speed of the temperature drop after the cold air is blown, and the change value of the detected temperature drop in the set time period is compared with the set threshold value. If it is greater than the set threshold, it is judged that the humidity is large, the drying is not completed, otherwise the drying is completed, and the threshold value is related to the amount of the laundry and the temperature difference between the inside and the outside of the drying cylinder.
  • the method further comprises: monitoring the humidity of the laundry, and when the humidity reaches the preset value of the humidity, detecting the temperature of the different positions in the drying cylinder, and according to the detected The difference in temperature determines whether the laundry is dry or not.
  • the clothing is started when the temperature near the outlet of the drying cylinder reaches the preset temperature value. Dry judgment.
  • the present invention has the following advantageous effects compared with the prior art.
  • the invention detects the temperature of different positions in the dry clothes cylinder, that is, can detect the temperature of different parts of the clothes, obtains the uniformity of drying of the clothes according to the detected temperature difference, and further determines whether the clothes are dried or not, especially for drying some thicknesses. Uneven clothes such as jeans have a very good drying effect, which can avoid the situation where the clothes are not dried and complete the drying, and also avoid the damage caused by the clothes drying time.
  • the invention also stops the heating of the clothes in the drying cylinder first, and then detects the temperature of each point after the temperature is lowered in the cylinder, and judges whether the laundry is dried according to the detected temperature difference, and the temperature difference includes the temperature of the detecting point itself.
  • the change in the speed of the drop, the change in the temperature difference between the points, the change in the temperature at the detection point, and the difference in the set parameter or the outlet temperature can all determine whether the laundry is dry.
  • Figure 1 is a schematic view of a clothes dryer of the present invention
  • the temperature at different positions in the drying cylinder is detected, and whether the laundry is dried or not is determined according to the detected temperature difference.
  • the infrared temperature sensor 2 detects the M*N positions in the dry cylinder in a matrix manner by infrared detection. The temperature is measured to detect the difference in temperature between different parts of the clothes in the dry clothes cylinder, and it is judged whether all parts of the clothes have been dried, that is, whether the clothes are uniformly dried, thereby judging whether the clothes in the drum are dry or not.
  • the infrared temperature sensor 2 is installed on the front upper side of the drying cylinder 1, that is, above the laundry injection port 3, and has a plurality of infrared measuring points, which can detect the temperature values of the M*N positions in the opposite cylinder.
  • the selection of M and N is related to the model of the infrared temperature sensor and also to the capacity of the dryer cylinder 1.
  • the invention adopts the non-contact infrared sensing to measure the temperature of the 8*8 or 16*16 in the cylinder to judge the drying of the laundry, and the measurement is more accurate.
  • Tij represents the temperature of the measurement point of the i-th row and the j-th column, 1 ⁇ i, j ⁇ 8.
  • the dryer drying cylinder stops rotating, so that the laundry is in a stable state when the temperature is detected, and the detection accuracy is improved.
  • the detected temperature value is compared with the outlet temperature to determine whether the laundry is dry or not. Specifically:
  • the uniformity of laundry drying is judged.
  • the temperature of the clothes in the cylinder will gradually decrease from the air inlet to the air outlet. Since the water absorbs heat during the evaporation process, the local temperature is lower than the outlet temperature. Therefore, if the local temperature in the detection cylinder is less than The outlet air temperature indicates that the laundry in the local portion contains water that has not been evaporated, and it is judged that the laundry is not dried; if the detected minimum temperature is greater than the outlet temperature, it is determined that the laundry is evenly dried and the drying is completed.
  • the above precise drying method is not required, and a certain amount of deviation is allowed.
  • the difference between the temperature of each measuring point in the cylinder and the temperature of the outlet cylinder ⁇ ⁇ T ⁇ is less than 1 ° C, and the clothing is determined. Dry evenly.
  • This embodiment is a simplified judgment of the first embodiment: the temperature of one column in the matrix is selected, for example, the fourth column is detected.
  • the volume point temperature value Ti4 is compared with the outlet temperature, and if the difference ⁇ T ⁇ is less than 1 ° C, it is judged that the laundry is dry.
  • the temperature minimum value in at least two columns in the matrix may be selected to be compared with the outlet temperature.
  • the detected minimum temperature is greater than or equal to the outlet temperature or the compared difference falls within a preset range, then The clothes are dry and finished.
  • the outlet temperature of the present invention may be the outlet temperature detected by the separately provided temperature sensor, or the infrared temperature sensor may detect the temperature value closest to the outlet position.
  • the difference between the maximum value and the minimum value of the detected temperature is determined, and when the difference falls within the preset range, it is judged that the drying of the laundry is completed.
  • the maximum value and the minimum value of the temperature in at least one row of the matrix are acquired and the difference is obtained.
  • the difference falls within the preset range, the laundry drying is completed.
  • the minimum value Tmin(i) of the measurement point temperature in the i-th row is compared with the maximum value Tmax(i) of the row to calculate a difference. If the difference is less than ⁇ Ti ⁇ , for example, ⁇ Ti ⁇ is set to 1 °C, then Make sure the clothes are dry.
  • the temperature of the intermediate position may be selected for determination. For example, the minimum temperature value Tmin(4) of the fourth line is detected and compared with the maximum value Tmax(4) of the line. If the difference is smaller than ⁇ T4 ⁇ , When ⁇ T4 ⁇ is set to 1 °C, it is judged that the laundry is dry.
  • This embodiment is an improvement of the above embodiment.
  • a plurality of measurements are performed. When it is detected that the temperature difference of the temperature measurement point is changed from large to small, or the temperature decrease rate of the measurement point is changed from large to small, the clothing is judged. dry.
  • the embodiment needs to determine the amount of the laundry, specifically:
  • the drying is not judged first, the amount of the clothes is first determined, and after the set time of the drying clothes is set, the temperature at different positions in the drying cylinder is detected, and when the number of detected low points is less than the set value, the amount of the clothes is judged. Less, otherwise, judge the amount of clothing.
  • the low temperature point is a point at which the temperature measurement point is lower than the temperature of the surrounding measurement point, or the average value of the maximum value and the minimum value detected by each measurement point in the dry cylinder is first calculated, and the detection temperature value is defined as lower than the average value.
  • the measurement point is the low temperature point.
  • the invention stops heating before detecting the temperature in different positions in the drying cylinder, and relies on natural cooling of the clothes or providing cold air.
  • the temperature is detected after cooling the laundry for a set time, because the moist laundry absorbs heat due to evaporation of moisture in the laundry when the heating is stopped, and the temperature is lowered faster than the portion of the drying cylinder that is not covered by the laundry.
  • the manner of providing cold air to cool the temperature inside the drying cylinder comprises: indirectly cooling the drying air by means of a condenser, or directly supplying cold air into the drying cylinder.
  • This embodiment is performed before the above embodiment detects the amount of laundry and each time the laundry is judged to be dried, first stops heating, cools the temperature inside the cylinder, and then detects the laundry or judges whether or not the drying is completed.
  • the determination needs to be based on the speed of the temperature drop after the cold air, and the temperature is detected within the set time period.
  • the change value is compared with the set threshold. If it is greater than the set threshold, the humidity is judged to be large, and the drying is not completed. Otherwise, the drying is completed, and the set threshold is related to the amount of the laundry and the temperature difference between the inside and the outside of the drying cylinder.
  • the present embodiment cooperates with the humidity detection to determine whether the drying is completed: monitoring the humidity of the clothes, and when the humidity reaches the preset value of the humidity, detecting the temperature at different positions in the drying cylinder, and detecting the temperature according to the detection. The difference in temperature determines whether the laundry is dry or not.
  • the dry clothes dryer of the present invention starts, after heating for 5-10 minutes, the heater 4 stops heating, relies on natural cooling or indirectly cools the dry air by using a condenser, or directly supplies cold air to the dry clothes barrel 1, if detected If the temperature is low, it is considered that there is less clothing in the dryer. Otherwise, the number of clothes in the dryer is considered to be large.
  • the average value of the maximum and minimum values of all the measurement points can be used as the division interval between the high and low temperatures. point.
  • the heater 4 continues to heat.
  • the temperature of the cylinder is detected to be higher than 35 ° C, it is judged whether the laundry is dry.
  • multiple measurements can be made.
  • the heating is stopped, the temperature in the cylinder is cooled. After that, the temperature point is detected from the previous unevenness and becomes uniform, and it can be judged that the laundry is dried.
  • Unevenness refers to the temperature value of the measuring point, which is 1 °C lower than the value of the adjacent temperature point. It is considered that this area is different from the dryness of other areas due to the influence of moisture.
  • the drying degree of the clothes is relatively uniform, and the difference cannot be determined even by the cold air. In this case, it is necessary to determine the speed at which the temperature is lowered after the cold air is blown. The higher the humidity, the faster the temperature is lowered, and the clothes are judged to be dry depending on the speed of the temperature drop.
  • the determination of the speed of the temperature drop can be set to a different threshold depending on the amount of the laundry and the temperature of the air outside the cylinder.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

L'invention concerne un procédé de détermination de siccité pour un sèche-linge. Le procédé consiste à : détecter, lorsque le séchage des vêtements démarre, des températures en différentes positions d'un tambour (1) de séchage de vêtements; et, en fonction des différences de température détectées, déterminer si le séchage de vêtements est achevé ou non. En outre, la détection des températures aux différentes positions du tambour (1) de séchage de vêtements consiste à : détecter les températures de M*N positions du tambour (1) de séchage de vêtements par un capteur infrarouge (2) de température de manière matricielle; et comparer spécifiquement les valeurs de température détectées avec une température à l'extérieur du tambour pour déterminer si le séchage des vêtements est terminé ou non, ou obtenir la différence entre la valeur maximale et la valeur minimale des températures détectées; et lorsque cette valeur de différence tombe dans une plage prédéfinie, déterminer que le séchage des vêtements est achevé. Pendant le processus de séchage des vêtements, la détection est mise en oeuvre de nombreuses fois; et lorsqu'il est détecté que les différences de température entre des points de mesure de température varient d'une grande valeur à une petite valeur, ou que la vitesse de réduction de température des points de mesure varie d'une grande valeur à une petite valeur, il est déterminé que les vêtements sont secs. Ce procédé de détermination de siccité présente une précision élevée, permet de prévenir que les vêtements soient brûlés, permet un séchage uniforme des vêtements et d'améliorer l'efficacité du séchage des vêtements.
PCT/CN2017/097874 2016-08-29 2017-08-17 Procédé de détermination de siccité pour sèche-linge WO2018040931A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610753719.1A CN106854827B (zh) 2016-08-29 2016-08-29 一种干衣机判干方法
CN201610753719.1 2016-08-29

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CN112921612A (zh) * 2019-12-06 2021-06-08 青岛海尔滚筒洗衣机有限公司 带干衣功能的衣物处理设备及其干衣时间估算方法、模块
CN113316668A (zh) * 2019-01-10 2021-08-27 Lg电子株式会社 具有感应加热器的衣物处理装置及其控制方法

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CN106854827B (zh) * 2016-08-29 2020-11-03 青岛海尔滚筒洗衣机有限公司 一种干衣机判干方法
CN106637870B (zh) * 2016-11-29 2020-05-19 无锡小天鹅电器有限公司 烘干装置及其的控制方法
CN109423873B (zh) * 2017-08-23 2021-10-26 青岛海尔洗涤电器有限公司 一种干衣机的控制方法及干衣机
TWI782087B (zh) * 2017-09-28 2022-11-01 日商松下知識產權經營股份有限公司 送風裝置
WO2019169620A1 (fr) * 2018-03-09 2019-09-12 友隆电器工业(深圳)有限公司 Procédé et dispositif de détection d'un vêtement humide
CN110387725A (zh) * 2018-04-23 2019-10-29 青岛海尔滚筒洗衣机有限公司 一种干衣机的滚筒及具有该滚筒的干衣机
JP6839141B2 (ja) * 2018-08-09 2021-03-03 陳 俊 宇 湿衣類の検知方法及び検知装置
CN111197242B (zh) * 2018-11-19 2023-02-17 青岛海尔洗涤电器有限公司 一种用于家电设备的生命体检测方法及家电设备
CN112210955B (zh) * 2019-07-10 2023-08-01 青岛海尔滚筒洗衣机有限公司 洗涤设备及洗涤设备水温检测控制方法
CN110965295B (zh) * 2019-11-21 2024-06-18 青岛海尔滚筒洗衣机有限公司 一种中途添衣的干衣方法及干衣设备
CN112832000B (zh) * 2019-11-22 2022-07-15 漳州灿坤实业有限公司 衣物护理机及其控制方法
CN112553847B (zh) * 2020-12-01 2022-03-08 安徽金帅洗衣机有限公司 温度保护机构及干衣机
CN112760902A (zh) * 2020-12-25 2021-05-07 珠海格力电器股份有限公司 一种洗涤筒组件、控制方法及洗干机
CN114182507B (zh) * 2021-11-30 2022-07-26 珠海格力电器股份有限公司 一种烘干除皱方法及洗干一体机
CN115012188B (zh) * 2022-05-25 2023-11-03 无锡小天鹅电器有限公司 衣物处理设备及其烘干控制方法、装置及存储介质

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CN106854827A (zh) * 2016-08-29 2017-06-16 青岛海尔滚筒洗衣机有限公司 一种干衣机判干方法

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CN113316668A (zh) * 2019-01-10 2021-08-27 Lg电子株式会社 具有感应加热器的衣物处理装置及其控制方法
CN113316668B (zh) * 2019-01-10 2023-08-18 Lg电子株式会社 具有感应加热器的衣物处理装置及其控制方法
CN112921612A (zh) * 2019-12-06 2021-06-08 青岛海尔滚筒洗衣机有限公司 带干衣功能的衣物处理设备及其干衣时间估算方法、模块
CN112921612B (zh) * 2019-12-06 2024-04-12 上海海尔洗涤电器有限公司 带干衣功能的衣物处理设备及其干衣时间估算方法、模块

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