WO2018040931A1 - 一种干衣机判干方法 - Google Patents

一种干衣机判干方法 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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Prior art keywords
temperature
drying
detected
laundry
clothes
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English (en)
French (fr)
Inventor
宋华诚
许升
田书君
赵志强
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Qingdao Haier Drum Washing Machine Co Ltd
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Qingdao Haier Drum Washing Machine Co Ltd
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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

一种干衣机判干方法，干衣开始，检测干衣筒（1）内不同位置的温度，根据检测到的温度差异判断衣物是否干燥完成。进一步的，检测干衣筒（1）内不同位置的温度包括：通过红外温度传感器（2）以矩阵方式检测干衣筒（1）内M*N个位置的温度。具体为：将检测的温度数值与出筒温度比较判断衣物是否干燥完成，或者，将检测到温度的最大值和最小值求差，当该差值落入预设范围，则判断衣物干燥完成。在干衣过程中，进行多次测量，当检测到温度测量点的温度差异从大变小，或者测量点的温度降低率从大变小，则判断衣物干燥。该判干方法判断精度高、保护衣物免受烫伤，使得干衣均匀，提高了干衣效率。

Description

一种干衣机判干方法 技术领域
本发明涉及烘干设备，具体是一种干衣机，尤其是一种干衣机判干方法。
背景技术
干衣机顾名思义是将衣物进行干燥的一种装置，干衣机的问世，给人们生活带来了极大的便利，使人们在阴雨天也能得到干爽的衣物。
在用于衣物干燥机或者洗衣干衣机的干衣机构中，生成加热空气的装置大多采用通过加热器来加热空气的加热方式。现有电热式干衣机一般采用加热丝或加热管作为热源，此类产品能耗高，干衣时间长且安全性差。为了降低能耗，开发出了热泵式干衣机，使用热泵系统，加强对热量的循环利用，提高热量的利用效率，降低电能的消耗。
目前干衣机的判干方法主要有以下三种：1)通过衣物湿度传感器直接测试衣物含水率进行判断的方法，衣物湿度传感器分为电阻式和电容式，不同的湿度对应不同的阻值或容值，此种控制方法需要大量试验进行验证，使之对应，但是，衣物湿度传感器有个特点，就是随着使用时间增加，阻值或容值会发生漂移，这样就导致测试值与实际值存在偏差，另外，在实际运用中也会遇到判断不准的情况，如负载被大物件包裹，大物件已经干燥，但被包裹的负载仍旧潮湿，如此失效情况下也会导致负载烘干不足等异常情况，对小衣物干燥时，衣物与传感器接触的几率小，会导致测量结果不准确，容易误判衣物已经干燥。或者在干燥牛仔裤等厚度不均匀的衣物时，存在检测部位的布料已经干燥，而裤腿翻边、口袋等重叠部位按照原有检测程序结束后没有完全干燥；2)通过检测进出干燥筒的进风温度和出风温度进行判断，当进风温度与出风温度温差达到某个设定值后，再延时一段时间，干衣过程结束；3)通过测试干燥筒的出风口温度和出风口相对湿度综合判断干衣机结束条件。
利用温度传感器判断负载干燥程度的方法比较简单，是在标准环境标准容量负载下，运行一设定的干衣时间或者一设定温度。例如加热器额定功率为1600W、额定容量为6kg的滚筒式干衣机，使用标准能耗程序将标准6kg的棉负载烘干至4％的最终含水率，程序设定运行180分钟或者出风口温度设定50℃，当运行时间或者出风口温度任一值达到设定值时，干衣机停止加热。这种方法需要严格执行衣物的种类和质量，但是，用户在使用干衣机时，放入滚筒内衣物的种类、质量、初始含水率都是不确定的，因此对干衣机的判断精度要求很高， 否则会导致衣物烘不干，或者干衣时间过长，这样会导致用户的使用预期偏差。
申请号为CN201020104047.X的中国专利公开了一种基于称重法的干衣过程智能模糊控制装置，该智能模糊控制装置通过不断测试负载重量，通过模糊算法来判断负载干燥程度。该智能模糊控制装置的使用范围较窄，当干燥筒工作时，干燥筒为连续旋转状态或停止时间非常短暂，这给测量重量增加了很大的困难，而且测量结果也存在一定的误差。
申请号为CN200910210029.1的中国专利公开了一种热泵干衣机及热泵干衣机的控制方法，该控制方法包括以下步骤，提供一干燥腔体，控制由干燥腔体离开的气体排出热泵干衣机之外，判断干燥腔体的动作是否符合一预定条件。若干燥腔体的运作符合预定条件，则控制由干燥腔体离开的气体回流至干燥腔体。该控制方法是通过测量衣物的湿度和进风绝对含湿量、出风绝对含湿量以及进风温度、回风温度、进风同回风温度之间等，该控制方法同样存在着由于使用时间长久而导致的测量偏差问题，进而影响干衣机的工作性能。
有鉴于此特提出本发明。
发明内容
本发明要解决的技术问题在于克服现有技术的不足，提供一种判断精度高、保护衣物免受烫伤、干衣均匀、效果好的干衣机判干方法。
为解决上述技术问题，本发明采用技术方案的基本构思是：一种干衣机判干方法，包括：干衣开始，检测干衣筒内不同位置的温度，根据检测到的温度差异判断衣物是否干燥完成。
进一步的，检测干衣筒内不同位置的温度包括：通过红外温度传感器以矩阵方式检测干衣筒内M*N个位置的温度。
红外温度传感器具有多个红外测量点，以矩阵方式检测各点的温度，M、N的选取与红外温度传感器的型号有关，优选为8*8-32*32。本发明通过采用非接触式红外传感测量筒内多个温度点判断衣物干燥的方法，测量更精确。
进一步的，根据检测到的温度差异判断衣物是否干燥完成包括：获取检测到的温度最小值并与出筒温度比较，当检测到的温度最小值大于或等于出筒温度或比较后的差值落入预设范围内，则衣物干燥完成；
优选的，出筒温度为检测的干衣筒内最接近出筒位置的温度值。
进一步的，根据检测到的温度差异判断衣物是否干燥完成包括：选取矩阵中至少一列中的温度最小值与出筒温度比较，当检测到的温度最小值大于或等于出筒温度或比较后的差值 落入预设范围内，则衣物干燥完成；
优选的，选取任一列中的温度最小值与出筒温度比较；更优选的，选取中间任一列中的温度最小值与出筒温度比较。
进一步的，根据检测到的温度差异判断衣物是否干燥完成包括：获取检测到温度的最大值和最小值并求差，当该差值落入预设范围，则衣物干燥完成。
进一步的，根据检测到的温度差异判断衣物是否干燥完成包括：获取矩阵中至少一行中的温度的最大值和最小值并求差，当该差值落入预设范围，则衣物干燥完成。
进一步的，根据检测到的温度差异判断衣物是否干燥完成包括：在干衣过程中，进行多次测量，当检测到温度测量点的温度差异从大变小或者测量点的温度降低率从大变小，则判断衣物干燥。
进一步的，干衣开始，先判断衣物量，具体为：
干衣执行设定时间后，检测干衣筒内不同位置的温度，检测的温度低点数量少于设定数值时，判断衣物量少，否则，判断衣物量多，
其中，温度低点为温度测量点比周围测量点温度低的点，或者，先计算干衣筒内各测量点检测的温度最大值和最低值的平均值，定义检测温度值低于该平均值的测量点为温度低点。
进一步的，检测干衣筒内不同位置的温度之前，先停止加热，自然冷却衣物或提供冷风冷却衣物设定时间后再检测温度；
优选的，提供冷风冷却干衣筒内温度的方式包括：利用冷凝器给烘干空气换热间接冷却，或直接向干衣筒内供应冷风。
进一步的，在检测过程中，多次的温度检测未发现测量点温度差异，则需要根据通冷风后温度下降的速度进行判定，设定时间段内检测温度下降的的变化值与设定阈值比较，若大于设定阈值，则判断湿度大，干燥未完成，否则为干燥完成，设定阈值与衣物量多少、干衣筒内外温度差有关。
进一步的，根据检测到的温度差异判断衣物是否干燥完成之前还包括：对衣物的湿度进行监测，当湿度达到湿度预设值时，再检测干衣筒内不同位置的温度，并根据检测到的温度差异判断衣物是否干燥完成。
进一步的，干衣开始后，检测靠近干衣筒出口的温度达到温度预设值时，开始进行衣物 干燥判断。
采用上述技术方案后，本发明与现有技术相比具有以下有益效果。
本发明通过检测干衣筒内不同位置的温度，也即能够检测衣物不同部位的温度，根据检测到的温度差异，获得衣物干燥的均匀程度，进而判断衣物是否干燥完成，尤其是对于干燥一些厚度不均匀的衣物如牛仔裤，具有非常好的干衣效果，能够避免衣物局部并未干燥而完成干衣的情况，也避免了延长干衣时间对衣物造成的损伤。
本发明还在判干之间，先停止对干衣筒内衣物加热，待筒内降温后再检测各点的温度，根据检测到的温度差异判断衣物是否干燥完成，温度差异包括检测点自身温度下降的速度变化、各点之间温差变化、检测点温度变化与设定参数或出风温度的差异等均能判断衣物是否干燥。
下面结合附图对本发明的具体实施方式作进一步详细的描述。
附图说明
附图作为本发明的一部分，用来提供对本发明的进一步的理解，本发明的示意性实施例及其说明用于解释本发明，但不构成对本发明的不当限定。显然，下面描述中的附图仅仅是一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图。在附图中：
图1是本发明干衣机示意图；
图中：1、干衣筒；2、红外温度传感器；3、衣物投放口；4、加热器。
需要说明的是，这些附图和文字描述并不旨在以任何方式限制本发明的构思范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对实施例中的技术方案进行清楚、完整地描述，以下实施例用于说明本发明，但不用来限制本发明的范围。
本发明所述的干衣机判干方法，干衣开始后，检测干衣筒内不同位置的温度，根据检测到的温度差异判断衣物是否干燥完成。
优选为，通过红外检测的方式，红外温度传感器2以矩阵方式检测干衣筒内M*N个位置 的温度，检测干衣筒内衣物不同部位的温度差异，判断衣物的各个部位是否都已经干燥完成，也即检测衣物是否均匀干燥，从而判断筒内衣物是否干燥完成。
如图1所示，红外温度传感器2安装在干衣筒1的前上方，也即衣物投放口3的上方，具有多个红外测量点，可以检测正对筒内M*N个位置的温度值，M、N的选取与红外温度传感器的型号有关，也与干衣筒1的容量有关。本发明采用非接触式红外传感测量筒内8*8或16*16的温度点判断衣物干燥的方法，测量更精确。以8*8矩阵检测温度为例，但不局限于8*8矩阵检测温度，如下表所示，Tij表示第i行第j列测量点的温度，1≤i、j≤8。进行温度检测时，干衣机干衣筒停止旋转，以使检测温度时衣物处于稳定状态，提高检测的精确性。
T11 T12 T13 T14 T15 T16 T17 T18
T21 T22 T23 T24 T25 T26 T27 T28
T31 T32 T33 T34 T35 T36 T37 T38
T41 T42 T43 T44 T45 T46 T47 T48
T51 T52 T53 T54 T55 T56 T57 T58
T61 T62 T63 T64 T65 T66 T67 T68
T71 T72 T73 T74 T75 T76 T77 T78
T81 T82 T83 T84 T85 T86 T87 T88
实施例一
本实施例将检测的温度数值与出筒温度比较判断衣物是否干燥完成。具体为：
干衣开始后，当检测靠近干衣筒出口的温度高于温度预设值如35℃时，再进行衣物干燥均匀性判断。由于衣物干燥均匀后，筒内衣物的温度从进风口到出风口会逐步降低，由于水在蒸发过程中吸收热量，会导致局部温度低于出筒温度，因此，如果检测筒内存在局部温度小于出风温度，则说明此局部部位的衣物含有没有被蒸发的水，判断衣物没有干燥完成；如果检测到的温度最小值大于出筒温度，则判定衣物干燥均匀，干燥完成。
或者，为了缩短干衣时间，不需要上述精准的判干方式，允许一定的偏差量，例如，检测筒内各测量点温度与出筒温度的差值∣△T∣小于1℃，则判定衣物干燥均匀。
实施例二
本实施例为实施例一的简化判断：选取矩阵中一列的温度进行判断，例如检测第4列测 量点温度数值Ti4与出筒温度比较，如果差值∣△T∣小于1℃，则判断衣物干燥。
本实施例中也可以选取矩阵中至少两列中的温度最小值与出筒温度比较，当检测到的温度最小值大于或等于出筒温度或比较后的差值落入预设范围内，则衣物干燥完成。
本发明出筒温度可以为另外设置的温度传感器检测的出风口温度，也可以为红外温度传感器检测最接近出筒位置的温度值。
实施例三
本实施例将检测到温度的最大值和最小值求差，当该差值落入预设范围，则判断衣物干燥完成。
优选的，获取矩阵中至少一行中的温度的最大值和最小值并求差，当该差值落入预设范围，则衣物干燥完成。
检测第i行测量点温度的最小值Tmin(i)与该行的最大值Tmax(i)比较计算差值，如果差值小于∣△Ti∣，例如∣△Ti∣设定为1℃，则判断衣物干燥。
进一步的，为简化判断，可以选取中间位置的温度进行判断，例如检测第4行的最小温度数值Tmin(4)与该行的最大值Tmax(4)比较，如果差值小于∣△T4∣，∣△T4∣设定1℃，则判断衣物干燥。
实施例四
本实施例为上述实施例的改进，在干衣过程中，进行多次测量，当检测到温度测量点的温度差异从大变小，或者测量点的温度降低率从大变小，则判断衣物干燥。
实施例五
由于衣物量的多少也会有影响衣物判干的效果，因此本实施例需要判断衣物量，具体为：
干衣开始后，先不进行干燥判断，先判断衣物量，加热干衣设定时间后，检测干衣筒内不同位置的温度，检测的温度低点数量少于设定数值时，判断衣物量少，否则，判断衣物量多。
其中，温度低点为温度测量点比周围测量点温度低的点，或者，先计算干衣筒内各测量点检测的温度最大值和最低值的平均值，定义检测温度值低于该平均值的测量点为温度低点。
实施例六
本发明检测干衣筒内不同位置的温度之前，先停止加热，依靠自然冷却衣物或提供冷风 冷却衣物设定时间后再检测温度，这是因为潮湿的衣物在停止加热会因衣物内水分的蒸发吸收热量，其温度下降速度高于干衣筒内没有被衣物覆盖部分。
优选的，提供冷风冷却干衣筒内温度的方式包括：利用冷凝器给烘干空气换热间接冷却，或直接向干衣筒内供应冷风。
本实施例在上述实施例检测衣物量和每次判断衣物干燥前执行，先停止加热，冷却筒内温度，再检测衣物或判断是否干燥完成。
实施例七
本实施例在检测过程中，若多次的温度检测未发现上述实施例中所述的测量点温度差异，则需要根据通冷风后温度下降的速度进行判定，设定时间段内检测温度下降的的变化值与设定阈值比较，若大于设定阈值，则判断湿度大，干燥未完成，否则为干燥完成，设定阈值与衣物量多少、干衣筒内外温度差有关。
实施例八
本实施例在上述实施例的基础上，配合湿度检测判断是否干燥完成：对衣物的湿度进行监测，当湿度达到湿度预设值时，再检测干衣筒内不同位置的温度，并根据检测到的温度差异判断衣物是否干燥完成。
本发明干衣机干衣开始，加热5-10分钟后，加热器4停止加热，依靠自然冷却或利用冷凝器给烘干空气间接冷却，或直接往干衣筒1内供应冷风，若检测的温度低点较少，则认为干衣机内衣物较少，否则认为干衣机内衣物数量较多，这里可以将全部测量点的温度最大值和最低值的平均值作为区分高低温度的划分区间点。
判断完衣物量后，加热器4继续加热，当检测出筒温度高于35℃时，开始判断衣物是否干燥，在干衣机运行中，可以进行多次测量，当加热停止，筒内温度冷却后，检测温度点从之前的不均匀，变得均匀，则可以判断衣物干燥完成。
不均匀是指测量点的温度值，与相邻温度点的值有一个低出1℃，则认为这个区域因为水分影响与其他区域干燥程度不同。
如果在检测过程中，几次的温度检测没有发现温度点差异，说明衣物的干燥程度比较一致，即使通过通冷风也无法判定区别。这种情况下则需要根据通冷风后温度下降的速度进行判定，湿度越大，温度降低的速度越快，根据温度下降的快慢判定衣物是否干燥。温度下降快慢的判定可以根据衣物量的多少和筒内筒外空气温度不同而设置不同的阈值。
以上所述仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专利的技术人员在不脱离本发明技术方案范围内，当可利用上述提示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明方案的范围内。

Claims (12)

  1. 一种干衣机判干方法，其特征在于，包括：
    干衣开始，检测干衣筒内不同位置的温度，根据检测到的温度差异判断衣物是否干燥完成。
  2. 根据权利要求1所述的干衣机判干方法，其特征在于，检测干衣筒内不同位置的温度包括：
    通过红外温度传感器以矩阵方式检测干衣筒内M*N个位置的温度。
  3. 根据权利要求1所述的干衣机判干方法，其特征在于，根据检测到的温度差异判断衣物是否干燥完成包括：
    获取检测到的温度最小值并与出筒温度比较，当检测到的温度最小值大于或等于出筒温度或比较后的差值落入预设范围内，则衣物干燥完成；
    优选的，出筒温度为检测的干衣筒内最接近出筒位置的温度值。
  4. 根据权利要求2所述的干衣机判干方法，其特征在于，根据检测到的温度差异判断衣物是否干燥完成包括：
    选取矩阵中至少一列中的温度最小值与出筒温度比较，当检测到的温度最小值大于或等于出筒温度或比较后的差值落入预设范围内，则衣物干燥完成；
    优选的，选取任一列中的温度最小值与出筒温度比较；更优选的，选取中间任一列中的温度最小值与出筒温度比较。
  5. 根据权利要求1所述的干衣机判干方法，其特征在于：根据检测到的温度差异判断衣物是否干燥完成包括：
    获取检测到温度的最大值和最小值并求差，当该差值落入预设范围，则衣物干燥完成。
  6. 根据权利要求2所述的干衣机判干方法，其特征在于，根据检测到的温度差异判断衣物是否干燥完成包括：
    获取矩阵中至少一行中的温度的最大值和最小值并求差，当该差值落入预设范围，则衣物干燥完成。
  7. 根据权利要求1所述的干衣机判干方法，其特征在于，根据检测到的温度差异判断衣物是否干燥完成包括：在干衣过程中，进行多次测量，当检测到温度测量点的温度差异从大变小或者测量点的温度降低率从大变小，则判断衣物干燥。
  8. 根据权利要求1-7任一所述的干衣机判干方法，其特征在于，干衣开始，先判断衣物量，具体为：
    干衣执行设定时间后，检测干衣筒内不同位置的温度，检测的温度低点数量少于设定数值时，判断衣物量少，否则，判断衣物量多，
    其中，温度低点为温度测量点比周围测量点温度低的点，或者，先计算干衣筒内各测量点检测的温度最大值和最低值的平均值，定义检测温度值低于该平均值的测量点为温度低点。
  9. 根据权利要求1-8任一所述的干衣机判干方法，其特征在于，检测干衣筒内不同位置的温度之前，先停止加热，自然冷却衣物或提供冷风冷却衣物设定时间后再检测温度；
    优选的，提供冷风冷却包括：利用冷凝器给烘干空气换热间接冷却，或直接向干衣筒内供应冷风。
  10. 根据权利要求9所述的干衣机判干方法，其特征在于，在检测过程中，多次的温度检测未发现测量点温度差异，则需要根据通冷风后温度下降的速度进行判定，设定时间段内检测温度下降的的变化值与设定阈值比较，若大于设定阈值，则判断湿度大，干燥未完成，否则为干燥完成，设定阈值与衣物量多少、干衣筒内外温度差有关。
  11. 根据权利要求1-10任一所述的干衣机判干方法，其特征在于，根据检测到的温度差异判断衣物是否干燥完成之前还包括：对衣物的湿度进行监测，当湿度达到湿度预设值时，再检测干衣筒内不同位置的温度，并根据检测到的温度差异判断衣物是否干燥完成。
  12. 根据权利要求1-11任一所述的干衣机判干方法，其特征在于，干衣开始后，检测靠近干衣筒出口的温度达到温度预设值时，开始进行衣物干燥判断。
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