A new plate type evaporative air cooler

Abstract

The utility model relates to air cooler technical field, specifically disclose a novel plate type evaporative air cooler, include: casing, be located in the air inlet area of casing top surface both sides and be located in the air outlet area of casing top surface middle part, form the cavity that will air inlet area and air outlet area lead through in casing, be located in the air inlet area just below and be located in the middle part of casing plate type heat exchange area, include a plurality of plate type heat exchange unit, be located between air inlet area and plate type heat exchange area respectively spray area, be equipped with the spraying device that carries out the spraying of plate type heat exchange area in spray area, be located in plate type heat exchange area just below auxiliary heat exchange area, be located in auxiliary heat exchange area just below water storage area, use the sheet to replace traditional heat exchange pipe as heat exchange channel, heat exchange area is bigger, and heat transfer coefficient is higher, can use physical means to clean scale more conveniently, and plate type heat exchange unit adopts the design of modularization, is favorable to the disassembly, maintenance of equipment.

Description

Technical Field

[0001] This application relates to the field of air cooler technology, and specifically discloses a novel plate-type evaporative air cooler. Background Technology

[0002] Evaporative air coolers are heat exchange devices that cool the medium by means of air temperature rise and partial evaporation of spray water. They are characterized by high heat exchange efficiency, compact structure, and small footprint. Currently, mainstream evaporative air coolers are primarily designed and manufactured with tubular structures, using bare tube bundles as the heat exchange device. The tube bundles are arranged in a staggered configuration, creating either co-current or counter-current airflow structures. During the heat exchange process, the medium being cooled / condensed flows horizontally inside the tube bundle, while the spray water and air flow vertically outside the tube bundle; only heat is transferred between the inside and outside of the tubes, not mass.

[0003] To enhance the heat exchange capacity of a single unit, increasing the number of tube rows during design and timely descaling during operation are effective methods for tubular evaporative air coolers. However, increasing the number of tube rows reduces the heat exchange efficiency of a single tube and requires increased power from fans and pumps to meet airflow and spray density demands, thus increasing electricity and water consumption, contradicting the intention of water and electricity conservation. Timely descaling is most effective when it is removed in its early stages of formation; otherwise, once the scale accumulates and forms a dense structure, the difficulty and effectiveness of cleaning will be significantly reduced. Given the compact tube arrangement of tubular evaporative air coolers, physical cleaning methods are time-consuming and labor-intensive, while using descaling agents generates wastewater and negatively impacts the corrosion resistance of the tube bundles. Therefore, this invention provides a novel plate-type evaporative air cooler to address these problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the plate heat exchange zone of traditional evaporative air coolers is prone to scaling, making it difficult to clean and affecting heat exchange performance.

[0005] To achieve the above objectives, the basic solution of this utility model provides a novel plate-type evaporative air cooler, comprising:

[0006] case;

[0007] An air inlet area is located on both sides of the top surface of the shell, and an air outlet area is located in the middle of the top surface of the shell. A cavity is formed inside the shell that connects the air inlet area and the air outlet area.

[0008] The plate heat exchange zone, located directly below the air inlet area and in the middle of the shell, includes several plate heat exchange units;

[0009] The spray zone is located between the air inlet zone and the plate heat exchange zone, and the spray zone is equipped with a spray device to spray the plate heat exchange zone.

[0010] The auxiliary heat exchange area is located directly below the plate heat exchange area;

[0011] The water storage area is located directly below the auxiliary heat exchange zone.

[0012] Furthermore, the air intake area includes an air intake grille and a walkway provided on the surface of the housing, and both the air intake grille and the walkway are provided with several through holes that communicate with the cavity inside the housing.

[0013] The air outlet area includes several air ducts on the upper surface of the shell, fans respectively installed in the air ducts, and first water collectors respectively located below the fans. The highest height of the air ducts is higher than the highest height of the air inlet area.

[0014] Furthermore, baffles are provided at the periphery of the air intake area.

[0015] Furthermore, a cleaning platform is provided between the plate heat exchange zone and the auxiliary heat exchange zone.

[0016] Furthermore, the auxiliary heat exchange zone can be any one of packing rack heat exchange, bubble heat exchange, or air heat exchange.

[0017] Furthermore, the packing rack heat exchanger includes a packing rack located below the plate heat exchange zone and a second water collector located at the junction of the auxiliary heat exchange zone and the air outlet zone.

[0018] Furthermore, the plate heat exchange unit includes a heat exchange plate bundle located below the spray zone, an inlet pipe box and an outlet pipe box respectively connected to both ends of the heat exchange plate bundle, and an inlet flange and an outlet flange respectively provided on the inlet pipe box and the outlet pipe box.

[0019] Furthermore, the heat exchange plate bundle includes one or more pairs of equidistantly distributed plates, each plate pair forming a heat exchange medium flow channel, and adjacent plate pairs forming a cooling medium flow channel for spraying water and air.

[0020] Furthermore, a turbulence zone is provided within the cooling medium flow channel.

[0021] Furthermore, the plate pair includes two plates arranged symmetrically or asymmetrically, with raised or recessed textures uniformly arranged on the surface of the plates, and a heat exchange medium flow channel is formed between the two plates. The cross-section of the heat exchange medium flow channel is any one of hexagonal, elliptical, teardrop, or rectangular shapes.

[0022] Furthermore, each of the plate heat exchange units is installed horizontally or at an angle. When installed at an angle, the inlet end of the plate heat exchange unit is higher than the outlet end and has an angle of 1°-3°.

[0023] Furthermore, it also includes a hydraulic pump for extracting wastewater, a side-stream filtration system for treating wastewater, a dosing device for adding chemicals to the side-stream filtration system, and water quality monitoring equipment for detecting the water quality of the side-stream filtration system.

[0024] The principle and effect of this solution are as follows:

[0025] 1. This utility model uses plates to replace traditional heat exchange tubes as heat exchange channels, resulting in a larger heat exchange area and a higher heat transfer coefficient. It also makes it easier to clean scale using physical means. At the same time, the plate heat exchange unit adopts a modular design, which facilitates the disassembly and maintenance of the equipment, thus solving the problem that scale easily forms in the plate heat exchange area of ​​traditional evaporative air coolers, affecting heat exchange performance.

[0026] 2. In the heat exchange process of the plate-type evaporative air cooler of this utility model, the interior of each plate pair is the heat medium, and the space between the plate pairs is sprayed water-air. The sprayed water and air flow in the same direction, and the sprayed water and air are fully mixed by the turbulence zone to form turbulence, resulting in better heat exchange effect. After heat exchange, the sprayed water enters the packing frame and undergoes secondary evaporative heat exchange with the fresh air. The sprayed water is cooled down, increasing the average logarithmic temperature difference in the heat exchange process. At the same time, the solubility of compounds in the sprayed water decreases, and some compounds precipitate and adhere to the surface of the packing frame. After heat exchange, the air is close to saturated humid air and is discharged through the air outlet area.

[0027] 3. This utility model increases the heat exchange area by setting raised or recessed textures on the plates, making it easier for the fluid to form turbulence and thus improving its surface heat transfer coefficient. Furthermore, its permeable arrangement ensures a continuous and uniform water film. For limited space, the plate-type evaporative air cooler offers a larger heat exchange area and stronger heat exchange capacity; it improves the processing and assembly efficiency of heat exchange equipment, reduces the equipment production cycle, and effectively ensures project implementation. The larger spacing between the plates makes it easier to physically clean scale buildup on their outer surfaces using tools such as brushes or high-pressure water guns. The vertical arrangement of the plates also facilitates the direct removal of scale by gravity, effectively ensuring the equipment's online operating time and heat exchange efficiency.

[0028] 4. The plate heat exchange zone in this embodiment adopts a modular design of multiple plate heat exchange units. If the equipment needs to be disassembled, one or more plate heat exchange units can be shut down and then removed, which facilitates cleaning and maintenance, avoids downtime of the entire machine for maintenance, and further ensures the online service time and heat exchange efficiency of the equipment.

[0029] 5. This utility model employs an auxiliary heat exchange zone to assist in heat exchange of the spray water. Fresh air comes into contact with the spray water, and some of the spray water further evaporates, cooling the spray water and improving the overall heat exchange capacity of the equipment. At the same time, the spray water flows slowly on the packing frame, which facilitates the formation of scale on the packing frame, thereby reducing scale on the plate heat exchange zone. After scale buildup on the packing frame, it can be removed for cleaning or replaced. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of a novel plate-type evaporative air cooler according to an embodiment of this application is shown;

[0032] Figure 2 This paper shows a schematic diagram of the air inlet zone A in a novel plate-type evaporative air cooler according to an embodiment of this application.

[0033] Figure 3 A schematic diagram of the plate heat exchange zone in a novel plate evaporative air cooler according to an embodiment of this application is shown.

[0034] Figure 4 A schematic diagram of the plates in a novel plate-type evaporative air cooler according to an embodiment of this application is shown;

[0035] Figure 5 A schematic diagram of wastewater treatment in a novel plate-type evaporative air cooler according to an embodiment of this application is shown. Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0037] The reference numerals in the accompanying drawings include: 1. Air duct; 2. Fan; 3. First water collector; 4. Heat exchanger body; 401. Heat exchanger plate bundle; 402. Inlet pipe box; 403. Outlet pipe box; 404. Valve; 5. Spraying device; 6. Water tank; 7. Water pump; 8. Cleaning platform; 9. Second water collector; 10. Packing rack; 11. Air inlet louver; 12. Air inlet grille; 13. Walkway; 14. Dosing device; 15. Water quality monitoring equipment; 16. Side-stream filtration system; 17. Hydraulic pump; 18. Heat exchanger; 19. Air inlet zone a; 20. Air outlet zone b; 31. Spraying zone c; 42. Plate heat exchange zone d; 43. Auxiliary heat exchange zone e; 44. Water storage zone f.

[0038] A novel plate-type evaporative air cooler, implementing, for example... Figure 1 As shown: It includes a shell, an air inlet zone (a), an air outlet zone (b), a spray zone (c), a plate heat exchange zone (d), an auxiliary heat exchange zone (e), and a water storage zone (f) all located on the shell. Details are as follows:

[0039] Air intake zone a: Air intake zone a is symmetrically located on both sides of the top of the shell, including air intake grilles 12 and walkways 13 on the surface of the shell. Baffles are provided at the peripheral edges of air intake zone a, such as... Figure 2 As shown, both the air intake grille 12 and the walkway 13 are provided with through holes with a diamond or rectangular cross-section; the air intake grille 12 and the walkway 13 are each composed of several identical components, which can be flexibly disassembled and installed during equipment cleaning and maintenance; air enters the housing through the through holes on the air intake grille 12 and the walkway 13. The air intake grille 12 mainly blocks leaves or other large-area materials in the incoming air, and workers can stand on the walkway 13 to directly remove the materials blocked by the air intake grille 12.

[0040] Air outlet zone b: includes at least two symmetrically arranged air ducts 1 on the top surface of the casing, fans 2 installed in each air duct 1, and first water collectors 3 located directly below each fan 2. A cavity is formed inside the casing to connect the air inlet zone a and the air outlet zone b; the air ducts 1 are used to raise the air outlet so that the air outlet is higher than the air inlet zone a to prevent hot air circulation; the fans 2 promote air circulation; the first water collectors 3 block small water droplets in the humid air after heat exchange.

[0041] Spraying zone c: Located on both sides of the shell and directly above the plate heat exchange zone d. Spraying device 5 is provided in spraying zone c. Spraying device 5 includes a spray water transport pipe and several nozzles installed on the spray water transport pipe. The spray water transport pipe serves as the transport component for spray water, and a water pump 7 is installed on it to provide spray water for the equipment to operate.

[0042] Plate heat exchange zone d: includes heat exchange body 4 located at the center of both sides of the shell. Heat exchange body 4 includes multiple identical plate heat exchange units, such as... Figure 3 As shown, each plate heat exchanger unit includes a heat exchange plate bundle 401, an inlet pipe box 402 and an outlet pipe box 403 connected to both ends of the heat exchange plate bundle 401, and an inlet flange and an outlet flange respectively installed on the inlet pipe box 402 and the outlet pipe box 403. The heat exchange body 4 is connected to the medium inlet and outlet pipelines through the inlet flange and the outlet flange in the form of flexible connection. Valves 404 are installed on the medium inlet and outlet pipelines respectively. The operation and isolation of the equipment are controlled by the opening and closing of the valves 404, thereby realizing the modularization of the heat exchange body 4 and facilitating the cleaning and maintenance of the equipment.

[0043] The heat exchange plate bundle 401 includes one or more pairs of equidistantly distributed plates. Each plate pair forms a heat exchange medium flow channel, and adjacent plate pairs form cooling medium flow channels for sprayed water and air. Figure 4As shown, the plate pair consists of two symmetrically arranged plates with uniformly arranged raised or concave textures on the surface of the plates. This increases the heat exchange area and makes it easier for the fluid to form turbulence, thereby improving its surface heat transfer coefficient. Furthermore, the permeable arrangement ensures that the formed water film is continuous and uniform. A heat exchange medium flow channel is formed between the two plates. The cross-section of the heat exchange medium flow channel can be any one of hexagonal, elliptical, teardrop, or rectangular shapes. A turbulence zone is provided in the cooling medium flow channel to ensure full contact between the sprayed water and air. The heat exchange body 4 is the place where the heat exchange of hot and cold media takes place. The hot medium flows inside the plate pair, while sprayed water and air flow between the plate pairs. Some of the sprayed water will evaporate and absorb a large amount of heat, thereby completing the cooling / condensation of the hot medium.

[0044] The design employs a pair of plates that work in conjunction with the inlet pipe box 402 and the outlet pipe box 403, presenting a modular design in which the plate pairs, inlet pipe box 402, and outlet pipe box 403 correspond to each other. This makes it easier for staff to disassemble and clean the plates that have accumulated scale.

[0045] The outer cover plate surrounding the heat exchange body 4 is detachably connected to the shell by bolts, and a cleaning platform 8 is provided below the heat exchange body 4 to facilitate the removal of the outer cover plate by personnel, and to directly use a high-pressure water gun on the cleaning platform 8 to wash away the scale on the heat exchange body 4. The plate heat exchange units of the heat exchange body 4 are installed horizontally or at an angle, and when installed at an angle, the inlet end of the plate heat exchange unit is higher than the outlet end, with an inclination angle of 1°-3°; each plate heat exchange unit is installed, operated, and isolated independently, and can be removed individually when needed.

[0046] Auxiliary heat exchange zone e: Located directly below the plate heat exchange zone d, auxiliary heat exchange zone e employs any one of the following heat exchange methods: packing frame 10, bubbling heat exchange, or air heat exchange. A second water collector 9 is installed at the junction of auxiliary heat exchange zone e and air outlet zone b. An air inlet louver 11 is installed on the shell corresponding to auxiliary heat exchange zone e, and a grille to block foreign objects is installed inside the air inlet louver 11. When using packing frame 10 for heat exchange, an additional packing frame 10 is installed in auxiliary heat exchange zone e. The packing frame 10 increases the contact area between air and spray water, and introduces air to cause some of the spray water to evaporate again, reducing the temperature of the spray water. At the same time, some compounds precipitate and adhere to the packing frame 10. After scaling, the packing frame 10 can be removed for direct physical descaling or directly replaced.

[0047] Water storage area f: Located directly below auxiliary heat exchange area e, water storage area f includes a water tank 6 arranged below auxiliary heat exchange area e, and a water pump 7 located outside the shell and connected to the water tank 6 via a pipe. The water tank 6 is used to temporarily store the remaining spray water, and its surface is also equipped with a water inlet, an overflow outlet, and a drain outlet, used to replenish spray water, control the water level in the water tank 6, and promptly remove spray water with a certain ion concentration, respectively. The water pump 7 is installed outside the water tank 6 and is used to deliver the spray water in the water tank 6 to the spray water transport pipeline.

[0048] In the operation of this utility model, the water pump 7 sprays the spray water from the spray water transport pipe and nozzle to the plate heat exchange zone d, where the spray water forms a continuous and uniform water film on the outer surface of the plate. The fan 2 drives the air to flow, causing some air to flow between the formed water film. The plates flow with the internal heat medium for cross-flow heat exchange, the medium inside the heat exchange body 4 cools or condenses, and the spray water outside the heat exchange body 4 evaporates, and the spray water-air temperature rises, thus completing the heat exchange. After heat exchange, the spray water enters the packing frame 10 and comes into contact with another part of the air for secondary evaporation heat exchange, thereby improving the overall heat exchange capacity of the equipment. At the same time, some compounds precipitate out, reducing scaling on the heat exchange body 4.

[0049] In this embodiment, the wastewater generated during the heat exchange process is treated using methods such as... Figure 4 The treatment system shown is used for wastewater treatment. Wastewater is drawn by hydraulic pump 17 and fed directly into the bypass filtration system 16 through a valve or through heat exchanger 18, depending on the temperature. At the same time, a dosing device 14 supplies bactericides, algaecides, corrosion inhibitors and scale inhibitors to the bypass filtration system 16, and water quality monitoring equipment 15 is configured to monitor the water quality.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A novel plate-type evaporative air cooler, characterized in that, include: case; An air inlet area is located on both sides of the top surface of the shell, and an air outlet area is located in the middle of the top surface of the shell. A cavity is formed inside the shell that connects the air inlet area and the air outlet area. The plate heat exchange zone, located directly below the air inlet area and in the middle of the shell, includes several plate heat exchange units; The spray zone is located between the air inlet zone and the plate heat exchange zone, and the spray zone is equipped with a spray device to spray the plate heat exchange zone. The auxiliary heat exchange area is located directly below the plate heat exchange area; The water storage area is located directly below the auxiliary heat exchange zone.

2. A novel plate-type evaporative air cooler according to claim 1, characterized in that, The air intake area includes an air intake grille and a walkway on the surface of the housing. Both the air intake grille and the walkway are provided with several through holes that communicate with the cavities inside the housing. The air outlet area includes several air ducts on the upper surface of the shell, fans respectively installed in the air ducts, and first water collectors respectively located below the fans. The highest height of the air ducts is higher than the highest height of the air inlet area.

3. A novel plate-type evaporative air cooler according to claim 2, characterized in that, Each air inlet zone is equipped with a baffle at its perimeter edge, and a cleaning platform is provided between the plate heat exchange zone and the auxiliary heat exchange zone.

4. A novel plate-type evaporative air cooler according to any one of claims 1 to 3, characterized in that, The auxiliary heat exchange zone can be any one of packing rack heat exchange, bubbling heat exchange or air heat exchange. The packing rack heat exchange includes a packing rack located below the plate heat exchange zone and a second water collector located at the junction of the auxiliary heat exchange zone and the air outlet zone.

5. A novel plate-type evaporative air cooler according to claim 1, characterized in that, The plate heat exchange unit includes a heat exchange plate bundle located below the spray zone, an inlet pipe box and an outlet pipe box respectively connected to both ends of the heat exchange plate bundle, and an inlet flange and an outlet flange respectively installed on the inlet pipe box and the outlet pipe box.

6. A novel plate-type evaporative air cooler according to claim 5, characterized in that, The heat exchange plate bundle includes one or more pairs of equidistantly distributed plates. Each plate pair forms a heat exchange medium flow channel, and adjacent plate pairs form cooling medium flow channels for spraying water and air.

7. A novel plate-type evaporative air cooler according to claim 6, characterized in that, The cooling medium flow channel is equipped with a turbulence zone.

8. A novel plate-type evaporative air cooler according to claim 7, characterized in that, The plate pair includes two plates arranged symmetrically or asymmetrically. The surface of the plates is uniformly covered with raised or recessed textures. A heat exchange medium flow channel is formed between the two plates. The cross-section of the heat exchange medium flow channel is any one of hexagonal, elliptical, teardrop, or rectangular shapes.

9. A novel plate-type evaporative air cooler according to any one of claims 6-8, characterized in that, Each of the plate heat exchange units is installed horizontally or at an incline. When installed at an incline, the inlet end of the plate heat exchange unit is higher than the outlet end and has an incline angle of 1°-3°.

10. A novel plate-type evaporative air cooler according to claim 9, characterized in that, It also includes hydraulic pumps for extracting wastewater, a side-filtration system for treating wastewater, a dosing device for adding chemicals to the side-filtration system, and water quality monitoring equipment for detecting the water quality of the side-filtration system.

Images