CN114383219B - Method and device for defrosting air conditioner and air conditioner - Google Patents
Method and device for defrosting air conditioner and air conditioner Download PDFInfo
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- CN114383219B CN114383219B CN202111610011.8A CN202111610011A CN114383219B CN 114383219 B CN114383219 B CN 114383219B CN 202111610011 A CN202111610011 A CN 202111610011A CN 114383219 B CN114383219 B CN 114383219B
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- heat exchanger
- 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 54
- 238000004140 cleaning Methods 0.000 claims abstract description 40
- 238000005485 electric heating Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000009825 accumulation Methods 0.000 claims abstract description 11
- 230000003749 cleanliness Effects 0.000 claims abstract description 6
- 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
- 238000003860 storage Methods 0.000 description 12
- 238000004891 communication Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- 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 a target fan rotating speed according to the cleanliness of the air conditioner under the condition of defrosting operation; starting an electric heating device and controlling the outdoor fan to rotate in the opposite direction of the target fan rotating speed so as to form a high Wen Fengdai between the outdoor fan and the outdoor heat exchanger; wherein the cleaning degree is related to the frosting degree of the outdoor heat exchanger and the water accumulation degree of the air conditioner. Through the formed high Wen Fengdai, not only can the quick defrosting be realized, but also the residual condensed water on the outdoor heat exchanger side and the chassis side can be removed while the quick defrosting is realized, the condition of accumulated icing is avoided, and the applicability of the defrosting method is improved. The application also discloses a device for defrosting the air conditioner and the air conditioner.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, and for example relates to a method and device for defrosting an air conditioner and the air conditioner.
Background
At present, when the air conditioner heats, under the condition that the outdoor environment temperature is too low, the outdoor opportunity of the air conditioner generates frosting phenomenon, the frosting of the outdoor heat exchanger can enable the heat exchange efficiency to be too low, and finally the air outlet temperature of the air conditioner is reduced, so that the user experience is poor. At this time, the air conditioner generally enters defrosting, so as to avoid the situation that the heat exchange effect is poor. However, the defrosting of the air conditioner often encounters the problem that the defrosting of the outdoor heat exchanger is not clean, so that the heat exchange efficiency of the outdoor heat exchanger is reduced, and the refrigerating effect is poor. Even though the defrosting mode is adopted to defrost the outdoor heat exchanger, the outdoor heat exchanger and the chassis can be subjected to residual condensed water, and after a plurality of defrosting operations, the residual condensed water can be accumulated continuously, so that excessive accumulated water is accumulated on the outdoor heat exchanger and the chassis, and the problem of accumulated icing is caused due to the fact that the water is not smoothly discharged in the air conditioner.
The prior art discloses a defrosting method of an air conditioner outdoor unit, which comprises the steps of entering a defrosting mode when a defrosting preset condition is met, and controlling a lower air outlet fan in a lower air outlet module of the air conditioner to reversely rotate so as to exhaust air outwards; the lower air outlet module of the air conditioner is communicated with the 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. When the original defrosting mode is executed, the lower air outlet module discharges indoor hot air outwards, and the hot air is discharged to the condenser through the ventilation pipeline, so that defrosting and deicing time is shortened, the use experience of a user is effectively improved, and the comfort level is improved.
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:
the defrosting is carried out by adopting the prior art, and indoor hot air is reversely rotated through the lower air outlet fan and blown to the outdoor heat exchanger through the ventilation pipeline, so that the problem of accumulated icing of the outdoor heat exchanger can be solved to a certain extent. However, the prior art can only defrost and remove water from the outdoor heat exchanger, so that the accumulated water in the chassis can not be taken into account, and the accumulated ice can still occur, so that the defrosting method has low applicability.
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, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
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, the problem of accumulated icing is avoided, and the applicability of the defrosting method is improved.
In some embodiments, the air conditioner comprises an outdoor fan with fan blades provided with built-in cavities, and the built-in cavities are provided with electric heating devices; the method comprises the following steps: under the condition of defrosting operation, determining a target fan rotating speed according to the cleaning degree of the air conditioner; starting an electric heating device and controlling the outdoor fan to rotate in the opposite direction of the target fan rotating speed so as to form a high Wen Fengdai between the outdoor fan and the outdoor heat exchanger; wherein the cleaning degree is related to the frosting degree of the outdoor heat exchanger and the water accumulation degree of the air conditioner.
In some embodiments, the apparatus comprises: the air conditioner defrosting control device comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the method for defrosting the air conditioner when executing the program instructions.
In some embodiments, the air conditioner includes: the outdoor heat exchanger and the fan blades are provided with an outdoor fan with built-in cavities, the leeward side of the outdoor heat exchanger is provided with a plurality of air quantity sensors which are uniformly distributed, and the built-in cavities are provided with electric heating devices; the device for defrosting the air conditioner is further included.
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:
in the case of defrosting operation, a target fan speed is determined according to the degree of cleanliness, the electric heating device is started and the outdoor fan is controlled to rotate in the opposite direction to the target fan speed, so that a height Wen Fengdai is formed between the outdoor fan and the outdoor heat exchanger. Because the cleaning degree is related to the frosting degree and the ponding degree, not only can the quick defrosting be realized through the formed height Wen Fengdai, but also the residual condensed water on the side of the outdoor heat exchanger and the side of the chassis can be removed while the quick defrosting is realized, the situation 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 and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic view of an overall structure of an air conditioner provided in an embodiment of the present disclosure;
fig. 2 is a schematic view of an outdoor fan section structure 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 provided by 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 view of an apparatus for defrosting an air conditioner provided in 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 sleeve; 7: measuring a bracket; 8: a second humidity sensor; 9: a first humidity sensor.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. 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 still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
In the embodiment of the disclosure, the intelligent home appliance refers to a home appliance formed after a microprocessor, a sensor technology and a network communication technology are introduced into the home appliance, and has the characteristics of intelligent control, intelligent sensing and intelligent application, the operation process of the intelligent home appliance often depends on the application and processing of modern technologies such as the internet of things, the internet and an electronic chip, for example, the intelligent home appliance can realize remote control and management of a user on the intelligent home appliance by connecting the electronic appliance.
In the disclosed embodiment, the terminal device refers to an electronic device with a wireless connection function, and the terminal device can be in communication connection with the intelligent household electrical appliance through connecting with the internet, or can be in communication connection with the intelligent household electrical appliance through Bluetooth, wifi and other modes. In some embodiments, the terminal device is, for example, a mobile device, a computer, or an in-vehicle device built into a hover vehicle, etc., or any combination thereof. The mobile device may include, for example, a cell phone, smart home device, wearable device, smart mobile device, virtual reality device, etc., or any combination thereof, wherein the wearable device includes, for example: smart watches, smart bracelets, pedometers, etc.
As shown in fig. 1 and 2, an embodiment of the present disclosure discloses an air conditioner including a motor bracket 1, a base plate, a compressor 4, a partition 5, an outdoor heat exchanger 3, and an outdoor fan 2 having a built-in cavity provided with a fan blade 201. The lee side of the outdoor heat exchanger 3 is provided with a plurality of air quantity sensors which are uniformly distributed, and the built-in cavity is provided with an electric heating device 202. The chassis 6 is provided with a first humidity sensor 9, and the outdoor heat exchanger 3 is provided with a second humidity sensor 8. The leeward side of the outdoor heat exchanger 3 is: the outdoor fan 2 rotates in a normal wind direction, namely, when the air is discharged outdoors under the action of the outdoor fan 2, the leeward side of the outdoor heat exchanger 3 is specifically the position between the outdoor fan 2 and the outdoor heat exchanger 3. The lee side of the outdoor heat exchanger 3 is provided with a measuring bracket 7, and a plurality of air quantity sensors are uniformly arranged on the measuring bracket 7. The electric heating device 202 may be a heating wire. The blade 201 is made of a heat-resistant and heat-conductive material, such as alumina, copper, ceramics, tungsten-copper alloy, or the like. A heat insulation shaft sleeve 203 is installed between the fan blades 201 and the motor shaft of the outdoor fan 2, and protects the motor shaft when the electric heating device 202 heats.
Based on the structure of the air conditioner:
as shown in conjunction with fig. 3, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
s31, under the condition that the air conditioner is in defrosting operation, determining the target fan rotating speed according to the cleaning degree of the air conditioner.
S32, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the opposite direction of the target fan speed so as to form a high Wen Fengdai between the outdoor fan and the outdoor heat exchanger.
Wherein the cleaning degree is related to the frosting degree of the outdoor heat exchanger and the water accumulation degree of the air conditioner. The ponding degree of the air conditioner can represent the ponding condition of the outdoor heat exchanger and the chassis.
By adopting the method for defrosting the air conditioner, which is provided by the embodiment of the disclosure, 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 reverse rotation of the outdoor fan to form a height Wen Fengdai between the outdoor fan and the outdoor heat exchanger. Since the degree of cleanliness is related to the degree of frosting and the degree of water accumulation, the target rotational speed is adapted to the water accumulation of the outdoor heat exchanger and the chassis at this time. The high Wen Fengdai formed by the method can not only realize quick defrosting by being matched with a conventional defrosting mode (namely refrigeration defrosting), but also remove residual condensed water on the outdoor heat exchanger side and the chassis side while quick defrosting, thereby avoiding the condition of accumulated icing and improving the applicability of the defrosting method. And no additional fans and ventilation pipelines are needed, so that the cost for solving the problem of accumulated icing is further reduced.
Optionally, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the opposite direction of the target fan rotation speed, including: the air conditioner controls the outdoor fan to stop rotating and starts the electric heating device; after the air conditioner passes the first time, the outdoor fan is controlled to rotate in the opposite direction of the target fan rotating speed.
Thus, the air conditioner controls the outdoor fan to stop rotating and starts the electric heating device, the temperature of the fan blades is increased, and the air in the area nearby the outdoor fan is heated. After the first time, the temperature of the fan blades rises to a certain degree, the outdoor fan is controlled to rotate in the opposite direction of the target fan rotating speed, a high Wen Fengdai 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 air conditioner determines the target fan rotation speed according to the cleaning degree of the air conditioner, including: the air conditioner determines a cleaning coefficient according to the current air quantity of the lee surface 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 rotating speed of the target fan according to the cleaning coefficient; wherein the cleaning factor is related to the degree of cleaning.
Wherein the cleaning factor is inversely related to the degree of cleaning. The higher the cleaning coefficient, the more serious the frosting condition of the outdoor heat exchanger, and the more accumulated water of the outdoor heat exchanger and the chassis.
Thus, because the outdoor fan rotates positively at this time and after the outdoor heat exchanger frosts, the flow area between the fins of the outdoor heat exchanger can be reduced, namely the air quantity flowing through the outdoor heat exchanger can be reduced, so that the current air quantity on the lee side of the outdoor heat exchanger can represent the frosting degree of the outdoor heat exchanger. The lower the current air volume, the higher the frosting degree of the outdoor heat exchanger. And the first relative humidity on the chassis side and the second relative humidity on the outdoor heat exchanger side can respectively represent the ponding degree of the chassis and the outdoor heat exchanger. The air conditioner determines the cleaning coefficient according to the current air quantity of the lee surface 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 ponding 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 water accumulation condition of the air conditioner according to the cleaning coefficient, so that quick and accurate defrosting is realized, and meanwhile, the situation that accumulated icing is caused by condensate water residues is avoided.
Optionally, the air conditioner determines the cleaning coefficient according to the current air volume of the lee 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 the method comprises the following steps: q' is less than or equal to Q-lambda of air conditioner i ΔQ, and a'. Gtoreq.a 0 +λ i Δa, and b'. Gtoreq.b 0 +λ i In case of Δb, λ i Determined as a cleaning coefficient lambda i =1+i/10, i being a non-negative integer.
Wherein the cleaning coefficient lambda i The cleaning degree is inversely related, Q is the standard air quantity of the lee surface of the outdoor heat exchanger, Q' is the current air quantity, deltaQ is the set air quantity fluctuation value, a 0 A' is the first relative humidity, deltaa is the first set fluctuation value, b 0 For the standard relative humidity on the side of the outdoor heat exchanger b' is the second relative humidity and Δb is the second set fluctuation value.
Thus, the air conditioner is at Q'. Ltoreq.Q-lambda. i ΔQ, and a'. Gtoreq.a 0 +λ i Δa, and b'. Gtoreq.b 0 +λ i In case of Δb, λ i Determined as a cleaning factor. Because the outdoor fan rotates positively at this time, and after the outdoor heat exchanger frosts, the flow area between the fins of the outdoor heat exchanger can be reduced, namely the air quantity flowing through the outdoor heat exchanger can be reduced, so that the outdoor heat exchanger can exchange heatThe current air volume on the lee side of the heater can characterize the frosting degree of the outdoor heat exchanger. The lower the current air volume, the higher the frosting degree of the outdoor heat exchanger. And the first relative humidity on the chassis side and the second relative humidity on the outdoor heat exchanger side can respectively represent the ponding degree of the chassis and the outdoor heat exchanger. The air conditioner determines the cleaning coefficient according to the current air quantity of the lee surface 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 ponding 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 quantity 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 average value of the detection values of the air quantity sensors can accurately reflect the air quantity of the leeward side of the outdoor heat exchanger, so that the current frosting degree of the outdoor heat exchanger can be accurately obtained.
Optionally, the air conditioner determines the target fan rotation speed according to the cleaning coefficient, including: air conditioner calculation r' =λ i r 0 。
Wherein r' is the target fan speed, r 0 And the initial rotating speed of the outdoor fan. The initial rotating speed is the rotating speed which is not regulated yet after the outdoor fan is controlled to rotate in the opposite direction. The initial rotational speed may be set manually or may be determined in other ways. For example, based on the rotational speed of the outdoor fan before reverse rotation, or based on the outdoor ambient temperature, etc.
Therefore, by adopting the formula, the cleaning coefficient capable of representing the frosting degree and the water accumulation degree of the air conditioner can enable the calculated target fan rotating speed to be adapted to the current frosting condition and water accumulation condition of the air conditioner, and the defrosting and water removal effects are improved.
As shown in conjunction with fig. 4, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
s31, under the condition that the air conditioner is in defrosting operation, determining the target fan rotating speed according to the cleaning degree of the air conditioner.
S32, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the opposite direction of the target fan speed so as to form a high Wen Fengdai between the outdoor fan and the outdoor heat exchanger.
S41, when the cleaning degree 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, the outdoor fan is controlled to operate for a second time according to the current state, and then the electric heating device is turned off.
S42, after the third time period passes, the air conditioner controls the outdoor fan to resume normal wind direction rotation and to exit defrosting operation.
The preset condition is that the current air quantity is larger than an air quantity 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, which is provided by the embodiment of the disclosure, when the cleanliness degree of the air conditioner meets the preset condition and the coil temperature of the outdoor heat exchanger is greater than or equal to the temperature threshold value, 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 also lower. At this time, after the air conditioner controls the outdoor fan to run for a second time according to the current state, the electric heating device is turned off, and the fan blades are cooled. And after the third time period, the temperature of the fan blade is recovered to be normal, and then the fan blade is controlled to recover to normal wind direction rotation of the outdoor fan and exit the defrosting operation, so that the defrosting operation is exited in time, and the energy is saved.
As shown in conjunction with fig. 5, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
s51, judging whether the air conditioner enters defrosting operation according to the frost point temperature and the coil temperature of the outdoor heat exchanger under the condition of heating operation.
S52, controlling the air conditioner to enter defrosting operation under the condition that the temperature of the coil pipe is less than or equal to the temperature of the frost point.
S31, under the condition that the air conditioner is in defrosting operation, determining the target fan rotating speed according to the cleaning degree of the air conditioner.
S32, the air conditioner starts the electric heating device and controls the outdoor fan to rotate in the opposite direction of the target fan speed so as to form a high Wen Fengdai between the outdoor fan and the outdoor heat exchanger.
By adopting the method for defrosting the air conditioner provided by the embodiment of the disclosure, the air conditioner judges whether to enter defrosting operation according to the temperature of the frost point and the temperature of the coil pipe of the outdoor heat exchanger under the condition of heating operation. And controlling to enter the 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 the 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 according to the frost point temperature and the coil temperature to defrost rapidly and remove accumulated water, defrosting efficiency is improved, and the problem of accumulated icing is avoided.
As shown in connection with fig. 6, an embodiment of the present disclosure provides an apparatus for defrosting an air conditioner, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise 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 the 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 air conditioner defrosting of the above-described embodiments.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, 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, i.e., 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, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, 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 with fan blades provided with built-in cavities, wherein a plurality of air volume sensors which are uniformly distributed are arranged on the leeward side of the outdoor heat exchanger, and the built-in cavities are provided with electric heating devices; the device for defrosting the air conditioner is further included.
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.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only 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. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (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, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will 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 depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts 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 that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (7)
1. A method for defrosting an air conditioner, characterized in that the air conditioner comprises an outdoor fan with built-in cavities provided with electric heating devices, wherein the fan blades are provided with built-in cavities; the method comprises the following steps:
under the condition of defrosting operation, determining a target fan rotating speed 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 of the target fan speed so as to form a height Wen Fengdai between the outdoor fan and the outdoor heat exchanger;
wherein the degree of cleanliness is related to the degree of frosting of the outdoor heat exchanger and the degree of water accumulation of the air conditioner;
the determining the target fan rotating speed according to the cleaning degree of the air conditioner comprises the following steps: determining a cleaning coefficient according to the current air quantity of the lee surface 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;
determining a cleaning factor based on a current air volume of the lee side of the outdoor heat exchanger, a first relative humidity of the chassis side, and a second relative humidity of the outdoor heat exchanger side, comprising: at Q'. Ltoreq.Q-lambda i ΔQ, and a'. Gtoreq.a 0 +λ i Δa, and b'. Gtoreq.b 0 +λ i In case of Δb, λ i Is determined as the cleaning systemNumber lambda i =1+i/10, i being a non-negative integer; wherein the cleaning coefficient lambda i The cleaning degree is inversely related, Q is the standard air quantity of the lee surface of the outdoor heat exchanger, Q' is the current air quantity, deltaQ is a set air quantity fluctuation value, a 0 A' is the first relative humidity, deltaa is a first set fluctuation value, b 0 B' is the second relative humidity, Δb is a second set fluctuation value;
the determining the target fan rotating speed according to the cleaning coefficient comprises the following steps: calculate r' =λ i r 0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein r' is the target fan speed, r 0 And the initial rotating speed of the outdoor fan.
2. The method of claim 1, wherein said activating said electric heating device and controlling said outdoor fan to rotate in a direction opposite to said target fan speed comprises:
controlling the outdoor fan to stop rotating and starting the electric heating device;
and after the first time period, controlling the outdoor fan to rotate in the opposite direction of the target fan rotating speed.
3. The method of claim 1, wherein the outdoor heat exchanger is provided with a plurality of air volume sensors evenly distributed on the leeward side; obtaining the current air quantity comprises the following steps:
acquiring detection values of all air quantity sensors in real time;
and calculating an average value of the detection values of the air volume sensors, and determining the average value as the current air volume.
4. A method according to any one of claims 1 to 3, wherein after said activating said electric heating device and controlling said outdoor fan to rotate in a direction opposite to said target fan speed, further comprising:
when the cleaning degree meets a preset condition and the coil temperature 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 closing the electric heating device;
and after the third time period, controlling the outdoor fan to recover normal wind direction rotation and quit the defrosting operation.
5. A method according to any one of claims 1 to 3, wherein before determining the target fan speed according to the cleanliness of the air conditioner in the defrosting operation, the method further comprises:
judging whether to enter the defrosting operation 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 the defrosting operation under the condition that the temperature of the coil pipe is less than or equal to the frost point temperature.
6. An apparatus for defrosting an air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for defrosting an air conditioner of any one of claims 1 to 5 when executing the program instructions.
7. The air conditioner is characterized by comprising an outdoor heat exchanger and an outdoor fan with built-in cavities arranged on fan blades, wherein a plurality of air quantity sensors which are uniformly distributed are arranged on the leeward side of the outdoor heat exchanger, and an electric heating device is arranged in the built-in cavities; further comprising an apparatus for defrosting an air conditioner as claimed in claim 6.
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