CN115076905B - Defrosting control method and device and air conditioner - Google Patents

Defrosting control method and device and air conditioner Download PDF

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Publication number
CN115076905B
CN115076905B CN202210953781.0A CN202210953781A CN115076905B CN 115076905 B CN115076905 B CN 115076905B CN 202210953781 A CN202210953781 A CN 202210953781A CN 115076905 B CN115076905 B CN 115076905B
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temperature
preset
attenuation degree
outdoor environment
indoor unit
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CN115076905A (en
Inventor
秦宪
赖东锋
张新玉
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • 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)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the invention provides a defrosting control method and device and an air conditioner, and relates to the technical field of air conditioners. The method comprises the following steps: firstly, when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature, and detecting the current evaporator coil temperature, the current indoor unit temperature and the current outdoor environment temperature according to a preset time interval. And then, respectively calculating the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature, and performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature. As the judgment temperature of the evaporator, the air outlet temperature of the indoor unit and the outdoor environment temperature are integrated, the defrosting control is more accurate.

Description

Defrosting control method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device and an air conditioner.
Background
In a fixed-frequency air conditioner on the market, an inner-disc temperature sensing bulb is generally arranged in an evaporator of an indoor unit of the air conditioner and used for detecting the temperature of a coil pipe of the evaporator. When the constant-frequency air conditioner is in refrigeration operation, whether the indoor unit of the air conditioner is full of frost or not is judged by detecting whether the temperature of the inner disc of the evaporator is attenuated or not and how much the temperature of the inner disc of the evaporator is attenuated or not, and whether the defrosting control of the evaporator is needed or not is judged.
However, changes in the outdoor environment may cause changes in the temperature of the indoor unit evaporator coil. When the air conditioner is operated in cooling, if the outdoor ambient temperature is drastically reduced due to weather, the evaporator coil temperature is also drastically reduced. At this time, there may be a case that the indoor unit evaporator does not form frost, but the air conditioner enters the defrosting control, which affects the use of the air conditioner.
Disclosure of Invention
The invention aims at providing a defrosting control method and device and an air conditioner, which can control defrosting of the air conditioner by detecting the temperature of an evaporator coil of the air conditioner, the air outlet temperature of an indoor unit and the outdoor environment temperature and according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature, so that the defrosting control is more accurate.
In order to achieve the above object, the technical scheme adopted by the embodiment of the invention is as follows:
in a first aspect, an embodiment of the present invention provides a defrosting control method, including:
when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature;
Detecting the current temperature of the evaporator coil, the current air outlet temperature of the indoor unit and the current outdoor environment temperature according to preset time intervals;
respectively calculating the initial evaporator coil temperature and the current evaporator coil temperature, the initial indoor unit air-out temperature and the current indoor unit air-out temperature, and the initial outdoor environment temperature and the current outdoor environment temperature to obtain the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air-out temperature and the change value of the outdoor environment temperature;
and controlling defrosting of the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature.
Compared with the prior art, the defrosting control method provided by the embodiment detects the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature when the air conditioner is started and operated for a set period of time, and detects the current evaporator coil temperature, the current indoor unit temperature and the current outdoor environment temperature according to a preset time interval. And then respectively calculating the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature, and performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature. As the judgment temperature of the evaporator, the air outlet temperature of the indoor unit and the outdoor environment temperature are integrated, the defrosting control is more accurate.
In one possible implementation manner, the step of performing defrosting control on the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air outlet temperature and the variation value of the outdoor environment temperature includes:
if the initial outdoor environment temperature is greater than or equal to a first set temperature, performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a first preset temperature difference;
if the initial outdoor environment temperature is smaller than the first set temperature and larger than or equal to the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a second preset temperature difference;
if the initial outdoor environment temperature is smaller than the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a third preset temperature difference;
The first preset temperature difference is larger than the second preset temperature difference, and the second preset temperature difference is larger than the third preset temperature difference.
In one possible implementation manner, the step of performing defrosting control on the air conditioner according to the relationship between the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and a first preset temperature difference includes:
comparing the attenuation degree of the temperature of the evaporator coil with the first preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the first preset temperature difference, the current rotating speed of the indoor fan is increased by a first preset rotating speed, and after a first set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the first preset temperature difference;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the first preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the first preset rotating speed, and comparing the change value of the outdoor environment temperature with the first preset temperature difference after the first set time length;
and if the change value of the outdoor environment temperature is larger than the first preset temperature difference, controlling the air conditioner to defrost.
In one possible implementation manner, the step of controlling defrosting of the air conditioner according to the relationship between the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and the first preset temperature difference further includes:
if the attenuation degree of the temperature of the evaporator coil is not greater than the first preset temperature difference, controlling the air conditioner to operate according to the current parameters;
if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the first preset temperature difference, controlling the air conditioner to operate with current parameters, and after the first set duration, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the first preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the first preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the first set time length, returning to the step of comparing the change value of the outdoor environment temperature with the first preset temperature difference.
In one possible implementation manner, the step of performing defrosting control on the air conditioner according to the relationship between the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and a second preset temperature difference includes:
Comparing the attenuation degree of the temperature of the evaporator coil with the second preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the second preset temperature difference, the current rotating speed of the indoor fan is increased by a second preset rotating speed, and after a second set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the second preset temperature difference;
the second preset rotating speed is higher than the first preset rotating speed, and the second set duration is shorter than the first set duration;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the second preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the second preset rotating speed, and comparing the change value of the outdoor environment temperature with the second preset temperature difference after the second set time length;
and if the change value of the outdoor environment temperature is larger than the second preset temperature difference, controlling the air conditioner to defrost.
In one possible implementation manner, the step of controlling defrosting of the air conditioner according to the relationship between the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and a second preset temperature difference further includes:
If the attenuation degree of the temperature of the evaporator coil is not greater than the second preset temperature difference, controlling the air conditioner to operate according to the current parameters;
if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameters, and after the second set time length, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the second preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the second set time length, returning to the step of comparing the change value of the outdoor environment temperature with the second preset temperature difference.
In one possible implementation manner, the step of performing defrosting control on the air conditioner according to the relationship between the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and a third preset temperature difference includes:
comparing the attenuation degree of the temperature of the evaporator coil with the third preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the third preset temperature difference, the current rotating speed of the indoor fan is increased by the third preset rotating speed, and after a third set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the third preset temperature difference;
The third preset rotating speed is higher than the second preset rotating speed, and the third set duration is shorter than the second set duration;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the third preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the third preset rotating speed, and comparing the change value of the outdoor environment temperature with the third preset temperature difference after the third set time length;
and if the change value of the outdoor environment temperature is larger than the third preset temperature difference, controlling the air conditioner to defrost.
In one possible implementation manner, the step of controlling defrosting of the air conditioner according to the relationship between the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and a third preset temperature difference further includes:
if the attenuation degree of the temperature of the evaporator coil is not greater than the third preset temperature difference, controlling the air conditioner to operate according to the current parameters;
if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the third preset temperature difference, controlling the air conditioner to operate with current parameters, and after the third set duration, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the third preset temperature difference;
And if the change value of the outdoor environment temperature is not greater than the third preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the third set time length, returning to the step of comparing the change value of the outdoor environment temperature with the third preset temperature difference.
In a second aspect, an embodiment of the present invention further provides a defrosting control device, including:
the detection module is used for:
when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature;
detecting the current temperature of the evaporator coil, the current air outlet temperature of the indoor unit and the current outdoor environment temperature according to preset time intervals;
the calculation module is used for respectively calculating the initial evaporator coil temperature and the current evaporator coil temperature, the initial indoor unit air-out temperature and the current indoor unit air-out temperature, the initial outdoor environment temperature and the current outdoor environment temperature to obtain the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air-out temperature and the change value of the outdoor environment temperature;
and the control module is used for controlling the defrosting of the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature.
In a third aspect, an embodiment of the present invention further provides an air conditioner, including:
one or more processors;
and a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the defrosting control method as described above.
Compared with the prior art, the defrosting control method and device and the air conditioner provided by the embodiment of the invention comprise the following steps: firstly, when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature, and detecting the current evaporator coil temperature, the current indoor unit temperature and the current outdoor environment temperature according to a preset time interval. And then, respectively calculating the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature, and performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature. As the judgment temperature of the evaporator, the air outlet temperature of the indoor unit and the outdoor environment temperature are integrated, the defrosting control is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic installation diagram of an inner disk bulb according to an embodiment of the present invention.
Fig. 2 is a flow chart of a defrosting control method according to an embodiment of the present invention.
Fig. 3 is an exemplary diagram of a defrosting control method according to an embodiment of the present invention.
Fig. 4 is a block schematic diagram of a defrosting control device according to an embodiment of the present invention.
Fig. 5 is a block schematic diagram of an air conditioner according to an embodiment of the present invention.
Icon: 100-an air conditioner; 101-memory; 102-a processor; 103-evaporator coil temperature sensing bulb; 104, an indoor unit air outlet temperature sensing bulb; 105-an outdoor ambient temperature bulb; 200-defrosting control device; 201-a detection module; 202-a computing module; 203-a control module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In a fixed-frequency air conditioner on the market, an inner-disc temperature sensing bulb is generally arranged on an evaporator of an indoor unit of the air conditioner and used for detecting the temperature of a coil pipe of the evaporator. As shown in fig. 1, a schematic installation diagram of the inner disk bulb is shown. When the constant-frequency air conditioner is in refrigeration operation, whether the temperature of the coil pipe of the evaporator is attenuated or not and the attenuation degree are detected through the inner-disc temperature sensing bag in fig. 1, so as to judge whether the indoor unit of the air conditioner is full of frost or not, and whether defrosting control is needed or not.
However, the temperature of the evaporator coil of the indoor unit may vary due to the change in the outdoor environment. When the air conditioner is operated in cooling, if the outdoor ambient temperature is drastically reduced due to weather, the evaporator coil temperature is also drastically reduced. At this time, there may be a case that the indoor unit evaporator does not form frost, but the air conditioner enters the defrosting control, which affects the use of the air conditioner.
In view of the above problems, the present embodiment provides a defrosting control method, which detects the temperature of an evaporator coil of an air conditioner, the air outlet temperature of an indoor unit, and the outdoor environment temperature, and performs defrosting control on an air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, and the variation value of the outdoor environment temperature, so that defrosting control is more accurate.
The following is a detailed description.
Referring to fig. 2, fig. 2 shows a flow of a defrosting control method provided in this embodiment, and the defrosting control method may include the following steps S110 to S140.
S110, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature when the air conditioner is started and operated for a set period of time.
In this embodiment, since the inner pan bulb is welded to the evaporator by spot welding in the prior art, as shown in fig. 1. If the welding position is deviated or the welding flux is less, the temperature sensing bulb is not fully contacted with the evaporator, so that the detected temperature value of the evaporator coil is distorted, and the indoor unit of the air conditioner cannot timely defrost when frosting.
Therefore, in order to overcome the above-mentioned problems, the defrosting control method provided by the embodiment of the invention makes the detected temperature of the evaporator coil more accurate by welding the sleeve of the evaporator coil temperature sensing bulb on the elbow of the evaporator and inserting the evaporator coil temperature sensing bulb into the sleeve.
In addition, the air conditioner is also provided with an indoor unit air outlet temperature sensing bulb and an outdoor environment temperature sensing bulb. The indoor unit air outlet temperature sensing bulb is arranged at the indoor unit air outlet and used for detecting the indoor unit air outlet temperature. The outdoor environment temperature sensing bulb is arranged at the air inlet of the outdoor unit and used for detecting the outdoor environment temperature.
The set time is set by a technician according to experience, and when the air conditioner is started to run for the set time, the control of the air conditioner tends to be stable, and at the moment, all temperature data can be detected and controlled. For example, the set time period may be 30 minutes.
S120, detecting the current temperature of the evaporator coil, the current air outlet temperature of the indoor unit and the current outdoor environment temperature according to a preset time interval.
In this embodiment, the preset time interval is set empirically by a technician, for example, the preset time interval is 10 minutes.
S130, respectively calculating the difference values of the initial evaporator coil temperature and the current evaporator coil temperature, the initial indoor unit air-out temperature and the current indoor unit air-out temperature, and the initial outdoor environment temperature and the current outdoor environment temperature to obtain the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air-out temperature and the change value of the outdoor environment temperature.
In the present embodiment, the initial evaporator coil temperature, the initial indoor unit outlet air temperature and the initial outdoor ambient temperature are respectively T Coil initiation 、T Initial air-out And T Environment initiation A representation; the current temperature of the coil pipe of the evaporator, the current air outlet temperature of the indoor unit and the current outdoor environment temperature are respectively T Coil pipe is current 、T Air outlet current And T Environment is currently A representation; evaporatorThe attenuation degree of the coil pipe temperature, the attenuation degree of the indoor unit air outlet temperature and the change value of the outdoor environment temperature are respectively T Coil pipe attenuation 、T Air-out attenuation And T Environmental change And (3) representing.
Then T is Coil pipe attenuation ＝T Coil initiation -T Coil pipe is current 、T Air-out attenuation ＝T Initial air-out -T Air outlet current 、T Environmental change ＝T Environment initiation -T Environment is currently 。
And S140, performing defrosting control on the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature.
Compared with the prior art, the defrosting control method provided by the embodiment of the invention has the advantages that the defrosting control is carried out on the air conditioner by detecting the temperature of the evaporator coil, the air outlet temperature of the indoor unit and the outdoor environment temperature and according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature, the problem that the temperature of the evaporator coil is rapidly reduced due to the change of the outdoor environment temperature, so that the defrosting control is carried out on the air conditioner by mistake in the prior art is solved. Because the temperature of the evaporator coil, the air outlet temperature of the indoor unit and the outdoor environment temperature are comprehensively considered, defrosting control is more accurate.
Alternatively, step S140 may include sub-steps S1401-S1403 described below.
And S1401, if the initial outdoor environment temperature is greater than or equal to the first set temperature, performing defrosting control on the air conditioner according to the relation among the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the change value of the outdoor environment temperature and the first preset temperature difference.
In this embodiment, the first set temperature and the first preset temperature difference are both set by a technician according to experience, for example, the first set temperature may be 20 ℃.
When T is Environment initiation When the temperature is more than or equal to 20 ℃, the probability of frosting of the indoor unit and the frosting speed are very small when the air conditioner operates in a refrigerating mode. Thus, inWhen the defrosting control is performed, the temperature of the evaporator coil can be used as a detection core to perform the defrosting control, and the first preset temperature difference can be set relatively large, for example, the first preset temperature difference can be 3 ℃.
And S1402, if the initial outdoor environment temperature is smaller than the first set temperature and larger than or equal to the second set temperature, performing defrosting control on the air conditioner according to the relation among the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the change value of the outdoor environment temperature and the second preset temperature difference.
In this embodiment, the second set temperature and the second preset temperature difference are set by the technician according to experience, and the second set temperature is smaller than the first set temperature, for example, the second set temperature is 10 ℃.
When the temperature is 20 DEG C>T Environment initiation When the temperature is more than or equal to 10 ℃, the frosting probability of the air conditioner operating in the refrigerating mode is higher, and the frosting speed is also higher. Thus, the second preset temperature difference may be set to a value smaller than the first preset temperature difference, for example, the second preset temperature difference may be 2 ℃.
S1403, if the initial outdoor environment temperature is smaller than the second set temperature, performing defrosting control on the air conditioner according to the relationship among the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and the third preset temperature difference.
In this embodiment, when 10 DEG C>T Environment initiation When the air conditioner operates in the refrigerating mode, the indoor unit is characterized by high frosting probability and high frosting speed. Thus, the third preset temperature difference may be set to a value smaller than the second preset temperature difference, for example, the second preset temperature difference is 2 ℃, and the third preset temperature difference is 1 ℃.
Alternatively, step S1401 may include the following detailed steps S211 to S214.
S211, comparing the attenuation degree of the temperature of the evaporator coil with a first preset temperature difference.
And S212, if the attenuation degree of the temperature of the evaporator coil is larger than the first preset temperature difference, increasing the current rotating speed of the indoor fan by the first preset rotating speed, and comparing the attenuation degree of the air outlet temperature of the indoor unit with the first preset temperature difference after the first set time length.
In this embodiment, the first preset rotational speed and the first set duration are set by a technician according to experience, for example, the first preset rotational speed may be 50r/min, and the first set duration is 30min.
T Coil pipe attenuation >At 3 ℃, the evaporator characterizing the air conditioner may be frosting, however, due to T Environment initiation At the temperature of more than or equal to 20 ℃, the frosting speed is lower, and the current rotating speed of the indoor fan can be increased by 50r/min, so that the heat exchange air quantity of the indoor unit is improved, and the frosting speed of the air conditioner is reduced. And after 30min, the T is aligned Air-out attenuation And 3 ℃ to judge the frosting speed of the evaporator and whether the rotating speed of the indoor fan needs to be adjusted.
And S213, if the attenuation degree of the air outlet temperature of the indoor unit is larger than the first preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the first preset rotating speed, and comparing the change value of the outdoor environment temperature with the first preset temperature difference after the first set time length.
If T Air-out attenuation >The evaporator of the air conditioner is still in a frosting state at the temperature of 3 ℃, and at the moment, the current rotating speed of the indoor fan can be continuously increased by 50r/min to improve the heat exchange air quantity of the indoor unit and reduce the frosting speed of the air conditioner. And after 30min, the T is aligned Environmental change And 3 ℃, judging whether the evaporator is full of frost, and defrosting under the condition of full frost.
And S214, if the change value of the outdoor environment temperature is larger than the first preset temperature difference, controlling the air conditioner to defrost.
In the present embodiment, if T Environmental change >And controlling the compressor and the indoor fan to stop running at 3 ℃ and controlling the outdoor fan to maintain the current speed to continue running so as to defrost the air conditioner.
Optionally, step S1401 may further include steps S215 to S217 described below.
And S215, if the attenuation degree of the temperature of the evaporator coil is not greater than the first preset temperature difference, controlling the air conditioner to operate with the current parameters, and returning to execute the step S211 after the first set time.
And S216, if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the first preset temperature difference, controlling the air conditioner to operate with the current parameters, and after a first set period of time, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the first preset temperature difference in the step S212.
S217, if the change value of the outdoor environment temperature is not greater than the first preset temperature difference, the air conditioner is controlled to operate with the current parameter, and after a first set period of time, the step of comparing the change value of the outdoor environment temperature with the first preset temperature difference is returned to the step of executing in the step S213.
Optionally, step S1402 may include the following detailed steps S311-S314.
S311, comparing the attenuation degree of the temperature of the evaporator coil with a second preset temperature difference.
S312, if the attenuation degree of the temperature of the evaporator coil is larger than the second preset temperature difference, the current rotating speed of the indoor fan is increased by the second preset rotating speed, and after the second set time length, the attenuation degree of the air outlet temperature of the indoor unit is compared with the second preset temperature difference.
In this embodiment, the second preset rotational speed and the second set period are empirically set by a technician. Due to 20 DEG C>T Environment initiation The frosting speed of the evaporator of the air conditioner may be higher than or equal to 10 ℃, the second preset rotating speed may be set to be higher than the first preset rotating speed, the second set duration is shorter than the first set duration, for example, the second preset rotating speed may be 100r/min, and the second set duration may be 20min.
Namely, when 20 DEG C>T Environment initiation If T is not less than 10 DEG C Coil pipe attenuation >2 ℃, the current rotating speed of the indoor fan is increased by 100r/min, and after 20min, the T is compared Air-out attenuation And 2 ℃ to judge the frosting speed of the evaporator and whether the rotating speed of the indoor fan needs to be adjusted.
S313, if the attenuation degree of the air outlet temperature of the indoor unit is larger than the second preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the second preset rotating speed, and comparing the change value of the outdoor environment temperature with the second preset temperature difference after the second set time length.
In the present embodiment, if T Air-out attenuation >2 ℃, continuously increasing the current rotating speed of the indoor fan by 100r/min, and comparing T after 20min Environmental change And 2 ℃, judging whether the evaporator is full of frost, and defrosting under the condition of full frost.
And S314, if the change value of the outdoor environment temperature is larger than the second preset temperature difference, controlling the air conditioner to defrost.
In the present embodiment, if T Environmental change >And controlling the compressor and the indoor fan to stop running at the temperature of 2 ℃ and controlling the outdoor fan to maintain the current speed to continue running so as to defrost the air conditioner.
Optionally, when the air conditioner is not frosted, the air conditioner is controlled to operate according to the current parameters. Thus, step S1402 may further include steps S315-S317 described below.
And S315, if the attenuation degree of the temperature of the evaporator coil is not greater than the second preset temperature difference, controlling the air conditioner to operate according to the current parameters.
S316, if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the second preset temperature difference, controlling the air conditioner to operate according to the current parameters, and after the second set time length, returning to execute the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the second preset temperature difference.
And S317, if the change value of the outdoor environment temperature is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameter, and after a second set time period, returning to the step of comparing the change value of the outdoor environment temperature with the second preset temperature difference.
Alternatively, step S1403 may include steps S411 to S414 described below.
S411, comparing the attenuation degree of the temperature of the evaporator coil with a third preset temperature difference.
And S412, if the attenuation degree of the temperature of the evaporator coil is larger than the third preset temperature difference, increasing the current rotating speed of the indoor fan by the third preset rotating speed, and comparing the attenuation degree of the air outlet temperature of the indoor unit with the third preset temperature difference after the third set time length.
In the present practiceIn an embodiment, the third preset rotational speed and the third set duration are empirically set by a technician. Due to 10deg.C>T Environment initiation The frosting speed of the evaporator of the air conditioner is sharply increased, the third preset rotating speed can be set to be higher than the second preset rotating speed, the third set time period is shorter than the second set time period, for example, the second preset rotating speed can be 150r/min, and the second set time period can be 10min.
I.e. when 10 DEG C>T Environment initiation If T Coil pipe attenuation >The current rotating speed of the indoor fan is increased by 150r/min at 1 ℃, and after 10min, the T is compared Air-out attenuation And 1 ℃ to judge the frosting speed of the evaporator and whether the rotating speed of the indoor fan needs to be adjusted.
S413, if the attenuation degree of the air outlet temperature of the indoor unit is larger than the third preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the third preset rotating speed, and comparing the change value of the outdoor environment temperature with the third preset temperature difference after the third set time length.
In the present embodiment, if T Air-out attenuation >The current rotating speed of the indoor fan is continuously increased by 150r/min at the temperature of 1 ℃, and after 10min, the T is compared Environmental change And 1 ℃, judging whether the evaporator is full of frost, and defrosting under the condition of full frost.
And S414, if the change value of the outdoor environment temperature is larger than the third preset temperature difference, controlling the air conditioner to defrost.
In the present embodiment, if T Environmental change >And controlling the compressor and the indoor fan to stop running at the temperature of 1 ℃ and controlling the outdoor fan to maintain the current speed to continue running so as to defrost the air conditioner.
Optionally, when the air conditioner is not frosted, the air conditioner is controlled to operate according to the current parameters. Thus, step S1403 may also include steps S415-S417, described below, in parallel with steps S411-S414.
And S415, if the attenuation degree of the temperature of the evaporator coil is not greater than the third preset temperature difference, controlling the air conditioner to operate according to the current parameters.
And S416, if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the third preset temperature difference, controlling the air conditioner to operate according to the current parameters, and after a third set time length, returning to execute the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the third preset temperature difference.
S417, if the change value of the outdoor environment temperature is not greater than the third preset temperature difference, the air conditioner is controlled to operate with the current parameter, and after the third set time period, the step of comparing the change value of the outdoor environment temperature with the third preset temperature difference is performed in a returning mode.
Further, for better illustrating the embodiments of the present invention, the embodiments of the present invention are described below by way of an application example shown in fig. 3. Assuming that the first set temperature is 20 ℃ and the second set temperature is 10 ℃; the first preset temperature difference is 3 ℃, the second preset temperature difference is 2 ℃, and the third preset temperature difference is 1 ℃; the first set time length is 30min, the second set time length is 20min, and the third set time length is 10min; the first preset rotating speed is 50r/min, the second preset rotating speed is 100r/min, and the third preset rotating speed is 150r/min.
As shown in fig. 3, the defrosting control method provided by the embodiment of the invention may include the following procedures:
s11, detecting the temperature T of the inner disc of the initial evaporator after the air conditioner operates for 30min Inner disk initiation Initial indoor unit air outlet temperature T Initial air-out And an initial outdoor ambient temperature T Environment initiation 。
S12, detecting the temperature of the evaporator coil, the air outlet temperature of the initial indoor unit and the outdoor environment temperature every 10min to obtain T respectively The inner disk is at present, T Air outlet current And T Environment is currently 。
S13, respectively calculating the attenuation temperature of the inner disc of the evaporator: t (T) Inner disk attenuation ＝T Inner disk initiation- T Inner disc operation Indoor set air-out attenuation degree: t (T) Air-out attenuation ＝T Initial air outlet T Air-out operation And outdoor environment change value: t (T) Environmental change ＝T Environment initiation -T Environment operation 。
S21, when T Environment initiation Judging T when the temperature is more than or equal to 20 DEG C Inner disk attenuation Whether or not it is greater than 3 ℃.
S22, if T Inner disk attenuation >The rotating speed of the indoor fan is increased by 50r/min at 3 ℃; if T Inner disk attenuation And if the temperature is less than or equal to 3 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S21 after 30 minutes.
S23, after 30min, judging T Air-out attenuation Whether or not it is greater than 3 ℃.
S24, if T Air-out attenuation >The rotating speed of the indoor fan is increased by 50r/min at 3 ℃; if T Air-out attenuation And if the temperature is less than or equal to 3 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S23 after 30 minutes.
S25, after 30min, judging T Environmental change Whether or not it is greater than 3 ℃.
S26, if T Environmental change >Controlling the compressor to stop running and the indoor fan to stop running at 3 ℃; if T Environmental change And if the temperature is less than or equal to 3 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S25 after 30 minutes.
S31, when 20 DEG C>T Environment initiation Judging T when the temperature is not less than 10 DEG C Inner disk attenuation Whether or not it is greater than 2 ℃.
S32, if T Inner disk attenuation >2 ℃, the rotating speed of the indoor fan is increased by 100r/min; if T Inner disk attenuation And controlling the air conditioner to continue to operate according to the current parameters at the temperature of less than or equal to 2 ℃, and returning to execute the step S31 after 20 minutes.
S33, after 20min, judging T Air-out attenuation Whether or not it is greater than 2 ℃.
S34, if T Air-out attenuation >2 ℃, the rotating speed of the indoor fan is increased by 100r/min; if T Air-out attenuation And if the temperature is less than or equal to 2 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S33 after 20 minutes.
S35, after 20min, judging T Environmental change Whether or not it is greater than 2 ℃.
S36, if T Environmental change >Controlling the compressor to stop running and the indoor fan to stop running at the temperature of 2 ℃; if T Environmental change If the temperature is less than or equal to 2 ℃, the air conditioner is controlled to continue to operate according to the current parameters, andafter 20min, the process returns to step S35.
S41, when T Environment initiation <At 10 ℃, judge T Inner disk attenuation Whether or not it is greater than 1 ℃.
S42, if T Inner disk attenuation >The rotating speed of the indoor fan is increased by 150r/min at the temperature of 1 ℃; if T Inner disk attenuation And if the temperature is less than or equal to 1 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S41 after 10 minutes.
S43, after 10min, judging T Air-out attenuation Whether or not it is greater than 1 ℃.
S44, if T Air-out attenuation >The rotating speed of the indoor fan is increased by 150r/min at the temperature of 1 ℃; if T Air-out attenuation And if the temperature is less than or equal to 1 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S43 after 10 minutes.
S45, after 10min, judging T Environmental change Whether or not it is greater than 1 ℃.
S46, if T Environmental change >Controlling the compressor to stop running and the indoor fan to stop running at the temperature of 1 ℃; if T Environmental change And if the temperature is less than or equal to 1 ℃, controlling the air conditioner to continue to operate according to the current parameters, and returning to execute the step S45 after 10 minutes.
Compared with the prior art, the embodiment has the following beneficial effects:
firstly, according to the defrosting control method provided by the embodiment, through adding the indoor unit air outlet temperature sensing bulb and the outdoor environment temperature sensing bulb to the air conditioner, the problem that in the prior art, the temperature of the evaporator coil is rapidly reduced due to the change of the outdoor environment temperature, so that the air conditioner is subjected to defrosting control by mistake is solved. Because the temperature of the evaporator coil, the air outlet temperature of the indoor unit and the outdoor environment temperature are comprehensively considered, defrosting control is more accurate.
Then, the defrosting control method provided by the embodiment of the invention installs the sleeve on the bent pipe of the evaporator, and installs the evaporator coil temperature sensing package in the sleeve, so that the problem that the detected temperature of the evaporator coil is inaccurate due to the fact that the inner disc temperature sensing package is installed on the evaporator in a spot welding mode in the prior art is solved, and the detected temperature of the evaporator coil is more accurate.
And finally, considering the influence of the ambient temperature on the frosting speed of the air conditioner, setting corresponding temperature differences and the rotating speed of the indoor fan according to different outdoor ambient temperature ranges, so that the frosting control is more accurate.
In order to implement the steps of the above-mentioned defrosting control method, the present embodiment further provides a defrosting control device 200, referring to fig. 4, the defrosting control device 200 includes: a detection module 201, a calculation module 202 and a control module 203.
A detection module 201, configured to:
when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature;
and detecting the current temperature of the evaporator coil, the current air outlet temperature of the indoor unit and the current outdoor environment temperature according to preset time intervals.
The calculation module 202 is configured to calculate the difference between the initial evaporator coil temperature and the current evaporator coil temperature, the initial indoor unit air-out temperature and the current indoor unit air-out temperature, and the initial outdoor environment temperature and the current outdoor environment temperature, respectively, to obtain a attenuation degree of the evaporator coil temperature, a attenuation degree of the indoor unit air-out temperature, and a variation value of the outdoor environment temperature.
And the control module 203 is configured to perform defrosting control on the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air outlet temperature, and the variation value of the outdoor environment temperature.
Optionally, the control module 203 is further configured to:
if the initial outdoor environment temperature is greater than or equal to a first set temperature, performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a first preset temperature difference;
if the initial outdoor environment temperature is smaller than the first set temperature and larger than or equal to the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a second preset temperature difference;
if the initial outdoor environment temperature is smaller than the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a third preset temperature difference;
the first preset temperature difference is larger than the second preset temperature difference, and the second preset temperature difference is larger than the third preset temperature difference.
Optionally, the control module 203 is further configured to:
comparing the attenuation degree of the temperature of the evaporator coil with the first preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the first preset temperature difference, the current rotating speed of the indoor fan is increased by a first preset rotating speed, and after a first set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the first preset temperature difference;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the first preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the first preset rotating speed, and comparing the change value of the outdoor environment temperature with the first preset temperature difference after the first set time length;
and if the change value of the outdoor environment temperature is larger than the first preset temperature difference, controlling the air conditioner to defrost.
Optionally, the control module 203 is further configured to:
if the attenuation degree of the temperature of the evaporator coil is not greater than the first preset temperature difference, controlling the air conditioner to operate according to the current parameters;
if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the first preset temperature difference, controlling the air conditioner to operate with current parameters, and after the first set duration, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the first preset temperature difference;
And if the change value of the outdoor environment temperature is not greater than the first preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the first set time length, returning to the step of comparing the change value of the outdoor environment temperature with the first preset temperature difference.
Optionally, the control module 203 is further configured to:
comparing the attenuation degree of the temperature of the evaporator coil with the second preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the second preset temperature difference, the current rotating speed of the indoor fan is increased by a second preset rotating speed, and after a second set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the second preset temperature difference;
the second preset rotating speed is higher than the first preset rotating speed, and the second set duration is shorter than the first set duration;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the second preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the second preset rotating speed, and comparing the change value of the outdoor environment temperature with the second preset temperature difference after the second set time length;
and if the change value of the outdoor environment temperature is larger than the second preset temperature difference, controlling the air conditioner to defrost.
Optionally, the control module 203 is further configured to:
if the attenuation degree of the temperature of the evaporator coil is not greater than the second preset temperature difference, controlling the air conditioner to operate according to the current parameters;
if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameters, and after the second set time length, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the second preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the second set time length, returning to the step of comparing the change value of the outdoor environment temperature with the second preset temperature difference.
Optionally, the control module 203 is further configured to:
comparing the attenuation degree of the temperature of the evaporator coil with the third preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the third preset temperature difference, the current rotating speed of the indoor fan is increased by the third preset rotating speed, and after a third set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the third preset temperature difference;
The third preset rotating speed is higher than the second preset rotating speed, and the third set duration is shorter than the second set duration;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the third preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the third preset rotating speed, and comparing the change value of the outdoor environment temperature with the third preset temperature difference after the third set time length;
and if the change value of the outdoor environment temperature is larger than the third preset temperature difference, controlling the air conditioner to defrost.
Optionally, the control module 203 is further configured to:
if the attenuation degree of the temperature of the evaporator coil is not greater than the third preset temperature difference, controlling the air conditioner to operate according to the current parameters;
if the attenuation degree of the air outlet temperature of the indoor unit is not greater than the third preset temperature difference, controlling the air conditioner to operate with current parameters, and after the third set duration, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the third preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the third preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the third set time length, returning to the step of comparing the change value of the outdoor environment temperature with the third preset temperature difference.
It will be apparent to those skilled in the art that the specific operation of the defrosting control device 200 is described above for convenience and brevity. Reference may be made to the corresponding procedure in the foregoing method embodiments, and no further description is given here.
The embodiment also provides an air conditioner for implementing the above defrosting control method, please refer to fig. 5, fig. 5 shows a block schematic diagram of an air conditioner 100 provided in the embodiment. The air conditioner 100 includes a memory 101, a processor 102, an evaporator coil temperature sensing bulb 103, an indoor unit outlet temperature sensing bulb 104, and an outdoor ambient temperature sensing bulb 105. The memory 101, the evaporator coil temperature sensing bulb 103, the indoor unit outlet temperature sensing bulb 104 and the outdoor environment temperature sensing bulb 105 are all connected to the processor 102. By way of example, the air conditioner 100 may also include program instructions stored in ROM, RAM, or other types of non-transitory storage media, or any combination thereof. The method of the present invention may be implemented in accordance with these program instructions.
The memory 101 is used to store programs such as the defrosting control device 200. The defrosting control device 200 includes at least one software function module that may be stored in the memory 101 in the form of software or firmware (firmware), and the processor 102 executes the program to implement the defrosting control method in this embodiment after receiving an execution instruction.
The Memory 101 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-OnlyMemory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.
The processor 102 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the defrosting control method in the present embodiment may be completed by an integrated logic circuit of hardware in the processor 102 or an instruction in the form of software. The processor 102 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a micro control unit (Microcontroller Unit, MCU), a complex programmable logic device (Complex Programmable Logic Device, CPLD), a field programmable gate array (Field Programmable Gate Array, FPGA), an embedded ARM, and the like.
For ease of illustration, only one processor is depicted in the air conditioner 100. It should be noted, however, that the air conditioner 100 of the present invention may also include a plurality of processors, and thus the steps performed by one processor described in the present invention may also be performed by a plurality of processors in combination or separately. For example, if the processors of the air conditioner 100 perform the steps a and B, it should be understood that the steps a and B may be performed by two different processors together or performed separately in one processor. For example, the first processor performs step a, the second processor performs step B, or the first processor and the second processor together perform steps a and B.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by the processor 102, implements the defrosting control method disclosed in the above embodiment.
In summary, the embodiment of the invention provides a defrosting control method, a defrosting control device and an air conditioner, wherein the method comprises the following steps: firstly, when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature, and detecting the current evaporator coil temperature, the current indoor unit temperature and the current outdoor environment temperature according to a preset time interval. And then, respectively calculating the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature, and performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature. As the judgment temperature of the evaporator, the air outlet temperature of the indoor unit and the outdoor environment temperature are integrated, the defrosting control is more accurate.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A defrosting control method, characterized by comprising:
when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature, wherein the air conditioner is operated in a refrigeration mode;
detecting the current temperature of the evaporator coil, the current air outlet temperature of the indoor unit and the current outdoor environment temperature according to preset time intervals;
respectively calculating the initial evaporator coil temperature and the current evaporator coil temperature, the initial indoor unit air-out temperature and the current indoor unit air-out temperature, and the initial outdoor environment temperature and the current outdoor environment temperature to obtain the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air-out temperature and the change value of the outdoor environment temperature;
performing defrosting control on the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature;
the step of performing defrosting control on the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature comprises the following steps:
If the initial outdoor environment temperature is greater than or equal to a first set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a first preset temperature difference;
if the initial outdoor environment temperature is smaller than the first set temperature and larger than or equal to the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a second preset temperature difference;
if the initial outdoor environment temperature is smaller than the second set temperature, defrosting the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a third preset temperature difference;
wherein the first preset temperature difference is greater than the second preset temperature difference, which is greater than the third preset temperature difference;
the step of defrosting control for the air conditioner according to the relation among the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and the first preset temperature difference comprises the following steps:
Comparing the attenuation degree of the temperature of the evaporator coil with the first preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the first preset temperature difference, the current rotating speed of the indoor fan is increased by a first preset rotating speed, and after a first set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the first preset temperature difference;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the first preset temperature difference, continuously increasing the current rotation speed of the indoor fan by the first preset rotation speed, and comparing the change value of the outdoor environment temperature with the first preset temperature difference after the first set time length;
if the change value of the outdoor environment temperature is larger than the first preset temperature difference, controlling the air conditioner to defrost;
the step of defrosting control for the air conditioner according to the relation among the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and the second preset temperature difference comprises the following steps:
comparing the attenuation degree of the temperature of the evaporator coil with the second preset temperature difference;
if the attenuation degree of the temperature of the evaporator coil is larger than the second preset temperature difference, the current rotation speed of the indoor fan is increased by a second preset rotation speed, and after a second set time length, the attenuation degree of the air outlet temperature of the indoor unit is compared with the second preset temperature difference;
The second preset rotating speed is higher than the first preset rotating speed, and the second set duration is shorter than the first set duration;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the second preset temperature difference, continuously increasing the current rotation speed of the indoor fan by the second preset rotation speed, and comparing the change value of the outdoor environment temperature with the second preset temperature difference after the second set time length;
if the change value of the outdoor environment temperature is larger than the second preset temperature difference, controlling the air conditioner to defrost;
the step of defrosting control for the air conditioner according to the relation among the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the variation value of the outdoor environment temperature and a third preset temperature difference comprises the following steps:
comparing the attenuation degree of the temperature of the evaporator coil with the third preset temperature difference; if the attenuation degree of the temperature of the evaporator coil is larger than the third preset temperature difference, the current rotating speed of the indoor fan is increased by the third preset rotating speed, and after a third set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the third preset temperature difference;
The third preset rotating speed is higher than the second preset rotating speed, and the third set duration is shorter than the second set duration;
if the attenuation degree of the air outlet temperature of the indoor unit is larger than the third preset temperature difference, continuously increasing the current rotation speed of the indoor fan by the third preset rotation speed, and comparing the change value of the outdoor environment temperature with the third preset temperature difference after the third set time length;
and if the change value of the outdoor environment temperature is larger than the third preset temperature difference, controlling the air conditioner to defrost.
2. The defrosting control method according to claim 1, wherein the step of controlling the air conditioner to defrost according to a relationship between a degree of decay of the evaporator coil temperature, a degree of decay of the indoor unit outlet air temperature, and a variation value of the outdoor ambient temperature and a first preset temperature difference, further comprises:
if the attenuation degree of the temperature of the evaporator coil is not greater than the first preset temperature difference, controlling the air conditioner to operate with current parameters, and after the first set time length, returning to the step of comparing the attenuation degree of the temperature of the evaporator coil with the first preset temperature difference;
If the attenuation degree of the air outlet temperature of the indoor unit is not greater than the first preset temperature difference, controlling the air conditioner to operate with current parameters, and after the first set duration, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the first preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the first preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the first set time length, returning to the step of comparing the change value of the outdoor environment temperature with the first preset temperature difference.
3. The defrosting control method according to claim 2, wherein the step of controlling the air conditioner to defrost according to the relationship between the degree of decay of the evaporator coil temperature, the degree of decay of the indoor unit outlet air temperature, and the change value of the outdoor ambient temperature and a second preset temperature difference, further comprises:
if the attenuation degree of the temperature of the evaporator coil is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameters, and after the second set time length, returning to the step of comparing the attenuation degree of the temperature of the evaporator coil with the second preset temperature difference;
If the attenuation degree of the air outlet temperature of the indoor unit is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameters, and after the second set time length, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the second preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the second preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the second set time length, returning to the step of comparing the change value of the outdoor environment temperature with the second preset temperature difference.
4. The defrosting control method of claim 3, wherein the step of controlling the air conditioner to defrost according to a relationship between a degree of decay of the evaporator coil temperature, a degree of decay of the indoor unit outlet air temperature, and a variation value of the outdoor ambient temperature and a third preset temperature difference, further comprises:
if the attenuation degree of the temperature of the evaporator coil is not greater than the third preset temperature difference, controlling the air conditioner to operate with current parameters, and after the third set time length, returning to the step of comparing the attenuation degree of the temperature of the evaporator coil with the third preset temperature difference;
If the attenuation degree of the air outlet temperature of the indoor unit is not greater than the third preset temperature difference, controlling the air conditioner to operate with current parameters, and after the third set duration, returning to the step of comparing the attenuation degree of the air outlet temperature of the indoor unit with the third preset temperature difference;
and if the change value of the outdoor environment temperature is not greater than the third preset temperature difference, controlling the air conditioner to operate with the current parameter, and after the third set time length, returning to the step of comparing the change value of the outdoor environment temperature with the third preset temperature difference.
5. A defrosting control device, characterized by comprising:
the detection module is used for:
when the air conditioner is started and operated for a set period of time, detecting the initial evaporator coil temperature, the initial indoor unit air outlet temperature and the initial outdoor environment temperature, wherein the air conditioner is operated in a refrigeration mode; detecting the current temperature of the evaporator coil, the current air outlet temperature of the indoor unit and the current outdoor environment temperature according to preset time intervals;
the calculation module is used for respectively calculating the initial evaporator coil temperature and the current evaporator coil temperature, the initial indoor unit air-out temperature and the current indoor unit air-out temperature, the initial outdoor environment temperature and the current outdoor environment temperature to obtain the attenuation degree of the evaporator coil temperature, the attenuation degree of the indoor unit air-out temperature and the change value of the outdoor environment temperature;
The control module is used for performing defrosting control on the air conditioner according to the initial outdoor environment temperature, the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the change value of the outdoor environment temperature;
the control module is specifically used for: if the initial outdoor environment temperature is greater than or equal to a first set temperature, performing defrosting control on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a first preset temperature difference; if the initial outdoor environment temperature is smaller than the first set temperature and larger than or equal to the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a second preset temperature difference; if the initial outdoor environment temperature is smaller than the second set temperature, defrosting control is carried out on the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit and the relation between the change value of the outdoor environment temperature and a third preset temperature difference; wherein the first preset temperature difference is greater than the second preset temperature difference, which is greater than the third preset temperature difference;
The control module is used for controlling defrosting of the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the relation between the change value of the outdoor environment temperature and a first preset temperature difference, and is specifically used for: comparing the attenuation degree of the temperature of the evaporator coil with the first preset temperature difference; if the attenuation degree of the temperature of the evaporator coil is larger than the first preset temperature difference, the current rotating speed of the indoor fan is increased by a first preset rotating speed, and after a first set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the first preset temperature difference; if the attenuation degree of the air outlet temperature of the indoor unit is larger than the first preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the first preset rotating speed, and comparing the change value of the outdoor environment temperature with the first preset temperature difference after the first set time length; if the change value of the outdoor environment temperature is larger than the first preset temperature difference, controlling the air conditioner to defrost;
the control module is used for controlling defrosting of the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the relation between the change value of the outdoor environment temperature and a second preset temperature difference, and is specifically used for: comparing the attenuation degree of the temperature of the evaporator coil with the second preset temperature difference; if the attenuation degree of the temperature of the evaporator coil is larger than the second preset temperature difference, the current rotating speed of the indoor fan is increased by a second preset rotating speed, and after a second set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the second preset temperature difference; the second preset rotating speed is higher than the first preset rotating speed, and the second set duration is shorter than the first set duration; if the attenuation degree of the air outlet temperature of the indoor unit is larger than the second preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the second preset rotating speed, and comparing the change value of the outdoor environment temperature with the second preset temperature difference after the second set time length; if the change value of the outdoor environment temperature is larger than the second preset temperature difference, controlling the air conditioner to defrost;
The control module is used for controlling defrosting of the air conditioner according to the attenuation degree of the temperature of the evaporator coil, the attenuation degree of the air outlet temperature of the indoor unit, the relation between the change value of the outdoor environment temperature and a third preset temperature difference, and is specifically used for: comparing the attenuation degree of the temperature of the evaporator coil with the third preset temperature difference; if the attenuation degree of the temperature of the evaporator coil is larger than the third preset temperature difference, the current rotating speed of the indoor fan is increased by the third preset rotating speed, and after a third set duration, the attenuation degree of the air outlet temperature of the indoor unit is compared with the third preset temperature difference; the third preset rotating speed is higher than the second preset rotating speed, and the third set duration is shorter than the second set duration; if the attenuation degree of the air outlet temperature of the indoor unit is larger than the third preset temperature difference, continuously increasing the current rotating speed of the indoor fan by the third preset rotating speed, and comparing the change value of the outdoor environment temperature with the third preset temperature difference after the third set time length; and if the change value of the outdoor environment temperature is larger than the third preset temperature difference, controlling the air conditioner to defrost.
6. An air conditioner, characterized in that the air conditioner comprises: one or more processors; a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the defrosting control method of any one of claims 1-4.
CN202210953781.0A 2022-08-10 2022-08-10 Defrosting control method and device and air conditioner Active CN115076905B (en)

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