CN203215898U - Cross-flow plate-fin indirect evaporative cooling outdoor unit - Google Patents

Abstract

The utility model discloses a cross-flow plate-fin type indirect evaporative cooling outdoor unit, which includes an organic unit casing. The two opposite side walls of the unit casing are respectively provided with an air inlet and an air supply port a, and the fresh air enters the unit casing. A filter, a cross-flow plate-fin dew point indirect evaporative cooler and a direct evaporative cooling coil with an evaporative cooling coil are arranged in sequence, and a water baffle a and a drain are arranged above the cross-flow plate-fin dew point indirect evaporative cooler Fan a and exhaust fan a correspond to an exhaust outlet a on the top wall of the unit shell, and water baffle b and exhaust fan b are arranged in sequence above the direct evaporative cooler with evaporative cooling coils, and exhaust fan b corresponds to An exhaust port b is provided on the top wall of the casing of the unit. The outdoor unit of the closed cross-flow plate fin dew point indirect evaporative cooling of the utility model is a closed system, which can produce cold air and cold water at the same time, and has a simple structure and high cooling effect.

Description

A cross-flow plate-fin type indirect evaporative cooling outdoor unit

technical field

The utility model belongs to the technical field of air-conditioning and refrigeration equipment, in particular to an outdoor unit for cross-flow plate-fin type indirect evaporative cooling.

Background technique

Evaporative cooling air-conditioning technology uses the principle of heat and moisture exchange between water and air to prepare cold air and cold water. At present, most of the evaporative cooling high-temperature chillers that produce cold water produce high-temperature cold water at 16-18°C through indirect evaporative cooling or indirect-direct evaporative cooling, which can be passed into fresh air units or terminal dry coils to meet air conditioning requirements. Demand; Most of the units that produce cold air are cooled by indirect evaporative cooling or indirect-direct evaporative cooling. Water evaporation absorbs the heat of the air to produce cold air and send it into the room to meet the demand. However, at present, there are relatively few studies on evaporative cooling air conditioners that can produce cold water and cold air at the same time, and the outlet water and air temperature of evaporative cooling air conditioners are related to outdoor meteorological parameters. Due to the wet bulb temperature of the inlet air, the temperature drop is limited. In addition, the efficiency of indirect evaporative cooling is also affected by other factors. For example, in the dry area of Northwest China, the wind and sand in the outdoor air are large, and the dust filtered by the filter is limited. After long-term use, a large amount of dust will be deposited on the wall of the indirect evaporative cooler. Dirt, which adhere to the surface of the heat exchanger, will inevitably affect the efficiency of the heat exchanger, causing the temperature of the air and water produced to fail to meet the predetermined requirements, and the high-temperature cold water produced will also be polluted and may block pipeline.

The dew point indirect evaporative cooler can realize multi-stage indirect evaporative cooling and cooling, and use the wet bulb temperature of the secondary air to continuously reduce the heat and moisture exchange, and reduce the temperature of the air and water to the dew point temperature of the inlet air. The outlet water temperature of dew point indirect evaporative cooling is lower than that of traditional indirect evaporative cooling. Using evaporative cooling coils, the circulating water produced does not contact with the spray water, avoiding the pollution of cold water. The cross-flow plate-fin dew point indirect evaporative cooler can effectively reduce the temperature of the air outlet, and combined with the evaporative cooling coil, it can reduce the temperature of the cold water and avoid water pollution.

Utility model content

The purpose of the utility model is to provide a cross-flow plate-fin type indirect evaporative cooling outdoor unit, which not only has a simple structure and high cooling effect, but also can produce cold air and cold water at the same time.

The technical solution adopted by the utility model is that a cross-flow plate-fin type indirect evaporative cooling outdoor unit includes an organic unit casing, and the two side walls opposite to the unit casing are respectively provided with an air inlet and an air supply port a, and the unit According to the incoming direction of the fresh air, the housing is provided with a filter, a cross-flow plate-fin dew point indirect evaporative cooler and a direct evaporative cooling coil with an evaporative cooling coil. Water plate a and exhaust fan a, the top wall of the unit shell corresponding to exhaust fan a is provided with an exhaust port a, and the top of the direct evaporative cooler with evaporative cooling coil is provided with a water barrier b and an exhaust fan b in turn, An exhaust port b is provided on the top wall of the casing of the unit corresponding to the exhaust fan b.

The utility model is also characterized in that,

The cross-flow plate-fin dew point indirect evaporative cooler includes a cross-flow plate-fin dew point indirect heat exchanger. The lower part of the heat exchanger is provided with an open water collection tank a, and the open water collection tank a is respectively provided with a circulating water pump a, a water processor a and a water supply valve a, and the water distributor a is connected with the circulating water pump a and the water processor in turn through the water pipe a connection.

The cross-flow plate-fin dew point indirect heat exchanger includes multiple heat exchange units arranged in parallel, and a partition plate is arranged between every two adjacent heat exchange units, and the interval between the partition plate and the heat exchange unit forms a wet Channels and dry channels, each heat exchange unit is provided with multiple rows of through holes in parallel, and the number of through holes at the primary air inlet end gradually decreases from bottom to top in each row. A row of through holes is provided from bottom to top.

The direct evaporative cooler with evaporative cooling coil includes packing, the upper part of the packing is provided with a water distributor b, and the lower part of the packing is provided with an evaporative cooling coil, an air duct and an open water collection tank b in turn, and the air duct is close to the unit shell A water baffle c is provided at the air supply port a on the side wall of the body, and a blower fan is provided between the water baffle c and the air supply port a, and a water supply valve b, a water processor b, and a circulating water pump b are respectively provided in the open water collection tank b. The water distributor b is sequentially connected with the water processor b and the circulating water pump b through the water supply pipe.

The water inlet end of the evaporative cooling coil is connected with the return pipe, and the water outlet end of the evaporative cooling coil is connected with the water supply pipe.

The cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model has the following characteristics:

1) The outdoor unit of this utility model adopts a cross-flow plate-fin dew point indirect evaporative cooler, which uses 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 The cold wind approaches the dew point temperature of the inlet air and reaches the sub-humidity bulb temperature.

2) The outdoor unit of the utility model passes through the air of the "sub-wet bulb" temperature produced by the cross-flow plate-fin dew point evaporative cooler, and a part of it performs heat and moisture exchange between the evaporative cooling coil and the packing, thereby producing lower temperature of cold water.

3) The outdoor unit of the utility model utilizes indirect evaporative cooling and direct evaporative cooling, can produce cold water and cold air at the same time, and provide high-temperature cold water and fresh air for the indoor end without setting up a fresh air unit.

4) The evaporative cooling coil is used in the outdoor unit of the utility model, and the spray water outside the pipe does not directly contact the circulating water in the pipe, which overcomes the sandstorm and dust in the northwest region, does not cause pollution of the circulating water, and avoids blocking the pipe .

5) The outdoor unit of this utility model adopts a closed water system. The water pump head of the air conditioning system is low. It only needs to overcome the loop resistance of the closed water system, which has nothing to do with the height of the building. The power consumption of transmission is small, and it is more energy-saving.

6) In the outdoor unit of the utility model, two open water collection tanks are used to set up separately, and the open water collection tank of the cross-flow plate-fin dew point indirect evaporative cooler, the circulating water device, the water distributor and the open type of the evaporative cooling coil The water collection tank, circulating water device, and water distributor are set separately and independent of each other, avoiding the mixing of the circulating water sprayed by the cross-flow plate-fin dew point indirect evaporative cooler and the sprayed circulating water of the evaporative cooling coil. , affecting the temperature of the high temperature and cold water outlet.

Description of drawings

Fig. 1 is a structural schematic diagram of a cross-flow plate-fin type indirect evaporative cooling outdoor unit of the present invention;

Fig. 2 is a structural schematic diagram of the cross-flow plate-fin dew point indirect evaporative cooler in the cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model;

Fig. 3 is a flow chart of air treatment by the cross-flow plate-fin dew point indirect evaporative cooler in the cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model;

Fig. 4 is a structural diagram of an air conditioning system formed by using the cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model.

In the figure, 1. Air inlet, 2. Filter, 3. Cross-flow plate-fin dew point indirect heat exchanger, 4. Water distributor a, 5. Water baffle a, 6. Exhaust fan a, 7. Exhaust fan b, 8. Water baffle b, 9. Water distributor b, 10. Packing, 11. Evaporative cooling coil, 12. Blower fan, 13. Air outlet a, 14. Circulating water pump a, 15. Water processor a, 16. Open water collection tank a, 17. Water supply valve a, 18. Water supply valve b, 19. Open water collection tank b, 20. Water processor b, 21. Circulating water pump b, 22. Dry air disc, 23. Air supply port b, 24. Air exhaust port a, 25 Air exhaust port b, 26. Water return pipe, 27. Water supply pipe, 28. Wet passage, 29. Dry passage, 30. Air supply pipe, 31. Heat exchange unit, 32 . Divider, 33. Water baffle c.

Detailed ways

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

The cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model has a structure as shown in Figure 1, including an organic unit casing, and the two opposite side walls of the unit casing are respectively provided with an air inlet 1 and an air supply port a13. According to the incoming direction of fresh air, filter 2, cross-flow plate-fin dew point indirect evaporative cooler and direct evaporative cooling coil with evaporative cooling coil are installed in the shell of the unit, and the top of the cross-flow plate-fin dew point indirect evaporative cooler is arranged in sequence There are water baffle a5 and exhaust fan a6, and the top wall of the unit casing corresponding to exhaust fan a6 is provided with an air outlet a24, and the top of the direct evaporative cooler with evaporative cooling coil is provided with water baffle b8 and exhaust fan in sequence b7, the top wall of the casing corresponding to the exhaust fan b7 is provided with an exhaust port b25.

The cross-flow plate-fin dew point indirect evaporative cooler, its structure is shown in Figure 1, including a cross-flow plate-fin dew point indirect heat exchanger 3, and the upper part of the cross-flow plate-fin dew point indirect heat exchanger 3 is provided with a water distribution A4, the lower part of the cross-flow plate-fin dew point indirect heat exchanger 3 is provided with an open water collection tank a16, and the open water collection tank a16 is respectively equipped with a circulating water pump a14, a water processor a15, a water supply valve a17, and a water distributor a4 It is connected with circulating water pump a14 and water processor a15 in turn through water pipes.

The cross-flow plate-fin dew point indirect heat exchanger 3 has a structure as shown in Figure 2, including a plurality of heat exchange units 31 arranged in parallel, as shown in Figure 3, between every two adjacent heat exchange units 31 The partition plate 32 is spaced between the partition plate 32 and the heat exchange unit 31 to form a wet channel 28 and a dry channel 29 . Multiple rows of through holes are arranged in parallel on each heat exchange unit 31, and the number of through holes at the primary air inlet end gradually decreases from bottom to top in each row; on the partition plate 32, the primary air enters the direction, along the diagonal from bottom to top A row of through holes is provided. The structure of the direct evaporative cooler with evaporative cooling coil is shown in Figure 1, including packing 10, the upper part of the packing 10 is provided with a water distributor b9, and the lower part of the packing 10 is sequentially provided with an evaporative cooling coil 11, an air duct and the open water collection tank b19, the water baffle c33 is set at the place where the air duct is close to the air supply port a13 on the side wall of the unit casing, and the air blower 12 is provided between the water baffle c33 and the air supply port a13, and the open water collection tank b19 is respectively A water supply valve b18, a water processor b20 and a circulating water pump b21 are provided, and the water distributor b9 is connected to the water processor b20 and the circulating water pump b21 in sequence through a water supply pipe.

The water inlet end of the evaporative cooling coil 11 is connected to the water return pipe 26 , and the water outlet end of the evaporative cooling coil 11 is connected to the water supply pipe 27 .

The air-conditioning system composed of the cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model has a structure as shown in Figure 4. The air supply port a13 of the outdoor unit for the closed-type cross-flow plate-fin dew point indirect evaporative cooling passes through the air supply pipe 30 Connected to the indoor air outlet b23, the evaporative cooling coil 11 in the outdoor unit of the closed cross-flow plate-fin dew point indirect evaporative cooling is connected to the dry air pan 22 in the outdoor unit through the return pipe 26 and the water supply pipe 27 respectively.

The primary air enters the cross-flow plate-fin dew point indirect heat exchanger 3 horizontally, and part of the air enters the wet channel through the orifice to become secondary air, and the secondary air is indirectly exchanged with the water sprayed from the water distributor a4 at the cross-flow plate-fin dew point The water film formed on the surface of the heat exchanger 3 conducts heat and moisture exchange, and the air temperature is lowered. At the same time, the secondary air transfers cold energy to the primary air in the dry channel of the heat exchanger, reducing the temperature of the primary air. Along the direction of the orifice of the cross-flow plate-fin dew point indirect heat exchanger 3, a part of the primary air whose temperature has been reduced continuously becomes secondary air, so that the wet bulb temperature of the secondary air in the wet channel 28 is continuously reduced, which is different from that of the dry channel. After a heat and moisture exchange of air at 29, the temperature also decreases gradually, which can approach the dew point temperature at the inlet of the heat exchanger.

The evaporative cooling coil 11 uses the pre-cooled air and the water film formed outside the evaporative cooling coil 11 to exchange heat and moisture with the water distributor b9 spraying circulating water, and the water temperature of the evaporative cooling coil 11 spraying circulating water approaches the pre-cooling The wet bulb temperature of the air, the circulating water sprayed by the evaporative cooling coil 11 conducts heat exchange with the circulating water in the tube wall of the evaporative cooling coil 11, thereby producing high-temperature cold water between the dew point temperature of the outdoor air and the wet bulb temperature . The filler 10 arranged above the evaporative cooling coil 11 can increase the area and time of heat and moisture exchange between air and water, and reduce the temperature of the spray water reaching the surface of the evaporative cooling coil 11, thereby improving the circulation in the evaporative cooling coil 11. The water temperature is lower.

The working process of the cross-flow plate-fin type indirect evaporative cooling outdoor unit of the utility model is as follows:

Outdoor fresh air or indoor return air enters the cross-flow plate-fin dew point indirect heat exchanger 3 of the cross-flow plate-fin dew point indirect evaporative cooler through the air inlet 1 and the filter 2, and the primary air enters the dry channel 29 and passes through the cross-flow plate Part of the orifice of the finned dew point indirect heat exchanger 3 enters the wet channel 28 of the cross-flow plate-fin dew point indirect heat exchanger 3 and becomes secondary air; viewed from the horizontal direction of the cross-flow plate-fin dew point indirect heat exchanger 3 , the primary air entering the cross-flow plate-fin dew point indirect heat exchanger 3 dry channel 29 is the most, and is wet-cooled, and the wet-cooled air enters the direct evaporative cooler with evaporative cooling coil on the right; through the hole The air at the mouth becomes the secondary air and the water film formed on the surface of the cross-flow plate-fin dew point indirect heat exchanger 3 by the circulating water sprayed by the water distributor a4 performs heat and moisture exchange, the temperature drops, and the cold energy passes through the cross-flow plate fin The primary air delivered to the dry channel 29 by the wall of the dew point indirect heat exchanger 3 is discharged outdoors through the water retaining plate a5 and the exhaust fan a6, and the spray water finally falls into the open water collection tank a16 set below, and is treated by water pipes and water The device a15 and the circulating water pump a14 are connected with the water distributor a4 to form a loop, and the open water collection tank a16 can be supplemented by the water supply valve a17.

Part of the air with reduced temperature entering the right side of the unit shell is directly sent to the indoor room through the water baffle c33, the blower 12, the air supply port a13, the air supply pipe 30 and the air supply port b23; the indoor return water is sprayed by the water distributor b9 Spray on the filler 10, and then fall on the surface of the evaporative cooling coil 11 to form a uniform water film, and another part of the air exchanges heat and moisture with the water film on the evaporative cooling coil 11, taking away the heat of the spray water, and the spray water will This part of the cold energy is transferred to the circulating water in the evaporative cooling coil 11, and the circulating water is transported back to the indoor dry-type fan plate 22 through the pipeline, and the heated air continues upward to exchange heat and moisture with the water film on the surface of the filler 10, and the pre-cooling room returns The water is discharged outdoors through the water retaining plate b8 and the exhaust fan b7, and the spray water finally falls into the open water collection tank b19 below, passes through the water processor b20 and the circulating water pump b21, and is connected with the water distributor b9 to form a loop and open Type water collecting tank b19 can carry out replenishing water through replenishing water valve b18.

The cross-flow plate-fin indirect evaporative cooling outdoor unit of the utility model combines a cross-flow plate-fin dew point indirect evaporative cooler, cooling coils, packing, etc. to form a closed outdoor unit, which can be used in places that require fresh air and cold water at the same time. The site avoids resetting the fresh air unit, which has the characteristics of energy saving and environmental protection.

Claims (5)

1. a distributary plate fin type indirect evaporative cools off off-premises station, it is characterized in that, include machine unit shell, be respectively arranged with air inlet (1) on relative two sidewalls of described machine unit shell, air outlet a(13), be disposed with filter (2) by new wind approach axis in the described machine unit shell, the direct evaporative cooler of distributary plate-fin dew point indirect evaporation cooler and band evaporative cooling coil pipe, the top of described distributary plate-fin dew point indirect evaporation cooler is disposed with water fender a(5) and exhaust blower a(6), described exhaust blower a(6) Dui Ying machine unit shell roof is provided with exhaust outlet a(24), the top of the direct evaporative cooler of described band evaporative cooling coil pipe is disposed with water fender b(8) and exhaust blower b(7), described exhaust blower b(7) corresponding machine unit shell roof is provided with exhaust outlet b(25).

2. distributary plate fin type indirect evaporative according to claim 1 cools off off-premises station, it is characterized in that, described distributary plate-fin dew point indirect evaporation cooler, include distributary plate-fin dew point indirect heat exchanger (3), the top of described distributary plate-fin dew point indirect heat exchanger (3) is provided with water-locator a(4), the bottom of described distributary plate-fin dew point indirect heat exchanger (3) is provided with open type header tank a(16), described open type header tank a(16) is respectively arranged with water circulating pump a(14 in), hydrotreater a(15) and water compensating valve a(17), described water-locator a(4) by water pipe successively with described water circulating pump a(14) with hydrotreater a(15) be connected.

3. distributary plate fin type indirect evaporative according to claim 2 cools off off-premises station, it is characterized in that, described distributary plate-fin dew point indirect heat exchanger (3), include a plurality of heat exchange units that be arranged in parallel (31), be provided with demarcation strip (32) between described every adjacent two heat exchange units (31), form wet channel (28) and dry passage (29) between demarcation strip (32) and the heat exchange unit (31) at interval, each heat exchange unit is arranged with the multirow through hole in parallel on (31), every row from top to bottom, the number of openings of a wind upstream end reduces gradually, and demarcation strip (32) is gone up with a wind approach axis, be provided with delegation's through hole from top to bottom along diagonal.

4. distributary plate fin type indirect evaporative according to claim 1 cools off off-premises station, it is characterized in that, the direct evaporative cooler of described band evaporative cooling coil pipe, include filler (10), the top of described filler (10) is provided with water-locator b(9), the bottom of described filler (10) is disposed with evaporative cooling coil pipe (11), air channel and open type header tank b(19), the close machine unit shell sidewall air outlet a(13 in described air channel) locates to be provided with water fender c(33), described water fender c(33) and described air outlet a(13) between be provided with pressure fan (12), described open type header tank b(19) is respectively arranged with water compensating valve b(18 in), hydrotreater b(20) and water circulating pump b(21), described water-locator b(9) by feed pipe successively with described hydrotreater b(20) with described water circulating pump b(21) be connected.

5. distributary plate fin type indirect evaporative according to claim 4 cools off off-premises station, it is characterized in that, the water inlet end of described evaporative cooling coil pipe (11) is connected with return pipe (26), and the water side of described evaporative cooling coil pipe (11) is connected with feed pipe (27).

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