CN209763378U - Air conditioning unit based on combination of evaporative cooling and mechanical refrigeration - Google Patents

Abstract

The air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration disclosed by the utility model includes a shell a, and the opposite side walls of the shell a are respectively provided with an air inlet and an air outlet, and the inside of the shell a is sequentially arranged according to the primary air flow direction A coarse-effect filter, a direct-indirect evaporative cooling unit, a mechanical refrigeration unit, a first direct evaporative cooler and a centrifugal fan are provided; a condenser is also arranged in the direct-indirect evaporative cooling unit, and the condenser is connected to the mechanical refrigeration unit. The air-conditioning unit of the utility model can selectively open different working modes according to different outdoor weather conditions to meet the requirements of various indoor environments and save energy consumption at the same time.

Description

Air Conditioning Unit Based on the Combination of Evaporative Cooling and Mechanical Refrigeration

technical field

The utility model belongs to the technical field of air-conditioning equipment, in particular to an air-conditioning unit based on the combination of evaporative cooling and mechanical refrigeration.

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 indoor temperature and humidity requirements, such as textile factories, production workshops, data centers, etc. Installing traditional mechanical refrigeration in these areas consumes a lot of power, and the operation and maintenance costs are high; in extreme weather in summer, the outdoor air temperature is too high, which will lead to poor heat dissipation of the condenser, which will cause the compressor to turn on the overheating protection and stop cooling the room . Under the call of the national energy conservation and emission reduction policy, we need a new type of air conditioner with low energy consumption or even zero energy consumption 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 interior 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 and heat dissipation. "Air energy", through direct or indirect contact between air and water, to produce cold wind 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, due to the influence of outdoor weather conditions, the cooling performance of the unit is unstable.

Utility model content

The purpose of this utility model is to provide an air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration, which can selectively open different working modes according to different outdoor weather conditions to meet the requirements of various indoor environments.

The technical solution adopted by the utility model is that the air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration includes a shell a, and the opposite side walls of the shell a are respectively provided with an air inlet and an air outlet, and the inside of the shell a is according to The primary air flow direction is provided with a coarse-effect filter, a direct-indirect evaporative cooling unit, a mechanical refrigeration unit, the first direct evaporative cooler and a centrifugal fan;

A condenser is also arranged in the direct-indirect evaporative cooling unit, and the condenser is connected with the mechanical refrigeration unit;

A water baffle is arranged between the first direct evaporative cooler and the centrifugal fan.

The utility model is also characterized in that,

The direct-indirect evaporative cooling unit includes a direct evaporative cooling unit and an indirect evaporative cooling unit communicated through the first air duct, and the direct evaporative cooling unit is arranged on the side close to the coarse-effect filter;

The direct evaporative cooling unit includes a shell b, a second direct evaporative cooler is arranged inside the shell b, an air valve is set on the side wall of the shell b facing the rough filter, and the shell b is far away from the rough filter An air outlet is provided on one side wall;

The indirect evaporative cooling unit includes a second air duct vertically arranged in the shell a, in which a horizontal tube olive tube type indirect evaporative cooler and a surface cooler are arranged in sequence from top to bottom, and the second air duct is The opposite side walls in the direction of air flow are respectively provided with a primary air inlet and a primary air outlet. Corresponding settings, the top of the corresponding shell a above the horizontal tube olive tube type indirect evaporative cooler is provided with a secondary air outlet, and a fan is installed in the secondary air outlet, and the condenser is located between the fan and the horizontal tube olive tube type indirect evaporative cooler Between them, a secondary air inlet is provided on the side wall of the second air passage corresponding to the bottom of the surface cooler, and the secondary air inlet is connected with the air outlet through the first air passage.

The second direct evaporative cooler includes a second water distributor, a second filler, and a second water tank arranged sequentially from top to bottom. The second water distributor is connected to the water outlet of the surface cooler through a second water pipe. The second water tank The third water pipe is connected to the water inlet of the surface cooler, and the third water pipe is also provided with a second water pump.

The first direct evaporative cooler includes the first water distributor, the first filler and the first water tank arranged in sequence from top to bottom, the first water distributor is connected to the first water tank through the first water pipe, and the first water pipe is also provided with First water pump.

The mechanical refrigeration unit includes an evaporator and a compressor connected through a pipeline G1, the evaporator is connected with a liquid outlet of the condenser through a pipeline G2, and the compressor is connected with a liquid inlet of the condenser through a pipeline G3.

A throttling valve is arranged on the pipeline G2.

The beneficial effects of the utility model are:

(1) The air-conditioning unit of the present utility model switches between the evaporative cooling mode and the evaporative condensation mode, which can maximize the use of dry air energy, save energy and high efficiency, and operate the evaporative cooling mode when the wet bulb temperature is low, so that only the first direct evaporation Cooler operation; at medium wet bulb temperature, operating evaporative cooling mode, enabling the direct-indirect evaporative cooling unit and the first direct evaporative cooler to operate; at high wet bulb temperature, operating evaporative cooling mode, enabling the indirect evaporative cooling unit Working with the mechanical refrigeration unit, the indirect evaporative cooling unit acts as the economizer of the mechanical refrigeration evaporator;

(2) In the air-conditioning unit of the present utility model, a horizontal tube olive tube type indirect evaporative cooler is used in the indirect evaporative cooling unit, and the secondary air cools the primary air in the dry passage in the tube, and the air flow of this horizontal tube olive tube type indirect evaporative cooler is The resistance is small, the energy consumption of the fan is reduced, the contact area between the primary air, the secondary air and the pipe wall is increased, and the heat exchange effect is enhanced. At the same time, the secondary fan of the indirect evaporative cooling unit adopts a frequency conversion axial flow fan. The opening degree of the valve can change the air volume ratio of secondary air and primary air in the wet channel, and control the dry and wet bulb temperature of the air outlet of the indirect evaporative cooling unit;

(3) In the air-conditioning unit of the present utility model, part of the primary air becomes secondary air after passing through the second direct evaporative cooler before the indirect evaporative cooling unit, and the water-soluble dirt of this part of the secondary air is cooled by the second direct evaporative cooling unit. The filling block of the horizontal tube olive tube type indirect evaporative cooler prevents scaling on the outer wall of the horizontal tube olive tube type indirect evaporative cooler and reduces the thermal resistance of dirt. The circulating water cooled by the second direct evaporative cooler, the secondary air first passes through the filler of the second direct evaporative cooler for isenthalpy cooling, and then goes through the surface cooler for further equational cooling to absorb the water in the horizontal tube olive tube type indirect evaporative cooler The heat of the primary air is discharged from the unit through the frequency conversion axial flow fan;

(4) In the air conditioner unit of the present utility model, when the mechanical refrigeration unit is turned on, the indirect evaporative cooling unit acts as an economizer of the evaporator in the mechanical refrigeration unit to pre-cool the primary air and increase the evaporation temperature, and the condenser is placed in the horizontal tube olive tube type indirect Above the evaporative cooler, the condenser is cooled by the exhaust air, which reduces the condensation temperature and reduces the energy consumption of the unit.

Description of drawings

Fig. 1 is the structural schematic diagram of the air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration of the present invention;

Fig. 2 is a schematic structural view of the core body of the horizontal tube olive tube type indirect evaporative cooler in the air-conditioning unit of the present invention.

In the figure, 1. Air inlet, 2. Coarse effect filter, 3. Air valve, 4. Second water distributor, 5. Second filler, 6. Second water tank, 7. Second water pump, 8. Fan, 9. Condenser, 10. Horizontal tube olive tube type indirect evaporative cooler, 11. Surface cooler, 12. Throttle valve, 13. Evaporator, 14. Compressor, 15. First water distributor, 16. Second 1 packing, 17. The first water tank, 18. The first water pump, 19. Water retaining plate, 20. Centrifugal fan, 21. Air outlet, 22. The first air duct, 23. Secondary air outlet, 24. The first water pipe , 25. The second water pipe, 26. The third water pipe, 27. The second air duct, 28. Air outlet, 29. Primary air inlet, 30. Primary air outlet, 31. Secondary air inlet.

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 an air-conditioning unit combining evaporative cooling and mechanical refrigeration. As shown in Figure 1, it includes a casing a, and an air inlet 1 and an air outlet 21 are respectively arranged on the opposite side walls of the casing a. According to the flow direction of the primary air, a coarse-effect filter 2, a direct-indirect evaporative cooling unit, a mechanical refrigeration unit, a first direct evaporative cooler and a centrifugal fan 20 are arranged in sequence;

A condenser 9 is also arranged in the direct-indirect evaporative cooling unit, and the condenser 9 is connected with the mechanical refrigeration unit, and the condenser 9 forms a closed circuit with the mechanical refrigeration unit through pipelines.

A water baffle 19 is provided between the first direct evaporative cooler and the centrifugal fan 20 .

The direct-indirect evaporative cooling unit includes a direct evaporative cooling unit and an indirect evaporative cooling unit communicated through the first air duct 22, and the direct evaporative cooling unit is arranged on the side close to the rough filter 2;

The direct evaporative cooling unit includes a shell b, a second direct evaporative cooler is arranged inside the shell b, a damper 3 is set on the side wall of the shell b facing the side of the rough effect filter 2, and the shell b is far away from the rough effect filter 2. An air outlet 28 is arranged on the side wall on one side of the filter 2;

The indirect evaporative cooling unit includes a second air duct 27 vertically arranged in the housing a, and the second air duct 27 is sequentially provided with a horizontal tube olive tube type indirect evaporative cooler 10 and a surface cooler 11 from top to bottom. The two air channels 27 are respectively provided with a primary air inlet 29 and a primary air outlet 30 on the opposite side walls of the primary air flow direction. The inlet end and the air outlet end of the primary air channel are arranged correspondingly, and the top of the corresponding shell a above the horizontal pipe olive tube type indirect evaporative cooler 10 is provided with a secondary air outlet 23, and a fan 8 is arranged inside the secondary air outlet 23 , the condenser 9 is located between the fan 8 and the horizontal tube olive tube type indirect evaporative cooler 10, and the side wall of the second air channel 27 corresponding to the surface cooler 11 is provided with a secondary air inlet 31, and the secondary air inlet 31 is connected to the The air outlet 28 communicates with the first air duct 22 .

As shown in FIG. 2 , the horizontal tube olive-tube type indirect evaporative cooler 10 includes a plurality of parallel olive-shaped heat exchange tubes arranged horizontally.

The second direct evaporative cooler includes a second water distributor 4, a second filler 5, and a second water tank 6 arranged in sequence from top to bottom, and the second water distributor 4 passes through the second water pipe 25 and the outlet of the surface cooler 11. The water port is connected, and the second water tank 6 is connected with the water inlet of the surface cooler 11 through the third water pipe 26, and the second water pump 7 is also arranged on the third water pipe 26.

The first direct evaporative cooler includes a first water distributor 15, a first filler 16, and a first water tank 17 arranged in sequence from top to bottom. The first water distributor 15 is connected to the first water tank 17 through a first water pipe 24. A water pipe 24 is also provided with a first water pump 18 .

The mechanical refrigeration unit includes an evaporator 13 and a compressor 14 connected through a pipeline G1, the evaporator 13 is connected with the liquid outlet of the condenser 9 through a pipeline G2, and the compressor 14 is connected with the liquid inlet of the condenser 9 through a pipeline G3.

A throttling valve 12 is arranged on the pipeline G2.

The working mode and air flow of the utility model air-conditioning unit are as follows:

(1) When the wet bulb temperature is low, run the evaporative cooling mode:

Close the air valve 3, the second water distributor 4 and the second water pump 7, stop the second direct evaporative cooler; close the fan 8, compressor 14 and throttle valve 12, stop the indirect evaporative cooling unit and the mechanical refrigeration unit; Turn on the first water distributor 15, turn on the first water pump 18, turn on the centrifugal fan 20, and only make the first direct evaporative cooler work.

(2) At moderate wet bulb temperature, run evaporative cooling mode:

Stop the work of the mechanical refrigeration unit, open the air valve 3, open the second water distributor 4 and the first water distributor 15, open the second water pump 7 and the first water pump 18, open the fan 8, and open the centrifugal fan 20, so that the direct-indirect The evaporative cooling unit and the first direct evaporative cooler operate.

(3) When the wet bulb temperature is high, run the evaporative condensation mode:

Open the air valve 3, open the second water distributor 4, open the second water pump 7, make the direct evaporative cooling unit work, open the fan 8, compressor 14 and throttle valve 12, make the indirect evaporative cooling unit and the mechanical refrigeration unit work, Turn on the centrifugal fan 20; turn off the first water distributor 15, turn off the first water pump 18, and make the first direct evaporative cooler stop working.

(4) Air flow:

The primary air enters from the air inlet 1, passes through the second packing 5, the tube of the horizontal tube olive tube type indirect evaporative cooler 10, the surface cooler 13, the first packing 16 and the water baffle 19, and then is blown out by the centrifugal fan 20 from the air outlet. 21 sent indoors.

The secondary air comes from part of the primary air after isenthalpic cooling by the second filler 5, passes through the tube outer wall of the horizontal tube olive tube type indirect evaporative cooler 10 and the condenser 9, and is discharged to the environment by the fan 8 through the secondary air outlet 23.

The air-conditioning unit of the utility model can make full use of the dry air to cool the air to reduce the sensible cooling capacity of the mechanical refrigeration system, thereby reducing energy consumption, and can selectively operate the indirect evaporative cooling unit and the indirect evaporative cooling unit according to the outdoor meteorological conditions in transition season The direct evaporative cooling unit is a low-carbon, environmentally friendly, economical and healthy evaporative cooling air-conditioning technology.

Claims (6)

1. The air-conditioning unit based on the combination of evaporative cooling and mechanical refrigeration is characterized in that it includes a housing a, and the opposite side walls of the housing a are respectively provided with an air inlet (1) and an air outlet (21), so A rough filter (2), a direct-indirect evaporative cooling unit, a mechanical refrigeration unit, a first direct evaporative cooler and a centrifugal fan (20) are sequentially arranged in the casing a according to the primary air flow direction; A condenser (9) is also arranged in the direct-indirect evaporative cooling unit, and the condenser (9) is connected with a mechanical refrigeration unit; A water baffle (19) is arranged between the first direct evaporative cooler and the centrifugal fan (20). 2. The air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration according to claim 1, wherein the direct-indirect evaporative cooling unit includes a direct evaporative cooling unit communicated with the first air duct (22) and An indirect evaporative cooling unit, the direct evaporative cooling unit is arranged on a side close to the rough filter (2); The direct evaporative cooling unit includes a shell b, a second direct evaporative cooler is arranged inside the shell b, and a damper is set on the side wall of the shell b facing the rough filter (2) (3), the housing b is provided with an air outlet (28) on the side wall away from the coarse filter (2); The indirect evaporative cooling unit includes a second air duct (27) vertically arranged in the casing a, and horizontal tube olive tube type indirect evaporative coolers are sequentially arranged in the second air duct (27) from top to bottom (10) and the surface cooler (11), the second air duct (27) is respectively provided with a primary air inlet (29) and a primary air outlet (30) on the opposite side walls in the primary air flow direction, so The primary air inlet (29) and the primary air outlet (30) are respectively arranged correspondingly to the inlet and outlet ends of the primary air channel of the horizontal tube olive tube type indirect evaporative cooler (10), and the horizontal tube olive A secondary air outlet (23) is provided on the top of the corresponding shell a above the tubular indirect evaporative cooler (10), and a fan (8) is arranged in the secondary air outlet (23), and the condenser (9) Located between the blower fan (8) and the horizontal tube olive tube type indirect evaporative cooler (10), a secondary air inlet (31 ), the secondary air inlet (31) communicates with the air outlet (28) through the first air channel (22). 3. The air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration according to claim 2, characterized in that, the second direct evaporative cooler includes a second water distributor (4) arranged sequentially from top to bottom , the second filler (5) and the second water tank (6), the second water distributor (4) is connected with the water outlet of the surface cooler (11) by the second water pipe (25), the second water tank ( 6) Connect with the water inlet of the surface cooler (11) through the third water pipe (26), and the second water pump (7) is also arranged on the third water pipe (26). 4. The air-conditioning unit based on the combination of evaporative cooling and mechanical refrigeration according to claim 1, characterized in that, the first direct evaporative cooler comprises a first water distributor (15) arranged in sequence from top to bottom, The first filler (16) and the first water tank (17), the first water distributor (15) is connected with the first water tank (17) through the first water pipe (24), and the first water pipe (24) is also connected to the first water tank (17). A first water pump (18) is provided. 5. The air conditioning unit based on the combination of evaporative cooling and mechanical refrigeration according to claim 1, characterized in that, the mechanical refrigeration unit includes an evaporator (13) and a compressor (14) connected by a pipeline G1, the The evaporator (13) is connected to the liquid outlet of the condenser (9) through a pipeline G2, and the compressor (14) is connected to the liquid inlet of the condenser (9) through a pipeline G3. 6. The air-conditioning unit based on the combination of evaporative cooling and mechanical refrigeration according to claim 5, characterized in that a throttling valve (12) is arranged on the pipeline G2.