CN203116192U - Soil source auxiliary plate-fin indirect-direct two-stage evaporative cooling air conditioner unit - Google Patents

Abstract

The soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air-conditioning unit disclosed in the utility model includes an organic unit casing, and fresh air outlets and air supply outlets are respectively arranged on the opposite side walls of the unit casing. In the direction of entry, there are coarse-effect filters, plate-fin indirect evaporative coolers, direct evaporative coolers, water baffle b and air blowers in sequence. The tube heat exchanger and the buried tube heat exchanger are connected to the plate-fin indirect evaporative cooler in the unit casing through the water inlet pipe and the water outlet pipe. The soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the utility model combines the soil source heat exchanger technology with the evaporative cooling technology, realizes the integrated use of two renewable energy sources, and improves the cooling efficiency of the evaporative cooling system .

Description

Soil source assisted plate-fin indirect-direct two-stage evaporative cooling air conditioning unit

technical field

The utility model belongs to the technical field of air-conditioning and refrigeration equipment, in particular to a soil-source-assisted plate-fin indirect-direct two-stage evaporative cooling air conditioner composed of a buried tube heat exchanger, a plate-fin indirect evaporative cooler and a direct evaporative cooler unit.

Background technique

In some areas of our country, the temperature of the soil layer below 10 meters from the ground basically does not change with the external environment and seasonal changes. Therefore, applying soil sources as low-level renewable energy to existing air-conditioning systems can effectively reduce the high-grade energy. Dissipation speed. In summer, the buried tube heat exchanger is used to produce cold water as the spray water of the indirect evaporative cooler, and the water that falls in the water tank enters the buried tube heat exchanger to form a circulation pipeline, so that the temperature of the spray water Always maintain a low temperature, so that the soil can be effectively used.

Evaporative cooling technology is a highly efficient energy-saving and environmentally friendly technology that makes full use of renewable energy. It combines soil source heat exchanger technology with evaporative cooling technology, uses soil energy as an auxiliary energy source for evaporative cooling, and integrates two possible energy sources in nature. The application of renewable energy in air-conditioning equipment can further reduce the temperature of the air, improve the effective utilization of energy, and achieve the purpose of efficient refrigeration.

Contents of the invention

The purpose of this utility model is to provide a soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit, which combines the soil source heat exchanger technology with the evaporative cooling technology, realizes the integrated use of two renewable energy sources, and improves Cooling efficiency of evaporative cooling systems.

The technical solution adopted in the utility model is that the soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit includes an organic unit casing, and fresh air outlets and air supply outlets are respectively arranged on the opposite side walls of the unit casing. In the shell of the unit, there are coarse-effect filters, plate-fin indirect evaporative coolers, direct evaporative coolers, water baffle b and air blowers in sequence according to the direction of fresh air entering. The buried tube heat exchanger is located in the ground, and the buried tube heat exchanger is connected to the plate-fin indirect evaporative cooler through the outlet pipe and the water inlet pipe respectively.

The utility model is also characterized in that,

The plate-fin indirect evaporative cooler includes a plate-fin heat exchanger. The upper part of the plate-fin heat exchanger is provided with a spray branch a, a water baffle a, and an exhaust fan in sequence. The top wall of the unit shell corresponding to the exhaust fan is provided with The air outlet, the lower part of the plate-fin heat exchanger is provided with a water collection tank a, and a water processor a is installed in the water collection tank a, and the water processor a is connected to the water inlet of the buried tube heat exchanger through the water inlet pipe, The water outlet of the tube heat exchanger is connected with the spray branch pipe a through the water outlet pipe, and a cold water pump is arranged on the water outlet pipe.

The buried tube heat exchanger is a U-shaped tube buried heat exchanger.

The side wall of the unit shell corresponding to the plate-fin heat exchanger in the plate-fin indirect evaporative cooler is provided with a secondary air inlet.

The direct evaporative cooler includes packing, the upper part of the packing is provided with a spray branch pipe b, the lower part of the packing is provided with a water collecting tank b, and the water collecting tank b is provided with a water processor b, and the water processor b passes through the water supply pipe and the spray branch pipe b connection, the water supply pipe is provided with a water pump.

The beneficial effects of the utility model are:

1) The two-stage evaporative cooling air-conditioning unit of this utility model is applied to the soil source heat exchanger technology. The soil source heat exchanger is a kind of heat resource that utilizes the shallow underground layer to transfer low-temperature potential energy to high-temperature energy by inputting a small amount of high-potential energy. Potential energy transfer to realize a high-efficiency energy-saving system that can be heated and cooled. In this system, the soil source is used as a cold source, and the heat energy in tap water is released into the soil to reduce the water temperature. The water cycle can be controlled by a small power The circulating water pump realizes.

2) The spray water of the plate-fin indirect evaporative cooler in the two-stage evaporative cooling air-conditioning unit of the present utility model adopts the low-temperature water obtained from the buried pipe heat exchanger, and the water with a lower temperature forms a water film on the wall surface. It can enhance heat transfer and improve the efficiency of plate-fin indirect evaporative cooling.

Description of drawings

Fig. 1 is the structural diagram of the soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the present invention;

Fig. 2 is the structural diagram of the plate-fin type indirect cooler in the soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the present invention;

Fig. 3 is a structural diagram of the unit casing of the soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the present invention.

In the figure, 1. Fresh air outlet, 2. Coarse effect filter, 3. Spray branch pipe a, 4. Water baffle a, 5. Air exhaust port, 6. Exhaust fan, 7. Spray branch pipe b, 8. Block Water plate b, 9. air supply pipe, 10. blower fan, 11. water pump, 12. water processor b, 13. water collection tank b, 14. packing, 15. plate-fin heat exchanger, 16. water collection tank a, 17. Water processor a, 18. Cold water pump, 19. Buried pipe heat exchanger, 20. Secondary air inlet, 21. Water outlet pipe, 22. Water inlet pipe.

Detailed ways

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

The soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the present utility model has a structure as shown in Figure 1, including an organic unit casing, and fresh air outlets 1, The air supply port, according to the incoming direction of the fresh air, there are coarse filter 2, plate-fin indirect evaporative cooler, direct evaporative cooler, water baffle b8 and air blower 10 in the shell of the unit. The tube 9 is connected, and also includes a buried tube heat exchanger 19 arranged underground. The buried tube heat exchanger 19 is connected to the plate-fin indirect evaporative cooler in the unit casing through the outlet pipe and the water inlet pipe.

The plate-fin indirect evaporative cooler, as shown in Figure 1 and Figure 2, includes a plate-fin heat exchanger 15, and the upper part of the plate-fin heat exchanger 15 is sequentially provided with a spray branch a3, a water retaining plate a4, and an exhaust fan 6. The top wall of the unit casing corresponding to the exhaust fan 6 is provided with an air outlet 5, and the lower part of the plate-fin heat exchanger 15 is provided with a water collection tank a16, and a water processor a17 is installed in the water collection tank a16, and the water processor a17 passes through The water inlet pipe 22 is connected with the water inlet of the buried pipe heat exchanger 19, and the water outlet of the buried pipe heat exchanger 19 is connected with the spray branch pipe a3 through the water outlet pipe 21, and the cold water pump 18 is arranged on the water outlet pipe 21.

The buried tube heat exchanger 19 is a U-shaped tube buried heat exchanger.

As shown in FIG. 3 , a secondary air inlet 20 is provided on the side wall of the unit housing corresponding to the plate-fin heat exchanger 15 in the plate-fin indirect evaporative cooler.

The direct evaporative cooler includes packing 14, the upper part of the packing 14 is provided with a spray branch pipe b7, the lower part of the packing 14 is provided with a water collecting tank b13, and a water processor b12 is arranged in the water collecting tank b13, and the water processor b12 communicates with the The spray branch pipe b7 is connected, and a water pump 11 is arranged on the water supply pipe.

The soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air-conditioning unit of the utility model, during operation, the outdoor fresh air enters the unit shell through the fresh air port 1, and after filtering impurities such as dust through the coarse-effect filter 2, the air is used as The primary air flows through one side of the thin plate of the plate-fin heat exchanger 15 in the plate-fin indirect evaporative cooler, and transfers heat to the other side with a lower temperature through the thin plate, and the secondary air enters through the secondary air inlet 20 In the casing of the unit, the secondary air contacts the water film formed on the surface of the plate-fin heat exchanger 15 by the water sprayed by the spray branch a3, and the water with a lower temperature forms a water film on the wall of the plate-fin heat exchanger 15. Thus, the secondary air further cools the water film, and the water film cools down the primary air through the partition wall, thereby reducing the temperature; the secondary air passes through the water baffle a4, and is discharged to the Atmosphere; the primary air enters the direct evaporative cooler after being wet-cooled by the plate-fin indirect evaporator, and the circulating water is sent to the spray branch pipe b7 through the water pump 11, and the water is evenly sprayed on the packing 14, and then the water is sprayed by gravity Downstream wets the entire surface of the filler 14, the air passes through the water-sprayed filler 14, exchanges heat and moisture with the water film on the surface of the filler 14, and further cools the air, and the air is sent to the air-conditioned room by the blower 10 through the air supply pipe 9 through the water baffle b8;

For the spray water of the plate-fin indirect evaporative cooler: the non-evaporated water falls into the water collection tank a16, and the water enters the ground pipe heat exchanger 19 from the water collection tank a16, and the water with increased temperature is exchanged in the ground pipe heat exchanger. The heater 19 releases heat to the soil to reduce the water temperature, and the water is sent to the spray branch pipe a3 by the cold water pump 18. After the spray water passes through the plate-fin indirect evaporative cooler and air heat and moisture exchange, the unevaporated water enters In the water collection tank a16, a new circulation is formed;

The working process of the soil source auxiliary plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the present utility model:

1. When the system is running, the water system flow:

The spray water system of the plate-fin indirect evaporative cooler: when the system is running, the non-evaporated water falls into the water collection tank a16, and the water enters the buried pipe heat exchanger 19 from the water collection tank a16, and the water with increased temperature The heat is released to the soil in the buried pipe heat exchanger 19 to reduce the water temperature, and the water is sent to the spray branch pipe a3 by the cold water pump 18, and the spray water passes through the plate-fin indirect evaporative cooler and air heat and humidity exchange, The non-evaporated water enters the water collection tank a16 and repeats the cycle;

The spray water system of the direct evaporative cooler: when the system is running, the circulating water is sent to the spray branch pipe b7 by the water pump 11, and the water is evenly sprayed on the packing 14, and then the spray water relies on gravity to wet the entire surface of the packing 14, and After the air heat and humidity exchange is completed, the unevaporated water enters the water collection tank b13 and repeats the cycle;

2. When the system is running, the wind system flow:

When the system is running, the outdoor fresh air enters the unit shell through the fresh air outlet 1, and after filtering impurities such as dust through the coarse-effect filter 2, the air enters the plate-fin indirect evaporative cooler as primary air and passes through the plate-fin heat exchanger 15 One side of the thin plate flows through the thin plate and transfers heat to the other side with lower temperature through the thin plate. The primary air enters the direct evaporative cooler after being wet-cooled by the plate-fin indirect evaporator, and is cooled by the direct evaporative cooler. The water baffle b8 is sent to the air-conditioned room by the blower 10 through the air supply pipe 9; the secondary air enters the unit casing through the secondary air inlet 20, and the water is cooled to the wet bulb temperature close to the secondary air, and the hot and humid air passes through the baffle The water plate a4, under the pressure of the exhaust fan 6, is discharged to the atmosphere through the air outlet 5, and the heat is discharged from the unit.

The soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit of the utility model combines the soil source (buried pipe) heat exchanger technology with the evaporative cooling technology: one is to use the soil energy to exchange heat with the buried pipe The heat exchanger releases heat into the soil to obtain cold water with a lower temperature; the second is to use the cold water produced by the buried pipe heat exchanger as the spray water in the indirect evaporative cooling section, and the lower temperature water forms a water film on the wall surface, which can Enhance heat transfer and improve indirect evaporative cooling efficiency.

Utilizing the buried tube heat exchanger 19, the buried heat exchanger loop is a closed loop of water mechanically circulating underground, and releases heat to the soil in summer to reduce the temperature of the water in the loop; the U-shaped tube underground heat exchanger The cold water is prepared as the spray water of the plate-fin indirect evaporative cooler, and the water with a lower temperature forms a water film on the wall surface, which can enhance heat transfer and improve the efficiency of indirect evaporative cooling.

Claims (5)

1. Soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit, characterized in that it includes an organic unit casing, and the opposite side walls of the unit casing are respectively provided with fresh air outlets (1) and air supply outlets , the casing of the unit is provided with a coarse-effect filter (2), a plate-fin indirect evaporative cooler, a direct evaporative cooler, a water baffle b (8) and a blower (10) in sequence according to the direction in which the fresh air enters, and the blower (10) is connected with the air supply port through the air supply pipe (9), and also includes a buried pipe heat exchanger (19) arranged underground, and the buried pipe heat exchanger (19) passes through the outlet pipe ( 21) and the water inlet pipe (22) are respectively connected with the plate-fin indirect evaporative cooler. 2. The soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit according to claim 1, characterized in that the plate-fin type indirect evaporative cooler includes a plate-fin type heat exchanger (15), The upper part of the plate-fin heat exchanger (15) is sequentially provided with a spray branch pipe a (3), a water baffle a (4), and an exhaust fan (6). The wall is provided with an air outlet (5), and the lower part of the plate-fin heat exchanger (15) is provided with a water collecting tank a (16), and the water collecting tank a (16) is provided with a water processor a (17) , the water processor a (17) is connected to the water inlet of the buried pipe heat exchanger (19) through the water inlet pipe (22), and the water outlet of the buried pipe heat exchanger (19) passes through The water outlet pipe (21) is connected to the spray branch pipe a (3), and a cold water pump (18) is arranged on the water outlet pipe (21). 3. The soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit according to claim 1 or 2, characterized in that the buried tube heat exchanger (19) is a U-shaped tube buried heat exchanger device. 4. The soil source-assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit according to claim 1 or 2, characterized in that the plate-fin heat exchanger (15 ) is provided with a secondary air inlet (20) on the side wall of the unit casing corresponding to . 5. The soil source assisted plate-fin type indirect-direct two-stage evaporative cooling air conditioning unit according to claim 1, characterized in that the direct evaporative cooler includes filler (14), and the filler (14) The upper part is provided with a spray branch pipe b (7), the lower part of the filler (14) is provided with a water collecting tank b (13), and the water collecting tank b (13) is provided with a water processor b (12), and the water The processor b (12) is connected to the spray branch b (7) through a water supply pipe, and a water pump (11) is arranged on the water supply pipe.

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