CN108224623B - Passive fresh air system using dry air energy and solar energy as driving energy - Google Patents

Abstract

The invention discloses a passive fresh air system taking dry air energy and solar energy as driving energy sources, which comprises a passive evaporative cooling air tower and a solar chimney, wherein the passive evaporative cooling air tower and the solar chimney are respectively arranged on two opposite sides of a house, an indoor air inlet communicated into a room is reserved at the bottom of the passive evaporative cooling air tower close to the house wall, the solar chimney is arranged at the upper part of the house wall, and an indoor air outlet is reserved at the bottom of the solar chimney close to the house wall. The passive fresh air system combines the evaporative cooling technology and the solar energy technology, and cool and fresh air is sent into a room by means of natural convection and is exhausted in an air flow organization mode of lower air sending and upper air discharging, so that healthy and comfortable fresh air is enjoyed, and the cost of high energy consumption is avoided.

Description

Passive fresh air system driven by dry air and solar energy

technical field

The invention belongs to the technical field of air conditioning equipment, and relates to a passive fresh air system using dry air energy and solar energy as driving energy.

Background technique

In daily life, we spend more than 70% of our time indoors, and the urban population spends even more than 90% of the time indoors. According to relevant data, the concentration of indoor air pollutants is generally 2 times that of outdoor pollutants. -5 times, sometimes even tens or hundreds of times. Therefore, the demand for fresh air systems has increased sharply, but the existing fresh air systems have many problems, such as: high energy consumption caused by long-term operation, limited application caused by cumbersome piping, frequent filter replacements that are not environmentally friendly and heat A series of problems such as low recycling efficiency restrict the development of energy conservation, environmental protection, facilitation and high efficiency of fresh air systems. Therefore, the application of renewable energy to realize passive fresh air system coincides with the national sustainable development strategy.

Most areas in my country, especially the northwest region, have unique natural conditions, large weather span, sufficient sunlight, hot and dry summer, and abundant renewable energy such as dry air energy and solar energy, which are highly applicable to evaporative cooling technology and solar energy technology. Area.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a passive fresh air system with dry air energy and solar energy as driving energy, combining evaporative cooling technology and solar energy technology, relying on natural convection to make the air flow through the air flow organization form of the bottom and the upper row, and the energy consumption is low. .

The technical scheme adopted in the present invention is that a passive fresh air system using dry air energy and solar energy as driving energy includes passive evaporative cooling wind towers and solar chimneys respectively arranged on opposite sides of the house, and the passive evaporative cooling air towers are close to the house wall. The bottom of the solar chimney is reserved with an indoor air inlet leading into the room, the solar chimney is arranged on the upper part of the house wall, and the bottom of the solar chimney close to the house wall is reserved with an indoor air outlet.

The present invention is also characterized in that,

The passive evaporative cooling air tower includes an adiabatic tower body. The upper part of the tower body is evenly arranged with a plurality of outdoor air inlets around the outer side of the tower body. In the evaporative cooling section, the outdoor air inlet is set on the outside of the tower body corresponding to the coarse filter section, and the indoor air inlet is set at the bottom of the spray-type direct evaporative cooling section near the wall of the house. The top is also provided with a tower cover.

The coarse filter section is a coarse filter set in the outdoor air inlet.

The medium-efficiency filter section is a bag filter.

The spray-type direct evaporative cooling section includes an atomizer arranged under the medium-efficiency filter section and a water tank arranged at the bottom of the tower body, and the atomizer and the water tank are connected by a water supply pipe.

The water tank is also connected with an automatic water supply pipe.

The water supply pipe is also provided with a circulating water pump and a water processor.

The indoor air inlet is also provided with a variable frequency air volume regulating valve a.

The solar chimney includes a chimney body arranged above the house wall, the side of the chimney body far from the house wall is a glass curtain wall, the side of the chimney body on the house wall is a heat insulating wall body, and the indoor air outlet is arranged below the heat insulating wall body, A heat storage wall is also arranged on the side of the insulating wall away from the house wall, an outdoor air outlet is arranged above the glass curtain wall, and a glass cover plate is arranged on the top of the chimney.

A variable frequency air volume regulating valve b is arranged in the indoor air outlet.

The beneficial effects of the present invention are:

(1) The passive fresh air system of the present invention fully adopts renewable energy: dry air energy and solar energy, combines passive evaporative cooling down ventilation cooling technology and solar chimney technology, and relies on natural convection to make cool and fresh air into the room and pass through The air flow from the bottom to the top is discharged in the form of air organization, which not only enjoys healthy and comfortable fresh air, but also avoids the cost of high energy consumption;

(2) In the passive fresh air system of the present invention, a spray type direct evaporative cooling section is added inside the passive evaporative cooling air tower. When the temperature is high in summer, the fresh air sent into the room can be cooled and humidified, which increases the power of natural air flow. Or you can choose not to open this section in transitional seasons, the whole system is highly flexible, easy to implement and saves energy, and the spray also has a certain wet filtering effect on the fresh air;

(3) In the passive fresh air system of the present invention, a coarse-efficiency filter is added at the air inlet section around the upper part of the passive evaporative cooling air tower body, and then a bag filter is added inside the air tower, and a spray wet filter is added. effect, and the high-efficiency filter installed in the indoor air inlet, it forms a coarse-efficiency-medium-efficiency-wet-high-efficiency four-stage filtration. Compared with the traditional filtration method, the wet filtration link is added, which not only ensures the air quality of the indoor fresh air , and increase the service life of the high-efficiency filter.

Description of drawings

FIG. 1 is a schematic structural diagram of the passive fresh air system of the present invention.

In the figure, 1. Passive evaporative cooling air tower, 2. Tower cover, 3. Coarse-efficiency filter section, 4. Medium-efficiency filter section, 5. Spray-type direct evaporative cooling section, 6. Tower body, 7. Outdoor air inlet, 8. Coarse filter, 9. Bag filter, 10. Atomizer, 11. Circulating water pump, 12. Water processor, 13. Water tank, 14. Automatic water supply pipe, 15. Water supply pipe, 16. Solar chimney , 17. Glass cover, 18. Chimney, 19. Glass curtain wall, 20. Thermal storage wall, 21. Thermal insulation wall, 22. Outdoor air outlet, 23. Indoor, 24. Indoor air inlet, 25. Frequency conversion Air volume control valve a, 26. High efficiency filter, 27. Indoor air outlet, 28. Frequency conversion air volume control valve b.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The technical solution adopted in the present invention is, as shown in FIG. 1, a passive fresh air system with dry air energy and solar energy as driving energy, including passive evaporative cooling wind towers 1 and solar chimneys 16 respectively arranged on opposite sides of the house, The passive evaporative cooling air tower 1 is provided with an indoor air inlet 24 at the bottom near the house wall, and the solar chimney 16 is arranged on the upper part of the house wall, and the solar chimney 16 is close to the bottom of the house wall. An indoor air outlet 27 is reserved. .

The passive evaporative cooling air tower 1 includes an adiabatic tower body 6, the upper part of the tower body 6 is evenly provided with a plurality of outdoor air inlets 7 around the outer side of the tower body 6, and the tower body 6 is sequentially provided with coarse filter sections 3, The medium-efficiency filter section 4, the spray-type direct evaporative cooling section 5, the outdoor air inlet 7 is arranged on the outside of the tower body 6 corresponding to the coarse-efficiency filter section 3, and the indoor air inlet 24 is arranged in the spray-type direct evaporative cooling section 5 near the bottom of the house wall , the indoor air inlet 24 is also provided with a high-efficiency filter 26, and the top of the tower body 6 is also provided with a tower cover 2.

The coarse filter section 3 is a coarse filter 8 arranged in the outdoor air inlet 7 .

The medium-efficiency filter section 4 is a bag filter 9 .

The spray-type direct evaporative cooling section 5 includes an atomizer 10 arranged below the medium-efficiency filter section 4 and a water tank 13 arranged at the bottom of the tower body 6 . The atomizer 10 and the water tank 13 are connected by a water supply pipe 15 .

The water tank 13 is also connected with an automatic water supply pipe 14 .

The water supply pipe 15 is also provided with a circulating water pump 11 and a water processor 12 .

The indoor air inlet 24 is also provided with a variable frequency air volume regulating valve a25.

The solar chimney 16 includes a chimney body 18 arranged above the house wall, the side of the chimney body 18 away from the house wall is a glass curtain wall 19, the side of the chimney body 18 on the house wall is an insulating wall 21, and an indoor air outlet 27 is provided Below the thermal insulation wall 21, a heat storage wall 20 is arranged on the side of the thermal insulation wall 21 away from the house wall, an outdoor air outlet 22 is arranged above the glass curtain wall 19, and a glass cover is arranged on the top of the chimney 18 plate 17.

The indoor air outlet 27 is provided with a variable frequency air volume regulating valve b28.

The working process of the passive fresh air system of the present invention is:

(1) Operation in summer

The outdoor fresh air enters the tower body 6 from the outdoor air inlet 7 set on the upper part of the passive evaporative cooling air tower 1. Because the density of the cold air tends to sink, an anti-buoyancy ventilation effect is generated, and the fresh air entering the tower body 6 passes through the coarse filter 8 in turn. The bag filter 9 that realizes coarse-efficiency filtration, flows into the medium-efficiency filtration section 4 realizes medium-efficiency filtration, and flows into the spray-type direct evaporative cooling section 5 to realize cooling, humidification and wet filtration, and then from the indoor air inlet 24 through the high-efficiency filter 26 High-efficiency filtration Then, it is sent into the room 23 for ventilation and cooling, and the indoor air enters the solar chimney 16 through the indoor air outlet 27, and the sunlight shines on the glass curtain wall 19 and the glass cover plate 17, generating a large amount of heat and storing it in the thermal storage wall 20. The body 21 can prevent heat loss, and the air entering the solar chimney 16 continuously increases in temperature from bottom to top in the chimney body 18, and flows spontaneously along the chimney body 18 to the outdoor air outlet 22 to be discharged according to the chimney effect;

The working process of the spray-type direct evaporative cooling section 5 is as follows: the water in the water tank 13 is boosted by the circulating water pump 11 and flows through the water processor 12 for filtering through the water supply pipe 15, and then flows into the atomizer 10, and the atomizer 10 is atomized and sprayed. into the tower body 6 to achieve air cooling and humidification;

The variable frequency air volume regulating valve a25 provided in the indoor air inlet 24 and the variable frequency air volume regulating valve b28 provided in the indoor air outlet 27 are used to adjust the air volume entering the room and the air volume discharged from the room, respectively.

(2) Winter and transitional seasons

The spray-type direct evaporative cooling section 5 is not opened, and the outdoor fresh air enters the tower body 6 from the outdoor air inlet 7 set on the upper part of the passive evaporative cooling air tower 1. Due to the density of the cold air, it will sink, resulting in an anti-buoyancy ventilation effect and entering the tower body. The fresh air of 6 passes through the coarse filter 8 in turn to achieve coarse filtration, flows into the bag filter 9 of the medium-efficiency filter section 4 to achieve medium-efficiency filtration, and then from the indoor air inlet 24 is efficiently filtered by the high-efficiency filter 26 and then sent to the indoor 23. Ventilation, the indoor air enters the solar chimney 16 through the indoor air outlet 27, the sunlight shines on the glass curtain wall 19 and the glass cover plate 17, and generates a large amount of heat, which is stored in the thermal storage wall 20, and the thermal insulation wall 21 can prevent heat loss , the air entering the solar chimney 16 continuously increases in temperature from bottom to top in the chimney body 18, and flows spontaneously along the chimney body 18 to the outdoor air outlet 22 to be discharged according to the chimney effect;

The variable frequency air volume regulating valve a25 provided in the indoor air inlet 24 and the variable frequency air volume regulating valve b28 provided in the indoor air outlet 27 are used to adjust the air volume entering the room and the air volume discharged from the room, respectively.

Claims (6)

1. The passive fresh air system is characterized by comprising a passive evaporative cooling air tower (1) and a solar chimney (16) which are respectively arranged on two opposite sides of a house, wherein an indoor air inlet (24) communicated into a room is reserved at the bottom of the passive evaporative cooling air tower (1) close to the house wall, the solar chimney (16) is arranged at the upper part of the house wall, and an indoor air outlet (27) is reserved at the bottom of the solar chimney (16) close to the house wall;

the passive evaporative cooling air tower (1) comprises a heat-insulating tower body (6), a plurality of outdoor air inlets (7) are uniformly formed in the upper portion of the tower body (6) around the outer side of the tower body (6), a coarse-effect filtering section (3), a medium-effect filtering section (4) and a spray type direct evaporative cooling section (5) are sequentially arranged in the tower body (6) from top to bottom, the outdoor air inlets (7) are formed in the outer side of the tower body (6) corresponding to the coarse-effect filtering section (3), indoor air inlets (24) are formed in the bottom, close to a house wall, of the spray type direct evaporative cooling section (5), efficient filters (26) are further arranged in the indoor air inlets (24), and a tower cover (2) is further arranged at the top of the tower body (6);

the solar chimney (16) comprises a chimney body (18) arranged above a house wall, one side, far away from the house wall, of the chimney body (18) is a glass curtain wall (19), one side, on the house wall, of the chimney body (18) is a heat insulation wall body (21), the indoor air outlet (27) is arranged below the heat insulation wall body (21), one side, far away from the house wall, of the heat insulation wall body (21) is also provided with a heat storage wall body (20), an outdoor air outlet (22) is arranged above the glass curtain wall (19), and the top of the chimney body (18) is also provided with a glass cover plate (17);

the coarse filter section (3) is a coarse filter (8) arranged in an outdoor air inlet (7);

the middle-effect filtering section (4) is a bag filter (9).

2. The passive fresh air system according to claim 1, wherein the spray type direct evaporative cooling section (5) comprises an atomizer (10) arranged below the intermediate-effect filtering section (4) and a water tank (13) arranged at the bottom of the tower body (6), and the atomizer (10) and the water tank (13) are connected through a water supply pipe (15).

3. Passive fresh air system according to claim 2, characterized in that an automatic water replenishing pipe (14) is also connected to the water tank (13).

4. The passive fresh air system according to claim 2, wherein a circulating water pump (11) and a water treatment device (12) are further provided on the water supply pipe (15).

5. The passive fresh air system according to any one of claims 1 to 4, wherein a variable frequency air volume adjusting valve a (25) is further arranged in the indoor air inlet (24).

6. The passive fresh air system according to claim 1, wherein a variable frequency air volume adjusting valve b (28) is arranged in the indoor air outlet (27).

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