CN108895752B - Method and device for preventing fan from being frozen during defrosting - Google Patents

Method and device for preventing fan from being frozen during defrosting Download PDF

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Publication number
CN108895752B
CN108895752B CN201810502309.9A CN201810502309A CN108895752B CN 108895752 B CN108895752 B CN 108895752B CN 201810502309 A CN201810502309 A CN 201810502309A CN 108895752 B CN108895752 B CN 108895752B
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China
Prior art keywords
fan
voltage
defrosting
evaporator
voltage values
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CN201810502309.9A
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Chinese (zh)
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CN108895752A (en
Inventor
赵弇锋
赵斌堂
朱小兵
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Qingdao Haier Special Refrigerator Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Special Refrigerator Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202110289359.5A priority Critical patent/CN113063248B/en
Priority to CN201810502309.9A priority patent/CN108895752B/en
Publication of CN108895752A publication Critical patent/CN108895752A/en
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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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • 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
    • F25D29/003—Arrangement or mounting of control or safety devices for movable 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
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Defrosting Systems (AREA)

Abstract

The invention provides a method and a device for preventing a fan from being frozen during defrosting of an air-cooled refrigerator. The invention also provides a refrigerator, and the refrigerator realizes the method for preventing the fan from being frozen.

Description

Method and device for preventing fan from being frozen during defrosting
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a method and a device for preventing a fan from being frozen in a defrosting period.
Background
The air-cooled refrigerator has the advantages of good fresh-keeping effect, quick refrigeration, environmental protection and the like, and is more and more favored by consumers; when the air-cooled refrigerator is used for refrigerating, the evaporator in the air duct can refrigerate, the fan in the air duct can rotate, and cold air around the evaporator is blown into the storage compartment (such as a refrigerating chamber or a freezing chamber) along the air duct, so that the storage compartment is refrigerated. It is understood that, during the cooling process, frost may be condensed on the surface of the evaporator, and therefore, the evaporator needs to be defrosted periodically, and during the defrosting process, the fan stops rotating, and therefore, during the defrosting process, the fan may be frozen, thereby affecting the normal use of the air-cooled refrigerator.
Therefore, it is an urgent problem to design a method and apparatus for preventing a fan from being frozen during defrosting of an air-cooled refrigerator.
Disclosure of Invention
An object of the present invention is to provide a method and apparatus for preventing a fan from being frozen during defrosting for an air-cooled refrigerator.
In order to achieve one of the above objects, according to one embodiment of the present invention, there is provided a method for preventing a fan from being frozen during defrosting of an air-cooled refrigerator including an evaporator, a storage compartment for storing stored goods, a fan disposed in an air path from the evaporator to the storage compartment, and a defrosting module for melting frost attached to the evaporator, the method including: receiving a defrosting instruction, controlling the evaporator to stop refrigerating, the fan to stop rotating, and controlling the defrosting module to start defrosting, and setting a first timer, wherein the first timer is overtime after a first preset time; and starting the fan to rotate when the first timer is determined to be overtime.
As a further improvement of an embodiment of the present invention, the method further comprises the following steps: continuously executing the operation of the control fan until a defrosting stopping instruction is received; the controlling the operation of the fan includes: the method comprises the steps of obtaining the working state of a fan, stopping the fan from rotating when the working state is determined to meet a preset condition, and setting a first timer; and starting the fan to rotate when the first timer is determined to be overtime.
As a further improvement of an embodiment of the present invention, the starting of the rotation of the fan includes: and acquiring the lowest starting voltage of the fan, and applying the lowest starting voltage to the fan.
As a further improvement of an embodiment of the present invention, the starting of the rotation of the fan includes: acquiring a plurality of voltage values between the lowest starting voltage and the rated voltage of the fan, wherein the voltage values comprise the lowest starting voltage and the rated voltage; and continuously selecting the voltage value which is not used and has the lowest value from the plurality of voltage values, and applying the voltage value to the fan for a second preset time until the plurality of voltage values are used.
As a further improvement of an embodiment of the present invention, the acquiring a working state of the fan and determining that the working state meets a preset condition includes: upon determining that the plurality of voltage values have all been used, a preset condition is met.
As a further improvement of an embodiment of the present invention, the acquiring a plurality of voltage values between a lowest starting voltage and a rated voltage of the wind turbine includes: the method comprises the steps of obtaining a plurality of voltage values between the lowest starting voltage and the rated voltage of the fan, and when the voltage values are sorted according to the size, the voltage values are in an arithmetic progression, and the tolerance is greater than or equal to 0.2V and less than or equal to 2V.
As a further improvement of an embodiment of the present invention, the second preset time is 0.2s or more and 1.5s or less.
As a further improvement of an embodiment of the present invention, the first preset time is 2min or more and 10min or less.
An embodiment of the present invention further provides an apparatus for preventing a fan from being frozen during defrosting for an air-cooled refrigerator, the air-cooled refrigerator including an evaporator, a storage compartment for storing stored items, a fan disposed in an air path from the evaporator to the storage compartment, and a defrosting module for melting frost attached to the evaporator, the method including the following modules: the pre-processing module is used for receiving a defrosting instruction, controlling the evaporator to stop refrigerating, controlling the fan to stop rotating and controlling the defrosting module to start defrosting, and setting a first timer which is overtime after a first preset time; and the fan control module is used for starting the fan to rotate when the first timer is determined to be overtime.
The embodiment of the invention also provides a refrigerator which is provided with the device for preventing the fan from being frozen.
Compared with the prior art, the invention has the technical effects that:
(1) according to the method for preventing the fan from being frozen in the embodiment of the invention, the fan is started every first preset time during defrosting of the air-cooled refrigerator, and the rotation of the fan is controlled, so that the fan can be effectively prevented from being frozen during defrosting;
(2) according to the method for preventing the fan from being frozen, when the fan is started to rotate, the lowest starting voltage is applied firstly, so that the fan can be effectively prevented from being burnt when the fan does not rotate.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for preventing a fan from being frozen according to a first embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for preventing a fan from being frozen according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
The embodiment of the invention provides a method for preventing a fan from being frozen during defrosting of an air-cooled refrigerator, which is used for the air-cooled refrigerator and comprises an evaporator, a storage compartment for storing stored articles, the fan arranged in an air path from the evaporator to the storage compartment, and a defrosting module for melting frost attached to the evaporator, wherein the storage compartment is used for storing the stored articles; here, when the air-cooled refrigerator performs cooling, the evaporator cools and cools air around the evaporator, the rotating fan blows cool air around the evaporator into the storage compartment (e.g., a refrigerating compartment or a freezing compartment) and performs cooling, and warm air in the storage compartment is drawn back to the periphery of the evaporator under the action of the fan, so that a cycle is formed, and thus, the cooling operation of the refrigerator is completed. Here, the defrosting module may be an electric heating device, which may be installed around the evaporator (e.g., below the evaporator, etc.), and when the defrosting module is heated, the frost on the evaporator may be melted; the defrosting module can also be an evaporator, for example, when warm media is injected into the evaporator, frost attached to the evaporator can be melted. Here, the method for preventing the fan from being frozen may be performed by a control module in the refrigerator, which may be a hardware module, a software module, a combination of software and hardware, or the like, as shown in fig. 1, and the method includes the following steps:
step 101: receiving a defrosting instruction, controlling the evaporator to stop refrigerating, the fan to stop rotating, and controlling the defrosting module to start defrosting, and setting a first timer, wherein the first timer is overtime after a first preset time; here, during the use of the air-cooled refrigerator, the evaporator is gradually attached with frost, and when the refrigerator detects that defrosting is needed (for example, the defrosting process is started at intervals, or when the frost on the evaporator is accumulated to a certain amount, the defrosting process is started, and the like), the refrigerator sends a defrosting instruction to the control module, and the control module can receive the defrosting instruction; after receiving the defrosting instruction, the control module controls the air-cooled refrigerator to start defrosting, and generally comprises the following processes: the evaporator is controlled to stop refrigerating, the fan stops rotating, and the defrosting module is controlled to start defrosting. In the defrosting process, although the defrosting module can generate heat energy, the heat energy can be absorbed by the frost on the evaporator, so that the temperature of the fan is possibly still below the freezing temperature, the rotor of the motor in the fan can be frozen and cannot rotate again, which is harmful to the normal use of the refrigerator and needs to be avoided to the utmost extent.
Step 102: and starting the fan to rotate when the first timer is determined to be overtime. Here, it can be understood that, in the cooling process of the air-cooled refrigerator, the fan is rotated, that is, the rotor is not frozen and can be rotated, and after the rotor stops rotating, the rotor is frozen after a certain time, and the frozen thickness is so thick that the rotor can not rotate any more. Therefore, the first preset time needs to be less than this time. According to long-term practice of the inventor, the freezing of the fan can be greatly prevented when the first preset time is 2-10 min. When the fan rotation is stopped may be determined according to actual conditions, for example, when the rotor rotates, heat may be generated by friction with the stator, and when the ice on the rotor is melted, the fan rotation may be stopped, that is, the second preset time is a time period from the motor to the time when the ice on the rotor is melted.
Here, when the first timer is overtime, if the fan cannot rotate and continues to be electrified, the motor may be burnt; at the moment, the defrosting time can be prolonged, and the frost on the fan can be melted by the heat generated by the defrosting module.
Preferably, the method further comprises the following steps: continuously executing the operation of the control fan until a defrosting stopping instruction is received; the controlling the operation of the fan includes: the method comprises the steps of obtaining the working state of a fan, stopping the fan from rotating when the working state is determined to meet a preset condition, and setting a first timer; and starting the fan to rotate when the first timer is determined to be overtime.
Here, the determining that the operating state satisfies the preset condition may be: after the fan continuously rotates for a certain time, the preset condition is met; or when the frost on the surface of the fan rotor is melted, the preset conditions are met, and the like. During this defrosting, the fan may be activated every first preset time.
Here, when the refrigerator detects that defrosting can be stopped, the refrigerator sends a defrosting stop instruction to the control module, and the control module receives the defrosting stop instruction.
In summary, in the method for preventing the fan from being frozen in the embodiment of the invention, the fan is periodically controlled to rotate during defrosting, so that the fan can be effectively prevented from being frozen, and the fan cannot be kept in a rotating state all the time, thereby effectively saving energy.
Preferably, the starting the rotation of the fan includes: and acquiring the lowest starting voltage of the fan, and applying the lowest starting voltage to the fan. Here, it can be understood that the motor has the lowest starting voltage, and the motor cannot be started when the voltage is lower than the lowest starting voltage; and the motor has rated voltage, namely the voltage required when the motor works normally.
In practice, the rotor of the motor in the fan is likely to be frozen, so that the rotor cannot rotate, and at this time, if voltage is applied to the motor, the rotor cannot rotate, so that the motor becomes a heating element with small resistance and is easy to burn. Here, the lowest starting voltage is applied to the motor, when the rotor cannot rotate, the heat generated by the motor is small, so that the motor is not easy to burn, and the generated heat can be used for melting frost on the mover. It will be appreciated that the mover may be rotated after the frost on the mover is melted.
Preferably, the starting the rotation of the fan includes: acquiring a plurality of voltage values between the lowest starting voltage and the rated voltage of the fan, wherein the voltage values comprise the lowest starting voltage and the rated voltage; and continuously selecting the voltage value which is not used and has the lowest value from the plurality of voltage values, and applying the voltage value to the fan for a second preset time until the plurality of voltage values are used.
Here, the lowest starting voltage is first applied to the motor, after which the voltage value is gradually increased until the nominal voltage value is finally applied. Here, first, the lowest starting voltage is applied to the motor, if the rotor cannot rotate, the heat generated by the motor is small, so that the motor cannot be easily burnt, and the generated heat can also be used for melting frost on the mover; and then the voltage value is gradually increased, so that the melting of frost on the rotor can be accelerated, the torque of the rotor can be increased by the high voltage value, and the rotor can be rotated more easily. After long-term work practice of the inventor, the voltage value of each time is improved by 0.2-2V (volt) compared with the previous time, and the second preset time is 0.2-1.5s (second), so that the fan can be effectively prevented from being frozen.
Preferably, the acquiring the working state of the fan and determining that the working state meets the preset condition includes: when it is determined that the plurality of voltage values have all been used, a preset condition is met
The obtaining of a plurality of voltage values between a lowest starting voltage and a rated voltage of the fan includes: the method comprises the steps of obtaining a plurality of voltage values between the lowest starting voltage and the rated voltage of the fan, and when the voltage values are sorted according to the size, the voltage values are in an arithmetic progression, and the tolerance is greater than or equal to 0.2V (volt) and less than or equal to 2V (volt).
Preferably, the second preset time is 0.2s (second) or more and 1.5s (second) or less.
Preferably, the first predetermined time is 2min (minutes) or more and 10min (minutes) or less.
An embodiment of the present invention further provides an apparatus for preventing a fan from being frozen during defrosting for an air-cooled refrigerator, the air-cooled refrigerator including an evaporator, a storage compartment for storing stored items, a fan disposed in an air path from the evaporator to the storage compartment, and a defrosting module for melting frost attached to the evaporator, the method including the following modules:
the pre-processing module is used for receiving a defrosting instruction, controlling the evaporator to stop refrigerating, controlling the fan to stop rotating and controlling the defrosting module to start defrosting, and setting a first timer which is overtime after a first preset time;
and the fan control module is used for starting the fan to rotate when the first timer is determined to be overtime.
The embodiment of the invention also provides a refrigerator which is provided with the device for preventing the fan from being frozen.
The second embodiment of the invention provides a method for preventing a fan from being frozen during defrosting of an air-cooled refrigerator, as shown in fig. 2, comprising the following steps:
step 201: receiving a defrosting instruction, starting defrosting, and controlling the fan to stop rotating; here, starting defrosting includes controlling the evaporator to stop cooling and controlling the defrosting module to start defrosting;
step 202: setting a first timer, wherein the first timer is overtime after a first preset time;
step 203: keeping the fan in a state of stopping rotating;
step 204: whether the first timer is overtime, if yes, executing the step 205, otherwise, executing the step 203;
step 205: whether a defrosting ending instruction is received, if so, executing step 211, otherwise, executing step 206;
step 206: providing the lowest starting voltage for the fan;
step 207: waiting time T2 during which fan rotation is maintained;
step 208: increasing the voltage of the fan by V;
step 209: whether the power supply voltage of the fan is larger than the rated voltage or not, if so, executing a step 210, otherwise, executing a step 207;
step 210: stopping the fan from rotating;
step 211: and (6) ending.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (4)

1. A method for preventing a fan from being frozen during defrosting for an air-cooled refrigerator including an evaporator, a storage compartment for storing stored goods, a fan provided in an air path from the evaporator to the storage compartment, and a defrosting module for melting frost attached to the evaporator, the method comprising the steps of:
receiving a defrosting instruction, controlling the evaporator to stop refrigerating, the fan to stop rotating, and controlling the defrosting module to start defrosting, and setting a first timer, wherein the first timer is overtime after a first preset time, and the first preset time is more than or equal to 2min and less than or equal to 10 min;
when determining that the first timer is overtime, starting the fan to rotate, the starting the fan to rotate, comprising: the method comprises the steps of obtaining a plurality of voltage values between the lowest starting voltage and the rated voltage of the fan, and when the voltage values are sorted according to the size, the voltage values are in an arithmetic progression, the tolerance is more than or equal to 0.2V and less than or equal to 2V, and the voltage values comprise the lowest starting voltage and the rated voltage; and continuously selecting the voltage value which is not used yet and is the lowest from the plurality of voltage values, and applying the voltage value to the fan for a second preset time until the plurality of voltage values are used.
2. The method of preventing a wind turbine from being frozen as recited in claim 1, further comprising:
the second preset time is greater than or equal to 0.2s and less than or equal to 1.5 s.
3. An apparatus for preventing a fan from being frozen during defrosting for an air-cooled refrigerator including an evaporator, a storage compartment for storing stored goods, a fan provided in an air path from the evaporator to the storage compartment, and a defrosting module for melting frost attached to the evaporator, the apparatus comprising:
the pre-processing module is used for receiving a defrosting instruction, controlling the evaporator to stop refrigerating, controlling the fan to stop rotating and controlling the defrosting module to start defrosting, and setting a first timer, wherein the first timer is overtime after a first preset time, and the first preset time is more than or equal to 2min and less than or equal to 10 min;
a fan control module configured to start the fan rotation when it is determined that the first timer is expired, the starting the fan rotation includes: the method comprises the steps of obtaining a plurality of voltage values between the lowest starting voltage and the rated voltage of the fan, and when the voltage values are sorted according to the size, the voltage values are in an arithmetic progression, the tolerance is more than or equal to 0.2V and less than or equal to 2V, and the voltage values comprise the lowest starting voltage and the rated voltage; and continuously selecting the voltage value which is not used yet and is the lowest from the plurality of voltage values, and applying the voltage value to the fan for a second preset time until the plurality of voltage values are used.
4. A refrigerator characterized in that it is provided with the device for preventing a blower fan from being frozen as claimed in claim 3.
CN201810502309.9A 2018-05-23 2018-05-23 Method and device for preventing fan from being frozen during defrosting Active CN108895752B (en)

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CN202110289359.5A CN113063248B (en) 2018-05-23 2018-05-23 Air-cooled refrigerator and control method and device of fan of air-cooled refrigerator during defrosting
CN201810502309.9A CN108895752B (en) 2018-05-23 2018-05-23 Method and device for preventing fan from being frozen during defrosting

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JPH08271099A (en) * 1995-03-31 1996-10-18 Mitsubishi Heavy Ind Ltd Heat pump type air conditioner
KR100803574B1 (en) * 2006-10-11 2008-02-15 엘지전자 주식회사 Fan motor driving control apparatus for refrigerator
KR20080035878A (en) * 2006-10-20 2008-04-24 엘지전자 주식회사 Air-conditioner and defrosting method of the same air-conditioner
KR100860230B1 (en) * 2008-04-18 2008-09-25 한라산업개발 주식회사 Infiltration system with cleaning system using riverbed filtration
KR101573538B1 (en) * 2009-02-11 2015-12-02 엘지전자 주식회사 Control method of refrigerator
CN103335469B (en) * 2013-07-15 2016-08-10 合肥美的电冰箱有限公司 The control method of wind cooling refrigerator and wind cooling refrigerator
CN104266439A (en) * 2014-09-30 2015-01-07 海信容声(广东)冰箱有限公司 Variable-frequency refrigerator and defrosting method thereof
CN105043007B (en) * 2015-07-07 2017-12-19 合肥美的电冰箱有限公司 The control method and refrigerator of refrigerator
CN107062771B (en) * 2017-03-21 2019-09-17 Tcl家用电器（合肥）有限公司 Defrosting control method and wind cooling refrigerator

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