CN111692707A - Defrosting control method and device for air conditioner external unit, storage medium and air conditioner - Google Patents

Defrosting control method and device for air conditioner external unit, storage medium and air conditioner Download PDF

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Publication number
CN111692707A
CN111692707A CN202010514053.0A CN202010514053A CN111692707A CN 111692707 A CN111692707 A CN 111692707A CN 202010514053 A CN202010514053 A CN 202010514053A CN 111692707 A CN111692707 A CN 111692707A
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CN
China
Prior art keywords
outdoor
humidity
preset
defrosting
air conditioner
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Pending
Application number
CN202010514053.0A
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Chinese (zh)
Inventor
杨航
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
Original Assignee
Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Application filed by Aux Air Conditioning Co Ltd, Ningbo Aux Electric Co Ltd filed Critical Aux Air Conditioning Co Ltd
Priority to CN202010514053.0A priority Critical patent/CN111692707A/en
Publication of CN111692707A publication Critical patent/CN111692707A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F24F2110/22—Humidity of the outside air

Abstract

The invention provides a defrosting control method and device for an air conditioner external unit, a storage medium and an air conditioner, which relate to the technical field of air conditioners and comprise the following steps: acquiring outdoor temperature and outdoor humidity; controlling an outdoor unit to execute a defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls; the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation. The invention determines whether to control the outdoor unit to defrost or not by judging the conditions of the outdoor temperature and the outdoor humidity, and performs defrosting to the outdoor unit in different degrees through different sections of the outdoor humidity on the premise that the outdoor temperature and the outdoor humidity are in certain conditions, and the factors of the outdoor temperature and the outdoor humidity are comprehensively considered, so that the outdoor unit is prevented from frosting.

Description

Defrosting control method and device for air conditioner external unit, storage medium and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device for an air conditioner external unit, a storage medium and an air conditioner.
Background
In the prior art, the defrosting judgment of the outdoor unit mostly depends on the temperature of the outer tray to judge whether to enter the defrosting program, for example, the defrosting program is started when the temperature of the outer tray is less than or equal to the preset temperature. In the actual use process, the humidity of the environment where the outdoor unit is located has a great influence on the frosting of the outdoor unit, and when the humidity of the environment where the outdoor unit is located is higher, the frosting speed of the outdoor unit is higher. Therefore, when the humidity of the environment where the outdoor unit is located is high, the frosting speed is increased, the defrosting period is shortened, defrosting is frequently performed, and the air conditioning experience is poor.
Disclosure of Invention
The invention solves the problems that when the humidity of the environment where the outdoor unit is located is higher, the frosting speed is accelerated, the defrosting period is shortened, defrosting is frequently carried out, and the air conditioning experience is poor.
In order to solve the above problems, the present invention provides a defrosting control method for an air conditioner external unit, including:
acquiring outdoor temperature and outdoor humidity;
controlling an outdoor unit to execute a defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls;
the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation.
The invention determines whether to control the outdoor unit to defrost or not by judging the conditions of the outdoor temperature and the outdoor humidity, and performs defrosting to the outdoor unit in different degrees through different sections of the outdoor humidity on the premise that the outdoor temperature and the outdoor humidity are in certain conditions, and the factors of the outdoor temperature and the outdoor humidity are comprehensively considered, so that the outdoor unit is prevented from frosting.
Optionally, the controlling the outdoor unit to execute the defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls includes:
judging whether the outdoor temperature is less than or equal to a preset temperature value and whether the outdoor humidity is greater than or equal to a preset humidity value:
if yes, controlling the outdoor unit to execute a defrosting mode according to a preset humidity interval in which the outdoor humidity falls;
and if not, acquiring the outdoor temperature and the outdoor humidity again, and controlling the outdoor unit to execute the defrosting mode according to the preset humidity interval in which the acquired outdoor temperature, the acquired outdoor humidity and the acquired outdoor humidity fall.
Whether defrosting is needed or not is judged again through whether the defrosting is needed or not falling into a preset humidity interval, and the judgment is more accurate.
Optionally, the controlling the outdoor unit to execute the defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls includes:
judging whether the outdoor temperature is less than or equal to a preset temperature value, whether the outdoor humidity is greater than or equal to a preset humidity value, and whether the duration of the outdoor temperature is less than or equal to the preset temperature value and the duration of the outdoor humidity is greater than or equal to the preset humidity value is greater than a fourth duration:
if yes, controlling the outdoor unit to execute a defrosting mode according to a preset humidity interval in which the outdoor humidity falls;
and if not, re-acquiring the outdoor temperature and the outdoor humidity, and controlling the outdoor unit to execute defrosting mode judgment according to the re-acquired outdoor temperature, the re-acquired outdoor humidity and a preset humidity interval in which the re-acquired outdoor humidity falls.
Whether defrosting is needed or not is judged by whether the defrosting preset condition is met or not, and the condition is met and the defrosting lasts for a certain time, so that parameter errors of single time or short time caused by unstable operation of the air conditioner are eliminated, and the judgment is more accurate.
Optionally, the controlling the outdoor unit to execute the defrosting mode according to the preset humidity interval in which the outdoor humidity falls includes:
the preset humidity interval is divided into a plurality of preset humidity subintervals, each preset humidity subinterval corresponds to a first adjusting value, the first adjusting value comprises one or more of the rotating speed of an external fan, the frequency of a compressor and the opening degree of an expansion valve, and the absolute value of the first adjusting value is positively correlated with the size of the preset humidity subintervals;
judging whether the outdoor humidity is in the preset humidity interval:
if yes, acquiring the first adjustment value corresponding to the preset humidity subinterval according to the preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval, and controlling the outdoor unit to defrost according to the first adjustment value;
and if not, acquiring the outdoor temperature and the outdoor humidity again, and controlling the outdoor unit to execute the defrosting mode according to the preset humidity interval in which the acquired outdoor temperature, the acquired outdoor humidity and the acquired outdoor humidity fall.
The outdoor unit is controlled to execute the defrosting mode through the preset humidity space with the falling outdoor humidity, different defrosting controls are carried out according to different humidity conditions, the control process is more accurate, and the influence of the defrosting mode on the refrigerating or heating effect of the air conditioner is reduced as much as possible.
Optionally, the method further comprises:
and acquiring a defrosting cycle of the air conditioner, and controlling the outdoor unit to execute a defrosting mode according to the defrosting cycle when the outdoor unit is controlled to execute the defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls.
When the outdoor humidity is higher than a certain value, the frosting period of the air conditioner is shortened theoretically; the moisture content of the air in the environment of the outdoor unit is increased, and moisture in the air is more likely to condense in the pipeline, so that the frosting speed is increased, and the frosting frequency is increased, for example: the conventional defrosting function is operated for 2 times in 2 hours at the humidity, the defrosting function is operated for 4 times in 2 hours at the higher humidity, the heating effect of the indoor unit is reduced during the defrosting process, and the experience is poor. However, the condition that the outdoor humidity is high but the defrosting period is in a normal range exists, and the method adopts two factors to judge whether to enter the defrosting mode, so that the judgment is more accurate.
Optionally, when the outdoor unit is controlled to execute the defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls, simultaneously controlling the outdoor unit to execute the defrosting mode according to the defrosting cycle includes:
judging whether the defrosting period is smaller than a preset period value or not and whether the outdoor humidity is in the preset humidity interval or not,
if yes, acquiring the first adjustment value corresponding to the preset humidity subinterval according to the preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval, and controlling the outdoor unit to defrost according to the first adjustment value;
and if not, re-acquiring the outdoor temperature, the outdoor humidity and the defrosting period, and controlling the outdoor unit to execute the defrosting mode according to the re-acquired outdoor temperature, the re-acquired outdoor humidity, a preset humidity subinterval in which the re-acquired outdoor humidity falls into the preset humidity interval and the re-acquired defrosting period.
Whether the defrosting mode is started or not is judged according to three factors including outdoor temperature, outdoor humidity and defrosting period, defrosting control in different degrees is carried out according to different outdoor humidity, judgment is more accurate, and control is more reasonable.
Optionally, the method further comprises: when the outdoor unit is controlled to execute a defrosting mode, recording the control frequency of the defrosting mode, controlling one or more of the rotating speed of the external fan, the frequency of the compressor and the opening degree of the expansion valve to be adjusted according to the first adjustment value and the control frequency, operating for a first time period, acquiring the outdoor humidity and a defrosting cycle again, and judging whether the defrosting cycle is smaller than the acquired preset cycle value or not according to the preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval and the acquired preset cycle value corresponding to the acquired preset humidity subinterval:
if so, acquiring the current control times, and controlling one or more of the rotating speed of the external fan, the frequency of the compressor and the opening degree of the expansion valve to be adjusted according to the second adjustment value and the control times;
if not, the defrosting mode is exited.
Along with the increase of the control times of the defrosting mode, the defrosting control degree is improved, and the adjusting range of the rotating speed of the outer fan, the frequency of the compressor and the opening degree of the expansion valve is enlarged, so that the outdoor unit can be defrosted as soon as possible.
Optionally, the adjusting according to the second adjustment value and the number of times of controlling includes: and controlling one or more of the rotating speed of the outer fan, the frequency of the compressor and the opening degree of the expansion valve to be adjusted according to the product value of the second adjustment value and the control times.
The air conditioner is adjusted through the product value of the control times and the second adjustment value, defrosting control of different degrees can be carried out according to different conditions, and the defrosting effect is more consistent with the corresponding conditions.
Optionally, after the outdoor unit exits the defrosting mode, the outdoor temperature, the outdoor humidity and the defrosting period are acquired again, and according to the acquired outdoor temperature, the acquired outdoor humidity and the acquired outdoor humidity, which fall in a preset humidity subinterval of the preset humidity interval, and the acquired defrosting period, the outdoor unit is controlled to execute the defrosting mode, the defrosting mode is subjected to cycle judgment, and defrosting control is performed on the whole operation process of the air conditioner.
Optionally, the acquiring a defrost cycle of the air conditioner includes: the air conditioner records a defrosting period of executing a defrosting mode under the current running condition, and when the air conditioner records a plurality of defrosting periods, the average value of a plurality of continuous defrosting periods of the air conditioner is obtained, so that the accuracy of judgment is improved.
The present invention also provides a defrosting control device for an air conditioner outdoor unit, comprising:
an acquisition unit for acquiring an outdoor temperature and an outdoor humidity;
the control unit is used for controlling the outdoor unit to execute a defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls; the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation.
The invention further provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is read and executed by a processor, the defrosting control method for the air conditioner external unit is realized.
The invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the defrosting control method of the air conditioner external unit.
Drawings
Fig. 1 is a first flowchart of a defrosting control method for an air conditioner external unit according to an embodiment of the present invention;
fig. 2 is a first flowchart of a defrosting control method for an external unit of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a second method for controlling defrosting of an external unit of an air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a second specific implementation of a defrosting control method for an external unit of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it should be noted that the terms "first" and "second" mentioned in the embodiments of the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The embodiment provides a defrosting control method for an air conditioner external unit, which is shown in fig. 1 and includes the following steps:
step S1, obtaining outdoor temperature TOuter coverAnd outdoor humidity HOuter cover；
Step S2, according to the outdoor temperature TOuter coverThe outdoor humidity HOuter coverWith the outdoor humidity HOuter coverFalling into a preset humidity interval IyControlling the outdoor unit to execute a defrosting mode; the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation.
This embodiment passes the outdoor temperature TOuter coverWith outdoor humidity HOuter coverDetermining whether to control the outdoor unit to defrost by dual judgment conditions, and determining the outdoor humidity H under the premise that the outdoor temperature and humidity are in certain conditionsOuter coverThe outdoor unit is defrosted in different degrees in different intervals, and the outdoor temperature T is comprehensively consideredOuter coverWith outdoor humidity HOuter coverAnd (4) preventing the outdoor unit from frosting.
On the basis of the foregoing embodiments, the present embodiment further provides a specific implementation of a defrosting control method for an external unit of an air conditioner, which is shown in fig. 2 and includes:
step S1, obtaining outdoor temperature TOuter coverAnd outdoor humidity HOuter cover；
Step S21, judging the outdoor temperature TOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether it is greater than or equal to a preset humidity value Hy：
If yes, go to step S22;
if not, the process returns to step S1 again to acquire the outdoor temperature T againOuter coverWith outdoor humidity HOuter coverThen, the flow proceeds to step S21 to determine the outdoor temperature TOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether it is greater than or equal to the presetHumidity value Hy；
Step S22, judging the outdoor humidity HOuter coverWhether it is in the preset humidity interval IyInternal:
if yes, according to the outdoor humidity HOuter coverFall into the preset humidity interval IyIn the preset humidity subinterval IynObtaining the preset humidity subinterval IynCorresponding first adjustment value AnAccording to the first adjustment value AnControlling the outdoor unit to defrost;
if not, the outdoor temperature T is acquired againOuter coverWith outdoor humidity HOuter coverAccording to the retrieved outdoor temperature TOuter coverRegained outdoor humidity HOuter coverWith regained outdoor humidity HOuter coverFalling into a preset humidity interval IyAnd controlling the outdoor unit to execute a defrosting mode.
Alternatively, in step S21, the outdoor temperature T is judgedOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether it is greater than or equal to a preset humidity value HyThen, the outdoor temperature T is also judgedOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether it is greater than or equal to a preset humidity value HyWait for a preset time period tyAnd when the judgment condition is met and the preset duration lasts, the defrosting control is judged to be needed, so that the judgment is more accurate.
It should be noted that, in the embodiment, the process of returning to the above steps again for re-determination is all waiting for the second duration t2Then returning to the above step for re-determination, in step S22, if the outdoor humidity H is equal to or lower than the predetermined valueOuter coverIs not in the preset humidity interval IyIn, wait for the second duration t2Then the outdoor temperature T is obtained againOuter coverWith outdoor humidity HOuter coverAccording to the retrieved outdoor temperature TOuter coverRegained outdoor humidity HOuter coverWith regained outdoor humidity HOuter coverFalling into a preset humidity interval IyControlling the outdoor unitAnd executing a defrosting mode, and obtaining and judging again after the outdoor unit operates stably.
Optionally, the determination condition in step S21 further includes the outdoor temperature TOuter coverLess than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverGreater than or equal to the preset humidity value HyIs greater than the fourth duration t4I.e. at the acquisition of the outdoor temperature TOuter coverAnd outdoor humidity HOuter coverThen, the outdoor temperature T is judgedOuter coverWhether it is less than or equal to the preset temperature value TyThe outdoor humidity HOuter coverWhether it is greater than or equal to a preset humidity value HyAnd said outdoor temperature TOuter coverLess than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverGreater than or equal to the preset humidity value HyIs greater than the fourth duration t4：
If yes, according to the outdoor humidity HOuter coverFalling into a preset humidity interval IyControlling the outdoor unit to execute a defrosting mode;
if not, the outdoor temperature T is acquired againOuter coverWith outdoor humidity HOuter coverAccording to the retrieved outdoor temperature TOuter coverRegained outdoor humidity HOuter coverWith a preset humidity interval I into which the reacquired outdoor humidity fallsyAnd controlling the outdoor unit to execute defrosting mode judgment.
Whether defrosting is needed or not is judged by whether the defrosting preset condition is met or not, and the condition is met and the defrosting lasts for a certain time, so that parameter errors of single time or short time caused by unstable operation of the air conditioner are eliminated, and the judgment is more accurate.
Specifically, the preset humidity interval IyDividing a plurality of preset humidity subintervals IynEach of the preset humidity subintervals IynCorresponding to a first adjustment value AnThe first adjustment value AnIncluding one or more of the rotating speed of an external fan, the frequency of a compressor and the opening degree of an expansion valve, and the first adjustment value AnAnd the predetermined humidity subintervalIynIs positively correlated with the size of the compound.
Preferably, following a preset humidity sub-interval IynOf the first adjustment value AnIs increased, e.g. the preset humidity interval IyComprises a first preset humidity subinterval Iy1A second predetermined humidity sub-interval Iy2And a third predetermined humidity sub-interval Iy3First predetermined humidity sub-interval Iy1Corresponding first adjustment value A1Is +50rpm, a second preset humidity subinterval Iy2Corresponding first adjustment value A2Is +100rpm, a third preset humidity subinterval Iy3Corresponding first adjustment value A3Is +150 rpm. When the outdoor humidity H is obtainedOuter coverFalls into a second preset humidity subinterval Iy2When the defrosting is performed, the rotating speed of the outer fan is controlled to be increased by 100 rpm.
Similarly, the first adjustment value A corresponding to the frequency of the compressornFollowing a predetermined humidity sub-interval IynIs increased by an increase in; first adjustment value A corresponding to opening degree of expansion valvenFollowing a predetermined humidity sub-interval IynIs increased.
Specifically, when the outdoor unit is controlled to perform a defrost mode, the outdoor humidity H is determined according to the outdoor humidityOuter coverFalling into the preset humidity subinterval IynCorresponding first adjustment value AnControlling the outdoor unit to defrost for a third time period t3Then, the outdoor humidity H is obtained againOuter coverJudging the outdoor humidity H obtained againOuter coverWhether it is in the preset humidity interval IyInternal:
if yes, according to the obtained outdoor humidity HOuter coverFall into the preset humidity interval IyIn the preset humidity subinterval IynObtaining the newly obtained preset humidity subinterval IynCorresponding first adjustment value AnAccording to the retrieved first adjustment value AnControlling the outdoor unit to defrost;
if not, the defrosting mode is exited.
For example, a first predetermined humidity sub-interval Iy1Corresponding first toneInteger value A1At +50rpm and +5 steps, a second predetermined humidity subinterval Iy2Corresponding first adjustment value A2At +100rpm and +10 steps, a third predetermined humidity subinterval Iy3The corresponding first adjustment value A3 is +150rpm and +15 steps. When the outdoor humidity H is obtained for the first timeOuter coverFalls into a third preset humidity subinterval Iy3When the defrosting operation is carried out, the rotating speed of the outer fan is controlled to increase by 150rpm, and the opening of the expansion valve is controlled to increase by 15 steps so as to defrost; after the opening of the external fan and the expansion valve is controlled for the first time, waiting for a third time period t3Then, the outdoor humidity H is obtained againOuter coverReacquired outdoor humidity HOuter coverFalls into a second preset humidity subinterval Iy2And controlling the rotating speed of the outer fan to increase by 100rpm and controlling the opening of the expansion valve to increase by 10 steps to defrost, and sequentially performing until the defrosting mode is exited.
On the basis of the foregoing embodiments, the present embodiment further provides another specific implementation manner of a defrosting control method for an external unit of an air conditioner, which is shown in fig. 3 and includes:
step M1 of obtaining outdoor temperature TOuter coverOutdoor humidity HOuter coverAnd defrost cycle CRemoving device；
Step M2, according to the outdoor temperature TOuter coverThe outdoor humidity HOuter coverWith the outdoor humidity HOuter coverFalling into a preset humidity interval IyAnd according to said defrost cycle CRemoving deviceControlling the outdoor unit to perform a defrost mode, specifically, according to an outdoor temperature TOuter coverOutdoor humidity HOuter coverOutdoor humidity HOuter coverFalling into a preset humidity interval IyAnd defrost cycle CRemoving deviceThe compressor is controlled to execute the defrosting mode, and the judgment and control can be carried out in sequence according to a certain front and back sequence and reasonable logic.
When the outdoor humidity HOuter coverAbove a certain value, the frosting period of the air conditioner is reduced theoretically; the moisture content of the air in the environment of the outdoor unit is increased, and moisture in the air is more likely to condense in the pipeline, so that the frosting speed is increased, and the frosting frequency is increased, for example: the defrosting function is operated for 2 times in 2 hours under normal humidity, and the defrosting function is operated for 4 times in 2 hours under high humidityThe frost function, indoor set heating effect reduces when the defrosting process of operation, experiences the worsening. However, there is an outdoor humidity HOuter coverHigh defrost cycle CRemoving deviceUnder the condition of being in a normal range, the defrosting mode is judged whether to enter or not by adopting two factors, and the judgment is more accurate.
In particular, defrost cycle CRemoving deviceRecording the defrosting time period of the air conditioner in the early operation under the secondary operation condition, and when the air conditioner is stopped and started again, the defrosting time period CRemoving deviceAnd (4) clearing. When the air conditioner does not record the defrosting period CRemoving deviceNot according to defrost cycle CRemoving deviceBut only according to the outdoor temperature TOuter coverOutdoor humidity HOuter coverWith outdoor humidity HOuter coverFalling into a preset humidity interval IyAnd controlling defrosting of the outdoor unit. Preferably, when the air conditioner records a number of defrost cycles CRemoving deviceThen, the latest defrosting period C of continuous times can be obtainedRemoving deviceAnd (4) taking an average value to improve the accuracy of judgment.
More specifically, the present embodiment provides the above-described dependence on the outdoor temperature TOuter coverOutdoor humidity HOuter coverOutdoor humidity HOuter coverFalling into a preset humidity interval IyAnd defrost cycle CRemoving deviceAn embodiment of controlling the compressor to perform the defrost mode, as shown in fig. 4, includes:
step M1 of obtaining outdoor temperature TOuter coverOutdoor humidity HOuter coverAnd defrost cycle CRemoving device；
Step M21 of judging the outdoor temperature TOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether it is greater than or equal to a preset humidity value Hy：
If yes, go to step M22;
if not, the step M1 is returned to, and the outdoor temperature T is obtained againOuter coverOutdoor humidity HOuter coverAnd defrost cycle CRemoving deviceThen, the step M21 is entered to judge the outdoor temperature TOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether or not it is greater than or equal to a preset humidity valueHy；
Step M22, the preset humidity interval IyDividing a plurality of preset humidity subintervals IynEach of the preset humidity subintervals IynRespectively corresponding to a preset period value CynAccording to the outdoor humidity HOuter coverFall into the preset humidity interval IyThe preset humidity subinterval IynObtaining the preset humidity subinterval IynCorresponding preset period value CynJudging the defrosting period CRemoving deviceWhether it is less than the preset period value Cyn：
If yes, controlling the outdoor unit to defrost according to a second adjusting value B, wherein the second adjusting value B comprises one or more of the rotating speed of an external fan, the frequency of a compressor and the opening degree of an expansion valve;
if not, the step M1 is returned to, and the outdoor temperature T is obtained againOuter coverOutdoor humidity HOuter coverAnd defrost cycle CRemoving deviceThen, the step M21 is entered to judge the outdoor temperature TOuter coverWhether it is less than or equal to the preset temperature value TyAnd the outdoor humidity HOuter coverWhether it is greater than or equal to a preset humidity value Hy；
Specifically, the embodiment of controlling the outdoor unit to defrost according to the second adjustment value B is the same as that of the step S22 according to the first adjustment value anThe specific implementation of controlling the outdoor unit to defrost is different. In this embodiment, the second adjustment value B is a fixed value and is within the predetermined humidity sub-interval IynIs irrelevant。
Specifically, in the above embodiment, when the outdoor unit is controlled to execute the defrosting mode, the number of times m of controlling the defrosting mode is recorded, one or more of the rotation speed of the external fan, the frequency of the compressor and the opening degree of the expansion valve is controlled to be adjusted according to the product of the second adjustment value B and the number of times m of controlling, and the operation is performed for the first time period t1Then, the outdoor humidity H is obtained againOuter coverAnd defrost cycle CRemoving deviceAccording to the retrieved outdoor humidity HOuter coverFall into the preset humidity interval IyPreset humidity inDegree sub-interval IynAccording to the retrieved preset humidity subinterval IynCorresponding preset period value CynJudging the defrosting period CRemoving deviceWhether it is less than the preset period value Cyn：
If yes, controlling the outdoor unit to defrost according to a product value of a second adjusting value B and the control times m;
if not, the defrosting mode is exited.
Specifically, the motor speed N is equal to N0+N1× m, wherein N is0The rotating speed of the external fan before adjustment, specifically the rotating speed of the motor after last adjustment, N1The second adjustment value B is a corresponding motor rotating speed adjustment value, and m is the control frequency of the defrosting mode; frequency F of compressor0+F1× m, wherein F0For the pre-adjustment of the frequency of the compressor, in particular the last adjustment, F1The frequency adjustment value is a compressor frequency adjustment value corresponding to the second adjustment value B, and m is the control frequency of the defrosting mode; opening D of expansion valve0+D1× m, wherein D0For adjusting the opening degree of the expansion valve, in particular the opening degree of the expansion valve after the last adjustment, D1And m is the control frequency of the defrosting mode.
Taking the motor speed as an example, where N1Taking a value of 60rpm, recording the control times M of the defrosting mode as 1 when the defrosting mode is firstly entered and the rotating speed of the outer fan needs to be increased, and controlling the rotating speed of the outer fan to increase by 60rpm 1 according to the product value of the second adjustment value B and the control times M, namely controlling the rotating speed of the outer fan to increase by 60 rpm; operating for a first time period t1Then, based on the retrieved preset humidity subinterval I againynCorresponding preset period value CynWhen the rotating speed of the outer fan needs to be controlled for the second time, the control frequency M of the defrosting mode is recorded as 2, and the rotating speed of the outer fan is controlled to be increased by 60rpm x 2 according to the product value of the second adjusting value B and the control frequency M, namely the rotating speed of the outer fan is controlled to be increased by 120 rpm; operates again for a first time period t1Then, based on the retrieved preset humidity subinterval I againynCorresponding preset weekTerm value CynAnd when the third time of controlling the rotating speed of the outer fan is judged to be needed, recording the control times M of the defrosting mode as 3, controlling the rotating speed of the outer fan to increase by 60rpm x 3 according to the product value of the second adjusting value B and the control times M, namely controlling the rotating speed of the outer fan to increase by 180rpm, and sequentially carrying out the steps until the defrosting mode is exited.
Specifically, when the outdoor unit exits the defrosting mode, the outdoor temperature T is acquired againOuter coverOutdoor humidity HOuter coverAnd defrost cycle CRemoving deviceAccording to the retrieved outdoor temperature TOuter coverRegained outdoor humidity HOuter coverRegained outdoor humidity HOuter coverFall into the preset humidity interval IyIn the preset humidity subinterval IynWith reacquired defrost cycle CRemoving deviceAnd controlling the outdoor unit to execute a defrosting mode.
It should be noted that, when the defrosting mode is exited and a new defrosting mode is entered by judging again, the number m of times of controlling the defrosting mode is recorded again.
It should be noted that, in this embodiment, the product value of the control frequency m and the second adjustment value B is taken as an example to perform defrosting control on the air conditioner, and the defrosting control method of the present invention may also obtain different adjustment values according to the control frequency m in other manners, and then add the adjustment values to the second adjustment value; or different proportional values are obtained according to the control times m, and control is carried out through the product of the second adjusting value and the proportional value. The present invention controls one or more of the rotation speed of the external fan, the frequency of the compressor, and the opening degree of the expansion valve to be adjusted according to the second adjustment value and the number of times of control, preferably according to a product value of the second adjustment value and the number of times of control.
This embodiment still provides an outer quick-witted defrosting control device of air conditioner, includes:
an acquisition unit for acquiring an outdoor temperature TOuter coverAnd outdoor humidity HOuter cover；
A control unit for determining the outdoor temperature TOuter coverThe outdoor humidity HOuter coverWith the outdoor humidity HOuter coverFalling into a preset humidity interval IyControlling the outdoor unit to execute a defrosting mode; the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation.
The present embodiment also provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read and executed by a processor, the method for controlling defrosting of an external unit of an air conditioner is implemented.
The embodiment also provides an air conditioner, which comprises a computer readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the defrosting control method for the external unit of the air conditioner.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (14)

1. A defrosting control method for an air conditioner outdoor unit is characterized by comprising the following steps:
acquiring outdoor temperature and outdoor humidity;
controlling an outdoor unit to execute a defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls; the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation.
2. The method for controlling an outdoor unit of an air conditioner according to claim 1, wherein the controlling an outdoor unit to perform a defrost mode according to the outdoor temperature, the outdoor humidity and a preset humidity range in which the outdoor humidity falls comprises:
judging whether the outdoor temperature is less than or equal to a preset temperature value and whether the outdoor humidity is greater than or equal to a preset humidity value:
if yes, controlling the outdoor unit to execute a defrosting mode according to a preset humidity interval in which the outdoor humidity falls;
and if not, acquiring the outdoor temperature and the outdoor humidity again, and controlling the outdoor unit to execute the defrosting mode according to the acquired outdoor temperature, the acquired outdoor humidity and the preset humidity interval in which the acquired outdoor humidity falls.
3. The method for controlling an outdoor unit of an air conditioner according to claim 1, wherein the controlling an outdoor unit to perform a defrost mode according to the outdoor temperature, the outdoor humidity and a preset humidity range in which the outdoor humidity falls comprises:
judging whether the outdoor temperature is less than or equal to a preset temperature value, whether the outdoor humidity is greater than or equal to a preset humidity value, and whether the duration of the outdoor temperature is less than or equal to the preset temperature value and the duration of the outdoor humidity is greater than or equal to the preset humidity value is greater than a fourth duration:
if yes, controlling the outdoor unit to execute a defrosting mode according to a preset humidity interval in which the outdoor humidity falls;
and if not, re-acquiring the outdoor temperature and the outdoor humidity, and controlling the outdoor unit to execute defrosting mode judgment according to the re-acquired outdoor temperature, the re-acquired outdoor humidity and a preset humidity interval in which the re-acquired outdoor humidity falls.
4. The defrosting control method for an outdoor unit of an air conditioner according to claim 2 or 3, wherein the preset humidity interval is divided into a plurality of preset humidity subintervals, each preset humidity subinterval corresponds to a first adjustment value, the first adjustment value includes one or more of an external fan rotation speed, a compressor frequency and an expansion valve opening degree, and an absolute value of the first adjustment value is in positive correlation with the size of the preset humidity subinterval; the controlling the outdoor unit to execute the defrosting mode according to the preset humidity interval in which the outdoor humidity falls comprises the following steps:
judging whether the outdoor humidity is in the preset humidity interval:
if yes, acquiring the first adjustment value corresponding to the preset humidity subinterval according to the preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval, and controlling the outdoor unit to defrost according to the first adjustment value;
and if not, acquiring the outdoor temperature and the outdoor humidity again, and controlling the outdoor unit to execute the defrosting mode according to the acquired outdoor temperature, the acquired outdoor humidity and the preset humidity interval in which the acquired outdoor humidity falls.
5. The outdoor unit defrosting control method of an air conditioner according to claim 4, further comprising:
when the outdoor unit is controlled to execute a defrosting mode, the outdoor unit is controlled to defrost according to the first adjustment value corresponding to the preset humidity sub-interval in which the outdoor humidity falls, the outdoor humidity is obtained again after the outdoor unit is operated for a third time, and whether the obtained outdoor humidity is in the preset humidity interval or not is judged:
if so, acquiring a first adjustment value corresponding to the newly acquired preset humidity subinterval according to the newly acquired preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval, and controlling the outdoor unit to defrost according to the newly acquired first adjustment value;
if not, the defrosting mode is exited.
6. The outdoor unit defrosting control method of an air conditioner according to claim 2 or 3, further comprising:
and acquiring a defrosting period of the air conditioner, and controlling the outdoor unit to execute a defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls.
7. The method as claimed in claim 6, wherein the preset humidity interval is divided into a plurality of preset humidity subintervals, each of the preset humidity subintervals corresponds to a preset period value, and the controlling the outdoor unit to perform the defrost mode according to the outdoor temperature, the outdoor humidity and the preset humidity interval in which the outdoor humidity falls and the defrost cycle comprises:
according to the preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval, acquiring a preset period value corresponding to the preset humidity subinterval, and judging whether the defrosting period is smaller than the preset period value:
if yes, controlling the outdoor unit to defrost according to a second adjusting value, wherein the second adjusting value comprises one or more of the rotating speed of an external fan, the frequency of a compressor and the opening degree of an expansion valve;
and if not, re-acquiring the outdoor temperature, the outdoor humidity and the defrosting period, and controlling the outdoor unit to execute the defrosting mode according to the re-acquired outdoor temperature, the re-acquired outdoor humidity, a preset humidity subinterval in which the re-acquired outdoor humidity falls into the preset humidity interval and the re-acquired defrosting period.
8. The outdoor unit defrosting control method of an air conditioner according to claim 7, further comprising:
when the outdoor unit is controlled to execute a defrosting mode, recording the control frequency of the defrosting mode, controlling one or more of the rotating speed of the external fan, the frequency of the compressor and the opening degree of the expansion valve to be adjusted according to the second adjustment value and the control frequency, operating for a first time period, acquiring the outdoor humidity and a defrosting cycle again, and judging whether the defrosting cycle is smaller than the acquired preset cycle value or not according to the preset humidity subinterval in which the outdoor humidity falls into the preset humidity interval and the acquired preset cycle value corresponding to the acquired preset humidity subinterval:
if so, acquiring the current control times, and controlling one or more of the rotating speed of the external fan, the frequency of the compressor and the opening degree of the expansion valve to be adjusted according to the second adjustment value and the control times;
if not, the defrosting mode is exited.
9. The outdoor unit defrosting control method of claim 8, wherein the adjusting according to the second adjustment value and the number of times of control comprises: and controlling one or more of the rotating speed of the outer fan, the frequency of the compressor and the opening degree of the expansion valve to be adjusted according to the product value of the second adjustment value and the control times.
10. The outdoor unit defrosting control method of an air conditioner according to claim 8 or 9, further comprising:
and when the outdoor unit exits the defrosting mode, acquiring the outdoor temperature, the outdoor humidity and the defrosting cycle again, and controlling the outdoor unit to execute the defrosting mode according to the acquired outdoor temperature, the acquired outdoor humidity and the acquired outdoor humidity, which fall into a preset humidity subinterval in the preset humidity interval, and the acquired defrosting cycle.
11. The outdoor unit defrosting control method of an air conditioner according to claim 6, wherein the acquiring a defrosting cycle of the air conditioner comprises:
the air conditioner records a defrosting period of executing a defrosting mode under the current running condition, and when the air conditioner records a plurality of defrosting periods, an average value of a plurality of continuous defrosting periods of the air conditioner is obtained.
12. The utility model provides an outer quick-witted defrosting control device of air conditioner which characterized in that includes:
an acquisition unit for acquiring an outdoor temperature and an outdoor humidity;
the control unit is used for controlling the outdoor unit to execute a defrosting mode according to the outdoor temperature, the outdoor humidity and a preset humidity interval in which the outdoor humidity falls; the defrosting mode comprises one or more of external fan speed regulation, compressor frequency regulation and expansion valve opening degree regulation.
13. A computer-readable storage medium storing a computer program, which when read and executed by a processor, implements the defrosting control method for an outdoor unit of an air conditioner according to any one of claims 1 to 11.
14. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the defrosting control method of an outdoor unit of an air conditioner according to any one of claims 1 to 11.
CN202010514053.0A 2020-06-08 2020-06-08 Defrosting control method and device for air conditioner external unit, storage medium and air conditioner Pending CN111692707A (en)

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CN112665118A (en) * 2020-12-22 2021-04-16 珠海格力电器股份有限公司 Defrosting control method and device of heat pump unit, storage medium and heat pump unit
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CN112902407B (en) * 2021-01-28 2022-04-22 四川长虹空调有限公司 Method for controlling operation frequency of variable frequency air conditioner through outdoor humidity
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CN114777288A (en) * 2022-03-18 2022-07-22 青岛海尔空调器有限总公司 Defrosting method and device for air conditioner external unit
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Application publication date: 20200922