CN113357693A - Solar air supply system with back angle increased along flow direction - Google Patents

Solar air supply system with back angle increased along flow direction Download PDF

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Publication number
CN113357693A
CN113357693A CN202110012432.4A CN202110012432A CN113357693A CN 113357693 A CN113357693 A CN 113357693A CN 202110012432 A CN202110012432 A CN 202110012432A CN 113357693 A CN113357693 A CN 113357693A
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CN
China
Prior art keywords
wall
air
arc
outlet pipe
air supply
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Withdrawn
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CN202110012432.4A
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Chinese (zh)
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不公告发明人
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Qingdao Qianfu Shengyao Trading Co ltd
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Qingdao Qianfu Shengyao Trading Co ltd
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Priority to CN202110012432.4A priority Critical patent/CN113357693A/en
Publication of CN113357693A publication Critical patent/CN113357693A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/005—Hot-air central heating systems; Exhaust gas central heating systems combined with solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1084—Arrangement or mounting of control or safety devices for air heating systems
    • F24D19/109—Arrangement or mounting of control or safety devices for air heating systems system using solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/06—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated
    • F24D5/10—Hot-air central heating systems; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated with hot air led through heat-exchange ducts in the walls, floor or ceiling
    • 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
    • F24F13/28—Arrangement or mounting of filters
    • 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
    • F24F5/0003—Exclusively-fluid systems
    • 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
    • F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/60—Solar heat collectors integrated in fixed constructions, e.g. in buildings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/272—Solar heating or cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Duct Arrangements (AREA)

Abstract

The invention provides a solar air supply system which comprises a heat collecting device, an outlet pipe, a loop pipe and a user, wherein air is heated in the heat collecting device and is conveyed to the user through the outlet pipe for air supply, then return air enters the heat collecting device through the loop pipe for heating, a second line is formed between a connecting point and an intersection point of a second arc-shaped wall and an inner wall, a plurality of guide plates are arranged on the inner wall of the outlet pipe along the flowing direction of the air, a plurality of guide plates are arranged on the inner wall of the outlet pipe, and an acute angle A1 between the second line and the inner wall is larger and larger along the flowing direction of the air. The invention provides a novel solar air supply system, which reduces the flow resistance by setting the included angle formed between a second line and an inner wall to be larger and smaller, and achieves the basically same temperature equalizing effect on the aspects of reducing the resistance and saving the material cost.

Description

Solar air supply system with back angle increased along flow direction
Technical Field
The invention belongs to the field of solar energy, and particularly relates to a solar energy air supply system.
Background
With the rapid development of modern socioeconomic, the demand of human beings on energy is increasing. However, the continuous decrease and shortage of traditional energy reserves such as coal, oil, natural gas and the like causes the continuous increase of price, and the environmental pollution problem caused by the conventional fossil fuel is more serious, which greatly limits the development of society and the improvement of the life quality of human beings. Energy problems have become one of the most prominent problems in the modern world. Therefore, the search for new energy sources, especially clean energy sources without pollution, has become a hot spot of research.
Solar energy is inexhaustible clean energy and has huge resource amount, and the total amount of solar radiation energy collected on the surface of the earth every year is 1 multiplied by 1018kW.h, which is ten thousand times of the total energy consumed in the world year. The utilization of solar energy has been used as an important item for the development of new energy in all countries of the world. However, the solar radiation has a small energy density (about one kilowatt per square meter) and is discontinuous, which brings certain difficulties for large-scale exploitation and utilization. Therefore, in order to widely use solar energy, not only the technical problems but also the economic competition with conventional energy sources is required.
When the air heating device utilizing solar energy is used for heating air, the air is heated by solar energy or directly, but in the condition, the lower hot fluid is required to naturally convect to the upper part, the heat exchange efficiency is low, so that the air temperature of the heat collection area in the heat collection pipe is different from the air temperature of other areas, the air temperature of different positions in the outlet pipe is different, and the temperature conveyed to different users is different.
Therefore, in order to overcome the defects, the applicant provides a solar air supply system, which aims to achieve uniform outlet temperature by arranging a distributor on an outlet pipe of a heat collector, so as to meet the requirement of further heat exchange and prolong the service life of a product.
This application is through the optimization of structure for the flow resistance of distributor diminishes, and the samming effect reaches the best.
Disclosure of Invention
The present invention provides a new solar air supply system to solve the foregoing technical problems.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a solar air supply system with increased back angle along the flowing direction comprises a heat collecting device, an outlet pipe, a loop pipe and a user, wherein air is heated in the heat collecting device, is delivered to users for air supply through an outlet pipe, and then return air enters a heat collecting device for heating through a loop pipe, characterized in that a guide plate extending from the inner wall of the outlet pipe to the center of the outlet pipe is arranged in the outlet pipe, the guide plate comprises a first arc-shaped wall and a second arc-shaped wall extending from the inner wall, wherein an acute angle formed by a tangent line at the joint of the first arc-shaped wall and the inner wall is smaller than an acute angle formed by a tangent line at the joint of the second arc-shaped wall and the inner wall, the first arc-shaped wall and the second arc-shaped wall are bent towards the air flow direction, and the intersection point of the first wall and the second wall is positioned at the downstream of the joint of the first arc-shaped wall and the inner wall and is positioned at the downstream of the joint of the second arc-shaped wall and the inner wall; the air conditioner is characterized in that a second line is formed between the connecting point of the second arc-shaped wall and the inner wall and the intersection point, a plurality of guide plates are arranged on the inner wall of the outlet pipe along the flowing direction of air, a plurality of guide plates are arranged on the inner wall of the outlet pipe, and the acute angle A1 between the second line and the inner wall is larger and larger along the flowing direction of air.
Preferably, the included angle a1 increases with increasing magnitude along the direction of air flow.
Preferably, the first and second arcuate walls are arcs, wherein the arc diameter of the first arcuate wall is less than the arc diameter of the second arcuate wall.
Preferably, the length of the first arcuate wall is greater than the length of the second arcuate wall.
Preferably, the user is a multi-storey building, the building comprising walls.
Preferably, the wall body comprises a transparent plate and a preheating pipe, the preheating pipe extends from the upper part to the lower part of the wall body, the preheating pipe is provided with a branch, the inlet of the branch extends into a room on the inner side of the wall body, and the inlet of the branch is provided with a fan.
Preferably, the length L2 of the first line between the connection point and the intersection point of the first arc-shaped wall and the inner wall, the length L1 of the second line between the connection point and the intersection point of the second arc-shaped wall and the inner wall, the included angle between the first line and the inner wall is a2, the included angle between the second line and the inner wall is a1, the distance S between adjacent wedge-shaped structures in the flowing direction of air, namely the distance between the central points of the adjacent guide plates on the inner wall, and the central point is the central point of the connection line of the connection points of the first arc-shaped wall, the second arc-shaped wall and the inner wall, and the following requirements are met:
n = a-b × ln (M), wherein N = (L1+ L2)/S, M = sin (a2)/sin (a 1); ln is a function of the logarithm of the number,
0.263<a<0.264，0.0829<b<0.0831。
compared with the prior art, the invention has the following advantages:
1) this application is through setting up the contained angle that forms between second line and the inner wall and getting bigger and bigger to alleviate the flow resistance, in the degree that the resistance reduces and material cost saves, samming effect reach basically the same effect.
2) The invention provides a novel heat-collecting air supply system, wherein a guide plate is arranged in an air outlet pipe, so that a part of air flows along the guide plate and is guided to the opposite direction, and the air is fully mixed with the air entering from the opposite direction, thereby realizing uniform temperature of the air, realizing the requirement of further heat exchange and prolonging the service life of a product.
3) According to the invention, through carrying out extensive research on the heat exchange rule caused by the change of each parameter of the guide plate, the guide plate structure of the heat exchanger is optimized under the condition of meeting the flow resistance, so that the optimal outlet air temperature equalizing effect is achieved.
4) According to the invention, through reasonable layout, the guide plate structures in adjacent rows are arranged in a staggered manner, so that air is further fully mixed, and the temperature is uniform.
5) The invention further promotes the full mixing by setting the distribution change of parameters such as the size, the number angle and the like of the guide plate along the flowing direction of the fluid.
6) According to the invention, the distance of the guide plate is widely researched, a formula of the minimum distance is designed, the temperature-equalizing mixing requirement is fully met, the problems of uneven mixing and increased flow resistance are avoided, and the optimal outlet air temperature-equalizing effect is achieved.
Drawings
Fig. 1 is a schematic structural view of an air supply system of the present invention.
Fig. 2 is a schematic view of the construction wall structure of the present invention.
Fig. 3 is an axial sectional view of the outlet pipe of the present invention with baffles.
Figure 4 is a schematic size view of the outlet duct arrangement baffle of the present invention.
Fig. 5 is a schematic perspective view of 1 baffle per layer.
Fig. 6 is a schematic perspective view of 3 baffles per layer.
Fig. 7 is a schematic perspective view of 1 baffle per layer.
Fig. 8 is an exploded perspective view of the outlet tube side of fig. 7.
The reference numbers are as follows:
the heat collecting device comprises a heat collecting device 1, a guide plate 2, a first arc-shaped wall 21, a second arc-shaped wall 22, a crossing point 23, an outlet pipe 5, an outlet pipe 6, a user and a loop pipe 7.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In this document, "/" denotes division and "×", "denotes multiplication, referring to formulas, if not specifically stated.
Fig. 1 discloses a solar air supply system, which comprises a heat collecting device 1, an outlet pipe 5, a loop pipe 7 and a user 6, wherein air is heated in the heat collecting device, is conveyed to the user 6 through the outlet pipe 5 for air supply, and then is returned to the heat collecting device through the loop pipe 7 for heating.
Preferably, the loop pipe includes a preheat pipe 36.
As an improvement, the user is a multi-storey building, the building comprising walls. As shown in fig. 2, the wall body comprises a transparent plate 35, a preheating pipe 36, a heat insulating layer 37, an outer bearing wall 38, a heat insulating layer 39, an inner bearing wall 43 and a ventilation part 44; the transparent plate 35, the preheating pipe 36 and the heat insulating layer 37 are arranged on the outer surface of the outer bearing wall 38, the transparent plate 35 is arranged outside the preheating pipe 36, the heat insulating layer 37 is arranged on the inner side of the preheating pipe 36, and the heat insulating layer 39 is arranged between the outer bearing wall 38 and the inner bearing wall 43; the ventilation member 44 is disposed on the inner surface of the inner bearing wall 43; the inlet at the upper part of the ventilation part 44 is connected with the solar heat collector 1, the preheating pipe 36 extends from the upper part to the lower part of the wall body, the preheating pipe is provided with a branch, the inlet of the branch extends into the room at the inner side of the wall body, and the inlet of the branch is provided with a fan.
The hot air heated in the heat collector is delivered to the room through the ventilation part 44, and the cold air in the room is sucked into the preheating pipe by the fan and then enters the heat collecting device for heating.
As an option, the upper outlet of the preheating pipe 36 is connected with the solar collector 1. The preheating pipe 36, which is preferably located uppermost, is connected to the solar collector.
Preferably, the ventilation means may take the form of a grille.
Preferably, the ventilation component also includes a branch which extends into the building. Preferably, the branch is provided with a valve, and the amount of air entering each household can be controlled independently.
Air in the solar heat collector enters the ventilation part 44 through an upper inlet of the ventilation part 44 after being heated, the ventilation part 44 supplies hot air to the interior of the building, so that a heating effect is achieved, then the air in the interior of the building enters a lower inlet of the preheating pipe 36 through the fan, then enters the preheating pipe, absorbs solar energy in the preheating pipe, rises in temperature, and then enters the heat collector 1 through an upper preheating pipe outlet to be heated, so that a circulating system is formed. Thereby providing an air conditioning effect.
Preferably, a lens is disposed on the transparent plate 35 for focusing solar energy on the preheating tube. Through setting up lens, can focus the heat gathering to the preheater tube with shining the heat on the transparent plate to further improve the utilization efficiency of solar energy.
According to the invention, the transparent plate, the preheating pipe and other devices are arranged, so that air entering the heat collector can be preheated first, and the reasonable utilization efficiency of the solar energy utilization degree is improved.
Preferably, the ventilation member is a flat tubular member having a flat side parallel to the wall body and a plurality of ventilation openings formed in the flat side facing the wall body. The flat side of the flat tube is parallel to the wall body, so that the heat exchange surface of the flat side faces the interior of a building, and the heat utilization efficiency is improved.
Preferably, the ventilation member comprises an air inlet connected to the outside of the wall, the air inlet being provided with an external fan. The air inlet side is provided with a temperature sensor. In summer, the solar system stops carrying out hot air conveying indoors, the temperature is high in the daytime and relatively low at night, when the temperature at night reaches a proper temperature, such as a proper temperature of a human body, for example, about 18-25 ℃, the temperature sensor transmits a received temperature signal to the controller, and the controller controls the external fan to start working and conveys outside low-temperature air into a room for cooling. Therefore, the invention realizes the bidirectional regulation function of the indoor temperature in summer and winter, is economical and practical and meets the requirement of environmental protection.
Preferably, the inlet of the heat collecting device further comprises a filtering module, the filtering module is arranged between the fluid module and the heat storage module and used for filtering inlet air, or the filtering module is arranged in the fluid module and preferably arranged in the air inlet channel, and as the preference, the filtering module is sequentially provided with a primary filter, an electrostatic dust collector, an activated carbon filter and a high-efficiency filter.
Preferably, the primary filter is one or more of non-woven fabric, nylon mesh, fluffy glass fiber felt, plastic mesh or metal wire mesh. Preferably, the primary filter is of a composite structure at least comprising two layers, and the arrangement directions of the skeleton structure fibers of the filter screen in the composite structure of the two adjacent layers are mutually perpendicular, so that the filtering effect can reach medium-efficiency filtering.
The electrostatic dust collector comprises an electrostatic dust collection section, the electrostatic dust collection section comprises two stages, the two stages are a first stage and a second stage along the flowing direction of wind, and the electric field intensity of the first stage is different from that of the second stage. Further preferably, the electric field strength in the second stage is smaller than the electric field strength in the first stage. Mainly because the large particles contained in the air are reduced by the dust removal in the first stage, and therefore by reducing the electric field strength, it is possible to achieve substantially the same effect with less energy.
Preferably, a plurality of dust collecting polar plates are arranged in each stage, and the dust collecting polar plates are parallel to each other; a plurality of corona electrodes are uniformly arranged between the dust collecting polar plates.
Preferably, the system further comprises a controller, the inlet of the electrostatic dust removal section is provided with a PM10 dust detector for detecting the concentration of PM10 at the inlet position, the PM10 dust detector is in data connection with the controller, and the controller automatically controls the strength of the electric field according to the detected concentration of PM 10.
The controller automatically increases the intensity of the electric field if the detected concentration of PM10 becomes high, and automatically decreases the intensity of the electric field if the detected concentration of PM10 becomes low.
Through foretell intelligent control, the size of electric field is controlled according to particulate matter concentration automatically to realize the intelligent operation of system, but also can reach the requirement of energy saving, further improve the pollutant desorption effect of flue gas.
Preferably, the first stage inlet and the second stage inlet are respectively provided with a PM10 dust detector, and the controller independently controls the electric field intensity in the first stage and the second stage according to the data detected by the PM10 dust detectors of the first stage inlet and the second stage inlet.
The electrostatic precipitator comprises an electrostatic/ultrasonic coupling precipitation section, and preferably, the electrostatic/ultrasonic coupling precipitation section is divided into two stages. An ultrasonic wave generating end is arranged in the device and is connected with an ultrasonic generator to establish an ultrasonic field.
Preferably, a pm2.5 detector is arranged at the inlet section of the electrostatic/ultrasonic coupling dust removal section and used for detecting the concentration of pm2.5 at the inlet position, the pm2.5 detector is in data connection with a controller, and the controller automatically controls the power of the ultrasonic generator according to the detected pm2.5 concentration.
The controller automatically boosts the power of the sonotrode if the detected PM2.5 concentration becomes high, and automatically reduces the power of the sonotrode if the detected PM2.5 concentration becomes low.
Through the intelligent control, the power of the ultrasonic generator is automatically controlled according to the concentration of the particulate matters, so that the intelligent operation of the system is realized, the requirement of saving energy can be met, and the pollutant removal effect of the flue gas is further improved.
Preferably, the electrostatic/ultrasonic coupling dust removal section is divided into two stages, PM2.5 detectors are respectively arranged at inlets, and the controller respectively and independently controls the power of the ultrasonic generators in the third stage and the fourth stage according to data detected by the PM2.5 detectors at the inlets of the two stages.
Preferably, the activated carbon filter comprises a catalyst MnO capable of catalytically decomposing ozone2/CuO、CuO/Ni、MnO2/Pt、Fe3O4/CuO、Ag/Fe2O3、Ni/SiO2One or more of (a).
Preferably, the high-efficiency filter is made of one or more of PP filter paper, glass fiber paper and PET filter paper.
As a modification, the heat collecting device 1 is connected with an outlet pipe 5, as shown in fig. 3, a baffle 2 extending from an inner wall 51 of the outlet pipe to the center of the outlet pipe is arranged in the outlet pipe 5, the baffle 2 comprises a first arc-shaped wall 21 and a second arc-shaped wall 22 extending from the inner wall, wherein an acute angle formed by a tangent line at the connection position of the first arc-shaped wall 21 and the inner wall 51 and the inner wall is smaller than an acute angle formed by a tangent line at the connection position of the second arc-shaped wall 22 and the inner wall, the first arc-shaped wall 21 and the second arc-shaped wall 22 extend in a bending manner towards the air flowing direction, and the intersection point 23 of the first arc-shaped wall 21 and the second arc-shaped wall 22 is located downstream of the connection position of the first arc-shaped wall 21 and the inner wall 51 and is located downstream of the connection position of the second arc-shaped wall 22 and the inner wall. The shape of the baffle 2 is a shape formed by rotating the first arc wall 21 and the second arc wall 22 and the inner wall along the outlet pipe axis.
The invention provides a method for controlling the temperature of air in an air outlet pipe, which is characterized in that a guide plate is arranged in the air outlet pipe, so that a part of air flows along the guide plate and is guided to the opposite direction, and is fully mixed with air entering in the opposite direction, thereby realizing uniform temperature of the air, ensuring that the temperature of the air conveyed to different users is basically the same, and avoiding different temperatures of different users.
The air deflector is provided with the first arc-shaped wall and the second arc-shaped wall respectively, so that the air disturbance effect is better, the area of the air deflector contacting the inner wall is increased, and the stability is improved. And through setting up the second arc wall for air that the opposite direction water conservancy diversion was come also can be along the crooked direction motion of second arc wall direction, increases the buffering, reduces flow resistance.
Preferably, the first arc-shaped wall 21 and the second arc-shaped wall 22 are arcs, wherein the arc diameter of the first arc-shaped wall 21 is smaller than the arc diameter of the second arc-shaped wall 22.
The first wall and the second wall are in the shape of circular arcs, so that the air flow resistance is smaller, and the air flow is easy to flow to the opposite side for mixing.
Preferably, the tangent to the first curved wall 21 at the location of the intersection point 23 forms an angle of 30-60 deg., preferably 45 deg., with the axis of the outlet tube. By providing this angle, fluid can be quickly directed to the opposite downstream location, and flow resistance can be further reduced.
Preferably, as shown in fig. 3, a plurality of layers of baffles 2 are arranged on the inner wall of the outlet pipe 5 along the flowing direction of the air, and the baffles of adjacent layers are distributed in a staggered mode. Through the staggered distribution of the guide plates in adjacent rows, air can fully move to opposite positions mutually in the outlet pipe, and the full and uniform mixing is ensured. Fig. 3 shows one per layer of baffles. Of course, more than one baffle, for example 3 baffles, can be provided per layer.
Preferably, the distance between the intersection point and the inner wall of the outlet pipe is 0.3 to 0.5 times, preferably 0.4 times the diameter of the outlet pipe. With this arrangement, the air has less flow resistance on thorough mixing.
Preferably, the length of the first arcuate wall is greater than the length of the second arcuate wall.
Preferably, the total radian of the circular arc connecting the guide plate and the inner wall in the same layer is 150-180 degrees. This parameter set ensures thorough mixing while meeting the resistance requirements. For example, fig. 2, 4, and 6 show one for each layer of baffles, where the total arc of the one is 150 and 180. Of course, multiple baffles may be provided for each layer, for example, three baffles per layer in fig. 5 may be provided with a total arc of 150 and 180.
Preferably, the A layers of guide plates are provided with a plurality of blocks, the A guide plates are arranged at intervals, the A guide plates are arranged at equal intervals, the B layers are adjacent rows of the A layers, and the B layers of guide plates are arranged at the intervals of the A layers when viewed from the flowing direction. The positions of the guide plates of the adjacent layers are complementary, so that the air can fully move to the opposite position in the outlet pipe, and the full and uniform mixing is ensured. It should be noted that the layer a and the layer B are not specifically designated herein, and A, B is only used as a distinction and is used as an adjacent layer.
Preferably, a plurality of baffles are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the distribution density of the baffles is smaller along the flowing direction of the air. Because the air is mixed better and better along with the continuous movement of the air, the distribution density is required to be set to be smaller and smaller so as to reduce the flow resistance, and the temperature equalizing effect achieves the basically same effect on the aspects of reducing the resistance and saving the material cost.
Preferably, the distribution density of the baffles is increasing with decreasing magnitude along the flow direction of the air. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of air movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Preferably, a plurality of baffles are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the size of the baffles is smaller along the flowing direction of the air. Because the air is mixed better and better along with the continuous movement of the air, the air is required to be arranged to be smaller and smaller in size so as to reduce the flow resistance, and the temperature equalizing effect achieves the same effect in the aspects of reducing the resistance and saving the material cost.
Preferably, a plurality of guide plates are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the size of the guide plates is gradually reduced along the flowing direction of the air. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of air movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Through a large amount of numerical simulation and experimental study discovery, the angle and the size of guide plate have very big influence to heat transfer and misce bene, guide plate and inner wall contained angle are less than normal, can lead to mixing the effect variation, and lead to the guide plate oversize, influence flow resistance, the contained angle is bigger than normal, it is not good to lead to stirring the fluid effect, the resistance grow, mix the effect variation, the interval of guide plate is too big, can lead to the vortex effect not good, the interval undersize can lead to increasing the movement resistance, consequently, this application has obtained nearest guide plate structure size optimization relation through a large amount of data simulation and experiments.
Preferably, the length L2 of the first line between the connection point of the first arc-shaped wall and the inner wall and the intersection point 23, the length L1 of the second line between the connection point of the second arc-shaped wall and the inner wall and the intersection point 23, the acute angle between the first line and the inner wall is a2, the acute angle between the second line and the inner wall is a1, the distance S between adjacent baffles along the flow direction of the air (for example, the distance between two adjacent baffles on the upper side of fig. 3 is S), that is, the distance between the center points of the adjacent baffles on the inner wall, the center point is the middle point of the connection line between the connection points of the first arc-shaped wall and the second arc-shaped wall and the inner wall, and the following requirements are met:
n = a-b × ln (M), wherein N = (L1+ L2)/S, M = sin (a2)/sin (a 1); ln is a function of the logarithm of the number,
0.263<a<0.264，0.0829<b<0.0831；
preferably, 0.25< M <0.75,0.28< N <0.35,45< a1<75 °, 15< a2<45 °,400< S <500mm, 70< L2<130mm, 30< L1<90 mm.
The optimal design requirements of the deflector structure can be met by the above types. The structural optimization formula is a main improvement point of the invention, is the most optimized formula which is researched by a large number of numerical simulations and experiments, and is not common knowledge in the field.
Further preferably, a =0.2634 and b = 0.0830.
It is found in data simulation and experiment that the interval between the guide plate must be greater than certain distance, otherwise can lead to the fluid to guide to opposite direction through last guide plate, but if the interval undersize between the guide plate, can lead to the air to flow opposite, still not fully be full of whole pipeline, set up the guide plate this moment, play not mixed effect, the guide plate only plays a baffling board effect, does not guide the effect of mixing, can only increase flow resistance. Therefore, the design scheme of the minimum distance of the guide plate is provided through a great deal of research, and the guide plate has certain guiding significance for the design of the guide plate.
The perpendicular point of the intersection point 23 on the inner wall, the line formed by the intersection point and the perpendicular point is a third line, the distance between the connecting point of the first arc-shaped wall and the inner wall and the perpendicular point is H, the acute angle formed by the first line and the third line is A3, the acute angle formed by the tangent line of the first arc-shaped wall at the intersection point position and the axis of the outlet pipe is A4, the inner pipe diameter of the outlet pipe is R, and the distance S is designed in the following way:
(S/H)>a+b*Ln (T)，(S/R)2>c+d*Ln (T)；
wherein T = sin (A3)/sin (a4), 2.74< a <2.75,17.4< b <17.5, 1.998< c <1.999, 3.431< d <3.432,
30< A3<70 °, 20< a4<60 °; preferably 1.07< T < 1.30;
preferably, a =2.743, b =17.47, c =1.9984, and d = 0.4316.
According to the invention, through a large number of experiments and numerical simulation, the minimum design distance of the guide plate is obtained, the resistance is reduced through the design distance, and meanwhile, the guide plate and the guide plate can be fully mixed.
Preferably, a plurality of baffles are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the included angle of A2 is smaller and smaller along the flowing direction of the air. Because along with the continuous motion of air, the mixed degree of air is better and better, consequently need set up the contained angle and diminishes to alleviate flow resistance, in the degree that the resistance reduces and material cost saves, the samming effect reach basically the same effect.
Preferably, the included angle a2 increases with decreasing magnitude along the direction of air flow. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of air movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Preferably, a plurality of baffles are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the included angle of A4 is smaller and smaller along the flowing direction of the air. Because along with the continuous motion of air, the mixed degree of air is better and better, consequently need set up the contained angle and diminishes to alleviate flow resistance, in the degree that the resistance reduces and material cost saves, the samming effect reach basically the same effect.
Preferably, the included angle a4 increases with decreasing magnitude along the direction of air flow. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of air movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Preferably, a plurality of baffles are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the total radian of the arcs connecting the baffles and the inner wall on the same layer along the flowing direction of the air is smaller and smaller. Because the mixing degree of the air is better and better along with the continuous movement of the air, the flowing space which needs to be arranged is larger and larger so as to reduce the flowing resistance, and the temperature equalizing effect achieves basically the same effect on the aspects of reducing the resistance and saving the material cost.
Preferably, the total radian of the arc connecting the guide plate and the inner wall of the same layer is gradually reduced and increased along the flowing direction of the air. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of air movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Preferably, a plurality of baffles are arranged on the inner wall of the outlet pipe along the flowing direction of the air, and the included angle of A1 is larger along the flowing direction of the air. Because the mixing degree of the air is better and better along with the continuous movement of the air, the included angle needs to be set to be larger and larger so as to reduce the size, the flowing resistance is reduced, and the temperature equalizing effect achieves the basically same effect on the aspects of reducing the resistance and saving the material cost.
Preferably, the included angle a1 increases with increasing magnitude along the direction of air flow. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of air movement, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (5)

1. A solar air supply system with increased back angle along the flowing direction comprises a heat collecting device, an outlet pipe, a loop pipe and a user, wherein air is heated in the heat collecting device, is delivered to users for air supply through an outlet pipe, and then return air enters a heat collecting device for heating through a loop pipe, characterized in that a guide plate extending from the inner wall of the outlet pipe to the center of the outlet pipe is arranged in the outlet pipe, the guide plate comprises a first arc-shaped wall and a second arc-shaped wall extending from the inner wall, wherein an acute angle formed by a tangent line at the joint of the first arc-shaped wall and the inner wall is smaller than an acute angle formed by a tangent line at the joint of the second arc-shaped wall and the inner wall, the first arc-shaped wall and the second arc-shaped wall are bent towards the air flow direction, and the intersection point of the first wall and the second wall is positioned at the downstream of the joint of the first arc-shaped wall and the inner wall and is positioned at the downstream of the joint of the second arc-shaped wall and the inner wall; the air conditioner is characterized in that a second line is formed between the connecting point of the second arc-shaped wall and the inner wall and the intersection point, a plurality of guide plates are arranged on the inner wall of the outlet pipe along the flowing direction of air, a plurality of guide plates are arranged on the inner wall of the outlet pipe, and the acute angle A1 between the second line and the inner wall is larger and larger along the flowing direction of air.
2. The solar air supply system of claim 1, wherein the included angle a1 increases with increasing magnitude along the direction of air flow.
3. The solar powered air supply system of claim 1, wherein the user is a multi-story building, the building including walls.
4. The solar air supply system of claim 3, wherein the wall includes a transparent panel, a pre-heat pipe extending from an upper portion to a lower portion of the wall, the pre-heat pipe having a bypass inlet extending into the chamber inside the wall, the bypass inlet having a fan.
5. A solar air supply system comprises a heat collecting device, an outlet pipe, a loop pipe and a user, wherein air is heated in the heat collecting device and is conveyed to the user through the outlet pipe for air supply, and then return air enters the heat collecting device through the loop pipe for heating.
CN202110012432.4A 2021-01-06 2021-01-06 Solar air supply system with back angle increased along flow direction Withdrawn CN113357693A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114136013A (en) * 2021-10-25 2022-03-04 青岛科技大学 Intelligent control solar hot air system
CN114136012A (en) * 2021-10-25 2022-03-04 青岛科技大学 Solar hot air system capable of controlling flow

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114136013A (en) * 2021-10-25 2022-03-04 青岛科技大学 Intelligent control solar hot air system
CN114136012A (en) * 2021-10-25 2022-03-04 青岛科技大学 Solar hot air system capable of controlling flow

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Application publication date: 20210907