CN112460901A - Refrigerator dehumidification control method and device and air-cooled refrigerator - Google Patents
Refrigerator dehumidification control method and device and air-cooled refrigerator Download PDFInfo
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- CN112460901A CN112460901A CN202011296211.6A CN202011296211A CN112460901A CN 112460901 A CN112460901 A CN 112460901A CN 202011296211 A CN202011296211 A CN 202011296211A CN 112460901 A CN112460901 A CN 112460901A
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/045—Air flow control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
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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
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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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
- F25D2317/04111—Control means therefor
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/10—Sensors measuring the temperature of the evaporator
Abstract
The invention discloses a refrigerator dehumidification control method and device and an air-cooled refrigerator. Wherein, the method comprises the following steps: after defrosting is quitted, the compressor is started, the first fan, the second fan and the compartment air door are controlled to be in a closed state, the second fan is located in the evaporation cavity, and the second fan is used for driving air in the evaporation cavity to blow towards the evaporator; and controlling the opening and closing of the second fan according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity. After defrosting is quitted, the compressor is started, the first fan and the compartment air door are controlled to be in a closed state, the second fan is controlled to be opened and closed according to the surface temperature of the evaporator and the humidity in the evaporation cavity, when the second fan is started, high-temperature high-humidity air in the evaporation cavity is driven to blow to the cooled evaporator, so that the high-temperature high-humidity air is cooled, condensed water is formed on the air on the evaporator to be discharged, the humidity in the evaporation cavity is reduced, normal refrigeration is carried out after dehumidification, the frosting amount of the evaporator during normal refrigeration is reduced, and the refrigeration power consumption is reduced.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator dehumidification control method and device and an air-cooled refrigerator.
Background
The air-cooled refrigerator generally has an automatic defrosting function, and the defrosting mode generally adopted is defrosting by an electric heater. The electric heating pipe is arranged below the evaporator, natural convection and heat radiation of the electric heating pipe are formed by heating air to defrost the evaporator, a large amount of frost water is left on the surface of the evaporator after defrosting, the temperature and humidity in an evaporation cavity where the evaporator is located are too high, and therefore after refrigeration is restarted, the evaporator can be rapidly frosted, the frosting amount is large, and refrigeration power consumption is large.
In addition, a scheme of removing the electric heater and adding a defrosting channel for defrosting is also provided, and during defrosting operation, air with higher temperature in the compartment is sucked into the defrosting channel and enters the evaporation cavity through the fan, so that the evaporator is continuously defrosted. However, the defrosting is carried out only by the air in the compartment with the insufficiently high temperature, the defrosting efficiency is not high enough, the defrosting time is long, if the defrosting is not clean and residual ice is left, the surface of the residual ice can continuously frost when the next refrigeration is carried out, the residual ice is more difficult to melt, and the refrigeration capacity of the evaporator is influenced.
Aiming at the problem that the frosting amount of an evaporator is large when the evaporator is used for refrigerating due to the fact that the temperature and the humidity of an evaporation cavity are high after the refrigerator is defrosted in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a dehumidification control method and device for a refrigerator and an air-cooled refrigerator, and at least solves the problem that in the prior art, the frost formation amount of an evaporator during refrigeration is large due to the fact that the temperature and the humidity of an evaporation cavity are high after the refrigerator is defrosted.
In order to solve the technical problem, an embodiment of the present invention provides a refrigerator dehumidification control method, including:
after defrosting is quitted, the compressor is started, and the first fan, the second fan and the compartment air door are controlled to be in a closed state, wherein the first fan is positioned in the air duct, the second fan is positioned in the evaporation cavity, and the second fan is used for driving air in the evaporation cavity to blow to the evaporator in the opening state;
monitoring the surface temperature of the evaporator and the humidity in the evaporation cavity;
and controlling the second fan to be opened and closed according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity.
Optionally, controlling the second fan to open and close according to the surface temperature of the evaporator and the humidity in the evaporation cavity includes:
if the surface temperature of the evaporator is less than or equal to a preset temperature and the duration time reaches a first preset duration, judging whether the humidity in the evaporation cavity is greater than a preset humidity or not;
if the humidity in the evaporation cavity is greater than the preset humidity, the second fan is started;
and when the humidity in the evaporation cavity is less than or equal to the preset humidity, the second fan is closed.
Optionally, when the second fan is turned on, the method further includes: starting an electric heater and controlling the electric heater to operate according to preset power, wherein the electric heater is positioned below the evaporator; correspondingly, when the second fan is turned off, the method further comprises the following steps: turning off the electric heater.
Optionally, after dehumidifying the air in the evaporation cavity, the method further includes:
opening the first fan and the compartment air door to enable the refrigerator to carry out normal refrigeration; alternatively, the first and second electrodes may be,
and closing the compressor, and after waiting for a second preset time, opening the compressor, the first fan and the compartment air door so as to enable the refrigerator to carry out normal refrigeration.
Optionally, before the defrosting is exited, the method further includes: and in the defrosting process, controlling the second fan to be in an opening state.
Optionally, the second fan is disposed within a preset distance around the evaporator inlet and outlet pipe.
Optionally, the operating wind speed of the second fan is less than the operating wind speed of the first fan.
Optionally, the operating wind speed range of the second fan is 0.1m/s to 1 m/s.
The embodiment of the invention also provides a refrigerator dehumidification control device, which comprises:
the first control module is used for starting the compressor and controlling a first fan, a second fan and a compartment air door to be in a closed state after defrosting is stopped, wherein the first fan is positioned in the air duct, the second fan is positioned in the evaporation cavity, and the second fan is used for driving air in the evaporation cavity to blow to the evaporator in the open state;
the monitoring module is used for monitoring the surface temperature of the evaporator and the humidity in the evaporation cavity;
and the second control module is used for controlling the opening and closing of the second fan according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity.
The embodiment of the invention also provides an air-cooled refrigerator, which comprises: the embodiment of the invention relates to a dehumidification control device for a refrigerator.
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 refrigerator dehumidification control method according to an embodiment of the present invention.
Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement a method for controlling dehumidification of a refrigerator according to an embodiment of the present invention.
By applying the technical scheme of the invention, after defrosting is quitted, the compressor is started, the first fan, the second fan and the compartment air door are controlled to be in a closed state, and the second fan is controlled to be opened and closed according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity. When the second fan is opened, the high-temperature and high-humidity air in the driving evaporation cavity blows to the evaporator after cooling, so that the high-temperature and high-humidity air is cooled, condensed water is formed on the air on the evaporator pipeline and the fins and is discharged, the humidity in the evaporation cavity is reduced, normal refrigeration is carried out after dehumidification is completed, the frosting amount of the evaporator during normal refrigeration can be greatly reduced, the power consumption required by frosting is reduced, the refrigeration power consumption is reduced, and more energy and power are saved.
Drawings
Fig. 1 is a flowchart of a dehumidification control method for a refrigerator according to an embodiment of the present invention;
fig. 2 is a side sectional view of a refrigerator according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a position of a fan according to a second embodiment of the present invention;
fig. 4 is a schematic view of a second fan according to a second embodiment of the present invention;
FIG. 5 is a flow chart of defrosting and dehumidifying control for a refrigerator according to a second embodiment of the present invention;
fig. 6 is a block diagram illustrating a dehumidification control apparatus for a refrigerator according to a third 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.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Example one
The present embodiment provides a method for controlling dehumidification of a refrigerator, and fig. 1 is a flowchart of a method for controlling dehumidification of a refrigerator according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
s101, after defrosting is quitted, starting a compressor and controlling a first fan, a second fan and a compartment air door to be in a closed state, wherein the first fan is positioned in an air duct and used for providing driving force to send air in an evaporation cavity to each compartment of the refrigerator through the air duct; the second fan is located the evaporation intracavity, the second fan is used for driving the air in the evaporation intracavity to blow to the evaporimeter under the open mode, and the evaporation intracavity is the cavity that the evaporimeter was located.
S102, monitoring the surface temperature of the evaporator and the humidity in the evaporation cavity.
S103, controlling the second fan to be opened and closed according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity.
This embodiment changes the frost to the evaporimeter of refrigerator, can adopt electrical heating to change the frost or utilize room return air to change the frost, and at the defrosting in-process, the compressor is in the closure state, and the open and close state of first fan and room air door is different according to the difference of the mode of changing the frost, if adopt electrical heating to change the frost, then at the defrosting in-process, first fan and room air door are in the closure state, if utilize room return air to change the frost, then at the defrosting in-process, first fan and room air door are in the open mode.
After the defrosting is quitted, the compressor is started, the evaporator starts to refrigerate, the temperature of the evaporator starts to drop, and the first fan, the second fan and the compartment air door are controlled to be in a closed state, so that the cold energy produced by the evaporator cannot enter the compartment (such as a refrigerating chamber and a freezing chamber). Then according to the switching of the humidity control second fan of evaporimeter surface temperature and evaporation intracavity, in order to dehumidify the air of evaporation intracavity, it is concrete, when the second fan is opened, the second fan constantly blows the high temperature humid air of evaporation intracavity (by changing the frost and leading to) to the evaporimeter after the cooling, carry out the heat transfer with the evaporimeter pipeline, make high temperature humid air cooled down, the air condensation forms little drop on evaporimeter pipeline and fin, because the second fan lasts the air supply to the evaporimeter, blow the evaporator bottom water collector with the condensation water, avoided on the evaporimeter to accumulate more condensation water. When accomplishing the dehumidification, close the second fan, the refrigerator can begin normal refrigeration, that is to say, after defrosting and before normal refrigeration, carry out dehumidification to the highly humid air of evaporation intracavity, reduce evaporation intracavity moisture content for evaporimeter frost formation volume significantly reduced when normally refrigerating, thereby reduced because of the required consumption of frosting, more energy-conserving power saving.
According to the dehumidification control method of the refrigerator, after defrosting is withdrawn, the compressor is started, the first fan, the second fan and the compartment air door are controlled to be in a closed state, and the second fan is controlled to be opened and closed according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify air in the evaporation cavity. When the second fan is opened, the high-temperature and high-humidity air in the driving evaporation cavity blows to the evaporator after cooling, so that the high-temperature and high-humidity air is cooled, condensed water is formed on the air on the evaporator pipeline and the fins and is discharged, the humidity in the evaporation cavity is reduced, normal refrigeration is carried out after dehumidification is completed, the frosting amount of the evaporator during normal refrigeration can be greatly reduced, the power consumption required by frosting is reduced, the refrigeration power consumption is reduced, and more energy and power are saved.
In one embodiment, controlling the second fan to be turned on and off according to the surface temperature of the evaporator and the humidity in the evaporation cavity comprises: if the surface temperature of the evaporator is less than or equal to a preset temperature and the duration time reaches a first preset duration, judging whether the humidity in the evaporation cavity is greater than a preset humidity or not; if the humidity in the evaporation cavity is greater than the preset humidity, the second fan is started; and when the humidity in the evaporation cavity is less than or equal to the preset humidity, the second fan is closed.
The preset temperature can be set according to the temperature requirement for cooling the air in the evaporation cavity during dehumidification, the surface temperature of the evaporator is less than or equal to the preset temperature, and the surface temperature of the evaporator is reduced to a degree which is enough for dehumidifying the air in the evaporation cavity after defrosting is finished. If the surface temperature of the evaporator is less than or equal to the preset temperature, and the duration time for maintaining the temperature state of the evaporator reaches the first preset duration, the surface of the evaporator is indicated to be at low temperature and to be kept stable, at the moment, if the humidity in the evaporation cavity is greater than the preset humidity, the humidity in the evaporation cavity is indicated to be too high, the second fan is started, the second fan continuously blows high-temperature high-humidity air in the evaporation cavity to the evaporator, the high-temperature high-humidity air exchanges heat with the evaporator pipeline, the high-temperature high-humidity air is cooled down, condensation of the air on the evaporator pipeline and the fins forms small water drops, the second fan continuously blows the air to the evaporator, the condensation water is blown to the bottom tray of the evaporator, more condensation water accumulated on the evaporator is avoided, namely, the condensation water is cooled on the surface of the evaporator, the humidity in the evaporation cavity is reduced, and the dehumidification purpose is achieved. When the humidity in the evaporation cavity is smaller than or equal to the preset humidity, the humidity in the evaporation cavity can be accepted, the influence on subsequent normal refrigeration is small, the second fan is turned off at the moment, and the dehumidification process is completed.
This embodiment determines the degree that whether evaporimeter surface temperature drops enough to dehumidify the evaporation intracavity air through monitoring evaporimeter surface temperature, confirms whether to open the second fan through the humidity of monitoring evaporation intracavity and dehumidifies and whether close the second fan and stop the dehumidification, can accurately reliably dehumidify the evaporation intracavity air from this, provides the guarantee for reducing follow-up normal refrigerated consumption.
Further, if the electric heater is arranged below the evaporator, the dehumidification process can further include the following steps when the second fan is turned on: starting an electric heater and controlling the electric heater to operate according to preset power; correspondingly, when the second fan is turned off, the method can further comprise the following steps: turning off the electric heater. In the embodiment, the electric heater is started while the second fan is started to dehumidify air in the evaporation cavity by using the low-temperature evaporator, so that the condition that the temperature of the evaporator is reduced to below 0 ℃ to form frosting can be avoided. The preset power is lower power, and the electric heater is controlled to operate at lower power, so that the power consumption can be reduced.
In one embodiment, after dehumidifying the air in the evaporation chamber, the method further comprises: opening the first fan and the compartment air door to enable the refrigerator to carry out normal refrigeration; or, the compressor is closed, after the second preset time is waited, the compressor, the first fan and the compartment air door are opened, so that the refrigerator can refrigerate normally. Wherein, the second preset time period is the dripping time after the dehumidification is finished. After the dehumidification is completed, the second fan is turned off, that is, the second fan is turned off when the refrigerator is normally cooled. After the refrigerator is cooled for a period of time, according to a normal program of the refrigerator, when a defrosting condition is met (for example, the accumulated running time of the compressor reaches a preset time), the refrigerator enters a defrosting mode.
This embodiment can directly carry out normal refrigeration after accomplishing the dehumidification, also can close the compressor earlier in order to shut down, and it is long when predetermineeing through the second for the condensation water that produces fully leaves the evaporimeter among the dehumidification process, then start normal refrigeration again, further reduce the refrigeration frosting.
In the prior art, the electric heating defrosting is adopted, the defrosting efficiency is low, the defrosting time is long, the defrosting power consumption is high, heat generated by electric heating is diffused to a freezing chamber (an air door is not arranged), the temperature of the freezing chamber rises higher, and the refrigerating time is long after the freezing chamber recovers again.
In order to solve the above problem, in an embodiment, before the defrosting is exited, the method may further include: and in the defrosting process, controlling the second fan to be in an opening state. The operation of second fan can inhale and loose to the steam of evaporating chamber cavity department from electric heater, blows to the evaporimeter again, forms the hot-blast circulation like this at the evaporating chamber internal portion, lasts to the evaporimeter and changes frost to can promote the efficiency of changing frost, reduce the time of changing frost, reduce the consumption during the frost. Simultaneously because the second fan is opened, high temperature and high humidity air circulates in the evaporation cavity, forms air circulation in the evaporation cavity promptly, thereby avoids hot-air to get into the freezer through first fan entering wind channel in a large number, the problem of freezer temperature rise when having avoided defrosting.
In the defrosting process, the second fan is kept on, so that the defrosting speed is increased, the defrosting efficiency is improved, the defrosting time is shortened, and the defrosting power consumption is saved; meanwhile, air circulates in the evaporation cavity, so that the phenomenon that a large amount of hot air enters the air channel and then enters the compartment to cause compartment temperature rise is avoided.
Considering that the temperature difference of the evaporator inlet and outlet pipe is large in the refrigeration stage, the frosting is more, and residual ice is often left after the defrosting, therefore, in one embodiment, the second fan can be arranged in the preset distance around the evaporator inlet and outlet pipe, and the second fan is started during the defrosting, so that the inlet and outlet pipe with large defrosting amount can be quickly defrosted. Preferably, the second fan is arranged right above the inlet pipe and the outlet pipe of the evaporator.
In one embodiment, the operating air speed of the second fan is lower than that of the first fan, so that the condition that the temperature of the room is influenced when defrosting and dehumidifying due to overhigh air speed of the second fan is avoided. Preferably, the second fan is operated at a speed ranging from 0.1m/s to 1m/s, considering that the first fan is generally operated at a speed of about 1.5m/s in the refrigerator.
Example two
The embodiment provides a specific implementation manner of defrosting and dehumidifying for a refrigerator on the basis of the first embodiment. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
The method for controlling dehumidification of a refrigerator is described below with reference to a specific embodiment, but it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as limiting the present application.
Fig. 2 is a side sectional view of the refrigerator, fig. 3 is a schematic view of the position of a fan, and fig. 4 is a schematic view of a second fan, during refrigeration, return air from a refrigerating chamber enters the bottom of an evaporator 5 through a refrigerating return air duct 6, is refrigerated through the evaporator 5, rises to an evaporation cavity 4, is sucked into a freezing air supply duct 7 by a first fan 1, and then enters a freezing chamber to refrigerate the chamber. A cavity is arranged between the freezing fan cover and the refrigerator body and is called as an evaporation cavity. The evaporator is arranged in the evaporation cavity and is attached to the rear of the freezing fan cover and in front of the refrigerator body. The first fan 1 is arranged in the freezing fan cover and is used for absorbing the air in the evaporation cavity and sending the air to each compartment of the refrigerator. The outer surface of the freezing fan housing is respectively provided with a freezing chamber air outlet and a freezing chamber air return inlet, a freezing air supply duct 7 is arranged in the freezing fan housing, and the first fan 1 sucks air cooled by the evaporator 5 into the freezing air supply duct 7 and then enters the freezing chamber from the air outlet to refrigerate the freezing chamber; the cold air in the freezing chamber returns to the bottom of the evaporator 5 from the air return opening, is mixed with the air from the refrigerating chamber, is cooled again through the evaporator 5, is sucked into the air duct … … by the first fan 1 again to form an air circulation, and the cooling of the chamber is continuously performed. The second fan 2 is installed in the evaporation chamber 4 and is placed right above the evaporator inlet and outlet pipe 3.
The process shown in fig. 5 includes the following steps:
and S501, normally refrigerating the refrigerator.
And S502, judging whether the defrosting condition is met, for example, judging whether the accumulated running time of the compressor reaches the preset time, if so, entering S503, otherwise, returning to S501 to continue cooling.
S503, the refrigerator enters a defrosting mode, the electric heater is started, the compressor, the refrigeration air door and the first fan are all closed, and the second fan is started.
S504 determines whether the defrosting exit condition is satisfied, for example, whether the defrosting temperature detected by the defrosting sensor reaches a set temperature value, if yes, the process proceeds to S505, and if no, the process returns to S503 to continue defrosting.
And S505, the refrigerator exits the defrosting mode, the electric heater is closed, the cold storage air door, the first fan and the second fan are all closed, only the compressor is started, and the temperature of the evaporator begins to decrease.
S506, judging whether the evaporator temperature t is less than or equal to tIs provided withAnd the temperature duration T is more than or equal to TIs provided withIf so, the process proceeds to S507, otherwise, the process returns to S505 to continue to lower the evaporator temperature.
S507, judging whether the evaporation is satisfiedHumidity d > d in cavityIs provided withIf yes, the process proceeds to S508, and if no, the process returns to S501 to continue cooling.
And S508, the second fan is started, the electric heater is started at extremely low power, and the evaporation cavity is dehumidified and is ensured not to frost.
S509, judging whether the humidity d in the evaporation cavity is less than or equal to dIs provided withIf so, the dehumidification is completed, the step S501 is performed for normal cooling, and if not, the step S508 is performed to continue the dehumidification.
In the present embodiment, a temperature sensor and a humidity sensor are respectively disposed in the internal gap of the evaporator, the temperature sensor is used for detecting the surface temperature of the evaporator, the humidity sensor is used for detecting the humidity in the evaporation cavity, and the present embodiment further sets a temperature critical value tIs provided withCritical value of humidity dIs provided withAnd a time threshold value TIs provided with。
A second fan is arranged on the upper portion of the evaporation cavity and near the inlet and outlet pipe of the evaporator, the air speed of the second fan is 0.1-1 m/s, and the air speed of the first fan in the refrigerator is generally about 1.5m/s, so that the air speed of the second fan is set to be 0.1-1 m/s, and the situation that the air speed of the second fan is too high and the temperature of a room is affected during defrosting and dehumidifying is avoided.
And when the refrigeration is normal, the electric heater and the second fan are closed, and the first fan operates normally. After the refrigerator is cooled for a period of time, according to a normal program of the refrigerator, if the defrosting condition is met (if the accumulated running time of the compressor reaches the preset time), the refrigerator is controlled to enter an electric heating defrosting mode.
In the defrosting mode, the compressor is closed, the first fan and the refrigeration air door are closed, the electric heater is opened, the second fan is opened, at the moment, the second fan operates to suck hot air diffused to the cavity of the evaporation cavity from the electric heater and blow the hot air to the evaporator, so that hot air circulation is formed in the evaporation cavity, the evaporator is defrosted continuously, the defrosting speed can be increased, the defrosting time is shortened, the defrosting efficiency is improved, and the power consumption during defrosting is reduced; simultaneously because the second fan is opened, the high temperature and high humidity air circulates in the evaporation cavity, thereby avoiding hot air to enter the freezing chamber through the first fan entering air duct in a large number, and then avoiding the problem of freezing chamber temperature rise during defrosting.
When the defrosting exit condition is met, for example, when a defrosting sensor in the refrigerator detects that the defrosting temperature reaches a set value, the defrosting is exited, and specifically, the electric heater and the second fan are turned off. Before normal refrigeration, because the evaporation cavity is just in a defrosting completion state, the humidity is too large, and the evaporator can be quickly frosted during refrigeration, so that the problem of overlarge frosting amount is caused, therefore, after the evaporator is quitted from defrosting, the refrigerator is controlled not to immediately enter a normal refrigeration mode, but the high-humidity air in the evaporation cavity is subjected to dehumidification treatment before normal refrigeration. The dehumidification treatment specifically includes: and starting the compressor to refrigerate the evaporator, and closing the first fan, the second fan and the air door, wherein the cold energy produced by the evaporator cannot enter the refrigerating chamber and the freezing chamber. When the temperature sensor detects that the surface temperature of the evaporator is reduced to tIs provided with(i.e., t. ltoreq. tIs provided with) And last for TIs provided withTime (i.e. T ≧ T)Is provided with) Then, if the humidity sensor detects a humidity value d > d, it indicates that the evaporator surface is at a low temperature and stableIs provided withThe second fan is opened and the electric heater is opened with low power this moment, the second fan constantly blows the humid tropical air of evaporation intracavity to the evaporimeter, the hot-air carries out the heat transfer with the evaporimeter pipeline, humid tropical air is cooled off, the realization dehumidifies the air, open the electric heater with extremely low power simultaneously, avoid the evaporimeter temperature to fall to the formation below 0 ℃ frost, the air condensation forms the little drop of water on evaporimeter pipeline and fin this moment, and because the second fan lasts the air supply to the evaporimeter, blow the evaporimeter bottom water collector with the condensation water, it has more condensation water to have avoided the evaporimeter. During the dehumidification phase, when the humidity sensor detects that the humidity drops to dIs provided withAnd after the cold energy is obtained, the electric heater and the second fan are closed, the cold storage air door and the first fan are opened, the refrigerator enters a normal refrigeration mode, and the cold energy prepared by the evaporator can enter each compartment to refrigerate the compartment. Like this, the evaporimeter has passed through the dehumidification after defrosting and before the refrigeration, and evaporation chamber moisture content reduces for frosting volume greatly reduced during the refrigeration, thereby reduce the consumption in the period of frosting, more energy-conserving power saving.
The second fan is opened when the embodiment is defrosted, promotes the defrosting efficiency, reduces the defrosting time, saves the defrosting power consumption, and the room temperature rise of freezing room is little, resumes the reduction of refrigeration time again. After defrosting is finished, the compressor is started before refrigeration, the first fan and the air door are kept in a closed state, cold air is prevented from entering the compartment, the evaporator is rapidly cooled at the moment, and after the temperature is reduced to a low temperature and kept stable, the second fan is started, so that the air in the evaporation cavity circulates through the evaporator, is cooled and condensed on the surface of the pipeline of the evaporator, and the humidity in the evaporation cavity is reduced; after the humidity is reduced to a certain value, the power is cut off and the machine is shut down, condensed water leaves the evaporator after a period of dripping time, and then the machine is started for normal refrigeration, so that the frosting amount of the evaporator during refrigeration is reduced, and the refrigeration power consumption is reduced.
EXAMPLE III
Based on the same inventive concept, the embodiment provides a refrigerator dehumidification control device, which can be used for implementing the refrigerator dehumidification 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. 6 is a block diagram illustrating a dehumidifying control apparatus for a refrigerator according to a third embodiment of the present invention, and as shown in fig. 6, the apparatus includes:
the first control module 61 is used for starting the compressor and controlling a first fan, a second fan and a compartment air door to be in a closed state after defrosting is withdrawn, wherein the first fan is positioned in the air duct, the second fan is positioned in the evaporation cavity, and the second fan is used for driving air in the evaporation cavity to blow to the evaporator in the open state;
a monitoring module 62 for monitoring the evaporator surface temperature and the humidity in the evaporation cavity;
and the second control module 63 is used for controlling the opening and closing of the second fan according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity.
Optionally, the second control module 63 includes:
the judging unit is used for judging whether the humidity in the evaporation cavity is greater than the preset humidity or not if the surface temperature of the evaporator is less than or equal to the preset temperature and the duration time reaches a first preset duration;
the first control unit is used for starting the second fan if the humidity in the evaporation cavity is greater than the preset humidity;
and the second control unit is used for closing the second fan when the humidity in the evaporation cavity is less than or equal to the preset humidity.
Optionally, the first control unit is further configured to: when the second fan is started, starting an electric heater and controlling the electric heater to operate according to preset power, wherein the electric heater is positioned below the evaporator; correspondingly, the second control unit is further configured to: turning off the electric heater while turning off the second fan.
Optionally, the apparatus further comprises: the third control module is used for opening the first fan and the compartment air door after dehumidifying the air in the evaporation cavity so as to enable the refrigerator to carry out normal refrigeration; or, the compressor is closed, after the second preset time is waited, the compressor, the first fan and the compartment air door are opened, so that the refrigerator can refrigerate normally.
Optionally, the apparatus further comprises: and the fourth control module is used for controlling the second fan to be in an opening state in the defrosting process.
Optionally, the second fan is disposed within a preset distance around the evaporator inlet and outlet pipe.
Optionally, the operating wind speed of the second fan is less than the operating wind speed of the first fan.
Optionally, the operating wind speed range of the second fan is 0.1m/s to 1 m/s.
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.
Example four
The embodiment provides an air-cooled refrigerator, including: the dehumidification control device for the refrigerator in the third embodiment.
The air-cooled refrigerator may further include: the temperature sensor is positioned on the evaporator and used for detecting the surface temperature of the evaporator; and the humidity sensor is positioned in the evaporation cavity and used for detecting the humidity in the evaporation cavity. The temperature sensor and the humidity sensor can realize the function of the monitoring module 62 in the third embodiment.
EXAMPLE five
The present embodiment 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 refrigerator dehumidification control method according to the above embodiment.
EXAMPLE six
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the refrigerator dehumidification control method 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 (12)
1. A dehumidification control method for a refrigerator is characterized by comprising the following steps:
after defrosting is quitted, the compressor is started, and the first fan, the second fan and the compartment air door are controlled to be in a closed state, wherein the first fan is positioned in the air duct, the second fan is positioned in the evaporation cavity, and the second fan is used for driving air in the evaporation cavity to blow to the evaporator in the opening state;
monitoring the surface temperature of the evaporator and the humidity in the evaporation cavity;
and controlling the second fan to be opened and closed according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity.
2. The method of claim 1, wherein controlling the second fan to open and close according to the evaporator surface temperature and the humidity in the evaporation chamber comprises:
if the surface temperature of the evaporator is less than or equal to a preset temperature and the duration time reaches a first preset duration, judging whether the humidity in the evaporation cavity is greater than a preset humidity or not;
if the humidity in the evaporation cavity is greater than the preset humidity, the second fan is started;
and when the humidity in the evaporation cavity is less than or equal to the preset humidity, the second fan is closed.
3. The method of claim 2, further comprising, while turning on the second fan: starting an electric heater and controlling the electric heater to operate according to preset power, wherein the electric heater is positioned below the evaporator;
correspondingly, when the second fan is turned off, the method further comprises the following steps: turning off the electric heater.
4. The method of claim 1, further comprising, after dehumidifying the air within the evaporation chamber:
opening the first fan and the compartment air door to enable the refrigerator to carry out normal refrigeration; alternatively, the first and second electrodes may be,
and closing the compressor, and after waiting for a second preset time, opening the compressor, the first fan and the compartment air door so as to enable the refrigerator to carry out normal refrigeration.
5. The method of claim 1, further comprising, prior to exiting defrosting:
and in the defrosting process, controlling the second fan to be in an opening state.
6. The method of any one of claims 1 to 5, wherein the second fan is disposed within a predetermined distance around the evaporator access tube.
7. The method of any of claims 1 to 5, wherein the operating wind speed of the second wind turbine is less than the operating wind speed of the first wind turbine.
8. The method of claim 7, wherein the second fan operates at a wind speed in a range of 0.1m/s to 1 m/s.
9. A dehumidification control apparatus for a refrigerator, comprising:
the first control module is used for starting the compressor and controlling a first fan, a second fan and a compartment air door to be in a closed state after defrosting is stopped, wherein the first fan is positioned in the air duct, the second fan is positioned in the evaporation cavity, and the second fan is used for driving air in the evaporation cavity to blow to the evaporator in the open state;
the monitoring module is used for monitoring the surface temperature of the evaporator and the humidity in the evaporation cavity;
and the second control module is used for controlling the opening and closing of the second fan according to the surface temperature of the evaporator and the humidity in the evaporation cavity so as to dehumidify the air in the evaporation cavity.
10. An air-cooled refrigerator, comprising: the dehumidification control apparatus for a refrigerator as claimed in claim 9.
11. An electronic device, comprising: 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 are caused to implement the refrigerator dehumidification control method of any one of claims 1 to 8.
12. A computer-readable storage medium on which a computer program is stored, wherein the program, when executed by a processor, implements the refrigerator dehumidification control method of any one of claims 1 to 8.
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| CN202011296211.6A CN112460901B (en) | 2020-11-18 | 2020-11-18 | Refrigerator dehumidification control method and device and air-cooled refrigerator |
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