A control method for steady balance and sampling accuracy of a dehumidifier

Abstract

This invention discloses a control method for steady-state balance and accurate sampling of a dehumidifier. The method includes determining whether to forcibly reduce the dehumidifier's operating power based on changes in ambient relative humidity collected within a preset sampling period when the dehumidifier is in dehumidification operation. This invention effectively solves the problems pointed out in the background art, including improving the service life of the dehumidifier, preventing frost or ice buildup on the cold end of the semiconductor cooler inside the dehumidifier, ensuring timely drainage of condensate, guaranteeing dehumidification effect, accurately collecting ambient temperature and relative humidity, and reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of dehumidifier control technology, specifically a control method for dehumidifier steady-state balance and accurate sampling. Background Technology

[0002] Dehumidifiers based on semiconductor coolers are finding increasingly widespread applications, such as dehumidifying the storage spaces of energy storage batteries to maintain the relative humidity within a target range. However, dehumidifiers based on semiconductor coolers present one or more of the following problems in practical use: 1. The electrical conductivity of the thermoelectric material in a thermoelectric cooler is affected by the ambient temperature and relative humidity of the physical space where the dehumidifier is located. The internal resistance of the thermoelectric cooler will change with fluctuations in ambient temperature and humidity. Taking the commonly used bismuth telluride (BeTi) thermoelectric material as an example, the internal resistance of a thermoelectric cooler made of bismuth telluride thermoelectric material is positively correlated with the ambient temperature. As the ambient temperature decreases, the internal resistance of the thermoelectric cooler also decreases, and vice versa. Assuming a thermoelectric cooler using 127 pairs of 1.4*1.4*1.7 standard BeTi thermoelectric material grains integrated on the substrate, and the dehumidifier containing this thermoelectric cooler is located in an ambient temperature of -35 ℃ when it starts up (in energy storage scenarios, the lower limit of the storage environment temperature where the energy storage battery is located is generally -35 ℃ to -40 ℃), at this ambient temperature of -35 ℃, the internal resistance of the thermoelectric cooler is 1.5 Ω (ohms). The typical ambient temperature for dehumidifiers is 25°C. At this temperature, the internal resistance of the thermoelectric cooler is 2.1 Ω. This means that, under constant voltage operation, the operating power of the thermoelectric cooler at -35°C (i.e., the input power supplied by the power supply) needs to be approximately 29% higher than that at 25°C. To ensure the thermoelectric cooler can maintain dehumidification across a wide temperature range from -35°C to 25°C, the power supply for the thermoelectric cooler needs to be designed with a power margin. This means the power supply's input power must be greater than the maximum operating power of the thermoelectric cooler (which is highest at -35°C within the wide temperature range). Therefore, compared to the operating power at 25°C, the power supply needs to be increased by approximately 39% to meet this margin requirement. Due to these characteristics, if a thermoelectric cooler operates at a constant voltage (i.e., constant voltage), both its operating current and power will increase as the temperature decreases. Therefore, designing the power supply for the thermoelectric cooler or controlling the input power (e.g., direct connection to AC mains) is crucial. While an excessively large power supply may meet the power requirements of the thermoelectric cooler under the most severe operating conditions (lowest ambient temperatures, such as -35°C to -40°C), it will also result in wasted power margin.

[0003] Therefore, from a power supply perspective, the power supply used to power the thermoelectric cooler needs to be rationally designed. While meeting the input power required for the normal operation of the thermoelectric cooler, it is also necessary to avoid wasting power margin. From the perspective of the thermoelectric cooler or dehumidifier itself, the operating power of the thermoelectric cooler during startup needs to differ from its operating power under normal operating conditions at rated voltage, in order to adapt to dehumidification over a wide temperature range.

[0004] 2. Dehumidifiers based on semiconductor coolers achieve their dehumidification effect by relying on the relationship between the cold end surface temperature and the dew point temperature of the semiconductor cooler. If the cold end surface temperature is lower than the dew point temperature, the cold end surface can condense water-containing air into liquid water, achieving dehumidification; conversely, if the cold end surface temperature is higher than the dew point temperature, water cannot be condensed, and dehumidification cannot be achieved. The dew point temperature is related to the ambient temperature and humidity; different ambient temperatures and humidity levels correspond to different dew point temperatures. Under a given ambient temperature and humidity, the dew point temperature is also fixed.

[0005] Furthermore, the ambient temperature is higher than the dew point temperature, and there is a positive temperature difference between them. For example, at an ambient relative humidity of 85% (RH), the ambient temperature is about 2-3 °C higher than the dew point temperature. Similarly, at ambient relative humidity levels of 80%, 70%, 60%, and 50%, the temperature differences between the ambient temperature and the dew point temperature are approximately 3-4 °C, 5-6 °C, 7-9 °C, and 10-12 °C, respectively. Because of this relationship between the cold end surface temperature, dew point temperature, and ambient temperature, it means that at certain ambient temperatures and relative humidity levels, the cold end surface temperature needs to be below zero to maintain the dehumidification effect of the thermoelectric cooler. However, if the cold end surface temperature is below zero, frost and / or ice will form on the cold end surface, preventing condensate from draining and thus hindering dehumidification.

[0006] Therefore, it is necessary to control the thermoelectric cooler to initiate defrosting and defrosting operations in a timely manner under appropriate conditions, avoiding starting the defrosting and defrosting process before or after frost and ice formation. Starting after this point means that frost and ice have already formed on the cold end surface of the thermoelectric cooler. At this time, the temperature of the cold end surface will not reach the required defrosting temperature, making effective defrosting and defrosting impossible. The frost or ice on the cold end surface cannot melt into water and drain away, thus failing to achieve a dehumidification effect. Starting too early, the thermoelectric cooler will shut down or operate at low power, affecting the dehumidification capacity. In other words, although dehumidification is still possible, the dehumidification rate is lower, resulting in a poorer dehumidification effect.

[0007] 3. Dehumidifiers operate within a humidity range, defined as upper and lower limits. If the current relative humidity exceeds the upper limit, it means the humidity exceeds the permissible range, requiring dehumidification, and thus the dehumidifier needs to be activated. After the dehumidifier operates for a period, the relative humidity of the physical space where it is located will decrease. When the relative humidity drops below the lower limit, the dehumidifier should be stopped to prevent further decreases below the lower limit, i.e., to avoid the relative humidity falling below the user-defined lower limit. Therefore, the dehumidifier must be shut down. Ultimately, through dehumidification, the relative humidity is maintained between the upper and lower limits.

[0008] Under this operating mechanism, and considering that dehumidifiers with semiconductor coolers have lower cooling capacity compared to those without, and are more affected by ambient temperature and relative humidity, a humidity equilibrium state occurs during dehumidification. This means the amount of moisture removed by the dehumidifier is equal to the amount of moisture added to the environment. The dehumidifier continues to operate but cannot further reduce the relative humidity, preventing it from shutting down. This not only increases energy consumption but also affects the dehumidifier's lifespan and reliability due to continuous high-power operation, ultimately leading to performance degradation and reduced dehumidification capacity.

[0009] 4. Dehumidifiers need to drain condensate while simultaneously requiring a fan to create airflow for ventilation and heat dissipation. Under certain structural limitations, the airflow from the fan and the direction of condensate drainage are opposite, creating negative pressure and hindering timely condensate removal. Besides structural modifications to address this issue, timely drainage can be controlled to reduce the negative impact of secondary condensate evaporation caused by delayed drainage, thus minimizing the dehumidifier's dehumidification capacity.

[0010] 5. As described in point 3 above, when the ambient temperature reaches the lower humidity limit, the dehumidifier will be forcibly shut down, and the semiconductor cooler and fan inside the dehumidifier will stop working. The sensors that collect ambient temperature and relative humidity are usually installed on the airflow duct of the fan. Therefore, when the fan stops working, no airflow can be formed, causing the collected ambient temperature and relative humidity to be inaccurate, i.e., there is a large error.

[0011] Therefore, it is necessary to ensure that the actual ambient temperature and relative humidity can be accurately collected, while also effectively reducing or even not affecting the dehumidifier's original mechanism of stopping the machine as needed. Summary of the Invention

[0012] In view of the shortcomings of the prior art, the purpose of this invention is to provide a control method for the steady-state balance and accurate sampling of a dehumidifier, which can solve the problems pointed out in points 3 and 5 of the background art description.

[0013] The technical solution for achieving the objective of this invention is: a method for controlling the steady-state balance of a dehumidifier, comprising, When the dehumidifier is in dehumidification mode, the operating power of the dehumidifier can be forcibly reduced based on the changes in the relative humidity of the environment collected within a preset collection period.

[0014] Furthermore, based on the changes in ambient relative humidity collected within a preset collection period, it is determined whether to forcibly reduce the dehumidifier's operating power. The specific implementation process includes the following steps: The dehumidifier enters a steady-state forced shutdown mode. In this mode, if the collected ambient relative humidity meets steady-state conditions within a preset data collection period, the dehumidifier's operating power is forcibly reduced. Steady-state condition: Change in ambient relative humidity ≤ preset relative humidity change threshold.

[0015] Furthermore, if the collected ambient relative humidity meets the steady-state conditions within the preset collection period, the dehumidifier's operating power is forcibly reduced. The specific implementation process includes the following steps: Step 31: Collect and obtain the current ambient relative humidity; Step 32: After the dehumidifier enters the steady-state forced shutdown mode, collect at least two ambient relative humidity data at different times within the preset collection period. Determine the change in ambient relative humidity based on the collected ambient relative humidity data. If the change in ambient relative humidity meets the steady-state condition, then forcibly reduce the working power of the dehumidifier.

[0016] Furthermore, the determination of environmental relative humidity changes based on the environmental relative humidity collected in each instance, if the environmental relative humidity changes satisfy the steady-state condition, is achieved by any one of the following execution schemes 1-5: Implementation Plan 1: Among all collected ambient relative humidity data, the difference between the maximum and minimum ambient relative humidity is taken as the change in ambient relative humidity. If the change in ambient relative humidity is less than or equal to a preset relative humidity change threshold, it is considered to meet the steady-state condition. Implementation Plan 2: Among all the environmental relative humidity data collected within the preset collection period, select several groups of environmental relative humidity in the collection order. Each group includes two adjacent environmental relative humidity values. The difference between adjacent environmental relative humidity values ​​within the same selected group is taken as the environmental relative humidity change for each group. If at least one group has an environmental relative humidity change ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. Implementation Scheme 3: Among all the environmental relative humidity samples collected within the preset collection period, select several groups of environmental relative humidity in the collection order. Each group includes three or more adjacent environmental relative humidity values. In the selected environmental relative humidity groups, the difference between the maximum and minimum environmental relative humidity is taken as the environmental relative humidity change. If at least one group has an environmental relative humidity change ≤ a preset relative humidity change threshold, it is considered to meet the steady-state condition. Alternatively, from all environmental relative humidity data collected within a preset collection period, select several sets of environmental relative humidity data. Each set includes two non-adjacent environmental relative humidity values. Within the selected environmental relative humidity sets, the difference between the two environmental relative humidity values ​​is taken as the corresponding environmental relative humidity change. If at least one set of environmental relative humidity changes is ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. Implementation Plan 4: Within the preset collection period, for all collected ambient relative humidity values, calculate the difference between any two ambient relative humidity values. This difference is taken as the change in ambient relative humidity. Compare this change in ambient relative humidity with a preset threshold for change in ambient relative humidity. Count the number of comparison results. If the number of comparison results where the change in ambient relative humidity is less than or equal to the preset threshold for change in ambient relative humidity is greater than or equal to a preset threshold, then the steady-state condition is considered satisfied. Implementation Plan 5: Within the preset collection period, calculate the rate of change of any two ambient relative humidities. If at least two ambient relative humidities have a rate of change ΔRH ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. According to the collection order, the i-th ambient relative humidity (RH) i and the j-th ambient relative humidity RH j The formula for calculating the rate of change ΔRH is as follows, where i < j: △RH=|RH j -RH i | / RH i In the formula, || represents taking the absolute value.

[0017] Furthermore, in execution schemes 1-5, outliers in the collected ambient relative humidity are first removed, and then, in the remaining ambient relative humidity, the corresponding execution schemes 1-5 are executed.

[0018] Furthermore, the control may forcibly reduce the operating power of the dehumidifier, including shutting down the dehumidifier's thermoelectric cooler and / or fan, or allowing the thermoelectric cooler and / or fan to operate at a preset power, where the preset power is less than the rated power.

[0019] Furthermore, after receiving a command to forcibly reduce the dehumidifier's operating power, the power supply to the fan is cut off after a certain period of time, thereby turning off the fan.

[0020] Furthermore, the preset collection time is 0.5-2 hours, and the preset relative humidity change threshold is 1%-2%.

[0021] Furthermore, after forcibly reducing the dehumidifier's operating power, it also includes implementing Option 1 or Option 2: Option 1: In response to the dehumidifier shutdown command, the semiconductor cooler is turned off, and the fans alternate between running and turning off in the same cycle. Within the same cycle, the duration of the fan running is less than the duration of the fan being off. Adjacent fan runs and turns off are considered to be the same cycle according to the running sequence. Option 2: In response to the dehumidifier shutdown command, the semiconductor cooler is turned off, and the fan operates at the preset power.

[0022] Furthermore, the specific implementation process of ensuring that the fan runs for a shorter period than it is off within the same cycle includes the following steps: After each first preset runtime T1, the fan stops running for a second preset runtime T2, and the following conditions are met: Or, T2-T1≥ , For the preset threshold, , For the preset threshold, .

[0023] Furthermore, T1 = 3 min, T2 = 30 min.

[0024] Furthermore, in Scheme 2, the preset operating power satisfies: This operating power enables the fan to generate airflow, and the airflow intensity is sufficient to move the air through the airflow channel where the ambient temperature sensor and the ambient relative humidity sensor are located. The ambient temperature sensor and the ambient relative humidity sensor are located inside the dehumidifier.

[0025] Furthermore, the preset operating power is lower than the operating power of the fan when the dehumidifier is in dehumidification mode.

[0026] The beneficial effects of the present invention are as follows: The present invention can effectively solve the problems pointed out in the background art, including improving the service life of dehumidifiers, preventing frost or ice formation on the cold end of the semiconductor refrigeration unit inside the dehumidifier, ensuring timely discharge of condensate, ensuring dehumidification effect, accurately collecting ambient temperature and relative humidity, and reducing energy consumption. Attached Figure Description

[0027] Figure 1 This is a flowchart illustrating a preferred embodiment of the present invention; Figure 2 This is a schematic diagram comparing the input power of the dehumidifier of this invention and the traditional dehumidifier. Figure 3 This is one example of a diagram illustrating the change in power of a dehumidifier from its initial power to its rated power. Figure 4This is an example of a diagram illustrating the change in power of another dehumidifier from its initial power to its rated power. Figure 5 This is an example of a diagram illustrating the change in power of a dehumidifier from its initial power to its rated power. Figure 6 This is an example of a diagram illustrating the change in power of a dehumidifier from its initial power to its rated power. Figure 7 Here is an exemplary flowchart illustrating step 2 in this embodiment; Figure 8 To illustrate another exemplary process diagram for step 2 in this embodiment; Figure 9 A schematic diagram of a dehumidifier including a semiconductor cooler and a fan; In the diagram, 1-fan, 2-cold end, 3-semiconductor cooler, 4-hot end, 5-water collection box, 6-water outlet, 7-air inlet. Detailed Implementation

[0028] To address the problems described in the background section, the present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-9 As shown, the present invention provides a defrosting and de-icing method for a dehumidifier, which is based on a control method for a dehumidifier including a semiconductor cooler 3 and a fan 1. The control method includes the following steps: Step 1: In response to the dehumidifier start command, the semiconductor cooler starts at the preset initial power and increases to the target power to enter the dehumidification working state.

[0029] Specifically, when in response to a dehumidifier start command, the semiconductor cooler 3 inside the dehumidifier starts up according to the first preset input power and maintains it for a preset duration. After starting operation, the semiconductor cooler 3 operates at the second preset input power, where the first preset input power is less than the second preset input power. The second preset input power represents the operating power of the semiconductor cooler 3 when operating at its rated voltage, which is also its rated power. The first preset input power is the initial power, and the second preset input power is the target power. This allows the dehumidifier to start at a low power and then operate at its rated power to perform dehumidification, achieving a power-protective slow start.

[0030] refer to Figure 2 , Figure 2 Normal startup refers to the startup mode of the semiconductor cooler 3 in existing dehumidifiers, where the input power is at its maximum during startup, and then remains constant after entering a stable state. Soft startup refers to the startup mode of this invention, which starts with a first preset input power and continues for a specified duration. Then, the input power is increased to the second preset input power, and eventually it enters a stable state where the input power remains unchanged.

[0031] The aforementioned semiconductor cooler 3 starts up in a stepped manner to enter the dehumidification working state, with the input power jumping from a lower value to a higher value. Of course, a second method can also be used to start up and enter the dehumidification working state in the same way.

[0032] refer to Figure 3 The second option is to start the semiconductor cooler 3 in the dehumidifier at the preset initial power. After starting, the power is gradually increased by a preset amount based on the initial power until it reaches the rated power. The semiconductor cooler 3 then enters the dehumidification working state at the rated power.

[0033] It should be noted that "immediately" here means that after the dehumidifier starts at the preset initial power, it does not extend the time or insert other processing tasks. Instead, the next processing task immediately after starting is to gradually increase the power.

[0034] In the second scheme, the power increase can be linear or non-linear. The linear increase includes several schemes. Scheme 1: The power increase is always... Preset increase amount It can be set according to the actual situation, such as increasing the amount. The setting is 1 W (watts), meaning the power at the current moment is the power at the previous moment increased by 1 W (watts). For example, the increase... The increase rate can be set to 5%, meaning the power at the current moment is the power at the previous moment plus an additional 5% of the power at the previous moment. This is achieved through a preset increase. The power is gradually increased so that the semiconductor cooler 3 starts at a low power at startup, and then gradually increases over time, linearly until it reaches the rated power, thus achieving a slow-increase startup method.

[0035] In Scheme 1, although the increase in power from the initial power to the rated power is linear, the increase is the same at any two adjacent moments, meaning it increases at the same rate of change throughout the entire process. This is represented as a straight line in the p(power)-t(time) graph. In actual use, the time from the initial power to the rated power can include multiple different rates of change, thus leading to Scheme 2.

[0036] refer to Figure 4Taking the linear spindle power increase achieved by including three different increments as an example, Scheme 2: During the process of increasing the initial power to the rated power, at least three different increments occur. These three different increments are: 1. 2. 3, and 1> 3> 2. For example, after initial power startup, the increase is... The power is increased by 1 to the next power P1, and the power P1 then increases by the amount of 1. 2. Increase to the next power level; the power at each subsequent time step will be based on the power at the previous time step by an increase of [amount missing]. 3. Incremental approach. Similarly, in the third scheme, power can be increased by more or fewer (two) different increments, but overall, the power is increased gradually until the rated power is reached. That is, in the third scheme, the power can be increased rapidly at first, then slower, and finally faster again. Or, the power can be increased in a way that starts slowly and gradually increases faster.

[0037] In Scheme 2, the execution order of the various increments with different values ​​is arbitrary; for example, it could be in the order of... 1. 2. Proceed in the order of 3, or in the following order: 2. 1. It can be done in the order of 3, or it can be done in the following order. 3. 2. 1. Perform the operation, but each preset increment must be executed at least once.

[0038] Both Scheme 1 and Scheme 2 use a linear increase method. The difference is that Scheme 2 uses multiple linear stages to increase the power, while Scheme 1 increases it linearly. Of course, in actual use, a non-linear increase method can also be used, gradually increasing the power from the initial power to the rated power, thus forming Scheme 3.

[0039] refer to Figure 5 Option 3: Starting from the initial power, the power is continuously increased non-linearly with a constantly varying increment until the rated power is reached. The variation of this increment is as follows: Figure 5 and Figure 6 The curved part in the text.

[0040] Figures 3-6 In the diagram, the vertical axis P represents the input power, and the horizontal axis t represents time. Figure 3 and Figure 4The two illustrated schemes employ digital power control to gradually increase the initial power to the rated power. Figure 5 and Figure 6 The schematic diagram illustrates a scheme that uses analog power control to continuously increase the power to the rated power. Figure 5 The increase in amount changed slowly at first and then rapidly. Figure 6 The increase in voltage is rapid at first and then slows down. In an optional implementation, the semiconductor cooler 3 operates at its rated voltage. The operating power during operation is the second preset input power, and the voltage input to the semiconductor cooler 3 at this time is the rated voltage. Therefore, the input voltage supplied to the semiconductor cooler 3 under the first preset input power state is ,0< <1, This represents the adjustment coefficient, which is a constant. Its value can be adjusted according to actual conditions, thereby achieving different input power during the startup and normal operation phases by adjusting the input voltage of the thermoelectric cooler 3 at startup and after it enters normal operation. Therefore, in response to the startup command of the thermoelectric cooler 3, the input voltage supplied by the thermoelectric cooler 3 is controlled to be... And continuously preset duration After operation, the input voltage of the control semiconductor cooler 3 is adjusted to... .

[0041] Set a preset duration The purpose is that the semiconductor cooler 3 uses voltage as the... During the operating period, the internal resistance of the thermoelectric cooler 3 will increase due to the gradual rise in the temperature of the thermoelectric material. Therefore, by the duration... Maintain the voltage at This ensures that the input voltage of the semiconductor cooler 3 is from Rise to At this time, no overload current will be generated. The greater the first preset input power of the semiconductor cooler 3, the longer the duration. The larger, that is, the longer the duration It maintains a positive correlation with the first preset input power.

[0042] In an optional implementation, in order to adjust the preset duration Different values ​​can be selected to adapt to different ambient temperature conditions. The preset duration can be determined by detecting the operating current of the semiconductor cooler 3. The value of is determined by the current operating current. If the current operating current is greater than or equal to the preset current threshold, the duration from the start of the dehumidifier to the current moment is taken as the preset duration. Thus, from the current moment, the semiconductor cooler 3 operates at the second preset input power and enters the dehumidification working state. Because the ambient temperature of the dehumidifier varies, the rate of change in the operating current of the semiconductor cooler 3 after the dehumidifier starts will also vary. Therefore, by detecting the current change in real time, it can adaptively and promptly switch to the second preset input power to enter the dehumidification working state.

[0043] The current time can be the moment when the operating current is first detected to be greater than or equal to the preset current threshold, or it can be the moment when the operating current is detected to be greater than or equal to the preset current threshold for the second, third or subsequent time.

[0044] The ambient temperature here refers to the temperature of the space where the dehumidifier is located, that is, the temperature outside the dehumidifier itself.

[0045] The lower the ambient temperature that a dehumidifier needs to adapt to, the higher its adjustment coefficient will be. The smaller the value, the lower the adjustment coefficient. The relationship between the dehumidifier and the ambient temperature it maintains is positively correlated. The lower the minimum ambient temperature a dehumidifier needs to adapt to, the greater the theoretical maximum power required by the dehumidifier.

[0046] By duration Maintaining a positive correlation with the first preset input power and the adjustment coefficient The temperature is positively correlated with the ambient temperature of the dehumidifier, which prevents the semiconductor cooler 3 from being overloaded when it is powered on at the lowest ambient temperature, thus ensuring the reliable operation of the power supply that powers the semiconductor cooler 3.

[0047] When the dehumidifier is started, the semiconductor cooler 3 inside the dehumidifier is also started simultaneously. Therefore, responding to the dehumidifier start command is also responding to the semiconductor cooler 3 start command.

[0048] For example, taking a dehumidifier that needs to adapt to an ambient temperature of -35℃ to 70℃ as an example, the ambient temperature when the semiconductor cooler 3 starts up is -35℃, which is also the lowest ambient temperature. The rated power of the semiconductor cooler 3 is 50-120 W, and the input voltage of the semiconductor cooler 3 during the startup phase is 60% of the rated voltage, that is... =60%. And after 2 minutes, the input voltage is adjusted to the rated voltage, that is... =2 min. This ensures that the semiconductor cooler 3 starts up with a lower first preset input power and then continues to work with a second preset input power. The first preset input power is about 60% of the maximum power, and the maximum power is also the theoretical maximum input power required for the lowest ambient temperature. This satisfies the requirement of high power at low temperatures and enables applicability over a wide temperature range from low temperature (-35 ℃) to high temperature (70 ℃).

[0049] For example, taking into account both the peak voltage and dehumidification capacity of the semiconductor cooler 3, For example, when the required ambient temperature is -35℃ to 70℃, then... And preferably 60%.

[0050] This step ensures that the dehumidifier operates at a lower initial ambient temperature during startup and a higher initial ambient temperature during normal operation. This significant temperature difference results in a substantial difference in the input power of the thermoelectric cooler 3 between the two states. By controlling the input power during startup to be lower than that during normal operation, this step prevents wasted power reserve for the thermoelectric cooler 3 and allows it to adapt to a wider temperature range. Furthermore, by setting the duration... The soft-start method can avoid current overload, ensure reliable operation of the power supply, and solve the problem mentioned in point 1 of the background technology.

[0051] When the semiconductor cooler 3 is Operating voltage (i.e., input voltage) and duration of startup Afterward, the thermoelectric cooler 3 enters normal operating condition. After the thermoelectric cooler 3 has been operating normally for a period of time, in order to avoid the second problem described in the background art, further control of the thermoelectric cooler 3 is needed to determine suitable conditions for initiating defrosting and de-icing operations. Therefore, this embodiment proposes step 2. Of course, in actual use, step 1 is not required; any condition that meets the need for defrosting and de-icing operations can trigger step 2.

[0052] Step 2: After the semiconductor cooler enters the dehumidification working state, the following steps will be repeated until the dehumidifier successfully defrosts and defrosts: The current temperature of the cold end surface of the thermoelectric cooler and the ambient temperature of the sampled data are obtained. Based on the ambient temperature collected in this study, a preset temperature threshold corresponding to the current temperature of the surface of the thermoelectric cooler was determined. The system determines whether the current temperature of the cold end surface of the thermoelectric cooler is lower than the corresponding preset temperature threshold. If so, it controls the dehumidifier to perform defrosting and de-icing actions. When the dehumidifier performs defrosting and de-icing actions for a first preset time, the temperature of the semiconductor cooler surface is re-acquired. Determine whether the temperature re-collected on the surface of the thermoelectric cooler is greater than the preset defrosting end temperature threshold. If so, return to the step of obtaining the ambient temperature collected this time. Among them, the preset temperature threshold is <0℃ < the preset end defrosting temperature threshold.

[0053] More specifically, the system determines the pre-defined temperature range within which the detected current ambient temperature falls, and establishes a corresponding preset temperature threshold based on this range. Each pre-defined temperature range corresponds to one preset temperature threshold, while different ranges correspond to different thresholds. This ensures that the preset temperature thresholds are the same for all ambient temperatures within the same range, and different for all ambient temperatures within different ranges. Furthermore, based on the current ambient temperature range, the system compares the current temperature of the cold end 2 of the thermoelectric cooler 3 with the corresponding preset temperature threshold. Based on this comparison, the system adjusts whether the dehumidifier enters defrosting / defrosting mode. During defrosting / defrosting, the thermoelectric cooler 3 stops working, effectively shutting off the power supply to the thermoelectric cooler 3.

[0054] This step involves determining whether the dehumidifier should enter defrosting / defrosting mode after the thermoelectric cooler 3 enters dehumidification mode, based on the pre-defined temperature range of the current ambient temperature and the current surface temperature of the thermoelectric cooler 3. In defrosting / defrosting mode, the thermoelectric cooler 3 stops working. This allows the dehumidifier to continuously approach the dew point temperature corresponding to the current ambient temperature by dividing the temperature range into multiple segments. Then, the surface temperature of the cold end 2 of the thermoelectric cooler 3 is compared with a preset temperature threshold. This comparison utilizes the principle that the thermoelectric cooler 3 achieves condensation by using the temperature difference between the surface temperature of the cold end 2 and the ambient temperature. Therefore, different preset temperature thresholds need to be set for different temperature ranges, and the preset temperature thresholds decrease sequentially according to the temperature range segment division from high to low.

[0055] The pre-defined temperature range segments include at least two temperature range segments. These segments are defined based on the defrost temperature achievable by the cold end 2 of the semiconductor cooler 3 after cooling, and must cover the entire ambient temperature range. For example, using 1℃ as the dividing point, ≥1℃ is the first temperature range segment, and <1℃ is the second temperature range segment. The first temperature range segment corresponds to a preset temperature threshold, for example, -10℃, and the second temperature range segment corresponds to another preset temperature threshold, for example, -12℃. In actual use, more temperature range segments can be set. For example, ≥1℃ is the first temperature range segment, [8℃, 1℃) is the second temperature range segment, and ≤8℃ is the third temperature range segment. Alternatively, three temperature dividing points can be set to form four temperature range segments (first temperature range segment - fourth temperature range segment).

[0056] After the defrosting and de-icing process is completed, power is restored to the semiconductor cooler 3, which means that the semiconductor cooler 3 restarts and continues to work, allowing the dehumidifier to continue dehumidifying.

[0057] More specifically, the current ambient temperature and the current temperature of the cold end 2 surface of the thermoelectric cooler 3 are compared with multiple preset temperature thresholds. Based on the comparison results, the dehumidifier is adjusted to enter defrost / defrost mode. When in defrost / defrost mode, the thermoelectric cooler 3 stops working, i.e., the power supply to the thermoelectric cooler 3 is turned off. After the defrost / defrost operation is completed, the power supply to the thermoelectric cooler 3 is restored, i.e., the thermoelectric cooler 3 restarts and continues to work, allowing the dehumidifier to continue dehumidifying. For a detailed implementation process, refer to [reference needed]. Figure 7 Taking the setting of two temperature boundary points to form three temperature range segments as an example, the specific implementation steps include: Step 21: Collect the current ambient temperature The current temperature of the cold end 2 surface of the semiconductor cooler 3 .

[0058] The current ambient temperature and the current temperature of the cold end 2 surface can be collected by installing a first ambient temperature sensor and a second ambient temperature sensor inside the dehumidifier. To ensure the accuracy of the data collection, the first and second ambient temperature sensors are installed in appropriate positions according to the specific structure of the dehumidifier. For example, the second ambient temperature sensor is installed near the surface of the cold end 2, and the first ambient temperature sensor is installed away from the surface of the cold end 2. However, both the first and second ambient temperature sensors are located within the airflow channel of the fan 1, that is, on the path of airflow. Since the installation positions of the first and second ambient temperature sensors are structural improvements, their specific installation positions are not limited in this embodiment and will not be described in detail here.

[0059] Step 22: Determine the current ambient temperature In this example, the temperature range is divided into three segments: 1°C and 8°C, depending on which pre-defined temperature range it falls into. If the current ambient temperature... It falls within the first temperature range, that is... If so, proceed to step 23; otherwise, it means the current ambient temperature... It falls into one of the other two temperature ranges. Specifically, if... ≤ If it falls within the second temperature range, then proceed to step 24; if If the temperature falls within the third temperature range, then proceed to step 25.

[0060] In this example, 1℃, 8 ℃. Of course, other values ​​can be used in actual use. As the first preset temperature boundary point, as The second preset temperature boundary point. Of course, more temperature boundary points can be set, such as a third preset temperature boundary point, a fourth preset temperature boundary point, and so on.

[0061] Step 23: Determine the current temperature of the surface of cold end 2. With the first preset temperature threshold Size relationship, ,like If the power supply to the thermoelectric cooler 3 is turned off, the thermoelectric cooler 3 will stop working and begin the defrosting and de-icing process. After the defrosting and de-icing process is completed, step 26 will be executed. Otherwise, that is, if... If so, proceed directly to step 26.

[0062] In this step, the power supply to the thermoelectric cooler 3 is turned off, that is, the power to the thermoelectric cooler 3 is cut off. Under these circumstances, the heat from the hot end 4 of the thermoelectric cooler 3 will be conducted to the cold end 2 of the thermoelectric cooler 3, thereby causing the frost or ice layer on the surface of the cold end 2 to melt into water, and thus drain the water away.

[0063] In order to better drain the melted water, the fan 1 is started when the semiconductor cooler 3 is powered off, that is, in the defrosting and de-icing state. When the fan 1 is working, it forms an airflow. Under the strong action of the airflow, the frost or ice on the surface of the cold end 2 can be melted faster and the water can be drained away.

[0064] In one optional implementation, -10℃. Of course, in actual use, other temperature values ​​can also be used, for example, -8 ℃.

[0065] Step 24: Determine the current temperature of the cold end 2 surface. With the second preset temperature threshold Size relationship, ,like If the power supply to the thermoelectric cooler 3 is turned off, the thermoelectric cooler 3 will stop working and begin the defrosting and de-icing process. After the defrosting and de-icing process is completed, step 26 will be executed. Otherwise, that is, if... If so, proceed directly to step 26.

[0066] In one optional implementation, -12℃. Of course, in actual use, other temperature values ​​can also be used, for example, -14 ℃.

[0067] Step 25: Determine the current temperature of the cold end 2 surface. With the third preset temperature threshold Size relationship, ,like If the power supply to the thermoelectric cooler 3 is turned off, the thermoelectric cooler 3 will stop working and begin the defrosting and de-icing process. After the defrosting and de-icing process is completed, step 26 will be executed. Otherwise, that is, if... If so, proceed directly to step 26.

[0068] Step 26: Determine the current temperature of the cold end 2 surface. With the fourth preset temperature threshold Size relationship, ,and ,like If so, proceed to step 21; otherwise, that is, if If the defrosting and de-icing operation ends, power supply to the semiconductor cooler 3 is restored, allowing the semiconductor cooler 3 to return to normal working state. After the normal working state is restored, the dehumidifier will continue to enter the dehumidification working state and jump to step 21 again.

[0069] In the example above, the pre-defined temperature range is determined based on the collected ambient temperature, thereby determining the preset temperature threshold corresponding to that temperature range. In practical applications, the preset temperature threshold can be determined without using a pre-defined temperature range. Instead, a preset algorithm can be used, following a mapping principle between the current ambient temperature and the preset temperature threshold. This mapping principle states that the lower the ambient temperature, the smaller the preset temperature threshold. For example, by establishing a mapping relationship between each ambient temperature and the preset temperature threshold based on a specific mathematical formula, a corresponding preset temperature threshold can be determined for each current ambient temperature.

[0070] refer to Figure 7 , Figure 7 To illustrate step 2, the diagram illustrates a process flow. The "end" in the diagram could be the process of exiting the step of determining whether to perform defrosting / de-icing after receiving an end command, or it could be any other processing step; no limitation is made. Defrosting in the diagram includes both defrosting and de-icing, representing the defrosting / de-icing operation. The refrigerator refers to the semiconductor refrigerator 3. Figure 7 In the given example, 1 ℃, 8 ℃ -10 ℃, -12 ℃ -15℃ 5 ℃.

[0071] In this example, the temperature order can be determined according to a preset rule, including a temperature order determined from high to low, or a temperature order determined from low to high, or starting from any temperature boundary point and determining the next temperature boundary point sequentially or randomly until the last temperature boundary point is determined, thereby determining the temperature order.

[0072] refer to Figure 8 This illustrates the example of setting three temperature boundary points to form four temperature range segments. The specific implementation steps are similar to the process of setting two temperature boundary points to form three temperature range segments, so they will not be repeated here.

[0073] In the two examples above, determining which pre-defined temperature range the current ambient temperature falls into is done by comparing it with preset temperature boundary points. At least one temperature boundary point must be set, thus dividing the temperature range into at least two segments. The temperature sequence can be determined sequentially or randomly, starting from any temperature boundary point, either from high to low or low to high, until the last boundary point is determined. The current ambient temperature is then compared with each of these temperature boundary points. Figure 7 and Figure 8 The illustrations show comparisons made from highest to lowest temperature to determine which temperature range the current ambient temperature falls within.

[0074] This step is to prevent frost and / or ice formation on the cold end 2 surface of the thermoelectric cooler 3. The thermoelectric cooler 3 achieves cooling based on a temperature difference, that is, a temperature difference is formed between the cold end 2 and the hot end 4. When the temperature of the hot end 4 of the thermoelectric cooler 3 decreases, the temperature of the cold end 2 of the thermoelectric cooler 3 will also decrease. When the ambient temperature is low, the temperature of the cold air surface will be below zero degrees Celsius, causing the condensate from the condensed air to frost or freeze on the surface of the cold end 2, making it impossible to drain the condensate and thus impossible to regulate humidity. Therefore, it is necessary to perform defrosting and de-icing operations. To prevent the defrosting and de-icing operations from starting too early or too late, setting a defrosting temperature point to determine whether to start the defrosting and de-icing operation is crucial. Setting it too high will cause the defrosting and de-icing operation to start too early. Since defrosting and de-icing depends on the thermoelectric cooler 3 operating with power off or at low voltage (i.e., low power consumption), it will affect the dehumidification capacity of the thermoelectric cooler 3.

[0075] In this step, segmented adaptive control technology is used to address the problem of premature or delayed defrosting / de-icing activation caused by inaccurate defrosting temperature settings. Furthermore, it is based on the temperature difference between the cold end 2 surface temperature of the thermoelectric cooler 3 and the ambient temperature. To estimate the ambient temperature at which frost or ice begins to form on the surface of cold end 2. For example, suppose the temperature difference between the surface temperature of cold end 2 and the ambient temperature is... When frost or ice begins to form at 15°C, the surface temperature of cold end 2 is -3°C. What is the ambient temperature? 12 ℃. This means that if the current ambient temperature is ≤12 ℃, the surface of the cold end 2 of the thermoelectric cooler 3 will frost or ice up. In other words, if the current ambient temperature is < At any given time, the temperature at which frost or ice can form on the surface of cold end 2 varies depending on the ambient temperature. This temperature is also the defrosting temperature that determines whether to initiate defrosting and de-icing operations.

[0076] In this step, two preset ambient temperature thresholds (a first preset ambient temperature threshold and a second preset ambient temperature threshold) are set with successively decreasing values. These two preset ambient temperature thresholds are relatively close; "relatively close" means the difference between the two preset ambient temperature thresholds is within a preset threshold range. This preset threshold range can be set to a relatively small value as needed. For example, Figure 2 As shown in the example, the difference between the first preset ambient temperature threshold (1 ℃) and the second preset ambient temperature threshold (8 ℃) is 3. Therefore, the preset threshold can be set to 3. By setting two preset ambient temperature thresholds that decrease numerically, the temperature is then compared step-by-step (i.e., in segments) with these two preset ambient temperature thresholds based on the currently measured ambient temperature. Furthermore, in the first comparison (i.e., the comparison...) and When comparing the current ambient temperature (size), if the current ambient temperature is lower than the first preset ambient temperature, it means that the current ambient temperature may be low, which means that there may be frost or ice on the cold end 2. In order to avoid prematurely starting the defrosting and de-icing operation, a second comparison (i.e., comparison) is required. and (Size), because the second preset ambient temperature threshold is smaller in the second comparison, and the second preset ambient temperature threshold is already small (e.g., 8 ℃), if the dehumidifier starts to dehumidify, the surface temperature of the cold end 2 of the semiconductor cooler 3 will quickly drop below zero (tested to -5 ℃) in a very short time (tested to be more than ten seconds). This will cause the semiconductor cooler 3 to trigger the defrosting and defrosting operation logic before it has time to condense or freeze, thus causing the cooler to be powered off or run at low power (defrosting and defrosting require the cooler to be powered off or run at low power). After the cooler is powered off, the surface temperature of its cold end 2 recovers and starts to dehumidify, and then it will quickly enter the defrosting and defrosting operation again. This causes the dehumidifier to frequently switch between dehumidification and defrosting and defrosting, and the actual effective dehumidification time is extremely short. It cannot effectively dehumidify. Although this can ensure that there is no frost or ice, the dehumidification effect is almost negligible.

[0077] If the current ambient temperature is greater than the second preset ambient temperature threshold, it means that the ambient temperature may be approaching the defrost temperature point. To avoid prematurely initiating defrosting and de-icing operations and to improve accuracy, it is necessary to compare the current surface temperature of the cold end 2 with the preset temperature threshold, i.e., a comparison... and If the value of the value is satisfied, it means that the current conditions are suitable for starting defrosting and de-icing operations. The same logic applies to other numerical comparisons. By comparing the value with the preset ambient temperature threshold multiple times and then combining the result of each comparison with the preset cold end surface temperature threshold, the current temperature that is close to the defrosting temperature point can be found more accurately (ideally, the two are equal). This can effectively avoid starting defrosting and de-icing operations too early (advanced) or too late (delayed).

[0078] The preset ambient temperature threshold and preset cold end surface temperature threshold can be determined based on experience or through experiments / tests simulating actual environments. The closer these preset thresholds are to real-world conditions, the more accurate the judgment in this step, meaning it's closer to the defrost temperature point to begin defrosting and de-icing operations. Furthermore, by setting more preset ambient temperature thresholds and corresponding preset cold end surface temperature thresholds, more segmented comparisons can be made to more accurately approach the defrost temperature point and initiate defrosting and de-icing operations.

[0079] This step effectively avoids starting defrosting and defrosting operations too early or too late, and prevents the dehumidifier from frequently switching between dehumidification and defrosting / defrosting. This effectively prevents frost or ice buildup on the surface of the thermoelectric cooler 3 and maintains the dehumidification operation time, ensuring optimal dehumidification performance. Therefore, step 2 solves the problem described in the background section regarding point 2.

[0080] Furthermore, by combining steps 1 and 2, the input power during both the startup and normal operation phases is considered, avoiding wasted power supply margin and preventing current overload. Moreover, once the normal dehumidification operation begins, it effectively prevents frost or ice formation on the surface of cold end 2.

[0081] Step 3: When the dehumidifier is in dehumidification mode, that is, when the semiconductor cooler 3 is in non-defrosting / defrosting operation mode, in order to prevent the dehumidifier from continuing to dehumidify even when it cannot further reduce the relative humidity of the environment, thus avoiding the dehumidifier being unable to stop and reducing energy consumption, it is necessary to force the dehumidifier to stop or operate it at low power. In this situation, the dehumidifier needs to enter a steady-state forced shutdown mode. This mode prevents the dehumidifier from failing to stop according to normal dehumidification logic by forcibly changing its operating state, including shutting down the dehumidifier or reducing its operating power. Shutting down the dehumidifier includes forcibly shutting down the semiconductor cooler 3 and / or fan 1. Reducing the dehumidifier's operating power includes operating the semiconductor cooler 3 and / or fan 1 at low power. Low power operation means operating at a preset power, which can be set to a small value as needed, where the preset power is less than the rated power. The semiconductor cooler 3 and fan 1 can be shut down by cutting off the power supply to them, thereby stopping the dehumidification process and avoiding energy waste.

[0082] Under normal circumstances, a dehumidifier primarily regulates the humidity of the space it operates in, keeping it within the target humidity threshold range. If the upper humidity threshold is exceeded, the dehumidifier activates. As dehumidification progresses and the humidity decreases, the dehumidifier stops operating when the humidity falls below the lower threshold, thus maintaining the humidity between the upper and lower thresholds. The semiconductor cooler 3 has a relatively small cooling capacity and is significantly affected by ambient temperature and humidity. During dehumidification, once the dehumidifier enters a dehumidification equilibrium state, it cannot further reduce the ambient humidity. However, the controlled humidity has not yet reached the target lower threshold. Therefore, if traditional dehumidifier control methods are used, the dehumidifier still needs to operate. However, this operation is essentially "ineffective." If the dehumidifier continues to operate at its highest power, rated power, or a relatively high power, it will affect the dehumidifier's lifespan and reliability, ultimately leading to a decrease in its dehumidification capacity. Therefore, in such situations, it is necessary to force the dehumidifier to shut down. This forced shutdown includes turning off the dehumidifier or putting it into low-power operation, that is, operating at a lower power consumption. Turning off the dehumidifier includes turning off the semiconductor cooler 3 and / or fan 1 inside the dehumidifier.

[0083] For example, the determination of whether to enter the steady-state forced shutdown mode can be made by the following conditions: if 0 < RH - RH0 ≤ preset relative humidity threshold, that is, the relative humidity of the current environment is close to the steady-state critical value but higher than the humidity lower limit value, then the dehumidifier enters the steady-state forced shutdown mode. Here, RH represents the relative humidity of the current environment, that is, the relative humidity of the space where the dehumidifier is located, and RH0 represents the target humidity lower limit threshold, which is a preset constant.

[0084] Of course, in actual use, other conditions can be used to determine whether to enter the problem forced shutdown mode. This embodiment does not impose any restrictions, as long as it can trigger the entry into the steady-state forced shutdown mode.

[0085] Steady-state forced shutdown mode: If the relative humidity change of the environment is less than or equal to the preset relative humidity change threshold within the preset data collection period, the dehumidifier's operating power will be forcibly reduced. The forced reduction of the dehumidifier's operating power includes forcibly reducing the dehumidifier's operating power to 0 so that the dehumidifier is in a shutdown state. Shutting down the dehumidifier includes shutting down the semiconductor cooler 3 and / or shutting down the fan 1. The forced reduction of the dehumidifier's operating power may also include reducing the dehumidifier to operate at a lower operating power.

[0086] In this step, the current relative humidity of the environment collected in real time is compared with the preset humidity lower limit value, and the difference is used to determine whether to forcibly reduce the dehumidifier's operating power based on the comparison result and whether the difference is ≤ a certain preset threshold. This includes forcibly reducing the dehumidifier's operating power or reducing the dehumidifier to operate at a lower power. Turning off the dehumidifier includes turning off the semiconductor cooler 3 and / or fan 1, and this can be achieved by cutting off the power supply to the semiconductor cooler 3 and fan 1.

[0087] In one alternative implementation, after receiving a command to forcibly reduce the operating power of the dehumidifier, the power supply to the fan 1 is cut off after a certain period of time.

[0088] More specifically, if 0 < RH - RH0 ≤ preset relative humidity threshold, the dehumidifier enters a steady-state forced shutdown mode. Here, RH represents the current relative humidity of the environment, i.e., the relative humidity of the space where the dehumidifier is located, and RH0 represents the target humidity lower limit threshold, which is a preset constant. Steady-state forced shutdown mode: Within a preset data collection period, if the change in relative humidity is ≤ preset relative humidity change threshold, the dehumidifier's operating power is forcibly reduced. Forcibly reducing the dehumidifier's operating power includes forcibly reducing the dehumidifier's operating power to 0, so that the dehumidifier is in a shutdown state. Shutting down the dehumidifier includes shutting down the semiconductor cooler 3 and / or shutting down the fan 1. Forcibly reducing the dehumidifier's operating power may also include reducing the dehumidifier to operate at a lower operating power > 0. The specific implementation process includes: Step 31: Collect the ambient relative humidity to obtain the current ambient relative humidity.

[0089] The ambient relative humidity can be collected at a preset sampling frequency, for example, every 1 second or 0.5 minutes, to collect the relative humidity of abnormal environments, so that the ambient relative humidity can be collected in real time.

[0090] Step 32: Determine whether the current relative humidity is greater than the target humidity lower limit threshold, and whether the current relative humidity - the target humidity lower limit threshold is less than or equal to the preset relative humidity threshold. If so, proceed to step 33.

[0091] If not, that is, if the current relative humidity is less than or equal to the target humidity lower limit threshold, and / or the difference between the current relative humidity and the target humidity lower limit threshold is large and exceeds the preset relative humidity threshold, the dehumidifier's operating power can be forcibly reduced or other processing can be performed. Among these, shutting down the dehumidifier includes shutting down the semiconductor cooler 3 and / or the fan 1. The fan 1 can be shut down after a preset time delay.

[0092] In this step, if the current relative humidity is lower than the preset lower humidity threshold, it means that the current relative humidity has deviated from (below) the allowable target humidity range. The target humidity range is between the preset lower humidity threshold (e.g., RH 20%) and the preset upper humidity threshold (e.g., RH 80%). The purpose of the dehumidifier is to maintain the relative humidity of the physical space within the desired target humidity range. Both excessively high and low humidity are unacceptable. Therefore, once a humidity level below the target lower threshold is detected, the power supply to the cooler must be immediately turned off, and the power supply to fan 1 should be simultaneously or after a delay, thereby stopping the cooler and / or fan 1 from operating.

[0093] Similarly, step 32 is only an example of whether it is necessary to trigger the entry into the steady-state forced shutdown mode, and it is not mandatory. Step 32 can be skipped and the process can proceed directly to step 33.

[0094] Step 33: After the dehumidifier enters the steady-state forced shutdown mode, within a preset collection period, collect at least two ambient relative humidity readings corresponding to different times. That is, collect the corresponding ambient relative humidity once at each of at least two different times within the preset collection period, thereby obtaining at least two ambient relative humidity readings. If the ambient relative humidity change is determined based on the ambient relative humidity collected within the preset collection period, and if the change in ambient relative humidity is ≤ a preset relative humidity change threshold, it indicates that the dehumidifier's operating power needs to be forcibly reduced. Similarly, shutting down the dehumidifier includes shutting down the semiconductor cooler 3 and / or fan 1. The fan 1 can be shut down after a preset delay. If the change is greater than or equal to the preset humidity change threshold, then you can continue to wait or perform other processing, which is not limited in this invention.

[0095] In step 3, any of Examples 1-5 can be used to determine whether the steady-state condition is met: the change in ambient relative humidity ≤ the preset relative humidity change threshold.

[0096] Example 1: Among all the ambient relative humidity samples collected within the preset collection period, if the difference between the maximum and minimum ambient relative humidity is taken as the change in ambient relative humidity, and if the change in ambient relative humidity is less than or equal to the preset relative humidity change threshold, it is considered to meet the steady-state condition, and the dehumidifier's operating power is forcibly reduced.

[0097] Example 2: Among all the environmental relative humidity samples collected within the preset collection time, select several groups of environmental relative humidity in the collection order. Each group includes two adjacent environmental relative humidity values. In the environmental relative humidity of the same selected group, the difference between the adjacent environmental relative humidity values ​​is taken as the environmental relative humidity change corresponding to each group. If there is at least one group whose environmental relative humidity change is ≤ preset relative humidity change threshold, it is considered to meet the steady state condition, and the working power of the dehumidifier is forcibly reduced.

[0098] Example 3: Among all the environmental relative humidity samples collected within the preset collection time, several groups of environmental relative humidity are selected according to the collection order. Each group includes three or more adjacent environmental relative humidity values. In the environmental relative humidity of the same selected group, the difference between the maximum and minimum environmental relative humidity is taken as the environmental relative humidity change. If there is at least one group whose corresponding environmental relative humidity change is ≤ the preset relative humidity change threshold, it is considered to meet the steady-state condition.

[0099] Alternatively, among all the environmental relative humidity samples collected within the preset collection period, select several sets of environmental relative humidity. Each set includes two non-adjacent environmental relative humidity values. In the selected environmental relative humidity of the same set, the difference between the two environmental relative humidity values ​​is taken as the corresponding environmental relative humidity change. If there is at least one set whose corresponding environmental relative humidity change is ≤ the preset relative humidity change threshold, it is considered to meet the steady-state condition.

[0100] Example 4: Among all the environmental relative humidity samples collected within the preset collection period, the difference between any two environmental relative humidity samples is taken as the change in environmental relative humidity. The change in environmental relative humidity is compared with a preset relative humidity change threshold, and the number of comparison results is counted. If the number of comparison results is less than or equal to the number of the preset relative humidity change threshold, or if the number of comparison results is greater than or equal to the preset threshold, then the steady-state condition is considered to be satisfied.

[0101] Example 5: Calculate the rate of change of any two ambient relative humidities within the preset collection period. If at least two ambient relative humidities have a rate of change ΔRH ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. According to the collection order, the i-th ambient relative humidity (RH) i and the j-th ambient relative humidity RH j The formula for calculating the rate of change ΔRH is as follows, where i < j: △RH=|RH j -RH i | / RH i In the formula, || represents taking the absolute value.

[0102] Example 6: After removing outliers, process them according to any of Examples 1-5. Outliers may be noise collected, or anomalies caused by other reasons. For example, among all the ambient relative humidity values ​​collected within the preset collection period, one or more values ​​may be significantly higher or lower than normal. These outliers should not be allowed to interfere with the normal ambient relative humidity changes.

[0103] In the above example, each collected ambient relative humidity corresponds to a time. Therefore, the difference between the ambient relative humidity at different times can be compared with a preset relative humidity change threshold to determine whether the steady-state condition is met. For example, select the ambient relative humidity corresponding to a certain time, and after a preset time, select the ambient relative humidity corresponding to another time. Calculate the difference or quotient between the two ambient relative humidity values, and then compare it with the preset humidity change threshold. Based on the comparison result, determine whether the steady-state condition is met.

[0104] In practical use, other preset rules can also be used to determine whether the change in relative humidity is less than or equal to the preset relative humidity change threshold. For example, the difference between two relative humidity values ​​can be converted into a quotient. This is just a mathematical conversion, and the essence is the same, and the effect is also the same. Whether the change in relative humidity is within a very small range can be determined based on the actual situation, so the specific situations cannot be exhausted.

[0105] If, within a certain period of time (i.e., the preset data collection period, for example, 0.5-2 hours), the change in ambient relative humidity (i.e., the change between the maximum and minimum ambient relative humidity) is less than a certain value (i.e., the preset humidity change threshold, for example, 1%-2%), then the dehumidifier is considered to have entered a steady-state equilibrium working state. Even if the dehumidifier continues to dehumidify, it cannot further reduce the ambient relative humidity. This is equivalent to the current ambient relative humidity having reached the lower limit threshold. Therefore, it is also necessary to forcibly reduce the working power of the dehumidifier.

[0106] The preset data collection duration can be adjusted according to actual conditions. For example, in this instance, it can be set to 0.5-2 hours, and it should not be set too high or too low. Similarly, the preset relative humidity change threshold can also be adjusted according to actual conditions. For example, in this instance, it can be set to 1%-2%, and it should not be set too high or too low. If the relative humidity does not change significantly within the 0.5-2 hour period, for example, if the humidity change is ≤1%-2%, it can be considered that the relative humidity can no longer decrease, and therefore, it is necessary to turn off the dehumidifier.

[0107] This step effectively prevents the dehumidifier from continuing to operate when the relative humidity of the environment cannot be further reduced, while maintaining the dehumidification capacity within the target dehumidification range. This provides stability and reliability to the dehumidifier and saves energy consumption.

[0108] It should be noted that this step can be performed independently and is not necessarily required after completing steps 1 and 2. Of course, it can also be performed after completing step 2 or during the execution of step 2.

[0109] In an optional implementation, during this step, when the dehumidifier forcibly reduces its operating power, both the semiconductor cooler 3 and the fan 1 stop working. In this state, the ambient temperature sensor and the ambient relative humidity sensor are located on the airflow duct of the fan 1. Without airflow, the temperature and humidity readings collected by these sensors are inaccurate, meaning they deviate significantly from the actual ambient temperature and relative humidity. Therefore, a sampling method to improve sampling accuracy is needed. To avoid inaccurate temperature and humidity data after the dehumidifier forcibly reduces its operating power, either Scheme 1 or Scheme 2 can be used.

[0110] Option 1: In response to the dehumidifier shutdown command, the semiconductor cooler 3 is turned off, causing it to stop working. Fan 1 stops running after a first preset running time T1, and then stops running for a second preset running time T2. , The preset threshold is a constant. That is, within one cycle, fan 1 runs for a first preset running time T1, and then stops running for a second preset running time T2. This results in the time fan 1 is stopped being much longer than the time it runs. For example, fan 1 runs for 3 minutes, then stops for 30 minutes; then, fan 1 continues to run for 3 minutes, then stops for 30 minutes, and so on, alternating until the cycle ends. During the alternating operation and stopping of fan 1, the thermoelectric cooler 3 remains in the off state, that is, in a stopped state.

[0111] For example, T1 and T2 can also take other values, such as T1 = 2 min, T2 = 35 min, or other values. Since it is impossible to exhaustively list all the specific values ​​of T1 and T2, they will not be elaborated here.

[0112] When fan 1 is on, the airflow generated by fan 1 flows through the airflow channels where the ambient temperature sensor and the ambient relative humidity sensor are located, thereby enabling the collection of accurate ambient temperature and relative humidity data. Furthermore, fan 1 is off for most of the time, thus reducing mechanical wear and energy consumption caused by the fan's rotation during startup, while still ensuring accurate ambient temperature and relative humidity data collection, thereby extending the lifespan of fan 1.

[0113] Option 2: In response to the dehumidifier shutdown command, the semiconductor cooler 3 is turned off, causing it to stop working. Fan 1 operates at a preset power level. While the preset power is low, it is sufficient to generate airflow, strong enough to move air through the airflow channel. The preset power level can be set as needed, and it is lower than the operating power of fan 1 during dehumidification, meaning it operates at low power. By reducing the power of fan 1, energy consumption is reduced, and the airflow can circulate in real time past the ambient temperature and relative humidity sensors, allowing for accurate real-time monitoring of ambient temperature and relative humidity.

[0114] refer to Figure 9 In one optional implementation, during any of the above steps, after the dehumidifier starts and enters the dehumidification working state, the dehumidifier will dehumidify, thereby causing condensation to form on the surface of the cold end 2 of the semiconductor cooler 3. To ensure the dehumidification effect, the condensate needs to be drained in a timely manner.

[0115] In addition, to better ensure the dehumidification effect, the dehumidifier includes a cabinet, a semiconductor cooler 3 and a fan 1 installed in the inner cavity of the cabinet. The fan 1 is located on one side of the semiconductor cooler 3. The airflow generated by the fan 1 when it is working can cover the cold end 2 and the hot end 4 of the semiconductor cooler 3. The airflow can cover part or all of the cold end 2, and the same airflow can cover part or all of the hot end 4.

[0116] The housing is equipped with an air inlet 7. For example, a fan 1 is installed at one end of the housing, and the air inlet 7 is located at the other end of the housing opposite to the fan 1. The fan 1 generates airflow along the air inlet 7 towards the fan 1. That is, the air inlet end of the fan 1 faces the air inlet 7, and the air outlet end faces away from the air inlet 7 and is located on the housing. The air outlet end is connected to the outside of the housing, so that the airflow can flow out of the housing through the fan 1, that is, out of the dehumidifier. After the fan 1 is started, the impeller inside the fan 1 rotates. Since the air inlet end faces the air inlet 7, it draws in air from one side of the air inlet 7 and discharges it through the air outlet end, thereby forming an airflow along the air inlet 7 towards the fan 1.

[0117] The cold end 2 and the hot end 4 of the semiconductor cooler 3 share a common air inlet 7, that is, a portion of the air flowing into the housing from the air inlet 7 flows through the cold end 2 and the hot end 4 respectively.

[0118] The dehumidifier also includes a drainage component, which is installed at one end of the air inlet 7. The drainage component is used to drain the condensate formed on the surface of the cold end 2, that is, to the outside of the dehumidifier.

[0119] For example, the drainage assembly includes a water collection box 5 and a water outlet 6. One side of the water collection box 5 has a groove for collecting condensate, and the water outlet 6 is located on the other side and communicates with the groove, allowing the condensate in the groove to be discharged to the outside through the water outlet 6. The water collection box 5 is located between the thermoelectric cooler 3 and the air inlet 7, and at least a portion of the water outlet 6 extends outside the air inlet 7. The water collection box 5 does not completely obstruct the air inlet 7, allowing at least a portion of the airflow from the air inlet 7 to flow into the cold end 2 and the hot end 4. This also allows the airflow ratio from the air inlet 7 to the cold end 2 and the hot end 4 to be adjusted by changing the position of the water collection box 5.

[0120] For example, the water outlet 6 and the water collection box 5 are an integral structure. In actual use, they can also be two independent parts, with the water outlet 6 and the water collection box 5 fixedly or detachably connected together, and the water outlet 6 communicating with the groove of the water collection box 5.

[0121] When the dehumidifier is in use, its installation orientation must meet condition one. Installation orientation refers to the location of the dehumidifier in the application environment: Condition 1: The direction from fan 1 to air inlet 7 is consistent with the direction of gravity.

[0122] The dehumidifier is installed in a direction that meets condition one, that is, the dehumidifier is installed vertically along the direction from the fan 1 to the air inlet 7. At this time, the air inlet 7 is located at the lower end, the fan 1 is located at the upper end, and the direction of gravity is exactly the same as the direction from the fan 1 to the air inlet 7.

[0123] When the dehumidifier is in operation, the airflow direction of fan 1 is exactly opposite to the flow direction of the condensate under gravity. The condensate drains from fan 1 to air inlet 7, which is the direction of gravity; the airflow direction is from air inlet 7 to fan 1, and the airflow direction is exactly opposite to the drain direction. Under this structural constraint, a negative pressure is formed in the area where the water outlet 6 and the water collection box 5 are located, and the airflow will hinder the draining. To reduce the impact of airflow hindering the draining, step 4 is provided.

[0124] Step 4 involves promptly draining the water from the surface of the cold end 2 of the semiconductor cooler 3 during the period when the dehumidifier is in dehumidification mode or after it has been turned off. This reduces secondary evaporation of condensate in the water collection device within the dehumidifier, thereby enhancing its dehumidification capacity. Therefore, Step 4 must be executed outside of the sampling period; that is, it is prohibited to execute Scheme 1 or Scheme 2 during Step 3 to avoid conflicting with the execution scheme adopted during sampling. Preferably, Step 4 is executed when the dehumidifier is in dehumidification mode.

[0125] Whether step 4 needs to be executed can be determined by setting a dehumidification enhancement command. Step 4 will be executed when the chef's enhancement command is received; otherwise, step 4 will not be executed.

[0126] Step 4: Within one cycle, after fan 1 runs for the first duration 'a', fan 1 stops running for the second duration 'b', and... c is a preset ratio threshold, c > 1. Then fan 1 continues to enter the next cycle, that is, after stopping for the second duration b, fan 1 continues to run for the first duration a, and then stops for the second duration b, and so on, until the processing ends.

[0127] The first duration 'a' needs to be much longer than the second duration 'b'. This way, after the fan 1 has been running for a long time, it will stop running for a short period of time. During this period of stopping, no airflow will be generated at either the cold end 2 or the hot end 4 of the semiconductor cooler 3, thus eliminating the obstruction of airflow to the condensate. Under the action of gravity, the condensate can flow from the cold end 2 into the drainage component in a timely manner and be discharged from the outside of the dehumidifier through the drainage component.

[0128] During the period when fan 1 stops running, the semiconductor cooler 3 is still powered and remains in operation, that is, the semiconductor cooler 3 continues to dehumidify.

[0129] The purpose of stopping fan 1 is to eliminate the influence of the airflow generated by fan 1 on the condensate under gravity, thus ensuring that the condensate can be discharged smoothly. Other methods can also be used to control the fan's operating state, including: controlling the proportion of fan operation time, controlling the fan's operating power, adjusting the fan's installation position, adjusting the fan's orientation angle, adjusting the fan's airflow direction, or controlling the fan's air intake.

[0130] Specifically, in scheme b: Fan 1 operates at low power, thus failing to generate effective airflow, or the generated airflow is insufficient to reach the surface of the cold end 2 of the thermoelectric cooler 3, or although the generated airflow can reach the surface of the cold end 2 of the thermoelectric cooler 3, its airflow intensity is insufficient to prevent condensate from being discharged under gravity. In this scheme, the installation position of fan 1 and thermoelectric cooler 3 are spaced apart, thus there is a distance between them. Additionally, the air inlet 7 is also some distance from the surface of the cold end 2 of the thermoelectric cooler 3.

[0131] Option c: Fan 1 rotates in the opposite direction, so that the airflow generated by Fan 1 changes from being opposite to the direction of condensate drainage to being in the same direction as the drainage. This not only does not hinder the drainage of condensate, but also works with gravity to promote the drainage of condensate, thus accelerating the drainage of condensate.

[0132] The direction of fan 1 rotation means that the blades of fan 1 change from the original clockwise rotation to the reverse rotation (counterclockwise), or from the original reverse rotation (counterclockwise) to the clockwise rotation (clockwise).

[0133] Option d: Adjust the installation position of fan 1 so that the airflow generated by fan 1 blows towards other areas, but prevents it from blowing towards the area where the cold end 2 of the thermoelectric cooler 3 is located. In other words, the airflow generated by fan 1 blows towards a designated area, which does not include the area where the cold end 2 is located. The position of fan 1 can be adjusted by moving the installation position of fan 1, but the airflow direction of fan 1 is still opposite to the drainage direction, that is, still along the direction from the air inlet 7 to fan 1.

[0134] Option e: Adjust the orientation angle of fan 1 so that the airflow generated by fan 1 blows towards other areas, preventing it from blowing towards the surface of the cold end 2 of the thermoelectric cooler 3, or allow a portion of the airflow to blow towards the surface of the cold end 2 of the thermoelectric cooler 3, while preventing most of the airflow from blowing towards the surface of the cold end 2 of the thermoelectric cooler 3. In this way, although some airflow can blow towards the surface of the cold end 2 of the thermoelectric cooler 3, it is not enough to obstruct the drainage of condensate. Compared with option d, this option does not require adjusting the installation position of fan 1, but only changing the orientation angle of fan 1. For example, a fan 1 that can be steered and can stop at different angles can be installed.

[0135] Option f: Install a flow guide component with a channel, and install a directional component with an adjustable angle within the channel. Adjust the directional component to the second angle. When the adjusting member is at the first angle, the airflow flows towards the surface of the thermoelectric cooler 3; when the adjusting member is at the second angle, the airflow is prohibited from flowing towards the surface of the thermoelectric cooler 3, that is, the airflow is restricted to the surface of the thermoelectric cooler 3, and flows to other areas, thereby guiding the airflow generated by the fan 1 to other areas of the surface of the cold end 2 of the thermoelectric cooler 3 through the air guiding component. The adjustable member with controllable angle can be implemented based on existing technology. Since this solution is not an improvement on this structure, the specific structure of the adjustable member with controllable angle will not be described here.

[0136] Solution g: Prevent air intake of fan 1, i.e., restrict airflow into fan 1 (restrict air intake). For example, seal the air inlet 7 with a sealing element (such as a baffle), preventing outside air from entering fan 1 through the air inlet 7. Thus, although fan 1 is working (fan 1 is rotating), it cannot generate airflow because no air is entering. Alternatively, cover the air intake end of fan 1 with a sealing element (such as a sealing cover), which similarly prevents air from entering fan 1. Even if fan 1 is working, it cannot generate airflow because no air is entering. These structures can be implemented based on existing technology. Since this solution is not an improvement on this structure, the specific structure for preventing air intake of fan 1 will not be described in detail here.

[0137] Solution h: The cold end 2 and hot end 4 of the semiconductor cooler 3 are reversed by reversing the power supply to achieve phase commutation, so that the original cold end 2 becomes the hot end 4, and the original hot end 4 becomes the cold end 2. In this way, the condensate on the surface of the original cold end 2 can be evaporated by the heat released by the hot end 4, achieving the same effect as the condensate being discharged in the previous configuration.

[0138] In this scheme, h controls the operating state of the thermoelectric cooler 3. This means that in addition to controlling the fan's operating state, it also controls the operating state of the thermoelectric cooler 3 to ensure proper drainage. Controlling the operating state of the thermoelectric cooler 3 can replace controlling the operating state of the fan 1, or it can include controlling the operating state of the thermoelectric cooler 3 in addition to controlling the operating state of the fan 1. Controlling the operating state of the thermoelectric cooler 3 involves reversing the polarity of the cold end 2 and the hot end 4 of the thermoelectric cooler 3 by reversing the power supply, so that the original cold end 2 becomes the hot end 4, and the original hot end 4 becomes the cold end 2.

[0139] In an optional implementation, after the dehumidifier enters the dehumidification working state, and condensation is detected on the surface of the cold end 2 of the semiconductor cooler 3, step 4 is then executed.

[0140] Whether condensation has formed on the surface of cold end 2 can be detected by sensors, vision (taking pictures) or other existing technologies. Since these are existing technologies, they will not be described in detail here.

[0141] For example, the first duration a = 5 minutes, and the second duration b = 10 seconds, i.e., a / b = 10, c ≤ 10. Another example: the first duration a = 30 minutes, b = 5 seconds; the first duration a = 25 minutes, b = 30 seconds; the first duration a = 15 minutes, b = 60 seconds. With these two duration ratios, the running time of fan 1 is much longer than the off-duty time. For dehumidification, this off-duty period has almost no impact on dehumidification and minimal impact on the cooling capacity of the cold end 2 of the semiconductor cooler 3; that is, the impact of such a short off-duty time on the dehumidification of the dehumidifier is negligible. However, during the time fan 1 is off-duty, condensate can be drained in time, reducing secondary evaporation of condensate in the drainage assembly, thus effectively increasing the dehumidification capacity.

[0142] In practical use, the first duration 'a' and the second duration 'b' can also take other values. For example, a = 4 minutes and b = 7 seconds. Of course, other values ​​can also be taken, but we will not exhaustively list the specific values ​​for these two durations here.

[0143] This step, by setting the ratio of the duration of fan 1's stop operation to its running duration, takes into account the following situation: If fan 1 is directly shut off for an extended period without airflow, the thermoelectric cooler 3 cannot exchange heat, and therefore dehumidification cannot be achieved. Thus, fan 1 cannot be directly shut off during dehumidification operation; therefore, fan 1 cannot be shut off for an extended period, and airflow will inevitably exist. At the same time, the structural relationship between fan 1 and thermoelectric cooler 3 cannot be altered to change the airflow direction.

[0144] In this situation, by stopping fan 1 for an extreme period of time every so often, the condensate can be drained without affecting or with minimal impact on the cooling and dehumidification effects.

[0145] It should be noted that step 4 can be performed independently or within any of the above steps. Step 4 effectively removes the condensate, thus resolving the problem described in point 4 of the background art.

[0146] The above treatments can effectively solve the problems mentioned in the background technology, including improving the service life of the dehumidifier, preventing frost or ice buildup on the cold end 2 of the semiconductor cooler 3 inside the dehumidifier, ensuring timely drainage of condensate, guaranteeing dehumidification effect, accurately collecting ambient temperature and relative humidity, and reducing energy consumption.

[0147] The embodiments disclosed in this specification are merely illustrative of one aspect of the invention, and the scope of protection is not limited to these embodiments. Any other functionally equivalent embodiments fall within the protection scope of this invention. Those skilled in the art can make various other corresponding changes and modifications based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this invention.

Claims

1. A method for controlling the steady-state balance of a dehumidifier, characterized in that, include, When the dehumidifier is in dehumidification mode, based on the changes in ambient relative humidity collected within a preset collection period, the system controls whether to forcibly reduce the dehumidifier's operating power. Based on the changes in ambient relative humidity collected within a preset collection period, it is determined whether to forcibly reduce the operating power of the dehumidifier. The specific implementation process includes the following steps: The dehumidifier enters a steady-state forced shutdown mode. In this mode, if the collected ambient relative humidity meets steady-state conditions within a preset data collection period, the dehumidifier's operating power is forcibly reduced. Steady-state condition: Change in ambient relative humidity ≤ preset relative humidity change threshold. The dehumidifier includes a housing, a thermoelectric cooler and a fan installed inside the housing. The fan is located on one side of the thermoelectric cooler, and the airflow generated by the fan during operation can cover both the cold and hot ends of the thermoelectric cooler, and the airflow can cover part or all of the cold and hot ends. After forcibly reducing the dehumidifier's operating power, Option 1 is also included: Option 1: In response to the dehumidifier shutdown command, the semiconductor cooler is turned off, and the fans alternate between running and turning off in the same cycle. Within the same cycle, the duration of the fan running is less than the duration of the fan being off. Adjacent fan runs and turns off are considered to be the same cycle according to the running sequence. Once the thermoelectric cooler enters dehumidification mode, it determines whether to initiate defrosting or defrosting operations based on the current ambient temperature within a pre-defined temperature range and the current surface temperature of the thermoelectric cooler. In defrosting mode, the thermoelectric cooler stops working. Each pre-defined temperature range corresponds to a preset temperature threshold, and different pre-defined temperature ranges correspond to different preset temperature thresholds. After the semiconductor cooler enters the dehumidification working state, the process also includes: cyclically executing the following steps until the dehumidifier successfully defrosts and defrosts: The current temperature of the cold end surface of the thermoelectric cooler and the ambient temperature of the sampled data are obtained. Based on the ambient temperature collected in this study, a preset temperature threshold corresponding to the current temperature of the surface of the thermoelectric cooler was determined. The system determines whether the current temperature of the cold end surface of the thermoelectric cooler is lower than the corresponding preset temperature threshold. If so, it controls the dehumidifier to perform defrosting and de-icing actions. When the dehumidifier performs defrosting and de-icing actions for a first preset time, the temperature of the semiconductor cooler surface is re-acquired. Determine whether the temperature re-collected on the surface of the thermoelectric cooler is greater than the preset defrosting end temperature threshold. If so, return to the step of obtaining the ambient temperature collected this time. Among them, the preset temperature threshold is <0℃ < the preset defrosting end temperature threshold. The preset temperature threshold determination includes determining the temperature range in which the current ambient temperature falls based on the current ambient temperature collected this time. The temperature range is pre-divided, and the corresponding preset temperature threshold is determined based on the temperature range in which the current ambient temperature falls.

2. The dehumidifier steady-state balance control method according to claim 1, characterized in that, If the collected relative humidity meets the steady-state conditions within the preset collection period, the dehumidifier's operating power will be forcibly reduced. The specific implementation process includes the following steps: Step 31: Collect and obtain the current ambient relative humidity; Step 32: After the dehumidifier enters the steady-state forced shutdown mode, collect at least two ambient relative humidity data at different times within the preset collection period. Determine the change in ambient relative humidity based on the collected ambient relative humidity data. If the change in ambient relative humidity meets the steady-state condition, then forcibly reduce the working power of the dehumidifier.

3. The dehumidifier steady-state balance control method according to claim 2, characterized in that, The determination of environmental relative humidity changes based on the environmental relative humidity collected from each instance, if the environmental relative humidity changes satisfy the steady-state condition, is achieved by any one of the following execution schemes 1-5: Implementation Plan 1: Among all collected ambient relative humidity data, the difference between the maximum and minimum ambient relative humidity is taken as the change in ambient relative humidity. If the change in ambient relative humidity is less than or equal to a preset relative humidity change threshold, it is considered to meet the steady-state condition. Implementation Plan 2: Among all the environmental relative humidity data collected within the preset collection period, select several groups of environmental relative humidity in the collection order. Each group includes two adjacent environmental relative humidity values. The difference between adjacent environmental relative humidity values ​​within the same selected group is taken as the environmental relative humidity change for each group. If at least one group has an environmental relative humidity change ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. Implementation Scheme 3: Among all the environmental relative humidity samples collected within the preset collection period, select several groups of environmental relative humidity in the collection order. Each group includes three or more adjacent environmental relative humidity values. In the selected environmental relative humidity groups, the difference between the maximum and minimum environmental relative humidity is taken as the environmental relative humidity change. If at least one group has an environmental relative humidity change ≤ a preset relative humidity change threshold, it is considered to meet the steady-state condition. Alternatively, from all environmental relative humidity data collected within a preset collection period, select several sets of environmental relative humidity data. Each set includes two non-adjacent environmental relative humidity values. Within the selected environmental relative humidity sets, the difference between the two environmental relative humidity values ​​is taken as the corresponding environmental relative humidity change. If at least one set of environmental relative humidity changes is ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. Implementation Plan 4: Within the preset collection period, for all collected ambient relative humidity values, calculate the difference between any two ambient relative humidity values. This difference is taken as the change in ambient relative humidity. Compare this change in ambient relative humidity with a preset threshold for change in ambient relative humidity. Count the number of comparison results. If the number of comparison results where the change in ambient relative humidity is less than or equal to the preset threshold for change in ambient relative humidity is greater than or equal to a preset threshold, then the steady-state condition is considered satisfied. Implementation Plan 5: Within the preset collection period, calculate the rate of change of any two ambient relative humidities. If at least two ambient relative humidities have a rate of change ΔRH ≤ a preset relative humidity change threshold, then the steady-state condition is considered satisfied. According to the collection order, the i-th ambient relative humidity (RH) i and the j-th ambient relative humidity RH j The formula for calculating the rate of change ΔRH is as follows, where i < j: △RH=|RH j -RH i | / RH i In the formula, || represents taking the absolute value.

4. The dehumidifier steady-state balance control method according to claim 3, characterized in that, In execution schemes 1-5, outliers in the collected ambient relative humidity are first removed, and then, in the remaining ambient relative humidity, the corresponding execution schemes 1-5 are executed.

5. The dehumidifier steady-state balance control method according to claim 1, characterized in that, The control may force a reduction in the dehumidifier's operating power, including shutting down the dehumidifier's semiconductor cooler and / or fan, or allowing the semiconductor cooler and / or fan to operate at a preset power, where the preset power is less than the rated power.

6. The dehumidifier steady-state balance control method according to claim 5, characterized in that, After receiving a command to forcibly reduce the dehumidifier's operating power, the power supply to the fan is cut off after a certain period of time, thereby turning off the fan.

7. The dehumidifier steady-state balance control method according to claim 1, characterized in that, The preset collection time is 0.5-2 hours, and the preset relative humidity change threshold is 1%-2%.

8. The dehumidifier steady-state balance control method according to claim 1, characterized in that, After forcibly reducing the dehumidifier's operating power, the system also includes implementing Option 2, where either Option 1 or Option 2 can be selected for execution: Option 2: In response to the dehumidifier shutdown command, the semiconductor cooler is turned off, and the fan operates at the preset power.

9. The dehumidifier steady-state balance control method according to claim 8, characterized in that, The specific implementation process, in which the fan runs for a shorter period than it is off within the same cycle, includes the following steps: After each first preset runtime T1, the fan stops running for a second preset runtime T2, and the following conditions are met: Or, T2-T1≥ , For the preset threshold, , For the preset threshold, .

10. The dehumidifier steady-state balance control method according to claim 9, characterized in that, T1 = 3 min, T2 = 30 min.

11. The dehumidifier steady-state balance control method according to claim 8, characterized in that, In Scheme 2, the preset operating power satisfies: This operating power enables the fan to generate airflow, and the airflow intensity is sufficient to move the air through the airflow channel where the ambient temperature sensor and the ambient relative humidity sensor are located. The ambient temperature sensor and the ambient relative humidity sensor are located inside the dehumidifier.

12. The dehumidifier steady-state balance control method according to claim 8, characterized in that, The preset operating power is lower than the operating power of the fan when the dehumidifier is in dehumidification mode.

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