CN114061033A - 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 PDF

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Publication number
CN114061033A
CN114061033A CN202111294451.7A CN202111294451A CN114061033A CN 114061033 A CN114061033 A CN 114061033A CN 202111294451 A CN202111294451 A CN 202111294451A CN 114061033 A CN114061033 A CN 114061033A
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Prior art keywords
temperature
air conditioner
outdoor
defrosting
outdoor fan
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CN202111294451.7A
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Chinese (zh)
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CN114061033B (en
Inventor
王涛
张千
张道明
李鹏
武永宾
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Publication of CN114061033A publication Critical patent/CN114061033A/en
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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
    • 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
    • F24F11/70—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
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

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 under a condition that the air conditioner operates in a cooling mode; detecting the temperature of an outer coil of the outdoor heat exchanger; and under the condition that the temperature of the outer coil pipe is lower than the outdoor environment temperature, controlling the outdoor fan to operate. When the outdoor unit of the air conditioner defrosts, the air conditioner operates in a refrigeration mode, and a refrigerant flows through the outdoor heat exchanger for defrosting. In the defrosting process, when the temperature of an outer coil of the outdoor heat exchanger is lower than the outdoor environment temperature, the outdoor fan is controlled to operate. Because the temperature of the external coil pipe is lower than the outdoor environment temperature, the air sucked by the outdoor fan can be heated to carry out auxiliary defrosting when flowing through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit is increased. The application also discloses a device for defrosting the air conditioner, the air conditioner and a storage medium.

Description

Method and device for defrosting air conditioner, air conditioner and storage medium
Technical Field
The present application relates to the field of air conditioner technology, 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 is frosted, the heating capacity of the air conditioner is reduced, and the air conditioner needs to be recovered by defrosting. The heat exchanger needs a long time during defrosting, which causes large indoor temperature fluctuation and influences normal use of users.
The prior art outdoor unit defrosting control method comprises the following steps: detecting a defrosting starting signal of the outdoor unit of the air conditioner; closing a compressor of the air conditioner and maintaining the rotation of a fan of an outdoor unit of the air conditioner; after the compressor is closed for a first preset time, controlling a 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 is switched for a second preset time, the fan is turned off; and after the fan is turned off for a third preset time, starting the compressor at a first preset 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 only 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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for defrosting an air conditioner, 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 under a condition that the air conditioner operates in a cooling mode; detecting the temperature of an outer coil of the outdoor heat exchanger; and under the condition that the temperature of the outer coil pipe is lower than the outdoor environment temperature, controlling the outdoor fan to operate.
Optionally, controlling the outdoor fan to operate comprises: detecting the exhaust temperature of the compressor; and controlling the outdoor fan to operate according to the exhaust temperature of the compressor.
Optionally, controlling the outdoor fan to operate according to the discharge temperature of the compressor, comprising: starting an outdoor fan under the condition that the exhaust temperature of the compressor is less than a temperature set threshold; and turning off the outdoor fan under the condition that the exhaust temperature of the compressor is greater than or equal to the temperature set threshold value.
Optionally, after the outdoor fan is turned on, the method further includes: determining the target rotating speed of the outdoor fan according to the temperature of the outer coil pipe; and adjusting the rotating speed of the outdoor fan to a target rotating speed.
Optionally, the lower the outer coil temperature, the greater the target speed of the outdoor fan.
Optionally, the lower the temperature of the external coil, the greater the target rotation speed of the outdoor fan, including: n is a radical oft＝(0-Tc) X 100; when N is presentt＜0.1NnWhen N is presentt＝0.1Nn(ii) a When N is presentt＞0.5NnWhen N is presentt＝0.5Nn(ii) a Wherein N istIs the target rotation speed, T, of the outdoor fancIs the outside coil temperature, NnThe rated rotating speed of the outdoor fan.
Optionally, in a case that the air conditioner operates in the cooling mode, before detecting the outdoor ambient temperature, the method further includes: and controlling the air conditioner to operate in a cooling mode under the condition that the air conditioner is in a defrosting mode.
In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, perform the above-described method for defrosting an air conditioner.
In some embodiments, the air conditioner includes the above-described apparatus for defrosting an air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the above-described method for defrosting an air conditioner.
The method and the device for defrosting the air conditioner, the air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
when the outdoor unit of the air conditioner defrosts, the air conditioner operates in a refrigeration mode, and a refrigerant flows through the outdoor heat exchanger for defrosting. In the defrosting process, when the temperature of an outer coil of the outdoor heat exchanger is lower than the outdoor environment temperature, the outdoor fan is controlled to operate. Because the temperature of the external coil pipe is lower than the outdoor environment temperature, the air sucked by the outdoor fan can be heated to carry out auxiliary defrosting when flowing through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit is increased.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic structural diagram of an air conditioner provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of electrical connections of an air conditioner according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a method for defrosting an air conditioner according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of 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 present 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 diagram 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 throttling element; 15: an electronic expansion valve; 16: an indoor heat exchanger; 17: an outdoor fan; 18: an indoor fan; 19: an outer coil pipe; 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 elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can 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. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
As shown in fig. 1 and 2, the air conditioner 1 includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a throttling element 14, an electronic expansion valve 15, an indoor heat exchanger 16, an outdoor fan 17, an indoor fan 18, and an external 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 includes 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 disposed on the outer coil 19 and is configured to detect a temperature of the outer coil 19. The second temperature sensor 21 is disposed in the outdoor unit of the air conditioner 1, and detects an 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, the outdoor fan 17 and the indoor fan 18 to be operated, and to adjust the operation frequency of the compressor 11 and the opening degree of the electronic expansion valve 15, according to the outdoor ambient temperature, the temperature of the external coil 19, and the discharge temperature of the compressor 11.
Referring to fig. 3, an embodiment of the present disclosure provides a method for defrosting an air conditioner, including:
and S220, under the condition that the air conditioner operates in the cooling mode, detecting the outdoor environment temperature by the second temperature sensor.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
And S260, controlling the outdoor fan to operate by the processor under the condition that the temperature of the external coil pipe is lower than the outdoor environment temperature.
By adopting the defrosting method for 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 a refrigerant flows through the outdoor heat exchanger for defrosting. In the defrosting process, when the temperature of an outer coil of the outdoor heat exchanger is lower than the outdoor environment temperature, the outdoor fan is controlled to operate. Because the temperature of the external coil pipe is lower than the outdoor environment temperature, the air sucked by the outdoor fan can be heated to carry out auxiliary defrosting when flowing through the outdoor heat exchanger, so that the defrosting speed of the outdoor unit is increased.
Referring to fig. 4, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S220, under the condition that the air conditioner operates in the cooling mode, detecting the outdoor environment temperature by the second temperature sensor.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
S261, the third temperature sensor detects a discharge temperature of the compressor when the outside coil temperature is less than the outdoor ambient temperature.
And S262, controlling the outdoor fan to operate by the processor according to the exhaust temperature of the compressor.
Therefore, the outdoor fan is controlled to operate according to the exhaust temperature of the compressor, and the influence of the outdoor fan on the defrosting process can be reduced.
Referring to fig. 5, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S220, under the condition that the air conditioner operates in the cooling mode, detecting the outdoor environment temperature by the second temperature sensor.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
S261, the third temperature sensor detects a discharge temperature of the compressor when the outside coil temperature is less than the outdoor ambient temperature.
S263, the processor judges whether the exhaust temperature of the compressor is less than a temperature setting threshold. If yes, go to step S264. If not, go to step S265.
And S264, the processor starts the outdoor fan.
And S265, turning off the outdoor fan by the processor.
Therefore, when the exhaust temperature of the compressor is higher, the situation that the outdoor fan discharges hot air generated by the compressor out of the outdoor unit can be reduced, and the defrosting efficiency is not influenced.
The magnitude of the temperature setting threshold value influences the starting time of the outdoor fan, and further influences the defrosting speed of the outdoor unit. The temperature setting threshold is set to be in the range of 20, 30 ℃, preferably 22 ℃, 25 ℃ or 27 DEG C
Referring to fig. 6, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S220, under the condition that the air conditioner operates in the cooling mode, detecting the outdoor environment temperature by the second temperature sensor.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
S261, the third temperature sensor detects a discharge temperature of the compressor when the outside coil temperature is less than the outdoor ambient temperature.
And S264, under the condition that the exhaust temperature of the compressor is less than the set temperature threshold value, the processor starts the outdoor fan.
And S266, the processor determines the target rotating speed of the outdoor fan according to the temperature of the external coil.
And S268, adjusting the rotating speed of the outdoor fan to the target rotating speed by the processor.
Therefore, 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.
Optionally, 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 defrosting speed can be increased by the higher air circulation speed.
Optionally, the lower the temperature of the external coil, the greater the target rotation speed of the outdoor fan, including: n is a radical oft＝(0-Tc) X 100. When N is presentt＜0.1NnWhen N is presentt＝0.1Nn. When N is presentt＞0.5NnWhen N is presentt＝0.5Nn. Wherein N istIs the target rotation speed, T, of the outdoor fancIs the outside coil temperature, NnThe rated rotating speed of the outdoor fan. Variables in the formula represent only numerical values, regardless of units. Calculated NtIn rpm. Therefore, the target rotating speed of the outdoor fan can be calculated, the rotating speed adjusting accuracy is high, and the defrosting efficiency is improved.
Referring to fig. 7, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S220, under the condition that the air conditioner operates in the cooling mode, detecting the outdoor environment temperature by the second temperature sensor.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
S261, the third temperature sensor detects a discharge temperature of the compressor when the outside coil temperature is less than the outdoor ambient temperature.
And S264, under the condition that the exhaust temperature of the compressor is less than the set temperature threshold value, the processor starts the outdoor fan.
And S267, determining the target rotating speed of the outdoor fan by the processor according to the temperature of the external coil and the outdoor environment temperature.
And S268, adjusting the rotating speed of the outdoor fan to the target rotating speed by the processor.
Therefore, 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.
Optionally, the greater the difference between the temperature of the external coil and the outdoor ambient temperature, the greater the target rotation speed of the outdoor fan. Therefore, 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 temperature of the external coil and the temperature of the outdoor environment, the greater the target rotation speed of the outdoor fan, including: n is a radical oft＝(Te-Tc) X 100. When N is presentt＜0.1NnWhen N is presentt＝0.1Nn. When N is presentt＞0.5NnWhen N is presentt＝0.5Nn. Wherein N istIs the target rotation speed, T, of the outdoor faneIs the outdoor ambient temperature, TcIs the outside coil temperature, NnThe rated rotating speed of the outdoor fan. Variables in the formula represent only numerical values, regardless of units. Calculated NtIn rpm. Therefore, the target rotating speed of the outdoor fan can be calculated, the rotating speed adjusting accuracy is high, and the defrosting efficiency is improved.
Referring to fig. 8, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S210, controlling the air conditioner to operate in a cooling mode by the processor under the condition that the air conditioner is in the defrosting mode.
And S220, detecting the outdoor environment temperature by the second temperature sensor.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
And S260, controlling the outdoor fan to operate by the processor under the condition that the temperature of the external coil pipe is lower than the outdoor environment temperature.
Referring to fig. 9, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S201, detecting the outdoor environment temperature by a second temperature sensor.
S202, the processor determines the frost point temperature according to the outdoor environment temperature.
S203, the first temperature sensor detects the temperature of the outer coil of the outdoor heat exchanger.
S204, the processor judges whether the time that the temperature of the external coil pipe is continuously less than the frost point temperature reaches a first set time. If yes, go to step S210. If not, the process returns to step S201.
And S210, controlling the air conditioner to operate in a cooling mode by the processor.
S220, the second temperature sensor again detects the outdoor ambient temperature.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger again by the first temperature sensor.
And S260, controlling the outdoor fan to operate by the processor under the condition that the temperature of the external coil pipe is lower than the outdoor environment temperature.
When the time that the temperature of the external coil pipe is continuously less than the frost point temperature reaches a first set time, the air conditioner enters a defrosting mode. The time that the temperature of the outer coil is continuously less than the frost point temperature reaches a first set time, namely, in the case that the temperature of the outer coil is less than the frost point temperature, the processor starts timing. And in the timed time, the temperature of the outer coil is always less than the frost point temperature until the timed time reaches a first set time. And if the temperature of the external coil pipe is greater than or equal to the frost point temperature within the timed time, the processor is cleared for timing.
Therefore, the relationship between the temperature of the outer coil and the frost point temperature is used as the defrosting condition of the air conditioner, the air conditioner can defrost at a proper time, and the influence of frequent defrosting on normal use of a user 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:
Figure BDA0003336131430000081
wherein, TfIs frost point temperature, TeIs the outdoor ambient temperature. Therefore, the frost point temperature under the current outdoor environment temperature can be calculated, and the comparison with the temperature of the external coil pipe is convenient.
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 a range of [30, 90] s, and preferably, the first set time is 45s, 60s or 75 s.
Optionally, the processor in step S210 controls the air conditioner to operate in the 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 degree of the electronic expansion valve. The processor controls the operation of the compressor according to the outdoor environment temperature. Thus, turning off the indoor fan can prevent the indoor temperature from dropping. And the four-way valve is controlled to be powered off, so that the refrigerant can flow from the compressor to the outdoor heat exchanger to defrost. The opening degree of the electronic expansion valve is adjusted to change the circulation of the refrigerant in the outdoor heat exchanger, and the defrosting speed is accelerated. The opening degree 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 ambient 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 defrosting efficiency can be improved by selecting a suitable compressor frequency according to the outdoor environment temperature.
The corresponding relationship between the outdoor ambient temperature and the compressor frequency is shown in table 1:
TABLE 1
Figure BDA0003336131430000091
Referring to fig. 10, another method for defrosting an air conditioner according to an embodiment of the present disclosure includes:
and S220, under the condition that the air conditioner operates in the cooling mode, detecting the outdoor environment temperature by the second temperature sensor.
S230, the processor determines whether the outdoor ambient 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.
And S240, detecting the temperature of the outer coil of the outdoor heat exchanger by the first temperature sensor.
And S250, judging whether the temperature of the external coil is less than the outdoor environment temperature by the processor. If yes, go to step S261. If not, go to step S265.
S261, the third temperature sensor detects a discharge temperature of the compressor.
S263, the processor judges whether the exhaust temperature of the compressor is less than a temperature setting 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 executes step S271.
And S267, determining the target rotating speed of the outdoor fan by the processor according to the temperature of the external coil and the outdoor environment temperature.
And S268, adjusting the rotating speed of the outdoor fan to the target rotating speed by the processor.
And S271, detecting the temperature of the outer coil of the outdoor heat exchanger again by the first temperature sensor.
S272, the processor judges whether the time that the temperature of the external coil pipe is continuously greater than the third set threshold reaches the second set time. If yes, defrosting is finished. If not, the process returns to step S220.
And the time that the temperature of the external coil pipe is continuously greater than the third set threshold reaches the second set time, namely, the processor starts to time under the condition that the temperature of the external coil pipe is greater than the third set threshold. And in the timed time, the temperature of the outer coil is always greater than a third set threshold value until the timed time reaches a second set time. And if the temperature of the external coil pipe is less than or equal to a third set threshold value within the timed time, the processor is cleared for timing.
The first set threshold and the second set threshold affect the starting time of the outdoor fan, and further affect the defrosting speed of the outdoor unit. The value range of the first set threshold is [ -3, 3] ° c, and preferably, the value of the first set threshold is-1 ℃, 0 ℃ or 1 ℃. The second threshold is in the range of (3, 5), preferably 4 ℃, 4.5 ℃ or 5 ℃.
The third set threshold and the second set time affect the time to defrost. The value range of the third set threshold is [5, 10] ° c, preferably, the value of the third set threshold is 6 ℃, 7 ℃ or 8 ℃. The value range of the second set time is [5, 15] s, and preferably, the value of the second set time is 8s, 10s or 12 s.
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 ambient temperature is 1 ℃, the initial outer coil temperature is-5 ℃, and the initial compressor discharge 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 the outer coil of the outdoor heat exchanger is-5 ℃. The processor judges that the temperature of the external 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. And the processor calculates the target rotating speed of the outdoor fan to be 600rpm according to the temperature of the external coil and the outdoor environment temperature, and adjusts the rotating speed of the outdoor fan to be 600 rpm. The first temperature sensor detects the temperature of the outer coil of the outdoor heat exchanger again, and whether defrosting is finished or not is judged according to the temperature of the outer coil. And if the time that the temperature of the outer coil pipe is continuously more than 7 ℃ does not reach 10s, returning to the step that the second temperature sensor detects the outdoor environment temperature and executing the subsequent step of controlling the operation of the outdoor fan. And if the temperature of the outer coil pipe lasts for more than 7 ℃ for 10s, finishing defrosting.
As shown in fig. 11, an embodiment of the present disclosure provides an apparatus for defrosting an air conditioner, which includes a processor (processor)41 and a memory (memory) 42. Optionally, the apparatus may further 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 transfer. 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.
Furthermore, the logic instructions in the memory 42 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 42 is a storage medium and can be used for storing software programs, computer executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 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.
The memory 42 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 42 may include a high speed random access memory and may also include a 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 described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A method for defrosting an air conditioner, comprising:
detecting an outdoor ambient temperature under a condition that the air conditioner operates in a cooling mode;
detecting the temperature of an outer coil of the outdoor heat exchanger;
and under the condition that the temperature of the outer coil pipe is lower than the outdoor environment temperature, controlling the outdoor fan to operate.
2. The method of claim 1, wherein controlling the outdoor fan operation comprises:
detecting the exhaust temperature of the compressor;
and controlling the outdoor fan to operate according to the exhaust temperature of the compressor.
3. The method of claim 2, wherein controlling the outdoor fan to operate based on a discharge temperature of the compressor comprises:
starting an outdoor fan under the condition that the exhaust temperature of the compressor is less than a temperature set threshold;
and turning off the outdoor fan under the condition that the exhaust temperature of the compressor is greater than or equal to the temperature set threshold value.
4. The method of claim 3, further comprising, after turning on the outdoor fan:
determining the target rotating speed of the outdoor fan according to the temperature of the outer coil pipe;
and adjusting the rotating speed of the outdoor fan to a target rotating speed.
5. The method of claim 4, wherein the target speed of the outdoor fan is greater the lower the outer coil temperature.
6. The method of claim 5, wherein the lower the outer coil temperature, the greater the target speed of the outdoor fan comprises:
Nt＝(0-Tc)×100；
when N is presentt＜0.1NnWhen N is presentt＝0.1Nn(ii) a When N is presentt＞0.5NnWhen N is presentt＝0.5Nn；
Wherein N istFor the purpose of outdoor fansSpeed, TcIs the outside coil temperature, NnThe rated rotating speed of the outdoor fan.
7. The method according to any one of claims 1 to 6, wherein before detecting the outdoor ambient temperature in the case where the air conditioner is operated in the cooling mode, further comprising:
and controlling the air conditioner to operate in a cooling mode under the condition that the air conditioner is in a defrosting mode.
8. An apparatus for defrosting an air conditioner comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to perform the method for defrosting an air conditioner of any one of claims 1 to 7 when executing the program instructions.
9. An air conditioner characterized by comprising the device for defrosting an air conditioner according to claim 8.
10. A storage medium storing program instructions, characterized in that the program instructions, when executed, perform a method for defrosting an air conditioner according to any one of claims 1 to 7.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114738926A (en) * 2022-04-27 2022-07-12 青岛海尔空调器有限总公司 Air conditioner control method and device
CN114857749A (en) * 2022-04-29 2022-08-05 海信（广东）空调有限公司 Air conditioner and method for controlling defrosting of air conditioner
CN115654659A (en) * 2022-11-04 2023-01-31 青岛海尔空调器有限总公司 Control method and control device of air conditioner and air conditioner

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104613601A (en) * 2015-01-29 2015-05-13 广东美的制冷设备有限公司 Method and device for controlling outdoor fan in split air-conditioner
CN104729006A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 air conditioner defrosting control method and device
CN105135620A (en) * 2015-09-11 2015-12-09 广东美的暖通设备有限公司 Air conditioner outdoor unit defrosting method
CN106369750A (en) * 2016-09-08 2017-02-01 广东美的暖通设备有限公司 Defrosting control method and defrosting control device of air conditioner and air conditioner
CN107152819A (en) * 2017-06-06 2017-09-12 青岛海尔空调器有限总公司 Air-conditioning device and its control method
CN107514735A (en) * 2017-07-13 2017-12-26 青岛海尔空调器有限总公司 The defrosting control method and control device of air-conditioning
CN107830606A (en) * 2017-11-28 2018-03-23 广东美的制冷设备有限公司 Progress control method, device, air conditioner and computer-readable recording medium
CN110836482A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110940057A (en) * 2019-12-12 2020-03-31 宁波奥克斯电气股份有限公司 Control method for slowing down defrosting attenuation of air conditioner and air conditioner
JP2020051667A (en) * 2018-09-26 2020-04-02 東芝キヤリア株式会社 Air conditioner
CN112432309A (en) * 2020-11-26 2021-03-02 珠海格力电器股份有限公司 Air conditioner and air conditioner control method
CN112923512A (en) * 2021-02-02 2021-06-08 三一汽车起重机械有限公司 Air conditioner defrosting control method and device and air conditioner

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104729006A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 air conditioner defrosting control method and device
CN104613601A (en) * 2015-01-29 2015-05-13 广东美的制冷设备有限公司 Method and device for controlling outdoor fan in split air-conditioner
CN105135620A (en) * 2015-09-11 2015-12-09 广东美的暖通设备有限公司 Air conditioner outdoor unit defrosting method
CN106369750A (en) * 2016-09-08 2017-02-01 广东美的暖通设备有限公司 Defrosting control method and defrosting control device of air conditioner and air conditioner
CN107152819A (en) * 2017-06-06 2017-09-12 青岛海尔空调器有限总公司 Air-conditioning device and its control method
CN107514735A (en) * 2017-07-13 2017-12-26 青岛海尔空调器有限总公司 The defrosting control method and control device of air-conditioning
CN107830606A (en) * 2017-11-28 2018-03-23 广东美的制冷设备有限公司 Progress control method, device, air conditioner and computer-readable recording medium
CN110836482A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
JP2020051667A (en) * 2018-09-26 2020-04-02 東芝キヤリア株式会社 Air conditioner
CN110940057A (en) * 2019-12-12 2020-03-31 宁波奥克斯电气股份有限公司 Control method for slowing down defrosting attenuation of air conditioner and air conditioner
CN112432309A (en) * 2020-11-26 2021-03-02 珠海格力电器股份有限公司 Air conditioner and air conditioner control method
CN112923512A (en) * 2021-02-02 2021-06-08 三一汽车起重机械有限公司 Air conditioner defrosting control method and device and air conditioner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘华: "《家用空调电气控制及维修222问》", 31 August 1996, pages: 17 - 18 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114738926A (en) * 2022-04-27 2022-07-12 青岛海尔空调器有限总公司 Air conditioner control method and device
CN114857749A (en) * 2022-04-29 2022-08-05 海信（广东）空调有限公司 Air conditioner and method for controlling defrosting of air conditioner
CN114857749B (en) * 2022-04-29 2023-10-13 海信（广东）空调有限公司 Air conditioner and method for controlling defrosting of air conditioner
CN115654659A (en) * 2022-11-04 2023-01-31 青岛海尔空调器有限总公司 Control method and control device of air conditioner and air conditioner

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