CN210802114U - A double working condition pre-cooling type closed evaporative cooling tower - Google Patents

Abstract

The utility model discloses a double working condition pre-cooling type closed evaporative cooling tower, comprising a cabinet body, the cabinet body is divided into a wet channel and a dry channel in sequence from top to bottom; the wet channel includes air inlets located on corresponding two sides of the cabinet body a and the air outlet b, the air inlet a is provided with a water distributor b, a surface cooler and a closed evaporative cooling coil device in sequence according to the air flow direction, and the top of the closed evaporative cooling coil device is provided with a water distributor a , an air inlet c is provided on the cabinet corresponding to the top of the water distributor a. The closed-type evaporative cooling tower of the utility model combines the evaporative cooling technology with the closed-type cooling tower, realizes two-stage pre-cooling, and obtains cold water with lower temperature; The generation of fouling solves the problem of poor water quality of cold water and avoids the influence of the surface structure of the packing of the open system on the heat exchange efficiency; compared with open cooling towers and other forms of closed cooling towers, the cooling effect is better.

Description

A double working condition pre-cooling type closed evaporative cooling tower

technical field

The utility model belongs to the technical field of air-conditioning equipment, in particular to a double-working-condition pre-cooling type closed evaporative cooling tower.

Background technique

At present, the energy consumption of conventional mechanical refrigeration and air-conditioning systems is getting higher and higher. In conventional mechanical refrigeration and air-conditioning systems, the main function of the cooling tower is to provide cooling water to the condenser to take away the heat of condensation, but the outlet water temperature of the cooling tower will vary with the outdoor temperature. changes in weather parameters.

The cooling tower cooling technology is an energy-saving technology that provides cooling capacity to the building by making full use of the natural cold source in the outdoor air, and the cooling water is cooled by the cooling tower instead of the mechanical refrigeration chiller; when the outdoor air temperature is low, the natural cooling Abundant sources, suitable for cooling tower cooling technology.

Compared with the traditional mechanical refrigeration system, when the outdoor meteorological parameters meet the conditions, the use of cooling tower cooling technology has huge energy saving potential and economic benefits. At present, due to the serious water pollution of the cooling tower, the water quality problem affects the efficiency of the unit, which leads to the insufficient cooling range of the closed cooling tower, and it is easy to freeze when used in winter.

Utility model content

The purpose of the utility model is to provide a double working condition pre-cooling type closed evaporative cooling tower, which solves the problems of serious water pollution of the existing cooling tower and easy freezing in winter use.

The technical scheme adopted by the utility model is that a double-working-condition pre-cooling type closed evaporative cooling tower comprises a cabinet body, and the cabinet body is divided into a wet channel and a dry channel in sequence from top to bottom;

The wet channel includes an air inlet a and an air outlet b located on the corresponding two sides of the cabinet. The air inlet a is provided with a water distributor b, a surface cooler and a closed evaporative cooling coil device in sequence according to the air flow direction. A water distributor a is arranged on the top of the cooling coil device, and an air inlet c is arranged on the cabinet corresponding to the top of the water distributor a.

The utility model is also characterized in that,

An exhaust fan b is arranged in the exhaust port b.

The dry channel includes an air inlet a and an air outlet b on the corresponding two sides of the cabinet body, and an air filter and a filler are arranged in the air inlet a in sequence according to the air flow direction;

There is also a water tank at the bottom of the air filter and filler.

An exhaust fan a is arranged in the exhaust port b.

The water distributor a and the water tank are connected through the water pipe G1 and the water pipe G2;

The water distributor b and the water tank are connected through the water pipe G3 and the water pipe G2;

The water pipe G2 is also provided with a water pump and an electronic water treatment device in sequence.

Closed evaporative cooling coil units consist of coils in a continuous "S" shape.

The water distributor a is a drip-type water distributor;

The water distributor b is a high-pressure micro-mist water distributor.

The beneficial effects of the present utility model are:

(1) The closed-type evaporative cooling tower of the utility model organically combines the evaporative cooling technology with the closed-type cooling tower, the unit structure is compact, and the floor space is effectively reduced; it is suitable for areas requiring continuous and reliable operation, high water costs or limited water supply On occasions, effectively reduce the waste of water resources and energy;

(2) The closed-type evaporative cooling tower of the present utility model realizes the two-stage cooling of the return water through the spray pre-cooling of the surface cooler and the indirect cooling of the closed-type evaporative cooling coil, and finally obtains cold water with a lower temperature, which is more energy-saving;

(3) The closed-type evaporative cooling tower of the utility model places cold water in the surface cooler and the closed-type evaporative cooling coil, the water does not directly contact with the air, and the indirect heat exchange is carried out through the pipe wall and the water film outside the pipe to reduce cold water fouling It solves the problem of poor water quality of the obtained cold water and avoids the influence of scaling on the surface of the packing of the open system on the heat exchange efficiency;

(4) In the closed-type evaporative cooling tower of the present invention, after the spray water above the unit exchanges heat with the closed-type evaporative cooling coil device, it falls into the lower layer of packing and directly contacts with the air to generate a direct evaporative cooling process, and the obtained temperature is relatively low. Compared with open cooling towers and other forms of closed cooling towers, indirect evaporative cooling towers have better cooling effects.

Description of drawings

Figure 1 is a schematic structural diagram of a dual-working-condition pre-cooling type closed evaporative cooling tower of the present invention.

In the figure, 1. Air inlet b, 2. Surface cooler, 3. Air inlet a, 4. Air filter, 5. Water pump, 6. Electronic water treatment device, 7. Water tank, 8. Air outlet a, 9 . Exhaust fan a, 10. Packing, 11. Exhaust port b, 12. Exhaust fan b, 13. Coil, 14. Closed evaporative cooling coil device, 15. Water distributor a, 16. Air inlet c, 17. Water distributor b, 18. Cabinet.

Detailed ways

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

The utility model is a double working condition pre-cooling type closed evaporative cooling tower, as shown in FIG. 1 , including a cabinet 18, adopting a cabinet structure, and can selectively open different parts according to different outdoor weather conditions, which is the end Provide cold water at different temperatures to meet the temperature and humidity requirements of indoor air.

The cabinet body 18 is divided into a wet channel and a dry channel in sequence from top to bottom;

The wet channel includes an air inlet b1 and an air outlet b11 located on the corresponding two sides of the cabinet 18. The air inlet b1 is provided with a high-pressure micro-mist water distributor b17, a surface cooler 2 and a closed evaporative cooling plate in sequence according to the air flow direction. The pipe device 14, the top of the closed evaporative cooling coil device 14 is provided with a drip-type water distributor a15, and the cabinet 18 corresponding to the top of the water distributor a15 is provided with an air inlet c16.

A centrifugal exhaust fan b12 is provided in the exhaust port b11.

The dry passage includes an air inlet a3 and an air outlet a8 on the corresponding two sides of the cabinet 18, and an air filter 4 and a filler 10 are arranged in the air inlet a3 in sequence according to the air flow direction, and the filler 10 adopts GLASdek inorganic filler;

A water tank 7 is also provided at the bottom of the air filter 4 and the filler 10 .

A centrifugal exhaust fan a9 is arranged in the air outlet a8.

The water distributor a15 and the water tank 7 are connected through the water pipe G1 and the water pipe G2;

The water distributor b17 and the water tank 7 are connected through the water pipe G3 and the water pipe G2;

The water pipe G2 is also provided with a water pump 5 and an electronic water treatment device 6 in sequence.

The closed evaporative cooling coil arrangement 14 includes coils 13 in a continuous "S" shape.

The working process of the double-working-condition pre-cooling type closed evaporative cooling tower of the present invention is as follows:

(1) Wind system

The outdoor fresh air enters the cabinet 18 through the air inlet b1, and the air directly contacts the water droplets atomized by the water distributor b17 to cause a direct evaporative cooling process, which pre-cools the surface cooler 2. The direct evaporative cooling process occurs in direct contact with the spray water of the water distributor a15, which cools the closed evaporative cooling coil device 14, and finally discharges the unit through the exhaust port b11 under the action of the exhaust fan b12.

Under the action of the exhaust fan a9, the outdoor fresh air enters through the air inlet a3, and after being filtered and purified by the air filter 4, it is in direct contact with the water film on the surface of the filler 10, and isoenthalpy cooling occurs, and the circulating water with a lower temperature is obtained and discharged.

(2) Water system

Under the action of the water pump 5, the circulating water in the water tank 7 is sprayed on the surface of the closed evaporative cooling coil device 14 through the water distributor a15 for cooling. The lower circulating water falls into the water tank 7; the other part of the circulating water is sprayed out through the high-pressure micro-mist water distributor b17 and sprayed on the surface of the surface cooler 2 to pre-cool the surface cooler 2.

The return water at the indoor end enters the surface cooler 2 of the unit through the water pipe to be pre-cooled, and then enters the coil 13 in the closed evaporative cooling coil device 14, and is displayed through the pipe wall and the water film covered by the pipe. After the heat exchange is cooled, it is supplied to the indoor end, and the cycle is repeated.

(3) Wet operating mode

When the whole machine is turned on, the outdoor fresh air enters through the air inlet b1 under the action of the exhaust fan b12, the water distributor b17 is a high-pressure micro-mist type, and the air and water are in direct contact with the direct evaporative cooling process, and the surface cooler 2 is pre-cooled; and At the same time, the fresh air from the upper part of the unit enters the unit through the air inlet c16 and is in direct contact with the circulating water sprayed by the drip-type water distributor a15, resulting in direct evaporative cooling and other enthalpy cooling. After cooling the surface of the closed evaporative cooling coil device 14, The circulating water falls to the packing 10 below, and the fresh air from the lower part of the unit enters the unit through the air inlet a3. After being filtered and purified by the air filter 4, the packing 10 and the circulating water undergo direct evaporative cooling to obtain circulating water with a lower temperature. Under the action of the water pump 5, it enters the water distributor a15 and the water distributor b17, and so on.

In this mode, the end return water first enters the surface cooler 2 for pre-cooling, and then enters the coil 13 in the closed evaporative cooling coil device 14 through the water pipe for cooling, and then sends the low-temperature return water to the room to absorb heat. Then return to the outdoor unit to dissipate heat.

(4) Dry operating mode

The water pump 5, the water distributor a15, the water distributor b17, and the exhaust fan a9 are turned off, and the water in the water tank 7 is emptied to avoid the problems of antifreeze and water treatment in winter. The end return water enters the closed evaporative cooling coil device 14 from the surface cooler 2, and the outdoor low-temperature air cools the surface cooler 2 and the closed evaporative cooling coil device 14 in turn, and sends the low-temperature return water to the indoor to absorb heat, After the heat is absorbed and heated up, it is returned to the outdoor unit to dissipate heat. At this time, there is no evaporative consumption of water, and no white fog is produced at all.

The closed evaporative cooling tower of the utility model combines the evaporative cooling technology with the closed cooling tower to realize two-stage precooling and obtain cold water with lower temperature; the cold water is placed in the surface cooler 2 and the closed evaporative cooling coil device 14, It reduces the generation of cold water fouling, solves the problem of poor cold water water quality, and avoids the influence of the surface structure of the filler in the open system on the heat exchange efficiency; compared with open cooling towers and other forms of closed cooling towers, the cooling effect is better. .

Claims (7)

1. A double-operating-condition pre-cooling type closed evaporative cooling tower, characterized in that it comprises a cabinet (18), and the cabinet (18) is divided into a wet channel and a dry channel in turn from top to bottom; The wet channel includes an air inlet b(1) and an air outlet b(11) located on corresponding two sides of the cabinet body (18), and a water distributor b is arranged in the air inlet b(1) in sequence according to the air flow direction. (17), a surface cooler (2) and a closed evaporative cooling coil device (14), the top of the closed evaporative cooling coil device (14) is provided with a water distributor a (15), the water distribution The cabinet (18) corresponding to the top of the appliance a (15) is provided with an air inlet c (16). 2 . The pre-cooling type closed evaporative cooling tower according to claim 1 , wherein an exhaust fan b ( 12 ) is arranged in the exhaust port b ( 11 ). 3 . 3. A dual-working-condition pre-cooling type closed evaporative cooling tower according to claim 1, characterized in that the dry passage comprises air inlets a (3) and exhaust ports on corresponding sides of the cabinet (18) an air inlet a (8), an air filter (4) and a filler (10) are sequentially arranged in the air inlet a (3) according to the air flow direction; A water tank (7) is also provided at the bottom of the air filter (4) and the filler (10). 4 . The pre-cooling type closed evaporative cooling tower according to claim 3 , wherein an exhaust fan a ( 9 ) is arranged in the air outlet a ( 8 ). 5 . 5. A kind of pre-cooling type closed evaporative cooling tower according to claim 3, characterized in that, the water distributor a (15) and the water tank (7) are connected by a water pipe G1 and a water pipe G2; The water distributor b (17) and the water tank (7) are connected through the water pipe G3 and the water pipe G2; The water pipe G2 is also provided with a water pump (5) and an electronic water treatment device (6) in sequence. 6. A dual-working-condition pre-cooling type closed evaporative cooling tower according to claim 1, wherein the closed evaporative cooling coil device (14) comprises a continuous "S"-shaped coil ( 13). 7. A kind of pre-cooling type closed evaporative cooling tower according to claim 1, characterized in that, the water distributor a (15) is a drip-type water distributor; The water distributor b (17) is a high-pressure micro-mist water distributor.

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