WO2022095499A1 - 化霜控制方法及具有其的制冷家电 - Google Patents

化霜控制方法及具有其的制冷家电 Download PDF

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Publication number
WO2022095499A1
WO2022095499A1 PCT/CN2021/106013 CN2021106013W WO2022095499A1 WO 2022095499 A1 WO2022095499 A1 WO 2022095499A1 CN 2021106013 W CN2021106013 W CN 2021106013W WO 2022095499 A1 WO2022095499 A1 WO 2022095499A1
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Prior art keywords
defrosting
fault
control method
fan
time
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PCT/CN2021/106013
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English (en)
French (fr)
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边昭斌
周文
邹磊
丁宝森
魏星
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青岛海尔电冰箱有限公司
海尔智家股份有限公司
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Publication of WO2022095499A1 publication Critical patent/WO2022095499A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • 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 invention relates to refrigerating household appliances, in particular to a defrosting control method and a refrigerating household appliance having the same.
  • Refrigerator, freezer and other refrigeration appliances have become a must in life.
  • the defrosting of existing refrigerators is basically based on periodic defrosting, and the defrosting cycle is determined by detecting the operating time of the refrigerator and the accumulated time of door opening.
  • this method cannot judge the working status of the fan. If the frost is not completely defrosted for a long time, there will be more and more frost on the evaporator and the fan, and finally the fan will freeze to death and the refrigerator will not cool.
  • the heating time of the defrosting heating wire is fixed.
  • frost if the defrosting cannot be exited in time according to the fixed heating time, it will easily lead to waste of energy consumption, and the cooling compartment in the later stage of defrosting will be wasteful. The temperature may rise too high.
  • the present invention aims to solve at least one of the technical problems existing in the prior art, so as to provide a defrosting control method and a refrigerating household appliance having the same.
  • a defrosting control method comprising the steps:
  • the heating module is turned off, it is judged whether the fan is in a fault state, and if so, the fault defrost is continued; if not, the defrost is carried out according to the normal defrost mode.
  • “continue to perform fault defrosting” includes: the temperature detected by the defrost sensor reaches 10°C, and the heating module is turned on; the temperature detected by the defrost sensor reaches 20°C, and the heating module is turned off; and every time the heating module is turned off, the heating module is turned off. Determine whether the fan is in a fault state.
  • the defrosting is ended; if not, the defrosting is continued.
  • the first predetermined time is 180min.
  • the second predetermined time is 180min.
  • the compressor will start to defrost after the accumulated running time has reached the second preset time; if not, continue to count the opening time.
  • the preset time is 70 seconds to 120 seconds, and the second preset time is 8 hours to 10 hours;
  • defrosting starts after a third preset time, and the third preset time is 72 hours to 96 hours.
  • a refrigeration household appliance includes the above defrosting control method.
  • the beneficial effects of the present invention are: the defrosting control method of the present invention, after the fan is in a fault state, enters the fault defrosting, starts the heating module, and closes the heating module when the temperature detected by the defrosting sensor reaches 20°C.
  • the fan fails, defrost the fault in time to avoid affecting the cooling effect; at the same time, when the temperature detected by the defrost sensor reaches 20 °C, the heating module is turned off to prevent the temperature of the cooling compartment from being too high.
  • Fig. 1 is the flow chart of the defrosting control method in a preferred embodiment of the present invention
  • Fig. 2 is the flow chart of the fault defrosting step in a preferred embodiment of the present invention
  • Fig. 3 is the flow chart of the defrosting control method in another preferred embodiment of the present invention.
  • FIG. 4 is a flowchart of a defrosting control method in a specific embodiment of the present invention.
  • FIG. 5 is a flowchart of a defrosting control method in a specific embodiment of the present invention.
  • the defrosting control method of the present invention is used to refrigerate home appliances
  • the refrigerated home appliances include a refrigerating compartment, a refrigerating system that provides cooling capacity for the refrigerating compartment, and a The evaporator and the circulating air duct of the refrigeration compartment, the fan located in the circulating air duct, the heating module for defrosting the evaporator, and the main control unit, the main control unit is connected with other electrical components in communication, To control each part to achieve refrigeration and defrosting.
  • the heating module provides heat to the evaporator, including heating wires or heating pipes located below the evaporator.
  • the blower includes a PWM input end for controlling the input duty ratio of the blower to realize the speed control of the blower; at the same time, the blower also includes a feedback output end for providing the actual rotational speed of the blower to the main control unit.
  • the defrosting control method of the present invention comprises the following steps:
  • the defrosting control method performs fault defrosting in time when the fan fails, so as not to affect the cooling effect; at the same time, it is considered that when entering the fault defrosting, the refrigerating appliance does not necessarily need to enter the defrosting according to the normal procedure, so When the temperature detected by the defrost sensor reaches 20°C, the heating module is turned off to avoid causing the temperature of the refrigeration compartment to be too high.
  • Determining whether the fan is in a fault state includes but is not limited to the following: after sending a rotation signal to the fan, and no information about the rotation of the fan is obtained, it is determined that the fan is in a fault state. Or, input the given power P0 through the PWM control input terminal, and there is a certain speed difference between the actual speed n of the fan fed back by the fan and the set speed N of the fan under the given power P0, and the size of the speed difference varies with the amount of frost. increase and increase.
  • the rotational speed difference When the rotational speed difference is greater than a certain threshold difference, it indicates that the amount of frost on the fan has affected the normal operation of the fan, and it is determined that the fan is in a fault state. For example, if the actual speed n of the fan is below 70%, or even below 50% of the predetermined speed N of the fan, the fan is in a fault state.
  • the heating module After the heating module is turned off for the first time, it is judged whether the fan is still in a fault state, and if so, the fault defrosting is continued;
  • Continuous to perform fault defrosting includes: the temperature detected by the defrost sensor reaches 10°C, and the heating module is turned on; the temperature detected by the defrost sensor reaches 20°C, and the heating module is turned off; The heating module judges whether the fan is in a fault state. Repeat the above steps to prevent the temperature of the refrigeration compartment from being too high.
  • the first predetermined time is 180 minutes, so as to ensure that a faulty defrost can relieve the fault state of the fan, and at the same time, the temperature of the refrigeration compartment is not too high.
  • the fan is defrosted after the first failure, which is relieved, the rotation speed is increased, and the failure of the fan can even be eliminated.
  • the fan is restarted and it is judged whether the fan is in a fault state. If so, start the refrigeration system to avoid the temperature of the refrigeration compartment from being too high. Enter the fault defrosting again, and remove the fan failure problem as soon as possible; if not, start the refrigeration system and enter the normal refrigeration state.
  • the second predetermined time is 180 minutes, which can prevent the temperature of the refrigerating compartment from being too high, and can relieve the fan failure as soon as possible.
  • the invention judges whether the fan is faulty after the end of the fault defrosting.
  • the refrigeration system is started to run for a second predetermined time, and then the fault defrost is entered again.
  • this process is equivalent to splitting the faulty defrosting into two executions, which reduces the duration of each faulty defrosting, and the refrigeration system is activated between the two faulty defrosting, which can effectively avoid the excessive defrosting time due to faults.
  • the temperature of the cooling compartment is too high due to the long time.
  • the operation of the refrigeration system keeps the temperature in the refrigeration room at a low temperature for a long time.
  • the defrosting control method of the present invention also includes a periodic defrosting step:
  • the compressor will start to defrost after the accumulated running time has reached the second preset time; if not, continue to count the opening time.
  • the preset time is 70 seconds to 120 seconds, and the second preset time is 8 hours to 10 hours;
  • defrosting starts after a third preset time, and the third preset time is 72 hours to 96 hours.
  • the above method makes the defrosting control process more accurate and reliable through the combination of fault defrosting and periodic defrosting.
  • a refrigeration household appliance includes the above defrosting control method.
  • the defrosting control method of the present invention after the fan is in a fault state, it enters the fault defrost, starts the heating module, and closes the heating module when the temperature detected by the defrost sensor reaches 20°C.
  • the fan fails, defrost the fault in time to avoid affecting the cooling effect; at the same time, when the temperature detected by the defrost sensor reaches 20 °C, the heating module is turned off to prevent the temperature of the cooling compartment from being too high.
  • the method can realize the self-repair after the refrigerating household appliance is not refrigerated due to frosting, and the refrigerating function reappears.

Abstract

一种化霜控制方法，包括如下步骤：获取风机工作状态；若风机处于故障状态，则进入故障化霜，启动加热模块，至化霜传感器检测到的温度到达20℃，关闭加热模块，避免制冷间室温度过高。

Description

化霜控制方法及具有其的制冷家电 技术领域
本发明涉及制冷家电，尤其涉及一种化霜控制方法及具有其的制冷家电。
背景技术
冰箱、冷柜等制冷家电已成为生活的必须用品。
但是地域的环境、用户的习惯等因素对冰箱使用过程中的结霜量有很大的影响。例如，印度用户在使用冰箱时，因当地经济、环境等因素的影响，印度用户经常将大量的水放入冰箱中，以得到冷水或冰块饮用，以此给冰箱带来的热负荷是巨大的，结霜量也会增多，也需要强化冰箱制冷，以免降温速度慢导致用户投诉。并且，结霜较多时，风机也会被冻结，出现故障。
而现有冰箱化霜基本以周期式化霜为主，通过检测冰箱运行时间、开门累计时间等确定化霜周期。但是此种方法无法判断风机工作状态，若长时间不化霜完全就会导致蒸发器、风机上会有越来越多的霜，最后导致风机结冰冻死，冰箱不制冷。
并且开始化霜后，化霜加热丝加热的时间固定，在结霜量较少的情况下，如果按照固定的加热时间，不能及时退出化霜容易造成能耗浪费，且化霜后期制冷间室的温度可能上升过高。
有鉴于此，有必要提供一种新的化霜控制方法及具有其的制冷家电，以解决上述问题。
发明内容
本发明旨在至少解决现有技术存在的技术问题之一，从而提供一种化霜控制方法及具有其的制冷家电。
为实现上述发明目的之一，本发明采用如下技术方案：
一种化霜控制方法，包括如下步骤：
获取风机工作状态；
若风机处于故障状态，则进入故障化霜，启动加热模块，至化霜传感器检测到的温度到达20℃，关闭加热模块。
进一步地，关闭加热模块后，判断风机是否处于故障状态，若是，则继续进行故障化霜；若否，则按照普通化霜模式进行化霜。
进一步地，“继续进行故障化霜”包括：化霜传感器检测到的温度到达10℃，开启加热模块；化霜传感器检测到的温度到达20℃，关闭加热模块；并在每次关闭加热模块时判断风机是否处于故障状态。
进一步地，进入故障化霜后，判断化霜总时间是否达到第一预定时间，若是，则结束化霜；若否，则继续化霜。
进一步地，所述第一预定时间为180min。
进一步地，结束化霜后，判断风机是否处于故障状态，若是，启动制冷系统，运行第二预定时间后，再次进入故障化霜；若否，启动制冷系统。
进一步地，第二预定时间为180min。
进一步地，再次进入故障化霜后，直到风机处于正常状态，退出故障化霜。
进一步地，还包括周期性化霜步骤：
获取门体的开关门信息；
若门体被打开过，判断开门累计时间是否达到第一预设时间，若是，压缩机累计运行时间达到第二预设时间后开始化霜；若否，则继续统计开门时间；所述第一预设时间为70秒～120秒，所述第二预设时间为8小时～10小时；
若门体未被打开过，则第三预设时间后开始化霜，所述第三预设时间为72小时～96小时。
为实现上述发明目的之一，本发明还采用如下技术方案：
一种制冷家电，包括上述化霜控制方法。
本发明的有益效果是：本发明的化霜控制方法，在风机处于故障状态后，进入故障化霜，启动加热模块，至化霜传感器检测到的温度到达20℃，关闭加热模块。在风机出现故障时及时进行故障化霜，以免影响制冷效果；同时在化霜传感器检测到的温度到达20℃，关闭加热模块，避免制冷间室温度过高。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明一较佳实施例中的化霜控制方法的流程图；
图2为本发明一较佳实施例中的故障化霜步骤的流程图；
图3为本发明另一较佳实施例中的化霜控制方法的流程图；
图4为本发明一具体实施例中的化霜控制方法的流程图；
图5为本发明一具体实施例中的化霜控制方法的流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术 人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1～图4所示，本发明的化霜控制方法用以制冷家电，所述制冷家电包括制冷间室、给所述制冷间室提供冷量的制冷系统、连通所述制冷系统的蒸发器与所述制冷间室的循环风道、位于所述循环风道内的风机、给所述蒸发器进行化霜的加热模块、主控单元，所述主控单元与其他电气元件通讯连接，以控制各个部分实现制冷和化霜。
其中，所述加热模块给蒸发器提供热量，包括位于所述蒸发器下方的加热丝或加热管等。
所述风机包括PWM输入端，用于控制所述风机的输入占空比，实现所述风机转速控制；同时，所述风机还包括反馈输出端，向所述主控单元提供风机实际转速。
如果风机因为结霜而无法正常工作，会影响制冷间室的制冷效果。本发明的所述化霜控制方法包括如下步骤：
获取风机工作状态；
若所述风机处于故障状态，则进入故障化霜，启动加热模块，至化霜传感器检测到的温度到达20℃，关闭所述加热模块。
该化霜控制方法在所述风机出现故障时及时进行故障化霜，以免影响制冷效果；同时考虑到进入所述故障化霜时，所述制冷家电按照正常程序并不一定需要进入化霜，因此在化霜传感器检测到的温度到达20℃时，关闭所述加热模块，避免造成所述制冷间室温度过高。
判断所述风机是否处于故障状态包括但不限于以下几种：给所述风机发出转动信号后，未获取到所述风机转动的信息，则判定所述风机处于故障状态。或，通过PWM控制输入端输入既定功率P0，而所述风机反馈的风机实际转速n与既定功率P0下的风机既定转速N存在一定的转速差值，且该转速差值的大小随结霜量的增多而增大。
当转速差值大于一定的阈值差时，说明风机的结霜量已经影响了所述风机的正常工作，判断风机处于故障状态。例如风机实际转速n为风机既定转速N的70％以下，甚至50％以下，则所述风机处于故障状态。
在第一次关闭加热模块后，判断所述风机是否仍然处于故障状态，若是，则继续进行故障化霜；若否，则按照普通化霜模式进行化霜，化霜结束后再进入制冷状态。
“继续进行故障化霜”包括：化霜传感器检测到的温度到达10℃，开启所述加热模块；所述化霜传感器检测到的温度到达20℃，关闭所述加热模块；并在每次关闭所述加热模块时判断所述风机是否处于故障状态。循环上述步骤，避免制冷间室温度过高。
进入故障化霜后，判断化霜总时间是否达到第一预定时间，若是，则结束化霜，避免所述制冷间室温度升高；若否，则继续化霜，至所述风机处于正常状态。
优选地，所述第一预定时间为180min，尽量保证一次故障化霜即能解除所述风机的故障状态，同时兼顾所述制冷间室的温度不会过高。
所述风机经过第一次故障化霜，有所缓解，转速有所提高，甚至可以解除了所述风机故障。为了确保所述风机故障解除，结束化霜后，再启动所述风机并判断所述风机是否处于故障状态，若是，启动制冷系统，避免制冷间室温度过高，但是运行第二预定时间后，再次进入故障化霜，尽早解除风机故障问题；若否，启动制冷系统，进入正常制冷状态。
优选地，第二预定时间为180min，可以避免制冷间室温度过高，又能尽快解除风机故障。
本发明通过故障化霜结束后再判断风机是否故障，在风机仍然处于故障状态时先启动制冷系统运行第二预定时间，然后再次进入故障化霜。一方面，该过程相当于将故障化霜拆分为两次执行，减少了每次故障化霜的时长，且两次故障化霜之间启动了制冷系统，可以有效避免因为故 障化霜时间过长而引起的制冷间室的温度过高。另一方面，制冷系统的运行，使得制冷间室内的温度能够保持较长时间的低温，可以在第二次启动故障化霜时直到所述风机处于正常状态，再退出故障化霜，以尽快解除风机故障。
进一步地，请参阅图5所示，本发明的化霜控制方法还包括周期性化霜步骤：
获取门体的开关门信息；
若门体被打开过，判断开门累计时间是否达到第一预设时间，若是，压缩机累计运行时间达到第二预设时间后开始化霜；若否，则继续统计开门时间；所述第一预设时间为70秒～120秒，所述第二预设时间为8小时～10小时；
若门体未被打开过，则第三预设时间后开始化霜，所述第三预设时间为72小时～96小时。
上述方法通过故障化霜与周期性化霜相结合的方式，使得化霜控制过程更为精确可靠。
一种制冷家电，包括上述化霜控制方法。
综上所述，本发明的化霜控制方法，在风机处于故障状态后，进入故障化霜，启动加热模块，至化霜传感器检测到的温度到达20℃，关闭加热模块。在风机出现故障时及时进行故障化霜，以免影响制冷效果；同时在化霜传感器检测到的温度到达20℃，关闭加热模块，避免制冷间室温度过高。该方法能够实现在制冷家电因为结霜导致不制冷后的自我修复，重新出现制冷功能。
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施方式中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方 式。
上文所列出的一系列的详细说明仅仅是针对本发明的可行性实施方式的具体说明，它们并非用以限制本发明的保护范围，凡未脱离本发明技艺精神所作的等效实施方式或变更均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种化霜控制方法，其特征在于，包括如下步骤：
    获取风机工作状态；
    若风机处于故障状态，则进入故障化霜，启动加热模块，至化霜传感器检测到的温度到达20℃，关闭加热模块。
  2. 根据权利要求1所述的化霜控制方法，其特征在于，关闭加热模块后，判断风机是否处于故障状态，若是，则继续进行故障化霜；若否，则按照普通化霜模式进行化霜。
  3. 根据权利要求2所述的化霜控制方法，其特征在于，“继续进行故障化霜”包括：化霜传感器检测到的温度到达10℃，开启加热模块；化霜传感器检测到的温度到达20℃，关闭加热模块；并在每次关闭加热模块时判断风机是否处于故障状态。
  4. 根据权利要求1所述的化霜控制方法，其特征在于，进入故障化霜后，判断化霜总时间是否达到第一预定时间，若是，则结束化霜；若否，则继续化霜。
  5. 根据权利要求4所述的化霜控制方法，其特征在于，所述第一预定时间为180min。
  6. 根据权利要求4所述的化霜控制方法，其特征在于，结束化霜后，判断风机是否处于故障状态，若是，启动制冷系统，运行第二预定时间后，再次进入故障化霜；若否，启动制冷系统。
  7. 根据权利要求6所述的化霜控制方法，其特征在于，第二预定时间为180min。
  8. 根据权利要求6所述的化霜控制方法，其特征在于，再次进入故障化霜后，直到风机处于正常状态，退出故障化霜。
  9. 根据权利要求1所述的化霜控制方法，其特征在于，还包括周期 性化霜步骤：
    获取门体的开关门信息；
    若门体被打开过，判断开门累计时间是否达到第一预设时间，若是，压缩机累计运行时间达到第二预设时间后开始化霜；若否，则继续统计开门时间；所述第一预设时间为70秒～120秒，所述第二预设时间为8小时～10小时；
    若门体未被打开过，则第三预设时间后开始化霜，所述第三预设时间为72小时～96小时。
  10. 一种制冷家电，其特征在于，包括权利要求1所述的化霜控制方法。
PCT/CN2021/106013 2020-11-06 2021-07-13 化霜控制方法及具有其的制冷家电 WO2022095499A1 (zh)

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