CN101029758B - Multi-point atomizing central air-conditioner without nozzle - Google Patents

Multi-point atomizing central air-conditioner without nozzle Download PDF

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Publication number
CN101029758B
CN101029758B CN2006100593337A CN200610059333A CN101029758B CN 101029758 B CN101029758 B CN 101029758B CN 2006100593337 A CN2006100593337 A CN 2006100593337A CN 200610059333 A CN200610059333 A CN 200610059333A CN 101029758 B CN101029758 B CN 101029758B
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China
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air
spray
spraying
indoor
water
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CN2006100593337A
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Chinese (zh)
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CN101029758A (en
Inventor
涂前文
屈中科
卢国斌
王旺喜
孙黎明
李雯
胡燕新
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涂前文
远方航空技术发展总公司远方环保设备厂
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Publication of CN101029758A publication Critical patent/CN101029758A/en
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Abstract

This invention is used for adjusting indoor air temperature, humidity and cleanliness to meet the environmental sanitation, comfort and craft demand. The indoor recirculated air containing dust, particles, oil fume dust impurity or fibrous dust and fresh air are mixed, filtered and cleaned. A plurality of axial flow spray fans or orinclined-flow spray fans are adopted to reduce atomized water droplet equivalent diameter and water-gas ratio in a manner of multipoint spraying in a rectangle full section at the spraying section. The atomized water droplet surface area and heat and moisture exchange efficiency are improved so as to make the spraying flow cover the whole rectangle full section and mix sharply with air. The invention provides a novel central air-conditioning which cancels multi-row spray throwers, spraying nozzles, water tanks and high-power centrifugal pumps arranged indoor at the spraying section which are currently used in the traditional air-conditioning room and combined air-conditioning units both at home and abroad.

Description

Multi-point atomizing does not have the nozzle central air conditioning

One, the scope of present technique use

The present invention is a kind of megastore that is used for, subway, public place such as office building, auditoriums, hotels and various industrial enterprise meet environmental sanitation for regulating indoor air temperature and humidity and cleanliness factor, comfortableness, the manufacturability requirement, to contain dust, particle, the indoor return air of oil smoke trifle in the world thing or fine dust and outdoor new wind filter and remove and adopt a plurality of small-size shaft streaming mist-spraying cooling fans or diagonal flow type mist-spraying cooling fan to reduce water droplets equivalent diameter and WGR at the full section of spray section rectangle with the multi-point atomizing form after mixing, it is many that its water droplets surface area sum total is higher than existing various central air-conditioning chamber, make its spray stream cover the full section of whole rectangle and acutely mix with air, cancel domestic, many rows shower that outer traditional air conditioning chamber that uses at present and assembled air-conditioner unit generally adopt in the indoor setting of spray section, spraying water nozzle and cistern and more powerful centrifugal water pump, it is little to reach installed power, water consumption is little, operating noise is little, WGR is little, the wet exchange rate height of heat, save the energy and water, simultaneously can solve China textile mills " coal-dust stained yarn " difficult problem in passing, be that technical performance is advanced and by the novel central air-conditioning of China's original creation.

Two, domestic and international technology status at present

At present, no matter the home and abroad is central air-conditioning chamber (being commonly referred to as the assembled air-conditioner unit) that is used for public places such as megastore, subway and office building, auditoriums, hotels or the central air-conditioning chamber that is used for industrial enterprise (as textile mills, chemical fibre factory, medicine, electronics, automobile factory etc.), all is to connect, make up be assembled (seeing Figure of description 2,3 for details) by several main functional sections.Functional characteristics of each section and purposes brief introduction are as follows:

New wind air return section (claiming to mix the wind section again): the return air inlet place that enters the outdoor new wind of this section and indoor reuse all has and adopts that manual or electronic control mode flexible modulation is new, the adjusting air-valve (adjustable blind window) of return air amount ratio, makes new, return air enter next section after accessing abundant mixing.Fillter section: enter the dust, particle, oil smoke trifle in the world matter or the fine dust that contain in the air of this section after having mixed, the form that is installed in this Duan Yichu effect, middle effect, inferior high efficiency filter is blocked on the filter bag made from nonwoven or other filter material, the filter bag that the user can block according to the Differential Pressure Unit shown signal data timely replacing of random installation before and after the filter bag.Or by removing institute's fibre-bearing, dust impurity and particle etc. in the air continuously for the stainless steel disc filtration device of special industry special configuration such as weaving, tobacco or multilayer large carrying food-basket formula, curtain-type efficient electrostatic duster.Bringing-up section: according to user's condition needs and engineering working condition requirement, can select the heating of (steam) light pipe, electric Far-infrared Heating or copper pipe stringed alumium fin heating (being applicable to≤65 ℃ of hot water systems) for use, can be used for improving winter the technology of indoor temperature.Humidifier section: utilize dry steam humidifier to adopt different adjusting devices to realize manual, electronic or pneumatic control, so that air is carried out isothermal humidification; The user of no steam can match compressed air atomizing humidifier or the supporting adapted of electrode humidifier; This section equipment can be used in combination to reduce air conditioning chamber or machine group length with bringing-up section equipment.Surface cooling section: the surface cooler of three kinds of forms of 4,6,8 rows generally is housed and has a streamlined lower resistance water fender with what materials such as fiberglass, ABS engineering plastics or aluminium alloy were made for what the user selected.Surface cooling section can reduce air themperature.The big water droplet that water fender can condense water smoke is assembled the back and is fallen into spray section pond, indoor bottom or board slot along the plate face, can avoid air-supply band water (water fender generally is contained in the indoor rear end of spray section).Other functional section: also have return fan section, blower section, primary retirn air section, exhaustion section, flow equalization section, muffler section, interlude, air supply section, spray section etc. according to various different process, all need select for use, be combined in the full machine as system flow.

In all central air-conditioning chambers, spray section is the core of full machine, is the most important function section, and whether the function admirable of its function, usefulness direct mark air conditioning chamber or air conditioner to be, so, traditional handicraft is carried out the innovation meeting play a multiplier effect.

The spray section of tradition air conditioning chamber, home and abroad and combined type air conditioner generally has single-stage two row's showers, twin-stage three rows, several forms of four row's showers (many spraying water nozzles all are housed) to form at present, the cistern that indoor bottom all has supply-water pump to use, the pressurization of employing centrifugal water pump, make chilled water (summer with) or normal-temperature water by the swirl atomizer ejection that nebulizes, make air the time by this section cross section, carry out the wet exchange of heat, reach that order falls, the intensification degree and add, the purpose of dehumidification degree.The main air blower of central air-conditioning can be in the forward and backward setting of this section, be called preceding forced, after be called suction-type.

All there is the spray comb central air-conditioning chamber, home and abroad (except that individual processes) and spray water nozzle, water pump and cistern structure since more than 100 year history of spray section (chamber) invention.According to physics principle, under the gentle water yield condition of equal chilled water, the equivalent diameter of the single water droplet in atomizing back is more little, and droplet is many more, and its water droplets surface area sum total is just big more; Mix more acutely at the full face air-flow of rectangle spray chamber, its WGR is just more little; Efficiency of damp and hot exchanging is just high more, and the air-conditioning effect is just good more.Because the atomizing effect of the spraying water nozzle that present central air-conditioning chamber, home and abroad is adopted is subjected to the direct influence and the restriction of water-aspirator pressure variation, nozzle outlet diameter size (the general φ 3-5mm that is commonly used) and the condition of whether blocking, its structure has just determined that also its WGR is higher relatively, the consumption water yield is big, efficiency of damp and hot exchanging is difficult to improve on existing basis again, thereby the energy consumption of blower fan, water pump is higher.At present the assembled air-conditioner unit is when the single large power shaft streaming mist-spraying cooling fan of employing, because its spray flow square range is all more than 25M, max-flow square diameter is more than φ 3.5M, but max-flow square diameter occurs in the 15M place, and the water fender that is in spray chamber (it is long only had about 3.9M by length restriction) rear end 3.9M place only has the water smoke of middle φ 2.8M diameter to block and block it for a long time, make atomizing (diameter) effect of its maximum have little time to give full play to and mix, spray stream promptly arrives shelves water plate place, its spray chamber rectangular cross section also has considerable vacant area, the space does not have the atomizing exchange and takes place, add that the major diameter draught fan impeller is limited by rotating speed, maximum speed only has 1000r/min (owing to be subjected to leaf line speed power-limiting/diameter big more, speed is low more, how 960,750,580r/min), the equivalent diameter of water droplets is bigger so be subjected to slow-speed of revolution restriction by the broken number of times/min of fan blade bump, WGR is than higher (humidification WGR μ≤0.4-0.5, the process WGR of drying is μ≤0.6-1.0), so efficiency of damp and hot exchanging is still not high, thereby at home, in outer all tradition and the combined type central air-conditioning chamber, still need install traditional shower additional in that spray section is indoor, spraying water nozzle and cistern and more powerful water pump are wet as falling summer, the indispensable additional measure of drying.This class central air-conditioning chamber installed power is bigger as a result for it, and water consumption is bigger, and WGR is than higher, and energy consumption has can hardly be avoided than the higher position.

Three, the technology of the present invention principle

The objective of the invention is: adopt many (4-10 platforms) (2860r/1450r/min) axial-flow type mist-spraying cooling fan or regular layout symmetrically installation on spray section front end end plate of diagonal flow type mist-spraying cooling fan at a high speed, make it that multiply spray stream of φ 0.1-0.14mm only be arranged from multiple spot direction injection to the back-end droplet equivalent diameter, all droplet surface area sum total is much higher than traditional type and combined type air conditioner, so the efficiency of damp and hot exchanging height; Smaller (the process of heating WGR μ≤0.1 of WGR, the process of drying WGR μ≤0.4), and make the multiply spray stream carry out the wet exchange of heat simultaneously up to the indoor rear end of spray section in the violent mixing of the full section of the indoor rectangle of spray section, in having preshoot greatly or upper and lower impact flow velocity and the violent water spray haze current that mix, the ability and the effect of fine particles such as the oil smoke dirt of the various compositions that its water droplet surrounds, seizure causes China textile mills " coal-dust stained yarn " difficult problem, dust, coal ash are undoubted during this period.Become backwater after the s-shaped water-deflector used collection of condensing water droplet by the indoor rear end of spray section, the user can discharge or use the micro pump reuse, air is sent outside the machine by air supply section through interlude and the cold or bringing-up section of table or after by steam humidification again, place and the air-conditioning of the air of handling well being delivered to requirement through the pipeline that is connected with central air conditioning and air outlet again, reach indoor environment is lowered the temperature or heated up, wholesomeness such as dehumidification or humidification, comfortableness, manufacturability is regulated, and spray section is indoor does not have shower extremely, the spraying water nozzle, cistern and spraying water pump, with domestic, outer other central air-conditioning is compared, reduce installed power, WGR is little, the efficiency of damp and hot exchanging height, save energy consumption and water, reduce noise, solve China textile mills " coal-dust stained yarn " difficult problem simultaneously, with this end in view and the invention a kind of novel multi-point atomizing do not have the nozzle central air conditioning.

Four, structure accompanying drawing of the present invention

Product structure of the present invention sees accompanying drawing for details: accompanying drawing 1 is not chewed the central air conditioning facade view for multi-point atomizing has mouth; Fig. 2 is conventional central air conditioning chamber, a present home and abroad structure facade view; Fig. 3 is a present home and abroad combined type air conditioner typical structure facade view.Wherein sequence number 15 is high-power, major diameter axial fan in the accompanying drawing 2, and sequence number 16 is high-power major diameter axial-flow type mist-spraying cooling fan in the accompanying drawing 3.

Five, embodiment of the present invention and process

It mainly is by regulating air-valve (1) that multi-point atomizing does not have the nozzle central air conditioning, mix wind section (2), the inceptive filtering section that inspection door (3) stainless steel disk filter (4) or filter bag (5) are formed, interlude (6), axial-flow type mist-spraying cooling fan (7) or diagonal flow type mist-spraying cooling fan (8), spray section (9), s-shaped water-deflector used (10), show cold/bringing-up section (11), dry saturated steam heater (12), air supply section (13) and be installed in the guide vane place, impeller rear end of diagonal flow type mist-spraying cooling fan (8) and axial flow mist-spraying cooling fan (7) similarly for the water supply installation section such as (14) common function of impeller spraying and parts be provided with form.Its working forms is to contain dust, particle, the indoor return air of oil smoke trifle in the world matter or fine dust and outdoor new wind are after adjusting air-valve (1) enters the abundant mixing of mixed wind section (2) by the setting air quantity, by with first effect, the middle effect, the form of inferior high efficiency filter is collected in to be made filter bag (5) with nonwoven or other filter material and goes up that above level pressure is artificial to be removed or by being weaving, the stainless steel disk filter (4) of special industry special configuration such as tobacco or multilayer large carrying food-basket formula, curtain-type efficient electrostatic duster is removed continuously, after this inceptive filtering section, comparatively Jie Jing air enters interlude (6), and by the regular high speed shaft streaming mist-spraying cooling fan (7) be installed on spray section (9) the front end end plate or the high speed diagonal flow type mist-spraying cooling fan (8) arranged symmetrically of 4-I0 platform by water supply installation (14) and the draught fan impeller that rotates at a high speed, the broken back of current bump is sprayed the multiply spray that the droplet equivalent diameter only has φ 0.1-0.14mm from multiple spot to indoor rear end, and make the multiply spray carry out the wet exchange of heat simultaneously up to entering spray section (9) rear end in the violent mixing of the full section of the indoor rectangle of spray section (9), a small amount of condensing water droplet becomes backwater after being collected by s-shaped water-deflector used (10), the user can according to circumstances discharge or use the micro pump reuse, air again through interlude (6) and show cold/bringing-up section (11) further cool off heat or by dry steam humidifier (12) humidification after reach the design conditions parameter request, send outside the machine by air supply section (13), again through place and space that the pipeline that is connected with central air conditioning and air outlet are delivered to the air of handling well requirement, to reach indoor environment is lowered the temperature or heated up, wholesomeness such as dehumidification or humidification, comfortableness, manufacturability is regulated, and meets design requirement.

The spray cistern and many row's showers, spraying water nozzle and the bigger centrifugal water pump of power that do not have traditional air conditioning chamber and combined type air conditioner to be had on the indoor base plate of spray section of the present invention (9).Diagonal flow type mist-spraying cooling fan (8) with water supply installation (14) of the similar axial-flow type mist-spraying cooling fan of a cover, not only can be used as the technological design of not having a nozzle central air conditioning with multi-point atomizing of the present invention and select supporting use, can also be as another kind of new invention, having a style of one's own is used for other various places separately.

Multi-point atomizing does not have the nozzle central air conditioning and compares with traditional air conditioning chamber and the combined type air conditioner of the employed various same processing air quantity in public place and various industrial enterprise such as present various megastore, foregoing home and abroad, subway, office building, auditoriums, hotels, have following outstanding advantage: installed power is little, water consumption is few, WGR is little, noise is littler, efficiency of damp and hot exchanging is high, save the energy and water, can also solve in passing simultaneously the difficult problem of China textile mills " coal-dust stained yarn ", be present novel central air conditioning.

Claims (2)

1. a multi-point atomizing does not have the nozzle central air conditioning, be used to regulate indoor air temperature and humidity and cleanliness factor and meet environmental sanitation, comfortableness, technological requirement, has one by regulating air-valve (1) control return air and new wind inlet and well-mixed mixed wind section (2) and through stainless steel disk filtration net (4) or just imitate, the middle effect, the inceptive filtering section that inferior heavy duty detergent filter bag (5) is formed is removed most of dust in the air, particle, oil smoke trifle in the world matter or fine dust are after interlude (6) sprays spray stream that droplet equivalent diameter only have φ 0.1-0.14mm from multiple spot to the indoor back of spray section (9) extreme direction by 4-10 axial-flow type mist-spraying cooling fan (7) that is installed in regular layout symmetrically on rectangle spray section (9) the front end end plate or diagonal flow type mist-spraying cooling fan (8), and spray stream is acutely mixed with air at the full section of rectangle, carry out surrounding when heat is wet to be exchanged, catch oil smoke dirt, dust, the coal ash fine particle, up to the indoor rear end of spray section (9), become the backwater discharging or use the micro pump reuse after condensing water droplet is collected by s-shaped water-deflector used (10), air is sent outside the machine by air supply section (13) through interlude (6) and the cold or bringing-up section (11) of table or after by dry steam humidifier (12) again, by pipeline that is communicated with central air conditioning and air outlet the air of handling well is delivered to the place and the space of requirement again, it is characterized in that: except regular 4-10 platform axial-flow type spraying machine of arrange installing symmetrically (7) or diagonal flow type mist-spraying cooling fan (8) and the indoor rear end of spray section (9) rectangular cross section are installed on spray section (9) front end end plate s-shaped water-deflector used (10), spray section (9) is indoor without any the spray comb, spraying water nozzle and the outer water pump of the machine that is installed in for spraying usefulness, and do not have the cistern class formation on the indoor base plate of spray section (9).
2. a multi-point atomizing as claimed in claim 1 does not have the nozzle central air conditioning, it is characterized in that: use 4-10 platform axial-flow type mist-spraying cooling fan or diagonal flow type mist-spraying cooling fan respectively on spray section (9) front end-plate.
CN2006100593337A 2006-03-03 2006-03-03 Multi-point atomizing central air-conditioner without nozzle CN101029758B (en)

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CN101029758B true CN101029758B (en) 2011-06-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107062457A (en) * 2017-05-06 2017-08-18 江西盛达尔新能源开发有限公司 A kind of fresh air and the devices and methods therefor of room air synchronous purification

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CN102818320B (en) * 2011-06-09 2015-10-07 马利娜 The warm and humid exchange air-conditioning system of a kind of directly evaporation
CN102287884B (en) * 2011-07-22 2013-09-25 西安工程大学 Pipe-type indirect and spray-fan evaporative-cooling air-conditioner set adopting disk filter
RU2499200C2 (en) * 2011-10-13 2013-11-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Юго-Западный государственный университет" (ЮЗ ГУ) Underground street air conditioner
CN102418970B (en) * 2011-10-31 2013-10-23 郑涛 Combined energy-saving air-conditioning unit special for textile mill
CN103234248B (en) * 2013-04-25 2015-09-30 西安工程大学 Forced standpipe indirectly-fluid dynamic spray chamber composite evaporation cooling air conditioning
KR20160027900A (en) * 2014-08-29 2016-03-10 코웨이 주식회사 Air conditioning apparatus and control method thereof
CN104390320A (en) * 2014-11-18 2015-03-04 苏州市海魄洁净环境工程有限公司 Clean room temperature and humidity automatic control device
CN104315606A (en) * 2014-11-24 2015-01-28 苏州医电神空调设备工程有限公司 Pressure-equalizing silencing air conditioning unit
CN104941844A (en) * 2015-07-08 2015-09-30 福建省雾精灵环境科技有限公司 Air-conveying spraying machine
CA2967262C (en) * 2016-06-13 2019-06-11 Condair Group Ag Dual-stage humidifier methods and systems
CN107143995A (en) * 2017-06-06 2017-09-08 深圳沃海森科技有限公司 Central air-conditioning packaged air conditioner filtration equipment for clarifying
CN107990469A (en) * 2017-12-10 2018-05-04 梁靖 purifying humidifier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2085044U (en) * 1991-03-06 1991-09-18 常熟市鼓风机厂 Spraying axial flow fan
US5439618A (en) * 1994-08-09 1995-08-08 Trapasso; Michael A. Turbine water atomizer
JP2001327827A (en) * 2000-05-22 2001-11-27 Matsushita Seiko Co Ltd Anion generator and its controlling method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2085044U (en) * 1991-03-06 1991-09-18 常熟市鼓风机厂 Spraying axial flow fan
US5439618A (en) * 1994-08-09 1995-08-08 Trapasso; Michael A. Turbine water atomizer
JP2001327827A (en) * 2000-05-22 2001-11-27 Matsushita Seiko Co Ltd Anion generator and its controlling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107062457A (en) * 2017-05-06 2017-08-18 江西盛达尔新能源开发有限公司 A kind of fresh air and the devices and methods therefor of room air synchronous purification

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