CN110470002A - Control method and device, air-conditioning for air-conditioner defrosting - Google Patents
Control method and device, air-conditioning for air-conditioner defrosting Download PDFInfo
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- CN110470002A CN110470002A CN201910712371.5A CN201910712371A CN110470002A CN 110470002 A CN110470002 A CN 110470002A CN 201910712371 A CN201910712371 A CN 201910712371A CN 110470002 A CN110470002 A CN 110470002A
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- heat exchanger
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient temperatures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
This application involves air-conditioner defrosting technical fields, disclose a kind of control method for air-conditioner defrosting.Control method includes: in the case where air-conditioning is defrosted, and control increases the flow aperture of the throttling set of air-conditioning；Outdoor coil temperature, the refrigerant for obtaining outdoor heat exchanger go out liquid temperature and upper body temperature；In the case where outdoor coil temperature, refrigerant go out liquid temperature and upper body temperature meets defrosting exit criteria, control stops increasing the flow aperture of throttling set.The opportunity of defrosting is exited, using multiple temperature parameter comprehensive descision air-conditionings of outdoor heat exchanger so as to effectively improve the control precision for exiting defrosting to control air-conditioning；And the flow aperture by increasing throttling set changes refrigerant temperature and pressure in refrigerant circulation circuit etc., and the refrigerant for finally flowing into outdoor heat exchanger progress defrost is enable to reach preferable defrosting effect.A kind of control device and air-conditioning for air-conditioner defrosting is also disclosed in the application.
Description
Technical field
This application involves air-conditioner defrosting technical fields, for example, be related to a kind of control method and device for air-conditioner defrosting,
Air-conditioning.
Background technique
Currently, the mainstream model of air-conditioning is mostly the heat exchange function for having cooling and warming double mode, here, air-conditioning is cryogenically
Under area or the biggish weather conditions of wind and snow, user is usually to adjust air-conditioning to heating mode, indoor to be promoted using air-conditioning
The temperature of environment；In air conditioner in operation heating operations, the outdoor heat exchanger of outdoor unit is to play to absorb from outdoor environment
The effect of the evaporator of heat is influenced by the temperature and humidity of outdoor environment, and the more ice of condensation is easy on outdoor heat exchanger
Frost, and meeting is so that the heating capacity of air-conditioning can be lower and lower, therefore imitates to guarantee to heat after simultaneously frost knot arrives certain thickness
Fruit avoids frost condensation excessive, it is therefore necessary to defrost to outdoor heat exchanger.
Here, the mode to defrost to outdoor heat exchanger is mainly include the following types: first is that reverse cycle defrosting, air-conditioning carry out
When reverse cycle defrosting, the high temperature refrigerant of compressor discharge first flows through outdoor heat exchanger, to melt frost using refrigerant heat；Second is that
Increase electric heater unit on the refrigerant pipeline of air-conditioning, the refrigerant for flowing into outdoor heat exchanger is heated using electric heater unit, in turn
Melt the frost condensed on outdoor heat exchanger using refrigerant heat；Third is that adjusting the air supply rates such as compressor, electric expansion valve
Operating parameter, to change the temperature and pressure state of refrigerant in refrigerant pipeline, making it also can be played to outdoor heat exchanger defrosting
Effect.
During realizing the embodiment of the present disclosure, at least there are the following problems in the related technology for discovery:
Since the Defrost mode of above-mentioned several pairs of outdoor heat exchangers more or less all can be to the normal heating performance structure of air-conditioning
At influence, therefore air-conditioning will do it judgement before exiting defrosting, and then control whether air-conditioning exits defrosting according to judging result.
In the related technology, it removes generally by judging whether to exit to the mode compared with numerical value between outdoor environment temperature and frost point temperature
Frost.Since the solidifying white situation of outdoor heat exchanger can be influenced by many factors such as outdoor environment and self-operating state simultaneously,
Therefore the above-mentioned judgment mode for whether exiting defrosting mode is excessively rough, is easy to make air-conditioning exit defrosting mode in advance and cause to remove
Frost is not thorough, alternatively, after the completion of defrosting continuous service defrosting mode and influence the normal heating performance of air-conditioning.
Summary of the invention
In order to which some aspects of the embodiment to disclosure have basic understanding, simple summary is shown below.It is described general
Including is not extensive overview, nor to determine key/critical component or describe the protection scope of these embodiments, but is made
For the preamble of following detailed description.
The embodiment of the present disclosure provides a kind of control method and device for air-conditioner defrosting, air-conditioning, to solve related skill
The judgment mode that defrosting mode whether is exited in art is excessively rough, is easy to make air-conditioning exit defrosting mode in advance and cause defrosting not
Thoroughly, alternatively, after the completion of defrosting continuous service defrosting mode and the technical issues of influence air-conditioning normal heating performance.
In some embodiments, the control method for air-conditioner defrosting includes:
In the case where air-conditioning is defrosted, control increases the flow aperture of the throttling set of air-conditioning；
Outdoor coil temperature, the refrigerant for obtaining outdoor heat exchanger go out liquid temperature and upper body temperature；
In the case where outdoor coil temperature, refrigerant go out liquid temperature and upper body temperature meets defrosting exit criteria, control
Stop stops the flow aperture for increasing throttling set.
In some embodiments, the control device for air-conditioner defrosting includes processor and is stored with program instruction
Memory, processor are configured as when executing program instructions, and execute the above-mentioned control method for air-conditioner defrosting.
In some embodiments, the air-conditioning includes:
Refrigerant circulation circuit is connected by outdoor heat exchanger, indoor heat exchanger, throttling set and compressor by refrigerant pipeline
It constitutes；
The above-mentioned control device for air-conditioner defrosting, is electrically connected with throttling set.
The control method and device for air-conditioner defrosting of embodiment of the present disclosure offer, air-conditioning, may be implemented following technology
Effect:
Air-conditioning during Defrost operation, using the outdoor coil temperature of outdoor heat exchanger, refrigerant go out liquid temperature and on
Case temperature these three parametric synthesis in portion's judge that air-conditioning exits the opportunity of defrosting, exit so as to effectively improve to control air-conditioning
The control precision of defrosting avoids air-conditioning from exiting defrosting mode in advance and defrosting is caused to be not thorough, alternatively, continuing after the completion of defrosting
It runs defrosting mode and influences the normal heating performance of air-conditioning；And the flow aperture by increasing throttling set changes refrigerant circulation
Refrigerant temperature and pressure in circuit etc. enable the refrigerant for finally flowing into outdoor heat exchanger progress defrost to reach preferable defrost
Effect, to reduce frost condensation to the adverse effect of air-conditioning itself heating performance.
Above general description and it is discussed below be only it is exemplary and explanatory, be not used in limitation the application.
Detailed description of the invention
One or more embodiments are illustrated by corresponding attached drawing, these exemplary illustrations and attached drawing
The restriction to embodiment is not constituted, the element with same reference numbers label is shown as similar element in attached drawing, and attached drawing is not
Composition limitation, and wherein:
Fig. 1 is the flow diagram for the control method for air-conditioner defrosting that the embodiment of the present disclosure provides；
Fig. 2 is the flow diagram for the control method for air-conditioner defrosting that the embodiment of the present disclosure provides；
Fig. 3 is the flow diagram for the control method for air-conditioner defrosting that the embodiment of the present disclosure provides；
Fig. 4 is the structural schematic diagram for the control device for air-conditioner defrosting that the embodiment of the present disclosure provides.
Specific embodiment
The characteristics of in order to more fully hereinafter understand the embodiment of the present disclosure and technology contents, with reference to the accompanying drawing to this public affairs
The realization for opening embodiment is described in detail, appended attached drawing purposes of discussion only for reference, is not used to limit the embodiment of the present disclosure.
In technical description below, for convenience of explanation for the sake of, disclosed embodiment is fully understood with providing by multiple details.
However, one or more embodiments still can be implemented in the case where without these details.It in other cases, is simplification
Attached drawing, well known construction and device can simplify displaying.
Fig. 1 is the flow diagram for the control method for air-conditioner defrosting that the embodiment of the present disclosure provides.
A kind of control method for air-conditioner defrosting is provided in the embodiment of the present disclosure, as shown in Figure 1, including following step
It is rapid:
S101: in the case where air-conditioning is defrosted, control increases the flow aperture of the throttling set of air-conditioning.In reality
It applies in example, when frosting problem occurs in the outdoor heat exchanger of air-conditioner outdoor unit, outdoor environment is mostly in temperature is lower, humidity is larger
Bad working environments, at this time user be usually by air-conditioning be set as heating mode operation, with using air-conditioning to indoor environment system
Heat heating.Therefore the control method for air-conditioner defrosting that the embodiment of the present disclosure provides is opened when air-conditioning is run with heating mode
Control flow.
Optionally, judge by way of compared with numerical value between outdoor environment temperature and frost point temperature air-conditioning whether need into
Row defrosting.When outdoor environment temperature is lower than frost point temperature, then it is assumed that air-conditioning defrosts；When outdoor environment temperature is higher than
When frost point temperature, then it is assumed that air-conditioning is without defrosting.
Flow aperture by increasing throttling set changes refrigerant temperature and pressure etc. in refrigerant circulation circuit, makes final
The refrigerant for flowing into outdoor heat exchanger progress defrost can reach preferable defrosting effect, be made with reducing frost condensation to air-conditioning itself
The adverse effect of hot property.
S102: the outdoor coil temperature of outdoor heat exchanger is obtained, refrigerant goes out liquid temperature and upper body temperature.
Optionally, the coil pipe position of the outdoor heat exchanger of air-conditioner outdoor unit is provided with one first temperature sensor, this
One temperature sensor can be used for detecting the real time temperature of coil pipe position.Therefore, acquired outdoor coil pipe used temperature in step s 102
Degree can be the real time temperature by coil pipe position detected by the first temperature sensor.
The temperature change of the coil pipe position of outdoor heat exchanger can intuitively reflect in external outdoor environment temperature and interior
The temperature variations of the refrigerant pipeline of outdoor heat exchanger, are in addition typically also outdoor heat exchange under the refrigerant temperature joint effect in portion
Device is easy to appear the pipeline position of frosting problem.Therefore the outdoor coil temperature got, which can be used as, measures air-conditioning inside and outside pair
The reference factor that the frosting that outdoor heat exchanger generates jointly influences.
Optionally, the outdoor heat exchanger of air-conditioner outdoor unit is provided with a second temperature sensor, second temperature sensing
Device can be used for detecting the real time temperature of the refrigerant on the refrigerant outlet tube road for flowing through outdoor heat exchanger.Therefore, institute in step s 102
The refrigerant of the outdoor heat exchanger of acquisition, which goes out liquid temperature, can be real-time temperature by refrigerant detected by second temperature sensor
Degree.Here, when refrigerant outlet tube road is run for air-conditioning with heating mode refrigerant outflow outdoor heat exchanger via pipeline.
The temperature for flowing out the refrigerant of outdoor heat exchanger is to can reflect out the heat exchange effect of outdoor heat exchanger and outdoor environment
Rate, and heat exchanger effectiveness then will receive the influence of the frosting degree of outdoor heat exchanger；Here, air-conditioning frosting degree is lower, ice
In the case that frost thickness are relatively thin, influence of the frost to heat exchange is smaller, the heat that the refrigerant after flowing through outdoor heat exchanger is absorbed
It is more；And in the case where air-conditioning frosting degree is higher, frost thickness is thicker, frost is affected to heat exchange, flows through room
The heat that refrigerant after external heat exchanger is absorbed is less.Therefore the refrigerant that acquires, which goes out liquid temperature and can be used as, measures air-conditioning and changes
The reference factor of the frosting degree of hot device.
Optionally, the outdoor heat exchanger of air-conditioner outdoor unit is provided with a third temperature sensor, the third temperature sensing
Device can be used for detecting the upper body temperature of outdoor heat exchanger.Therefore, acquired upper body temperature can in step s 102
To be the real time temperature detected by the third temperature sensor.
The refrigerant inlet pipe of outdoor heat exchanger is set to lower part, and refrigerant goes out liquid and is set to top, therefore in heating mode
Lower refrigerant flows into outdoor heat exchanger from below, and flows out outdoor heat exchanger from top.Therefore upper casing temperature is by having flowed through room
Most of pipeline of external heat exchanger is simultaneously influenced with the temperature of the refrigerant after outdoor environment heat exchange, is able to reflect out in difference
The heat exchanger effectiveness of refrigerant under frosting situation.Under the situation of the non-frosting of air-conditioning, refrigerant absorb heat from outdoor environment it is more, therefore
The temperature for the upper body being affected by it is also higher；And in air-conditioning there are in the case where frosting, refrigerant absorbs heat from outdoor environment
It is less, therefore upper casing temperature is relatively low.In this way, room of the upper casing temperature of outdoor heat exchanger compared to outdoor heat exchanger lower part
Outer coil temperature more can accurately reflect the frosting degree of outdoor heat exchanger.
S103: the case where outdoor coil temperature, refrigerant go out liquid temperature and upper body temperature meets defrosting exit criteria
Under, control stops increasing the flow aperture of throttling set.
In the case where outdoor coil temperature, refrigerant go out liquid temperature and upper body temperature meets defrosting exit criteria, control
Stop stops the operating status for adjusting the throttling set of air-conditioning, and the flow aperture for mitigating increase throttling set normally heats air-conditioning
It is influenced caused by performance.
Optionally, defrost exit criteria are as follows:
T1≥T01, t1≥t01, T2≥T02, t2≥t02, T3≥T03, and t3≥t03
Wherein, T1For the outdoor coil temperature of outdoor heat exchanger, T01For the first preset temperature, t1For T1≥T01It is lasting when
It is long, t01For the first preset duration, T2Go out liquid temperature, T for the refrigerant of outdoor heat exchanger02For the second preset temperature, t2For T2≥T02
Duration, t02For the second preset duration, T3For the upper body temperature of outdoor heat exchanger, T03For third preset temperature, t3
For T3≥T03Duration, t03For third preset duration.
Optionally, the first preset temperature is the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process prestored
The correction temperature of outdoor coil temperature after the completion.After the completion of outdoor heat exchanger defrosting, outdoor coil temperature can be due to white water
There is certain fluctuation in the reasons such as evaporation.Therefore the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process is completed
Outdoor coil temperature afterwards is corrected, and improves the accuracy of defrosting exit criteria.
First preset temperature can be calculated by the following formula to obtain:
T01=α * T001
Wherein, α is the first proportionality coefficient, T001For the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process
Outdoor coil temperature after the completion.The value range of α is [1.1,1.3], for example, 1.1,1.15,1.2,1.25,1.3.
Optionally, the second preset temperature is the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process prestored
Refrigerant after the completion goes out the correction temperature of liquid temperature.After the completion of outdoor heat exchanger defrosting, due to condensing on outdoor heat exchanger
The reasons such as white water evaporation will affect the heat exchanger effectiveness of outdoor heat exchanger and outdoor environment, and then the refrigerant detected is caused to go out liquid
Refrigerant after temperature and practical defrosting when outdoor heat exchanger stable operation goes out between liquid temperature deviation occur.Therefore in sky
Refrigerant after the completion of adjusting the outdoor heat exchanger detected in defrosting test process to defrost goes out liquid temperature and is corrected, and improves defrosting and moves back
The accuracy of condition out.
Second preset temperature can be calculated by the following formula to obtain:
T02=β * T002
Wherein, β is the second proportionality coefficient, T002For the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process
Refrigerant after the completion goes out liquid temperature.The value range of β is [1.1,1.4], for example, 1.1,1.2,1.3,1.4.
Optionally, third preset temperature is the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process prestored
The correction temperature of upper body temperature after the completion.After the completion of outdoor heat exchanger defrosting, upper part case temperature can be due to white water
There is certain fluctuation in the reasons such as evaporation.Therefore the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process is completed
Upper body temperature afterwards is corrected, and improves the accuracy of defrosting exit criteria.
Third preset temperature can be calculated by the following formula to obtain:
T03=δ * T003
Wherein, δ is third proportionality coefficient, T003For the outdoor heat exchanger defrosting detected in air-conditioner defrosting test process
Upper body temperature after the completion.The value range of δ is [1.1,1.3], for example, 1.1,1.15,1.2,1.25,1.3.
Optionally, the value range of the first preset duration is [2s, 5s] (s: second), for example, 2s, 3s, 4s, 5s；Second is pre-
If the value range of duration is [2s, 5s], for example, 2s, 3s, 4s, 5s；The value range of third preset duration is [2s, 5s], example
Such as, 2s, 3s, 4s, 5s.
In the defrosting exit criteria, the outdoor coil temperature of outdoor heat exchanger is greater than the first preset temperature and duration
Greater than the first preset duration, it can intuitively reflect that the defrost of outdoor heat exchanger outer surface is completed；The refrigerant of outdoor heat exchanger goes out liquid
Temperature is greater than the second preset temperature and duration is greater than the second preset duration, can reflect out the heating performance of outdoor heat exchanger
Restore at least frost or frostless situation；The upper body temperature of outdoor heat exchanger is greater than third preset temperature and duration and is greater than the
Three preset durations can more accurately reflect outdoor heat exchanger outer surface defrost completion.Therefore, can stop increasing throttling dress
The flow aperture set exits the Defrost operation mode of air-conditioning.
In the present embodiment, air-conditioning is gone out during Defrost operation using the outdoor coil temperature of outdoor heat exchanger, refrigerant
Liquid temperature and upper body temperature these three parametric synthesis judge the opportunity that air-conditioning stops heating, exits defrosting, so as to have
Effect improves the control precision that defrosting is exited to control air-conditioning, avoids air-conditioning from exiting defrosting mode in advance and defrosting is caused to be not thorough,
Alternatively, after the completion of defrosting continuous service defrosting mode and influence the normal heating performance of air-conditioning.In addition, by increasing throttling dress
The flow aperture set changes refrigerant temperature and pressure in refrigerant circulation circuit etc., makes to finally flow into outdoor heat exchanger progress defrost
Refrigerant can reach preferable defrosting effect, to reduce frost condensation to the adverse effect of air-conditioning itself heating performance.
Fig. 2 is the flow diagram for the control method for air-conditioner defrosting that the embodiment of the present disclosure provides.
A kind of control method for air-conditioner defrosting is provided in the embodiment of the present disclosure, as shown in Fig. 2, including following step
It is rapid:
S201: judge whether air-conditioning defrosts.
S202: in the case where air-conditioning is defrosted, the outdoor heat exchange recorded after this booting operation of air-conditioning is obtained
The upper body temperature maximum of device and the first temperature gap of upper body temperature.
The upper body temperature maximum of outdoor heat exchanger that is recorded after this booting operation of air-conditioning and outdoor heat exchanger
The second temperature difference of upper body temperature is able to reflect out the heat absorption effect of the refrigerant under different frosting situations in outdoor heat exchanger
Rate, thus and can be as the parameter for judging air-conditioning frosting degree.
S203: judge whether the first temperature gap is greater than the first fiducial temperature threshold value.
First temperature gap is greater than the first fiducial temperature threshold value, shows shadow of the air-conditioning by outdoor heat exchanger of air conditioner frosting
It rings, heating capacity decline.Therefore control increases the flow aperture of throttling set, reduces the restriction effect of throttling set, so that stream
Refrigerant through throttling set is able to maintain higher temperature, improves the frosting situation of outdoor heat exchanger.
S204: it in the case where the first temperature gap is greater than the first fiducial temperature threshold value, is determined according to the first temperature gap
First object flow aperture.
Wherein, first object flow aperture is greater than the heating flow aperture in heating operations.
First temperature gap is larger, then illustrates that air-conditioning heating ability is poor, and the frosting degree of outdoor heat exchanger of air conditioner is more
Seriously, setting first object flow aperture is larger at this time, accelerates defrost；First temperature gap is smaller, then illustrate heating capacity compared with
Good, the frosting lesser extent of outdoor heat exchanger of air conditioner can suitably reduce first object flow aperture, reduce and increase throttling set
Influence of the flow aperture to the normal heating performance of air-conditioning.Therefore, the of throttling set can be determined according to the first temperature gap
One target flow aperture.
Optionally, according to the first temperature gap, corresponding first flow aperture is obtained from the first incidence relation and by
One flow aperture is as first object flow aperture.
Here, include that one or more first temperature gaps are corresponding with first flow aperture in the first incidence relation to close
System.For example, showing corresponding relationship (wherein, the Δ T of a kind of optional first temperature gap and first flow aperture in table 11=
T3max-T03, Δ T1For the first temperature gap, T3maxUpper body for the outdoor heat exchanger recorded after this booting operation of air-conditioning
Temperature maximum):
1: the first incidence relation of table
| First temperature gap (unit: DEG C) | First flow aperture |
| a11<ΔT1≤a12 | B11 |
| a12<ΔT1≤a13 | B12 |
| a13<ΔT1 | B13 |
In first incidence relation, first flow aperture and the first temperature gap are to be positively correlated.I.e. the first temperature gap is bigger,
Then first flow aperture is bigger；And the first temperature gap is smaller, then first flow aperture is with regard to smaller.
S205: the flow aperture of throttling set is adjusted to first object flow aperture.
After obtaining first object flow aperture, the flow aperture of throttling set is adjusted to first object flow aperture,
Improve the frosting situation of outdoor heat exchanger.
S206: the outdoor coil temperature of outdoor heat exchanger is obtained, refrigerant goes out liquid temperature and upper body temperature.
S207: judge that outdoor coil temperature, refrigerant go out liquid temperature and whether upper body temperature meets defrosting exit criteria.
S208: the case where outdoor coil temperature, refrigerant go out liquid temperature and upper body temperature meets defrosting exit criteria
Under, control stops increasing the flow aperture of throttling set.
In the present embodiment, improves defrosting effect by adjusting the operating status of the throttling set of air-conditioning to will affect air-conditioning normal
Heating performance.Therefore go out liquid temperature in outdoor coil temperature, refrigerant and upper body temperature meets the feelings of defrosting exit criteria
Under condition, control stops the operating status of the throttling set of adjustment air-conditioning and restores to the flow aperture of normal heating mode, restores
The normal heating performance of air-conditioning.
Fig. 3 is the flow diagram for the control method for air-conditioner defrosting that the embodiment of the present disclosure provides.
A kind of control method for air-conditioner defrosting is provided in the embodiment of the present disclosure, as shown in figure 3, including following step
It is rapid:
S301: judge whether air-conditioning defrosts.
S302: in the case where air-conditioning is defrosted, the second of outdoor coil temperature and outdoor environment temperature is obtained
Temperature gap.
Optionally, air-conditioner outdoor unit is provided with one the 4th temperature sensor, and the 4th temperature sensor can be used for sensing chamber
External environment temperature.Therefore, outdoor environment temperature acquired in step S202 can be through the 4th temperature sensor institute
The real time temperature detected.
S303: judge second temperature difference whether less than the second fiducial temperature threshold value.
Optionally, the value range of the second fiducial temperature threshold value is [15 DEG C, 25 DEG C] (DEG C: degree Celsius), for example, 15 DEG C,
20℃、25℃。
The second temperature difference of outdoor coil temperature and outdoor environment temperature shows air-conditioning less than the second fiducial temperature threshold value
It is influenced by outdoor heat exchanger of air conditioner frosting, heating capacity decline.Therefore control increases the flow aperture of throttling set, changes
Refrigerant temperature and pressure in refrigerant circulation circuit etc., enable to finally flow into outdoor heat exchanger carry out defrost refrigerant reach compared with
Good defrosting effect.
S304: it in the case where second temperature difference is less than the second fiducial temperature threshold value, is determined according to second temperature difference
Second target flow aperture.
Wherein, the second target flow aperture is greater than the heating flow aperture in heating operations.
Second temperature difference is larger, then illustrates that air-conditioning heating ability is poor, and the frosting degree of outdoor heat exchanger of air conditioner is more
Seriously, it is larger that the second target flow aperture is set at this time, accelerates defrost；Second temperature difference is smaller, then illustrate heating capacity compared with
Good, the frosting lesser extent of outdoor heat exchanger of air conditioner can suitably reduce the second target flow aperture, reduce and increase throttling set
Influence of the flow aperture to the normal heating performance of air-conditioning.Therefore, the of throttling set can be determined according to second temperature difference
Two target flow apertures.
Optionally, according to second temperature difference, corresponding second flow aperture is obtained from the second incidence relation and by
Two flow apertures are as the second target flow aperture.
It include the corresponding relationship of one or more second temperature differences and second flow aperture in second incidence relation.Example
Such as, corresponding relationship (wherein, the Δ T of a kind of optional second temperature difference and second flow aperture is shown in table 22=T1-T4,
ΔT1For second temperature difference, T4For outdoor environment temperature):
2: the second incidence relation of table
| Second temperature difference (unit: DEG C) | Second flow aperture |
| a21<ΔT2≤a22 | B21 |
| a22<ΔT2≤a23 | B22 |
| a23<ΔT2 | B23 |
In second incidence relation, the second target flow aperture and second temperature difference are negative correlation.That is second temperature difference
Bigger, then the second target flow aperture is with regard to smaller；And second temperature difference is smaller, then the second target flow aperture is bigger.
S305: the flow aperture of throttling set is adjusted to the second target flow aperture.
After obtaining the second target flow aperture, the flow aperture of throttling set is adjusted to the second target flow aperture,
Improve the frosting situation of outdoor heat exchanger.
S306: the outdoor coil temperature of outdoor heat exchanger is obtained, refrigerant goes out liquid temperature and upper body temperature.
S307: judge that outdoor coil temperature, refrigerant go out liquid temperature and whether upper body temperature meets defrosting exit criteria.
S308: the case where outdoor coil temperature, refrigerant go out liquid temperature and upper body temperature meets defrosting exit criteria
Under, control stops increasing the flow aperture of throttling set.
In the present embodiment, improves defrosting effect by adjusting the operating status of the throttling set of air-conditioning to will affect air-conditioning normal
Heating performance.Therefore go out liquid temperature in outdoor coil temperature, refrigerant and upper body temperature meets the feelings of defrosting exit criteria
Under condition, control stops the operating status of the throttling set of adjustment air-conditioning and restores to the flow aperture of normal heating mode, restores
The normal heating performance of air-conditioning.
In the above-described embodiments, the influence size due to the height of the frosting degree of outdoor heat exchanger to air-conditioning heating performance
Difference, and then it is different to influence amplitude to the temperature change of the first temperature gap with second temperature difference, therefore the application is respective
It is provided with an individual incidence relation, air-conditioning can select according to actual needs one of incidence relation to determine corresponding frequency reducing
Value.
Optionally, the incidence relation specifically selected can also be determined according to the heating needs of active user, for example, current
When the heating needs of user are lower, then the second incidence relation is selected, at this time mainly in view of outdoor heat exchanger frosting is for room
The influence of outer coil temperature；And when the heating needs of active user are higher, then the first incidence relation is selected, is mainly examined at this time
Consider influence of the outdoor heat exchanger frosting for outdoor heat exchanger upper body temperature.
The correlation ratio of first incidence relation is greater than the correlation ratio in the second incidence relation.The temperature difference of i.e. same numerical value
In the case of value, corresponding first frequency reducing value is greater than corresponding second frequency reducing value in the second incidence relation in the first incidence relation.
Here, the heating needs of active user can heat temperature by the target set to air-conditioning and be determined.For example,
Air-conditioning is preset with a heating temperature threshold, when the target of user's actual set heating temperature is less than the heating temperature threshold, then
Illustrate that the heating needs of user at this time are lower；And when the target of user's actual set heating temperature is greater than or equal to the heating temperature
When threshold value, then illustrate the heating needs height of user at this time.
In the embodiment of the present disclosure, air-conditioning can not only be timely triggered according to the practical frosting situation of air-conditioning for outdoor heat exchange
The defrosting of device operates, while the system of user can also be taken into account when executing and operating to the defrosting that throttling set flow aperture adjusts
Heat demand, to fully ensure that air-conditioning during defrosting to the control requirement of users'comfort.
Fig. 4 is the structural schematic diagram for the control device for air-conditioner defrosting that the embodiment of the present disclosure provides.
The embodiment of the present disclosure provides a kind of control device for air-conditioner defrosting, and structure is as shown in Figure 4, comprising:
Processor (processor) 40 and memory (memory) 41 can also include communication interface
(Communication Interface) 42 and bus 43.Wherein, processor 40, communication interface 42, memory 41 can pass through
Bus 43 completes mutual communication.Communication interface 42 can be used for information transmission.Processor 40 can call in memory 41
Logical order, to execute the control method for air-conditioner defrosting of above-described embodiment.
In addition, the logical order in above-mentioned memory 41 can be realized and as only by way of SFU software functional unit
Vertical product when selling or using, can store in a computer readable storage medium.
Memory 41 is used as a kind of computer readable storage medium, can be used for storing software program, journey can be performed in computer
Sequence, such as the corresponding program instruction/module of the method in the embodiment of the present disclosure.Processor 40 is stored in memory 41 by operation
Program instruction/module be used for air-conditioning in realization above method embodiment thereby executing functional application and data processing
The control method of defrosting.
Memory 41 may include storing program area and storage data area, wherein storing program area can storage program area, extremely
Application program needed for a few function；Storage data area, which can be stored, uses created data etc. according to terminal device.This
Outside, memory 41 may include high-speed random access memory, can also include nonvolatile memory.
The embodiment of the present disclosure provides a kind of air-conditioning, comprising:
Refrigerant circulation circuit is connected by outdoor heat exchanger, indoor heat exchanger, throttling set and compressor by refrigerant pipeline
It constitutes；
The above-mentioned control device for air-conditioner defrosting, is electrically connected with throttling set.
The embodiment of the present disclosure provide air-conditioning, using the outdoor coil temperature of outdoor heat exchanger, refrigerant go out liquid temperature and on
Case temperature these three parametric synthesis in portion's judge that air-conditioning exits the opportunity of defrosting, exit so as to effectively improve to control air-conditioning
The control precision of defrosting；Flow aperture by increasing throttling set changes refrigerant temperature and pressure in refrigerant circulation circuit
Deng enabling to finally flow into outdoor heat exchanger and carry out the refrigerant of defrost and reach preferable defrosting effect, to reduce frost condensation pair
The adverse effect of air-conditioning itself heating performance.
The embodiment of the present disclosure provides a kind of computer readable storage medium, is stored with computer executable instructions, described
Computer executable instructions are arranged to carry out the above-mentioned control method for air-conditioner defrosting.
The embodiment of the present disclosure provides a kind of computer program product, and the computer program product includes being stored in calculating
Computer program on machine readable storage medium storing program for executing, the computer program include program instruction, when described program instruction is calculated
When machine executes, the computer is made to execute the above-mentioned control method for air-conditioner defrosting.
Above-mentioned computer readable storage medium can be transitory computer readable storage medium, be also possible to non-transient meter
Calculation machine readable storage medium storing program for executing.
The technical solution of the embodiment of the present disclosure can be embodied in the form of software products, which deposits
Storage in one storage medium, including one or more instruction is used so that computer equipment (can be personal computer,
Server or the network equipment etc.) execute embodiment of the present disclosure the method all or part of the steps.And storage above-mentioned is situated between
Matter can be non-transient storage media, comprising: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses a variety of Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter is also possible to transitory memory medium.
Above description and attached drawing sufficiently illustrate embodiment of the disclosure, to enable those skilled in the art to practice
They.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment only represents
Possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and the sequence operated can change.
The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The embodiment of the present disclosure
Range includes the entire scope of claims and all obtainable equivalents of claims.When for the application
When middle, although term " first ", " second " etc. may be used in this application to describe each element, these elements should not be by
To the limitation of these terms.These terms are only used to differentiate an element with another element.For example, not changing description
Meaning in the case where, first element can be called second element, and same, and second element can be called first element,
As long as " first element " that is occurred unanimously renames and " second element " occurred unanimously renames.First
Element and second element are all elements, but can not be identical element.Moreover, word used herein is only used for describing
Embodiment and it is not used in limitation claim.As used in the description in embodiment and claim, unless context
It clearly illustrates, otherwise "one" (a) of singular, "one" (an) and " described " (the) is intended to equally include plural shape
Formula.Similarly, term "and/or" refers to and associated lists comprising one or more as used in this specification
Any and all possible combination.In addition, when in the application, term " includes " (comprise) and its modification " packet
Include " (comprises) and/or feature, entirety, step, operation, element and/or group including the statement such as (comprising) fingers
The presence of part, but it is not excluded for one or more other features, entirety, step, operation, element, component and/or these point
The presence or addition of group.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method or equipment for including the element.Herein, each embodiment emphasis
What is illustrated can be the difference from other embodiments, and the same or similar parts in each embodiment can refer to each other.It is right
For the method disclosed in embodiment, product etc., if it is corresponding with method part disclosed in embodiment, related place
It may refer to the description of method part.
It will be appreciated by those of skill in the art that unit described in conjunction with the examples disclosed in the embodiments of the present disclosure and
Algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually with hard
Part or software mode execute, and can depend on the specific application and design constraint of technical solution.The technical staff
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The range of the embodiment of the present disclosure.The technical staff can be understood that, for convenience and simplicity of description, foregoing description
The specific work process of system, device and unit, can refer to corresponding processes in the foregoing method embodiment, no longer superfluous herein
It states.
In embodiments disclosed herein, disclosed method, product (including but not limited to device, equipment etc.) can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
Divide, can be only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or
Component can be combined or can be integrated into another system, or some features can be ignored or not executed.In addition, shown
Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.The unit as illustrated by the separation member can be or
Person, which may not be, to be physically separated, and component shown as a unit may or may not be physical unit
With in one place, or may be distributed over multiple network units.Portion therein can be selected according to the actual needs
Point or whole unit realize the present embodiment.In addition, each functional unit in the embodiments of the present disclosure can integrate at one
In processing unit, it is also possible to each unit and physically exists alone, a list can also be integrated in two or more units
In member.
The flow chart and block diagram in the drawings show system, the method and computer program products according to the embodiment of the present disclosure
Architecture, function and operation in the cards.In this regard, each box in flowchart or block diagram can represent one
A part of module, section or code, a part of the module, section or code include it is one or more for realizing
The executable instruction of defined logic function.In some implementations as replacements, function marked in the box can also be with
Occur different from the sequence marked in attached drawing.For example, two continuous boxes can actually be basically executed in parallel, they
Sometimes it can also execute in the opposite order, this can be depended on the functions involved.Flow chart and block diagram institute in the accompanying drawings
In corresponding description, operation corresponding to different boxes or step can also be to be different from sequence hair disclosed in description
Raw, there is no specific sequences between sometimes different operations or step.For example, two continuous operations or step actually may be used
To be basically executed in parallel, they can also be executed in the opposite order sometimes, this can be depended on the functions involved.Block diagram
And/or the combination of each box in flow chart and the box in block diagram and or flow chart, it can the function as defined in executing
Can or the dedicated hardware based system of movement realize, or can come using a combination of dedicated hardware and computer instructions real
It is existing.
Claims (10)
1. a kind of control method for air-conditioner defrosting characterized by comprising
In the case where air-conditioning is defrosted, control increases the flow aperture of the throttling set of the air-conditioning；
Obtain the outdoor coil temperature of the outdoor heat exchanger, refrigerant goes out liquid temperature and upper body temperature；
Go out liquid temperature in the outdoor coil temperature, the refrigerant and the upper body temperature meets the feelings of defrosting exit criteria
Under condition, control stops increasing the flow aperture of the throttling set.
2. control method according to claim 1, which is characterized in that the defrosting exit criteria are as follows:
T1≥T01, t1≥t01, T2≥T02, t2≥t02, T3≥T03, and t3≥t03
Wherein, T1For the outdoor coil temperature of outdoor heat exchanger, T01For the first preset temperature, t1For T1≥T01Duration,
t01For the first preset duration, T2Go out liquid temperature, T for the refrigerant of outdoor heat exchanger02For the second preset temperature, t2For T2≥T02Hold
Continuous duration, t02For the second preset duration, T3For the upper body temperature of outdoor heat exchanger, T03For third preset temperature, t3For T3
≥T03Duration, t03For third preset duration.
3. control method according to claim 1 or 2, which is characterized in that the flow that control increases the throttling set is opened
Degree, comprising:
The upper body temperature maximum and the upper case of the outdoor heat exchanger recorded after this booting operation of the air-conditioning
In the case that first temperature gap of temperature is greater than the first fiducial temperature threshold value, the flow that control increases the throttling set is opened
Degree.
4. control method according to claim 3, which is characterized in that control increases the flow aperture of the throttling set,
Include:
First object flow aperture is determined according to first temperature gap；Wherein, the first object flow aperture is greater than system
Heating flow aperture in thermal process；
The flow aperture of the throttling set is adjusted to the first object flow aperture.
5. control method according to claim 4, which is characterized in that determine described first according to first temperature gap
Target flow aperture, comprising:
According to first temperature gap, corresponding first flow aperture is obtained from the first incidence relation；
Using the first flow aperture as the first object flow aperture.
6. control method according to claim 1 or 2, which is characterized in that the flow that control increases the throttling set is opened
Degree, comprising:
The case where the second temperature difference of the outdoor coil temperature and outdoor environment temperature is less than the second fiducial temperature threshold value
Under, control increases the flow aperture of the throttling set.
7. control method according to claim 6, which is characterized in that control increases the flow aperture of the throttling set,
Include:
The second target flow aperture is determined according to the second temperature difference；Wherein, the second target flow aperture is greater than system
Heating flow aperture in thermal process；
The flow aperture of the throttling set is adjusted to the second target flow aperture.
8. control method according to claim 7, which is characterized in that determine described second according to the second temperature difference
Target flow aperture, comprising:
According to the second temperature difference, corresponding target flow aperture is obtained from the second incidence relation；
Using the second flow aperture as the second target flow aperture.
9. a kind of control device for air-conditioner defrosting, including processor and the memory for being stored with program instruction, feature exists
In the processor is configured to executing as claimed in any one of claims 1 to 8 be used for when executing described program instruction
The control method of air-conditioner defrosting.
10. a kind of air-conditioning characterized by comprising
Refrigerant circulation circuit connects structure by refrigerant pipeline by outdoor heat exchanger, indoor heat exchanger, throttling set and compressor
At；
The control device as claimed in claim 9 for being used for air-conditioner defrosting, is electrically connected with the throttling set.
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| CN201910712371.5A CN110470002B (en) | 2019-08-02 | 2019-08-02 | Control method and device for defrosting of air conditioner and air conditioner |
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