System for extracting water from air and control method thereof

Abstract

The invention discloses a system for extracting water from air and a control method thereof. The system for extracting water from air comprises a control device, a multi-stage evaporation mechanism, a water collecting tank, a variable-frequency evaporation mechanism and a plurality of adsorption mechanisms with consistent structures, wherein the variable-frequency evaporation mechanism and the adsorption mechanisms are electrically connected with the control device; the adsorption mechanism comprises adsorption areas and desorption areas, the multiple desorption areas are connected in series, and the multiple adsorption areas are connected in parallel; the multi-stage evaporation mechanism comprises an evaporation end and a condensation end, the multiple desorption areas, the evaporation end and the variable-frequency evaporation mechanism are sequentially arranged in the fresh air inlet and outlet direction, the water collecting tank is used for collecting condensate water generated by the multi-stage evaporation mechanism and the variable-frequency evaporation mechanism, and the condensation end is used for providing heat sources for the desorption areas correspondingly; according to the system for extracting water from air, the adsorption areas connected in parallel are arranged, so that the moisture absorption amount of ambient air is maximized; by arranging the serial desorption areas, the dew point temperature can be increased step by step, so that the difference value of the air water content is remarkably increased; and the multi-stage evaporation mechanism and the variable-frequency evaporation mechanism are combined, low-efficiency operation of the compressor is avoided, and energy consumption is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of adsorption dehumidification, and in particular to an air water intake system and a control method thereof. Background Art

[0002] Among the traditional technologies for air water extraction, mechanical refrigeration methods are widely used. Specifically, condensation water is obtained by cooling the air below the dew point. However, the water extraction per unit volume and unit air volume of this method is relatively low, and the energy consumption required to obtain unit water volume is high, which makes it not ideal for industrial-scale air water extraction applications.

[0003] Traditional condensation water extraction units are mainly composed of a compressor, condenser, throttling device, evaporator, pipelines and electronic control components; among these components, the refrigerant medium in the evaporator is at a low pressure and low temperature state, and the surface temperature of its copper tubes and fins is lower than the dew point temperature of the air. When the air flows through the copper tubes and fin surfaces, the air temperature is reduced to below the dew point through heat exchange, thereby generating condensation and forming water droplets, achieving the purpose of air water extraction.

[0004] However, during operation, traditional condensation water extraction units need to set the cooling temperature far below the dew point temperature to ensure sufficient air water extraction. The greater the difference between the dew point temperature and the cooling temperature, the greater the air water extraction capacity in theory. However, the condensation temperature is limited by the outdoor air environment, which leads to a large pressure difference and increases the energy consumption of the compressor unit. If you want to produce more water from the air, you must lower the evaporation temperature even further, which will lead to reduced efficiency, shortened lifespan and increased power consumption of the compressor.

[0005] That is, the traditional mechanical refrigeration air water intake device has the problems of small water intake and high energy consumption. It can be seen that the existing technology needs to be improved and enhanced. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an air water intake system, which is equipped with parallel adsorption zones to maximize the air moisture absorption; equipped with series desorption zones to gradually increase the dew point temperature, and combined with a multi-stage and variable frequency evaporation mechanism, which can avoid inefficient operation of the compressor and greatly reduce energy consumption.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An air water intake system comprises a control device, a multi-stage evaporation mechanism, a water collecting tank, and a variable frequency evaporation mechanism and a plurality of adsorption mechanisms electrically connected to the control device respectively, wherein the structures of the plurality of adsorption mechanisms are consistent; the adsorption mechanism comprises an adsorption zone and a desorption zone, the desorption zones of the plurality of adsorption mechanisms are connected in series, and the adsorption zones of the plurality of adsorption mechanisms are connected in parallel; the multi-stage evaporation mechanism comprises an evaporation end and a condensation end, the desorption zones of the plurality of adsorption mechanisms, the evaporation end of the multi-stage evaporation mechanism and the variable frequency evaporation mechanism are arranged in sequence along the direction of fresh air inlet and outlet, the water collecting tank is used to collect condensed water generated by the multi-stage evaporation mechanism and the variable frequency evaporation mechanism, and the condensation end of the multi-stage evaporation mechanism is used to provide a heat source for the desorption zones of the plurality of adsorption mechanisms.

[0009] In the air water intake system, the multi-stage evaporation mechanism also includes a first compressor and a first throttling device. The condensation end of the multi-stage evaporation mechanism includes multiple condensation heaters, the number of the condensation heaters matches the number of the adsorption mechanisms, and the multiple condensation heaters are respectively arranged on the air inlet side of the desorption zone of the corresponding adsorption mechanism; the evaporation end of the multi-stage evaporation mechanism includes multiple evaporation water extractors, the number of the evaporation water extractors matches the number of the condensation heaters, and the multiple evaporation water extractors are respectively connected to the multiple condensation heaters through the first throttling device and the first compressor.

[0010] In the air water intake system, the variable frequency evaporation mechanism includes a regulating evaporator, a regulating condenser, a second compressor and a second throttling device. The regulating evaporator and the regulating condenser are arranged in sequence along the fresh air inlet and outlet directions, and the regulating evaporator is connected to the regulating condenser through the second compressor and the second throttling device; the water collecting tank is used to collect the condensed water generated by the multi-stage evaporation mechanism and the regulating evaporator.

[0011] The air water intake system also includes a first air filter device and a water intake fan electrically connected to the control device; the first air filter device is arranged on the fresh air inlet side, the air inlet end of the water intake fan is connected to the regulating condenser, and the water intake fan is used to provide power for the fresh air water intake processing.

[0012] The air water intake system also includes a regulating air valve electrically connected to the control device, the first port of the regulating air valve is connected to the air outlet end of the water intake fan, the second port of the regulating air valve is connected to the adsorption mechanism located on the air outlet side, and the third port of the regulating air valve is used to output fresh air after water intake treatment.

[0013] In the air water intake system, the adsorption mechanism also includes a second air filter device, an air inlet pipe, an exhaust pipe and an exhaust fan electrically connected to the control device, the air inlet pipe is connected to the air inlet end of the adsorption area, and is used to deliver fresh air to the adsorption area; the second air filter device is arranged on the air inlet pipe and is located on the air inlet side of the adsorption area; the exhaust pipe is connected to the air outlet end of the adsorption area, and the exhaust fan is arranged on the exhaust pipe and is located on the exhaust side of the adsorption area.

[0014] The present invention also provides a control method for an air water intake system, which is used to implement the operation control of any of the above air water intake systems, and the control method includes:

[0015] Acquiring a set heating temperature and acquiring real-time heating temperature information of a condensing end of the multi-stage evaporation mechanism, and adjusting the operating state of the first compressor based on the real-time heating temperature information and the set heating temperature;

[0016] A target water intake is obtained, a target evaporation temperature is determined based on the target water intake, and the operating state of the variable frequency evaporation mechanism is adjusted based on the target evaporation temperature.

[0017] In the control method of the air water intake system, obtaining the set heating temperature and obtaining the real-time heating temperature information of the condensing end of the multi-stage evaporation mechanism, and adjusting the working state of the first compressor based on the real-time heating temperature information and the set heating temperature, includes:

[0018] Acquire a set heating temperature, wherein the set heating temperature includes a plurality of temperatures corresponding to the plurality of condensing heaters, and the plurality of set heating temperatures increase in sequence along the direction of fresh air inlet and outlet;

[0019] Acquiring real-time heating temperature information, wherein the real-time heating temperature information includes a plurality of real-time heating temperatures corresponding to the condensing heaters;

[0020] Based on the real-time heating temperature and the set heating temperature corresponding to the condensing heater, a PID algorithm is used to adjust the operating frequency of the first compressor so that the deviation value between the real-time heating temperature and the set heating temperature is less than or equal to a preset heating temperature deviation threshold.

[0021] In the control method of the air water intake system, the variable frequency evaporation mechanism includes a regulating evaporator, a regulating condenser, and a second compressor. The regulating evaporator and the regulating condenser are arranged in sequence along the fresh air inlet and outlet directions, and the regulating evaporator is connected to the regulating condenser via the second compressor. The method of obtaining a target water intake, determining a target evaporation temperature based on the target water intake, and adjusting the working state of the variable frequency evaporation mechanism based on the target evaporation temperature includes:

[0022] Obtain target water intake and real-time dew point temperature, and confirm target evaporation temperature based on target water intake and real-time dew point temperature;

[0023] The real-time evaporation temperature is obtained, and based on the real-time evaporation temperature and the target evaporation temperature, the operating frequency of the second compressor is adjusted using a PID algorithm so that the deviation between the real-time evaporation temperature and the target evaporation temperature is less than or equal to a preset evaporation temperature deviation threshold.

[0024] In the control method of the air water intake system, the air water intake system further includes a regulating air valve, a first port of the regulating air valve is connected to the air outlet end of the variable frequency evaporation mechanism, a second port of the regulating air valve is connected to the adsorption mechanism located on the air outlet side, and a third port of the regulating air valve is used to output fresh air after water intake treatment; the control method further includes the steps of:

[0025] Obtain the real-time ambient air humidity and the real-time inlet air humidity on the air inlet side of the regulating air valve;

[0026] If the real-time inlet air humidity is greater than or equal to the real-time ambient air humidity, the first port of the regulating air valve is controlled to be connected to the second port, and the third port of the regulating air valve is controlled to be closed;

[0027] If the real-time humidity of the incoming air is less than the real-time humidity of the ambient air, the first port of the regulating air valve is controlled to be connected to the third port, and the second port of the regulating air valve is controlled to be closed.

[0028] Beneficial effects:

[0029] The present invention provides an air water extraction system, which maximizes the moisture absorption of the ambient air through the configuration of parallel adsorption zones; and the setting of series desorption zones causes the dew point temperature to rise step by step, significantly improving the difference in air moisture content, laying a solid foundation for efficient condensation water extraction; further, combined with the multi-stage evaporation mechanism and the variable frequency evaporation mechanism, it effectively avoids the compressor from running in a low-efficiency state for a long time, thereby greatly reducing the working energy consumption of the compressor; the air water extraction system disclosed in the present application can stably produce water under different humidity and temperature conditions, meeting the needs of large-scale continuous water extraction in industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A first structural schematic diagram of the air water intake system provided by the present invention;

[0031] Figure 2 A second structural schematic diagram of the air water intake system provided by the present invention;

[0032] Figure 3 This is a logic flow chart of the control method provided by the present invention.

[0033] Explanation of the main component symbols: 11-evaporation water extractor, 12-condensation heater, 13-first compressor, 14-first throttling device, 2-water collecting tank, 31-adjusting evaporator, 32-adjusting condenser, 33-second compressor, 34-second throttling device, 41-desorption zone, 42-adsorption zone, 43-second air filter device, 44-exhaust fan, 5-first air filter device, 6-water intake fan, 7-adjusting air valve, 8-control device. DETAILED DESCRIPTION

[0034] The present invention provides an air water intake system and a control method thereof. To make the purpose, technical solution and effects of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0035] In the description of the present invention, it should be understood that the terms "installation" and "connection" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1 and Figure 2 The present invention provides an air water intake system, comprising a control device 8, a multi-stage evaporation mechanism, a water collecting tank 2, and a variable frequency evaporation mechanism and a plurality of adsorption mechanisms electrically connected to the control device 8 respectively, and the structures of the plurality of adsorption mechanisms are consistent; the adsorption mechanism comprises an adsorption area 42 and a desorption area 41, the desorption areas 41 of the plurality of adsorption mechanisms are connected in series, and the adsorption areas 42 of the plurality of adsorption mechanisms are connected in parallel; the multi-stage evaporation mechanism comprises an evaporation end and a condensation end, the desorption areas 41 of the plurality of adsorption mechanisms, the evaporation end of the multi-stage evaporation mechanism and the variable frequency evaporation mechanism are arranged in sequence along the fresh air inlet and outlet directions, the water collecting tank 2 is used to collect condensed water generated by the multi-stage evaporation mechanism and the variable frequency evaporation mechanism, and the condensation end of the multi-stage evaporation mechanism is used to provide a heat source for the desorption areas 41 of the plurality of adsorption mechanisms.

[0037] The present application discloses an air water extraction system, which maximizes the moisture absorption of the ambient air through the configuration of parallel adsorption zones 42; and the setting of series desorption zones 41 causes the dew point temperature to rise step by step, significantly improving the difference in air moisture content, laying a solid foundation for efficient condensation water extraction; further, combined with a multi-stage evaporation mechanism and a variable frequency evaporation mechanism, it effectively avoids the compressor from operating in a low-efficiency state for a long time, thereby greatly reducing the working energy consumption of the compressor; the air water extraction system disclosed in the present application can stably produce water under different humidity and temperature conditions, meeting the needs of large-scale continuous water extraction in industry.

[0038] Specifically, in this embodiment, three adsorption mechanisms are included, each of which includes an adsorption zone 42 and a desorption zone 41. The adsorption materials of the adsorption zone 42 and the desorption zone 41 are porous materials such as silica gel and molecular sieve. The fresh air is heated by the condensation end of the multi-stage evaporation mechanism through the desorption zone 41 arranged in series, and then passes through the desorption zones 41 of multiple adsorption mechanisms in turn. The high-temperature desorption principle is used to make the adsorption material release water molecules, and the air dew point temperature is gradually increased to significantly increase the difference in air moisture content. The adsorption zones 42 of each adsorption mechanism are arranged in parallel, and fresh air is independently inhaled from the environment. Water molecules in the air are absorbed by low-temperature adsorption, thereby reducing air humidity and maximizing environmental moisture absorption. The high-dew-point air processed by multiple adsorption mechanisms is first cooled and condensed step by step by the evaporation end of the multi-stage evaporation mechanism, and then the residual humidity is dynamically adjusted by the variable frequency evaporation mechanism, and finally the water is produced and stored in the water collecting tank 2.

[0039] Further, see Figure 1 and Figure 2 The multi-stage evaporation mechanism further includes a first compressor 13 and a first throttling device 14. The condensation end of the multi-stage evaporation mechanism includes a plurality of condensation heaters 12. The number of the condensation heaters 12 matches the number of the adsorption mechanisms, and the plurality of condensation heaters 12 are respectively arranged on the air inlet side of the desorption zone 41 of the corresponding adsorption mechanism; the evaporation end of the multi-stage evaporation mechanism includes a plurality of evaporation water extractors 11. The number of the evaporation water extractors 11 matches the number of the condensation heaters 12, and the plurality of evaporation water extractors 11 are respectively connected to the plurality of condensation heaters 12 through the first throttling device 14 and the first compressor 13.

[0040] In this embodiment, the condensing end of the multi-stage evaporation mechanism includes three condensing heaters 12, and the three condensing heaters 12 are respectively arranged on the air inlet side of the desorption zone 41 of the three adsorption mechanisms; the evaporation end of the multi-stage evaporation mechanism is correspondingly provided with three evaporation water extractors 11, and the three evaporation water extractors 11 are respectively connected to the three condensing heaters 12 through the first compressor 13 and the first throttling device 14; in actual operation, the first compressor 13 drives the refrigerant circulation, and the condensing heater 12 transfers heat to the air on the air inlet side of the desorption zone 41. The heating temperature of the three condensing heaters 12 is set to be low for the front stage and high for the rear stage, so as to ensure that the desorption of the rear stage is more sufficient and the rear stage can be made The desorption zone 41 further increases the air humidity on the basis of the previous stage to achieve a step-by-step increase in the dew point temperature; for example, if the temperature of the first-stage condensation heater 12 is set to 60°C, the second stage may be set to 70°C, and the third stage is set to 80°C, so that the air dew point temperature is gradually increased from 30°C to 50°C and 65°C, and finally a larger condensation temperature difference is achieved in the multi-stage evaporation mechanism; and the high-temperature and high-humidity air treated by only three desorption zones 41 passes through the three-stage evaporative water extractor 11 in turn. The evaporative water extractor 11 is set to a temperature of the front stage higher than that of the rear stage, and condenses water step by step to avoid secondary evaporation of the condensed water in the front stage, thereby increasing the water intake per unit air volume, avoiding excessive load on a single evaporator, and enhancing the air water intake system's ability to resist environmental fluctuations.

[0041] Further, see Figure 1 and Figure 2 The variable frequency evaporation mechanism includes a regulating evaporator 31, a regulating condenser 32, a second compressor 33 and a second throttling device 34. The regulating evaporator 31 and the regulating condenser 32 are arranged in sequence along the fresh air inlet and outlet directions, and the regulating evaporator 31 is connected to the regulating condenser 32 through the second compressor 33 and the second throttling device 34; the water collecting tank 2 is used to collect condensed water generated by the multi-stage evaporation mechanism and the regulating evaporator 31.

[0042] In this embodiment, the second compressor 33 adjusts the refrigerant flow rate through frequency conversion technology so that the real-time evaporation temperature of the evaporator 31 matches the target evaporation temperature calculated based on the target water intake. Specifically, when the ambient humidity decreases, the evaporation temperature is automatically lowered to increase the condensation temperature difference. When the energy consumption approaches the preset energy consumption threshold, the evaporation temperature is appropriately increased, and a dynamic balance between water production and energy consumption is achieved through the PID algorithm.

[0043] Further, see Figure 1 and Figure 2The air water intake system also includes a first air filter device 5 and a water intake fan 6 electrically connected to the control device 8; the first air filter device 5 is arranged on the fresh air inlet side, and the air inlet end of the water intake fan 6 is connected to the regulating condenser 32, and the water intake fan 6 is used to provide power for the fresh air water intake processing.

[0044] In this embodiment, a first air filter device 5 is provided on the fresh air inlet side, which can filter out dust, prevent dust from clogging the micropores of the adsorption material, extend the replacement cycle of the adsorption mechanism, and reduce repair and maintenance costs; the water intake fan 6 provides airflow power to drive the air to flow through the desorption area 41, the multi-stage evaporation end and the variable frequency evaporation end in sequence, ensuring stable delivery of fresh air, and can automatically adjust the air volume according to the system resistance, avoiding the problem of reduced water intake efficiency due to dust accumulation on the filter.

[0045] Further, see Figure 1 The air water intake system also includes a regulating air valve 7 electrically connected to the control device 8, the first port of the regulating air valve 7 is connected to the air outlet end of the water intake fan 6, the second port of the regulating air valve 7 is connected to the adsorption mechanism located on the air outlet side, and the third port of the regulating air valve 7 is used to output fresh air after water intake treatment.

[0046] In this embodiment, the air valve 7 is adjusted to switch the flow direction according to the air humidity. If the humidity of the treated air is greater than or equal to the real-time ambient humidity, the treated air is circulated to the desorption zone 41 for reuse; otherwise, it is discharged and fresh air is inhaled at the same time. By adjusting the air valve circulation design, the energy consumption of fresh air can be reduced and the overall efficiency of the water intake system can be improved. In addition, by setting the adjustable air valve, dry air can be prevented from returning to the desorption zone 41, causing the adsorption material to absorb moisture again, thereby ensuring stable desorption efficiency.

[0047] Further, see Figure 1 and Figure 2 The adsorption mechanism also includes a second air filter device 43, an air inlet pipe, an exhaust pipe and an exhaust fan 44 electrically connected to the control device 8, the air inlet pipe is connected to the air inlet end of the adsorption area 42, and is used to deliver fresh air to the adsorption area 42; the second air filter device 43 is arranged on the air inlet pipe and is located on the air inlet side of the adsorption area 42; the exhaust pipe is connected to the air outlet end of the adsorption area 42, and the exhaust fan 44 is arranged on the exhaust pipe and is located on the exhaust side of the adsorption area 42.

[0048] In this embodiment, each adsorption mechanism includes an air inlet pipe and an exhaust pipe. The fresh air enters the adsorption area 42 after passing through the second air filter device 43, adsorbs water molecules at low temperature, and the dry air is discharged through the exhaust fan 44; the area ratio of the adsorption area 42 to the desorption area 41 can be set to 1:1, 1:2, etc. In a high humidity environment, the area of the adsorption area 42 is increased to increase the moisture absorption capacity, and in a low humidity environment, the area of the desorption area 41 is increased to enhance the dew point increase.

[0049] See also Figure 3 The present invention also provides a control method for an air water intake system, the control method being used to implement the operation control of any of the above-described air water intake systems, the control method comprising:

[0050] 101. Obtain a set heating temperature and obtain real-time heating temperature information of a condensing end of a multi-stage evaporation mechanism, and adjust the operating state of the first compressor 13 based on the real-time heating temperature information and the set heating temperature;

[0051] In this embodiment, the frequency of the first compressor 13 is adjusted to stabilize the temperature of the multi-stage condensation heater 12 and ensure desorption efficiency, that is, to ensure that the temperature gradient in the desorption zone 41 is stable, to ensure efficient water release of the multi-stage adsorption material, and to avoid insufficient dew point temperature increase due to temperature fluctuations.

[0052] 102. Obtain a target water intake, determine a target evaporation temperature based on the target water intake, and adjust the operating state of the variable frequency evaporation mechanism based on the target evaporation temperature;

[0053] In this embodiment, the frequency of the second compressor 33 is adjusted to dynamically match the target evaporation temperature, thereby balancing energy consumption and water production to meet energy efficiency optimization requirements under different climates.

[0054] Furthermore, the step of obtaining the set heating temperature and obtaining real-time heating temperature information of the condensing end of the multi-stage evaporation mechanism, and adjusting the working state of the first compressor 13 based on the real-time heating temperature information and the set heating temperature includes:

[0055] 201. Obtain a set heating temperature, wherein the set heating temperature includes a plurality of temperatures corresponding to the plurality of condensing heaters 12 , and the plurality of set heating temperatures increase in sequence along the direction of fresh air inlet and outlet;

[0056] In this embodiment, the set heating temperature is also related to the adsorption material.

[0057] 202. Acquire real-time heating temperature information, where the real-time heating temperature information includes a plurality of real-time heating temperatures corresponding to the condensing heater 12;

[0058] In this embodiment, the set temperature of the condensing heater 12 increases along the fresh air flow direction, such as 60°C for the first stage, 70°C for the second stage, and 80°C for the third stage. The temperature of the rear stage is 10-20°C higher than that of the front stage, ensuring that the desorption driving force is enhanced step by step. Through the temperature gradient design, the air dew point temperature increase rate can be increased, and compared with the traditional single-stage system, the water content difference in the same time is greatly increased.

[0059] 203. Based on the real-time heating temperature and the set heating temperature corresponding to the condensing heater 12, the operating frequency of the first compressor 13 is adjusted using a PID algorithm so that the deviation between the real-time heating temperature and the set heating temperature is less than or equal to a preset heating temperature deviation threshold;

[0060] In this embodiment, if the real-time heating temperature of a certain stage of the condensing heater 12 is lower than the set heating temperature, the controller increases the frequency of the first compressor 13 to increase the heating amount, and vice versa reduces the frequency so that the deviation between the real-time heating temperature and the set heating temperature is ≤±2°C, thereby avoiding frequent start and stop of the first compressor 13 due to temperature fluctuations and extending the working life of the multi-stage evaporation mechanism.

[0061] Furthermore, the variable frequency evaporation mechanism includes a regulating evaporator 31, a regulating condenser 32, and a second compressor 33. The regulating evaporator 31 and the regulating condenser 32 are sequentially arranged along the fresh air inlet and outlet directions, and the regulating evaporator 31 is connected to the regulating condenser 32 via the second compressor 33. The obtaining of the target water intake, determining the target evaporation temperature based on the target water intake, and adjusting the working state of the variable frequency evaporation mechanism based on the target evaporation temperature include:

[0062] 301. Obtain a target water intake and a real-time dew point temperature, and determine a target evaporation temperature based on the target water intake and the real-time dew point temperature;

[0063] In this embodiment, a larger unit water intake is achieved by maximizing the difference between the dew point temperature and the cooling temperature. Therefore, the required difference between the dew point temperature and the evaporation temperature can be reversely inferred based on the target water intake, and then the target evaporation temperature can be determined; the target evaporation temperature is the difference between the real-time dew point temperature and the preset optimal temperature difference, and the preset optimal temperature difference is a fixed temperature difference optimized according to energy efficiency. The real-time dew point temperature can be obtained by a first temperature sensor arranged on the air inlet side of the multi-stage evaporation mechanism.

[0064] 302. Obtain a real-time evaporation temperature. Based on the real-time evaporation temperature and the target evaporation temperature, use a PID algorithm to adjust the operating frequency of the second compressor 33 so that the deviation between the real-time evaporation temperature and the target evaporation temperature is less than or equal to a preset evaporation temperature deviation threshold.

[0065] In this embodiment, the real-time evaporation temperature can be obtained by a second temperature sensor arranged on the air outlet side of the adjustment evaporator; if the deviation between the real-time evaporation temperature of the adjustment evaporator 31 and the target evaporation temperature is greater than ±1°C, the frequency of the second compressor 33 is adjusted to drive the refrigerant flow to change so that the actual evaporation temperature approaches the target evaporation temperature; the target frequency of the second compressor 33 is calculated based on the real-time evaporation temperature and a pre-built frequency curve, such as a frequency adjustment of 5Hz for every 1°C deviation; by dynamically adjusting the operating frequency of the second compressor 33, the air water intake system can be steplessly adjusted within the rated water production range of 50%-100% to meet the needs of different industrial scenarios.

[0066] Furthermore, the air water intake system further includes a regulating air valve 7, a first port of the regulating air valve 7 is connected to the air outlet end of the variable frequency evaporation mechanism, a second port of the regulating air valve 7 is connected to the adsorption mechanism located on the air outlet side, and a third port of the regulating air valve 7 is used to output fresh air after water intake treatment; the control method further includes the steps of:

[0067] 401. Obtain the real-time ambient air humidity and the real-time inlet air humidity on the air inlet side of the regulating air valve 7;

[0068] In this embodiment, the real-time ambient air humidity can be obtained by a first humidity sensor arranged in the environment, and the real-time inlet air humidity can be obtained by a second humidity sensor arranged on the air inlet side of the regulating air valve 7. The first humidity sensor and the second humidity sensor are electrically connected to the control device 8 respectively.

[0069] 402. If the real-time inlet air humidity is greater than or equal to the real-time ambient air humidity, the first port of the regulating air valve 7 is controlled to be connected to the second port, and the third port of the regulating air valve 7 is controlled to be closed;

[0070] In this embodiment, when the humidity of the treated air is greater than or equal to the real-time ambient humidity, it indicates that the air after water treatment still contains a lot of moisture. The treated air can be recycled to the desorption zone 41 for reuse, thereby improving the overall moisture absorption efficiency of the air water intake system.

[0071] 403. If the real-time inlet air humidity is less than the real-time ambient air humidity, the first port of the regulating air valve 7 is controlled to be connected to the third port, and the second port of the regulating air valve 7 is controlled to be closed;

[0072] In this embodiment, when the humidity of the treated air is less than the real-time ambient humidity, it means that the air after water treatment is close to a dry state and can be directly discharged into the environment and further inhaled with fresh humid air to reduce the energy consumption of fresh air and fan, and avoid dry air from entering the desorption zone 41 to cause condensation on the surface of the condensation heater 12, thereby ensuring the safe operation of the equipment.

[0073] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. An air water extraction system, characterized in that: It includes a control device, a multi-stage evaporation mechanism, a water collecting tank, and a variable frequency evaporation mechanism and multiple adsorption mechanisms electrically connected to the control device respectively, and the structures of the multiple adsorption mechanisms are consistent; the adsorption mechanism includes an adsorption area and a desorption area, and the desorption areas of the multiple adsorption mechanisms are connected in series, and the adsorption areas of the multiple adsorption mechanisms are connected in parallel; the multi-stage evaporation mechanism includes an evaporation end and a condensation end, and the desorption areas of the multiple adsorption mechanisms, the evaporation end of the multi-stage evaporation mechanism and the variable frequency evaporation mechanism are arranged in sequence along the fresh air inlet and outlet direction, the water collecting tank is used to collect condensed water generated by the multi-stage evaporation mechanism and the variable frequency evaporation mechanism, and the condensation end of the multi-stage evaporation mechanism is used to provide a heat source for the desorption areas of the multiple adsorption mechanisms.

2. The air water intake system according to claim 1, characterized in that: The multi-stage evaporation mechanism also includes a first compressor and a first throttling device. The condensation end of the multi-stage evaporation mechanism includes multiple condensation heaters, the number of the condensation heaters matches the number of the adsorption mechanisms, and the multiple condensation heaters are respectively arranged on the air inlet side of the desorption zone of the corresponding adsorption mechanism; the evaporation end of the multi-stage evaporation mechanism includes multiple evaporation water extractors, the number of the evaporation water extractors matches the number of the condensation heaters, and the multiple evaporation water extractors are respectively connected to the multiple condensation heaters through the first throttling device and the first compressor.

3. The air water extraction system according to claim 1, characterized in that: The variable frequency evaporation mechanism includes a regulating evaporator, a regulating condenser, a second compressor and a second throttling device. The regulating evaporator and the regulating condenser are arranged in sequence along the fresh air inlet and outlet directions, and the regulating evaporator is connected to the regulating condenser through the second compressor and the second throttling device; the water collecting tank is used to collect condensed water generated by the multi-stage evaporation mechanism and the regulating evaporator.

4. The air water extraction system according to claim 3, characterized in that: It also includes a first air filter device and a water intake fan electrically connected to the control device; the first air filter device is arranged on the fresh air inlet side, the air inlet end of the water intake fan is connected to the regulating condenser, and the water intake fan is used to provide power for the water intake processing of the fresh air.

5. The air water intake system according to claim 4, characterized in that: It also includes a regulating air valve electrically connected to the control device, the first port of the regulating air valve is connected to the air outlet end of the water intake fan, the second port of the regulating air valve is connected to the adsorption mechanism located on the air outlet side, and the third port of the regulating air valve is used to output fresh air after water intake treatment.

6. The air water intake system according to claim 1, characterized in that: The adsorption mechanism also includes a second air filtering device, an air inlet pipe, an exhaust pipe and an exhaust fan electrically connected to the control device, the air inlet pipe is connected to the air inlet end of the adsorption area, and is used to transport fresh air to the adsorption area; the second air filtering device is arranged on the air inlet pipe and is located on the air inlet side of the adsorption area; the exhaust pipe is connected to the air outlet end of the adsorption area, and the exhaust fan is arranged on the exhaust pipe and is located on the exhaust side of the adsorption area.

7. A control method for an air water intake system, characterized in that: The control method is used to implement the operation control of the air water intake system according to any one of claims 2 to 6, and the control method includes: Acquiring a set heating temperature and acquiring real-time heating temperature information of a condensing end of the multi-stage evaporation mechanism, and adjusting the operating state of the first compressor based on the real-time heating temperature information and the set heating temperature; A target water intake is obtained, a target evaporation temperature is determined based on the target water intake, and the operating state of the variable frequency evaporation mechanism is adjusted based on the target evaporation temperature.

8. The control method of an air water intake system according to claim 7, characterized in that: The step of obtaining the set heating temperature and the real-time heating temperature information of the condensing end of the multi-stage evaporation mechanism, and adjusting the working state of the first compressor based on the real-time heating temperature information and the set heating temperature includes: Acquire a set heating temperature, wherein the set heating temperature includes a plurality of temperatures corresponding to the plurality of condensing heaters, and the plurality of set heating temperatures increase in sequence along the direction of fresh air inlet and outlet; Acquiring real-time heating temperature information, wherein the real-time heating temperature information includes a plurality of real-time heating temperatures corresponding to the condensing heaters; Based on the real-time heating temperature and the set heating temperature corresponding to the condensing heater, a PID algorithm is used to adjust the operating frequency of the first compressor so that the deviation value between the real-time heating temperature and the set heating temperature is less than or equal to a preset heating temperature deviation threshold.

9. The control method of an air water intake system according to claim 7, characterized in that: The variable frequency evaporation mechanism includes a regulating evaporator, a regulating condenser, and a second compressor. The regulating evaporator and the regulating condenser are sequentially arranged along the fresh air inlet and outlet directions, and the regulating evaporator is connected to the regulating condenser via the second compressor. The step of obtaining a target water intake, determining a target evaporation temperature based on the target water intake, and adjusting the working state of the variable frequency evaporation mechanism based on the target evaporation temperature includes: Obtain target water intake and real-time dew point temperature, and confirm target evaporation temperature based on target water intake and real-time dew point temperature; The real-time evaporation temperature is obtained, and based on the real-time evaporation temperature and the target evaporation temperature, the operating frequency of the second compressor is adjusted using a PID algorithm so that the deviation between the real-time evaporation temperature and the target evaporation temperature is less than or equal to a preset evaporation temperature deviation threshold.

10. The control method of an air water intake system according to claim 7, characterized in that: The air water intake system further includes a regulating air valve, wherein a first port of the regulating air valve is connected to an air outlet end of the variable frequency evaporation mechanism, a second port of the regulating air valve is connected to an adsorption mechanism located on the air outlet side, and a third port of the regulating air valve is used to output fresh air after water intake treatment; the control method further includes the steps of: Obtain the real-time ambient air humidity and the real-time inlet air humidity on the air inlet side of the regulating air valve; If the real-time inlet air humidity is greater than or equal to the real-time ambient air humidity, the first port of the regulating air valve is controlled to be connected to the second port, and the third port of the regulating air valve is controlled to be closed; If the real-time humidity of the incoming air is less than the real-time humidity of the ambient air, the first port of the regulating air valve is controlled to be connected to the third port, and the second port of the regulating air valve is controlled to be closed.

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