CN105157161B - method and device for detecting frosting of air conditioner - Google Patents
method and device for detecting frosting of air conditioner Download PDFInfo
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- CN105157161B CN105157161B CN201510398296.1A CN201510398296A CN105157161B CN 105157161 B CN105157161 B CN 105157161B CN 201510398296 A CN201510398296 A CN 201510398296A CN 105157161 B CN105157161 B CN 105157161B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000004378 air conditioning Methods 0.000 claims description 127
- 230000008859 change Effects 0.000 claims description 91
- 238000001514 detection method Methods 0.000 claims description 41
- 230000002045 lasting effect Effects 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 5
- 230000001351 cycling effect Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 11
- 238000010257 thawing Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- PIRWNASAJNPKHT-SHZATDIYSA-N pamp Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCNC(N)=N)C(N)=O)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CO)NC(=O)[C@H](C)NC(=O)[C@@H](NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](C)N)C(C)C)C1=CC=CC=C1 PIRWNASAJNPKHT-SHZATDIYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention discloses a method and a device for detecting frosting of an air conditioner. Wherein, the method comprises the following steps: when the air conditioner is in a heating mode, detecting whether the phase current of a direct current motor of an outdoor fan of the air conditioner is continuously increased; when the phase current of the direct current motor of the outdoor fan is detected to be continuously increased and the continuously increased duration exceeds a first time threshold, detecting whether the temperature of an outdoor pipe of the air conditioner exceeds a temperature threshold or not; when the temperature of the outdoor pipe exceeds a temperature threshold, it is determined that a condenser of the air conditioner is frosted. The invention solves the technical problem that the judgment of the frosting degree is not accurate when the air conditioner heats in the prior art.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of method and device for detecting air-conditioning frosting.
Background technology
Air-conditioning is a kind of widely used apparatus of air conditioning in people's daily life, temperature, humidity that can be to air
It is adjusted, so as to improve the comfort level of people's living environment.During air-conditioning heating, the temperature of outdoor condenser is relatively low,
In the case where outdoor temperature is relatively low, frost occurs in outdoor condenser, so as to influence the normal use of air-conditioning.Cause
This, in heating mode, the judgement of the frosting situation to outdoor condenser is a weight in automatic air conditionning for air-conditioning work
Want link.
In the existing judgement to condenser frosting, one kind is using fuzzy Judgment rule, specially in operation of air conditioner
After the heating mode scheduled time, that is, think air-conditioning condenser frosting, the program to be defrosted into automatic control air conditioner.
Another kind is by judging that DC fan curent change and condenser temperature determine whether frosting outside air conditioning chamber.For above-mentioned two
Kind of frosting determination methods, exist can not accurately the frosting situation of air-conditioning condenser the problem of, usually there is frostless defrosting or lack
The phenomenon of frost defrosting.Also, because during defrost, outer blower fan is to close, so that can not be from outer blower fan direct current generator
Phase current judges whether frosting finishes.
For it is above-mentioned the problem of, not yet propose effective solution at present.
The content of the invention
The embodiments of the invention provide a kind of method and device for detecting air-conditioning frosting, at least to solve to solve existing skill
In art in air-conditioning heating, inaccurate technical problem is judged frosting degree.
One side according to embodiments of the present invention, there is provided a kind of method for detecting air-conditioning frosting, including：At air-conditioning
When heating mode, whether the phase current for detecting the outdoor fan direct current generator of air-conditioning continues to increase；When detecting outdoor fan
The phase current of direct current generator continues to increase, and when the duration continued to increase exceeds very first time threshold value, detects the outdoor of air conditioner
Whether the temperature of pipe exceedes temperature threshold；When the temperature of outdoor pipe exceedes temperature threshold, the condenser frosting of air conditioner is determined.
Further, before detecting the temperature of outdoor pipe of the air conditioner and whether exceeding temperature threshold, methods described
Also include：During the phase current of the outdoor fan direct current generator continues to increase, detect the phase current and continue
The rate of change of increased value added；When the rate of change for detecting value added that the phase current continues to increase persistently increases, and hold
When the duration of continuous increase exceeds the second time threshold, whether the temperature into the outdoor pipe of air conditioner described in perform detection exceedes institute
The step of stating temperature threshold.
Further, detecting the step of whether the phase current of the outdoor fan direct current generator of air-conditioning continues to increase includes：Inspection
Survey rate of change of the phase current of outdoor fan direct current generator within predetermined amount of time；Wherein, when phase current is in predetermined amount of time
Within rate of change be more than zero when, the phase current of outdoor fan direct current generator is the state continued to increase；When phase current is predetermined
When rate of change within period is less than or equal to zero, the phase current of outdoor fan direct current generator is the state persistently reduced.
Further, the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：Wherein, IPhase currentFor phase current, t is timing time.
Further, the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：ΔI
＞ ISetting, wherein, Δ I is changing value of the phase current within predetermined amount of time of the outdoor fan direct current generator of air-conditioning, ISettingFor
Current variation value set in advance.
Further, the rate of change that the value added that phase current continues to increase is determined by equation below is lasting increase：Wherein, IPhase currentFor phase current, t is timing time.
Further, the rate of change that the value added that phase current continues to increase is determined by equation below is lasting increase：Wherein, Δ I be air-conditioning outdoor fan direct current generator phase current change, IPhase currentFor air-conditioning
The phase current of outdoor fan direct current generator, t are timing time, and Δ t is time change,For the change of phase current set in advance
The value of rate.
Further, it is determined that after the condenser frosting of air conditioner, method also includes：Air-conditioning is controlled to enter defrosting journey
Sequence；After air-conditioning terminates defrosting program, whether the phase current for repeating the outdoor fan direct current generator of detection air-conditioning continues
The step of increase.
Another aspect according to embodiments of the present invention, a kind of device for detecting air-conditioning frosting is additionally provided, including：First inspection
Unit is surveyed, for when air-conditioning is in heating mode, whether the phase current for detecting the outdoor fan direct current generator of air-conditioning persistently to increase
Add；Comparing unit, for continuing to increase when the phase current for detecting outdoor fan direct current generator, and the duration continued to increase exceeds
During very first time threshold value, whether the temperature for detecting the outdoor pipe of air conditioner exceedes temperature threshold；Determining unit, for when outdoor pipe
Temperature when exceeding temperature threshold, determine the condenser frosting of air conditioner.
Further, the device also includes：Second detection unit, for continuing in the phase current of outdoor fan direct current generator
During increased, the rate of change for the value added that detection phase current continues to increase；Connection unit, detect that phase current is held for working as
The rate of change for continuing increased value added persistently increases, and when the duration persistently increased exceed the second time threshold, into execution ratio
Compared with the function of unit.
Further, comparing unit includes：Detection module, for detecting the phase current of outdoor fan direct current generator predetermined
Rate of change within period；Wherein, when the rate of change when phase current within predetermined amount of time is more than zero, outdoor fan direct current
The phase current of motor is the state continued to increase；When rate of change of the phase current within predetermined amount of time is less than or equal to zero, room
The phase current of outer blower fan direct current generator is the state persistently reduced.
Further, the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：Wherein, IPhase currentFor phase current, t is timing time.
Further, the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：ΔI
＞ ISetting, wherein, Δ I is changing value of the phase current within predetermined amount of time of the outdoor fan direct current generator of air-conditioning, ISettingFor
Current variation value set in advance.
Further, the rate of change that the value added that phase current continues to increase is determined by equation below is lasting increase：Wherein, IPhase currentFor phase current, t is timing time.
Further, the rate of change that the value added that phase current continues to increase is determined by equation below is lasting increase：Wherein, Δ I be air-conditioning outdoor fan direct current generator phase current change, IPhase currentFor air-conditioning
The phase current of outdoor fan direct current generator, t are timing time, and Δ t is time change,For the change of phase current set in advance
The value of rate.
Further, the device also includes：Control unit, for controlling air-conditioning to enter defrosting program；Cycling element, it is used for
After air-conditioning terminates defrosting program, the function of the first detection unit is repeated.
In embodiments of the present invention, using when air-conditioning is in heating mode, the outdoor fan direct current generator of air-conditioning is detected
Phase current whether continue to increase；When the phase current for detecting outdoor fan direct current generator continues to increase, and continue to increase when
When length exceeds very first time threshold value, whether the temperature for detecting the outdoor pipe of air conditioner exceedes temperature threshold；When the temperature of outdoor pipe
During more than temperature threshold, the mode of the condenser frosting of air conditioner is determined, is solved in the prior art in air-conditioning heating, to knot
White degree judges inaccurate technical problem.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart of the method for optional detection air-conditioning frosting according to embodiments of the present invention；
Fig. 2 is the phase current of outdoor fan of air-conditioner direct current generator according to embodiments of the present invention and the relation of heat pamp
Figure；
Fig. 3 is the flow chart of the method for another optional detection air-conditioning frosting according to embodiments of the present invention；And
Fig. 4 is a kind of schematic diagram of the device of optional detection air-conditioning frosting according to embodiments of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
Embodiment one
According to embodiments of the present invention, there is provided a kind of embodiment of the method for detecting air-conditioning frosting is, it is necessary to illustrate, attached
The step of flow of figure illustrates can perform in the computer system of such as one group computer executable instructions, though also,
So logical order is shown in flow charts, but in some cases, can be with different from shown by order execution herein
Or the step of description.
Fig. 1 is a kind of flow chart of the method for optional detection air-conditioning frosting according to embodiments of the present invention, such as Fig. 1 institutes
Show, this method comprises the following steps：
Step S102, when air-conditioning is in heating mode, detect air-conditioning outdoor fan direct current generator phase current whether
Continue to increase.
Specifically, after air-conditioning is started shooting, or in operation of air conditioner, it can first judge whether air-conditioning is in heating mode,
When air-conditioning is in heating mode, whether the phase current for starting to detect the outdoor fan direct current generator of air-conditioning continues to increase, and works as sky
Mediate when refrigeration mode, fresh air pattern or other mode of operations, without the outdoor fan direct current generator for detecting air-conditioning
The step of whether phase current continues to increase.
It should be noted that the phase current of the outdoor fan direct current generator of air-conditioning has reacted the load of outdoor fan, it is outdoor
The load of blower fan is bigger, and the phase current of outdoor fan direct current generator is bigger.
Step S104, when the phase current for detecting outdoor fan direct current generator continues to increase, and the duration continued to increase surpasses
When going out very first time threshold value, whether the temperature for detecting the outdoor pipe of air-conditioning exceedes temperature threshold.
Specifically, very first time threshold value can be set in advance, for example, 30 minutes.When outdoor fan direct current generator
When phase current is continued to increase more than very first time threshold value, whether the temperature of sensing chamber's outer tube exceedes temperature threshold.Wherein, temperature threshold
Value can be set in advance.
It should be noted that when the phase current for being unsatisfactory for outdoor fan direct current generator continues to increase more than very first time threshold value
When, then repeat and judge that the phase current of outdoor fan direct current generator continues to increase, and when the duration continued to increase is more than first
Between threshold value the step of.
Step S106, when the temperature of outdoor pipe exceedes temperature threshold, determine the condenser frosting of air-conditioning.
Specifically, the outdoor pipe temperature of air-conditioning is detected, when the temperature of outdoor pipe exceedes default temperature threshold, and is continued
Duration when being more than three time thresholds, determine the condenser frosting of air-conditioning.When be unsatisfactory for outdoor pipe temperature exceed it is default
Temperature threshold, and when lasting duration is more than three time thresholds, then repeat the phase for judging outdoor fan direct current generator
The step of electric current continues to increase, and the duration continued to increase exceedes very first time threshold value.
It should be noted that temperature threshold can be TSetting, the temperature of outdoor pipe can be TOuter tube, work as TOuter tube≤TSettingWhen, can
To determine that the temperature of outdoor pipe exceedes temperature threshold.
By above-mentioned steps S102 to step S106, using when air-conditioning is in heating mode, the outdoor wind of air-conditioning is detected
Whether the phase current of machine direct current generator continues to increase；When the phase current for detecting outdoor fan direct current generator continues to increase, and hold
When continuous increased duration exceeds very first time threshold value, whether the temperature for detecting the outdoor pipe of air conditioner exceedes temperature threshold；Work as room
When the temperature of outer tube exceedes temperature threshold, the mode of the condenser frosting of air conditioner is determined, is solved in the prior art in air-conditioning
During heating, inaccurate technical problem is judged frosting degree.
Alternatively, before step S104, the method that the application provides can also include：
Step S103, during the phase current of outdoor fan direct current generator continues to increase, detection phase current persistently increases
The rate of change of the value added added.
When the rate of change for detecting value added that phase current continues to increase persistently increases, and the duration persistently increased is beyond the
During two time thresholds, the step of whether exceeding temperature threshold into the temperature of outdoor pipe for performing step S104 detection air conditioners.
Specifically, a kind of optional method that the embodiment of the present application provides also includes, in the phase of outdoor fan direct current generator
Electric current continues to increase, and the duration continued to increase exceeds after very first time threshold value, detects the phase electricity of outdoor fan direct current generator
The rate of change of the value added continued to increase of stream, when the duration that the rate of change persistently increases and continues to increase exceeded for the second time
During threshold value, then the step of whether temperature of the outdoor pipe of perform detection air conditioner exceedes temperature threshold, when being unsatisfactory for phase current
When the duration that the rate of change of the value added continued to increase persistently increases and continues to increase exceeds the second time threshold, then repeat to hold
Row judges that the phase current of outdoor fan direct current generator continues to increase, and the duration continued to increase exceedes the step of very first time threshold value
Suddenly.
Alternatively, step S102 can include：
Step S1021, detect rate of change of the phase current of outdoor fan direct current generator within predetermined amount of time.
Wherein, when the rate of change when phase current within predetermined amount of time is more than zero, the phase electricity of outdoor fan direct current generator
The state for flowing to continue to increase；
When rate of change of the phase current within predetermined amount of time is less than or equal to zero, the phase current of outdoor fan direct current generator
For the state of lasting reduction.
Specifically, detect outdoor fan of air-conditioner direct current generator phase current whether continue to increase, can be by sensing chamber outside
Rate of change of the phase current of blower fan direct current generator within predetermined amount of time determines.When the rate of change of phase current is more than zero,
The phase current of outdoor fan direct current generator is continues to increase, when the rate of change of phase current is less than or equal to zero, outdoor fan direct current
The phase current of motor reduces to be lasting.
It is alternatively possible to the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：
Wherein, IPhase currentFor phase current, t is timing time.
Specifically, judging whether phase current continues to increase can be by judging phase current to the first derivative of time come really
It is fixed, when phase current is more than zero to the first derivative of time, it is determined that the phase current of outdoor fan direct current generator is to continue to increase.
It is alternatively possible to the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：
Δ I ＞ ISetting, wherein, Δ I is change of the phase current of the outdoor fan direct current generator of air-conditioning within predetermined amount of time
Change value, ISettingFor current variation value set in advance.
Specifically, judge phase current whether continue to increase can also by judge phase current the scheduled time changing value come
It is determined that when changing value of the phase current within predetermined amount of time is more than the changing value of electric current set in advance, it is determined that outdoor
The phase current of blower fan direct current generator is to continue to increase.
It should be noted that above-mentioned judgement phase current is to the first derivative of time and judges phase current in predetermined amount of time
Changing value, be all to judge that the phase current of outdoor fan direct current generator is a kind of alternatively method continued to increase.
Alternatively, the rate of change that the value added that phase current continues to increase is determined by equation below is lasting increase：
Wherein, IPhase currentFor phase current, t is timing time.
Specifically, judge that the rate of change for the value added that phase current continues to increase can be by judging phase current to the two of the time
Order derivative determines, when phase current is more than zero to the second dervative of time, it is determined that the change of the value added that phase current continues to increase
Rate is lasting increase.
Alternatively, the rate of change that the value added that phase current continues to increase is determined by equation below is lasting increase：
Wherein, IPhase currentFor the change of the phase current of the outdoor fan direct current generator of air-conditioning, it is
The phase current of the outdoor fan direct current generator of air-conditioning, t are timing time, and Δ t is time change,For phase set in advance electricity
The value of the rate of change of stream.
Specifically, judge that the rate of change for the value added that phase current continues to increase can also be by judging in default time phase
The value of the rate of change of electric current and the rate of change of phase current set in advance determines.
It should be noted that above-mentioned judgement phase current is to the second dervative of time and judges the change with the time of phase current
Change is more than rate of change set in advance, is all that the rate of change for judging the value added that phase current continues to increase persistently increases alternatively
Method.
It should also be noted that, Fig. 2 be outdoor fan of air-conditioner direct current generator according to embodiments of the present invention phase current with
The graph of a relation of heat pamp, the application judge frosting situation using the relation of phase current and heat pamp, have prevented frostlessization
The situation of white, few white defrost, improve the heating comfortableness of user.
Alternatively, after step s 106, the method that the application provides can also include：
Step S1071, control air-conditioning enter defrosting program.
Step S1073, after air-conditioning terminates defrosting program, repeat the outdoor fan direct current generator of detection air-conditioning
The step of whether phase current continues to increase.
Specifically, it is determined that after air-conditioning condenser frosting, air-conditioning can be controlled to enter defrosting program.In defrosting EP (end of program)
Afterwards, can enter detection air-conditioning condenser whether next detection method cycle of frosting, the cycle of next detection method
Can be and the application step S102 to S106 identical detection methods.
It should be noted that when air-conditioner continuous operates in the heating mode long period, by the application step S102 extremely
It is multiple that the method for S106 detection air-conditioning frostings can circulate execution.
With reference to above-described embodiment, Fig. 3 is the method for another optional detection air-conditioning frosting according to embodiments of the present invention
Flow chart, a kind of specific embodiment that the application as shown in Figure 3 provides may comprise steps of：
Step S1, judges whether air-conditioning is in heating mode, when air-conditioning is in heating mode, performs step S2, otherwise,
Perform step S6.
Step S2, judgeAnd t>t1Whether set up, whenAnd t>t1When, perform step
S3, otherwise repeat step S2.
Step S3, judgeAnd t>t2Whether set up, whenAnd t>t2When, perform step
Rapid S4, otherwise repeat step S2.
Step S4, judges TOuter tube≤TSetting, and t>t3Whether set up, work as TOuter tube≤TSettingAnd t>t3When, step S5 is performed,
Otherwise step S2 is repeated.
Step S5, air-conditioning condenser frosting is determined, into defrost pattern.
Step S6, exit the determining program of air-conditioning condenser frosting.
It should be noted that IPhase currentFor the phase current, t is timing time, t1Can be first in the embodiment of the present application
Time threshold, t2Can be the second time threshold in the embodiment of the present application, t3It can be the 3rd time threshold in the embodiment of the present application
Value.TSettingCan be temperature threshold in the embodiment of the present application, TOuter tubeIt can be the temperature of outdoor pipe in the embodiment of the present application.
Embodiment two
According to embodiments of the present invention, a kind of device embodiment for detecting air-conditioning frosting is additionally provided, it is necessary to which explanation, is somebody's turn to do
The device of detection air-conditioning frosting can be used for the method for the detection air-conditioning frosting for realizing the embodiment of the present invention, the embodiment of the present invention
The method of detection air-conditioning frosting can also be performed by the device of the detection air-conditioning frosting, be entered in the inventive method embodiment
Went explanation repeat no more.
Fig. 3 is a kind of schematic diagram of the device of optional detection air-conditioning frosting according to embodiments of the present invention, such as Fig. 3 institutes
Show, the device includes：
First detection unit 40, for when air-conditioning is in heating mode, detecting the outdoor fan direct current generator of air-conditioning
Whether phase current continues to increase.
Specifically, after air-conditioning is started shooting, or in operation of air conditioner, it can first judge whether air-conditioning is in heating mode,
When air-conditioning is in heating mode, the first detection unit 40 start detect air-conditioning outdoor fan direct current generator phase current whether
Continue to increase, when air-conditioning is in refrigeration mode, fresh air pattern or other mode of operations, the first detection unit 40 does not perform inspection
Survey the function whether phase current of the outdoor fan direct current generator of air-conditioning continues to increase.
Comparing unit 42, for continuing to increase when the phase current for detecting outdoor fan direct current generator, and continue to increase
When duration exceeds very first time threshold value, whether the temperature for detecting the outdoor pipe of air conditioner exceedes temperature threshold.
Specifically, very first time threshold value can be set in advance, for example, 30 minutes.When outdoor fan direct current generator
When phase current is continued to increase more than very first time threshold value, whether the temperature of the sensing chamber's outer tube of comparing unit 42 exceedes temperature threshold.
Wherein, temperature threshold can be set in advance.
It should be noted that temperature threshold can be TSetting, the temperature of outdoor pipe can be TOuter tube, work as TOuter tube≤TSettingWhen, can
To determine that the temperature of outdoor pipe exceedes temperature threshold.
It should be noted that when the phase current for being unsatisfactory for outdoor fan direct current generator continues to increase more than very first time threshold value
When, then repeat comparing unit 42 and judge that the phase current of outdoor fan direct current generator continues to increase, and the duration continued to increase
More than the function of very first time threshold value.
Determining unit 44, for when the temperature of outdoor pipe exceedes temperature threshold, determining the condenser frosting of air conditioner.
Specifically, the outdoor pipe temperature of air-conditioning is detected, when the temperature of outdoor pipe exceedes default temperature threshold, and is continued
Duration when being more than three time thresholds, determine the condenser frosting of air-conditioning.When be unsatisfactory for outdoor pipe temperature exceed it is default
Temperature threshold, and when lasting duration is more than three time thresholds, then repeats comparing unit 42 and judge that outdoor fan is straight
The phase current of stream motor continues to increase, and the duration continued to increase exceedes the function of very first time threshold value.
By above-mentioned comparing unit 42, for continuing to increase when the phase current for detecting outdoor fan direct current generator, and hold
When continuous increased duration exceeds very first time threshold value, whether the temperature for detecting the outdoor pipe of air conditioner exceedes temperature threshold；Compare
Unit 42, for continuing to increase when the phase current for detecting outdoor fan direct current generator, and the duration continued to increase exceeds first
During time threshold, whether the temperature for detecting the outdoor pipe of air conditioner exceedes temperature threshold；Determining unit 44, for when outdoor pipe
When temperature exceedes temperature threshold, the mode of the condenser frosting of air conditioner is determined, is solved in the prior art in air-conditioning heating,
Inaccurate technical problem is judged frosting degree.
Alternatively, the device can also include：
Second detection unit, during continuing to increase in the phase current of outdoor fan direct current generator, detection is mutually electric
The rate of change for the value added that stream continues to increase.
Connection unit, the rate of change of the value added continued to increase for that ought detect phase current persistently increase, and lasting increasing
When big duration exceeds the second time threshold, into the function of performing comparing unit 42.
Specifically, the rate of change of the value added continued to increase of the phase current of outdoor fan direct current generator is detected, when the change
When the duration that rate persistently increases and continues to increase exceeds the second time threshold, then the room of comparing unit detection air conditioner is performed
Whether the temperature of outer tube exceedes the function of temperature threshold, when the rate of change for the value added continued to increase for being unsatisfactory for phase current continues
When the duration for increasing and continuing to increase exceeds the second time threshold, then repeat comparing unit 42 and judge outdoor fan direct current
The phase current of motor continues to increase, and the duration continued to increase exceedes the function of very first time threshold value.
Alternatively, comparing unit 42 includes：
Detection module, for detecting rate of change of the phase current of outdoor fan direct current generator within predetermined amount of time；Its
In, when rate of change of the phase current within predetermined amount of time is more than zero, the phase current of outdoor fan direct current generator increases to be lasting
The state added；When rate of change of the phase current within predetermined amount of time is less than or equal to zero, the phase electricity of outdoor fan direct current generator
The state for flowing persistently to reduce.
Specifically, whether the phase current that outdoor fan of air-conditioner direct current generator is detected by detection module continues to increase, can be with
Determined by detecting rate of change of the phase current of outdoor fan direct current generator within predetermined amount of time.When the change of phase current
When rate is more than zero, the phase current of outdoor fan direct current generator is continues to increase, when the rate of change of phase current is less than or equal to zero, room
The phase current of outer blower fan direct current generator reduces to be lasting.
Alternatively, the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：
Wherein, IPhase currentFor phase current, t is timing time.
Specifically, judging whether phase current continues to increase can be by judging phase current to the first derivative of time come really
It is fixed, when phase current is more than zero to the first derivative of time, it is determined that the phase current of outdoor fan direct current generator is to continue to increase.
Alternatively, the phase current that the outdoor fan direct current generator of air-conditioning is determined by equation below is to continue to increase：
Δ I ＞ ISetting, wherein, Δ I is change of the phase current of the outdoor fan direct current generator of air-conditioning within predetermined amount of time
Change value, ISettingFor current variation value set in advance.
Specifically, judge phase current whether continue to increase can also by judge phase current the scheduled time changing value come
It is determined that when changing value of the phase current within predetermined amount of time is more than the changing value of electric current set in advance, it is determined that outdoor
The phase current of blower fan direct current generator is to continue to increase.
It is alternatively possible to determine that the rate of change for the value added that phase current continues to increase is lasting increase by equation below：
Wherein, IPhase currentFor phase current, t is timing time.
Specifically, judge that the rate of change for the value added that phase current continues to increase can be by judging phase current to the two of the time
Order derivative determines, when phase current is more than zero to the second dervative of time, it is determined that the change of the value added that phase current continues to increase
Rate is lasting increase.
It is alternatively possible to determine that the rate of change for the value added that phase current continues to increase is lasting increase by equation below：
Wherein, Δ I be air-conditioning outdoor fan direct current generator phase current change, IPhase current
For the phase current of the outdoor fan direct current generator of air-conditioning, t is timing time, and Δ t is time change,For phase set in advance
The value of the rate of change of electric current.
Specifically, judge that the rate of change for the value added that phase current continues to increase can also be by judging in default time phase
The value of the rate of change of electric current and the rate of change of phase current set in advance determines.
Alternatively, the device can also include：
Control unit, for controlling air-conditioning to enter defrosting program.
Cycling element, after terminating defrosting program in air-conditioning, repeat the function of the first detection unit 40.
Specifically, it is determined that after air-conditioning condenser frosting, control unit can control air-conditioning to enter defrosting program.In air-conditioning
Continuous service in the heating mode long period, can control Air-conditioning Cycle perform the first detection unit 40, comparing unit 42 with
And the function of determining unit 44.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, it may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, others can be passed through
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (16)
- A kind of 1. method for detecting air-conditioning frosting, it is characterised in that including：When air-conditioning is in heating mode, whether the phase current for detecting the outdoor fan direct current generator of the air-conditioning continues to increase；When the phase current for detecting the outdoor fan direct current generator continues to increase, and the duration continued to increase exceeds first During time threshold, whether the temperature for detecting the outdoor pipe of the air-conditioning exceedes temperature threshold；When the temperature of the outdoor pipe exceedes the temperature threshold, the condenser frosting of the air-conditioning is determined.
- 2. according to the method for claim 1, it is characterised in that whether surpass in the temperature for the outdoor pipe for detecting the air conditioner Before excess temperature threshold value, methods described also includes：During the phase current of the outdoor fan direct current generator continues to increase, detect the phase current and continue to increase Value added rate of change；When the rate of change for detecting value added that the phase current continues to increase persistently increases, and the duration persistently increased is beyond the During two time thresholds, the step of whether exceeding the temperature threshold into the temperature of the outdoor pipe of air conditioner described in perform detection.
- 3. according to the method for claim 1, it is characterised in that detect the phase electricity of the outdoor fan direct current generator of the air-conditioning The step of whether stream continues to increase includes：Detect rate of change of the phase current of the outdoor fan direct current generator within predetermined amount of time；Wherein, when the rate of change when the phase current within the predetermined amount of time is more than zero, the outdoor fan direct current The phase current of machine is the state continued to increase；When rate of change of the phase current within the predetermined amount of time is less than or equal to zero, the outdoor fan direct current generator The phase current be the state that persistently reduces.
- 4. according to the method for claim 3, it is characterised in that determine that the outdoor fan of the air-conditioning is straight by equation below The phase current of stream motor is to continue to increase：Wherein, IPhase currentFor the phase current, t is timing time.
- 5. according to the method for claim 3, it is characterised in that determine that the outdoor fan of the air-conditioning is straight by equation below The phase current of stream motor is to continue to increase：Δ I ＞ ISetting, wherein, Δ I is the phase current of the outdoor fan direct current generator of the air-conditioning in the predetermined amount of time Within changing value, ISettingFor current variation value set in advance.
- 6. according to the method for claim 2, it is characterised in that determine what the phase current continued to increase by equation below The rate of change of value added is lasting increase：Wherein, IPhase currentFor the phase current, t is timing time.
- 7. according to the method for claim 2, it is characterised in that determine what the phase current continued to increase by equation below The rate of change of value added is lasting increase：Wherein, Δ I is the change of the phase current of the outdoor fan direct current generator of the air-conditioning, IPhase currentFor the phase current of the outdoor fan direct current generator of the air-conditioning, t is timing time, and Δ t is time change,For The value of the rate of change of the phase current set in advance.
- 8. according to the method for claim 1, it is characterised in that it is determined that after the condenser frosting of the air conditioner, institute Stating method also includes：The air-conditioning is controlled to enter defrosting program；After the air-conditioning terminates the defrosting program, the phase for the outdoor fan direct current generator for detecting the air-conditioning is repeated The step of whether electric current continues to increase.
- A kind of 9. device for detecting air-conditioning frosting, it is characterised in that including：First detection unit, for when air-conditioning is in heating mode, detecting the phase of the outdoor fan direct current generator of the air-conditioning Whether electric current continues to increase；Comparing unit, for continuing to increase when the phase current for detecting the outdoor fan direct current generator, and continue to increase Duration when exceeding very first time threshold value, whether the temperature for detecting the outdoor pipe of the air conditioner exceedes temperature threshold；Determining unit, for when the temperature of the outdoor pipe exceedes the temperature threshold, determining the condenser of the air conditioner Frosting.
- 10. device according to claim 9, it is characterised in that described device also includes：Second detection unit, during continuing to increase in the phase current of the outdoor fan direct current generator, detection The rate of change for the value added that the phase current continues to increase；Connection unit, the rate of change of the value added continued to increase for that ought detect the phase current persistently increase, and lasting increasing When big duration exceeds the second time threshold, into the function of performing the comparing unit.
- 11. device according to claim 9, it is characterised in that the comparing unit includes：Detection module, for detecting change of the phase current of the outdoor fan direct current generator within predetermined amount of time Rate；Wherein, when the rate of change when the phase current within the predetermined amount of time is more than zero, the outdoor fan direct current The phase current of machine is the state continued to increase；When rate of change of the phase current within the predetermined amount of time is less than or equal to zero, the outdoor fan direct current generator The phase current be the state that persistently reduces.
- 12. device according to claim 11, it is characterised in that the outdoor fan of the air-conditioning is determined by equation below The phase current of direct current generator is to continue to increase：Wherein, IPhase currentFor the phase current, t is timing time.
- 13. device according to claim 11, it is characterised in that the outdoor fan of the air-conditioning is determined by equation below The phase current of direct current generator is to continue to increase：Δ I ＞ ISetting, wherein, Δ I is the phase current of the outdoor fan direct current generator of the air-conditioning in the predetermined amount of time Within changing value, ISettingFor current variation value set in advance.
- 14. device according to claim 10, it is characterised in that determine that the phase current continues to increase by equation below The rate of change of value added be lasting increase：Wherein, IPhase currentFor the phase current, t is timing time.
- 15. device according to claim 10, it is characterised in that determine that the phase current continues to increase by equation below The rate of change of value added be lasting increase：Wherein, Δ I is the change of the phase current of the outdoor fan direct current generator of the air-conditioning, IPhase currentFor the phase current of the outdoor fan direct current generator of the air-conditioning, t is timing time, and Δ t is time change,For The value of the rate of change of the phase current set in advance.
- 16. device according to claim 9, it is characterised in that described device also includes：Control unit, for controlling the air-conditioning to enter defrosting program；Cycling element, after terminating the defrosting program in the air-conditioning, repeat the work(of first detection unit Energy.
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| CN201510398296.1A CN105157161B (en) | 2015-07-07 | 2015-07-07 | method and device for detecting frosting of air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105571245B (en) * | 2016-01-28 | 2017-12-08 | 珠海格力电器股份有限公司 | Air conditioner frosting judgment method and device and air conditioning system |
| CN106288144A (en) * | 2016-07-26 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner and Defrost method thereof |
| CN107270472B (en) * | 2017-06-05 | 2019-10-15 | 广东美的暖通设备有限公司 | Method for controlling number of revolution, revolution speed control system and air-conditioning |
| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
| CN107166688A (en) * | 2017-07-10 | 2017-09-15 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN108317669B (en) * | 2018-02-14 | 2020-08-25 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
| CN108397873A (en) * | 2018-02-14 | 2018-08-14 | 青岛海尔空调器有限总公司 | Indoor unit anti-freeze control method for air conditioner |
| CN110986282B (en) * | 2019-11-22 | 2021-07-13 | 珠海格力电器股份有限公司 | Heat pump air conditioner frosting judgment method, computer readable storage medium and air conditioner |
| CN111981640B (en) * | 2020-08-19 | 2022-05-10 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device, air conditioner and storage medium |
| CN112032941A (en) * | 2020-08-25 | 2020-12-04 | 海信（山东）空调有限公司 | Control method of air conditioner |
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