CN111288598A - Dew point indirect evaporative cooler with movable water distribution function - Google Patents

Abstract

The invention discloses a dew point indirect evaporative cooler with a movable water distribution function, which comprises a movable water distributor, a cross-flow dew point indirect evaporative cooling heat exchange core and a water collecting tank which are sequentially arranged from top to bottom, wherein the movable water distributor is connected with the water collecting tank through a circulating water hose and a circulating water pipe which are sequentially connected; the water distributor also comprises a pair of rails fixed on the unit shell, and the movable water distributor is matched with the pair of rails for use. The dew point indirect evaporative cooler with the function of moving water distribution can solve the problems of uneven water distribution, easy scaling and high energy consumption of the dew point indirect evaporative cooler.

Description

A dew point indirect evaporative cooler with mobile water distribution function

technical field

The invention belongs to the technical field of air conditioning system equipment, and in particular relates to a dew point indirect evaporative cooler with a mobile water distribution function.

Background technique

Evaporative cooling air conditioning technology is a renewable energy source that utilizes dry air energy, relies on the difference between the dry bulb temperature and the wet bulb temperature in the ambient air, and obtains cooling capacity through the exchange of heat and moisture between water and air, an environmentally friendly, efficient and economical method. The cooling method has the characteristics of energy saving, environmental protection, economy and health.

Evaporative coolers mainly have two basic forms: direct evaporative coolers and indirect evaporative coolers. Generally, there are two air flows through the indirect evaporative cooler. They are not in contact with each other. They are divided into primary air and secondary air. The primary air is the output air, which refers to the air that needs to be cooled. The secondary air is the working air, which evaporates in contact with water, thereby reducing the temperature of the surface of the heat exchanger to cool the primary air, which mainly comes from the outside, and is discharged to the outside after use. At present, indirect evaporative coolers can be divided into two types: partition type and dew point type. When the traditional partition type indirect evaporative cooler is used alone, the limit of the supply air temperature is the wet bulb temperature of the secondary air. Due to the limited temperature drop, it cannot be used for The room provides a satisfactory supply air temperature, and the use of dew point indirect evaporative cooling can reduce the supply air temperature to below the wet bulb temperature of the secondary air, making it close to the dew point temperature and improving the heat exchange efficiency.

At present, the dew point indirect evaporative coolers on the market have uneven water distribution, which is easy to form a "dry spot" locally, resulting in poor heat exchange effect, and it is easy to form scale locally in the "dry spot". At the same time, the traditional dew point indirect evaporative coolers are mostly counter-flow structures, which will cause the speed direction of the primary air in the dry channel to change when it enters the wet channel of the secondary air after pre-cooling, resulting in increased resistance and increased fan energy consumption. The efficiency is reduced and the air supply effect is affected.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dew point indirect evaporative cooler with a mobile water distribution function, which can solve the problems of uneven water distribution, easy scaling and high energy consumption of the dew point indirect evaporative cooler.

The technical scheme adopted in the present invention is a dew point indirect evaporative cooler with a mobile water distribution function, comprising a mobile water distributor arranged in sequence from top to bottom, a cross-flow dew point indirect evaporative cooling heat exchange core and The water collecting tank, the mobile water distributor is connected to the water collecting tank through the circulating water hose and the circulating water pipe connected in sequence; it also includes a pair of rails fixed on the unit shell, and the mobile water distributor is used in conjunction with the pair of rails .

The present invention is also characterized in that,

A circulating water pump is arranged on the circulating water pipe.

A water processor is arranged on the circulating water pipe.

The mobile water distributor includes a water distribution pipe and a number of nozzles arranged on the water distribution pipe. The water distribution pipe is provided with two rollers, one of which is used in conjunction with a track. The water pipe is connected to the collecting tank.

The cross-flow dew point indirect evaporative cooling heat exchange core includes a plurality of alternately spaced dry channels and wet channels, a partition plate is arranged between the dry channels and the wet channels, and each dry channel is divided into several equal-sized Heat exchange unit a, each wet channel is divided into several heat exchange units b of the same size, each heat exchange unit a and each heat exchange unit b is an air flow channel, heat exchange unit a and mobile water distribution The heat exchangers are parallel to each other, and the heat exchange unit b and the mobile water distributor are perpendicular to each other; a number of through holes are provided on the partition plate between the part of the heat exchange unit a below the dry channel and the heat exchange unit b of the corresponding wet channel , all through holes are arranged obliquely.

Two through holes are arranged on the partition plate of one heat exchange unit b.

The heat exchange units b of the wet channel are staggered at the through holes, and the part of each heat exchange unit b below the through holes is translated to one side by a distance to form two air flow channels with a right angle of 90°.

The wet channel is made of hydrophilic material, and the heat exchange unit b is provided with a water-absorbing material.

The water-absorbing material is sponge, water-absorbing resin or silica gel.

The beneficial effects of the present invention are:

(1) A dew point indirect evaporative cooler with mobile water distribution function of the present invention adopts the method of moving water distribution, which can effectively improve the uniformity of water distribution, and is conducive to the formation of a uniform water film on the wall surface of the wet channel, Avoid the formation of "dry spots" locally, and the water sprayed back and forth from left to right washes the wall of the wet channel, reduces the accumulation of scale, and enhances the heat exchange efficiency.

(2) A dew point indirect evaporative cooler with a mobile water distribution function of the present invention divides the dry channel and the wet channel into heat exchange units of the same size, which is conducive to the uniform distribution of primary air and secondary air in the flow channel, and Increase the heat transfer surface area.

(3) A dew point indirect evaporative cooler with mobile water distribution function of the present invention, the heat exchange unit b of the wet channel is staggered at the front and rear of the through hole, forming a right angle of 90°, so that the secondary air in the pre-cooling section flows to the front tightly. The adjacent heat exchange unit b increases the heat exchange temperature difference between the primary air and the secondary air, forming a larger temperature gradient and improving the efficiency of indirect evaporative cooling.

(4) A dew point indirect evaporative cooler with mobile water distribution function of the present invention, the wet channel is made of hydrophilic material, and the heat exchange unit b is provided with a water absorbing material, which greatly strengthens the cross-flow dew point indirect evaporative cooler. heat transfer efficiency.

(5) A dew point indirect evaporative cooler with a mobile water distribution function of the present invention utilizes a part of the primary air to enter the wet channel to continuously reduce the wet bulb temperature of the secondary air, thereby reducing the temperature of the primary air and making the output cold air Approaching the dew point temperature of the inlet air, reaching the sub-wet bulb temperature.

Description of drawings

1 is a schematic structural diagram of a dew point indirect evaporative cooler with a mobile water distribution function of the present invention;

2 is a schematic plan view of a mobile water distribution device of a dew point indirect evaporative cooler with a mobile water distribution function of the present invention;

3 is a schematic structural diagram of a mobile water distribution device of a dew point indirect evaporative cooler with a mobile water distribution function of the present invention;

4 is a schematic plan view of the dry and wet passages of a dew point indirect evaporative cooler with a mobile water distribution function of the present invention;

FIG. 5 is a schematic diagram of the dry and wet channel structure of a dew point indirect evaporative cooler with a mobile water distribution function according to the present invention.

In the figure, 1. Dry channel, 2. Water collecting tank, 3. Wet channel, 4. Through hole, 5. Circulating water pipe, 6. Circulating water hose, 7. Mobile water distributor, 8. Roller, 9. Track , 10. Circulating water pump, 11. Water processor, 12. Nozzle, 13. Water distribution pipe, 14. Heat exchange unit b, 15. Heat exchange unit a.

Detailed ways

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

A dew point indirect evaporative cooler with mobile water distribution function of the present invention, as shown in Figures 1-5, includes a mobile water distributor 7 arranged in sequence from top to bottom, a cross-flow dew point indirect evaporative cooling heat exchange core The mobile water distributor 7 is connected to the water collecting tank 2 through the circulating water hose 6 and the circulating water pipe 5 which are connected in sequence; it also includes a pair of rails 9 fixed on the unit casing. The device 7 is used in cooperation with a pair of rails 9 .

In the cross-flow dew point indirect evaporative cooler, except for the cross-flow dew point indirect evaporative cooling heat exchange core, other parts constitute the mobile water distribution device of the indirect evaporative cooler, as shown in Figure 2-3.

The circulating water hose 6 can freely and flexibly reciprocate with the mobile water distributor 7 .

The circulating water pipe 5 is provided with a circulating water pump 10 .

A water processor 11 is provided on the circulating water pipe 5 to prevent the nozzle 12 from being blocked.

The mobile water distributor 7 includes a water distribution pipe 13 and a plurality of nozzles 12 arranged on the water distribution pipe. The water distribution pipe 13 is provided with two rollers 8, one roller 8 is used in conjunction with a rail 9, and the water distribution pipe 13 passes through the water distribution pipe 13 in turn. The connected circulating water hose 6 and circulating water pipe 5 are connected to the water collecting tank 2 .

As shown in Figure 4-5, the cross-flow dew point indirect evaporative cooling heat exchange core includes a plurality of alternately spaced dry channels 1 and 3, and a partition plate is arranged between the dry channels 1 and the wet channels 3.

Each dry channel 1 is divided into several heat exchange units a15 of the same size, and each wet channel 3 is divided into several heat exchange units b14 of the same size. Each heat exchange unit a15 and each heat exchange unit b14 are An air flow channel, the heat exchange unit a15 and the mobile water distributor 7 are parallel to each other, and the heat exchange unit b14 and the mobile water distributor 7 are perpendicular to each other; part of the heat exchange unit a15 below the dry channel 1 and its corresponding wet channel 3 A number of through holes 4 are arranged on the partition plate between the heat exchange units b14, and all the through holes 4 are arranged in an oblique manner.

Two rows of through holes are arranged in parallel along the diagonal from bottom to top in the direction of primary air entry on the partition plate, and there are also two through holes 4 on the partition plate of each corresponding heat exchange unit b14, and the two Hole 4 is on a diagonal.

The heat exchange units b14 of the wet channel 3 are staggered at the through hole 4, and the part of each heat exchange unit b14 below the through hole 4 is translated to one side for a certain distance, forming an air flow channel with two 90° right angles. This structure The turbulent flow of the secondary air is caused, and the better heat and moisture exchange occurs between the secondary air and the water film. Combined with the optimal airflow speed, the high efficiency of the dew point indirect cooler can be obtained.

The wet channel 3 is made of hydrophilic material, and the heat exchange unit b14 is provided with a water-absorbing material, and the water-absorbing material is sponge, water-absorbing resin or silica gel.

Using the mobile water distributor 7, the reciprocating motion causes each heat exchange unit b14 in the wet channel 3 to be covered with a uniform water film instead of a flowing water column. On the one hand, if the amount of spray water is too much, a large water column will form on the wall of the heat exchange unit b14 in the wet channel 3, blocking the flow of the secondary air in the wet channel 3; on the other hand, if the amount of spray water is too small, it will cause Some heat exchange unit b14 walls cannot be wetted to form "dry spots", and local temperature differences will cause poor heat flow and affect the efficiency of the cooler.

The mobile water distributor 7 forms a certain cycle through reciprocating motion, which is equivalent to intermittent water distribution, so that the water film formed on the surface of each heat exchange unit b14 in the wet channel 3 can be fully evaporated during the intermittent water distribution cycle. It is beneficial to the heat and moisture exchange between the secondary air and the water film.

The present invention is a dew point indirect evaporative cooler with a mobile water distribution function, and the working process is as follows:

According to the working process of the water distribution system: the water in the water collecting tank 2 is filtered by the water processor 11, and under the action of the circulating water pump 10, it is transported to the mobile water distributor 7 through the circulating water pipe 5 and the circulating water hose 6, and is installed with The water distributor of the roller 8 moves back and forth on its track 9, so that the spray water is evenly distributed in the wet channel 3 of the cross-flow dew point indirect evaporative cooling heat exchange core, and the spray water flows down by gravity to wet the surface of the wet channel 3 A uniform water film is formed, which exchanges heat and humidity with the secondary air in the wet channel 3, and direct evaporative cooling occurs.

According to the working process of the air system: the primary air enters the heat exchange unit a15 of the dry channel 1 of the dew point indirect evaporative cooler, firstly conducts temperature difference heat exchange with the partition plate of the wet channel 3, and pre-cools the primary air, and part of the primary air passes through The through holes 4 on the partition plate of the heat exchange unit a15 enter the heat exchange unit b14 of the wet channel 3 to become secondary air, and then exchange heat and moisture with the water film formed on the surface of the heat exchange unit b14 of the wet channel 3, so that the water The temperature of the film decreases, and the cold energy is transferred to the primary air in the heat exchange unit a15 of the dry channel 1 through the wall surface of the heat exchange unit b14 of the wet channel 3, so that it is cooled by equal humidity. , the lower the reference temperature of heat and moisture exchange with the water film when it passes through the through hole 4 and is mixed with the secondary air as the secondary air, and finally the primary air in the heat exchange unit b14 of the wet channel 3 is cooled to close to its dew point temperature.

The present invention is a dew point indirect evaporative cooler with the function of moving water distribution. The method of moving water distribution effectively improves the uniformity of water distribution and avoids the partial formation of "dry spots" in the cross-flow dew point indirect evaporative cooler. The accumulation of scale is reduced, and the dry and wet channel structure of the cross-flow dew point indirect evaporative cooler is reasonably optimized to strengthen its heat transfer and improve the heat exchange efficiency.

Claims (9)

1. A dew point indirect evaporative cooler with a movable water distribution function is characterized by comprising a movable water distributor (7), a cross-flow dew point indirect evaporative cooling heat exchange core and a water collecting tank (2) which are sequentially arranged from top to bottom, wherein the movable water distributor (7) is connected with the water collecting tank (2) through a circulating water hose (6) and a circulating water pipe (5) which are sequentially connected; the water distributor also comprises a pair of rails (9) fixed on the unit shell, and the movable water distributor (7) is matched with the pair of rails (9).

2. The dew point indirect evaporative cooler with moving water distribution function as claimed in claim 1, wherein the circulating water pipe (5) is provided with a circulating water pump (10).

3. The dew point indirect evaporative cooler with the function of moving water distribution as claimed in claim 1, wherein the circulating water pipe (5) is provided with a water treatment device (11).

4. The dew point indirect evaporative cooler with the function of moving water distribution according to claim 1, wherein the movable water distributor (7) comprises a water distribution pipe (13) and a plurality of nozzles (12) arranged on the water distribution pipe, two rollers (8) are arranged on the water distribution pipe (13), one roller (8) is matched with one track (9) for use, and the water distribution pipe (13) is connected with the water collection tank (2) through a circulating water hose (6) and a circulating water pipe (5) which are connected in sequence.

5. The dew point indirect evaporative cooler with the function of moving water distribution according to claim 1, wherein the cross-flow dew point indirect evaporative cooling heat exchange core comprises a plurality of dry channels (1) and wet channels (3) which are alternately arranged at intervals, a partition plate is arranged between the dry channels (1) and the wet channels (3), each dry channel (1) is divided into a plurality of heat exchange units a (15) with the same size, each wet channel (3) is divided into a plurality of heat exchange units b (14) with the same size, each heat exchange unit a (15) and each heat exchange unit b (14) are air flow channels, the heat exchange units a (15) are parallel to the moving water distributor (7), and the heat exchange units b (14) are perpendicular to the moving water distributor (7); a plurality of through holes (4) are arranged on a partition plate between a part of heat exchange units a (15) below the dry channel (1) and the corresponding heat exchange units b (14) of the wet channel (3), and all the through holes (4) are arranged in an inclined mode.

6. The dew point indirect evaporative cooler with moving water distribution function as claimed in claim 5, wherein two through holes (4) are provided on the partition plate of one heat exchange unit b (14).

7. The dew point indirect evaporative cooler with moving water distribution function of claim 5, wherein the heat exchange units b (14) of the wet channel (3) are staggered at the through holes (4), and the part of each heat exchange unit b (14) below the through holes (4) is shifted to one side for a certain distance to form two 90-degree right-angled air flow channels.

8. The dew point indirect evaporative cooler with moving water distribution function as claimed in claim 5, wherein the wet channel (3) is made of hydrophilic material, and the heat exchange unit b (14) is provided with water absorbing material.

9. The dew point indirect evaporative cooler with the function of moving water distribution as claimed in claim 8, wherein the water absorbing material is sponge, water absorbing resin or silica gel.

Images