CN110594959A - Air conditioner control method - Google Patents

Air conditioner control method Download PDF

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Publication number
CN110594959A
CN110594959A CN201910882942.XA CN201910882942A CN110594959A CN 110594959 A CN110594959 A CN 110594959A CN 201910882942 A CN201910882942 A CN 201910882942A CN 110594959 A CN110594959 A CN 110594959A
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CN
China
Prior art keywords
temperature
air conditioner
frosting
outer plate
expansion valve
Prior art date
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Granted
Application number
CN201910882942.XA
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Chinese (zh)
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CN110594959B (en
Inventor
王明剑
陈伟
古汤汤
冷泠
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
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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 CN201910882942.XA priority Critical patent/CN110594959B/en
Publication of CN110594959A publication Critical patent/CN110594959A/en
Application granted granted Critical
Publication of CN110594959B publication Critical patent/CN110594959B/en
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Classifications

    • 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
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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

Abstract

The invention provides an air conditioner control method, under the heating mode, obtaining the temperature change value delta T of an outdoor environment temperature T outer ring and an outer disc; judging whether the air conditioner frosts according to the acquired temperature change value delta T of the outdoor environment temperature T outer ring and the outer disc; and when the frosting of the air conditioner is judged, controlling the opening of the expansion valve to be increased according to a certain speed upsilon, wherein the speed upsilon is at least based on the outer disc temperature change value DeltaT and the outer disc is changed exponentially. Therefore, after the frosting of the outdoor condenser is detected, the opening degree of the expansion valve can be timely responded and adjusted to the frosting severity degree, and the refrigerant flow is increased, so that the evaporation and condensation pressure of the system is improved, the frosting process is inhibited, and the attenuation of the heating capacity of the air conditioner is inhibited.

Description

Air conditioner control method
Technical Field
The invention relates to the field of air conditioning, in particular to an air conditioner control method.
Background
The air conditioner generally comprises a compressor, a condenser, a throttling device and an evaporator, wherein the throttling device of the household air conditioner mainly comprises an electronic expansion valve and a capillary tube, and the electronic expansion valve can realize automatic control of the flow of a cooling medium in the system and ensure that the system can exert the maximum capacity under different load conditions. The opening of an electronic expansion valve of a common household air conditioner is adjusted according to the exhaust temperature of a compressor, when the exhaust temperature is lower than the target exhaust set by a program, the throttling effect needs to be increased, and the opening of the expansion valve is reduced; when the exhaust temperature is higher than the target exhaust gas set by the program, the throttle effect needs to be reduced, and the opening degree of the expansion valve is increased. And under the low temperature operating mode, because of outdoor condenser can constantly frosting, increased outdoor side heat transfer windage, the heat transfer effect is poor, and the low pressure reduces, and the compressor suction temperature descends, and corresponding exhaust temperature reduces, and in order to reach the target exhaust of procedure setting, the expansion valve aperture reduces, and the result of bringing is that the throttle effect is more serious, and the effect of frosting is more obvious, can influence user's comfortable nature and experience.
Therefore, under the outdoor low-temperature working condition, after the frosting of the outdoor condenser is detected, if the normal control mode is adopted, the opening of the electronic expansion valve is continuously closed by a small valve step so as to achieve the required target exhaust, the frosting is further worsened, the outdoor heat exchange effect is poor, and the use performance of the air conditioner is influenced.
Disclosure of Invention
In order to solve at least one of the above problems, the present invention provides an air conditioner control method.
A control method of air conditioner is to obtain outdoor ambient temperature T in heating modeOuter ringOuter disc temperature variation value delta TOuter plate(ii) a According to the obtained outdoor environment temperature TOuter ringOuter disc temperature variation value delta TOuter plateJudging whether the air conditioner meets the frosting condition; when the air conditioner is judged to meet the frosting condition, the opening degree of the expansion valve is controlled to be upsized according to a certain speed upsilon, and the upsilon is controlled to be upsilonWherein the rate υ is based at least on the outer disc temperature variation value Δ TOuter plateIs exponentially changed.
Further, the temperature change value Delta T of the outer diskOuter plateIs designed as a first outer disk temperature T at a first timeOuter plate 1And a second outer disk temperature T at a second timeOuter plate 2Wherein the first time is separated from the second time by a time period t.
Further, the rate υ is configured as υ a (Δ T)Outer plate)m+b(△TOuter plate)n
Wherein 0< a < b <1 and m > n.gtoreq.1.
Preferably, the ratio of a to b is inversely proportional to the ratio of m to n.
Preferably, the frosting judgment is at least based on the temperature T of the outdoor environmentOuter ringIn a first temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a first temperature T1The relationship is such that,
when the temperature change value Delta T of the outer diskOuter plateNot less than the first temperature T1And judging that the air conditioner is frosted.
Preferably, the frosting judgment is at least based on the temperature T of the outdoor environmentOuter ringIn a second temperature interval, judging the temperature change value Delta T of the outer diskOuter plateAnd a second temperature T2The relationship is such that,
when the temperature change value Delta T of the outer diskOuter plateNot less than the second temperature T2And judging that the air conditioner is frosted.
Preferably, the frosting judgment is at least based on the temperature T of the outdoor environmentOuter ringIn a third temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a third temperature T3The relationship is such that,
when the temperature change value Delta T of the outer diskOuter plateNot less than the third temperature T3And judging that the air conditioner is frosted.
Preferably, the first temperature interval is more than or equal to 0 ℃ and less than or equal to TOuter ringNot more than 5 ℃, and the first temperature T1T is more than or equal to 3 DEG C1≤6℃。
Preferably, the second temperature interval is between-5 ℃ and TOuter ring<5 ℃ and the second temperature T2T is more than or equal to 2 DEG C2≤5℃。
Preferably, the third temperature interval is TOuter ring<-5 ℃, said third temperature T3T is more than or equal to 1 DEG C3≤4℃。
Preferably, when the temperature of the outer disk changes by a value DeltaTOuter plateNot higher than the fourth temperature T4Interrupting the intervention control of the opening degree of the expansion valve,
wherein the fourth temperature T4T is not less than-1 DEG C4≤1℃。
Preferably, when the opening degree P of the expansion valve is not less than the maximum opening degree P of the expansion valvemax3/4, intervention control of the expansion valve opening is interrupted.
Preferably, when the outdoor ambient temperature T isOuter ringNot less than TRated valueWhile interrupting the intervention control of the opening of the expansion valve, wherein TRated valueIt was 7 ℃.
The invention also provides a control device for delaying frosting of an air conditioner, which is applied to the air conditioner and comprises the following components:
an acquisition unit for acquiring an outdoor ambient temperature TOuter ringOuter disc temperature variation value delta TOuter plate；
A determination unit for obtaining the outdoor environment temperature T according to the obtainedOuter ringOuter disc temperature variation value delta TOuter plateDetermining whether the air conditioner satisfies a frosting condition;
an adjusting unit for adjusting an expansion valve opening degree based on the determination result of the determining unit,
the air conditioner frost-formation delaying control device implements the air conditioner control method.
The present invention also provides an air conditioner, comprising: a computer-readable storage medium; a processor; and
an air conditioner delayed frosting control device installed in the memory and including one or more software function modules executable by the controller, the air conditioner delayed frosting control device comprising:
an acquisition unit for acquiring an outdoor ambient temperature TOuter ringOuter disc temperature variation value delta TOuter plate；
A determination unit for obtaining the outdoor environment temperature T according to the obtainedOuter ringOuter disc temperature variation value delta TOuter plateDetermining whether the air conditioner satisfies a frosting condition;
an adjusting unit for adjusting an expansion valve opening degree based on the determination result of the determining unit,
wherein the air conditioner implements the aforementioned air conditioner control method.
The invention also provides a computer readable storage medium which stores a computer program, wherein the computer program is read by a processor and runs to realize the air conditioner control method.
Therefore, after the frosting of the outdoor condenser is detected, the opening degree of the expansion valve can be timely responded to the degree of severity of frosting to adjust, so that the evaporation and condensation pressure of the system is improved, the frosting process is inhibited, and the attenuation of the heating capacity of the air conditioner is further inhibited.
In particular, the timely response adjustment is based at least on an expansion valve opening degree regulation speed upsilon and an outer disc temperature change value delta TOuter plateBecome the index change to the realization is to the timely response adjustment of frosting severity, simultaneously because of the high pressure of system improves, and air-out temperature also can corresponding promotion, and user's travelling comfort experience is better, and judges control through the interrupt condition to expansion valve opening control, avoids the problem that the throttle effect that excessive adjustment leads to is not obvious, the efficiency reduces.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a functional block diagram of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an air conditioner control method according to an embodiment of the present invention.
Fig. 3 is a functional block diagram of an air conditioner frost-formation delay control device according to an embodiment of the present invention.
Icon: 1-an air conditioner; 2-a controller; 3-a memory; 4-a compressor; 5-an expansion valve; 6-a frost delaying control device of the air conditioner; 7-an acquisition unit; 8-a determination unit; 9-an adjusting unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
First embodiment
The embodiment of the invention provides an air conditioner 1, which is used for realizing the timely response adjustment of the opening degree of an expansion valve to the severity of frosting after an outdoor condenser is frosted when the frosting is easily caused due to the low temperature of the external environment in a heating mode, so that the evaporation and condensation pressure of a system is improved, the frosting process is inhibited, and the attenuation of the heating capacity of the air conditioner is inhibited.
Fig. 1 is a functional block diagram of an air conditioner 1 according to an embodiment of the present invention. The air conditioner 1 includes: the controller 2, the memory 3, the compressor 4, the expansion valve 5 and the air conditioner frost-delay control device 6. The controller 2 is electrically connected with the memory 3, the compressor 4 and the expansion valve 5, and the expansion valve control method comprises that at least one of the methods can be stored in the memory 3 in the form of software or firmware.
The memory 3 may be used to store software programs and units, such as program instructions/units corresponding to the air conditioner frost-formation delaying control device 6 and the method in the embodiment of the present invention, and the controller 2 executes various functional applications and data processing by running the software programs and units of the air conditioner frost-formation delaying control device 6 and the method stored in the memory 3, such as the air conditioner control method provided in the embodiment of the present invention. The Memory may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
The controller 2 is configured to execute executable modules stored in the memory 3, such as software functional modules and computer programs included in the air conditioner frost-formation delaying control device 6.
It should be understood that the configuration shown in fig. 1 is merely a schematic configuration of the air conditioner 1, and that the air conditioner 1 may include more or less components than those shown in fig. 1, or have a different configuration than that shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
Second embodiment
The embodiment provides a method for controlling air conditioner frost delay, and fig. 2 shows a flowchart of the method for controlling air conditioner frost delay provided by the embodiment. In the heating mode, when the air conditioner delay frosting control method provided by the embodiment detects that the external environment temperature is low and frosting is easy, the opening degree of the expansion valve is timely responded to and adjusted for the frosting severity degree after the outdoor condenser is frosted, so that the evaporation and condensation pressure of the system is improved, the frosting process is inhibited, and further the attenuation of the heating capacity of the air conditioner is inhibited.
Referring to fig. 2, the method for controlling the air conditioner to delay frost formation in the heating mode includes the following steps:
step S10: periodic detection of outdoor ambient temperature TOuter ringAnd outer disc temperature variation value DeltaTOuter plate。
When the air conditioner 1 is stably operated, the outdoor ambient temperature T is acquired at regular time intervals TOuter ringAnd outer disc temperature variation value DeltaTOuter plate. The stable operation of the air conditioner 1 means that the outdoor environment temperature T is not performed until the air conditioner 1 operates for a certain period of time, for example, 10 minutes after the air conditioner 1 operatesOuter ringAnd outer disc temperature variation value DeltaTOuter plateAnd (4) obtaining. The time period t may be set according to the cooling or heating performance of the air conditioner 1, for example, the time period t may be 3-5 minutes, but is not limited thereto.
Step S20: according to the obtained outdoor environment temperature TOuter ringAnd outer disc temperature variation value DeltaTOuter plateIt is determined whether the air conditioner 1 is frosted. Wherein the outer disk temperature variation value DeltaTOuter plateIs formed as a first timeTemperature T of the first outer diskOuter plate 1And a second outer disk temperature T at a second timeOuter plate2, wherein the first time and the second time are separated by a time period t of 3 min. I.e., Delta TOuter plate＝TOuter plate2-TOuter plate1。
In this embodiment, when the outdoor ambient temperature T is lower than the predetermined temperatureOuter ringIn a first temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a first temperature T1Relation, when said outer disc temperature variation value DeltaTOuter plateNot less than the first temperature T1And judging that the air conditioner is frosted. Wherein the first temperature interval is more than or equal to T at 0 DEG COuter ringNot more than 5 ℃, and the first temperature T1T is more than or equal to 3 DEG C1≤6℃。
In parallel, when the outdoor ambient temperature TOuter ringIn a second temperature interval, judging the temperature change value Delta T of the outer diskOuter plateAnd a second temperature T2Relation, when said outer disc temperature variation value DeltaTOuter plateNot less than the second temperature T2And judging that the air conditioner is frosted. Wherein the second temperature interval is more than or equal to T at-5 DEG COuter ring<5 ℃ and the second temperature T2T is more than or equal to 2 DEG C2≤5℃。
In parallel, the frosting judgment is at least based on the outdoor environment temperature TOuter ringIn a third temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a third temperature T3Relation, when said outer disc temperature variation value DeltaTOuter plateNot less than the third temperature T3And judging that the air conditioner is frosted. The third temperature interval is TOuter ring<-5 ℃, said third temperature T3T is more than or equal to 1 DEG C3≤4℃。
If the air conditioner is judged to meet the frosting condition based on the achievement of any one of the three parallel frosting judgment methods, the frosting blocked air quantity of the outdoor fan is reduced at the moment, the frosting thickening heating effect of the outdoor unit heat exchanger is gradually reduced, and the heat supply of the indoor space cannot be continued due to the fact that the hot air needs to be reversed for defrosting.
If outdoor ringAmbient temperature TOuter ringIf the temperature is not in the first temperature interval, the second temperature interval or the third temperature interval, the frosting prevention possibility of the air conditioner 1 is directly determined, and the change value Delta T of the temperature of the external disk is directly skippedOuter plateAnd (4) judging. And the misjudgment caused by the temperature fault of the outer disk is avoided while the judgment action is saved.
If the air conditioner 1 is determined not to meet the frosting condition, keeping the air conditioner 1 to continue to normally operate; if it is determined that the air conditioner 1 satisfies the frosting condition, step S30 is performed.
Step S30: when the air conditioner 1 meets the frosting condition, only the opening degree of the expansion valve 5 is controlled according to the change value delta T based on the temperature of the outer discOuter plateThe exponentially changing rate upsilon is high, the frosting condition is quickly responded in time, and meanwhile, the frosting process can be effectively inhibited without other control means.
Specifically, when the outer unit is detected to meet the frosting condition, the temperature change value delta T of the outer disc is detected based on the previous period TOuter plateAnd the opening degree of the electronic expansion valve in the next period t is increased according to a certain speed upsilon (unit: b/s), and the change speed upsilon of the opening degree of the electronic expansion valve is calculated according to the following formula:
υ＝a(△Touter plate)m+b(△TOuter plate)n
Wherein 0< a < b <1 and m > n.gtoreq.1.
Preferably, the ratio of a to b is inversely proportional to the ratio of m to n.
In particular, it is possible to use, for example,m is 2 and n is 1. Therefore, the outer disc temperature change value Delta T can be accurately detectedOuter plateThe opening of the expansion valve 5 is quickly adjusted in time, the opening speed of the expansion valve 5 is increased when frosting is serious, slow adjustment is realized in a non-critical stage, and then the system stability is improved on the premise of ensuring quick adjustment in time response, accurate adjustment can be realized, and oscillation is avoided.
Further, after the opening control of the expansion valve 5 is carried out, whether the air conditioner meets the opening control quitting condition or not is detected, and when the quitting condition is met, the opening intervention control is interrupted, and the normal control mode that the opening of the expansion valve is controlled according to the target exhaust is recovered.
Specifically, the exit condition may be when the outer disk temperature variation value Δ TOuter plateNot higher than the fourth temperature T4While interrupting the intervention control of the opening of the expansion valve, wherein the fourth temperature T4T is not less than-1 DEG C4≤1℃。
When the expansion valve opening degree P is not less than the expansion valve maximum opening degree Pmax3/4, intervention control of the expansion valve opening is interrupted. Therefore, the problems that the opening degree of the expansion valve is too large, the throttling effect is not obvious, and the capacity and energy efficiency are reduced are solved.
In parallel, when the outdoor ambient temperature TOuter ringNot less than TRated valueWhile interrupting the intervention control of the opening of the expansion valve, wherein TRated valueIt was 7 ℃.
And when any one of the three exit conditions is met, interrupting the opening intervention control, and recovering the normal control mode of controlling the opening of the expansion valve according to the target exhaust.
Third embodiment
Referring to fig. 3, fig. 3 is a schematic diagram illustrating an air conditioner frost-formation delaying control device 6 according to a preferred embodiment of the present invention. It should be noted that the basic principle and the generated technical effects of the air conditioner frost-formation delaying control device 6 provided by the present embodiment are substantially the same as those of the first embodiment, and for the sake of brief description, corresponding contents in the first embodiment can be referred to for parts not mentioned in the present embodiment.
Referring to fig. 3, the air conditioner frost-formation delaying control device 6 includes an obtaining unit 7, a determining unit 8 and an adjusting unit 9.
Wherein the acquisition unit 7 is used for periodically detecting the outdoor environment temperature TOuter ringAnd outer disc temperature variation value DeltaTOuter plate. When the air conditioner 1 is stably operated, the outdoor ambient temperature T is acquired at regular time intervals TOuter ringAnd outer disc temperature variation value DeltaTOuter plate. It will be understood that in a preferred embodimentIn an embodiment, the obtaining unit 7 may be configured to execute step S10.
A determination unit 8 for determining the outdoor ambient temperature TOuter ringAnd outer disc temperature variation value DeltaTOuter plateIt is determined whether the air conditioner 1 is frosted.
When the outdoor ambient temperature TOuter ringIn a first temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a first temperature T1Relation, when said outer disc temperature variation value DeltaTOuter plateNot less than the first temperature T1And judging that the air conditioner is frosted. Wherein the first temperature interval is more than or equal to T at 0 DEG COuter ringNot more than 5 ℃, and the first temperature T1T is more than or equal to 3 DEG C1≤6℃。
In parallel, when the outdoor ambient temperature TOuter ringIn a second temperature interval, judging the temperature change value Delta T of the outer diskOuter plateAnd a second temperature T2Relation, when said outer disc temperature variation value DeltaTOuter plateNot less than the second temperature T2And judging that the air conditioner is frosted. Wherein the second temperature interval is more than or equal to T at-5 DEG COuter ring<5 ℃ and the second temperature T2T is more than or equal to 2 DEG C2≤5℃。
In parallel, the frosting judgment is at least based on the outdoor environment temperature TOuter ringIn a third temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a third temperature T3Relation, when said outer disc temperature variation value DeltaTOuter plateNot less than the third temperature T3And judging that the air conditioner is frosted. The third temperature interval is TOuter ring<-5 ℃, said third temperature T3T is more than or equal to 1 DEG C3≤4℃。
And judging that the air conditioner meets the frosting condition based on the achievement of any one of the three parallel frosting judgment methods.
If the air conditioner 1 is determined not to meet the frosting condition, keeping the air conditioner 1 to continue to operate; if it is determined that the air conditioner 1 satisfies the frosting condition, the frosting suppression operation is performed.
It is to be understood that in a preferred embodiment, the determination unit 8 may be configured to perform step S20.
An adjusting unit 9, configured to control the opening of the expansion valve 5 according to the change value Δ T based on the temperature of the outer plate when the air conditioner 1 satisfies the frosting conditionOuter plateThe exponentially changing rate upsilon is high, the frosting condition is quickly responded in time, and meanwhile, the frosting process can be effectively inhibited without other control means.
Specifically, when the outer unit is detected to meet the frosting condition, the temperature change value delta T of the outer disc is detected based on the previous period TOuter plateAnd the opening degree of the electronic expansion valve in the next period t is increased according to a certain speed upsilon (unit: b/s), and the change speed upsilon of the opening degree of the electronic expansion valve is calculated according to the following formula:
υ＝a(△Touter plate)m+b(△TOuter plate)n
Wherein 0< a < b <1 and m > n.gtoreq.1.
Preferably, the ratio of a to b is inversely proportional to the ratio of m to n.
In particular, it is possible to use, for example,m is 2 and n is 1. Therefore, the outer disc temperature change value Delta T can be accurately detectedOuter plateThe opening of the expansion valve 5 is quickly adjusted in time, the opening speed of the expansion valve 5 is increased when frosting is serious, slow adjustment is realized in a non-critical stage, and then the system stability is improved on the premise of ensuring quick adjustment in time response, accurate adjustment can be realized, and oscillation is avoided.
Further, after the opening control of the expansion valve 5 is carried out, whether the air conditioner meets the opening control quitting condition or not is detected, and when the quitting condition is met, the opening intervention control is interrupted, and the normal control mode that the opening of the expansion valve is controlled according to the target exhaust is recovered.
Specifically, the exit condition may be when the outer disk temperature variation value Δ TOuter plateNot higher than the fourth temperature T4While interrupting the intervention control of the opening of the expansion valve, wherein the fourth temperature T4T is not less than-1 DEG C4≤1℃。
When the expansion valve opening degree P is not less than the expansion valve maximum opening degree Pmax3/4, intervention control of the expansion valve opening is interrupted. Therefore, the problems that the opening degree of the expansion valve is too large, the throttling effect is not obvious, and the capacity and energy efficiency are reduced are solved.
In parallel, when the outdoor ambient temperature TOuter ringNot less than TRated valueWhile interrupting the intervention control of the opening of the expansion valve, wherein TRated valueIt was 7 ℃.
And when any one of the three exit conditions is met, interrupting the opening intervention control, and recovering the normal control mode of controlling the opening of the expansion valve according to the target exhaust.
It is to be understood that in a preferred embodiment, the adjusting unit 9 may be configured to perform step S30.
In summary, according to the air conditioner frosting delay control method provided by the embodiment of the present invention, in the heating mode, when it is detected that the external environment temperature is low and frosting is easy to occur, by implementing the timely response adjustment of the opening degree of the expansion valve to the frosting severity after frosting of the outdoor condenser is detected, the evaporation and condensation pressure of the system is increased, the frosting process is inhibited, and further, the attenuation of the heating capacity of the air conditioner is inhibited. Avoid frosting thicker and thicker, improve user's use experience.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (16)

1. A control method of air conditioner is characterized by that under the heating mode,
obtaining outdoor ambient temperature TOuter ringOuter disc temperature variation value delta TOuter plate；
According to the obtained outdoor environment temperature TOuter ringOuter disc temperature variation value delta TOuter plateJudging whether the air conditioner meets the frosting condition;
when the air conditioner is judged to meet the frosting condition, the opening degree of the expansion valve is controlled to be upsized according to a certain speed upsilon,
wherein the rate υ is based at least on the outer disc temperature change value DeltaTOuter plateIs exponentially changed.
2. The air conditioner controlling method according to claim 1,
the temperature change value Delta T of the outer diskOuter plateIs designed as a first outer disk temperature T at a first timeOuter plate 1And a second outer disk temperature T at a second timeOuter plate 2Wherein the first time is separated from the second time by a time period t.
3. A method as claimed in claim 2, wherein said rate v is configured to be
υ＝a(△TOuter plate)m+b(△TOuter plate)n
Wherein 0< a < b <1 and m > n.gtoreq.1.
4. The air conditioner controlling method according to claim 3,
wherein the ratio of a to b is inversely proportional to the ratio of m to n.
5. The air conditioner controlling method according to claim 1,
the frosting judgment is at least based on when the outdoor environment temperature TOuter ringIn a first temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a first temperature T1The relationship is such that,
when saidOuter disc temperature variation value Delta TOuter plateNot less than the first temperature T1And judging that the air conditioner is frosted.
6. The air conditioner controlling method according to claim 1,
the frosting judgment is at least based on when the outdoor environment temperature TOuter ringIn a second temperature interval, judging the temperature change value Delta T of the outer diskOuter plateAnd a second temperature T2The relationship is such that,
when the temperature change value Delta T of the outer diskOuter plateNot less than the second temperature T2And judging that the air conditioner is frosted.
7. The air conditioner controlling method according to claim 1,
the frosting judgment is at least based on when the outdoor environment temperature TOuter ringIn a third temperature interval, judging the temperature change value Delta T of the outer discOuter plateAnd a third temperature T3The relationship is such that,
when the temperature change value Delta T of the outer diskOuter plateNot less than the third temperature T3And judging that the air conditioner is frosted.
8. The air conditioner controlling method according to claim 5,
the first temperature interval is more than or equal to T at 0 DEG COuter ringNot more than 5 ℃, and the first temperature T1T is more than or equal to 3 DEG C1≤6℃。
9. The air conditioner controlling method according to claim 6,
the second temperature interval is more than or equal to T at minus 5 DEG COuter ring<5 ℃ and the second temperature T2T is more than or equal to 2 DEG C2≤5℃。
10. The air conditioner controlling method according to claim 7,
the third temperature interval isTOuter ring<-5 ℃, said third temperature T3T is more than or equal to 1 DEG C3≤4℃。
11. The air conditioner controlling method according to any one of claims 1 to 10, wherein when the outer panel temperature variation value Δ T is changedOuter plateNot higher than the fourth temperature T4Interrupting the intervention control of the opening degree of the expansion valve,
wherein the fourth temperature T4T is not less than-1 DEG C4≤1℃。
12. The air conditioner controlling method according to any one of claims 1 to 10, wherein when the expansion valve opening degree P is not less than the expansion valve maximum opening degree Pmax3/4, intervention control of the expansion valve opening is interrupted.
13. The air conditioner controlling method according to any one of claims 1 to 10, wherein when the outdoor ambient temperature T is higher than the predetermined temperature TOuter ringNot less than TRated valueWhen the control intervention on the opening degree of the expansion valve is interrupted.
14. The utility model provides an air conditioner postpones controlling means that frosts which characterized in that is applied to an air conditioner, air conditioner postpones frosting controlling means includes:
an acquisition unit for acquiring an outdoor ambient temperature TOuter ringOuter disc temperature variation value delta TOuter plate；
A determination unit for obtaining the outdoor environment temperature T according to the obtainedOuter ringOuter disc temperature variation value delta TOuter plateDetermining whether the air conditioner satisfies a frosting condition;
an adjusting unit for adjusting an opening degree of an expansion valve based on the determination result of the determining unit, wherein the air conditioner delayed frosting control apparatus implements the air conditioner control method according to any one of claims 1 to 13.
15. An air conditioner, characterized in that the air conditioner comprises:
a computer-readable storage medium; a processor; and
an air conditioner delayed frosting control device installed in the memory and including one or more software function modules executable by the controller, the air conditioner delayed frosting control device comprising:
an acquisition unit for acquiring an outdoor ambient temperature TOuter ringOuter disc temperature variation value delta TOuter plate；
A determination unit for obtaining the outdoor environment temperature T according to the obtainedOuter ringOuter disc temperature variation value delta TOuter plateDetermining whether the air conditioner satisfies a frosting condition;
an adjusting unit for adjusting an opening degree of an expansion valve based on the determination result of the determining unit, wherein the air conditioner implements the air conditioner control method according to any one of claims 1 to 13.
16. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program that, when read and executed by a processor, implements the air conditioner control method according to any one of claims 1 to 13.
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