CN202546965U - Water chilling unit capable of using vertical-type dew-point indirect three-stage evaporative cooling - Google Patents

Abstract

The utility model discloses a vertical dew-point indirect three-stage evaporative cooling water chiller, which is composed of a high-temperature air cooler, a dew-point indirect evaporative cooler, and a direct evaporative cooler; the upper part of the dew-point indirect evaporative cooler is arranged from bottom to top There are high-temperature air coolers and primary effect filters, and the direct evaporative coolers are arranged side by side with the high-temperature air coolers and dew-point indirect evaporative coolers. The lower parts of the dew-point indirect evaporative coolers and direct evaporative coolers are respectively provided with water tank b and water tank a. The water tank b is connected to the spraying device arranged on the upper part of the heat exchange tube through the pipeline, and the water tank a is connected to the spraying device of the air conditioner terminal, the fresh air unit, the high temperature air cooler and the direct evaporative cooler in turn through the pipeline. The water chiller of the utility model fully utilizes the advantages of abundant dry air energy in the northwest region of our country, optimizes the structure, can be better applied to the northwest region, and the energy-saving efficiency is also reflected.

Description

Chillers with vertical dew point indirect three-stage evaporative cooling

technical field

The utility model belongs to the technical field of air-conditioning and refrigeration, in particular to a three-stage evaporative cooling chiller composed of a high-temperature air cooler, a dew point indirect evaporative cooler and a direct evaporative cooler.

Background technique

Due to the climatic conditions of high dry bulb temperature and low humidity in Northwest China, the existing evaporative cooling chillers are not perfect in meeting the comfort requirements of the human body when applied in Northwest China, nor can they produce cold water with lower temperature. There are some limitations in practical applications.

Contents of the invention

The purpose of this utility model is to propose a chiller using vertical dew point indirect three-stage evaporative cooling, making full use of dry air for cooling in most places in summer, using two-stage indirect evaporative coolers, of which the second stage uses dew point The indirect evaporative cooler can further reduce the wet bulb temperature corresponding to the dry bulb temperature, which is better than the previous one-stage indirect evaporative cooler. The outlet temperature of the cold water produced by the direct evaporative cooler is lower. The comfort of the human body is greatly increased.

The technical solution adopted by the utility model is to adopt a vertical dew point indirect three-stage evaporative cooling water chiller, which is composed of a high-temperature air cooler, a dew point indirect evaporative cooler, and a direct evaporative cooler; the upper part of the dew point indirect evaporative cooler A high-temperature air cooler and an initial effect filter are arranged from bottom to top, and the direct evaporative cooler is arranged side by side with the high-temperature air cooler and the dew point indirect evaporative cooler. The fan b is installed on the unit shell wall corresponding to the side, and the lower part of the dew point indirect evaporative cooler and the direct evaporative cooler are respectively provided with a water tank b and a water tank. The device is connected, and the pipeline connecting the water tank b and the spraying device is provided with a water pump b and a valve b. The water tank a is connected to the spraying device of the air conditioner terminal, the fresh air unit, the high-temperature air cooler and the direct evaporative cooler in turn through the pipeline, and the water tank a Water pump a is installed on the pipeline connected to the end of the air conditioner, and valve a is installed on the pipeline connected to the fresh air unit and the high-temperature air cooler.

The utility model is also characterized in that,

The heat exchange tubes in the dew point indirect evaporative cooler are vertically arranged, and the lower ends of the heat exchange tubes become shorter as they get closer to the direct evaporative cooler, and each heat exchange tube has a plurality of through holes on the tube wall.

The beneficial effect of the utility model chiller is:

1) The chiller adopts a vertical dew point indirect evaporative cooler, the primary air passes through the heat exchange tube, the secondary air comes from part of the primary air coming out of the small hole in the tube wall, and the spray water flows down the outer wall of the tube; the vertical dew point indirect The bottom of the evaporative cooler is designed with a certain inclination angle, which is conducive to the heat and moisture exchange of the primary air in the third-stage direct evaporative cooler;

2) The temperature of the air treated by the chiller is close to the dew point temperature of the outdoor air, resulting in a lower outlet water temperature of the chiller and a better effect of the chiller;

3) The overall structure of the chiller is reasonable and compact.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model chiller;

Fig. 2 is a sectional view of the heat exchange tube in the vertical dew point indirect evaporative cooler of the water chiller of the utility model.

In the figure, 1. High temperature air cooler, 2. Primary filter, 3. Fan a, 4. Direct evaporative cooler, 5. Water tank a, 6. Water pump a, 7. Air conditioner terminal, 8. Water tank b, 9 . Fresh air unit, 10. Valve a, 11. Water pump b, 12. Valve b, 13. Dew point indirect evaporative cooler, 14. Fan b, 15. Heat exchange tube.

Detailed ways

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

Figure 1 is a structural schematic diagram of an embodiment of the utility model, which adopts the structure of a vertical dew-point indirect three-stage evaporative cooling chiller, which is composed of a high-temperature air cooler 1, a dew-point indirect evaporative cooler 13, and a direct evaporative cooler 4. .

The upper part of dew point indirect evaporative cooler 13 is provided with high temperature air cooler 1 and primary effect filter 2 from bottom to top, direct evaporative cooler 4 is arranged side by side with high temperature air cooler 1 and dew point indirect evaporative cooler 13, and direct evaporative cooling The upper part of the dew point evaporative cooler 4 is provided with a fan a3, the side of the dew point indirect evaporative cooler 13 is provided with a fan b14, and the lower parts of the dew point indirect evaporative cooler 13 and the direct evaporative cooler 4 are respectively provided with a water tank b8 and a water tank a5. The water tank b8 is connected to the spray device arranged on the upper part of the heat exchange tube 15 through a pipe, and the water pump b11 and the valve b12 are installed on the pipe connected to the water tank b8 and the spray device. The air cooler 1 is connected to the spraying device of the direct evaporative cooler 4, the water pump a6 is set on the pipeline connecting the water tank a5 and the air conditioner terminal 7, and the valve a10 is set on the pipeline connecting the fresh air unit 9 and the high temperature air cooler 1.

The heat exchange tubes 15 in the dew point indirect evaporative cooler 13 are vertically arranged, and the lower ends of the heat exchange tubes 15 become shorter as they get closer to the direct evaporative cooler 4 , and each heat exchange tube 15 has a plurality of through holes on the tube wall.

Adopt vertical dew point indirect three-stage evaporative cooling chiller, set high temperature air cooler, dew point indirect evaporative cooler and direct evaporative cooler, fresh air enters the chiller, first passes through the primary filter, and then passes through the high temperature air cooler for pre-cooling , the pre-cooled air enters the second indirect section—the dew point indirect evaporative cooler, which is installed vertically, the primary air passes through the tube, and the secondary air comes from the part of the primary air that comes out of the small hole on the tube wall. The exhaust fan discharges the secondary air to the outside, and the spray water flows down along the outer wall of the pipe. The primary air coming out of the pipe finally exchanges heat and moisture with the direct evaporative cooler, and the final cold water is supplied to the end of the air conditioner for cooling.

The outdoor fresh air entering the chiller first passes through the primary effect filter 2, then passes through the high-temperature air cooler 1 for pre-cooling treatment, and then passes through the dew point indirect evaporative cooler 13 for further wet cooling, and finally passes through the packing with the direct evaporative cooler 4 for heat treatment. Wet exchange to produce the required cold water; the chiller is equipped with two independent water tanks a5 and b8, and finally the high-temperature cold water produced in the water tank a5 is supplied to the air conditioner terminal 7 through the water pump a6 through the pipe network, and the return water is first Lead to the air cooler in the fresh air unit 9, and then return to the water inlet of the high-temperature air cooler 1 through the pipe network through the valve a10, and its water outlet is connected to the direct evaporative cooler 4 for spraying through the network pipe; another water tank b8 After the water pump b11 and the valve b12 to the dew point indirect evaporative cooler 13 for spraying, the water returns to the water tank b8 after spraying.

The specific working process is:

Water system working process:

When running the evaporative cooling chiller, turn on the water pump a6, water pump b11, valve a10, and valve b12. The chiller is equipped with two independent water tanks a5 and b8, so the water system is divided into two parts. One is the chiller system. The cold water taken in the water tank a5 is supplied to the air-conditioning terminal 7 through the water pump a6 through the pipe network, and the return water is first passed to the fresh air unit 9, and then returns to the water inlet of the high-temperature air cooler 1 through the valve a10 through the pipe network, and the water outlet passes through The network pipe is connected to the direct evaporative cooler 4 for spraying, repeating the cycle; secondly, the water tank b8 in the chiller returns to the dew point indirect evaporative cooler 13 for spraying through the water pump b11 and the valve b12, and repeats the cycle.

Wind system working process:

When the chiller is running, the outdoor fresh air enters the unit through the primary filter section 2 to filter the outdoor fresh air, and then passes through the high-temperature air cooler 1. The heat exchange tube 15 of the dew point indirect evaporative cooler 13 is used as primary air, and there are small holes on the tube wall, and the fan b14 is also used. Part of the primary air in the heat exchange tube 15 will pass through the small hole on the tube wall horizontally As the secondary air, the water from the water tank b8 performs heat and moisture exchange with the secondary air through spraying, further reducing the temperature of the primary air in the pipe, and the secondary air passing through the pipe is discharged to the outside of the unit by the fan b14; The primary air of the dew point indirect evaporative cooler 13 reaches the third stage of the chiller, the direct evaporative cooler 4, due to the action of the fan a3, and exchanges heat and moisture with the cold water sprayed from the outlet of the high-temperature air cooler 1 to treat The process is isenthalpic humidification, and finally exhausted by the fan a3 to the outside of the unit.

The water chiller of the utility model adopts two stages of indirect section plus one stage of direct section, and the cold water produced can meet the demand for cooling supply. The vertical dew point indirect evaporative cooler is used, and the temperature drop is lower than that of the general indirect evaporative cooler. The range is larger, which is conducive to the realization of lower outlet water temperature. The chiller only uses two fans and two water pumps, and its energy-saving effect has also been reflected.

The water chiller of the utility model fully utilizes the advantages of abundant dry air energy in Northwest my country, optimizes some previous chillers, and can be better applied to Northwest China, has practical application value, and is also reflected in energy saving.

Claims (2)

1. The chiller adopts vertical dew point indirect three-stage evaporative cooling, which is characterized in that it is composed of high temperature air cooler (1), dew point indirect evaporative cooler (13), and direct evaporative cooler (4); dew point indirect The upper part of the evaporative cooler (13) is provided with a high-temperature air cooler (1) and a primary filter (2) from bottom to top, and the direct evaporative cooler (4) is connected with the high-temperature air cooler (1) and dew point indirect evaporative cooling The devices (13) are arranged side by side, the upper part of the direct evaporative cooler (4) is provided with a fan a (3), and the side of the dew point indirect evaporative cooler (13) is provided with a fan b (14) on the corresponding unit shell wall, The lower parts of the dew point indirect evaporative cooler (13) and the direct evaporative cooler (4) are respectively provided with a water tank b (8) and a water tank a (5), and the water tank b (8) is arranged on the heat exchange tube (15 ) is connected to the spray device on the upper part, the pipeline connecting the water tank b(8) and the spray device is provided with a water pump b(11) and a valve b(12), and the water tank a(5) is connected to the air conditioner terminal (7), The fresh air unit (9), the high temperature air cooler (1) and the spraying device of the direct evaporative cooler (4) are connected, and a water pump a (6) is arranged on the pipe connecting the water tank a (5) and the air conditioner terminal (7) A valve a (10) is arranged on the pipeline connecting the fresh air unit (9) and the high-temperature air cooler (1). 2. The water chiller according to claim 1, characterized in that, the heat exchange tubes (15) in the dew point indirect evaporative cooler (13) are vertically arranged, and the closer the lower ends of the heat exchange tubes (15) are to the direct The evaporative cooler (4) becomes shorter successively, and a plurality of through holes are opened on the tube wall of each heat exchange tube (15).

Images