CN100538208C - A kind of double-temperature refrigerator water/cold wind unit - Google Patents

A kind of double-temperature refrigerator water/cold wind unit Download PDF

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Publication number
CN100538208C
CN100538208C CNB2008100560012A CN200810056001A CN100538208C CN 100538208 C CN100538208 C CN 100538208C CN B2008100560012 A CNB2008100560012 A CN B2008100560012A CN 200810056001 A CN200810056001 A CN 200810056001A CN 100538208 C CN100538208 C CN 100538208C
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China
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evaporimeter
temperature
compressor
water
cold
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Expired - Fee Related
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CNB2008100560012A
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Chinese (zh)
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CN101216225A (en
Inventor
赵伟
石文星
王宝龙
李先庭
颜承初
王嘉
韩林俊
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Tsinghua University
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Tsinghua University
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Abstract

A kind of double-temperature refrigerator water/cold wind unit, belong to the refrigeration and air-conditioning technical field, comprise low temperature stage compressor, middle temperature stage compressor, condenser, high temperature level choke valve, middle temperature evaporimeter, low temperature level choke valve, cryogenic vaporizer, it is characterized in that: in described, the low temperature stage compressor is arranged in parallel, air-breathing and be compressed to pressure at expulsion in therefrom warm respectively evaporimeter and the cryogenic vaporizer; During summer operation, in cryogenic vaporizer, produce low-temperature cold water/cold wind, warm cold water in middle temperature evaporimeter, producing simultaneously; Four-way change-over valve is set in unit, during winter operation, can be used for producing two warm water/hot blasts.Be specially adapted to adopt the humiture independence control air conditioner system of " radiation heat transfer "+" independent new wind " mode, wherein, in the cold/hot water produced of warm evaporimeter be used for " radiation heat transfer ", cold/hot water/wind that cryogenic vaporizer is produced is used for handling " independent new wind ", it is simple to have system, the Energy Efficiency Ratio height, high and low temperature is cold/and heat can freely regulated advantage.

Description

A kind of double-temperature refrigerator water/cold wind unit
Technical field
The invention belongs to the Refrigeration ﹠ Air-Conditioning equipment technical field, in particular for the double-temperature refrigerator water/cold wind unit of air-conditioning system.
Background technology
Be the efficiency of raising air-conditioning system and the comfortableness of indoor environment, at present, the humiture of " cold emission furred ceiling+dedicated outdoor air system (Dedicated Outdoor Air Systems) " is independently controlled the concern that air conditioning mode more and more is subjected to industry.This type systematic adopts about 18 ℃ middle temperature cold water to take away indoor sensible heat load in the cold emission furred ceiling, in dedicated outdoor air system, adopt about 7 ℃ low-temperature cold water to take away the total heat load and the indoor latent heat load of new wind, not only can reduce the energy resource consumption of air-conditioning system, and can provide as snug as a bug in a rug, the indoor environment of health.Succeeding in developing of double-temperature refrigerator water unit will advance the development of " cold emission furred ceiling "+" dedicated outdoor air system " air-conditioning system, with the quality of life of improving people, the waste that reduces electric power and groundwater resources, reduce difficulty of construction, shorten construction period, have tangible economic benefit and social benefit.
2004 Chinese patent 200410009292.1 " a kind of double-temperature refrigerator water/cold wind unit that is used for air-conditioning system " a kind of double-temperature refrigerator water/cold wind unit that is used for air-conditioning system that can produce warm cold water and low-temperature cold water/cold wind is simultaneously disclosed, as shown in Figure 1.This double-temperature refrigerator water/cold wind unit has adopted twin-stage throttling, middle twin-stage compression refrigeration circulation of cooling off fully, produce the middle temperature cold water about 18 ℃ in the middle temperature evaporimeter behind the hiigh pressure stage choke valve, produce low-temperature cold water (about 7 ℃)/cold wind in the cryogenic vaporizer in the low-pressure stage choke valve, for the air-conditioning system of " cold emission furred ceiling+dedicated outdoor air system " provides the double-temperature refrigerator source easily, compare with prior art, this invention has that efficiency is higher, easy construction, be easy to the advantage popularizing and promote.
Because from different places, building function and each sensible heat load constantly are different with latent heat load, need double-temperature refrigerator water/cold wind unit that different middle gentle low temperature colds is provided, so require unit to have the ability of wherein warm cold of timely adjustment and low temperature cold, and under different running statuses, all has higher Energy Efficiency Ratio as far as possible, 200410009292.1 the disclosed technical scheme of patent is owing to adopted the compressor mode that is connected in series, though double-temperature refrigerator water can be provided, the regulating power of gentle low temperature cold in also having to a certain extent, but the deficiency that also has three aspects: (1) is for the middle temperature cold and the low temperature cold of any variation, the regulating power deficiency of this unit, warm cold in some occasion only needs particularly, and when not needing the low temperature cold, this unit then is difficult to realize effective adjusting; (2) when low temperature cold proportion was produced the low temperature cold more greatly even all, the system form of this unit had determined its Energy Efficiency Ratio further not improve; (3) this unit does not still possess the function that winter operation is produced hot water, therefore also need dispose other heat source system in the winter time, has increased the initial cost of air-conditioning system.Therefore, press for propose a kind of in, the low temperature cold can free adjustment, operational energy efficiency is higher, can produce high-temperature-hot-water/hot blast and middle warm water's double-temperature refrigerator water unit in the winter time simultaneously, makes this unit independently control air conditioning mode cold and hot amount is provided for realizing humiture the whole year.
Summary of the invention
In view of the foregoing, the present invention will propose a kind of technical scheme of new double-temperature refrigerator water/cold wind unit, its objective is:
1. make double-temperature refrigerator water/cold wind unit can realize low temperature cold and middle temperature cold free adjustment, and can independently produce in warm cold or low temperature cold; 2. when producing the low temperature cold more greatly and independently, low temperature cold proportion has more high energy efficiency ratio; 3. can realize freezing and the conversion of heat-production functions, make unit produce two warm water/hot blasts in the winter time, to reduce the cost of investment of humiture independence control air conditioner system.
The present invention will provide capacity regulating double-temperature refrigerator source and thermal source easily for " radiation heat transfer "+" independent new wind " air-conditioning system, to improve the operational efficiency of indoor environmental quality, raising air-conditioning system.
Technical scheme of the present invention is:
A kind of double-temperature refrigerator water/cold wind unit, by the first order compressor and second compressor, condenser, first order choke valve, first evaporimeter, the second level choke valve and second evaporimeter constitute, it is characterized in that: the first order compressor and the second compressor parallel setting, the exhaust of the first order compressor and second compressor mixes compressed machine blast pipe, the condenser air inlet pipe enters condenser condenses and becomes high pressure liquid refrigerant, again through the throttling of first order choke valve, enter in first evaporimeter, pass through middle temperature cold water in the aquaporin of first evaporimeter, by in the heating of warm cold water and gaseous refrigerant after the evaporation through in wet attitude refrigerant pipe enter second compressor and be compressed, and be disposed in the blast pipe of second compressor; The liquid refrigerant that is not evaporated in first evaporimeter, enter second evaporimeter through second level choke valve, draw second evaporimeter in addition side low-temperature cold water/cold wind heat and evaporate, enter first order compressor and be compressed through the second evaporimeter muffler, first order compressor suction duct, and be disposed in the blast pipe of first order compressor; Through above-mentioned circulation, warm cold water in producing in first evaporimeter is produced low-temperature cold water/cold wind in second evaporimeter.
Above-mentioned double-temperature refrigerator water/cold wind unit, it is characterized in that: insert the cold-producing medium four-way change-over valve in system, four interfaces of four-way change-over valve are connected with compressor exhaust pipe, condenser air inlet pipe, first order compressor suction duct and the second evaporimeter muffler respectively; During refrigerating operaton, warm cold water in producing in first evaporimeter is produced low-temperature cold water/cold wind in second evaporimeter; During heating operation, in first evaporimeter, produce middle warm water, in second evaporimeter, produce high-temperature-hot-water/hot blast.
Above-mentioned double-temperature refrigerator water/cold wind unit is characterized in that: described condenser is cold-producing medium-water-to-water heat exchanger or cold-producing medium-air heat exchanger.
Above-mentioned double-temperature refrigerator water/cold wind unit is characterized in that: described second evaporimeter is cold-producing medium-water-to-water heat exchanger or cold-producing medium-air heat exchanger.
Above-mentioned double-temperature refrigerator water/cold wind unit is characterized in that: described first evaporimeter is the full-liquid type shell and tube exchanger, is aquaporin in the heat exchange coil, and the enclosure interior and the coil pipe outside are coolant channel.
Above-mentioned double-temperature refrigerator water/cold wind unit is characterized in that: first order choke valve adopts float-ball type expansion valve or electric expansion valve, and second level choke valve adopts float-ball type expansion valve, electric expansion valve or heating power expansion valve.
Above-mentioned double-temperature refrigerator water/cold wind unit is characterized in that: the described first order compressor and second compressor are capacity adjustable type compressor.
Adopt the technical scheme of the described double-temperature refrigerator water/cold wind unit of the present invention's proposition, compared with prior art, have the following advantages and the high-lighting effect:
(1) centering temperature level and first order compressor carry out capacity regulating, the size of warm cold and low temperature cold in can freely regulating to this double-temperature refrigerator water/air-cooler group respectively.When closing second level choke valve and stopping first order compressor, warm cold water in can producing separately; Isolated operation of first order compressor or first order compressor and second compressor move all simultaneously can produce low-temperature cold water or low-temperature cold wind separately; (2) when producing the low temperature cold more greatly and independently, low temperature cold proportion has more high energy efficiency ratio.The present invention adopts second compressor and first order compressor parallel technical scheme, bigger than normal and when producing the low temperature cold separately in the ratio of producing the low temperature cold, utilize second compression extraction air compression, have higher Energy Efficiency Ratio than the twin-stage compress technique scheme of 200410009292.1 patent disclosures; (3) in the unit kind of refrigeration cycle, add the cold-producing medium four-way change-over valve, can realize producing summer double-temperature refrigerator water/wind, produce two warm water/wind winter, particularly when condenser side adopts air cooling heat exchanger, has clear superiority, the double-temperature refrigerator source and the heat resource equipment of humiture independence control air conditioner system are united two into one, save the investment of air-conditioning system.
Description of drawings
The structure and the kind of refrigeration cycle schematic diagram of " a kind of double-temperature refrigerator water/cold wind unit that is used for air-conditioning system " that provide in the prior art are provided Fig. 1.
Fig. 2 is the structure and the kind of refrigeration cycle schematic diagram of a kind of double-temperature refrigerator water provided by the invention/cold wind unit.
Fig. 3 is structure and the kind of refrigeration cycle schematic diagram of second kind of embodiment of a kind of double-temperature refrigerator water provided by the invention/cold wind unit.
Fig. 4 be a kind of double-temperature refrigerator water provided by the invention/cold wind unit second kind of embodiment heat circulation theory figure.
The label of each parts and title are as follows among Fig. 2 to Fig. 4:
1-first order compressor; 2-high stage compressor; 3-condenser; 4-first order choke valve; 5-the first evaporimeter; 6-second level choke valve; 7-the second evaporimeter; 8-low-temperature cold water/cold air inlet; 9-low-temperature cold water/cold wind outlet; 10-middle temperature cold water inlet; 11-middle temperature cooling water outlet; 12-cooling water/air intake; 13-cooling water/air outlet slit; 14-middle wet attitude refrigerant pipe; 15-the second evaporimeter muffler; 16-first order compressor suction duct; 17-compressor exhaust pipe; 18-condenser air inlet pipe; 19-cold-producing medium four-way change-over valve.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Embodiment 1:
Fig. 2 is the structure and the kind of refrigeration cycle schematic diagram of a kind of double-temperature refrigerator water provided by the invention/cold wind unit.Fig. 2 show comprise two parallel connections in, the kind of refrigeration cycle schematic diagram of the double-temperature refrigerator water unit of gentle low-temperature cold water in the producing of first order compressor.This double-temperature refrigerator water unit is made of first order compressor 1, second compressor 2, condenser 3, first order choke valve 4, first evaporimeter 5, second level choke valve 6, second evaporimeter 7; In the therefrom warm cold water inlet 10 of warm cold water enter in the aquaporin of first evaporimeter 5, by in after the warm refrigerant cools, therefrom warm cooling water outlet 11 flow to humiture independence control air conditioner system in the warm interchanger, remove indoor air sensible heat; By in the heating of warm cold water and gaseous refrigerant after the evaporation through in wet attitude refrigerant pipe 14 enter second compressor 2, be compressed and be disposed in its blast pipe 17; The liquid refrigerant that is not evaporated in first evaporimeter 5 enters second evaporimeter 7 through second level choke valve 6; Low-temperature cold water enters in the aquaporin of second evaporimeter 7 from low-temperature cold water inlet 8, after the low-temperature refrigerant cooling, flows in the low temperature heat exchanger of humiture independence control air conditioner system from low-temperature cold water outlet 9, handles new wind and absorbs the latent heat of room air; Low-temperature refrigerant is drawn the heat of second evaporimeter, 7 other side low-temperature cold waters and is evaporated, and enters first order compressor 1 through the second evaporimeter muffler 15, first order compressor suction duct 16, and the high-pressure gaseous refrigerant after being compressed is disposed in its blast pipe; The exhaust of second compressor 2 and first order compressor 1 mixes compressed machine blast pipe 17, condenser air inlet pipe 18 enters condenser 3, cooling water flows back to cooling tower from cooling tower and enter the heat of condenser 3 absorption high temperature refrigerants from cooling water inlet 12 after from coolant outlet 13; After in condenser 3, being condensed into high pressure liquid refrigerant,, enter in first evaporimeter 5 through 4 throttlings of first order choke valve.Through above-mentioned circulate in produce in first evaporimeter 5 in warm cold water, in second evaporimeter 7, produce low-temperature cold water.
Through the cold water/cold wind unit of above-mentioned circulation, middle temperature cold water will be entered in first evaporimeter 5 by inlet 10 and be cooled to about 18 ℃, be sent by middle temperature cooling water outlet 11 again; And low-temperature cold water/cold wind will enter the low-temperature cold water/cold wind that makes in second evaporimeter 7 about 7 ℃ by inlet 8, send through exporting 9.This unit is specially adapted to the system that humiture is independently controlled, to provide the double-temperature refrigerator source easily for " cold emission furred ceiling+dedicated outdoor air system " air-conditioning system, the outlet 11 middle temperature cold water of sending are sent into the cold emission furred ceiling, directly send into VMC and export 9 low-temperature cold water/cold wind of sending.
In above-mentioned double-temperature refrigerator water/cold wind unit, condenser can adopt cold-producing medium-water-to-water heat exchanger or cold-producing medium-air heat exchanger, and what adopt in the present embodiment is cold-producing medium-water hull pipe heat exchanger; Second evaporimeter 7 can adopt cold-producing medium-water-to-water heat exchanger or cold-producing medium-air heat exchanger, and second evaporimeter 7 and first evaporimeter 5 are cold-producing medium-water flooded evaporator in the present embodiment; Second level choke valve 6 adopts float-ball type expansion valve, electric expansion valve or heating power expansion valve, and first order choke valve 4 adopts float-ball type expansion valve or electric expansion valve, by the liquid level in ball-cock assembly and/or electronic expansion valve controls first evaporimeter.
Above-mentioned double-temperature refrigerator water/cold wind unit, the first order compressor 1 and second compressor 2 adopt capacity adjustable type compressors, as the piston type that adopts regulative modes such as variable speed, unloading, vortex, screw, centrifugal compressor etc.
Embodiment 2:
Fig. 3 is structure and the kind of refrigeration cycle schematic diagram of second kind of embodiment of a kind of double-temperature refrigerator water provided by the invention/cold wind unit.Fig. 3 shows the kind of refrigeration cycle schematic diagram of this embodiment, and what Fig. 4 showed this embodiment heats circulation theory figure.Present embodiment is the heat pump form of the foregoing description 1, this pump type heat double-temperature refrigerator/hot water/blower fan group is made of first order compressor 1, second compressor 2, condenser 3, first order choke valve 4, first evaporimeter 5, second level choke valve 6, second evaporimeter 7 and cold-producing medium four-way change-over valve 19.Its structural principle and embodiment 1 are identical, and different is:
(1) condenser among the embodiment 13 is a water cooled condenser, and the condenser 3 in the present embodiment is an air cooled condenser; Second evaporimeter 7 among the embodiment 1 is the flooded evaporator of water for the medium that is cooled, and second evaporimeter 7 in the present embodiment is the dry evaporator of air for the medium that is cooled;
(2) on the basis of cold-producing medium connecting line shown in the embodiment 1, insert the cold-producing medium four-way change-over valve in system, four interfaces of four-way change-over valve are connected with compressor exhaust pipe 17, condenser air inlet pipe 18, first order compressor suction duct 16 and the second evaporimeter muffler 15 respectively; During refrigerating operaton, warm cold water in producing in first evaporimeter 5 is produced low-temperature cold wind in second evaporimeter 7; During heating operation, in first evaporimeter 5, produce middle warm water, in second evaporimeter 7, produce high-temperature hot-air.
Adopt pump type heat double-temperature refrigerator/hot water/blower fan group, can make humiture independence control air conditioner system summer and winter shared same equipment that double-temperature refrigerator, thermal source are provided, thereby reduce the investment of air-conditioning system, the simplification system reduces difficulty of construction.During refrigeration and embodiment 1 identical, when heating in the warm water will enter in first evaporimeter 5 and be heated to about 30 ℃ by inlet 10, send by outlet 11 again; And high-temperature-hot-water/hot blast will enter the high-temperature-hot-water/hot blast that makes in second evaporimeter 7 about 40 ℃ by inlet 8, send through exporting 9.
It should be noted that the quantity of second compressor, first order compressor can be respectively second compressor bank and the first order compressor bank of one or more formation; The cooling medium of condenser side is that the medium that is cooled of air or water, second evaporimeter is that the medium that is cooled of air or water, first evaporimeter is water or other liquids, and the various combinations of these cooling mediums and the medium that is cooled all belong to the protection domain of this patent.

Claims (7)

1. double-temperature refrigerator water unit, by first order compressor (1), high stage compressor (2), condenser (3), first order choke valve (4), first evaporimeter (5), second level choke valve (6) and second evaporimeter (7) constitute, it is characterized in that: first order compressor (1) and high stage compressor (2) are arranged in parallel, the exhaust of first order compressor (1) and high stage compressor (2) mixes compressed machine blast pipe (17), condenser air inlet pipe (18) enters condenser (3) and is condensed into high pressure liquid refrigerant, again through first order choke valve (4) throttling, enter in first evaporimeter (5), pass through middle temperature cold water in the aquaporin of first evaporimeter (5), by in the heating of warm cold water and gaseous refrigerant after the evaporation through in wet attitude refrigerant pipe (14) enter high stage compressor (2) and be compressed, and be disposed in the blast pipe of high stage compressor; The liquid refrigerant that is not evaporated in first evaporimeter (5), enter second evaporimeter (7) through second level choke valve (6), draw second evaporimeter (7) in addition the side low-temperature cold water heat and evaporate, enter first order compressor (1) and be compressed through the second evaporimeter muffler (15), first order compressor suction duct (16), and be disposed in the blast pipe of first order compressor; Through above-mentioned circulation, warm cold water in producing in first evaporimeter (5) is produced low-temperature cold water in second evaporimeter (7).
2. according to the described a kind of double-temperature refrigerator water unit of claim 1, it is characterized in that: insert cold-producing medium four-way change-over valve (19) in system, four interfaces of four-way change-over valve are connected with compressor exhaust pipe (17), condenser air inlet pipe (18), first order compressor suction duct (16) and the second evaporimeter muffler (15) respectively; During refrigerating operaton, warm cold water in producing in first evaporimeter (5) is produced low-temperature cold water in second evaporimeter (7); During heating operation, in first evaporimeter (5), produce middle warm water, in second evaporimeter (7), produce high-temperature-hot-water.
3. according to claim 1 or 2 described a kind of double-temperature refrigerator water units, it is characterized in that: described first evaporimeter (5) is the full-liquid type shell and tube exchanger, is aquaporin in the heat exchange coil, and the enclosure interior and the coil pipe outside are coolant channel.
4, according to claim 1 or 2 described a kind of double-temperature refrigerator water units, it is characterized in that: first order choke valve (4) adopts float-ball type expansion valve or electric expansion valve, and second level choke valve (6) adopts float-ball type expansion valve, electric expansion valve or heating power expansion valve.
5 according to claim 1 or 2 described a kind of double-temperature refrigerator blower fan groups, and it is characterized in that: described first order compressor (1) and high stage compressor (2) are capacity adjustable type compressor.
6. double-temperature refrigerator blower fan group, by first order compressor (1), high stage compressor (2), condenser (3), first order choke valve (4), first evaporimeter (5), second level choke valve (6) and second evaporimeter (7) constitute, it is characterized in that: first order compressor (1) and high stage compressor (2) are arranged in parallel, the exhaust of first order compressor (1) and high stage compressor (2) mixes compressed machine blast pipe (17), condenser air inlet pipe (18) enters condenser (3) and is condensed into high pressure liquid refrigerant, again through first order choke valve (4) throttling, enter in first evaporimeter (5), pass through middle temperature cold water in the aquaporin of first evaporimeter (5), by in the heating of warm cold water and gaseous refrigerant after the evaporation through in wet attitude refrigerant pipe (14) enter high stage compressor (2) and be compressed, and be disposed in the blast pipe of high stage compressor; The liquid refrigerant that is not evaporated in first evaporimeter (5), enter second evaporimeter (7) through second level choke valve (6), draw second evaporimeter (7) in addition the side low-temperature cold wind heat and evaporate, enter first order compressor (1) and be compressed through the second evaporimeter muffler (15), first order compressor suction duct (16), and be disposed in the blast pipe of first order compressor; Through above-mentioned circulation, warm cold water in producing in first evaporimeter (5) is produced low-temperature cold wind in second evaporimeter (7).
7. according to the described a kind of double-temperature refrigerator blower fan group of claim 6, it is characterized in that: insert cold-producing medium four-way change-over valve (19) in system, four interfaces of four-way change-over valve are connected with compressor exhaust pipe (17), condenser air inlet pipe (18), first order compressor suction duct (16) and the second evaporimeter muffler (15) respectively; During refrigerating operaton, warm cold wind in producing in first evaporimeter (5) is produced low-temperature cold wind in second evaporimeter (7); During heating operation, warm wind in producing in first evaporimeter (5) is produced high-temperature hot-air in second evaporimeter (7).
CNB2008100560012A 2008-01-11 2008-01-11 A kind of double-temperature refrigerator water/cold wind unit Expired - Fee Related CN100538208C (en)

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CNB2008100560012A CN100538208C (en) 2008-01-11 2008-01-11 A kind of double-temperature refrigerator water/cold wind unit

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Application Number Priority Date Filing Date Title
CNB2008100560012A CN100538208C (en) 2008-01-11 2008-01-11 A kind of double-temperature refrigerator water/cold wind unit

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CN101216225A CN101216225A (en) 2008-07-09
CN100538208C true CN100538208C (en) 2009-09-09

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103134109A (en) * 2011-11-24 2013-06-05 王春刚 Variable temperature soothing (VTS) air-conditioning system
CN103808010A (en) * 2012-11-15 2014-05-21 珠海格力电器股份有限公司 Quasi-second-stage compression heat-pump water heater and control method thereof
CN103742983A (en) * 2014-01-03 2014-04-23 东南大学 Dual-temperature refrigeration system based on non-azeotropic refrigerant, and control method for same
CN105444453B (en) * 2015-12-18 2018-01-23 珠海格力电器股份有限公司 A kind of dual temperature refrigeration and heating
CN110030754B (en) * 2019-03-20 2020-12-15 浙江大学宁波理工学院 Refrigerating system for improving distribution uniformity of refrigerant at inlet of multichannel evaporator

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