Humidity control system and method for an environmental chamber

Abstract

The present application relates to the technical field of humidity adjustment of environment simulation cabin, and discloses a humidity control system of environment simulation cabin, the environment simulation cabin is divided into condensation dehumidification section, uniform diffusion section and ultrasonic humidification section, wherein, the uniform diffusion section is arranged between the condensation dehumidification section and the ultrasonic humidification section, the condensation dehumidification section is provided with condensation plates for reducing humidity in the environment simulation cabin, the ultrasonic humidification section is provided with an ultrasonic humidifier and a water tank for improving humidity in the environment simulation cabin, a humidity sensor for obtaining current humidity at the position between the condensation dehumidification section and the ultrasonic humidification section is arranged, the power of the condensation plates of the ultrasonic humidifier is adjusted to make the humidity in the environment simulation cabin uniform and stable, the environment simulation cabin is divided into three areas, the average humidity of the contact surface of the selected area is taken as a control point, and the humidity of the uniform diffusion section is more effectively controlled.

Description

Technical Field

[0001] This invention relates to the field of humidity control technology for environmental simulation chambers, and more particularly to a humidity control system and method for an environmental simulation chamber. Background Technology

[0002] Controllable environment simulation systems mainly refer to environmental simulation chambers. These chambers can simulate the corresponding target environment within the chamber based on various human-set environmental parameters and maintain it for a relatively long period of time. For specific fields such as medicine and rail transportation, where biological, material, and component physiological or mechanical physical indicators need to be tested in special environments, corresponding environmental conditions need to be set for testing to meet the testing needs of biological, material, and component indicators in special environments in the medical and rail transportation biomedical fields.

[0003] In environmental simulation chambers, relative humidity reflects the amount of water vapor in the air. High humidity inhibits the body's heat dissipation function, while low humidity causes dry, cracked skin and irritates the mucous membranes of the mouth and nose, leading to symptoms such as thirst, dry cough, hoarseness, and sore throat. Humidity varies greatly in different environments. In tropical coastal cities, the average humidity in winter can exceed 90%, while in inland cities far from the ocean, the average humidity in winter is less than 30%. Relative humidity also fluctuates significantly within a single day. Therefore, relative humidity is a key environmental parameter that needs to be controlled in environmental simulation chambers.

[0004] Currently, relative humidity control in environmental simulation chambers primarily relies on humidifiers to increase humidity, allowing water vapor to naturally condense and reduce humidity. While this method is relatively simple, humidity is high near the humidifier's outlet, while other areas experience lower humidity, exhibiting a phenomenon where humidity decreases with distance from the humidifier. This method fails to achieve a uniform humidity level within the environmental simulation chamber, and humidity sensors cannot accurately detect humidity values, negatively impacting humidity control and the consistency of humidity levels for all experimental items. Summary of the Invention

[0005] This invention provides a humidity control system and method for an environmental simulation chamber to solve the problem of poor humidity uniformity in existing environmental simulation chambers.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] In a first aspect, the present invention provides a humidity control system for an environmental simulation chamber. The environmental simulation chamber is divided into a condensation dehumidification section, a uniform diffusion section, and an ultrasonic humidification section. The uniform diffusion section is disposed between the condensation dehumidification section and the ultrasonic humidification section. The condensation dehumidification section is provided with a condensation plate for reducing the humidity in the environmental simulation chamber. The ultrasonic humidification section is provided with an ultrasonic humidifier and a water tank for increasing the humidity in the environmental simulation chamber. A humidity sensor is disposed between the condensation dehumidification section and the ultrasonic humidification section.

[0008] The average humidity of the contact surface between the condensation dehumidification section and the uniform diffusion section is the first humidity, and the average humidity of the contact surface between the uniform diffusion section and the ultrasonic humidification section is the second humidity.

[0009] The condenser plate, ultrasonic humidifier, and water tank regulate the humidity inside the environmental simulation chamber based on the first humidity and the second humidity.

[0010] Through the above design, the environmental simulation chamber is divided into 3 areas, and humidity control is achieved by utilizing the vertical humidity gradient. Combined with the setting of a condenser plate at one end and a water tank and ultrasonic humidifier at the other end in the environmental simulation chamber, the humidity balance in the environmental simulation chamber is dynamically achieved from one end to the other.

[0011] Furthermore, the number of humidity sensors is at least two, namely a first humidity sensor and a second humidity sensor. The first humidity sensor is disposed on the contact surface between the condensation dehumidification section and the uniform diffusion section, and the second humidity sensor is disposed on the contact surface between the uniform diffusion section and the ultrasonic humidification section.

[0012] Through the above design, the humidity inside the chamber is controlled by the average humidity of the contact surface between the condensation dehumidification section and the uniform diffusion section and the contact surface between the uniform diffusion section and the ultrasonic humidification section. This more effectively controls the humidity of the uniform diffusion section, keeps the humidity of the uniform diffusion section dynamically balanced, and thus achieves the effect of precise humidity control.

[0013] Furthermore, the water tank is located outside one end of the environmental simulation chamber, and the ultrasonic humidifier is located inside the environmental simulation chamber at the corresponding position to the water tank.

[0014] With the above design, the water tank is placed outside the cabin, corresponding to the bottom of the ultrasonic humidifier, so that water droplets that liquefy due to high humidity can flow into the water tank. Alternatively, the water tank can be placed in other locations outside the cabin, as long as the water tank is lower than the ultrasonic humidifier to achieve the same effect.

[0015] Furthermore, the water tank is equipped with a hollow fiber filter membrane.

[0016] More preferably, the bottom of the environmental simulation chamber is provided with a water tank, one end of which is connected to the water tank, and the other end of which is located below the condensation plate, with the water tank tilted towards the water tank as a whole.

[0017] More preferably, the top of the environment simulation chamber is an arc-shaped design, and the bottom of the environment simulation chamber is a raised bottom surface.

[0018] Through the above design, the arc-shaped top and the raised bottom surface are used to guide the condensed water into the water tank as much as possible. The inclined design of the water tank also allows the liquid water in the water tank to collect into the water tank, realizing the reuse of water resources.

[0019] Secondly, embodiments of this application provide a humidity control method for an environmental simulation chamber, applied to a humidity control system, including a condenser plate, an ultrasonic humidifier, a humidity sensor, and a water tank. The humidity control method includes the following steps:

[0020] Step 1: Set a preset humidity value according to the humidity adjustment requirements, and set a first humidity limit value and a second humidity limit value based on the preset humidity value. The first humidity limit value is greater than the second humidity limit value. Define the average humidity of the contact surface between the condensation dehumidification section and the uniform diffusion section as the humidity B value, and the average humidity of the contact surface between the uniform diffusion section and the ultrasonic humidification section as the humidity C value. Obtain the humidity B value and humidity C value in the environmental simulation chamber.

[0021] Step 2: Adjust the humidity using the condenser plate and ultrasonic humidifier. Combine time delay compensation and compensation coefficient to adjust the humidity B value and humidity C value to a humidity range that is less than the first humidity limit value and greater than the second humidity limit value, thus completing this humidity control.

[0022] Furthermore, combining time delay compensation and compensation coefficients, the humidity B value and humidity C value are adjusted to be less than the first humidity limit value, and the humidity range greater than the second humidity limit value specifically includes:

[0023] When the humidity B value is greater than the first humidity threshold, the power of the condenser plate is increased; when the humidity B value is less than the second humidity threshold, the power of the condenser plate is decreased.

[0024] When the humidity C value is greater than the first humidity threshold, the power of the ultrasonic humidifier is reduced; when the humidity C value is less than the second humidity threshold, the power of the ultrasonic humidifier is increased.

[0025] The first humidity threshold is calculated by adding time delay compensation to the first humidity limit and multiplying it by a compensation coefficient. The second humidity threshold is calculated by adding time delay compensation to the second humidity limit and multiplying it by a compensation coefficient. The compensation coefficient for the first humidity threshold is 1, and the compensation coefficient for the second humidity threshold is -1.

[0026] Furthermore, both the first humidity limit and the second humidity limit need to be obtained by combining the preset humidity value with the maximum error. The first humidity limit is obtained by the following formula:

[0027]

[0028] The second humidity limit value is obtained by the following formula:

[0029]

[0030] Furthermore, the time delay compensation is the time delay from when the condenser plate or ultrasonic humidifier adjusts its power to when the humidity values ​​B and C are reached, calculated using the following formula:

[0031]

[0032] Where K is the dehumidification coefficient, and its value ranges from 2 × 10⁻⁶. -7 m / s~3×10 -7 m / s;

[0033] L is the distance from the condenser plate to the contact surface between the condensation dehumidification section and the uniform diffusion section, or the distance from the ultrasonic humidifier to the contact surface between the uniform diffusion section and the ultrasonic humidification section.

[0034] H represents the preset humidity value;

[0035] D is the water vapor diffusion coefficient.

[0036] Beneficial effects:

[0037] The present invention provides a humidity control system for an environmental simulation chamber. By using a condenser plate and an ultrasonic humidifier, a controllable humidity difference is formed between the front and rear ends of the environmental simulation chamber. The low temperature during the operation of the condenser plate also causes temperature convection in the middle section of the environmental simulation chamber, which improves the diffusion efficiency of water vapor and makes the humidity in the environmental simulation chamber uniform and stable. The environmental simulation chamber is divided into three areas, and the average humidity of the contact surface of the area is selected as the control point, which more effectively controls the humidity of the uniform diffusion section.

[0038] In the preferred solution of the humidity control system, the arc-shaped top and the raised bottom of the chamber allow all the water vapor inside the chamber to liquefy upon encountering the inner wall and flow into the water tank, and then into the water tank, thus achieving water circulation to a certain extent and increasing the single operation time of the environmental simulation chamber.

[0039] The present invention provides a humidity control method for an environmental simulation chamber. By setting a preset value for time delay compensation, the method avoids the failure to achieve the humidity control effect due to the water vapor diffusion time during the humidity control process. At the same time, the existence of the first humidity limit value and the second humidity limit value also improves the humidity regulation capability of the environmental simulation chamber during the dynamic humidity balance process. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the longitudinal section and segmentation of the environmental simulation chamber according to an embodiment of the present invention;

[0041] Figure 2 This is a cross-sectional schematic diagram of the environmental simulation chamber according to an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram showing the main airflow direction and the main water vapor settling locations during the operation of the environmental simulation chamber in this embodiment of the invention.

[0043] Figure 3 In the image, arrows indicate water vapor deposition and temperature convection.

[0044] Figure 4 This is a schematic diagram showing the relationship between the average humidity of each cross-section inside the cabin and the distance between the condenser plates during the operation of an embodiment of the present invention.

[0045] Figure 4 In the diagram, 1 represents the condensation dehumidification section; 2 represents the uniform diffusion section; 3 represents the ultrasonic humidification section; a represents the humidity at the condenser plate; b represents the average humidity at the interface between the condensation dehumidification section and the uniform diffusion section; c represents the average humidity at the interface between the uniform diffusion section and the ultrasonic humidification section; and d represents the humidity at the ultrasonic humidifier.

[0046] Figures 1-3 middle:

[0047] 1. Condensation plate; 2. Ultrasonic humidifier; 3. Humidity sensor; 31. First humidity sensor; 32. Second humidity sensor; 4. Water tank; 51. Condensation dehumidification section; 52. Uniform diffusion section; 53. Ultrasonic humidification section; 61. Hollow fiber filter membrane; 7. Water tank; 8. Raised bottom surface. Detailed Implementation

[0048] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0050] Please see Figure 1 This application provides a humidity control system for an environmental simulation chamber. The environmental simulation chamber is divided into a condensation dehumidification section 51, a uniform diffusion section 52, and an ultrasonic humidification section 53. The uniform diffusion section 52 is located between the condensation dehumidification section 51 and the ultrasonic humidification section 53. The condensation dehumidification section 51 is provided with a condensation plate 1 for reducing the humidity in the environmental simulation chamber. The ultrasonic humidification section 53 is provided with an ultrasonic humidifier 2 for increasing the humidity in the environmental simulation chamber and a water tank 4. A humidity sensor 3 is provided between the condensation dehumidification section 51 and the ultrasonic humidification section 53.

[0051] The average humidity of the contact surface between the condensation dehumidification section 51 and the uniform diffusion section 52 is the first humidity, and the average humidity of the contact surface between the uniform diffusion section and the ultrasonic humidification section is the second humidity.

[0052] The condenser plate 1, the ultrasonic humidifier 2, and the water tank 4 regulate the humidity inside the environmental simulation chamber according to the first humidity and the second humidity.

[0053] In this embodiment, there are two humidity sensors 3, namely a first humidity sensor 31 and a second humidity sensor 32. The first humidity sensor 31 is disposed on the contact surface between the condensation dehumidification section 51 and the uniform diffusion section 52, and the second humidity sensor 32 is disposed on the contact surface between the uniform diffusion section 52 and the ultrasonic humidification section 53, and is disposed at the bottom of the environmental simulation chamber. In other embodiments, the number and installation position of the humidity sensors 3 can be adjusted according to the length of the environmental simulation chamber and the control accuracy (adjusting the installation position also adjusts the length of the condensation dehumidification section 51, the uniform diffusion section 52 and the ultrasonic humidification section 53). For example, more humidity sensors 3 can be disposed on both sides of the boundary of different areas, and more accurate measurement can be achieved by adjusting the height of the humidity sensors 3.

[0054] Water tank 4 is located outside one end of the environmental simulation chamber, and ultrasonic humidifier 2 is located inside the environmental simulation chamber at the corresponding position to water tank 4.

[0055] In other embodiments, the water tank 4 can be placed at other locations outside one end of the environmental simulation chamber where the ultrasonic humidifier 2 is located. It is only necessary to keep the water tank 4 below the ultrasonic humidifier 2 on a horizontal surface. The liquefied water droplets in the environmental simulation chamber can be recycled into the water tank 4 by means of diversion or other methods.

[0056] Hollow fiber filter membrane 61 is installed in water tank 4.

[0057] Please see Figure 1 as well as Figure 2 The bottom of the environmental simulation chamber is provided with a water tank 7, one end of which is connected to the water tank 4, and the other end of which is located below the condenser plate 1. The water tank 7 is tilted towards the water tank 4. The top of the environmental simulation chamber is an arc-shaped design, and the bottom of the environmental simulation chamber is a raised bottom surface 8.

[0058] The water tank 7 below the condenser plate 1 and the inner wall of the chamber can collect water that has liquefied on its surface. The arc-shaped chamber roof and the arc at the junction of the chamber roof and the inner wall help the water liquefied on the lower surface of the chamber roof drip into the water tank 7 under the action of gravity, while the convex bottom helps the water liquefied on the upper surface of the chamber bottom drip into the water tank 7. In addition, the water tank 7 with a certain slope can draw the collected water into the water tank 4, realizing a certain degree of water circulation and increasing the single operation time of the environmental chamber.

[0059] Please see Figure 3-4 The humidity control system utilizes condenser plate 1 for dehumidification and humidifier for humidification to create a controllable humidity difference between the front and rear ends of the environmental simulation chamber. This allows water vapor to slowly diffuse within the relatively long uniform diffusion section 52, resulting in a simulated environment with uniform and stable humidity. In addition, the temperature difference convection caused by the lower temperature of the condenser dehumidification section 51 also improves water vapor diffusion efficiency. When condenser plate 1 operates at a low temperature, it absorbs heat from the surrounding air while liquefying water vapor, creating low-temperature air. This low-temperature air has a higher density, causing it to sink and carry other air, creating counterclockwise temperature difference convection on the longitudinal section of the inner chamber. This causes the more humid air from the humidification section to move to the upper part of the uniform diffusion section 52, where it combines with the low-temperature, low-humidity air at the lower part of the uniform diffusion section 52 to create a humidity difference in the vertical direction, thus improving water vapor diffusion efficiency.

[0060] This application embodiment also provides a humidity control method for an environmental simulation chamber, applied to the above-mentioned humidity control system. The humidity control method includes the following steps:

[0061] Step 1: Set a preset humidity value according to the humidity adjustment requirements, and set a first humidity limit value and a second humidity limit value based on the preset humidity value. The first humidity limit value is greater than the second humidity limit value. Define the average humidity of the contact surface between the condensation dehumidification section 51 and the uniform diffusion section 52 as the humidity B value, and the average humidity of the contact surface between the uniform diffusion section 52 and the ultrasonic humidification section 53 as the humidity C value. Obtain the humidity B value and humidity C value in the environmental simulation chamber.

[0062] Based on the humidity control requirements, the preset humidity value is set to 50%, and the maximum error is set to 10%. Therefore, the corresponding first humidity limit value is:

[0063]

[0064] The second humidity limit is:

[0065]

[0066] The current humidity value B is 46.2% and the humidity value C is 51.5% obtained from humidity sensor 3.

[0067] Step 2: Adjust the humidity using the condenser plate 1 and the ultrasonic humidifier 2. Combine the time delay compensation and compensation coefficient to adjust the humidity B value and humidity C value to a humidity range that is less than the first humidity limit value and greater than the second humidity limit value, thus completing this humidity control.

[0068] Specifically, during the adjustment process, when the humidity B value is greater than the first humidity threshold, the power of the condenser plate 1 is increased; when the humidity B value is less than the second humidity threshold, the power of the condenser plate 1 is decreased.

[0069] When the humidity C value is greater than the first humidity threshold, the power of the ultrasonic humidifier 2 is reduced; when the humidity C value is less than the second humidity threshold, the power of the ultrasonic humidifier 2 is increased.

[0070] The first humidity threshold is calculated by adding time delay compensation to the first humidity limit and multiplying it by a compensation coefficient. The second humidity threshold is calculated by adding time delay compensation to the second humidity limit and multiplying it by a compensation coefficient. The compensation coefficient for the first humidity threshold is 1, and the compensation coefficient for the second humidity threshold is -1.

[0071] The time delay compensation is the time delay from when the power of the condenser plate 1 or the ultrasonic humidifier 2 is adjusted to the humidity values ​​B and C, calculated using the following formula:

[0072]

[0073] Where K is the dehumidification coefficient, and its value ranges from 2 × 10⁻⁶. -7 m / s~3×10 -7 m / s;

[0074] L is the distance from the condenser plate 1 to the contact surface between the condenser dehumidification section 51 and the uniform diffusion section 52, or the distance from the ultrasonic humidifier 2 to the contact surface between the uniform diffusion section 52 and the ultrasonic humidification section 53.

[0075] H represents the preset humidity value;

[0076] D is the water vapor diffusion coefficient.

[0077] In this embodiment, K is set to 2.6 × 10⁻⁶. -7 The speed is m / s, the distance from the condenser plate 1 to the contact surface between the condensation dehumidification section 51 and the uniform diffusion section 52 is 0.5m, the distance from the ultrasonic humidifier 2 to the contact surface between the uniform diffusion section 52 and the ultrasonic humidification section 53 is 0.5m, the preset humidity value is 50%, and the water vapor diffusion coefficient D is 2.6×10 m / s. -5 m / s.

[0078] Therefore, the time delay compensation is:

[0079]

[0080] Therefore, the humidity B value is less than the first humidity threshold, i.e., 46.2% < 52.5% + 1% × 1, and the humidity B value is less than the second humidity threshold, i.e., 46.2% < 47.5% + 1% × - 1. Therefore, the power of the condenser plate 1 is reduced until the humidity B value is greater than 46.5% and less than 53.5%.

[0081] At this point, the humidity C value is less than the first humidity threshold, i.e., 51.5% < 52.5% + 1% × 1, and the humidity C value is greater than the second humidity threshold, i.e., 51.5% > 47.5% + 1% × - 1. Therefore, the power of the ultrasonic humidifier 2 is not adjusted, and the humidity control is completed.

[0082] In this embodiment, when adjusting humidity, the initial power of the condenser plate and the ultrasonic humidifier is 50W. The humidity B value and humidity C value are acquired every minute and compared with the first humidity threshold and the second humidity threshold. If the power of the condenser plate 1 or the ultrasonic humidifier 2 needs to be adjusted, the power is increased or decreased by 10W each time. In other embodiments, the initial power of the condenser plate 1 and the ultrasonic humidifier 2, the interval time for acquiring the humidity B value and humidity C value, and the power of the condenser plate 1 and the ultrasonic humidifier 2 can be adjusted according to the accuracy of humidity control to achieve more precise humidity control. This will not be elaborated here.

[0083] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A humidity control system for an environmental chamber, characterized in that, The environmental simulation chamber is divided into a condensation dehumidification section (51), a uniform diffusion section (52), and an ultrasonic humidification section (53). The uniform diffusion section (52) is located between the condensation dehumidification section (51) and the ultrasonic humidification section (53). The condensation dehumidification section (51) is equipped with a condensation plate (1) for reducing the humidity in the environmental simulation chamber. The ultrasonic humidification section (53) is equipped with an ultrasonic humidifier (2) for increasing the humidity in the environmental simulation chamber and a water tank (4). A humidity sensor (3) is located between the condensation dehumidification section (51) and the ultrasonic humidification section (53). The average humidity of the contact surface between the condensation dehumidification section (51) and the uniform diffusion section (52) is the first humidity, and the average humidity of the contact surface between the uniform diffusion section and the ultrasonic humidification section is the second humidity. The condenser plate (1), the ultrasonic humidifier (2), and the water tank (4) regulate the humidity inside the environmental simulation chamber according to the first humidity and the second humidity.

2. The humidity control system of claim 1, wherein, The number of humidity sensors (3) is at least two, namely a first humidity sensor (31) and a second humidity sensor (32). The first humidity sensor (31) is disposed on the contact surface between the condensation dehumidification section (51) and the uniform diffusion section (52), and the second humidity sensor (32) is disposed on the contact surface between the uniform diffusion section (52) and the ultrasonic humidification section (53).

3. The humidity control system of claim 1, wherein, The water tank (4) is located outside one end of the environmental simulation chamber, and the ultrasonic humidifier (2) is located inside the environmental simulation chamber at the corresponding position to the water tank (4).

4. The humidity control system of claim 1, wherein, The water tank (4) is equipped with a hollow fiber filter membrane (61).

5. The humidity control system of any one of claims 1-4, wherein, The bottom of the environmental simulation chamber is provided with a water tank (7), and one end of the water tank (7) is connected to the water tank (4), and the other end of the water tank (7) is located below the condenser plate (1). The water tank (7) is tilted towards the water tank (4) as a whole.

6. The humidity control system of claim 3, wherein, The top of the environmental simulation chamber is an arc-shaped design, and the bottom of the environmental simulation chamber is a raised bottom surface (8).

7. A method of humidity control for an environmental chamber, characterized by, The humidity control method, applied to any one of claims 1-6, comprises the following steps: Step 1: Set a preset humidity value according to the humidity adjustment requirements, and set a first humidity limit value and a second humidity limit value according to the preset humidity value. The first humidity limit value is greater than the second humidity limit value. Define the average humidity of the contact surface between the condensation dehumidification section (51) and the uniform diffusion section (52) as the humidity B value, and the average humidity of the contact surface between the uniform diffusion section (52) and the ultrasonic humidification section (53) as the humidity C value. Obtain the humidity B value and humidity C value in the environmental simulation chamber. Step 2: Adjust the humidity by using the condenser plate (1) and the ultrasonic humidifier (2), and combine the time delay compensation and compensation coefficient to adjust the humidity B value and humidity C value to a humidity range that is less than the first humidity limit value and greater than the second humidity limit value, thus completing this humidity control.

8. The humidity control method according to claim 7, characterized in that, Combining time delay compensation and compensation coefficients, the humidity values ​​B and C are adjusted to be lower than the first humidity limit and higher than the second humidity limit. Specifically, the humidity range includes: When the humidity B value is greater than the first humidity threshold, the power of the condenser plate (1) is increased; when the humidity B value is less than the second humidity threshold, the power of the condenser plate (1) is decreased. When the humidity C value is greater than the first humidity threshold, the power of the ultrasonic humidifier (2) is reduced; when the humidity C value is less than the second humidity threshold, the power of the ultrasonic humidifier (2) is increased. The first humidity threshold is calculated by adding time delay compensation to the first humidity limit and multiplying it by a compensation coefficient. The second humidity threshold is calculated by adding time delay compensation to the second humidity limit and multiplying it by a compensation coefficient. The compensation coefficient for the first humidity threshold is 1, and the compensation coefficient for the second humidity threshold is -1.

9. The humidity control method according to any one of claims 7, 8, characterized in that, Both the first humidity limit and the second humidity limit need to be obtained by combining the preset humidity value with the maximum error. The first humidity limit is obtained by the following formula: ； The second humidity limit value is obtained by the following formula: 。 10. The humidity control method according to any one of claims 7, 8, wherein, The time delay compensation is the time delay from when the power of the condenser plate or ultrasonic humidifier is adjusted to the humidity values ​​B and C, calculated using the following formula: ； Wherein, K is the dehumidification coefficient, the value range is ; is the distance from the condensing plate to the contact surface of the condensing dehumidifying section and the uniform diffusion section or the distance from the ultrasonic humidifier to the contact surface of the uniform diffusion section and the ultrasonic humidifying section; Humidity is a preset value; D is the water vapor diffusion coefficient.

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