A dehumidification device and method for controlling humidity of household appliances

Abstract

The application discloses a dehumidification device and method for controlling humidity and preventing damp of household appliances. The device comprises a dehumidification block, a fan system, a heater, three temperature and humidity detectors respectively arranged at both ends of the dehumidification block and in a target drying bin, and a controller. The controller controls the device to switch between adsorption dehumidification and desorption regeneration modes. In the adsorption mode, the fan guides external airflow to pass through the dehumidification block for dehumidification and then sends the dehumidified airflow into the target drying bin. In the desorption regeneration mode, the fan and the heater operate to guide heated airflow to pass through the dehumidification block in reverse and then discharge the regenerated airflow. The key point is that the controller intelligently judges dehumidification demand, saturation of the dehumidification block and completion of the regeneration state according to humidity of the target bin, humidity difference and temperature difference between both ends of the dehumidification block by using real-time data of the three detectors, so that efficient, energy-saving and accurate closed-loop control is realized, and the problem of controlling humidity and preventing damp in the household appliances is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of household appliance dehumidification technology, and more specifically, to a dehumidification device and method for controlling humidity and preventing moisture in household appliances. Background Technology

[0002] In the home appliance industry, precise control of internal humidity is increasingly important in products such as dryers, washer-dryer combos, dishwashers, garment care machines, smart wardrobes, and shoe cabinets. In many scenarios, after the drying or care cycle is complete, the humidity inside the chamber may still be too high, or even leave liquid water residue. This not only results in incomplete drying of clothes or dishes, but if not removed promptly, it can also lead to dampness, odors, and even mold, severely impacting user experience and item preservation. Simultaneously, some devices require drying airflow to protect materials, reduce wrinkles, or inhibit bacterial growth. Existing solutions often use direct airflow from the external environment to replace moisture inside the chamber, but the effectiveness of this method is greatly limited by the humidity and cleanliness of the external air. For example, during humid seasons (such as the humid spring season or high-humidity summer environments), the supplied high-humidity air cannot effectively replace the moisture inside the chamber, affecting drying efficiency; if the external air contains odors or pollutants (e.g., if the dryer is placed near a bathroom), it may also cause secondary contamination of the items inside the chamber.

[0003] While dehumidification technologies based on adsorption principles (such as those using molecular sieves and silica gel) exist, which adsorb moisture through dehumidifier blocks and regenerate it through heating, offering advantages such as relatively low energy consumption and no liquid water generation, existing dehumidifiers of this type integrated into home appliances still have significant shortcomings in control strategies and status awareness. Many solutions employ relatively simple control logic, such as relying solely on timers to switch adsorption and regeneration modes, or depending on a single humidity sensor within the target compartment. This open-loop or limited feedback control method cannot accurately and in real-time grasp the moisture absorption state (saturation) of the dehumidifier block itself, or the completion of the regeneration process. As a result, regeneration may start before the dehumidifier block is saturated, or it may continue to operate inefficiently even after saturation, leading to energy waste. Similarly, it cannot accurately determine when regeneration is completely complete, resulting in insufficient regeneration or overheating, affecting dehumidification performance and lifespan. This lack of precise awareness of the status of key components and intelligent control based on multi-point real-time feedback makes it difficult for existing adsorption dehumidification solutions to meet higher application requirements in terms of operating efficiency, control precision, and energy saving. In addition, rotary dehumidification technology requires the addition of adsorption and desorption zones and sealing, as well as a motor drive system. It has large space requirements and stringent sealing requirements, which limits the application of solid dehumidification materials in related dehumidification and humidity control appliances.

[0004] Therefore, there is an urgent need to develop an improved dehumidification device to overcome the limitations of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide an improved dehumidification device and method to overcome the limitations of the prior art.

[0006] The first aspect of the present invention provides a dehumidification device for controlling humidity and preventing moisture in household appliances, comprising: a dehumidification block having a first end and a second end; a fan system; a heater; a first temperature and humidity detector disposed near the first end of the dehumidification block; a second temperature and humidity detector disposed near the second end of the dehumidification block; a target drying chamber including a first air inlet and a second air inlet; a third temperature and humidity detector configured to detect the internal temperature and relative humidity of the target drying chamber; and a controller electrically connected to the fan system, the heater, the first temperature and humidity detector, the second temperature and humidity detector, and the third temperature and humidity detector. The controller is configured to switch the device between adsorption dehumidification mode and desorption regeneration mode. In adsorption dehumidification mode, the controller controls the fan system to guide the first airflow from the outside through the first end of the dehumidification block, the dehumidification block and the second end of the dehumidification block, and then into the target drying chamber through the first air port, and the humid air in the target drying chamber is discharged from the second air port. In desorption regeneration mode, the controller controls the fan system and the heater to guide the second airflow through the heater heating, the second end of the dehumidification block, the dehumidification block and the first end of the dehumidification block in sequence, and then discharged to the outside of the device.

[0007] Optionally, the fan system is a bidirectional fan, and the controller switches the airflow drive direction in the adsorption dehumidification mode and the desorption regeneration mode by changing the rotation direction of the bidirectional fan; in the adsorption dehumidification mode, the bidirectional fan drives the first airflow into the target drying chamber; in the desorption regeneration mode, the bidirectional fan draws the second airflow out from the first end of the dehumidification block and discharges it.

[0008] Optionally, the fan system includes: a processing fan, which operates only in adsorption dehumidification mode, for driving a first airflow into the target drying chamber; and a regeneration fan, which operates only in desorption regeneration mode, for driving a second airflow to be discharged to the outside of the device; the controller achieves mode switching by selectively activating the processing fan or the regeneration fan.

[0009] Optionally, in desorption regeneration mode, after the second airflow leaves the first end of the dehumidification block, it is discharged to the outside of the device by the regeneration fan.

[0010] Optionally, it also includes: a first set of filters disposed upstream of the first airflow entering the first end of the dehumidification block; and a second set of filters disposed at the second air inlet of the target drying chamber.

[0011] The second aspect of this invention provides a dehumidification method for controlling humidity and preventing moisture in household appliances, using the dehumidification device of any one of the first aspects of this invention, comprising the following steps: a) detecting the current relative humidity in the target drying chamber in real time or periodically using a third temperature and humidity detector; b) determining whether the current relative humidity is greater than a first preset relative humidity threshold using a controller; if so, activating the adsorption dehumidification mode of the device using the controller, driving a first airflow to pass through the dehumidification block from the outside and then into the target drying chamber, while allowing the humid air in the target drying chamber to be discharged; c) during the execution of the adsorption dehumidification mode, detecting the relative humidity at the first end and the second end of the dehumidification block using a first temperature and humidity detector and a second temperature and humidity detector, and calculating the relative humidity difference between the two; d) determining whether the relative humidity difference is less than or equal to a preset saturation threshold using the controller; if so, determining that the dehumidification block is saturated, and stopping the adsorption dehumidification mode by the controller; e) when the controller determines that the dehumidification block is saturated, activating the desorption regeneration mode of the device using the controller, driving the airflow through the heater... The hot second airflow passes through the dehumidification block in the reverse direction and is discharged to the outside of the device through the fan system; f) During the desorption regeneration mode, the controller uses the first and second temperature and humidity detectors to detect the temperature of the first and second ends of the dehumidification block and calculate the temperature difference between them; g) The controller determines whether the temperature difference is less than or equal to the preset regeneration completion threshold; if so, the dehumidification block is determined to be regenerated and the controller executes the regeneration stop procedure; h) The regeneration stop procedure includes: the controller first stops the heating of the heater, and then after a preset delay or when the controller detects that the temperature of the heater or its vicinity is lower than the safety threshold, the fan system stops operating in the desorption regeneration mode; i) During the adsorption dehumidification mode or when the device is in standby mode, the controller continuously monitors the current relative humidity. When the current relative humidity is less than or equal to the second preset relative humidity threshold, and the second preset relative humidity threshold is less than or equal to the first preset relative humidity threshold, if the device is in the adsorption dehumidification mode, the controller stops the operation of this mode.

[0012] Optionally, in step e), after the second airflow leaves the first end of the dehumidifying block, it passes through the regeneration fan and the first set of filters in sequence before being discharged.

[0013] Optionally, the conditions for determining that the dehumidifier block is saturated also include: the adsorption dehumidification mode has been running continuously for the preset maximum dehumidification time.

[0014] Optionally, the triggering conditions for executing the desorption regeneration mode also include: the cumulative adsorption and dehumidification operation time of the device has reached the preset regeneration cycle time since the last regeneration was completed.

[0015] Optionally, at least one of the first preset relative humidity threshold, the second preset relative humidity threshold, the preset saturation threshold, and the preset regeneration completion threshold can be adjusted according to environmental conditions or user input. According to the technical content disclosed in this invention, this has the following beneficial effects:

[0016] The dehumidification device for controlling humidity and preventing moisture in household appliances provided by this invention has the following significant advantages through its unique structural design and intelligent control strategy:

[0017] First, by setting up first, second, and third temperature and humidity detectors located at the first and second ends of the dehumidifier block and inside the target drying chamber, respectively, and combining them with a controller, the actual moisture absorption state (saturation) of the dehumidifier block and the real-time humidity environment of the target drying chamber can be accurately sensed. This allows the controller to intelligently trigger adsorption dehumidification or desorption regeneration modes based on real operating parameters, rather than simple timing or a single threshold, achieving on-demand operation, significantly improving dehumidification and regeneration efficiency, and effectively avoiding energy waste.

[0018] Secondly, the clearly defined adsorption dehumidification airflow path directly delivers dry air into the target drying chamber, while the desorption regeneration airflow path operates independently and discharges moisture outside the device, ensuring efficient operation of the two modes without interference and guaranteeing continuous and effective humidity control of the target drying chamber.

[0019] Furthermore, the coordinated operation of the controller, the fan system, the heater, and the three sensors constitutes a closed-loop feedback control system, which makes the device more stable and reliable in operation, and can adapt to different environmental conditions and usage requirements, overcoming the shortcomings of existing technologies that are simple to control and unable to accurately sense the state.

[0020] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0022] Figure 1 This is an airflow diagram of the adsorption dehumidification mode in Embodiment 1 of the present invention.

[0023] Figure 2 This is an airflow diagram of the desorption-regeneration mode in Embodiment 2 of the present invention.

[0024] Figure 3 This is an airflow diagram of the adsorption dehumidification mode and the desorption regeneration mode in Embodiment 2 of the present invention.

[0025] Explanation of reference numerals in the attached diagram: 1. Dehumidifier block; 2. Processing fan; 3. Regeneration fan; 4. Dust filter; 5. Deodorizing filter; 6. Regeneration heater; 7. Target drying chamber; 8. First temperature and humidity sensor; 9. Second temperature and humidity sensor; 10. Third temperature and humidity sensor; 11. Bidirectional fan. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0031] Example 1: Dehumidification module using a dual independent fan system (refer to...) Figure 1 , Figure 2 )

[0032] This embodiment details a dehumidification module, characterized by employing independent fans to drive the adsorption dehumidification airflow and the desorption regeneration airflow. Figure 1 The structure and airflow state of the module in adsorption and dehumidification mode are clearly shown. Figure 2 This demonstrates the corresponding situation when it is in the desorption-regeneration working mode.

[0033] 1. Structural composition and component layout:

[0034] Reference Figure 1 and Figure 2 The main components constituting this dehumidification module and their spatial arrangement are as follows:

[0035] Dehumidifier Block 1: As the core moisture absorption unit, this block has a first and a second physical end, is filled with solid moisture-absorbing material, and is designed with a structure through which airflow can pass smoothly, such as a corrugated porous form or a honeycomb panel filling form.

[0036] Target drying chamber 7: refers to the internal space of a household appliance (such as the drum of a clothes dryer) that requires humidity control, characterized by having a first air inlet and a second air inlet, which are the interfaces for airflow exchange between the space and the dehumidification module.

[0037] Airflow drive and regulation components:

[0038] Processing fan 2: Specifically designed to drive the first airflow (processing airflow) in adsorption dehumidification mode.

[0039] Regeneration fan 3: Specifically designed to drive a second airflow (regeneration airflow) in desorption-regeneration mode.

[0040] Regeneration heater 6: Used to heat the second airflow in desorption regeneration mode, and is usually installed before the regeneration airflow enters the second end of the dehumidification block 1.

[0041] Filtration and monitoring components:

[0042] The first set of filters includes a dust filter 4 and an odor filter 5, which are installed in the airflow channel connected to the first end of the dehumidification block 1. They are used to filter both the adsorption airflow entering the dehumidification block 1 and the regeneration exhaust gas leaving the dehumidification block 1.

[0043] The second set of filters also includes a dust filter 4 and a deodorizing filter 5, which are installed at the second air inlet of the target drying chamber 7. They are used to filter the air intake of the target drying chamber 7 in the desorption regeneration mode and the exhaust air of the target drying chamber 7 in the adsorption dehumidification mode.

[0044] First temperature and humidity detector 8: Precisely installed near the first end of the dehumidifier block 1, used to detect the temperature and relative humidity of the airflow at this location in real time.

[0045] The second temperature and humidity detector 9 is precisely installed near the second end of the dehumidifier block 1 to detect the temperature and relative humidity of the airflow in real time.

[0046] The third temperature and humidity detector 10 is directly installed inside the target drying chamber 7 to monitor the relative humidity and temperature of the actual environment that needs to be controlled in real time.

[0047] Controller (not shown in the figure): As the control center, it is usually a microcontroller (MCU). It receives real-time signals from the first temperature and humidity detector 8, the second temperature and humidity detector 9 and the third temperature and humidity detector 10 through electrical connection, and issues precise control commands (start / stop) to the processing fan 2, the regeneration fan 3 and the regeneration heater 6 according to the internal preset control logic program.

[0048] 2. Detailed Explanation of Operating Modes and Airflow Paths:

[0049] Adsorption dehumidification mode (refer to) Figure 1 ):

[0050] Activation conditions: When the controller detects through the third temperature and humidity detector 10 that the relative humidity value (denoted as RH10) in the target drying chamber 7 is greater than a preset first relative humidity threshold X (for example, X can be set to 60% RH), it indicates that dehumidification operation is required, and the controller will activate this mode.

[0051] Action executed: The controller issues a command to start the processing fan 2, while ensuring that the regeneration fan 3 and the regeneration heater 6 are in a stopped state.

[0052] The complete path of the first airflow (processing airflow): The airflow is introduced from the external environment or a specific air intake source, first purified by the first set of filters (dust filter 4 and deodorizing filter 5), then flows through the first temperature and humidity detector 8, then enters from the first end of the dehumidification block 1, and after being adsorbed by moisture in the block, flows out from its second end, passes through the second temperature and humidity detector 9, and is then sucked and pushed by the processing fan 2, and finally enters the chamber through the first air inlet of the target drying chamber 7 to achieve the drying of the air in the chamber.

[0053] Exhaust path of target drying chamber 7: In order to replace the moisture in the chamber, the airflow is drawn out from the second air port of target drying chamber 7, filtered by the second set of filters (dust filter 4 and deodorizing filter 5), and then discharged to the outside of the module or the designated discharge point.

[0054] Desorption-regeneration mode (refer to) Figure 2 ):

[0055] Start-up conditions: During adsorption dehumidification mode operation, the controller continuously monitors the relative humidity (denoted as RH8) measured by the first temperature and humidity sensor 8 and the relative humidity (denoted as RH9) measured by the second temperature and humidity sensor 9. When the relative humidity difference between the two measured by the controller (ΔRH = RH8 - RH9) is less than or equal to a preset saturation judgment relative humidity threshold Y (for example, Y can be set to 3% RH), it indicates that the dehumidification block 1 is close to adsorption saturation, the moisture absorption efficiency is significantly reduced, and regeneration is required. At this time, the controller will stop the adsorption mode and start this regeneration mode.

[0056] Action execution: The controller first issues a command to stop the processing fan 2, and then simultaneously starts the regeneration fan 3 and the regeneration heater 6.

[0057] The complete path of the second airflow (regeneration airflow): The airflow is introduced from the external environment or the second air inlet. In this embodiment, it is preferred to introduce it through the second air inlet. In the desorption regeneration mode, the regeneration fan 3 drives the generation of the second airflow, creating a negative pressure environment in the target drying chamber 7. At this time, the external air enters the target drying chamber 7 through the second air inlet after being filtered by the second set of filters, maintaining the air pressure balance inside the target drying chamber 7. The second airflow first flows through the regeneration heater 6 and is heated, then passes through the second temperature and humidity detector 9, and then enters from the second end of the dehumidification block 1. It passes through the block in reverse at a high temperature and low humidity, desorbing the previously adsorbed moisture and carrying a large amount of water vapor out from its first end. It passes through the first temperature and humidity detector 8, and is then sucked in by the regeneration fan 3 and discharged sequentially through the first set of filters (dust filter 4 and deodorization filter 5), finally reaching the outside of the module.

[0058] Of course, in some embodiments, the airflow is introduced from the external environment, and this regenerated airflow path does not involve the target drying chamber 7 and its air inlet at all.

[0059] 3. Detailed Explanation of Control Logic:

[0060] The core of this embodiment lies in how the controller, based on real-time feedback from three temperature and humidity sensors, achieves precise closed-loop control of the entire dehumidification and regeneration process. The specific steps are as follows:

[0061] Step 1: Monitor and activate the adsorption dehumidification process

[0062] The controller continuously monitors the relative humidity RH10 inside the target drying chamber 7 via the third temperature and humidity detector 10.

[0063] Judgment: If RH10 is greater than the first preset relative humidity threshold X.

[0064] Action: The controller starts the processing fan 2, entering the adsorption dehumidification mode. At the same time, ensure that the regeneration fan 3 and the regeneration heater 6 remain off.

[0065] Step 2: Adsorption process monitoring - humidity compliance judgment

[0066] During the operation of fan 2, the controller continuously monitors RH10.

[0067] Judgment: If RH10 is less than or equal to the first preset relative humidity threshold X (or a second threshold X' slightly lower than X to avoid frequent start-stop).

[0068] Action: The controller stops processing fan 2, completing the current dehumidification task, and the module enters standby mode.

[0069] Step 3: Adsorption process monitoring - saturation state determination

[0070] During the operation of fan 2, the controller continuously monitors the RH8 of the first temperature and humidity detector 8 and the RH9 of the second temperature and humidity detector 9, and calculates the relative humidity difference ΔRH = RH8 - RH9.

[0071] Judgment: If ΔRH is less than or equal to the saturation threshold Y, then the relative humidity threshold is determined.

[0072] Action: The controller determines that dehumidifier block 1 is saturated, and even if the RH10 may still be higher than X, regeneration must be prioritized. Therefore, the controller stops processing fan 2 and prepares to execute step four.

[0073] In addition, in some preferred control strategies, the controller can also be configured such that if the adsorption dehumidification mode has been running continuously for a preset maximum dehumidification time (e.g., T_max), even if ΔRH has not yet reached the relative humidity threshold Y for saturation judgment, the controller can determine that the dehumidification block 1 is saturated and prepare to execute step four, thereby avoiding long-term inefficient operation due to sensor drift or special operating conditions.

[0074] Step 4: Initiate desorption and regeneration. This step is triggered by the saturation judgment in Step 3.

[0075] Action: After ensuring that the processing fan 2 has stopped, the controller simultaneously starts the regeneration fan 3 and the regeneration heater 6, entering the desorption and regeneration mode.

[0076] In addition, in some control strategies, the controller can also be configured to: even if the saturation judgment condition of step three has not been met, when the cumulative adsorption and dehumidification operation time of the device reaches a preset regeneration cycle time (e.g., T_cycle) after the last regeneration is completed, it will also actively start the desorption and regeneration mode (i.e., perform the action of this step) to perform periodic performance recovery and maintenance.

[0077] Step 5: Regeneration Process Monitoring - Completion Status Determination

[0078] During the operation of the regenerating fan 3 and the regenerating heater 6, the controller continuously monitors the temperature of the first temperature and humidity detector 8 (denoted as T8) and the temperature of the second temperature and humidity detector 9 (denoted as T9), and calculates the temperature difference ΔT = |T8 - T9| (absolute value).

[0079] Judgment: If ΔT is less than or equal to a pre-set regeneration completion judgment temperature threshold Z (for example, Z can be set to 3℃).

[0080] Action: The controller determines that the regeneration process is basically complete. Proceed to step six.

[0081] Step Six: Execute the regeneration stop and cooling procedure. This step is triggered by the regeneration completion judgment in Step Five.

[0082] Action 1: The controller immediately stops the regeneration heater 6.

[0083] Action 2: The controller keeps the regeneration fan 3 running for a preset cooling delay time, or continuously monitors the temperature near the regeneration heater 6 until it drops to a safe value.

[0084] Action 3: After cooling is complete, the controller stops the regeneration fan 3. The module completes the regeneration cycle, returns to standby mode, and prepares to respond to the next dehumidification demand.

[0085] Throughout the entire control logic, the controller always ensures that the processing fan 2 and the regeneration fan 3 do not operate simultaneously, thus achieving interlocking.

[0086] Example 2: Dehumidification module using a single / double-direction fan system (refer to...) Figure 3 )

[0087] This embodiment demonstrates another dehumidification module design, which uses a bidirectional fan 11 to replace the two independent fans in Embodiment 1. By changing the rotation direction of the fan, airflow can be driven in both adsorption and regeneration modes. Figure 3 A schematic diagram of this structure is shown.

[0088] 1. Structural composition and component layout:

[0089] Reference Figure 3 The main components constituting this dehumidification module and their spatial arrangement are as follows:

[0090] Dehumidifier block 1: It also has a first end and a second end in terms of physical structure.

[0091] Target drying chamber 7: also has a first air inlet and a second air inlet.

[0092] Airflow drive and regulation components:

[0093] Bidirectional fan 11: The core drive component, capable of rotating in either the forward or reverse direction according to controller commands.

[0094] Regeneration heater 6: Used to heat the regeneration gas flow in desorption-regeneration mode.

[0095] Filtration and monitoring components:

[0096] The first set of filters includes a dust filter 4 and a deodorizing filter 5, and is installed in the airflow channel connected to the first end of the dehumidifying block 1.

[0097] The second set of filters also includes a dust filter 4 and a deodorizing filter 5, and is installed on the second air inlet of the target drying chamber 7.

[0098] First temperature and humidity detector 8: installed near the first end of dehumidifier block 1.

[0099] The second temperature and humidity detector 9 is installed near the second end of the dehumidifier block 1.

[0100] The third temperature and humidity detector 10 is installed inside the target drying chamber 7.

[0101] Controller (not shown): Connects to bidirectional fan 11, regenerative heater 6, first temperature and humidity detector 8, second temperature and humidity detector 9 and third temperature and humidity detector 10, and executes control logic.

[0102] 2. Detailed Explanation of Operating Modes and Airflow Paths:

[0103] Adsorption dehumidification mode (refer to) Figure 3 (Bidirectional fan 11 rotating forward):

[0104] Start-up condition: The controller starts when the relative humidity value (denoted as RH10) inside the target drying chamber 7 is detected by the third temperature and humidity detector 10 as being greater than the first preset relative humidity threshold X.

[0105] Action executed: The controller issues a command to control the bidirectional fan 11 to rotate in the forward direction, while ensuring that the regenerative heater 6 is in a stopped state.

[0106] The complete path of the first airflow (processing airflow): outside air → first set of filters (including dust filter 4 and deodorizing filter 5) → first temperature and humidity detector 8 → dehumidification block 1 (first end inlet, second end outlet) → second temperature and humidity detector 9 → bidirectional fan 11 (forward rotation push) → first air outlet of target drying chamber 7.

[0107] Exhaust path of target drying chamber 7: second air inlet of target drying chamber 7 → second set of filters (including dust filter 4 and deodorizing filter 5) → exhaust.

[0108] Desorption-regeneration mode (refer to) Figure 3 (Bidirectional fan 11 reverses):

[0109] Start-up conditions: During the operation of the adsorption dehumidification mode, the controller starts when the relative humidity difference (ΔRH=RH8-RH9) calculated by the controller based on RH8 measured by the first temperature and humidity detector 8 and RH9 measured by the second temperature and humidity detector 9 is less than or equal to the saturation judgment relative humidity threshold Y.

[0110] Action execution: The controller first issues a command to stop the forward rotation of the bidirectional fan 11, then controls the bidirectional fan 11 to rotate in the reverse direction, and simultaneously starts the regenerative heater 6.

[0111] The complete path of the second airflow (regenerated airflow): outside air → second set of filters → second air inlet of target drying chamber 7 → target drying chamber 7 → first air inlet of target drying chamber 7 → bidirectional fan 11 (reverse suction) → regeneration heater 6 → second temperature and humidity detector 9 → dehumidification block 1 (second end inlet, first end outlet) → first temperature and humidity detector 8 → first set of filters (including dust filter 4 and deodorization filter 5) → discharge.

[0112] 3. Detailed Explanation of Control Logic:

[0113] The control logic of this embodiment is consistent with the core idea of ​​embodiment one, both based on the feedback of three temperature and humidity sensors and preset thresholds. However, the key at the execution level is the control of the rotation direction and start / stop of the bidirectional fan 11.

[0114] Step 1: Monitor and activate the adsorption dehumidification process

[0115] Monitor the RH10 of the third temperature and humidity detector 10.

[0116] Judgment: If RH10 > the first preset relative humidity threshold X.

[0117] Action: The controller commands the bidirectional fan 11 to rotate in the forward direction and ensures that the regenerative heater 6 is turned off.

[0118] Step 2: Adsorption process monitoring - humidity compliance judgment;

[0119] Monitor RH10.

[0120] Judgment: If RH10 ≤ the first preset relative humidity threshold X (or X').

[0121] Action: The controller commands the bidirectional fan 11 to stop rotating.

[0122] Step 3: Adsorption process monitoring - saturation state determination

[0123] Monitor the RH8 of the first temperature and humidity detector 8 and the RH9 of the second temperature and humidity detector 9, and calculate ΔRH = RH8 - RH9.

[0124] Judgment: If ΔRH ≤ saturation, determine the relative humidity threshold Y.

[0125] Action: The controller commands the bidirectional fan 11 to stop rotating in the forward direction and prepares to execute step four.

[0126] In addition, in some preferred control strategies, the controller can also be configured such that if the adsorption dehumidification mode has been running continuously for a preset maximum dehumidification time (e.g., T_max), even if ΔRH has not yet reached the relative humidity threshold Y for saturation judgment, the controller can determine that the dehumidification block 1 is saturated and prepare to execute step four, thereby avoiding long-term inefficient operation due to sensor drift or special operating conditions.

[0127] Step 4: Initiate desorption and regeneration, triggered by step 3.

[0128] Action: After ensuring that the fan has stopped rotating forward, the controller commands the bidirectional fan 11 to rotate in reverse and simultaneously starts the regenerative heater 6.

[0129] In addition, in some control strategies, the controller can also be configured to: even if the saturation judgment condition of step three has not been met, when the cumulative adsorption and dehumidification operation time of the device reaches a preset regeneration cycle time (e.g., T_cycle) after the last regeneration is completed, it will also actively start the desorption and regeneration mode (i.e., perform the action of this step) to perform periodic performance recovery and maintenance.

[0130] Step 5: Regeneration process monitoring - completion status assessment;

[0131] Monitor the temperature and humidity of the first temperature and humidity detector 8 (T8) and the temperature and humidity of the second temperature and humidity detector 9 (T9), and calculate ΔT = |T8 - T9|.

[0132] Judgment: If ΔT ≤ the regeneration completion judgment temperature threshold Z.

[0133] Action: The controller determines that regeneration is complete and proceeds to step six.

[0134] Step Six: Execute the regeneration stop and cooling procedure, which is triggered by Step Five.

[0135] Action 1: The controller first stops the regeneration heater 6.

[0136] Action 2: The controller keeps the bidirectional fan 11 rotating in the opposite direction for a preset cooling time or until the heater is fully cooled.

[0137] Action 3: The controller stops the reverse rotation of the bidirectional fan 11. The module completes regeneration and enters standby mode.

[0138] In summary, regardless of whether the dual independent fan structure of Embodiment 1 or the single / double bidirectional fan structure of Embodiment 2 is adopted, the dehumidification module disclosed in this invention can achieve significant technical effects:

[0139] Efficient and intelligent humidity control: By accurately monitoring the actual humidity of the target drying chamber 7 (detected by the third temperature and humidity detector 10) and the working status of the dehumidification block 1 (based on the data of the first temperature and humidity detector 8 and the second temperature and humidity detector 9), combined with preset control thresholds (first preset relative humidity threshold X, saturation judgment relative humidity threshold Y, regeneration completion judgment temperature threshold Z), closed-loop intelligent control of on-demand dehumidification and state-based regeneration is realized, ensuring efficient humidity regulation performance while maximizing energy savings.

[0140] Excellent air cleanliness: By setting the first set of filters (including dust filter 4 and deodorizing filter 5) and the second set of filters (including dust filter 4 and deodorizing filter 5) at key airflow nodes, particulate matter and odors in the air entering and leaving the system can be effectively filtered. This not only protects the core dehumidifying block 1 from contamination and extends its service life, but also provides a clean and odorless dry air environment for the target drying chamber 7.

[0141] Reliable Structure and Flexible Design: Both embodiments offer a clear and reliable structural design. Embodiment 1 uses a processing fan 2 and a regeneration fan 3, with clearly defined roles; Embodiment 2 uses a unidirectional and bidirectional fan 11, resulting in a more compact structure. The control logic is rigorous, including necessary post-regeneration cooling steps (such as stopping the regeneration heater 6 first), which helps improve the long-term operational reliability of the system. These two schemes provide design flexibility for practical applications.

[0142] In summary, this invention, through meticulous structural design, clear airflow organization, and a precise intelligent control strategy based on multi-sensor feedback, successfully provides an advanced technical solution that integrates high efficiency, energy saving, cleanliness, and reliability for solving the problem of moisture control and damp prevention inside home appliances (such as dryers, dishwashers, and garment care machines).

[0143] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but this does not constitute any limitation on the present invention. Any person skilled in the art can make various reasonable modifications, equivalent substitutions, or adaptive improvements without departing from the design concept and scope of protection embodied in the present invention. For example, optimizing the specific values ​​of the first preset relative humidity threshold X, the saturation judgment relative humidity threshold Y, and the regeneration completion judgment temperature threshold Z; selecting different types or combinations of dust filters and deodorizing filters; employing more advanced control algorithms (such as PID control and fuzzy logic control) to further optimize control accuracy and response speed; and fine-tuning the specific model selection and installation location of the sensors. All these variations based on the basic technical concept of the present invention should be understood as being included within the scope of protection claimed by the present invention.

Claims

1. A dehumidifier for controlling humidity and preventing moisture in household appliances, characterized in that, include: The dehumidifier block (1) has a first end and a second end; Fan system; Heater (6); The first temperature and humidity detector (8) is located near the first end of the dehumidification block (1); The second temperature and humidity detector (9) is located near the second end of the dehumidification block (1); The target drying chamber (7) includes a first air inlet and a second air inlet; The third temperature and humidity detector (10) is configured to detect the internal temperature and relative humidity of the target drying chamber (7); as well as The controller is electrically connected to the fan system, the heater (6), the first temperature and humidity detector (8), the second temperature and humidity detector (9), and the third temperature and humidity detector (10); The controller is configured to control the device to switch between adsorption dehumidification mode and desorption regeneration mode. In the adsorption dehumidification mode, the controller controls the operation of the fan system to guide the first airflow from the outside through the first end of the dehumidification block (1), the dehumidification block (1) and the second end of the dehumidification block (1), and then sends it into the target drying chamber (7) through the first air port, and causes the humid air in the target drying chamber (7) to be discharged from the second air port; In the desorption and regeneration mode, the controller controls the operation of the fan system and the heater (6) to guide the second airflow through the heater (6) for heating, the second end of the dehumidifying block (1), the dehumidifying block (1) and the first end of the dehumidifying block (1) in sequence, and then discharges to the outside of the device.

2. The dehumidification device according to claim 1, characterized in that, The fan system is a bidirectional fan (11). The controller switches the airflow drive direction in the adsorption dehumidification mode and the desorption regeneration mode by changing the rotation direction of the bidirectional fan (11). In the adsorption dehumidification mode, the bidirectional fan (11) drives the first airflow into the target drying chamber (7). In the desorption regeneration mode, the bidirectional fan (11) draws the second airflow out from the first end of the dehumidification block (1) and discharges it.

3. The dehumidification device according to claim 1, characterized in that, The fan system includes: The processing fan (2), operating only in the adsorption dehumidification mode, is used to drive the first airflow into the target drying chamber (7); and The regeneration fan (3) operates only in the desorption and regeneration mode and is used to drive the second airflow to be discharged to the outside of the device; The controller achieves mode switching by selectively activating the processing fan (2) or the regeneration fan (3).

4. The dehumidification device according to claim 3, characterized in that, In the desorption and regeneration mode, after the second airflow leaves the first end of the dehumidification block (1), it is discharged to the outside of the device by the regeneration fan (3).

5. The dehumidification device according to claim 1, characterized in that, Also includes: The first set of filters is located upstream of the first airflow entering the first end of the dehumidification block (1); as well as The second set of filters is installed on the second air inlet of the target drying chamber (7).

6. A dehumidification method for controlling humidity and preventing moisture in household appliances, characterized in that, Using the dehumidifier according to any one of claims 1 to 5 includes the following steps: a) The current relative humidity inside the target drying chamber (7) is detected in real time or periodically by the third temperature and humidity detector (10); b) The controller determines whether the current relative humidity is greater than the first preset relative humidity threshold; if so, the controller activates the adsorption dehumidification mode of the device, drives the first airflow to pass through the dehumidification block (1) from the outside and send it into the target drying chamber (7) after dehumidification, and allows the humid air in the target drying chamber (7) to be discharged at the same time. c) During the adsorption dehumidification mode, the relative humidity of the first end and the second end of the dehumidification block (1) is detected by the controller using the first temperature and humidity detector (8) and the second temperature and humidity detector (9), and the relative humidity difference between the two is calculated. d) The controller determines whether the relative humidity difference is less than or equal to a preset saturation threshold; if so, the dehumidification block (1) is determined to be saturated, and the controller stops the adsorption dehumidification mode. e) When the controller determines that the dehumidification block (1) is saturated, the desorption regeneration mode of the device is activated by the controller, and the second airflow heated by the heater (6) is driven to pass through the dehumidification block (1) in the opposite direction and discharged to the outside of the device through the fan system; f) During the execution of the desorption regeneration mode, the controller uses the first temperature and humidity detector (8) and the second temperature and humidity detector (9) to detect the temperature at the first end and the second end of the dehumidification block (1) and calculate the temperature difference between them; g) The controller determines whether the temperature difference is less than or equal to the preset regeneration completion threshold; if so, the dehumidifier block (1) is determined to be regenerated and the controller executes the regeneration stop procedure. h) The regeneration stop procedure includes: the controller first stops the heating of the heater (6), and then after a preset delay or when the controller detects that the temperature of the heater (6) or its vicinity is lower than a safety threshold, the operation of the fan system in the desorption regeneration mode is stopped; i) During the adsorption dehumidification mode or when the device is in standby mode, the controller continuously monitors the current relative humidity. When the current relative humidity is less than or equal to the second preset relative humidity threshold, and the second preset relative humidity threshold is less than or equal to the first preset relative humidity threshold, if the device is in the adsorption dehumidification mode, the controller stops the operation of this mode.

7. The dehumidification method according to claim 6, characterized in that, When using a dehumidifier incorporating the features of claims 3 and 5, in step e), after the second airflow leaves the first end of the dehumidifier block (1), it passes sequentially through the regeneration fan (3) and the first set of filters and is discharged.

8. The dehumidification method according to claim 6, characterized in that, The conditions for determining that the dehumidifying block (1) is saturated also include: the adsorption dehumidification mode has been running continuously for the preset maximum dehumidification time.

9. The dehumidification method according to claim 6, characterized in that, The triggering conditions for executing the desorption and regeneration mode also include: the cumulative adsorption and dehumidification operation time of the device reaches the preset regeneration cycle time since the last regeneration was completed.

10. The dehumidification method according to claim 6, characterized in that, At least one of the first preset relative humidity threshold, the second preset relative humidity threshold, the preset saturation threshold, and the preset regeneration completion threshold can be adjusted according to environmental conditions or user input.

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