WO2018050012A1 - 一种干衣机控制方法 - Google Patents

一种干衣机控制方法 Download PDF

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Publication number
WO2018050012A1
WO2018050012A1 PCT/CN2017/100706 CN2017100706W WO2018050012A1 WO 2018050012 A1 WO2018050012 A1 WO 2018050012A1 CN 2017100706 W CN2017100706 W CN 2017100706W WO 2018050012 A1 WO2018050012 A1 WO 2018050012A1
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Prior art keywords
temperature
compressor
frequency
ambient temperature
dryer
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PCT/CN2017/100706
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English (en)
French (fr)
Inventor
许升
宋华诚
田书君
单世强
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青岛海尔滚筒洗衣机有限公司
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Publication of WO2018050012A1 publication Critical patent/WO2018050012A1/zh

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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
    • D06F2103/08—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
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
    • 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
    • D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/26—Heat pumps
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/56—Remaining operation time; Remaining operational cycles
    • 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
    • D06F58/48—Control of the energy consumption
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention relates to the field of dry clothes, and more particularly to a dryer control method.
  • the inverter compressor After rising to the first frequency (ie, the target frequency) in the initial stage, reduces the frequency of the compressor according to the increase of the load of the compressor. However, if the ambient temperature is low, the compressor will run at the first frequency (target frequency). If it can be judged in advance that the compressor is in a low temperature environment and increase the first operating frequency (target frequency) of the compressor, Helps increase the temperature of the dryer and shorten the drying time. Conversely, in a high temperature environment, a slight decrease in the first frequency (target frequency) helps to save energy.
  • the patent application No. 201510014802.2 discloses a control method of a variable frequency heat pump dryer, which comprises at least two dry clothes modes: a first dry clothes mode and a second dry clothes mode, in the first dry clothes mode
  • the high frequency section of the compressor runs longer than the high frequency section of the inverter compressor in the second dryer mode.
  • the inverter compressor includes an up frequency phase, a frequency maintenance phase, a frequency reduction phase, a frequency reduction phase, and a compressor frequency setting.
  • the target frequency gradually decreases to the end of drying, and the first dry clothes mode is higher than the second dry mode by the set target frequency gradually decreasing stepwise.
  • the first dry-coating module in this patent solves the problem of quick-drying because of the high-frequency running time of the compressor.
  • the solution for shortening the drying time only by extending the high-frequency operation time of the compressor is relatively simple, and is susceptible to the ambient temperature. The effect of the drying time of the dryer will vary greatly depending on the ambient temperature.
  • 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 provide a drying machine control method.
  • the high frequency operating frequency of the compressor is set, and the higher the ambient temperature, the higher the temperature is.
  • the lower the high frequency operating frequency of the fixed compressor the lower the influence of the ambient temperature on the drying time, the shorter the drying time of the clothes in the low temperature environment, and the energy saving in the high temperature environment.
  • a dryer control method the dryer is a heat pump dryer, the compressor is an inverter compressor, and the dryer control method comprises: determining an ambient temperature of the dryer, and setting compression according to the judgment result The target frequency of the machine, the higher the ambient temperature, the lower the target frequency of the set compressor.
  • the target frequency of the compressor is set by the ambient temperature, and the influence of the ambient temperature on the drying time and the drying efficiency is lowered.
  • the compressor is in the low temperature environment to improve the target frequency of the compressor. It helps to increase the temperature of the dryer and shorten the drying time.
  • the target frequency is slightly lowered, which helps to save energy.
  • variable frequency compressor comprises an up frequency phase, a frequency maintenance phase, and a frequency reduction phase;
  • the compressor operating frequency gradually rises from a low speed to a set target frequency, wherein the higher the ambient temperature, the lower the target frequency is;
  • the compressor frequency gradually decreases from the set target frequency according to the detected temperature.
  • the ambient temperature T is determined based on the detected compressor discharge temperature Td and the condenser outlet temperature Tc;
  • ⁇ T
  • is calculated, and the ambient temperature T is determined according to the magnitude of ⁇ T, preferably 26 °C ⁇ T1 ⁇ 32 °C.
  • the ambient temperature is determined by the compressor discharge temperature and the condenser outlet temperature, and the temperature sensor inside the dryer is used to judge the ambient temperature, thereby avoiding the need to detect the external ambient temperature, and the special connection is set.
  • the temperature sensor outside the dryer reduces the space occupied by the temperature detection module and simplifies the structure of the dryer
  • the ambient temperature is divided into multiple gears, and the ambient temperature of the different gear positions corresponds to different target frequencies, and the higher the gear position corresponding to the ambient temperature, the lower the set target frequency of the compressor.
  • the ambient temperature is divided into multiple gears, and the number of target frequencies is reduced.
  • the ambient temperature is divided into three gear positions.
  • the gear position corresponding to the ambient temperature is determined according to the detected compressor exhaust gas temperature Td and the condenser outlet temperature Tc, and the gear position corresponding to the ambient temperature is divided into a low temperature environment, a medium temperature environment, and a high temperature environment;
  • the target frequency of the compressor corresponding to the low temperature environment is K1
  • the target frequency of the compressor corresponding to the medium temperature environment is K2
  • the target frequency of the compressor corresponding to the high temperature environment is K3, K1>K2>K3, preferably, 68Hz ⁇ K1 ⁇ 72Hz , 58 Hz ⁇ K2 ⁇ 65 Hz, 50 Hz ⁇ K3 ⁇ 56 Hz.
  • the frequency reduction phase adopts segmentation control: the frequency of the inverter compressor is divided into multiple stages, and the detection temperature is also divided into multiple stages, and each stage of the frequency drop of the inverter compressor is respectively associated with the detection temperature, and the detection is performed.
  • the frequency of the inverter compressor decreases from the target frequency f to f1
  • the frequency of the inverter compressor decreases from f1 to f2
  • the cycle continues until the detected temperature rises to At T1m, the frequency of the inverter compressor drops from f(m-1) to fm until the end of the drying.
  • the detected temperature refers to the detected dryer inlet temperature, or the outlet temperature, or the compressor discharge temperature, or the evaporator temperature, or the condenser outlet temperature, or the condenser surface temperature, preferably The detected temperature is the detected condenser surface temperature.
  • the ambient temperature is directly detected by the ambient temperature sensor or indirectly by the temperature sensor of the compressor system.
  • the present invention has the following beneficial effects compared with the prior art:
  • the dryer is a heat pump dryer
  • the compressor is an inverter compressor
  • the dryer control method comprises: determining an ambient temperature at which the dryer is located, according to the judgment result, Set the target frequency of the compressor. The higher the ambient temperature, the lower the target frequency of the set compressor.
  • the compressor will increase in time at the first frequency (target frequency), and at higher ambient temperatures, because the first frequency (target frequency) is fixed. Values will waste power.
  • the dryer adopts the control method of the invention, when the ambient temperature is low, the compressor increases the first operating frequency (target frequency), thereby facilitating the temperature increase of the dryer and shortening the drying time.
  • slightly lowering the first frequency (target frequency) helps to save energy.
  • the judgment of the ambient temperature is directly judged by the ambient temperature sensor or indirectly by the temperature sensor of the compressor system.
  • the invention is preferably determined indirectly by the temperature sensor of the compressor system, for example, by using the compressor exhaust temperature and the condenser outlet temperature.
  • the ambient temperature is obtained, thereby avoiding the need to specifically connect the temperature sensor disposed outside the dryer because the external ambient temperature is to be detected, which simplifies the space occupied by the temperature detecting module and simplifies the structure of the dryer.
  • the compressor gradually decreases from the set target frequency to the end of drying according to the detected temperature, wherein the detected temperature refers to the detected dryer inlet temperature, or the outlet temperature, or the compressor discharge temperature. , or evaporator temperature, or condenser outlet temperature, or condenser surface temperature.
  • the detected temperature is the detected condenser surface temperature.
  • the ambient temperature is divided into multiple gears, and the ambient temperatures of different gears correspond to different target frequencies.
  • the ambient temperature is divided into three levels of a low temperature environment, a medium temperature environment, and a high temperature environment, and the ambient temperatures of the different gears respectively correspond to different compressor target frequencies, thereby setting a suitable target frequency for different ambient temperatures, thereby realizing quick drying. And the purpose of energy saving.
  • FIG. 1 is a flow chart showing the control method of the dryer of the present invention.
  • mounting and "connecting” are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral, unless otherwise explicitly stated and defined.
  • Ground connection it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the invention provides a dryer control method, the dryer is a heat pump dryer, the compressor is an inverter compressor, and the existing inverter compressor is operated after rising to a first frequency (target frequency) in an initial stage.
  • the frequency of the compressor is reduced according to the increase in the load of the compressor. But if the ambient temperature is low and the compressor is running at the first frequency (target frequency) There will be an increase. If the compressor is judged to be in a low temperature environment in advance and the target frequency of the compressor is increased, it will help the temperature of the dryer to increase and shorten the drying time. Conversely, in a high temperature environment, a slight decrease in the target frequency helps to save energy.
  • the present invention improves the control method of the existing clothes dryer, and obtains a drying clothes control method in which the drying time or efficiency is less affected by the ambient temperature: determining the ambient temperature at which the clothes dryer is located, according to the judgment result, Set the target frequency of the compressor. The higher the ambient temperature, the lower the target frequency of the set compressor.
  • the inverter compressor includes an up-conversion phase, a frequency-holding phase, and a frequency-down phase, wherein in the up-conversion phase, after the compressor is started, the compressor operating frequency gradually rises from a low speed to a low speed Set the target frequency (ie the highest operating frequency) instead of directly operating at the highest operating frequency.
  • the rise of the compressor is divided into multiple stages. After rising to each frequency stage, it runs for 0.5 to 3 minutes and then rises to another.
  • the maximum speed is not directly raised here: in order to prevent the oil inside the compressor from suddenly rising in the frequency, the amount of oil returning from the heat exchanger to the compressor is less than the amount of oil discharged, resulting in poor lubrication.
  • the compressor frequency is gradually decreased from the set target frequency to the end of drying according to the detected temperature.
  • the target frequency is slightly lowered, which helps to save energy.
  • the determination of the ambient temperature can be directly judged by the ambient temperature sensor or indirectly by the temperature sensor of the compressor system.
  • the embodiment provides a method for indirectly determining the ambient temperature through a temperature sensor of the compressor system.
  • the temperature sensor includes two, respectively disposed on the compressor and the condenser, and separately collects the compressor exhaust temperature Td.
  • the ambient temperature T is determined by collecting the condenser outlet temperature Tc.
  • the ambient temperature is divided into multiple gears in the present invention, and the ambient temperature of different gear positions corresponds to different target frequencies.
  • the corresponding gear position is divided into three gears of low temperature environment, medium temperature environment and high temperature environment, and the gear position corresponding to the ambient temperature is determined according to the detected compressor discharge temperature Td and the condenser outlet temperature Tc.
  • the specific judgment method is as follows:
  • the target frequency of the compressor corresponding to the low temperature environment is K1
  • the target frequency of the compressor corresponding to the medium temperature environment is K2
  • the target frequency of the compressor corresponding to the high temperature environment is K3, K1>K2>K3, preferably, 68Hz ⁇ K1 ⁇ 72Hz, 58 Hz ⁇ K2 ⁇ 65 Hz, 50 Hz ⁇ K3 ⁇ 56 Hz.
  • the present invention indirectly determines the ambient temperature by the temperature sensor of the compressor system, which is not affected by the temperature change caused by the drying operation of the dryer, the result of the detection is reliable, and because the dryer is utilized
  • the internal temperature sensor judges the ambient temperature and avoids the temperature sensor that is externally connected to the dryer because it detects the external ambient temperature, which simplifies the space occupied by the temperature detection module and simplifies the dryer. structure.
  • the correspondence between the ambient temperature gear detected in the present invention and the optimal target frequency of the compressor is as follows:
  • the present invention is not limited to determining the ambient temperature range by using the compressor discharge temperature Td and the condenser outlet temperature Tc.
  • the ambient temperature range can also be determined directly by the ambient temperature sensor, such as external temperature on the dryer.
  • the sensor directly determines the ambient temperature with the ambient temperature sensor.
  • the external temperature sensor needs to be away from the high temperature or low temperature zone of the dryer, but is set to the same temperature in the outside environment. The position allows the external temperature sensor to detect the ambient temperature rather than the dryer internal temperature.
  • the inverter compressor includes three stages of an up-conversion phase, a frequency-holding phase, and a down-conversion phase. After the inverter compressor is started, the compressor operating frequency gradually rises from a low speed to a set target frequency, wherein the higher the ambient temperature is, the lower the target frequency is. In the down frequency phase, the compressor frequency is set according to the detected temperature. The target frequency gradually drops to the end of drying.
  • the inverter compressor operating current value and the condenser surface temperature reflecting the condensing temperature and/or the compressor exhaust temperature value reflecting the internal temperature of the compressor are monitored, if the above current value and the above When the temperature is within the limit value, the frequency of the inverter compressor is maintained. If one of the above temperature and current values reaches the limit, the frequency is maintained, and the compressor frequency does not rise even if it does not rise to the target frequency.
  • the compressor frequency is slightly reduced, for example, the frequency is reduced by 2 Hz, thereby ensuring the safe operation of the dryer.
  • the compressor frequency is adjusted and maintained by monitoring the inverter compressor operating current value and the inverter compressor exhaust temperature value.
  • the compressor When the compressor reaches the set target frequency or reaches the maximum frequency required by the limit, it enters the frequency hold phase and operates with the set target frequency or the highest frequency required by the reached limit.
  • the compressor enters the frequency reduction stage, the frequency of the compressor is adjusted, and one or more temperature sensors are set according to the inlet temperature, the outlet temperature, the compressor, the evaporator, and the condenser. The temperature is adjusted according to time.
  • the detected temperature refers to the detected dryer inlet temperature, or the outlet temperature, or the compressor discharge temperature, or the evaporator temperature, or the condenser outlet temperature, or the condenser surface temperature, or any of the foregoing combination.
  • the detected temperature is the detected condenser surface temperature.
  • segmentation control is adopted: the frequency of the inverter compressor is divided into multiple stages, and the detection temperature is also divided into multiple stages, and each stage of the frequency drop of the inverter compressor is respectively associated with the detection temperature, and the detection is performed.
  • the frequency of the inverter compressor drops from the target frequency fnHz to f1 Hz
  • the frequency of the inverter compressor decreases from f1 Hz to f2 Hz, and thus the cycle is detected until the temperature is detected.
  • the frequency of the inverter compressor drops from f(m-1)Hz to fmHz until the drying is finished.
  • step S4 monitoring the compressor discharge temperature and the inverter compressor current is exceeded, yes, the inverter compressor frequency is reduced by 2 Hz, and proceeds to step S4, otherwise proceeds to step S5;
  • step S5 it is determined whether the detected temperature reaches T11 ° C, if yes, then proceeds to step S6, otherwise returns to step S4;
  • the inverter compressor frequency is fmHz until the drying is finished.
  • the inverter compressor frequency drops from the target speed of 60 Hz (fnHz) to 50 Hz (f1 Hz); when the condenser outlet temperature rises to 42 ° C (T12 ° C), the frequency conversion compression The frequency of the machine drops from 50Hz (f1Hz) to 40Hz (f2Hz); when the condenser outlet temperature rises to 47°C (T13°C), the frequency of the inverter compressor drops from 40Hz (f2Hz) to 30Hz (f3Hz); 30Hz (f3Hz) runs until the end of drying.
  • the drying machine control method provided by the invention adjusts the target frequency of the compressor according to the external temperature, and when the ambient temperature is low, the target frequency of the inverter compressor increases, thereby reducing the drying efficiency of the dryer under the low temperature environment and Dryer drying time, and when the ambient temperature is high, the target frequency of the inverter compressor is reduced, which saves energy during the drying process.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

一种干衣机控制方法，该干衣机为热泵干衣机，压缩机为变频压缩机，该干衣机控制方法包括判断干衣机所处的环境温度，并根据判断结果设定压缩机的目标频率，其中，环境温度越高，设定的压缩机的目标频率越低。通过采用该控制方法，降低了环境温度对干衣时间的影响，缩短了低温环境中衣物的干燥时间，有助于在高温环境中节省能耗。

Description

一种干衣机控制方法 技术领域
本发明涉及干衣领域，尤其是一种干衣机控制方法。
背景技术
日常生活中，衣物多采用自然晾晒，然而自然晾晒衣服干衣时间较长，尤其在南方梅雨季节，晾晒多天都很难干透，所以干衣机越来越受到用户的青睐，然而现有变频压缩机，在初始阶段上升到第一频率(即目标频率)运行后，根据压缩机的负荷升高，降低压缩机的频率。但如果所处的环境温度较低，压缩机在第一频率(目标频率)运行的时间会增加，如果能够提前判断压缩机处于低温环境，提高压缩机的第一运行频率(目标频率)，将有助于干衣机的温度提升，缩短干燥时间。相反，在高温环境，稍微降低第一频率(目标频率)，有助于节省能耗。
申请号为201510014802.2的专利公开了一种变频热泵干衣机控制方法，该干衣机至少包括两个干衣模式：第一干衣模式和第二干衣模式，所述第一干衣模式中压缩机的高频率段运行时间长于第二干衣模式中变频压缩机的高频率段运行时间，变频压缩机包括升频阶段、频率保持阶段、降频阶段，降频阶段，压缩机频率由设定目标频率逐渐阶段性下降至烘干结束，由设定目标频率逐渐阶段性下降对应的检测温度第一干衣模式高于第二干衣模式。该专利中第一干衣模块因为压缩机高频运行时间长可解决快速干衣的问题，然而，只通过延长压缩机高频运行的时间来缩短干燥时间的方案比较单一，且容易受到环境温度的影响，在环境温度不同的情况下，该干衣机的干燥时间会发生较大的变化。
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，提供一种干衣机控制方法，根据干衣机所处的环境温度，设定压缩机的高频运行频率，环境温度越高，设定的压缩机的高频运行频率越低，从而降低了环境温度对干衣时间的影响，缩短了低温环境中衣物的干燥时间，有助于在高温环境中节省能耗。
为解决上述技术问题，本发明采用的技术方案的基本构思是：
一种干衣机控制方法，该干衣机为热泵干衣机，压缩机为变频压缩机，该干衣机控制方法包括：判断干衣机所处的环境温度，根据判断结果，设定压缩机的目标频率，环境温度越高，设定的压缩机的目标频率越低。
在上述方案中，通过环境温度设置压缩机的目标频率，降低了环境温度对干衣时长和干衣效率的影响，在低温时，因为提前判断到压缩机处于低温环境，提高压缩机的目标频率，有助于干衣机的温度提升，缩短了干燥时间，而当洗衣机提前检测到环境温度较低时，则稍微降低目标频率，有助于节省能耗。
优选的，变频压缩机包含有升频阶段、频率保持阶段、降频阶段；
所述升频阶段，压缩机启动后，压缩机运转频率从低速逐渐上升到设定的目标频率，其中，环境温度越高对应的目标频率越低；
所述的降频阶段，压缩机频率按照检测温度由设定的目标频率逐渐下降。
优选的，根据检测的压缩机排气温度Td和冷凝器出口温度Tc判断环境温度T；
Max(Td,Tc)≤T1时，则环境温度T＝Min(Td,Tc)；
Min(Td,Tc)＞T1时，则计算△T＝|Td-Tc|，根据△T的大小确定环境温度T，优选的，26℃≤T1≤32℃。
再说上述方案中，通过压缩机排气温度和冷凝器出口温度判断环境温度，利用了干衣机内部的温度传感器进行外界环境温度的判断，避免了因为要检测外部环境温度，而专门连接设置在干衣机外部的温度传感器，减少了温度检测模块占用的空间，同时也简化了干衣机的结构
优选的，将环境温度分为多档，不同档位的环境温度对应不同的目标频率，对应环境温度越高的档位，设定的压缩机目标频率越低。
在上述方案，将环境温度分为多档，减少了目标频率的数量，其中，环境温度的档位越多，则目标频率的数量越多，控制越精细。优选的，将环境温度分为三个档位。
优选的，根据检测的压缩机排气温度Td和冷凝器出口温度Tc判断环境温度对应的档位，将环境温度对应的档位分为低温环境、中温环境、高温环境三档；
Min(Td,Tc)≤T2，则环境温度对应的档位为低温环境；
当T2＜Min(Td,Tc)≤T1，则环境温度对应的档位为中温环境；
当Min(Td,Tc)＞T1，则计算△T＝|Td-Tc|，判断△T≤△T1时，则环境温度对应的档位为高温环境，否则，△T的值越大，则环境温度越低，优选的，当△T＞△T2时，则环境温度对应的档位为低温环境，当△T1＜△T≤△T2时，则环境温度对应的档位为中温环境；
更优选的，26℃≤T1≤32℃，13℃≤T2≤18℃，0≤△T1≤5，12≤△T2≤18。
优选的，低温环境对应的压缩机目标频率为K1，中温环境对应的压缩机目标频率为K2，高温环境对应的压缩机目标频率为K3，K1＞K2＞K3，优选的，68Hz≤K1≤72Hz，58Hz≤K2≤65Hz，50Hz≤K3≤56Hz。
优选的，降频阶段采用分段控制：将变频压缩机下降频率分成多个阶段，检测温度也对应分为多档，变频压缩机下降频率的各阶段分别与检测温度各档建立对应关系，检测温度挡的温度越高，对应的下降频率段的频率越低。
优选的，降频阶段，检测温度上升到T11时，变频压缩机频率从目标频率f下降到f1，检测温度上升到T12时，变频压缩机频率从f1下降到f2,如此循环直至检测温度上升至T1m时，变频压缩机频率从f(m-1)下降到fm，直至干衣结束。
优选的，所述的检测温度是指检测的干衣机进筒温度，或出筒温度，或压缩机排气温度，或蒸发器温度，或冷凝器出口温度，或冷凝器表面温度,优选的,检测温度为检测的冷凝器表面温度。
优选的，通过环境温度传感器直接检测环境温度或通过压缩机系统的温度传感器间接判断。
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：
1、本发明的干衣机控制方法中，干衣机为热泵干衣机，压缩机为变频压缩机，该干衣机控制方法包括：判断干衣机所处的环境温度，根据判断结果，设定压缩机的目标频率，环境温度越高，设定的压缩机的目标频率越低。现有的干衣机所处的环境温度较低时，压缩机在第一频率(目标频率)运行的时间会增加，而在较高环境温度下时，因为第一频率(目标频率)是定值，则会浪费电能。而当干衣机采用本发明的控制方法时，当环境温度较低时，压缩机提高第一运行频率(目标频率)，从而有利于干衣机的温度提升，缩短干燥时间，相反的，当环境温度较高时，稍微降低第一频率(目标频率)，则有助于节省能耗。
2、环境温度的判断直接以环境温度传感器判断或通过压缩机系统的温度传感器间接判断，本发明优选通过压缩机系统的温度传感器间接判定，比如利用压缩机排气温度和冷凝器出口温度综合分析得出环境温度，从而，避免了因为要检测外部环境温度，而专门连接设置在干衣机外部的温度传感器，简化了温度检测模块占用的空间，同时也简化了干衣机的结构。本发明在降频率阶段压缩机按照检测温度由设定的目标频率逐渐下降至烘干结束，其中，检测温度是指检测的干衣机进筒温度，或出筒温度，或压缩机排气温度，或蒸发器温度，或冷凝器出口温度，或冷凝器表面温度。检测温度的方式很多也可为上述几个检测位置的任意组 合，优选的，检测温度为检测的冷凝器表面温度。
3、本发明中，将环境温度分为多档，不同的档的环境温度对应不同的目标频率，环境温度越高，对应的目标频率越低。优选的，将环境温度分为低温环境、中温环境、高温环境三档，不同档的环境温度分别对应不同的压缩机目标频率，从而针对不同的环境温度设置合适的目标频率，实现了快速干衣和节能的目的。
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
附图作为本申请的一部分，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是本发明的干衣机控制方法流程图。
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。
在本发明的描述中，需要说明的是，术语“上”、“下”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
本发明的提供一种干衣机控制方法，该干衣机为热泵干衣机，压缩机为变频压缩机，现有变频压缩机，在初始阶段上升到第一频率(目标频率)运行后，根据压缩机的负荷升高，降低压缩机的频率。但如果所处的环境温度较低，压缩机在第一频率(目标频率)运行的时 间会增加，如果提前判断压缩机处于低温环境，提高压缩机的目标频率，将有助于干衣机的温度提升，缩短干燥时间。相反，在高温环境，稍微降低目标频率，则有助于节省能耗。
因此，本发明对现有干衣机控制方法进行改进，得出了一种干衣时间或效率受环境温度较小的干衣控制方法：判断干衣机所处的环境温度，根据判断结果，设定压缩机的目标频率，环境温度越高，设定的压缩机的目标频率越低。
在本发明的干衣机控制方法中，变频压缩机包含有升频阶段、频率保持阶段、降频阶段，其中，所述升频阶段，压缩机启动后，压缩机运转频率从低速逐渐上升到设定的目标频率(即最高运转频率)，而不是直接以最高运转频率运转，压缩机的上升分为多个阶段，上升到每个频率阶段后运行0.5～3分钟平稳后再上升到另一频率阶段，此处不直接上升到最高速度是为了：防止压缩机内部的油在频率急转速突然上升后，从换热器回到压缩机的油量小于排出的油量，导致润滑不好，增加压缩机内部件的磨损。防止蒸发器开始时制冷剂未完全蒸发，使液态制冷剂进入压缩机，稀释压缩机内部的润滑油，导致润滑不好。
环境温度越高对应的目标频率越低；所述的降频阶段，压缩机频率按照检测温度由设定的目标频率逐渐下降至烘干结束。通过根据环境温度进行设定目标频率，在低温时，因为提前判断到压缩机处于低温环境，提高压缩机的目标频率，有助于干衣机的温度提升，缩短了干燥时间，而当洗衣机提前检测到环境温度较低时，则稍微降低目标频率，有助于节省能耗。
本发明中，环境温度的判断可直接以环境温度传感器判断或通过压缩机系统的温度传感器间接判断。
实施例一
本实施例提供了通过压缩机系统的温度传感器间接判断环境温度的方法，优选的，所述的温度传感器包括两个，分别设置在压缩机和冷凝器上，并分别采集压缩机排气温度Td和采集冷凝器出口温度Tc判断环境温度T。
则当Max(Td,Tc)≤T1时，则环境温度T＝Min(Td,Tc)；而当Min(Td,Tc)>T1时,尽管温度较高，但较高的温度可能是由于环境温度造成，也可能是由于干衣机刚刚进行过干燥运行造成的温度升高。此时需要根据压缩机排气温度Td和冷凝器出口温度Tc的差值大小确定环境温度,即此时，计算△T＝|Td-Tc|，根据△T的大小确定环境温度T，优选的，26℃≤T1≤32℃。
为了利于对干衣机的压缩机频率进行控制，本发明中将环境温度分为多档，不同档位的环境温度对应不同的目标频率，环境温度越高，对应的目标频率越低，优选的，将环境温度 对应的档位分为低温环境、中温环境、高温环境三档，根据检测的压缩机排气温度Td和冷凝器出口温度Tc判断环境温度对应的档位。具体判断方法如下：
Min(Td,Tc)≤T2，则环境温度对应的档位为低温环境；
当T2＜Min(Td,Tc)≤T1，则环境温度对应的档位为中温环境；
当Min(Td,Tc)＞T1，则计算△T＝|Td-Tc|，判断△T≤△T1时，则环境温度对应的档位为高温环境，否则，△T的值越大，则环境温度越低，优选的，当△T＞△T2时，则环境温度对应的档位为低温环境，当△T1＜△T≤△T2时，则环境温度对应的档位为中温环境；更优选的，26℃≤T1≤32℃，13℃≤T2≤18℃，0≤△T1≤5，12≤△T2≤18。
其中，低温环境对应的压缩机目标频率为K1，中温环境对应的压缩机目标频率为K2，高温环境对应的压缩机目标频率为K3，K1＞K2＞K3，优选的，68Hz≤K1≤72Hz，58Hz≤K2≤65Hz，50Hz≤K3≤56Hz。
通过上述的干衣机控制方法，本发明通过压缩机系统的温度传感器间接判断环境温度，其不受干衣机干燥运行造成温度变化的影响，检测的结果数据可靠，且因为利用了干衣机内部的温度传感器进行外界环境温度的判断，避免了因为要检测外部环境温度，而专门连接设置在干衣机外部的温度传感器，简化了温度检测模块占用的空间，同时也简化了干衣机的结构。
最优选的，本发明中检测的环境温度档位和压缩机的最优目标频率之间对应关系如下表所示：
环境温度 低温环境 中温环境 高温环境
压缩机目标频率 70Hz 60Hz 55Hz
当然的，本发明不限于利用压缩机排气温度Td和冷凝器出口温度Tc判断环境温度档，本发明中也可通过直接以环境温度传感器判断环境温度档，比如在干衣机上外置有温度传感器直接以环境温度传感器判断环境温度，当采用此方案进行环境温度的测量时，要注意的是，外置的温度传感器需要远离干衣机高温或低温区，而是设置在外界环境温度相同的位置，使得外置的温度传感器能够检测到外界环境温度而非干衣机内部温度。
实施例二
本发明中，变频压缩机包含有升频阶段、频率保持阶段、降频阶段三个阶段。变频压缩机启动后，压缩机运转频率从低速逐渐上升到设定的目标频率，其中，环境温度越高对应的目标频率越低；所述的降频阶段，压缩机频率按照检测温度由设定的目标频率逐渐下降至烘干结束。
其中，压缩机上升到设定的目标频率之后监测变频压缩机运行电流值以及反映冷凝温度的冷凝器表面温度和/或反映压缩机内部温度的压缩机排气温度值，如果上述电流值和上述温度同时在限值范围内，则变频压缩机的频率进行保持，如果上述温度和电流值之一达到限值则频率进行保持，压缩机频率即使没有上升到目标频率，也不再上升，优选的，当温度值或电流值之一超标或都超标，则稍微降低压缩机频率，比如降低频率2Hz，从而保证了干衣机安全的运行。优选的，本实施例中通过监测变频压缩机运行电流值和变频压缩机排气温度值进行调节和维持压缩机频率。
当压缩机达到设定的目标频率或达到限值要求的最高频率后，进入频率保持阶段，并安装设定的目标频率或达到的限值要求的最高频率进行运转。
当检测温度高于设定值时，压缩机进入降频阶段，压缩机的频率调节，按照进筒温度，出筒温度，压缩机，蒸发器，冷凝器上设置的一个或者多个温度传感器检测的温度或者按照时间进行调节。
其中，检测温度是指检测的干衣机进筒温度、或出筒温度，或压缩机排气温度，或蒸发器温度，或冷凝器出口温度，或冷凝器表面温度，或前述几者的任意组合。优选的，检测温度为检测的冷凝器表面温度。
本发明中降频阶段采用分段控制：将变频压缩机下降频率分成多个阶段，检测温度也对应分为多档，变频压缩机下降频率的各阶段分别与检测温度各档建立对应关系，检测温度挡的温度越高，对应的下降频率段的频率越低。
具体的，降频阶段，检测温度上升到T11℃时，变频压缩机频率从目标频率fnHz下降到f1Hz，检测温度上升到T12℃时，变频压缩机频率从f1Hz下降到f2Hz,如此循环直至检测温度上升至T1m℃时，变频压缩机频率从f(m-1)Hz下降到fmHz，直至干衣结束。
参见图1所示的本发明的干衣机控制方法流程图，步骤如下：
S1，变频压缩机启动；
S2,判定环境温度，确定压缩机的目标频率fnHz；
S3，变频压缩机启动，频率上升到目标频率fnHz；
S4，监测压缩机排气温度及变频压缩机电流是否超标，是，则变频压缩机频率降低2Hz，并继续步骤S4，否则进入步骤S5；
S5，判断检测温度是否达到T11℃，是，则进入步骤S6，否则返回步骤S4；
S6，变频压缩机频率从目标频率fnHz下降到f1Hz；
S7，检测温度上升到T12℃时，变频压缩机频率从f1Hz下降到f2Hz；
S8,如此循环直至检测温度上升至T1m℃时，变频压缩机频率从f(m-1)Hz下降到fmHz；
S9，变频压缩机频率为fmHz,直至干衣结束。
在上述步骤中当m值为3时，当检测温度为检测冷凝器表面温度时，则举例如下：
当冷凝器出口温度上升到32℃(T11℃)时，变频压缩机频率从目标转速60Hz(fnHz)下降到50Hz(f1Hz)；当冷凝器出口温度上升到42℃(T12℃)时，变频压缩机频率从转速50Hz(f1Hz)下降到40Hz(f2Hz)；当冷凝器出口温度上升到47℃(T13℃)时，变频压缩机频率从40Hz(f2Hz)下降到30Hz(f3Hz)；变频压缩机以30Hz(f3Hz)运行到烘干结束。
本发明提供的干衣机控制方法，根据外界温度调整压缩机的目标频率，当外界环境温度较低时，变频压缩机的目标频率升高，从而降低了低温环境下干衣机干衣效率和干衣机干衣时间，而当外界环境温度较高时，变频压缩机的目标频率降低，则在干衣过程中有节省能耗的作用。
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 (10)

  1. 一种干衣机控制方法，该干衣机为热泵干衣机，压缩机为变频压缩机，其特征在于：判断干衣机所处的环境温度，根据判断结果，设定压缩机的目标频率，环境温度越高，设定的压缩机的目标频率越低。
  2. 根据权利要求1所述的一种干衣机控制方法，其特征在于：变频压缩机包含有升频阶段、频率保持阶段、降频阶段；
    所述升频阶段，压缩机启动后，压缩机运转频率从低速逐渐上升到设定的目标频率，其中，环境温度越高对应的目标频率越低；
    所述的降频阶段，压缩机频率按照检测温度由设定的目标频率逐渐下降。
  3. 根据权利要求1或2所述的一种干衣机控制方法，其特征在于：根据检测的压缩机排气温度Td和冷凝器出口温度Tc判断环境温度T；
    Max(Td,Tc)≤T1时，则环境温度T＝Min(Td,Tc)；
    Min(Td,Tc)＞T1时，则计算△T＝|Td-Tc|，根据△T的大小确定环境温度T，优选的，26℃≤T1≤32℃。
  4. 根据权利要求1-3任一所述的一种干衣机控制方法，其特征在于：将环境温度分为多档，不同档位的环境温度对应不同的目标频率，对应环境温度越高的档位，设定的压缩机目标频率越低。
  5. 根据权利要求4所述的一种干衣机控制方法，其特征在于：根据检测的压缩机排气温度Td和冷凝器出口温度Tc判断环境温度对应的档位，将环境温度对应的档位分为低温环境、中温环境、高温环境三档；
    Min(Td,Tc)≤T2，则环境温度对应的档位为低温环境；
    当T2＜Min(Td,Tc)≤T1，则环境温度对应的档位为中温环境；
    当Min(Td,Tc)＞T1，则计算△T＝|Td-Tc|，判断△T≤△T1时，则环境温度对应的档位为高温环境，否则，△T的值越大，则环境温度越低，优选的，当△T＞△T2时，则环境温度对应的档位为低温环境，当△T1＜△T≤△T2时，则环境温度对应的档位为中温环境；
    更优选的，26℃≤T1≤32℃，13℃≤T2≤18℃，0≤△T1≤5，12≤△T2≤18。
  6. 根据权利要求5所述的一种干衣机控制方法，其特征在于：低温环境对应的压缩机目标频率为K1，中温环境对应的压缩机目标频率为K2，高温环境对应的压缩机目标频率为K3，K1＞K2＞K3，优选的，68Hz≤K1≤72Hz，58Hz≤K2≤65Hz，50Hz≤K3≤56Hz。
  7. 根据权利要求2所述的一种干衣机控制方法，其特征在于：降频阶段采用分段控制：将变频压缩机下降频率分成多个阶段，检测温度也对应分为多档，变频压缩机下降频率的各 阶段分别与检测温度各档建立对应关系，检测温度挡的温度越高，对应的下降频率段的频率越低。
  8. 根据权利要求7所述的一种干衣机控制方法，其特征在于：降频阶段，检测温度上升到T11时，变频压缩机频率从目标频率f下降到f1，检测温度上升到T12时，变频压缩机频率从f1下降到f2,如此循环直至检测温度上升至T1m时，变频压缩机频率从f(m-1)下降到fm，直至干衣结束。
  9. 根据权利要求2或7所述的一种干衣机控制方法，其特征在于：所述的检测温度是指检测的干衣机进筒温度，或出筒温度，或压缩机排气温度，或蒸发器温度，或冷凝器出口温度，或冷凝器表面温度,优选的,检测温度为检测的冷凝器表面温度。
  10. 根据权利要求1所述的一种干衣机控制方法，其特征在于：通过环境温度传感器直接检测环境温度或通过压缩机系统的温度传感器间接判断。
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