CN205002278U - Variable refrigerant heat pump system of independent defrosting in area - Google Patents
Variable refrigerant heat pump system of independent defrosting in area Download PDFInfo
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- CN205002278U CN205002278U CN201520250417.3U CN201520250417U CN205002278U CN 205002278 U CN205002278 U CN 205002278U CN 201520250417 U CN201520250417 U CN 201520250417U CN 205002278 U CN205002278 U CN 205002278U
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Abstract
The utility model describes a variable refrigerant heat pump system of independent defrosting in area includes: a plurality of outdoor units that can move under a plurality of mode of operations, these a plurality of outdoor units are through heat transfer return circuit and one or more indoor unit fluid intercommunication. First and individual compressor, the flow control device of including of second in a plurality of outdoor units, a flow control device lies in in first mobile orientation between compressor and the outdoor heat exchanger, lie in on the second flow direction between compressor and the 2nd flow control device. In first state, the flow direction is permitted to a flow control device outdoor heat exchanger's stream. In the second state, the flow direction is permitted to a flow control device the stream of the 2nd flow control device. First and second in a plurality of outdoor units the 2nd flow control device be single can be controlled, with will first and/or second of a plurality of outdoor units are set for to defrost mode.
Description
Technical field
The present invention relates to a kind of heat pump.More specifically, the present invention relates to variable refrigerant (VRF) heat pump, wherein single outdoor unit can separately defrost.
Background technology
Heat pump is the refrigeration system can being carried out air conditioning by the air in heating or cooling space to this space.Heat pump generally includes four-way change-over valve, and this four-way change-over valve can be configured to change between heating mode and refrigeration mode.
Summary of the invention
The present invention relates to heat pump.More specifically, the present invention relates to variable refrigerant (VRF) heat pump, wherein single outdoor unit can separately defrost.
There is described herein a kind of heat pump, it comprises multiple outdoor unit, and these outdoor units are communicated with one or more indoor unit fluid by heat transfer circuit.Each in multiple outdoor unit can be run under multiple operator scheme.First in multiple outdoor unit comprises compressor and first flow control device, this first flow control device on the first flow direction between compressor and outdoor heat converter, on the second flow direction between compressor and second amount control device.In the first state, first flow control device allows the stream flowing to outdoor heat converter, and in the second state, first flow control device allows the stream flowing to second amount control device.Second of multiple outdoor unit comprises compressor, and first flow control device, this first flow control device on the first flow direction between compressor and outdoor heat converter, on the second flow direction between compressor and second amount control device.In the first state, first flow control device allows the stream flowing to outdoor heat converter, and in the second state, first flow control device allows the stream flowing to second amount control device.First in multiple outdoor unit and the second amount control device of second can be single controlled, so that first in multiple outdoor unit and/or second are set as defrosting mode.
There is described herein a kind of heat pump, it comprises the multiple outdoor units be communicated with one or more indoor unit fluid by heat transfer circuit.Each in multiple outdoor unit can be run under multiple operator scheme.First in multiple outdoor unit comprises compressor, volume control device and Stress control flow path, this volume control device on the first flow direction between compressor and outdoor heat converter, on the second flow direction between compressor and one or more indoor unit.Stress control flow path is arranged between volume control device and one or more indoor unit.In the first state, volume control device allows the stream flowing to outdoor heat converter, and in the second state, volume control device allows the stream flowing to one or more indoor unit.Second of multiple outdoor unit comprises compressor, volume control device and Stress control flow path, volume control device on the first flow direction between compressor and outdoor heat converter, on the second flow direction between compressor and one or more indoor unit.Stress control flow path is arranged between volume control device and one or more indoor unit.In the first state, volume control device allows the stream flowing to outdoor heat converter, and in the second state, volume control device allows the stream flowing to one or more indoor unit.The Stress control flow path of first and second in multiple outdoor unit can be single controlled, optionally to enable and/or to forbid the pressure control mode of in multiple outdoor unit first and/or second.
There is described herein a kind of method controlling heat pump, this heat pump comprises multiple outdoor unit.Each in multiple outdoor unit at least comprises compressor and outdoor heat converter.The method comprises and determines whether there is frost conditions, and first of setting in multiple outdoor unit runs in defrost mode in response to the determination existed frost conditions.The method individually runs second in multiple outdoor unit under being also included in identical or different operator scheme.
There is described herein a kind of method controlling heat pump, heat pump comprises multiple outdoor unit.Each in multiple outdoor unit at least comprises compressor and outdoor heat converter.The method comprises and determines whether there is pressure controlling condition, and first of setting in multiple outdoor unit runs in the pressure control mode in response to the determination existed pressure controlling condition.The method individually runs second in multiple outdoor unit under being also included in identical or different operator scheme.
Accompanying drawing explanation
With reference to accompanying drawing, it forms a part of the present invention, illustrates the embodiment that the system and method that describes in description can be implemented.
Fig. 1 illustrates the schematic diagram of variable refrigerant (VRF) heat pump according to an embodiment;
Fig. 2 A illustrates the schematic diagram of the heat transfer circuit of the heat pump according to an embodiment;
Fig. 2 B illustrates the schematic diagram of the heat transfer circuit of the heat pump according to another embodiment;
Fig. 3 illustrate according to an embodiment, the schematic diagram of the heat transfer circuit of heat pump in heating mode;
Fig. 4 illustrate according to an embodiment, the schematic diagram of the heat transfer circuit of heat pump in defrosting mode;
Fig. 5 illustrate according to an embodiment, the schematic diagram of the heat transfer circuit of heat pump in pressure control mode;
Fig. 6 illustrate according to an embodiment, for controlling the method for heat pump;
Fig. 7 illustrate according to an embodiment, for controlling the method for the heat pump run in its heating mode.
Identical Reference numeral represents identical parts.
Detailed description of the invention
The present invention relates to heat pump.More specifically, the present invention relates to variable refrigerant (VRF) heat pump, wherein single outdoor unit can separately defrost.
The embodiment described in literary composition relates to the variable refrigerant heat pump with multiple outdoor unit.Each in multiple outdoor unit can both be run under various different operation modes.The example of operator scheme includes, but not limited to refrigeration mode, heating mode, pressure control mode and defrosting mode.In certain embodiments, pressure control mode can be called as frost prevention pattern under certain conditions.Each in multiple outdoor units of heat pump can be run under same operation pattern.In one embodiment, each in multiple outdoor unit is run under different operation modes.Such as, an outdoor unit can run in its heating mode, and another unit can run in defrost mode.In one embodiment, one or more in multiple outdoor unit can not run (such as, shutting down due to reasons such as maintenance, damage, power failures), and in multiple outdoor unit, remaining unit can continue to run simultaneously.
" heat pump " comprises, such as, can be carried out the refrigeration system of air conditioning to this space by the air in heating or cooling space.Such as, heat pump can comprise the multiple outdoor units be communicated with one or more indoor unit fluid by heat transfer circuit.
" heat transfer fluid " comprises, and water, air, the cryogenic liquid of such as cold-producing medium, cooling or heating, such as but not limited to liquid nitrogen, liquid CO 2 etc.
" heat transfer circuit " comprises, such as reversible vapour compression refrigeration loop, and this reversible vapour compression refrigeration loop comprises compressor, at least two heat exchangers, and at least one expansion gear (expansiondevice).Be understandable that heat transfer circuit can comprise miscellaneous part, such as but not limited to, one or more volume control device, lubricating oil separator, heat transfer fluid hydraulic accumulator etc.
" outdoor unit " comprises, such as multiple heat transfer component and controller.Be understandable that one or more miscellaneous part, such as but not limited to one or more fan, is included in outdoor unit.
" indoor unit " comprises, such as one or more heat transfer component and one or more fan.Be understandable that, one or more miscellaneous part 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 an embodiment.VRF heat pump 100 comprises multiple outdoor unit 105A and 105B.Fig. 1 illustrates two outdoor unit 105A and 105B.Be understandable that, VRF heat pump 100 can comprise other outdoor units same or similar with outdoor unit 105A and 105B.Outdoor unit 105A and 105B of VRF heat pump 100 is configured such that heat transfer fluid is circulated to the one or more indoor units 125 being positioned at one or more controlled space 130 usually.One or more indoor unit 125 can use heat transfer fluid to control environment condition, such as, but not limited to temperature and/or the humidity of one or more controlled space 130, etc.
The aspect of outdoor unit 105A can be identical with the aspect of outdoor unit 105B and similar.Book for the purpose of simplifying the description, will describe outdoor unit 105A.Be understandable that, this description is applicable to any one in outdoor unit 105A and 105B.In certain embodiments, do not require that outdoor unit 105A with 105B is identical.Such as, outdoor unit 105A and 105B can have different capacity, different type of compressor etc.
Outdoor unit 105A comprises multiple heat transfer component 110A and controller 115A.In another embodiment, each outdoor unit 105A and 105B does not need corresponding controller 115A and 115B, but can control whole outdoor units 105 by an independent controller.In another embodiment, outdoor unit 105A with 105B can have corresponding controller 115A and 115B be communicated with.
One or more heat transfer component 110A can be combined into heat transfer circuit (heat transfer circuit 200 in such as Fig. 2 A-2B).This heat transfer circuit can comprise, such as, compressor (the compressor 205A in such as Fig. 2 A-2B), one or more expansion gear (the expansion gear 235A in such as Fig. 2 A-2B), one or more outdoor heat converter (the outdoor heat converter 225A in such as Fig. 2 A-2B) and the one or more volume control devices (volume control device 240A, 250A in such as Fig. 2 A-2B) for the flow that controls heat transfer fluid.One or more heat transfer component 110A can comprise other volume control devices one or more (the volume control device 220A in such as Fig. 2 A-2B), and one or more subcooler (the subcooler 285A in such as Fig. 2 A-2B).
Controller 115A controls outdoor unit 105A so that heat transfer fluid is provided to indoor unit 125.Controller 115A can basis, such as the environmental Kuznets Curves requirement of one or more controlled space 130, controls the operation of outdoor unit 105A.In one embodiment, controller 115A can control the operation of outdoor unit 105A, such as, for preventing from forming frost on outdoor heat converter.Controller 115A can be communicated with controller 115B, maintains environmental condition (such as temperature and/or humidity etc.) to meet in one or more controlled space 130 by requirement for environmental conditions.Controller 115A and controller 115B also can be configured such that outdoor unit 105A can run under the first operator scheme (such as heating mode, defrosting mode, pressure control mode etc.), and outdoor unit 105B is run under the second operator scheme (such as heating mode, defrosting mode, pressure control mode etc.).Be understandable that the first operator scheme and the second operator scheme in one embodiment can be identical, or in another embodiment can be different.
One or more indoor unit 125 can be arranged in one or more controlled space 130.Be understandable that, one or more controlled space 130 can represent the more than one controlled space being positioned at the building comprising VRF heat pump 100, and one or more indoor unit 125 can be arranged in each of one or more controlled space 130.Indoor unit 125 comprises one or more parts, such as, but not limited to, indoor heat converter, fan/bellows, temperature controller, controller, one or more sensor etc.
In one embodiment, when being in refrigeration mode, heat transfer fluid can be supplied to one or more indoor unit 125 by outdoor unit 105A in liquid form, and the heat transfer fluid being wherein supplied to one or more indoor unit 125 can remove heat energy from controlled space.
In one embodiment, when in the heating mode, heat transfer fluid can be supplied to one or more indoor unit 125 by outdoor unit 105A in a gaseous form, and the heat transfer fluid being wherein supplied to one or more indoor unit 125 can provide heat energy for controlled space.
In one embodiment, when being in defrosting mode, heat transfer fluid can be supplied to outdoor heat converter by outdoor unit 105A, but is not supplied to one or more indoor unit 125, with the frost of heat exchanger removal outdoor.
In one embodiment, when being in pressure control mode, the part transfer that outdoor unit 105A can will be supplied in the high pressure of one or more indoor unit 125, high temperature heat transfer fluid, to be delivered to outdoor heat converter by this partial high pressure, high temperature heat transfer fluid.In certain embodiments, the transfer of high pressure, high temperature heat transfer fluid can reduce or prevent to form frost on outdoor heat converter.
Fig. 2 A and 2B illustrates according to some embodiments, schematic diagram for the heat transfer circuit 200 of heat pump (the VRF heat pump 100 such as shown in Fig. 1).The aspect of Fig. 2 A can be same or similar with the aspect of Fig. 2 B.
Two outdoor unit 105A and 105B are illustrated in figure.Be understandable that, according to the principle described in literary composition, other outdoor units one or more can add heat transfer circuit 200.
Book for the purpose of simplifying the description, will describe outdoor unit 105A and corresponding component 205A-290A.Be understandable that, this description goes for any one in outdoor unit 105A and 105B.
Outdoor unit 105A comprises compressor 205A.Compressor 205A runs according to principle known in the art, to export the heat transfer fluid of high pressure, high temperature at exhaust outlet 202A.Be understandable that, compressor 205A can be in the various compressors being applicable to heat pump any one.In one embodiment, compressor 205A can be variable displacement compressor, can run under more than one capacity.In one embodiment, variable displacement compressor can be variable speed compressor.The suitable example of compressor 205A includes, but not limited to helical-lobe compressor, reciprocating compressor, scroll compressor, positive displacement compressor, centrifugal compressor etc.Be understandable that, in certain embodiments, outdoor unit 105A can comprise multiple compressor 205A.In such embodiments, compressor 205A can be the compressor of any type, any capacity etc.
The heat transfer fluid of discharging from the exhaust outlet 202A of compressor 205A is directed into the entrance 209A of lubricating oil separator 210A.Lubricating oil separator 210A runs according to principle well known in the art.Heat transfer fluid is discharged from the outlet 211A of lubricating oil separator 210A, and is conducted through volume control device 215A.Lubricating oil can be conducted through drier/filter 230A from outlet 212A and subtract stream device 260A, then is back to the suction inlet 203A of compressor 205A.Volume control device 215A can be, such as check-valves, and this check-valves allows heat transfer fluid to flow to volume control device 220A from lubricating oil separator 210A, and does not allow heat transfer fluid to flow to lubricating oil separator 210A from volume control device 220A.Subtract stream device 260A passable, such as, reduce the pressure of the lubricating oil flow through wherein.
According to an embodiment, volume control device 220A can be cross valve.In this embodiment, volume control device 220A can comprise four parts of the flow for controlling heat transfer fluid, and runs according to principle well known in the art.Be understandable that, volume control device 220A can be the volume control device except cross valve that can run according to the principle of similitude.Volume control device 220A can pass through, such as, be switched on or switched off magnetic valve and set the first state and the second state respectively.In one embodiment, the first state corresponds to and high pressure-temperature heat transfer fluid is supplied to outdoor heat converter 225A, and the second state corresponds to and high pressure, high temperature heat transfer fluid are supplied to one or more indoor unit 125.According to the operator scheme wanted, volume control device 220A can be set as the first state or the second state.Guide to the heat transfer fluid of one or more indoor unit 125 through volume control device 250A, drier/filter 236A, and volume control device 275A.
Volume control device 250A can be, such as electronics two-way valve, such as but not limited to, electronics two pass ball valve.Volume control device 250A can allow to pass through when the first state, or is prevent from passing through in the second state.Can according to the state of the operator scheme control flow check amount control device 250A of outdoor unit 105A.Volume control device 250A and volume control device 250B can be set as different conditions, to control separately outdoor unit 105A and 105B.
Volume control device 275A can be, such as service valve.Volume control device 275A can be set as usually allowing to pass through, but also can be set as not allowing to pass through, such as, time in order to overhaul outdoor unit 105A.
Also pressure relief path 248A can be there is at the either side of volume control device 250A.
In fig. 2, pressure relief path 248A comprises and subtracts stream device 262A.Subtract the pressure that stream device 262A can be reduced by heat transfer fluid wherein.The aspect subtracting stream device 262A can with to subtract the aspect flowing device 260A same or similar.In one embodiment, under any operator scheme, heat transfer fluid can flow along pressure relief path 248A.As described by following Fig. 4, when being in defrosting mode, a part of HTHP heat transfer fluid can flow along pressure relief path 248A, and mixes with the temperature, pressure heat transfer fluid of the cooling from the flow path 290A that defrosts.
In fig. 2b, pressure relief path 248A comprises and subtracts stream device 262A, volume control device 245A and volume control device 217A.Volume control device 245A can be, such as, have the valve of at least the first state (such as allowing to flow) and the second state (such as not allowing to flow).In certain embodiments, can by this valve of solenoid-driven.Can basis, the operator scheme of such as outdoor unit 105A, the setting (such as volume control device 250A) of another volume control device, the discharge pressure of compressor, the suction pressure etc. of compressor carry out controlled pressure release way 248A.The aspect of volume control device 217A can be same or similar with the aspect of volume control device 215A.Volume control device 217A can allow the flowing on a direction (such as from volume control device 245A to subtracting stream device 262A, instead of rightabout).
Heat pump circuit 200 comprises outdoor heat converter 225A.Outdoor heat converter 225A fluid is communicated to one or more indoor heat converter (indoor unit 125 in such as Fig. 1).Be understandable that, one or more indoor heat converters of outdoor heat converter 225A and one or more indoor unit 125 can be any suitable heat exchangers, wherein can carry out heat exchange with another kind of heat exchange medium through heat transfer fluid wherein.In one embodiment, outdoor heat converter 225A can be set to work (such as when running in cooling mode) as condenser.In another embodiment, outdoor heat converter 225A can be set to work (when such as running in its heating mode) as evaporimeter.
The heat transfer fluid returned from one or more indoor unit 125 can pass volume control device 240A, drier/filter 234A and subcooler 285A.Subcooler 285A runs according to principle well known in the art, and such as can increase the efficiency of heat pump circuit 200.Heat transfer fluid can flow to expansion gear 235A and drier/filter 232A from subcooler 285A usually.Volume control device 240A can be, such as service valve.Expansion gear 235A and drier/filter 232A, 234A runs according to principle well known in the art respectively, to reduce pressure and the filter contaminants of heat transfer fluid, such as but not limited to, foreign material, water or analog.In one embodiment, a part of heat transfer fluid can flow through expansion gear 280A and subcooler 285A along defrosting path 290A, to shift a part of heat transfer fluid to hydraulic accumulator 255A, and is back to compressor 205A.According to an embodiment, such as, Electronic Control expansion gear 235A and 280A can be passed through.
In certain operations pattern (such as pressure control mode), heat transfer fluid can guide along pressure control path 270A.Pressure control path 270A is passable, such as, for reducing the pressure of heat transfer fluid.Pressure control path 270A comprise subtract stream device 264A and volume control device 247A and 249A.The aspect subtracting stream device 264A can with to subtract the aspect flowing device 260A and 262A same or similar.Volume control device 247A and volume control device 245A (as shown in Figure 2 B) is same or similar.The aspect of volume control device 249A can be same or similar with the aspect of volume control device 217A (as shown in Figure 2 B), thus when volume control device 247 allows to pass through, heat transfer fluid is allowed to flow to outdoor heat converter 225A, but no matter the state of volume control device 247A how, all prevents heat transfer fluid from flowing to rightabout.
Hydraulic accumulator 255A is connected to volume control device 220A (such as cross valve), and compressor 205A.Hydraulic accumulator 255A works according to principle well known in the art.Be understandable that, in certain embodiments, do not need drier/filter 230A and hydraulic accumulator 255A.
Heat pump circuit 200 can be run under multiple operator scheme.Fig. 3-5 respectively show the schematic diagram that the heat pump circuit 200 for heat pump is run under heating mode, defrosting mode and pressure control mode.Be understandable that, operator scheme inventory is exemplary, and heat pump circuit 200 can be run under other operator schemes one or more.Such as, heat pump circuit 200 can be run in cooling mode.
With reference to figure 2A, now refrigeration mode is described.Be understandable that, same or similar shown in the effect of refrigeration mode and Fig. 2 B.In refrigeration mode, heat pump circuit 200 can be set to remove heat energy from one or more controlled space (controlled space 130 of such as Fig. 1).Compressor 205A discharges gaseous state heat transfer fluid.Volume control device 220A is in the first state (such as connecting).The heat transfer fluid of discharging is guided to outdoor heat converter 225A.In refrigeration mode, outdoor heat converter 225A can run as condenser, and dispensing liquid heat transfer fluid, this heat transfer fluid flows through refrigerator 285A subsequently.Liquid heat transfer fluid is supplied to one or more indoor unit 125, and it can comprise the one or more indoor heat converters that can be used as evaporimeter and run.Liquid heat transfer fluid can remove heat energy from one or more controlled space.Heat transfer fluid is back to volume control device 220A from one or more indoor unit 125 subsequently, and wherein heat transfer fluid is directed to hydraulic accumulator 255A, and is back to compressor 205A.
Fig. 3-5 illustrates the schematic diagram that the heat pump circuit 200 for heat pump (heat pump 100 of Fig. 1) is run respectively under heating mode, defrosting mode and pressure control mode.Control the flow of the heat transfer fluid in heat pump circuit 200 by the position changing volume control device thus control various operator scheme.Controller (the controller 115A in such as Fig. 1) can be set to the reading control flow check amount control device according to such as one or more sensor.Be understandable that, heat pump can comprise other operator schemes one or more, such as but not limited to, refrigeration mode.
Fig. 3 illustrate according to an embodiment, for the schematic diagram being in the heat pump circuit of heating mode of heat pump (heat pump 100 of such as Fig. 1).At heating mode, heat pump circuit 200 can be set to heat energy is provided to one or more controlled space (controlled space 130 of such as Fig. 1).Compressor 205A discharges gaseous state heat transfer fluid.Volume control device 220A is in the second state (such as disconnecting).The heat transfer fluid of discharging flows through volume control device 250A, and flow to one or more indoor unit 125.One or more indoor unit 125 comprises one or more indoor heat converter, and this one or more heat exchanger can carry out heat exchange with heat transfer fluid, for absorbing heat from heat transfer fluid.Heat transfer fluid flows through expansion gear 235A, drier/filter 232A from one or more indoor unit 125 subsequently, and guides to outdoor heat converter 225A.Heat exchanger 225A evaporates heat transfer fluid by air receiver heat energy outdoor.Heat transfer fluid is guided through volume control device 220A, enters hydraulic accumulator 255A.Heat transfer fluid flows to compressor 205A from hydraulic accumulator 255A subsequently, and repeats this process.
Fig. 4 illustrate according to an embodiment, the schematic diagram of the heat pump circuit 200 for heat pump (heat pump 100 of such as Fig. 1) that is in defrosting mode.At defrosting mode, outdoor unit 105A and 105B can not run under model identical.At defrosting mode, if there is the requirement needing heat, heat pump circuit 200 still can be set to continue heat energy to be supplied to one or more controlled space (controlled space 130 of such as Fig. 1), defrosts to outdoor unit 105A simultaneously.Compressor 205A discharges gaseous state heat transfer fluid.Volume control device 220A is in the first state (such as connecting).The heat transfer fluid of discharging flows to outdoor heat converter 225A.Because heat transfer fluid is high pressure and high temperature, so heat energy can defrost to outdoor heat converter 225A.When being in defrosting mode, volume control device 250A is in the second state, prevents high pressure heat transfer fluid stream from flowing to the suction inlet 203A of compressor 205A.
Part high pressure heat transfer fluid flows along pressure control path 248A.Heat transfer fluid from one or more indoor unit 125 can shift along defrosting path 290A.Heat transfer fluid from the higher temperature of pressure control path 248A can mix with the chilling temperature heat transfer fluid from the path 290A that defrosts, refluxed towards hydraulic accumulator 255A and compressor 205A by volume control device 220A, as long as outdoor unit 105A is in defrosting mode like this, this process just can repeat.Can, according to the discharge temperature of such as discharge pressure, suction pressure and/or the heat transfer fluid from compressor 205A, the heat transfer fluid of volume control device 280A controlled cooling model temperature be utilized to flow through the amount of defrosting path 290A.Suction pressure is passable, such as, by determination of pressure sensor, or in another embodiment, and can by the temperature measuring of heat transfer fluid.In certain embodiments, suction pressure can measure between 220A and 255A.Discharge pressure is passable, such as, by determination of pressure sensor, or in another embodiment, and can by the temperature measuring of heat transfer fluid.In certain embodiments, discharge pressure and/or discharge temperature can measure between 202A and 209A.
In one embodiment, when entering defrosting mode, the capacity of compressor 205A can reduce.In this embodiment, such as capacity can be reduced by the speed reducing compressor 205A.
Fig. 5 illustrate according to an embodiment, at the schematic diagram of the heat pump circuit 200 of the heat pump (heat pump 100 in Fig. 1) of pressure control mode.In pressure control mode, outdoor unit 105A and 105B can not run under model identical.At pressure control mode, if there is heating requirements, heat pump circuit 200 can be set to continue heat energy to be supplied to one or more controlled space (controlled space 130 in such as Fig. 1), frosting on the outdoor heat converter 225A simultaneously preventing outdoor unit 105A.
The aspect of Fig. 5 can be same or similar with the aspect of Fig. 3.Except operation in figure 3, the heat transfer fluid that a part is in high pressure-temperature is transferred to outdoor heat converter 225A by pressure control path 270A.Volume control device 247A is arranged on the first state, and a part of gaseous state heat transfer fluid is conducted through and subtracts stream device 264A, enters outdoor heat converter 225A.The transfer of heat transfer fluid is passable, such as, reduce the upper white formation of outdoor heat converter 225A, and increase outdoor unit 105A enter defrosting mode before the time quantum of (as above described by Fig. 4).In one embodiment, pressure controlling condition can be that the suction pressure of compressor is lower than in suction pressure threshold value.In another embodiment, pressure controlling condition can be that the temperature of the coil of general centre at outdoor heat converter 225A is lower than in temperature threshold.In certain embodiments, pressure controlling condition comprises suction pressure lower than suction pressure threshold value, and the temperature of coil in the general centre of outdoor heat converter 225A is lower than in temperature threshold.
In another embodiment, pressure controlling condition can be that the discharge pressure of compressor is increased to higher than discharge pressure threshold value.
In another embodiment, pressure controlling condition can be condition of similarity, this condition of similarity represent start on outdoor heat converter 225A formed frost.
Fig. 6 illustrate according to an embodiment, for controlling the method 600 of heat pump (heat pump of such as Fig. 1).The method 600 generally includes and determines whether frost conditions or pressure controlling condition occur, and respectively under defrosting mode (see the detailed explanation of above Fig. 4 to defrosting mode) or pressure control mode (see the detailed explanation of above Fig. 5 to pressure control mode) run outdoor unit (the outdoor unit 105A of such as Fig. 1).In one embodiment, as long as one or more outdoor unit is exercisable, just can to implement the method 600.In another embodiment, when one or more outdoor unit is in heating mode (method 700 of such as Fig. 7), can implementation method 600.
When controller (such as controller 115A or 115B) determines whether there is frost conditions, method 600 starts 605.In another embodiment, method 600 can start 615.Frost conditions can comprise various instruction, and the outdoor heat converter showing in one or more outdoor unit forms frost.If there is frost conditions, corresponding unit (outdoor unit 105A or 105B in such as Fig. 1) enters defrosting mode 610.As mentioned above, the outdoor unit with frost conditions puts into defrosting mode individually, and does not need the operator scheme changing other outdoor units one or more by controlling one or more volume control device (such as volume control device 220A and 250A).Because one or more outdoor unit is controlled separately, the outdoor unit with frost conditions puts into defrosting mode, and other outdoor units can continue run and do not need to enter defrosting mode.In one embodiment, defrosting mode can run a period of time of specifying.In another embodiment, defrosting mode can run, and controller can continue to determine whether there is frost conditions, and when no longer there is frost conditions, exits defrosting mode.
If 605 places do not exist frost conditions, controller determines whether there is pressure controlling condition at 615 places.Pressure controlling condition can be, such as, based on the suction pressure, the discharge pressure of compressor discharge outlet, one or more temperature (such as discharging or be provided to the temperature of the heat transfer fluid of compressor from compressor) etc. of compressor suction inlet.If there is pressure controlling condition, controller enters pressure control mode 620.Describe according to Fig. 5 as above, pressure control mode can comprise makes heat transfer fluid flow along path 270A.Similar to the defrosting mode of 610, pressure control mode can be enabled for the outdoor unit with pressure controlling condition, and other outdoor units can continue to run, and not change operator scheme.If there is no pressure control mode, method 600 can be back to 605.When heat pump runs, method 600 can repeat.
In one embodiment, method 600 can be set to monitoring frost conditions (such as at 605 places), instead of pressure controlling condition (such as at 615 places).In another embodiment, method 600 can be set to monitor force controlled condition (such as at 615 places), instead of frost conditions (such as at 605 places).Whether this is passable, such as, be set to comprise Stress control flow path based on one or more outdoor unit.
Fig. 7 illustrate according to an embodiment, for controlling heat pump (heat pump 100 of such as Fig. 1) (see the detailed explanation of above Fig. 3 to heating mode) method of running in its heating mode.Method 700 determines, when heat pump runs in its heating mode, whether frost conditions or pressure controlling condition to occur usually.In response to frost conditions or pressure controlling condition, method 700 comprises the operator scheme of heat pump is changed to defrosting mode (see the detailed explanation of above Fig. 4 to defrosting mode) or pressure control mode (see the detailed explanation of above Fig. 5 to pressure control mode) respectively.
When controller determines the operator scheme of one or more outdoor units of heat pump, method 700 starts 705.710, controller determines whether the operator scheme determined at 705 places is heating mode.If one or more outdoor unit does not run in its heating mode, then method 700 is back to 705, and the one or more outdoor unit of continuation monitoring enters heating mode.If at 710 places, controller determines that one or more outdoor unit runs in its heating mode, and method 700 proceeds to 715.
At 715 places, controller determines whether there is frost conditions.Frost conditions can comprise various instruction, and the outdoor heat converter showing in one or more outdoor unit forms frost.If there is frost conditions, corresponding unit will enter defrosting mode at 720 places.In one embodiment, defrosting mode can run and specify a period of time.In another embodiment, defrosting mode can run, and controller can continue to determine whether there is frost conditions, and exits defrosting mode when no longer there is frost conditions.
If there is not frost conditions 715, controller determines whether there is pressure controlling condition 725.Pressure controlling condition can be, such as, based on suction pressure, discharge pressure, one or more temperature etc.If there is pressure controlling condition, controller enters pressure control mode 730.Describe according to Fig. 5 as above, pressure control mode can comprise makes heat transfer fluid flow along path 270A.If there is no pressure control mode, method 700 can be back to 705.When heat pump runs, method 700 can repeat.
In one embodiment, method 700 can be set to monitoring frost conditions (such as at 715 places), instead of pressure controlling condition (such as at 725 places).In another embodiment, method 700 can be set to monitor force controlled condition (such as at 725 places), instead of frost conditions (such as at 715 places).Whether this is passable, such as, be set to comprise Stress control flow path based on one or more outdoor unit.
Aspect
Can notice, any one in aspect 1-6 can combine with any one in aspect 7-12,13-17 and 18-22.Any one in aspect 7-12 can with aspect 13-17, and any one in 18-22 combines.Any one in aspect 13-17 can combine with any one in aspect 18-22.
Aspect 1
A kind of heat pump, comprising:
Multiple outdoor unit, the plurality of outdoor unit is communicated with one or more indoor unit fluid by heat transfer circuit, under each in described multiple outdoor unit may operate at multiple operator scheme;
First in described multiple outdoor unit comprises:
Compressor, first flow control device, this first flow control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and second amount control device, wherein in the first state, described first flow control device allows the stream flowing to described outdoor heat converter, and in the second state, described first flow control device allows the stream flowing to described second amount control device; And
Second in described multiple outdoor unit comprises:
Compressor, first flow control device, this first flow control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and second amount control device, wherein in the first state, described first flow control device allows the stream flowing to described outdoor heat converter, and in the second state, described first flow control device allows the stream flowing to described second amount control device;
The described second amount control device of first in wherein said multiple outdoor unit and second be single can be controlled, so that first of described multiple outdoor unit and/or second are set as defrosting mode.
Aspect 2
Heat pump according to aspect 1, wherein said multiple operator scheme comprises refrigeration mode, heating mode, defrosting mode and pressure control mode.
Aspect 3
Heat pump according to any one of aspect 1-2, wherein when being in defrosting mode and the described first flow control device of first in described multiple outdoor unit is in the first state, the described second amount control device of first in described multiple outdoor unit prevents high pressure heat transfer fluid from flowing into the suction side of the described compressor of first of described multiple outdoor unit.
Aspect 4
Heat pump according to any one of aspect 1-3, wherein when being in defrosting mode and the described first flow control device of second in described multiple outdoor unit is in the first state, the described second amount control device of second in described multiple outdoor unit prevents high pressure heat transfer fluid from flowing into the suction side of the described compressor of second of described multiple outdoor unit.
Aspect 5
Heat pump according to any one of aspect 1-4, in wherein said multiple outdoor unit described first and described second may operate at different operation modes under.
Aspect 6
Heat pump according to any one of aspect 1-5, also comprises defrosting flow path, and wherein said defrosting flow path comprises subcooler between described one or more indoor unit and described outdoor heat converter and expansion gear.
Aspect 7
A kind of heat pump, comprising:
Multiple outdoor unit, the plurality of outdoor unit is communicated with one or more indoor unit fluid by heat transfer circuit, under each in described multiple outdoor unit may operate at multiple operator scheme;
First in described multiple outdoor unit comprises:
Compressor, volume control device and Stress control flow path, described volume control device on the first flow direction between compressor and outdoor heat converter, on the second flow direction between described compressor and one or more indoor unit, wherein said Stress control flow path is arranged between described volume control device and described one or more indoor unit, in the first state, described volume control device allows the stream flowing to described outdoor heat converter, in the second state, described volume control device allows the stream flowing to described one or more indoor unit, and
Second of described multiple outdoor unit comprises:
Compressor, volume control device and Stress control flow path, described volume control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and one or more indoor unit, wherein said Stress control flow path is arranged between described volume control device and described one or more indoor unit, in the first state, described volume control device allows the stream flowing to described outdoor heat converter, in the second state, described volume control device allows the stream flowing to described one or more indoor unit,
In wherein said multiple outdoor unit described first and the described Stress control flow path of described second be single can be controlled, optionally to enable and/or to forbid the pressure control mode of described first and/or described second in described multiple outdoor unit.
Aspect 8
Heat pump according to aspect 7, temperature wherein in response at least one suction pressure of described compressor and the coil in the middle of described outdoor heat converter of being brought down below suction pressure threshold value is brought down below temperature threshold, optionally enables described Stress control flow path.
Aspect 9
Heat pump according to any one of aspect 7-8, wherein in response to the discharge pressure of the described compressor higher than discharge pressure threshold value, optionally enables described Stress control flow path.
Aspect 10
Heat pump according to any one of aspect 7-8, the temperature of at least one suction pressure in response to the described compressor higher than described suction pressure threshold value and the coil in the middle of described outdoor heat converter higher than described temperature threshold, optionally forbids described Stress control flow path.
Aspect 11
Heat pump according to aspect 9, wherein in response to the described discharge pressure of the described compressor lower than described discharge pressure threshold value, optionally forbids described Stress control flow path.
Aspect 12
Heat pump according to any one of aspect 7-11, wherein by setting second amount control device to allow to flow through this second amount control device, optionally enables described Stress control flow path.
Aspect 13
Control the method for heat pump, wherein said heat pump comprises multiple outdoor unit, and each in described multiple outdoor unit at least comprises compressor and outdoor heat converter, and described method comprises:
Determine whether there is frost conditions;
In response to the determination existed frost conditions, first of setting in described multiple outdoor unit runs in defrost mode; With second that individually runs under identical or different operator scheme in described multiple outdoor unit.
Aspect 14
Method according to aspect 13, wherein also comprises:
One or more in response in the described multiple outdoor unit run in its heating mode, carry out describedly determining.
Aspect 15
Method according to any one of aspect 13-14, first of wherein setting in described multiple outdoor unit comprises the suction side preventing high pressure heat transfer fluid from flowing into described compressor in defrost mode.
Aspect 16
Method according to any one of aspect 13-15, first of wherein setting in described multiple outdoor unit runs in defrost mode and comprises the capacity reducing described compressor.
Aspect 17
Method according to aspect 16, the capacity wherein reducing described compressor comprises the speed reducing described compressor.
Aspect 18
Control a method for heat pump, wherein said heat pump comprises multiple outdoor unit, and each in described multiple outdoor unit at least comprises compressor and outdoor heat converter, and described method comprises:
Determine whether there is pressure controlling condition;
In response to the determination existed pressure controlling condition, first of setting in described multiple outdoor unit runs in the pressure control mode; With
Second in described multiple outdoor unit is individually run under identical or different operator scheme.
Aspect 19
Method according to aspect 18, also comprises:
Described confirmation is carried out in response to one or more in the described multiple outdoor unit run in its heating mode.
Aspect 20
Method according to any one of aspect 18-19, first of wherein setting in described multiple outdoor unit runs to comprise in the pressure control mode and enables Stress control flow path, is transferred to described outdoor heat converter to make a part for the heat transfer fluid flowing to one or more indoor unit by subtracting stream device.
Aspect 21
Method according to any one of aspect 18-20, wherein determine whether there is pressure controlling condition to comprise and at least determine one of following situation: whether suction pressure is lower than suction pressure threshold value, and whether the temperature of coil in the middle of described outdoor heat converter is lower than temperature threshold.
Aspect 22
Method according to any one of aspect 18-21, wherein determines whether there is pressure controlling condition and comprises and determine that whether discharge pressure is higher than discharge pressure threshold value.
The term used in description is intended to describe specific embodiment, is not limited to object.Term " one " and " described " comprise its plural form, unless explicitly stated otherwise.The term used in description " comprises " illustrating and there are described feature, entirety, step, operation, element and/or parts, but does not get rid of the existence of other one or more features, entirety, step, operation, element and/or parts.
About description above, be understandable that under the prerequisite not departing from scope, can details be changed, particularly used structural material and the shape of parts, size and/or setting.The word " embodiment " used in description can refer to identical embodiment, but must not refer to identical embodiment.The description described and embodiment are only exemplary.Under the prerequisite not departing from base region, can design other and further embodiment, protection scope of the present invention and spirit are defined by the claims.
Claims (9)
1. the variable refrigerant heat pump with independent defrosting, comprising:
Multiple outdoor unit, the plurality of outdoor unit is communicated with one or more indoor unit fluid by heat transfer circuit, under each in described multiple outdoor unit may operate at multiple operator scheme;
First in described multiple outdoor unit comprises:
Compressor, first flow control device, this first flow control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and second amount control device, wherein in the first state, described first flow control device allows the stream flowing to described outdoor heat converter, and in the second state, described first flow control device allows the stream flowing to described second amount control device; And
Second in described multiple outdoor unit comprises:
Compressor, first flow control device, this first flow control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and second amount control device, wherein in the first state, described first flow control device allows the stream flowing to described outdoor heat converter, and in the second state, described first flow control device allows the stream flowing to described second amount control device;
It is characterized in that, the described second amount control device of first in described multiple outdoor unit and second be single can be controlled, so that first of described multiple outdoor unit and/or second are set as defrosting mode.
2. heat pump according to claim 1, it is characterized in that, when being in defrosting mode and the described first flow control device of first in described multiple outdoor unit is in the first state, the described second amount control device of first in described multiple outdoor unit prevents high pressure heat transfer fluid from flowing into the suction side of the described compressor of first in described multiple outdoor unit.
3. heat pump according to claim 1, it is characterized in that, when being in defrosting mode and the described first flow control device of second in described multiple outdoor unit is in the first state, the described second amount control device of second in described multiple outdoor unit prevents high pressure heat transfer fluid from flowing into the suction side of the described compressor of second of described multiple outdoor unit.
4. heat pump according to claim 1, is characterized in that, in described multiple outdoor unit described first and described second may operate at different operation modes under.
5. heat pump according to claim 1, also comprises defrosting flow path, it is characterized in that, described defrosting flow path comprises and is arranged on subcooler between described one or more indoor unit and described outdoor heat converter and expansion gear.
6. the variable refrigerant heat pump with independent defrosting, comprising:
Multiple outdoor unit, the plurality of outdoor unit is communicated with one or more indoor unit fluid by heat transfer circuit, under each in described multiple outdoor unit may operate at multiple operator scheme;
First in described multiple outdoor unit comprises:
Compressor, volume control device and Stress control flow path, described volume control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and one or more indoor unit, wherein said Stress control flow path is arranged between described volume control device and described one or more indoor unit, in the first state, described volume control device allows the stream flowing to described outdoor heat converter, in the second state, described volume control device allows the stream flowing to described one or more indoor unit, and
Second of described multiple outdoor unit comprises:
Compressor, volume control device and Stress control flow path, described volume control device on the first flow direction between described compressor and outdoor heat converter, on the second flow direction between described compressor and one or more indoor unit, wherein said Stress control flow path is arranged between described volume control device and described one or more indoor unit, in the first state, described volume control device allows the stream flowing to described outdoor heat converter, in the second state, described volume control device allows the stream flowing to described one or more indoor unit,
It is characterized in that, in described multiple outdoor unit described first and the described Stress control flow path of described second be single can be controlled, optionally to enable and/or to forbid the pressure control mode of described first and/or described second in described multiple outdoor unit.
7. heat pump according to claim 6, it is characterized in that, optionally enable described Stress control flow path in response to following at least one item: be brought down below at least one suction pressure of the described compressor of suction pressure threshold value, be brought down below the discharge pressure of the temperature of coil in the middle of described outdoor heat converter of temperature threshold and the described compressor higher than discharge pressure threshold value.
8. heat pump according to claim 7, it is characterized in that, optionally forbid described Stress control flow path in response to following at least one item: higher than at least one suction pressure of the described compressor of described suction pressure threshold value, the described discharge pressure higher than the temperature of coil in the middle of described outdoor heat converter of described temperature threshold and the described compressor lower than described discharge pressure threshold value.
9. heat pump according to claim 7, is characterized in that, by setting second amount control device to allow to flow through this second amount control device, optionally enables described Stress control flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520250417.3U CN205002278U (en) | 2014-04-23 | 2015-04-23 | Variable refrigerant heat pump system of independent defrosting in area |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| WOPCT/CN2014/076026 | 2014-04-23 | ||
| PCT/CN2014/076026 WO2015161461A1 (en) | 2014-04-23 | 2014-04-23 | Variable refrigerant hvac system with individual defrost |
| CN201520250417.3U CN205002278U (en) | 2014-04-23 | 2015-04-23 | Variable refrigerant heat pump system of independent defrosting in area |
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| Publication Number | Publication Date |
|---|---|
| CN205002278U true CN205002278U (en) | 2016-01-27 |
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| CN201520250417.3U Active CN205002278U (en) | 2014-04-23 | 2015-04-23 | Variable refrigerant heat pump system of independent defrosting in area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766333A (en) * | 2017-01-03 | 2017-05-31 | 珠海格力电器股份有限公司 | A kind of low-temperature air injection enthalpy increasing air-conditioning system |
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2015
- 2015-04-23 CN CN201520250417.3U patent/CN205002278U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766333A (en) * | 2017-01-03 | 2017-05-31 | 珠海格力电器股份有限公司 | A kind of low-temperature air injection enthalpy increasing air-conditioning system |
| CN106766333B (en) * | 2017-01-03 | 2023-08-22 | 珠海格力电器股份有限公司 | Low-temperature jet enthalpy-increasing air conditioning system |
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