CN107076476A - Variable refrigerant HVAC system with independent defrosting - Google Patents
Variable refrigerant HVAC system with independent defrosting Download PDFInfo
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- CN107076476A CN107076476A CN201480078379.6A CN201480078379A CN107076476A CN 107076476 A CN107076476 A CN 107076476A CN 201480078379 A CN201480078379 A CN 201480078379A CN 107076476 A CN107076476 A CN 107076476A
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- control device
- compressor
- outdoor unit
- outdoor
- flow
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0232—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses
- F25B2313/02322—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with bypasses during defrosting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B2313/0251—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units being defrosted alternately
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
-
- 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
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A kind of heat pump (100) and its control method are provided.The heat pump (100) includes：Multiple outdoor unit (the 105A that can be run under multiple operator schemes, 105B), the plurality of outdoor unit (105A, 105B) is in fluid communication by heat transfer circuit (200) and one or more indoor units (125).The multiple outdoor unit (105A, first and second in 105B) includes compressor (205A, 205B), first flow control device (220A, 220B), the first flow control device (220A, 220B) it is located at compressor (the 205A on the first flow direction, 205B) with outdoor heat converter (225A, between 225B), it is located at compressor (the 205A on the second flow direction, 205B) between second flow control device (250A, 250B).In a first state, the first flow control device (220A, 220B) allows the outdoor heat converter (225A, 225B) cold-producing medium stream.In the second state, the first flow control device (220A, 220B) allows the cold-producing medium stream of the second flow control device (250A, 250B).The multiple outdoor unit (105A, second flow control device (the 250A of first and second in 105B), 250B) be it is single can be controlled, so that first of the multiple outdoor unit (105A, 105B) and/or second are set as into defrosting mode.
Description
Technical field
The present invention relates to a kind of heat pump.More particularly it relates to variable refrigerant (VRF) heat pump, its
In single outdoor unit can separate defrost.
Background technology
Heat pump is the refrigeration of air adjustment can be carried out to the space by the air being heated or cooled in space
System.Heat pump generally includes four-way reversing valve, the four-way reversing valve be configurable to heating mode and refrigeration mode it
Between change.
The content of the invention
The present invention relates to heat pump.More particularly it relates to variable refrigerant (VRF) heat pump, wherein singly
Individual outdoor unit can be separated and defrosted.
A kind of heat pump is there is described herein, it includes multiple outdoor units, these outdoor units pass through heat transfer circuit
It is in fluid communication with one or more indoor units.Each in multiple outdoor units can be run under multiple operator schemes.It is many
First in individual outdoor unit includes compressor and first flow control device, and the first flow control device is first-class
It is located on dynamic direction between compressor and outdoor heat converter, compressor is located on the second flow direction and is controlled with second flow
Between device.In a first state, first flow control device allows the stream for flowing to outdoor heat converter, in the second state,
First flow control device allows the stream for flowing to second flow control device.Second of multiple outdoor units includes compressor,
And first flow control device, the first flow control device is on the first flow direction positioned at compressor and outdoor heat exchange
Between device, it is located on the second flow direction between compressor and second flow control device.In a first state, first flow
Control device allows the stream for flowing to outdoor heat converter, in the second state, and first flow control device allows to flow to second
The stream of amount control device.First in multiple outdoor units and the second flow control device of second can be single controlled, with
First in multiple outdoor units and/or second are set as defrosting mode.
A kind of heat pump is there is described herein, it includes with one or more indoor unit fluids connecting by heat transfer circuit
Logical multiple outdoor units.Each in multiple outdoor units can be run under multiple operator schemes.In multiple outdoor units
First include compressor, volume control device and Stress control flow path, the volume control device is in the first flowing side
It is located at upwards between compressor and outdoor heat converter, compressor is located on the second flow direction and one or more interiors are single
Between member.Stress control flow path is arranged between volume control device and one or more indoor units.In a first state,
Volume control device allows the stream for flowing to outdoor heat converter, in the second state, volume control device allow to flow to one or
The stream of multiple indoor units.Second of multiple outdoor units includes compressor, volume control device and Stress control stream
Footpath, volume control device is located between compressor and outdoor heat converter on the first flow direction, on the second flow direction
Between compressor and one or more indoor units.Stress control flow path is arranged on volume control device and one or many
Between individual indoor unit.In a first state, volume control device allows the stream for flowing to outdoor heat converter, in the second state
In, volume control device allows the stream for flowing to one or more indoor units.First and second in multiple outdoor units
Stress control flow path can be single controlled, enable and/or disable with optionally first in multiple outdoor units and/or
The pressure control mode of second.
A kind of method for controlling heat pump is there is described herein, the heat pump includes multiple outdoor units.Multiple outdoors
Each in unit at least includes compressor and outdoor heat converter.This method includes determining whether frost conditions,
And set first in multiple outdoor units in response to the determination existed to frost conditions and run in defrost mode.The party
Method is additionally included in second individually run under identical or different operator scheme in multiple outdoor units.
A kind of method for controlling heat pump is there is described herein, heat pump includes multiple outdoor units.It is multiple outdoor single
Each in member at least includes compressor and outdoor heat converter.This method includes determining whether pressure control bar
Part, and first in multiple outdoor units is set in pressure control mode in response to the determination existed to pressure controlling condition
Lower operation.This method is additionally included in second individually run under identical or different operator scheme in multiple outdoor units.
Brief description of the drawings
Referring to the drawings, its part for constituting the present invention, illustrating the system and method described in specification can implement
Embodiment.
Fig. 1 illustrates the schematic diagram of variable refrigerant (VRF) heat pump according to one embodiment；
Fig. 2A illustrates the schematic diagram of the heat transfer circuit of the heat pump according to one embodiment；
Fig. 2 B shows are according to the schematic diagram of the heat transfer circuit of the heat pump of another embodiment；
Fig. 3 illustrates the schematic diagram of according to one embodiment, heat pump in heating mode heat transfer circuit；
Fig. 4 illustrates the schematic diagram of according to one embodiment, heat pump in defrosting mode heat transfer circuit；
Fig. 5 illustrates the schematic diagram of according to one embodiment, heat pump in pressure control mode heat transfer circuit；
Fig. 6 illustrates according to one embodiment, for controlling heat pump method；
The method that Fig. 7 illustrates heat pump according to one embodiment, being run in its heating mode for control.
Identical reference represents identical part.
Embodiment
The present invention relates to heat pump.More particularly it relates to variable refrigerant (VRF) heat pump, wherein singly
Individual outdoor unit can be separated and defrosted.
Embodiment described in text is related to the variable refrigerant heat pump with multiple outdoor units.Multiple outdoor units
In each can be run under various different operation modes.The example of operator scheme includes, but not limited to the mould that freezes
Formula, heating mode, pressure control mode and defrosting mode.In certain embodiments, pressure control mode can be referred to as at certain
Frost prevention pattern under the conditions of a little.Each in multiple outdoor units of heat pump can be run under same operation pattern.
In one embodiment, each in multiple outdoor units is run under different operation modes.For example, an outdoor unit can
Run in its heating mode, and another unit can be run in defrost mode.In one embodiment, in multiple outdoor units
It is one or more can not run (for example, due to maintenance, damage, have a power failure etc. reason and shut down), while multiple outdoor units
In remaining unit can continue to run with.
" heat pump " includes, for example, can carry out air adjustment to the space by the air being heated or cooled in space
Refrigeration system.For example, heat pump can include what is be in fluid communication by heat transfer circuit with one or more indoor units
Multiple outdoor units.
" heat transfer fluid " includes, such as refrigerant, the water of cooling or heating, air, cryogenic liquid, such as, but not limited to
Liquid nitrogen, liquid CO 2 etc..
" heat transfer circuit " includes, such as reversible vapour compression refrigeration loop, the reversible vapour compression refrigeration loop includes
Compressor, at least two heat exchangers, and at least one expansion gear (expansion device).It is appreciated that heat is passed
Pulling over road can be including miscellaneous part, such as, but not limited to, and one or more volume control devices, lubricating oil separator, heat are passed
Pass fluid hydraulic accumulator etc..
" outdoor unit " includes, such as multiple heat transfer components and controller.It is understood that it is one or more other
Part, such as, but not limited to one or more fans, in outdoor unit.
" indoor unit " includes, such as one or more heat transfer components and one or more fans.It is understood that
One or more miscellaneous parts can be included in indoor unit, such as, but not limited in controller.
Fig. 1 illustrates the schematic diagram of variable refrigerant (VRF) heat pump 100 according to one embodiment.VRF heat pumps system
System 100 includes multiple outdoor unit 105A and 105B.Fig. 1 illustrates two outdoor units 105A and 105B.It is understood that
VRF heat pumps 100 may include and other same or similar outdoor units of outdoor unit 105A and 105B.VRF heat pumps
100 outdoor unit 105A and 105B is usually arranged as making heat transfer fluid be recycled to positioned at one or more controlled spaces 130
Interior one or more indoor units 125.Heat transfer fluid can be used to control environmental condition for one or more indoor units 125,
Temperature and/or humidity such as, but not limited to one or more controlled spaces 130, etc..
Outdoor unit 105A aspect can be identical and similar with outdoor unit 105B aspect.Book for the purpose of simplifying the description,
Will description outdoor unit 105A.It is understood that any one of the description suitable for outdoor unit 105A and 105B.
In some embodiments, it is not required that outdoor unit 105A is identical with 105B.For example, outdoor unit 105A and 105B can have not
Capacity together, different type of compressor etc..
Outdoor unit 105A includes multiple heat transfer component 110A and controller 115A.In another embodiment, each
Outdoor unit 105A and 105B do not need corresponding controller 115A and 115B, but can be controlled by a single controller
Whole outdoor units 105.In another embodiment, outdoor unit 105A can have the corresponding control connected with 105B
Device 115A and 115B.
One or more heat transfer component 110A can be combined into heat transfer circuit, and (such as the heat transfer in Fig. 2A -2B is returned
Road 200).The heat transfer circuit can include, for example, compressor (such as the compressor 205A in Fig. 2A -2B), one or more
Expansion gear (such as the expansion gear 235A in Fig. 2A -2B), one or more outdoor heat converters are (such as in Fig. 2A -2B
Outdoor heat converter 225A) and for controlling one or more volume control devices of the flow of heat transfer fluid (such as to scheme
Volume control device 240A, 250A in 2A-2B).One or more heat transfer component 110A can include it is one or more its
His volume control device (such as the volume control device 220A in Fig. 2A -2B), and one or more subcoolers (such as Fig. 2A -
Subcooler 285A in 2B).
Controller 115A controls outdoor unit 105A to provide heat transfer fluid to indoor unit 125.Controller 115A
Can basis, such as the environmental Kuznets Curves requirement of one or more controlled spaces 130, control outdoor unit 105A operation.One
In individual embodiment, controller 115A can control outdoor unit 105A operation, for example, for preventing in outdoor heat converter
Form frost.Controller 115A can be connected with controller 115B, to meet in one or more controlled spaces 130 by environment
Condition requires to maintain environmental condition (such as temperature and/or humidity).Controller 115A and controller 115B it can also be provided that
Outdoor unit 105A is set to be transported under first operator scheme (such as heating mode, defrosting mode, pressure control mode etc.)
OK, outdoor unit 105B is made to be transported under second operator scheme (such as heating mode, defrosting mode, pressure control mode etc.)
OK.It is appreciated that first operator scheme and second operator scheme in one embodiment can be with identical, or at another
Can be different in embodiment.
One or more indoor units 125 can be arranged in one or more controlled spaces 130.It is understood that
One or more controlled spaces 130 can represent more than one controlled in the building of VRF heat pumps 100 positioned at including
Space, one or more indoor units 125 can be located in each in one or more controlled spaces 130.Indoor unit
125 include one or more parts, such as, but not limited to, indoor heat converter, fan/bellows, temperature controller, controller, one
Or multiple sensors etc..
In one embodiment, when in refrigeration mode, outdoor unit 105A can be by heat transfer fluid in liquid form
Supply is to one or more indoor units 125, wherein the heat transfer fluid supplied to one or more indoor units 125 can be from
Heat energy is removed in controlled space.
In one embodiment, when in the heating mode, outdoor unit 105A can be by heat transfer fluid in a gaseous form
Supply is to one or more indoor units 125, wherein supplying to the heat transfer fluid of one or more indoor units 125 to be
Controlled space provides heat energy.
In one embodiment, when in defrosting mode, outdoor unit 105A can supply heat transfer fluid to outdoor
Heat exchanger, but do not supply to one or more indoor units 125, to go defrosting from outdoor heat converter.
In one embodiment, when in pressure control mode, outdoor unit 105A can will be supplied to one or many
Part transfer in the high pressure of individual indoor unit 125, high temperature heat transfer fluid, by the partial high pressure, high temperature heat transfer stream
Body is delivered to outdoor heat converter.In certain embodiments, high pressure, the transfer of high temperature heat transfer fluid can be reduced or prevented
Frost is formed on outdoor heat converter.
Fig. 2A and 2B are illustrated according to some embodiments, for heat pump (such as VRF heat pumps shown in Fig. 1
100) schematic diagram of heat transfer circuit 200.Fig. 2A aspect can be same or similar with Fig. 2 B aspect.
Two outdoor units 105A and 105B are illustrated in figure.It is understood that the principle according to described in text, one
Or other multiple outdoor units can add heat transfer circuit 200.
Book, will describe outdoor unit 105A and corresponding component 205A-290A for the purpose of simplifying the description.It is understood that should
Description goes for any one in outdoor unit 105A and 105B.
Outdoor unit 105A includes compressor 205A.Compressor 205A is run according to principle known in the art, with row
Discharge port 202A outputs high pressure, the heat transfer fluid of high temperature.It is understood that compressor 205A can apply to heat pump system
Any one in the various compressors of system.In one embodiment, compressor 205A can be variable displacement compressor, Neng Gou
Run under more than one capacity.In one embodiment, variable displacement compressor can be variable speed compressor.Compressor
205A suitable example includes, but not limited to helical-lobe compressor, reciprocating compressor, scroll compressor, the compression of positive discharge capacity
Machine, centrifugal compressor etc..It is understood that in certain embodiments, outdoor unit 105A can include multiple compressions
Machine 205A.In such embodiments, compressor 205A can be the compressor of any types, any capacity etc..
It is directed into lubricating oil separator 210A's from the compressor 205A exhaust outlet 202A heat transfer fluids discharged
Entrance 209A.Lubricating oil separator 210A is run according to principle well known in the art.Heat transfer fluid is from lubricating oil separator
210A outlet 211A discharges, and it is conducted through volume control device 215A.Lubricating oil can be directed to lead to from outlet 212A
Cross drier/filter 230A and subtract stream device 260A, return again to compressor 205A suction inlet 203A.Flow control dress
Putting 215A can be, such as check-valves, and the check-valves allows heat transfer fluid to flow to flow control from lubricating oil separator 210A
Device 220A, lubricating oil separator 210A is flowed to without permission heat transfer fluid from volume control device 220A.Subtract stream device
260A can be so that the pressure of lubricating oil therein is flowed through in such as reduction.
According to one embodiment, volume control device 220A can be four-way valve.In this embodiment, volume control device
220A can include being used to control four parts of the flow of heat transfer fluid, and be run according to principle well known in the art.Can be with
Understand, volume control device 220A can be the control dress of the flow in addition to four-way valve that can be run according to the principle of similitude
Put.Volume control device 220A can set first state and the second state respectively by, for example, magnetic valve is switched on or switched off.
In one embodiment, first state corresponds to and supplies high pressure-temperature heat transfer fluid to outdoor heat converter 225A, second
State, which corresponds to, supplies high pressure, high temperature heat transfer fluid to one or more indoor units 125.Can be according to desired operation mould
Formula, first state or the second state are set as by volume control device 220A.Guide to the heat of one or more indoor units 125
Transmit fluid and pass through volume control device 250A, drier/filter 236A, and volume control device 275A.
Volume control device 250A can be that such as electronics two-way valve is such as, but not limited to, the pass ball valve of electronics two.Flow
Control device 250A can allow to pass through in first state, or in the second state be to prevent from passing through.Can be according to outdoor single
First 105A operator scheme control volume control device 250A state.Volume control device 250A and volume control device 250B
Different conditions are can be set as, individually to control outdoor unit 105A and 105B.
Volume control device 275A can be, such as service valve.Volume control device 275A can be set as allowing generally for
Pass through, but can also be set as not allowing by, for example, in order to overhaul during outdoor unit 105A.
There can also be pressure relief path 248A in volume control device 250A either side.
In fig. 2, pressure relief path 248A includes subtracting stream device 262A.Subtracting stream device 262A can reduce by it
In heat transfer fluid pressure.Subtract stream device 262A aspect can with to subtract stream device 260A aspect same or similar.
In one embodiment, under any operator scheme, heat transfer fluid can flow along pressure relief path 248A.As according to
Described by lower Fig. 4, when in defrosting mode, a part of HTHP heat transfer fluid can flow along pressure relief path 248A
It is dynamic, and mixed with the temperature, pressure heat transfer fluid of the cooling from defrosting flow path 290A.
In fig. 2b, pressure relief path 248A includes subtracting stream device 262A, volume control device 245A and flow control
Device 217A.Volume control device 245A can be, such as with least first state (such as allowing flowing) and the second state
The valve of (not allowing flowing for example).In certain embodiments, the solenoid-driven valve can be passed through.Can basis, such as outdoor
Unit 105A operator scheme, the setting (such as volume control device 250A) of another volume control device, the row of compressor
Go out suction pressure of pressure, compressor etc. and carry out control pressure release way 248A.Volume control device 217A aspect can be with
Volume control device 215A aspect is same or similar.Volume control device 217A can allow the flowing (example on a direction
Such as from volume control device 245A to subtract stream device 262A, rather than opposite direction).
Heat pump circuit 200 includes outdoor heat converter 225A.Outdoor heat converter 225A is fluidly connected to one or more
Indoor heat converter (such as the indoor unit 125 in Fig. 1).It is understood that outdoor heat converter 225A and one or many
One or more indoor heat converters of individual indoor unit 125 can be any suitable heat exchanger, wherein pass through
Heat transfer fluid can carry out heat exchange with another heat exchange medium.In one embodiment, outdoor heat converter 225A can
Worked using being set to as condenser (such as when running in cooling mode).In another embodiment, outdoor heat is handed over
Parallel operation 225A could be arranged to work (such as when running in its heating mode) as evaporator.
From one or more indoor units 125 return heat transfer fluid may pass through volume control device 240A, drier/
Filter 234A and subcooler 285A.Subcooler 285A is run according to principle well known in the art, and can for example increase heat pump
The efficiency in loop 200.Heat transfer fluid can generally flow to expansion gear 235A and drier/filter from subcooler 285A
232A.Volume control device 240A can be, such as service valve.Expansion gear 235A and drier/filter 232A, 234A point
Do not run, to reduce the pressure of heat transfer fluid and filter out pollutant, for example but do not limited according to principle well known in the art
In, debris, water, or the like.In one embodiment, a part of heat transfer fluid can be worn along defrosting path 290A flowings
Expansion gear 280A and subcooler 285A are crossed, to shift a part of heat transfer fluid to hydraulic accumulator 255A, and compressor is back to
205A.According to one embodiment, for example, it can pass through Electronic Control expansion gear 235A and 280A.
In certain operations pattern (such as pressure control mode), heat transfer fluid can be along pressure control path 270A
Guiding.Pressure control path 270A can be with such as pressure for reducing heat transfer fluid.Pressure control path 270A includes subtracting
Flow device 264A and volume control device 247A and 249A.The aspect for subtracting stream device 264A can be with subtracting stream device 260A and 262A
Aspect it is same or similar.Volume control device 247A and volume control device 245A (as shown in Figure 2 B) is same or similar.Stream
Amount control device 249A aspect can be same or similar with volume control device 217A (as shown in Figure 2 B) aspect, so as to work as
Volume control device 247 allow by when, it is allowed to heat transfer fluid flows to outdoor heat converter 225A, but whether flow control
How is device 247A state, all prevents heat transfer fluid from flowing to opposite direction.
Hydraulic accumulator 255A is connected to volume control device 220A (such as four-way valve), and compressor 205A.Hydraulic accumulator
255A works according to principle well known in the art.It is understood that in certain embodiments, it is not necessary to drier/filtering
Device 230A and hydraulic accumulator 255A.
Heat pump circuit 200 can be run under multiple operator schemes.Fig. 3-5 respectively show the heat pump for heat pump
The schematic diagram that loop 200 is run under heating mode, defrosting mode and pressure control mode.It is understood that operator scheme
Inventory is exemplary, and heat pump circuit 200 can be run under other one or more operator schemes.For example, heat pump circuit 200
It can run in cooling mode.
With reference to Fig. 2A, refrigeration mode will now be described.It is understood that the effect of refrigeration mode is identical with shown in Fig. 2 B
Or it is similar.In refrigeration mode, heat pump circuit 200 could be arranged to from one or more controlled spaces (such as controlled sky of Fig. 1
Between 130) remove heat energy.Compressor 205A discharges gaseous state heat transfer fluid.Volume control device 220A is in first state (for example
Connect).The heat transfer fluid of discharge is guided to outdoor heat converter 225A.In refrigeration mode, outdoor heat converter 225A
It can be run as condenser, and export liquid heat transfer fluid, the subsequent heat transfer fluid flows through refrigerator 285A.By liquid
Heat transfer fluid is supplied to one or more indoor units 125, and it can be one or more including what can be run as evaporator
Indoor heat converter.Liquid heat transfer fluid can remove heat energy from one or more controlled spaces.Heat transfer fluid is then from one
Individual or multiple indoor units 125 are back to volume control device 220A, and wherein heat transfer fluid is directed to hydraulic accumulator 255A, and
It is back to compressor 205A.
Fig. 3-5 illustrate for heat pump (Fig. 1 heat pump 100) heat pump circuit 200 respectively heating mode,
The schematic diagram run under defrosting mode and pressure control mode.Heat pump is controlled to return by changing the position of volume control device
The flow of heat transfer fluid in road 200 is so as to control various operator schemes.Controller (such as the controller 115A in Fig. 1) can
Volume control device is controlled with the reading being set to according to for example one or more sensors.It is understood that heat pump
Other one or more operator schemes, such as, but not limited to, refrigeration mode can be included.
Fig. 3 illustrate it is according to one embodiment, for heat pump (such as Fig. 1 heat pump 100) in plus
The schematic diagram of the heat pump circuit of heat pattern.In heating mode, heat pump circuit 200 could be arranged to provide heat energy to one or many
Individual controlled space (such as Fig. 1 controlled space 130).Compressor 205A discharges gaseous state heat transfer fluid.Volume control device
220A is in the second state (for example disconnecting).The heat transfer fluid of discharge flows through volume control device 250A, and flow to one or
Multiple indoor units 125.One or more indoor units 125 include one or more indoor heat converters, and this is one or more
Heat exchanger can carry out heat exchange with heat transfer fluid, for absorbing heat from heat transfer fluid.Heat transfer fluid then from
One or more indoor units 125 flow through expansion gear 235A, drier/filter 232A, and guide to outdoor heat friendship
Parallel operation 225A.Heat exchanger 225A can evaporate heat transfer fluid by receiving heat energy from outdoor air.Heat transfer fluid is drawn
Lead through volume control device 220A, into hydraulic accumulator 255A.Heat transfer fluid then flows to compressor from hydraulic accumulator 255A
205A, and repeat the process.
Fig. 4 illustrate it is according to one embodiment, in defrosting mode be used for heat pump (such as Fig. 1 heat pump system
The schematic diagram of the heat pump circuit 200 of system 100).In defrosting mode, outdoor unit 105A and 105B can not be transported under model identical
OK.In defrosting mode, if there is the requirement of heat is needed, heat pump circuit 200 still could be arranged to continue heat energy being supplied to
One or more controlled spaces (such as Fig. 1 controlled space 130), while being defrosted to outdoor unit 105A.Compressor
205A discharges gaseous state heat transfer fluid.Volume control device 220A is in first state (for example connecting).The heat transfer stream of discharge
Direction of flow outdoor heat converter 225A.Because heat transfer fluid is high pressure and high temperature, heat energy can be to outdoor heat converter
225A is defrosted.When in defrosting mode, volume control device 250A is in the second state, prevents high pressure heat transfer fluid stream
Flow to compressor 205A suction inlet 203A.
A part of high pressure heat transfer fluid flows along pressure control path 248A.From one or more indoor units
125 heat transfer fluid can be along defrosting path 290A transfers.The heat transfer of higher temperature from pressure control path 248A
Fluid can be mixed with the chilling temperature heat transfer fluid from defrosting path 290A, by volume control device 220A towards hydraulic accumulator
255A and compressor 205A backflows, as long as outdoor unit 105A is in defrosting mode for so, the process can just be repeated.Can
With the discharge temperature according to such as discharge pressure, suction pressure, and/or the heat transfer fluid from compressor 205A, stream is utilized
The heat transfer fluid of amount control device 280A control chilling temperatures flows through defrosting path 290A amount.Suction pressure can be with for example
By determination of pressure sensor, or in another embodiment, can by heat transfer fluid temperature measuring.In some embodiments
In, suction pressure can be determined between 220A and 255A.Discharge pressure can be with, such as by determination of pressure sensor, Huo Zhe
In another embodiment, can by heat transfer fluid temperature measuring.In certain embodiments, discharge pressure and/or discharge temperature
Degree can be determined between 202A and 209A.
In one embodiment, when entering defrosting mode, compressor 205A capacity can reduce.In the embodiment
In, for example it can reduce capacity by reducing compressor 205A speed.
Fig. 5 illustrates the heat pump (heat pump in Fig. 1 according to one embodiment, in pressure control mode
100) schematic diagram of heat pump circuit 200.In pressure control mode, outdoor unit 105A and 105B can not be in model identicals
Lower operation.In pressure control mode, if there is heating requirements, heat pump circuit 200 could be arranged to continue by heat energy supply to
One or more controlled spaces (such as the controlled space 130 in Fig. 1), while preventing outdoor unit 105A outdoor heat converter
The upper frostings of 225A.
Fig. 5 aspect can be same or similar with Fig. 3 aspect.Except operation in figure 3, a part is high in high pressure
The heat transfer fluid of temperature is transferred to outdoor heat converter 225A by pressure control path 270A.Volume control device 247A is set
In first state, a part of gaseous state heat transfer fluid, which is conducted through, subtracts stream device 264A, into outdoor heat converter 225A.Heat
The transfer for transmitting fluid can be with, for example, reduce the formation of the upper frosts of outdoor heat converter 225A, and increase outdoor unit 105A and enter
Time quantum before defrosting mode (as described by above according to Fig. 4).In one embodiment, pressure controlling condition can be pressure
The suction pressure of contracting machine is less than in suction pressure threshold value.In another embodiment, pressure controlling condition can be in outdoor heat
The temperature of the coil of exchanger 225A general centre is less than in temperature threshold.In certain embodiments, pressure controlling condition bag
Suction pressure is included less than suction pressure threshold value, and the temperature of the coil in outdoor heat converter 225A general centre is less than temperature
Spend in threshold value.
In another embodiment, pressure controlling condition can be that the discharge pressure of compressor is increased above discharge pressure
Threshold value.
In another embodiment, pressure controlling condition can be condition of similarity, and the condition of similarity represents to have begun to
Frost is formed on outdoor heat converter 225A.
Fig. 6 illustrates according to one embodiment, for controlling heat pump (such as the heat pump of Fig. 1) method
600.This method 600 generally includes to determine whether occur frost conditions or pressure controlling condition, and respectively defrosting mode (see with
Figure 4 above is explained in detail to defrosting mode) or pressure control mode under (pressure control mode is explained in detail see figure 5 above)
Run outdoor unit (such as Fig. 1 outdoor unit 105A).In one embodiment, as long as one or more outdoor units are can
Operation, it is possible to implementation 600.In another embodiment, when one or more outdoor units are in heating mode (example
Such as Fig. 7 method 700) when, can implementation 600.
When controller (such as controller 115A or 115B) determines whether there is frost conditions, method 600 is opened 605
Begin.In another embodiment, method 600 can start 615.Frost conditions can include various instructions, show to exist
Frost is formed on the outdoor heat converter of one in one or more outdoor units.If there is frost conditions, corresponding unit
(such as outdoor unit 105A or 105B in Fig. 1) enters defrosting mode 610.As described above, the outdoor with frost conditions
Unit is individually put into defrosting mode, without by controlling one or more volume control devices, (such as flow control is filled
Put 220A and 250A) change the operator schemes of other one or more outdoor units.Because one or more outdoor units are
It is individually controllable, so the outdoor unit with frost conditions is put into defrosting mode, other outdoor units can continue to run with without
Defrosting mode need to be entered.In one embodiment, defrosting mode can run a period of time specified.In another embodiment
In, defrosting mode can be run, and controller can continue to determine whether there are frost conditions, and ought no longer have frost conditions
When, exit defrosting mode.
If frost conditions are not present at 605, controller determines whether there is pressure controlling condition at 615.Pressure control
Condition processed can be, such as suction pressure, the discharge pressure of compressor discharge outlet based on compressor suction inlet, one or
Multiple temperature (such as discharging or providing to the temperature of the heat transfer fluid of compressor from compressor).If there is Stress control
Condition, controller enters pressure control mode 620.As described in above according to Fig. 5, pressure control mode can include making heat
Fluid is transmitted to flow along path 270A.It is similar to 610 defrosting mode, can be the outdoor unit with pressure controlling condition
Pressure control mode is enabled, and other outdoor units can be continued to run with, without changing operator scheme.If there is no Stress control
Pattern, method 600 may return to 605.When heat pump is run, method 600 may be repeated.
In one embodiment, method 600 could be arranged to monitoring frost conditions (such as at 605), rather than pressure
Control condition (such as at 615).In another embodiment, method 600 could be arranged to monitoring pressure controlling condition (for example
At 615), rather than frost conditions (such as at 605).Whether this can be be for example set based on one or more outdoor units
It is set to including Stress control flow path.
Fig. 7 illustrate it is according to one embodiment, for controlling heat pump (such as the heat pump 100 of Fig. 1) adding
The method that (being explained in detail see figure 3 above to heating mode) is run under heat pattern.Method 700 is generally determined when heat pump exists
When being run under heating mode, if occur frost conditions or pressure controlling condition.In response to frost conditions or pressure control bar
Part, method 700 includes changing the operator scheme of heat pump to defrosting mode (see figure 4 above to the detailed of defrosting mode respectively
It is thin to explain) or pressure control mode (being explained in detail see figure 5 above to pressure control mode).
When controller determines the operator scheme for one or more outdoor units of heat pump, method 700 is 705
Start.710, controller determines whether the operator scheme determined at 705 is heating mode.If one or more outdoor single
Member is not run in its heating mode, and then method 700 is back to 705, and continue to monitor one or more outdoor units enter plus
Heat pattern.If at 710, controller determines that one or more outdoor units are run in its heating mode, and method 700 is proceeded to
715。
At 715, controller determines whether there is frost conditions.Frost conditions can include various instructions, show
Frost is formed on the outdoor heat converter of one in one or more outdoor units.It is corresponding single if there is frost conditions
Member will enter defrosting mode at 720.In one embodiment, defrosting mode, which can be run, specifies a period of time.At another
In embodiment, defrosting mode can be run, and controller can continue to determine whether there are frost conditions, and ought no longer have frost
Defrosting mode is exited during condition.
If frost conditions are not present 715, controller determines whether there is pressure controlling condition 725.Stress control
Condition can be, such as based on suction pressure, discharge pressure, one or more temperature.If there is pressure controlling condition, control
Device processed enters pressure control mode 730.As described in above according to Fig. 5, pressure control mode can include making heat transfer stream
Body flows along path 270A.If there is no pressure control mode, method 700 may return to 705.When heat pump operation
When, method 700 may be repeated.
In one embodiment, method 700 could be arranged to monitoring frost conditions (such as at 715), rather than pressure
Control condition (such as at 725).In another embodiment, method 700 could be arranged to monitoring pressure controlling condition (for example
At 725), rather than frost conditions (such as at 715).Whether this can be be for example set based on one or more outdoor units
It is set to including Stress control flow path.
Aspect
It is noted that any one of aspect 1-6 can be combined with aspect 7-12, any one of 13-17 and 18-22.
Any one of aspect 7-12 can be combined with aspect 13-17, and any one of 18-22.Any one of aspect 13-17
It can be combined with any one of aspect 18-22.
Aspect 1
A kind of heat pump, including：
Multiple outdoor units, the plurality of outdoor unit is in fluid communication by heat transfer circuit and one or more indoor units, institute
Each stated in multiple outdoor units may operate under multiple operator schemes；
First in the multiple outdoor unit includes：
Compressor, first flow control device, first flow control device is located at the compressor on the first flow direction
Between outdoor heat converter, it is located on the second flow direction between the compressor and second flow control device, wherein
In a first state, the first flow control device allows the stream for flowing to the outdoor heat converter, in the second state, institute
State the stream that first flow control device allows to flow to the second flow control device；And
Second in the multiple outdoor unit includes：
Compressor, first flow control device, first flow control device is located at the compressor on the first flow direction
Between outdoor heat converter, it is located on the second flow direction between the compressor and second flow control device, wherein
In a first state, the first flow control device allows the stream for flowing to the outdoor heat converter, in the second state, institute
State the stream that first flow control device allows to flow to the second flow control device；
The second flow control device of first and second in wherein the multiple outdoor unit be it is single can be controlled
, it is set as defrosting mode by first of the multiple outdoor unit and/or second.
Aspect 2
Heat pump according to aspect 1, wherein the multiple operator scheme includes refrigeration mode, heating mode, defrosting mould
Formula and pressure control mode.
Aspect 3
Heat pump according to any one of aspect 1-2, wherein when in defrosting mode and the multiple outdoor unit
The first flow control device of first when being in first state, first in the multiple outdoor unit described
Second flow control device prevents high pressure heat transfer fluid stream from entering the compressor of first of the multiple outdoor unit
Suction side.
Aspect 4
Heat pump according to any one of aspect 1-3, wherein when in defrosting mode and the multiple outdoor unit
The first flow control device of second when being in first state, second in the multiple outdoor unit described
Second flow control device prevents high pressure heat transfer fluid stream from entering the compressor of second of the multiple outdoor unit
Suction side.
Aspect 5
Heat pump according to any one of aspect 1-4, wherein described first in the multiple outdoor unit and institute
Second is stated to may operate under different operation modes.
Aspect 6
Heat pump according to any one of aspect 1-5, in addition to defrosting flow path, wherein the defrosting flow path includes
Subcooler and expansion gear between one or more of indoor units and the outdoor heat converter.
Aspect 7
A kind of heat pump, including：
Multiple outdoor units, the plurality of outdoor unit is in fluid communication by heat transfer circuit and one or more indoor units, institute
Each stated in multiple outdoor units may operate under multiple operator schemes；
First in the multiple outdoor unit includes：
Compressor, volume control device and Stress control flow path, the volume control device are upper in the first flow direction
Between compressor and outdoor heat converter, the compressor and one or more indoor units are located on the second flow direction
Between, wherein the Stress control flow path be arranged on the volume control device and one or more of indoor units it
Between, in a first state, the volume control device allows the stream for flowing to the outdoor heat converter, in the second state, institute
State the stream that volume control device allows to flow to one or more of indoor units；And
Second of the multiple outdoor unit includes：
Compressor, volume control device and Stress control flow path, the volume control device are upper in the first flow direction
Between the compressor and outdoor heat converter, the compressor and one or more interiors are located on the second flow direction
Between unit, wherein the Stress control flow path is arranged on the volume control device and one or more of indoor units
Between, in a first state, the volume control device allows the stream for flowing to the outdoor heat converter, in the second state,
The volume control device allows the stream for flowing to one or more of indoor units；
Described first and the Stress control flow path of described second in wherein the multiple outdoor unit be it is single can
It is controlled, be selectively enabled and/or disable in the multiple outdoor unit described first 's and/or described second
Pressure control mode.
Aspect 8
Heat pump according to aspect 7, wherein in response to being brought down below the compressor of suction pressure threshold value at least
One suction pressure and the temperature of the coil about in the middle of the outdoor heat converter are brought down below temperature threshold, selectivity
Ground enables the Stress control flow path.
Aspect 9
Heat pump according to any one of aspect 7-8, wherein in response to the compressor higher than discharge pressure threshold value
Discharge pressure, be selectively enabled the Stress control flow path.
Aspect 10
Heat pump according to any one of aspect 7-8, in response to the compressor higher than the suction pressure threshold value
At least one suction pressure and coil of the pact in the middle of the outdoor heat converter higher than the temperature threshold temperature
Degree, optionally disables the Stress control flow path.
Aspect 11
Heat pump according to aspect 9, wherein in response to described in the compressor less than the discharge pressure threshold value
Discharge pressure, optionally disables the Stress control flow path.
Aspect 12
Heat pump according to any one of aspect 7-11, wherein by setting second flow control device to allow to flow through
The second flow control device, to be selectively enabled the Stress control flow path.
Aspect 13
The method for controlling heat pump, wherein the heat pump is included in multiple outdoor units, the multiple outdoor unit
Each at least include compressor and outdoor heat converter, methods described includes：
Determine whether there is frost conditions；
Set first in the multiple outdoor unit in response to the determination existed to frost conditions and transport in defrost mode
OK；With second individually run under identical or different operator scheme in the multiple outdoor unit.
Aspect 14
Method according to aspect 13, wherein also including：
In response to one or more of the multiple outdoor unit for running in its heating mode, described determine is carried out.
Aspect 15
Method according to any one of aspect 13-14, wherein first set in the multiple outdoor unit is being defrosted
Include preventing high pressure heat transfer fluid stream from entering the suction side of the compressor under pattern.
Aspect 16
Method according to any one of aspect 13-15, wherein first set in the multiple outdoor unit is being defrosted
Operation includes reducing the capacity of the compressor under pattern.
Aspect 17
Method according to aspect 16, wherein the capacity for reducing the compressor includes reducing the speed of the compressor.
Aspect 18
A kind of method for controlling heat pump, wherein the heat pump includes multiple outdoor units, the multiple outdoor unit
In each at least include compressor and outdoor heat converter, methods described includes：
Determine whether there is pressure controlling condition；
First in the multiple outdoor unit is set in Stress control in response to the determination existed to pressure controlling condition
Run under pattern；With
Second in the multiple outdoor unit is individually run under identical or different operator scheme.
Aspect 19
Method according to aspect 18, in addition to：
The confirmation is carried out in response to one or more of the multiple outdoor unit for running in its heating mode.
Aspect 20
Method according to any one of aspect 18-19, wherein setting first in the multiple outdoor unit in pressure
Operation includes enabling Stress control flow path under control model, so as to flow to the heat transfer fluid of one or more indoor units
A part is transferred to the outdoor heat converter by subtracting stream device.
Aspect 21
Method according to any one of aspect 18-20, where it is determined whether there is pressure controlling condition includes at least determining
One of situations below：Whether suction pressure is less than suction pressure threshold value, and the coil about in the middle of the outdoor heat converter
Temperature whether be less than temperature threshold.
Aspect 22
Method according to any one of aspect 18-21, where it is determined whether there is pressure controlling condition includes determining to discharge
Whether pressure is higher than discharge pressure threshold value.
Terminology used herein is intended to describe specific embodiment, is not limited to purpose.Term " one " and
It is " described " to include its plural form, unless explicitly stated otherwise.Terminology used herein " comprising ", which is illustrated, has the spy
Levy, entirety, step, operation, element, and/or part, but be not precluded from other one or more features, entirety, step, operation,
The presence of element, and/or part.
The description as described in above, it is to be appreciated that without departing from the scope of the invention, thus it is possible to vary thin
Section, shape, size and/or the setting of particularly used structural material and part.The word used in specification is " real
Apply example " identical embodiment can be referred to, but not necessarily refer to phase be the same as Example.The description and embodiments of description are only example
Property.On the premise of base region is not departed from, other and further embodiment can be designed, protection scope of the present invention and
Spirit is defined by the claims.
Claims (16)
1. a kind of heat pump, including：
Multiple outdoor units, the plurality of outdoor unit is in fluid communication by heat transfer circuit and one or more indoor units, institute
Each stated in multiple outdoor units may operate under multiple operator schemes；
First in the multiple outdoor unit includes：
Compressor, first flow control device, first flow control device is located at the compressor on the first flow direction
Between outdoor heat converter, it is located on the second flow direction between the compressor and second flow control device, wherein
In a first state, the first flow control device allows the stream for flowing to the outdoor heat converter, in the second state, institute
State the stream that first flow control device allows to flow to the second flow control device；And
Second in the multiple outdoor unit includes：
Compressor, first flow control device, first flow control device is located at the compressor on the first flow direction
Between outdoor heat converter, it is located on the second flow direction between the compressor and second flow control device, wherein
In a first state, the first flow control device allows the stream for flowing to the outdoor heat converter, in the second state, institute
State the stream that first flow control device allows to flow to the second flow control device；
Characterized in that, the second flow control device of first and second in the multiple outdoor unit is single
Can be controlled, it is set as defrosting mode by first of the multiple outdoor unit and/or second.
2. heat pump according to claim 1, it is characterised in that when in defrosting mode and the multiple outdoor list
When the first flow control device of first in member is in first state, first in the multiple outdoor unit
The second flow control device prevents high pressure heat transfer fluid stream from entering the pressure of first in the multiple outdoor unit
The suction side of contracting machine.
3. heat pump according to claim 1, it is characterised in that when in defrosting mode and the multiple outdoor list
When the first flow control device of second in member is in first state, second in the multiple outdoor unit
The second flow control device prevents high pressure heat transfer fluid stream from entering the compression of second of the multiple outdoor unit
The suction side of machine.
4. heat pump according to claim 1, it is characterised in that described first in the multiple outdoor unit and
Described second may operate under different operation modes.
5. heat pump according to claim 1, in addition to defrosting flow path, it is characterised in that the defrosting flow path
Including the subcooler and expansion gear being arranged between one or more of indoor units and the outdoor heat converter.
6. a kind of heat pump, including：
Multiple outdoor units, the plurality of outdoor unit is in fluid communication by heat transfer circuit and one or more indoor units, institute
Each stated in multiple outdoor units may operate under multiple operator schemes；
First in the multiple outdoor unit includes：
Compressor, volume control device and Stress control flow path, the volume control device are upper in the first flow direction
Between the compressor and outdoor heat converter, the compressor and one or more interiors are located on the second flow direction
Between unit, wherein the Stress control flow path is arranged on the volume control device and one or more of indoor units
Between, in a first state, the volume control device allows the stream for flowing to the outdoor heat converter, in the second state,
The volume control device allows the stream for flowing to one or more of indoor units；And
Second of the multiple outdoor unit includes：
Compressor, volume control device and Stress control flow path, the volume control device are upper in the first flow direction
Between the compressor and outdoor heat converter, the compressor and one or more interiors are located on the second flow direction
Between unit, wherein the Stress control flow path is arranged on the volume control device and one or more of indoor units
Between, in a first state, the volume control device allows the stream for flowing to the outdoor heat converter, in the second state,
The volume control device allows the stream for flowing to one or more of indoor units；
Characterized in that, described first and the Stress control flow path of described second in the multiple outdoor unit are
It is single can be controlled, with described first being selectively enabled and/or disabling in the multiple outdoor unit and/or described
The pressure control mode of two.
7. heat pump according to claim 6, it is characterised in that be selectively enabled in response at least one of following
The Stress control flow path：Be brought down below at least one suction pressure of the compressor of suction pressure threshold value, be down to it is low
In the temperature and the pressure higher than discharge pressure threshold value of coil of the pact in the middle of the outdoor heat converter of temperature threshold
The discharge pressure of contracting machine.
8. heat pump according to claim 7, it is characterised in that optionally disabled in response at least one of following
The Stress control flow path：At least one suction pressure higher than the compressor of the suction pressure threshold value, higher than institute
State the temperature of coil of the pact of temperature threshold in the middle of the outdoor heat converter and the institute less than the discharge pressure threshold value
State the discharge pressure of compressor.
9. heat pump according to claim 7, it is characterised in that by setting second flow control device to allow stream
Through the second flow control device, to be selectively enabled the Stress control flow path.
10. control the method for heat pump, it is characterised in that the heat pump includes multiple outdoor units, the multiple room
Each in outer unit at least includes compressor and outdoor heat converter, and methods described includes：
Determine whether there is frost conditions；
Set first in the multiple outdoor unit in response to the determination existed to frost conditions and transport in defrost mode
OK；With second individually run under identical or different operator scheme in the multiple outdoor unit.
11. method according to claim 10, it is characterised in that first in the multiple outdoor unit of setting except
Include preventing high pressure heat transfer fluid stream from entering the suction side of the compressor under white pattern.
12. method according to claim 10, it is characterised in that first in the multiple outdoor unit of setting except
Operation includes reducing the capacity of the compressor under white pattern.
13. method according to claim 12, it is characterised in that the capacity of the reduction compressor includes reducing the pressure
The speed of contracting machine.
14. control the method for heat pump, it is characterised in that the heat pump includes multiple outdoor units, the multiple room
Each in outer unit at least includes compressor and outdoor heat converter, and methods described includes：
Determine whether there is pressure controlling condition；
First in the multiple outdoor unit is set in Stress control in response to the determination existed to pressure controlling condition
Run under pattern；With
Second in the multiple outdoor unit is individually run under identical or different operator scheme.
15. method according to claim 14, it is characterised in that described first in the multiple outdoor unit of setting
Operation includes enabling Stress control flow path in the pressure control mode, so as to flow to the heat transfer of one or more indoor units
A part for fluid is transferred to the outdoor heat converter by subtracting stream device.
16. method according to claim 14, it is characterised in that determine whether there is pressure controlling condition including at least true
Fix and state at least one：Whether suction pressure is less than suction pressure threshold value, coil about in the middle of the outdoor heat converter
Whether whether temperature be higher than discharge pressure threshold value less than temperature threshold and discharge pressure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/076026 WO2015161461A1 (en) | 2014-04-23 | 2014-04-23 | Variable refrigerant hvac system with individual defrost |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107076476A true CN107076476A (en) | 2017-08-18 |
| CN107076476B CN107076476B (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480078379.6A Active CN107076476B (en) | 2014-04-23 | 2014-04-23 | Variable refrigerant HVAC system with independent defrost |
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| Country | Link |
|---|---|
| CN (1) | CN107076476B (en) |
| WO (1) | WO2015161461A1 (en) |
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| CN108131858A (en) * | 2017-11-08 | 2018-06-08 | 珠海格力电器股份有限公司 | A kind of heat pump air conditioning system and its control method |
| CN113970167A (en) * | 2021-10-21 | 2022-01-25 | 珠海格力电器股份有限公司 | Air conditioner defrosting method, device, module, air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6319334B2 (en) * | 2016-01-15 | 2018-05-09 | ダイキン工業株式会社 | Refrigeration equipment |
| JP6824259B2 (en) * | 2016-05-19 | 2021-02-03 | 三菱電機株式会社 | Air conditioner |
| US11156393B2 (en) * | 2016-07-07 | 2021-10-26 | Mitsubishi Electric Corporation | Air-conditioning apparatus with pressure control for defrosting and heating |
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| US4676072A (en) * | 1984-10-26 | 1987-06-30 | Kabushiki Kaisha Toshiba | Bypass system for a dual refrigeration cycle air conditioner |
| US5896922A (en) * | 1997-07-16 | 1999-04-27 | International Business Machines Corporation | Cold plate for dual refrigeration systems |
| CN101435638A (en) * | 2008-12-26 | 2009-05-20 | 哈尔滨工业大学 | Air source heat pump system capable of continuously supplying heat by refrigerant super cooling defrost |
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| CN108131858A (en) * | 2017-11-08 | 2018-06-08 | 珠海格力电器股份有限公司 | A kind of heat pump air conditioning system and its control method |
| CN108131858B (en) * | 2017-11-08 | 2019-08-27 | 珠海格力电器股份有限公司 | A kind of heat pump air conditioning system and its control method |
| CN113970167A (en) * | 2021-10-21 | 2022-01-25 | 珠海格力电器股份有限公司 | Air conditioner defrosting method, device, module, air conditioner and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107076476B (en) | 2020-01-14 |
| WO2015161461A1 (en) | 2015-10-29 |
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