CN104791933A - Anti-icing type evaporative cooling air conditioning system based on photovoltaic driving - Google Patents

Abstract

The anti-icing evaporative cooling air-conditioning system based on photovoltaic drive disclosed by the present invention includes an evaporative cooling air-conditioning unit, which is connected to the return air outlet and the static pressure box provided in the room through the air pipe network; the evaporative cooling air-conditioning unit Also connected to the photovoltaic drive. The invention is based on a photovoltaic-driven anti-icing evaporative cooling air-conditioning system, which uses photovoltaic-driven power generation to drive the operation of the evaporative cooling air-conditioning unit, effectively saving electric energy; using the return air to preheat the cold water in the coil to prevent water splashing caused by over-cold weather Icing on the fill ensures humidification of dry air in winter and ensures year-round operation of evaporative cooling air conditioning units.

Description

Anti-icing evaporative cooling air conditioning system based on photovoltaic drive

technical field

The invention belongs to the technical field of air-conditioning and refrigeration equipment, and in particular relates to an anti-icing evaporative cooling air-conditioning system based on photovoltaic drive.

Background technique

In some large-scale indoor activity places, the commonly used refrigeration equipment is mechanical refrigeration equipment. However, in practical applications, although mechanical refrigeration equipment can effectively adjust the indoor temperature, it has the disadvantage of high energy consumption during operation. In order to respond The energy-saving policy vigorously promoted by the country usually adopts the natural ventilation cooling method to adjust the indoor temperature during the transitional season. Although this can save energy to a certain extent, it basically does not have the ability to adjust the indoor air temperature and humidity. function, unable to meet the temperature accuracy range required indoors.

Compared with mechanical refrigeration equipment, evaporative air conditioners have lower energy consumption; and the cooling medium used in evaporative air conditioners is water, which will not pollute the atmosphere. Based on the advantages of evaporative air conditioners, evaporative air conditioners have developed rapidly in recent years. However, in winter, especially in some very cold areas, the water in the circulating water tank of the evaporative air conditioner will freeze, which will affect the humidification effect of the air and bring inconvenience to the use in winter.

Contents of the invention

The purpose of the present invention is to provide an anti-icing evaporative cooling air-conditioning system based on photovoltaic drive, which uses photovoltaic drive to generate electricity to drive the operation of evaporative cooling air-conditioning units, saving electric energy; using the return air to preheat the cold water in the heat exchange coil to prevent Overcooling causes the water to freeze on the packing, ensuring the humidification of the dry air in winter and ensuring the year-round operation of the evaporative cooling air-conditioning unit.

The technical solution adopted in the present invention is that the anti-icing evaporative cooling air-conditioning system driven by photovoltaics includes an evaporative cooling air-conditioning unit, and the evaporative cooling air-conditioning unit is connected to the return air outlet and the static pressure box set in the room through the air pipe network ; The evaporative cooling air conditioning unit is also connected to a photovoltaic drive.

The present invention is also characterized in that:

An exhaust air supply fan is arranged in the return air outlet, and the exhaust air supply fan is connected with the photovoltaic driving device.

The photovoltaic drive device includes solar panels, the solar panels are connected to the controller and the inverter through wires in turn; the controller is connected to the battery pack through wires; the inverter is connected to the exhaust fan and the evaporative cooling air conditioning unit through wires respectively .

The evaporative cooling air-conditioning unit includes an organic unit shell, the top wall of the unit shell is provided with a return air inlet, the bottom of the unit shell is provided with an air supply port, and each side wall of the unit shell is provided with a fresh air inlet; In the casing of the unit, there is a plant fiber filler near the fresh air inlet on each side wall, a water distributor is arranged above each plant fiber filler, and a circulating water tank is arranged below multiple plant fiber fillers. A plant fiber filler surrounds an air duct; the upper part of the air duct is provided with a heat exchange coil near the return air inlet, and the lower part of the air duct is provided with a fiber filter near the air supply outlet; the water inlet of the heat exchange coil passes through the water supply The pipe is connected with the circulating water tank, and the water outlet ends of the heat exchange coil are respectively connected with multiple water distributors.

The water distributor is composed of a water distribution pipe and a plurality of nozzles evenly arranged on the water distribution pipe and spraying downwards; the water supply pipe is provided with a circulating water pump, and the circulating water pump is connected to the inverter through a wire.

The return air inlet is connected to the exhaust pipe through the return air pipe, one end of the exhaust pipe is connected to the return air outlet set in the room, and the other end of the exhaust pipe is connected to the outside; the air supply port is connected to the static pressure box through the air supply pipe.

A blower connected to the inverter is arranged in the air supply port; a butterfly valve is arranged on the air return pipe.

The blower is an axial flow fan.

The wall of the static pressure box is provided with a plurality of injection ports.

The injection port is a spherical nozzle.

The beneficial effects of the present invention are:

1) The anti-icing evaporative cooling air-conditioning system of the present invention is respectively provided with a photovoltaic driving device and an evaporative cooling air-conditioning unit, wherein the photovoltaic driving device can make full use of the renewable energy in nature - solar energy, and use solar power as a driving force to supply evaporative cooling The air-conditioning unit reduces the waste of resources and environmental pollution caused by thermal power generation.

2) In the anti-icing type evaporative cooling air-conditioning system of the present invention, the evaporative cooling air-conditioning unit makes full use of the fresh air and the return air, and by mixing the fresh air and the return air, the energy in the return air is fully utilized, reducing the waste of energy and realizing Cascade utilization of energy.

3) When the anti-icing evaporative cooling air-conditioning system of the present invention is in operation in winter, the cold water in the coil is preheated by the return air to prevent the water from freezing on the packing due to the over-cold weather, so as to ensure the humidification of the dry air in winter, Make the air temperature and humidity reach the standard, so as to ensure the operation of the evaporative cooling air conditioning unit throughout the year.

4) In the anti-icing evaporative cooling air-conditioning system of the present invention, the evaporative cooling air-conditioning unit is provided with a fiber filter screen inside, which can further filter the air after the filler cooling treatment, increasing the cleanliness of the air supply.

5) The anti-icing evaporative cooling air-conditioning system of the present invention is provided with a static pressure box, and the spherical nozzle is used to supply air to the room, which ensures the air supply range, saves the application of indoor air supply pipes, and saves pipe investment.

Description of drawings

Fig. 1 is the structural representation of anti-icing type evaporative cooling air-conditioning system of the present invention;

Fig. 2 is a structural schematic diagram of the photovoltaic drive device in the anti-icing evaporative cooling air-conditioning system of the present invention.

In the figure, 1. Solar panel, 2. Controller, 3. Battery pack, 4. Inverter, 5. Fresh air inlet, 6. Return air inlet, 7. Water distributor, 8. Plant fiber filler, 9. Fiber filter, 10. Air blower, 11. Injection port, 12. Static pressure tank, 13. Circulating water tank, 14. Circulating water pump, 15. Heat exchange coil, 16. Exhaust air blower, 17. Butterfly valve, 18. Room, 19. Air supply pipe, 20. Return air pipe, 21. Exhaust air pipe, 22. Air supply outlet, 23. Evaporative cooling air conditioning unit, 24. Water supply pipe.

Detailed ways

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

The present invention is based on a photovoltaic-driven anti-icing evaporative cooling air-conditioning system. Its structure is shown in FIG. 1 , including an evaporative cooling air-conditioning unit 23. The static pressure box 12 is connected; the evaporative cooling air conditioner unit 23 is also connected with the photovoltaic drive device.

An exhaust air blower 16 is arranged in the return air outlet, and the exhaust air blower 16 is connected with the photovoltaic driving device.

The photovoltaic driving device, as shown in Figure 2, includes a solar cell panel 1, the solar cell panel 1 is connected to the controller 2 and the inverter 4 in turn through wires; the controller 2 is connected to the battery pack 3 through wires; the inverter 4 Connect with the exhaust air blower 16 and the evaporative cooling air conditioner unit 23 respectively by wires.

The structure of the evaporative cooling air-conditioning unit is shown in Figure 1, including an organic unit casing, a return air inlet 6 is arranged on the top wall of the unit casing, an air supply port 22 is arranged at the bottom of the unit casing, and each side of the unit casing A fresh air inlet 5 is arranged on the wall; in the unit casing, a plant fiber filler 8 is arranged near the fresh air inlet 5 on each side wall, and a water distributor 7 is arranged above each plant fiber filler 8 A circulating water tank 13 is arranged below a plurality of plant fiber fillers 8, and a plurality of plant fiber fillers 8 enclose an air duct; the upper part of the air duct is provided with a heat exchange coil 15 near the return air inlet 6, and the lower part of the air duct A fiber filter 9 is arranged near the air outlet 22 ; the water inlet end of the heat exchange coil 15 is connected to the circulating water tank 13 through the water supply pipe 24 , and the water outlet end of the heat exchange coil 15 is respectively connected to a plurality of water distributors 7 .

The water distributor 7 is composed of a water distribution pipe and a plurality of nozzles evenly arranged on the water distribution pipe and spraying downwards; the water supply pipe 24 is provided with a circulating water pump 14 connected to the inverter 4 .

The return air inlet 6 is connected with the exhaust duct 21 through the return duct 20, one end of the exhaust duct 21 is connected with the return air outlet provided in the room 18, and the other end of the exhaust duct 21 communicates with the outside; The pipe 19 is connected to a plenum 12 provided on the wall of the room 18 .

A blower 10 connected to the inverter 4 is arranged in the air outlet 22; the blower 10 is an axial flow blower.

The return air duct 20 is provided with a butterfly valve 17 .

The static pressure box 12 is provided with a plurality of injection ports 11; the injection ports 11 are spherical nozzles.

The working process of the photovoltaic drive device in the anti-icing evaporative cooling air-conditioning system based on photovoltaic drive of the present invention is as follows:

When the sun shines on the solar panel 1, the solar panel 1 absorbs energy and converts it into DC current. The DC current enters the controller 2 along the wire, and is sent to the inverter 4 through the controller 2. In the device 4, it is converted into alternating current, and then supplied to the exhaust air blower 16 and the power consumption equipment blower 10 and the circulating water pump 14 in the evaporative cooling air-conditioning unit for use.

When the photovoltaic drive device generates enough power, the excess electricity is stored in the storage battery pack 3 in the form of direct current through the controller 2 for standby; After the converter 4 is converted into alternating current, it is supplied to the exhaust air blower 16 and the power consumption equipment blower 10 and circulating water pump 14 in the evaporative cooling air-conditioning unit.

In the photovoltaic-driven anti-icing evaporative cooling air-conditioning system of the present invention, the working process of the evaporative cooling air-conditioning unit is as follows:

1) The working process of the wind system:

When running in summer, close the butterfly valve 17;

The outdoor fresh air enters the unit casing through multiple fresh air inlets 5, passes through the plant fiber filler 8 wetted by the water distributor 7, performs temperature and humidity treatment at the plant fiber filler 8, and then gathers in the air duct, where it is filtered by fibers After the net 9 is filtered, it is sent into the static pressure box 12 along the air supply pipe 19 under the action of the blower 10, and finally sent to the room through the injection port 11 provided on the surface of the static pressure box 12; Under the effect of the exhaust air blower 16, it is all discharged to the outside along the exhaust pipe 21.

When running in winter, fully open the butterfly valve 17;

The outdoor fresh air enters the casing of the unit through a plurality of fresh air inlets 5, and after passing through the plant fiber filler 8 wetted by the water distributor 7, it is mixed with the indoor return air entering the casing of the unit through the return air inlet 6. After being filtered through the fiber filter 9, it is sent into the static pressure box 12 along the air supply pipe 19 under the action of the blower 10, and finally the treated air is sent to the room through the injection port 11 set on the static pressure box 12. and the indoor air after the heat and humidity exchange is discharged to the outside along the exhaust pipe 21 under the effect of the exhaust air blower 16, and a part flows into the unit housing through the return air pipe 20 as return air and continues to use.

2) The working process of the water system:

In summer:

The circulating water in the circulating water tank 13 is sent to multiple water distributors 7 along the heat exchange coil 15 under the action of the circulating water pump 14. After spraying through the nozzles, the spraying water is evenly distributed along the plant fiber fillers 8. A water film is formed on the surface of the plant fiber filler 8, wherein a part of the water is taken away with the air, and a part of the water flows downward along the plant fiber filler 8, and flows into the circulating water tank 13 for reciprocating use.

in the winter:

The circulating water in the circulating water tank 13 is sent into the heat exchange coil 15 under the action of the circulating water pump 14, and the water in the heat exchange coil 15 absorbs the heat in the return air, so that the temperature of the water in the heat exchange coil 15 rises At this time, the water with increased temperature is sent to each water distributor 7 respectively, and sprayed through the nozzles, so that a uniform water film is formed on the surface of each plant fiber filler 8, and part of the water is taken away with the air, and some of the water is taken along with the air. The plant fiber filler 8 flows downwards and flows into the circulating water tank 13 for reciprocating use.

The invention is based on a photovoltaic-driven anti-icing evaporative cooling air-conditioning system, which uses photovoltaic-driven power generation to drive the operation of the evaporative cooling air-conditioning unit, effectively saving electric energy; using the return air to preheat the cold water in the coil to prevent water splashing due to excessively cold weather Icing on the fill ensures humidification of dry air in winter and ensures year-round operation of evaporative cooling air conditioning units.

Claims (10)

1. The anti-icing evaporative cooling air-conditioning system based on photovoltaic drive is characterized in that it includes an evaporative cooling air-conditioning unit (23), and the evaporative cooling air-conditioning unit (23) communicates with the room (18) through the air pipe network. The return air outlet is connected to the static pressure box (12); the evaporative cooling air conditioner unit (23) is also connected to the photovoltaic drive device. 2. The anti-icing evaporative cooling air-conditioning system according to claim 1, characterized in that, an exhaust blower (16) is arranged in the return air outlet, and the exhaust blower (16) is connected to a photovoltaic drive device . 3. The anti-icing evaporative cooling air-conditioning system according to claim 1 or 2, characterized in that the photovoltaic drive device includes a solar panel (1), and the solar panel (1) is sequentially passed through a wire Connect with controller (2) and inverter (4); The controller (2) is connected to the battery pack (3) through wires; The inverter (4) is respectively connected with the exhaust air blower (16) and the evaporative cooling air conditioner unit (23) through wires. 4. The anti-icing evaporative cooling air-conditioning system according to claim 3, wherein the evaporative cooling air-conditioning unit includes an organic unit casing, and a return air inlet (6 ), the bottom of the unit housing is provided with an air outlet (22), and each side wall of the unit housing is provided with a fresh air inlet (5); In the unit casing, a plant fiber filler (8) is arranged near the fresh air inlet (5) on each side wall, and a water distributor (7) is arranged above each plant fiber filler (8). A circulating water tank (13) is arranged below the plant fiber fillers (8), and a plurality of plant fiber fillers (8) form an air duct; A heat exchange coil (15) is arranged in the upper part of the air duct near the return air inlet (6), and a fiber filter screen (9) is arranged in the lower part of the air duct near the air supply port (22); The water inlet end of the heat exchange coil (15) is connected to the circulating water tank (13) through the water supply pipe (24), and the water outlet end of the heat exchange coil (15) is respectively connected to a plurality of water distributors (7). 5. The anti-icing evaporative cooling air-conditioning system according to claim 4, characterized in that, the water distributor (7) is composed of a water distribution pipe and a plurality of nozzles evenly arranged on the water distribution pipe and spraying downwards; A circulating water pump (14) is arranged on the water supply pipe (24), and the circulating water pump (14) is connected to the inverter (4) through a wire. 6. The anti-icing evaporative cooling air-conditioning system according to claim 4, characterized in that, the return air inlet (6) is connected to the exhaust duct (21) through the return duct (20), and the exhaust duct One end of the pipe (21) is connected to the return air outlet provided in the room (18), and the other end of the exhaust pipe (21) is connected to the outside; The air supply port (22) is connected with the static pressure box (12) through the air supply pipe (19). 7. The anti-icing evaporative cooling air-conditioning system according to claim 6, characterized in that a blower (10) connected to the inverter (4) is arranged in the air supply port (22); The return air pipe (20) is provided with a butterfly valve (17). 8. The anti-icing evaporative cooling air-conditioning system according to claim 7, characterized in that the blower (10) is an axial flow fan. 9. The anti-icing evaporative cooling air-conditioning system according to claim 6, characterized in that a plurality of injection ports (11) are arranged on the wall of the static pressure tank (12). 10. The anti-icing evaporative cooling air-conditioning system according to claim 9, characterized in that, the injection port (11) is a spherical nozzle.