CN211345637U - A combined air conditioner unit combining evaporative cooling and mechanical refrigeration - Google Patents

Abstract

The utility model discloses a combination formula air conditioning unit that evaporative cooling and mechanical refrigeration combine, including the unit casing, be provided with fresh air inlet and supply-air outlet on the corresponding both sides wall of unit casing respectively, the unit casing is inside to have set gradually direct evaporative cooling unit according to the new trend direction of flow, the condenser, air cleaner, indirect evaporative cooling unit, evaporimeter and forced draught blower, the condenser below still is provided with the compressor, condenser and evaporimeter connect gradually and form closed circulation circuit, still be provided with the air intake on the unit casing lateral wall between air cleaner and the condenser. The utility model discloses a combination formula air conditioning unit that evaporative cooling and mechanical refrigeration combine utilizes the effectual reduction of evaporative cooling technique to use traditional mechanical refrigeration's energy consumption, reaches to satisfy indoor travelling comfort requirement with lower energy consumption, and is energy-concerving and environment-protective.

Description

A combined air conditioner unit combining evaporative cooling and mechanical refrigeration

technical field

The utility model belongs to the technical field of air conditioning equipment, and relates to a combined air conditioning unit combining evaporative cooling and mechanical refrigeration.

Background technique

Evaporative cooling is a cooling method that uses dry air to exchange heat and moisture between air and water to obtain cooling capacity. With the continuous innovation and development of evaporative cooling technology, evaporative cooling technology plays a pivotal role in various fields in my country. However, evaporative cooling units are greatly affected by outdoor weather conditions, and are more suitable for dry climate areas such as northwest my country, but it is more difficult to apply in humid climate areas such as southern China.

Traditional mechanical refrigeration has good stability and will not be affected by meteorological conditions. However, due to its high energy consumption, high initial investment and operating costs, and refrigerants have a greater impact on the environment, under the general trend of the national energy conservation and emission reduction era , is facing transformation and upgrading.

Utility model content

The purpose of the utility model is to provide a combined air conditioner unit combining evaporative cooling and mechanical refrigeration, which can effectively reduce the energy consumption of using traditional mechanical refrigeration by using evaporative cooling technology, achieve indoor comfort requirements with lower energy consumption, and save energy and protect the environment. .

The technical scheme adopted by the utility model is that a combined air conditioning unit combining evaporative cooling and mechanical refrigeration includes a unit casing, and two side walls corresponding to the unit casing are respectively provided with fresh air outlets and air supply outlets. The inside of the body is provided with a direct evaporative cooling unit, a condenser, an air filter, an indirect evaporative cooling unit, an evaporator and a blower according to the flow direction of the fresh air. A compressor is also arranged below the condenser. The compressor, condenser and evaporator are connected in sequence A closed circulation loop is formed, and an air inlet is also arranged on the side wall of the unit casing between the air filter and the condenser.

The utility model is also characterized in that,

A throttle valve is also connected between the condenser and the evaporator.

The direct evaporative cooling unit includes fillers. Above the fillers are arranged a water distribution device a, a water baffle a, an exhaust fan and an air outlet in order from bottom to top. Below the fillers are provided a water storage tank a, a water distribution device a and a water storage tank. a is connected through a water supply pipe a, and a circulating water pump a is also connected to the water supply pipe a.

The water storage tank a is also connected with a drain pipe and a water supply pipe, and a floating ball valve a is also installed at the position where the water supply pipe extends into the water storage tank a.

The water supply pipe a is also provided with a valve a.

The packing is slanted towards the condenser.

The indirect evaporative cooling unit includes a plate-and-tube heat exchanger. Above the plate-and-tube heat exchanger, a water distribution device b, a water baffle b, a secondary exhaust fan and a secondary air outlet are sequentially arranged from bottom to top. A water storage tank b is arranged below the heat exchanger. The water distribution device b and the water storage tank b are connected by a water supply pipe b. The water supply pipe b is also connected with a circulating water pump b. A secondary air inlet is also provided on the corresponding side wall of the unit casing.

A valve b is also provided on the water supply pipe b.

The water storage tank b is also connected with a drain pipe and a water supply pipe, and a floating ball valve b is also installed at the position where the water supply pipe extends into the water storage tank b.

The outside of the plate and tube of the plate-and-tube heat exchanger is attached with a water-absorbing fiber material.

The beneficial effects of the present utility model are:

(1) The utility model combines evaporative cooling and mechanical refrigeration, opens different functional sections according to outdoor weather changes, makes full use of outdoor natural cold sources to cool the room, greatly reduces the installed capacity and startup time of mechanical refrigeration, reduces system cost, and saves Operating energy consumption, while meeting the requirements of indoor comfort.

(2) The indirect evaporative cooling unit of the present invention uses a plate-and-tube heat exchanger, which is more conducive to the adhesion of the water film outside the tube compared with the traditional tube heat exchanger, and the heat exchange effect is better.

(3) The condenser of the mechanical refrigeration system adopts an evaporative condenser, and a water-sprayed packing is arranged at the inlet of the fresh air outlet. The outdoor fresh air is first cooled by isoenthalpy with the packing layer, and then exchanges heat with the condenser to reduce the condensation temperature. Therefore, the refrigeration capacity of the compressor is increased, the power consumption is reduced, and the packing is placed in an inclined manner, which increases the contact area and contact time between the treated air and the windward surface of the packing, and improves the heat exchange efficiency.

(4) When mechanical refrigeration needs to be turned on in hot summer, the direct cooling unit and indirect evaporative cooling unit first pre-cool the return air and fresh air, and then cool down the evaporator, effectively reducing the configuration ratio of mechanical refrigeration and the cooling of the system quantity.

Description of drawings

Fig. 1 is the structural representation of a kind of combined evaporative cooling and mechanical refrigeration of the present utility model combined air-conditioning unit;

2 is a schematic structural diagram of an indirect evaporative cooling unit in a combined evaporative cooling and mechanical refrigeration unit of the present invention;

3 is a schematic diagram of the air flow of the indirect evaporative cooling unit in a combined air conditioner unit of the present invention, which combines evaporative cooling and mechanical refrigeration.

In the figure, 1. Compressor, 2. Condenser, 3. Throttle valve, 4. Evaporator, 5. Water storage tank a, 6. Circulating water pump a, 7. Drain pipe, 8. Water supply pipe, 9. Float Ball valve a, 10. Valve a, 11. Water supply pipe a, 12. Fresh air outlet, 13. Water baffle a, 14. Exhaust fan, 15. Air exhaust port, 16. Water distribution device a, 17. Packing, 18. Air inlet, 19. Air filter, 20. Secondary air outlet, 21. Secondary exhaust fan, 22. Float valve b, 23. Water storage tank b, 24. Circulating water pump b, 25. Secondary air inlet , 26. Plate and tube heat exchanger, 27. Water distribution device b, 28. Valve b, 29. Water supply pipe b, 30. Water baffle b, 31. Blower, 32. Air outlet.

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 combined air conditioner unit combining evaporative cooling and mechanical refrigeration, the structure of which is shown in Figure 1, and includes a unit casing. The two side walls corresponding to the unit casing are respectively provided with a fresh air outlet 12 and an air supply outlet 32. , the inside of the unit shell is sequentially provided with a direct evaporative cooling unit, a condenser 2, an air filter 19, an indirect evaporative cooling unit, an evaporator 4 and a blower 31 according to the flow direction of the fresh air. The machine 1 , the condenser 2 and the evaporator 4 are connected in sequence to form a closed circulation loop, and an air inlet 18 is also provided on the side wall of the unit casing between the air filter 19 and the condenser 2 .

A throttle valve 3 is also connected between the condenser 2 and the evaporator 4, and the compressor 1, the condenser 2, the evaporator 4 and the throttle valve 3 together form a mechanical refrigeration unit.

The direct evaporative cooling unit includes a filler 17. Above the filler 17, a water distribution device a16, a water baffle a13, an exhaust fan 14 and an air outlet 15 are sequentially arranged from bottom to top, and a water storage tank a5 is arranged below the filler 17. a16 and the water storage tank a5 are connected by a water supply pipe a11, and a circulating water pump a6 is also connected to the water supply pipe a11.

The water storage tank a5 is also connected with a drain pipe 7 and a water supply pipe 8, and a floating ball valve a9 is also installed at the position where the water supply pipe 8 extends into the water storage tank a5.

The water supply pipe a11 is also provided with a valve a10.

The packing 17 is inclined in the direction of the condenser 2 .

As shown in FIG. 2 , the indirect evaporative cooling unit includes a plate-and-tube heat exchanger 26. Above the plate-and-tube heat exchanger 26, from bottom to top, a water distribution device b27, a water baffle b30, a secondary exhaust fan 21 and The secondary air outlet 20, a water storage tank b23 is arranged below the plate and tube heat exchanger 26, the water distribution device b27 and the water storage tank b23 are connected by a water supply pipe b29, and a circulating water pump b24 is also connected to the water supply pipe b29. A secondary air inlet 25 is also provided on the side wall of the unit casing corresponding between the type heat exchanger 26 and the water storage tank b23.

A valve b28 is also provided on the water supply pipe b29.

The water storage tank b23 is also connected with a drain pipe 7 and a water supply pipe 8, and a floating ball valve b22 is also installed at the position where the water supply pipe 8 extends into the water storage tank b23.

The outside of the plate and tube of the plate-and-tube heat exchanger 26 is attached with a water-absorbing fiber material, which increases the heat exchange area and heat exchange time, and enhances the effect of evaporative cooling.

The indirect evaporative cooling unit of the present invention, as shown in Figure 3, adopts countercurrent heat exchange, the temperature of the surface water of the upper heat exchange tube bundle is lower than the surface temperature of the lower heat exchange tube bundle, and the outdoor air circulates from the bottom to the top, and the air temperature of the lower layer is higher than that of the upper layer. When the air temperature is low, when the air exchanges heat with water, it always maintains a large temperature difference, which is more conducive to heat exchange. Secondly, the air flows from bottom to top, which can effectively reduce the falling speed of water droplets and make the liquid film on the surface of the tube heat pipe bundle stay. Time increases, effectively increasing the heat exchange efficiency.

The working principle of the combined air conditioner unit of the present utility model is as follows:

(1) Winter operating mode

The direct evaporative cooling unit and the mechanical refrigeration unit do not work, only the indirect evaporative cooling unit is opened and the valve b28 and the circulating water pump b24 are closed, the water distribution device b27 does not work, the outdoor fresh air enters the unit shell through the fresh air outlet 12, and is filtered by the filler 17. The indoor return air entering the unit casing from the air inlet 18 is mixed, filtered by the air filter 19, and then enters the plate tube of the plate-and-tube heat exchanger 26, and the secondary air enters the unit casing through the secondary air inlet 25. The inside passes over the outer wall of the plate tube, the mixed air in the plate tube exchanges heat with the secondary air outside the plate tube, and then is sent into the room through the air supply port 30 through the blower 31, and the secondary air that has absorbed the heat passes through the secondary exhaust fan 21. The secondary air outlet 20 is discharged.

(2) Transition season operation mode

The direct evaporative cooling unit and the mechanical refrigeration unit do not work, the indirect evaporative cooling unit is turned on, the valve b28 and the circulating water pump b24 are turned on, and the circulating water pump b24 transports the water in the water storage tank b23 to the water distribution device b27 through the water supply pipe b29, and the water distribution device b27 Spray the plate and tube heat exchanger;

The secondary air enters the inside of the unit casing through the secondary air inlet 25, and the secondary air vertically swipes the outer wall of the plate tube from bottom to top, and exchanges heat and moisture with the water film outside the plate tube. At the same time, the outdoor fresh air enters through the fresh air outlet 12. The unit casing is filtered by the filler 17 and mixed with the indoor return air entering the unit casing through the air inlet 18, then filtered by the air filter 19, and then passed through the plate tube of the plate-and-tube heat exchanger 26, passing through the tube wall and water. The membrane transfers heat to the secondary air, and after the temperature is lowered, the air blower 31 is sent into the room through the air supply port 30 , and the secondary air that has absorbed the heat is discharged through the secondary air outlet 20 through the secondary exhaust fan 21 .

(3) Summer operation mode

The direct evaporative cooling unit, mechanical refrigeration unit and indirect evaporative cooling unit are all turned on;

The working principle of the water system of the direct evaporative cooling unit: the circulating water pump a6 supplies the circulating water in the water storage tank a5 to the water distribution device a16 through the water supply pipe a, and the water distribution device a16 sprays the filler 17;

The working principle of the water system of the indirect evaporative cooling unit: the circulating water pump b24 transports the water in the water storage tank b23 through the water supply pipe b29 to the water distribution device b27, and the water distribution device b27 sprays the plate-and-tube heat exchanger;

The outdoor fresh air enters the unit casing through the fresh air outlet 12, and then passes through the filler 17 for preliminary cooling and filtering, and then exchanges heat with the condenser to reduce the condensing temperature. At the same time, the indoor return air enters the unit casing through the air inlet 18. The outdoor fresh air is merged, and then filtered by the air filter 19, and enters the plate tube of the plate and tube heat exchanger. The secondary air enters the inside of the unit shell through the secondary air inlet 25, and the secondary air is swept vertically from bottom to top. It passes through the outer wall of the plate tube and exchanges heat and moisture with the water film outside the plate tube. The mixed air in the plate tube transfers heat to the secondary air outside the plate tube through the tube wall and the water film for secondary cooling, and then passes through the evaporator 4. After cooling, the fan 31 is sent into the room through the air outlet 30 , and the secondary air that has absorbed the heat is discharged through the secondary air outlet 20 through the secondary exhaust fan 21 .

The present invention only needs to turn on mechanical refrigeration during high temperature weather in summer. At this time, the direct evaporative cooling unit and the indirect evaporative cooling unit are used as air pre-coolers to pre-cool outdoor fresh air and indoor return air, and indirect evaporative cooling is used in transitional seasons and winters for natural Cooling greatly reduces the installed capacity and startup time of mechanical refrigeration, reduces system cost, saves operating energy consumption, and improves system efficiency.

Claims (10)

1. A combined air-conditioning unit combined with evaporative cooling and mechanical refrigeration, is characterized in that, comprises a unit casing, and the corresponding two side walls of the unit casing are respectively provided with a fresh air outlet (12) and an air outlet (32 ), a direct evaporative cooling unit, a condenser (2), an air filter (19), an indirect evaporative cooling unit, an evaporator (4) and a blower (31) are sequentially arranged in the casing of the unit according to the flow direction of the fresh air. A compressor (1) is also arranged below the condenser (2), and the compressor (1), the condenser (2) and the evaporator (4) are connected in sequence to form a closed circulation loop, and the air filter (19) An air inlet (18) is also arranged on the side wall of the unit casing between the condenser (2). 2 . The combined air conditioner unit according to claim 1 , wherein a throttle valve ( 3 ) is further connected between the condenser ( 2 ) and the evaporator ( 4 ). 3 . 3. The combined air-conditioning unit according to claim 1, wherein the direct evaporative cooling unit comprises a filler (17), and a water distribution device a (16) is sequentially arranged above the filler (17) from bottom to top ), a water baffle a (13), an exhaust fan (14) and an air outlet (15), a water storage tank a (5) is arranged below the filler (17), the water distribution device a (16) and The water storage tank a(5) is connected by a water supply pipe a(11), and the water supply pipe a(11) is also connected with a circulating water pump a(6). 4. The combined air conditioner unit according to claim 3, characterized in that, a drain pipe (7) and a water supplement pipe (8) are also connected to the water storage tank a (5), and the water supplement pipe (8) A float valve a(9) is also installed at the position protruding into the water storage tank a(5). 5. The combined air conditioner unit according to claim 3, characterized in that, a valve a (10) is further provided on the water supply pipe a (11). 6. The combined air conditioner unit according to claim 3, characterized in that, the packing (17) is inclined in the direction of the condenser (2). 7. The combined air conditioning unit according to any one of claims 1-3, wherein the indirect evaporative cooling unit comprises a plate-and-tube heat exchanger (26), and the plate-and-tube heat exchanger (26) ) is provided with a water distribution device b (27), a water baffle b (30), a secondary exhaust fan (21) and a secondary exhaust port (20) in order from bottom to top. The plate-and-tube heat exchanger (26) A water storage tank b (23) is provided below, and the water distribution device b (27) and the water storage tank b (23) are connected through a water supply pipe b (29), which is also connected to the water supply pipe b (29). A circulating water pump b (24) is connected, and a secondary air inlet (25) is also provided on the side wall of the unit casing corresponding between the plate-and-tube heat exchanger (26) and the water storage tank b (23). 8 . The combined air conditioner unit according to claim 7 , wherein a valve b ( 28 ) is further provided on the water supply pipe b ( 29 ). 9 . 9 . The combined air conditioner unit according to claim 7 , wherein the water storage tank b ( 23 ) is further connected with a drain pipe ( 7 ) and a water supplement pipe ( 8 ), and the water supplement pipe ( 8 ) A float valve b(22) is also installed at the position protruding into the water storage tank b(23). 10. The combined air-conditioning unit according to claim 7, characterized in that, a water-absorbing fiber material is attached to the outside of the plate and tube of the plate-and-tube heat exchanger (26).

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