CN110030666A - A kind of defrosting control method, device and air conditioner - Google Patents
A kind of defrosting control method, device and air conditioner Download PDFInfo
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- CN110030666A CN110030666A CN201910323782.5A CN201910323782A CN110030666A CN 110030666 A CN110030666 A CN 110030666A CN 201910323782 A CN201910323782 A CN 201910323782A CN 110030666 A CN110030666 A CN 110030666A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Defrosting control method, device and air conditioner provided by the invention, are related to air-conditioning technical field.This method and device are after air conditioner enters the first preset time of heating mode, obtain at least two groups observed pressure value in the second preset time, and base pressure force value is determined according at least two groups observed pressure value, the current pressure values and base pressure force value for being then based on acquisition determine pressure change rate；And when pressure change rate meet it is presetting enter defrost condition when, into defrost pattern.Due to can all redefine base pressure force value after air conditioner enters heating mode every time, to avoid influence of the environmental factors such as dust to base pressure force value.Meanwhile the truth of outer machine frosting is judged by the pressure change rate of dynamic pressure or static pressure on the inside of outdoor heat exchanger, by outdoor environment, this factor is not influenced, more accurate.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of defrosting control method, device and air conditioner.
Background technique
In heating operation, outer machine condenser constantly absorbs heat daily air-conditioning, and the vapor in air can be in condenser fin
Upper condensation frosts, and when frost layer to certain thickness, will affect the heat transfer effect of outer machine, so heating operation will do it one for a period of time
Secondary defrost.
In the prior art, air conditioner mostly uses the variation of outer machine coil temperature greatly to identify outer machine frosting situation, and carries out
Defrost.It, can the factors such as honest and kind environment temperature and air quantity but since outer machine coil temperature only reflects the variation of outdoor heat exchanger temperature
Influence, therefore the truth of outer machine frosting can not be accurately identified by outer machine coil temperature, so as to cause frequent defrost, shadow
Ring the comfort of user.
Summary of the invention
Problems solved by the invention is how to accurately identify outer machine frosting situation.
To solve the above problems, in a first aspect, the present invention provides a kind of defrosting control method, the defrosting control method
Include:
After air conditioner enters the first preset time of heating mode, at least two groups actual measurement in the second preset time is obtained
Pressure value, wherein the observed pressure value is the dynamic pressure value or static pressure on the inside of outdoor heat exchanger；
Base pressure force value is determined according at least two groups observed pressure value；
Into after the third preset time of heating mode, obtain current pressure values, wherein the current pressure values with it is described
Observed pressure value is corresponding；
Pressure change rate is determined based on the current pressure values and the base pressure force value；
When the pressure change rate meets presetting entrance defrost condition, into defrost pattern.
It is to be appreciated that base pressure force value can be all redefined due to after air conditioner enters heating mode every time, thus
Avoid influence of the environmental factors such as dust to base pressure force value.Meanwhile passing through the pressure of dynamic pressure or static pressure on the inside of outdoor heat exchanger
Power change rate judges the truth of outer machine frosting, and by outdoor environment, this factor is not influenced, more accurate.
Further, the method also includes: if the observed pressure value be the outdoor heat exchanger on the inside of dynamic pressure value,
Then when the pressure change rate is less than or equal to the first presetting dynamic pressure change threshold, judge that the pressure change rate meets
The presetting entrance defrost condition.
It is to be appreciated that when observed pressure value be outdoor heat exchanger on the inside of dynamic pressure value when, since base pressure force value is root
Factually measuring pressure value is calculated, and current pressure values are corresponding with observed pressure value, thus base pressure force value and current pressure
Force value is actually dynamic pressure, and when the pressure change rate of dynamic pressure is less than or equal to the first presetting dynamic pressure change threshold,
Show that dynamic pressure decline is more, reflects that outdoor unit frosting has reached certain thickness, need to carry out defrost.
Further, after entering the defrost pattern, the method also includes:
When the pressure change rate is greater than or equal to the second presetting dynamic pressure change threshold, the defrost mould is exited
Formula.
It is to be appreciated that when the pressure change rate of dynamic pressure is greater than or equal to the second presetting dynamic pressure change threshold, table
Wind speed on the inside of bright dynamic pressure rising namely outdoor heat exchanger increases, and reflects that the frost layer of outdoor unit is melted, so as to
Exit defrost pattern.
Further, the method also includes: if the observed pressure value be the outdoor heat exchanger on the inside of static pressure,
Then when the pressure change rate is greater than or equal to the first presetting static pressure change threshold, judge that the pressure change rate meets
The presetting entrance defrost condition.
It is to be appreciated that when observed pressure value be outdoor heat exchanger on the inside of static pressure when, since base pressure force value is root
Factually measuring pressure value is calculated, and current pressure values are corresponding with observed pressure value, thus base pressure force value and current pressure
Force value is actually static pressure, and when the pressure change rate of static pressure is greater than or equal to the first presetting static pressure change threshold,
Show that static pressure decline is more, reflects that outdoor unit frosting has reached certain thickness, need to carry out defrost.
Further, after entering the defrost pattern, the method also includes:
When the pressure change rate is less than or equal to the second presetting static pressure change threshold, the defrost mould is exited
Formula.
It is to be appreciated that when the pressure change rate of static pressure is less than or equal to the second presetting static pressure change threshold, table
Wind speed on the inside of bright static pressure decline namely outdoor heat exchanger increases, and reflects that the frost layer of outdoor unit is melted, so as to
Exit defrost pattern.
Further, the step of acquisition current pressure values include:
The current pressure values are obtained according to presetting period first time；
It is described when the pressure change rate meet it is presetting enter defrost condition when enter defrost pattern the step of include:
If the pressure change rate meets presetting entrance defrost condition in presetting second time period, into
Enter the defrost pattern, wherein the second time period is the presupposition multiple in period first time.
It is to be appreciated that pressure change rate is all satisfied presetting entrance defrost item in presetting second time period
Under the premise of part, defrost pattern just can enter, can be avoided the influence of the current pressure values of individual inaccuracy, reduce False Rate,
It avoids frequently entering defrost pattern, promotes the comfort of user.
Further, described the step of determining base pressure force value according at least two groups observed pressure value, includes:
By the maximum value in at least two groups observed pressure value, rejected in at least two groups observed pressure value and most
The average value of the remaining observed pressure value is determined as the base pressure force value after small value.
It is to be appreciated that determining base pressure force value using the above method, the observed pressure value of individual inaccuracy can be reduced
Influence for base pressure force value.
Further, the method also includes:
Obtain current outdoor environment temperature；
It is described when the pressure change rate meet it is presetting enter defrost condition when enter defrost pattern the step of include:
When the pressure change rate meets presetting entrance defrost condition and the current outdoor environment temperature less than pre-
When the temperature threshold of setting, into the defrost pattern.
Second aspect, the present invention also provides a kind of defrosting control device, the defrosting control device includes:
Parameter acquisition module, for after air conditioner enters the first preset time of heating mode, obtain second it is default when
Interior at least two groups observed pressure value, wherein the observed pressure value is the dynamic pressure value or static pressure on the inside of outdoor heat exchanger；
Computing module, for determining base pressure force value according at least two groups observed pressure value；
The parameter acquisition module is also used to after the air conditioner enters the third preset time of heating mode, and acquisition is worked as
Preceding pressure value, wherein the current pressure values are corresponding with the observed pressure value；
The computing module is also used to determine pressure change rate based on the current pressure values and the base pressure force value；
Mode switch module, for when the pressure change rate meet it is presetting enter defrost condition when, into defrost
Mode.
The third aspect, the present invention also provides a kind of air conditioners, including controller, outdoor heat exchanger and pressure sensing
Device, the pressure sensor are electrically connected with the controller, and the pressure sensor is set on the inside of the outdoor heat exchanger；
The pressure sensor is used to acquire the pressure value on the inside of the outdoor heat exchanger in real time；
The pressure sensor was also used to according to presetting period first time, according to adopting in period first time
The pressure value of collection determines observed pressure value, and the observed pressure value is transmitted to the controller；
The controller is used for after air conditioner enters the first preset time of heating mode, is obtained in the second preset time
At least two groups observed pressure value, wherein the observed pressure value be outdoor heat exchanger on the inside of dynamic pressure value or static pressure；
The controller is also used to determine base pressure force value according at least two groups observed pressure value；
The controller is also used into after the third preset time of heating mode, obtains current pressure values, wherein described
Current pressure values are corresponding with the observed pressure value；
The controller is also used to determine pressure change rate based on the current pressure values and the base pressure force value；
The controller is also used to when the pressure change rate meets presetting entrance defrost condition, into defrost mould
Formula.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for air conditioner that invention provides.
Fig. 2 is the flow chart of defrosting control method provided by the invention.
Fig. 3 is dynamic pressure change curve.
Fig. 4 is static pressure change curve.
Fig. 5 is a kind of functional block diagram of defrosting control device provided by the invention.
Icon: 100- air conditioner；110- controller；120- pressure sensor；130- temperature sensor；140- outdoor heat exchange
Device；The outer blower of 150-；160- throttling set；170- indoor heat exchanger；The auxiliary heat of 180- electricity；190- inner blower；210- four-way valve；
220- compressor；300- defrosting control device；310- parameter acquisition module；320- computing module；330- mode switch module.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
The present invention provides a kind of air conditioners, for the pressure change according to dynamic pressure or static pressure on the inside of outdoor heat exchanger
Rate accurately identifies outdoor frosting situation.
Referring to Fig. 1, being a kind of structural schematic diagram of air conditioner 100 provided by the invention.Wherein, air conditioner 100 includes
Controller 110, pressure sensor 120, temperature sensor 130, indoor heat exchanger 170, electricity be auxiliary hot 180, inner blower 190, four-way
Valve 210, outdoor heat exchanger 140, outer blower 150, throttling set 160 and compressor 220.Wherein, controller 110 and pressure pass
Sensor 120 and temperature sensor 130 are electrically connected, indoor heat exchanger 170, four-way valve 210, compressor 220, four-way valve 210, room
External heat exchanger 140 and throttling set 160 are sequentially communicated and are formed close access, and inner blower 190 and indoor heat exchanger 170 are opposite
Setting, and electricity auxiliary hot 180 is set between inner blower 190 and indoor heat exchanger 170, outer blower 150 and 140 phase of outdoor heat exchanger
To setting, pressure sensor 120 is set to 140 inside of outdoor heat exchanger, and temperature sensor 130 is set to outdoor heat exchanger 140
Outside.
The present invention provides a kind of defrosting control methods, are applied to above-mentioned air conditioner 100, for according to outdoor heat exchanger
The dynamic pressure of 140 insides or the pressure change rate of static pressure, accurately identify outdoor frosting situation.Referring to Fig. 2, being provided for the present invention
Defrosting control method flow chart.The defrosting control method includes:
S201 is obtained in the second preset time at least after the first preset time that air conditioner 100 enters heating mode
Two groups of observed pressure values.
Wherein, observed pressure value is the dynamic pressure value or static pressure of 140 inside of outdoor heat exchanger.Specifically, observed pressure value
It is to be acquired and transmitted by pressure sensor 120.Pressure sensor 120 can acquire the pressure of 140 inside of outdoor heat exchanger in real time
Value, and according to presetting period first time, observed pressure value is determined according to the pressure value acquired in period first time, and
Observed pressure value is transmitted to controller 110.
That is, pressure sensor 120 and it is indirect collected pressure value is transferred directly to controller 110, but need
Observed pressure value first is obtained after the processing of removal error to initial data, then observed pressure value is transferred to controller
110.For example, the every 500ms of pressure sensor 120 acquires a pressure value, but not every 500ms is sent once to controller 110
Pressure value, but need every 5s, by 10 groups of pressure values in this 5s, after rejecting maximum value and minimum value, to remaining pressure
Value is averaging processing to obtain observed pressure value, then observed pressure value is transmitted to controller 110.
In addition, pressure sensor 120 will start to acquire data, and to control after air conditioner 100 enters heating mode
Device 110 processed sends observed pressure value, but when air conditioner 100 has just entered heating mode, the fluctuation of observed pressure value is larger, with this
When observed pressure value judge the actual conditions of outdoor frosting, there are biggish errors.Therefore, enter in air conditioner 100 and heat
After first preset time of mode, the operating status of air conditioner 100 is more steady, is obtained in the second preset time again at this time
At least two groups observed pressure value, and base pressure force value is determined according at least two groups observed pressure value, more accurately, more fitting is real
Border.
S202 determines base pressure force value according at least two groups observed pressure value.
Specifically, when only including two groups of observed pressure values, on the basis of the average value of two groups of observed pressure values can be determined
Pressure value.
When including three groups or more of observed pressure value, by three groups or more of observed pressure value, three groups or more will be rejected
Observed pressure value in maximum value and minimum value after the average value of remaining observed pressure value be determined as base pressure force value.
That is, the actual pressure value after controller 110 and indirect 100 even running using air conditioner is as reference pressure
Value, but need to determine base pressure force value according at least two groups observed pressure value, further reduce the actual measurement of individual inaccuracy
Influence of the pressure value for base pressure force value.
For example, the first preset time is 3min, the second preset time is 5min, namely when air conditioner 100 enters heating mould
After formula 3min, start obtain observed pressure value, after 5min, obtain 10 groups of observed pressure values be respectively as follows: (48pa, 49pa,
52pa, 50pa, 53pa, 48pa, 52pa, 49pa, 51pa, 50pa), remove remaining actual measurement after maximum value and minimum value therein
Pressure value is respectively as follows: (49pa, 52pa, 50pa, 48pa, 52pa, 49pa, 51pa, 50pa), and is averaged 50pa as benchmark
Pressure value.
S203 obtains current pressure values into after the third preset time of heating mode.
Wherein, current pressure values are corresponding with observed pressure value.That is, if observed pressure value is dynamic pressure value, currently
Pressure value is also dynamic pressure value；If observed pressure value is static pressure, current pressure values also static pressure.By make current pressure values with
Observed pressure value is corresponding, may make that current pressure values are corresponding with base pressure force value, otherwise with the base pressure force value and static pressure of dynamic pressure
Current pressure values determine pressure change rate, and the case where judge defrost situation with this, erroneous judgement can be generated.
Wherein, third preset time be at least greater than or equal to the first preset time and the second preset time and.That is,
After base pressure force value has been determined, it can just start to obtain current pressure values.
S204 determines pressure change rate based on current pressure values and base pressure force value.
Specifically, current pressure values, base pressure force value and pressure change rate meet formula:Wherein, η is pressure
Power change rate, PdFor current pressure values, PbFor benchmark pressure value.
S205, when pressure change rate meets presetting entrance defrost condition, into defrost pattern.
If observed pressure value is the dynamic pressure value of 140 inside of outdoor heat exchanger, preset when pressure change rate is less than or equal to
When fixed first dynamic pressure change threshold, judges that pressure change rate meets and presetting enter defrost condition.
Referring to Fig. 3, being dynamic pressure change curve.In non-frosting, the wind speed of the location of pressure sensor 120 compared with
Height, so dynamic pressure value at this time is higher；And after frosting, the wind speed of the location of pressure sensor 120 with frost layer thickness
The increase of degree and be gradually reduced, cause dynamic pressure to decline.To when the pressure change rate of dynamic pressure is less than or equal to presetting first
When dynamic pressure change threshold, shows that dynamic pressure decline is more, reflect that outdoor unit frosting has reached certain thickness, changed
Frost.
Specifically, the range of the first dynamic pressure change threshold is 50%-80%.In a kind of optional embodiment, first
Dynamic pressure change threshold is 60%.
If observed pressure value is the static pressure of 140 inside of outdoor heat exchanger, preset when pressure change rate is greater than or equal to
When fixed first static pressure change threshold, judges that pressure change rate meets and presetting enter defrost condition.
Referring to Fig. 4, being static pressure change curve.In non-frosting, the wind speed of the location of pressure sensor 120 compared with
Height, so static pressure at this time is lower；And after frosting, the wind speed of the location of pressure sensor 120 with frost layer thickness
The increase of degree and be gradually reduced, cause static pressure to increase.To when the pressure change rate of static pressure is greater than or equal to presetting first
When static pressure change threshold, it is more to show that static pressure rises, reflects that outdoor unit frosting has reached certain thickness, is changed
Frost.
Specifically, the range of the first static pressure change threshold is 120%-150%.In a kind of optional embodiment, the
One static pressure change threshold is 140%.
In a preferred embodiment, defrosting control method provided by the invention will also combine current outdoor environment temperature
Degree judges the frosting situation of outer machine, and obtains the condition into defrost pattern in conjunction with current outdoor environment temperature.
Specifically, when pressure change rate meets presetting entrance defrost condition and current outdoor environment temperature less than default
When fixed temperature threshold, into defrost pattern.
It is to be appreciated that showing current state under the premise of pressure change rate meets presetting entrance defrost condition
A possibility that outer machine frosting, is very high, while current outdoor environment temperature is less than presetting temperature threshold, shows outdoor environment temperature
Spend lower, further a possibility that proving outdoor unit frosting, hence into defrost pattern.
It should be noted that the current environmental temperature obtained is that temperature sensor 130 is acquired and transmitted.In addition, one
In the optional embodiment of kind, presetting temperature threshold is 5 degrees Celsius.
S206 exits defrost when pressure change rate meets presetting when exiting defrost condition.
Specifically, if observed pressure value is the dynamic pressure value of 140 inside of outdoor heat exchanger, when pressure change rate is greater than or waits
When the second presetting dynamic pressure change threshold, defrost pattern is exited.
That is, judging pressure change rate when pressure change rate is greater than or equal to the second presetting dynamic pressure change threshold
Meet and presetting exits defrost condition.It is to be appreciated that the pressure change rate when dynamic pressure is greater than or equal to presetting second
When dynamic pressure change threshold, shows that dynamic pressure rises namely the wind speed of 140 inside of outdoor heat exchanger increases, reflect the frost of outdoor unit
Layer is melted, so as to exit defrost pattern.
In a preferred embodiment, the second dynamic pressure change threshold is 90%.
If observed pressure value is the static pressure of 140 inside of outdoor heat exchanger, preset when pressure change rate is less than or equal to
When fixed second static pressure change threshold, defrost pattern is exited.
That is, judging pressure change rate when pressure change rate is less than or equal to the second presetting static pressure change threshold
Meet and presetting exits defrost condition.It is to be appreciated that the pressure change rate when static pressure is less than or equal to presetting second
When static pressure change threshold, shows that the wind speed of 140 inside of static pressure decline namely outdoor heat exchanger increases, reflect the frost of outdoor unit
Layer is melted, so as to exit defrost pattern.
In a preferred embodiment, the second static pressure change threshold is 110%.
In a kind of optional embodiment, in order to more accurately judge outdoor frosting situation.The S203 can include: according to
Presetting period first time obtains current pressure values.If the S205 includes: the pressure in presetting second time period
When change rate meets presetting entrance defrost condition, into defrost pattern.
Wherein, second time period is the presupposition multiple in period first time.It is to be appreciated that second time period can root
According to the demand self-setting of user.
Period first time is the period for obtaining current pressure values, and second time period is to judge whether to enter defrost mould
The period of formula makes the presupposition multiple in second time period period first time, can reduce False Rate.Specifically, primary
In the defrost period, frosting situation is not judged with the pressure change rate at a certain moment, but it is that accumulation repeatedly judges as a result, namely
In presetting second time period pressure change rate be all satisfied it is presetting enter defrost condition under the premise of, just can enter
White mode can be avoided the influence of the current pressure values of individual inaccuracy, reduce False Rate, avoid frequently entering defrost pattern,
Promote the comfort of user.
For example, controller 110 continuously determines pressure change rate in 5 periods first time (namely second time period)
Be all satisfied it is presetting enter defrost condition, while when current outdoor environment temperature is less than presetting temperature threshold, Cai Huijin
Enter defrost pattern.
In order to execute the corresponding steps in above-described embodiment and each possible mode, a kind of defrosting control dress is given below
300 implementation is set, optionally, which can use the device of above-mentioned controller 110 shown in FIG. 1
Structure.Further, referring to Fig. 5, Fig. 5 is a kind of functional block diagram of defrosting control device 300 provided by the invention.It needs
Illustrate, defrosting control device 300 provided by the present invention, the technical effect and above-described embodiment of basic principle and generation
Identical, to briefly describe, the present embodiment part does not refer to place, can refer to corresponding contents in the above embodiments.The defrost control
Device 300 processed includes: parameter acquisition module 310, computing module 320, mode switch module 330.
Wherein, parameter acquisition module 310 is used for after the first preset time that air conditioner 100 enters heating mode, is obtained
At least two groups observed pressure value in second preset time.
It is to be appreciated that parameter acquisition module 310 can be used for executing S201 in a kind of optional embodiment.
Computing module 320 is used to determine base pressure force value according at least two groups observed pressure value.
It is to be appreciated that computing module 320 can be used for executing S202 in a kind of optional embodiment.
Parameter acquisition module 310 is also used into after the third preset time of heating mode, obtains current pressure values.
It is to be appreciated that parameter acquisition module 310 can be used for executing S203 in a kind of optional embodiment.
Computing module 320 is also used to determine pressure change rate based on current pressure values and base pressure force value.
It is to be appreciated that computing module 320 can be used for executing S204 in a kind of optional embodiment.
Mode switch module 330 is used for when pressure change rate meets presetting entrance defrost condition, into defrost mould
Formula.
It is to be appreciated that computing module 320 can be used for executing S205 in a kind of optional embodiment.
In conclusion defrosting control method provided by the invention, device and air conditioner, enter heating mode in air conditioner
After first preset time, at least two groups observed pressure value in the second preset time is obtained, and according at least two groups observed pressure
It is worth and determines base pressure force value, the current pressure values and base pressure force value for being then based on acquisition determines pressure change rate；And when pressure
When power change rate meets presetting entrance defrost condition, into defrost pattern.Due to entering heating mode every time in air conditioner
Afterwards, base pressure force value can be all redefined, to avoid influence of the environmental factors such as dust to base pressure force value.Meanwhile passing through
The pressure change rate of dynamic pressure or static pressure on the inside of outdoor heat exchanger judges the truth of outer machine frosting, not by outdoor environment this
One factor is influenced, more accurate.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of defrosting control method, which is characterized in that the defrosting control method includes:
After the first preset time that air conditioner (100) enter heating mode, at least two groups obtained in the second preset time are real
Measuring pressure value, wherein the observed pressure value is the dynamic pressure value or static pressure on the inside of outdoor heat exchanger (140)；
Base pressure force value is determined according at least two groups observed pressure value；
Into after the third preset time of heating mode, current pressure values are obtained, wherein the current pressure values and the actual measurement
Pressure value is corresponding；
Pressure change rate is determined based on the current pressure values and the base pressure force value；
When the pressure change rate meets presetting entrance defrost condition, into defrost pattern.
2. defrosting control method according to claim 1, which is characterized in that the method also includes: if the actual measurement is pressed
Force value is the dynamic pressure value on the inside of the outdoor heat exchanger (140), then when the pressure change rate is less than or equal to presetting the
When one dynamic pressure change threshold, judge that the pressure change rate meets the presetting entrance defrost condition.
3. defrosting control method according to claim 2, which is characterized in that described after entering the defrost pattern
Method further include:
When the pressure change rate is greater than or equal to the second presetting dynamic pressure change threshold, the defrost pattern is exited.
4. defrosting control method according to claim 1, which is characterized in that the method also includes: if the actual measurement is pressed
Force value is the static pressure on the inside of the outdoor heat exchanger (140), then when the pressure change rate is greater than or equal to presetting the
When one static pressure change threshold, judge that the pressure change rate meets the presetting entrance defrost condition.
5. defrosting control method according to claim 4, which is characterized in that described after entering the defrost pattern
Method further include:
When the pressure change rate is less than or equal to the second presetting static pressure change threshold, the defrost pattern is exited.
6. defrosting control method described in any one of -5 according to claim 1, which is characterized in that the acquisition current pressure
The step of value includes:
The current pressure values are obtained according to presetting period first time；
It is described when the pressure change rate meet it is presetting enter defrost condition when enter defrost pattern the step of include:
If the pressure change rate meets presetting entrance defrost condition, into institute in presetting second time period
State defrost pattern, wherein the second time period is the presupposition multiple in period first time.
7. defrosting control method described in any one of -5 according to claim 1, which is characterized in that it is described according at least
The step of two groups of observed pressure values determine base pressure force value include:
By in at least two groups observed pressure value, the maximum value and minimum value in at least two groups observed pressure value are rejected
The average value of the remaining observed pressure value is determined as the base pressure force value afterwards.
8. defrosting control method described in any one of -5 according to claim 1, which is characterized in that the method also includes:
Obtain current outdoor environment temperature；
It is described when the pressure change rate meet it is presetting enter defrost condition when enter defrost pattern the step of include:
When the pressure change rate meets presetting entrance defrost condition and the current outdoor environment temperature less than presetting
Temperature threshold when, into the defrost pattern.
9. a kind of defrosting control device, which is characterized in that the defrosting control device (300) includes:
Parameter acquisition module (310), for obtaining second after the first preset time that air conditioner (100) enter heating mode
At least two groups observed pressure value in preset time, wherein the observed pressure value is the dynamic pressure on the inside of outdoor heat exchanger (140)
Value or static pressure；
Computing module (320), for determining base pressure force value according at least two groups observed pressure value；
The parameter acquisition module (310) is also used to after the third preset time that the air conditioner (100) enter heating mode,
Obtain current pressure values, wherein the current pressure values are corresponding with the observed pressure value；
The computing module (320) is also used to determine pressure change rate based on the current pressure values and the base pressure force value；
Mode switch module (330), for when the pressure change rate meet it is presetting enter defrost condition when, into defrost
Mode.
10. a kind of air conditioner, which is characterized in that including controller (110), outdoor heat exchanger (140) and pressure sensor
(120), the pressure sensor (120) is electrically connected with the controller (110), and the pressure sensor (120) is set to institute
It states on the inside of outdoor heat exchanger (140)；
The pressure sensor (120) is used to acquire the pressure value on the inside of the outdoor heat exchanger (140) in real time；
The pressure sensor (120) was also used to according to presetting period first time, according in period first time
The pressure value of acquisition determines observed pressure value, and the observed pressure value is transmitted to the controller (110)；
The controller (110) is used for after the first preset time that air conditioner (100) enter heating mode, and it is default to obtain second
At least two groups observed pressure value in time, wherein the observed pressure value be outdoor heat exchanger (140) on the inside of dynamic pressure value or
Static pressure；
The controller (110) is also used to determine base pressure force value according at least two groups observed pressure value；
The controller (110) is also used into after the third preset time of heating mode, obtains current pressure values, wherein institute
It is corresponding with the observed pressure value to state current pressure values；
The controller (110) is also used to determine pressure change rate based on the current pressure values and the base pressure force value；
The controller (110) is also used to when the pressure change rate meets presetting entrance defrost condition, into defrost
Mode.
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| CN113063213A (en) * | 2021-04-06 | 2021-07-02 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
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