CN112460905B - Refrigerator return air defrosting control method and device and air-cooled refrigerator - Google Patents

Refrigerator return air defrosting control method and device and air-cooled refrigerator Download PDF

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Publication number
CN112460905B
CN112460905B CN202011308657.6A CN202011308657A CN112460905B CN 112460905 B CN112460905 B CN 112460905B CN 202011308657 A CN202011308657 A CN 202011308657A CN 112460905 B CN112460905 B CN 112460905B
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Prior art keywords
temperature
chamber
air
defrosting
preset
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CN112460905A (en
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卢起彪
邓涵
朱文琪
陆文怡
孟贺
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • 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
    • 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
    • F25D21/008—Defroster control by timer
    • 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
    • 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
    • F25D2600/02—Timing
    • 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
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

Abstract

The invention discloses a method and a device for controlling return air and defrosting of a refrigerator and an air-cooled refrigerator. Wherein, the method comprises the following steps: when the defrosting condition is met, controlling the specified chamber to operate according to a preset mode so as to improve the temperature of the specified chamber; when the operation of the designated compartments meets the preset conditions, defrosting is carried out by utilizing the return air of each compartment; controlling the closing of the air door of the corresponding compartment according to the temperature condition of each compartment; and if all the compartment air doors are closed or the air returning defrosting time reaches a first preset time, stopping returning air for defrosting. When the air return defrosting device meets the defrosting condition, the designated compartment is kept to operate at a relatively high temperature before air return defrosting, the available heat during the air return defrosting is increased, and the temperature of the designated compartment is prevented from being too low in the air return defrosting process. All compartments participate in return air defrosting, and the compartment air doors are controlled to be closed in time according to the temperature conditions of the compartments, so that the heat of the compartments is fully utilized in the return air defrosting, and the condition that the temperature change of the compartments affects the freshness of food materials in the compartments can be avoided.

Description

Refrigerator return air defrosting control method and device and air-cooled refrigerator
Technical Field
The invention relates to the technical field of refrigerators, in particular to a method and a device for controlling air return and defrosting of a refrigerator and an air-cooled refrigerator.
Background
At present, the conventional defrosting control of the air-cooled refrigerator generally adopts that defrosting is performed for 5-10 min by utilizing return air of a refrigerating chamber after refrigeration is stopped and before a defrosting heater is started under a defrosting condition, so that the working time of the electric heater is shortened, and the defrosting power consumption is reduced.
However, the above defrosting method has the following problems:
1. if the time for returning air and defrosting is too short, the heat of the refrigerating chamber cannot be fully utilized, and the energy-saving effect is poor;
2. if the time for defrosting the return air is too long, the return air of the refrigerating chamber is cooled by the frost layer of the evaporator and then is continuously sent to the refrigerating chamber, so that the temperature of the refrigerating chamber is lower than zero, and refrigerated food materials are frosted;
3. the variable-temperature chamber does not participate in return air defrosting basically, and the heat of the variable-temperature chamber is not fully utilized for defrosting.
Aiming at the problems that in the prior art, heat is not fully utilized and food materials are not favorable for preservation when air return of a refrigerator is defrosted, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a refrigerator return air defrosting control method and device and an air-cooled refrigerator, and aims to at least solve the problems that in the prior art, heat is not fully utilized and food materials are not favorable for fresh keeping when the refrigerator returns air to defrost.
In order to solve the technical problem, an embodiment of the invention provides a method for controlling return air defrosting of a refrigerator, which comprises the following steps:
when the defrosting condition is met, controlling a designated compartment in the refrigerator to operate according to a preset mode so as to improve the temperature of the designated compartment;
when the operation of the designated compartments meets the preset conditions, defrosting is carried out by utilizing the return air of each compartment;
controlling the closing of the air door of the corresponding compartment according to the temperature condition of each compartment;
and if the air doors of all the compartments are closed completely or the time of returning the air to defrost reaches a first preset time, stopping returning the air to defrost.
Optionally, controlling a designated compartment in the refrigerator to operate according to a preset mode includes:
re-determining the starting point temperature and/or the stopping point temperature of the designated chamber according to the set temperature of the designated chamber at the current environment temperature;
and controlling the designated compartment to operate according to the re-determined starting point temperature and/or stopping point temperature so as to increase the temperature of the designated compartment.
Optionally, re-determining the shutdown point temperature of the designated compartment comprises: and taking the set temperature of the specified chamber at the current ambient temperature as the shutdown point temperature of the specified chamber.
Optionally, when the operation of the designated compartment meets a preset condition, defrosting is performed by using return air of each compartment, including:
if the time length of the operation of the designated chamber according to the preset mode reaches a second preset time length, or the frequency of the designated chamber reaching the temperature of the stop point reaches a preset frequency, determining that the operation of the designated chamber meets a preset condition;
and (4) controlling the compressor to stop, starting the fan in the air duct, and opening the air doors of the chambers to start air return and defrosting.
Optionally, the controlling the closing of the damper of each compartment according to the temperature condition of each compartment includes:
when the actual temperature of the refrigerating chamber is less than or equal to a first preset temperature, closing a damper of the refrigerating chamber;
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the first preset temperature, closing an air door of the temperature-changing chamber, wherein the second preset temperature is greater than the first preset temperature;
under the condition that the set temperature of the variable temperature chamber is lower than the second preset temperature, when the actual temperature of the variable temperature chamber is higher than or equal to the initial temperature of the variable temperature chamber when return air is returned for defrosting, closing an air door of the variable temperature chamber;
and when the actual temperature of the freezing chamber is greater than or equal to the initial temperature of the freezing chamber when return air is returned to defrost, closing the air door of the freezing chamber.
Optionally, the controlling the closing of the damper of each compartment according to the temperature condition of each compartment includes:
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a third preset temperature and less than a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the third preset temperature, closing an air door of the temperature-changing chamber;
under the condition that the set temperature of the variable temperature chamber is less than a third preset temperature, when the actual temperature of the variable temperature chamber is less than or equal to the fourth preset temperature, or when the actual temperature of the variable temperature chamber is greater than or equal to the initial temperature of the variable temperature chamber when air return defrosting is carried out, an air door of the variable temperature chamber is closed, wherein the fourth preset temperature is less than the third preset temperature.
Optionally, if the freezing chamber is not provided with an air door, when the time for returning the air to defrost reaches the first preset time, or when the actual temperature of the freezing chamber is greater than or equal to the set temperature of the freezing chamber, the returning of the air to defrost is stopped.
The embodiment of the invention also provides a device for controlling the return air and defrosting of the refrigerator, which comprises:
the first control module is used for controlling a designated compartment in the refrigerator to operate according to a preset mode when a defrosting condition is met so as to improve the temperature of the designated compartment;
the second control module is used for defrosting by utilizing return air of each chamber when the operation of the specified chamber meets the preset condition;
the third control module is used for controlling the closing of the air door of the corresponding compartment according to the temperature condition of each compartment;
and the fourth control module is used for stopping air returning and defrosting if the air doors of all the compartments are completely closed or the time length of air returning and defrosting reaches a first preset time length.
Optionally, the first control module includes:
the first determining unit is used for re-determining the starting point temperature and/or the stopping point temperature of the appointed chamber according to the set temperature of the appointed chamber at the current environment temperature;
and the first control unit is used for controlling the specified chamber to operate according to the redetermined starting point temperature and/or stopping point temperature so as to improve the temperature of the specified chamber.
The embodiment of the invention also provides an air-cooled refrigerator, which comprises: the embodiment of the invention relates to a refrigerator return air defrosting control device.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a method for controlling return air and defrosting of a refrigerator according to an embodiment of the present invention.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for controlling return air defrosting in a refrigerator according to an embodiment of the present invention.
By applying the technical scheme of the invention, when the defrosting condition is met, the appointed compartments are controlled to operate according to the preset mode to increase the temperature of the appointed compartments, and then the return air of each compartment is utilized for defrosting, namely, the appointed compartments are maintained to operate at relatively high temperature before the return air defrosting is carried out, so that the available heat during the return air defrosting period can be increased, and the over-low temperature of the appointed compartments in the return air defrosting process can be avoided. All the compartments participate in air return defrosting, and in the air return defrosting process, the air doors of the corresponding compartments are controlled to be closed in time according to the temperature conditions of the compartments, so that the heat of the compartments is fully utilized in the air return defrosting, and the condition that the temperature change of the compartments affects the freshness of food materials in the compartments can be avoided. If the air doors of all the compartments are completely closed or the time for returning the air to defrost reaches a first preset time, the air is stopped to defrost, so that the heat of each compartment can be fully utilized to defrost under the condition of not influencing the performance of the compartments, and the defrosting power consumption is reduced.
Drawings
Fig. 1 is a flowchart of a method for controlling return air defrosting of a refrigerator according to an embodiment of the present invention;
FIG. 2 is a schematic view of a defrosting control process of a refrigerator according to an embodiment of the present invention;
fig. 3 is a block diagram of a return air defrosting control device of a refrigerator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. The steps illustrated in the flow charts of the drawings may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
The embodiment of the invention provides a method for controlling air return defrosting of a refrigerator, which can be suitable for air return defrosting of an air-cooled refrigerator and can fully utilize heat of a compartment to perform air return defrosting under the condition of not influencing the performance of the compartment.
Fig. 1 is a flowchart of a method for controlling return air defrosting of a refrigerator according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
s101, when the defrosting condition is met, controlling a designated compartment in the refrigerator to operate according to a preset mode so as to improve the temperature of the designated compartment.
And S102, when the operation of the designated compartments meets preset conditions, defrosting is carried out by utilizing return air of each compartment.
And S103, controlling the closing of the air doors of the corresponding chambers according to the temperature conditions of the chambers.
And S104, if the air doors of all the compartments are closed or the time for returning the air to defrost reaches a first preset time, stopping returning the air to defrost.
Wherein, the compartment of the refrigerator may include: the refrigerating chamber, the freezing chamber and the temperature changing chamber, and other special chambers such as an ice making chamber and the like can be included. The variable temperature chamber has different set temperatures and different functions, and for example, the variable temperature chamber operates as a refrigerating chamber when the set temperature is 2 ℃ or higher.
Maintaining a given compartment operating at a relatively high temperature prior to return defrosting can increase the amount of heat available during return defrosting. The designated compartment of the present embodiment may be at least one of all compartments of the refrigerator, and preferably, the designated compartment includes at least a refrigerating compartment. Because the temperature of the freezing chamber is generally increased in the process of electric heating defrosting after air return defrosting, if the temperature of the freezing chamber is increased before air return defrosting, the temperature of the freezing chamber is increased more in the process of subsequent electric heating defrosting, and the preservation performance is possibly influenced, the freezing chamber can be used as a designated chamber under a proper condition, and the available heat of the freezing chamber is increased by operating at a higher temperature. Similarly, when the set temperature of the temperature-variable chamber is below 2 ℃, the stored objects are nearly frozen, and the temperature rise may affect the fresh-keeping performance, so that the temperature-variable chamber can be used as a designated chamber under proper conditions, and the heat available by the temperature-variable chamber is increased by operating at higher temperature. The preset mode is an operation mode capable of increasing the temperature of a designated compartment. The preset condition is a condition that can determine that the designated compartment is maintained at a relatively high temperature, and may be, for example, a time condition, a temperature condition, or the like.
The air doors of the corresponding compartments are controlled to be closed according to the temperature conditions of the compartments, namely, the air doors of the compartments can be closed under the condition that the actual temperature of the compartments meets corresponding conditions, so that the heat of the compartments is fully utilized in return air defrosting, and the condition that the temperature change of the compartments affects the freshness of food materials in the compartments can be avoided.
The first preset time period may be the maximum time period limit of return air defrosting that can be accepted on the premise of not affecting refrigeration of the refrigerator and food preservation, and is set to 10min, for example. The specific operation of stopping return air and defrosting is as follows: the fan in the air duct is closed and the air doors of the compartments are closed, so that the return air does not enter the evaporation cavity any more. After the return air defrosting is stopped, the electric heater can be started to continue defrosting.
According to the method for controlling the return air defrosting of the refrigerator, when the defrosting condition is met, the specified compartments are controlled to operate according to the preset mode to improve the temperature of the specified compartments, then the return air of each compartment is utilized to defrost, namely, before the return air defrosting is carried out, the specified compartments are kept to operate at relatively high temperature, the available heat during the return air defrosting period can be increased, and meanwhile, the temperature of the specified compartments is too low in the return air defrosting process. All the compartments participate in air return defrosting, and in the air return defrosting process, the air doors of the corresponding compartments are controlled to be closed in time according to the temperature conditions of the compartments, so that the heat of the compartments is fully utilized in the air return defrosting, and the condition that the temperature change of the compartments affects the freshness of food materials in the compartments can be avoided. If the air doors of all the compartments are completely closed or the time for returning the air to defrost reaches a first preset time, the air is stopped to defrost, so that the heat of each compartment can be fully utilized to defrost under the condition of not influencing the performance of the compartments, and the defrosting power consumption is reduced.
In one embodiment, controlling a designated compartment in a refrigerator to operate in a preset manner includes: re-determining the starting point temperature and/or the stopping point temperature of the designated chamber according to the set temperature of the designated chamber at the current environment temperature; and controlling the designated compartment to operate according to the re-determined starting point temperature and/or stopping point temperature so as to increase the temperature of the designated compartment.
For the refrigerator, the starting point temperature refers to the temperature at which refrigeration needs to be started, and the stopping point temperature refers to the temperature at which refrigeration needs to be stopped. The compartments are correspondingly provided with different set temperatures (namely target temperatures which the compartments want to reach) and relatively independent starting point temperatures and stopping point temperatures under different environmental temperatures so as to meet the refrigeration requirements of the compartments. The starting point temperature of the same chamber under the same operation state (the operation state is determined by the environment temperature and the set temperature) is higher than the stopping point temperature. For example, when the temperature of the refrigerating chamber is increased to the corresponding starting point temperature, the air door of the refrigerating chamber is opened, so that cold air is fed into the refrigerating chamber to refrigerate, and when the temperature of the refrigerating chamber is reduced to the corresponding stopping point temperature, the air door of the refrigerating chamber is closed, and refrigeration of the refrigerating chamber is stopped. The original starting point temperature and/or the original stopping point temperature of the designated compartment can be specifically improved.
The present embodiment enables the designated compartment to be maintained at a higher temperature by re-determining the start-up point temperature and/or the stop point temperature of the designated compartment, thereby increasing the amount of heat available during return defrosting.
Considering that the set temperature of a compartment is generally higher than the stop point temperature of that compartment in this operating state, the set temperature of the specified compartment at the current ambient temperature may be taken as the stop point temperature of the specified compartment when the stop point temperature of the specified compartment is newly determined. By increasing the shutdown point temperature of the compartment, the compartment temperature can be maintained at a higher temperature simply and effectively.
Illustratively, the temperature of the refrigerating chamber is set to be 5 ℃, the temperature of a starting point is 7.5 ℃, the temperature of an idle point is 3.5 ℃, and before the defrosting condition is met and return air defrosting is carried out, the refrigerating chamber can be controlled to operate according to the temperature of the starting point to be 7.5 ℃ and the temperature of the idle point to be 5 ℃, so that the average temperature of the refrigerating chamber is higher, and the available heat during return air defrosting is increased.
In one embodiment, when the operation of the designated compartment meets a preset condition, defrosting by using return air of each compartment comprises the following steps: if the time length of the operation of the designated chamber according to the preset mode reaches a second preset time length, or the frequency of the designated chamber reaching the temperature of the stop point reaches a preset frequency, determining that the operation of the designated chamber meets a preset condition; and (4) controlling the compressor to stop, starting the fan in the air duct, and opening the air doors of the chambers to start air return and defrosting.
The preset condition is that the time length of the operation of the appointed chamber according to the preset mode reaches a second preset time length or the frequency of the appointed chamber reaching the temperature of the stop point reaches a preset frequency. The second predetermined period of time during which the compartment is capable of undergoing at least one on-off operation may be determined by a number of tests during refrigerator design or manufacture, for example, the second predetermined period of time may be set to 1 hour. The specific operation of starting return air defrosting is as follows: the compressor is controlled to stop, the fan in the air duct is started, the air door of each chamber is opened, namely, the refrigeration is stopped, the fan and the air door are opened, and the return air of each chamber enters the evaporation cavity under the driving of the fan to defrost the evaporator.
This embodiment confirms that appointed compartment maintains in higher temperature operation through the preset condition, guarantees that the compartment can provide more usable heat for return air defrosting, controls relevant device this moment and makes all compartments participate in the return air defrosting, has reached the effect that make full use of compartment heat carries out return air defrosting.
In one embodiment, controlling the closing of the respective compartment damper based on the temperature profile of each compartment comprises:
when the actual temperature of the refrigerating chamber is less than or equal to a first preset temperature, closing a damper of the refrigerating chamber;
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the first preset temperature, closing an air door of the temperature-changing chamber, wherein the second preset temperature is greater than the first preset temperature;
under the condition that the set temperature of the variable temperature chamber is lower than the second preset temperature, when the actual temperature of the variable temperature chamber is higher than or equal to the initial temperature of the variable temperature chamber when return air is returned for defrosting, closing an air door of the variable temperature chamber;
and when the actual temperature of the freezing chamber is greater than or equal to the initial temperature of the freezing chamber when return air is returned to defrost, closing the air door of the freezing chamber.
The first preset temperature can be set according to the set temperature of the refrigerating chamber and the type of food materials stored in the refrigerating chamber, for example, the set temperature of the refrigerating chamber is generally greater than or equal to 2 ℃, and thus the first preset temperature can be set to 1 ℃. When the actual temperature of the refrigerating chamber is greater than or equal to the first preset temperature, the air door of the refrigerating chamber is closed, air supply to the refrigerating chamber can be stopped in time in the air return defrosting process, the refrigerating chamber is prevented from being too low in temperature, and the food material fresh-keeping performance of the refrigerating chamber is guaranteed.
The air cooled by the evaporator frost layer is considered to be a little high in temperature requirement of the freezing chamber, and the freezing chamber is not refrigerated during the air return defrosting, so that the temperature rise of the freezing chamber is high during the air return defrosting, but the temperature of the freezing chamber cannot rise immediately after the air return defrosting starts, and the temperature of the freezing chamber can be reduced to a certain extent in a very short initial time.
The second preset temperature is a temperature threshold value for changing the function of the temperature-changing chamber, and for example, the second preset temperature may be set to 2 ℃. If the set temperature of the temperature-changing chamber is greater than or equal to the second preset temperature, the temperature-changing chamber is regarded as a refrigerating chamber, under the condition, the air door of the temperature-changing chamber is controlled to be the same as the refrigerating chamber in the air returning and defrosting process, air can be timely stopped to be supplied to the temperature-changing chamber in the air returning and defrosting process, the temperature of the temperature-changing chamber is prevented from being too low, and the food material preservation performance of the temperature-changing chamber as the refrigerating chamber is guaranteed. If the set temperature of the temperature-changing chamber is lower than the second preset temperature, the air door of the temperature-changing chamber can be controlled according to the air door control mode of the freezing chamber.
The air door is controlled to be closed according to the temperature condition of each compartment, so that the heat of each compartment is fully utilized to defrost, and the food material fresh-keeping performance of each compartment cannot be influenced due to temperature change of the compartment.
In one embodiment, controlling the closing of the respective compartment damper based on the temperature profile of each compartment comprises:
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a third preset temperature and less than a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the third preset temperature, closing an air door of the temperature-changing chamber;
under the condition that the set temperature of the variable temperature chamber is less than a third preset temperature, when the actual temperature of the variable temperature chamber is less than or equal to the fourth preset temperature, or when the actual temperature of the variable temperature chamber is greater than or equal to the initial temperature of the variable temperature chamber when air return defrosting is carried out, an air door of the variable temperature chamber is closed, wherein the fourth preset temperature is less than the third preset temperature.
The third preset temperature is similar to the second preset temperature and is a temperature threshold for changing the function of the temperature-changing chamber, preferably, the third preset temperature may be a temperature threshold for distinguishing whether the food material is frozen, for example, the third preset temperature may be set to 0 ℃. The set temperature of the temperature-changing chamber is divided into more detailed intervals by utilizing the second preset temperature and the third preset temperature, so that the air door of the temperature-changing chamber can be controlled more accurately.
Under the condition that the set temperature of the temperature-changing chamber is greater than or equal to the third preset temperature and less than the second preset temperature, the food materials are required to be guaranteed not to freeze, and therefore when the actual temperature of the temperature-changing chamber is less than or equal to the third preset temperature, the air door of the temperature-changing chamber is closed in time, and the food materials are prevented from freezing due to the fact that the temperature of the temperature-changing chamber is further reduced.
The fourth preset temperature may be set according to the temperature set in the variable temperature chamber and the kind of food stored therein, for example, the fourth preset temperature may be set to-3 ℃. Under the condition that the temperature set in the temperature-changing chamber is lower than the third preset temperature, food materials are allowed to freeze, in order to fully utilize heat, a fourth preset temperature lower than the third preset temperature can be set, and when the actual temperature of the temperature-changing chamber is lower than or equal to the fourth preset temperature, an air door of the temperature-changing chamber is closed. Or when the actual temperature of the variable temperature chamber is greater than or equal to the initial temperature of the variable temperature chamber when the return air is turned into the variable temperature chamber for defrosting, namely the temperature of the variable temperature chamber is increased to some extent, the air door of the variable temperature chamber is closed, and the temperature rise of the variable temperature chamber is avoided from being overlarge.
This embodiment utilizes the second to predetermine temperature and the third temperature of predetermineeing and carries out more careful interval division to the temperature setting for the variable temperature chamber to can carry out more accurate control to the variable temperature chamber air door, make variable temperature chamber heat utilize more fully, and can satisfy the fresh-keeping demand of the indoor edible material of variable temperature.
In one embodiment, if the freezing chamber is not provided with a damper, the return of the air for defrosting is stopped when the time period for returning the air for defrosting reaches the first preset time period or the actual temperature of the freezing chamber is greater than or equal to the set temperature of the freezing chamber.
In this embodiment, the freezer does not set up the air door, can not appear great temperature rise in order to guarantee the freezer in the time spent of returning air defrosting, when satisfying that the time spent of returning air defrosting reaches first predetermined duration or the freezer actual temperature is greater than or equal to the condition of freezer set temperature, immediately stop returning air defrosting, even other rooms still have the heat to utilize the defrosting this moment, also give priority to the control to the freezer temperature rise condition, it is too big to preferentially guarantee the freezer temperature rise, such control is more reliable, because after the return air defrosting, the electrical heating defrosting still can further make the freezer temperature rise.
The method for controlling return air defrosting of a refrigerator is described below with reference to a specific embodiment, however, it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as a limitation to the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
Referring to fig. 2, the refrigerator defrosting control includes the steps of:
and S201, refrigerating operation of the refrigerator.
And S202, judging whether the defrosting condition is met, if so, entering the step S203, otherwise, returning to the step S201 to continue the cooling operation.
S203, taking the set temperature of the chamber as the new stop point temperature T of the chamberOFFAnd when the starting point temperature is not changed, the control chamber operates for t1 time according to the new stopping point temperature. In fig. 2, a refrigerating chamber is taken as an example.
And S204, returning air to defrost, stopping the compressor, starting a fan in the air channel, and opening air doors of the compartments. And proceeds to the judgment of S205, S207, S211 and S214 at the same time.
S205, judging the current actual temperature T of the refrigerating chamber1And if the temperature is less than or equal to 1 ℃, entering the step S206, and if not, continuously judging the current actual temperature of the refrigerating chamber.
S206, closing the refrigerating chamber air door.
S207, judging the set temperature T of the temperature-changing chamberbIf T isbAt the temperature of more than or equal to 2 ℃, entering the step S208, if the temperature is less than or equal to 0 ℃ and T is more than or equal tobIf T is less than 2 ℃, the process proceeds to step S209bBelow 0 ℃ intoStep S210.
S208, when the current actual temperature T of the temperature-changing chamber2When the temperature is less than or equal to 1 ℃, the air door of the temperature-variable chamber is closed.
S209, when the current actual temperature T of the temperature-changing chamber2When the temperature is less than or equal to 0 ℃, the air door of the temperature-variable chamber is closed.
S210, when the current actual temperature T of the temperature-changing chamber2Less than or equal to-3 ℃ or T2And closing the air door of the temperature-variable chamber when the initial temperature of return air defrosting of the temperature-variable chamber is not lower than the initial temperature.
S211, judging the current actual temperature T of the freezing chamber3And (4) judging whether the temperature is more than or equal to the initial return air defrosting temperature of the freezing chamber, if so, entering the step S212, and if not, continuously judging the current actual temperature of the freezing chamber.
S212, the freezing chamber air door is closed.
S213, determines whether or not all the dampers of all the chambers are closed, if so, the process proceeds to step S215, and if not, the process returns to step S204.
S214, judging whether the time length of return air defrosting is greater than or equal to t2, if so, going to step S215, and if not, returning to step S204.
And S215, stopping returning air and defrosting.
And S216, turning on the electric heater to perform electric heating defrosting.
In the embodiment, after the normal refrigeration operation of the refrigerator meets the defrosting condition, in a preset time T1 before return air is returned for defrosting, a compartment (such as a refrigerating compartment) is assigned to be at the set temperature T of the compartmentaAs the temperature T of the stopping pointOFF(corresponding to the increase of the temperature at the stop point), the temperature T at the start pointONThe control is carried out in such a way that the temperature of the specified compartment is maintained at a higher temperature. Of course, the above control rules are only examples, and the start point temperature and/or the stop point temperature of each compartment within the preset time t1 may be set according to the actual operation condition of the refrigerator, so that the corresponding compartment of the refrigerator may operate at a higher temperature in a corresponding state before the return air is defrosted. If the set temperature T of the temperature-changing chamberbAnd the temperature is more than or equal to 2 ℃, the refrigerating chamber is regarded as the refrigerating chamber, and the operation is also carried out according to the control rule. Set temperature T for freezing chamber and temperature-changing chamberbIn the case of less than 2 ℃, the stored food materials need to be frozen and the temperature risesMay affect the freshness performance and may also be operated at higher temperatures under appropriate conditions to increase the available heat.
When the preset time t1 is reached, the control mode is withdrawn to start return air defrosting, and of course, the mode can be withdrawn under the control of a node when the nth time (N is more than or equal to 1) of the compartment reaches the shutdown point temperature.
And (4) returning air to defrost, stopping the operation of the compressor, fully opening the fans in the air duct and the air doors of all the compartments, and participating in the return air defrosting of all the compartments. Before entering return air for defrosting, the room temperature is maintained at a higher level, so that a large amount of heat exists, and the return air temperature is favorably improved for defrosting. The heat of the refrigerating chamber, the temperature changing chamber and the freezing chamber is brought to the evaporation chamber along with the return air, so that the temperature of a frost layer on the evaporator is increased, the temperature of the return air is reduced due to the cold quantity of the frost layer after passing through the evaporator, and then the return air enters each compartment from the air duct, so that the temperature of the compartment is reduced.
In the process of return air defrosting, the air doors of each compartment are controlled to be closed according to the following rules:
1. when the actual temperature T of the refrigerating chamber1When the temperature is less than or equal to 1 ℃, closing the air door of the refrigerating chamber;
2. set temperature T in temperature-variable chamberbWhen the actual temperature T of the temperature-changing chamber is more than or equal to 2 DEG C2When the temperature is less than or equal to 1 ℃, closing an air door of the temperature-variable chamber;
3. setting temperature T in temperature-variable chamber at 0 ℃ ≤bUnder the condition of < 2 ℃, when the actual temperature T of the temperature-changing chamber2When the temperature is less than or equal to 0 ℃, closing the air door of the temperature-variable chamber;
4. set temperature T in temperature-variable chamberbUnder the condition of < 0 ℃, when the actual temperature T of the temperature-changing chamber2At-3 deg.C or below, or when the actual temperature T of the temperature-changing chamber is higher than2Closing the air door of the temperature-variable chamber when the initial temperature of return air defrosting of the temperature-variable chamber is not less than the initial temperature;
5. when actual temperature T of the freezing chamber3And closing the air door of the freezing chamber when the air return defrosting initial temperature of the freezing chamber is not less than the air return defrosting initial temperature of the freezing chamber.
And when all the compartments meet the air door closing condition, or the air returning defrosting time is more than or equal to the preset time t2, closing all the air doors, closing the fan and stopping the air returning defrosting.
For the refrigerator without a ventilation door in the freezing chamber, when the return air defrosting time is more than or equal to the preset time T2, the fan is closed to stop the return air defrosting, and the actual temperature T of the freezing chamber can be controlled3And when the temperature of the freezing chamber is not lower than the set temperature, the fan is turned off, and air return is stopped to defrost. At the moment, even if other compartments have heat which can be utilized for defrosting, the temperature rise of the freezing compartment is preferably ensured not to be too large, so that the control is more reliable.
And after the return air defrosting is stopped, starting a normal electric heating defrosting process, returning to a refrigeration mode after the defrosting is finished, and repeating the actions until the defrosting condition is met next time.
The temperature points of the refrigerating chamber, the temperature-changing chamber, and the closing damper for the freezing chamber are set as described above, and may be appropriately adjusted according to the actual set value of the temperature of the compartment and the type of food to be stored, in order to sufficiently utilize the heat of each compartment.
When the defrosting condition is met, the appointed compartments are controlled to be refrigerated according to the preset mode to improve the temperature of the appointed compartments, then the return air of each compartment is utilized to defrost, namely, before the return air defrosting is carried out, the appointed compartments are kept to operate at relatively high temperature, the available heat of the return air defrosting period can be increased, and meanwhile, the temperature of the appointed compartments is too low in the return air defrosting process. All the compartments participate in air return defrosting, and in the air return defrosting process, the air return defrosting process is controlled according to the temperature change of the compartments by combining the actual running condition of the refrigerator, so that the heat of each compartment is fully utilized for air return defrosting. If the air doors of all the compartments are completely closed or the time for returning the air to defrost reaches a first preset time, the air is stopped to defrost, so that the heat of each compartment can be fully utilized to defrost under the condition of not influencing the performance of the compartments, and the defrosting power consumption is reduced.
Based on the same inventive concept, the embodiment provides a refrigerator return air defrosting control device, which can be used for realizing the refrigerator return air defrosting control method described in the embodiment. The device may be implemented in software and/or hardware, and the device may be generally integrated into a refrigerator controller.
Fig. 3 is a block diagram of a return air defrosting control device of a refrigerator according to an embodiment of the present invention, and as shown in fig. 3, the device includes:
the first control module 31 is used for controlling a designated compartment in the refrigerator to operate according to a preset mode when a defrosting condition is met so as to increase the temperature of the designated compartment;
the second control module 32 is used for defrosting by utilizing the return air of each chamber when the operation of the specified chamber meets the preset condition;
a third control module 33 for controlling the closing of the damper of the corresponding compartment according to the temperature condition of each compartment;
and the fourth control module 34 is configured to stop returning the air for defrosting if the air doors of all the compartments are completely closed or the time for returning the air for defrosting reaches a first preset time.
Optionally, the first control module 31 includes:
the first determining unit is used for re-determining the starting point temperature and/or the stopping point temperature of the appointed chamber according to the set temperature of the appointed chamber at the current environment temperature;
and the first control unit is used for controlling the specified chamber to operate according to the redetermined starting point temperature and/or stopping point temperature so as to improve the temperature of the specified chamber.
Optionally, the first determining unit is specifically configured to: and taking the set temperature of the specified chamber at the current ambient temperature as the shutdown point temperature of the specified chamber.
Optionally, the second control module 32 includes:
a second determining unit, configured to determine that operation of the designated chamber meets a preset condition if the time length for which the designated chamber operates according to the preset manner reaches a second preset time length, or the number of times for which the designated chamber reaches the shutdown point temperature reaches a preset number of times;
and the second control unit is used for controlling the compressor to stop, starting the fan in the air duct, and opening the air doors of the chambers to start air return and defrosting.
Optionally, the third control module 33 is specifically configured to:
when the actual temperature of the refrigerating chamber is less than or equal to a first preset temperature, closing a damper of the refrigerating chamber;
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the first preset temperature, closing an air door of the temperature-changing chamber, wherein the second preset temperature is greater than the first preset temperature;
under the condition that the set temperature of the variable temperature chamber is lower than the second preset temperature, when the actual temperature of the variable temperature chamber is higher than or equal to the initial temperature of the variable temperature chamber when return air is returned for defrosting, closing an air door of the variable temperature chamber;
and when the actual temperature of the freezing chamber is greater than or equal to the initial temperature of the freezing chamber when return air is returned to defrost, closing the air door of the freezing chamber.
Optionally, the third control module 33 is specifically configured to:
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a third preset temperature and less than a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the third preset temperature, closing an air door of the temperature-changing chamber;
under the condition that the set temperature of the variable temperature chamber is less than a third preset temperature, when the actual temperature of the variable temperature chamber is less than or equal to the fourth preset temperature, or when the actual temperature of the variable temperature chamber is greater than or equal to the initial temperature of the variable temperature chamber when air return defrosting is carried out, an air door of the variable temperature chamber is closed, wherein the fourth preset temperature is less than the third preset temperature.
Optionally, the fourth control module 34 is further configured to: if the freezing chamber is not provided with an air door, the air return defrosting is stopped when the air return defrosting time reaches the first preset time or the actual temperature of the freezing chamber is greater than or equal to the set temperature of the freezing chamber.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The embodiment provides an air-cooled refrigerator, including: the refrigerator return air defrosting control device of the embodiment.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the method for controlling return air defrosting of a refrigerator as described in the above embodiments.
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for controlling return air defrosting of a refrigerator as described in the above embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (9)

1. A method for controlling return air defrosting of a refrigerator is characterized by comprising the following steps:
when the defrosting condition is met, controlling a designated compartment in the refrigerator to operate according to a preset mode so as to improve the temperature of the designated compartment;
when the operation of the appointed compartments meets a preset condition, defrosting by utilizing return air of each compartment, wherein the preset condition is that the operation time of the appointed compartments according to the preset mode reaches a second preset time or the frequency of the appointed compartments reaching the shutdown point temperature reaches a preset frequency;
the air doors of the corresponding compartments are controlled to be closed according to the temperature conditions of the compartments, so that the heat of the compartments is fully utilized in return air defrosting, and the influence of temperature change of the compartments on the fresh keeping of food materials in the compartments is avoided;
if the air doors of all the compartments are closed or the time for returning air and defrosting reaches a first preset time, stopping returning air and defrosting;
wherein, control the operation of appointed room in the refrigerator according to preset mode, include:
re-determining the starting point temperature and/or the stopping point temperature of the designated chamber according to the set temperature of the designated chamber at the current environment temperature;
controlling the specified chamber to operate according to the redetermined starting point temperature and/or stopping point temperature so as to improve the temperature of the specified chamber;
controlling the closing of the respective compartment damper according to the temperature condition of each compartment, comprising:
when the actual temperature of the refrigerating chamber is less than or equal to a first preset temperature, closing a damper of the refrigerating chamber;
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the first preset temperature, closing an air door of the temperature-changing chamber, wherein the second preset temperature is greater than the first preset temperature;
under the condition that the set temperature of the variable temperature chamber is lower than the second preset temperature, when the actual temperature of the variable temperature chamber is higher than or equal to the initial temperature of the variable temperature chamber when return air is returned for defrosting, closing an air door of the variable temperature chamber;
and when the actual temperature of the freezing chamber is greater than or equal to the initial temperature of the freezing chamber when return air is returned to defrost, closing the air door of the freezing chamber.
2. The method of claim 1, wherein re-determining the shutdown point temperature for the designated compartment comprises:
and taking the set temperature of the specified chamber at the current ambient temperature as the shutdown point temperature of the specified chamber.
3. The method of claim 1, wherein defrosting with return air from each compartment when the operation of the designated compartment meets a preset condition comprises:
if the time length of the operation of the designated chamber according to the preset mode reaches a second preset time length, or the frequency of the designated chamber reaching the temperature of the stop point reaches a preset frequency, determining that the operation of the designated chamber meets a preset condition;
and (4) controlling the compressor to stop, starting the fan in the air duct, and opening the air doors of the chambers to start air return and defrosting.
4. The method of claim 1, wherein controlling the closing of the respective compartment damper based on the temperature condition of each compartment comprises:
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a third preset temperature and less than a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the third preset temperature, closing an air door of the temperature-changing chamber;
under the condition that the set temperature of the variable temperature chamber is less than a third preset temperature, when the actual temperature of the variable temperature chamber is less than or equal to the fourth preset temperature, or when the actual temperature of the variable temperature chamber is greater than or equal to the initial temperature of the variable temperature chamber when air return defrosting is carried out, an air door of the variable temperature chamber is closed, wherein the fourth preset temperature is less than the third preset temperature.
5. The method according to any one of claims 1 to 4, wherein if the freezer compartment is not provided with a damper, the return defrosting is stopped when the period of time for returning the defrosting reaches the first preset period of time or the actual temperature of the freezer compartment is greater than or equal to the set temperature of the freezer compartment.
6. The utility model provides a refrigerator return air defrosting controlling means which characterized in that includes:
the first control module is used for controlling a designated compartment in the refrigerator to operate according to a preset mode when a defrosting condition is met so as to improve the temperature of the designated compartment;
the second control module is used for defrosting by utilizing return air of each chamber when the operation of the appointed chamber meets a preset condition, wherein the preset condition is that the time length of the operation of the appointed chamber according to the preset mode reaches a second preset time length or the frequency of the appointed chamber reaching the temperature of a stop point reaches a preset frequency;
the third control module is used for controlling the closing of the air doors of the corresponding compartments according to the temperature conditions of the compartments so as to fully utilize the heat of the compartments in return air defrosting and avoid the influence of temperature change of the compartments on the freshness of food materials in the compartments;
the fourth control module is used for stopping air returning and defrosting if the air doors of all the compartments are completely closed or the air returning and defrosting time reaches a first preset time;
the first control module includes:
the first determining unit is used for re-determining the starting point temperature and/or the stopping point temperature of the appointed chamber according to the set temperature of the appointed chamber at the current environment temperature;
the first control unit is used for controlling the specified chamber to operate according to the redetermined starting point temperature and/or stopping point temperature so as to improve the temperature of the specified chamber;
the third control module is specifically configured to:
when the actual temperature of the refrigerating chamber is less than or equal to a first preset temperature, closing a damper of the refrigerating chamber;
under the condition that the set temperature of the temperature-changing chamber is greater than or equal to a second preset temperature, when the actual temperature of the temperature-changing chamber is less than or equal to the first preset temperature, closing an air door of the temperature-changing chamber, wherein the second preset temperature is greater than the first preset temperature;
under the condition that the set temperature of the variable temperature chamber is lower than the second preset temperature, when the actual temperature of the variable temperature chamber is higher than or equal to the initial temperature of the variable temperature chamber when return air is returned for defrosting, closing an air door of the variable temperature chamber;
and when the actual temperature of the freezing chamber is greater than or equal to the initial temperature of the freezing chamber when return air is returned to defrost, closing the air door of the freezing chamber.
7. An air-cooled refrigerator, comprising: the refrigerator return air defrosting control device of claim 6.
8. A computer-readable storage medium on which a computer program is stored, wherein the program, when executed by a processor, implements the method for controlling return air defrosting of a refrigerator according to any one of claims 1 to 5.
9. An electronic device, comprising: one or more processors; a memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of controlling return defrosting of a refrigerator as claimed in any one of claims 1 to 5.
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