CN104764111B - Multi-connected air conditioning system and its defrosting control method - Google Patents
Multi-connected air conditioning system and its defrosting control method Download PDFInfo
- Publication number
- CN104764111B CN104764111B CN201410004315.3A CN201410004315A CN104764111B CN 104764111 B CN104764111 B CN 104764111B CN 201410004315 A CN201410004315 A CN 201410004315A CN 104764111 B CN104764111 B CN 104764111B
- Authority
- CN
- China
- Prior art keywords
- control valve
- outdoor unit
- unit modules
- valve
- conditioning system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
-
- 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
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0252—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units with bypasses
- F25B2313/02522—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units with bypasses during defrosting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of multi-connected air conditioning system and its defrosting control method.Multi-connected air conditioning system includes：Indoor set module and multiple outdoor unit modules in parallel, each outdoor unit modules include：Compressor, four-way valve, outdoor heat exchanger, first throttle element, the first control valve, the second control valve, the 3rd control valve, the 4th control valve and the 5th control valve, the first control valve are connected between first throttle element and indoor set module.Second control valve is connected with first throttle element, and the second control valve is connected to the first common line.3rd control valve is connected with the 4th valve port, and the 3rd control valve is connected to the second common line, and the second common line is connected with indoor set module.4th control valve is connected with the second valve port and the first common line respectively.5th control valve is connected with the first valve port and the second common line.Multi-connected air conditioning system according to embodiments of the present invention, the continuous heating during defrosting is realized, indoor set module is not shut down, so as to improve comfortableness.
Description
Technical field
The present invention relates to electrical equipment manufacturing technology field, more particularly, to a kind of multi-connected air conditioning system and its defrosting controlling party
Method.
Background technology
At present either parallel module multi-connected air conditioning system either free-standing multi-connected air conditioning system during defrosting,
All whole system refrigeration mode must be converted to from heating mode to remove totally the frost on outdoor heat exchanger to realize, and
During defrosting, indoor set must shut off indoor fan to prevent defrosting process from indoor heat is taken away, and indoor heat exchanger can go out
Existing frosting situation, produces abnormal sound because rapidly expanding with heat and contract with cold sometimes, and after exiting defrosting, system has just switched to normally heat
Need to carry out anti-cold air control system during pattern, when heat exchanger coils temperature rises and meets to require in waiting room, indoor fan ability
Open.During whole refrigeration defrosting, shutdown phenomenon occurs in indoor set, and continues the time of a few minutes to more than ten minutes,
Comfort is relatively low, and easily causes user to misread.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.
Therefore, it is an object of the present invention to propose a kind of multi-connected air conditioning system, realize continuous during defrosting
Heating, indoor set module are not shut down.
It is another object of the present invention to propose a kind of defrosting control method of above-mentioned multi-connected air conditioning system.
Multi-connected air conditioning system according to embodiments of the present invention, including：Indoor set module, the indoor set module are included extremely
A few indoor heat exchanger；Multiple outdoor unit modules in parallel, each outdoor unit modules include：Compressor, the compression
Machine has exhaust outlet and air entry；Four-way valve, the four-way valve include first to fourth valve port, first valve port and the row
Gas port is connected, and second valve port is connected with the air entry；Outdoor heat exchanger, one end of the outdoor heat exchanger and described the
Three valve ports are connected；First throttle element, the first throttle element are connected with the other end of the outdoor heat exchanger；First control
Valve, first control valve are connected between the first throttle element and the indoor set module；Second control valve, described
One end of two control valves is connected to the pipeline between the first throttle element and first control valve, second control valve
The other end be connected to the first common line；3rd control valve, one end of the 3rd control valve are connected with the 4th valve port,
The other end of 3rd control valve is connected to the second common line, second common line and the indoor set module phase
Even；4th control valve, one end of the 4th control valve are connected with the second valve port of the four-way valve, the 4th control valve
The first common line is connected described in the other end；5th control valve, one end of the 5th control valve and the first of the four-way valve
Valve port is connected, and the other end of the 5th control valve is connected with second common line；, wherein it is desired to the multiple outdoor
When one of them outdoor unit modules for being in heating mode in machine module defrost, the institute in one of outdoor unit modules
State the second control valve and the 5th control valve is opened, the institute in remaining outdoor unit modules in the multiple outdoor unit modules
The first control valve, the 3rd control valve and the 4th control valve is stated to open.
Multi-connected air conditioning system according to embodiments of the present invention, when one of outdoor unit modules are defrosted, remaining
Outdoor unit modules still be in heating mode, realize multi-connected air conditioning system continuous heating during defrosting, indoor set mould
Block is not shut down, so as to improve the comfortableness of multi-connected air conditioning system.
In addition, following additional technical feature is also had according to the multi-connected air conditioning system of the present invention：
According to some embodiments of the present invention, each outdoor unit modules also include the first check valve, first check valve
It is connected between first valve port and the exhaust outlet with from the exhaust outlet to unidirectional on the direction of first valve port
Conducting.So as to improve the reliability of multi-connected air conditioning system.
In some embodiments of the invention, each outdoor unit modules also include oil eliminator, the oil eliminator series connection
Between the exhaust outlet and first valve port, the oil export of the oil eliminator is connected with the air entry.So as to carry
The reliability of high compressor.
Further, each outdoor unit modules also include the second restricting element, and second restricting element is connected on described
Between oil export and the air entry.
In further embodiment of the present invention, each outdoor unit modules also include gas-liquid separator, the gas-liquid separation
Utensil has entrance and gas vent, and the gas vent is connected with the air entry, the entrance respectively with second valve port
It is connected with the 4th control valve.
Further, each outdoor unit modules also include the first stop valve, and first stop valve is connected on described first
Between control valve and the indoor set module.
Further, each outdoor unit modules also include the second stop valve, and second stop valve is connected on described second
Between control valve and first common line.
Further, each outdoor unit modules also include the 3rd stop valve, and the 3rd stop valve is connected on the described 3rd
Between control valve and second common line, one end of the 5th control valve is connected to the 3rd control valve and described
Between three stop valves.
Further, each outdoor unit modules also include the 4th stop valve, and the 4th stop valve is connected on the described 4th
Between control valve and first common line.
Specifically, first control valve, second control valve, the 3rd control valve, the 4th control valve and
5th control valve is respectively magnetic valve.
The defrosting control method of multi-connected air conditioning system according to embodiments of the present invention, the multi-connected air conditioning system are root
According to the multi-connected air conditioning system of the above embodiment of the present invention, the defrosting control method comprises the following steps：S1：When the multiple
When an outdoor unit modules in heating mode send defrosting instruction in outdoor unit modules, the multiple outdoor unit modules are judged
In remaining outdoor unit modules it is whether in running order；S2：When remaining described outdoor unit modules are in heating mode, keep
Heating mode is constant, and the four-way valves of one outdoor unit modules is switched to refrigeration mode, in one outdoor unit modules
First control valve is closed, the 3rd control valve is closed, the 4th control valve is closed, second control valve is opened,
5th control valve is opened and the compressor shutdown；It is described when remaining described outdoor unit modules are in off-duty state
Remaining outdoor unit modules enters heating mode, and first control of each outdoor unit modules in remaining described outdoor unit modules
Valve, the 3rd control valve and the 4th control valve processed are opened, and the four-way valve of one outdoor unit modules is switched to refrigeration
Pattern, first control valve in one outdoor unit modules is closed, the 3rd control valve is closed, the 4th control
Valve is closed, second control valve is opened, the 5th control valve is opened and the compressor shutdown.
The defrosting control method of multi-connected air conditioning system according to embodiments of the present invention, when one of outdoor unit modules enter
During row defrosting, remaining outdoor unit modules is still in heating mode, and it is continuous during defrosting to realize multi-connected air conditioning system
Heating, indoor set module is not shut down, so as to improve the comfortableness of multi-connected air conditioning system.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the schematic diagram according to the multi-connected air conditioning system of the embodiment of the present invention；
Fig. 2 is the schematic diagram of the outdoor unit modules in the multi-connected air conditioning system shown in Fig. 1；
Fig. 3 is the flow chart according to the defrosting control method of the multi-connected air conditioning system of the embodiment of the present invention.
Reference：
Multi-connected air conditioning system 100, indoor set module 1, indoor heat exchanger 10, outdoor unit modules 2, the first outdoor unit modules
2a, the second outdoor unit modules 2b, the 3rd outdoor unit modules 2c, compressor 20, exhaust outlet a, air entry b, four-way valve 21, the first valve
Mouthful D, the second valve port S, the 3rd valve port C, the 4th valve port E, outdoor heat exchanger 22, first throttle element 23, the first control valve 24, the
Two control valves 25, the 3rd control valve 26, the 4th control valve 27, the 5th control valve 28, the first check valve 29, oil eliminator 30, enter
Mouthful f, oil export h, gas outlet i, the second restricting element 31, gas-liquid separator 32, entrance g, gas vent w, the first stop valve 33,
Second stop valve 34, the 3rd stop valve 35, the 4th stop valve 36, first interface 37, second interface 38, the 3rd interface the 39, the 4th
Interface 40, the second check valve 41, the first common line 3, the second common line 4
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", " top ",
The orientation or position relationship of the instruction such as " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, merely to just
In the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used
In description purpose, and it is not intended that instruction or hint relative importance or the implicit number for indicating indicated technical characteristic
Amount.Thus, " first " is defined, one or more this feature can be expressed or be implicitly included to the feature of " second ".
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Multi-connected air conditioning system 100 according to embodiments of the present invention, the multi-connected air conditioner are described below with reference to Fig. 1 and Fig. 2
System 100 has heating mode and refrigeration mode.It should be noted that in following multi-connected air conditioning systems 100, only describe
The multi-connected air conditioning system 100 includes the situation of three outdoor unit modules 2, it should be understood that, the invention is not restricted to
This, the technical staff of common art appreciates that, is reading teaching disclosed herein of the invention, can be by the reality
Applying example includes the situation of outdoor unit modules 2 of two and more than three applied to multi-connected air conditioning system 100, and this also falls into this
Within the protection domain of invention, multi-connected air conditioning system 100 is described in detail below.
As depicted in figs. 1 and 2, multi-connected air conditioning system 100 according to embodiments of the present invention includes：The He of indoor set module 1
Three outdoor unit modules 2 in parallel, wherein, indoor set module 1 includes at least one indoor heat exchanger 10, it is necessary to illustrate,
The element also including indoor fan etc. of indoor set module 1.Three outdoor unit modules 2 are respectively the first outdoor unit modules 2a, second Room
Outer machine module 2b and the 3rd outdoor unit modules 2c, the first outdoor unit modules 2a, the second outdoor unit modules 2b and the 3rd outdoor unit mould
Block 2c is connected in parallel to indoor set module 1.
Specifically, each outdoor unit modules 2 include：Compressor 20, four-way valve 21, outdoor heat exchanger 22, first throttle member
Part 23, the first control valve 24, the second control valve 25, the 3rd control valve 26, the 4th control valve 27 and the 5th control valve 28, wherein,
Compressor 20 has exhaust outlet a and air entry b, it is necessary to which explanation, structure and operation principle of compressor 20 etc. are ability
The prior art in domain, is just not described in detail here.Four-way valve 21 includes the first valve port D, the second valve port S, the 3rd valve port C and the 4th
Valve port E, the first valve port D are connected with exhaust outlet a, and air entry b and the second valve port S-phase connect, when outdoor unit modules 2 are in heating state
When, four-way valve 21 is in heating mode, and now the first valve port D and the 4th valve port E is turned on and the second valve port S and the 3rd valve port C are led
Logical, when outdoor unit modules 2 are in refrigerating state, four-way valve 21 is in refrigeration mode, now the first valve port D and the 3rd valve port C
Conducting and the second valve port S and the 4th valve port E conducting.
One end of outdoor heat exchanger 22 is connected with the 3rd valve port C.First throttle element 23 is another with outdoor heat exchanger 22
End is connected, and alternatively, first throttle element 23 is capillary.First control valve 24 is connected to first throttle element 23 and indoor set
Between module 1.One end of second control valve 25 is connected to the pipeline between the control valve 24 of first throttle element 23 and first, the
The other end of two control valves 25 is connected to the first common line 3, that is to say, that the second control valve 25 of multiple outdoor unit modules 2
It is respectively connecting to the first common line 3.
One end of 3rd control valve 26 is connected with the 4th valve port E, and the other end of each 3rd control valve 26 is connected to second
Common line 4, the second common line 4 are connected with indoor set module 1, that is to say, that the 3rd control valve of each outdoor unit modules 2
26 are connected by the second common line 4 with indoor set module 1.
One end of 4th control valve 27 is connected with the second valve port S of four-way valve 21, the other end of the 4th control valve 27 and
One common line 3 is connected.One end of 5th control valve 28 is connected with the first valve port D, and the other end of the 5th control valve 28 and
Two common lines 4 are connected.Wherein, the first control valve 24, the second control valve 25, the 3rd control valve 26, the 4th control valve 27 and
Five control valves 28 have opening and closed mode respectively.Alternatively, the first control valve 24, the control of the second control valve the 25, the 3rd
Valve 26, the 4th control valve 27 and the 5th control valve 28 processed are respectively magnetic valve.
When needing to be in one of them in three outdoor unit modules 2 defrosting of outdoor unit modules 2 of heating mode, wherein
One outdoor unit modules 2（Outdoor unit modules 2 i.e. to be defrosted）In the second control valve 25 and the 5th control valve 28 open, wherein
The first control valve 24, the 3rd control valve 26 and the 4th control valve 27 of one outdoor unit modules 2 are closed.Multiple outdoor unit modules 2
In remaining outdoor unit modules 2 in the first control valve 24, the 3rd control valve 26 and the 4th control valve 27 open, multiple outdoors
The second control valve 25 in remaining outdoor unit modules 2 and the 5th control valve 28 in machine module 2 are closed.
If all outdoor unit modules 2 of multi-connected air conditioning system 100 open heating mode and in normal heating states
When lower, i.e. the first outdoor unit modules 2a, the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c are in normal heating state,
Now the first control valve the 24, the 3rd in the first outdoor unit modules 2a, the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c
The control valve 27 of control valve 26 and the 4th is in opening, and the second control valve 25 and the 5th control valve 28 are closed, and
The first valve port D and the 4th valve port the E conducting and the second valve port S and the 3rd valve port C conductings of each four-way valve 21.
When the first outdoor unit modules 2a requirements enter refrigeration mode, the first outdoor unit modules 2a compressor 20 reduces
Output, close the first outdoor unit modules 2a the first control valve 24, the 3rd control valve 26 and the 4th control valve 27, the first outdoor unit
The module 2a power down of four-way valve 21 switches to refrigeration mode, and now the first outdoor unit modules 2a four-way valve 21 is the first valve port D
With the 3rd valve port C conductings and the second valve port S and the 4th valve port E conductings, then, the first outdoor unit modules 2a compressor 20 stops
Machine, then open the first outdoor unit modules 2a the second control valve 25 and the 5th control valve 28.Second outdoor unit modules 2b and
Three outdoor unit modules 2c keep heating mode constant.
Frequency increase output can be improved after the first outdoor unit modules 2a shutdown, indoor set module 1 is keeping original pattern just
Often operation.Now as illustrated by the arrows in fig. 1, from the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c compressor 20
The high pressure gaseous refrigerant of exhaust outlet a discharges passes sequentially through the control valve 26 of four-way valve 21 and the 3rd and is drained into the second common line
In 4, refrigerant in the second common line 4 is partly into indoor set module 1, and a part of refrigerant enters indoor set
Condensation radiating is carried out in the indoor heat exchanger 10 of module 1, the refrigerant after condensation is radiated is discharged and passed through from indoor set module 1
Second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the first control valve 24 and first throttle element 23 is drained into accordingly
In outdoor heat exchanger 22, the refrigerant discharged from outdoor heat exchanger 22 is expelled back into compressor 20 by four-way valve 21 and air entry b.
Another part of high pressure gaseous refrigerant in second common line 4 passes through the 5th of the first outdoor unit modules 2a
The outdoor unit modules 2a of control valve 28 and first four-way valve 21 is drained into the first outdoor unit modules 2a outdoor heat exchanger 22, high
The condensation in the first outdoor unit modules 2a outdoor heat exchanger 22 of warm high-pressure gaseous refrigerant is radiated to be carried out to outdoor heat exchanger 22
Defrosting, becomes the liquid refrigerants of low-temp low-pressure after defrosting, the liquid refrigerants throttled by first throttle element 23 after again by the
One outdoor unit modules 2a the second control valve 25 is discharged in the first common line 3, the liquid refrigerants difference in the first common line 3
It is expelled back into by the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the 4th control valve 27 in corresponding compressor 20.From
And complete the defrosting process to the first outdoor unit modules 2a.After defrosting terminates, the four-way valve 21 on the first outdoor unit modules 2a is cut
Heating mode is changed to, closes the first outdoor unit modules 2a the second control valve 25 and the 5th control valve 28, while open the first Room
Outer machine module 2a the first control valve 24, the 3rd control valve 26 and the 4th control valve 27, the first outdoor unit modules 2a are reopened
Heating mode.
It should be noted that when the second outdoor unit modules 2b or the 3rd outdoor unit modules 2c requires to enter defrosting, it is multi-joint
The defrosting principle that the defrosting principle of formula air-conditioning system 100 enters with the first outdoor unit modules 2a when defrosting is identical, just unknown here
Thin description.
When simultaneously the first outdoor unit modules 2a, the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c send defrosting request
When, carried out by the sequence of addresses of outdoor unit modules 2, carry out the defrosting of single outdoor unit modules 2 in turn.When single outdoor unit modules 2
When the defrosting that other outdoor unit modules 2 are received during defrosting is asked, it is necessary to wait the outdoor unit modules 2 to defrost to remove
Carried out again by the sequence of addresses of outdoor unit modules 2 after complete frost, carry out single outdoor unit modules 2 in turn and defrost.
If multi-connected air conditioning system 100 only has an outdoor unit modules 2 to open heating mode, such as when the first outdoor unit
Module 2a opens heating mode, and the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c be not turned on heating mode, and now the
Two outdoor unit modules 2b and the 3rd outdoor unit modules 2c the first control valve 24, the second control valve 25, the 3rd control valve 26 and
Five control valves 28 are closed, and the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the 4th control valve 27, which are in, beats
Open state.When the first outdoor unit modules 2a requirements are defrosted, the first outdoor unit modules 2a compressor 20 reduces output, will
Total output when originally the first outdoor unit modules 2a is in heating mode is averaged to the second outdoor unit modules 2b and the 3rd outdoor unit
On module 2c, and the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c are separately turned on heating mode, when the second outdoor unit mould
After block 2b and the 3rd outdoor unit modules 2c are stable, the first outdoor unit modules 2a closes the first control valve 24, the 3rd control valve
26 and the 4th control valve 27, the first outdoor unit modules 2a power down of four-way valve 21 switch to refrigeration mode, the first outdoor unit modules
2a compressor 20 is shut down, and then opens the first outdoor unit modules 2a the second control valve 25 and the 5th control valve 28, indoor set
Module 1 keeps original pattern normal operation.
Now as illustrated by the arrows in fig. 1, from the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c compressor 20
The high pressure gaseous refrigerants of exhaust outlet a discharges pass sequentially through the control valve 26 of four-way valve 21 and the 3rd and be drained into the second public pipe
In road 4, refrigerant in the second common line 4 is partly into indoor set module 1, and a part of refrigerant enters interior
Condensation radiating is carried out in the indoor heat exchanger 10 of machine module 1, the refrigerant after condensation is radiated is discharged and led to from indoor set module 1
The first control valve 24 and first throttle element 23 for crossing the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c are drained into accordingly
Outdoor heat exchanger 22 in, from outdoor heat exchanger 22 discharge refrigerant compressor 20 is expelled back into by four-way valve 21 and air entry b
It is interior.
Another part of high pressure gaseous refrigerant in second common line 4 passes through the 5th of the first outdoor unit modules 2a
The outdoor unit modules 2a of control valve 28 and first four-way valve 21 is drained into the first outdoor unit modules 2a outdoor heat exchanger 22, high
The condensation in the first outdoor unit modules 2a outdoor heat exchanger 22 of warm high-pressure gaseous refrigerant is radiated to be carried out to outdoor heat exchanger 22
Defrosting, becomes the liquid refrigerants of low-temp low-pressure after defrosting, the liquid refrigerants throttled by first throttle element 23 after again by the
One outdoor unit modules 2a the second control valve 25 is discharged in the first common line 3, the liquid refrigerants difference in the first common line 3
It is expelled back into by the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the 4th control valve 27 in compressor 20.So as to complete
To the first outdoor unit modules 2a defrosting process.After defrosting terminates, the first outdoor unit modules 2a reopens heating mode, and second
Outdoor unit modules 2b and the 3rd outdoor unit modules 2c is shut down.
Multi-connected air conditioning system 100 according to embodiments of the present invention, when one of outdoor unit modules 2 are defrosted,
Remaining outdoor unit modules 2 is still in heating mode, realizes the continuous heating during defrosting of multi-connected air conditioning system 100,
Indoor set module 1 is not shut down, so as to improve the comfortableness of multi-connected air conditioning system 100.
In some embodiments of the invention, as depicted in figs. 1 and 2, each outdoor unit modules 2 also include the first check valve
29, the first check valve 29 is connected between the first valve port D and exhaust outlet a with from exhaust outlet a to single on the first valve port D direction
To conducting.So as to prevent the refrigerant for being discharged to the first valve port D by the 5th control valve 28 from entering in exhaust outlet a, ensure that
The reliability of multi-connected air conditioning system 100.
As shown in 1 and Fig. 2, in further embodiment of the present invention, each outdoor unit modules 2 also include oil eliminator
30, oil eliminator 30 is connected between exhaust outlet a and the first valve port D, and the oil export h of oil eliminator 30 is connected with air entry b, more
Further, each outdoor unit modules 2 also include the second restricting element 31, and the second restricting element 31 is connected on oil export h and suction
Between gas port b.Specifically, oil eliminator 30 is connected with the gentle outlet i of import f, oil export h, import f with exhaust outlet a, and gas goes out
Mouth i is connected with the first valve port D, and oil export h is connected with the second restricting element 31, and the second restricting element 31 is connected with air entry b, from
The refrigerant of the oil gas state of exhaust outlet a discharges, which enters, carries out Oil-gas Separation in oil eliminator 30, the gaseous coolant after separation leads to
Cross gas outlet i to enter in the first valve port D, the refrigeration oil after separation is expelled back into compressor after throttling by the second restricting element 31
In 20, so as to ensure the recirculating oil quantity of compressor 20, extend the service life of compressor 20.Alternatively, the second restricting element 31 is
Capillary.
In the example of fig. 1 and 2, the first check valve 29 be connected on oil eliminator 30 gas outlet i and the first valve port D it
Between, and as shown in figure 1, each outdoor unit modules 2 also include the second check valve 41, the second check valve 41 be connected on exhaust outlet a with
Between the import f of oil eliminator 30, so as to be further ensured that the reliability of multi-connected air conditioning system 100.
As depicted in figs. 1 and 2, gas-liquid separator is also included according to some embodiments of the present invention, each outdoor unit modules 2
32, there is gas-liquid separator 32 entrance g and gas vent w, gas vent w to be connected with air entry b, entrance g respectively with the second valve
Mouth S and the 4th control valve 27 are connected.Now gas-liquid separator is entered from the second valve port S and the 4th control valve 27 refrigerant discharged
Gas-liquid separation is carried out in 32, the gaseous coolant isolated is expelled back into compressor 20 by gas vent w and air entry b, so as to
Ensure that only having gaseous coolant to return in compressor 20 is compressed circulation.
According to some embodiments of the present invention, as depicted in figs. 1 and 2, each outdoor unit modules 2 also include the first stop valve
33rd, the second stop valve 34, the 3rd stop valve 35 and the 4th stop valve 36, the first stop valve 33 are connected on the first control valve 24 and room
Between interior machine module 1.Second stop valve 34 is connected between the second control valve 25 and the first common line 3.3rd stop valve 35
It is connected between the 3rd control valve 26 and the second common line 4, one end of the 5th control valve 18 is connected to the He of the 3rd control valve 26
Between 3rd stop valve 35.4th stop valve 36 is connected between the 4th control valve 27 and the first common line 3.Wherein, first
Stop valve 33, the second stop valve 34, the 3rd stop valve 35 and the 4th stop valve 36 are used for the refrigerant of truncated system circulation, are easy to every
The maintenance of individual outdoor unit modules 2.
Specifically, as shown in Fig. 2 each outdoor unit modules 2 have four interfaces respectively, first throttle element 23 and two
Branch road is connected, and the branch road being made up of the first control valve 24 and the first stop valve 33 is first interface 37, by the second control valve 25
Another branch road with the second stop valve 34 composition is the pipeline of second interface 38, the 3rd control valve 26 and the place of the 3rd stop valve 35
For the 3rd interface 39, the pipeline where the 4th control valve 27 and the 4th stop valve 36 is the 4th interface 40, each outdoor unit modules 2
First interface 37 be connected to indoor set module 1, i.e., the first interface 37 of multiple outdoor unit modules 2, which is connected in parallel, is formed as liquid side
Pipeline, the interface 40 of second interface 38 and the 4th of each outdoor unit modules 2 are connected with the first common line 3 respectively, that is to say, that
The interface 40 of second interface 38 and the 4th of each outdoor unit modules 2 is connected in parallel and interconnected by the first common line 3.Often
3rd interface 39 of individual outdoor unit modules 2 is connected with the second common line 4, i.e., the 3rd interface 39 of each outdoor unit modules 2 is simultaneously
Connection connection, now the second common line 4 is gas lateral line.
The defrosting control method of multi-connected air conditioning system according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 3, its
Middle multi-connected air conditioning system is the multi-connected air conditioning system 100 according to the above embodiment of the present invention.
As shown in figure 3, defrosting control method according to embodiments of the present invention comprises the following steps：
S1：When the outdoor unit modules that heating mode is in multiple outdoor unit modules send defrosting instruction, judge
Whether remaining outdoor unit modules in multiple outdoor unit modules are in running order.
S2：When remaining outdoor unit modules is in heating mode, keep heating mode constant, one outdoor unit modules
Four-way valve be switched to refrigeration mode, the first control valve in one outdoor unit modules is closed, the 3rd control valve is closed, the
Four control valves are closed, the second control valve is opened, the 5th control valve is opened and compressor shutdown.
When remaining outdoor unit modules is in off-duty state, remaining outdoor unit modules enters heating mode, and remaining room
The first control valve, the 3rd control valve and the 4th control valve of each outdoor unit modules in outer machine module are opened, one room
The four-way valve of outer machine module is switched to refrigeration mode, and the first control valve in one outdoor unit modules is closed, the 3rd control
Valve is closed, the 4th control valve is closed, the second control valve is opened, the 5th control valve is opened and compressor shutdown.
Specifically, if remaining outdoor unit modules 2 is in heating mode, i.e. now multi-connected air conditioning system 100
All outdoor unit modules 2 are opened heating modes and are simultaneously under normal heating state, that is to say, that the first outdoor unit modules 2a, the
Two outdoor unit modules 2b and the 3rd outdoor unit modules 2c are in normal heating state, now the first outdoor unit modules 2a, second
The first control valve 24, the 3rd control valve 26 and the 4th control valve 27 in outdoor unit modules 2b and the 3rd outdoor unit modules 2c are in
Opening, the second control valve 25 and the 5th control valve 28 are closed, and the first valve port D of each four-way valve 21 and the
Four valve port E are turned on and the second valve port S and the 3rd valve port C conductings.
When the first outdoor unit modules 2a sends defrosting instruction, the first outdoor unit modules 2a compressor 20 reduces output,
Close the first outdoor unit modules 2a the first control valve 24, the 3rd control valve 26 and the 4th control valve 27, the first outdoor unit modules
The 2a power down of four-way valve 21 switches to refrigeration mode, and now the first outdoor unit modules 2a four-way valve 21 is the first valve port D and the
Three valve port C are turned on and the second valve port S and the 4th valve port E conductings, and then, the first outdoor unit modules 2a compressor 20 is shut down, so
The first outdoor unit modules 2a the second control valve 25 and the 5th control valve 28 is opened afterwards.Second outdoor unit modules 2b and the 3rd is outdoor
Machine module 2c keeps heating mode constant.
Frequency increase output can be improved after the first outdoor unit modules 2a shutdown, indoor set module 1 is keeping original pattern just
Often operation.Now as illustrated by the arrows in fig. 1, from the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c compressor 20
The high pressure gaseous refrigerant of exhaust outlet a discharges passes sequentially through the control valve 26 of four-way valve 21 and the 3rd and is drained into the second common line
In 4, refrigerant in the second common line 4 is partly into indoor set module 1, and a part of refrigerant enters indoor set
Condensation radiating is carried out in the indoor heat exchanger 10 of module 1, the refrigerant after condensation is radiated is discharged and passed through from indoor set module 1
Second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the first control valve 24 and first throttle element 23 is drained into accordingly
In outdoor heat exchanger 22, the refrigerant discharged from outdoor heat exchanger 22 is expelled back into compressor 20 by four-way valve 21 and air entry b.
Another part of high pressure gaseous refrigerant in second common line 4 passes through the 5th of the first outdoor unit modules 2a
The outdoor unit modules 2a of control valve 28 and first four-way valve 21 is drained into the first outdoor unit modules 2a outdoor heat exchanger 22, high
The condensation in the first outdoor unit modules 2a outdoor heat exchanger 22 of warm high-pressure gaseous refrigerant is radiated to be carried out to outdoor heat exchanger 22
Defrosting, becomes the liquid refrigerants of low-temp low-pressure after defrosting, the liquid refrigerants throttled by first throttle element 23 after again by the
One outdoor unit modules 2a the second control valve 25 is discharged in the first common line 3, the liquid refrigerants difference in the first common line 3
It is expelled back into by the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the 4th control valve 27 in corresponding compressor 20.From
And complete the defrosting process to the first outdoor unit modules 2a.After defrosting terminates, the four-way valve 21 on the first outdoor unit modules 2a is cut
Heating mode is changed to, closes the first outdoor unit modules 2a the second control valve 25 and the 5th control valve 28, while open the first Room
Outer machine module 2a the first control valve 24, the 3rd control valve 26 and the 4th control valve 27, the first outdoor unit modules 2a are reopened
Heating mode.
It should be noted that when the second outdoor unit modules 2b or the 3rd outdoor unit modules 2c send defrosting instruction, it is multi-joint
The defrosting principle that the defrosting principle of formula air-conditioning system 100 is sent with the first outdoor unit modules 2a when defrosting instructs is identical, here
It is not described in detail.
When simultaneously the first outdoor unit modules 2a, the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c send defrosting request
When, carried out by the sequence of addresses of outdoor unit modules 2, carry out the defrosting of single outdoor unit modules 2 in turn.When single outdoor unit modules 2
When the defrosting that other outdoor unit modules 2 are received during defrosting is asked, it is necessary to wait the outdoor unit modules 2 to defrost to remove
Carried out again by the sequence of addresses of outdoor unit modules 2 after complete frost, carry out single outdoor unit modules 2 in turn and defrost.
If remaining outdoor unit modules 2 is in off-duty state, i.e., now multi-connected air conditioning system 100 only has a room
Outer machine module 2 opens heating mode, such as when the first outdoor unit modules 2a opens heating mode, the second outdoor unit modules 2b and the
Three outdoor unit modules 2c are not turned on heating mode, now the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the first control
Valve 24, the second control valve 25, the 3rd control valve 26 and the 5th control valve 28 processed are closed, the second outdoor unit modules 2b and
3rd outdoor unit modules 2c the 4th control valve 27 is in open mode.When the first outdoor unit modules 2a requirements are defrosted,
First outdoor unit modules 2a compressor 20 reduces output, total defeated when original first outdoor unit modules 2a to be in heating mode
Go out to be averaged onto the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c, and the second outdoor unit modules 2b and the 3rd outdoor unit mould
Block 2c is separately turned on heating mode, and after the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c stable, first is outdoor
Machine module 2a closes the first control valve 24, the 3rd control valve 26 and the 4th control valve 27, the first outdoor unit modules 2a four-way valve
21 power down switch to refrigeration mode, and the first outdoor unit modules 2a compressor 20 is shut down, and then opens the first outdoor unit modules 2a
The second control valve 25 and the 5th control valve 28, indoor set module 1 keeps original pattern normal operation.
Now as illustrated by the arrows in fig. 1, from the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c compressor 20
The high pressure gaseous refrigerants of exhaust outlet a discharges pass sequentially through the control valve 26 of four-way valve 21 and the 3rd and be drained into the second public pipe
In road 4, refrigerant in the second common line 4 is partly into indoor set module 1, and a part of refrigerant enters interior
Condensation radiating is carried out in the indoor heat exchanger 10 of machine module 1, the refrigerant after condensation is radiated is discharged and led to from indoor set module 1
The first control valve 24 and first throttle element 23 for crossing the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c are drained into accordingly
Outdoor heat exchanger 22 in, from outdoor heat exchanger 22 discharge refrigerant compressor 20 is expelled back into by four-way valve 21 and air entry b
It is interior.
Another part of high pressure gaseous refrigerant in second common line 4 passes through the 5th of the first outdoor unit modules 2a
The outdoor unit modules 2a of control valve 28 and first four-way valve 21 is drained into the first outdoor unit modules 2a outdoor heat exchanger 22, high
The condensation in the first outdoor unit modules 2a outdoor heat exchanger 22 of warm high-pressure gaseous refrigerant is radiated to be carried out to outdoor heat exchanger 22
Defrosting, becomes the liquid refrigerants of low-temp low-pressure after defrosting, the liquid refrigerants throttled by first throttle element 23 after again by the
One outdoor unit modules 2a the second control valve 25 is discharged in the first common line 3, the liquid refrigerants difference in the first common line 3
It is expelled back into by the second outdoor unit modules 2b and the 3rd outdoor unit modules 2c the 4th control valve 27 in compressor 20.So as to complete
To the first outdoor unit modules 2a defrosting process.After defrosting terminates, the first outdoor unit modules 2a reopens heating mode, and second
Outdoor unit modules 2b and the 3rd outdoor unit modules 2c is shut down.
The defrosting control method of multi-connected air conditioning system according to embodiments of the present invention, when one of outdoor unit modules 2
When being defrosted, remaining outdoor unit modules 2 is still in heating mode, realizes multi-connected air conditioning system 100 except frost season
Between continuous heating, indoor set module 1 is not shut down, so as to improve the comfortableness of multi-connected air conditioning system 100.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe
Structure, material or feature are contained at least one embodiment or example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can combine in an appropriate manner in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (11)
- A kind of 1. multi-connected air conditioning system, it is characterised in that including：Indoor set module, the indoor set module include at least one indoor heat exchanger；Multiple outdoor unit modules in parallel, each outdoor unit modules include：Compressor, the compressor have exhaust outlet and air entry；Four-way valve, the four-way valve include first to fourth valve port, and first valve port is connected with the exhaust outlet, and described second Valve port is connected with the air entry；Outdoor heat exchanger, one end of the outdoor heat exchanger are connected with the 3rd valve port；First throttle element, the first throttle element are connected with the other end of the outdoor heat exchanger；First control valve, first control valve are connected between the first throttle element and the indoor set module；Second control valve, one end of second control valve are connected between the first throttle element and first control valve Pipeline, the other end of second control valve is connected to the first common line；3rd control valve, one end of the 3rd control valve are connected with the 4th valve port, the other end of the 3rd control valve The second common line is connected to, second common line is connected with the indoor set module；4th control valve, one end of the 4th control valve are connected with the second valve port of the four-way valve, the 4th control valve The other end be connected with first common line；5th control valve, one end of the 5th control valve are connected with the first valve port of the four-way valve, the 5th control valve The other end be connected with second common line；, wherein it is desired to when the outdoor unit modules defrosting of heating mode is in one of them in the multiple outdoor unit modules, Second control valve and the 5th control valve in one of outdoor unit modules are opened, described one of outdoor First control valve, the 3rd control valve in machine module and the 4th control valve are closed, its in the multiple outdoor unit modules First control valve, the 3rd control valve and the 4th control valve in remaining outdoor unit modules are opened, the multiple Second control valve and the 5th control valve in remaining outdoor unit modules in outdoor unit modules are closed.
- 2. multi-connected air conditioning system according to claim 1, it is characterised in that it is single that each outdoor unit modules also include first To valve, first check valve is connected between first valve port and the exhaust outlet with from the exhaust outlet to described One-way conduction on the direction of one valve port.
- 3. multi-connected air conditioning system according to claim 1, it is characterised in that each outdoor unit modules also include oil separation Device, the oil eliminator are connected between the exhaust outlet and first valve port, the oil export of the oil eliminator with it is described Air entry is connected.
- 4. multi-connected air conditioning system according to claim 3, it is characterised in that each outdoor unit modules also include the second section Fluid element, second restricting element are connected between the oil export and the air entry.
- 5. multi-connected air conditioning system according to claim 1, it is characterised in that each outdoor unit modules are also including gas-liquid point From device, the gas-liquid separator has entrance and gas vent, and the gas vent is connected with the air entry, the entrance point It is not connected with second valve port and the 4th control valve.
- 6. multi-connected air conditioning system according to claim 1, it is characterised in that each outdoor unit modules also include first section Only valve, first stop valve are connected between first control valve and the indoor set module.
- 7. multi-connected air conditioning system according to claim 1, it is characterised in that each outdoor unit modules also include second section Only valve, second stop valve are connected between second control valve and first common line.
- 8. multi-connected air conditioning system according to claim 1, it is characterised in that each outdoor unit modules also include the 3rd section Only valve, the 3rd stop valve are connected between the 3rd control valve and second common line, the 5th control valve One end be connected between the 3rd control valve and the 3rd stop valve.
- 9. multi-connected air conditioning system according to claim 1, it is characterised in that each outdoor unit modules also include the 4th section Only valve, the 4th stop valve are connected between the 4th control valve and first common line.
- 10. multi-connected air conditioning system according to claim 1, it is characterised in that first control valve, second control Valve, the 3rd control valve, the 4th control valve and the 5th control valve processed are respectively magnetic valve.
- 11. a kind of defrosting control method of multi-connected air conditioning system, the multi-connected air conditioning system is according to claim 1-10 Any one of multi-connected air conditioning system, it is characterised in that the defrosting control method comprises the following steps：S1：When the outdoor unit modules that heating mode is in the multiple outdoor unit modules send defrosting instruction, judge Whether remaining outdoor unit modules in the multiple outdoor unit modules are in running order；S2：When remaining described outdoor unit modules are in heating mode, keep heating mode constant, one outdoor unit modules Four-way valve be switched to refrigeration mode, first control valve in one outdoor unit modules is closed, the 3rd control Valve is closed, the 4th control valve is closed, second control valve is opened, the 5th control valve is opened and the compressor stops Machine；When remaining described outdoor unit modules are in off-duty state, remaining described outdoor unit modules enter heating mode, and institute State first control valve, the 3rd control valve and the 4th control of each outdoor unit modules in remaining outdoor unit modules Valve processed is opened, second control valve and the 5th control valve of each outdoor unit modules in remaining described outdoor unit modules To close, the four-way valves of one outdoor unit modules is switched to refrigeration mode, and described first in one outdoor unit modules Control valve closing, the 3rd control valve closing, the 4th control valve closing, second control valve opening, the described 5th Control valve is opened and the compressor shutdown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004315.3A CN104764111B (en) | 2014-01-02 | 2014-01-02 | Multi-connected air conditioning system and its defrosting control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004315.3A CN104764111B (en) | 2014-01-02 | 2014-01-02 | Multi-connected air conditioning system and its defrosting control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104764111A CN104764111A (en) | 2015-07-08 |
| CN104764111B true CN104764111B (en) | 2018-04-06 |
Family
ID=53646108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410004315.3A Expired - Fee Related CN104764111B (en) | 2014-01-02 | 2014-01-02 | Multi-connected air conditioning system and its defrosting control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104764111B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12264831B2 (en) * | 2020-12-17 | 2025-04-01 | Gree Electric Appliances, Inc. Of Zhuhai | Defrosting control method and device, and multi-split air conditioner |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288546B (en) * | 2016-09-09 | 2022-04-01 | 珠海格力电器股份有限公司 | Modular multi-split air conditioning system and defrosting control method thereof |
| CN106958929A (en) * | 2017-05-17 | 2017-07-18 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method |
| CN107642835B (en) * | 2017-10-16 | 2024-02-06 | 广东美的暖通设备有限公司 | Multi-split outdoor unit and multi-split with same |
| CN109708216A (en) * | 2018-12-06 | 2019-05-03 | 珠海格力电器股份有限公司 | Modular multi-split air conditioning system and control method thereof |
| WO2021047158A1 (en) * | 2019-09-11 | 2021-03-18 | 广东美的制冷设备有限公司 | Air conditioner and control method therefor |
| CN113669843A (en) * | 2020-04-30 | 2021-11-19 | 青岛海尔空调电子有限公司 | Control method of air conditioning system and air conditioning system |
| CN112984595B (en) * | 2021-03-10 | 2022-04-19 | 青岛海信日立空调系统有限公司 | Ground heating unit |
| CN113007865B (en) * | 2021-04-20 | 2022-09-20 | 广东积微科技有限公司 | Multi-outdoor-unit parallel non-reversing defrosting system and defrosting control method thereof |
| CN115978724A (en) * | 2022-11-30 | 2023-04-18 | 广东建设职业技术学院 | Large heat pump central air-conditioning control system and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878737A (en) * | 2012-10-10 | 2013-01-16 | 南京天加空调设备有限公司 | Method for implementing normal heating of indoor units of modular multi-unit device during defrosting |
| CN103225851A (en) * | 2013-04-27 | 2013-07-31 | 青岛海尔空调电子有限公司 | Multi-connected air-conditioning system with coordinated defrosting function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3208323B2 (en) * | 1996-04-30 | 2001-09-10 | 三洋電機株式会社 | Control method of multi-type air conditioner |
-
2014
- 2014-01-02 CN CN201410004315.3A patent/CN104764111B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878737A (en) * | 2012-10-10 | 2013-01-16 | 南京天加空调设备有限公司 | Method for implementing normal heating of indoor units of modular multi-unit device during defrosting |
| CN103225851A (en) * | 2013-04-27 | 2013-07-31 | 青岛海尔空调电子有限公司 | Multi-connected air-conditioning system with coordinated defrosting function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12264831B2 (en) * | 2020-12-17 | 2025-04-01 | Gree Electric Appliances, Inc. Of Zhuhai | Defrosting control method and device, and multi-split air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104764111A (en) | 2015-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104764111B (en) | Multi-connected air conditioning system and its defrosting control method | |
| EP3441697B1 (en) | Heat recovery variable-frequency multi-split heat pump system and control method thereof | |
| US8567203B2 (en) | Air conditioner and defrosting operation method of the same | |
| US8424333B2 (en) | Air conditioner | |
| US8713958B2 (en) | Air conditioner having indoor and outdoor units | |
| KR101712213B1 (en) | Multi type air conditiner and method of controlling the same | |
| CN104180442B (en) | Air conditioning system | |
| KR101639837B1 (en) | Air conditioner | |
| US20130219943A1 (en) | Outdoor heat exchanger and air conditioner comprising the same | |
| CN107421072B (en) | Air conditioner and high-temperature-resistant control method thereof | |
| US11320186B2 (en) | Heat pump with defrost termination based upon system temperatures | |
| CN106765617B (en) | Air injection enthalpy-increasing heat pump air conditioning system, control method, control device and air conditioner | |
| CN104154673A (en) | Refrigeration method and system for three-pipe heat recovery varied refrigerant volume air-conditioning system | |
| CN104197582B (en) | Multi-connection air conditioning system | |
| CN205619616U (en) | Multi -split air conditioning system | |
| CN104197571A (en) | Three-pipe heat recovery multiple-on-line system | |
| CN104197570B (en) | The heating method of a kind of Three-pipe heat recovery multi-connected machine system and system | |
| CN109654764A (en) | A kind of two-stage enthalpy increasing system and its defrosting control method | |
| JP2015117894A (en) | Air conditioner outdoor unit | |
| EP1655555A2 (en) | Air conditioner | |
| CN205619615U (en) | Multi -split air conditioning system | |
| CN107238161A (en) | Multiple on-line system and its mode switch control method | |
| CN106766334A (en) | Air conditioner circulating system and control method | |
| CN110319542B (en) | Unloading start-stop control method of large-displacement variable-frequency multi-split system | |
| KR101899220B1 (en) | Air Conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180406 |