CN209763377U - Air conditioning unit based on plate-fin-dew point two-stage indirect evaporative cooling - Google Patents

Abstract

The utility model discloses an air conditioning unit based on indirect evaporative cooling of board wing-dew point two-stage, including direct evaporative cooling unit and be the board wing-dew point two-stage indirect evaporative cooling unit that the symmetry set up in the direct evaporative cooling unit left and right sides, direct evaporative cooling unit's the left and right sides is the symmetry and is provided with two first air intakes, and one side that two board wing-dew point two-stage indirect evaporative cooling units are close to direct evaporative cooling unit all is provided with first air outlet, and two first air intakes communicate with the first air outlet of the board wing-dew point two-stage indirect evaporative cooling unit of its one side that corresponds respectively. The utility model discloses an integration unit compares with comparing current mechanical refrigeration cooling water set, has reduced the power consumption of equipment and has reduced the volume of unit.

Description

Air conditioning unit based on plate-fin-dew point two-stage indirect evaporative cooling

technical field

The utility model belongs to the technical field of air-conditioning equipment, in particular to an air-conditioning unit based on plate-fin-dew-point two-stage indirect evaporative cooling.

Background technique

With the development of economic construction, a large number of various industrial buildings are built, but the air-conditioning equipment and systems used in domestic buildings currently have the problem of high energy consumption. In recent years, some industrial buildings have higher and higher requirements for indoor temperature and humidity, such as textile factories, production workshops, data centers, etc. When cooling in these areas, traditional mechanical refrigeration chillers are used for separate cooling, which consumes a lot of power and requires high operation and maintenance costs. Moreover, the temperature of cold water produced is often lower than the dew point temperature of the indoor air, and the cold water is passed into the end of the room to eliminate waste heat. When the temperature is high, water droplets are easy to precipitate on the surface of the equipment, resulting in condensation, which will affect the normal operation of the equipment in severe cases. Under the call of the national energy conservation and emission reduction policy, we need a new type of air conditioner with low energy consumption, small size, safety and reliability to meet people's more requirements for working and living environments. Evaporative cooling air-conditioning technology makes full use of dry air energy to produce cold water to cool down the indoor temperature of industrial buildings that need to be cooled throughout the year. Evaporative cooling air-conditioning technology uses water as the cooling medium to cool and dissipate heat through water evaporation. ", through the direct or indirect contact of air and water to produce cold air or cold water. At present, this technology has been widely used in the northwest and southeast coastal areas of my country, as well as countries along the “Belt and Road”. But in fact, the refrigeration performance of the evaporative cooling chiller is greatly affected by the efficiency of the indirect evaporative cooling section. Generated cold wind.

Utility model content

The purpose of this utility model is to provide an air conditioning unit based on plate-fin-dew point two-stage indirect evaporative cooling, which reduces the power consumption of the equipment and the volume of the unit compared with the existing mechanical refrigeration chiller.

The technical scheme adopted by the utility model is that the air conditioning unit based on plate-fin-dew point two-stage indirect evaporative cooling includes a direct evaporative cooling unit and plate-fin-dew point two-stage indirect cooling units symmetrically arranged on the left and right sides of the direct evaporative cooling unit. The evaporative cooling unit, the left and right sides of the direct evaporative cooling unit are symmetrically provided with two first air inlets, and the two plate-fin-dew point two-stage indirect evaporative cooling units are provided with first air outlets on the side close to the direct evaporative cooling unit , the two first air inlets communicate with the first air outlets of the plate-fin-dew point two-stage indirect evaporative cooling unit on the corresponding side respectively.

The direct evaporative cooling unit includes a shell a, in which a water baffle, a first water distributor, a first packing and a first water tank are sequentially arranged from top to bottom, and the first water distributor passes through the water pipe G1 and the first The water tank is connected, a second air outlet is provided on the top of the corresponding housing a above the water baffle, and two first air inlets are symmetrically arranged on the left and right sides of the corresponding housing a below the first packing.

A fan is arranged in the second air outlet.

The utility model is also characterized in that,

The water pipe G1 is provided with a first water pump.

The plate fin-dew point two-stage indirect evaporative cooling unit includes a shell b, the side of the shell b close to the direct evaporative cooling unit is provided with a first air outlet, and the side of the shell b away from the direct evaporative cooling unit is provided with a second air inlet The tuyere, the housing b is provided with a coarse-effect filter, a plate-fin indirect evaporative cooling unit and a dew point indirect evaporative cooling unit in sequence according to the air flow direction, and the top of the corresponding housing b above the plate-fin indirect evaporative cooling unit is provided with a second Three air outlets, the top of the corresponding housing b above the dew point indirect evaporative cooling unit is provided with a fourth air outlet;

There is also a second water tank at the inner bottom of the shell b. The second water tank is located below the plate-fin indirect evaporative cooling unit and the dew point indirect evaporative cooling unit. The second water tank is connected to the plate-fin indirect evaporative cooling unit through water pipes G2 and G3 respectively. and dew point indirect evaporative cooling unit connection.

The plate-fin indirect evaporative cooling unit includes a second water distributor and a plate-fin indirect evaporative cooler from top to bottom; a secondary fan a is installed in the third air outlet, and the second water tank is located in the plate-fin indirect evaporative cooler. Below the cooler, the second water distributor is connected to the second water tank through the water pipe G2, and the water pipe G2 is provided with a second water pump.

The dew-point indirect evaporative cooling unit includes a third water distributor and a dew-point indirect evaporative cooler arranged in sequence from top to bottom; a secondary fan b is installed in the fourth air outlet, and the second water tank is located below the dew-point indirect evaporative cooler , the third water distributor is connected to the second water tank through the water pipe G3, and the third water pump is arranged on the water pipe G3.

The fourth air outlet is also connected with a secondary exhaust air duct.

The bottom of the first filler is in a "V" shape.

The beneficial effects of the utility model are:

(1) Compared with the existing evaporative cooling chiller, the integrated unit of the present utility model combines the plate-fin indirect evaporative cooler and the dew point indirect evaporative cooler into the evaporative cooling chiller, and the plate-fin indirect evaporative The plate-fin-dew point two-stage indirect evaporative cooling unit composed of cooler and dew point indirect evaporative cooler reduces the volume of the unit and makes the structure more compact;

(2) In the integrated unit of the present utility model, after the plate-fin indirect evaporative cooling unit pre-cools the primary air, the dew point indirect evaporative cooling section cools the primary air again, which strengthens the cooling efficiency of the dew point indirect evaporative cooling unit, and once The temperature drop of the air through the two-stage indirect evaporative cooling section and other wet cooling treatment is greater, and the wet bulb temperature of the primary air entering the direct evaporative cooling unit is lower, which can produce cold water with a lower temperature;

(3) Compared with other types of indirect evaporative coolers, the dew-point indirect evaporative cooler adopted by the integrated unit of the present utility model has a lower temperature of the secondary exhaust air, and it is possible to install an air duct for the secondary exhaust air. cold recovery;

(4) Compared with the plate-fin indirect evaporative cooler, the dew-point indirect evaporative cooler adopted by the integrated unit of the present utility model has a lower temperature of the cooled circulating water after spraying, and the cooled circulating water can be used as Use of spray water for plate-fin indirect evaporative cooling units and dew point indirect evaporative cooling units.

Description of drawings

Fig. 1 is a structural schematic diagram of the air conditioning unit based on the plate-fin-dew point two-stage indirect evaporative cooling of the utility model.

In the figure, 1. Second air inlet, 2. Coarse effect filter, 3. Plate-fin-dew point two-stage indirect evaporative cooling unit, 4. Plate-fin indirect evaporative cooler, 5. Second water tank, 6. Second Water distributor, 7. Secondary fan a, 8. Dew point indirect evaporative cooling unit, 9. Second water pump, 10. Dew point indirect evaporative cooler, 11. Third water pump, 12. Third water distributor, 13 .Secondary fan b, 14. Secondary exhaust air duct, 15. Direct evaporative cooling unit, 16. First packing, 17. First water pump, 18. First water distributor, 19. Water retaining plate, 20. Fan, 21. the first air inlet, 22. the first water tank, 23. the second air outlet, 24. the third air outlet, 25. the fourth air outlet.

Detailed ways

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

The utility model is based on the plate-fin-dew point two-stage indirect evaporative cooling air conditioning unit, as shown in Figure 1, including a direct evaporative cooling unit 15 and plate-fin-dew point two-stage symmetrically arranged on the left and right sides of the direct evaporative cooling unit 15 The indirect evaporative cooling unit 3, the left and right sides of the direct evaporative cooling unit 15 are symmetrically provided with two first air inlets 21, and the two plate-fin-dew point two-stage indirect evaporative cooling unit 3 are located on the side close to the direct evaporative cooling unit 15. A first air outlet is provided, and the two first air inlets 21 communicate with the first air outlets of the plate fin-dew point two-stage indirect evaporative cooling unit 3 on the corresponding side respectively.

The direct evaporative cooling unit 15 includes a shell a, and the shell a is sequentially provided with a water baffle 19, a first water distributor 18, a first filler 16, a first water tank 22, and a first water distributor 18. Connected to the first water tank 22 through the water pipe G1, the top of the corresponding casing a above the water baffle 19 is provided with a second air outlet 23, and the two first air inlets 21 are located on the left and right sides of the corresponding casing a below the first packing 16 Set symmetrically.

A fan 20 is disposed in the second air outlet 23 .

A first water pump 17 is provided on the water pipe G1.

The plate fin-dew point two-stage indirect evaporative cooling unit 3 includes a shell b, the side of the shell b close to the direct evaporative cooling unit 15 is provided with a first air outlet, and the side of the shell b away from the direct evaporative cooling unit 15 is provided with a The second air inlet 1, the shell b is provided with a coarse-effect filter 2, a plate-fin indirect evaporative cooling unit and a dew point indirect evaporative cooling unit 8 in sequence according to the air flow direction, and the corresponding shell above the plate-fin indirect evaporative cooling unit A third air outlet 24 is provided on the top of the body b, and a fourth air outlet 25 is provided on the top of the corresponding shell b above the dew point type indirect evaporative cooling unit 8;

The inner bottom of the housing b is also provided with a second water tank 5, the second water tank 5 is located below the plate-fin indirect evaporative cooling unit and the dew point indirect evaporative cooling unit 8, and the second water tank 5 is connected to the plate-fin The indirect evaporative cooling unit and the dew point indirect evaporative cooling unit 8 are connected.

The plate-fin indirect evaporative cooling unit includes a second water distributor 6 and a plate-fin indirect evaporative cooler 4 arranged sequentially from top to bottom; a secondary fan a7 is installed in the third air outlet 24, and the second water tank 5 is located on the plate Below the fin-type indirect evaporative cooler 4, the second water distributor 6 is connected to the second water tank 5 through the water pipe G2, and the second water pump 9 is arranged on the water pipe G2.

The dew-point indirect evaporative cooling unit 8 includes a third water distributor 12 and a dew-point indirect evaporative cooler 10 arranged sequentially from top to bottom; a secondary fan b13 is installed in the fourth air outlet 25, and the second water tank 5 is located in the dew-point Below the indirect evaporative cooler 10, the third water distributor 12 is connected to the second water tank 5 through the water pipe G3, and the third water pump 11 is arranged on the water pipe G3.

The fourth air outlet 25 is also connected to the secondary exhaust air duct 14 .

The bottom of the first filler 16 is in a "V" shape.

The working process and working principle of the utility model integrated unit are as follows:

(1) Primary air flow:

After the primary air passes through the plate-fin indirect evaporative cooling unit and the dew point indirect evaporative cooling unit 8 in turn and is wet-cooled, it exchanges heat and mass with the circulating spray water on the first packing 16 in the direct evaporative cooling unit 15, and passes through the fan 20 is exhausted to the atmosphere; when a part of the primary air passes through the dew point indirect evaporative cooling unit 8, part of the cooled primary air enters the secondary air side through small holes, and exchanges heat and moisture with the water film as the secondary air Finally, the cold energy is recovered through the secondary fan 13 and the secondary exhaust air duct 14.

(2) Secondary air flow:

The secondary air of the plate-fin indirect evaporative cooling unit comes from the outside, and after the heat and moisture exchange between the secondary air and the water film, it is discharged to the environment through the secondary fan a7; the secondary air of the dew point indirect evaporative cooling unit 8 comes from the quilt plate The primary air pre-cooled by the fin-type indirect evaporative cooling unit, in the dew-point indirect evaporative cooler 10, part of the cooled primary air continuously enters the secondary air side through the small hole, as the secondary air and the water film. After the heat and moisture exchange, the cold energy is recovered through the secondary blower b13 and the secondary exhaust air pipe 14 .

(3) The working process of circulating water in the plate-fin-dew point two-stage indirect evaporative cooling unit:

Compared with the plate-fin indirect evaporative cooler 4, the dew point indirect evaporative cooler 10 has a lower temperature of the circulating water cooled by spraying, and the cooled circulating water is used as a plate-fin indirect evaporative cooling unit and a dew point indirect evaporative cooling unit. The spray water of the unit 8 is used, and the circulating water of the second water tank 5 in the plate-fin type indirect evaporative cooling unit is emptied in time.

(4) The working principle of the dew point indirect evaporative cooler is:

Part of the cooled primary air continuously enters the secondary air side through small holes, where heat and moisture exchange occurs between the secondary air and the water film, so that the outlet temperature of the primary air is close to its corresponding dew point temperature, which greatly improves the cooling efficiency ; Compared with other types of indirect evaporative coolers, the dew point indirect evaporative cooler has a lower temperature of the secondary exhaust air, so it can recover the cooling capacity of the secondary exhaust air; Type indirect evaporative cooler, the temperature of the cooled circulating water after spraying is also low, and the cooled circulating water is used as the spray water of the plate-fin indirect evaporative cooling unit and the dew point indirect evaporative cooling unit.

Claims (7)

1. The air conditioning unit based on plate fin-dew point two-stage indirect evaporative cooling is characterized by comprising a direct evaporative cooling unit (15) and plate fin-dew point two-stage indirect evaporative cooling units (3) symmetrically arranged on the left side and the right side of the direct evaporative cooling unit (15), wherein two first air inlets (21) are symmetrically arranged on the left side and the right side of the direct evaporative cooling unit (15), one sides of the two plate fin-dew point two-stage indirect evaporative cooling units (3) close to the direct evaporative cooling unit (15) are respectively provided with a first air outlet, and the two first air inlets (21) are respectively communicated with the first air outlets of the plate fin-dew point two-stage indirect evaporative cooling unit (3) on the corresponding side;

the direct evaporative cooling unit (15) comprises a shell a, a water baffle (19), a first water distributor (18), a first filler (16) and a first water tank (22) are sequentially arranged in the shell a from top to bottom, the first water distributor (18) is connected with the first water tank (22) through a water pipe G1, a second air outlet (23) is formed in the top of the shell a corresponding to the upper side of the water baffle (19), and two first air inlets (21) are symmetrically arranged on the left side and the right side of the shell a corresponding to the lower side of the first filler (16);

And a fan (20) is arranged in the second air outlet (23).

2. the plate-fin-dew point two-stage indirect evaporative cooling-based air conditioning unit as claimed in claim 1, wherein a first water pump (17) is arranged on the water pipe G1.

3. the plate fin-dew point two-stage indirect evaporative cooling-based air conditioning unit as claimed in claim 1, characterized in that the plate fin-dew point two-stage indirect evaporative cooling unit (3) comprises a shell b, a first air outlet is arranged on one side of the shell b close to the direct evaporative cooling unit (15), a second air inlet (1) is arranged on one side of the shell b far away from the direct evaporative cooling unit (15), a coarse filter (2), a plate-fin indirect evaporative cooling unit and a dew point indirect evaporative cooling unit (8) are sequentially arranged in the shell b according to the air flowing direction, a third air outlet (24) is arranged at the top of the shell b corresponding to the upper part of the plate-fin indirect evaporative cooling unit, a fourth air outlet (25) is formed in the top of the shell b corresponding to the upper part of the dew point type indirect evaporative cooling unit (8);

The bottom still is provided with second water tank (5) in the casing b, second water tank (5) are located the indirect evaporative cooling unit of plate-fin and dew point formula and evaporate unit (8) below, second water tank (5) lead to pipe G2 and water pipe G3 and are connected with the indirect evaporative cooling unit of plate-fin and dew point formula and evaporate unit (8) respectively.

4. The plate fin-dew point two-stage indirect evaporative cooling-based air conditioning unit as claimed in claim 3, wherein the plate fin type indirect evaporative cooling unit comprises a second water distributor (6) and a plate fin type indirect evaporative cooler (4) which are arranged from top to bottom in sequence; the air distribution device is characterized in that a secondary air fan a (7) is arranged in the third air outlet (24), the second water tank (5) is located below the plate-fin indirect evaporative cooler (4), the second water distributor (6) is connected with the second water tank (5) through a water pipe G2, and a second water pump (9) is arranged on the water pipe G2.

5. The plate fin-dew point two-stage indirect evaporative cooling-based air conditioning unit as claimed in claim 3, wherein the dew point indirect evaporative cooling unit (8) comprises a third water distributor (12) and a dew point indirect evaporative cooler (10) which are arranged in sequence from top to bottom; be provided with secondary air fan b (13) in fourth air outlet (25), second water tank (5) are located dew point formula indirect evaporative cooler (10) below, third water-locator (12) are connected with second water tank (5) through water pipe G3, be provided with third water pump (11) on the water pipe G3.

6. the plate fin-dew point two-stage indirect evaporative cooling-based air conditioning unit as claimed in claim 5, wherein the fourth air outlet (25) is further connected with a secondary exhaust air pipe (14).

7. The plate-fin-dew point two-stage indirect evaporative cooling-based air conditioning unit as recited in claim 6, wherein the bottom of the first packing (16) is V-shaped.