CN114061033B - Method and device for defrosting air conditioner, air conditioner and storage medium - Google Patents
Method and device for defrosting air conditioner, air conditioner and storage medium Download PDFInfo
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- CN114061033B CN114061033B CN202111294451.7A CN202111294451A CN114061033B CN 114061033 B CN114061033 B CN 114061033B CN 202111294451 A CN202111294451 A CN 202111294451A CN 114061033 B CN114061033 B CN 114061033B
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- air conditioner
- outdoor
- defrosting
- outdoor fan
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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
- F24F11/62—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
- F24F11/70—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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application relates to the technical field of air conditioners, and discloses a method for defrosting an air conditioner, which comprises the following steps: detecting an outdoor ambient temperature in case that the air conditioner is operated in a cooling mode; detecting the temperature of an outer coil pipe of the outdoor heat exchanger; and controlling the operation of the outdoor fan under the condition that the temperature of the outer coil pipe is smaller than the outdoor environment temperature. When the outdoor unit of the air conditioner is defrosted, the air conditioner operates in a refrigerating mode, and a refrigerant flows through the outdoor heat exchanger for defrosting. And in the defrosting process, when the temperature of the outer coil pipe of the outdoor heat exchanger is smaller than the outdoor environment temperature, controlling the operation of the outdoor fan. Because the temperature of the outer coil pipe is smaller than the outdoor environment temperature, the temperature of the air sucked by the outdoor fan can be increased to assist defrosting when the air flows through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit is improved. The application also discloses a device for defrosting the air conditioner, the air conditioner and a storage medium.
Description
Technical Field
The present application relates to the technical field of air conditioners, and for example, to a method and apparatus for defrosting an air conditioner, and a storage medium.
Background
At present, when the ambient temperature is relatively low in winter, the heat exchanger of the outdoor unit of the air conditioner is easy to frost during operation. When the heat exchanger frosts, the heating capacity of the air conditioner is reduced, and the air conditioner needs to be recovered through defrosting. The heat exchanger needs longer time when defrosting, leads to indoor temperature fluctuation big, influences user's normal use.
The defrosting control method of the outdoor unit in the prior art comprises the following steps: detecting a defrosting start signal of the air conditioner outdoor unit; closing a compressor of the air conditioner and maintaining the fan of the outdoor unit of the air conditioner to rotate; after the compressor is closed for a first preset time, controlling the refrigerant flow direction switching device of the air conditioner to change direction, so that an outdoor heat exchanger of the air conditioner is connected to an outlet of the compressor; after the refrigerant flow direction switching device commutates for a second preset time, the fan is turned off; and after the fan is closed for setting a third preset time, starting the compressor at a first set frequency, so that the outdoor heat exchanger is started to heat and melt the attached frost.
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:
in the early defrosting process, the temperature of the refrigerant flowing through the outdoor heat exchanger is low, and long time is needed for defrosting by heating the refrigerant through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit 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, 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 device for defrosting an air conditioner, the air conditioner and a storage medium, so as to improve the defrosting speed of an outdoor unit.
In some embodiments, the method comprises: detecting an outdoor ambient temperature in case that the air conditioner is operated in a cooling mode; detecting the temperature of an outer coil pipe of the outdoor heat exchanger; and controlling the operation of the outdoor fan under the condition that the temperature of the outer coil pipe is smaller than the outdoor environment temperature. Controlling the operation of the outdoor fan, comprising: detecting the exhaust temperature of the compressor; and controlling the operation of the outdoor fan according to the exhaust temperature of the compressor. According to the exhaust temperature of the compressor, controlling the operation of the outdoor fan, comprising: opening the outdoor fan under the condition that the exhaust temperature of the compressor is smaller than a temperature set threshold value; and when the discharge temperature of the compressor is greater than or equal to the temperature set threshold, the outdoor fan is turned off. The value range of the temperature setting threshold is 20, 30 deg.C.
Optionally, after the outdoor fan is turned on, the method further comprises: determining a target rotating speed of the outdoor fan according to the temperature of the outer coil; and adjusting the rotating speed of the outdoor fan to the target rotating speed.
Alternatively, the lower the outer coil temperature, the greater the target speed of the outdoor fan.
Optionally, the lower the outer coil temperature, the greater the target rotational speed of the outdoor fan, including: n (N) t ＝(0-T c ) X 100; when N is t ＜0.1N n When N t ＝0.1N n The method comprises the steps of carrying out a first treatment on the surface of the When N is t ＞0.5N n When N t ＝0.5N n The method comprises the steps of carrying out a first treatment on the surface of the Wherein N is t Is the target rotating speed of the outdoor fan, T c At the outer coil temperature of N n Is the rated rotating speed of the outdoor fan.
Optionally, before detecting the outdoor environment temperature, in the case that the air conditioner is operated in the cooling mode, the method further includes: and when the air conditioner is in the defrosting mode, controlling the air conditioner to operate in the refrigerating mode.
In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to perform the above-described method for defrosting an air conditioner when the program instructions are executed.
In some embodiments, the air conditioner comprises the device for defrosting the air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for defrosting an air conditioner described above.
The method, the device, the air conditioner and the storage medium for defrosting the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
when the outdoor unit of the air conditioner is defrosted, the air conditioner operates in a refrigerating mode, and a refrigerant flows through the outdoor heat exchanger for defrosting. And in the defrosting process, when the temperature of the outer coil pipe of the outdoor heat exchanger is smaller than the outdoor environment temperature, controlling the operation of the outdoor fan. Because the temperature of the outer coil pipe is smaller than the outdoor environment temperature, the temperature of the air sucked by the outdoor fan can be increased to assist defrosting when the air flows through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit 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 structural view of an air conditioner according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of electrical connections of an air conditioner provided in 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 diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the disclosure;
FIG. 8 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
fig. 11 is a schematic view of an apparatus for defrosting an air conditioner according to an embodiment of the present disclosure.
Reference numerals:
1: an air conditioner; 11: a compressor; 12: a four-way valve; 13: an outdoor heat exchanger; 14: a throttle element; 15: an electronic expansion valve; 16: an indoor heat exchanger; 17: an outdoor fan; 18: an indoor fan; 19: an outer coil; 20: a first temperature sensor; 21: a second temperature sensor; 22: a third temperature sensor; 41: a processor; 42: a memory; 43: a communication interface; 44: a bus.
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.
In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.
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.
As shown in fig. 1 and 2 in combination, the air conditioner 1 includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a throttle element 14, an electronic expansion valve 15, an indoor heat exchanger 16, an outdoor fan 17, an indoor fan 18, and an outer coil 19. The compressor 11, the four-way valve 12, the outdoor heat exchanger 13, the throttling element 14, the electronic expansion valve 15 and the indoor heat exchanger 16 are sequentially connected in series to form a loop. The outer coil 19 is provided to the outdoor heat exchanger 13.
Optionally, the air conditioner 1 further comprises a first temperature sensor 20, a second temperature sensor 21, a third temperature sensor 22 and a processor 41. The first temperature sensor 20 is provided to the outer coil 19 and detects the temperature of the outer coil 19. The second temperature sensor 21 is provided in the outdoor unit of the air conditioner 1, and detects the outdoor ambient temperature. The third temperature sensor 22 is provided in the outdoor unit of the air conditioner 1, and detects the discharge temperature of the compressor 11. The processor 41 is electrically connected to the compressor 11, the four-way valve 12, the electronic expansion valve 15, the outdoor fan 17, the indoor fan 18, the first temperature sensor 20, the second temperature sensor 21, and the third temperature sensor 22, respectively, and is configured to control the four-way valve 12 to be powered off/on, control the operation of the outdoor fan 17 and the indoor fan 18, and adjust the operation frequency of the compressor 11 and the opening degree of the electronic expansion valve 15 according to the outdoor environment temperature, the temperature of the outer coil 19, and the exhaust temperature of the compressor 11.
As shown in conjunction with fig. 3, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
s220, in case the air conditioner is operated in the cooling mode, the second temperature sensor detects an outdoor ambient temperature.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
And S260, controlling the operation of the outdoor fan by the processor under the condition that the temperature of the outer coil pipe is smaller than the outdoor environment temperature.
By adopting the method for defrosting the air conditioner provided by the embodiment of the disclosure, when the outdoor unit of the air conditioner is defrosted, the air conditioner operates in a refrigeration mode, and the refrigerant flows through the outdoor heat exchanger for defrosting. And in the defrosting process, when the temperature of the outer coil pipe of the outdoor heat exchanger is smaller than the outdoor environment temperature, controlling the operation of the outdoor fan. Because the temperature of the outer coil pipe is smaller than the outdoor environment temperature, the temperature of the air sucked by the outdoor fan can be increased to assist defrosting when the air flows through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit is improved.
As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s220, in case the air conditioner is operated in the cooling mode, the second temperature sensor detects an outdoor ambient temperature.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
S261, when the outer coil temperature is less than the outdoor environment temperature, the third temperature sensor detects the discharge temperature of the compressor.
S262, the processor controls the operation of the outdoor fan according to the exhaust temperature of the compressor.
Thus, the operation of the outdoor fan is controlled according to the exhaust temperature of the compressor, and the influence of the outdoor fan on the defrosting process can be reduced.
As shown in conjunction with fig. 5, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s220, in case the air conditioner is operated in the cooling mode, the second temperature sensor detects an outdoor ambient temperature.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
S261, when the outer coil temperature is less than the outdoor environment temperature, the third temperature sensor detects the discharge temperature of the compressor.
S263, the processor determines whether the discharge temperature of the compressor is less than a temperature set threshold. If yes, go to step S264. If not, go to step S265.
S264, the processor turns on the outdoor fan.
S265, the processor turns off the outdoor fan.
Therefore, when the exhaust temperature of the compressor is higher, the condition that the outdoor fan discharges hot air generated by the compressor out of the outdoor unit can be reduced, so that the defrosting efficiency is not affected.
The magnitude of the temperature setting threshold influences the opening time of the outdoor fan, and further influences the defrosting speed of the outdoor unit. The temperature setting threshold is set to a value in the range of [20, 30], preferably 22 ℃, 25 ℃ or 27 ℃.
As shown in connection with fig. 6, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s220, in case the air conditioner is operated in the cooling mode, the second temperature sensor detects an outdoor ambient temperature.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
S261, when the outer coil temperature is less than the outdoor environment temperature, the third temperature sensor detects the discharge temperature of the compressor.
S264, when the discharge temperature of the compressor is less than the temperature set threshold, the processor turns on the outdoor fan.
And S266, the processor determines the target rotating speed of the outdoor fan according to the temperature of the outer coil pipe.
And S268, the processor adjusts the rotating speed of the outdoor fan to the target rotating speed.
Thus, the speed of air passing through the heat exchanger can be changed by adjusting the rotating speed of the outdoor fan, so that the defrosting speed is influenced.
Alternatively, the lower the outer coil temperature, the greater the target speed of the outdoor fan. Thus, when the temperature of the outer coil is lower, the higher air circulation speed can accelerate the defrosting speed.
Optionally, the lower the outer coil temperature, the greater the target rotational speed of the outdoor fan, including: n (N) t ＝(0-T c ) X 100. When N is t ＜0.1N n When N t ＝0.1N n . When N is t ＞0.5N n When N t ＝0.5N n . Wherein N is t Is the target rotating speed of the outdoor fan, T c At the outer coil temperature of N n Is the rated rotating speed of the outdoor fan. The variables in the formula represent only numerical values, irrespective of units. Calculated N t In rpm. Therefore, the target rotating speed of the outdoor fan can be calculated, the rotating speed adjustment accuracy is high, and the defrosting efficiency is improved.
As shown in connection with fig. 7, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s220, in case the air conditioner is operated in the cooling mode, the second temperature sensor detects an outdoor ambient temperature.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
S261, when the outer coil temperature is less than the outdoor environment temperature, the third temperature sensor detects the discharge temperature of the compressor.
S264, when the discharge temperature of the compressor is less than the temperature set threshold, the processor turns on the outdoor fan.
S267, the processor determines the target rotating speed of the outdoor fan according to the temperature of the outer coil pipe and the outdoor environment temperature.
And S268, the processor adjusts the rotating speed of the outdoor fan to the target rotating speed.
Thus, the speed of air passing through the heat exchanger can be changed by adjusting the rotating speed of the outdoor fan, so that the defrosting speed is influenced.
Alternatively, the greater the difference between the outer coil temperature and the outdoor ambient temperature, the greater the target rotational speed of the outdoor fan. Thus, when the temperature difference is large, the defrosting speed can be increased by the high air circulation speed.
Optionally, the greater the difference between the outer coil temperature and the outdoor environment temperature, the greater the target rotational speed of the outdoor fan, including: n (N) t ＝(T e -T c ) X 100. When N is t ＜0.1N n When N t ＝0.1N n . When N is t ＞0.5N n When N t ＝0.5N n . Wherein N is t Is the target rotating speed of the outdoor fan, T e Is the outdoor ambient temperature, T c At the outer coil temperature of N n Is the rated rotating speed of the outdoor fan. The variables in the formula represent only numerical values, irrespective of units. Calculated N t In rpm. Therefore, the target rotating speed of the outdoor fan can be calculated, the rotating speed adjustment accuracy is high, and the defrosting efficiency is improved.
As shown in conjunction with fig. 8, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s210, when the air conditioner is in the defrosting mode, the processor controls the air conditioner to operate in the refrigerating mode.
S220, the second temperature sensor detects outdoor environment temperature.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
And S260, controlling the operation of the outdoor fan by the processor under the condition that the temperature of the outer coil pipe is smaller than the outdoor environment temperature.
As shown in conjunction with fig. 9, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s201, a second temperature sensor detects an outdoor ambient temperature.
S202, the processor determines the frost point temperature according to the outdoor environment temperature.
S203, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by a first temperature sensor.
S204, the processor judges whether the time that the temperature of the outer coil is continuously less than the frost point temperature reaches the first set time. If yes, go to step S210. If not, return to step S201.
S210, the processor controls the air conditioner to operate in a refrigeration mode.
S220, the second temperature sensor detects the outdoor ambient temperature again.
S240, the first temperature sensor again detects the outer coil temperature of the outdoor heat exchanger.
And S260, controlling the operation of the outdoor fan by the processor under the condition that the temperature of the outer coil pipe is smaller than the outdoor environment temperature.
When the time that the temperature of the outer coil pipe is continuously smaller than the temperature of the frost point reaches the first set time, the air conditioner enters a defrosting mode. The time that the outer coil temperature continues to be less than the frost point temperature reaches the first set time, i.e., the processor begins timing if the outer coil temperature is less than the frost point temperature. And in the timing time, the temperature of the outer coil pipe is always smaller than the frost point temperature until the timing time reaches the first set time. If the temperature of the outer coil is greater than or equal to the frost point temperature in the timed time, the processor clears the timing.
Therefore, the relationship between the temperature of the external coil pipe and the temperature of the frost point is used as the defrosting condition of the air conditioner, the air conditioner can defrost at a proper time, and the phenomenon that the normal use of a user is influenced by frequent defrosting is avoided.
Alternatively, the higher the outdoor ambient temperature, the higher the frost point temperature.
Optionally, the higher the outdoor ambient temperature, the higher the frost point temperature, including:wherein T is f T is the frost point temperature e Is the outdoor ambient temperature. Thus, the frost point temperature under the current outdoor environment temperature can be calculated, and the frost point temperature can be conveniently compared with the temperature of the outer coil pipe.
The first set time affects the opening time of the outdoor fan, and further affects the defrosting speed of the outdoor unit. The first set time is in the range of [30, 90] s, preferably, the first set time is 45s, 60s or 75s.
Optionally, the processor in step S210 controls the air conditioner to operate in a cooling mode, including: the processor turns off the indoor fan. The processor controls the four-way valve to be powered off. The processor adjusts the opening of the electronic expansion valve. The processor controls the operation of the compressor according to the outdoor ambient temperature. Thus, turning off the indoor fan can prevent the indoor temperature from decreasing. The four-way valve is controlled to be cut off, so that the refrigerant flows from the compressor to the outdoor heat exchanger to realize defrosting. The opening degree of the electronic expansion valve is adjusted to change the flow of the refrigerant in the outdoor heat exchanger and accelerate the defrosting speed. The opening of the electronic expansion valve can be gradually increased along with the defrosting process so as to meet the requirement of quick defrosting.
Optionally, the processor controls the operation of the compressor according to the outdoor environment temperature, including: the processor determines a compressor frequency corresponding to the outdoor ambient temperature based on the outdoor ambient temperature. The processor adjusts the operating frequency of the compressor to the determined compressor frequency. Thus, the efficiency of defrosting can be improved by selecting an appropriate compressor frequency according to the outdoor ambient temperature.
The correspondence between outdoor ambient temperature and compressor frequency is shown in table 1:
TABLE 1
As shown in connection with fig. 10, an embodiment of the present disclosure provides another method for defrosting an air conditioner, including:
s220, in case the air conditioner is operated in the cooling mode, the second temperature sensor detects an outdoor ambient temperature.
S230, the processor determines whether the outdoor environment temperature is greater than a first set threshold and less than a second set threshold. If yes, go to step S240. If not, go to step S265.
S240, detecting the temperature of the outer coil pipe of the outdoor heat exchanger by the first temperature sensor.
S250, the processor judges whether the temperature of the outer coil is less than the outdoor environment temperature. If yes, step S261 is performed. If not, go to step S265.
S261, a third temperature sensor detects an exhaust gas temperature of the compressor.
S263, the processor determines whether the discharge temperature of the compressor is less than a temperature set threshold. If yes, go to step S264. If not, go to step S265.
S264, the processor turns on the outdoor fan and executes step S267.
S265, the processor turns off the outdoor fan and performs step S271.
S267, the processor determines the target rotating speed of the outdoor fan according to the temperature of the outer coil pipe and the outdoor environment temperature.
And S268, the processor adjusts the rotating speed of the outdoor fan to the target rotating speed.
S271, the first temperature sensor detects the outer coil temperature of the outdoor heat exchanger again.
S272, the processor determines whether the time when the outer coil temperature continues to be greater than the third set threshold reaches the second set time. If yes, the defrosting is finished. If not, return to step S220.
Wherein the time that the outer coil temperature continues to be greater than the third set threshold reaches the second set time, i.e., the processor begins timing if the outer coil temperature is greater than the third set threshold. And in the time counted, the temperature of the outer coil pipe is always larger than a third set threshold value until the time counted reaches a second set time. If the temperature of the outer coil is less than or equal to the third set threshold value within the counted time, the processor clears the counted time.
The first set threshold value and the second set threshold value influence the opening time of the outdoor fan, and further influence the defrosting speed of the outdoor unit. The first set threshold is set to a value in the range of [ -3,3] DEG C, preferably at-1 ℃, 0 ℃ or 1 ℃. The range of the second set threshold is (3, 5) deg.c, and preferably the second set threshold takes the value of 4 deg.c, 4.5 deg.c or 5 deg.c.
The third set threshold and the second set time affect the time of defrosting. The third set threshold is in the range of [5, 10] deg.C, preferably 6 deg.C, 7 deg.C or 8 deg.C. The second set time is in the range of [5, 15] s, preferably 8s, 10s or 12s.
Specifically, the first set threshold is 0 ℃, the second set threshold is 5 ℃, the third set threshold is 7 ℃, the temperature set threshold is 25 ℃, the first set time is 60s, the second set time is 10s, the initial environment temperature is 1 ℃, the initial outer coil temperature is-5 ℃, and the initial compressor exhaust temperature is 20 ℃. In the case where the air conditioner is operated in the cooling mode, the second temperature sensor detects that the outdoor ambient temperature is 1 ℃. The processor judges that the outdoor environment temperature is between 0 ℃ and 5 ℃, and the first temperature sensor detects that the temperature of an outer coil pipe of the outdoor heat exchanger is-5 ℃. The processor judges that the temperature of the outer coil is less than 1 ℃, and the third temperature sensor detects that the exhaust temperature of the compressor is 20 ℃. The processor judges that the exhaust temperature of the compressor is less than 25 ℃, and the outdoor fan is started. The processor calculates the target rotating speed of the outdoor fan to be 600rpm according to the temperature of the outer coil pipe and the outdoor environment temperature, and adjusts the rotating speed of the outdoor fan to be 600rpm. The first temperature sensor detects the temperature of the outer coil of the outdoor heat exchanger again, and judges whether defrosting is finished according to the temperature of the outer coil. If the temperature of the outer coil is not higher than 7 ℃ for 10 seconds, returning to the second temperature sensor in the step to detect the outdoor environment temperature, and executing the subsequent step of controlling the operation of the outdoor fan. If the outer coil temperature continues to be greater than 7 ℃ for 10s, defrosting is finished.
As shown in connection with fig. 11, an embodiment of the present disclosure provides an apparatus for defrosting an air conditioner, including a processor (processor) 41 and a memory (memory) 42. Optionally, the apparatus may also include a communication interface (Communication Interface) 43 and a bus 44. The processor 41, the communication interface 43 and the memory 42 may communicate with each other via a bus 44. The communication interface 43 may be used for information transmission. The processor 41 may call logic instructions in the memory 42 to perform the method for defrosting an air conditioner of the above-described embodiment.
Further, the logic instructions in the memory 42 described above may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 42 serves as a storage medium for storing a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 41 executes functional applications and data processing by executing program instructions/modules stored in the memory 42, i.e., implements the method for defrosting an air conditioner in the above-described embodiment.
Memory 42 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the terminal device, etc. In addition, memory 42 may include high-speed random access memory, and may also include non-volatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for defrosting 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 computer readable storage medium or a non-transitory computer readable 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 disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, 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 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 (8)
1. A method for defrosting an air conditioner, comprising:
detecting an outdoor ambient temperature in case that the air conditioner is operated in a cooling mode;
detecting the temperature of an outer coil pipe of the outdoor heat exchanger;
controlling the operation of the outdoor fan under the condition that the temperature of the outer coil pipe is smaller than the outdoor environment temperature;
controlling the operation of the outdoor fan, comprising:
detecting the exhaust temperature of the compressor;
controlling the operation of an outdoor fan according to the exhaust temperature of the compressor;
according to the exhaust temperature of the compressor, controlling the operation of the outdoor fan, comprising:
opening the outdoor fan under the condition that the exhaust temperature of the compressor is smaller than a temperature set threshold value;
closing the outdoor fan under the condition that the exhaust temperature of the compressor is greater than or equal to a temperature set threshold value;
the value range of the temperature setting threshold is 20, 30 deg.C.
2. The method of claim 1, further comprising, after turning on the outdoor fan:
determining a target rotating speed of the outdoor fan according to the temperature of the outer coil;
and adjusting the rotating speed of the outdoor fan to the target rotating speed.
3. The method of claim 2, wherein the lower the outer coil temperature, the greater the target speed of the outdoor fan.
4. The method of claim 3, wherein the lower the outer coil temperature, the greater the target speed of the outdoor fan, comprising:
N t ＝(0-T c )×100；
when N is t ＜0.1N n When N t ＝0.1N n The method comprises the steps of carrying out a first treatment on the surface of the When N is t ＞0.5N n When N t ＝0.5N n ；
Wherein N is t Is the target rotating speed of the outdoor fan, T c At the outer coil temperature of N n Is the rated rotating speed of the outdoor fan.
5. The method according to any one of claims 1 to 4, further comprising, before detecting an outdoor ambient temperature in a case where the air conditioner is operated in the cooling mode:
and when the air conditioner is in the defrosting mode, controlling the air conditioner to operate in the refrigerating mode.
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 according to any one of claims 1 to 5 when the program instructions are run.
7. An air conditioner comprising the apparatus for defrosting an air conditioner according to claim 6.
8. A storage medium storing program instructions which, when executed, perform the method for defrosting an air conditioner of any one of claims 1 to 5.
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