CN106440433A - Efficient air conditioning unit with multiple refrigerant loops - Google Patents

Efficient air conditioning unit with multiple refrigerant loops Download PDF

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Publication number
CN106440433A
CN106440433A CN201610864144.0A CN201610864144A CN106440433A CN 106440433 A CN106440433 A CN 106440433A CN 201610864144 A CN201610864144 A CN 201610864144A CN 106440433 A CN106440433 A CN 106440433A
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China
Prior art keywords
circulation
refrigerant
double
conditioning unit
air conditioning
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CN201610864144.0A
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Chinese (zh)
Inventor
曹祥
张子杨
张春路
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Tongji University
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Tongji University
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Priority to CN201610864144.0A priority Critical patent/CN106440433A/en
Publication of CN106440433A publication Critical patent/CN106440433A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00Compression machines, plants or systems with non-reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00Compressor arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof

Abstract

The invention relates to an efficient air conditioning unit with multiple refrigerant loops. The efficient air conditioning unit comprises an outdoor heat exchanger with multiple refrigerant flow paths, an indoor heat exchanger with multiple refrigerant flow paths, a plurality of compressors and a plurality of refrigerant circulating throttling devices, wherein the outdoor heat exchanger with the multiple refrigerant flow paths is equipped with a plurality of refrigerant channels; the indoor heat exchanger with the multiple refrigerant flow paths is equipped with a plurality of refrigerant channels; and one refrigerant channel of the outdoor heat exchanger with multiple refrigerant flow paths, one compressor, one refrigerant channel of the indoor heat exchanger with multiple refrigerant flow paths, and one circulating throttling device separately communicate to form a plurality of refrigerant circulating loops. Compared with the prior art, the efficient air conditioning unit has the advantages that by increasing quantity of refrigerant loops in the air conditioning unit, a plurality of condensing temperatures and evaporating temperatures, which have certain temperature gradient, are created, non-uniformity of heat exchange temperature difference is improved, and efficiency of a steam compression air conditioning unit is improved.

Description

There is the efficiently air conditioning unit of many refrigerant loops
Technical field
The present invention relates to a kind of steam compression type refrigerating/heat pump air conditioner unit, especially relate to one kind and there are many cold-producing mediums Loop efficiently air conditioning unit.
Background technology
Constantly lifted with living standard, air conditioning electricity consumption rises continuously and healthily, the accounting in building energy consumption has been at present More than four one-tenth.It is currently based on the air conditioning unit most widely used of vapor-compression cycle.
Vapour compression-type air conditioner group primary structure includes compressor, condenser, vaporizer, throttling arrangement.It is worked Cheng Wei:The liquid refrigerant of low-temp low-pressure, absorbs heat from low-temperature heat source first in vaporizer and is gasificated into low-pressure steam.Then make Refrigerant gas are all compressed into the steam of High Temperature High Pressure in compressor.This high temperature and high pressure gas cools down condensation in condenser Become highly pressurised liquid, discharge heat and heat the air of heat exchanger tube opposite side.Last (as swollen in capillary tube, heating power through restricting element again Swollen valve, electric expansion valve etc.) throttle into low-temp low-pressure liquid refrigerant, so, complete a vapor compression refrigeration/heat pump and follow Ring.Send into room air will in vaporizer cool-down dehumidification, and the air through condenser will take away load and the pressure in room The wasted work of contracting machine.
From the angle of classical thermodynamics, the air conditioning unit loss in efficiency of vapor compression heat pump mostlys come from two aspects, On the one hand it is the irreversible loss that non-isentropic Compression and throttling cause, be on the other hand condenser and vaporizer different transfer of heat process The irreversible loss causing, the loss that latter of which causes is up to 55%.
Different transfer of heat loss is because air is through heat exchange temperature meeting significant changes, but phase transition temperature and pressure correlation Cold-producing medium is difficult to work in coordination with air temperature variations phase.This unmatched temperature change causes local temperature difference bigger than normal, causes greatly 'sLoss;Local temperature difference is less than normal, that is, there is " temperature folder point ", wastes heat exchange area.Therefore, uneven heat transfer temperature difference is limit Make one of major reason of air conditioning unit efficiency.
But improve performance currently without air conditioning unit using this principle.
Content of the invention
The purpose of the present invention is exactly to overcome the defect of above-mentioned prior art presence to provide one kind to have many cold-producing mediums Loop efficiently air conditioning unit.
Based on the prior art in background introduction, the present invention by multiple refrigerant cycle, in vaporizer and condenser Create several Suck and exhaust pressures with certain gradient, thus realize cold-producing medium working in coordination with temperature in heat exchanging process for the air Change, can be effectively improved the uneven of heat transfer temperature difference, reduce irreversible loss.
Simple vapor-compression cycle is constrained by air themperature, need to be compressed to the most all cold-producing mediums from minimum evaporating pressure High condensing pressure, and the pressure ratio of each subcycle can be reduced by multiple refrigerant cycle, thus reducing compressor wasted work, Unit efficiency improves.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of have the efficiently air conditioning unit of many refrigerant loops, including:
Many refrigerant flow paths outdoor heat exchanger:Possess multiple coolant channels and an air duct, multiple cold-producing mediums lead to Road is arranged along before and after air duct direction, wherein the nearly windward side of low-temperature refrigerant passage, and the nearly outlet air surface of high temperature refrigerant passage sets Put;
Many refrigerant flow paths indoor heat exchanger:Possess multiple coolant channels and an air duct, multiple cold-producing mediums lead to Road is arranged along before and after air duct direction, wherein the nearly windward side of high temperature refrigerant passage, and the nearly outlet air surface of low-temperature refrigerant passage sets Put;
Compressor:Freeze in setting number and many refrigerant flow paths outdoor heat exchanger or many refrigerant flow paths indoor heat exchanger Agent channel number is identical;
Refrigerant cycle throttling arrangement:Setting number is indoor with many refrigerant flow paths outdoor heat exchanger or many refrigerant flow paths In heat exchanger, coolant channel number is identical;
One of coolant channel of many refrigerant flow paths outdoor heat exchanger, one of compressor, many cold-producing medium streams It is multiple that one of coolant channel of road indoor heat exchanger, one of refrigerant cycle throttling arrangement are respectively connected with logical formation Refrigerant circulation loop.Each refrigerant circulation loop changes in many refrigerant flow paths outdoor heat exchanger and many refrigerant flow paths interior Form thermograde at hot device, to improve the inhomogeneities of air duct and coolant channel heat transfer temperature difference, improve steam compressed Air conditioning unit efficiency.
Described refrigerant cycle throttling arrangement is selected from capillary tube, short tube, orifice plate, heating power expansion valve or electric expansion valve.
Hereafter in technical scheme and embodiment all by cold-producing medium two circuit air conditioning unit as a example illustrate.But air conditioner In group, the quantity of refrigerant loop is unrestriced, and by increasing and decreasing the quantity of compressor, or the quantity of increase and decrease compresser cylinder is come The quantity changing air conditioning unit middle refrigerant loop belongs within the protection category of this patent.What deserves to be explained is, often The parallel connection compressor quantity of individual refrigerant loop is unrestricted, and the number of units in parallel increasing and decreasing single refrigerant loop inner compressor all belongs to Within the protection category of this patent.
There is the efficiently air conditioning unit inclusion of double refrigerant loops:
Double refrigerant flow path outdoor heat exchangers:Possess high temperature refrigerant passage, low-temperature refrigerant passage and an air to lead to Road, two coolant channels are arranged along before and after air duct direction, the wherein nearly windward side of low-temperature refrigerant passage, high temperature refrigerant The nearly outlet air surface of passage is arranged;
Double refrigerant flow path indoor heat exchangers:Possess high temperature refrigerant passage, low-temperature refrigerant passage and an air to lead to Road, two coolant channels are arranged along before and after air duct direction, the wherein nearly windward side of high temperature refrigerant passage, low-temperature refrigerant The nearly outlet air surface of passage is arranged;
Compressor:Setting 2, respectively first circulation compressor and second circulation compressor;
Refrigerant cycle throttling arrangement:Setting 2, respectively first circulation throttling arrangement and second circulation throttling arrangement;
The high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers, first circulation compressor, double refrigerant flow path room The high temperature refrigerant passage of interior heat exchanger, first circulation throttling arrangement are connected, and form the first circulation of high temperature refrigerant circulation,
The low-temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers, second circulation compressor, double refrigerant flow path room The low-temperature refrigerant passage of interior heat exchanger, second circulation throttling arrangement are connected, and form the second circulation of low-temperature refrigerant circulation.
There is the efficiently air conditioning unit of double refrigerant loops and also include outer blower fan and breeze fan, described double cold-producing medium streams The air duct of road outdoor heat exchanger is connected with ambient outdoor air, and the air being inhaled into first passes through double refrigerant flow path outdoors and changes The low-temperature refrigerant passage of hot device carries out heat exchange, then is carried out by the high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers Heat exchange, after through exogenous wind machine blowout;
The air duct of described double refrigerant flow path indoor heat exchangers is connected with indoor air, needs cool-down dehumidification The high temperature refrigerant passage first passing through double refrigerant flow path indoor heat exchangers is carried out heat exchange by air, then by double refrigerant flow paths The low-temperature refrigerant passage of indoor heat exchanger carries out heat exchange, after through breeze fan blow out send into air-conditioned room.
Further, described double refrigerant flow path outdoor heat exchangers are double condensation temperature condenser.
Further, described double refrigerant flow path indoor heat exchangers are double evaporating temperature vaporizer.
Further, described outer blower fan is condensation fan.
Preferably, there is the efficiently air conditioning unit of double refrigerant loops and also include first circulation four-way change-over valve and second Circulation four-way change-over valve, described first circulation four-way change-over valve is connected with first circulation compressor, and first circulation four-way changes It is used for regulating and controlling the flow direction of cold-producing medium in first circulation to valve, described second circulation four-way change-over valve is with second circulation compressor even Connect, and second circulation four-way change-over valve is used for regulating and controlling the flow direction of cold-producing medium in second circulation, and then, by controlling first circulation four Logical reversal valve to switch refrigeration and heating condition with second circulation four-way change-over valve.
Preferably, described first circulation throttling arrangement includes first circulation and heats throttling arrangement and first circulation refrigeration section Stream device, described second circulation throttling arrangement includes second circulation and heats throttling arrangement and second circulation refrigeration throttling device.
Described second circulation heats throttling arrangement, first circulation heats throttling arrangement, second circulation refrigeration throttling device, First circulation refrigeration throttling device, first circulation throttling arrangement, the choosing independently of second circulation throttling arrangement be selected from capillary tube, The refrigeration system throttling arrangement such as short tube, orifice plate, heating power expansion valve or electric expansion valve.
Preferably, described first circulation compressor is defeated by double cylinder double suction exhaust pressures with second circulation compressor Contracting machine replaces, and described double cylinder double suction pressure at expulsion compressors are to have two disconnected cylinders each other, and two cylinders divide There is no different pressures of inspiration(Pi) and pressure at expulsion, the cylinder connecting with first circulation is first circulation cylinder, with second circulation Connection cylinder be second circulation cylinder, described double cylinder double suction pressure at expulsion compressors can be selected for vapor compression refrigeration machine or Heat pump compressor.
Preferably, first circulation and second circulation can use identical cold-producing medium, it is possible to use different cold-producing mediums.
There is the efficiently air conditioning unit of double refrigerant loops, comprise high temperature circulation and two independent cold-producing mediums of cold cycle Circulate, its work process is:Cold-producing medium in two circulations, in each self-loopa, changes in double refrigerant flow path interiors first respectively Absorb heat from low-temperature heat source successively in hot device high temperature refrigerant passage and low-temperature refrigerant passage, be melted into from the liquid of low-temp low-pressure low Pressure steam.Then refrigerant gas respectively enter first circulation compressor and second circulation compressor, or are directly entered double gas Cylinder double suction pressure at expulsion compressor, is compressed into the steam of High Temperature High Pressure.High temperature and high pressure gas are respectively through each compressor exhaust pipe Respectively enter high temperature refrigerant passage and the low-temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers, cooling condenses into liquid Body, the air of the double refrigerant flow path outdoor heat exchanger heat exchanger tube opposite sides of release heat successively heating.Finally follow through first again Ring throttling arrangement throttles into low-temp low-pressure liquid refrigerant respectively with second circulation throttling arrangement.So, complete cold-producing medium double back The efficiently air conditioning unit refrigerant cycle on road.Meanwhile, the air lowered the temperature first passes through double refrigerant flow path indoor heat exchangers High temperature refrigerant passage carries out heat exchange, then carries out heat exchange by the low-temperature refrigerant passage of double refrigerant flow path indoor heat exchangers, Humiture decline, after through breeze fan blow out send into air-conditioned room;It is outdoor that the air being warmed first passes through double refrigerant flow paths The low-temperature refrigerant passage of heat exchanger carries out heat exchange, then is entered by the high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers Row heat exchange, temperature rise, after through exogenous wind machine blowout.
There is the efficiently air conditioning unit of double refrigerant loops, it is made up of the refrigerant cycle of two independent operatings, refrigeration Agent side does not mutually connect.But two circulate in the air side of heat exchanger in a series arrangement, it is followed successively by air cooling-down or heating.For example double Refrigerant flow path outdoor heat exchanger side, two circulations are used in conjunction with the front and rear part of double refrigerant flow path indoor heat exchangers, The high temperature refrigerant passage that air first passes through double refrigerant flow path indoor heat exchangers carries out heat exchange cooling, then by double cold-producing medium streams The low-temperature refrigerant passage of road indoor heat exchanger carries out heat exchange and is cooled to design temperature further.
The present invention passes through to increase the quantity of air conditioning unit middle refrigerant cycle, and creation is multiple to have the cold of uniform temperature gradient Solidifying temperature and evaporating temperature, improve the inhomogeneities of heat transfer temperature difference, improve steam compressed air conditioning unit efficiency.
Compared with prior art, the present invention possesses advantages below:
1. unit nominal condition efficiency significantly improves.Simulation result shows, under conditions of not increasing heat exchanger, certain name The unit (COP=3.28) of 3 grades of efficiencies of cooling condition GB adopts cold-producing medium double loop to design, and can bring up to 1 grade of efficiency of GB (COP=3.59), efficiency lifting 9.5%, and the efficiency lifting amplitude of the traditional air conditioner unit of 2 grades, 1 grade efficiencies energy is bigger.
2. the not single nominal condition of the present invention, under all kinds of working conditions, energy-saving effect is all very notable, compared with conventional refrigerants Single loop air conditioning unit Annual performance factor APF improves 8.5~13.6%;
3. operability is good, and economy is strong.Only traditional air conditioner unit need to be carried out with appropriate reconstruction and achieve that cold-producing medium is double Loop, cost increases less than 10%, just by three-level efficiency, unit is risen to one-level efficiency.
4. compatibility is strong, and other can be coordinated to improve the technology of unit efficiency, improves efficiency further.
Should state, using being applied to simple vapor compression refrigeration/heat pump cycle (single refrigerant loop inner compressor Provide only the vapor compression refrigeration/heat only existing unique condensing pressure and unique evaporating pressure in unique pressure at expulsion, and circulation Pump circulation) improve the measure of system energy efficiency and stability or improvement that increase and decrease relevant device is carried out to the present invention it is impossible to be considered as right The present invention makes substantial improvements, therefore belongs in this patent protection category.
Brief description
Fig. 1 is to have the two circuit efficient air-conditioning unit structure schematic diagram of cold-producing medium in embodiment 1.
Fig. 2 is to have the two circuit efficient air-conditioning unit structure schematic diagram of cold-producing medium in embodiment 2.
Fig. 3 is to have the two circuit efficient air-conditioning unit structure schematic diagram of cold-producing medium in embodiment 3.
In figure:1 is first circulation compressor, and 2 is second circulation compressor, and 3 is first circulation four-way change-over valve, and 4 is the Two circulation four-way change-over valves, 5 is double refrigerant flow path outdoor heat exchanger, and 6 is outer blower fan, and 7 heat throttling arrangement for second circulation, 8 heat throttling arrangement for first circulation, and 9 is second circulation refrigeration throttling device, and 10 is first circulation refrigeration throttling device, and 11 are Breeze fan, 12 is double refrigerant flow path indoor heat exchanger, and 13 is double cylinder double suction pressure at expulsion compressor, and 14 is first circulation Throttling arrangement, 15 is second circulation throttling arrangement, and remaining is connecting refrigerant lines.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
There is the efficiently air conditioning unit of double refrigerant loops, as shown in figure 1, the double refrigerant flow path outdoor heat exchangers 5 of inclusion, Double refrigerant flow path indoor heat exchangers 12, first circulation compressor 1, second circulation compressor 2, first circulation throttling arrangement 14, Second circulation throttling arrangement 15, outer blower fan 6 and breeze fan 11.
Double refrigerant flow path outdoor heat exchangers 5 possess high temperature refrigerant passage, low-temperature refrigerant passage and an air and lead to Road, two coolant channels are arranged along before and after air duct direction, the wherein nearly windward side of low-temperature refrigerant passage, high temperature refrigerant The nearly outlet air surface of passage is arranged;
Double refrigerant flow path indoor heat exchangers 12 possess high temperature refrigerant passage, low-temperature refrigerant passage and an air and lead to Road, two coolant channels are arranged along before and after air duct direction, the wherein nearly windward side of high temperature refrigerant passage, low-temperature refrigerant The nearly outlet air surface of passage is arranged;
The high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers 5, first circulation compressor 1, double refrigerant flow path The high temperature refrigerant passage of indoor heat exchanger 12, first circulation throttling arrangement 14 are connected, and form the of high temperature refrigerant circulation One circulation,
The low-temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers 5, second circulation compressor 2, double refrigerant flow path The low-temperature refrigerant passage of indoor heat exchanger 12, second circulation throttling arrangement 15 are connected, and form the of low-temperature refrigerant circulation Two circulations.
The air duct of double refrigerant flow path outdoor heat exchangers 5 is connected with ambient outdoor air, and the air being inhaled into first leads to The low-temperature refrigerant passage crossing double refrigerant flow path outdoor heat exchangers 5 carries out heat exchange, then by double refrigerant flow path outdoor heat exchanges The high temperature refrigerant passage of device 5 carries out heat exchange, after blow out through exogenous wind machine 6;
The air duct of double refrigerant flow path indoor heat exchangers 12 is connected with indoor air, needs the air of cool-down dehumidification The high temperature refrigerant passage first passing through double refrigerant flow path indoor heat exchangers 12 is carried out heat exchange, then by double refrigerant flow path rooms The low-temperature refrigerant passage of interior heat exchanger 12 carries out heat exchange, after through breeze fan 11 blow out send into air-conditioned room.
Specifically, double refrigerant flow path outdoor heat exchanger 5 high temperature refrigerant passage end through connecting refrigerant lines 23 with First circulation throttling arrangement 14 entrance is connected, and double refrigerant flow path outdoor heat exchanger 5 high temperature refrigerant passage other ends are through system Cryogen connecting tube 22 is connected with first circulation compressor 1 air vent.
Double refrigerant flow path outdoor heat exchanger 5 low-temperature refrigerant passage end are through connecting refrigerant lines 27 and second circulation section Stream device 15 entrance is connected, and double refrigerant flow path outdoor heat exchanger 5 low-temperature refrigerant passage other ends are through connecting refrigerant lines 26 are connected with second circulation compressor 2 air vent.
Double refrigerant flow path indoor heat exchanger 12 high temperature refrigerant passage end are through connecting refrigerant lines 24 and first circulation Throttling arrangement 14 outlet is connected, and double refrigerant flow path indoor heat exchanger 12 high temperature refrigerant passage other ends connect through cold-producing medium Pipe 21 is connected with first circulation compressor 1 air entry.
Double refrigerant flow path indoor heat exchanger 12 low-temperature refrigerant passage end are through connecting refrigerant lines 28 and second circulation Throttling arrangement 15 outlet is connected, and double refrigerant flow path indoor heat exchanger 12 low-temperature refrigerant passage other ends connect through cold-producing medium Pipe 25 is connected with second circulation compressor 2 air entry.
In the present embodiment, double refrigerant flow path outdoor heat exchangers 5 are double condensation temperature condenser.Double refrigerant flow paths are indoor Heat exchanger 12 is double evaporating temperature vaporizer.Outer blower fan 6 is condensation fan.
In the present embodiment, first circulation throttling arrangement 14 can be selected from capillary tube, short tube, orifice plate, heating power expansion valve or electricity The refrigeration system throttling arrangement such as sub- expansion valve.
In the present embodiment, second circulation throttling arrangement 15 can be selected from capillary tube, short tube, orifice plate, heating power expansion valve or electricity The refrigeration system throttling arrangement such as sub- expansion valve.
The present embodiment unit comprises high temperature circulation and two independent refrigerant cycle of cold cycle, under working state of system It is filled with cold-producing medium (such as freon).
The present embodiment there is the efficiently air conditioning unit of double refrigerant loops, comprise high temperature circulation and cold cycle two solely Vertical refrigerant cycle, its work process is:Two circulation in cold-producing medium in each self-loopa, first respectively in double cold-producing mediums Absorb heat from low-temperature heat source successively in stream indoor heat exchanger 12 high temperature refrigerant passage and low-temperature refrigerant passage, from low-temp low-pressure Liquid chemical conversion low-pressure steam.Then refrigerant gas respectively enter first circulation compressor 1 and second circulation compressor 2, or Person is directly entered double cylinder double suction pressure at expulsion compressors 13, is compressed into the steam of High Temperature High Pressure.High temperature and high pressure gas are respectively Respectively enter the high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers 5 through each compressor exhaust pipe and low-temperature refrigerant leads to Road, cooling condenses into liquid, the sky of the double refrigerant flow path outdoor heat exchanger 5 heat exchanger tube opposite sides of release heat successively heating Gas.Finally throttle into low-temp low-pressure liquid refrigeration through first circulation throttling arrangement 14 respectively with second circulation throttling arrangement 15 again Agent.So, complete the two circuit efficiently air conditioning unit refrigerant cycle of cold-producing medium.Meanwhile, the air lowered the temperature first passes through double The high temperature refrigerant passage of refrigerant flow path indoor heat exchanger 12 carries out heat exchange, then by double refrigerant flow path indoor heat exchangers 12 Low-temperature refrigerant passage carry out heat exchange, humiture declines, after blow out through breeze fan 11 and send into air-conditioned room;It is warmed The low-temperature refrigerant passage that air first passes through double refrigerant flow path outdoor heat exchangers 5 carries out heat exchange, then by double refrigerant flow paths The high temperature refrigerant passage of outdoor heat exchanger 5 carries out heat exchange, and temperature rises, after blow out through exogenous wind machine 6.
There is the efficiently air conditioning unit of double refrigerant loops, it is made up of the refrigerant cycle of two independent operatings, refrigeration Agent side does not mutually connect.
The high temperature refrigerant passage of double refrigerant flow path indoor heat exchangers 12 and low-temperature refrigerant passage are according to air duct Flow direction see it is series connection, first pass around double refrigerant flow path interiors through the air of double refrigerant flow path indoor heat exchangers 12 and change The high temperature refrigerant passage of hot device 12 carries out heat exchange, then the low-temperature refrigerant passage through double refrigerant flow path indoor heat exchangers 12 Carry out heat exchange.The high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers 5 and low-temperature refrigerant passage are according to air duct Flow direction see it is series connection, first pass around double refrigerant flow path outdoors through the air of double refrigerant flow path outdoor heat exchangers 5 and change The high temperature refrigerant passage of hot device 5 carries out heat exchange, then the low-temperature refrigerant passage of the double refrigerant flow path outdoor heat exchangers 5 of process enters Row heat exchange.
Embodiment 2
As shown in Fig. 2 the present embodiment difference from Example 1 is:
In the present embodiment, there is the efficiently air conditioning unit of double refrigerant loops and also include first circulation four-way change-over valve 3 With second circulation four-way change-over valve 4, first circulation four-way change-over valve 3 is connected with first circulation compressor 1, and first circulation four-way Reversal valve 3 is used for regulating and controlling the flow direction of cold-producing medium in first circulation, and second circulation four-way change-over valve 4 is with second circulation compressor 2 even Connect, and second circulation four-way change-over valve 4 is used for regulating and controlling the flow direction of cold-producing medium in second circulation, and then, by controlling first circulation Four-way change-over valve 3 to switch refrigeration and heating condition with second circulation four-way change-over valve 4.
In addition, in the present embodiment, heating throttling arrangement 8 and first circulation refrigeration throttling device using the first circulation of series connection 10, to replace the first circulation throttling arrangement 14 in embodiment 1, heat throttling arrangement 7 using the second circulation of series connection and follow with second Ring refrigeration throttling device 9 is replacing the second circulation throttling arrangement 15 in embodiment 1.
In the present embodiment, second circulation heats throttling arrangement 7, first circulation heats throttling arrangement 8, second circulation refrigeration section Stream device 9, first circulation refrigeration throttling device 10 are respectively selected from electric expansion valve.
Specifically, double refrigerant flow path outdoor heat exchanger 5 high temperature refrigerant passage end through connecting refrigerant lines 28 with First circulation heats throttling arrangement 8 entrance and is connected, first circulation heat throttling arrangement 8 outlet by connecting refrigerant lines 24 with First circulation refrigeration throttling device 10 entrance is connected, double refrigerant flow path outdoor heat exchanger 5 high temperature refrigerant passage other ends It is connected with the first interface of first circulation four-way change-over valve 3 through connecting refrigerant lines 27, the second of first circulation four-way change-over valve 3 Interface is connected with first circulation compressor 1 air vent by connecting refrigerant lines 26.
Double refrigerant flow path outdoor heat exchanger 5 low-temperature refrigerant passage end are through connecting refrigerant lines 33 and second circulation system Thermal throttle device 7 entrance is connected, and second circulation heats throttling arrangement 7 outlet by connecting refrigerant lines 23 and second circulation system Cold throttling arrangement 9 entrance is connected, and double refrigerant flow path outdoor heat exchanger 5 low-temperature refrigerant passage other ends connect through cold-producing medium Pipe 32 is connected with the first interface of second circulation four-way change-over valve 4, and the second interface of second circulation four-way change-over valve 4 passes through refrigeration Agent connecting tube 31 is connected with second circulation compressor 2 air vent.
Double refrigerant flow path indoor heat exchanger 12 high temperature refrigerant passage end are through connecting refrigerant lines 29 and first circulation Refrigeration throttling device 10 outlet is connected, and double refrigerant flow path indoor heat exchanger 12 high temperature refrigerant passage other ends are through cold-producing medium Connecting tube 21 is connected with the 3rd interface of first circulation four-way change-over valve 3, and the 4th interface of first circulation four-way change-over valve 3 passes through Connecting refrigerant lines 25 are connected with first circulation compressor 1 air entry.
Double refrigerant flow path indoor heat exchanger 12 low-temperature refrigerant passage end are through connecting refrigerant lines 34 and second circulation Refrigeration throttling device 9 outlet is connected, and double refrigerant flow path indoor heat exchanger 12 low-temperature refrigerant passage other ends are through cold-producing medium Connecting tube 22 is connected with the 3rd interface of second circulation four-way change-over valve 4, and the 4th interface of second circulation four-way change-over valve 4 passes through Connecting refrigerant lines 30 are connected with second circulation compressor 2 air entry.
Compared with traditional split-type air conditioner unit, its in appearance maximum be characterised by, connect indoor set and off-premises station Connecting refrigerant lines quantity increases to 4, is distributed as connecting refrigerant lines 21,22,23,24.
Under cooling condition, first circulation is high temperature circulation, and second circulation is cold cycle, double refrigerant flow path outdoor heat exchanges Device 5 is condenser, and double refrigerant flow path indoor heat exchangers 12 are vaporizer, and first circulation heats throttling arrangement 8 and second circulation Heat throttling arrangement 7 and keep standard-sized sheet, its refrigeration work flow process is similar to Example 1.
Under heating condition, first circulation is cold cycle, and second circulation is high temperature circulation, double refrigerant flow path outdoor heat exchanges Device 12 is condenser, and double refrigerant flow path indoor heat exchangers 5 are vaporizer, first circulation refrigeration throttling device 10 and second circulation Refrigeration throttling device 9 keeps standard-sized sheet.It heats, and workflow is similar with refrigeration work flow process, and cold-producing medium is compressed discharge and each follows After the compressor of ring, first after condensed device release heat, then warp knuckle stream enters vaporizer heat absorption, returns the compression of each self-loopa Machine.
Refrigeration and the switching of heating condition, are realized by first circulation four-way change-over valve 3, second circulation four-way change-over valve 4.
Embodiment 3
As shown in figure 3, the present embodiment difference from Example 2 is:
In the present embodiment, first circulation compressor 1 is defeated by double cylinder double suction exhaust pressures with second circulation compressor 2 Contracting machine 13 replaces, and double cylinder double suction pressure at expulsion compressors 13 are to have two disconnected cylinders each other, and two cylinders are respectively There is different pressures of inspiration(Pi) and pressure at expulsion, the cylinder connecting with first circulation is first circulation cylinder, with second circulation even Logical cylinder is second circulation cylinder, and double cylinder double suction pressure at expulsion compressors 13 can be selected for vapor compression refrigeration machine or heat pump pressure Contracting machine.
Compared with Example 2, using double cylinder double suction pressure at expulsion compressors 13 substituted for first circulation compressor 1, Two recycle compressors 2, with simplied system structure.
All parts in refrigerant cycle and air channel are not completely shown, in implementation process, in cold-producing medium in above-described embodiment Loop setting high-pressure reservoir, gas-liquid separator, separating of oil, the common refrigeration auxiliary such as filter, exsiccator, were arranged in air channel Filter, acoustic filter, humidifier, heater, the air-treatment adnexa such as sterilizing unit, from different blow spray nozzles and air return grille Grid, change blower fan position, or the spirit increase heat exchanger without departing from technical solution of the present invention, blower fan and air-valve etc., all can not It is considered as having carried out substantial improvements to the present invention, the scope of the present invention should be belonged to.
Herein schematic diagram is all taking finned tube exchanger as a example, in implementation process, without departing from technical solution of the present invention Change species and the form of heat exchanger, such as spiritually using micro-channel heat exchanger, calandria heat exchanger, plate type heat exchanger, shell Pipe heat exchanger, all can not be considered as having carried out substantial improvements to the present invention.
Limiting part, those skilled in the art should know the word such as " first " used herein, " second ":" the One ", the use of the word such as " second " is intended merely to facilitate and in description, part is distinguished.As not having outside Stated otherwise, on Predicate language does not have special implication.
Finally it should be noted that:Above example is only not intended to limit in order to technical scheme to be described, to the greatest extent Pipe has been described in detail to the present invention with reference to preferred embodiment, and those of ordinary skill in the art still can be to this Bright specific embodiment is modified or is carried out equivalent to some technical characteristics, but as long as without departing from the technology of the present invention The spirit of scheme, it all should be covered in the middle of the technical scheme scope that the present invention is claimed.

Claims (10)

1. a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that including:
Many refrigerant flow paths outdoor heat exchanger:Possess multiple coolant channels and an air duct, multiple coolant channel edges Arrange before and after air duct direction, the wherein nearly windward side of low-temperature refrigerant passage, the nearly outlet air surface of high temperature refrigerant passage is arranged;
Many refrigerant flow paths indoor heat exchanger:Possess multiple coolant channels and an air duct, multiple coolant channel edges Arrange before and after air duct direction, the wherein nearly windward side of high temperature refrigerant passage, the nearly outlet air surface of low-temperature refrigerant passage is arranged;
Compressor:Setting number is led to cold-producing medium in many refrigerant flow paths outdoor heat exchanger or many refrigerant flow paths indoor heat exchanger Road number is identical;
Refrigerant cycle throttling arrangement:Setting number and many refrigerant flow paths outdoor heat exchanger or the interior heat exchange of many refrigerant flow paths In device, coolant channel number is identical;
One of coolant channel of many refrigerant flow paths outdoor heat exchanger, one of compressor, many refrigerant flow paths room One of coolant channel of interior heat exchanger, one of refrigerant cycle throttling arrangement are respectively connected with the multiple refrigeration of logical formation Agent closed circuit.
2. according to claim 1 a kind of have many refrigerant loops efficiently air conditioning unit it is characterised in that described Refrigerant cycle throttling arrangement is selected from capillary tube, short tube, orifice plate, heating power expansion valve or electric expansion valve.
3. according to claim 1 a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that having many The efficiently air conditioning unit of refrigerant loop specially has the efficiently air conditioning unit of double refrigerant loops, has double refrigerant loops Efficiently air conditioning unit inclusion:
Double refrigerant flow path outdoor heat exchangers (5):Possess high temperature refrigerant passage, low-temperature refrigerant passage and an air to lead to Road, two coolant channels are arranged along before and after air duct direction, the wherein nearly windward side of low-temperature refrigerant passage, high temperature refrigerant The nearly outlet air surface of passage is arranged;
Double refrigerant flow path indoor heat exchangers (12):Possess high temperature refrigerant passage, low-temperature refrigerant passage and an air to lead to Road, two coolant channels are arranged along before and after air duct direction, the wherein nearly windward side of high temperature refrigerant passage, low-temperature refrigerant The nearly outlet air surface of passage is arranged;
Compressor:Setting 2, respectively first circulation compressor (1) and second circulation compressor (2);
Refrigerant cycle throttling arrangement:Setting 2, respectively first circulation throttling arrangement (14) and second circulation throttling arrangement (15);
The high temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers (5), first circulation compressor (1), double refrigerant flow path The high temperature refrigerant passage of indoor heat exchanger (12), first circulation throttling arrangement (14) are connected, and form high temperature refrigerant circulation First circulation,
The low-temperature refrigerant passage of double refrigerant flow path outdoor heat exchangers (5), second circulation compressor (2), double refrigerant flow path The low-temperature refrigerant passage of indoor heat exchanger (12), second circulation throttling arrangement (15) are connected, and form low-temperature refrigerant circulation Second circulation.
4. according to claim 3 a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that for tool Have double refrigerant loops efficiently air conditioning unit for, also include outer blower fan (6) and breeze fan (11),
The air duct of described double refrigerant flow path outdoor heat exchangers (5) is connected with ambient outdoor air, the air being inhaled into The low-temperature refrigerant passage first passing through double refrigerant flow path outdoor heat exchangers (5) carries out heat exchange, then by double refrigerant flow path rooms The high temperature refrigerant passage of external heat exchanger (5) carries out heat exchange, after through exogenous wind machine (6) blowout;
The air duct of described double refrigerant flow path indoor heat exchangers (12) is connected with indoor air, needs cool-down dehumidification The high temperature refrigerant passage first passing through double refrigerant flow path indoor heat exchangers (12) is carried out heat exchange by air, then by double cold-producing mediums The low-temperature refrigerant passage of stream indoor heat exchanger (12) carries out heat exchange, after through breeze fan (11) blow out send into air-conditioned room Between.
5. according to claim 3 a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that for tool Have double refrigerant loops efficiently air conditioning unit for, described double refrigerant flow path outdoor heat exchangers (5) are double condensation temperatures Condenser, described double refrigerant flow path indoor heat exchangers (12) are double evaporating temperature vaporizer.
6. according to claim 3 a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that for tool Have double refrigerant loops efficiently air conditioning unit for, also include first circulation four-way change-over valve (3) and second circulation four-way Reversal valve (4), described first circulation four-way change-over valve (3) is connected with first circulation compressor (1), and first circulation four-way changes It is used for regulating and controlling the flow direction of cold-producing medium in first circulation, described second circulation four-way change-over valve (4) and second circulation pressure to valve (3) Contracting machine (2) connects, and second circulation four-way change-over valve (4) is used for regulating and controlling the flow direction of cold-producing medium in second circulation, by controlling the One circulation four-way change-over valve (3) to switch refrigeration and heating condition with second circulation four-way change-over valve (4).
7. according to claim 3 a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that for tool Have double refrigerant loops efficiently air conditioning unit for, described first circulation throttling arrangement (14) includes first circulation and heats section Stream device (8) and first circulation refrigeration throttling device (10), described second circulation throttling arrangement (15) includes second circulation system Thermal throttle device (7) and second circulation refrigeration throttling device (9).
8. a kind of according to claim 3 or 7 have many refrigerant loops efficiently air conditioning unit it is characterised in that right In have double refrigerant loops efficiently air conditioning unit for, described second circulation heats throttling arrangement (7), first circulation system Thermal throttle device (8), second circulation refrigeration throttling device (9), first circulation refrigeration throttling device (10), first circulation throttling dress Put (14), second circulation throttling arrangement (15) is independently selected from capillary tube, short tube or electric expansion valve.
9. according to claim 3 a kind of have the efficiently air conditioning unit of many refrigerant loops it is characterised in that for tool Have double refrigerant loops efficiently air conditioning unit for, described first circulation compressor (1) and second circulation compressor (2) by One double cylinder double suction pressure at expulsion compressor (13) replaces, and described double cylinders double suction pressure at expulsion compressor (13) are to have Two disconnected cylinders each other, two cylinders are respectively provided with different pressures of inspiration(Pi) and pressure at expulsion, and described double cylinders are double Suck and exhaust pressure compressor (13) selects vapor compression refrigeration machine or heat pump compressor.
10. according to claim 3 a kind of there is the efficiently air conditioning unit of many refrigerant loops it is characterised in that for Have double refrigerant loops efficiently air conditioning unit for, first circulation and second circulation use identical cold-producing medium or different Cold-producing medium.
CN201610864144.0A 2016-09-29 2016-09-29 Efficient air conditioning unit with multiple refrigerant loops Pending CN106440433A (en)

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CN106802010A (en) * 2017-03-19 2017-06-06 北京工业大学 The multiple circuit heat pump that a kind of heat exchange coil is stacked successively
CN107859623A (en) * 2017-10-23 2018-03-30 珠海格力节能环保制冷技术研究中心有限公司 Compressor and refrigeration system and air conditioner
CN109000389A (en) * 2017-11-03 2018-12-14 株式会社电装 Condenser and the refrigeration system for having the condenser
CN109520091A (en) * 2018-11-22 2019-03-26 广东美的制冷设备有限公司 Refrigerating plant cooling control method and device, refrigerating plant and storage medium
CN111120316A (en) * 2018-10-31 2020-05-08 上海海立电器有限公司 Compressor and air conditioning system
CN113465060A (en) * 2021-07-02 2021-10-01 广东海悟科技有限公司 Heat exchanger

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CN104515317A (en) * 2014-12-09 2015-04-15 重庆美的通用制冷设备有限公司 Water-cooling water chilling unit
CN204963285U (en) * 2015-08-28 2016-01-13 南京谷德埃涤环境科技有限公司 Two energy -conserving refrigerating system of double gas compressor that admit air

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CN203496911U (en) * 2013-10-17 2014-03-26 山东赛通电器有限公司 Frequency-conversion dual-system air conditioner for locomotive
CN203771771U (en) * 2014-02-28 2014-08-13 深圳麦克维尔空调有限公司 Air-conditioning unit and air heat exchanger
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106802010A (en) * 2017-03-19 2017-06-06 北京工业大学 The multiple circuit heat pump that a kind of heat exchange coil is stacked successively
CN107859623A (en) * 2017-10-23 2018-03-30 珠海格力节能环保制冷技术研究中心有限公司 Compressor and refrigeration system and air conditioner
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CN109000389A (en) * 2017-11-03 2018-12-14 株式会社电装 Condenser and the refrigeration system for having the condenser
CN111120316A (en) * 2018-10-31 2020-05-08 上海海立电器有限公司 Compressor and air conditioning system
CN109520091A (en) * 2018-11-22 2019-03-26 广东美的制冷设备有限公司 Refrigerating plant cooling control method and device, refrigerating plant and storage medium
CN113465060A (en) * 2021-07-02 2021-10-01 广东海悟科技有限公司 Heat exchanger

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Application publication date: 20170222