CN111503794A - Multistage efficient evaporative cooling air-conditioning air supply unit - Google Patents
Multistage efficient evaporative cooling air-conditioning air supply unit Download PDFInfo
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- CN111503794A CN111503794A CN202010617203.0A CN202010617203A CN111503794A CN 111503794 A CN111503794 A CN 111503794A CN 202010617203 A CN202010617203 A CN 202010617203A CN 111503794 A CN111503794 A CN 111503794A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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Abstract
The invention discloses a multistage efficient evaporative cooling air-conditioning air supply unit, which comprises a cooling water preparation section and a multistage evaporative cooling section; an air cooler, an evaporative cooling chamber, a wet film and a traction fan are arranged in the multistage evaporative cooling section, and outdoor fresh air is sequentially guided by the traction fan to pass through the air cooler, the evaporative cooling chamber and the wet film and is discharged from an air supply outlet of the multistage evaporative cooling section; an atomizer is arranged in the evaporative cooling chamber, and a cooling water outlet of the cooling water preparation section is connected to the atomizer through a pipeline. The unit can still prepare cooling water with lower temperature even under the condition of high-temperature environment by arranging the multistage evaporation cooling sections so as to meet the requirement of air supply temperature in summer. Meanwhile, the cooling water evaporation capacity is enhanced by adopting the modes of indirect surface cooling of the cooling water, atomized evaporation of the cooling water and the like, and the problem that the traditional evaporative cooling unit is excessively limited by the humidity of outdoor air is greatly weakened.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a multistage efficient evaporative cooling air-conditioning air supply unit.
Background
The general goal of air conditioning technology development is "green, efficient acquisition of a comfortable environment close to the natural state". Evaporative cooling refrigeration technology is widely used because of its environmental protection, high efficiency and economy. Compared with the traditional evaporation-compression or absorption type refrigeration air-conditioning system, the evaporation cooling air-conditioning system can meet the indoor refrigeration requirement only by consuming less energy, and the evaporation cooling refrigeration mode can meet the indoor refrigeration requirement only by needing sufficient water source, so that the refrigeration mode is more environment-friendly and economical.
However, the use conditions of the traditional evaporative cooling refrigeration mode also have certain limitations, and the refrigeration capacity of the air conditioning unit greatly depends on the temperature and humidity state of the outdoor environment. Furthermore, the temperature of the air from evaporative cooling is not easily controlled, and is also dependent on the temperature and humidity levels of the outdoor air. The humidity of the outdoor air increases and the cooling capacity of the evaporative cooling system decreases, and in humid climates, the conventional evaporative cooling methods cannot even cool the supply air to a comfortable temperature.
Disclosure of Invention
The invention aims to provide a multistage efficient evaporative cooling air-conditioning air supply unit, which can realize that the unit can still prepare cooling water with lower temperature even under the condition of high-temperature environment by arranging a multistage evaporative cooling section so as to meet the requirement of air supply temperature in summer. Meanwhile, the cooling water evaporation capacity is enhanced by adopting the modes of indirect surface cooling of the cooling water, atomized evaporation of the cooling water and the like, and the problem that the traditional evaporative cooling unit is excessively limited by the humidity of outdoor air is greatly weakened.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a multi-stage high-efficiency evaporative cooling air-conditioning air supply unit comprises a cooling water preparation section and a multi-stage evaporative cooling section;
an air cooler, an evaporative cooling chamber, a wet film and a traction fan are arranged in the multistage evaporative cooling section, and outdoor fresh air is sequentially guided by the traction fan to pass through the air cooler, the evaporative cooling chamber and the wet film and is discharged from an air supply outlet of the multistage evaporative cooling section;
an atomizer is arranged in the evaporative cooling chamber, and a cooling water outlet of the cooling water preparation section is connected to the atomizer through a pipeline.
Specifically, a cooling water storage disc, an air precooler, a cooling filler, a water distributor and an exhaust fan are sequentially arranged in the cooling water preparation section from bottom to top, and an air inlet butted with the air precooler is formed in the cooling water preparation section;
the cooling water storage disc is communicated with the atomizer, and the cooling water in the cooling water storage disc exchanges heat with the air in the air cooler and the air precooler and then is conveyed to the water distributor through the circulating pump.
Specifically, the cooling water preparation section is arranged above the multistage evaporative cooling section.
Specifically, the traction fan is arranged at the tail end of the multistage evaporative cooling section.
Specifically, a water receiving tray is arranged below the wet film in the multistage evaporative cooling section.
Specifically, the atomizer is in the evaporative cooling chamber from top to bottom sets up a plurality ofly side by side, and a plurality ofly the atomizing spout of atomizer is towards the wet film.
Specifically, the atomizer adopts two fluid atomizers, two fluid atomizers's compressed air inlet passes through compressed air pipe and is connected with high-pressure air source.
Specifically, an electromagnetic pulse valve is arranged on the compressed air pipe.
Specifically, the air precoolers are arranged in pairs on both sides of the cooling water preparation section.
Specifically, the air cooler and the air precooler are arranged in parallel and connected with the cooling water storage disc and the water distributor through a conveying main pipe, and the circulating pump is arranged on the conveying main pipe.
Specifically, the water distributors are uniformly distributed in multiple groups.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention is designed with a multi-stage evaporation cooling process, can still prepare low-temperature cooling water even in an outdoor high-temperature environment, further enables air supply to meet the requirement of indoor air supply temperature of the air conditioner in summer, has high cooling efficiency of the unit, and is green and environment-friendly.
(2) The air precooler is arranged on the inner side of the air inlet of the cooling water preparation section, so that outdoor high-temperature air can be precooled, the moisture content of the air is unchanged, the enthalpy value is reduced, the cooling capacity of the air is improved, and the precooled air and the cooling water with higher temperature are subjected to counter-current evaporation cooling to enhance the heat exchange quantity.
(3) The second stage cooling process of the invention adopts a water mist evaporation heat absorption mode, namely cooling water atomization is realized through a two-fluid atomizer, and primary cooling air and atomized low-temperature cooling water perform full heat and mass exchange, so that the enthalpy value of the air is reduced, the moisture content is increased, and the temperature is further reduced.
(4) The invention strengthens the evaporation capacity of the cooling water by indirect surface cooling of the cooling water, atomization of two fluids of the cooling water and the like, and weakens the problem that the traditional evaporative cooling air-conditioning air supply unit is excessively limited by the humidity of outdoor air.
(5) The wet film arranged in the invention can absorb and store the water mist which is not in time to exchange heat and evaporate in the two-fluid spray, and the stored water can further cool the secondary cold air flowing through. The water mist storage device can also play an effective role in regulating and storing water mist, and prevent the air conditioning unit from floating.
(6) The cooling water in the invention is recycled in the multi-stage evaporation cooling section and the cooling water preparation section, and the whole machine has no problem of waste water discharge.
(7) The cooling water preparation section and the multi-stage evaporative cooling section are integrally designed and manufactured, the unit is compact in structure, the whole machine can be packaged and delivered, the on-site installation time cost is saved, on-site modification caused by design or manufacturing deviation can be avoided, and the unit is attractive in whole.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a multi-stage efficient evaporative cooling air-conditioning blower unit provided by an embodiment of the invention;
wherein: 1-shell, 2-air cooler, 3-atomizer, 4-water pan, 5-wet film, 6-electromagnetic pulse valve, 7-compressed air pipe, 8-traction blower, 9-cooling water storage tray, 10-air inlet, 11-air precooler, 12-cooling filler, 13-water distributor, 14-suction fan, 15-high temperature cooling water pipe section, 16-circulating pump, 17-low temperature cooling water pipe section, 18-fresh air inlet, 19-air supply outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a multi-stage high-efficiency evaporative cooling air-conditioning blower unit comprises a cooling water preparation section and a multi-stage evaporative cooling section; wherein the content of the first and second substances,
the front end of the multi-stage evaporative cooling section is provided with a fresh air port 18, the tail end of the multi-stage evaporative cooling section is provided with an air supply port 19, the interior of the multi-stage evaporative cooling section is sequentially provided with an air cooler 2, an evaporative cooling chamber, a wet film 5 and a traction fan 8, and outdoor fresh air passes through the fresh air port 18, the air cooler 2, the evaporative cooling chamber and the wet film 5 in sequence under the traction action of the traction fan 8 and is discharged from the air supply port 19 at the tail end; the cooling water preparation section is internally provided with a cooling water storage tray 9, an air precooler 11, a cooling filler 12, a water distributor 13 and an exhaust fan 14 from bottom to top in sequence, the cooling water preparation section is provided with an air inlet 10 butted with the air precooler 11, the cooling water storage tray 9 is communicated with the atomizer 3 through a pipeline with an adjusting valve, and cooling water in the cooling water storage tray 9 exchanges heat with air in the air cooler 2 and the air precooler 11 and then is conveyed to the water distributor 13 through a circulating pump 16.
In practical design, the air pre-cooler 11 is disposed inside the air inlet 10 and is used for pre-cooling outdoor high-temperature air entering the cooling water preparation section from the outside, so that the moisture content of the outdoor high-temperature air is not changed, the enthalpy value is reduced, and the cooling capacity of the air is improved. The precooled air enters the cooling filler 12 under the drainage of the extraction fan 14, the cooling water with higher temperature which flows back after multiple heat exchanges in the multistage evaporation refrigeration section is cooled, the water distributor 13 is uniformly distributed above the cooling filler 12, and the water distributor 13 is used for uniformly spreading the cooling water with higher temperature in the multistage evaporation refrigeration section on the cooling filler 12, so that the contact area of the cooling water and the air is increased, and the heat and mass exchange process of the cooling water and the air is enhanced.
In this embodiment, the design has multistage evaporation cooling process, even still can prepare the cooling water of low temperature under outdoor higher temperature environment, and then makes the air supply satisfy air conditioner indoor air supply temperature requirement in summer, and unit cooling efficiency is high, green.
In addition, an air precooler 11 is arranged inside an air inlet 10 of the cooling water preparation section, so that outdoor high-temperature air can be precooled firstly, the moisture content of the air is not changed, the enthalpy value is reduced, the cooling capacity of the air is improved, and the precooled air and the cooling water with higher temperature are subjected to counter-current evaporation cooling to enhance the heat exchange quantity.
It can be understood that, in the practical design, the atomizer 3 adopts a two-fluid atomizer, a compressed air inlet of the two-fluid atomizer is connected with a high-pressure air source through a compressed air pipe 7, the compressed air pipe 7 is provided with an electromagnetic pulse valve 6, and the purpose of adjusting the atomization effect of the cooling water can be achieved by adjusting the opening degree of the electromagnetic pulse valve 6.
In the embodiment of the present application, the air cooler 2 is disposed upstream of the evaporative cooling chamber and is a first-stage cooling device, the medium inside the tubes of the air cooler 2 is cooling water at a lower temperature produced in the cooling water producing section, and the medium outside the tubes is air to be treated.
The two-fluid atomizer arranged next to the air cooler 2 is a second-stage cooling device, the second-stage cooling device adopts a cooling water atomization evaporation heat absorption principle, and primary cooling air and atomized low-temperature cooling water perform sufficient heat and mass exchange to reduce the enthalpy value of the air, increase the moisture content and further reduce the temperature to obtain secondary cooling air. The two-fluid atomizer mixes the cooling water with lower temperature with the compressed air under the action of the compressed air and then atomizes and sprays the mixture to form a large number of extremely fine water drop particles, thereby greatly enhancing the evaporation capacity of the cooling water.
The wet film 5 at the downstream of the two-fluid atomizer is a third-stage cooling device, the wet film 5 absorbs and stores incompletely evaporated water mist in the two-fluid spray, the stored water can further cool secondary cold air flowing through, and the wet film 5 also has an effective regulating and storing effect on the water mist formed by the two-fluid atomizer. Meanwhile, the wet film 5 also plays a role in retaining water, and can effectively prevent the unit from floating.
In the embodiment of the application, the cooling water evaporation capacity is enhanced through the indirect surface cooling of the cooling water, the two-fluid atomization of the cooling water and other modes, and the problem that the traditional evaporative cooling air-conditioning air supply unit is excessively limited by the humidity of outdoor air is weakened.
Specifically, the cooling water preparation section is arranged above the multistage evaporation cooling section, and the cooling water prepared by the cooling water preparation section can automatically flow back to the atomizer 3, so that the energy consumption of the unit can be reduced. A water receiving disc 4 is arranged below the wet film 5 in the multistage evaporation cooling section and used for collecting a small amount of water condensed after the second-stage heat exchange and the third-stage heat exchange, and the wet film 5 is made of a material with good hydrophilicity and good water absorption.
It can be understood that, in order to improve the heat exchange effect, the atomizers 3 are arranged in plurality side by side from top to bottom in the evaporative cooling chamber, and the atomizing nozzles of the plurality of atomizers 3 face the wet film 5.
Specifically, the air precoolers 11 are arranged in pairs at two sides of the cooling water preparation section, and outdoor air enters from the air inlet 10 under the negative pressure traction of the suction fan 14, is precooled by the air precoolers 11, is subjected to heat exchange at the cooling filler 12, and is heated and then is discharged from the suction fan 14 at the top. The air cooler 2 and the air precooler 11 are arranged in parallel and are connected with the cooling water storage tray 9 and the water distributor 13 through a delivery main pipe; the conveying main pipe comprises a high-temperature cooling water pipe section 15 for communicating the air cooler 2 and the air cooler 2 which are arranged in parallel with a water inlet of the water distributor 13, and a low-temperature cooling water pipe section 17 for communicating the air cooler 2 and the air cooler 2 which are arranged in parallel with a water outlet of the cooling water storage disc 9, and the circulating pump 16 is directly arranged on the low-temperature cooling water pipe section 17.
In addition, according to different functional requirements, an air preprocessor can be additionally arranged between the fresh air inlet 18 and the air cooler 2 in the multistage evaporative cooling section, wherein the air preprocessor can be an air filter, a peculiar smell remover, an air purifier or other structures.
In some possible implementation schemes, the cooling water preparation section and the multi-stage evaporation cooling section are integrated in the same machine shell 1, and by the arrangement, the machine set is compact in structure, can realize container loading and delivery of the whole machine, saves the cost of field installation time, can avoid field rectification caused by design or manufacturing deviation, and is attractive in whole.
The working process of the multistage efficient evaporative cooling air-conditioning air supply unit in the embodiment of the application is as follows:
as shown in fig. 1, when the unit is in a cooling state, high-temperature outdoor air enters the multi-stage high-efficiency evaporative cooling air conditioning blower unit from the fresh air inlet 18 under the action of the traction fan 8, and the air to be processed reaches the air cooler 2 after being pretreated by the air preprocessor.
The cooling water flowing in the cooling pipe of the air cooler 2 cools the air flowing through the outer surface to complete the first stage cooling process, and the first stage cooling process makes the moisture content of the air unchanged and the enthalpy value of the air reduced.
The air flow after the initial cooling immediately enters a second-stage cooling stage, a two-fluid atomizer arranged at the downstream of the air cooler 2 is connected with a cooling water pipe and a compressed air pipe 7, and an electromagnetic pulse valve 6 arranged on the compressed air pipe 7 can adjust the amount of compressed air as required. Under the action of the two-fluid atomizer, a large amount of low-temperature cooling water and compressed air are mixed and then atomized and sprayed out to form a large amount of extremely fine water droplets, the water mist is in full collision contact with the primary cooling gas flowing through the water mist, and the water mist and the primary cooling gas undergo a violent heat and mass exchange process during the collision, so that the air temperature is remarkably reduced.
And a small amount of water mist enters the wet film 5 along with the air flow because the water mist is not in time for heat exchange under the action of the air supply. The wet film 5 can absorb and store the water mist which is not completely evaporated in the second stage cooling process, and the stored water can further cool the secondary cold air flowing through. Simultaneously, wet film 5 can also play effectual regulation effect to the water smoke that two fluid sprays formed, prevents that air conditioning unit from appearing the phenomenon of wafing.
Meanwhile, in the first-stage cooling process, cooling water subjected to heat exchange in the air cooler 2 absorbs heat to become cooling water with higher temperature, and the part of the cooling water is conveyed to a cooling water preparation section along a circulation main pipe under the action of a circulation pump 16 to be subjected to cooling treatment. The water mist in the second-stage cooling process absorbs heat and evaporates, water drops formed by condensation of a small amount of residual water mist are stored in the wet film 5, and only a small amount of water flows to the water pan 4 along the outer surface of the wet film 5.
An extraction fan 14, a water distributor 13, a cooling filler 12 and a cooling water storage tray 9 are sequentially arranged in the cooling water preparation section along the height direction, and an air precooler 11 is arranged inside an air inlet 10. Air with higher outdoor temperature enters the cooling water preparation section from the air inlet 10 under the suction action of the suction fan 14, and the air precooler 11 precools the air entering the cooling water preparation section firstly, so that the moisture content of the air is unchanged, the enthalpy value is reduced, and the cooling capacity of the air is improved. The cooled air continues to flow upward into the cooling pack 12. The cooling water with higher temperature is uniformly spread on the cooling filler 12 under the action of the water distributor 13, and is in full countercurrent contact with precooled air for heat exchange, the cooling water with higher temperature is collected in the cooling water storage tray 9 for recycling after being cooled to the cooling water, and the heated air is discharged to the outdoor along with the exhaust fan 14.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a multistage high-efficient evaporative cooling air conditioner air supply unit, prepares section and multistage evaporative cooling section, its characterized in that including the cooling water:
an air cooler, an evaporative cooling chamber, a wet film and a traction fan are arranged in the multistage evaporative cooling section, and outdoor fresh air is sequentially guided by the traction fan to pass through the air cooler, the evaporative cooling chamber and the wet film and is discharged from an air supply outlet of the multistage evaporative cooling section;
an atomizer is arranged in the evaporative cooling chamber, and a cooling water outlet of the cooling water preparation section is connected to the atomizer through a pipeline.
2. The multi-stage high efficiency evaporative cooling air conditioning blower unit of claim 1, further comprising: the cooling water preparation section is internally provided with a cooling water storage disc, an air precooler, a cooling filler, a water distributor and an extraction fan from bottom to top in sequence, and the cooling water preparation section is provided with an air inlet which is butted with the air precooler;
the cooling water storage disc is communicated with the atomizer, and the cooling water in the cooling water storage disc exchanges heat with the air in the air cooler and the air precooler and then is conveyed to the water distributor through the circulating pump.
3. The multi-stage high efficiency evaporative cooling air conditioning blower unit of claim 2, further comprising: the cooling water preparation section is arranged above the multi-stage evaporation cooling section.
4. The multi-stage high efficiency evaporative cooling air conditioning blower unit of any one of claims 1 to 3, wherein: the traction fan is arranged at the tail end of the multistage evaporative cooling section.
5. The multi-stage high efficiency evaporative cooling air conditioning blower unit of any one of claims 1 to 3, wherein: and a water receiving tray is arranged below the wet film in the multistage evaporative cooling section.
6. The multi-stage high efficiency evaporative cooling air conditioning blower unit of any one of claims 1 to 3, wherein: the atomizer is in the evaporative cooling indoor from the top down sets up a plurality ofly side by side, and is a plurality of the atomizing spout of atomizer is towards wet film.
7. The multi-stage high efficiency evaporative cooling air conditioning blower unit of claim 6, further comprising: the atomizer adopts two fluid atomizers, two fluid atomizers's compressed air inlet passes through compressed air pipe and is connected with high-pressure air source.
8. The multi-stage high efficiency evaporative cooling air conditioning blower unit of claim 7, further comprising: and the compressed air pipe is provided with an electromagnetic pulse valve.
9. The multi-stage high efficiency evaporative cooling air conditioning blower unit of claim 2 or 3, wherein: the air precoolers are arranged in pairs on both sides of the cooling water preparation section.
10. The multi-stage high efficiency evaporative cooling air conditioning blower unit of claim 2 or 3, wherein: the air cooler and the air precooler are arranged in parallel and connected with the cooling water storage disc and the water distributor through a conveying main pipe, and the circulating pump is arranged on the conveying main pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617203.0A CN111503794A (en) | 2020-07-01 | 2020-07-01 | Multistage efficient evaporative cooling air-conditioning air supply unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010617203.0A CN111503794A (en) | 2020-07-01 | 2020-07-01 | Multistage efficient evaporative cooling air-conditioning air supply unit |
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| CN111503794A true CN111503794A (en) | 2020-08-07 |
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| CN202010617203.0A Pending CN111503794A (en) | 2020-07-01 | 2020-07-01 | Multistage efficient evaporative cooling air-conditioning air supply unit |
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2020
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| CN2519700Y (en) * | 2001-08-09 | 2002-11-06 | 马钟炜 | Sprayer |
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