CN106288127A - Central air-conditioner cooling water intelligent processing method and system thereof - Google Patents
Central air-conditioner cooling water intelligent processing method and system thereof Download PDFInfo
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- CN106288127A CN106288127A CN201510239272.1A CN201510239272A CN106288127A CN 106288127 A CN106288127 A CN 106288127A CN 201510239272 A CN201510239272 A CN 201510239272A CN 106288127 A CN106288127 A CN 106288127A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
A kind of central air-conditioner cooling water intelligent processing method and system thereof, dedicated fresh air air conditioning system includes total-heat exchanger, water-loop heat pump Fresh air handling units, induction diffuser, pipeline connects；Water-loop heat pump as Fresh air handling units includes finned tube evaporator, compressor, board-like water-cooled condenser (or telescoping water-cooling condenser), electric expansion valve, centrifugal fan and self controlled element；The chilled(cooling) water return (CWR) parallel connection of the multiple stage water-loop heat pump in system is formed water ring, finned tube evaporator is redesigned and is allowed to be suitable for dedicated fresh air air conditioning system low temperature big enthalpy difference Fresh air handing, use electric expansion valve to add automatic control components and parts and new wind air-out is controlled at about 7 DEG C；The present invention is that dedicated fresh air air conditioning system provides a kind of installation and Fresh air handling units flexible and convenient to use, and makes whole air conditioning system have the most energy-saving and cost-reducing characteristic, and indoor air quality is high.
Description
Technical field
The present invention relates to a kind of dedicated fresh air air conditioning system, refer in particular to its Fresh air handling units and use the air conditioning system of water-loop heat pump.
Background technology
Dedicated fresh air air conditioning system refers to a kind of all fresh air air-conditioning system, Fresh air handling units uses cold air distribution unit, in addition to undertaking new wind load, also undertake indoor all latent heat loads and part sensible heat load or complete sensible heat load, achieve sensible heat load and latent heat load separately process in air conditioning area, condensed water is not had to produce in air conditioning area, it is achieved that air-conditioner tail end equipment dry cooling condition runs, and dedicated outdoor air system is otherwise known as " dry coil system " the most sometimes.
Dedicated fresh air air conditioning system is compared with the all-air system of conventional belt return air, eliminate return air, but the air that air conditioning terminal (such as the fan coil 3 of Fig. 1) processes remains indoor return air, the return air in the most each room will not cross-mixing, it is to avoid pollution and infectious disease are propagated.The energy of air draft is reclaimed by total-heat exchanger 5, has energy-saving significance；And outside the air draft of all-air system typically directly discharge chamber, do not reclaimed.Further, since resh air requirement is far fewer than the air output of all-air system, air duct blow energy consumption is little, so dedicated fresh air air conditioning system had both had provides the feature of excellent air quality, has again the most energy-saving and cost-reducing characteristic.
Building energy conservation is one of dose necessary of Building technology progress, and in the building air conditioning total energy consumption whole year, novel wind energy consumption accounts for 15%～24%, i.e. the 1/6 to 1/5 of the air-conditioning energy consumption whole year to be used for processing new wind.Along with indoor air quality is required more and more higher by people, design outdoor air ventilation rate has been increased to original 2～4 times by U.S. heating refrigerating conditioner engineering Shi Xuehui standard, China's national standard has been also carried out amendment to ventilation, and resh air requirement increase will be further increased building energy consumption.
Dedicated fresh air air conditioning system has the most energy-saving and cost-reducing characteristic, being classified as one of 21 century commercial building 15 air conditioner energy saving technology the most promising, state-of-the-art by USDOE, its technical energy-saving potential index is number three in these 15 air conditioner energy saving technology.
Water-loop heat pump unit refers to a kind of application form of water/air heat pump type unit, i.e. by water loops, small-sized water/air heat pump unit is connected in parallel, form a closed loop, constitute a set of to reclaim the interior of building waste heat heat pump heating as its low level heat energy, the air conditioning system of refrigeration.Its great advantage is: inner region needs cooling, and outskirt needs again the large area building of heat supply can realize refrigeration simultaneously and heat simultaneously, has heat recovery function.
Its Fresh air handling units of dedicated fresh air air conditioning system implemented at present is required for greatly extra low-temperature receiver cooling; handpiece Water Chilling Units is such as used to add the new wind of formal layout of new wind wind cabinet; this just requires that handpiece Water Chilling Units provides the cold water of not higher than 5 DEG C; new wind wind pushing temperature just can be made to be maintained at less than 7 DEG C, the most easily cause handpiece Water Chilling Units low-temperature protection.And handpiece Water Chilling Units is taken up an area big, in-convenience in use.
Summary of the invention
The technical problem to be solved is: provide the Fresh air handling units carrying low-temperature receiver for dedicated fresh air air conditioning system, and the installation making Fresh air handling units is convenient with flexible operation, makes dedicated fresh air air conditioning system have the characteristic of energy-conserving and environment-protective and the advantage that indoor air quality is high concurrently.
For reaching this purpose, it is provided that following technical scheme.
Central air-conditioner cooling water intelligent processing method and system thereof, including total-heat exchanger, Fresh air handling units, induction diffuser, be linked in sequence by pipeline, uses water-loop heat pump as Fresh air handling units.The new wind load that Fresh air handling units burden is whole, also undertakes indoor all latent heat loads, and part sensible heat load.Other sensible heat loads in air-conditioned room are still added end-equipment burden by conventional cooling-water machine, but its return air only circulates in same air-conditioned room, will not be with the return air cross-mixing in other rooms.Outdoor new wind enters dedicated fresh air air conditioning system, first passes around total-heat exchanger, absorbs the cold of air draft, is cooled to required temperature subsequently into water-loop heat pump Fresh air handling units, eventually passes through induction diffuser and blows air-conditioned room.
Central air-conditioner cooling water intelligent processing method and system thereof, including vaporizer, compressor, condenser, choke valve, centrifugal fan and self controlled element, vaporizer uses the fin-tube heat exchanger of copper pipe set aluminium foil, and front face area is 0.234～0.324m2, evaporator tube row is 8～10 rows, and number of tube passes is 4～5 journeys, heat transfer area 35.6～46.1m2, centrifugal fan air output 1500～1700 m3/h。
Central air-conditioner cooling water intelligent processing method and system thereof, condenser uses board-like water-cooled condenser.
Central air-conditioner cooling water intelligent processing method and system thereof, condenser uses telescoping water-cooling condenser.
Central air-conditioner cooling water intelligent processing method and system thereof, choke valve uses electric expansion valve.
Central air-conditioner cooling water intelligent processing method and system thereof, compressor uses frequency-changeable compressor.
Central air-conditioner cooling water intelligent processing method and system thereof, be respectively provided with two critesistor, monitoring evaporating temperature and vaporizer leaving air temp at vaporizer and new wind air outlet, obtain degree of superheat signal.
Owing to new wind comes from external environment, the instability so new wind inlet temperature fluctuates up and down, and the new air temperature after Fresh air handling units processes to be maintained at about 7 DEG C, this just requires that water-loop heat pump Fresh air handing unit possesses the ability of automatically controlling.Existing water-loop heat pump unit uses capillary tube as restricting element, and compressor is invariable frequency compressor, and cold regulation uses the dibit regulative mode opening, stopping compressor.The present invention then uses electric expansion valve and frequency-changeable compressor, in conjunction with temperature sensor and microprocessor and control circuit, according to the change of leaving air temp, reconcile compressor frequency, according to the evaporator outlet degree of superheat, reconcile electronic expansion valve opening, it is ensured that newly wind leaving air temp is constant.
Beneficial effects of the present invention is, have simple, flexible, the energy-conservation feature of water-loop heat pump and dedicated fresh air air conditioning system indoor air quality (IAQ) height, energy-saving and cost-reducing advantage concurrently, air-supply end-equipment can keep dry cooling condition to run, not breed bacteria, whole air conditioning system has the most energy-saving and cost-reducing characteristic.
Accompanying drawing explanation
Fig. 1 is central air-conditioner cooling water intelligent processing method of the present invention and the embodiment of system thereof；
Fig. 2 is another embodiment of central air-conditioner cooling water intelligent processing method of the present invention and system thereof.
Detailed description of the invention
In conjunction with accompanying drawing, detailed description of the invention is described.
As it is shown in figure 1, central air-conditioner cooling water intelligent processing method and system thereof include air-to-air total heat exchanger 5, water-loop heat pump Fresh air handling units 1, induction diffuser 2, pipeline connect in order.The thermic load of air-conditioned room 4 and humidity load are by two system burden.The whole new wind load of central air-conditioner cooling water intelligent processing method and system burden thereof, and whole humidity loads of air-conditioned room 4.Fan coil 3 combines the some or all of thermic load of handpiece Water Chilling Units (Fig. 1 is not shown) burden air-conditioned room 4.
Return air in air-conditioned room 4 is voluntarily in indoor circulation, but the return air not with other rooms intersects.The cold of self through air-to-air total heat exchanger 5, was passed to new wind 51, and eventually became air draft 52 and discharge before discharge chamber is outer by air-conditioned room air draft.
It is the most cooled that new wind 51 first passes through air-to-air total heat exchanger 5, is then passed through water-loop heat pump Fresh air handling units 1 and is cooled to the lowest temperature, about 7 DEG C, enters air-conditioned room 4 eventually through induction diffuser 2.
Owing to new wind is cold air distribution, in order to prevent air outlet condensation and avoid Cryogenic air to fall to causing blowing feeling to occur, use the induction diffuser of big induction ratio.Induction diffuser is to use isothermal jet principle.When air is by the spout of a diameter of Do, injects the space internal diffusion of same temperature with air supply velocity Vo, under conditions of not limited by ambient interfaces surface, i.e. form free jet.Due to the turbulent momentum-exchange between jet boundary and surrounding medium, the air of surrounding static is constantly involved in jet, along range direction, jet constantly expands, jet flow is continuously increased, and body stream axis speed is the most gradually decayed, and is continually changing along range: along with flow range direction is continuously increased, jet diameter strengthens, but the aggregated momentum of each section keeps constant.Induction diffuser makes the new wind of the low temperature sent quickly be heated to indoor temperature by room air near air outlet, it is to avoid air outlet condensation, and make room air more uniformly, improve the comfortableness of air-conditioning.
Using water-loop heat pump as the Fresh air handling units of dedicated fresh air air conditioning system, also the cooling water pipeline of multiple stage water-loop heat pump can be together in parallel, form water ring.By in water loops and large-area construction area, other need the room of heat supply to link up, and complete cooling and heat supply simultaneously, therefore have significant energy-saving effect.
Water-loop heat pump Fresh air handling units shown in Fig. 2, has three circulations.
Cold-producing medium circular flow in water-loop heat pump pipeline, according to conventional compression refigerating machine direction, cold-producing medium absorb heat vaporization at vaporizer 11, arrives condenser 13 through compressor 12, after the water cooling that is cooled, returns to vaporizer 11 through choke valve 14.
Cooling water enters condenser 13 by water inlet pipe 131, is discharged by the tailing edge outlet pipe 132 of cold-producing medium cooling.As the Fresh air handling units of the dedicated fresh air air conditioning system of building, the resh air requirement that separate unit water-loop heat pump unit provides is limited, is often that some water-loop heat pumps run simultaneously the most in a practical situation.The system of heat supply can be needed to couple together with in other regions of building water loops by the chilled(cooling) water return (CWR) of multiple stage water-loop heat pump and link up, it is achieved that cooling and the coproduction of heat supply, there is significant energy conservation and consumption reduction effects.
New wind, under the effect of centrifugal blower 15, is entered water-loop heat pump Fresh air handling units by new wind air inlet 17, is cooled to required temperature at vaporizer 11, discharge from new wind air outlet 18, entered into air-conditioned room 4 along pipeline by induction diffuser 2.
Cross valve 16 plays the effect of conversion refrigerant flow direction when water-loop heat pump realizes heat-production functions.
Existing conventional water-loop heat pump is to use as the air conditioner end equipment carrying low-temperature receiver, for processing the waste heat of air-conditioned room, remaining moisture, its cold wind ratio is little, only between 13～24kJ/kg, it is impossible to for the process of the dedicated fresh air air conditioning system low temperature new wind of big enthalpy difference.Water-loop heat pump has been done the design of novelty by the present invention, is allowed to be suitable for low temperature big enthalpy difference Fresh air handing: the vaporizer of employing is the fin-tube heat exchanger of copper pipe set aluminium foil, and face velocity is 1.5～2.5m/s, and front face area is 0.234～0.324m2, evaporator tube row is 8～10 rows, and number of tube passes is 4～5 journeys, heat transfer area 35.6～46.1m2, centrifugal fan air output 1500～1700 m3/h.The freon refrigerant of Bottomhole pressure evaporates at low temperatures, and the new wind of flowing outer with pipe carries out heat exchange, and making Fresh air handing is 6～7 DEG C to dry-bulb temperature, and the air condition of relative humidity 90%～95%, cold wind ratio is between 50～60kJ/kg.
It is respectively provided with two critesistor at vaporizer 11 and new wind air outlet 18, monitoring evaporating temperature and vaporizer leaving air temp, using the deviation of the degree of superheat (vaporizer leaving air temp-evaporating temperature) and setting value as controlled quentity controlled variable, micro computer arranges regulation program, change electronic expansion valve opening, adjusting refrigerant flow rate, changes the refrigeratory capacity of vaporizer.Using the deviation of leaving air temp and setting value as controlled quentity controlled variable, micro computer arranges regulation program, adjusts compressor frequency, as overgauge, then increases compressor frequency, improves compressor refrigeratory capacity, to reduce leaving air temp；As for minus deviation, then reduce compressor frequency, reduce compressor refrigeratory capacity, to improve leaving air temp.The purpose reaching to automatically control Fresh air handling units leaving air temp with this.
Claims (7)
1. a central air-conditioner cooling water intelligent processing method and system thereof, including total-heat exchanger, Fresh air handling units and induction diffuser, it is linked in sequence by pipeline, it is characterized in that: Fresh air handling units is water-loop heat pump, the vaporizer of described water-loop heat pump is the fin-tube heat exchanger of copper pipe set aluminium foil, and front face area is 0.234～0.324m2, evaporator tube row is 8～10 rows, and number of tube passes is 4～5 journeys, and heat transfer area is 35.6～46.1m2, centrifugal fan air output is 1500～1700 m3/h。
2. central air-conditioner cooling water intelligent processing method as claimed in claim 1 and system thereof, including vaporizer, compressor, condenser, choke valve, centrifugal fan and self controlled element, it is characterized in that: vaporizer is the fin-tube heat exchanger of copper pipe set aluminium foil, and front face area is 0.234～0.324m2, evaporator tube row is 8～10 rows, and number of tube passes is 4～5 journeys, and heat transfer area is 35.6～46.1m2, centrifugal fan air output is 1500～1700 m3/h。
3. central air-conditioner cooling water intelligent processing method as claimed in claim 2 and system thereof, it is characterised in that: condenser is board-like water-cooled condenser.
4. central air-conditioner cooling water intelligent processing method as claimed in claim 2 and system thereof, it is characterised in that: condenser is telescoping water-cooling condenser.
5. central air-conditioner cooling water intelligent processing method as claimed in claim 2 and system thereof, it is characterised in that: choke valve is electric expansion valve.
6. central air-conditioner cooling water intelligent processing method as claimed in claim 2 and system thereof, it is characterised in that: compressor is frequency-changeable compressor.
7. central air-conditioner cooling water intelligent processing method as claimed in claim 2 and system thereof, it is characterised in that: at vaporizer and new wind air outlet, it is respectively provided with two critesistor, monitoring evaporating temperature and vaporizer leaving air temp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510239272.1A CN106288127A (en) | 2015-05-13 | 2015-05-13 | Central air-conditioner cooling water intelligent processing method and system thereof |
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| CN201510239272.1A CN106288127A (en) | 2015-05-13 | 2015-05-13 | Central air-conditioner cooling water intelligent processing method and system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302731A (en) * | 2018-02-24 | 2018-07-20 | 佛山市知而行信息科技有限公司 | A kind of control method of fan coil supply air system |
| CN111141002A (en) * | 2019-12-31 | 2020-05-12 | Tcl空调器(中山)有限公司 | Fresh air conditioner control method, device, equipment and storage medium |
-
2015
- 2015-05-13 CN CN201510239272.1A patent/CN106288127A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302731A (en) * | 2018-02-24 | 2018-07-20 | 佛山市知而行信息科技有限公司 | A kind of control method of fan coil supply air system |
| CN111141002A (en) * | 2019-12-31 | 2020-05-12 | Tcl空调器(中山)有限公司 | Fresh air conditioner control method, device, equipment and storage medium |
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Application publication date: 20170104 |