CN106895618A - The self-cleaning control method of air-conditioning and its indoor set heat exchanger - Google Patents
The self-cleaning control method of air-conditioning and its indoor set heat exchanger Download PDFInfo
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- CN106895618A CN106895618A CN201710086837.6A CN201710086837A CN106895618A CN 106895618 A CN106895618 A CN 106895618A CN 201710086837 A CN201710086837 A CN 201710086837A CN 106895618 A CN106895618 A CN 106895618A
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- air
- heat exchanger
- conditioning
- temperature
- surface temperature
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Classifications
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- 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
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
-
- 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
- F25B2347/021—Alternate defrosting
Abstract
The invention provides a kind of air-conditioning and its self-cleaning control method of indoor set heat exchanger.Wherein method includes：Control air conditioner refrigerating, to cause the reduction of heat exchanger surface temperature and frosting.Within the time period of air conditioner refrigerating, the surface temperature of indoor set heat exchanger is persistently detected.The temperature of the heat exchanger obtained according to detection, adjusts the refrigeration duration of indoor set.After refrigeration is terminated, then control air-conditioning heating so that heat exchanger surface temperature is raised, frost melts Cheng Shui is cleaned with heat exchanging device.Within the time period of air-conditioning heating, the surface temperature of indoor set heat exchanger is persistently detected.The temperature of the heat exchanger obtained according to detection, adjust air-conditioning heats the duration.Air-conditioning of the invention freezes and heats according to the temperature adjustment on indoor set heat exchanger surface the time so that the frosting degree appropriateness of heat exchanger surface, to reach optimal self-cleaning effect within the most short time.
Description
Technical field
The present invention relates to field of air conditioning, the self-cleaning control method of more particularly to a kind of air-conditioning and its indoor set heat exchanger.
Background technology
After air-conditioning long-time use, evaporator can adsorb a large amount of dusts, it is necessary to cleaning in time.And evaporator is generally positioned at
Portion in indoor unit enclosure of air conditioner body, so if being wasted time and energy, it is necessary to first dismantle housing if artificial cleaning.
Existing part air-conditioning comes with self-cleaning function to solve the above problems.The self-cleaning of air-conditioning refers to first to control sky
Transfer in into refrigerating state, the reduction of evaporator surface temperature and frosting, then, then convert four-way valve change refrigerant flow direction, control is empty
Transfer in into heating state.The frost for condensing in evaporator surface starts to be melted into water, and takes away dust of the absorption in evaporator surface,
Realize the purpose of evaporator self-cleaning.
But, existing air-conditioning self-cleaning process uses fixed run time, i.e., fixed heat pamp and defrost time.
This air-conditioning frosting degree in the low environment of relative humidity is few, self-cleaning DeGrain.And in relative humidity environment higher
Middle frosting velocity is fast, frosting degree is excessive, it is necessary to the more time carries out defrost, loses time and the energy.Therefore existing air-conditioning is certainly
Cleaning control method cannot adapt to different environmental working conditions.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the air-conditioning of problem and its self-cleaning control method of indoor set heat exchanger.
The present invention one is further objective is that in order to clean heat exchanger for air-conditioner indoor machine.
The present invention another further objective is that save energy.
The present invention another further objective is that improve cleaning performance.
According to an aspect of the present invention, the invention provides a kind of self-cleaning controlling party of heat exchanger for air-conditioner indoor machine
Method, including：Control air conditioner refrigerating, to cause the reduction of heat exchanger surface temperature and frosting；Within the time period of air conditioner refrigerating, continue
Detect the surface temperature of heat exchanger；The surface temperature of the heat exchanger obtained according to detection, adjusts the refrigeration duration of air-conditioning；
After air-conditioning terminates refrigeration, then control air-conditioning heating so that heat exchanger surface temperature is raised, frost melts Cheng Shui, with heat exchanging device
Surface is cleaned；Within the time period of air-conditioning heating, the surface temperature of heat exchanger is persistently detected；And obtained according to detection
The surface temperature of heat exchanger, adjust indoor set heats the duration.
Alternatively, the step of surface temperature of the heat exchanger for being obtained according to detection, refrigeration duration of regulation air-conditioning, wraps
Include：Judge the surface temperature of heat exchanger whether as little as the first preset temperature；If so, control air-conditioning continues first Preset Time that freezes
After terminate refrigeration.
Alternatively, the first preset temperature is determined according to the air intake dry-bulb temperature of heat exchanger.
Alternatively, the surface temperature of the heat exchanger for being obtained according to detection, bag the step of heating the duration of regulation air-conditioning
Include：Judge whether the surface temperature of heat exchanger rises to the second preset temperature；If so, control air-conditioning continues to heat the second Preset Time
After terminate to heat；Wherein the second preset temperature and the second Preset Time are determined according to heat exchanger surface temperature ramp-up rate.
Alternatively, control air-conditioning to enter again after air-conditioning terminates refrigeration, after the 3rd Preset Time of wait and heat state.
Alternatively, refrigeration is stopped after air-conditioner continuous refrigeration reaches the 4th Preset Time；Heated in air-conditioner continuous and reach
Stop heating after five Preset Times.
According to another aspect of the present invention, present invention also offers a kind of air-conditioning, including：Heat exchanger, is arranged at air-conditioning
Inside indoor set, its internal cooling matchmaker is flowed to freeze or heat；Main control module, is configured to control air-conditioning and enters refrigerating state,
To cause the reduction of heat exchanger surface temperature and frosting, after air-conditioning terminates refrigeration, then air-conditioning is controlled into state is heated, to cause
Heat exchanger surface temperature is raised, and melts frosting；Heat exchange temperature detection module, is arranged at heat exchanger surface, is configured in air-conditioning
The surface temperature of detection heat exchanger in the time period freezed and heat；Wherein main control module, is configured to what is obtained according to detection
The surface temperature of heat exchanger, adjusts the refrigeration duration of air-conditioning and heats the duration.
Alternatively, main control module, is configured in the case of heat exchanger surface temperature as little as the first preset temperature, control
Heat exchanger terminates refrigeration after continuing the first Preset Time of refrigeration.
Alternatively, above-mentioned air-conditioning also includes：EAT detection module, is arranged at the air inlet of indoor set, is configured to
Detect the air intake dry-bulb temperature of heat exchanger；Wherein the first preset temperature is determined according to the air intake dry-bulb temperature of heat exchanger.
Alternatively, main control module, is configured in the case where heat exchanger surface temperature rises to the second preset temperature, control
Air-conditioning continues to terminate to heat after heating the second Preset Time；Wherein the second preset temperature and the second Preset Time are according to heat exchanger table
Face temperature ramp-up rate is determined.
Alternatively, main control module, is configured to after air-conditioning terminates refrigeration, and air-conditioning is controlled again after waiting the 3rd Preset Time
Into heating state.
Alternatively, main control module, is configured to when air-conditioner continuous refrigeration reaches four Preset Times, and control air-conditioning stops
Refrigeration, when machine is persistently heated and reaches five Preset Times indoors, control air-conditioning stops heating.
The invention provides a kind of self-cleaning control method of heat exchanger for air-conditioner indoor machine, including：Control air conditioner refrigerating, with
So that the reduction of heat exchanger surface temperature and frosting.Within the time period of air conditioner refrigerating, the surface of indoor set heat exchanger is persistently detected
Temperature.The temperature of the heat exchanger obtained according to detection, adjusts the refrigeration duration of indoor set.After refrigeration is terminated, then control
Air-conditioning heating so that heat exchanger surface temperature is raised, frost melts Cheng Shui is cleaned with heat exchanging device.In air-conditioning heating
In time period, the surface temperature of indoor set heat exchanger is persistently detected.The temperature of the heat exchanger obtained according to detection, regulation air-conditioning
Heat the duration.Air-conditioning of the invention freezes according to the temperature adjustment on indoor set heat exchanger surface and heats the duration, makes
The frosting degree appropriateness of heat exchanger surface is obtained, to reach optimal self-cleaning effect within the most short time.Compared to prior art
In, the refrigeration of fixation is set and the time is heated, self-cleaning process of the invention is more intelligent, can either prevent heat exchanger surface knot
It is white excessive, lose time and the energy, frosting degree deficiency is prevented from again causes the rinse water of follow-up thawing very few, influences self-cleaning
Effect.
Further, the step of temperature of the heat exchanger for being obtained according to detection, refrigeration duration for adjusting air-conditioning, includes：
Judge the surface temperature of heat exchanger whether as little as the first preset temperature；If so, after control air-conditioning continues the first Preset Time of refrigeration
Terminate refrigeration.When heat exchange temperature detection module detects heat exchanger surface temperature as little as the first preset temperature, main control module
Air-conditioning is controlled to continue first Preset Time that freezes again, heat exchanger frosting degree can just reach the requirement of frosting degree needed for self-cleaning,
Now master control module controls air-conditioning terminates refrigeration, stops frosting.The present invention is by rationally control cooling time so that heat exchanger table
The frosting thickness in face is suitable, improves self-cleaning effect.
Further, above-mentioned first preset temperature is determined according to the air intake dry-bulb temperature of indoor set heat exchanger.By
Related in the EAT of the frosting degree also to heat exchanger of heat exchanger surface, the EAT of heat exchanger is higher, with heat exchanger table
The temperature difference in face is bigger, easier in heat exchanger surface frosting；On the contrary, EAT is lower, the temperature difference with heat exchanger surface is got over
It is small, it is less susceptible to frosting.The present invention determines the size of the first preset temperature, more enough more rational controls according to air intake dry-bulb temperature
System refrigeration heat pamp so that frosting degree appropriateness.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
Of the invention above-mentioned and other purposes, advantages and features.
Brief description of the drawings
Describe some specific embodiments of the invention in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic block diagram of air-conditioning according to an embodiment of the invention；
Fig. 2 is the schematic block diagram of air-conditioning in accordance with another embodiment of the present invention；
Fig. 3 is the schematic diagram of the self-cleaning control method of heat exchanger for air-conditioner indoor machine according to an embodiment of the invention；
Fig. 4 is the flow chart of the self-cleaning control method of heat exchanger for air-conditioner indoor machine according to an embodiment of the invention；
And
Fig. 5 is that surface temperature is at any time during self-cleaning for heat exchanger for air-conditioner indoor machine according to an embodiment of the invention
Between change curve map.
Specific embodiment
The present embodiment provide firstly a kind of air-conditioning, and Fig. 1 is the schematic block diagram of air-conditioning according to an embodiment of the invention.
The air-conditioning includes：Heat exchanger 10, main control module 30 and heat exchange temperature detection module 20.
Heat exchanger 10 is arranged inside the indoor set of air-conditioning, as indoor set heat exchanger 10, its internal cooling matchmaker flowing with
Freeze or heat.Main control module 30 is configured to control air-conditioning and enters refrigerating state, to cause the surface temperature of heat exchanger 10 of indoor set
Degree is reduced and frosting, after machine terminates refrigeration indoors, then indoor set is controlled into state is heated, to cause indoor set heat exchanger 10
Surface temperature is raised, and melts frosting.Heat exchange temperature detection module 20 is arranged at the surface of heat exchanger 10, for mechanism cold indoors
With the surface temperature that heat exchanger 10 is detected in the time period for heating.Main control module 30 is configured to the heat exchanger obtained according to detection
10 surface temperature, adjusts the refrigeration duration of indoor set and heats the duration.In the present embodiment, air-conditioning is according to interior
The surface temperature regulation refrigeration of machine heat exchanger 10 heats the time so that the frosting degree appropriateness on the surface of heat exchanger 10, suitable to produce
The rinse water of amount, it is ensured that optimal self-cleaning effect is reached within the most short time.
Main control module 30 is configured in the case of the surface temperature of heat exchanger 10 as little as the first preset temperature, control air-conditioning
Terminate refrigeration after continuing the first Preset Time of refrigeration.In the present embodiment, air-conditioning judges heat exchange by the surface temperature of heat exchanger 10
The frosting degree of device 10.When heat exchange temperature detection module 20 detects 10 surface temperature as little as the first preset temperature of heat exchanger,
Main control module 30 controls heat exchanger 10 to continue first Preset Time that freezes again, and the frosting degree of heat exchanger 10 can just reach self-cleaning institute
The requirement of frosting degree is needed, the now control of main control module 30 heat exchanger 10 terminates refrigeration, stops frosting.Above-mentioned first preset temperature can
Set with according to factors such as the model sizes of air-conditioning heat exchanger 10, the first Preset Time can be according to the knot on the surface of heat exchanger 10
The factors such as white speed are set.
Fig. 2 is the schematic block diagram of air-conditioning in accordance with another embodiment of the present invention.In the present embodiment, air-conditioning also includes：
EAT detection module 40, is arranged at the air inlet of indoor set, is configured to detect the air intake dry bulb of indoor set heat exchanger 10
Temperature.It should be readily apparent to one skilled in the art that EAT of the frosting degree on the surface of heat exchanger 10 also to heat exchanger 10 is related, change
The EAT of hot device 10 is higher, and the temperature difference is bigger, easier in the surface frosting of heat exchanger 10.Therefore, in the present embodiment, first
Preset temperature can also be determined according to the air intake dry-bulb temperature of indoor set heat exchanger 10.Specifically, the first preset temperature can
It is determined with according to below equation：
T=α × Te-A；Wherein
T：First preset temperature；α：Coefficient；Te：The air intake dry-bulb temperature of indoor heat exchanger 10；A：Constant.And it is in above formula
The numerical value of number α and constant A can be determined by multigroup varying environment working condition experimenting.
From above-mentioned formula, we can see that the first preset temperature and the air intake dry-bulb temperature of indoor heat exchanger 10 are into just
Than.That is, when the air intake dry-bulb temperature Te of heat exchanger 10 is higher, corresponding first preset temperature T is set to a higher temperatures
Degree, to prevent the excessive surface frosting of heat exchanger 10, wastes the working time of the energy and air-conditioning；When the air intake dry-bulb temperature of heat exchanger 10
When Te is relatively low, corresponding first preset temperature T is set to a lower temperature, to prevent the surface frosting of heat exchanger 10 not enough, influence
The self-cleaning effect of heat exchanger 10.
After air-conditioner continuous freeze the first Preset Time, compressor 60 is shut down and stops refrigeration, and is waited into heating defrosting
State.
After air conditioner refrigerating, the temperature of its indoor heat exchanger 10 is generally relatively low, if now directly heating, heat exchanger 10 is short
Temperature change is excessive in time, and easily air-conditioning is caused damage.Main control module 30 be configured to machine indoors terminate refrigeration after, etc.
After after the 3rd Preset Time, four-way valve 50 commutates, and compressor 60 is again turned on, and controls indoor set to enter and heats state.In this reality
In applying example, air-conditioning terminates after refrigeration not directly into heating the defrosting stage, but is carried out again after the 3rd Preset Time is spaced
Heat, protected with heat exchanging device 10.
Main control module 30 is configured to, in the case where the surface temperature of heat exchanger 10 rises to the second preset temperature, control air-conditioning
Continue to terminate to heat after heating the second Preset Time.According to foregoing teachings, air-conditioning judges heat exchange by the surface temperature of heat exchanger 10
The frosting degree of device 10.When heat exchange temperature detection module 20 detects the surface temperature of heat exchanger 10 rises to the second preset temperature,
Main control module 30 controls heat exchanger 10 to continue to heat the second Preset Time again, and the frosting degree of heat exchanger 10 just can completely be melted into water,
Moisture will take away dust of the absorption on the surface of heat exchanger 10, and the now control of main control module 30 compressor 60 is shut down, and controls heat exchanger
10 terminate to heat.
In the present embodiment, above-mentioned second preset temperature and the second Preset Time can be according to the surface temperatures of heat exchanger 10
Ramp-up rate be determined.Specifically, when the ramp-up rate of the surface temperature of heat exchanger 10 is slower, can be by the second default temperature
Degree is set as a relatively low temperature value a, and corresponding second Preset Time is set as a longer time Y, to ensure heat exchanger 10
The heat of appropriateness is produced, the energy is not wasted to melt frosting completely simultaneously.The surface temperature of heat exchanger 10 ramp-up rate compared with
When fast, the second preset temperature can be set as a temperature value b higher, corresponding second Preset Time is set as that one is shorter
Time Z.For example, air-conditioning can pre-set two time control rules for heating the defrosting stage.Control rule 1：Work as heat exchanger
After 10 temperature reach a=15 degrees Celsius, defrosting is terminated after persistently heating Y=20 seconds；Control rule 2：When coil temperature reaches b=
After 30 degrees Celsius, defrosting is terminated after persistently heating Z=5 seconds.When the rate of rise in temperature of heat exchanger 10 is less than default threshold speed
V0When, then can be adjusted using the time that heats of above-mentioned control 1 pair of air-conditioning of rule；When the rate of rise in temperature of heat exchanger 10 is super
Cross default threshold speed V0When, then can be adjusted using the time that heats of above-mentioned control 2 pairs of air-conditionings of rule.Certainly, exist
In other embodiment, multiple control rules can also be set according to the surface temperature rate of climb of heat exchanger 10, with to air-conditioning
The defrosting time that heats carry out finer regulation.
Main control module 30 is configured to machine indoors and persistently freezes when reaching four Preset Times, and control indoor set stops system
Cold, when machine is persistently heated and reaches five Preset Times indoors, control indoor set stops heating.In the present embodiment, to avoid
Cannot be normally entered during the self-cleaning caused by various factors heat the defrosting stage or cannot normal termination heat defrosting rank
Section, the longest run time for allowing compressor 60 to run when increasing refrigeration in self-cleaning function, i.e. the 4th Preset Time, and system
Compressor 60 is allowed to run longest run time, i.e. the 5th Preset Time when hot.When air conditioner refrigerating is more than four Preset Times
Stop refrigeration, though the surface temperature of heat exchanger 10 be not up to the first preset temperature or refrigerating operaton it is default not less than first when
Between, the also forced stoppage of compressor 60, to ensure that air-conditioning normally enters the defrosting stage.When air-conditioning heating is more than five Preset Times
Stopping is heated, though the surface temperature of heat exchanger 10 be not up to the second preset temperature or heating operation it is default not less than second when
Between, the also forced stoppage of compressor 60, to ensure the air-conditioning normal termination defrosting stage.
The present embodiment additionally provides a kind of method for self-cleaning of heat exchanger for air-conditioner indoor machine 10, and Fig. 3 is according to the present invention one
The schematic diagram of the self-cleaning control method of the heat exchanger for air-conditioner indoor machine 10 of individual embodiment.The method for self-cleaning specifically refers to first control
Air-conditioning processed enters refrigerating state, the reduction of the surface temperature of heat exchanger 10 and frosting, then, then converts the change refrigerant stream of four-way valve 50
To control air-conditioning entrance heats state.The frost for condensing in the surface of heat exchanger 10 starts to be melted into water, and takes away absorption in heat exchanger
The dust on 10 surfaces, realizes the purpose of the self-cleaning of heat exchanger 10.The above method includes：
Step S302, controls air conditioner refrigerating, to cause the reduction of the surface temperature of indoor set heat exchanger 10 and frosting.
Step S304, within the time period of air conditioner refrigerating, persistently detects the surface temperature of heat exchanger 10.
Step S306, the surface temperature of the heat exchanger 10 obtained according to detection adjusts the refrigeration duration of air-conditioning.At this
In embodiment, air-conditioning judges the frosting degree of heat exchanger 10 by the surface temperature of heat exchanger 10.Temperature of the air-conditioning according to heat exchanger 10
Cooling time is determined, to cause the surface frosting degree appropriateness of heat exchanger 10.
Step S308, after air-conditioning terminates refrigeration, then controls air-conditioning heating so that the surface temperature liter of indoor set heat exchanger 10
Height, frost melts Cheng Shui is cleaned with heat exchanging device 10.
Step S310, within the time period of air-conditioning heating, persistently detects the surface temperature of indoor set heat exchanger 10.
Step S312, the surface temperature of the heat exchanger 10 obtained according to detection, adjust air-conditioning heats the duration.Air-conditioning
Temperature according to heat exchanger 10 determines to heat the time, to cause the surface frost melts of heat exchanger 10 complete, it is ensured that self-cleaning effect.
Fig. 4 is the flow of the self-cleaning control method of heat exchanger for air-conditioner indoor machine according to an embodiment of the invention 10
Figure, the method performs following steps successively：
Step S402, after air-conditioning opens self-cleaning function, controls air conditioner refrigerating, to cause the surface of indoor set heat exchanger 10
Temperature reduction and frosting.
Step S404, within the time period of air conditioner refrigerating, persistently detects the surface temperature of heat exchanger 10.
Whether as little as step S406, judge the surface temperature of heat exchanger 10 first preset temperature.
Step S408, if the judged result of step S406 is yes, control air-conditioning terminates after continuing the first Preset Time of refrigeration
Refrigeration.In the present embodiment, air-conditioning judges the frosting degree of heat exchanger 10 by the surface temperature of heat exchanger 10.When heat exchange temperature inspection
When survey module 20 detects surface temperature as little as the first preset temperature of heat exchanger 10, main control module 30 controls air-conditioning to continue to freeze again
First Preset Time, the frosting degree of heat exchanger 10 can just reach the requirement of frosting degree needed for self-cleaning, and now main control module 30 is controlled
Air-conditioning processed terminates refrigeration, stops frosting.Above-mentioned first preset temperature can be set according to the model size of air-conditioning heat exchanger 10,
First Preset Time can be set according to the frosting velocity on the surface of heat exchanger 10.
Step S410, if the judged result of step S406 is no, continue to judge lasting refrigeration whether reach the 4th it is default when
Between.
Step S412, if the judged result of step S410 is yes, stops refrigeration immediately.In the present embodiment, to avoid
Cannot be normally entered during the self-cleaning caused by various factors and heat the defrosting stage, when increasing refrigeration in self-cleaning function
The longest run time for allowing compressor 60 to run, i.e. the 4th Preset Time.Stop when air conditioner refrigerating is more than four Preset Times
Only freeze, even if the surface temperature of heat exchanger 10 is not up to the first preset temperature or refrigerating operaton not less than the first Preset Time,
The also forced stoppage of compressor 60, to ensure that air-conditioning normally enters the defrosting stage.
Step S414, after air-conditioning terminates refrigeration, controls indoor set entrance to heat state again after waiting the 3rd Preset Time.
After air conditioner refrigerating, the temperature of its indoor set heat exchanger 10 is generally relatively low, if now directly heating, heat exchanger 10 is in a short time
Temperature change is excessive, and easily air-conditioning is caused damage.Main control module 30 is configured to after air-conditioning terminates refrigeration, and wait the 3rd is pre-
If controlling air-conditioning to enter after the time again heats state.In the present embodiment, air-conditioning melts not directly into heating after terminating refrigeration
The white stage, but heated again after the 3rd Preset Time is spaced, protected with heat exchanging device 10.
Step S416, within the time period of air-conditioning heating, persistently detects the surface temperature of indoor set heat exchanger 10.
Step S418, judges whether the surface temperature of heat exchanger 10 rises to the second preset temperature.
Step S420, if the judged result of step S418 is yes, control air-conditioning continues to terminate after heating the second Preset Time
Heat.According to foregoing teachings, air-conditioning judges the frosting degree of heat exchanger 10 by the surface temperature of heat exchanger 10.When heat exchange temperature inspection
When surveying module 20 and detecting the surface temperature of heat exchanger 10 and rise to the second preset temperature, main control module 30 controls air-conditioning to continue to heat again
Second Preset Time, now, the frosting of heat exchanger 10 is melted into water completely, and the control compressor 60 of main control module 30 is shut down, controlled
Air-conditioning terminates to heat.
Step S422, if the judged result of step S418 is no, continue to judge persistently to heat whether reach the 5th it is default when
Between.
Step S424, if the judged result of step S422 is yes, stops heating immediately.
Step S426, self-cleaning is terminated after waiting the 6th Preset Time.After end is heated, the 6th Preset Time is waited,
Inner compressor 60 does not work during this period, waits the moisture condensation for melting to depart from heat exchanger 10 into water droplet, makes the surface of heat exchanger 10
Fully dry, to complete self-cleaning process.The sewage come off after cleaning is fallen into the water-supporting disc of indoor motor spindle, is then discharged out room
Interior machine.
Fig. 5 be heat exchanger for air-conditioner indoor machine according to an embodiment of the invention 10 during self-cleaning surface temperature with
The curve map of time change.Figure includes upper and lower two curve maps, and self-cleaning process twice is represented respectively.In order to more clearly
The whole self-cleaning process of air-conditioning is described, is further described below in conjunction with Fig. 5.
As shown in figure 5, abscissa represents the time, the origin of coordinates represents air-conditioning self-cleaning and starts.Ordinate represents indoor set
The surface temperature of heat exchanger 10.After air-conditioning self-cleaning function is opened, compressor 60 starts, air conditioner refrigerating, the surface temperature of heat exchanger 10
Degree declines, and starts frosting.When temperature drop is to the first preset temperature (the temperature T shown in figure), air-conditioning opens timing work(
Can, when by (the time period X i.e. shown in figure) after the first Preset Time, close compressor 60 stops refrigeration, terminates frosting.Knot
After frost terminates, the 3rd Preset Time (the time period U i.e. shown in figure) is waited.The surface temperature of heat exchanger 10 will go up, frosting
Can slowly melt.After the 3rd Preset Time terminates, compressor 60 is again turned on, and four-way valve 50 commutates, and indoor apparatus of air conditioner is opened
Heat.The surface temperature of heat exchanger 10 is further raised, and frosting is further melted into water, and the water of thawing will take away absorption in heat exchanger
The dust and dirt on 10 surfaces, realize the cleaning of heat exchanging device 10.When temperature rises to the second preset temperature, air-conditioning opens meter
Shi Gongneng, when by after the second Preset Time, close compressor 60 stops heating, and terminates defrosting.After defrosting terminates, the 6th is waited
Terminate self-cleaning process after Preset Time.
Second preset temperature and the second Preset Time can be carried out really according to the ramp-up rate of the surface temperature of heat exchanger 10
It is fixed.When the ramp-up rate of the surface temperature of heat exchanger 10 is slower, the situation as shown in curve I can set the second preset temperature
It is set to a relatively low temperature value a, corresponding second Preset Time is set as a longer time Y, to ensure that heat exchanger 10 is produced
The heat of appropriateness, can completely melt frosting just.When the ramp-up rate of the surface temperature of heat exchanger 10 is very fast, such as the institute of curve II
Situation about showing, can be set as a temperature value b higher by the second preset temperature, corresponding second Preset Time be set as one compared with
Short time Z.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple of the invention and show
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (12)
1. the self-cleaning control method of a kind of heat exchanger for air-conditioner indoor machine, including：
The air conditioner refrigerating is controlled, to cause the heat exchanger surface temperature reduction and frosting；
Within the time period of the air conditioner refrigerating, the surface temperature of the heat exchanger is persistently detected；
The surface temperature of the heat exchanger obtained according to detection, adjusts the refrigeration duration of the air-conditioning；
After the air-conditioning terminates refrigeration, then control the air-conditioning heating so that the heat exchanger surface temperature is raised, frosting is melted
Chemical conversion water, cleans with to the heat exchanger surface；
Within the time period of the air-conditioning heating, the surface temperature of the heat exchanger is persistently detected；And
The surface temperature of the heat exchanger obtained according to detection, adjust the indoor set heats the duration.
2. control method according to claim 1, wherein the surface temperature of the heat exchanger obtained according to detection, regulation
The step of refrigeration duration of the air-conditioning, includes：
Judge the surface temperature of the heat exchanger whether as little as the first preset temperature；
If so, controlling the air-conditioning to terminate refrigeration after continuing the first Preset Time of refrigeration.
3. control method according to claim 2, wherein
First preset temperature is determined according to the air intake dry-bulb temperature of the heat exchanger.
4. control method according to claim 1, wherein the surface temperature of the heat exchanger obtained according to detection, regulation
The air-conditioning includes the step of heating the duration：
Judge whether the surface temperature of the heat exchanger rises to the second preset temperature；
If so, controlling the air-conditioning to continue to terminate to heat after heating the second Preset Time；Wherein
Second preset temperature and second Preset Time are determined according to the heat exchanger surface temperature ramp-up rate.
5. control method according to claim 1, wherein
Control the air-conditioning to enter again after the air-conditioning terminates refrigeration, after the 3rd Preset Time of wait and heat state.
6. control method according to any one of claim 1 to 5, also includes：
Stop refrigeration after air-conditioner continuous refrigeration reaches the 4th Preset Time；
Stop heating after the air-conditioner continuous are heated and reach the 5th Preset Time.
7. a kind of air-conditioning, including：
Heat exchanger, is arranged inside the indoor set of the air-conditioning, and its internal cooling matchmaker is flowed to freeze or heat；
Main control module, is configured to control the air-conditioning to enter refrigerating state, to cause that the heat exchanger surface temperature is reduced and tied
Frost, after the air-conditioning terminates refrigeration, then controls the air-conditioning into state is heated, to cause the heat exchanger surface temperature liter
Height, melts frosting；With
Heat exchange temperature detection module, is arranged at the heat exchanger surface, is configured in the air conditioner refrigerating and the time for heating
The surface temperature of the detection heat exchanger in section；Wherein
The main control module, is configured to according to the surface temperature for detecting the heat exchanger for obtaining, and the refrigeration for adjusting the air-conditioning is held
Continue the time and heat the duration.
8. air-conditioning according to claim 7, wherein
The main control module, is configured in the case of the heat exchanger surface temperature as little as the first preset temperature, control institute
State after heat exchanger continues the first Preset Time of refrigeration and terminate refrigeration.
9. air-conditioning according to claim 8, also includes：
EAT detection module, is arranged at the air inlet of the indoor set, is configured to detect that entering for the heat exchanger is air-dried
Ball temperature；Wherein
First preset temperature is determined according to the air intake dry-bulb temperature of the heat exchanger.
10. air-conditioning according to claim 7, wherein
The main control module, is configured to, in the case where the heat exchanger surface temperature rises to the second preset temperature, control institute
Air-conditioning is stated to continue to terminate to heat after heating the second Preset Time；Wherein
Second preset temperature and second Preset Time are determined according to the heat exchanger surface temperature ramp-up rate.
11. air-conditionings according to claim 7, wherein
The main control module, is configured to after the air-conditioning terminates refrigeration, and the sky is controlled again after waiting the 3rd Preset Time
Transfer in into heating state.
12. air-conditioning according to any one of claim 7 to 11, wherein
The main control module, is configured to, when air-conditioner continuous refrigeration reaches four Preset Times, control the air-conditioning to stop
Only freeze；When the indoor set is persistently heated and reaches five Preset Times, the air-conditioning is controlled to stop heating.
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Application publication date: 20170627 |