CN110207278A - The control method of air conditioner and air conditioner - Google Patents
The control method of air conditioner and air conditioner Download PDFInfo
- Publication number
- CN110207278A CN110207278A CN201910452462.XA CN201910452462A CN110207278A CN 110207278 A CN110207278 A CN 110207278A CN 201910452462 A CN201910452462 A CN 201910452462A CN 110207278 A CN110207278 A CN 110207278A
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- Prior art keywords
- heat exchanger
- outdoor
- outdoor heat
- pipeline
- defrost
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
Abstract
The application proposes the control method of a kind of air conditioner and air conditioner, compressor, indoor unit, outdoor unit and first throttling device including connecting into air conditioner loop, and first throttling device is arranged between indoor machine and outdoor unit；Outdoor unit includes the outdoor heat exchanger of N number of parallel connection, and any outdoor heat exchanger is correspondingly arranged on first pipeline, second pipeline and a first control device, and N is not less than 2；The first end of first pipeline is connected with the first port of corresponding outdoor heat exchanger, and the second end of the first pipeline is connected with first throttling device；The first end of second pipeline is connected with the first port of corresponding outdoor heat exchanger, and the second end of the second pipeline is connected with the exhaust outlet of compressor；First control device, for controlling the opening and closing for corresponding to the second pipeline of same outdoor heat exchanger.The air conditioner and control method that the application proposes, have realized white defrost, frostless not change, and improve defrost efficiency, save heat consumption.
Description
Technical field
This application involves field of air conditioning, the in particular to control method of air conditioner and air conditioner.
Background technique
Air-conditioning in winter heating operation when, absorb heat from indoor unit heat release from outdoor unit, therefore making when air-conditioning longtime running
When heat pattern, outdoor unit will frosting, in order to outdoor unit carry out defrost, need to outdoor unit carry out defrost, in the prior art
Air-conditioning is run in a chiller mode when carrying out defrost, and room temperature reduces at this time, causes user experience low.
In the prior art, outdoor heat exchanger is an entirety, and when outdoor unit frosting, not same district on outdoor heat exchanger
The frosting situation in domain is different, and refrigerant flows successively through entire heat exchanger when carrying out defrost, and defrosting process does not have emphasis, does not tie
The region of frost is not necessarily to defrost, but refrigerant has really carried out heat release in the region of not frosting, and the serious region of frosting needs emphasis
Frost, but refrigerant does not concentrate heat release in the serious region of frosting, causes defrost efficiency low.
Summary of the invention
This application provides the control methods of a kind of air conditioner and air conditioner, at least partly to solve the above problems.
To solve the above-mentioned problems, as the one aspect of the application, a kind of air conditioner is provided, including connects into air-conditioning
Compressor, indoor unit, outdoor unit and the first throttling device in circuit, first throttling device setting indoors machine and outdoor unit it
Between；
Outdoor unit includes the outdoor heat exchanger of N number of parallel connection, and any outdoor heat exchanger is correspondingly arranged on the first pipeline, one
A second pipeline and a first control device, N are not less than 2；
The first port of the first end of first pipeline and corresponding outdoor heat exchanger connects, the second end of the first pipeline and the
One throttling set is connected；
The first end of second pipeline is connected with the first port of corresponding outdoor heat exchanger, the second end and pressure of the second pipeline
The exhaust outlet of contracting machine is connected；
First control device, for controlling the opening and closing for corresponding to the second pipeline of same outdoor heat exchanger.
Optionally, further includes: bypass line, the first end of bypass line are connected with the exhaust outlet of compressor, Ge Ge
The second end of two pipelines is connected with the second end of bypass line, and the second pipeline is connected to the exhaust of compressor by bypass line
Mouthful；
Second throttling device is provided on bypass line, and/or, control valve is provided on bypass line.
Optionally, first control device is also used to control the opening and closing for the first pipeline for corresponding to same outdoor heat exchanger；
And/or first control device is also used to control the opening and closing of corresponding outdoor heat exchanger.
Optionally, first control device is the first triple valve；
First connector of the first triple valve is connected with the first port of corresponding outdoor heat exchanger；
Second connector of the first triple valve is connected with the first end for the first pipeline for corresponding to same outdoor heat exchanger
It connects；
The third connector of first triple valve is connected with the first end for the second pipeline for corresponding to same outdoor heat exchanger.
Optionally, further includes:
Any outdoor heat exchanger is correspondingly arranged on a third pipeline, the 4th pipeline and a second control device；
The first end of third pipeline is connected with the second port of outdoor heat exchanger, is provided with check valve on third pipeline,
Refrigerant can only flow to second end from the first end of third pipeline；
4th pipeline is arranged in parallel with third pipeline, and the first end of the 4th pipeline is connected with the second port of outdoor heat exchanger
It connects；
Second control device is arranged with third pipeline and the 4th pipeline contact, corresponds to same outdoor heat exchange for controlling
The opening and closing of the third pipeline and the 4th pipeline of device.
The application also proposes a kind of control method of air conditioner, for controlling any air conditioner of the application proposition, comprising:
Detecting step determines the target heat exchanger for needing to carry out defrost；
Defrost step, control air conditioner are run with heating mode, and are controlled target heat exchanger and carried out defrost；
Wherein, when target heat exchanger carries out defrost, the corresponding first control control device of target heat exchanger opens target
Corresponding second pipeline of heat exchanger, so that the refrigerant of exhaust outlet of compressor discharge flows into target heat exchanger through the second pipeline
Frost, control first control device is so that corresponding second pipeline of outdoor heat exchanger without carrying out defrost is closed.
Optionally, when first control device is also used to control the opening and closing for the first pipeline for corresponding to same outdoor heat exchanger
When, control method further include:
When target heat exchanger carries out defrost, the corresponding first control control device of target heat exchanger is closed corresponding to same
First pipeline of target heat exchanger, so that refrigerant can not flow into target heat exchanger through the first pipeline.
Optionally, detecting step, further includes: determine the corresponding defrost pattern of each target heat exchanger；
Defrost step, further includes: control target heat exchanger enters corresponding defrost pattern；
Wherein, defrost pattern includes: the first defrost pattern and the second defrost pattern；
The cold medium flux of first defrost pattern is greater than the cold medium flux of the second defrost pattern, and/or, the first defrost pattern
Defrost duration is greater than the defrost duration of the second defrost pattern.
Optionally, detecting step, including；
Monitor the tube temperature of outdoor temperature and each outdoor heat exchanger；
The target heat exchanger and mesh for needing to carry out defrost are determined according to outdoor temperature and the tube temperature of each outdoor heat exchanger
Mark the corresponding defrost pattern of heat exchanger.
Optionally, the target heat exchanger for needing to carry out defrost is determined according to outdoor temperature and the tube temperature of each outdoor heat exchanger
And the corresponding defrost pattern of target heat exchanger, comprising:
When outdoor temperature is greater than outdoor temperature threshold value, if the tube temperature of each outdoor heat exchanger is all larger than defrost operating temperature
Tj, then each outdoor heat exchanger does not need to carry out defrost；
And/or when outdoor temperature is greater than outdoor temperature threshold value, the tube temperature of at least one outdoor heat exchanger is little if it exists
In defrost operating temperature Tj, and there are the tube temperatures of at least one outdoor heat exchanger to be greater than defrost operating temperature Tj, it is determined that tube temperature
Outdoor heat exchanger no more than defrost operating temperature Tj is first kind target heat exchanger, from tube temperature greater than defrost operating temperature Tj's
The smallest outdoor heat exchanger of tube temperature is obtained in outdoor heat exchanger as the second class target heat exchanger；
And/or when outdoor temperature is greater than outdoor temperature threshold value, if the tube temperature of each outdoor heat exchanger is no more than defrost
Operating temperature Tj, it is determined that whole outdoor heat exchangers are first kind target heat exchanger；
Wherein, corresponding first defrost pattern of first kind target heat exchanger, the corresponding second defrost mould of the second class target heat exchanger
Formula.
Optionally, the target heat exchanger for needing to carry out defrost is determined according to outdoor temperature and the tube temperature of each outdoor heat exchanger
And the corresponding defrost pattern of target heat exchanger, comprising:
When outdoor temperature is not more than outdoor temperature threshold value, if the average value Tp of the tube temperature of each heat exchanger is no more than average
It is worth threshold value Td, it is determined that each outdoor heat exchanger is as first kind target heat exchanger；
And/or
When outdoor temperature is not more than outdoor temperature threshold value, the average value Tp of the tube temperature of each heat exchanger is greater than average value threshold value
Td, and the absolute value of the tube temperature difference between the highest outdoor heat exchanger of tube temperature and the minimum outdoor heat exchanger of tube temperature is no more than most
When big permission tube temperature temperature difference Tc, then each heat exchanger does not need to carry out defrost；
And/or
When outdoor temperature is not more than outdoor temperature threshold value, the average value Tp of the tube temperature of each heat exchanger is greater than average value threshold value
Td, and when the absolute value of the difference of highest tube temperature and minimum tube temperature is greater than maximum allowable tube temperature temperature difference Tc, it is highest to obtain tube temperature
Growth rate a of the absolute value of tube temperature difference between outdoor heat exchanger and the minimum outdoor heat exchanger of tube temperature in n minutes first, if
A is less than growth rate threshold value f, then each outdoor heat exchanger does not need to carry out defrost；
And/or
N=4, when outdoor temperature is not more than outdoor temperature threshold value, the average value Tp of the tube temperature of each heat exchanger is greater than average
It is worth threshold value Td, and when the absolute value of the difference of highest tube temperature and minimum tube temperature is greater than maximum allowable tube temperature temperature difference Tc, obtains tube temperature
Growth of the absolute value of tube temperature difference between highest outdoor heat exchanger and the minimum outdoor heat exchanger of tube temperature in n minutes first
Rate a
If a is not less than growth rate threshold value f, each outdoor heat exchanger is ranked up from low to high according to tube temperature and is changed
Hot device sequence, according to tube temperature, each outdoor heat exchanger is followed successively by the first outdoor heat exchanger, the second outdoor heat exchanger, from low to high
Three outdoor heat exchangers and fourth ventricle external heat exchanger obtain the tube temperature difference between third outdoor heat exchanger and fourth ventricle external heat exchanger
Growth rate b of the absolute value in n minutes first, obtain the tube temperature difference between the second outdoor heat exchanger and third outdoor heat exchanger
Growth rate c of the absolute value in n minutes first, obtain the tube temperature difference between the first outdoor heat exchanger and the second outdoor heat exchanger
Growth rate d of the absolute value in n minutes first；
If b < a/3, c < a/3, and d >=a/3, it is determined that the first outdoor heat exchanger be first kind target heat exchanger, second
Outdoor heat exchanger is the second class target heat exchanger；Alternatively,
If b < a/3 and c >=a/3, it is determined that the first outdoor heat exchanger and the second outdoor heat exchanger are the heat exchange of first kind target
Device, the second outdoor heat exchanger are the second class target heat exchanger
If b >=a/3, it is determined that the first outdoor heat exchanger, the second outdoor heat exchanger and third outdoor heat exchanger are the first kind
Target heat exchanger, fourth ventricle external heat exchanger are the second class target heat exchanger,
Wherein, corresponding first defrost pattern of first kind target heat exchanger, the corresponding second defrost mould of the second class target heat exchanger
Formula.
Present applicant proposes the control method of a kind of air conditioner and air conditioner, multiple outdoor heat exchangers in outdoor unit are each other
Parallel connection, and the second pipeline is set, the first port of each outdoor unit heat exchanger is connected with the exhaust outlet of compressor, for needing
The outdoor heat exchanger of defrost is wanted to carry out defrost, without the outdoor heat exchanger not defrost of defrost, so that white defrost has been realized, it is frostless
Do not change, improve defrost efficiency, saves heat consumption.
Detailed description of the invention
Fig. 1 is a kind of structure chart of air conditioner in the embodiment of the present application；
Fig. 2 is a kind of control method flow chart of air conditioner in the embodiment of the present application；
Fig. 3 is the control method flow chart of another air conditioner in the embodiment of the present application.
Appended drawing reference in figure: 1, compressor；10, check valve；11, exhaust outlet；2, indoor unit；3, outdoor unit；30, outdoor is changed
Hot device；31, the first pipeline；32, the second pipeline；33, third pipeline；34, the 4th pipeline；35, temperature-detecting device；41, first
Throttling set；42, second throttling device；51, first control device；52, second control device；6, four-way valve；7, heating device；
8, bypass line；9, control valve；
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Covering non-exclusive includes to be not necessarily limited to for example, containing the process, method of a series of steps or units, device, product or device
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that device is intrinsic.
In the prior art, outdoor heat exchanger is an entirety in outdoor unit of the air conditioner, when carrying out defrost, high temperature
Refrigerant heats entire outdoor heat exchanger, cannot achieve targetedly defrost, causes defrost efficiency low.
In order to solve the above-mentioned technical problem, it as shown in Figure 1, the application proposes a kind of air conditioner, including connects into air-conditioning and returns
Machine 2 and outdoor indoors is arranged in compressor 1, indoor unit 2, outdoor unit 3 and the first throttling device 41 on road, first throttling device 41
Between machine 3；Air conditioner in the application can be the air conditioner that can only be heated, can also be at this time without using four-way valve 6
It is the air conditioner for being able to carry out refrigeration and heating, needs to commutate using four-way valve 6 at this time, specific connection type is existing
There is technology, will herein be described in detail, can refer to illustrations 1.Outdoor unit 3 includes the outdoor heat exchanger 30 of N number of parallel connection, any outdoor
Heat exchanger 30 is correspondingly arranged on 31, second pipelines 32 of first pipeline and a first control device 51, and N is not less than 2；
The first end of first pipeline 31 is connected with the first port of corresponding outdoor heat exchanger 30, the second end and first of the first pipeline 31
Throttling set 41 is connected；The first end of second pipeline 32 is connected with the first port of corresponding outdoor heat exchanger 30, the second pipe
The second end on road 32 is connected with the exhaust outlet 11 of compressor 1；First control device 51 is changed for controlling corresponding to same outdoor
The opening and closing of second pipeline 32 of hot device 30.
Room is worked as because being provided with multiple outdoor heat exchangers in an outdoor unit for the air conditioner that the application proposes
When outer machine frosting needs defrost, the degree of each outdoor heat exchanger frosting can be first determined, if there is part outdoor heat exchanger 30
Defrost is needed, and another part outdoor heat exchanger 30 does not have to defrost, then the room for needing defrost is controlled by first control device 51
Corresponding second pipeline 32 of external heat exchanger is opened, and the refrigerant for the high temperature and pressure that the exhaust outlet 11 of compressor 1 is discharged can pass through
Second pipeline 32, which flows into, needs the outdoor heat exchanger of defrost, and the outdoor heat exchanger 30 for not needing defrost, so that it may pass through
First control device closes corresponding second pipeline, and the refrigerant for the high temperature and pressure that such compressor 1 is discharged, which would not flow into, to be not necessarily to
The outdoor heat exchanger of defrost, so as to realize white defrost, frostless not defrost.For example, using Fig. 1 as reference, in Fig. 1 most
The outdoor heat exchanger 30 of top needs defrost, and other outdoor heat exchangers do not need defrost, then in Fig. 1 the top outdoor heat exchange
Corresponding second pipeline 32 of device is opened, and corresponding second pipeline of the hot device of other outdoorizations is closed, and control air-conditioning is transported with heating mode
Row, refrigerant a part that compressor 1 is discharged is by entering each outdoor unit, another portion that compressor 1 is discharged after 2 heat release of indoor unit
The outdoor heat exchanger for dividing refrigerant to enter the top in Fig. 1 by the second pipeline 32, to carry out defrost to it.It is of course also possible to
Indoor unit is closed in defrost, refrigerant directly enters the outdoor heat exchanger for needing defrost from compressor at this time.
In the prior art, it is not arranged in parallel outdoor heat exchanger in outdoor unit, even if in outdoor heat exchanger being part
Frosting is also required to carry out defrost to outdoor heat exchanger whole in entire outdoor unit, so that the waste of energy is caused, meanwhile, it uses
The air conditioner that the application proposes, in winter when defrost, without shutting down, air conditioner still can be run indoor unit with heating mode, be pressed
The refrigerant a part for the high temperature and pressure that contracting machine 1 is discharged carries out defrost, and another part flows after indoor unit heat release from the first pipeline 31
Enter each outdoor heat exchanger 30, so the air-conditioning of the application proposition air-conditioning in defrost can be normally carried out heating, will not reduce
Room temperature, to improve user experience.
In some alternative embodiments, please continue to refer to Fig. 1 (bypass line 8 and the second dotted line table of pipeline 32 in figure
Show, being intended merely to distinguish with the pipeline conveniently indicated with solid line, conveniently checking, the arrow in figure is cold when carrying out defrost
Matchmaker's flow direction), the air conditioner that the application proposes further includes bypass line 8, the first end of bypass line 8 and the exhaust outlet of compressor 1
11 are connected, and the second end of each second pipeline 32 is connected with the second end of bypass line 8, and the second pipeline 32 passes through bypass pipe
Road 8 is connected to the exhaust outlet 11 of compressor 1；Second throttling device 42 is provided on bypass line 8, and/or, on bypass line 8
It is provided with control valve 9.Distributing to when by the way that the adjustable defrost of control valve being arranged on bypass line 8 needs the outdoor of defrost to change
The coolant quantity of hot device, and it is the pressure in order to adjust refrigerant that second throttling device, which is arranged, because using heating mode in air conditioner
When defrost, indoor unit can be opened still, and refrigerant will become low-temp low-pressure using first throttling device by indoor unit at this time
Refrigerant, and the refrigerant that compressor 1 is expelled directly out be high temperature and pressure refrigerant, even if outdoor heat exchanger cooling after refrigerant still
In high pressure conditions, when high pressure conditions refrigerant and the low pressure refrigerant Jing Guo first throttling device 41 outdoor unit second port
After place converges, high pressure refrigerant will hinder the refrigerant flowing of indoor unit outflow, while biggish draught head to flowing at low pressure refrigerant
Variation will generate air explosion, be easily damaged pipeline, influence service life, therefore, using second throttling device 42 by bypass pipe
Coolant throttle at road is at low-pressure state, the pressure and temperature phase of the refrigerant converged at outdoor heat exchanger second port each in this way
Closely, biggish thermal change and pressure change will not be generated, guarantees air conditioner stable operation, while extending the use longevity of air conditioner
Life.
In some alternative embodiments, first control device 51, which is also used to control, corresponds to same outdoor heat exchanger 30
The opening and closing of first pipeline 31；And/or first control device 51 is also used to control the opening and closing of corresponding outdoor heat exchanger 30.First
It includes multiple switch valve that control device 51, which can be, such as may include that switch valve is arranged on the hot device of each indoor unitization,
It may include that switch valve is set on each second pipeline, may include that switch valve is set on each first pipeline, it is logical in this way
The opening and closing that each switch valve realizes outdoor heat exchanger, the first pipeline and the second pipeline is overregulated, switch valve can be solenoid valve.
In some alternative embodiments, first control device 51 is the first triple valve；First connection of the first triple valve
Mouth is connected with the first port of corresponding outdoor heat exchanger 30；Second connector of the first triple valve with correspond to same outdoor
The first end of first pipeline 31 of heat exchanger 30 is connected；The third connector of first triple valve with correspond to same outdoor heat exchange
The first end of second pipeline 32 of device 30 is connected.
As shown in Figure 1, there are three states for the first triple valve tool, first is that closed state, each connector of the first triple valve
It is closed, refrigerant can not pass through the first triple valve；Second is that the on state of the first connector and the second connector, refrigerant can at this time
To flow into outdoor heat exchanger 30 through the first pipeline 31, and the second pipeline 32 is in blocking state, and refrigerant can not be from the second pipeline 32
Flow into outdoor heat exchanger 30；Third is that the on state of the first connector and third connector.I.e. at any one time, the first connector
It can be only in blocking state or the first connector and a state being connected in the second connector and third connector.
In some alternative embodiments, the air conditioner that the application proposes, further includes:
Any outdoor heat exchanger 30 is correspondingly arranged on a third pipeline 33, the 4th pipeline 34 and one second control
Device 52；The first end of third pipeline 33 is connected with the second port of outdoor heat exchanger 30, is provided with list on third pipeline 33
To valve 10, refrigerant can only flow to second end from the first end of third pipeline 33；
4th pipeline 34 is arranged in parallel with third pipeline 33, the first end of the 4th pipeline 34 and the second of outdoor heat exchanger 30
Port is connected；Second control device 52 contacts setting with third pipeline 33 and the 4th pipeline 34, for controlling corresponding to same
The opening and closing of the third pipeline 33 and the 4th pipeline 34 of outdoor heat exchanger 30.
The second control device 52 that the application proposes for example can be triple valve, be also possible to manage in third pipeline and the 4th
Two switch valves are respectively set in road, when the refrigerant in outdoor heat exchanger 30 is from the first port of outdoor heat exchanger to second end
When mouth flowing, the third pipeline 33 that can control outdoor heat exchanger is opened, and the 4th pipeline is closed, and such refrigerant passes through check valve
10, check valve 10 can anti-backflow.
Illustrate that the application is preferred below, air conditioner carries out control mode when defrost, when the air conditioner that the application proposes
When carrying out defrost, referring to FIG. 1, being illustrated so that air conditioner includes four-way valve as an example, certain air conditioner can also be not provided with four
Port valve, using the air conditioner singly heated, when needing defrost, high temperature refrigerant a part that compressor 1 is discharged passes through bypass line
8, control valve 9 is opened at this time, and second throttling device 42 is opened, and controls and the outdoor heat exchanger 30 corresponding second of defrost is needed to manage
Road 32 is opened corresponding first pipeline 31 simultaneously and is closed, high temperature refrigerant enter through the second pipeline need the outdoor heat exchanger of defrost into
Row defrost, another part refrigerant that compressor 1 is discharged enter the room without defrost after four-way valve 1 enters the room 2 heat release of machine
External heat exchanger, that is to say, that need the refrigerant of the outdoor heat exchanger of defrost to be only from the second pipeline, the outdoor unit without defrost
Refrigerant be only from the first pipeline, when carrying out defrost, control each heat exchanger third pipeline 33 open, the 4th pipeline close
It closes, in this way when the refrigerant of refrigerant and the outdoor heat exchanger without defrost in the outdoor heat exchanger for needing defrost is gathered together
Afterwards, although there is pressure difference each other, because the anti-backflow effect of check valve 10, can prevent refrigerant return.Convergence
Refrigerant together returns to compressor 1 through four-way valve 6.
Furthermore it is also important to note that the device that the application proposes can also use refrigeration mode using traditional defrost mode
Defrost is carried out, but air conditioner needs to install four-way valve 6 at this time, to realize refrigeration, when refrigeration mode carries out defrost, each second
Pipeline 32 is turned off, and refrigerant flows into outdoor heat exchanger by four-way valve 6 from compressor 1, only the outdoor heat exchanger of defrost in need
In the open state, the outdoor heat exchanger without defrost is all closed, and then refrigerant is in 30 heat release defrost of outdoor heat exchanger, then passes through
It crosses first throttling device 41 and enters the room machine 2, return to compressor 1 through four-way valve 6.The application can 1 air inlet of compressor with
Heating device 7 is set on the pipeline between four-way valve 6, and heating device 7 for example can be electric heating module, to improve refrigerant
Temperature reduces the load of compressor 1.It can be correspondingly arranged temperature-detecting device 35 on each outdoor heat exchanger 30, for determining room
The tube temperature of external heat exchanger 30, temperature-detecting device 35 for example can be temperature sensing package.
The application also proposes a kind of control method of air conditioner, for controlling any air conditioner, control method in the application
Include:
Detecting step determines the target heat exchanger for needing to carry out defrost；
Specifically, the standard whether determining target heat exchanger needs to carry out defrost can use existing technology, such as can
Think to need when determined according to the tube temperature of outdoor heat exchanger to be, such as detecting the tube temperature of outdoor heat exchanger lower than -10 DEG C into
Row defrost.
Defrost step, control air conditioner are run with heating mode, and are controlled target heat exchanger and carried out defrost；
Specifically, the corresponding first control control device of target heat exchanger opens mesh when target heat exchanger carries out defrost
Corresponding second pipeline of heat exchanger is marked, is carried out so that the refrigerant of exhaust outlet of compressor discharge flows into target heat exchanger through the second pipeline
Defrost, control first control device is so that corresponding second pipeline of outdoor heat exchanger without carrying out defrost is closed.It should be noted that
, when carrying out defrost, can control refrigerant while passing through indoor unit, interior can be added while carrying out defrost in this way
Heat, naturally it is also possible to directly close the outdoor heat exchanger without carrying out defrost, the control method that the application proposes is adopted in defrost
It is run with heating mode, rather than refrigeration mode, therefore indoor temperature will not be reduced, while only changing the outdoor for needing defrost
Hot device carries out defrost, avoids the waste of energy, has realized frost and has just changed, frostless not change.
In some alternative embodiments, correspond to the of same outdoor heat exchanger when first control device is also used to control
When the opening and closing of one pipeline, control method further include: when target heat exchanger carries out defrost, corresponding first control of target heat exchanger
Control device closes the first pipeline for corresponding to same target heat exchanger, so that refrigerant can not flow into target heat exchange through the first pipeline
Device.In the present embodiment, the refrigerant of target heat exchanger is only from the second pipeline, to prevent the cold of low temperature in the first pipeline
Matchmaker, which enters target heat exchanger, influences defrosting effect.When first control device is the first triple valve, that is, controlling the first triple valve makes
The first port and the second pipeline connection of target outdoor heat exchanger are obtained, the first port of target outdoor heat exchanger and the first pipeline are not
Connection
In some alternative embodiments, detecting step, further includes: determine the corresponding defrost mould of each target heat exchanger
Formula；Defrost step, further includes: control target heat exchanger enters corresponding defrost pattern；
Specifically, defrost pattern includes: the first defrost pattern and the second defrost pattern；The cold medium flux of first defrost pattern
Greater than the cold medium flux of the second defrost pattern, and/or, the defrost duration of the first defrost pattern is greater than the defrost of the second defrost pattern
Duration.The frosting degree of different outdoor heat exchangers is different, therefore preferably each outdoor heat exchanger is used according to frosting degree
Different defrost patterns, under the first defrost pattern, the refrigerant for flowing into the heat exchange of target heat exchanger is more, therefore, the mesh more than frosting
Mark heat exchanger preferably uses the first heat exchange mode, and the few target heat exchanger of frosting is using the second heat exchange mode, in order to control target
Coolant quantity in heat exchanger, can for each outdoor heat exchanger pipeline on control valve is set.Determine each outdoor heat exchanger pair
The method for the defrost pattern answered, which can be, takes pictures, and carries out confirmation of taking pictures to the outer surface of each outdoor heat exchanger, or pass through
The tube temperature of outdoor heat exchanger is confirmed.
In some alternative embodiments, detecting step, including；
Monitor the tube temperature of outdoor temperature and each outdoor heat exchanger；
The target heat exchanger and mesh for needing to carry out defrost are determined according to outdoor temperature and the tube temperature of each outdoor heat exchanger
Mark the corresponding defrost pattern of heat exchanger.
Specifically, often determine the need for carrying out defrost in the prior art using the tube temperature of outdoor heat exchanger, it is practical
On whether need defrost should also be as consider outdoor temperature, when outdoor temperature is higher, even if outdoor unit frosting, as outdoor
Temperature is higher and automatic defrosting.
In some alternative embodiments, according to the tube temperature determinationization of outdoor temperature and each outdoor heat exchanger
The target heat exchanger and the corresponding defrost pattern of target heat exchanger of frost, comprising:
When outdoor temperature is greater than outdoor temperature threshold value, if the tube temperature of each outdoor heat exchanger is all larger than defrost operating temperature
Tj, then each outdoor heat exchanger does not need to carry out defrost, illustrates that the temperature of each outdoor heat exchanger is higher at this time, Bu Huiyin
Air conditioner heat-production is run and frosting, while outdoor environment temperature is also higher, and explanation will not be because of natural environmental reason frosting；
And/or when outdoor temperature is greater than outdoor temperature threshold value, the tube temperature of at least one outdoor heat exchanger is little if it exists
In defrost operating temperature Tj, and there are the tube temperatures of at least one outdoor heat exchanger to be greater than defrost operating temperature Tj, it is determined that tube temperature is not
Greater than defrost operating temperature TjOutdoor heat exchanger be first kind target heat exchanger, from tube temperature be greater than defrost operating temperature TjRoom
The smallest outdoor heat exchanger of tube temperature is obtained in external heat exchanger as the second class target heat exchanger, there is the lower outdoor of tube temperature at this time
Heat exchanger, it is therefore desirable to defrost is carried out, with defrost operating temperature TjFor with reference to the defrost pattern for determining that each tube temperature should use；
And/or when outdoor temperature is greater than outdoor temperature threshold value, if the tube temperature of each outdoor heat exchanger is no more than defrost
Operating temperature Tj, it is determined that whole outdoor heat exchangers are first kind target heat exchanger, and each tube temperature is lower at this time, illustrates
Frosting and frosting is serious, so requiring to carry out defrost；
Specifically, first kind target heat exchanger corresponds to the first defrost pattern, corresponding second defrost of the second class target heat exchanger
Mode, when outdoor temperature threshold value can be such as 0 DEG C, defrost operating temperature can be -5 DEG C.
In some alternative embodiments, according to the tube temperature determinationization of outdoor temperature and each outdoor heat exchanger
The target heat exchanger and the corresponding defrost pattern of target heat exchanger of frost, comprising:
When outdoor temperature is not more than outdoor temperature threshold value, if the average value T of the tube temperature of each heat exchangerpNo more than average
It is worth threshold value Td, it is determined that each outdoor heat exchanger is as first kind target heat exchanger, and outdoor temperature is lower at this time, is easy because certainly
Right reason frosting, while the average value of each tube temperature is lower, illustrates that outdoor unit entirety tube temperature is very low, illustrates frosting, need
Defrost；
And/or
When outdoor temperature is not more than outdoor temperature threshold value, the average value T of the tube temperature of each heat exchangerpGreater than average value threshold value
Td, and the absolute value of the tube temperature difference between the highest outdoor heat exchanger of tube temperature and the minimum outdoor heat exchanger of tube temperature is no more than most
It is big to allow tube temperature temperature difference TcWhen, then each heat exchanger does not need to carry out defrost, outdoor although outdoor temperature is lower at this time
The tube temperature of machine entirety is higher, and difference each other is smaller, illustrates that each outdoor unit tube temperature difference is little, and temperature is all higher,
Without carrying out defrost；
And/or
When outdoor temperature is not more than outdoor temperature threshold value, the average value T of the tube temperature of each heat exchangerpGreater than average value threshold value
Td, and the absolute value of the difference of highest tube temperature and minimum tube temperature is greater than maximum allowable tube temperature temperature difference TcWhen, obtain the highest room of tube temperature
Growth rate a of the absolute value of tube temperature difference between external heat exchanger and the minimum outdoor heat exchanger of tube temperature in n minutes first, if a
Less than growth rate threshold value f, then each outdoor heat exchanger does not need to carry out defrost, and outdoor temperature is lower at this time, but outdoor unit is whole
Temperature is higher, although highest tube temperature and the difference of minimum tube temperature are larger, its growth rate is smaller, shows each room in outdoor unit
The temperature difference of external heat exchanger does not have widened trend, and temperature tends towards stability, so without carrying out defrost.
And/or
N=4, when the outdoor temperature is not more than outdoor temperature threshold value, the average value T of the tube temperature of each heat exchangerpIt is greater than
Average value threshold value Td, and the absolute value of the difference of highest tube temperature and minimum tube temperature is greater than maximum allowable tube temperature temperature difference TcWhen, obtain pipe
Increasing of the absolute value of tube temperature difference between the highest outdoor heat exchanger of temperature and the minimum outdoor heat exchanger of tube temperature in n minutes first
Long rate a
If a is not less than growth rate threshold value f, each outdoor heat exchanger is ranked up from low to high according to tube temperature and is changed
Hot device sequence, according to tube temperature, each outdoor heat exchanger is followed successively by the first outdoor heat exchanger, the second outdoor heat exchanger, from low to high
Three outdoor heat exchangers and fourth ventricle external heat exchanger obtain the tube temperature difference between third outdoor heat exchanger and fourth ventricle external heat exchanger
Growth rate b of the absolute value in n minutes first, obtain the tube temperature difference between the second outdoor heat exchanger and third outdoor heat exchanger
Growth rate c of the absolute value in n minutes first, obtain the tube temperature difference between the first outdoor heat exchanger and the second outdoor heat exchanger
Growth rate d of the absolute value in n minutes first；
If b < a/3, c < a/3, and d >=a/3, it is determined that the first outdoor heat exchanger be first kind target heat exchanger, second
Outdoor heat exchanger is the second class target heat exchanger；Alternatively,
If b < a/3 and c >=a/3, it is determined that the first outdoor heat exchanger and the second outdoor heat exchanger are the heat exchange of first kind target
Device, the second outdoor heat exchanger are the second class target heat exchanger
If b >=a/3, it is determined that the first outdoor heat exchanger, the second outdoor heat exchanger and third outdoor heat exchanger are the first kind
Target heat exchanger, fourth ventricle external heat exchanger are the second class target heat exchanger,
Wherein, corresponding first defrost pattern of the first kind target heat exchanger, the second class target heat exchanger corresponding the
Two defrost patterns.
In order to better illustrate the scheme of the application, another preferred embodiment set forth below is adopted in the present embodiment
It include 4 outdoor heat exchangers by outdoor unit with the air conditioner structure in Fig. 1, each outdoor heat exchanger is considered as a module, leads to
The tube temperature of the temperature-sensing tank test outdoor heat exchanger on outdoor heat exchanger 30 is crossed, the first defrost pattern is normalization frost, the second defrost
Mode is slight defrost.
As described in Figure 3, air-conditioner system issues defrost instruction, and control valve 9 is opened；Electronics as second throttling device 42
Expansion valve is adjusted to corresponding aperture, for needing the target heat exchanger of defrost, controls the one or three as first control device 51
Port valve, so that the refrigerant flowed into target heat exchanger comes from the second pipeline 32, the refrigerant of the first pipeline 31 can not be through the first threeway
Valve enters target heat exchanger, and air conditioner is run with heating mode, and a part of refrigerant flows after indoor unit 2 and first throttling device 41
Enter to be not necessarily to the outdoor heat exchanger 30 of defrost, then the refrigerant of each outdoor heat exchanger 30 converges and returns to compressor 1.
When determining target heat exchanger and corresponding defrost pattern, the temperature sensing package of each module detects each module outdoor heat exchanger
Copper pipe surface temperature, real-time monitoring temperature is followed successively by T1, T2, T3, T4 from low to high
Outdoor temperature be greater than outdoor temperature threshold value when, will monitoring tube temperature T1, T2, T3, T4 successively with defrost operating temperature
TjComparison, if T1≤TjInvalid, then each module does not enter defrost；If so, then continue to determine T2 temperature, if T2
≤TjIt is invalid, the normal defrost of T1 respective modules, the slight defrost of T2 respective modules；If so, then continue to sentence T3 temperature
It is fixed, if T3≤TjIt is invalid, the successively normal defrost of T1, T2 respective modules, the slight defrost of T3 respective modules；If so, then continue
T4 temperature is determined, if T4≤TjInvalid, T1, T2, T3 respective modules successively normal defrost, T4 respective modules are slightly changed
Frost；If so, then T1, T2, T3, T4 respective modules successively carry out normal defrost
Outdoor temperature be less than or equal to outdoor temperature threshold value when, each module tubes warming thermometer bulb real-time monitoring outdoor unit tube temperature by
It is low to high to be followed successively by T1, T2, T3, T4,
Calculate each intermodule monitoring tube temperature Wen Cha ∣ Δ T14 ∣, ∣ Δ T12 ∣, ∣ Δ T23 ∣, ∣ Δ T34 ∣ and each module monitors
The mean temperature T of tube temperaturep；
By TpWith average value threshold value TdComparison, if Tp≤TdIt sets up, then T1, T2, T3, T4 respective modules successively carry out just
Normalizing frost；
If not, then continue ∣ Δ T14 ∣ and the maximum allowable tube temperature temperature difference T of each intermodulecComparison；
Ruo ∣ Δ T14 ∣≤TcIt sets up, then each module is without low temperature defrost；
If not, n minutes rate of rise a determine before Ze Dui ∣ Δ T14 ∣；If a < f is set up, each module is equal
Without defrost；If not, then n minutes rate of rise b before Ji Suan ∣ Δ T34 ∣；N minutes rates of rise before Ji Suan ∣ Δ T23 ∣
c；N minutes rate of rise d before Ji Suan ∣ Δ T12 ∣；
The calculated value of b, c, d and a are compared and analyzed, if 1. meeting b < a/3 simultaneously；C < a/3；D >=a/3, then T1
The normal defrost of respective modules, the slight defrost of T2 respective modules, if 2. meeting b < a/3 simultaneously；C >=a/3, then T1, T2 respective modules
Successively normal defrost, the slight defrost of T3 respective modules, if 3. meeting b >=a/3, the successively normal defrost of T1, T2, T3 respective modules,
The slight defrost of T4 respective modules.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (11)
1. a kind of air conditioner, which is characterized in that
Compressor (1), indoor unit (2), outdoor unit (3) and first throttling device (41) including connecting into air conditioner loop, it is described
First throttling device (41) setting is indoors between machine (2) and outdoor unit (3)；
The outdoor unit (3) includes the outdoor heat exchanger (30) of N number of parallel connection, and any outdoor heat exchanger (30) is correspondingly arranged on one
First pipeline (31), second pipeline (32) and a first control device (51), N are not less than 2；
The first end of first pipeline (31) is connected with the first port of corresponding outdoor heat exchanger (30), first pipeline
(31) second end is connected with the first throttling device (41)；
The first end of second pipeline (32) is connected with the first port of corresponding outdoor heat exchanger (30), second pipeline
(32) second end is connected with the exhaust outlet (11) of the compressor (1)；
The first control device (51), for controlling opening for the second pipeline (32) corresponding to same outdoor heat exchanger (30)
It closes.
2. air conditioner according to claim 1 characterized by comprising
Bypass line (8), the first end of bypass line (8) are connected with the exhaust outlet (11) of compressor (1), and each described second
The second end of pipeline (32) is connected with the second end of the bypass line (8), and second pipeline (32) passes through the bypass
Pipeline (8) is connected to the exhaust outlet (11) of the compressor (1)；
It is provided with second throttling device (42) on the bypass line (8), and/or, control is provided on the bypass line (8)
Valve (9).
3. air conditioner according to claim 1 or 2, which is characterized in that
The first control device (51) is also used to control opening for the first pipeline (31) for corresponding to same outdoor heat exchanger (30)
It closes；
And/or the first control device (51) is also used to control the opening and closing of corresponding outdoor heat exchanger (30).
4. air conditioner according to claim 1-3, which is characterized in that
The first control device (51) is the first triple valve；
First connector of first triple valve is connected with the first port of corresponding outdoor heat exchanger (30)；
Second connector of first triple valve and the first of the first pipeline (31) for corresponding to same outdoor heat exchanger (30)
End is connected；
The third connector of first triple valve and the first of the second pipeline (32) for corresponding to same outdoor heat exchanger (30)
End is connected.
5. air conditioner according to claim 1-4, which is characterized in that further include:
Any outdoor heat exchanger (30) is correspondingly arranged on a third pipeline (33), the 4th pipeline (34) and one second control
Device (52) processed；
The first end of the third pipeline (33) is connected with the second port of the outdoor heat exchanger (30), the third pipeline
(33) it is provided on check valve (10), refrigerant can only flow to second end from the first end of third pipeline (33)；
4th pipeline (34) is arranged in parallel with the third pipeline (33), the first end of the 4th pipeline (34) with it is described
The second port of outdoor heat exchanger (30) is connected；
The second control device (52) contacts setting with the third pipeline (33) and the 4th pipeline (34), for control pair
It should be in the opening and closing of the third pipeline (33) and the 4th pipeline (34) of same outdoor heat exchanger (30).
6. a kind of control method of air conditioner, which is characterized in that described for controlling any air conditioner in such as claim 1-5
Control method includes:
Detecting step determines the target heat exchanger for needing to carry out defrost；
Defrost step, control air conditioner are run with heating mode, and are controlled the target heat exchanger and carried out defrost；
Wherein, when the target heat exchanger carries out defrost, the corresponding first control control device of target heat exchanger opens target
Corresponding second pipeline of heat exchanger so that the exhaust outlet of compressor discharge refrigerant through the second pipeline flow into target heat exchanger into
Row defrost, control first control device is so that corresponding second pipeline of outdoor heat exchanger without carrying out defrost is closed.
7. the control method of air conditioner according to claim 6, which is characterized in that when first control device is also used to control
When opening and closing corresponding to the first pipeline of same outdoor heat exchanger, the control method further include:
When the target heat exchanger carries out defrost, the corresponding first control control device of target heat exchanger is closed corresponding to same
First pipeline of target heat exchanger, so that refrigerant can not flow into target heat exchanger through the first pipeline.
8. the control method of air conditioner according to claim 6 or 7, which is characterized in that it is characterized in that,
The detecting step, further includes: determine the corresponding defrost pattern of each target heat exchanger；
The defrost step, further includes: control the target heat exchanger into corresponding defrost pattern；
Wherein, the defrost pattern includes: the first defrost pattern and the second defrost pattern；
The cold medium flux of first defrost pattern is greater than the cold medium flux of the second defrost pattern, and/or, the first defrost mould
The defrost duration of formula is greater than the defrost duration of second defrost pattern.
9. the control method of air conditioner according to claim 8, which is characterized in that the detecting step, including；
Monitor the tube temperature of outdoor temperature and each outdoor heat exchanger；
The target heat exchanger and mesh for needing to carry out defrost are determined according to the outdoor temperature and the tube temperature of each outdoor heat exchanger
Mark the corresponding defrost pattern of heat exchanger.
10. the control method of air conditioner according to claim 9, which is characterized in that according to the outdoor temperature and each
The tube temperature of outdoor heat exchanger determines the target heat exchanger and the corresponding defrost pattern of target heat exchanger for needing to carry out defrost, packet
It includes:
When the outdoor temperature is greater than outdoor temperature threshold value, if the tube temperature of each outdoor heat exchanger is all larger than defrost operating temperature
Tj, then each outdoor heat exchanger does not need to carry out defrost；
And/or when the outdoor temperature is greater than outdoor temperature threshold value, the tube temperature of at least one outdoor heat exchanger is little if it exists
In defrost operating temperature Tj, and there are the tube temperatures of at least one outdoor heat exchanger to be greater than defrost operating temperature Tj, it is determined that tube temperature is not
Greater than defrost operating temperature TjOutdoor heat exchanger be first kind target heat exchanger, from tube temperature be greater than defrost operating temperature TjRoom
The smallest outdoor heat exchanger of tube temperature is obtained in external heat exchanger as the second class target heat exchanger；
And/or when the outdoor temperature is greater than outdoor temperature threshold value, if the tube temperature of each outdoor heat exchanger is no more than defrost
Operating temperature Tj, it is determined that whole outdoor heat exchangers are first kind target heat exchanger；
Wherein, corresponding first defrost pattern of the first kind target heat exchanger, the second class target heat exchanger corresponding second are changed
White mode.
11. the control method of air conditioner according to claim 9 or 10, which is characterized in that according to the outdoor temperature and
The tube temperature of each outdoor heat exchanger determines the target heat exchanger and the corresponding defrost pattern of target heat exchanger for needing to carry out defrost,
Include:
When the outdoor temperature is not more than outdoor temperature threshold value, if the average value T of the tube temperature of each heat exchangerpNo more than average
It is worth threshold value Td, it is determined that each outdoor heat exchanger is as first kind target heat exchanger；
And/or
When the outdoor temperature is not more than outdoor temperature threshold value, the average value T of the tube temperature of each heat exchangerpGreater than average value threshold value
Td, and the absolute value of the tube temperature difference between the highest outdoor heat exchanger of tube temperature and the minimum outdoor heat exchanger of tube temperature is no more than most
It is big to allow tube temperature temperature difference TcWhen, then each heat exchanger does not need to carry out defrost；
And/or
When the outdoor temperature is not more than outdoor temperature threshold value, the average value T of the tube temperature of each heat exchangerpGreater than average value threshold value
Td, and the absolute value of the difference of highest tube temperature and minimum tube temperature is greater than maximum allowable tube temperature temperature difference TcWhen, obtain the highest room of tube temperature
Growth rate a of the absolute value of tube temperature difference between external heat exchanger and the minimum outdoor heat exchanger of tube temperature in n minutes first, if a
Less than growth rate threshold value f, then each outdoor heat exchanger does not need to carry out defrost；
And/or
N=4, when the outdoor temperature is not more than outdoor temperature threshold value, the average value T of the tube temperature of each heat exchangerpGreater than average value
Threshold value Td, and the absolute value of the difference of highest tube temperature and minimum tube temperature is greater than maximum allowable tube temperature temperature difference TcWhen, obtain tube temperature highest
Outdoor heat exchanger and the minimum outdoor heat exchanger of tube temperature between tube temperature difference growth rate a of the absolute value in n minutes first；
If a is not less than growth rate threshold value f, each outdoor heat exchanger is ranked up to obtain heat exchanger according to tube temperature from low to high
Sequence, according to tube temperature, each outdoor heat exchanger is followed successively by the first outdoor heat exchanger, the second outdoor heat exchanger, third room from low to high
External heat exchanger and fourth ventricle external heat exchanger obtain the exhausted of the tube temperature difference between third outdoor heat exchanger and fourth ventricle external heat exchanger
To growth rate b of the value in n minute first, tube temperature difference between the second outdoor heat exchanger of acquisition and third outdoor heat exchanger it is exhausted
To growth rate c of the value in n minute first, tube temperature difference between the first outdoor heat exchanger of acquisition and the second outdoor heat exchanger it is exhausted
To growth rate d of the value in n minutes first；
If b < a/3, c < a/3, and d >=a/3, it is determined that the first outdoor heat exchanger is first kind target heat exchanger, outside second Room
Heat exchanger is the second class target heat exchanger；Alternatively,
If b < a/3 and c >=a/3, it is determined that the first outdoor heat exchanger and the second outdoor heat exchanger are first kind target heat exchanger,
Second outdoor heat exchanger is the second class target heat exchanger；Alternatively,
If b >=a/3, it is determined that the first outdoor heat exchanger, the second outdoor heat exchanger and third outdoor heat exchanger are first kind target
Heat exchanger, fourth ventricle external heat exchanger are the second class target heat exchanger,
Wherein, corresponding first defrost pattern of the first kind target heat exchanger, the second class target heat exchanger corresponding second are changed
White mode.
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| CN114704940A (en) * | 2022-03-28 | 2022-07-05 | 珠海格力电器股份有限公司 | Adjusting method and adjusting device of heat exchanger, heat exchanger and air conditioner |
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| CN110207278B (en) | 2020-06-02 |
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