Air water taking device suitable for arid region and water taking control method

Abstract

The invention relates to the technical field of air water taking, in particular to an air water taking device suitable for an arid region and a water taking control method.The air water taking device comprises an adsorption box, a water taking channel, an evaporative cooler, an evaporator, a water collecting box and a waste water box, an adsorption plate is installed in the adsorption box, and an air inlet hole is formed in the bottom of the adsorption box; a ventilation hole is formed in one side wall of the adsorption box, and a cover plate is mounted on the ventilation hole; the water taking channel is located on the other side wall of the adsorption tank, the interior of the water taking channel is communicated with the interior of the adsorption tank, the evaporative cooler is installed on the water taking channel, the evaporator is installed in the water taking channel, the water taking channel is communicated with the water collecting tank, the water collecting tank is connected with the waste water tank, and a spraying water pipe is installed on the evaporative cooler and connected with the waste water tank. According to current and historical weather information, air parameters in a period of time in the future can be accurately predicted, two different water taking schemes A and B are automatically matched, and high water taking amount and lower energy consumption can be achieved under different working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of air water intake, and particularly to an air water intake device and a water intake control method applicable to arid regions. Background Art

[0002] The shortage of fresh water resources is a severe challenge faced by all mankind. Air water intake has emerged among numerous solutions due to its wide adaptability and high feasibility. Currently, more research is focused on adsorption air water intake. Adsorption air water intake is a process that involves three steps: adsorption, desorption, and condensation. Moisture in the air is adsorbed by an adsorption material, heated and desorbed to form a locally high-temperature and high-humidity environment, and then condensed into liquid water. However, since most places where air water intake is needed are arid, the energy consumption required for desorption and condensation is high, and the water production is very limited. Therefore, air water intake technology is still difficult to promote at present.

[0003] In this regard, Chinese Patent CN202321968727.X proposes an adsorption bed and a continuous active adsorption air water intake system. The system includes a core bin and a condensate water output unit. The core bin is in the shape of a "field" and is a multi-layer adsorption bed containing a one-way filter membrane. This method has a stable adsorption bed structure, a large material attachment space, and a large water intake. However, the required desorption temperature is high, the desorption energy consumption is high, and the condensing unit needs to handle a large amount of sensible heat, resulting in a low overall efficiency of the machine.

[0004] Chinese Patent CN202410132288.1 discloses an efficient and energy-saving adaptive all-weather composite air water intake device. By coating a moisture-absorbing material on a heat exchanger and equipped with a four-way steering valve, it can make full use of the heat energy and cold energy released by the condenser and evaporator during the operation of the heat pump cycle, always maintaining the adsorbent coating on the refrigeration side in an adsorption state and the adsorbent coating on the heat release side in a desorption state, achieving continuous and safe drinking water supply, with a higher energy conversion and utilization efficiency than conventional electric heating or electric refrigeration technologies. However, this design increases the thermal resistance of the heat exchanger, resulting in poor heat transfer, and it is difficult to directly control the desorption and condensation temperatures.

[0005] Chinese Patent CN202311705276.5 discloses a solar-based series modular adsorption air water intake unit. The water vapor in the atmospheric environment is enriched through an adsorbent filling bed, and the adsorption material is desorbed by a solar heat collection unit. The desorbed water vapor is cooled by an external finned tubular condenser and then condensed into liquid water for collection, realizing air water intake. The device is portable, compact, has a simple structure, and does not require additional energy consumption. However, this method depends on environmental light, has a small water intake, and cannot continuously take water.

[0006] In summary, most of the existing adsorption air water intake devices have problems such as high water intake energy consumption, small water intake, and poor adaptability. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide an air water intake device and a water intake control method applicable to arid regions, so as to solve at least the problems of high water intake energy consumption, small water intake volume, and poor adaptability existing in the prior art.

[0008] The present invention solves the above technical problems through the following technical means:

[0009] In the first aspect of the embodiments of the present invention, there is provided an air water intake device applicable to arid regions, including an adsorption box, a water intake channel, an evaporative cooler, an evaporator, a water collection tank, and a waste water tank. An adsorption plate is installed inside the adsorption box. The bottom of the adsorption box has an air inlet hole, and one side wall of the adsorption box has a ventilation hole, on which a cover plate is installed; the water intake channel is located on the other side wall of the adsorption box, and the inside of the water intake channel is communicated with the inside of the adsorption box. The evaporative cooler is installed on the water intake channel, the evaporator is installed inside the water intake channel, the water intake channel is communicated with the water collection tank, the water collection tank is connected to the waste water tank, and a spray water pipe is installed on the evaporative cooler, and the spray water pipe is connected to the waste water tank.

[0010] In combination with the first aspect, in some embodiments, the evaporative cooler includes a cooling mechanism and a plurality of copper pipes. The cooling mechanism has a humid and hot air channel inside, and the humid and hot air channel is communicated with the water intake channel. The plurality of copper pipes are arranged perpendicular to the humid and hot air channel. The air inlet end of the copper pipe is used to inhale ambient air, and the air exhaust end of the copper pipe is used to discharge the air after heat exchange with the air flow in the humid and hot air channel. The spray water pipe sprays water to the air inlet end of the copper pipe.

[0011] In combination with the first aspect, in some embodiments, a cooling fan is installed at the air inlet end of the copper pipe.

[0012] In combination with the first aspect, in some embodiments, the cooling mechanism includes a housing and a plurality of fins installed inside the housing. The inside of the housing is a humid and hot air channel, and the plurality of copper pipes pass through the plurality of fins.

[0013] In combination with the first aspect, in some embodiments, a filter and a water level sensor are installed in the water collection tank. The water formed in the water intake channel is filtered by the filter, and the purified water formed is collected in the water collection tank. The waste water formed by the filter is discharged into the waste water tank.

[0014] In combination with the first aspect, in some embodiments, the evaporator is connected to a compression type variable frequency refrigeration system. The compression type variable frequency refrigeration system includes an evaporator, a compressor, a condenser, and a throttle valve connected to each other. The compressor is a DC variable frequency compressor.

[0015] In combination with the first aspect, in some embodiments, a centrifugal fan is installed at the inner top of the adsorption tank; a water pump is installed on the connecting pipe between the wastewater tank and the spray pipe.

[0016] In combination with the first aspect, in some embodiments, the inner bottom of the water intake channel starts to slope downward at the position of the evaporative cooler to form an inclined bottom, and the lowest point of the inclined bottom is communicated with the water collection tank.

[0017] The second aspect of the embodiments of the present invention provides a water intake control method, which is applied to the air water intake device described in the first aspect above, and includes the following steps:

[0018] Collect the historical meteorological information in the current water intake area in the past five years, and obtain the current and future 24-hour meteorological information of the current water intake area;

[0019] Set the air moisture content threshold d1, and the threshold t1 for the duration when d≥d1;

[0020] Based on the historical meteorological information and the current and future 24-hour meteorological information, predict the air parameters in the next 3-5 hours, and the air parameters include the air moisture content d, the wind speed, and the duration t when d≥d1;

[0021] Judge the magnitude relationship between d and d1, and between t and t1;

[0022] If d≥d1 and t≥t1, then execute the water intake plan A, otherwise execute the water intake plan B;

[0023] In the water intake plan A, the evaporative cooler is closed, and the ambient air enters the water intake channel through the opened ventilation holes and condenses to take water through the evaporator; in the water intake plan B, the evaporative cooler is opened, and the high-temperature and high-humidity gas desorbed by the adsorption plate condenses to take water through the evaporative cooler and the evaporator.

[0024] In combination with the second aspect, in some embodiments, during the execution of the water intake plan B, when it is detected that the water level h in the water collection tank ≤ the set water level threshold hm, and the water level change rate △h ≤ the set change rate threshold hk within one minute continuously, it is necessary to adjust the rotation speed R of the centrifugal fan to the maximum allowable value Rmax, adjust the water pump of the spray component to the maximum spray water volume Hmax, and adjust the rotation speed of the compressor to the highest Kmax.

[0025] The air water intake device and water intake control method of the present invention, on the one hand, can accurately predict the air parameters in the future for a period of time according to the current and historical meteorological information, automatically match two different water intake schemes, namely water intake scheme A and water intake scheme B, and can achieve high water intake and lower energy consumption under different working conditions; on the other hand, an evaporative cooler with excellent refrigeration performance is added in arid areas to pre-cool and collect water from humid and hot air, effectively saving more than 20% of energy, and at the same time reducing the air temperature entering the evaporator in the compression refrigeration system, further saving energy and reducing consumption; on the third hand, it can automatically judge the urgency of the water intake demand according to the water level height and the water level change rate, and automatically adjust the operating conditions of the equipment, with the advantages of high intelligence, high practicability, high efficiency and low consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of an air water intake device applicable to arid areas;

[0027] Figure 2 is a schematic structural diagram of the evaporative cooler;

[0028] Figure 3 is a schematic structural diagram of the evaporative cooler without the outer shell;

[0029] Figure 4 is a flowchart of the water intake control method;

[0030] Among them, adsorption box 100, adsorption plate 110, heating layer 120, air inlet hole 130, ventilation hole 140, cover plate 150, evaporative cooler 200, copper pipe 210, housing 220, fin 230, evaporator 300, water collection tank 410, filter 411, water level sensor 412, exhaust hole 413, waste water tank 420, ventilation pipe 500, inclined bottom 510, spray water pipe 600, centrifugal fan 700, water pump 800, water intake channel 001, humid and hot air channel 002. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0032] In the description of the specification and claims in this document, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order of objects. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more. For example, a plurality of processing units refers to two or more processing units, and a plurality of components refers to two or more components, etc.

[0033] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0034] Please refer to Figures 1-3 , the air water intake device applicable to arid regions of the present application includes an adsorption box 100, a water intake channel 001, an evaporative cooler 200, an evaporator 300, a water collection tank 410, and a waste water tank 420. An adsorption plate 110 is installed inside the adsorption box 100. The adsorption plate 110 is made of a water-absorbing material, such as MOFs material. A heating layer 120 is installed below the adsorption plate 110 for heating the adsorption plate 110 so that the water adsorbed by the adsorption plate 110 is heated to form high-temperature and high-humidity gas. The bottom of the adsorption box 100 has an air inlet hole 130 for sucking ambient air. One side wall of the adsorption box 100 has a ventilation hole 140, and a cover plate 150 is installed on the ventilation hole 140. The cover plate 150 is hinged at the ventilation hole 140 and can seal or open the ventilation hole 140. A ventilation pipe 500 is connected to another side wall of the adsorption box 100. The inside of the ventilation pipe 500 constitutes the water intake channel 001, that is, the water intake channel 001 is located on another side wall of the adsorption box 100, and the inside of the water intake channel 001 is communicated with the inside of the adsorption box 100. The evaporative cooler 200 is installed on the water intake channel 001, the evaporator 300 is installed inside the water intake channel 001, the water intake channel 001 is communicated with the water collection tank 410, the water collection tank 410 is connected to the waste water tank 420, and a spray water pipe 600 is installed on the evaporative cooler 200. The spray water pipe 600 is connected to the waste water tank 420.

[0035] Please refer to Figure 2 and Figure 3, the evaporative cooler 200 includes a cooling mechanism and a plurality of copper tubes 210. Inside the cooling mechanism, there is a humid and hot air passage 002, which is communicated with the water intake passage 001. The plurality of copper tubes 210 are arranged perpendicular to and intersect with the humid and hot air passage 002. The air intake end of the copper tube 210 is used to inhale ambient air, and the air exhaust end of the copper tube 210 is used to discharge the air after heat exchange with the air flow in the humid and hot air passage 002. The spray water pipe 600 sprays water towards the air intake end of the copper tube 210. In order to facilitate the entry of ambient air into the copper tube 210 and accelerate the air flow inside the copper tube 210, a cooling fan is installed at the air intake end of the copper tube 210. The cooling fan can also dissipate part of the heat in the copper tube 210 into the environment, which is beneficial to the cooling of the air flow in the humid and hot air passage 002. The cooling mechanism includes a housing 220 and a number of fins 230 installed inside the housing 220. The inside of the housing 220 is the humid and hot air passage 002, and the housing 220 is made of special anti-corrosion stainless steel. The plurality of copper tubes 210 pass through a number of fins 230, and the fins 230 are located inside the humid and hot air passage 002. The fins 230 can fully contact and exchange heat with the gas in the humid and hot air passage 002 and transfer the heat to the copper tube 210, which is beneficial to improving the water intake efficiency. Before the ambient air enters the copper tube 210, it is cooled by the water mist sprayed by the spray water pipe 600. Then the air carries a large amount of water mist into the copper tube 210, and the water mist is quickly evaporated by the high temperature inside the copper tube 210. After absorbing a large amount of heat, it becomes steam and enters the environment, further reducing the temperature of the copper tube 210, that is, it can further cool the humid and hot air.

[0036] A filter 411 and a water level sensor 412 are installed in the water collection tank 410. The water formed in the water intake passage 001 is filtered by the filter 411, and the purified water formed is collected in the water collection tank 410. The waste water formed by the filter 411 is discharged into the waste water tank 420. The water level sensor 412 can monitor the water level inside the water collection tank 410 in real time to understand the air water intake effect.

[0037] The evaporator 300 is connected to a compression-type variable-frequency refrigeration system. The compression-type variable-frequency refrigeration system includes an evaporator 300, a compressor, a condenser and a throttle valve that are connected to each other. The compressor is a DC variable-frequency compressor and can adjust the cooling capacity steplessly. Under other unchanged conditions, the intuitive reaction is to adjust the surface temperature of the evaporator 300.

[0038] A centrifugal fan 700 is installed at the inner top of the adsorption box 100. Starting the centrifugal fan 700 is more conducive to inhaling ambient air into the adsorption box 100. A water pump 800 is installed on the connecting pipe between the waste water tank 420 and the spray water pipe 600 so that the spray water pipe 600 can spray water more efficiently.

[0039] The inner bottom of the water intake channel 001 starts to slope downward at the position of the evaporative cooler 200 to form an inclined bottom 510, and the lowest point of the inclined bottom 510 communicates with the water collection tank 410. The water collection tank 410 is located below the water intake channel 001. In this way, under the action of gravity, the water condensed in the water intake channel 001 can automatically flow into the water collection tank 410. In order to allow the dry air after water intake to be discharged smoothly from the air water intake device, an exhaust hole 413 can be provided at the top of the water collection tank 410, and the dry air after water intake is discharged from the exhaust hole 413.

[0040] The air water intake device of the present application can be equipped with a solar battery. In arid areas, solar energy is sufficient and there is no need for additional energy consumption. In addition, a charging port is also equipped and it can be charged for use under special conditions. After the waste water in the waste water tank 420 is exhausted, the water pump 800 is turned off, but the ambient dry air can still be used to pre-cool the humid and hot air.

[0041] Please refer to Figure 4 , the present application also discloses a water intake control method, which is applied to the above air water intake device and includes the following steps:

[0042] S1: Collect the historical meteorological information of the current water intake area in the past five years, and obtain the meteorological information of the current moment and the next 24 hours in the current water intake area.

[0043] S2: Set the air moisture content threshold d1, and the threshold t1 for the duration of d≥d1. Preferably, d1≥17.5g / kg and t1≥3h. The values of d1 and t1 can also be set according to the actual application situation.

[0044] S3: Based on the historical meteorological information and the meteorological information of the current moment and the next 24 hours, predict the air parameters in the next 3-5 hours. The air parameters include the air moisture content d, the wind speed, and the duration t of d≥d1.

[0045] S4: Judge the magnitude relationship between d and d1, and between t and t1.

[0046] S5: If d≥d1, it means that the air contains a large amount of moisture and there is sufficient water. Synchronously predict the duration t of d≥d1, and if t≥t1, it means that this high humidity can last for a considerable time. At this time, there is no need to use the moisture absorption material to enrich the water vapor, and directly condensing the ambient air will have better benefits, so execute the water intake plan A; when d<d1 or t<t1, it means that the environmental conditions are dry or the humid conditions do not last long, and at this time execute the water intake plan B; in the water intake plan A, the evaporative cooler 200 is closed, the ambient air enters the water intake channel 001 through the opened ventilation hole, and water is taken by condensing through the evaporator 300; in the water intake plan B, the evaporative cooler 200 is opened, and the high-temperature and high-humidity gas desorbed by the adsorption plate 110 is condensed to take water through the evaporative cooler 200 and the evaporator 300.

[0047] Specifically, the difference between water intake scheme A and water intake scheme B lies in the different sources of humid air. The humid air enters the adsorption box 100 and the subsequent water intake channel 001 under the action of the centrifugal fan 700. When implementing water intake scheme A, the evaporative cooler 200 does not work, and the humid air in the environment is brought into the evaporator 300 for condensation and water collection. The liquid water flows into the water collection tank 410. There are a filter and a water level sensor 412 in the water collection tank 410. The condensed water is filtered by the filter to form pure water and waste water, and the waste water enters the waste water tank 420 for storage. The waste water in the waste water tank 420 is sprayed onto the air inlet end of the copper tube 210 through the spray water pipe 600 by a water pump for cooling the copper tube 210. In water intake scheme A, the fins 230 and the copper tube 210 in the evaporative cooler 200 still play a role in heat dissipation and cooling, but their effect is not as good as that of turning on the cooling fan. When implementing water intake scheme B, the high-temperature and high-humidity gas (80 °C, 60-80% RH) desorbed from the adsorption plate 110 enters the evaporator 300 cooler through the centrifugal fan and exchanges convective heat with the fins 230 in the humid air channel 002, and the condensed liquid water flows along the inclined bottom into the water collection tank 410. The ambient air entering the copper tube 210 is first cooled by spraying water and then evaporates on the surface of the copper tube 210 while carrying a large amount of water mist, further absorbing heat. In a dry environment with a similar ambient working condition of 30 °C and 30% RH, the water mist is extremely easy to evaporate, and the evaporative cooling technology can cool the incoming air at 30 °C to about 20 °C on the surface of the copper tube 210. That is, the high-temperature and high-humidity air is first cooled and condensed in the evaporator 300 cooler and then enters the evaporator 300 for cooling and condensation. This design can save more than 20% of the energy consumption.

[0048] Furthermore, when implementing water intake scheme B, when it is detected that the water level h in the water collection tank 410 ≤ the set water level threshold hm and the water level change rate △h ≤ the set change rate threshold hk within 1 minute continuously, it means that the water collection tank 410 is not full at this time and the water level is continuously dropping rapidly, that is, the water demand is urgent. At this time, it is necessary to shorten the water intake cycle and increase the water intake volume. Therefore, the fan speed R of the adsorption and desorption process is adjusted to the maximum allowed value Rmax, the water pump of the spray component is adjusted to the maximum spray water volume Hmax, and the rotation speed of the compressor is adjusted to the highest Kmax to meet the rapid water intake. In other cases, the control center adjusts to the most energy-saving mode of water intake according to the algorithm, and both hm and hk can be adjusted according to the actual application situation.

[0049] The air water intake device and water intake control method of the present invention design two different water intake schemes, namely water intake scheme A and water intake scheme B, according to the meteorological detection and prediction information. An evaporative cooler 200 is added for precooling. In arid regions with low relative humidity, the evaporative cooling technology can fully exert its refrigeration capacity, which is more than 50% better than that in coastal regions with high humidity. In addition, the present invention can also judge the urgency of the current water intake according to the water collection level height and the water level change rate, and automatically adjust the water intake amount, so as to achieve high efficiency and low consumption and high intelligence on the premise of meeting the water intake demand.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. An air water intake device applicable to arid regions, characterized in that, It includes an adsorption box, a water intake channel, an evaporative cooler, an evaporator, a water collection tank and a waste water tank. An adsorption plate is installed inside the adsorption box. The bottom of the adsorption box has air inlet holes, and one side wall of the adsorption box has ventilation holes, on which a cover plate is installed; The water intake channel is located on the other side wall of the adsorption box, and the inside of the water intake channel is communicated with the inside of the adsorption box. The evaporative cooler is installed on the water intake channel, the evaporator is installed inside the water intake channel, the water intake channel is communicated with the water collection tank, the water collection tank is connected to the waste water tank, and a spray water pipe is installed on the evaporative cooler, and the spray water pipe is connected to the waste water tank.

2. The air water intake device applicable to arid regions according to claim 1, wherein The evaporative cooler includes a cooling mechanism and multiple copper pipes. The cooling mechanism has a humid and hot air channel inside, and the humid and hot air channel is communicated with the water intake channel. The multiple copper pipes are vertically intersecting with the humid and hot air channel. The air inlet end of the copper pipe is used to suck in ambient air, and the air outlet end of the copper pipe is used to discharge air. The spray water pipe sprays water towards the air inlet end of the copper pipe.

3. The air water intake device applicable to arid regions according to claim 2, characterized in that, A cooling fan is installed at the air inlet end of the copper pipe.

4. The air water intake device applicable to arid regions according to claim 2, characterized in that, The cooling mechanism includes a housing and several fins installed inside the housing. The inside of the housing is a humid and hot air channel, and the multiple copper pipes pass through the several fins.

5. The air water intake device applicable to arid regions according to claim 1, characterized in that, A filter and a water level sensor are installed inside the water collection tank. The water formed inside the water intake channel is filtered by the filter, and the purified water formed is collected inside the water collection tank. The waste water formed by the filter is discharged into the waste water tank.

6. The air water intake device applicable to arid regions according to claim 1, characterized in that The evaporator is connected to a compression-type variable-frequency refrigeration system. The compression-type variable-frequency refrigeration system includes an evaporator, a compressor, a condenser and a throttle valve that are connected to each other. The compressor is a DC variable-frequency compressor.

7. The air water intake device applicable to arid regions according to claim 1, characterized in that, A centrifugal fan is installed at the inner top of the adsorption box; a water pump is installed on the connecting pipe between the waste water tank and the spray pipe.

8. The air water intake device applicable to arid regions according to claim 1, wherein The inner bottom of the water intake channel starts to slope downwards at the position of the evaporative cooler to form an inclined bottom, and the lowest point of the inclined bottom is communicated with the water collection tank.

9. Water intake control method, characterized in that, The water intake control method is applied to the air water intake device according to any one of claims 1-8, and includes the following steps: Collect the historical meteorological information in the current water intake area in the past five years, and obtain the meteorological information at this moment and in the next 24 hours in the current water intake area; Set an air moisture content threshold d1, and a threshold t1 for the duration of d≥d1; Based on the historical meteorological information and the meteorological information at this moment and in the next 24 hours, predict the air parameters in the next 3-5 hours. The air parameters include air moisture content d, wind speed and the duration t of d≥d1; Judge the magnitude relationship between d and d1, and between t and t1; If d≥d1 and t≥t1, then execute water intake plan A, otherwise execute water intake plan B; In the water intake plan A, the evaporative cooler is closed, and the ambient air enters the water intake channel through the opened ventilation holes and condenses to take water through the evaporator; In the water intake plan B, the evaporative cooler is opened, and the high-temperature and high-humidity gas desorbed by the adsorption plate condenses to take water through the evaporative cooler and the evaporator.

10. The water intake control method according to claim 9, wherein, During the implementation of the water intake plan B, when it is detected that the water level h in the water collection tank is ≤ the set water level threshold hm, and the water level change rate △h is ≤ the set change rate threshold hk within one continuous minute, it is necessary to adjust the rotational speed R of the centrifugal fan to the maximum allowable value Rmax, adjust the water pump of the spray component to the maximum spray water volume Hmax, and adjust the rotational speed of the compressor to the highest Kmax.

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