CN114383219A - Method and device for defrosting of air conditioner and air conditioner - Google Patents
Method and device for defrosting of air conditioner and air conditioner Download PDFInfo
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- CN114383219A CN114383219A CN202111610011.8A CN202111610011A CN114383219A CN 114383219 A CN114383219 A CN 114383219A CN 202111610011 A CN202111610011 A CN 202111610011A CN 114383219 A CN114383219 A CN 114383219A
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- heat exchanger
- air conditioner
- outdoor heat
- fan
- defrosting
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- 238000010257 thawing Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000004140 cleaning Methods 0.000 claims abstract description 38
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- 238000005485 electric heating Methods 0.000 claims abstract description 27
- 238000009825 accumulation Methods 0.000 claims abstract description 20
- 230000003749 cleanliness Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims 2
- 238000004891 communication Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
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- 238000005192 partition Methods 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/40—Damper positions, e.g. open or closed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/22—Cleaning ducts or apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for defrosting an air conditioner, which comprises the steps of determining the rotating speed of a target fan according to the cleaning degree of the air conditioner under the condition of defrosting operation; starting the electric heating device and controlling the outdoor fan to rotate in the opposite direction at the target fan rotating speed so as to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger; wherein the degree of cleanliness is associated with a degree of frosting of the outdoor heat exchanger and a degree of water accumulation of the air conditioner. Through the formed high-temperature wind band, the defrosting can be rapidly realized, the residual condensed water on the side of the outdoor heat exchanger and the side of the chassis can be removed while the defrosting is rapidly performed, the condition of accumulated icing is avoided, and the applicability of the defrosting method is improved. The application also discloses a device and air conditioner that are used for the air conditioner defrosting.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a method and a device for defrosting an air conditioner and the air conditioner.
Background
At present, when the air conditioner heats, under the condition that outdoor ambient temperature is too low, the phenomenon of frosting takes place for the outdoor chance of air conditioner, and outdoor heat exchanger frosting can make heat exchange efficiency too low, finally leads to air conditioner air-out temperature to reduce, and user experience worsens. At this moment, the air conditioner generally enters into the defrosting to this condition that avoids the heat transfer effect to worsen. However, the air conditioner defrosting often encounters the problem that the outdoor heat exchanger cannot defrost cleanly, so that the heat exchange efficiency of the outdoor heat exchanger is reduced, and the refrigeration effect is poor. Even if the defrosting mode is used for defrosting the outdoor heat exchanger, condensed water can be remained on the outdoor heat exchanger and the chassis, after defrosting operation for a plurality of times, the remained condensed water can be accumulated continuously, the excessive water accumulation of the outdoor heat exchanger and the chassis is caused, and the problem of accumulated icing is caused by the unsmooth drainage condition frequently occurring in the air conditioner.
The prior art discloses a defrosting method for an air conditioner outdoor unit, which comprises the steps of entering a defrosting mode when a preset defrosting condition is met, and controlling a lower air outlet fan in a lower air outlet module of an air conditioner to rotate reversely so as to exhaust air outwards; the air conditioner lower air outlet module is communicated with an air conditioner outdoor unit through a ventilation pipeline, and the end part of the ventilation pipeline is close to one side of the condenser or is opposite to the condenser. The indoor hot air is outwards discharged to air-out module when carrying out former defrosting mode, and the hot air discharges to condenser department via the ventilation pipeline to shorten the time of defrosting and deicing, effectively improve user's use and experience, promote the comfort level.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
adopt prior art to defrost, through air-out fan antiport down with indoor hot-air through ventilation pipe way with blow to outdoor heat exchanger, can solve the frozen problem of outdoor heat exchanger accumulation to a certain extent. However, in the prior art, the defrosting and the dewatering can only be performed on the outdoor heat exchanger, and the accumulated water on the chassis cannot be taken into consideration, so that the problem of accumulated icing still occurs, and the applicability of the defrosting method is low.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for defrosting an air conditioner and the air conditioner, so that residual condensed water on the side of an outdoor heat exchanger and the side of a chassis is removed while defrosting is performed, the problem of accumulated icing is avoided, and the applicability of the defrosting method is improved.
In some embodiments, the air conditioner includes an outdoor fan having a fan blade provided with a built-in cavity provided with an electric heating device; the method comprises the following steps: under the condition of defrosting operation, determining the rotating speed of a target fan according to the cleaning degree of the air conditioner; starting the electric heating device and controlling the outdoor fan to rotate in the opposite direction at the target fan rotating speed so as to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger; wherein the degree of cleanliness is associated with a degree of frosting of the outdoor heat exchanger and a degree of water accumulation of the air conditioner.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor configured to, when executing the program instructions, perform the method for defrosting an air conditioner described above.
In some embodiments, the air conditioner includes: the outdoor heat exchanger and the fan blades are provided with an outdoor fan with a built-in cavity, the leeward side of the outdoor heat exchanger is provided with a plurality of air volume sensors which are uniformly distributed, and the built-in cavity is provided with an electric heating device; the defrosting device for the air conditioner also comprises the defrosting device for the air conditioner.
The method and the device for defrosting the air conditioner and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
under the condition of defrosting operation, the target fan rotating speed is determined according to the cleaning degree, the electric heating device is started, and the outdoor fan is controlled to rotate in the opposite direction of the target fan rotating speed, so that a high-temperature air zone is formed between the outdoor fan and the outdoor heat exchanger. Because the cleaning degree is related to the frosting degree and the water accumulation degree, through the formed high-temperature air belt, the defrosting can be performed quickly, the residual condensed water on the outdoor heat exchanger side and the chassis side can be removed while the defrosting is performed quickly, the condition of accumulated icing is avoided, and the applicability of the defrosting method is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic view of the overall structure of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a structure of an outdoor fan portion of an air conditioner according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a method for defrosting an air conditioner according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an apparatus for defrosting an air conditioner according to an embodiment of the present disclosure.
Reference numerals:
1: a motor bracket; 2: an outdoor fan; 3: an outdoor heat exchanger; 4: a compressor; 5: a partition plate; 6: a chassis; 201: a fan blade; 202: an electric heating device; 203: a heat insulation shaft sleeve; 7: a measuring support; 8: a second humidity sensor; 9: a first humidity sensor.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
In the embodiment of the disclosure, the intelligent household appliance is a household appliance formed by introducing a microprocessor, a sensor technology and a network communication technology into the household appliance, and has the characteristics of intelligent control, intelligent sensing and intelligent application, the operation process of the intelligent household appliance usually depends on the application and processing of modern technologies such as internet of things, internet and an electronic chip, for example, the intelligent household appliance can realize the remote control and management of a user on the intelligent household appliance by connecting the intelligent household appliance with the electronic device.
In the disclosed embodiment, the terminal device is an electronic device with a wireless connection function, and the terminal device can be in communication connection with the above intelligent household appliance by connecting to the internet, or can be in communication connection with the above intelligent household appliance directly in a bluetooth mode, a wifi mode, or the like. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a vehicle-mounted device built in a floating car, or any combination thereof. The mobile device may include, for example, a cell phone, a smart home device, a wearable device, a smart mobile device, a virtual reality device, or the like, or any combination thereof, wherein the wearable device includes, for example: smart watches, smart bracelets, pedometers, and the like.
Referring to fig. 1 and 2, an embodiment of the present disclosure discloses an air conditioner, which includes a motor bracket 1, a bottom plate, a compressor 4, a partition plate 5, an outdoor heat exchanger 3, and an outdoor fan 2 having a built-in cavity and provided with fan blades 201. A plurality of air volume sensors which are uniformly distributed are arranged on the lee side of the outdoor heat exchanger 3, and an electric heating device 202 is arranged in the built-in cavity. A first humidity sensor 9 is arranged on the chassis 6, and a second humidity sensor 8 is arranged on the outdoor heat exchanger 3. Wherein, the leeward side of the outdoor heat exchanger 3 means: the outdoor fan 2 rotates in a normal wind direction, that is, when the gas is discharged to the outside under the action of the outdoor fan 2, the leeward side of the outdoor heat exchanger 3, specifically, the position between the outdoor fan 2 and the outdoor heat exchanger 3. The leeward side of the outdoor heat exchanger 3 is provided with a measuring bracket 7, and the plurality of air volume sensors are uniformly arranged on the measuring bracket 7. The electric heating device 202 may be a heating wire. The fan blade 201 is made of a heat-resistant material having a high thermal conductivity, such as alumina, copper, ceramic, tungsten-copper alloy, or the like. A heat insulation shaft sleeve 203 is installed between the fan blade 201 and the motor shaft of the outdoor fan 2, and the motor shaft is protected when the electric heating device 202 heats.
Based on above-mentioned air conditioner structure:
referring to fig. 3, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
and S31, determining the target fan rotating speed according to the cleaning degree of the air conditioner under the condition that the air conditioner is in defrosting operation.
And S32, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the reverse direction at the target fan speed to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger.
Wherein the degree of cleanliness is associated with a degree of frosting of the outdoor heat exchanger and a degree of water accumulation of the air conditioner. The water accumulation degree of the air conditioner can represent the water accumulation conditions of the outdoor heat exchanger and the chassis.
By adopting the method for defrosting the air conditioner, under the condition of defrosting operation, the target fan rotating speed is determined according to the cleaning degree, the electric heating device is started, and the outdoor fan is controlled to rotate in the opposite direction of the target fan rotating speed. The electric heating device heats the air blown to the outdoor heat exchanger by the outdoor fan in the reverse rotation direction so as to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger. Since the degree of cleanliness is correlated with the degree of frost formation and the degree of water accumulation, the target rotation speed is adapted to the water accumulation condition of the outdoor heat exchanger and the chassis at that time. The high-temperature air belt formed by the method can be matched with a conventional defrosting mode (namely refrigeration and defrosting) to realize quick defrosting, and can remove residual condensate water on the outdoor heat exchanger side and the chassis side while quickly defrosting, so that the condition of accumulated icing is avoided, and the applicability of the defrosting method is improved. And need not set up extra fan and ventilation pipeline, further reduced the cost of solving the accumulative icing problem.
Optionally, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in a reverse direction at the target fan speed, and the method includes: the air conditioner controls the outdoor fan to stop rotating and starts the electric heating device; after the first time period, the air conditioner controls the outdoor fan to rotate in the reverse direction at the target fan rotating speed.
Thus, the air conditioner controls the outdoor fan to stop rotating and start the electric heating device, the temperature of the fan blade will rise, and the air in the area near the outdoor fan will be heated. After the first time period, the temperature of the fan blades rises to a certain degree, the outdoor fan is controlled to rotate in the reverse direction at the target fan rotating speed, a high-temperature air zone can be formed between the outdoor fan and the outdoor heat exchanger, the outdoor heat exchanger is quickly defrosted, and condensed water accumulated on the outdoor heat exchanger and the chassis is removed.
Optionally, the determining, by the air conditioner, the target fan speed according to the degree of cleanliness of the air conditioner includes: the air conditioner determines a cleaning coefficient according to the current air volume of the leeward side of the outdoor heat exchanger, the first relative humidity of the chassis side and the second relative humidity of the outdoor heat exchanger side; the air conditioner determines the target fan rotating speed according to the cleaning coefficient; wherein the cleaning factor is associated with a degree of cleaning.
Wherein the cleaning coefficient is inversely related to the degree of cleaning. The higher the cleaning coefficient is, the more serious the frosting condition of the outdoor heat exchanger is, and the more accumulated water of the outdoor heat exchanger and the chassis is.
Like this, because outdoor fan is the forward rotation this moment to after outdoor heat exchanger frosts, the through-flow area between the outdoor heat exchanger fin can reduce, and the amount of wind that flows through outdoor heat exchanger promptly can reduce, therefore the current amount of wind of outdoor heat exchanger lee side can characterize outdoor heat exchanger's frosting degree. The lower the current air quantity is, the higher the frosting degree of the outdoor heat exchanger is. And the first relative humidity at the chassis side and the second relative humidity at the outdoor heat exchanger side can respectively represent the water accumulation degree of the chassis and the outdoor heat exchanger. The air conditioner determines a cleaning coefficient according to the current air quantity of the leeward side of the outdoor heat exchanger, the first relative humidity of the chassis side and the second relative humidity of the outdoor heat exchanger side, and can accurately judge the frosting condition of the current outdoor heat exchanger and the water accumulation condition of the outdoor heat exchanger and the chassis. Therefore, the air conditioner determines the target fan rotating speed matched with the current frosting condition and the water accumulation condition of the air conditioner according to the cleaning coefficient, so that quick and accurate defrosting is realized, and meanwhile, the condition that accumulated icing is caused by condensate water residue is avoided.
Optionally, the determining, by the air conditioner, a cleaning coefficient according to a current air volume of a leeward side of the outdoor heat exchanger, a first relative humidity at the chassis side, and a second relative humidity at the outdoor heat exchanger side includes: the air conditioner is under Q' < Q-lambda >iΔ Q, and a' is ≧ a0+λiΔ a, and b' is ≧ b0+λiIn the case of Δ b, λ will beiDetermined as the cleaning factor, λiI is a non-negative integer 1+ i/10.
Wherein the cleaning coefficient lambdaiIs inversely related to the cleaning degree, Q is the standard air quantity of the leeward side of the outdoor heat exchanger, Q' is the current air quantity, Delta Q is the set air quantity fluctuation value, a0As a standard on the chassis sideRelative humidity, a' is a first relative humidity, Δ a is a first set fluctuation value, b0Is the standard relative humidity on the outdoor heat exchanger side, b' is the second relative humidity, and Δ b is the second set fluctuation value.
Thus, the air conditioner is in Q' ≦ Q- λiΔ Q, and a' is ≧ a0+λiΔ a, and b' is ≧ b0+λiIn the case of Δ b, λ will beiThe cleaning factor is determined. Because outdoor fan is the forward rotation this moment to after outdoor heat exchanger frosts, the through-flow area between the outdoor heat exchanger fin can reduce, and the amount of wind that flows through outdoor heat exchanger promptly can reduce, therefore the current amount of wind of outdoor heat exchanger lee side can characterize outdoor heat exchanger's frosting degree. The lower the current air quantity is, the higher the frosting degree of the outdoor heat exchanger is. And the first relative humidity at the chassis side and the second relative humidity at the outdoor heat exchanger side can respectively represent the water accumulation degree of the chassis and the outdoor heat exchanger. The air conditioner determines a cleaning coefficient according to the current air quantity of the leeward side of the outdoor heat exchanger, the first relative humidity of the chassis side and the second relative humidity of the outdoor heat exchanger side, and can accurately judge the frosting condition of the current outdoor heat exchanger and the water accumulation condition of the outdoor heat exchanger and the chassis.
Optionally, the air conditioner obtains the current air volume, including: the air conditioner acquires the detection value of each air volume sensor in real time; the air conditioner calculates the average value of the detection values of the air volume sensors, and determines the average value as the current air volume.
Therefore, the air quantity sensors are uniformly arranged on the measurement support on the leeward side of the outdoor heat exchanger, so that the average value of the detection values of the air quantity sensors can accurately reflect the air quantity on the leeward side of the outdoor heat exchanger, and the current frosting degree of the outdoor heat exchanger is accurately obtained.
Optionally, the determining, by the air conditioner, the target fan speed according to the cleaning coefficient includes: air conditioner calculates r ═ lambdai r0。
Wherein r' is the target fan speed, r0The initial rotating speed of the outdoor fan. The initial rotation speed is the rotation which is not adjusted after the outdoor fan is controlled to rotate in the reverse directionAnd (4) speed. The initial rotation speed may be set manually or may be determined in other ways. For example, according to the rotation speed of the outdoor fan before the outdoor fan rotates in the reverse direction, or according to the outdoor ambient temperature, etc.
Therefore, by adopting the formula, the calculated target fan rotating speed can be adapted to the current frosting condition and water accumulation condition of the air conditioner through the cleaning coefficient capable of representing the frosting degree and water accumulation degree of the air conditioner, and the defrosting and dewatering effects are improved.
Referring to fig. 4, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
and S31, determining the target fan rotating speed according to the cleaning degree of the air conditioner under the condition that the air conditioner is in defrosting operation.
And S32, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the reverse direction at the target fan speed to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger.
And S41, controlling the outdoor fan to operate for a second time according to the current state and then turning off the electric heating device when the cleaning degree of the air conditioner meets the preset condition and the temperature of the coil of the outdoor heat exchanger is greater than or equal to the temperature threshold value.
And S42, after the air conditioner has passed the third time, controlling the outdoor fan to return to normal wind direction to rotate and quit defrosting operation.
The preset conditions are that the current air volume is larger than an air volume threshold value, the first relative humidity is smaller than a first threshold value, and the second relative humidity is smaller than a second threshold value.
By adopting the method for defrosting the air conditioner, the cleaning degree of the air conditioner meets the preset condition, and the temperature of the coil pipe of the outdoor heat exchanger is greater than or equal to the temperature threshold value, which indicates that the frosting degree of the outdoor heat exchanger is lower, and the water accumulation degree of the outdoor heat exchanger and the water accumulation degree of the chassis are lower. At the moment, after the air conditioner controls the outdoor fan to operate for the second time according to the current state, the electric heating device is closed, and the fan blades are cooled. And after the third time, after the temperature of the fan blades is recovered to be normal, the outdoor fan is controlled to recover the normal wind direction to rotate and quit the defrosting operation, and the defrosting operation is quitted in time, so that the energy is saved.
Referring to fig. 5, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
and S51, judging whether to enter defrosting operation according to the frost point temperature and the coil temperature of the outdoor heat exchanger when the air conditioner is in heating operation.
And S52, the air conditioner controls to enter defrosting operation when the temperature of the coil is less than or equal to the frost point temperature.
And S31, determining the target fan rotating speed according to the cleaning degree of the air conditioner under the condition that the air conditioner is in defrosting operation.
And S32, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the reverse direction at the target fan speed to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger.
By adopting the defrosting method for the air conditioner, the air conditioner judges whether to enter defrosting operation or not according to the frost point temperature and the coil temperature of the outdoor heat exchanger under the condition of heating operation. And controlling to enter defrosting operation under the condition that the temperature of the coil pipe of the outdoor heat exchanger is less than or equal to the frost point temperature, and not entering defrosting operation under the condition that the temperature of the coil pipe of the outdoor heat exchanger is greater than the frost point temperature. Therefore, the air conditioner can be timely controlled to enter a defrosting mode to quickly defrost and remove accumulated water according to the frost point temperature and the coil temperature, defrosting efficiency is improved, and the problem of accumulated icing is solved.
As shown in fig. 6, an embodiment of the present disclosure provides an apparatus for defrosting an air conditioner, which includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for defrosting an air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the method for defrosting an air conditioner in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises an outdoor heat exchanger and an outdoor fan, wherein a fan blade of the outdoor fan is provided with a built-in cavity, the leeward side of the outdoor heat exchanger is provided with a plurality of air volume sensors which are uniformly distributed, and the built-in cavity is provided with an electric heating device; the defrosting device for the air conditioner also comprises the defrosting device for the air conditioner.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for defrosting an air conditioner.
The storage medium may be a transitory storage medium or a non-transitory storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. 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 units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. The method for defrosting the air conditioner is characterized in that the air conditioner comprises an outdoor fan with a built-in cavity arranged on a fan blade, and the built-in cavity is provided with an electric heating device; the method comprises the following steps:
under the condition of defrosting operation, determining the rotating speed of a target fan according to the cleaning degree of the air conditioner;
starting the electric heating device and controlling the outdoor fan to rotate in the opposite direction at the target fan rotating speed so as to form a high-temperature air zone between the outdoor fan and the outdoor heat exchanger;
wherein the degree of cleanliness is associated with a degree of frosting of the outdoor heat exchanger and a degree of water accumulation of the air conditioner.
2. The method of claim 1, wherein said activating the electric heating device and controlling the outdoor fan to counter-rotate at the target fan speed comprises:
controlling the outdoor fan to stop rotating and starting the electric heating device;
and after the first time length, controlling the outdoor fan to rotate in the opposite direction at the target fan rotating speed.
3. The method of claim 1, wherein determining a target fan speed based on a cleanliness level of the air conditioner comprises:
determining a cleaning coefficient according to the current air volume of the leeward side of the outdoor heat exchanger, the first relative humidity of the chassis side and the second relative humidity of the outdoor heat exchanger side;
determining the target fan rotating speed according to the cleaning coefficient;
wherein the cleaning factor is associated with the degree of cleaning.
4. The method of claim 3, wherein determining a cleaning factor based on a current air volume on a leeward side of the outdoor heat exchanger, a first relative humidity on a chassis side, and a second relative humidity on the outdoor heat exchanger side comprises:
q' is less than or equal to Q-lambdaiΔ Q, and a' is ≧ a0+λiΔ a, and b' is ≧ b0+λiIn the case of Δ b, λ will beiIs determined as the cleaning factor, λi1+ i/10, i is a non-negative integer;
wherein the cleaning coefficient λiIs inversely related to the cleaning degree, Q is the standard air quantity of the leeward side of the outdoor heat exchanger, Q' is the current air quantity, Delta Q is the set air quantity fluctuation value, a0Is the standard relative humidity of the chassis side, a' is the first relative humidity, Δ a is the first set fluctuation value, b0Is the standard relative humidity on the outdoor heat exchanger side, b' is the second relative humidity, and Δ b is the second set fluctuation value.
5. The method according to claim 3, wherein a plurality of air quantity sensors are uniformly distributed on the leeward side of the outdoor heat exchanger; obtaining the current air volume, including:
acquiring the detection value of each air volume sensor in real time;
and calculating the average value of the detection values of the air volume sensors, and determining the average value as the current air volume.
6. The method of claim 3, wherein determining the target fan speed based on the cleaning factor comprises:
calculating r ═ λir0；
Wherein r' is the target fan speed, r0The initial rotating speed of the outdoor fan.
7. The method of any one of claims 1 to 6, wherein after activating the electric heating device and controlling the outdoor fan to rotate in a reverse direction at the target fan speed, further comprising:
under the condition that the cleaning degree meets a preset condition and the temperature of a coil of the outdoor heat exchanger is greater than or equal to a temperature threshold value, controlling the outdoor fan to operate for a second time period according to the current state, and then turning off the electric heating device;
and after the third time, controlling the outdoor fan to restore the normal wind direction to rotate and quit the defrosting operation.
8. The method according to any one of claims 1 to 6, wherein before determining a target fan speed according to a degree of cleanliness of the air conditioner in the case of the defrosting operation, further comprising:
under the condition of heating operation, judging whether to enter defrosting operation or not according to the frost point temperature and the coil temperature of the outdoor heat exchanger;
controlling entry into the defrost operation in the event the coil temperature is less than or equal to the frost point temperature.
9. An apparatus for defrosting an air conditioner comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to perform the method for defrosting an air conditioner of any one of claims 1 to 8 when executing the program instructions.
10. The air conditioner is characterized by comprising an outdoor heat exchanger and an outdoor fan, wherein a fan blade of the outdoor fan is provided with a built-in cavity, the leeward side of the outdoor heat exchanger is provided with a plurality of uniformly distributed air volume sensors, and the built-in cavity is provided with an electric heating device; further comprising an apparatus for defrosting an air conditioner according to claim 9.
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