CN110186127A - A kind of band-tube type indirect evaporating-cooling cooperates with coupling water cooler with evaporative condenser - Google Patents

Abstract

A plate-and-tube type indirect evaporative cooling and evaporative condensation cooperatively coupled chiller disclosed by the present invention includes a shell, and a packed tower unit is arranged in the middle of the shell. The left and right sides of the packed tower unit have symmetrical and identical structures, including According to the air flow direction, the housing inside the air inlet is provided with an air filter, an evaporative cooling unit, a water baffle a, a direct expansion refrigeration unit, an exhaust fan a and an air outlet a in sequence. The cooperative coupling chiller of the present invention combines evaporative cooling with direct expansion refrigeration to effectively improve the efficiency of indirect evaporative cooling, thereby obtaining cold water with a lower temperature; the lower temperature secondary exhaust air is used to reduce the condensation temperature and pressure, and improve the energy efficiency of the system; The cold water in the cooling section and the mechanical refrigeration section can be flexibly configured, which broadens the temperature range of the outlet water and saves energy and is highly efficient.

Description

A plate-tube indirect evaporative cooling and evaporative condensation cooperatively coupled chiller

technical field

The invention belongs to the technical field of air-conditioning equipment, and in particular relates to a plate-tube type indirect evaporative cooling and evaporative condensation cooperative coupling chiller.

Background technique

With the development of social economy, the energy consumption of air-conditioning systems has increased significantly, especially the energy consumption for preparing cold water remains high. When the traditional direct expansion refrigeration air conditioner has extreme temperatures in summer, due to the high outdoor ambient temperature, the condenser does not dissipate heat smoothly, the compressor is overheated and protected, and even causes a failure to shut down. Evaporative cooling technology uses water as the medium to produce cold air or cold water through direct or indirect contact between air and water; evaporative cooling chillers are easily affected by outdoor weather conditions, and the outlet water temperature is unstable. However, the energy efficiency of traditional mechanical refrigeration chillers is low, and it is difficult to adjust the outlet water temperature when needed, and it is difficult to adapt to local conditions.

Contents of the invention

The purpose of the present invention is to provide a plate-and-tube type indirect evaporative cooling and evaporative condensation cooperative coupling chiller, which solves the problems of large energy consumption, poor heat dissipation of the radiator, and difficulty in adjusting the outlet water temperature of the existing air conditioning unit when cooling water with vegetation.

The technical solution adopted in the present invention is a plate-and-tube type indirect evaporative cooling and evaporative condensation cooperative coupling chiller, including a shell, a packed tower unit is arranged in the middle of the shell, and the structures on the left and right sides of the packed tower unit are symmetrical and identical. It includes an air inlet arranged on the side wall, and the shell inside the air inlet is provided with an air filter, an evaporative cooling unit, a water baffle a, a direct expansion refrigeration unit, an exhaust fan a and an air outlet a in sequence according to the direction of air flow.

The present invention is also characterized in that,

The evaporative cooling unit includes a plate and tube indirect evaporative cooler, the bottom of the plate and tube indirect evaporative cooler is provided with a cold water tank, and the top of the plate and tube indirect evaporative cooler is provided with filler a and water distributor a in sequence from bottom to top;

The water distributor a and the cold water tank are connected through a water supply pipe;

The shell corresponding to the bottom end of the plate-tube indirect evaporative cooler is provided with a secondary air inlet.

An electronic water treatment instrument and a water pump are also arranged in sequence on the water supply pipe.

The cold water tank is located at the bottom of the housing and is also provided with a water supply port a.

Filler a adopts GLASdek inorganic filler.

The plate and tube indirect evaporative cooler adopts a horizontal plate and tube indirect evaporative cooler.

The direct expansion refrigeration unit includes a condenser located on the top of the water baffle a, and the condenser is sequentially connected to the compressor, the shell-and-tube evaporator and the thermal expansion valve through copper tubes to form a closed pipeline;

A shell and tube evaporator consists of several evaporator refrigerant coils arranged in a continuous "S" shape.

The condenser is provided with a refrigerant outlet and a refrigerant inlet, the refrigerant outlet is connected to the compressor through the copper tube G2, the compressor is connected to the evaporator refrigerant coil through the copper tube G1, and the evaporator refrigerant coil is connected to thermal expansion through the copper tube G4 The thermostatic expansion valve is connected to the refrigerant inlet through the copper pipe G3.

The packed tower unit includes packing d, packing c, packing b, water distributor b, water baffle b, exhaust fan b and air outlet b arranged sequentially from bottom to top.

The section of filler d is an inverted triangle.

The beneficial effects of the present invention are:

(1) The collaborative coupling chiller of the present invention organically combines plate-tube indirect + direct evaporative cooling with direct expansion refrigeration to form an integrated dual-cooling source chiller, which is compact in structure, saves space, and can be flexibly configured with two types of cold water during use Proportion, energy saving and high efficiency;

(2) The collaborative coupling chiller of the present invention, wherein the circulating water of the plate-and-tube indirect evaporative cooler adopts the cold water produced by the unit body, which reduces the temperature of the spray water in the wet channel and effectively improves the indirect evaporative cooling efficiency;

(3) The collaborative coupling chiller of the present invention prolongs the contact time of the air and water in the wet channel through the filler a, makes the water distribution effect more uniform, further reduces the temperature of the circulating water in the wet channel, improves the efficiency of indirect evaporative cooling, and makes the water entering the packed tower unit The temperature of the wet bulb of the air is reduced, so that cold water with a lower temperature can be obtained;

(4) The cooperative coupling chiller of the present invention, by setting the condenser above the filler a, utilizes the secondary exhaust air at a lower temperature to dissipate heat, reduce the condensation temperature and pressure, and improve the energy efficiency of the system;

(5) The collaborative coupled chiller unit of the present invention reduces the air resistance of the packed tower unit by arranging the packing of the packed tower unit in layers, and optimizes the distribution of the spray water, which is beneficial to reduce the temperature of the spray water.

Description of drawings

Figure 1 is a structural schematic diagram of a plate-and-tube indirect evaporative cooling and evaporative condensation cooperatively coupled chiller of the present invention;

Fig. 2 is a structural schematic diagram of a direct expansion refrigeration unit in a cooperative coupling chiller of the present invention;

Fig. 3 is a left view of the cooperative coupling chiller of the present invention;

Fig. 4 is a top view of the coordinated coupling chiller of the present invention.

In the figure, 1. Air inlet, 2. Air filter, 3. Electronic water treatment instrument, 4. Water pump, 5. Secondary air inlet, 6. Cold water tank, 7. Water supply port a, 8. Plate-tube type indirect Evaporative cooler, 9. Filler a, 10. Water distributor a, 11. Water baffle a, 12. Condenser, 13. Exhaust fan a, 14. Air outlet a, 15. Water return a, 16. Exhaust Fan b, 17. Air outlet b, 18. Water baffle b, 19. Water distributor b, 20. Packing b, 21. Packing c, 22. Packing d, 23. Compressor, 24. Thermal expansion valve, 25. Evaporator refrigerant coil, 26. Water supply port b, 27. Refrigerant outlet, 28. Refrigerant inlet, 29. Water supply port c, 30. Water return port b, 31. Shell and tube evaporator, 32. Shell , 33. Water supply pipe.

Detailed ways

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

A plate-and-tube type indirect evaporative cooling and evaporative condensation cooperative coupling chiller of the present invention, as shown in Figure 1, includes a shell 32, a packed tower unit is arranged in the middle of the shell 32, and the structures on the left and right sides of the packed tower unit are symmetrical and identical , to ensure that the chiller can take in air from both sides, including the air inlet 1 arranged on the side wall, and the housing 32 in the air inlet 1 is sequentially provided with an air filter 2, an evaporative cooling unit, a water baffle a11, and a direct Expansion refrigeration unit, exhaust fan a13 and exhaust outlet a14.

Wherein the air filter 2 adopts a coarse-effect plate air filter.

The evaporative cooling unit includes a plate and tube indirect evaporative cooler 8, the bottom of the plate and tube indirect evaporative cooler 8 is provided with a cold water tank 6, and the top of the plate and tube indirect evaporative cooler 8 is sequentially provided with filler a9 and water distribution The water distributor a10 is connected to the cold water tank 6 through the water supply pipe 33; the shell 32 corresponding to the bottom end of the plate-tube type indirect evaporative cooler 8 is provided with a secondary air inlet 5. Also be provided with electronic water treatment instrument 3 and water pump 4 successively on the water supply pipe 33.

The top of the plate-tube indirect evaporative cooler 8 is provided with filler a9, which not only prolongs the contact time between the air and water in the wet channel, but also makes the water distribution effect more uniform.

The cold water tank 6 is arranged on the bottom of the casing 32 and is provided with a water supply port a7.

Filler a9 adopts GLASdek inorganic filler; water distributor a10 adopts drip type water distributor; secondary air inlet 5 adopts grille inlet;

The plate-tube indirect evaporative cooler 8 adopts a plate-tube indirect evaporative cooler.

As shown in Figure 2, the direct expansion refrigeration unit includes a condenser 12 located on the top of the water baffle a11, and the condenser 12 is connected to the compressor 23, the shell-and-tube evaporator 31 and the thermal expansion valve 24 in sequence through copper pipes to form a closed pipeline The shell-and-tube evaporator 31 includes several evaporator refrigerant coils 25 arranged in a continuous "S" shape.

The condenser 12 is provided with a refrigerant outlet 27 and a refrigerant inlet 28, the refrigerant outlet 27 is connected to the compressor 23 through the copper pipe G2, the compressor 23 is connected to the evaporator refrigerant coil 25 through the copper pipe G1, and the evaporator refrigerant coil 25 The thermal expansion valve 24 is connected through the copper pipe G4, and the thermal expansion valve 24 is connected with the refrigerant inlet 28 through the copper pipe G3.

The condenser 12 is arranged above the filler a9, and the lower-temperature secondary exhaust air is used to dissipate heat and reduce the condensation temperature and pressure.

The packed tower unit includes packing d22, packing c21, packing b20, water distributor b19, water baffle b18, exhaust fan b16 and air outlet b17 arranged sequentially from bottom to top. The packing of the packed tower unit is arranged in layers, which improves the utilization rate of energy.

The section of filler d22 is an inverted triangle, which increases the contact area between air and filler, can cool more volume of air, and improves heat exchange efficiency.

The water distributor b19 is provided with a water return port a15, and the shell and tube evaporator 31 is provided with a water supply port b26 and a water return port b30. Two parts of the return water at the end of the room flow back into the chiller, and part of it enters the water distributor b19 through the water return port a15 , the other part enters the shell-and-tube evaporator 31 through the water return port b30, as shown in Figure 3, the water supply port a7 and the water supply port b26 are connected to the outside of the shell 32 through PVC pipes, and after mixing, they are supplied to the room through the water supply port c29 end.

As shown in FIG. 4 , which is a top view of the present invention, the exhaust fan a13 and the air exhaust port a14 are symmetrically distributed on both sides of the air exhaust port b17 .

The working process of the cooperatively coupled chiller of the present invention is as follows:

a Evaporative cooling water production mode

Turn off the direct expansion refrigeration unit and turn on the evaporative cooling unit and packed column unit. The outdoor fresh air enters through the air inlet 1, and after the impurities are removed by the air filter 2, it is wet-cooled in the plate-and-tube indirect evaporative cooler 8. This process can reduce the air entering the packed tower unit packing b20, packing c21, and packing d22. Air wet bulb temperature. The fresh air after cooling enters the unit filler b20, filler c21, and filler d22 of the packed tower, and the indoor end return water enters the water distributor b19 through the return water port a15 for spraying, and the spray water is directly connected with the air entering the filler b20, filler c21, and filler d22. Contact, heat and moisture exchange occurs, and the temperature of the return water at the end drops into the cold water tank 6 after the temperature is lowered. The temperature of the cold water produced in this process is lower than the wet bulb temperature of the outdoor air. The cold water produced is supplied to the end of the room through the water supply port a7, and the fresh air is discharged from the air discharge port b17 under the action of the exhaust fan b16.

b joint water production mode of evaporative cooling and direct expansion refrigeration unit

In extreme conditions, evaporative cooling, packed column units and direct expansion refrigeration units are turned on simultaneously. A part of the indoor terminal return water returns to the evaporative cooling unit through the return water port a15, and another part of the indoor terminal return water enters the shell-and-tube evaporator 31 through the return water port b30, and the liquid refrigerant in the refrigerant coil 25 of the evaporator absorbs the shell-and-tube evaporation The heat of return water in the device 31 is vaporized. At this time, the temperature of the return water at the end is lowered to produce low-temperature cold water. The gaseous refrigerant contains absorbed heat, is sucked into the compressor 23 through the copper pipe G1, and is compressed into a high-temperature and high-pressure gas, and the exhaust gas of the compressor 23 enters the condenser 12 through the copper pipe G2. At the same time, another part of outdoor fresh air enters the outside of the tube of the plate-tube indirect evaporative cooler 8 through the secondary air inlet 5 under the action of the exhaust fan a13, fully contacts with the spray water, and passes through the water baffle after isenthalpic cooling a11, take away the heat of the condenser 12 and discharge it. The refrigerant is condensed into a liquid state, and sent to the thermal expansion valve 24 through the copper tube G3, and the thermal expansion valve 24 supplies the condensed refrigerant to the evaporator refrigerant coil 25 through the copper tube G4 in a controlled manner, and so on. The cold water produced by the direct expansion refrigeration unit flows out through the water supply port b26, and the high-temperature cold water produced by evaporative cooling flows out through the water supply port a7. The two are mixed in a certain proportion and then supplied to the water supply pipe network through the water supply port c29 and sent to the indoor end.

The cooperative coupling chiller of the present invention combines evaporative cooling with direct expansion refrigeration, effectively improving the efficiency of indirect evaporative cooling, thereby obtaining cold water with a lower temperature; using the secondary exhaust air at a lower temperature to reduce the condensation temperature and pressure, and improving the energy efficiency of the system; The cold water in the cooling section and the mechanical refrigeration section can be flexibly configured, which broadens the temperature range of the outlet water and saves energy and is highly efficient.

Claims (10)

1. a kind of band-tube type indirect evaporating-cooling cooperates with coupling water cooler with evaporative condenser, which is characterized in that including shell (32), packed tower unit is provided in the middle part of shell (32), the symmetrical configuration at left and right sides of the packed tower unit and identical, including The air inlet (1) of side wall is set, and the shell (32) in air inlet (1) is disposed with air filtration according to air-flow direction Device (2), evaporation cooling unit, water fender a (11), direc expansion refrigeration unit, exhaust blower a (13) and exhaust outlet a (14).

2. collaboration according to claim 1 couples water cooler, which is characterized in that the evaporation cooling unit includes plate pipe The bottom of formula indirect evaporation cooler (8), the band-tube type indirect evaporation cooler (8) is provided with cold water storage cistern (6), the plate pipe The top of formula indirect evaporation cooler (8) is disposed with filler a (9) and water distributor a (10) from top to bottom；

The water distributor a (10) and cold water storage cistern (6) are connected by water supplying pipe (33)；

Auxiliary air air inlet (5) are provided on the corresponding shell (32) in band-tube type indirect evaporation cooler (8) bottom end.

3. collaboration according to claim 2 couples water cooler, which is characterized in that also successively set on the water supplying pipe (33) It is equipped with electric water treatment device (3) and water pump (4).

4. collaboration according to claim 2 couples water cooler, which is characterized in that the cold water storage cistern (6) is located at shell (32) bottom is additionally provided with feed water inlet a (7) thereon.

5. collaboration according to claim 2 couples water cooler, which is characterized in that the filler a (9) uses GLASdek Inorganic filler.

6. collaboration according to claim 2 couples water cooler, which is characterized in that the band-tube type indirect evaporation cooler (8) horizontal plate pipe indirect evaporation cooler is used.

7. collaboration according to claim 1 couples water cooler, which is characterized in that the direc expansion refrigeration unit includes Condenser (12) at the top of water fender a (11), condenser (12) is sequentially connected compressor (23) by copper pipe, shell-tube type steams Hair device (31) and heating power expansion valve (24) simultaneously form closure pipeline；

The shell and tube evaporator (31) includes several evaporator refrigerant coil pipes (25) in continuous " S " shape arrangement.

8. collaboration according to claim 7 couples water cooler, which is characterized in that be provided with system on the condenser (12) Cryogen exports (27) and refrigerant inlet (28), and the refrigerant outlet (27) is described by copper pipe G2 connect compressor (23) Compressor (23) is connect by copper pipe G1 connection evaporator refrigerant coil pipe (25), the evaporator refrigerant coil pipe (25) by copper pipe G4 Logical heating power expansion valve (24), the heating power expansion valve (24) connect refrigerant inlet (28) by copper pipe G3.

9. collaboration according to claim 1 couples water cooler, which is characterized in that the packed tower unit include from it is lower to On the filler d (22), filler c (21), filler b (20), water distributor b (19), water fender b (18), the exhaust blower b (16) that set gradually With exhaust outlet b (17).

10. collaboration according to claim 9 couples water cooler, which is characterized in that the section that the filler d (22) is is It is inverted triangle.