Dehumidification capacity enhancement control method of dehumidifier

Abstract

The invention discloses a dehumidification capacity enhancement control method of a dehumidifier, the dehumidifier comprises a semiconductor cooler and a fan, the direction of air flow generated by the fan in a working state is opposite to the drainage direction of condensate water formed on the cold end of the semiconductor cooler, the drainage direction is consistent with the gravity direction, and when a dehumidification enhancement instruction is received, the semiconductor cooler is started to perform dehumidification. And controlling the fan to eliminate or weaken the drainage influence of the air flow generated by the fan on the condensate water. Condensate water can be drained in time, secondary evaporation of the condensate water due to the fact that the condensate water cannot be drained in time is avoided, and the dehumidification effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of dehumidifier control, and in particular to a dehumidification capacity enhancement control method for a dehumidifier. Background Art

[0002] Dehumidifiers based on semiconductor refrigerators are increasingly being used. For example, they can be used to dehumidify the storage space of energy storage batteries to maintain the ambient humidity of the storage space within the target humidity range. Dehumidifiers based on semiconductor refrigerators may have one or more of the following problems when used in practice: 1. The conductivity of the thermoelectric material of the semiconductor refrigerator is affected by the ambient temperature and humidity of the physical space where the dehumidifier is located, and the internal resistance of the semiconductor refrigerator will change with the fluctuation of ambient temperature and humidity. Taking the commonly used bismuth telluride (BeTi) thermoelectric material as an example, the internal resistance of the semiconductor refrigerator made of bismuth telluride thermoelectric material is positively correlated with the ambient temperature. When the ambient temperature decreases, the internal resistance of the semiconductor refrigerator will also decrease. Conversely, its internal resistance will increase. Assuming that a semiconductor refrigerator with 127 pairs of 1.4*1.4*1.7 standard BeTi thermoelectric material base grains is integrated, the ambient temperature of the dehumidifier containing the semiconductor refrigerator is -35 ℃ when it is started (in the storage scenario of the energy storage battery, the lower limit of the storage ambient temperature of the energy storage battery is generally -35 ℃ to -40 ℃). At this -35 ℃ ambient temperature, the internal resistance of the semiconductor refrigerator is 1.5 Ω (ohm). The common ambient temperature of dehumidifiers is generally 25 ℃. At this 25 ℃ ambient temperature, the internal resistance of the semiconductor refrigerator is 2.1 Ω. This means that if working under constant pressure, the working power of the semiconductor refrigerator corresponding to -35 ℃ (that is, the input power of the power supply to the semiconductor refrigerator) needs to be increased by about 29% compared with the working power corresponding to 25 ℃. In order to ensure that the semiconductor refrigerator can maintain the dehumidification function in a wide temperature range of -35 ℃ to 25 ℃, it is necessary to design the power of the power supply used to power the semiconductor refrigeration equipment with a margin, that is, to ensure that the input power of the power supply needs to be greater than the maximum working power of the semiconductor refrigeration equipment (in the wide temperature range of -35 ℃ to 25 ℃, the working power of the semiconductor refrigerator at -35 ℃ is the largest). Therefore, compared with the working power at 25 ℃, the power of the power supply needs to be increased by about 39% to meet the margin design requirements. Under such characteristics, if the semiconductor cooler works at a constant voltage (i.e., constant pressure), the working current and power of the semiconductor cooler will increase as the temperature decreases. Therefore, it is a problem to design the power of the power supply to the semiconductor cooler or control the input power to the semiconductor cooler (such as directly connecting to the mains). Although the power of the power supply is too large, it can meet the semiconductor power demand under the worst working conditions (the lowest ambient temperature, such as -35 ℃ to -40 ℃), but it will also cause power margin waste.

[0003] Therefore, from the perspective of power supply, the power design of the power supply used to power the semiconductor refrigerator needs to be reasonable. While meeting the input power required for the normal operation of the semiconductor refrigerator, it is also necessary to avoid power surplus waste. From the perspective of the semiconductor refrigerator or dehumidifier itself, the working power of the semiconductor refrigerator when it is started and the working power in the normal working state when it is working at the rated voltage need to be different to adapt to dehumidification in a wide temperature range.

[0004] 2. The dehumidification effect of the dehumidifier based on the semiconductor refrigerator depends on the relationship between the cold end surface temperature of the semiconductor refrigerator and the dew point temperature. If the cold end surface temperature is lower than the dew point temperature, the cold end surface can condense the water-containing air into liquid water to achieve dehumidification; otherwise, it cannot condense into water and cannot achieve dehumidification. The dew point temperature is related to the ambient temperature and humidity. Different ambient temperatures and humidities correspond to different dew point temperatures. Under certain ambient temperature and humidity, the dew point temperature is also certain.

[0005] In addition, the ambient temperature is greater than the dew point temperature, and there is a positive temperature difference between the ambient temperature and the dew point temperature. For example, when the ambient humidity is RH85% (also known as relative humidity), the ambient temperature is about 2-3°C greater than the dew point temperature. Similarly, when the ambient humidity is RH80%, RH70%, RH60%, and RH50%, the temperature difference between the ambient temperature and the dew point temperature is approximately 3-4°C, 5-6°C, 7-9°C, and 10-12°C, respectively. Due to the relationship between the cold end surface temperature, the dew point temperature, and the ambient temperature, it means that under some ambient temperatures and ambient humidity, in order to maintain the dehumidification effect of the semiconductor refrigerator, the cold end surface temperature needs to be below zero. However, when the cold end surface temperature is below zero, the cold end surface will frost and / or freeze, which will cause the condensed water to be unable to be discharged, and thus the dehumidification effect cannot be achieved.

[0006] Therefore, it is necessary to control the semiconductor refrigerator to enter the defrosting and deicing operation in time under appropriate conditions to avoid entering the defrosting and deicing operation before or after frosting and ice formation. Entering it later means that frost and ice have formed on the cold end surface of the semiconductor refrigerator. At this time, if the defrosting and deicing operation is entered, it will not be able to effectively defrost and deicer because the temperature of the cold end surface cannot reach the temperature required for defrosting. The frost or ice on the cold end surface cannot melt into water and drain away, and thus the dehumidification effect cannot be achieved. If it is entered before, the semiconductor refrigerator enters the defrosting and deicing operation too early, and the semiconductor refrigerator is turned off or runs at low power, which affects the dehumidification amount. That is, although dehumidification can be achieved, the dehumidification amount becomes lower and the dehumidification effect becomes worse.

[0007] 3. The dehumidifier will work within a range of upper and lower humidity limits. If the current ambient humidity is greater than the upper humidity limit, it means that the current ambient humidity exceeds the allowable humidity range and dehumidification is required, so the dehumidifier needs to be started. After the dehumidifier has been working for a period of time, the ambient humidity of the physical space where the dehumidifier is located will drop. When the ambient humidity drops below the lower humidity limit, the dehumidifier needs to be prohibited from further dehumidification to avoid further reduction of the ambient humidity below the lower humidity limit, that is, to avoid the ambient humidity falling below the template humidity lower limit set by the user. Therefore, the dehumidifier needs to be stopped. Finally, the dehumidification of the dehumidifier maintains the ambient humidity between the upper and lower humidity limits.

[0008] Under such working mechanism, the dehumidifier with semiconductor refrigerator has smaller cooling capacity than the dehumidifier without semiconductor refrigerator, and the semiconductor refrigerator is more affected by ambient temperature and humidity. During the dehumidification process, before the current ambient humidity drops to the lower limit of humidity, there will be a humidity equilibrium state, that is, the dehumidification amount of the dehumidifier is equal to the amount of moisture added to the environment by the outside. The dehumidifier is in continuous operation, but the ambient humidity cannot be further reduced, resulting in the inability to shut down the dehumidifier. This not only increases the energy consumption of the dehumidifier, but also affects the service life and reliability of the dehumidifier by continuous high-power operation, and ultimately reduces the performance of the dehumidifier and causes the dehumidification amount of the dehumidifier to decay.

[0009] 4. The dehumidifier needs to drain the condensed water, and at the same time, the fan needs to form wind flow to achieve ventilation and heat dissipation. Under certain structural limitations, the airflow formed by the fan and the flow direction of the condensed water are exactly opposite, which is equivalent to forming a negative pressure, which has a negative effect on drainage and cannot drain the condensed water in time. In addition to the technology that makes structural changes to such problems, the timeliness of drainage can also be achieved through regulation methods to reduce the negative impact of the additional dehumidification capacity of the dehumidifier due to the failure to drain water in time.

[0010] 5. As described in the previous point 3, when the ambient temperature reaches the lower limit of humidity, the dehumidifier will be forced to shut down, and the semiconductor cooler and fan in the dehumidifier will stop working. The sensor for collecting ambient temperature and ambient humidity is generally placed on the air duct of the fan. Therefore, when the fan stops working, no airflow can be formed, resulting in the collected ambient temperature and ambient humidity not being the real ambient temperature and ambient humidity, that is, there is a large error.

[0011] Therefore, it is necessary to ensure that the real ambient temperature and humidity can be accurately collected, and at the same time, the dehumidifier's original working mechanism of shutting down as needed can be effectively reduced or even not affected. Summary of the invention

[0012] In view of the deficiencies in the prior art, an object of the present invention is to provide a method for enhancing the dehumidification capacity control of a dehumidifier, which can solve the problem No. 4 pointed out in the background technology description.

[0013] The technical solution to achieve the purpose of the present invention is: a dehumidification capacity enhancement control method for a dehumidifier, the dehumidifier includes a semiconductor refrigerator and a fan, the airflow direction generated by the fan in the working state is opposite to the drainage direction of the condensed water formed on the cold end of the semiconductor refrigerator, and the drainage direction is consistent with the gravity direction. When the dehumidification enhancement instruction is received, the working state of the fan is controlled to eliminate or weaken the effect of the airflow generated by the fan on the drainage of condensed water.

[0014] Furthermore, the control of the working state of the fan includes: controlling the operating time ratio of opening and closing the fan, or controlling the operating power of the fan, or controlling and adjusting the installation position of the fan, or controlling and adjusting the direction angle of the fan, or controlling and adjusting the blowing direction of the fan, or controlling the air intake of the fan.

[0015] Further, the control of the operating time ratio of the fan on and off includes solution a, the control of the operating power of the fan includes solution b, the control of adjusting the installation position of the fan includes solution d, the control of adjusting the orientation angle of the fan includes solution e, the control of adjusting the blowing direction of the fan includes solution c or solution f, and the control of the air intake of the fan includes solution g, Solution a: In a cycle, the fan runs for a first duration a, then stops running for a second duration b, and , c is the preset ratio threshold, c>1, then the fan continues to enter the next cycle, and continues in sequence until the processing is completed. When the fan stops running, the semiconductor cooler keeps running; Solution b: The fan is operated at a preset power so that the airflow generated is not sufficient to flow to the cold end surface of the semiconductor refrigerator, or the airflow generated can flow to the cold end surface of the semiconductor refrigerator but is not sufficient to prevent the condensed water from being discharged under the action of gravity; Solution c: The fan rotates in the opposite direction so that the airflow generated by the fan becomes the same as the drainage direction; Solution d: Adjust the installation position of the fan so that the airflow generated by the fan blows to the designated area, and the designated area excludes the area where the cold end of the semiconductor refrigerator is located; Solution e: Adjust the direction angle of the fan so that the airflow generated by the fan is prohibited from blowing toward the cold end surface of the semiconductor refrigerator, or a part of the airflow is allowed to blow toward the cold end surface of the semiconductor refrigerator, and this part of the airflow is not enough to prevent the condensed water from being discharged under the action of gravity; Solution f: a flow guide assembly with a channel is provided, wherein a direction-adjusting member with a controllable angle is provided in the channel, the direction-adjusting member can be switched between a first angle and a second angle, and the direction-adjusting member is adjusted to be at the second angle. Wherein, when the direction-adjusting member is at a first angle, the airflow flows toward the surface of the semiconductor refrigerator, and when the direction-adjusting member is at a second angle, the airflow is restricted from flowing toward the surface of the semiconductor refrigerator; Solution g: Restrict the air intake of the fan so that the fan cannot generate airflow.

[0016] Furthermore, when the dehumidification enhancement instruction is received, in addition to controlling the working state of the fan, the working state of the semiconductor refrigerator is also controlled. Alternatively, when the dehumidification enhancement instruction is received, the working state of the semiconductor refrigerator is controlled to replace the step of controlling the working state of the fan, The control of the working state of the semiconductor refrigerator includes reversing the polarity of the cold end and the hot end of the semiconductor refrigerator by reversely connecting the power supply.

[0017] Furthermore, the cold end and the hot end of the semiconductor refrigerator share an air inlet. The direction of the air flow generated when the fan is in working state is the path direction formed by the air inlet, the semiconductor refrigerator and the position of the fan in sequence. The condensed water is discharged to the outside of the dehumidifier under the action of gravity.

[0018] Furthermore, it also includes that only when the dehumidifier is started and enters the dehumidification working state, and after the dehumidification enhancement instruction is received, the step of controlling the working state of the fan is executed to eliminate or weaken the influence of the fan airflow on the drainage of condensed water.

[0019] Furthermore, a=5 min, b=10 S, c≤10.

[0020] Furthermore, the dehumidifier is installed vertically along the direction from the fan to the air inlet, the air inlet is located at the lower end, the fan is located at the upper end, the direction of gravity is consistent with the direction of the path formed along the fan to the air inlet, the drainage direction is the same as the path direction, and the airflow direction is opposite to the path direction.

[0021] Further, the fan stops running, and in scheme g, it is sealed at the air inlet by a seal, or, it is sealed at the air inlet end of the fan by a seal, so as to prevent the airflow from flowing into the fan and thus achieve the goal of preventing the airflow from being generated.

[0022] Furthermore, when the dehumidifier enters the dehumidification working state, after detecting that condensed water is formed on the cold end surface of the semiconductor refrigerator, any one of Schemes a to g is executed.

[0023] Furthermore, the dehumidifier also includes a box body, the semiconductor refrigerator and the fan are installed in the inner cavity of the box body, the fan is located on one side of the semiconductor refrigerator, and the airflow formed by the fan in the working state can cover the cold end and the hot end of the semiconductor refrigerator. The air inlet is arranged on the box body, the air inlet end of the fan faces the air inlet, the air outlet end faces away from the air inlet and is located on the box body, and the air outlet end is communicated with the outside of the box body.

[0024] Furthermore, the dehumidifier also includes a drainage component, which is used to discharge the condensed water outside the dehumidifier.

[0025] Furthermore, the drainage assembly is installed at one end of the air inlet.

[0026] Furthermore, the drainage assembly includes a water collecting box and a water outlet. A groove for collecting condensed water is provided on one side of the water collecting box, and the water outlet is provided on the other side and connected to the groove so that the condensed water in the groove can be discharged to the outside through the water outlet.

[0027] Furthermore, the water collecting box is located between the semiconductor refrigerator and the air inlet, and at least a portion of the water outlet nozzle extends to the outside of the air inlet.

[0028] The beneficial effects of the present invention are as follows: the present invention can ensure timely discharge of condensed water, avoid secondary evaporation of condensed water due to failure to timely drain the water, and ensure the dehumidification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a flow chart of a preferred embodiment of the present invention; Figure 2 A schematic diagram showing a comparison of input power when starting the dehumidifier of the present invention and a conventional dehumidifier; Figure 3 This is one example of a schematic diagram showing a dehumidifier increasing from initial power to rated power; Figure 4 This is another example of a schematic diagram showing the change from initial power to rated power of a dehumidifier; Figure 5 This is another example of a schematic diagram showing a change in power of a dehumidifier from initial power to rated power; Figure 6 This is another example of a schematic diagram showing a dehumidifier changing from initial power to rated power; Figure 7 An exemplary flow chart for implementing step 2 in this embodiment; Figure 8 Another exemplary flow chart for implementing step 2 in this embodiment; Fig. 9 A schematic diagram of the structure of a dehumidifier including a semiconductor refrigerator and a fan is shown as an example; In the figure, 1-fan, 2-cold end, 3-semiconductor refrigerator, 4-hot end, 5-water collecting box, 6-water outlet, 7-air inlet. DETAILED DESCRIPTION

[0030] In order to solve the problems described in the background technology, the present invention is further described below in conjunction with the accompanying drawings and specific implementation schemes: like Figure 1-Figure 9 As shown, the present invention provides a dehumidification capacity enhancement control method of a dehumidifier, a control method of a dehumidifier comprising a semiconductor refrigerator 3 and a fan 1, and the control method of the dehumidifier comprises the following steps: Step 1: In response to the dehumidifier start-up instruction, the semiconductor refrigerator starts at a preset initial power, and increases the power to the target power by increasing the power to enter the dehumidification working state.

[0031] Specifically, in response to the dehumidifier start command, the semiconductor refrigerator 3 in the dehumidifier starts at the first preset input power and maintains the preset time. After operation, the semiconductor refrigerator 3 operates at the second preset input power, the first preset input power < the second preset input power, and the second preset input power represents the operating power of the semiconductor refrigerator 3 when it operates at the rated voltage, that is, the rated power. The first preset input power is the initial power, and the second preset input power is the target power, so that the dehumidifier starts at a low power and then runs at the rated power and performs the dehumidification action, realizing a power-protective slow start.

[0032] refer to Figure 2 , Figure 2 The normal start in the above refers to the start-up mode of the semiconductor refrigerator 3 in the existing dehumidifier, in which the input power is the largest at the start-up, and then after entering a stable state, the input power remains unchanged. The slow start refers to the start-up mode of the present invention, which starts at the first preset input power and lasts for a period of time. After that, the input power is increased to the second preset input power, and finally a stable state is entered, and the input power remains unchanged.

[0033] The semiconductor refrigerator 3 is started in a step-by-step manner and enters the dehumidification working state, and the input power jumps from a lower value to a higher value. Of course, the second scheme can also be adopted to start and also enter the dehumidification working state.

[0034] refer to Figure 3 , Second solution: The semiconductor refrigerator 3 in the dehumidifier is started at a preset initial power. After starting, the power is gradually increased by a preset increase amount on the basis of the initial power until it reaches the rated power. The semiconductor refrigerator 3 enters the dehumidification working state at the rated power state.

[0035] It should be noted that the "immediately" here means that after the dehumidifier is started at the preset initial power, the duration will not be extended and other processing items will not be inserted. Instead, after starting, the next processing item is to gradually increase the power.

[0036] In the second scheme, the power increase change can be a linear increase or a nonlinear increase. In the linear increase mode, there are multiple schemes. Among them, scheme 1: the power increase amount each time is , the preset increase It can be set according to the actual situation. For example, the increase ∆ is set to 1 W (watt), which means that the power corresponding to the current moment is 1 W (watt) higher than the power corresponding to the previous moment. The increase rate can be set to 5%, that is, the power corresponding to the current moment is the power corresponding to the previous moment plus the power corresponding to the previous moment * 5%. To gradually increase the power, the semiconductor refrigerator 3 runs at a low power at the moment of startup, and then gradually increases with time, linearly until it increases to the rated power, realizing a slowly increasing startup mode.

[0037] In Scheme 1, although the increase from the initial power to the rated power is linear, the increase between any two adjacent moments is the same, that is, the entire process is always increasing at the same rate of change, which is shown as a straight line in the p (power)-t (time) graph. In actual use, the period from the initial power to the rated power can include multiple different rates of change, so Scheme 2 is formed.

[0038] refer to Figure 4 , taking the linear spindle power increase with three different increments as an example, Scheme 2: In the process of increasing the initial power to the rated power, at least three increments with different values ​​appear, and these three increments with different values ​​are 1. 2. 3, and 1> 3> 2. For example, after the initial power is started, the increase is 1 increases to the next power P1, and the power P1 then increases by 2 increases to the next power, and the power at the next moment is increased by the power at the previous moment. 3. Similarly, in the third scheme, more or less (two) different increments can be used to increase the power, but the overall performance is a gradual increase in power until the rated power is reached. That is, in the third scheme, the power can increase faster at first, then increase slower, and finally increase faster. Or the power can be increased from a slower increase to a gradually faster increase.

[0039] In scheme 2, the execution order of the increments with different values ​​is arbitrary, for example, it can be 1. 2. 3, or you can 2. 1. 3, or in the order of 3. 2. 1, but each preset increment is executed at least once.

[0040] Both Scheme 1 and Scheme 2 increase in a linear manner. The difference from Scheme 1 is that Scheme 2 increases in multiple linear stages, while Scheme 1 increases in a linear manner. Of course, in actual use, a nonlinear increase method can also be used, gradually increasing from the initial power to the rated power, thus forming Scheme 3.

[0041] refer to Figure 5 , Scheme 3: Start from the initial power, and understand that based on the initial power, the power is continuously increased nonlinearly with a continuously changing increase until the rated power is reached. The change in the increase is as follows Figure 5 and Figure 6 The curved part of .

[0042] Figure 3-Figure 6 In the figure, the ordinate P represents input power and the abscissa t represents time. Figure 3 and Figure 4 The two schemes shown in the figure use digital power control to gradually increase the initial power to the rated power. Figure 5 and Figure 6 The scheme in the schematic diagram uses analog power control to achieve continuous increase of power to rated power. Figure 5 The increase of changes first slowly and then quickly. Figure 6 The increase of the amount of change is first fast and then slow. In an optional embodiment, the semiconductor refrigerator 3 is at a rated voltage The working power during operation is the second preset input power, and the voltage input to the semiconductor refrigerator 3 is the rated voltage. Therefore, the input voltage to the semiconductor refrigerator 3 under the first preset input power state is ,0< <1, represents the adjustment coefficient, which is a constant, and its value can be adjusted according to the actual situation, so as to achieve different input powers in the startup stage and the normal working state stage by adjusting the input voltage when the semiconductor refrigerator 3 is started and the input voltage after entering the normal working state. Therefore, in response to the semiconductor refrigerator 3 startup instruction, the input voltage supplied by the semiconductor refrigerator 3 is controlled to be , and continue for a preset time After operation, the input voltage of the semiconductor refrigerator 3 is adjusted to .

[0043] Set a preset duration The purpose is to use the voltage of the semiconductor refrigerator 3 as During the working period, the internal resistance of the semiconductor refrigerator 3 will increase due to the gradual increase in the temperature of the thermoelectric material. Maintain the voltage at , which ensures that the input voltage of semiconductor cooler 3 is Increase to When the first preset input power of the semiconductor refrigerator 3 is larger, the duration is longer. The bigger, the longer it lasts Maintains a positive correlation with the first preset input power.

[0044] In an optional embodiment, in order to adjust the preset time The preset time can be determined by detecting the working current of the semiconductor refrigerator 3 to adapt to different ambient temperature conditions. If the current working current is detected to be ≥ the preset current threshold, the time from the start of the dehumidifier to the current moment is taken as the preset time. , so that from the current moment, the semiconductor refrigerator 3 works according to the second preset input power and enters the dehumidification working state. The ambient temperature of the dehumidifier is different. After the dehumidifier is started, the speed of change of the working current of the semiconductor refrigerator 3 will be different. Therefore, by detecting the current change in real time, it can be adaptively and timely converted to the second preset input power to enter the dehumidification working state.

[0045] The current moment may be the first time when the working current is detected to be ≥ the preset current threshold, or the second, third, or subsequent time when the working current is detected to be ≥ the preset current threshold.

[0046] The ambient temperature here refers to the temperature of the space where the dehumidifier is located, that is, the peripheral temperature of the entire dehumidifier.

[0047] The lower the ambient temperature the dehumidifier needs to adapt to, the higher the adjustment coefficient The smaller the adjustment coefficient It is positively correlated with the ambient temperature of the dehumidifier. The lower the minimum ambient temperature that the dehumidifier needs to adapt to, the greater the maximum power required by the dehumidifier in theory.

[0048] By duration Maintaining a positive correlation and adjustment coefficient with the first preset input power Maintaining a positive correlation with the ambient temperature of the dehumidifier, when the semiconductor refrigerator 3 is powered on and started at the lowest ambient temperature, it prevents the semiconductor refrigerator 3 from being overloaded at the moment of power on, ensuring the reliable operation of the power supply to the semiconductor refrigerator 3.

[0049] When the dehumidifier is started, the semiconductor refrigerator 3 inside the dehumidifier is also started synchronously. Therefore, responding to the dehumidifier start instruction is also responding to the semiconductor refrigerator 3 start instruction.

[0050] For example, taking the application scenario where the dehumidifier needs to adapt to the ambient temperature of -35 ℃-70 ℃ as an example, the ambient temperature when the semiconductor refrigerator 3 is started is -35 ℃, which is also the lowest ambient temperature. The rated power of the semiconductor refrigerator 3 is 50-120 W (watts), and the input voltage of the semiconductor refrigerator 3 during the startup phase is 60% of the rated voltage, that is, =60%. After 2 min (minutes), the input voltage is adjusted to the rated voltage, that is, =2 min. This ensures that the semiconductor refrigerator 3 is started with a lower first preset input power, and then continues to work with a second preset input power. The first preset input power is approximately 60% of the maximum power, and the maximum power is also the theoretical maximum input power required corresponding to the lowest ambient temperature, thereby meeting the demand for low temperature and high power, and being applicable in a wide temperature range from the low temperature zone (-35 ℃) to the high temperature zone (70 ℃).

[0051] Exemplarily, taking into account the peak voltage and dehumidification capacity of the semiconductor refrigerator 3, For example, when the ambient temperature to be adapted is -35 ℃ -70 ℃, , and preferably 60%.

[0052] Through the processing of this step, it can be ensured that during the temperature change process of the dehumidifier from the first ambient temperature with a lower temperature at startup to the second ambient temperature with a higher temperature when entering the normal working state, there is a large temperature difference, resulting in a large difference in the input power of the semiconductor refrigerator 3 before and after the two states. This step controls the input power during the startup phase to be lower than the input power under the normal working state, which will not cause waste of the power supply surplus of the semiconductor refrigerator 3, and can also adapt to a wider temperature range. In addition, by setting the duration The slow start mode can avoid current overload, ensure the reliable operation of the power supply, and solve the problem No. 1 pointed out in the background technology.

[0053] When the semiconductor refrigerator 3 The working voltage (i.e. input voltage) starts and lasts for a certain period of time After that, the semiconductor refrigerator 3 starts to enter the normal working state. After the semiconductor refrigerator 3 has been in the normal working state for a period of time, in order to avoid the second problem described in the background technology, it is necessary to further control the semiconductor refrigerator 3, so as to determine the appropriate conditions to start the defrosting and deicing operation, so this embodiment proposes step 2. Of course, in actual use, it is also possible not to base on step 1, and any defrosting and deicing operation that meets the needs can be triggered, so as to execute step 2.

[0054] Step 2: After the semiconductor refrigerator enters the dehumidification working state, the following steps are performed cyclically until the dehumidifier defrosts and defrosts successfully: Get the current temperature of the cold end surface of the semiconductor cooler collected this time and the ambient temperature collected this time, Based on the collected ambient temperature, a preset temperature threshold corresponding to the current temperature of the semiconductor cooler surface collected this time is determined. Determine whether the current temperature of the cold end surface of the semiconductor refrigerator collected this time is less than the corresponding preset temperature threshold. If so, control the dehumidifier to perform defrosting and deicing actions. When the controlled dehumidifier performs the defrosting and deicing action for a first preset time, the surface temperature of the semiconductor refrigerator is collected again. Determine whether the temperature collected again on the surface of the semiconductor refrigerator 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°C < the preset defrosting end temperature threshold.

[0055] More specifically, the detected current ambient temperature is determined to be in a pre-divided temperature range, and the corresponding preset temperature threshold is determined according to the current ambient temperature. The same pre-divided temperature range corresponds to a preset temperature threshold, and different pre-divided temperature ranges correspond to different preset temperature thresholds, so that the preset temperature thresholds corresponding to each ambient temperature in the same pre-divided temperature range are the same, and the preset temperature thresholds corresponding to each ambient temperature in different pre-divided temperature ranges are different. According to the temperature range in which the current ambient temperature is located, the current temperature of the surface of the cold end 2 of the semiconductor refrigerator 3 is compared with the corresponding preset temperature threshold. According to the comparison result, whether the dehumidifier enters the defrosting and deicing operation is regulated. When in the defrosting and deicing operation state, the semiconductor refrigerator 3 of the dehumidifier stops working, that is, the power supply to the semiconductor refrigerator 3 is turned off.

[0056] This step is to determine whether the dehumidifier enters the defrosting and deicing operation according to the pre-divided temperature range of the current ambient temperature and the current temperature of the surface of the semiconductor refrigerator 3 after the semiconductor refrigerator 3 enters the dehumidification working state. When it is in the defrosting and deicing operation state, the semiconductor refrigerator 3 of the dehumidifier stops working, so that the dew point temperature corresponding to the current ambient temperature can be continuously approached by dividing multiple temperature ranges, and the dew point temperature corresponding to the current ambient temperature can be found. Then, the surface temperature of the cold end 2 of the semiconductor refrigerator 3 is compared with the preset temperature threshold value, which is based on the principle that the semiconductor refrigerator 3 uses the temperature difference between the surface temperature of the cold end 2 and the ambient temperature to achieve condensation. Therefore, different temperature ranges need to set different temperature preset thresholds, and the corresponding preset temperature thresholds decrease in sequence according to the order of the temperature range segments divided from high to low.

[0057] Among them, the pre-divided temperature range segments include at least two temperature range segments, and the temperature range segments that can be divided can be based on the defrosting temperature that the cold end 2 of the semiconductor refrigerator 3 can reach after refrigeration and cover the entire use environment temperature range. For example, with 1°C as the dividing point, ≥1°C is the first temperature range segment, <1°C is the second temperature range segment, the first temperature range segment corresponds to a preset temperature threshold, for example, set to -10°C, and the second temperature range segment corresponds to another preset temperature threshold, for example, set to -12°C. In actual use, more temperature range segments can be set, for example, ≥1°C is the first temperature range segment, [8°C, 1°C) is the second temperature range segment, and ≤8°C is the third temperature range segment. For another example, three temperature dividing points are set to form four temperature range segments (first temperature range segment-fourth temperature range segment).

[0058] After the defrosting and deicing operation is completed, the power supply of the semiconductor refrigerator 3 is restored, that is, the semiconductor refrigerator 3 is restarted and keeps working, so that the dehumidifier continues to perform the dehumidification work.

[0059] More specifically, the current ambient temperature and the current temperature of the surface of the cold end 2 of the semiconductor refrigerator 3 are compared with a plurality of preset temperature thresholds, and according to the comparison results, whether the dehumidifier enters the defrosting and deicing operation is regulated. When in the defrosting and deicing operation state, the semiconductor refrigerator 3 of the dehumidifier stops working, that is, the power supply to the semiconductor refrigerator 3 is turned off. After the defrosting and deicing operation is completed, the power supply to the semiconductor refrigerator 3 is restored, that is, the semiconductor refrigerator 3 is restarted and keeps working, so that the dehumidifier continues to perform the dehumidification work. For the specific implementation process, refer to Figure 7 Taking setting two temperature dividing points to form three temperature range segments as an example, the specific implementation steps include: Step 21: Collect the current ambient temperature and the current temperature of the cold end 2 surface of the semiconductor refrigerator 3 .

[0060] The current ambient temperature and the current temperature of the surface of the cold end 2 can be collected respectively by installing the first ambient temperature sensor and the second ambient temperature sensor in the dehumidifier. In order to ensure the accuracy of the collection, the first ambient temperature sensor and the second ambient temperature sensor are installed in the corresponding 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 far away from the surface of the cold end 2. However, the first ambient temperature sensor and the second ambient temperature sensor are both located in the airflow channel where the fan 1 acts, that is, located on the path of the airflow. Since the installation positions of the first ambient temperature sensor and the second ambient temperature sensor are structural improvements, their specific installation positions are not limited in this embodiment, so they are not repeated here.

[0061] Step 22: Determine the current ambient temperature In this example, the temperature range is divided into three segments: 1°C and 8°C. Falling into the first temperature range, that is , then execute step 23, otherwise, it means that the current ambient temperature falls into the other two temperature ranges. Specifically, if ≤ , then it falls into the second temperature range, then execute step 24; if , it falls into the third temperature range, and step 25 is executed.

[0062] In this example, 1℃, 8 ℃. Of course, other values ​​can also be used in actual use. As the first preset temperature demarcation point, Second preset temperature dividing point. Of course, more temperature dividing points may be set, for example, including a third preset temperature dividing point, a fourth preset temperature dividing point, ...

[0063] Step 23: Determine the current temperature of the cold end 2 surface With the first preset temperature threshold The size relationship, ,like , the power supply of the semiconductor refrigerator 3 is turned off, so that the semiconductor refrigerator 3 stops working, thereby starting the defrosting and defrosting operation, and after the defrosting and defrosting operation is completed, execute step 26. Otherwise, that is, if , then directly proceed to step 26.

[0064] In this step, the power supply of the semiconductor refrigerator 3 is turned off, that is, the power of the semiconductor refrigerator 3 is cut off. In this case, the heat of the hot end 4 of the semiconductor refrigerator 3 will be transferred to the cold end 2 of the semiconductor refrigerator 3, so that the frost or ice layer on the surface of the cold end 2 will melt into water, and the water will be drained away.

[0065] In order to better drain the melted water, the fan 1 is also started when the semiconductor refrigerator 3 is in a power-off state, that is, in a defrosting and de-icing state. The fan 1 is started and an airflow is formed after the fan 1 starts working. Under the strong action of the airflow, the melting of frost or ice on the surface of the cold end 2 can be accelerated, and the water can be drained away.

[0066] In an alternative embodiment, -10 ℃. Of course, in actual use, other temperature values ​​can also be used, for example, -8 ℃.

[0067] Step 24: Determine the current temperature of the cold end 2 surface With the second preset temperature threshold The size relationship, ,like , the power supply of the semiconductor refrigerator 3 is turned off, so that the semiconductor refrigerator 3 stops working, thereby starting the defrosting and defrosting operation, and after the defrosting and defrosting operation is completed, execute step 26. Otherwise, that is, if , then directly proceed to step 26.

[0068] In an alternative embodiment, -12 ℃. Of course, in actual use, other temperature values ​​can also be used, for example, -14 ℃.

[0069] Step 25: Determine the current temperature of the cold end 2 surface With the third preset temperature threshold The size relationship, ,like , the power supply of the semiconductor refrigerator 3 is turned off, so that the semiconductor refrigerator 3 stops working, thereby starting the defrosting and defrosting operation, and after the defrosting and defrosting operation is completed, execute step 26. Otherwise, that is, if , then directly proceed to step 26.

[0070] Step 26: Determine the current temperature of the cold end 2 surface With the fourth preset temperature threshold The size relationship, ,and ,like , then jump to step 21, otherwise, that is, if , the defrosting and deicing operation is terminated, and the power supply to the semiconductor refrigerator 3 is restored, so that the semiconductor refrigerator 3 returns to a normal working state, and after the normal working state is restored, that is, the dehumidifier continues to enter the dehumidification working state, and jumps to step 21 again.

[0071] In the above example, the pre-divided temperature range segment is determined based on the collected ambient temperature, thereby determining the preset temperature threshold corresponding to the temperature range segment. In actual use, it is also possible not to determine the preset temperature threshold by the pre-divided temperature range segment, but to use a preset algorithm to determine the preset temperature threshold. The preset algorithm follows the mapping relationship principle between the current ambient temperature and the preset temperature threshold. The mapping relationship includes: 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 certain mathematical formula, the corresponding preset temperature threshold can be determined for each current ambient temperature.

[0072] refer to Figure 7 , Figure 7 This is an exemplary flow chart for implementing step 2. The end in the figure can be to exit the process of determining whether to perform the defrosting and deicing operation after obtaining the end instruction, or it can be other processing, which is not limited. The defrosting in the figure includes defrosting and deicing, that is, it represents the defrosting and deicing operation, and the refrigerator refers to the semiconductor refrigerator 3. Figure 7 In the example given, 1 ℃, 8 ℃, -10 ℃, -12 ℃, -15 ℃, 5 ℃.

[0073] In this example, the temperature order can be determined according to preset rules, including the temperature order determined from high to low temperatures, or the temperature order determined from low to high temperatures, or starting from any temperature dividing point, sequentially or randomly determining the next temperature dividing point until the last temperature dividing point is determined, thereby determining the temperature order.

[0074] refer to Figure 8 , which illustrates the example of setting three temperature dividing points to form four temperature range segments. The specific implementation steps are similar to the above-mentioned process of setting two temperature dividing points to form three temperature range segments, so they are not repeated here.

[0075] In the above two examples, the current ambient temperature collected determines which pre-divided temperature range segment it is in, which can be determined by comparing the current ambient temperature with the preset temperature dividing point. At least one temperature dividing point is set, so that the temperature range segment can be divided into at least two. The next temperature dividing point can be determined sequentially or randomly according to the temperature from high to low, or from low to high, or starting from any temperature dividing point, until the last temperature dividing point is determined, thereby determining the temperature sequence and comparing the current ambient temperature with the temperature dividing points respectively. Figure 7 and Figure 8 The illustrated examples are all based on a comparison of temperatures from high to low, thereby determining the temperature range in which the current ambient temperature is located.

[0076] This step is to prevent the cold end 2 of the semiconductor refrigerator 3 from frosting and / or icing. The semiconductor refrigerator 3 realizes refrigeration based on the temperature difference, that is, the temperature difference is formed at the cold end 2 and the hot end 4 with different temperatures. When the temperature of the hot end 4 of the semiconductor refrigerator 3 decreases, the temperature of the cold end 2 of the semiconductor refrigerator 3 will also decrease. When the ambient temperature is low, the temperature of the cold air surface will be lower than zero degrees, causing the condensed water of the condensed air to frost or freeze on the surface of the cold end 2, so that the condensed water cannot be drained away, and the humidity cannot be adjusted. Therefore, it is necessary to perform defrosting and deicing operations. In order not to start the defrosting and deicing operation too early or too late, it is critical to set the defrosting temperature point used to determine whether to start the defrosting and deicing operation. If it is set too high, it will lead to premature entry into the defrosting and deicing operation. Since defrosting and deicing depends on the semiconductor refrigerator 3 being powered off or running at low voltage (i.e., low power consumption), it will affect the dehumidification amount of the semiconductor refrigerator 3.

[0077] In this step, the segmented adaptive control technology is used to solve the problem of premature or late defrosting and defrosting caused by inaccurate defrosting temperature setting. To estimate the ambient temperature when frost or ice begins to form on the surface of the cold end 2 For example, suppose the temperature difference between the surface temperature of cold end 2 and the ambient temperature is When the temperature is 15℃ and frost or ice begins to form, the surface temperature of the cold end 2 is -3℃, then the ambient temperature 12 ℃. This means that if the current ambient temperature is ≤ 12 ℃, the surface of the cold end 2 of the semiconductor refrigerator 3 will be frosted or iced. In other words, the current ambient temperature < When the current ambient temperature is different, the temperature point at which frost or ice can form on the surface of the cold end 2 is also different. This temperature point is also the defrost temperature point that determines whether to start the defrosting and defrosting operation.

[0078] In this step, two preset ambient temperature thresholds (a first preset ambient temperature threshold and a second preset ambient temperature threshold) are set with decreasing values ​​in sequence, and the two preset ambient temperature thresholds are relatively close. Relatively close means that the difference between the two preset ambient temperature thresholds is within the preset threshold range. The preset threshold range can be set to a relatively small value as needed. For example, Figure 2 In the example, the difference between the first preset ambient temperature threshold (1°C) and the second preset ambient temperature threshold (8°C) is 3, so the preset threshold can be set to 3. By setting two preset ambient temperature thresholds that decrease in value, and then comparing the current measured ambient temperature with the two preset ambient temperature thresholds step by step (i.e., segmented). And, in the first comparison (i.e., comparison and 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, and in order to avoid early defrosting and deicing operation, a second comparison is required (i.e., comparison and Size), since the second preset ambient temperature threshold of the second comparison is smaller, and the second preset ambient temperature threshold is already small (such as 8 ℃), if the dehumidifier is running for dehumidification, in a very short time (more than ten seconds in the test), the surface temperature of the cold end 2 of the semiconductor refrigerator 3 will quickly drop below zero (the test measurement dropped to -5 ℃), which will cause the semiconductor refrigerator 3 to have no time to condense or freeze, and will trigger the defrosting and defrosting operation logic, thereby causing the refrigerator to be powered off or run at low power consumption (defrosting and defrosting requires the refrigerator to be powered off or run at low power consumption). After the refrigerator is powered off, the surface temperature of its cold end 2 recovers and then starts to dehumidify, and then it will quickly enter the defrosting and defrosting operation, causing the dehumidifier to run frequently between dehumidification and defrosting and defrosting. The real effective dehumidification time is extremely short, and dehumidification cannot be effectively performed. Although this can ensure that there will be no frost or ice, the dehumidification effect is almost negligible.

[0079] When the current ambient temperature is greater than the second preset ambient temperature threshold, it means that the ambient temperature at this time may be close to the defrosting temperature point. In order to avoid entering the defrosting and deicing operation in advance and improve the accuracy, it is also necessary to compare the current cold end 2 surface temperature with the preset temperature threshold, that is, to compare and If the value is met, it means that the current conditions are suitable for starting defrosting and deicing operations. The same logic is followed by other numerical comparisons. By comparing the value with the preset ambient temperature threshold multiple times and combining the result of each comparison with the preset cold end surface temperature threshold, the current temperature close to the defrosting temperature point can be found more accurately (ideally, the two are equal), thereby effectively avoiding entering the defrosting and deicing operation too early (in advance) or too late (delayed).

[0080] The preset ambient temperature threshold and the preset cold end surface temperature threshold can be determined based on experience or through experiments / tests simulating the actual environment. The closer the preset thresholds are to the actual situation, the more accurate the judgment of this step is, that is, the closer it is to the defrosting temperature point to start the defrosting and deicing operation. In addition, more preset ambient temperature thresholds and corresponding preset cold end surface temperature thresholds can be set, so that more segmented comparisons can be made to get closer to the defrosting temperature point and enter the defrosting and deicing operation more accurately.

[0081] Through the processing of this step, it is possible to effectively avoid entering the defrosting and deicing operation too early or too late, and it is possible to avoid the dehumidifier frequently switching between dehumidification and defrosting and deicing, thereby effectively avoiding frost or ice on the surface of the semiconductor refrigerator 3, and it is possible to effectively maintain the dehumidification operation time and ensure the dehumidification effect. Therefore, the processing of step 2 can solve the problem about point 2 as described in the background technology.

[0082] In addition, through the combined processing of step 1 and step 2, the input power during the startup phase and the normal working phase is taken into account, avoiding the waste of the input power margin of the power supply and being able to avoid current overload. And after entering the normal dehumidification working phase, it is also possible to well avoid frost or ice on the surface of the cold end 2.

[0083] Step 3: When the dehumidifier is in the dehumidification working state, that is, the semiconductor refrigerator 3 of the dehumidifier is in the non-defrosting and deicing working state, in order to avoid the dehumidifier being unable to further reduce the relative humidity of the environment, the dehumidification work continues to be performed to avoid the dehumidifier being unable to shut down, thereby reducing the energy consumption of the dehumidifier, and the dehumidifier needs to be forced to shut down or operate at low power consumption. In view of such a situation, the dehumidifier needs to enter the steady-state forced shutdown mode. The steady-state forced shutdown mode can avoid the dehumidifier being unable to shut down according to the normal dehumidification logic, and realize the forced change of the working state of the dehumidifier, including shutting down the dehumidifier or reducing the working power of the dehumidifier. Shutting down the dehumidifier includes forcibly shutting down the semiconductor refrigerator 3 and / or shutting down the fan 1. Reducing the working power of the dehumidifier includes running the semiconductor refrigerator 3 and / or the fan 1 at low power consumption. The so-called running at low power consumption is to run at a preset power. The preset power can be set to a smaller value as needed, and the preset power is less than the rated power. Shutting down the semiconductor refrigerator 3 and the fan 1 can be achieved by cutting off the power supply to them, thereby stopping the dehumidification work and avoiding energy waste.

[0084] Under normal circumstances, the dehumidification of the dehumidifier mainly adjusts the humidity of the space where the dehumidifier is located to control it within the target humidity upper and lower limit thresholds. When the humidity exceeds the upper limit threshold, the dehumidifier is started for dehumidification; as the dehumidification proceeds, the humidity decreases. When the humidity drops below the lower limit threshold, the dehumidifier needs to stop working, so that the humidity is maintained between the upper and lower limit thresholds. The cooling capacity of the semiconductor refrigerator 3 is relatively small, and it is greatly affected by the ambient temperature and humidity. During the dehumidification process, after the dehumidifier enters the dehumidification adjustment equilibrium state, it cannot further reduce the humidity of the space, but the humidity of the control unit at this time has not reached the target humidity lower limit threshold. Therefore, if the control method of the traditional dehumidifier is followed, the dehumidifier still needs to keep working, but the work of the dehumidifier at this time is a kind of "invalid" work. If the dehumidifier still maintains the highest power or rated power or higher power, it will affect the working life and reliability of the dehumidifier, and eventually the dehumidification capacity of the dehumidifier will decay. Therefore, the dehumidifier needs to be forced to shut down in such a situation, where the forced shutdown includes turning off the dehumidifier, or the dehumidifier is operated at low power consumption, that is, operating at a lower working power. Shutting down the dehumidifier includes shutting down the semiconductor refrigerator 3 and / or the fan 1 in the dehumidifier.

[0085] Exemplarily, whether to enter the steady-state forced shutdown mode can be determined 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, then the dehumidifier enters the steady-state forced shutdown mode, wherein RH represents the relative humidity of the current environment, that is, the ambient relative humidity of the space where the dehumidifier is located, and RH0 represents the target humidity lower limit threshold, which is a preset constant.

[0086] Of course, in actual use, other conditions may also be used to determine whether to enter the problem forced shutdown mode. This embodiment does not limit this, and it only needs to be able to trigger entering the steady-state forced shutdown mode.

[0087] Steady-state forced shutdown mode: within the preset collection time, if the relative humidity change of the environment is ≤ the preset relative humidity change threshold, the dehumidifier's working power is forcibly reduced. The forced reduction of the dehumidifier's working power includes forcibly reducing the dehumidifier's working power to 0 so that the dehumidifier is in the shutdown state. Shutting down the dehumidifier includes shutting down the semiconductor refrigerator 3 and / or shutting down the fan 1. The forced reduction of the dehumidifier's working power may also include reducing the dehumidifier to work at a lower working power.

[0088] In this step, by comparing the current relative humidity of the real-time acquisition environment with the preset humidity lower limit value and the difference, it is determined whether to force the dehumidifier to reduce its working power, including forcibly reducing the working power of the dehumidifier or reducing the dehumidifier to work at a lower working power, according to whether the comparison result and the difference are less than or equal to a preset threshold. Shutting down the dehumidifier includes shutting down the semiconductor refrigerator 3 and / or the fan 1, and the shutdown can be achieved by cutting off the power supply to the semiconductor refrigerator 3 and the fan 1.

[0089] In an optional embodiment, after receiving the instruction to forcibly reduce the working power of the dehumidifier, the power supply to the fan 1 is cut off after a period of time.

[0090] More specifically, if 0<RH-RH0≤preset relative humidity threshold, the dehumidifier enters steady-state forced shutdown mode, wherein RH represents the relative humidity of the current environment, that is, the relative humidity of the environment in 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 the preset acquisition time, if the relative humidity change of the environment is ≤ the preset relative humidity change threshold, the working power of the dehumidifier is forced to be reduced. The forced reduction of the working power of the dehumidifier includes forcibly reducing the working power of the dehumidifier, that is, reducing the working power of the dehumidifier to 0, so that the dehumidifier is in the off state. Shutting down the dehumidifier includes shutting down the semiconductor refrigerator 3 and / or shutting down the fan 1. The forced reduction of the working power of the dehumidifier may also include reducing the dehumidifier to work at a smaller working power of >0. The specific implementation process includes: Step 31: Collect the relative humidity of the environment and obtain the current relative humidity of the environment.

[0091] The ambient relative humidity can be collected according to a preset sampling frequency, for example, the abnormal ambient relative humidity can be collected every 1 S (second) or 0.5 min (minute), so that the ambient relative humidity can be collected in real time.

[0092] Step 32: Determine whether the current environment relative humidity is greater than the target humidity lower limit threshold, and whether the current environment relative humidity - the target humidity lower limit threshold ≤ the preset relative humidity threshold. If so, execute step 33.

[0093] If not, that is, the current ambient relative humidity is ≤ the target humidity lower limit threshold, and / or the difference between the current ambient relative humidity and the target humidity lower limit threshold is large and exceeds the preset relative humidity threshold, then the working power of the dehumidifier can be forced to reduce or other processing can be performed, wherein shutting down the dehumidifier includes shutting down the semiconductor refrigerator 3 and / or the fan 1, and shutting down the fan 1 can be delayed for a preset time before shutting down.

[0094] In this step, if the collected current environmental relative humidity is lower than the preset humidity lower limit threshold, it means that the current environmental relative humidity is out of (lower than) the allowed target humidity range, and the target humidity range is between the preset template humidity lower limit threshold (such as RH20%) and the preset target humidity upper limit threshold (such as RH80%). The dehumidification purpose of the dehumidifier is to maintain the environmental relative humidity of the physical space within the desired target humidity range. Too high or too low does not meet the requirements. Therefore, once it is detected that it is lower than the target humidity lower limit threshold, it is necessary to immediately shut down the power supply of the refrigerator, and cut off the power supply of fan 1 synchronously or after a delay, so as to stop the refrigerator and / or fan 1 from working.

[0095] Likewise, step 32 is merely an example of whether it is necessary to trigger the steady-state forced shutdown mode, and is not essential. Step 32 may be skipped and step 33 may be entered directly.

[0096] Step 33: After the dehumidifier enters the steady-state forced shutdown mode, at least two environmental relative humidities corresponding to different moments are collected within the preset collection time, that is, the corresponding environmental relative humidity is collected once at least at two different moments within the preset collection time, so as to obtain at least two environmental relative humidities. If the environmental relative humidity change is determined based on the environmental relative humidity collected each time among all the environmental relative humidities collected within the preset collection time, if the change in environmental relative humidity is ≤ the preset relative humidity change threshold, it indicates that the working power of the dehumidifier needs to be forced to be reduced. Similarly, shutting down the dehumidifier includes shutting down the semiconductor refrigerator 3 and / or the fan 1, and shutting down the fan 1 can be delayed for a preset time. If it is greater than or equal to the preset humidity change threshold, you can continue to wait or do other processing, which is not limited by the present invention.

[0097] In step 3, any one of Examples 1 to 5 may be used to determine whether a steady-state condition is satisfied: a change in ambient relative humidity ≤ a preset relative humidity change threshold.

[0098] Example 1: Among all the collected ambient relative humidity within the preset collection time, if the difference between the maximum ambient relative humidity and the minimum ambient relative humidity is taken as the ambient relative humidity change, if the ambient relative humidity change is ≤ the preset relative humidity change threshold, it is deemed that the steady-state condition is met, and the dehumidifier's working power is forced to be reduced.

[0099] Example 2: Among all the collected ambient relative humidities within the preset collection time, several groups of ambient relative humidities are selected in the collection order, each group includes two adjacent ambient relative humidities, and in the selected ambient relative humidities of the same group, the difference between the adjacent ambient relative humidities is used as the ambient relative humidity change corresponding to each group. If there is at least one group whose corresponding ambient relative humidity change is ≤ the preset relative humidity change threshold, it is deemed that the steady-state condition is met, and the working power of the dehumidifier is forced to be reduced.

[0100] Example 3: Among all the collected ambient relative humidities within a preset collection time, several groups of ambient relative humidities are selected in the collection order, each group includes three or more adjacent ambient relative humidities, and the difference between the maximum ambient relative humidity and the minimum ambient relative humidity in the same group of ambient relative humidities is taken as the ambient relative humidity change. If there is at least one group whose corresponding ambient relative humidity change is ≤ the preset relative humidity change threshold, it is deemed that the steady-state condition is met.

[0101] Alternatively, among all the collected ambient relative humidities within a preset collection time, several groups of ambient relative humidities are selected, each group including two non-adjacent ambient relative humidities. In the selected ambient relative humidities of the same group, the difference between the two ambient relative humidities is used as the corresponding ambient relative humidity change. If there is at least one group of corresponding ambient relative humidity changes ≤ the preset relative humidity change threshold, it is deemed that the steady-state condition is met.

[0102] Example 4: Among all the collected ambient relative humidities within the preset collection time, the difference between any two ambient relative humidities is taken as the ambient relative humidity change, and the ambient relative humidity change is compared with the preset relative humidity change threshold, and the number of size comparison results is counted. In the number of statistical size comparison results, if the ambient relative humidity change is ≤ the statistical number of the preset relative humidity change threshold, if the statistical number is ≥ the preset number threshold, it is deemed that the steady-state condition is met.

[0103] Example 5: Calculate the change rate of any two ambient relative humidities among all the ambient relative humidities collected within the preset collection time. If there are at least two ambient relative humidities with a change rate △RH ≤ the preset relative humidity change threshold, the steady-state condition is considered to be met. According to the collection order, the i-th environment relative humidity RH i and the jth ambient relative humidity RHj The calculation formula for the rate of change of △RH is as follows, i<j: △RH=|RH j -RH i | / RH i In the formula, || means taking the absolute value.

[0104] Example 6: After removing the outliers, process according to any of Examples 1-5. Outliers may be noise collected, or abnormalities caused by other reasons. For example, among all the collected relative humidity values ​​within the preset collection time, one or more values ​​of the relative humidity values ​​that are obviously too large or too small appear. These outliers cannot interfere with the normal relative humidity changes.

[0105] In the above example, each collected ambient relative humidity corresponds to a moment. Therefore, the difference between the ambient relative humidities in time sequence can be compared with the preset relative humidity change threshold to make a judgment. For example, the ambient relative humidity corresponding to a certain moment is selected, and then after a preset time, the ambient relative humidity corresponding to another moment is selected. The difference or quotient of the two ambient relative humidities is taken and then compared with the preset humidity change threshold, and whether the steady-state condition is met is determined based on the comparison result.

[0106] In actual use, other preset rules can also be used to determine whether the change in ambient relative humidity is ≤ the preset relative humidity change threshold. For example, by converting the difference between the two ambient relative humidities into a quotient, which is only a mathematical conversion, the essence is the same, and the effect is also the same. In this way, whether the change in ambient relative humidity is within a very small range can be judged based on actual circumstances, so the specific circumstances cannot be exhausted.

[0107] Among them, when the change of ambient relative humidity (that is, the change of maximum ambient relative humidity and minimum ambient relative humidity) is less than a certain value (that is, the preset humidity change threshold, for example, 1%-2%) within a period of time (that is, the preset collection time, for example, 0.5-2 h (hours)), it is considered that the dehumidifier has entered a steady-state equilibrium working state. Even if the dehumidifier continues to maintain dehumidification work, it cannot further reduce the ambient relative humidity. This is equivalent to the current ambient relative humidity having reached the lower humidity threshold. Therefore, it is also necessary to force the dehumidifier to reduce its working power.

[0108] The preset collection duration can be adjusted according to the actual situation. For example, this example can be set to 0.5-2 h (hours), which should not be set too large or too small. Similarly, the preset relative humidity change threshold can also be adjusted according to the actual situation. For example, this example can be set to 1%-2%, which should not be set too large or too small. Within the duration of 0.5-2 h, if the relative humidity of the environment does not change much, for example, the humidity change is ≤1%-2%, it can be considered that the relative humidity of the environment can no longer continue to decrease, so it is necessary to shut down the dehumidifier.

[0109] The processing in this step can effectively avoid the problem of the dehumidifier continuing to work due to the inability to further reduce the relative humidity of the environment, while maintaining the dehumidification amount within the target dehumidification range to meet the dehumidification effect of the dehumidifier. It not only provides stability and reliability of the dehumidifier, but also saves electricity consumption.

[0110] It should be noted that this step can be implemented independently, and does not necessarily need to be implemented after executing step 1 and step 2. Of course, it can also be implemented after executing step 2 or during the execution of step 2.

[0111] In an optional embodiment, in this step, when the dehumidifier is forced to reduce the working power, the semiconductor refrigerator 3 and the fan 1 both stop working. In this state of the dehumidifier, the ambient temperature sensor and the ambient relative humidity sensor in the dehumidifier are located on the airflow duct where the fan 1 acts. In the absence of airflow, the temperature and humidity collected by the ambient temperature sensor and the ambient relative humidity sensor are inaccurate, that is, there is a large deviation from the actual ambient temperature and ambient relative humidity. For this reason, it is necessary to provide a sampling method with sampling accuracy. In order to avoid inaccurate temperature and humidity data collected after the dehumidifier is forced to reduce the working power, Scheme 1 or Scheme 2 can be adopted.

[0112] Solution 1: In response to the dehumidifier shutdown command, the semiconductor refrigerator 3 is turned off, so that the semiconductor refrigerator 3 stops working, and the fan 1 stops running for a second preset running time T2 after running for a first preset running time T1, and , is the preset threshold, is a constant, That is, in one cycle, the fan 1 runs for the first preset running time T1, and the fan 1 stops running for the second preset running time T2. As a result, the duration of the fan 1 stopping running is much longer than the duration of the fan 1 working. For example, after the fan 1 is turned on and running for 3 minutes, the fan 1 stops running for 30 minutes; then, the fan 1 continues to be turned on and running for 3 minutes, and the fan 1 stops running for 30 minutes, and the process is repeated alternately until the end. During the alternating operation and stopping of the fan 1, the semiconductor refrigerator 3 is always in a closed state, that is, in a stopped working state.

[0113] Exemplarily, T1 and T2 may also take other values, for example, T1=2 min, T2=35 min, or other values. Since it is impossible to list all specific values ​​of T1 and T2, they are not described here.

[0114] When the fan 1 is turned on, the airflow generated by the fan 1 flows through the airflow channel where the ambient temperature sensor and the ambient relative humidity sensor are located, so that the real ambient temperature and ambient relative humidity can be collected. In addition, during most of the time period, the fan 1 is in a stopped state, so that on the premise of being able to collect the real ambient temperature and ambient relative humidity, the mechanical loss and energy consumption of the fan 1 caused by the air volume rotation caused by the start of the fan 1 can be reduced, thereby extending the service life of the fan 1.

[0115] Solution 2: In response to the dehumidifier shutdown command, the semiconductor refrigerator 3 is turned off, so that the semiconductor refrigerator 3 stops working, and the fan 1 operates at a preset working power. The preset working power is small, but it can generate airflow, and the airflow intensity is sufficient to flow air through the airflow channel. The preset working power can be set as needed, which is lower than the working power of the fan 1 when the dehumidifier is in the dehumidification working state, that is, it operates at low power consumption. By reducing the working power of the fan 1, energy consumption can be reduced, and the airflow can be allowed to circulate through the ambient temperature sensor and the ambient relative humidity sensor in real time, so that the ambient temperature and ambient relative humidity can be accurately collected in real time.

[0116] refer to Fig. 9 In an optional embodiment, in any of the above steps, when the dehumidifier is started and enters the dehumidification working state, the dehumidifier will dehumidify, so that the dehumidifier will form condensed water, that is, condensed water is formed on the surface of the cold end 2 of the semiconductor refrigerator 3. In order to ensure the dehumidification effect, the condensed water needs to be discharged in time.

[0117] In addition, in order to better ensure the dehumidification effect, the dehumidifier includes a box body, and a semiconductor refrigerator 3 and a fan 1 installed in the inner cavity of the box body. The fan 1 is located on one side of the semiconductor refrigerator 3. The airflow formed by the fan 1 in the working state can cover the cold end 2 and the hot end 4 of the semiconductor refrigerator 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.

[0118] The box body is provided with an air inlet 7. For example, the fan 1 is installed at one end of the box body, and the air inlet 7 is provided at the other end of the box body relative to the fan 1. The fan 1 is used to generate an airflow along the air inlet 7 toward 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 box body. The air outlet end is connected to the outside of the box body, so that the airflow can flow out of the box body through the fan 1, that is, out of the dehumidifier. After the fan 1 is started, the impeller in the fan 1 rotates. Since the air inlet end faces the air inlet 7, the air on one side of the air inlet 7 is sucked in and discharged through the air outlet end, thereby forming an airflow along the air inlet 7 toward the fan 1.

[0119] The cold end 2 and the hot end 4 of the semiconductor refrigerator 3 share an air inlet 7, that is, part of the wind flowing into the box from the air inlet 7 flows through the cold end 2 and the hot end 4 respectively.

[0120] The dehumidifier also includes a drainage component, which is installed at one end of the air inlet 7. The drainage component is used to discharge the condensed water formed on the surface of the cold end 2, that is, to the outside of the dehumidifier.

[0121] Exemplarily, the drainage assembly includes a water collecting box 5 and a water outlet 6. A groove for collecting condensed water is provided on one side of the water collecting box 5. The water outlet 6 is provided on the other side and is connected to the groove so that the condensed water in the groove can be discharged to the outside through the water outlet 6. The water collecting box 5 is located between the semiconductor refrigerator 3 and the air inlet 7, and at least a part of the water outlet 6 extends to the outside of the air inlet 7. The water collecting box 5 is prohibited from completely blocking the air inlet 7, so that at least a part of the airflow at the air inlet 7 can flow into the cold end 2 and the hot end 4. In this way, the proportion of the air volume flowing from the air inlet 7 to the cold end 2 and the hot end 4 can be adjusted by adjusting the position of the water collecting box 5.

[0122] Exemplarily, the water outlet 6 and the water collecting box 5 are an integrated structure. In actual use, they can also be two independent components, the water outlet 6 and the water collecting box 5 are fixedly or detachably connected together, and the water outlet 6 is communicated with the groove of the water collecting box 5.

[0123] When the dehumidifier is in use, the installation orientation of the dehumidifier meets condition 1. The installation orientation refers to the direction in which the dehumidifier is installed in the application environment: Condition 1: The direction from the fan 1 to the air inlet 7 is consistent with the direction of gravity.

[0124] The installation orientation of the dehumidifier satisfies 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 consistent with the direction from the fan 1 to the air inlet 7.

[0125] When the dehumidifier is in use, the airflow direction of the fan 1 is exactly opposite to the flow direction of the condensed water under the action of gravity. The drainage direction of the condensed water is from the fan 1 to the air inlet 7, that is, the direction of gravity; the airflow direction is from the air inlet 7 to the fan 1, and the airflow direction and the drainage direction are exactly opposite. Under such structural restrictions, 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 drainage. In order to reduce the impact of the airflow on the drainage, the processing of step 4 is provided.

[0126] In step 4, when the dehumidifier is in the dehumidification working state or for a period of time after being shut down, it is necessary to drain the water on the surface of the cold end 2 of the semiconductor refrigerator 3 in time to reduce the secondary evaporation of condensed water in the water collecting device in the dehumidifier, so as to achieve the effect of enhancing the dehumidification capacity of the dehumidifier, that is, to increase the dehumidification capacity of the dehumidifier. Therefore, step 4 needs to be executed during non-sampling time, that is, it is forbidden to execute scheme 1 or scheme 2 in step 3 to avoid conflict with the execution scheme adopted during sampling. Preferably, step 4 is executed when the dehumidifier is in the dehumidification working state.

[0127] Whether step 4 needs to be executed can be achieved by setting a dehumidification enhancement instruction. When the chef enhancement instruction is received, step 4 is executed, otherwise, step 4 is not executed.

[0128] Step 4: In a cycle, every time the fan 1 runs for the first time length a, the fan 1 stops running for the second time length b, and , c is a preset ratio threshold, c>1. Then the fan 1 continues to enter the next cycle, that is, after stopping for the second time length b, the fan 1 continues to run for the first time length a, and then continues to stop for the second time length b, and so on, until the processing is finished.

[0129] Among them, the first time length a needs to be much greater than the second time length b, so that after the fan 1 runs for a long period of time, the fan 1 stops running for a short time. During the period of stopping operation, no airflow will be generated at the cold end 2 and the hot end 4 of the semiconductor refrigerator 3, thereby eliminating the obstruction of the airflow to the condensed water. Under the action of gravity, the condensed water can flow from the cold end 2 into the drainage component in time and be discharged to the outside of the dehumidifier through the drainage component.

[0130] During the period when the fan 1 stops running, the semiconductor refrigerator 3 is still powered and keeps working, that is, the semiconductor refrigerator 3 still maintains dehumidification.

[0131] The purpose of stopping the operation of the fan 1 is to eliminate the influence of the airflow generated by the operation of the fan 1 on the condensed water under the action of gravity by shutting down the fan 1, so as to ensure that the condensed water can be discharged smoothly. To this end, other schemes can also be adopted to realize the control of the working state of the fan, and the control of the working state of the fan includes: controlling the operating time ratio of the fan on and off, or controlling the operating power of the fan, or controlling the installation position of the fan, or controlling the direction angle of the fan, or controlling the blowing direction of the fan, or controlling the air intake of the fan.

[0132] Specifically, scheme b: the fan 1 operates at low power consumption, so that it cannot generate effective airflow, or the airflow generated is not enough to flow to the surface of the cold end 2 of the semiconductor refrigerator 3, or the airflow generated can flow to the surface of the cold end 2 of the semiconductor refrigerator 3, but the airflow intensity generated is not enough to prevent the condensed water from being discharged under the action of gravity. Among them, the installation position of the fan 1 and the semiconductor refrigerator 3 are spaced apart, so there is a distance between the two. In addition, the air inlet 7 is also at a certain distance from the surface of the cold end 2 of the semiconductor refrigerator 3.

[0133] Solution c: Fan 1 rotates in the opposite direction, so that the airflow generated by fan 1 changes from being opposite to the drainage direction of the condensed water to being the same as the drainage direction. This not only does not hinder the discharge of the condensed water, but also works together with gravity to promote the discharge of the condensed water, thereby speeding up the discharge of the condensed water.

[0134] The direction rotation of the fan 1 means that the blades of the fan 1 change from the original forward rotation (clockwise) to the reverse rotation (counterclockwise), or from the original reverse rotation (counterclockwise) to the forward rotation (clockwise).

[0135] Solution d: Adjust the installation position of fan 1 so that the airflow generated by fan 1 blows to other areas, but is prohibited from blowing to the area where the surface of the cold end 2 of semiconductor refrigerator 3 is located, that is, the airflow generated by fan 1 blows to the designated area, and the designated area does not include the area where the surface of 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, it is still along the direction from air inlet 7 to fan 1.

[0136] Solution e: Adjust the direction angle of the fan 1 so that the airflow generated by the fan 1 blows to other areas, but is prohibited from blowing to the surface of the cold end 2 of the semiconductor refrigerator 3, or allows a part of the airflow to blow to the surface of the cold end 2 of the semiconductor refrigerator 3, and most of the airflow is prohibited from blowing to the surface of the cold end 2 of the semiconductor refrigerator 3. In this way, although a part of the airflow can blow to the surface of the cold end 2 of the semiconductor refrigerator 3, it is not enough to hinder the discharge of condensed water. Compared with solution d, this solution does not need to adjust the installation position of the fan 1, but only changes the direction angle of the fan 1, for example, install a fan 1 that can turn and stay at different angles.

[0137] Solution f: a flow guide assembly with a channel is provided, a direction-adjusting member with a controllable angle is provided in the channel, and the direction-adjusting member is adjusted to be at a second angle. When the steering member is at a first angle, the airflow flows to the surface of the semiconductor refrigerator 3; when the steering member is at a second angle, the airflow is prohibited from flowing to the surface of the semiconductor refrigerator 3, that is, the airflow is restricted from flowing to the surface of the semiconductor refrigerator 3 and flows to other areas, thereby guiding the airflow generated by the fan 1 to other areas on the surface of the cold end 2 of the semiconductor refrigerator 3 through the guide assembly. The angle-controllable steering member can be implemented based on the existing technology. Since this solution is not aimed at this structure as an improvement point, the specific structure of the angle-controllable steering member is not repeated here.

[0138] Solution g: Block the air intake of fan 1, that is, limit the airflow into fan 1 (limit air intake). For example, seal the air inlet 7 with a seal (such as a baffle) so that external air cannot enter fan 1 through air inlet 7. In this way, although fan 1 is in operation (fan 1 rotates), no airflow can be generated because no air enters. For another example, cover the air inlet end of fan 1 with a seal (such as a sealing cover), which also blocks air from entering fan 1. Even if fan 1 is in operation, no air can be generated because no air enters. These structures can be implemented based on the existing technology. Since this solution is not aimed at improving this structure, the specific structure for preventing fan 1 from air intake is not described here.

[0139] Solution h: The cold end 2 and the hot end 4 of the semiconductor refrigerator 3 are switched by reversely connecting the power supply, so that the original cold end 2 of the semiconductor refrigerator 3 becomes the hot end 4, and the original hot end 4 becomes the cold end 2. In this way, the condensed water on the surface of the original cold end 2 can release heat and evaporate because it becomes the hot end 4, which also achieves the same effect as discharging the condensed water.

[0140] Among them, scheme h is to control the working state of the semiconductor refrigerator 3, that is, in addition to controlling the working state of the fan, the working state of the semiconductor refrigerator 3 can also be controlled to achieve smooth drainage. Controlling the working state of the semiconductor refrigerator 3 can replace controlling the working state of the fan 1, and can also include controlling the working state of the semiconductor refrigerator 3 on the basis of controlling the working state of the fan 1. Controlling the working state of the semiconductor refrigerator 3 includes reversing the polarity of the cold end 2 and the hot end 4 of the semiconductor refrigerator 3 by reversely connecting the power supply, so as to realize that the original cold end 2 of the semiconductor refrigerator 3 becomes the hot end 4, and the original hot end 4 becomes the cold end 2.

[0141] In an optional embodiment, when the dehumidifier enters the dehumidification working state, after detecting that condensed water is formed on the surface of the cold end 2 of the semiconductor refrigerator 3, step 4 is executed.

[0142] Whether condensed water is formed on the surface of the cold end 2 can be detected and identified by sensors or vision (taking photos and forming images) or other existing technologies. Since this is existing technology, it will not be described in detail here.

[0143] Exemplarily, the first duration a=5 min (minutes), the second duration b=10 S (seconds), that is, a / b=10, c≤10. Another exemplary example, the first duration a=30 min, b=5 S; the first duration a=25 min, b=30 S; the first duration a=15 min, b=60 S. Under the ratio of these two durations, the running time of fan 1 is much greater than the stopping time. For the dehumidification effect, the stopping time will hardly affect the dehumidification, and the effect on the cooling capacity of the cold end 2 of the semiconductor refrigerator 3 is very small, that is, the effect of stopping the operation for such a short time on the dehumidification of the dehumidifier can be ignored. However, during the period when the fan 1 stops running, the condensed water can be discharged in time, reducing the secondary evaporation of the condensed water in the drainage component, which is equivalent to increasing the dehumidification capacity.

[0144] In actual use, the first duration a and the second duration b may also take other values. For example, a=4 min, b=7 s. Of course, other values ​​may also be taken, and the specific values ​​of the two durations are not exhaustively listed here.

[0145] This step sets the ratio of the duration of fan 1 stopping and running to take into account the following situations: If the fan 1 is turned off directly for a long time without generating airflow, the semiconductor refrigerator 3 cannot achieve heat exchange, and therefore, the dehumidification effect cannot be achieved. Therefore, the fan 1 cannot be turned off directly. Therefore, during the start-up process of the dehumidifier, as long as dehumidification is required, the fan 1 cannot be turned off for a long time, and airflow will inevitably exist. At the same time, the structural relationship between the fan 1 and the semiconductor refrigerator 3 cannot be changed to change the direction of the airflow.

[0146] In such a situation, by stopping the fan 1 for an extreme period of time at regular intervals, the condensed water can be drained away without affecting or having little effect on the cooling and dehumidification effects.

[0147] It should be noted that step 4 can be implemented independently or in any of the above steps. Through the processing of step 4, the condensed water can be drained away well, and the problem pointed out in point 4 described in the background technology can be solved.

[0148] Through the above processing, the problems pointed out in the background technology can be well solved, including increasing the service life of the dehumidifier, avoiding frost or ice on the cold end 2 of the semiconductor refrigerator 3 in the dehumidifier, ensuring the timely discharge of condensed water, ensuring the dehumidification effect, and accurately collecting the ambient temperature and relative humidity, and reducing energy consumption.

[0149] The embodiment disclosed in this specification is only an example of the unilateral features of the present invention, and the protection scope is not limited to this embodiment. Any other functionally equivalent embodiments fall within the protection scope of the present invention. For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A dehumidifier dehumidification capacity enhancement control method, characterized in that: The dehumidifier includes a semiconductor refrigerator and a fan. The airflow direction generated by the fan in the working state is opposite to the drainage direction of the condensed water formed on the cold end of the semiconductor refrigerator, and the drainage direction is consistent with the gravity direction. When the dehumidification enhancement instruction is received, the working state of the fan is controlled to eliminate or weaken the influence of the airflow generated by the fan on the drainage of condensed water.

2. The dehumidification capacity enhancement control method of a dehumidifier according to claim 1, characterized in that: The control of the working state of the fan includes: controlling the operating time ratio of the fan to be turned on and off, or controlling the operating power of the fan, or controlling and adjusting the installation position of the fan, or controlling and adjusting the direction angle of the fan, or controlling and adjusting the blowing direction of the fan, or controlling the air intake of the fan.

3. The dehumidification capacity enhancement control method of a dehumidifier according to claim 2, characterized in that: The control of the operating time ratio of the fan on and off includes solution a, the control of the operating power of the fan includes solution b, the control of the installation position of the fan includes solution d, the control of the orientation angle of the fan includes solution e, the control of the blowing direction of the fan includes solution c or solution f, and the control of the air intake of the fan includes solution g. Solution a: In a cycle, the fan runs for a first duration a, then stops running for a second duration b, and , c is the preset ratio threshold, c>1, then the fan continues to enter the next cycle, and continues in sequence until the processing is completed. When the fan stops running, the semiconductor cooler keeps running; Solution b: The fan is operated at a preset power so that the airflow generated is not sufficient to flow to the cold end surface of the semiconductor refrigerator, or the airflow generated can flow to the cold end surface of the semiconductor refrigerator but is not sufficient to prevent the condensed water from being discharged under the action of gravity; Solution c: The fan rotates in the opposite direction so that the airflow generated by the fan becomes the same as the drainage direction; Solution d: Adjust the installation position of the fan so that the airflow generated by the fan blows to the designated area, and the designated area excludes the area where the cold end of the semiconductor refrigerator is located; Solution e: Adjust the direction angle of the fan so that the airflow generated by the fan is prohibited from blowing toward the cold end surface of the semiconductor refrigerator, or a part of the airflow is allowed to blow toward the cold end surface of the semiconductor refrigerator, and this part of the airflow is not enough to prevent the condensed water from being discharged under the action of gravity; Solution f: a flow guide assembly with a channel is provided, wherein a direction-adjusting member with a controllable angle is provided in the channel, the direction-adjusting member can be switched between a first angle and a second angle, and the direction-adjusting member is adjusted to be at the second angle. Wherein, when the direction-adjusting member is at a first angle, the airflow flows toward the surface of the semiconductor refrigerator, and when the direction-adjusting member is at a second angle, the airflow is restricted from flowing toward the surface of the semiconductor refrigerator; Solution g: Restrict the air intake of the fan so that the fan cannot generate airflow.

4. The dehumidification capacity enhancement control method of a dehumidifier according to claim 1, characterized in that: When receiving the dehumidification enhancement command, in addition to controlling the working state of the fan, it also controls the working state of the semiconductor refrigerator. Alternatively, when the dehumidification enhancement instruction is received, the working state of the semiconductor refrigerator is controlled to replace the step of controlling the working state of the fan, The control of the working state of the semiconductor refrigerator includes reversing the polarity of the cold end and the hot end of the semiconductor refrigerator by reversely connecting the power supply.

5. The dehumidification capacity enhancement control method of a dehumidifier according to claim 1, characterized in that: The cold end and hot end of the semiconductor refrigerator share an air inlet. The direction of the air flow generated when the fan is in working state is the path formed by the air inlet, the semiconductor refrigerator and the fan in sequence. The condensed water is discharged to the outside of the dehumidifier under the action of gravity.

6. The dehumidification capacity enhancement control method of a dehumidifier according to claim 1, characterized in that: It also includes that only when the dehumidifier is started and enters the dehumidification working state, and after the dehumidification enhancement instruction is received, the step of controlling the working state of the fan is executed to eliminate or weaken the influence of the fan airflow on the drainage of condensed water.

7. The dehumidification capacity enhancement control method of a dehumidifier according to claim 3, characterized in that: a=5 min, b=10S, c≤10.

8. The dehumidification capacity enhancement control method of a dehumidifier according to any one of claims 1 to 7, characterized in that: The dehumidifier is installed vertically along the direction from the fan to the air inlet, the air inlet is located at the lower end, the fan is located at the upper end, the direction of gravity is consistent with the direction of the path formed along the fan to the air inlet, the drainage direction is the same as the path direction, and the airflow direction is opposite to the path direction.

9. The dehumidification capacity enhancement control method of a dehumidifier according to claim 3, characterized in that: The fan stops running. In scheme g, the fan is sealed at the air inlet by a seal, or the fan is sealed at the air inlet end by a seal, so as to prevent the air flow from flowing into the fan and thus prevent the air flow from being generated.

10. The dehumidification capacity enhancement control method of a dehumidifier according to claim 3, characterized in that: When the dehumidifier enters the dehumidification working state, after detecting that condensed water is formed on the cold end surface of the semiconductor refrigerator, any one of the schemes a to g is executed.

11. The dehumidification capacity enhancement control method of a dehumidifier according to any one of claims 1 to 7, characterized in that: The dehumidifier also includes a box body, a semiconductor refrigerator and a fan are installed in the inner cavity of the box body, and the fan is located on one side of the semiconductor refrigerator. The airflow formed by the fan in the working state can cover the cold end and the hot end of the semiconductor refrigerator. The air inlet is arranged on the box body, the air inlet end of the fan faces the air inlet, the air outlet end faces away from the air inlet and is located on the box body, and the air outlet end is communicated with the outside of the box body.

12. The dehumidification capacity enhancement control method of a dehumidifier according to claim 11, characterized in that: The dehumidifier further comprises a drainage assembly, which is used for discharging the condensed water out of the dehumidifier.

13. The dehumidification capacity enhancement control method of a dehumidifier according to claim 12, characterized in that: The drainage assembly is installed at one end of the air inlet.

14. The dehumidification capacity enhancement control method of a dehumidifier according to claim 13, characterized in that: The drainage assembly includes a water collecting box and a water outlet. A groove for collecting condensed water is arranged on one side of the water collecting box, and the water outlet is arranged on the other side and connected with the groove so that the condensed water in the groove can be discharged to the outside through the water outlet.

15. The dehumidification capacity enhancement control method of a dehumidifier according to claim 14, characterized in that: The water collecting box is located between the semiconductor refrigerator and the air inlet, and at least a part of the water outlet nozzle extends to the outside of the air inlet.

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