CN105972728B - Standpipe indirectly-layering of drawing and pulling type filler sprays compound evaporative cooling air conditioning machine group - Google Patents

Abstract

The evaporative cooling air-conditioning unit disclosed by the present invention is an air-conditioning unit with indirect-drawing type filler layered spraying combined with an organic unit, which includes an organic unit casing, and an air inlet and an air supply port are respectively arranged on the opposite side walls of the unit casing; After the air enters, there are primary filter, indirect evaporative cooler, low-temperature surface cooling unit, pull-type filler layered spray direct cooler, water baffle and blower in the flow direction, and the indirect evaporative cooler above the standpipe corresponds to There is a secondary air outlet on the top wall of the casing of the unit. The evaporative cooling air-conditioning unit of the present invention has the advantages of small size of the unit, high refrigeration efficiency, and the filler is not easy to be blocked, and can meet the refrigeration requirements in extreme weather in summer.

Description

Evaporative cooling air conditioning unit with riser indirect-pulling packing layered spray compound

technical field

The invention belongs to the technical field of air-conditioning equipment, and in particular relates to an evaporative cooling air-conditioning unit with standpipe indirect-drawing type filler layered spray compounding.

Background technique

In recent years, with the improvement of people's quality of life and environmental awareness, how to effectively solve the existing two-stage evaporative cooling air-conditioning units with large volume, low efficiency, high energy consumption, difficult replacement of packing units, and inability to meet cooling requirements in extreme weather in summer The problem has become a key problem to be solved in the current evaporative cooling technology. Therefore, it is imperative to develop a new type of evaporative cooling air-conditioning unit.

In the existing indirect-direct combined evaporative cooling air conditioning units, horizontal heat exchange tubes are generally used in the indirect evaporative cooling unit, which occupies a large space of the unit and increases the volume of the entire air conditioning unit. The direct evaporative cooling unit generally uses dripping Water wets the packing, and the contact between air and water is not sufficient, resulting in low cooling efficiency and high water-carrying rate of the air. In long-term use, the packing is easy to block and difficult to replace; especially in extreme weather in summer, The cooling capacity of such air conditioning units is often not up to the requirement.

In order to solve the problems existing in the existing two-stage evaporative cooling device, an evaporative cooling air-conditioning unit was developed by combining the vertical pipe indirect cooling technology with the pull-type packing layered spray technology, which not only reduces the volume of the original unit, but also The cooling efficiency of the unit is improved; the stacked layered pull-out packing unit is also used in the unit, which can not only increase the contact area between air and water, but also not easy to block the packing and facilitate the maintenance and replacement of the packing, and can also significantly reduce the air leakage. water carrying rate; in addition, it can also meet the cooling requirements when extreme weather occurs in summer.

Contents of the invention

The purpose of the present invention is to provide an evaporative cooling air-conditioning unit with standpipe indirect-pull-type filler layered spray combination, which has the advantages of small unit size, high refrigeration efficiency, and the packing is not easy to block, and can meet the cooling requirements in extreme weather in summer .

The technical solution adopted in the present invention is that the evaporative cooling air-conditioning unit of standpipe indirect-pull-type filler layered spraying compound includes an organic unit casing, and the opposite side walls of the unit casing are respectively provided with air inlets and air outlets ;In the shell of the unit, according to the flow direction after the air enters, there are primary filter, vertical pipe indirect evaporative cooler, low-temperature surface cooling unit, pull-type packing layered spray direct cooler, water baffle and blower, vertical pipe indirect A secondary air exhaust port is provided on the top wall of the unit shell corresponding to the evaporative cooler.

The present invention is also characterized in that:

A secondary fan is arranged in the secondary air exhaust port.

The blower is arranged on the fan support.

The vertical pipe indirect evaporative cooler includes a vertical heat exchange tube group, and the top of the vertical heat exchange tube group is provided with a water distribution pipe and a water retaining packing unit in sequence, and a plurality of facing vertical heat exchange tube groups are evenly arranged on the water distribution pipe. Nozzles for spraying; a reservoir is set under the vertical heat exchange tube group, the water distribution pipe is connected to the reservoir through a water supply pipe, and a circulating water pump a is arranged on the water supply pipe; between the vertical heat exchange tube group and the reservoir An air duct is formed, and the side wall of the casing corresponding to the air duct is provided with a secondary air inlet.

The vertical heat exchange tube group is composed of a plurality of vertically arranged heat exchange tubes; the heat exchange tubes are provided with helical wires.

The low-temperature surface cooling unit is composed of a low-temperature surface cooler and a water inlet pipe and an outlet pipe connected to the low-temperature surface cooler.

The pull-type packing layered spraying direct cooler includes a frame, and a layered packing-spray composite system and a circulating water tank are arranged on the upper and lower sides of the frame; the layered packing-spraying composite system is connected to the circulating water tank through a spray pipe.

Layered filler-spray compound system, including multiple pull-out filler racks arranged up and down, each pull-out filler rack is equipped with a handle; each pull-out filler rack is equipped with filler, and the air inlet of the filler A horizontal circulating water pipe is arranged on the side, and a plurality of atomizing nozzles vertically facing the filler spray are evenly arranged on the horizontal circulating water pipe, and the horizontal circulating water pipe is connected with the spray pipe.

The packing is set at an inclination of 45°.

The top and bottom of the packing are covered with a single layer of fiberglass screen.

The beneficial effects of the present invention are:

(1) The evaporative cooling air-conditioning unit of the present invention adopts a riser indirect evaporative cooler, which has the advantages of uniform water distribution and wide flow channels, can overcome the problem of easy blockage in the horizontal heat exchange tube, and improve the secondary air and water quality. The heat exchange efficiency is high, the indirect evaporative cooler with vertical pipes has a stronger air handling capacity, and more importantly, it reduces the occupied area of the heat exchange tubes and reduces the volume of the entire unit.

(2) The evaporative cooling air-conditioning unit of the present invention adds a low-temperature surface cooling unit between the standpipe indirect evaporative cooler and the pull-type packing layered spray direct cooler, which overcomes the extreme weather of the existing evaporative cooling unit in summer. Deficiencies that cannot meet the refrigeration requirements; and the combination of evaporative cooling technology and mechanical surface cooling technology makes the unit more flexible and control precision.

(3) The evaporative cooling air-conditioning unit of the present invention adopts atomized wetting fillers in the pull-type packing layered spray direct cooler instead of dripping wetting fillers, which not only increases the contact between air and water area, but also reduces water consumption and improves cooling efficiency.

(4) In the evaporative cooling air-conditioning unit of the present invention, in the pull-type filler layered spray direct cooler, the filler is stacked in a lightweight frame, and the filler can be pulled out along with the frame, which is convenient for the overall Or local cleaning and maintenance, and easy to replace.

(5) In the evaporative cooling air-conditioning unit of the present invention, in the pull-type filler layered spray direct cooler, each piece of filler is set at an angle of 45° in its respective frame, which can increase the contact area between the filler and the air, and is installed in the The atomizing nozzle on the horizontal circulating water pipe is located on the air inlet side of the filler, and is arranged at 90° to the inclined filler; the atomizing nozzle sprays a solid rather than hollow square cone water mist, which is generated by atomizing the water droplets The larger contact area between air and water enhances the heat exchange capacity between air and water, thereby improving the heat exchange efficiency of the unit and the ability to process air.

Description of drawings

Fig. 1 is the structural representation of evaporative cooling air-conditioning unit of the present invention;

Fig. 2 is a schematic structural view of the pull-type filler layered spray direct cooler in the evaporative cooling air-conditioning unit of the present invention.

In the figure, 1. Air inlet, 2. Primary filter, 3. Secondary air exhaust port, 4. Vertical heat exchange tube group, 5. Circulating water pump a, 6. Low temperature surface cooler, 7. Atomization Nozzle, 8. Water distribution pipe, 9. Filler, 10. Circulating water pump b, 11. Air supply port, 12. Blower fan, 13. Frame, 14. Water supply pipe, 15. Fan bracket, 16. Water baffle, 17. Nozzle, 18. Cistern, 19. Water retaining filler unit, 20. Handle, 21. Secondary fan, 22. Secondary air inlet, 23. Spray pipe, 24. Circulating water tank, 25. Horizontal circulating water pipe.

Detailed ways

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

The evaporative cooling air-conditioning unit of the present invention is composed of standpipe indirect-pulling packing layered spraying, its structure is shown in Figure 1, including an organic unit casing, and the opposite side walls of the unit casing are respectively provided with an air inlet 1, The air outlet 11, the casing of the unit is provided with the primary filter 2, the standpipe indirect evaporative cooler, the low-temperature surface cooling unit, the pull-type packing layered spray direct cooler, the water baffle 16 and A blower 12 and a secondary air outlet 3 are arranged on the top wall of the unit housing above the standpipe indirect evaporative cooler.

Both the air inlet 1 and the air outlet 11 are provided with air volume control valves.

A secondary air blower 21 is arranged in the secondary air outlet 3 .

The blower 12 is arranged on the blower support 15, the blower support 15 is made of stainless steel, and the blower support 15 is used for fixing the blower 12.

The standpipe indirect evaporative cooler includes a vertical heat exchange tube group 4. A water distribution pipe 8 and a water retaining packing unit 19 are sequentially arranged above the vertical heat exchange tube group 4. The water distribution pipe 8 is evenly provided with a plurality of facing vertical Type heat exchange tube group 4 spray nozzle 17; the bottom of the vertical heat exchange tube group 4 is provided with a reservoir 18, the water distribution pipe 8 is connected with the reservoir 18 through the water supply pipe 14, and the water supply pipe 14 is provided with a circulating water pump a5: An air duct is formed between the vertical heat exchange tube group 4 and the reservoir 18 , and a secondary air inlet 22 is provided on the side wall of the unit casing corresponding to the air duct.

A flow equalizing grille is arranged in the secondary air inlet 22 .

The vertical heat exchange tube group 4 is composed of a plurality of vertically arranged heat exchange tubes, and the heat exchange tubes are provided with a helix, which has the characteristics of uniform water distribution, wide flow channel, no blockage, small flow resistance, and is conducive to evaporative cooling. , and more importantly, the occupied area of the heat exchange tubes is reduced, and the volume of the whole unit is reduced.

The low-temperature surface cooling unit is composed of a low-temperature surface cooler 6 and a water inlet pipe and an outlet pipe connected to the low-temperature surface cooler 6; control valves are arranged on the water inlet pipe and the water outlet pipe; the low-temperature surface cooler 6 can be connected to low-temperature refrigeration water to meet the cooling requirements of users in extreme summer weather.

The pull-type filler layered spray direct cooler, as shown in Figure 2, includes a frame 13, and the upper and lower layers of the frame 13 are provided with a layered filler-spray composite system and a circulating water tank 24; the layered filler-spray composite system It is connected with the circulating water tank 24 through the spray pipe 23 .

The layered filler-spray composite system includes a plurality of pull-out filler racks arranged up and down, and each pull-out filler rack is provided with a handle 20; each pull-out filler rack is provided with a filler 9, a filler 9 The air inlet side is provided with a horizontal circulating water pipe 25, which is uniformly provided with a plurality of atomizing nozzles 7 vertically facing the filler 9 to spray, and the horizontal circulating water pipe 25 is connected with the spray pipe 23.

The filler 9 is arranged at a 45° inclination.

The top and bottom of the filler 9 are covered with a single-layer glass fiber filter, which helps to distribute water evenly into the filler 9 .

The function of the handle 20 is to pull out the pull-out packing frame from the frame 13 to facilitate replacement of the packing 9 inside. What the atomizing nozzle 7 sprays is a solid instead of a hollow cube-shaped water mist. The larger contact area can wet the filler 9 well, and the soaked filler 9 can make the air flow through it at a downward angle of 45°. , so that the air can be fully humidified and cooled, thereby improving the cooling effect of the unit. The cooled air passes upward through the water baffle 16, and the water mist is removed by changing the direction of the airflow and under the action of gravity, thereby reducing the water carrying rate of the air.

The specific working process of the evaporative cooling air-conditioning unit of the present invention is indirect-pull-out filler layered spray composite is as follows:

(1) The first working mode:

In the combined mode of the standpipe indirect evaporative cooler and the pull-type packing layered spray direct cooler, the circulating water pump a5 in the standpipe indirect evaporative cooler and the circulating water pump b10 in the pull-out packing layered spray direct cooler are turned on , turn on the secondary air blower 21 and the air blower 12 simultaneously, and the specific work process is as follows:

In summer operating conditions, the outdoor high-temperature and humid fresh air enters the unit shell from the air inlet 1, and enters the standpipe indirect evaporative cooler after being filtered by the primary filter 2; the air passes through the standpipe indirect evaporative cooler Outside the heat exchange tube, the secondary air flows through the heat exchange tube. In the heat exchange tube, the secondary air exchanges heat and moisture with the water film attached to the inner wall of the heat exchange tube and takes away the heat from the primary air side. The secondary air is discharged through the secondary air outlet 3, and the primary air (that is, fresh air) enters the pull-type filler layered spray direct cooler after being wet-cooled. Then flow into the layered filler-spray compound system, now each piece of filler 9 is fully wetted by the droplets sprayed by atomizing nozzle 7, and the air is further cooled and humidified when it flows through the filler 9, forming cold air; After passing through the water retaining plate 16, the air is sent into the room through the air supply port 11 under the action of the air blower 12.

(2) The second working mode:

The combined mode of the standpipe indirect evaporative cooler and the low-temperature surface cooling unit. At this time, the circulating water pump a5 in the standpipe indirect evaporative cooler, the circulation system of the low-temperature surface cooler 6, the secondary fan 21 and the blower 12 are turned on. The specific working process as follows:

The operating conditions during extreme weather in summer are:

The fresh air with relatively high temperature and humidity outside enters the casing of the unit from the air inlet 1, and enters the vertical pipe indirect evaporative cooler after being filtered by the primary filter 2; The secondary air flows through the heat exchange tube. In the heat exchange tube, the secondary air exchanges heat and moisture with the water film attached to the inner wall of the heat exchange tube and takes away the heat from the primary air side. After heat exchange, the secondary air passes through the secondary air. The air outlet 3 is discharged, and the primary air (fresh air) is wet-cooled, and then enters the low-temperature surface cooler 6 for dehumidification and cooling; , after the air supply requirement is met, it is sent into the room through the air supply port 11 under the action of the blower fan 12 .

(3) The third working mode:

Only open the pull-type filler layered spray direct cooler and blower 12, that is, the circulating water pump b10 and blower 12 in the pull-type filler layered spray direct cooler start to run, and the specific working process is as follows:

The operating conditions during the transition season are:

The outdoor fresh air enters the unit shell from the air inlet 1, and after being filtered by the primary filter 2, it enters the pull-type packing layered spray direct cooler for humidification and cooling; In this process, the vertical pipe indirect evaporative cooler and the low-temperature surface cooling unit are not in operation.

The evaporative cooling air-conditioning unit with standpipe indirect-pull-type filler layered spray compounding of the present invention solves the existing two-stage evaporative cooling air-conditioning units with low refrigeration efficiency, easy plugging of fillers and difficult replacement, large unit volume, and high water-carrying rate. And the problem that it cannot meet the cooling requirements in extreme weather in summer.

Claims (6)

1. standpipe indirectly-layering of drawing and pulling type filler sprays compound evaporative cooling air conditioning machine group, which is characterized in that include unit Shell is respectively arranged with air inlet (1), air outlet (11) on the opposite two side of the machine unit shell；In the machine unit shell By air into rear flow direction be disposed with primary filter (2), standpipe indirect evaporation cooler, the cold unit of cryometer, Drawing and pulling type filler layering spraying direct cooler, water fender (16) and pressure fan (12), on the standpipe indirect evaporation cooler It is provided with auxiliary air exhaust outlet (3) on the corresponding machine unit shell roof in side；

The drawing and pulling type filler layering spraying direct cooler, includes frame (13), setting is gone to upper and lower in the frame (13) There are layering filler-spraying hybrid system, cyclic water tank (24)；

Layering filler-spraying the hybrid system is connect by injection spray pipe (23) with cyclic water tank (24)；

It is in drawing and pulling type stuffing frame setting up and down, each drawing and pulling type filler that the layering filler-spraying hybrid system, which includes multiple, Handle (20) is both provided on frame；

It is provided with filler (9) in each drawing and pulling type stuffing frame, the inlet side of the filler (9) is provided with horizontal cyclic water pipe (25)；

Multiple atomizers (7) for being facing perpendicularly to filler (9) spraying are evenly arranged on the horizontal cyclic water pipe (25), it is described Horizontal cyclic water pipe (25) is connect with injection spray pipe (23)；

The filler (9) is obliquely installed in 45 °；

The top and bottom of the filler (9) are coated with single-layer glass fiber strainer.

2. evaporative cooling air conditioning machine group according to claim 1, which is characterized in that in the auxiliary air exhaust outlet (3) It is provided with overfire air fan (21).

3. evaporative cooling air conditioning machine group according to claim 1, which is characterized in that the pressure fan (12) is set to wind turbine On holder (15).

4. evaporative cooling air conditioning machine group according to claim 1, which is characterized in that the standpipe indirect evaporation cooler, Include vertical heat exchanging pipe group (4), the vertical heat exchanging pipe group (4) has been sequentially arranged above water distributor (8), water blocking filler list First (19) are evenly arranged with multiple nozzles (17) sprayed towards vertical heat exchanging pipe group (4) on the water distributor (8)；

Cistern (18) is provided with below the vertical heat exchanging pipe group (4), the water distributor (8) passes through feed pipe (14) and storage Pond (18) connects, and water circulating pump a (5) is provided on the feed pipe (14)；

Air duct is formed between the vertical heat exchanging pipe group (4) and cistern (18), on the corresponding machine unit shell side wall in the air duct It is provided with auxiliary air air inlet (22).

5. evaporative cooling air conditioning machine group according to claim 4, which is characterized in that the vertical heat exchanging pipe group (4) is by more The heat exchanger tube that root is vertically arranged is constituted；

It is provided with helix in the heat exchanger tube.

6. evaporative cooling air conditioning machine group according to claim 1, which is characterized in that the cold unit of cryometer is by cryometer Cooler (6) and the water inlet pipe being connected on low temperature surface cooler (6), outlet pipe are constituted.