CN111306673A - Evaporative condenser combining vertical pipe indirect evaporative cooling - Google Patents

Abstract

The invention discloses an evaporative condenser combined with indirect evaporative cooling of vertical pipes. The lower part and the upper part of the right side wall of the casing are respectively provided with an air inlet and an air outlet. The evaporative condenser combined with the indirect evaporative cooling of the standpipe of the present invention uses the exhaust air of the evaporative condensation unit and the indirect evaporative cooler of the standpipe for the primary cooling of the high-temperature refrigerant, and the cooled refrigerant enters the evaporative condensation unit for secondary cooling. Cooling, making full use of the cooling capacity, improving the energy efficiency of the condenser, and solving the problem of low cooling efficiency of the existing evaporative condenser.

Description

Evaporative condenser combined with riser indirect evaporative cooling

technical field

The invention belongs to the technical field of air conditioning equipment, and relates to an evaporative condenser combined with indirect evaporative cooling of a vertical pipe.

Background technique

With the development of science, technology and economy, the improvement of people's material living standards, the application of refrigeration technology is more and more extensive. As an indispensable heat exchange equipment in the refrigeration system, the evaporator can be divided into water-cooled type according to the different cooling medium. , air-cooled and evaporative-cooled. With the development of air-conditioning technology, traditional mechanical refrigeration and air-conditioning methods are facing transformation and upgrading. Evaporative cooling technology is a green energy-saving technology that uses water evaporation to absorb heat and refrigeration. Evaporative condensers use evaporative cooling technology to combine cooling towers and condensers. One", using air and water as the cooling medium, through the direct or indirect contact between the air and the water, the heat and moisture exchange between the air and the water is carried out, and the high temperature refrigerant is cooled. The use of evaporative cooling technology is more in line with the national green environmental protection and sustainable development policy, and also in line with the general direction of the national energy conservation and emission reduction strategy.

The cooling efficiency of the existing evaporative condenser is not high.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an evaporative condenser combined with the indirect evaporative cooling of the riser, the exhaust air of the evaporative condensation unit and the indirect evaporative cooler of the riser is used for the primary cooling of the high-temperature refrigerant, and the cooled refrigerant enters the evaporation The condensing unit performs secondary cooling, makes full use of the cooling capacity, improves the energy efficiency of the condenser, and solves the problem of low cooling efficiency of the existing evaporative condenser.

The technical solution adopted in the present invention is that the evaporative condenser combined with the indirect evaporative cooling of the vertical pipe includes a condenser shell, and the inside of the condenser shell is divided into two parts, left and right, and an evaporative cooling unit and a vertical indirect evaporative cooler are respectively arranged The lower part and the upper part of the right side wall of the condenser shell are respectively provided with an air inlet and an air outlet.

The present invention is also characterized in that,

The standpipe indirect evaporative cooler includes a standpipe heat exchanger, a water storage tank b is arranged below the standpipe heat exchanger, and a water distribution device b, a water baffle b, two The secondary fan and the air outlet b, the water storage tank b and the water distribution device b are communicated through the water supply pipe b.

The water supply pipe b is connected with a circulating water pump b and a regulating valve b.

A coarse filter is arranged between the standpipe heat exchanger and the air inlet.

A floating ball valve b is arranged in the water storage tank b.

A centrifugal fan is arranged at the air outlet.

The evaporative cooling unit includes fillers arranged corresponding to the air inlets. Above the fillers, a condensing coil, a water distribution device a, a water baffle a, an exhaust fan and an air outlet a are sequentially arranged from bottom to top, and a water storage tank a is arranged below the fillers. The water storage tank a and the water distribution device a are connected through the water supply pipe a. The condenser shell is also provided with a condensing coil above the riser indirect evaporative cooler and the evaporative cooling unit. The coil is connected with the condensing coil located between the packing and the water distribution device a. The refrigerant outlet of the condensing coil protrudes from the condenser shell near the packing, and the refrigerant inlet of the condensing coil is located in the evaporative cooling unit. The upper corresponding side wall of the condenser shell protrudes.

The water supply pipe a is also provided with a circulating water pump a and a regulating valve a.

A floating ball valve a is also arranged in the water storage tank a.

The filler is arranged in a right-angled trapezoid shape, and the inclined surface of the filler is inclined upward toward the air inlet.

The beneficial effects of the present invention are:

(1) In the present invention, the exhaust air of the evaporative condensation unit and the riser indirect unit is used for the primary cooling of the high-temperature refrigerant, and the cooled refrigerant enters the evaporative condensation unit for secondary cooling, making full use of the cooling capacity and improving the energy efficiency of the condenser ;

(2) The indirect evaporative cooling section of the present invention adopts a vertical tube indirect evaporative cooler, the secondary air and spray water are directly evaporatively cooled in the wet channel in the vertical tube, and the primary air flows through the dry channel outside the tube and the tube wall contacts the Equipped with wet cooling, the wider air flow channel outside the tube is not easy to block and is easy to clean; due to the top-down scouring effect of the circulating water, the blockage problem in the heat exchange tube can be effectively alleviated; the heat exchanger tube bundle is vertical, which can reduce The small heat exchange tube occupies an area in the horizontal direction; the porous ceramic material is used, the material has high porosity and high strength, which can effectively increase the specific surface area and strengthen the heat exchange effect;

(3) The present invention uses a vertical tube indirect evaporative cooler to pre-cool the fresh air, and the pre-cooled fresh air passes heat and moisture exchange with water in the packing of the evaporative condensing unit and swept over the surface of the condensing coil from bottom to top, and further It reduces the temperature of the refrigerant in the condensing coil, and also effectively reduces the temperature of the exhaust air.

(4) In the vertical indirect evaporative condenser of the present invention, the packing adopts a combined packing. The combined packing is arranged in two layers, the upper layer is a cube material, and the lower layer is a "triangular pyramid" type packing, which not only increases the packing capacity The volume and the contact area with the air, and the inclined surface design of the bottom filler effectively adjusts the problem of uneven resistance when the airflow contacts the filler.

(5) In the standpipe indirect evaporative condenser of the present invention, the packing adopts the bottom type, and the packing is placed at the lower part of the condensing coil. Coil tube, improve heat exchange efficiency, and reduce circulating water temperature at the same time.

Description of drawings

Fig. 1 is the structural representation of the evaporative condenser combined with the indirect evaporative cooling of the vertical pipe of the present invention;

FIG. 2 is a schematic structural diagram of the cooling unit of the indirect evaporative cooler in the evaporative condenser combined with the indirect evaporative cooling of the vertical tube according to the present invention.

In the figure, 1. Air inlet, 2. Air outlet, 3. Centrifugal fan, 4. Refrigerant inlet, 5. Air outlet a, 6. Exhaust fan, 7. Water baffle a, 8. Water distribution device a , 9. Condensing coil, 10. Refrigerant outlet, 11. Packing, 12. Water storage tank a, 13. Circulating water pump a, 14. Float valve a, 15. Water supply pipe a, 16. Standpipe indirect evaporative cooler , 17. Water storage tank b, 18. Circulating water pump b, 19. Floating ball valve b, 20. Water supply pipe b, 21. Coarse filter section, 22. Water distribution device b, 23. Water baffle b, 24. Two Secondary fan, 25. Air outlet b, 26. Condenser shell, 27. Regulating valve b, 28. Regulating valve a.

Detailed ways

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

The evaporative condenser combined with the indirect evaporative cooling of the vertical pipe of the present invention has its structure as shown in FIG. 1 and includes a condenser shell 26. The condenser shell 26 is divided into two parts: the left and the right, and the evaporative cooling unit and the vertical pipe are respectively provided with In the indirect evaporative cooler, the lower part and the upper part of the right side wall of the condenser shell 26 are respectively provided with an air inlet 1 and an air outlet 2 .

The riser indirect evaporative cooler includes a riser heat exchanger 16, a water storage tank b17 is arranged below the riser heat exchanger 16, and a water distribution device b22 and a water baffle are arranged above the riser heat exchanger 16 in order from bottom to top b23, the secondary fan 24, the air outlet b25, the water storage tank b17 and the water distribution device b22 are communicated through the water supply pipe b20.

A circulating water pump b18 and a regulating valve b27 are connected to the water supply pipe b20.

A coarse filter 21 is arranged between the standpipe heat exchanger 16 and the air inlet 1 .

A float valve b19 is provided in the water storage tank b17.

A centrifugal fan 3 is arranged at the air outlet 2 .

The evaporative cooling unit includes a filler 11 arranged corresponding to the air inlet 1. Above the filler 11, from bottom to top, a condensing coil 9, a water distribution device a8, a water baffle a7, an exhaust fan 6 and an air outlet a5 are arranged in order. There is a water storage tank a12, the water storage tank a125 and the water distribution device a8 are connected through the water supply pipe a15, and the condenser shell 26 is located above the riser indirect evaporative cooler and the evaporative cooling unit. There is also a condensing coil, which is located in the riser indirect evaporative cooler. The cooler and the condensing coil above the evaporative cooling unit and the condensing coil 9 located between the packing 11 and the water distribution device a8 are connected as a whole, and the refrigerant outlet 10 of the condensing coil 9 protrudes from the condenser shell near the packing 11. 26. The refrigerant inlet 4 of the condensing coil 9 protrudes from the corresponding side wall of the condenser housing 26 located above the evaporative cooling unit.

The water supply pipe a15 is also provided with a circulating water pump a13 and a regulating valve a28.

A float valve a14 is also arranged in the water storage tank a12.

The packing 11 is set in the shape of a right-angled trapezoid. The inclined surface of the packing 11 is inclined upward toward the air inlet 1. The packing 12 is arranged in two layers.

The heat exchange tube material of the riser indirect evaporative cooler adopts porous ceramic material.

The exhaust fan 6 and the secondary fan 24 are axial flow fans.

The water baffles a7 and b23 between the water distribution device a8 , the water distribution device b22 , the exhaust fan 6 , and the secondary fan 24 are corrugated water baffles.

The working principle of the evaporative condenser of the present invention:

The outdoor fresh air enters the unit through the air inlet 1, and after being filtered by the coarse filter 21, it reaches the indirect evaporative cooler of the riser. Air.

The pre-cooled fresh air enters the evaporative and condensing section, conducts direct evaporative cooling in the packing 11, and exchanges heat and moisture with the water in the packing 11. After the humidity is cooled, it sweeps over the outside of the condensing coil 9 from bottom to top, and the high-temperature refrigerant is cooled by The refrigerant inlet 4 enters the condensing coil 9, and performs primary cooling with the exhaust air of the unit. The water film on the outer wall of the condensing coil 9 exchanges heat and moisture with the cooled fresh air to take away the heat of the refrigerant in the pipe, and the refrigerant is cooled for a second time. , the cooled refrigerant is discharged from the unit through the refrigerant outlet 10, and the air after heat and moisture exchange is discharged from the unit through the air outlet 2 through the centrifugal fan 3.

Claims (10)

1. The evaporative condenser combined with the indirect evaporative cooling of the vertical pipe is characterized in that it comprises a condenser shell (26), and the condenser shell (26) is divided into left and right parts and is respectively provided with an evaporative cooling unit and an evaporative cooling unit. In the vertical pipe indirect evaporative cooler, the lower part and the upper part of the right side wall of the condenser shell (26) are respectively provided with an air inlet (1) and an air outlet (2). 2 . The evaporative condenser according to claim 1 , wherein the indirect evaporative cooler of the standpipe comprises a standpipe heat exchanger ( 16 ), and an accumulator is arranged below the standpipe heat exchanger ( 16 ). 3 . The water tank b (17), the water distribution device b (22), the water baffle b (23), the secondary fan (24) and the air outlet are sequentially arranged above the standpipe heat exchanger (16) from bottom to top b(25), the water storage tank b(17) and the water distribution device b(22) are communicated through the water supply pipe b(20). 3 . The evaporative condenser according to claim 2 , wherein a circulating water pump b ( 18 ) and a regulating valve b ( 27 ) are connected to the water supply pipe b ( 20 ). 4 . 4 . The evaporative condenser according to claim 2 , wherein a coarse filter ( 21 ) is arranged between the stand pipe heat exchanger ( 16 ) and the air inlet ( 1 ). 5 . 5. The evaporative condenser according to claim 2, characterized in that, a floating ball valve b (19) is provided in the water storage tank b (17). 6. The evaporative condenser according to claim 1 or 2, characterized in that, a centrifugal fan (3) is provided at the air outlet (2). 7. The evaporative condenser according to claim 1 or 2, characterized in that, the evaporative cooling unit comprises a filler (11) provided corresponding to the air inlet (1), and the filler (11) is arranged from below The condensing coil (9), the water distribution device a (8), the water baffle a (7), the exhaust fan (6) and the air outlet a (5) are arranged in sequence from the top. The water storage tank a (12), the water storage tank a (125) and the water distribution device a (8) are connected through the water supply pipe a (15), and the condenser shell (26) is located in the riser indirect evaporative cooler And above the evaporative cooling unit is also provided with a condensing coil, which is located in the indirect evaporative cooler of the standpipe and the condensing coil above the evaporative cooling unit is connected with the condensing coil (9) located between the packing (11) and the water distribution device a (8). Provided in one piece, the refrigerant outlet (10) of the condensing coil (9) protrudes from the condenser shell (26) near the packing (11), and the refrigerant inlet of the condensing coil (9) (4) Protruding from the side wall of the corresponding condenser housing (26) located above the evaporative cooling unit. 8 . The evaporative condenser according to claim 7 , wherein a circulating water pump a ( 13 ) and a regulating valve a ( 28 ) are further provided on the water supply pipe a ( 15 ). 9 . 9 . The evaporative condenser according to claim 7 , wherein a float valve a ( 14 ) is further provided in the water storage tank a ( 12 ). 10 . 10 . The evaporative condenser according to claim 7 , wherein the packing ( 11 ) is arranged in a right-angled trapezoid shape, and the inclined surface of the packing ( 11 ) is inclined upward toward the air inlet ( 1 ). 11 . .

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