CN1011536B - System for indirect evaporative cooling of air in interior - Google Patents

Abstract

The device comprises a shell (1) with a bottom groove (2) and a heat exchange surface which is arranged inside the shell (1) and is made into a plurality of vertical clapboards (3) to form passages which consist of a dry section and a wet section. Each dry section (4) and each wet section (5) of adjacent passages at one end of the shell (1) are communicated with each other by a hole (12) that is positioned on the vertical clapboard (3) near the end of the dry section (4). Each adjacent section wet section (5) is provided with a stop cover (13) at the connecting place of a corresponding dry section (4a) at the same time. An inlet pipe (7) of the dry section (4a) of the opposite end of the shell (1) is communicated with the house.

Description

System for indirect evaporative cooling of air in interior

System of the present invention is relevant with air-conditioning, is relevant with system for indirect evaporative cooling of air in interior or rather.

The present invention can be used for the Refrigeration Technique of various buildings and residence manufacture of intraocular miniclimate, also can be used to create essential temperature regime into refrigeration machinery.

In addition, the present invention also can be used to various different materials freezing to the temperature near atmospheric dew point.

The cooling by evaporation device is well-known.In device, outside air is by there being the wet side of water to air evaporation.At this moment, air is cooled in the wet-bulb temperature scope and under this state in the inlet chamber.What play the wet side effect is spray chamber or water cover, and they are made with wood chip, glass fibre, wire, crimped paper or capillarity porous plastics.In this cooling by evaporation device, do not freeze, because the heat content of air does not change.The sensible heat that transmits feedwater has been added in the air with latent heat form (in company with steam) again.Just because of this, the cooling by evaporation device is owing to air humidity in refrigeration processes increases, and its scope of application is very limited.It only can be used for the very low occasion of atmospheric humidity.In addition, the refrigeration scope of cooling by evaporation device also little (can only be cooled to the atmospheric moisture bulb temperature).

The indirect evaporation chiller is well-known.In device, be called wall heat release in water of the circulation of air over-heat-exchanger of main flow, and water is cooled because of evaporation in being called the secondary air flow of secondary air.Here, water is low-temperature receiver, and water dispels the heat because evaporate in secondary air.Therefore, the indirect evaporation chiller should have dry passage and the wet channel that is interspersed.Primary air is by dry passage and do not obtain cooling with not changing inherent moisture therein, then in the inlet chamber.And secondary air is introduced into wet channel and reaches steam-laden therein, and the hot type of drawing primary air then is put in the atmosphere.

The major defect of this indirect evaporation chiller is primary air refrigeration scope very little (can only be cooled to the atmospheric moisture bulb temperature).And in fact, the refrigeration temperature is much taller, because heat conduction loss is arranged when separating the partition of primary air and secondary air.

In the lower a kind of indirect evaporation chiller of the known refrigeration limit, introduce indoor air and can not change humidity ground promptly is significantly less than the atmospheric moisture bulb temperature in the atmospheric dew point temperature limit and obtain cooling with interior.This indirect evaporation chiller has staggered dry passage and wet channel.The outdoor airflow of introducing (total air flow) enters dry passage.In the dry passage outlet, this air-flow is divided into two sections, i.e. primary air and secondary air.Primary air is imported into will cool off indoor, and secondary air enters wet channel along the direction opposite with total air flow.At this moment, secondary air humidity increases, and the heat of drawing primary air causes temperature to raise, and is discharged in the atmosphere then.This device is called regenerative indirect evaporation chiller.Its major defect is that a part of outdoor airflow (secondary air) must turn 180 °, thereby the aerodynamic force loss is very big.In addition, in this device, the refrigeration of room air can only rely on the introducing outdoor air.But, so also cause simultaneously room air pollution and energy consumption to increase.

The indoor chiller of known another kind of indirect evaporation type comprises the housing of being with kerve and a plurality of longitudinal baffles as heat exchange surface that are arranged within this housing.

Half of every dividing plate one side be topped capillary porous material, and second half is topped with damp-proof material, and the another side of same dividing plate is at opposite two halves topped these two kinds of materials respectively.Dividing plate is divided into many passages with the space in the housing, and each passage has dried section of being connected with each other and wet section, and these are done section and wet section and are staggered with dried section of adjacency channel and wet section again simultaneously.At each end of housing, dried section have the air inlet pipe that links to each other with booster and with the indoor blast pipe that communicates.Wet section of each end of housing has blanking cover, and communicates with atmosphere.The course of work of this indirect evaporation chiller is as follows:

Under the effect of booster, outdoor airflow (total air flow) is by dried section of the two ends admission passage of housing.In doing section, air does not change inherent moisture ground and cools off with interior obtaining in the limit of atmospheric dew point temperature.Doing section outlet, a cooling blast separated into two parts: a part does not change the original flow direction, and wet section of admission passage, another part are then in the blast pipe inlet chamber via oneself.This a part of airflow humidity that enters wet section increases, and owing to draws total air flow (by adjacent dried section) heat and heat up, promptly be discharged in the atmosphere under this state thereupon.The same device that has illustrated is compared, and this device has reduced the aerodynamic force loss, because do not need the direction of a part of air-flow is not reversed 180 ° here.But this device still has its critical defect.At first, its refrigeration output is that simple dependence introduced outdoor air, and can not realize indoor air refrigeration processes by room air recirculation.Therefore, outdoor air may cause room air pollution.In addition, because summer, outside air temperature often was higher than indoor temperature, make indoor refrigeration by the mode of introducing outdoor air, compare with air re-circulation refrigeration, energy consumption is increased, the heat exchange surface that needs increases.At last, this indirect evaporation chiller can only be used for air refrigeration.Under the situation of other materials of needs (solid-state, liquid state or gaseous material) refrigeration, can not use this device.

The objective of the invention is to overcome above-mentioned shortcoming.

Basic task of the present invention, be to develop a kind of like this indirect evaporation chiller, correlation between its heat exchange surface can guarantee to improve the room air freezing capacity by reducing energy consumption, reduces room air pollution, and the indoor refrigeration that can realize any way.

Solution to this problem is, the indirect evaporation chiller should comprise the housing of being with kerve and be arranged within this housing, as a plurality of longitudinal baffles of heat exchange surface, dividing plate is divided into many passages with space in the housing, each passage has dried section of being connected with each other and wet section, and these do section and wet section is staggered with the wet section of doing of adjacency channel again simultaneously; Dried section have the air inlet pipe that links to each other with booster and with the indoor blast pipe that communicates, and wet section communicates with atmosphere; According to the present invention, end at housing, it is by being made on the longitudinal baffle, communicating with each other near the hole of dried segment endpoint that each of adjacency channel done section and wet section, each wet section is being equipped with blanking cover with dried section junction corresponding to it simultaneously, and the air inlet pipe that the housing opposite end is done section communicates with indoor.

The blast pipe that passage is done section preferably is equipped with control valve.

A kind of feasible scheme is, passage does that the most handy air conduit links to each other between section and the wet section.

Do the wet section of passage that section is communicated with adjacency channel, the short tube of band control valve preferably is housed.

Just because the system for indirect evaporative cooling of air in interior of recommending has been taked said structure, so just might improve its operating efficiency.

Essence of the present invention is:

Because each of housing one end adjacency channel is done section and wet section communicates with each other, and each adjacent wet section with blanking cover is housed corresponding to its dried section junction, so can be achieved as follows the described course of work.But whole outdoor airflow of refrigeration are being done section exit separated into two parts: a part of air-flow does not change direction, enter wet section of same passage, and another part air-flow enters wet section of adjacency channel.Simultaneously, this back a part of air-flow impel by adjacent dried section outdoor airflow under the situation that humidity remains unchanged dew-point temperature with interior obtain the cooling.Remainder air-flow by the wet section of same passage also has refrigeration output.In order to make full use of this part air-flow, in the indirect evaporation chiller of recommending, the housing end opposite is done the section air inlet pipe and is communicated with indoor.So just, can make indoor air flow enter these and do section, and not change inherent moisture therein and be cooled in the limit of atmospheric dew point temperature.This refrigeration is to realize owing to having taken away heat by that adjacent wet section a part of air-flow.These air-flows of taking away heat are because humidity increases, and temperature raises, and is discharged in the atmosphere subsequently.

So, but in the device cooling chamber of recommendation recirculation air to the limit of atmospheric dew point temperature.So just improved freezing capacity,, reduced energy consumption, reduced essential heat exchange surface areas in the device, also do not existed and introduce the phenomenon that outdoor airflow is polluted room air because air re-circulation refrigeration is compared with relying on the refrigeration of introducing outdoor air.In addition, this device can also be used for other material refrigeration except being used for air refrigeration.

In order to improve the design and use performance of recommendation apparatus, dried section and wet section of passage can be interconnected with air conduit in some cases.Just do like this and can be divided into two parts to whole device, a part can be installed in outdoor, and another part is installed in indoor.Can reduce the noise of air pressurizing unit thus, reduce the volume of indoor mounting portion greatly.

For the indoor refrigeration (introducing outdoor airflow formula, recirculation type or hybrid) that realizes any way, the indoor chiller of indirect evaporation type has considered that the blast pipe by doing section can have control valve.Control valve is opened or is closed to a certain degree, just can regulate the ratio of interior outside cold airflow of inlet chamber or recirculation cold airflow.Under the situation of closing a certain control valve fully, can depend merely on air re-circulation or depend merely on and introduce outer air-flow and realize indoor refrigeration.

At last, in some cases, the indoor chiller of the indirect evaporation type of recommendation is preferably in adjacency channel and does the conduit that the wet section installing of section passage that communicates has control valve.Do like this and both be convenient to the effective refrigeration of room air in the winter time, can utilize outdoor natural cold air to realize for example refrigeration processes of stored food of indoor other materials again.In this case, unnecessary use refrigerator (refrigerator needs power consumption for artificial cooling).

As seen, the indoor chiller of the indirect evaporation type of recommendation is compared with existing similar device, has series of advantages really.It can make room air refrigeration with less energy consumption, does not also cause room air to be introduced the pollution of outdoor air.The necessary heat exchange surface of recommendation apparatus is little than known same device also.In addition, this device can be realized the indoor refrigeration of arbitrary mode.This device structurally can be made two parts, and no matter which part wherein can be installed in outdoor.So just the room noise that causes because of device work can be reduced, and the indoor useful space can be utilized better.At last, the device of recommendation not only can but also can effectively be realized indoor refrigeration in winter in summer.In winter, also can be used for for example refrigeration of food of various different materials.In this case, for instance, preferred device can utilize outdoor natural cold air to play the effect of refrigerator.At this moment it is few that its energy consumption is compared with traditional refrigerator.Refrigerator need consume a large amount of electric power for reaching artificial cooling, and its structure is very unreliable yet.

Be noted that the indoor chiller of preferred indirect evaporation type just not can be used for air refrigeration.Even it also can be used to make the refrigeration within the limit of atmospheric dew point temperature of the solid-state scattered material of any liquid.

Below, the present invention will describe by its specific embodiments and the drawings.

The indoor chiller of indirect evaporation type that Fig. 1 system draws according to the present invention face sketch.

The vertical view of Fig. 2-same device.

The vertical view of the indoor chiller of indirect evaporation type of the another kind of scheme that Fig. 3 system draws according to the present invention.

The indoor chiller of indirect evaporation type shown in Figure 1 is to be made up of housing 1 and the kerve 2 that catchments that is positioned at wherein.Distributing in the housing 1 as the longitudinal baffle of heat exchange surface, dividing plate can be used any material: damp-proof material or capillarity porous material are made.The a part of topped capillary porous material that has of each face of dividing plate 3, another part is topped with damp-proof material, requirement accomplishes that the part of each dividing plate one side is the capillarity porous material, and the opposite one side of same dividing plate then is a damp-proof material with a part, and vice versa.The arrangement of dividing plate 3 forms the vertical passageway, and there is dried section 4 and the wet section 5a(Fig. 2 that is connected with each other each vertical passageway at an end of housing 1), correspondingly the other end at housing has dried section 4a and the wet section 5 that is connected with each other.Dried section 4 and wet section 5a are staggered with adjacency channel dried section 4a and wet section 5 again.Do section 4 and 4a have respectively the air inlet pipe 6 that is communicated with booster 8 and 9 and 7 and with the indoor blast pipe that is communicated with 10 and 11.Wet section 5 and 5a communicate with atmosphere.Each of housing 1 one end adjacency channels done section 4 and wet section 5, by being made on the longitudinal baffle 3, being interconnected near the hole 12 of doing section 4 one ends.Each wet section 5 is being equipped with blanking cover 13 with the junction of dried section 4a corresponding to it, and the air inlet pipe 7 that housing 1 opposite end is done section 4a is communicated with indoor by booster 9.

In addition, in preferred device, the blast pipe 10 and 11 of doing section 4 and 4a can have control valve 14 and 15 respectively.In one of the embodiment of preferred embodiment (Fig. 3), dried section 4 of a passage and a wet section 5a are that air conduit 16 is interconnective.Do section 4 with adjacency channel and be communicated with wet section 5, the blast pipe 17 of band control valve 18 can be housed.

The working method in summer of the indoor chiller of indirect evaporation type is as follows: control valve 18 is opened.Fig. 1 and 2 only illustrates two adjacent passages, and in fact number of channels can change.The work of (control valve 14 is closed fully) under recirculation state fully of indoor chiller is as follows: from the outer gas stream 19 of atmosphere by booster 8 superchargings, enter dried section 4 through air inlet pipe 6, and in doing section, be cooled in the limit of atmospheric dew point temperature, do not change original humidity simultaneously.Doing section 4 exits, air-flow 19 begins shunting.One air-flow 20 enters adjacent wet section 5 through via hole 12, and original flow direction the in another strand air-flow 21 straight edges entered wet section 5a.Outer gas stream 19 passes to the branch air-flow 20 that moves in the opposite direction with the heat of self in adjacent wet section 5 by dividing plate 3 when overdrying section 4.If divide air-flow 20 to be heated to the temperature that enters gas flow temperature near the outside.In addition, owing to the result of wet section 5 wetted surface water evaporates, divide air-flow 20 to increase relative humidity, and under this state, be discharged in the atmosphere through blast pipe 17 extremely near 100%.

By booster 9 superchargings, enter with wet section 5a alternatively distributed dried section 4a through conduit 7 from indoor air stream 22, the outer part air-flow 21 of precooling flows out just in the opposite direction in wet section 5a.At this moment, indoor recirculated air 22 is by dividing plate 3 part air-flow 21 heat releases outside precooling.Thereby divide air-flow 21 to be heated, and relative humidity is increased near 100% owing to section moisture of 5a wetted surface that wets wherein evaporates to a wet section 5a, under this state, be discharged in the atmosphere at last.Take from indoor air-flow 22, through overdrying section 4a the time, be not cooled within the limit of atmospheric dew point temperature with not changing inherent moisture.And under this state, get back to indoor through conduit 11.Like this, promptly carrying out room air recirculation refrigeration.

Only need partly or entirely utilize under the situation of outdoor introducing air refrigeration (having this needs when reaching some special technique conditioned disjunction health care requirement) not needing room air recirculation refrigeration, must partly or entirely open the adjustment doors 14 of doing section 4 blast pipes 10.Simultaneously, correspondingly close (by same degree) wholly or in part and do the adjustment doors 15 of section 4a blast pipe 11.The definite part 23 that has cooled off outer gas stream so, is in blast pipe 10 direct inlet chambers.

Under the situation that the system for indirect evaporative cooling of air in interior branch need be made cell cube (Fig. 3), then must be with dried section 4 of common air conduit 16 interface channels and a wet section 5a.

In many cases, this scheme can simplified structure pattern and installation, and is indoor or outdoor because its each cell cube can be installed in.

Preferred device need not to do any great structure and changes, just can be not only in summer but also all work effectively in the winter time.

The working method in winter of system for indirect evaporative cooling of air in interior is as follows: adjustment doors 18 is closed (Fig. 1 and 2), and outdoor cold airflow 19 is by booster 8 superchargings, is introduced into dried section 4 of passage through conduit 6, enters a wet section 5a then, and is discharged in the atmosphere thus.Meanwhile, indoor air flow 22 is done section 4a through conduit 7 along entering in the opposite direction with outdoor airflow 19 streams by booster 9 superchargings.In doing section 4a, air-flow 22 is owing to carry out the surface heat exchange and refrigeration with outdoor cold airflow by wet section 5a.Then, the recirculated air 22 of refrigeration is got back to indoor via conduit 11.If dividing plate 3 that will the section of wetting 5a is used water-wet, the refrigeration of then indoor recirculation air in doing section 4a is the atmospheric moisture bulb temperature very.Be lower than 0 ° as outside air temperature, then with freezing on the dividing plate 3 of water-wet, ice promotes cold-storage, to be used for the refrigeration of the indoor air flow 22 through doing section 4a recirculation.Without water-wet, then the room air refrigeration limit equals outside air temperature as dividing plate 3.Must be pointed out that the air of refrigeration not only can be used for the room air parameter that keeps essential in doing section 4a, but also can be used for the refrigeration of indoor foodstuff storing.Because like this, in the winter time can be without refrigerator (refrigerator needs power consumption for artificial cooling).

Preferred system for indirect evaporative cooling of air in interior can make indoor effective refrigeration, can not pollute room air again simultaneously.Compare with known same device, use this device capable of reducing energy consumption and reduce in the device and need with each 12-18% of heat exchange surface.The device of recommending both can have been made monomer, also can make the structural shape of many bodies.

In a word, must be pointed out that preferred system for indirect evaporative cooling of air in interior is not only applicable to indoor refrigeration in summer, and be applicable to that keep winter must micro-climate parameter and the needs of refrigeration in the residence in.

Must particularly point out, preferred device not only can be used for air or gas refrigeration in the limit of outdoor air dew-point temperature, and can be used for that any other is solid-state, the refrigeration of liquid state or gaseous material.Importantly, for making certain material refrigeration, this material must be done section along passage as room air and transmit.Liquid towards or gaseous material, this is also uncomplicated.If want solid matter refrigeration, preferably transmit these materials at dispersed or false liquefaction layer state.

Preferred system for indirect evaporative cooling of air in interior can be used in the various different residences of field of air conditioning or indoor refrigeration, also can be used for the refrigeration of different material or the maintenance of the essential temperature parameter of room air.

Claims (4)

1, system for indirect evaporative cooling of air in interior comprises the housing (1) of band kerve (2) and is arranged within the housing (1), a plurality of longitudinal baffles as heat exchange surface, dividing plate is divided into many passages with the space in the housing (1), each passage has dried section (4) and the wet section (5a) that is connected with each other, described dried section (4) and wet section (5a) are staggered with dried section (4a) of adjacency channel and the section (5) that wets again, do section (4 simultaneously, 4a) have respectively and booster (8,9) air inlet pipe (6 of Lian Tonging, 7) and with the indoor blast pipe that is communicated with (10,11), and wet section (5,5a) communicate with atmosphere, it is characterized by: each of housing (1) one end adjacency channel is done section (4) and wet section (5) by opening on longitudinal baffle (3), be interconnected near the hole (12) of doing section (4) terminal, simultaneously each wet section (5) is being equipped with blanking cover (13) with the junction of dried section (4a) corresponding to it, and the air inlet pipe (7) that housing (1) opposite end is done section (4a) communicates with indoor.

2,, it is characterized by passage and do section (4,4a) blast pipe (10,11) control valve (14,15) is housed respectively by the described device of claim 1.

3,, it is characterized by passage dried section (4) and wet section (5a) and be connected with each other with air conduit (16) by the described device of claim 1.

4,, it is characterized by the conduit (17) that the wet section of passage (5) that is communicated with the dried section of adjacency channel (4) is equipped with band control valve (18) by the described device of claim 1.

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