Energy-saving heat exchange fresh air dehumidification system based on sunlight regulation

Abstract

The application relates to the technical field of energy-saving heat exchange devices, and provides an energy-saving heat exchange fresh air dehumidification system based on sunlight regulation, which comprises a machine shell, an air treatment channel arranged on the machine shell, an adsorption dehumidification module, a regeneration module, a sunlight sensing and trend prediction module and a control module, the adsorption dehumidification module is arranged in the air treatment channel and performs adsorption dehumidification treatment on the flowing fresh air; the regeneration module is connected with the adsorption dehumidification module and performs heat exchange regeneration on the adsorption material in the adsorption dehumidification module; the sunlight sensing and trend prediction module is installed outside the machine shell and is used for acquiring the sunlight intensity of the current environment and predicting the sunlight trend in a set time period; the control module is electrically connected with the sunlight sensing and trend prediction module and the regeneration module respectively, and whether the operation of the regeneration module is triggered in advance is judged according to the sunlight trend prediction result, so that the feedforward regulation and control of the regeneration time of the adsorption material is realized.

Description

Technical Field

[0001] This invention relates to the field of energy-saving heat exchange device technology, and in particular to an energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation. Background Technology

[0002] The adoption of fresh air dehumidification systems has become an important means of improving indoor comfort and health. Compared with traditional standalone ventilation or air conditioning dehumidification methods, heat recovery fresh air dehumidification systems reuse the heat energy of exhaust and intake air through sensible / latent heat exchange devices, which can significantly improve the system's coefficient of performance (COP) and reduce energy consumption. However, existing fresh air dehumidification systems still face problems such as large fluctuations in dehumidification capacity, limited energy efficiency, and unintelligent operation control when dealing with variable external climates, especially in the high humidity and heat environment of summer.

[0003] For example, Chinese patent CN101672501A discloses a regenerative adsorption dehumidification device. This system utilizes the condensation waste heat generated by the air conditioning refrigeration system as the regenerative energy for the adsorption rotary dehumidifier. Hot air guides the adsorption material within the regeneration sector, enabling the system to achieve cyclic dehumidification and regeneration. While it offers energy-saving improvements in heat recovery, regeneration triggering still relies on humidity thresholds and time control, lacking an active response mechanism to changes in the external environment, easily leading to dehumidification gaps or energy waste. Another example is the fresh air energy-saving heat pump rotary dehumidifier disclosed in Chinese utility model CN201706611U. This technology improves system dehumidification efficiency to some extent by introducing a wet film pre-cooling structure in conjunction with the heat pump system and the adsorption rotary dehumidifier. However, this solution still uses a fixed regeneration method and static airflow design, making it difficult to achieve dynamic heat load adjustment, and it does not optimize the regeneration strategy based on external environmental characteristics.

[0004] In addition, the existing technology also has the following drawbacks:

[0005] 1. Lacks feedforward control capability for regeneration operations, mostly based on current state or fixed strategy triggering, unable to actively respond to high humidity trends; 2. Simple air path structure, path switching heavily relies on electric drive actuators, resulting in high power consumption and susceptibility to failure, especially in renewable energy power supply scenarios with insufficient reliability; 3. Dehumidification mechanism lacks multi-level coordination capability, system energy efficiency and dehumidification effect are highly dependent on the external environment, and operation fluctuates significantly; 4. Low regeneration heat energy utilization efficiency, some systems do not effectively recover regenerated hot air or are not equipped with local thermal management devices.

[0006] This invention was developed to address common problems in the field, such as delayed regeneration response, single dehumidification path, high energy consumption during air path switching, low utilization rate of adsorption materials, and poor adaptability to external climate. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of current systems by proposing an energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation.

[0008] To overcome the shortcomings of the prior art, the present invention adopts the following technical solution:

[0009] An energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation is disclosed. The system includes a housing and an air handling duct disposed on the housing. The system further includes an adsorption dehumidification module, a regeneration module, a solar radiation sensing and trend prediction module, and a control module.

[0010] The adsorption dehumidification module is installed in the air handling channel and performs adsorption dehumidification treatment on the incoming fresh air;

[0011] The regeneration module is connected to the adsorption and dehumidification module and performs heat exchange regeneration on the adsorbent material in the adsorption and dehumidification module.

[0012] The solar radiation sensing and trend prediction module is installed on the outside of the casing and is used to obtain the solar radiation intensity of the current environment and predict the solar radiation trend within a set time period.

[0013] The control module is electrically connected to the solar radiation sensing and trend prediction module and the regeneration module respectively, and determines whether to trigger the operation of the regeneration module in advance based on the solar radiation trend prediction results, so as to realize the feedforward control of the regeneration timing of the adsorbent material.

[0014] Optionally, the sunshine sensing and trend prediction module includes a sunshine sensing unit, a data recording unit, and a trend evaluation unit. The sunshine sensing unit collects external sunshine data in real time, the data recording unit stores current sunshine data and historical sunshine data, and the trend evaluation unit predicts sunshine trend information within a set time period based on historical data, the current time period, and weather parameters.

[0015] The trend assessment unit outputs the prediction results to the control unit in the form of average solar irradiance.

[0016] Optionally, the control module includes a decision unit and a control unit. The decision unit compares the sunshine trend prediction result with a preset sunshine threshold to determine whether to trigger the regeneration module in advance. The control unit receives the decision signal from the decision unit and triggers the generation of a regeneration control signal to regulate the start-up timing and duration of the regeneration module.

[0017] Optionally, the regeneration module includes a solar collector, a hot air channel, a photothermal heat exchange unit, and an air handling channel. The solar collector is fixedly installed on the outer surface of the top of the casing and is used to absorb external sunlight and convert it into heat energy.

[0018] One end of the hot air channel is thermally connected to the solar collector, and the other end of the hot air channel passes through the casing and is connected to the regeneration section of the air handling channel. The hot air channel is used to guide hot air to the adsorption dehumidification module.

[0019] The photothermal heat exchange unit is arranged opposite to the adsorption dehumidification module. The photothermal heat exchange unit is used to receive the heat energy transmitted from the hot air channel and heat the adsorption material by means of heat conduction or radiation to achieve local regeneration. A heat energy conduction path is formed between the hot air channel and the photothermal heat exchange unit, and the photothermal heat exchange unit is directly thermally coupled to the regeneration area of ​​the adsorption dehumidification module.

[0020] Optionally, the adsorption dehumidification module includes a housing and a carrier unit, wherein the carrier unit is disposed in the housing and is used to place adsorption material.

[0021] Optionally, it also includes an indoor recirculation dehumidification module, which is used to dehumidify the indoor return air in indoor recirculation mode to improve indoor air comfort and humidity control accuracy.

[0022] The indoor circulating dehumidification module includes a primary condensation unit, a deep adsorption unit, a drainage and condensate guiding unit, and a sealed guiding cavity. The primary condensation unit is located at the air inlet of the indoor return air duct and is used to condense and precipitate some of the water vapor in the return air through cooling, thereby achieving primary dehumidification. The deep adsorption unit is connected in series downstream of the primary condensation unit and is used to further adsorb and remove residual moisture. The drainage and condensate guiding unit is located at the bottom of the primary condensation unit and is used to collect and discharge condensate. The sealed guiding cavity is used to limit the airflow path and ensure that the airflow flows through the primary condensation unit and the deep adsorption unit in sequence.

[0023] Optionally, the energy-saving heat exchange fresh air dehumidification system further includes an online status detection module. The online status detection module is used to monitor the operating status of the adsorption material in the adsorption dehumidification module in real time and evaluate its effective adsorption capacity. The online status detection module is installed near the air inlet and air outlet of the adsorption dehumidification module.

[0024] Optionally, the online status detection module includes a sensor unit, a data processing unit, and a data transmission interface. The sensor unit is used to detect the difference in dielectric properties or microwave signal attenuation when the airflow enters and leaves the adsorption material. The data processing unit is used to compare and analyze the detection data at the inlet and outlet to determine the real-time moisture content of the adsorption material and calculate its remaining effective adsorption capacity.

[0025] The data transmission interface is used to transmit the remaining effective adsorption capacity data to the control unit.

[0026] The data transmission interface is located in the data processing unit and is electrically connected to the control unit.

[0027] Optionally, a membrane dehumidification module is connected in series at the front end of the adsorption dehumidification module along the airflow direction of the outdoor channel.

[0028] Optionally, the membrane dehumidification module includes a hollow fiber membrane unit, a membrane support housing, and a dehumidification side channel. The hollow fiber membrane unit is fixedly installed in the air handling channel and is used for water vapor permeation based on the humidity gradient on both sides of the airflow to perform pre-dehumidification of the incoming air. The membrane support housing is sealed to the air handling channel, fixes the hollow fiber membrane unit, and limits the airflow path. The dehumidification side channel is used to exhaust the permeated water vapor to the outside of the housing, and the dehumidification side channel is connected to the permeation side of the hollow fiber membrane unit.

[0029] The membrane dehumidification module and the adsorption dehumidification module form a two-stage series dehumidification structure, wherein the membrane dehumidification module is responsible for reducing high humidity load, and the adsorption dehumidification module performs fine dehumidification.

[0030] The control unit is electrically connected to the membrane dehumidification module and the adsorption dehumidification module respectively. It is used to select the activation mode of the membrane module, the adsorption module or a combination mode of the two operating together, according to the ambient humidity and the system operating load, so as to realize multi-level collaborative dehumidification and flexible operation control.

[0031] The beneficial effects achieved by this invention are:

[0032] 1. Through the coordinated operation of the regeneration module and the solar radiation sensing and trend prediction module, the regeneration operation can be pre-scheduled according to the solar radiation intensity trend, making full use of solar energy resources, realizing low-energy regeneration processing, and ensuring that the entire system has the technical advantages of being green and environmentally friendly and having low operating costs.

[0033] 2. Through the cooperation of the solar radiation sensing and trend prediction module and the control module, the system can predict future solar radiation trends in advance and dynamically adjust the regeneration timing and energy allocation strategy accordingly, thereby ensuring that the system has adaptive energy-saving control capabilities and improving the overall energy utilization efficiency of operation.

[0034] 3. Through signal interaction between the adsorption and dehumidification module and the control module, the control module can obtain the operating status and remaining effective adsorption capacity of the adsorption material in real time, thereby realizing the linkage control of the adsorption section and the regeneration section, ensuring that the entire system has the advantages of intelligent operation and efficient dehumidification.

[0035] 4. Through the coordinated operation of the adsorption dehumidification module and the regeneration module, the adsorption material can enter the regeneration state in a timely manner after completing the efficient adsorption of moisture in the air, thereby effectively avoiding the decrease in dehumidification efficiency caused by adsorption saturation and ensuring that the entire system has continuous and stable dehumidification performance.

[0036] 5. Through the synergy of the adsorption dehumidification module, regeneration module, sunlight sensing and trend prediction module, and control module, the system possesses integrated capabilities from environmental perception, trend prediction, logical judgment to execution control, ensuring that the entire system has comprehensive performance advantages such as high dehumidification efficiency, strong intelligent response capability, low energy consumption, and strong adaptability. Attached Figure Description

[0037] The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate the same parts.

[0038] Figure 1 This is a front view schematic diagram of the indoor air outlet of the present invention.

[0039] Figure 2 This is a top view schematic diagram of the internal components of the present invention.

[0040] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0041] Figure 4 for Figure 2 Enlarged schematic diagram of section C.

[0042] Figure 5 for Figure 2 Enlarged schematic diagram of section D in the middle.

[0043] Figure 6 for Figure 2 Schematic diagram of cross-section at point BB.

[0044] Figure 7 for Figure 6 Diagram of E in the middle.

[0045] Figure 8 for Figure 2 Enlarged schematic diagram of the middle H section.

[0046] Figure 9 for Figure 6 Enlarged schematic diagram of section F in the middle.

[0047] Figure 10 This is a cross-sectional schematic diagram of the solar collector panel and hot air channel of the present invention.

[0048] Figure 11 This is a schematic diagram showing the internal details of the hot air channel of the present invention.

[0049] Figure 12 for Figure 2 A detailed schematic diagram of the F-frame in the middle.

[0050] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Air outlet; 3. Air inlet; 4. Temperature control component; 5. Heat exchange coil; 6. Inlet fan; 7. Liquid collection tank; 8. Adsorbent carrier frame; 9. Adsorbent material layer; 10. Return air channel; 11. Guide pipe; 12. Electric drain pump; 13. Dehumidification pipe; 14. On / off valve; 15. Air duct; 16. Solenoid valve; 17. Solar collector panel; 18. Air handling channel; 19. Hollow fiber membrane; 20. Membrane support housing; 21. Dehumidification side channel; 22. Connecting rod; 23. Temperature sensor; 24. Air valve; 5. Connecting channel; 26. Hot air channel; 27. Movable chamber; 28. Dehumidification pipe; 29. ​​Dehumidification tray; 30. Turntable; 31. Pull-out rope; 32. Sealing gasket; 33. Placement cavity; 34. Adsorbent material; 35. Sliding track; 36. Material placement cavity; 37. Sliding seat; 38. Rotation drive mechanism; 39. Stand; 40. Pull-out plug; 41. Drive gear; 42. Fixed toothed belt; 43. Absorbent coating; 44. Heat-conducting fins; 45. Magnetic seat; 46. Magnetic component; 47. Return air channel; 48. Dielectric response sensor; 49. Dehumidification tray. Detailed Implementation

[0051] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present invention. Furthermore, the accompanying drawings of the present invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated beforehand. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention.

[0052] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, this embodiment provides an energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation. The energy-saving heat exchange fresh air dehumidification system includes a housing 1 and an air handling channel 18 disposed on the housing 1. The energy-saving heat exchange fresh air dehumidification system also includes an adsorption dehumidification module, a regeneration module, a solar radiation sensing and trend prediction module, and a control module. The adsorption dehumidification module is disposed in the air handling channel 18 and performs adsorption dehumidification treatment on the fresh air flowing through it.

[0053] The regeneration module is connected to the adsorption and dehumidification module and performs heat exchange regeneration on the adsorbent material 34 in the adsorption and dehumidification module.

[0054] The solar radiation sensing and trend prediction module is installed on the outside of the housing 1 and is used to obtain the solar radiation intensity of the current environment and predict the solar radiation trend within a set time period.

[0055] The control module is electrically connected to the solar radiation sensing and trend prediction module and the regeneration module respectively, and determines whether to trigger the operation of the regeneration module in advance based on the solar radiation trend prediction results, so as to realize the feedforward control of the regeneration timing of the adsorbent material 34.

[0056] In this embodiment, the energy-saving heat exchange fresh air dehumidification system also includes a central processing unit (CPU). The CPU is connected to the adsorption dehumidification module, the regeneration module, the sunlight sensing and trend prediction module, and the control module. The CPU centrally controls the adsorption dehumidification module, the regeneration module, the sunlight sensing and trend prediction module, and the control module to improve the dehumidification efficiency and effect of the entire system.

[0057] The central processing unit (CPU) is embedded in a circuit board or PCB and is electrically connected to the adsorption and dehumidification module, the regeneration module, the sunlight sensing and trend prediction module, and the control module. Simultaneously, the CPU is located in the electrical control area within the housing 1, embedded in the circuit board or PCB, serving as the centralized control core of the system.

[0058] In addition, the energy-saving heat exchange fresh air dehumidification system also includes a power supply module, which supplies power to the central processing unit, the adsorption dehumidification module, the regeneration module, the sunlight sensing and trend prediction module, and the control module so that the central processing unit, the adsorption dehumidification module, the regeneration module, the sunlight sensing and trend prediction module, and the control module can operate normally.

[0059] The power supply module includes power supply devices, voltage regulators and rectifiers. The power supply module is a commonly used power supply device and component, often used in the rectifier components of air conditioners. It is a component or module commonly used by those skilled in the art, and therefore will not be described in detail in this embodiment.

[0060] The casing 1 is preferably fixedly installed on the exterior wall or roof of a building. The air inlet 3 of the air handling duct 18 is installed through the wall or roof to communicate with the outdoor air. The air outlet 2 is located at the indoor end to supply fresh air that has undergone dehumidification and heat exchange treatment into the room. The solar collector 17 is preferably installed in a sunny location on the roof or exterior wall to achieve optimal utilization of sunlight.

[0061] Optionally, the sunshine sensing and trend prediction module includes a sunshine sensing unit, a data recording unit, and a trend evaluation unit. The sunshine sensing unit collects external sunshine data in real time, the data recording unit stores current sunshine data and historical sunshine data, and the trend evaluation unit predicts sunshine trend information within a set time period based on historical data, the current time period, and weather parameters.

[0062] The trend assessment unit outputs the prediction results to the control unit in the form of average solar irradiance.

[0063] The sunlight sensing unit includes at least one light intensity sensor and a support plate. The support plate is disposed on the outer wall of the housing 1 and communicates with the external environment. At least one light sensor is evenly distributed on the support plate and collects external light data in real time.

[0064] The data recording unit includes a memory and a time recording component. The time recording component records the corresponding time when light data is collected by at least one light sensor and generates a corresponding time tag. The memory stores the light data collected by at least one light sensor and the time tag corresponding to the light data.

[0065] The trend assessment unit acquires the historical data, the current time period, and weather parameters, and processes them according to the following steps:

[0066] S1. The photosensitive sensor (photodiode or silicon photosensitive sensor) outputs an electrical signal, which is then converted into a digital light intensity value Ireal by an analog-to-digital converter (ADC), with the unit W / m².

[0067] Historical data acquisition: Retrieving historical light intensity sequences from data recording units {I h (t)}, the time interval can be 1 to 5 minutes, covering the past 2 to 24 hours.

[0068] Weather parameter reception: Environmental parameters such as temperature (T) are acquired through interfaces with external meteorological databases or local sensors. out Humidity H out Cloud cover coefficient C.

[0069] S2. Based on step S1, perform anomaly removal and smoothing on the collected data:

[0070] Abnormal removal: If If the value is not specified, the point is considered an anomaly and discarded; where I... real This represents the real-time light intensity value currently collected by the sunlight sensing unit; I prev σ represents the illumination intensity value at the previous sampling time (i.e., the illumination intensity at time t-Δt). σ is the standard deviation of the historical data, which is calculated by applying a sliding window to the historical illumination data. Specifically, the mean μ is calculated from the illumination sequence of the most recent N sampling points, and the standard deviation is obtained accordingly. ;

[0071] Smoothing: Historical data is filtered using an exponentially weighted average (EWMA).

[0072] ;

[0073] In the formula, I smooth (t) represents the smoothed illumination intensity value at the current time t, I h I represents the original light intensity data value at the current moment. smooth (t-1) represents the smoothed light intensity value at the previous time (i.e., t-Δt), and α is the smoothing coefficient (0.2~0.5). In this embodiment, an example of a value is provided: 1) For a sunny summer day with stable light changes (the solar intensity curve is relatively smooth with small fluctuations), the smoothing coefficient α = 0.2; 2) For a cloudy day with rapidly fluctuating light (frequent cloud cover and large changes in light intensity in a short period of time), the smoothing coefficient α = 0.5; 3) For a cloudy winter day with low light environment (the overall light intensity is low, but the trend of change is relatively gentle), the smoothing coefficient α = 0.3. In this embodiment, different smoothing coefficients α can be selected or set for different scenarios and input from the human-computer interaction interface. Therefore, in this embodiment, they will not be described in detail.

[0074] S3. Based on step S2, perform a rate of change analysis on the smooth curve, and the trend evaluation unit calculates the slope k of the current light intensity: ;

[0075] In the formula, I smooth (t) represents the smoothed illumination intensity value at the current time t, I smooth(t-1) is the smoothed illumination intensity value at the previous time (i.e., t-Δt), where Δt is the time interval between the two sampling points;

[0076] If k > δ1, it is determined to be an increasing trend; if k < -δ2, it is determined to be a decreasing trend; otherwise, it is determined to be stable.

[0077] Among them, δ1 and δ2 are empirical thresholds for judgment. Their values ​​are obtained by statistically analyzing the solar intensity change curves under different seasons and typical climatic conditions to obtain the rate of change distribution per unit time (within 5 min or 10 min of solar radiation).

[0078] In this embodiment, on sunny summer days, the rate of increase in solar radiation is typically +8 to +12 W / m²·min; when obscured by clouds, the rate of decrease is typically -10 to -15 W / m²·min.

[0079] Then we can obtain: δ1 ≈ 10 W / m²·min; δ2 ≈ 12 W / m²·min.

[0080] Furthermore, by incorporating the time factor to correct the trend, in this embodiment, when it is evening, even if the slope is close to zero, it is corrected to a weakening trend.

[0081] S4. Based on step S3, the trend evaluation unit establishes a prediction model according to the identified trend to obtain the light intensity distribution for future time periods (using a second-order polynomial as an example):

[0082] ;

[0083] Among them, I pred (t+τ) represents the predicted light intensity at a future time t+τ (unit: W / m²). 2 τ represents the prediction duration; the coefficients a0, a1, a2 are obtained by fitting smoothed illumination data over a recent period using the least squares method, and are updated in real time during operation using recursive least squares to ensure prediction accuracy. Preferably, the time window is the most recent 30 minutes to 2 hours, and the prediction step size τ is 5 minutes to 30 minutes.

[0084] Additionally, a0 is a constant term representing the baseline solar radiation intensity at the current moment (e.g., the average value over a past period or the intercept of the fitted curve at τ=0). In this embodiment, a0 = I. smooth (t), that is, the value of the constant term a0 is assumed to be the weighted average light intensity I. smooth (t).

[0085] a1 is the linear coefficient, representing the linear trend of solar radiation intensity over time (i.e., the rate of increase or decrease). In this embodiment, it is set as: linear coefficient a1 = clip(k, [λ1, λ2]), where k is the slope of the current solar radiation intensity, λ1 and λ2 are preset parameters, using the common interval [-120, +120]; clip() is the limiting function, which restricts this rate of change to a reasonable range.

[0086] a2 is the quadratic coefficient, representing the acceleration of the trend, used to describe the curvature of the solar radiation intensity curve (e.g., rapid increase, slowdown, or attenuation). In this embodiment, it is set as follows: ;

[0087] In the formula, β is the adjustment coefficient, with a value range of [0.5, 1.0]. In this embodiment, the default adjustment coefficient is set to β = 0.7; k(t) is the rate of change of light intensity at the current moment, i.e., The unit is W / m 2 ·min -1 k(t-Δt) is the rate of change of light intensity at the previous moment;

[0088] In the above formula, This represents the rate of change of illumination. A positive value indicates that the rate of illumination increase is accelerating. A negative value indicates that the rate of illumination decrease is accelerating; [a2] min a2 max ] represents the system preset range, indicating the allowable acceleration range. In this embodiment, the preset range is set to [-5, +5].

[0089] Based on the obtained future light intensity distribution, cloud cover correction is introduced into the forecast results in conjunction with weather parameters:

[0090] ;

[0091] In the formula, I adj (t+τ) represents the corrected predicted solar irradiance (unit: W / m²). 2 ), I pred (t+τ) represents the predicted light intensity at a future time t+τ (unit: W / m²). 2 C is the cloud cover coefficient. In this embodiment, it is set as follows: sunny: C=0.05, cloudy: C=0.2, rainy: C=0.4. The specific value is selected according to the actual situation.

[0092] Through the above process, the corrected light intensity prediction curve {I} is obtained. adj (t+τ)}.

[0093] S5. Based on step S4, the predicted curves for future time periods are averaged to obtain the average solar irradiance I. avg (Unit: W / m) 2 ):

[0094] ;

[0095] In the formula, T is the length of the pre-test time window, which can be set by the operator or user, and the default value is 2 hours. τ is the integration variable, representing the offset of a future time point relative to the current time, and its value is a dummy variable in the integration process. In this embodiment, the system defaults to Δτ = 5 minutes, which can be modified by the user in the system menu.

[0096] Among them, recent data has a higher weight, and the average solar irradiance I avg The output is sent to the control module, which then compares it with the preset threshold I. th The comparison is made to determine whether to trigger the regeneration module to run ahead of schedule.

[0097] The casing is preferably fixedly installed on the exterior wall of the building. The air inlet of the air handling duct is installed through the wall or ceiling and communicates with the outdoor air. The air outlet is located at the indoor end to supply fresh air that has undergone dehumidification and heat exchange treatment into the room. The solar collector is preferably installed on the roof or exterior wall in a sunny location to achieve optimal utilization of sunlight.

[0098] Inside the casing, the air handling channel is sequentially equipped with the adsorption ends of a membrane dehumidification module and an adsorption dehumidification module. The membrane dehumidification module is used for pre-dehumidification of high-humidity fresh air, while the adsorption dehumidification module is used for deep dehumidification of the fresh air entering the air handling channel.

[0099] like Figure 2 As shown, the adsorption dehumidification module includes an adsorption end and a heat exchange regeneration end. The adsorption end is used to dehumidify the incoming outdoor air, and the heat exchange end is used by the regeneration module to regenerate the adsorption material in the adsorption dehumidification module through heat exchange.

[0100] The adsorption end is positioned facing the side of the air handling channel, and the heat exchange regeneration end is positioned facing the side of the hot air channel.

[0101] The regeneration module is connected to the heat exchange regeneration end of the adsorption dehumidification module through a hot air channel, and achieves local thermal coupling with the adsorption material through a photothermal heat exchange unit to complete the regeneration of the adsorption material.

[0102] In addition, the air handling channel is connected to the regeneration section outlet to discharge the water vapor released during the regeneration process to the outside of the casing.

[0103] The solar radiation sensing and trend prediction module is located on the outer surface of the casing. It is used to collect external light intensity and predict the solar radiation trend in the future, and transmit the prediction results to the control module.

[0104] The control module is installed in the electrical control area inside the housing and is electrically connected to the adsorption dehumidification module, the regeneration module, and the sunlight sensing and trend prediction module. The control module is used to schedule the start and stop timing of the regeneration module based on the sunlight trend prediction results and the real-time operating status of the adsorption module, control the working status of the air path switching unit, and coordinate the start and stop combination of the membrane dehumidification module and the adsorption dehumidification module.

[0105] Optionally, the control module includes a decision unit and a control unit. The decision unit compares the predicted sunshine trend with a preset sunshine threshold to determine whether to trigger the regeneration module in advance. The control unit receives the decision signal from the decision unit and triggers the generation of a regeneration control signal to regulate the timing and duration of the regeneration module's activation.

[0106] The decision-making unit determines whether to trigger the regeneration module prematurely based on the following steps:

[0107] S11, Receive the average solar intensity I output from the solar radiation sensing and trend prediction module. avg And trend parameters (in this embodiment, trend parameters include: enhancement, stability, and weakening); wherein, if k > δ1, it is determined to be an enhancement state, indicating that the solar radiation intensity is rapidly increasing; if k < -δ2, it is determined to be a weakening state, indicating that the solar radiation intensity is decreasing; if δ1 ≤ k ≤ δ2, it is determined to be a stable state, indicating that the solar radiation intensity has no significant change.

[0108] Receive the remaining effective adsorption capacity C of the adsorbent material from the online status monitoring module. remain ;

[0109] S12, Calculate the average solar irradiance and the remaining effective adsorption capacity C of the adsorbent material. remain and the preset or set regeneration trigger solar radiation threshold I th Set a lower capacity threshold C th Compare;

[0110] If I avg ≥I th And C remain ≤C th If I determines that regeneration needs to be triggered immediately; avg <I th However, if the trend is strengthening, then it will enter the regeneration preparation state ahead of schedule; if C remain >C th If this happens, regeneration will be delayed.

[0111] S13. Generate the judgment result and output the logic control signal;

[0112] When the regeneration trigger signal is 1, the regeneration module is started; when the regeneration trigger signal is 0, it remains in standby mode.

[0113] In this embodiment, the specific working process of the control unit is as follows: after receiving the trend parameters and regeneration trigger signal output by the decision unit, it combines the online status detection data of the adsorption dehumidification module to generate corresponding execution instructions, and controls the start-up timing and duration of the regeneration module through the electronic control interface.

[0114] When the trend parameter is determined to be increasing, the control unit will delay or shorten the regeneration operation to avoid energy waste;

[0115] When the trend parameter is determined to be weakening, the regeneration module is triggered in advance to ensure that the adsorbent material has sufficient dehumidification capacity;

[0116] When the trend is determined to be stable, regular regeneration is performed according to the real-time load of the adsorption module.

[0117] The control unit can dynamically adjust the regeneration duration during execution, realizing intelligent, feedforward regeneration management of the adsorbent material, thereby improving the dehumidification efficiency and energy efficiency ratio of the entire system.

[0118] The control process of the control unit includes:

[0119] S21, Receive the regeneration trigger signal from the decision-making unit;

[0120] S22. Calculate the activation timing:

[0121] If the regeneration trigger signal is 1, the regeneration module is activated immediately;

[0122] If the trigger signal is 0, but the trend is increasing, set a delay timer (set to delay for 10-15 minutes before making another judgment) to avoid frequent switching.

[0123] S23. Determine the regeneration duration T. regen : ;

[0124] In the formula, T0 is the baseline regeneration time, which can be determined experimentally; C remain C represents the remaining effective adsorption capacity of the current adsorbent material (measured by the online status monitoring module). max The maximum adsorption capacity of the adsorbent material is determined by the physical properties of the selected adsorbent material. It can be determined experimentally or by referring to the material specification and is used as a fixed parameter in system design. I represents the saturation coefficient of the adsorbent material; the lower the capacity, the larger the value. avg The average solar irradiance (W / m²) output by the trend assessment unit; I ref For reference solar radiation intensity (in this embodiment, it is set to 600 W / m², representing the standard sunny day level); : To prevent small constants with zero denominators (such as 1 W / m²); γ(I trend () is the trend correction coefficient, assigned a value based on the trend status:

[0125] If the trend is in an enhancing state (Delay or shorten regeneration time); if the trend is stable, If the trend weakens, (Advance or extend the regeneration time).

[0126] In this embodiment, the baseline regeneration time T0 was obtained through experimental calibration. Specifically, under standard operating conditions of 30°C and 80% relative humidity, the T0 values ​​for different adsorbent materials are as follows: When using 13X molecular sieve, T0 is approximately 30 min; when using silica gel, T0 is approximately 25–35 min; when using activated alumina, T0 is approximately 35–45 min; and when using a composite molecular sieve / silica gel material, T0 is approximately 20–30 min. In this embodiment, the system's T0 is generally within the range of 20–45 min and needs to be adjusted according to the selected material.

[0127] In this embodiment, the reference solar radiation intensity I ref Used as a benchmark value for predicting solar radiation trends. Under standard conditions, I ref A value of 600 W / m² can be used to represent the typical sunny solar intensity at noon on a south-facing facade or roof in mid-latitude regions (30°N~40°N).

[0128] In practical applications, I ref Adjustments are made based on the latitude and longitude of the installation location, the orientation of the casing, and seasonal differences.

[0129] 20°~30° North latitude, south-facing roof: I ref Generally, 700~800 W / m² is used; 40°~50° North latitude, south-facing roof: I ref Generally, 500~600 W / m² is used; for east-west facing exterior walls: midday period I ref Approximately 300~450 W / m²; Winter (low solar altitude angle): I ref It can be reduced to 250~400 W / m².

[0130] In short, Iref It is not a fixed value, but is determined based on the latitude and longitude, orientation, and seasonal lighting conditions of the system installation location.

[0131] In this embodiment, for ease of explanation, I is preferred. ref = 600 W / m² as the standard sunny day level.

[0132] Optionally, the regeneration module includes a solar collector 17, a hot air channel 26, a photothermal heat exchange unit, and an air handling channel 18. The solar collector 17 is fixedly installed on the outer surface of the top of the housing 1 and is used to absorb external sunlight and convert it into heat energy.

[0133] One end of the hot air channel 26 is thermally connected to the solar collector plate 17, and the other end of the hot air channel 26 passes through the casing 1 and is connected to the heat exchange regeneration end of the adsorption dehumidification module. The hot air channel 26 is used to guide hot air to the adsorption dehumidification module.

[0134] The photothermal heat exchange unit is arranged opposite to the adsorption dehumidification module. The photothermal heat exchange unit is used to receive the heat energy transmitted from the hot air channel 26 and heat the adsorption material 34 by means of heat conduction or radiation to achieve local regeneration.

[0135] The hot air channel 26 forms a heat conduction path with the photothermal heat exchange unit.

[0136] The hot air channel 26 is located below and connected to the solar collector plate 17. When sunlight shines on the solar collector plate 17, the heat-absorbing coating substrate on the solar collector plate 17 heats up rapidly. The heat is transferred to the air in the channel through heat conduction or radiation, raising the air temperature in the hot air channel 26. The heated air in the hot air channel 26 is then introduced into the hot air channel 26 by a fan and further transported to the heat exchange regeneration end of the adsorption dehumidification module to provide heat for adsorbent regeneration.

[0137] In this embodiment, the adsorption dehumidification module is a rotary structure, wherein the adsorption material 34 (such as molecular sieve or silica gel) is uniformly loaded on a porous matrix or honeycomb carrier.

[0138] When the fresh air flows through the adsorption end of the adsorption dehumidification module, the adsorption material 34 comes into contact with the humid air, and water molecules are captured, thus achieving air dehumidification.

[0139] The heat exchange regeneration end of the adsorption dehumidification module is used to receive hot air from the hot air channel 26 to heat and remove moisture from the adsorption material 34, thereby restoring its adsorption capacity.

[0140] The outlet of the hot air channel 26 is directly opposite the heat exchange regeneration end of the adsorption dehumidification module, allowing the heated air to directly pass through the adsorption material 34 in the heat exchange regeneration end. The regenerated air comes into direct contact with the surface of the adsorption material 34, and through convection heat transfer and steam diffusion processes, the adsorbed water molecules are expelled and carried away by the airflow.

[0141] The photothermal heat exchange unit includes a heat-conducting shell, an absorption coating 43, and heat-conducting fins 44. The heat-conducting shell is made of copper alloy or aluminum alloy and is installed on the inner wall of the regeneration section to quickly receive the heat energy from the hot air channel 26 and form a uniform temperature field on the shell surface. The absorption coating 43 is coated on the inner wall surface of the heat-conducting shell and is preferably a carbon-based nano-coating or a TiO2 / SiO2 multilayer film. The absorption coating 43 has a high solar spectrum absorption rate and far-infrared radiation capability, which can improve the heat capture and re-radiation efficiency.

[0142] Several heat-conducting fins 44 are arranged circumferentially along the inner wall of the heat-conducting shell. The heat-conducting fins 44 are made of high thermal conductivity metal. The increased heat exchange area allows the hot air in the hot air channel 26 to act on the surface of the adsorption material 34, thereby achieving localized heating.

[0143] When the substrate of the absorption coating 43 is heated, the heat energy is conducted to the hot air channel 26 that is close to its back through heat conduction.

[0144] The hot air channel 26 is equipped with a fan. When the heated air is guided to the regeneration section of the adsorption and dehumidification module by the fan, the heat required for the regeneration of the adsorbent is supplied.

[0145] Through the coordinated operation of the regeneration module and the solar radiation sensing and trend prediction module, the regeneration operation can be pre-scheduled according to the solar radiation intensity trend, making full use of solar energy resources, achieving low-energy regeneration processing, and ensuring that the entire system has the technical advantages of being green, environmentally friendly, and having low operating costs.

[0146] Optionally, the adsorption dehumidification module includes a housing and a carrier unit, wherein the carrier unit is disposed in the housing and is used to place the adsorption material 34.

[0147] The carrier unit includes a turntable 30, a movable cavity 27, a sliding track 35, a sliding seat 37, a magnetic suction component 46, a magnetic suction seat 45, and at least two material placement cavities 36 symmetrically arranged on the turntable 30. The central axis of the turntable 30 is connected to one end of a connecting rod 22, and the other end of the connecting rod 22 is connected to the sliding seat 37. The sliding seat 37 is slidably connected to the sliding track 35. One side wall of the sliding seat 37 is configured as a pull-out end, and the magnetic suction component 46 is disposed on the side wall of the sliding seat 37 away from the pull-out end. Figure 4As shown, the movable cavity 27 is vertically disposed in the hot air channel 26 and the air handling channel 18, and passes through the housing; the sliding track 35 is disposed on the inner walls of both sides of the movable cavity 27, the magnetic seat 45 is disposed on the bottom wall of one side of the movable cavity 27, and the other side of the movable cavity 27 is provided as a pull-out opening.

[0148] The carrier unit further includes a pull rope 31 and a pull plug 40. One end of the pull rope 31 is connected to the side wall of the sliding seat 37 facing the pull opening. The other end of the pull rope 31 extends towards the side of the pull opening and is placed in the placement cavity 33 of the pull plug 40. The pull plug 40 has an inner cavity and is used to seal the pull opening.

[0149] The hot air duct 26 and the air handling duct 18 are set independently of each other, and the rotation of the turntable 30 is switched between the hot air duct 26 and the air handling duct 18.

[0150] The surface of the turntable 30 is provided with a sealing gasket 32, which surrounds the outer edge of the storage cavity on the turntable 30, thereby sealing the storage cavities during the conversion process and preventing air leakage between the hot air channel 26 and the air handling channel 18.

[0151] like Figure 8 As shown, the carrier unit also includes a dehumidification trough 49, a dehumidification pipe 13, and an on / off valve 14 disposed on the dehumidification pipe 13. The dehumidification trough 49 is disposed below the turntable 30 and forms a concave drainage channel for the absorbent material to absorb moisture. One end of the dehumidification pipe 13 is connected to the bottom wall of the dehumidification trough 49, and the other end of the dehumidification pipe 13 extends outdoors to form a drainage passage.

[0152] like Figure 5 As shown, the carrier unit also includes a dehumidification tank 29, a dehumidification pipe 28, and a dehumidification electronic valve disposed on the dehumidification pipe 28. The dehumidification tank 29 is disposed below the turntable 30 (without affecting the rotation of the turntable 30) and receives the water vapor generated by the adsorbent material 34 on the turntable 30 during the hot air drying process supplied by the hot air channel 26, so that the water vapor can have a path to dissipate. One end of the dehumidification pipe 28 is connected to the dehumidification tank 29, and the other end of the dehumidification pipe 28 extends out of the housing to form a dehumidification passage (in other embodiments, the rear section of the dehumidification passage can share an outlet with the tail section of the guide pipe 11).

[0153] The carrier unit further includes a conversion component, which is disposed on the sliding seat 37 and drives the turntable 30 to rotate along the central axis. The conversion component includes a rotation drive mechanism 38, a stand 39, a drive gear 41, and a fixed toothed belt 42. One end of the stand 39 is disposed on the sliding seat 37, and the other end of the stand 39 extends toward one side of the sliding seat 37. The rotation drive mechanism 38 is disposed on the stand 39 and fixedly connected to the stand 39. The drive shaft of the rotation drive mechanism 38 is connected to the drive gear 41. The fixed toothed belt 42 is provided on the outer wall surface of the turntable 30, and the drive gear 41 meshes with the fixed toothed belt 42.

[0154] like Figure 6 or Figure 7 As shown, during the process of switching the turntable 30, the central processing unit controls the rotation drive mechanism 38 to drive the drive gear 41, which in turn drives the fixed toothed belt 42 on the turntable 30 to rotate, thereby realizing the rotation operation of the turntable 30. This allows the adsorbent material 34 on the turntable 30 to be switched, thus switching between excess adsorbent material 34 and dried adsorbent material 34. The dried adsorbent material 34 is aligned with the air treatment channel 18, and the excess adsorbent material 34 is aligned with the hot air channel 26. After the conversion between excess adsorbent material 34 and dried adsorbent material 34, the dehumidification and drying operations can continue, improving the utilization rate of the adsorbent material 34.

[0155] During rotation, alignment is achieved using a positioning tag and an identification probe mounted on the turntable 30. The identification probe is mounted on the turntable 30, and the positioning tag can be positioned at the edge of the hot air duct 26 and the air handling duct 18.

[0156] In this embodiment, the alignment process includes: when the central processing unit controls the rotation drive mechanism 38 to rotate the turntable 30, the identification probe continuously detects the positioning tag signal it passes and feeds it back to the central processing unit; the central processing unit matches and compares the identification probe signal with the tag corresponding to the target adsorption block; when the identification probe detects the target tag, the central processing unit issues a deceleration and finally stops the turntable 30, achieving precise alignment and locking. Thus, after the adsorption material 34 on the turntable 30 has completed its conversion, dehumidification and regeneration operations can be carried out simultaneously, significantly improving the overall system operating efficiency and the utilization rate of the adsorption material 34.

[0157] The positioning tag is composed of RFID tag or optical encoding mark; the identification probe is used to identify the corresponding tag signal and feed it back to the central processing unit in real time.

[0158] Optionally, the adsorption dehumidification module further includes an air path switching unit, which is located between the hot air channel 26 and the outdoor air inlet channel, and controls the connection between the two.

[0159] The air path switching unit includes a connecting channel 25, an air valve 24, and at least two temperature sensors 23. The connecting channel 25 is bridged between the hot air channel 26 and the air handling channel 18. The air valve 24 is disposed in the connecting channel 25. At least two sensors are disposed at the connection between the connecting channel 25 and the hot air channel 26 and the air handling channel 18. At least two temperature sensors 23 collect the temperature of the hot air channel 26 and the outdoor channel.

[0160] The air valves 24 are all made of shape memory alloy drive plates or bimetallic plates, and use temperature changes to achieve mechanical switching without electric drive.

[0161] The control unit is coupled to the mechanical triggering structure of the air valve 24, and is used to control the switching of the airflow path through temperature control or mechanical threshold setting.

[0162] In this embodiment, when the adsorbent material 34 is in a non-dehumidification state, the hot air from the hot air channel 26 is directly applied to the external air supply channel, so that the external air can be directly heated and dehumidified before being directly supplied to the room.

[0163] By working together with the solar radiation sensing and trend prediction module and the control module, the system can predict future solar radiation trends in advance and dynamically adjust the regeneration timing and energy allocation strategy accordingly, thereby ensuring that the system has adaptive energy-saving control capabilities and improving the overall energy utilization efficiency of operation.

[0164] Optionally, the energy-saving heat exchange fresh air dehumidification system further includes an online status detection module. The online status detection module is used to monitor the operating status of the adsorption material 34 in the adsorption dehumidification module in real time and evaluate its effective adsorption capacity. The online status detection module is installed near the air inlet and air outlet of the adsorption dehumidification module.

[0165] Optionally, the online status detection module includes a sensor unit, a data processing unit, and a data transmission interface. The sensor unit is used to detect the difference in dielectric properties or microwave signal attenuation when the airflow enters and leaves the adsorption material 34. The data processing unit is used to compare and analyze the detection data at the inlet and outlet to determine the real-time moisture content of the adsorption material 34 and calculate its remaining effective adsorption capacity.

[0166] The data transmission interface is used to transmit the remaining effective adsorption capacity data to the control unit.

[0167] The data transmission interface is located in the data processing unit and is electrically connected to the control unit.

[0168] The sensor unit includes two dielectric response sensors 48 or microwave resonant sensors, which are fixedly installed at the air inlet and air outlet of the adsorption dehumidification module, respectively, to detect the electrical parameters of the airflow when it enters and leaves the adsorption material 34 (in this embodiment, the electrical parameters include: dielectric constant, microwave signal attenuation amplitude, etc.) to reflect the change in water vapor content in the air.

[0169] The air inlet sensor is installed inside the air duct at the front of the carrier unit, and the air outlet sensor is installed near the end of the adsorption material 34 or at the outlet channel of the shell.

[0170] The data processing unit is integrated in the electrical control area inside the housing 1 and is electrically connected to the aforementioned sensor unit. The data processing unit includes an analog-to-digital converter (ADC) and a microprocessor module (MCU).

[0171] The analog-to-digital converter (ADC) receives the raw electrical signals acquired by the sensor unit.

[0172] The microprocessor module (MCU) performs filtering, calibration, and normalization on the signal;

[0173] The microprocessor module (MCU) calculates the humidity difference between the inlet and outlet air vents or the corresponding signal attenuation ratio.

[0174] The microprocessor module (MCU) uses empirical formulas or lookup tables to estimate the current water content of the adsorbent material 34;

[0175] The microprocessor module (MCU) estimates the moisture content W according to the following formula: ;

[0176] In the formula, Sin is the microwave signal strength at the air inlet (i.e., the original signal), Sout is the microwave signal strength at the air outlet (after attenuation), and S... ref A is the reference signal intensity (signal under dry material conditions); A and B are empirical parameters obtained based on experimental calibration. In this embodiment, they are set as: A=1.2, B=0.8.

[0177] The microprocessor module (MCU) estimates the remaining effective adsorption capacity C based on the trend of moisture content change. remain :

[0178] ;

[0179] In the formula, C maxThe maximum adsorption capacity (unit: g / g) of the selected adsorbent material is given in this embodiment of the invention. Under standard environmental conditions (temperature 25~30 ℃, relative humidity around 80%), if the selected adsorbent material is 13X molecular sieve, the maximum adsorption capacity C is... max =0.3; if the selected adsorption material is silica gel, then the maximum adsorption capacity C max =0.38; if the selected adsorption material is activated alumina, then the maximum adsorption capacity C max =0.22; If the selected adsorption material is a composite molecular sieve / silica gel, then the maximum adsorption capacity C max =0.42;

[0180] The data transmission interface is located within the data processing unit, and is preferably a TTL serial port, RS-485 interface, or Bluetooth Low Energy (BLE) module. The data transmission interface is used to send the calculation results to the control unit.

[0181] The communication between the data transmission interface and the control module preferably uses a serial data protocol (such as Modbus RTU) to ensure stable and interference-resistant data transmission; the communication frequency is preset to upload data once every 5 minutes, but can also be triggered by the control unit command.

[0182] Through signal interaction between the adsorption dehumidification module and the control module, the control module can obtain the operating status and remaining effective adsorption capacity of the adsorption material 34 in real time, thereby realizing the linkage control of the adsorption section and the regeneration section, ensuring that the entire system has the advantages of intelligent operation and efficient dehumidification.

[0183] Optionally, a membrane dehumidification module is connected in series at the front end of the adsorption dehumidification module along the airflow direction of the outdoor channel.

[0184] In this embodiment, the membrane dehumidification module is used to perform pre-dehumidification treatment on the high-humidity fresh air entering the system, and it achieves selective permeation of water vapor based on the hollow fiber membrane structure.

[0185] Through the coordinated operation of the adsorption dehumidification module and the regeneration module, the adsorption material 34 can enter the regeneration state in a timely manner after completing the efficient adsorption of moisture in the air, thereby effectively avoiding the decrease in dehumidification efficiency caused by adsorption saturation and ensuring that the entire system has continuous and stable dehumidification performance.

[0186] Through the synergy of the adsorption dehumidification module, regeneration module, sunlight sensing and trend prediction module, and control module, the system possesses integrated capabilities from environmental perception, trend prediction, logical judgment to execution control, ensuring that the entire system has comprehensive performance advantages such as high dehumidification efficiency, strong intelligent response capability, low energy consumption, and strong adaptability.

[0187] Optionally, the membrane dehumidification module includes a hollow fiber membrane unit, a membrane support housing 20, and a dehumidification side channel 21. The hollow fiber membrane unit is fixedly installed in the air handling channel 18 and is used for water vapor permeation based on the humidity gradient on both sides of the airflow to perform pre-dehumidification of the incoming air. The membrane support housing 20 is sealed to the outdoor channel and fixes the hollow fiber membrane unit and limits the airflow path. The dehumidification side channel 21 is used to exhaust the permeated water vapor to the outside of the housing 1, and the dehumidification side channel 21 is connected to the permeation side of the hollow fiber membrane unit.

[0188] The hollow fiber membrane unit is disposed within the air handling channel 18 and is used to achieve water vapor diffusion and permeation from the high humidity side to the low humidity side according to the humidity gradient on both sides of the membrane during airflow. The permeation process of the hollow fiber membrane unit is driven by the water vapor partial pressure difference and follows the principle of gas diffusion, enabling effective dehumidification of the incoming fresh air without significantly affecting its temperature.

[0189] The membrane support housing 20 is sealed to the housing 1 or the air handling channel 18 to fix the hollow fiber membrane unit and limit the path of air through the membrane surface to maintain the dehumidification effect. The dehumidification side channel 21 is located on the permeate side of the membrane unit and is connected to the low humidity drainage chamber or the exhaust channel to collect and guide the permeated water vapor to be discharged to the outside of the housing 1.

[0190] Furthermore, the dehumidification side channel 21 may be equipped with a dehumidification fan or a diversion device to maintain a low humidity environment on the membrane permeation side, thereby stabilizing the formation of a humidity gradient to enhance water vapor permeation efficiency.

[0191] The membrane dehumidification module can pre-treat outdoor fresh air under low energy consumption conditions, reduce its moisture content, reduce the burden on the subsequent adsorption dehumidification module, and improve the dehumidification efficiency and stability of the entire system.

[0192] The hollow fiber membrane unit includes at least two hollow fiber membrane filaments 19 arranged in parallel, each filament having a gas permeable layer on its outer wall, and a membrane module end cap. Each of the at least two hollow fiber membrane filaments 19 arranged in parallel has a tubular structure with micron-sized pores. The outer wall of each filament is a gas permeable layer, which allows water vapor molecules to pass through while blocking liquid water and air. The membrane filament bundle is encapsulated in the membrane module end cap, with one end connected to an air inlet channel and the other end connected to a collection chamber for permeated gas.

[0193] Among them, at least two hollow fiber membrane filaments 19 are usually made of polymer materials with excellent moisture and temperature resistance, such as polyvinylidene fluoride (PVDF), polyetherimide (PEI) or polytetrafluoroethylene (PTFE).

[0194] The dehumidification side channel 21 is located on one side or at the bottom of the membrane support housing 20 and is used to drain water vapor that permeates from the hollow fiber membrane filaments 19. The dehumidification side channel 21 includes a gas inlet communicating with the permeate side cavity in the membrane module, a condensation chamber, and one or more gas guide pipes 15.

[0195] One or more air ducts 15 are used to guide humid air or water vapor to the outside of the housing 1; a condenser chamber is located at the end of the air handling channel 18 and is used to condense and discharge some moisture. At the same time, a solenoid valve 16 is provided on the air duct 15, and the solenoid valve 16 controls the opening and closing of the air duct 15.

[0196] The dehumidification side channel 21 is used to exhaust water vapor that has permeated to the outside of the membrane due to the humidity gradient, thereby maintaining the pressure and humidity difference on both sides of the membrane, enhancing the dehumidification performance, and preventing water vapor from accumulating in the membrane shell to form condensate and affecting the dehumidification effect.

[0197] The energy-saving heat exchange fresh air dehumidification system also includes an indoor circulation dehumidification module, which is used to dehumidify the indoor return air in indoor circulation mode to improve indoor air comfort and humidity control accuracy.

[0198] The indoor circulating dehumidification module includes a primary condensation unit, a deep adsorption unit, a drainage and condensate guiding unit, and a sealed guiding cavity. The primary condensation unit is located at the air inlet of the indoor return air channel 47 and is used to condense and precipitate some water vapor in the return air through cooling, thereby achieving primary dehumidification. The deep adsorption unit is connected in series downstream of the primary condensation unit and is used to further adsorb and remove residual moisture. The drainage and condensate guiding unit is located at the bottom of the primary condensation unit and is used to collect and discharge condensate. The sealed guiding cavity is used to limit the airflow path and ensure that the airflow flows through the primary condensation unit and the deep adsorption unit in sequence.

[0199] The indoor circulating dehumidification module also includes an intake fan 6, a return air duct 47, and a return air fan. The intake fan 6 is located in front of the primary condensation unit, so that the air entering from the air inlet 3 can quickly pass through the primary condensation unit for condensation, thereby condensing and expelling the high-humidity air in the room.

[0200] One end of the return air duct 47 is connected to the deep adsorption unit to form a return air duct. The other end of the return air duct 47 is connected to the air outlet section of the air handling duct 18. Meanwhile, the return air fan is arranged across the return air duct and blows the dehumidified air towards the air outlet section of the air handling duct 18.

[0201] The primary condensation unit includes a heat exchange coil 5, a refrigerant channel, a temperature control component 4, and fins. The refrigerant flows inside the heat exchange coil 5, and its surface provides the low-temperature surface required for condensation. The refrigerant channel transports the refrigerant, ensuring its circulation within the heat exchange coil 5 and achieving heat absorption and cooling. Located inside the heat exchange coil 5, the refrigerant flows and undergoes a phase change (evaporation or condensation) within the coil, maintaining the surface of the heat exchange coil 5 at a low temperature. The temperature control component 4 monitors and adjusts the temperature of the refrigerant or the coil surface to ensure it remains within the effective range for condensation and dehumidification (typically below the dew point temperature of the return air). The fins are located on the outer wall of the heat exchange coil 5, increasing its heat dissipation area, improving heat exchange efficiency, and providing a path for condensate to accumulate and drip.

[0202] The primary condensation unit operates as follows: Refrigerant liquid at a preset temperature is introduced into the heat exchange coil 5 through the refrigerant channel. Under the real-time control of the temperature control device, the surface temperature of the coil drops below the dew point. When indoor return air passes through the heat exchange coil 5 and its surrounding condenser fins or finned structures, water vapor in the return air condenses and precipitates on the low-temperature surface, forming condensate droplets.

[0203] The deep adsorption unit includes an adsorption carrier frame 8, an adsorption material layer 9, and a fixing support. The adsorption carrier frame 8 is used to fill the adsorption material 34. The adsorption carrier frame 8 has a rectangular or columnar structure and is made of a material with good mechanical strength and corrosion resistance (in this embodiment, the material used for the adsorption carrier frame 8 is set as: aluminum alloy frame or polymer engineering plastic). The adsorption carrier frame 8 has multiple partition channels inside, so that the adsorption material 34 can be placed. The adsorption material layer 9 is arranged in multiple channels in the carrier frame in a filling or press-fitting form. At the same time, the selected adsorption material layer 9 can be silica gel, 13X molecular sieve, activated alumina, or a composite adsorbent, and the specific selection depends on the target dehumidification accuracy and airflow parameters. The adsorption material 34 is installed in a uniformly distributed granular or honeycomb module form to ensure that the airflow can fully contact the adsorption layer under low pressure loss conditions. The fixing support is used to firmly fix the adsorption material 34 in the frame. The fixing support includes limiting mesh plates at the upper and lower ends. The limiting mesh plates prevent the adsorption material 34 from shifting or leaking due to airflow scouring.

[0204] The airflow guided by the upstream primary condensation unit enters from the air inlet of the adsorption unit and passes through multiple filling channels in the adsorption material layer 9 in sequence. During this process, the residual water vapor is captured by the adsorption material 34, thereby further reducing the absolute humidity of the air.

[0205] In addition, the adsorption carrier frame 8 is embedded in the central cavity of the indoor circulating dehumidification module and is arranged in series with the primary condensation unit to ensure the continuity of airflow direction; the fixed support is set at the upper and lower ends of the adsorption unit, which respectively play the role of support and limit; the adsorption material layer 9 is located inside the frame, and is densely arranged and evenly distributed to optimize the airflow contact area and improve adsorption efficiency.

[0206] The drainage and condensate diversion unit includes a collection tank 7, a diversion pipe 11, and an electric drainage pump 12. The collection tank 7 is used to collect the condensate dripping from the surface of the condenser fins / fins during the condensation process. At the same time, the collection tank 7 is close to the bottom of the primary condensation unit and located at the lowest point of the indoor return air channel 47.

[0207] The guide pipe 11 guides the condensate in the collection tank 7 to be discharged outward, preventing liquid backflow or stagnation; one end of the guide pipe 11 is connected to the bottom drain outlet of the collection tank 7, and the other end of the guide pipe 11 is connected to the electric drain pump 12 and collected in the drain channel (sharing a drain outlet with the drain passage).

[0208] The electric drain pump 12 forces the condensate to be discharged; wherein, the electric drain pump 12 is located in the middle or end of the guide pipe 11 and is connected to the liquid collection tank 7. The electric drain pump 12 is linked with the liquid level sensor and starts pumping to drain when the liquid level exceeds a set threshold (in this embodiment, the set threshold is set in advance by the operator or user).

[0209] The sealed airflow guiding cavity includes a sealed outer shell, a flow channel guide plate, and a connecting flange. The sealed outer shell is fixed to the inner wall of the air handling channel 18. The flow channel guide plate guides the airflow to flow through the primary condensation unit and the deep adsorption unit in a predetermined order. The connecting flange is used to reliably connect the sealed airflow guiding cavity with modules such as the return air duct and the main air handling channel to form a detachable interface.

[0210] The connecting flange is located at the air inlet and outlet 2 at both ends of the sealed flow guide cavity;

[0211] In this embodiment, when in indoor recirculation dehumidification mode, the indoor return air first enters the system main unit through the return air inlet located at the air outlet 2, and then enters the indoor return air channel 47. The airflow enters the sealed guide cavity that is sealed to it through the channel, and flows sequentially through the primary condensation unit located upstream and the deep adsorption unit located downstream inside the cavity to achieve staged dehumidification.

[0212] The primary condensation unit cools the airflow through heat exchange coil 5, causing some water vapor to condense and precipitate, thus reducing humidity. Subsequently, the airflow enters the deep adsorption unit, where residual moisture is further removed by the adsorption material 34, ultimately achieving the target dryness level. The airflow, after undergoing dual-stage dehumidification, exits from the sealed guide cavity outlet, enters the main air handling duct 18, and is then returned to the room through the shared air outlet 2, completing one dehumidification cycle.

[0213] Meanwhile, during the aforementioned indoor circulating dehumidification process, the airflow is cooled and undergoes a condensation reaction in the primary condensation unit, and the generated condensate droplets naturally drip into the collection tank 7 located below the condensation area. The collection tank 7 is located at the lowest point of the indoor return air duct 47 and is connected to the guide pipe 11.

[0214] The condensate is guided to flow through the guide pipe 11, which houses an electric drain pump 12. This pump automatically activates when the level sensor detects that the water level exceeds a set threshold, forcibly draining the condensate from the system. The drainage path ultimately leads to a centralized outdoor drainage network, ensuring a closed-loop drainage process that does not affect the system's operational stability.

[0215] By cooperating with the indoor recirculation dehumidification module and the membrane dehumidification module, the system can flexibly select the dehumidification path under different operating conditions: in fresh air mode, the membrane dehumidification module performs pre-dehumidification on the introduced high-humidity outside air; in indoor recirculation mode, the indoor recirculation dehumidification module performs multi-stage dehumidification on the indoor return air, thereby improving the overall system's dehumidification capacity and operational adaptability in multiple scenarios, ensuring that the entire system has comprehensive technical advantages such as high dehumidification efficiency, energy saving and flexibility, and wide applicability.

[0216] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of protection of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the scope of protection of the present invention. Furthermore, the elements therein can be updated as technology develops.

Claims

1. An energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation, the energy-saving heat exchange fresh air dehumidification system comprising a casing and an air handling channel disposed on the casing, characterized in that, The energy-saving heat exchange fresh air dehumidification system also includes an adsorption dehumidification module, a regeneration module, a sunlight sensing and trend prediction module, and a control module. The adsorption dehumidification module is set in the air handling channel and performs adsorption dehumidification treatment on the fresh air flowing through it. The control module includes a decision unit and a control unit. The decision unit compares the sunshine trend prediction result with the preset sunshine threshold to determine whether to trigger the regeneration module in advance. The control unit receives the decision signal from the decision unit and triggers the generation of a regeneration control signal to regulate the start-up timing and regeneration duration of the regeneration module. Regeneration duration T regen : ; In the formula, T0 is the baseline regeneration time, which can be determined experimentally; C remain C represents the remaining effective adsorption capacity of the current adsorbent material. max The maximum adsorption capacity of the adsorbent material is determined by the physical properties of the selected adsorbent material. It can be determined experimentally or by referring to the material specification and is used as a fixed parameter in system design. This is the saturation coefficient of the adsorbent material; the lower the capacity, the larger its value. I avg The average solar irradiance (W / m²) output by the trend assessment unit; I ref For reference solar radiation intensity; : A small constant to prevent the denominator from being zero; γ(I trend () is the trend correction coefficient, assigned a value based on the trend status: If the trend is in an enhancing state ; If the trend is stable. ; If the trend weakens. ; The regeneration module is connected to the adsorption and dehumidification module and performs heat exchange regeneration on the adsorbent material in the adsorption and dehumidification module. The solar radiation sensing and trend prediction module is installed on the outside of the casing and is used to obtain the solar radiation intensity of the current environment and predict the solar radiation trend within a set time period. The control module is electrically connected to the solar radiation sensing and trend prediction module and the regeneration module respectively, and determines whether to trigger the operation of the regeneration module in advance based on the solar radiation trend prediction results, so as to realize the feedforward control of the regeneration timing of the adsorbent material. The sunshine sensing and trend prediction module includes a sunshine sensing unit, a data recording unit, and a trend evaluation unit. The sunshine sensing unit collects external sunshine data in real time. The data recording unit stores current sunshine data and historical sunshine data. The trend evaluation unit predicts sunshine trend information within a set time period based on historical data, the current time period, and weather parameters. The trend evaluation unit outputs the prediction results to the control unit in the form of average sunshine intensity. The regeneration module includes a solar collector, a hot air channel, a photothermal heat exchange unit, and an air handling channel. The solar collector is fixedly installed on the outer surface of the top of the casing and is used to absorb external sunlight and convert it into heat energy. One end of the hot air channel is thermally connected to the solar collector, and the other end of the hot air channel passes through the casing and connects to the regeneration section of the air handling channel. The hot air channel is used to guide hot air to the adsorption dehumidification module. The photothermal heat exchange unit is arranged opposite to the adsorption dehumidification module. The photothermal heat exchange unit is used to receive the heat energy from the hot air channel and heat the adsorbent material by means of heat conduction or radiation to achieve local regeneration. A heat conduction path is formed between the hot air channel and the photothermal heat exchange unit, and the photothermal heat exchange unit is directly thermally coupled to the regeneration area of ​​the adsorption dehumidification module.

2. The energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation according to claim 1, characterized in that, The adsorption dehumidification module includes a housing and a carrier unit, wherein the carrier unit is disposed in the housing and is used to place adsorption material.

3. The energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation according to claim 2, characterized in that, It also includes an indoor recirculation dehumidification module, which is used to dehumidify the indoor return air in indoor recirculation mode to improve indoor air comfort and humidity control accuracy. The indoor circulating dehumidification module includes a primary condensation unit, a deep adsorption unit, a drainage and condensate guiding unit, and a sealed guiding cavity. The primary condensation unit is located at the air inlet of the indoor return air duct and condenses some of the water vapor in the return air through cooling, thus achieving primary dehumidification. The deep adsorption unit is connected in series downstream of the primary condensation unit and is used to adsorb and remove residual moisture. The drainage and condensate guiding unit is located at the bottom of the primary condensation unit and is used to collect and discharge condensate. The sealed guiding cavity is used to limit the airflow path, ensuring that the airflow passes through the primary condensation unit and the deep adsorption unit in sequence.

4. The energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation according to claim 3, characterized in that, The energy-saving heat exchange fresh air dehumidification system also includes an online status detection module. The online status detection module is used to monitor the operating status of the adsorption material in the adsorption dehumidification module in real time and evaluate its effective adsorption capacity. The online status detection module is installed near the air inlet and air outlet of the adsorption dehumidification module.

5. The energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation according to claim 4, characterized in that, The online status detection module includes a sensor unit, a data processing unit, and a data transmission interface. The sensor unit is used to detect the difference in dielectric properties or microwave signal attenuation when the airflow enters and leaves the adsorption material. The data processing unit is used to compare and analyze the detection data at the inlet and outlet to determine the real-time moisture content of the adsorption material and calculate its remaining effective adsorption capacity. The data transmission interface is used to transmit the remaining effective adsorption capacity data to the control unit.

6. The energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation according to claim 5, characterized in that, The adsorption end of the adsorption dehumidification module is connected in series with a membrane dehumidification module along the airflow direction of the outdoor channel.

7. The energy-saving heat exchange fresh air dehumidification system based on solar radiation regulation according to claim 6, characterized in that, The membrane dehumidification module includes a hollow fiber membrane unit, a membrane support housing, and a dehumidification side channel. The hollow fiber membrane unit is fixedly installed in the air handling channel and is used for water vapor permeation based on the humidity gradient on both sides of the airflow to perform pre-dehumidification of the incoming air. The membrane support housing is sealed to the air handling channel, fixes the hollow fiber membrane unit, and limits the airflow path. The dehumidification side channel is used to exhaust the permeated water vapor to the outside of the housing, and the dehumidification side channel is connected to the permeation side of the hollow fiber membrane unit.

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