CN101344294B - Fresh air collection device for dehumidification by utilizing night sky - Google Patents
Fresh air collection device for dehumidification by utilizing night sky Download PDFInfo
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- CN101344294B CN101344294B CN2008100701294A CN200810070129A CN101344294B CN 101344294 B CN101344294 B CN 101344294B CN 2008100701294 A CN2008100701294 A CN 2008100701294A CN 200810070129 A CN200810070129 A CN 200810070129A CN 101344294 B CN101344294 B CN 101344294B
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Abstract
The invention relates to a new air collection device which utilizes night air for dehumidification. The device comprises a heat exchanger network, a new air collection funnel, a static pressure box and a new air guide pipe; wherein, the heat exchanger network is arranged in the edge of an open end of the new air collection funnel in the state of high in the middle and low in the periphery, the new air collection funnel is arranged above the static pressure box which is communicated with an air supply well in a building construction by a section of air supply pipe; the lower end of the new air guide pipe is fixedly arranged in the static pressure box, the upper end thereof penetrates a funnel pipe in the state of not lower than the intersection of the funnel pipe and the funnel speaker of the new air collection funnel and retaining a water guide clearance with the funnel pipe; the lower end of the funnel pipe seamlessly packages the new air guide pipe and is communicated with a drainage pipe of condensate water. The new air collection device of the invention has simple structure, and the greatest advantage of being capable of providing the new air which is subjected to dehumidification treatment for a room without the need of additional energy source.
Description
Technical field
The present invention relates to new wind is carried out the device of dehumidification treatments.
Background technology
Existing scientific achievement is fully recognized that when indoor relative humidity is higher, the comfortableness of human body and the person's of residence health are all had adverse influence.In addition, high humility also can cause generation dewfall phenomenon on the building interior structure, reduces the intensity of building element.For this reason, people need carry out dehumidification treatments to new wind transporting from outdoor fresh air when (habit claims new wind) to indoor in advance.Areas such as, hot summer and warm winter zone weather cold at Xia Redong are because the outdoor air humidity more needs carry out dehumidification treatments to the new wind of gathering.
The method commonly used of air dewetting at present has: adsorption and dehumidification method, freeze drying method, ventilation drying method (see: " air conditioning " Zhao Rongyi, model deposit to support and wait the 3rd edition the 24th printing in 2007 of Chinese architecture engineering publishing house).Adsorption and dehumidification method (also claiming hygroscopic agent dehumidification method) is divided into wet type liquid absorption dehumidifying (also claiming the liquid desiccant dehumidification) and solid adsorption type dehumidifying (also claiming the solid moisture absorbent dehumidification).In the adsorption and dehumidification processing procedure, be to utilize drying material absorption or absorb moisture to dehumidify.Because moisture discharges the change that condensation heat can cause air themperature,, the process of dehumidifying adds hot-air so being accompanied by usually.Therefore, usually need adopt traditional air-conditioning system that air is cooled off again.Wherein Chang Yong device is a rotary dehumidifier, and it is not influenced by air dew point, and moisture removal is big, is specially adapted to use under the low humidity condition.But, if all dehumidifying only adopts the rotary dehumidifier of solid-state absorption principle to carry out, because its regeneration energy consumption is also bigger, so the equipment cost of this kind scheme and operating cost are all higher.Freeze drying is to utilize refrigerant that the temperature of air is dropped to below the dew-point temperature to dehumidify, and freeze drying is not that effect is relatively good under the condition of very high (RH ≯ 60～65%) to humidity requirement at environment, and stable performance and energy consumption are also lower, use more extensive at present.But in the place of production environment to humidity requirement higher (RH=45 ± 5%), adopting cooling and dehumidifying is uneconomic obviously just; And the device structure complexity, there are problems such as fouling.The ventilation drying method is to utilize the water capacity of outdoor air different with the different moment on the same day in Various Seasonal, analysis-by-synthesis local climate resources characteristic, during some areas conditions permits, sending into the air displacement indoor, that indoor relative humidity is higher by the method for ventilation air that outside relative humidity is lower goes out and reaches the dehumidifying purpose.Yet the ventilation drying method can not really reduce the content of water in air steam, and water capacity is constant in the air, is difficult to guarantee effect on moisture extraction; And when amount is wet in indoor continuous generation, can not reduce relative humidity with temperature-rising method; Add that the stuffy meeting of simple heating descends the room air freshness.So single intensification can not really dehumidify, can not lead to ventilation again, air quality is poor.The general at present mode that adopts nature to combine with force ventilation, but its energy consumption is still bigger.
In sum, existing dehumidification mode and device thereof all have also problem of higher of the higher and operating cost of installation cost.
Summary of the invention
The objective of the invention is, a kind of fresh air collection that only utilizes natural energy to come air is carried out dehumidification treatments is provided.
The solution of the present invention is a kind of fresh air collection that utilizes night sky dehumidifying.This device includes heat exchange net, new elegance collection funnel, plenum chamber and new wind guiding tube.Wherein, the heat exchange net is installed in the opening end edge of this new elegance collection funnel with middle high low state all around, and this new elegance collection funnel is arranged on the top of plenum chamber, and this plenum chamber is by the blowing shaft UNICOM in one section ajutage and the building construction.The lower end of new wind guiding tube is fixedly installed in this plenum chamber, its upper end with the intersection of the filler tube that is not less than this new elegance collection funnel and funnel loudspeaker and and this filler tube between remain with the diversion gap state pass this filler tube; The lower end of this filler tube seamlessly double team live new wind guiding tube and with a condensation water drainage pipe UNICOM.
In the present invention, the heat exchange net is the radiant body (in other words, accepting the acceptor of night sky cold emission at night) to the night sky radiation heat at night, and other parts all are the members that are mated.
Device of the present invention both can be provided with the spaciousness place (being any place that helps accepting night sky radiation) that on the building construction roof, also can be arranged on outdoor ground.At night, the heat exchange net in this device is subjected to the cold emission effect of the night sky, and its surface temperature is reduced.When the heat exchange net is lower than the dew-point temperature of air, at this heat exchange net ambient air just by its cooling (promptly carrying out heat exchange) on the surface of the twine of this heat exchange net, so, dewfall takes place on the heat exchange net surface, be about to airborne hydrogenesis and come out.Like this, just air is dehumidified and lower the temperature.Because after the air cooling, its density increases, so, under the effect of gravity, just flow into plenum chamber from new wind guiding tube.If device of the present invention is arranged on the building construction roof, send into indoorly at last by the blowing shaft in ajutage and the building construction, just give the indoor new wind of having sent to through dehumidification treatments.If device of the present invention be arranged on the spacious place of outdoor ground, then just can give the indoor new wind that passes through dehumidification treatments of having sent to by blower fan.The condensate water that heat exchange is online, to around flow to the inwall of the funnel loudspeaker part of new elegance collection funnel, along the filler tube of this new elegance collection funnel, get rid of from the condensation water drainage pipe at last again.The new wind of process dehumidification treatments in front be sent to indoor after, the space that stays is free air-flow to go into to replenish again; Exchange the effect of heat supply network owing to constantly being subjected to night sky cold emission again, so, just there is the new wind that has passed through dehumidification treatments (following cooling simultaneously) endlessly to be delivered into indoor.Obtained and only utilized natural energy just can carry out the effect of dehumidification treatments air.
Compare with existing dehydrating unit, the present invention is not only simple in structure, and bigger advantage is the energy that does not need especially, just can be the indoor new wind that provides through dehumidification treatments.Obviously, quantity of the present invention being installed should determine according to the demand of building construction; During use, the climatic condition according to outdoor night increases or reduces respective numbers again.It is equally evident that the present invention can according to circumstances use separately, also can according to circumstances use with existing dehydrating unit collocation.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1---structural representation of the present invention
Fig. 2---another kind of structural representation of the present invention
The vertical view of Fig. 3---Fig. 1
Fig. 4---the A-A among Fig. 1 is to profile
Fig. 5---cold emission refrigeration schematic diagram in the night sky of the present invention
The specific embodiment
Utilize the fresh air collection (with reference to figure 1,2,3,4) of night sky dehumidifying.This device includes heat exchange net 1, new elegance collection funnel 2, plenum chamber 6 and new wind guiding tube 4.Wherein, heat exchange net 1 is installed in the opening end edge of this new elegance collection funnel 2 with middle high low state all around, this new elegance collection funnel 2 is arranged on the top of plenum chamber 6, and this plenum chamber 6 is by the interior blowing shaft UNICOM of one section ajutage 61 and building construction (building construction and interior blowing shaft thereof omit and draw).The lower end of new wind guiding tube 4 is fixedly installed in this plenum chamber 6, its upper end with the intersection of the filler tube that is not less than this new elegance collection funnel 2 and funnel loudspeaker and and this filler tube between remain with the diversion gap state pass this filler tube (arrow among Fig. 1,2 under the ajutage 61, new wind after the expression dehumidifying is sent into the path of the blowing shaft in the building construction from this ajutage 61), the lower end of this filler tube seamlessly double team live new wind guiding tube 4 and with condensation water drainage pipe 5 UNICOMs.
It will be apparent to those skilled in that, when the present invention is provided with on the building construction roof, the direct UNICOM of blowing shaft in ajutage 61 and the building construction gets final product, and when the present invention is arranged on the spaciousness place of outdoor ground, should install blower fan additional between the blowing shaft in ajutage 61 and the building construction.
The scheme part in summary of the invention and the introduction of simple principle, can clearly be seen that heat exchange net 1 is the core component to night sky radiation heat (in other words, accepting night sky cold emission at night) at night.Therefore, it preferably selects the good wire netting of heat exchange property for use.For example, wire netting, stainless steel cloth or copper mesh.If select for use nonmetallic materials to make this heat exchange net 1, then should coat the coating that is beneficial to heat exchange on its surface.Obviously,, heat exchange net 1 and the heat exchange of object on every side can be reduced simultaneously again, the coating that this selectivity absorbs (or reflection) can also be all coated on the surface of wire netting or nonmetal net in order to strengthen heat exchange net 1 and night sky radiation heat exchange.It is equally evident that the mesh shape of this heat exchange net 1 and density are to help to the night sky radiation heat and to be design principle to the guiding of condensate water.From helping the guiding angle to condensate water, low formed gradient can be 15 °～45 ° (concrete gradient need be determined according to other requirements of conditioned disjunction) around this heat exchange net 1 middle height.
Further, in the specific implementation,,, can install additional and these new elegance collection funnel 2 adiabatic supplemental support 3 (with reference to figure 1) that are connected in the funnel loudspeaker outside of new elegance collection funnel 2 in order to ensure the stability of new elegance collection funnel 2.
Further say, be further enhanced, promptly allow heat exchange net 1 lip-deep dewfall process, on new elegance collection funnel 2 and plenum chamber 6 outer surfaces, the reflectance coating of the anti-long-wave radiation of one deck is set more fast with easy for making effect of the present invention.Under the situation that adds supplemental support 3, the outer surface of this supplemental support 3 also is provided with the reflectance coating that one deck is prevented long-wave radiation.It will be apparent to those skilled in that this reflectance coating can be the stickup used always the aluminium foil that gets on, and also can be other existing or even novel materials that can reflect long-wave radiation.
Consider from avoiding condensate water to flow to the plenum chamber 6, the upper end of new wind guiding tube 4, should be not less than the filler tube and the funnel loudspeaker of this new elegance collection funnel 2 the intersection---in practice, the funnel loudspeaker can be multiple shapes.If this chamfered edge platform shape that the funnel loudspeaker are still only drawn out as accompanying drawing but not inversed taper platform shape, so, the upper end of this new wind guiding tube 4 just should be not less than the peak of this filler tube and funnel loudspeaker intersection (intersection in promptly drawing).For more reliable, the upper end of this new wind guiding tube 4 can exceed the filler tube of this new elegance collection funnel 2 and the intersection 2mm～30mm of funnel loudspeaker (concrete root of number border situation is factually determined).
Indubitable, for guarantee that the present invention can normally move in available, under the prerequisite of the radiation effects that does not influence or do not influence substantially night sky cold emission exchange heat supply network 1, locate in position, should be device of the present invention and set up the fixing or movable rain-proof shelter 71 (with reference to figure 1,2) that only supports by some root posts 7.Prevent that condensate water directly falls into plenum chamber 6 by new wind guiding tube 4 under gravity on the heat exchange net 1, above new wind guiding tube 4, should set up water fender 8.The size of this water fender 8 and the distance that arrives new wind guiding tube 4 upper ends normally guide new wind degree of being (with reference to figure 1,2,4) with the new wind guiding tube 4 that does not influence.In view of Fig. 1,2,4 as schematic diagram, for averting misconceptions, the support column of this water fender 8 omits and draws.This water fender 8 can be connected the upper end of new wind guiding tube 4 by two to four support columns, and perhaps its support column is connected in the funnel loudspeaker of new elegance collection funnel 2, in a word, as long as water fender 8 is positioned at the top of new wind guiding tube 4.
Again further, because actually, the ponding in the plenum chamber 6 definitely can not avoided.So, when specific design device of the present invention, if ajutage 61 is arranged on the bottom (with reference to figure 1) of plenum chamber 6, so, the upper edge of this ajutage 61 just should be higher than the inner bottom surface of this plenum chamber 6, exceeds 5mm～20mm (concrete numerical value is determined according to other requirements, condition and technology) usually; If ajutage 61 is arranged on the sidewall (with reference to figure 2) of plenum chamber 6, so, the minimum point of the junction of this ajutage 61 and plenum chamber 6 is higher than the inner bottom surface of this plenum chamber 6, also exceeds 5mm～20mm (concrete numerical value is still determined according to other requirements, condition and technology) usually.Simultaneously, also answer the adjutage (with reference to figure 1,2) of connecting band discharging valve 62 in the bottom of this plenum chamber 6.After in plenum chamber 6, ponding being arranged, open discharging valve 62 and bleed off ponding; Close discharging valve 62 then, all send to indoor to guarantee the new wind after the dehumidifying.
For assisting those skilled in the art to understand the present invention better, again principle of the present invention is further introduced below:
Extraatmospheric cosmic space is near absolute zero, and therefore for face of land object, sky is a natural huge freezer, carries out radiation heat transfer with the ground object that is exposed under the night sky.The huge capacity in cosmic space makes it to regard as " black hole " of a heat.If we discharge with form of electromagnetic wave unwanted heat on the ground to the cosmic space, just can reach the purpose of refrigeration.Radiative cooling dehumidifying a kind of cooling and dehumidifying mode that does not consume energy that comes to this.
In Fig. 5, heat exchange net 1 (surface temperature T) and the night sky (night sky temperature T
S) carry out radiation heat transfer, self heat is discharged in the night sky, simultaneously ambient air (temperature T
a) with heat convection mode, other objects (surface temperature T on every side
z) with the support member of radiation heat transfer form, heat exchange net 1---(temperature is T for new elegance collection funnel 2 and other members of linking with it thereof
c) with the heat conduction form heat is passed to heat exchange net 1.Whole system exists dynamic balance constantly, and equation of heat balance is:
Q
1＝Q
2+Q
3+Q
4 (1)
Wherein,
Q
1The radiation heat transfer amount (W) of-heat exchange net 1 and the night sky;
Q
2The heat convection amount (W) of-heat exchange net 1 and air;
Q
3The radiation heat transfer amount (W) of-heat exchange net 1 and ambient surface;
Q
4The heat conduction amount (W) of-heat exchange net 1 and support member.
When electromagnetic wave sees through atmosphere, wherein a part is absorbed by steam, carbon dioxide and ozone in the atmosphere, make the fix density of radiate heat exchange of the night sky and ground object diminish, suppose that the night sky and ground object fix density of radiate heat exchange are constant, the electromagnetism wave energy is all passed through atmosphere, this moment, the equivalent temperature in cosmic space, exoatmosphere was represented with night sky temperature, and it is as follows that it calculates empirical equation.
Night sky temperature computation formula:
T
S-night sky temperature K;
T
a-air themperature K;
e
a-water in air vapor partial pressure power Pa;
t
1-air dew point temperature ℃.
Can be according to formula (2) or formula (3) in the hope of night sky temperature T
S, at air themperature T
a, ambient surface temperature T
z, support temperatures T
cUnder the known situation, the surface temperature T of heat exchange net 1 can calculate by through type (1).If:
T-273＜t
1 (4)
Then heat exchange net 1 can reach the purpose of dehumidifying to the water outlet of cooling off and condense of new wind.
Night sky temperature is at first relevant with the water in air vapor pressure with air themperature, considers the night sky temperature under two kinds of extreme cases, is got by formula (2):
Water in air vapor partial pressure power e
aDuring=0 (kPa), the minimum of a value T of night sky temperature
Min=0.845T
a(5)
E during the water in air vapo(u)rous
a(air themperature is normal temperature T to=3.16～5.5kPa
a=298～308K)
This moment night sky temperature maximum of T
Max=(0.968～0.999) T
a=T
a(6)
Get according to formula (5) and (6):
Sunny night: air themperature t
a=25～35 ℃, night sky temperature T
Min=252～260K=-21 ℃～-13 ℃;
The night that cloud layer gathers: air themperature t
a=25～35 ℃, night sky temperature T
Max=15 ℃～35 ℃.
Even this shows moist night, night sky temperature also is lower than near the dew-point temperature of the air in ground, if do not consider on every side object and air to the heat transfer influence of heat exchange net 1 on the ground, least favorable situation (cloud layer gathers night) also can be carried out cooling and dehumidifying near the air the night ground.
Any one T between above-mentioned two kinds of extreme weather conditions
SDown, want to make that the temperature T of heat exchange net 1 reduces, will make Q exactly
3, Q
4Reduce, can take certain technical measures, by reducing the heat conduction amount Q of heat exchange net 1 and support member
4The radiation heat transfer amount Q of (both are adiabatic to connect), heat exchange net 1 and ambient surface
3(the device part surface adds aluminium foil) reduces heat exchange net 1 temperature T.
Claims (9)
1. utilize the fresh air collection of night sky dehumidifying, it is characterized in that, this device includes heat exchange net (1), new elegance collection funnel (2), plenum chamber (6) and new wind guiding tube (4); Wherein, described heat exchange net (1) is installed in the opening end edge of this new elegance collection funnel (2) with middle high low state all around, this new elegance collection funnel (2) is arranged on the top of described plenum chamber (6), and this plenum chamber (6) is by one section ajutage (61) and the interior blowing shaft UNICOM of building construction; The lower end of described new wind guiding tube (4) is fixedly installed in this plenum chamber (6), its upper end with the intersection of the filler tube that is not less than this new elegance collection funnel (2) and funnel loudspeaker and and this filler tube between remain with the diversion gap state pass this filler tube, the lower end of this filler tube seamlessly the double team residence state new wind guiding tube (4) and with a condensation water drainage pipe (5) UNICOM.
2. according to the described fresh air collection that utilizes night sky dehumidifying of claim 1, it is characterized in that described heat exchange net (1) is a wire netting; High low formed gradient all around is 15 °～45 ° in the middle of this heat exchange net (1).
3. according to claim 1 or the 2 described fresh air collections that utilize night sky dehumidifying, it is characterized in that the funnel loudspeaker outside of described new elegance collection funnel (2) adds and the adiabatic supplemental support (3) that is connected of this new elegance collection funnel (2).
4. according to claim 1 or the 2 described fresh air collections that utilize night sky dehumidifying, it is characterized in that, the reflectance coating of the anti-long-wave radiation of one deck being arranged at the outer surface of described new elegance collection funnel (2) and plenum chamber (6).
5. according to claim 1 or the 2 described fresh air collections that utilize night sky dehumidifying, it is characterized in that the upper end of described new wind guiding tube (4) exceeds the filler tube of described this new elegance collection funnel (2) and the intersection 2mm～30mm of funnel loudspeaker.
6. according to the described fresh air collection that utilizes night sky dehumidifying of claim 3, it is characterized in that, the reflectance coating of the anti-long-wave radiation of one deck being arranged at the outer surface of described new elegance collection funnel (2), supplemental support (3) and plenum chamber (6).
7. according to the described fresh air collection that utilizes night sky dehumidifying of claim 3, it is characterized in that the upper end of described new wind guiding tube (4) exceeds the filler tube of described this new elegance collection funnel (2) and the intersection 2mm～30mm of funnel loudspeaker.
8. according to the described fresh air collection that utilizes night sky dehumidifying of claim 4, it is characterized in that the upper end of described new wind guiding tube (4) exceeds the filler tube of described this new elegance collection funnel (2) and the intersection 2mm～30mm of funnel loudspeaker.
9. according to the described fresh air collection that utilizes night sky dehumidifying of claim 7, it is characterized in that the outer surface in described supplemental support (3) has one deck to prevent the reflectance coating of long-wave radiation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100701294A CN101344294B (en) | 2008-08-18 | 2008-08-18 | Fresh air collection device for dehumidification by utilizing night sky |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100701294A CN101344294B (en) | 2008-08-18 | 2008-08-18 | Fresh air collection device for dehumidification by utilizing night sky |
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| CN101344294B true CN101344294B (en) | 2011-04-20 |
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| CN102628602B (en) * | 2012-04-29 | 2014-12-10 | 贵州大学 | Building air conditioning method device utilizing solution cavity climate |
| CN114151879B (en) * | 2021-12-15 | 2023-04-14 | 西安建筑科技大学 | Portable passive dehumidification system suitable for tent |
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