A composite mixed flow air cooler with a peak device

Abstract

The present invention relates to the technical field of heat exchange equipment, and specifically discloses a composite mixed flow air cooler with a peak device, comprising: a shell, an induced draft fan, a medium transfer pipe, a water supply pipe, a regulating valve 1, a water supply tee, a regulating valve 2, a cooling filler, an evaporating coil, an evaporating coil regulating air inlet window, a cooling filler regulating air inlet window, an air cooler regulating air inlet window, a medium inlet, a circulating water tank, an air cooler, a mist bed, an air mixing chamber, a cooling filler water distribution device, an evaporating coil water distribution device, a medium outlet, and a water collector. The present invention has multiple operating modes, such as a peak operating mode, a summer operating mode, a spring and autumn combined operating mode, a water-off operating mode, and an antifreeze mode, which can meet different usage scenarios. In addition, the invention has unique mixed flow drip cooling and condensation technology and condensation recovery and reheating technology, achieving multiple functions of water saving, energy saving, and white mist elimination.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange equipment, and in particular relates to a composite mixed flow air cooler with a spike device. Background Art

[0002] With the development of industrial technology and the increasing requirements for equipment performance in various industries, the importance of cooling condensing devices in many fields has become increasingly prominent. Traditional open and closed cooling systems each have their own advantages and disadvantages, and it is difficult to meet the needs of complex working conditions. In an open cooling system, the circulating water directly exchanges heat with the external environment, which has a strong cooling capacity and low cost, but is easily contaminated, causing equipment corrosion and scaling, affecting equipment life and operating efficiency; the closed cooling system medium is cooled through a closed loop, which can avoid external pollution, but the heat dissipation efficiency is low and may not meet the heat exchange requirements in high temperature environments. In addition, both systems rely on water evaporation and heat absorption to remove heat, and industrial water consumption is huge. Water resources are non-renewable economic energy. Saving water in industrial production is crucial to sustainable development and also helps alleviate water shortages.

[0003] Common closed-loop cooling and condensing units include air coolers and evaporative cooling condensers. Air coolers use air as the cooling medium to cool or condense the process medium (heat flux) within the tubes to the desired temperature. In evaporative cooling condensers (abbreviated as evaporative cooling), the medium and air are not in direct contact. Instead, nozzles within the unit spray water onto the evaporating coils. Through evaporation and heat transfer from the sprayed water and the rising temperature of the air, the heat from the medium within the coils is transferred to the atmosphere.

[0004] Common evaporative cooling configurations include counterflow, co-current, and crossflow. Counterflow offers the highest heat transfer efficiency, but is affected by the ambient wet-bulb temperature. In southern China, where wet-bulb temperatures are high, counterflow requires a larger heat exchange area, leading to the emergence of co-current and cross-flow evaporative cooling.

[0005] like Figure 1 As shown, the evaporator coil of the downstream evaporative cooling system is located above the packing. The spray water in the water tank is transported to the nozzle above the evaporator coil by the spray water pump and evenly sprayed on the evaporator coil wall. After spraying, the spray water rises in temperature due to evaporation and heat transfer, and falls into the cooling packing under the action of gravity. After the packing cools down, it falls back into the water tank, and the cycle repeats. However, this structure has obvious disadvantages:

[0006] Disadvantage 1: The air inlet and outlet are both located at the upper part of the equipment and are adjacent to each other. Under the influence of natural crosswind, the hot and humid air at the fan outlet is easy to flow back to the air inlet, affecting the heat exchange effect of the evaporating coil.

[0007] Disadvantage 2: The evaporator coil is the main heat exchange component, with its air inlet located on the upper part of the coil and the air outlet located on the side of the coil and close to the fan. There is a dead zone in the air flow path, which affects the heat exchange effect.

[0008] Disadvantage 3: The evaporating coil and the cooling filler share a fan, and the static pressure loss and headwind speed of the two are different, so they cannot achieve the optimal headwind speed and air volume required for their respective heat exchange.

[0009] Disadvantage 4: The evaporating coil and the cooling filler share a spraying system. During seasons other than peak seasons, the cooling filler area always has spray water being cooled and evaporated, resulting in a waste of spray water.

[0010] Disadvantage 5: The cooling packing is prone to salt and scaling, which can clog and degrade performance. Because the cooling packing is a shared spray system, spray water flows from top to bottom through the evaporator coil and cooling packing. Repairing or cleaning the cooling packing requires the entire unit to be shut down, impacting production operations.

[0011] Disadvantage 6: It cannot be run dry without water. The windward side of the cooling filler is more likely to ice and crack when running in winter.

[0012] Disadvantage 7: The machine cannot be shut down for dry operation. When running in winter, due to the low ambient temperature, there will be serious white fog at the fan outlet, causing corrosion of surrounding equipment, ice hanging and environmental pollution.

[0013] Crossflow evaporative cooling uses an alternating arrangement of evaporating coils and cooling packing (one layer of coils per layer of packing), sharing a common fan and sprinkler system. This also presents the last five drawbacks mentioned above. Furthermore, the air inlet is located on the side of the unit, while the air outlet is located at the top. Due to the height of the unit, the wind speed and air volume facing each layer of coils and packing vary, preventing optimal heat exchange between the evaporating coils and cooling packing. Summary of the Invention

[0014] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a composite mixed flow air cooler with a peak device, which has multiple functions such as peak operation mode, summer operation mode, spring and autumn combined operation mode, water outage operation mode, anti-freeze mode, etc., thereby solving the background technology problems.

[0015] The present invention provides the following technical solutions:

[0016] A composite mixed flow air cooler with a spike device comprises a shell, a medium circulation system and an air handling system;

[0017] The medium circulation system comprises an air cooler and an evaporation coil connected in series, and the medium flows between the two through a medium transfer tube;

[0018] The air handling system includes independently controlled cooling filler and evaporator coil air inlet window groups, wherein the air inlet window group includes cooling filler adjustment air inlet window, evaporator coil adjustment air inlet window and air cooler adjustment air inlet window;

[0019] Adjust the opening and closing combination of the air inlet window group to realize the switching of peak operation mode, summer operation mode, spring and autumn combined operation mode, water outage operation mode and anti-freeze mode.

[0020] Preferably, the air cooler and the evaporating coil are connected in series through a medium transfer tube, and the medium first flows through the air cooler and then enters the evaporating coil; the spraying system of the cooling filler and the evaporating coil is arranged in parallel through a water supply tee, the cooling filler spraying system is controlled by regulating valve 1, and the spraying system of the evaporating coil is controlled by regulating valve 2.

[0021] Preferably, the cooling filler adjustment air inlet window and the evaporating coil adjustment air inlet window are respectively located on the sides of the cooling filler and the evaporating coil; the air cooler adjustment air inlet window is located on the side of the air mixing chamber, and all three are adjustable air inlet windows and are controlled manually, pneumatically or electrically.

[0022] Preferably, a water collector is provided on one side of the evaporating coil, and a mist bed is provided under the air cooler; in the spring and autumn joint operation mode, the hot and humid air is initially dehydrated by the water collector, and then mixed with the new cold air introduced through the air inlet window of the air cooler for condensation in the air mixing chamber, and then further dehydrated by the "mist bed", and finally discharged after being heated by the air cooler.

[0023] Preferably, in antifreeze mode, all air inlet windows are closed, the induced draft fan of the air cooler is stopped, the circulating water pump is turned off, the spray water is drained, and the internal temperature is maintained by the residual heat of the air cooler and the evaporating coil.

[0024] Preferably, the cooling filler is a cross-flow filler, and the material is PVC, fiberglass or stainless steel; the evaporating coil is a counter-flow coil, and the heat exchange component is a tube, plate or tube-fin structure.

[0025] Preferably, the heat exchange area of ​​the air cooler is 0.01-10 times that of the evaporating coil, and the air volume distribution is achieved by adjusting the opening of the air inlet window; the induced draft fan adjusts its operating state or frequency according to the ambient temperature or the medium outlet temperature.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention provides a composite mixed-flow air cooler with a peaking device, combining the advantages of both open and closed systems. The cooling packing acts only as a peaking device, shaving peak loads during extreme summer weather. It is shut down during off-peak seasons, reducing spray water evaporation and conserving water, while avoiding inappropriate use of the cooling packing in spring, autumn, and winter. The closed system's internal media is less susceptible to contamination, ensuring safe operation of the system equipment.

[0028] It combines the advantages of both air cooling and wet cooling. In summer, the air cooler acts as a supplementary heat exchanger, removing some of the heat load and reducing water consumption in the evaporator coil. In spring and autumn, the two operate together, with the air cooler removing more heat load and further reducing the evaporator coil's spray water consumption. In winter, the air cooler acts as the primary heat exchanger, removing the majority of the heat, allowing the evaporator coil to operate without water. In summer, the evaporator coil's heat exchange performance is superior to that of the air cooler. As the ambient temperature drops, the air cooler's heat exchange performance gradually becomes superior, with the two complementing each other year-round.

[0029] Unique mixed-flow drip-flow cooling condensation technology. The dry, cool fresh air is low in temperature and relative humidity, creating a countercurrent flow with the evaporating coil medium, resulting in high heat exchange efficiency. The spray water flows through the evaporating coil's water distribution device in a drip-flow pattern, creating a more uniform spray film and improving heat exchange efficiency.

[0030] Unique condensate recovery and reheating technology. In the combined spring and autumn operation mode, fresh cold air is introduced through the air cooler's adjustable air inlet window. Saturated hot and humid air at the evaporator coil outlet is partially condensed with it in the air mixing chamber, and the mist bed recovers the condensed water. The partially condensed wet air is heated by the air cooler before being discharged, raising its temperature and keeping it away from the 100% relative humidity line, thus reducing the generation of white fog.

[0031] After the humid hot air at the outlet of the evaporating coil is heated by the air cooler, its temperature increases and its density decreases. After being discharged from the equipment by the fan, it is not easy to produce white mist and humid hot air backflow.

[0032] The optimal oncoming wind speed and air volume required for heat exchange between the cooling filler and the evaporating coil can be adjusted by adjusting the air inlet window of the cooling filler and the air inlet window of the evaporating coil.

[0033] The cooling filler is shut down during the non-peak season, so there is ample time for inspection, cleaning and maintenance, with little impact on normal production operations.

[0034] The high-temperature medium first passes through the air cooler to remove part of the heat, and the medium-temperature medium enters the evaporator coil to continue cooling or condensing, which can reduce the spray water temperature, enhance the heat exchange capacity of the evaporator coil, and slow down the salting, scaling and corrosion of the evaporator coil.

[0035] The evaporator coil is located at the bottom of the unit, making leak repair, repair, and maintenance easy. It can operate without water, reducing the risk of ice buildup and cracking on the cooling packing and evaporator coil. An anti-freeze mode ensures the unit survives the winter smoothly. This multi-purpose unit offers multiple functions to meet diverse usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a schematic diagram of a typical downstream cooling tower structure in the prior art.

[0038] Figure 2 The figure is a side view of a composite mixed flow air cooler with a spike device according to the present invention.

[0039] Figure 3 This is a schematic diagram of the peak operation mode of a composite mixed flow air cooler with a peak device according to the present invention.

[0040] Figure 4 This is a schematic diagram of the summer operation mode of a composite mixed flow air cooler with a peak device according to the present invention.

[0041] Figure 5 This is a schematic diagram of the spring and autumn combined operation mode of a composite mixed flow air cooler with a peak device according to the present invention.

[0042] Figure 6 This is a schematic diagram of the water-off operation mode of a composite mixed-flow air cooler with a peak device according to the present invention.

[0043] Figure 7 This is a schematic diagram of the antifreeze mode of a composite mixed flow air cooler with a spike device according to the present invention.

[0044] Figure 8 This is the thermodynamic state diagram of the condensation recovery and reheating technology of the present invention.

[0045] The names corresponding to the marks in the figure are:

[0046] 1. Shell; 2. Induced draft fan; 3. Medium transfer pipe; 4. Water supply pipe; 5. Regulating valve 1; 6. Water supply tee; 7. Regulating valve 2; 8. Cooling packing; 9. Evaporating coil; 10. Evaporating coil regulating air inlet window; 11. Cooling packing regulating air inlet window; 12. Air cooler regulating air inlet window; 13. Medium inlet; 14. Circulating water tank; 15. Air cooler; 16. Fogging bed; 17. Air mixing chamber; 18. Cooling packing water distribution device; 19. Evaporating coil water distribution device; 20. Medium outlet; 21. Water collector. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0049] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] A composite mixed-flow air cooler with a peak device comprises a shell 1, a medium circulation system and an air handling system; the medium circulation system comprises an air cooler 15 and an evaporating coil 9 connected in series, and the medium circulates between the two through a medium transfer tube 3; the air handling system comprises an independently controlled cooling filler 8 and an evaporating coil 9 air inlet window group, the air inlet window group comprising a cooling filler adjustment air inlet window 11, an evaporating coil adjustment air inlet window 10 and an air cooler adjustment air inlet window 12; the opening and closing combination of the air inlet window group is adjusted to realize switching between peak operation mode, summer operation mode, spring and autumn combined operation mode, water-off operation mode and antifreeze mode.

[0051] The air cooler 15 and the evaporating coil 9 are connected in series through the medium transfer tube 3, and the medium first flows through the air cooler 15 and then enters the evaporating coil 9; the spraying system of the cooling filler 8 and the evaporating coil 9 is arranged in parallel through the water supply tee 6, the cooling filler spraying system is controlled by the regulating valve 1 5, and the spraying system of the evaporating coil 9 is controlled by the regulating valve 2 7.

[0052] The cooling filler adjustment air inlet window 11 and the evaporating coil adjustment air inlet window 10 are respectively located on the sides of the cooling filler 8 and the evaporating coil 9; the air cooler adjustment air inlet window 12 is located on the side of the air mixing chamber 17. All three are adjustable air inlet windows and are controlled manually, pneumatically or electrically.

[0053] A water collector 21 is provided at the outlet of the evaporating coil 9, and a mist bed 16 is provided below. In the spring and autumn combined operation mode, the hot and humid air is initially dehydrated by the water collector 21, and then mixed with the new cold air introduced through the air cooler regulating air inlet window 12 in the air mixing chamber 17 for condensation, and then heated by the air cooler 15 before being discharged.

[0054] In antifreeze mode, all air inlet windows are closed, the induced draft fan 2 of the air cooler is stopped, the circulating water pump is turned off, the spray water is drained, and the internal temperature is maintained by the residual heat of the air cooler 15 and the evaporation coil 9.

[0055] In actual operation, the induced draft fan is adjusted by a variable frequency fan. The equipment may be larger and may be equipped with multiple variable frequency or industrial frequency motors. The function of stabilizing the medium outlet temperature is achieved by adjusting the operating status of the industrial frequency motor and the speed of the variable frequency motor.

[0056] The cooling packing 8 is a cross-flow packing made of PVC, fiberglass, or stainless steel. The evaporating coil 9 is a counter-flow coil, and the heat exchange components are tubular, plate, or tube-and-fin structures. The heat exchange area of ​​the air cooler 15 is 0.01-10 times that of the evaporating coil 9, and air volume distribution is achieved by adjusting the air inlet window opening. The induced draft fan 2 adjusts its operating state and frequency based on the ambient temperature or the medium outlet temperature.

[0057] Combine Figure 2 、 Figure 3 The structure of the present invention is described as follows: a composite mixed flow air cooler with a peak device includes a shell 1, an induced draft fan 2, a medium transfer pipe 3, a water supply pipe 4, a regulating valve 1 5, a water supply tee 6, a regulating valve 2 7, a cooling filler 8, an evaporating coil 9, an evaporating coil regulating air inlet window 10, a cooling filler regulating air inlet window 11, an air cooler regulating air inlet window 12, a medium inlet 13, a circulating water tank 14, an air cooler 15, a mist bed 16, an air mixing chamber 17, a cooling filler water distribution device 18, an evaporating coil water distribution device 19, a medium outlet 20, and a water collector 21. Figure 2 and Figure 3 As shown, the top of the shell 1 is provided with an induced draft fan 2 and a cooling filler water distribution device 18, and the bottom is provided with a circulating water tank 14. Figure 3 As shown, between the cooling filler water distribution device 18 and the circulating water tank 14, from top to bottom are the cooling filler 8, the evaporating coil water distribution device 19, and the evaporating coil 9. Figure 3As shown, a cooling filler regulating air inlet window 11 is provided on the side of the cooling filler 8, and an evaporating coil regulating air inlet window 10 is provided on the side of the evaporating coil 9. Figure 2 As shown, the cooling filler regulating air inlet window 11 and the evaporating coil regulating air inlet window 10 are respectively fixed on the housing 1. Figure 2 As shown, the cooling packing water distribution device 18 and the evaporating coil water distribution device 19 are connected to the circulating water tank 14 through the spray water pump and the water supply pipe 4 to form a spray circuit. The two are connected in parallel through the water supply tee 6, regulating valve 1 5 and regulating valve 2 7 on the water supply pipe 4. Figure 3 As shown, the lower part of the induced draft fan 2 is composed of an air cooler 15, a mist bed 16, and an air mixing chamber 17 from top to bottom. An air cooler regulating air inlet window 12 is provided on the side of the air mixing chamber 17, and a water collector 21 is provided at the air outlet of the evaporating coil 9. Figure 2 、 Figure 3 As shown, the air cooler 15 and the evaporation coil 9 are connected in series through the medium transfer pipe 3. The medium enters the air cooler 15 through the medium inlet 13 to be cooled or condensed, then enters the evaporation coil 9 through the medium transfer pipe 3 to continue to be cooled or condensed, and is finally discharged from the medium outlet 20.

[0058] As an implementable method, the operation mode is: combined with Figure 2 、 Figure 3The present invention's peak operating mode is described below: During peak operating mode for a composite mixed-flow air cooler with a peaking device, the evaporator coil regulating air inlet window 10 and the cooling packing regulating air inlet window 11 are open, while the air cooler regulating air inlet window 12 is closed. Under the action of induced draft fan 2, air passes through cooling packing 8 and evaporator coil 9, then mixes in air mixing chamber 17. The low-temperature mixed air then passes through air cooler 15 before being discharged into the atmosphere by induced draft fan 2. Regulating valve 1 5 is opened, regulating valve 2 7 is closed, and the spray water in the circulating water tank 14 is pumped to the cooling packing water distribution device 18 via a circulating water pump. Under the action of gravity, the spray water flows from top to bottom through the cooling packing 8, the evaporator coil water distribution device 19, and the evaporator coil 9, before returning to the circulating water tank 14 for circulation. After the spray water evaporates and cools after passing through cooling packing 8, it falls to the evaporator coil water distribution device 19 for secondary redistribution and redistribution. The holes in the evaporator coil water distribution device 19 form a droplet-like spray stream. The droplet-like spray water, cooled by cooling packing 8, forms a uniform water film on the heat exchange tube surfaces of the evaporator coil 9. On the one hand, the low-temperature mixed air formed by the mixing chamber 17 of the cooling packing 8 and the evaporator coil 9 is used by the air cooler 15 for heat exchange, thereby reducing the heat load on the evaporator coil 9 and the amount of spray evaporation water, thus saving water. On the other hand, the medium is partially cooled or condensed by the air cooler 15, resulting in a low temperature entering the evaporator coil 9, and thus the spray water temperature. Furthermore, the cooling packing 8 acts as a peak-shaving device, further reducing the spray water temperature and increasing the temperature difference between the spray water and the medium in the evaporator coil 9. This significantly improves the heat exchange efficiency of the evaporator coil 9 in extreme summer weather, thus achieving a peak-shaving effect.

[0059] As an implementable method, Figure 2 、 Figure 4 The present invention's summer operating mode is described below: During the summer operating mode of a composite mixed-flow air cooler with a peaking device, the evaporator coil regulating air inlet window 10 is open, while the cooling packing regulating air inlet window 11 and the air cooler regulating air inlet window 12 are closed. Under the action of the induced draft fan 2, air passes through the evaporator coil 9 and the water collector 21. The low-temperature air then passes through the air cooler 15 before being discharged into the atmosphere by the induced draft fan 2. Regulating valve 1 5 is closed, regulating valve 2 7 is opened, and the spray water in the circulating water tank 14 is transported to the evaporator coil water distribution device 19 via the circulating water pump. The holes in the evaporator coil water distribution device 19 form a droplet spray, which forms a uniform water film on the heat exchange tube surface of the evaporator coil 9. In the summer operating mode, the cooling packing 8 is in a shutdown state, while the evaporator coil 9 and air cooler 15 are in operation, providing ample time for inspection, cleaning, and maintenance of the cooling packing 8. The low-temperature air at the outlet of the evaporation coil 9 is used by the air cooler 15 for heat exchange, and the heat load of the evaporation coil 9 is reduced accordingly, and the amount of spray evaporation water is reduced, which plays a role in water saving.

[0060] As an implementable method, Figure 2 、 Figure 5 The present invention's combined spring and autumn operation mode is described below: During the combined spring and autumn operation mode of a composite mixed-flow air cooler with a peaking device, the evaporator coil regulating air inlet window 10 and the air cooler regulating air inlet window 12 are open, while the cooling packing regulating air inlet window 11 is closed. Under the action of the induced draft fan 2, air passes through the evaporator coil 9 and the air cooler regulating air inlet window 12. After mixing in the air mixing chamber 17, the low-temperature mixed air then passes through the air cooler 15 before being discharged into the atmosphere by the induced draft fan 2. Regulating valve 1 5 is closed, regulating valve 2 7 is opened, and the spray water in the circulating water tank 14 is transported to the evaporator coil water distribution device 19 via the circulating water pump. The holes in the evaporator coil water distribution device 19 form a droplet spray, which forms a uniform water film on the heat exchange tube surface of the evaporator coil 9. This mode can be used when the ambient temperature is low in spring and autumn, and when the ambient temperature is lower than the outlet air temperature of the evaporator coil 9. Taking the transition from summer to winter as an example, as the ambient temperature drops, the air cooler's adjustable air inlet window 12 gradually opens, the entire machine's heat load gradually shifts to the air cooler 15, and the heat load on the evaporator coil 9 decreases. On the one hand, the heat load required to be removed by the evaporator coil 9 is reduced. On the other hand, due to the opening of the air cooler's adjustable air inlet window 12, the wind speed and air volume facing the evaporator coil 9 are low, and the evaporation, drift, and sewage consumption of the spray water are also reduced, achieving the optimal water-saving effect in spring and autumn. On the other hand, due to the gradual opening of the air cooler's adjustable air inlet window 12, the pressure drop of the entire machine decreases, and the energy consumption of the equipment is also reduced. Based on the heat exchange area selected for the air cooler 15 and the evaporator coil 9, as the ambient temperature continues to drop, the cooling filler adjustable air inlet window 11 can also be opened. At this time, the entire machine consumes the least water and energy in the spring and autumn combined operation mode.

[0061] As an implementable method, Figure 2 、 Figure 6 The present invention describes the water-off mode: During the water-off mode of a composite mixed-flow air cooler with a peaking device, the evaporator coil regulating air inlet window 10, the cooling filler regulating air inlet window 11, and the air cooler regulating air inlet window 12 are open. Under the action of the induced draft fan 2, air passes through the evaporator coil 9, the cooling filler 8, and the air cooler regulating air inlet window 12. After mixing in the air mixing chamber 17, the low-temperature mixed air then passes through the air cooler 15 before being discharged into the atmosphere by the induced draft fan 2. This mode is activated after the water-off temperature is reached. At this point, the required medium outlet temperature is maintained by running the air cooler 15 and evaporator coil 9 dry. The air cooler 15 serves as the primary heat exchange unit, while the evaporator coil 9 serves as an auxiliary heat exchange unit. Since the cooling filler regulating air inlet window 11 and the air cooler regulating air inlet window 12 are open, the overall pressure drop and energy consumption are minimized. Furthermore, as the ambient temperature decreases, fan energy consumption decreases. Furthermore, the water-off mode eliminates spray water consumption, achieving a win-win situation of energy and water conservation.

[0062] As an implementable method, Figure 2 、 Figure 7 The present invention's antifreeze mode is described below: In antifreeze mode for a composite mixed-flow air cooler with a spike device, the evaporator coil regulating inlet window 10, the cooling packing regulating inlet window 11, and the air cooler regulating inlet window 12 are closed, the induced draft fan 2 is deactivated, the circulating water pump is turned off, and the spray water in the circulating water tank 14 is drained. The device can be removed from the system via a bypass. During this time, the media within the device must be drained. The media can also flow through the device's air cooler 15, the media transfer tube 3, and the evaporator coil 9, allowing the device to participate in system operation. Since the relevant inlet windows are closed, the induced draft fan 2 does not generate draft force. Meanwhile, the media in the air cooler 15 and evaporator coil 9 retains heat, creating a warm room inside the device, which helps prevent freezing.

[0063] Mixed flow drip cooling condensation technology description: Now combined with Figure 3 The mixed-flow droplet cooling condensation technology of the present invention is described as follows: the medium of a mixed-flow air cooler with a spike device enters the evaporator coil 9 through the medium transfer pipe 3 and is finally discharged from the medium outlet 20. The overall flow direction of the medium is from left to right. Fresh cold air enters the evaporator coil 9 through the evaporator coil adjustment air inlet window 10, flowing from right to left, forming a countercurrent sensible heat exchange with the medium. The fresh cold air has low temperature and relative humidity, and heat exchanges with the heat exchange unit on the medium outlet side, enhancing the heat exchange of the medium terminal temperature. Spray water is sprayed in a droplet flow from the holes in the evaporator coil water distribution device 19. The droplet spray droplets drip from top to bottom to the heat exchange units on each layer of the evaporator coil 9, forming a cross flow pattern with the medium and air. On the one hand, the dripping spray droplets continuously impact the heat exchange unit of the evaporating coil 9, forming numerous tiny turbulent interfaces, enhancing heat transfer between the spray water and the heat exchange unit and reducing the likelihood of dirt and impurities adhering. On the other hand, the droplets come into more complete contact with the air, increasing the evaporation rate and improving the heat exchange efficiency of the evaporating coil 9. By controlling the liquid level, hole size, and hole spacing in the water distribution trough of the evaporating coil water distribution device 19, the spray water volume, uniformity, and droplet size are all within controllable ranges, avoiding the shortcomings of the prior art, such as uneven spraying, dry spots, and drifting spray, caused by the extensive spraying method of the nozzle.

[0064] The structural arrangement of the evaporation coil 9 can be adjusted to different forms due to factors such as the cooling and condensation of the working medium in the tube and anti-freezing during shutdown.

[0065] Condensate recovery and reheating technology description: Now combined with Figure 5 、 Figure 8The condensation recovery and reheating technology of the present invention is described. The present invention relates to a composite mixed flow air cooler with a peak device. When the ambient temperature is lower than the outlet air temperature of the evaporating coil 9, the spring and autumn combined operation mode is executed. The spray water evaporates on the heat exchange wall of the evaporating coil 9 and absorbs the heat of the medium. The air temperature rises and the relative humidity increases. After the small droplets in the air are collected by the water collector 21, the relative humidity of the air out of the water collector 21 is close to 100%. At this time, the ambient temperature is lower than the hot and humid air temperature out of the water collector 21. Figure 8 The thermodynamic state of the hot and humid air at the outlet of the evaporating coil 9 is point A. The ambient fresh cold air enters the air mixing chamber 17 through the air cooler regulating air inlet window 12. The hot and humid air at the outlet of the evaporating coil 9 is mixed with the fresh cold air and condensed. Figure 8 It can be seen that the hot and humid air at the outlet of the evaporating coil 9 is continuously cooled and condensed along the 100% relative humidity line, and condensed water is precipitated to point B. In the figure, △T is the temperature drop of the hot and humid air at the outlet of the evaporating coil 9 after the mixed air condensation, and △D is the amount of condensed water precipitated after the mixed air condensation, that is, the secondary water saving. The precipitated low-temperature condensed water falls back to the circulating water tank 14 and continues to be used for spray circulation. Figure 5 The low-temperature saturated air after mixing is heated by the induced draft fan 2 and then discharged into the atmosphere through the air cooler 15. Figure 8 , its thermodynamic state point rises from point B to point C, the temperature rises, the relative humidity decreases, and it is far away from the 100% equal relative humidity line. The hot and humid air point C discharged into the atmosphere mixes with the dry and cold air point N of the environment (such as the line between point C and point N), which is not easy to intersect with the 100% equal relative humidity line, thereby playing the role of eliminating white fog. If the hot and humid air at the outlet of the evaporating coil 9 is not condensed, recovered and reheated, its thermodynamic state point is such as point A, and the line between point A and point N intersects with the 100% equal relative humidity line, and area W is the area where white fog is generated. When the ambient air temperature is lower and the relative humidity is higher, white fog is more likely to be generated. The condensation recovery and reheating technology of the present invention can effectively prevent the generation of white fog and recover part of the condensed water, thereby achieving the purpose of eliminating white fog and saving water.

[0066] Under the premise of not violating the principle of the present invention, the simplifications made are all within the scope of protection of the present invention. For example: canceling the air cooler, at the expense of the heat exchange and demisting functions of the air cooler; canceling the air cooler regulating air inlet window, at the expense of the fan energy consumption; canceling the evaporation coil water distribution device, at the expense of the cooling filler and the evaporation coil double-channel air distribution uniformity; canceling the water supply tee, regulating valve and evaporation coil water distribution device, at the expense of the peak function; canceling the adjustable opening function of the cooling filler regulating air inlet window and the evaporation coil regulating air inlet window, at the expense of the cooling filler and the evaporation coil. The changes are at the expense of the required optimal air volume (i.e. optimal heat exchange and water-saving performance); the adjustable opening function of the air cooler regulating air inlet window and the evaporating coil regulating air inlet window is cancelled, at the expense of the optimal air volume (i.e. optimal heat exchange and water-saving performance) required by the air cooler and the evaporating coil; the mist bed is cancelled, at the expense of the secondary water collection function and the function of avoiding corrosion of the air cooler; the cooling filler regulating air inlet window, the evaporating coil regulating air inlet window and the air cooler regulating air inlet window are cancelled, at the expense of the antifreeze function, etc.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A composite mixed flow air cooler with a spike device, characterized by: It includes a housing (1), a medium circulation system and an air handling system; The medium circulation system comprises an air cooler (15) and an evaporation coil (9) connected in series, and the medium circulates between the two through a medium transfer tube (3); The air handling system comprises an independently controlled cooling filler (8) and evaporating coil (9) air inlet window group, wherein the air inlet window group comprises a cooling filler regulating air inlet window (11), an evaporating coil regulating air inlet window (10) and an air cooler regulating air inlet window (12); Adjust the opening and closing combination of the air inlet window group to achieve switching between peak operation mode, summer operation mode, spring and autumn combined operation mode, water outage operation mode and anti-freeze mode; An induced draft fan (2) and a cooling filler water distribution device (18) are provided on the top of the shell (1), and a circulating water tank (14) is provided on the bottom; Between the cooling filler water distribution device (18) and the circulating water tank (14), from top to bottom, are the cooling filler (8), the evaporating coil water distribution device (19), and the evaporating coil (9); The spraying systems of the cooling filler (8) and the evaporating coil (9) are connected in parallel via the water supply tee (6), the cooling filler spraying system is controlled by regulating valve 1 (5), and the spraying system of the evaporating coil (9) is controlled by regulating valve 2 (7); A cooling filler regulating air inlet window (11) is provided on the side of the cooling filler (8), and an evaporating coil regulating air inlet window (10) is provided on the side of the evaporating coil (9); The lower part of the induced draft fan (2) is provided with an air cooler (15), a mist bed (16), and an air mixing chamber (17) from top to bottom. An air cooler regulating air inlet window (12) is provided on the side of the air mixing chamber (17); In the peak operation mode, the spray water in the circulating water tank (14) is transported to the cooling filler water distribution device (18) through the circulating water pump. Under the action of gravity, the spray water flows from top to bottom through the cooling filler (8), the evaporating coil water distribution device (19), the evaporating coil (9), and then falls back to the circulating water tank (14) for circulation.

2. A composite mixed flow air cooler with a spike device according to claim 1, characterized in that: The medium first flows through the air cooler (15) and then enters the evaporation coil (9).

3. The composite mixed flow air cooler with a spike device according to claim 1, characterized in that: The cooling filler regulating air inlet window (11), the evaporating coil regulating air inlet window (10) and the air cooler regulating air inlet window (12) are all adjustable air inlet windows and are controlled manually, pneumatically or electrically.

4. The composite mixed flow air cooler with a spike device according to claim 1, characterized in that: A water collector (21) is provided on one side of the evaporating coil (9), and a mist bed (16) is provided below the air cooler (15); in the spring and autumn combined operation mode, the hot and humid air is initially dehydrated by the water collector (21), and then mixed with the new cold air introduced through the air inlet adjustment window (12) of the air cooler for condensation in the air mixing chamber (17), and then further dehydrated by the mist bed (16), and finally discharged after being heated by the air cooler (15).

5. The composite mixed flow air cooler with a spike device according to claim 1, characterized in that: In the antifreeze mode, all air inlet windows are closed, the induced draft fan (2) of the air cooler is stopped, the circulating water pump is turned off, the spray water is drained, and the internal temperature is maintained by the residual heat of the air cooler (15) and the evaporation coil (9).

6. The composite mixed flow air cooler with a spike device according to claim 1, characterized in that: The cooling filler (8) is a cross-flow filler, and the material is PVC, glass fiber reinforced plastic or stainless steel; the evaporating coil (9) is a counter-flow coil, and the heat exchange component is a tube type, plate type or tube-fin type structure.

7. The composite mixed flow air cooler with a spike device according to claim 5, characterized in that: The heat exchange area of ​​the air cooler (15) is 0.01-10 times that of the evaporating coil (9), and air volume distribution is achieved by adjusting the opening of the air inlet window; the induced draft fan (2) adjusts its operating state or frequency according to the ambient temperature or the medium outlet temperature.

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