Dehumidification control method, control system and dehumidifier

Abstract

The present invention provides a dehumidification control method, a control system, and a dehumidifier, which belong to the field of dehumidifier control technology. The method includes: after the dehumidifier starts the dehumidification function, according to the first air state parameter of the input side air of the evaporator and a preset relationship table, the maximum dehumidification amount corresponding to the first air state parameter for different output side air temperatures is obtained, and the relationship table records the correspondence between the first air state parameter, the output side air temperature of the output side air of the evaporator, the maximum dehumidification amount, and the air volume; the maximum value of the maximum dehumidification amounts corresponding to the first air state parameter for different output side air temperatures is selected as the first dehumidification amount; the first air volume is determined according to the first air state parameter, the first dehumidification amount, and the relationship table; the fan of the dehumidifier is controlled to output according to the first air volume. The dehumidification control method of the present invention can adjust the air volume in real time, always keep the dehumidification amount at the maximum, and provide more accurate control.

Description

Technical Field

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

[0002] The core of household dehumidifiers currently on the market is a refrigeration system, which consists of only ordinary compressors, evaporators, condensers, capillaries and other components. The dehumidification capacity of dehumidifiers on the market is generally adjusted by the wind speed gear (high, medium, low). However, adjusting the dehumidification capacity by the fan gear is not accurate enough because many factors affect the dehumidification capacity of the dehumidifier, such as evaporation temperature, air volume, external ambient temperature and humidity, etc. Therefore, the greater the air volume, the greater the dehumidification capacity. In other words, for the same indoor room, by increasing the air intake of the dehumidifier, the dehumidification effect is not necessarily faster or better. At the same time, as the air volume increases, the noise also increases, the human body's thermal comfort deteriorates, and the user experience also decreases.

[0003] like Figure 1 As shown in the figure, point 4 represents the dry air state at the dehumidifier outlet, point 1 represents the wet air state at the dehumidifier inlet, points 1-2 represent the cooling of the wet air to the dew point temperature through the evaporator, points 2-3 represent the condensation of moisture in the wet air on the evaporator surface, and points 3-4 represent the process of the dry air after it is discharged from the condenser. According to the dehumidification formula G1 = Q1 × (d1-d3), G1 represents the dehumidification of the wet air after it is discharged from the dehumidifier, d1 and d3 represent the moisture content at points 1 and 3, respectively, and Q represents the air volume. However, when different air volumes enter the dehumidifier, the air state after cooling to the dew point temperature (the temperature corresponding to point 2) will not completely follow the 100% cooling isohumidity line. In other words, the outside air will not completely condense water on the evaporator according to the 2-3 state process. When the air volume increases or decreases, the air can also condense water according to the 1-2-5-4 state process. In this case, the air condensation process is 2-5, and the air state at point 5 is not saturated. At this time, the dehumidification capacity G2 = Q2 × (d1-d5), Figure 1 As we can see, d1-d3=d1-d5, so G1=Q1×Δd, G2=Q2×Δd, and G1≠G2. Therefore, G1 is not necessarily the maximum dehumidification capacity, and the corresponding air volume Q1 is not necessarily the air volume corresponding to the maximum dehumidification capacity.

[0004] Therefore, the control method of increasing the air volume according to the increase in dehumidification demand in the prior art is not accurate, and this control method cannot ensure the maximum dehumidification capacity. Summary of the Invention

[0005] One purpose of the first aspect of the present invention is to provide a dehumidification control method that can adjust the air volume in real time, always maintain the maximum dehumidification amount, and provide more accurate control.

[0006] A further object of the present invention is to enhance user comfort and improve user experience through variable air volume adjustment.

[0007] A further object of the present invention is to ensure maximum dehumidification capacity while preventing frost on the evaporator.

[0008] Another object of the present invention is to save energy consumption.

[0009] An object of the second aspect of the present invention is to provide a control system for implementing the above-mentioned dehumidification control method.

[0010] An object of the third aspect of the present invention is to provide a dehumidifier comprising the above control system.

[0011] In particular, the present invention provides a dehumidification control method, comprising:

[0012] After the dehumidifier starts the dehumidification function, the maximum dehumidification amounts corresponding to different output-side air temperatures of the first air state parameter are obtained based on a first air state parameter of the input-side air of the evaporator and a preset relationship table, wherein the relationship table records a correspondence between the first air state parameter, the output-side air temperature of the output-side air of the evaporator, the maximum dehumidification amount, and the air volume;

[0013] selecting a maximum value among the maximum dehumidification capacities corresponding to different output-side air temperatures of the first air state parameter as a first dehumidification capacity;

[0014] determining a corresponding first air volume according to the first air state parameter, the first dehumidification amount, and the relationship table;

[0015] The fan of the dehumidifier is controlled to output air according to the first air volume.

[0016] Optionally, after the step of controlling the fan of the dehumidifier to output air according to the first air volume, the step further includes:

[0017] detecting the measured air temperature at the output side of the evaporator;

[0018] determining whether the measured air temperature is less than or equal to a frosting reference temperature of the evaporator;

[0019] If so, the maximum dehumidification capacity closest to the first dehumidification capacity among the candidate dehumidification capacities in the relationship table is selected as the second dehumidification capacity, and a second air volume corresponding to the second dehumidification capacity is searched, wherein the candidate dehumidification capacity is the maximum dehumidification capacity corresponding to the first air state parameter that satisfies the requirement that the output side air temperature is greater than the frosting reference temperature;

[0020] The fan is controlled to output air at the second air volume.

[0021] Optionally, after the step of selecting the maximum dehumidification capacity closest to the first dehumidification capacity among the candidate dehumidification capacities in the relationship table as the second dehumidification capacity and searching for the second air volume corresponding to the second dehumidification capacity, the method further includes:

[0022] If there are multiple second dehumidification capacities, the second air volumes corresponding to each second dehumidification capacity are compared and the minimum value is selected to control the fan to output according to the minimum value of all the second air volumes.

[0023] Optionally, after the step of controlling the fan to output air at the second air volume, the step further includes:

[0024] querying the relationship table according to the second air volume to obtain the corresponding output side air temperature;

[0025] Determining whether the difference between the output side air temperature and the frosting reference temperature is less than a preset value;

[0026] If so, the process returns to the step of detecting the measured air temperature after the fan runs for a preset time, until the measured air temperature is less than or equal to the frosting reference temperature of the evaporator.

[0027] Optionally, after the step of determining whether the measured air temperature is less than or equal to the frost reference temperature of the evaporator, the method further includes:

[0028] If not, the fan is controlled to continue outputting air at the first air volume.

[0029] Optionally, the first air state parameter includes input side air temperature and input side air relative humidity.

[0030] Optionally, after the dehumidifier starts the dehumidification function, before the step of obtaining the first dehumidification amount and the first air volume corresponding to the current air environment according to the first air state parameter of the air on the input side of the evaporator and a preset relationship table includes:

[0031] detecting the input side air temperature and the input side air relative humidity;

[0032] Determining whether the relative humidity of the air at the input side is greater than a preset relative humidity threshold;

[0033] If so, control the dehumidifier to start the dehumidification function.

[0034] In particular, the present invention also provides a control system, including a controller, the controller including a memory and a processor, the memory storing a control program, and the control program, when executed by the processor, is used to implement any of the above-mentioned dehumidification control methods.

[0035] Optionally, the control system further includes:

[0036] The first temperature sensor and the humidity sensor are both arranged on the air input side of the evaporator, and are used to detect the input side air temperature and the input side air relative humidity respectively;

[0037] The second temperature sensor is arranged at the air output side of the evaporator and is used to detect the air temperature at the output side.

[0038] In particular, the present invention also provides a dehumidifier comprising the above-mentioned control system.

[0039] According to one embodiment of the present invention, by obtaining the corresponding relationship between the ambient air parameters (i.e., the first air state parameters), the output side air temperature of the output side air of the evaporator, the maximum dehumidification amount and the air volume in advance, after the dehumidifier starts the dehumidification function, the corresponding maximum dehumidification amounts are found according to the current ambient air parameters and the maximum value among them is used as the first dehumidification amount. The fan output is controlled according to the first air volume corresponding to the first dehumidification amount, so that the dehumidifier adjusts the appropriate air volume to ensure the maximum dehumidification amount, that is, the fastest dehumidification.

[0040] Furthermore, the control process described above determines the fan's air volume based on ambient air parameters. This allows the dehumidifier to adjust the air volume in real time based on outdoor air conditions, consistently maintaining maximum dehumidification. Compared to existing methods that simply increase air volume to achieve maximum dehumidification, this solution saves energy, improves energy efficiency, and offers higher dehumidification efficiency and more accurate control. Variable air volume adjustment improves user comfort and enhances the user experience.

[0041] According to one embodiment of the present invention, after the fan is operated at the air volume corresponding to the maximum dehumidification capacity under the current ambient air conditions, if it is detected that the measured air temperature on the output side of the evaporator is less than or equal to the frost reference temperature, it indicates that the evaporator is at risk of frost. At this time, the second dehumidification capacity closest to the first dehumidification capacity is searched, that is, the dehumidification capacity is appropriately reduced, and the fan is controlled to operate at the second air volume corresponding to the second dehumidification capacity. In this way, the maximum dehumidification capacity can be guaranteed while preventing the evaporator from frosting.

[0042] According to one embodiment of the present invention, since there may be multiple maximum dehumidification capacities (i.e., second dehumidification capacities) among the alternative dehumidification capacities that are closest to the first dehumidification capacities, the final output air volume of the fan can be determined based on the size of the second air volume corresponding to each second dehumidification capacities. This embodiment uses the minimum value of each second air volume as the final output air volume of the fan, which can effectively save energy consumption while still ensuring the maximum dehumidification capacity.

[0043] Furthermore, by controlling the connection between the first and second four-way valves, the refrigerant flow path can be changed, thereby forming a heating cycle mode. The first and second outdoor heat exchangers function as evaporators, while the third and fourth indoor heat exchangers function as condensers, creating a heating cycle mode. At this point, the outdoor fresh air flows through the fourth and third heat exchangers before flowing into the room as hot air. This achieves both heating and fresh air functions simultaneously, ensuring that the incoming fresh air is hot.

[0044] According to one embodiment of the present invention, after the fan is running at the second air volume, the measured air temperature on the output side of the evaporator is detected again, so as to accurately determine whether the evaporator is frosted. If the measured air temperature is still detected to be less than or equal to the frosting reference temperature, the third dehumidification amount closest to the second dehumidification amount is continuously selected, and the dehumidification amount is reduced again to prevent the evaporator from frosting.

[0045] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0047] Figure 1 It is a working principle diagram of a dehumidifier in the prior art;

[0048] Figure 2 is a flow chart of a dehumidification control method according to one embodiment of the present invention;

[0049] Figure 3 is a schematic diagram of a control system corresponding to a dehumidification control method according to an embodiment of the present invention;

[0050] Figure 4 is a flow chart of a dehumidification control method according to another embodiment of the present invention;

[0051] Figure 5 is a connection block diagram of a control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of the features, or one or more of the features. When a feature "includes or includes" one or more of the features it covers, unless otherwise specifically stated, this indicates that other features are not excluded and may further be included.

[0054] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. That is, in the description of this embodiment, the first feature being "above," "above," and "above" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below," "below," or "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0056] Figure 2 is a flow chart of a dehumidification control method according to an embodiment of the present invention. Figure 3 FIG. 1 is a schematic diagram of a control system corresponding to a dehumidification control method according to an embodiment of the present invention. Figure 2 As shown, in one embodiment, the dehumidification control method includes:

[0057] Step S100, after the dehumidifier starts the dehumidification function, the maximum dehumidification capacity Gmax of each first air state parameter corresponding to different output side air temperatures T2 is obtained according to the first air state parameter of the input side air of the evaporator 1 and the preset relationship table. The relationship table can be obtained through experimental calibration, and the specific process of relationship table calibration includes: controlling the fan 5 to operate at different air volumes under different first air state parameters, detecting and recording the output side air temperature T2 and the maximum dehumidification capacity Gmax of the output side air of the evaporator 1 under each first air state parameter and air volume. All experimental data are organized into a data table, as shown in Table 1. The relationship table records the correspondence between the first air state parameter, the output side air temperature T2 of the output side air of the evaporator 1, the maximum dehumidification capacity Gmax and the air volume (see Table 1 below). The first air state parameter here may include the input side air temperature T1 and the input side air relative humidity Rh. As Figure 3 As shown, the dehumidification system of the dehumidifier includes a compressor 2, an evaporator 1, a capillary tube 3 and a condenser 4 connected in sequence. A fan 5 is provided downstream of the condenser 4 to deliver the airflow from the evaporator 1 to the condenser 4. A first temperature sensor 10 and a humidity sensor 20 are provided on the air input side of the evaporator 1, which are respectively used to detect the input side air temperature T1 (dry bulb temperature) and the input side air relative humidity Rh. A second temperature sensor 30 is provided on the air output side of the evaporator 1, which is used to detect the output side air temperature T2.

[0058] Table 1

[0059]

[0060] In step S200, the maximum value of the maximum dehumidification capacities Gmax corresponding to different output air temperatures T2 of the first air state parameter is selected as the first dehumidification capacity G1. In a specific embodiment, assuming that the current first air state parameter is "Outdoor Environmental State 3" in Table 1, the maximum dehumidification capacities Gmax corresponding to different output air temperatures T2 are the values ​​in the last four columns of Table 1. The maximum value is selected as 8 (i.e., the first dehumidification capacity G1), and the corresponding output air temperature T2 is C.

[0061] Step S300: Determine the corresponding first air volume Q1 based on the first air state parameter, the first dehumidification capacity G1, and the relationship table. Continuing with "outdoor environment state 3" in Table 1 as an example, the first dehumidification capacity G1 is 8, and the corresponding air volume is e, which is the first air volume Q1.

[0062] Step S400: Control the fan 5 of the dehumidifier to output air according to the first air volume Q1.

[0063] This embodiment obtains the corresponding relationship between the ambient air parameters (i.e., the first air state parameters), the output side air temperature T2 of the output side air of the evaporator 1, the maximum dehumidification capacity Gmax and the air volume in advance. After the dehumidifier starts the dehumidification function, the corresponding maximum dehumidification capacities Gmax are searched according to the current ambient air parameters and the maximum value among them is used as the first dehumidification capacity G1. The output of the fan 5 is controlled according to the first air volume Q1 corresponding to the first dehumidification capacity G1, so that the dehumidifier adjusts the appropriate air volume to ensure the maximum dehumidification capacity, that is, the fastest dehumidification.

[0064] Furthermore, the control process described above determines the air volume of fan 5 based on ambient air parameters. This allows the dehumidifier to adjust the air volume in real time according to outdoor air conditions, consistently maintaining maximum dehumidification. Compared to existing methods that simply increase air volume to ensure maximum dehumidification capacity Gmax, this solution saves energy, improves energy efficiency, and achieves higher dehumidification efficiency and more accurate control. Variable air volume adjustment improves user comfort and enhances the user experience.

[0065] Figure 4 FIG. 1 is a flow chart of a dehumidification control method according to another embodiment of the present invention. Figure 4 As shown, after step S400, the following steps are further included:

[0066] Step S500: Detect the actual air temperature (i.e. T2) at the output side of the evaporator 1. Figure 3 The second temperature sensor 30 in the temperature sensor is used for measurement.

[0067] Step S600, determine whether the measured air temperature (dry bulb temperature) is less than or equal to the frost reference temperature T0 (usually 0°C) of the evaporator 1. If so, proceed to step S710.

[0068] In step S710, the maximum dehumidification capacity Gmax closest to the first dehumidification capacity G1 among the candidate dehumidification capacities is selected from the relationship table as the second dehumidification capacity G2, and the second air volume Q2 corresponding to the second dehumidification capacity G2 is searched. The candidate dehumidification capacities are the maximum dehumidification capacities Gmax corresponding to the first air state parameter that satisfies the requirement that the output air temperature T2 is greater than the frost reference temperature T0. Again, using the example of "Outdoor Ambient State 3" in Table 1 as the first air state parameter, if the output air temperature T2 is greater than the frost reference temperature T0, the dehumidification capacity closest to the maximum dehumidification capacity Gmax8 is searched from the last four columns of Table 1. In this case, the second dehumidification capacity G2 is determined to be 6, and the corresponding second air volume Q2 is a.

[0069] Step S800: Control the fan 5 to output air according to the second air volume Q2.

[0070] In this embodiment, after the fan 5 operates at the air volume corresponding to the maximum dehumidification capacity Gmax under the current ambient air conditions, if it is detected that the measured air temperature on the output side of the evaporator 1 is less than or equal to the frost reference temperature T0, it indicates that the evaporator 1 is at risk of frost. At this time, the second dehumidification capacity G2 closest to the first dehumidification capacity G1 is searched, that is, the dehumidification capacity is appropriately reduced, and the fan 5 is controlled to operate at the second air volume Q2 corresponding to the second dehumidification capacity G2. In this way, the maximum dehumidification capacity Gmax can be guaranteed while preventing the evaporator 1 from frosting.

[0071] Furthermore, after step S600, the following steps are further included:

[0072] In step S750 , when the measured air temperature is greater than the frost reference temperature T0 of the evaporator 1 , the fan 5 is controlled to continue outputting air at the first air volume Q1 .

[0073] It should be noted that the maximum dehumidification capacity Gmax shown in Table 1 is only a schematic value. The values ​​recorded in actual experiments are likely to contain decimal points. Therefore, the maximum value can be determined by comparing the values. Of course, to prevent the occurrence of multiple maximum values ​​in extreme cases, the dehumidification control method can further include the following steps.

[0074] like Figure 4 As shown, in a further embodiment, step S710 includes:

[0075] Step S720, determine whether there are multiple second dehumidification capacities G2, if so, proceed to step S730, otherwise, execute step S800.

[0076] In step S730 , the second air volumes Q2 corresponding to each second dehumidification capacity G2 are compared and the minimum value is selected.

[0077] Step S740: Control the fan 5 to output air according to the minimum value of all second air volumes Q2.

[0078] Since there may be multiple maximum dehumidification capacities Gmax (i.e., second dehumidification capacities G2) that are closest to the first dehumidification capacities among the alternative dehumidification capacities, the final output air volume of the fan 5 can be determined based on the size of the second air volume Q2 corresponding to each second dehumidification capacities G2. This embodiment uses the minimum value of each second air volume Q2 as the final output air volume of the fan 5, which can effectively save energy consumption while still ensuring the maximum dehumidification capacity.

[0079] Of course, when selecting the first dehumidification capacity G1, there may be a situation where there are multiple first dehumidification capacities G1 at the same time. At this time, the maximum dehumidification capacity Gmax corresponding to the minimum air volume can also be selected as the first dehumidification capacity G1 to save energy consumption.

[0080] In a further embodiment, Figure 4 As shown, after step S800, the following steps are further included:

[0081] Step S910: query the relationship table according to the second air volume Q2 to obtain the corresponding output side air temperature T2.

[0082] Step S920, determine whether the difference between the output side air temperature T2 and the frost reference temperature T0 is less than the preset value A. If so, return to the step of detecting the actual air temperature (i.e., step S500) after the fan 5 runs for the preset time t, until the actual air temperature is less than or equal to the frost reference temperature T0 of the evaporator 1; otherwise, end the process.

[0083] Since the second air volume Q2 is selected after the measured air temperature is less than or equal to the frost reference temperature T0 of the evaporator 1, the evaporator 1 may have been partially frosted or in a critical frosting state, and the selection of the second air volume Q2 is determined based on the second dehumidification amount G2 which is closest to the first dehumidification amount. Although the output side air temperature T2 corresponding to the second dehumidification amount G2 is greater than the frost reference temperature T0, if the difference between the output side air temperature T2 and the frost reference temperature T0 is very small, that is, the output side air temperature T2 may be relatively close to the frost reference temperature T0, at this time, the evaporator 1 still has a certain risk of frost. Therefore, after the fan 5 is running at the second air volume Q2, the measured air temperature on the output side of the evaporator 1 is detected again, and whether the evaporator 1 is frosted can be accurately determined. If the measured air temperature is still detected to be less than or equal to the frost reference temperature T0, continue to execute the steps after step S500, select the third dehumidification amount closest to the second dehumidification amount G2, and reduce the dehumidification amount again to prevent the evaporator 1 from frosting.

[0084] In one embodiment, before step S100, the following steps are included:

[0085] The input side air temperature T1 and the input side air relative humidity Rh are detected, for example, by a first temperature sensor 10 and a humidity sensor 20 .

[0086] Determine whether the relative humidity Rh of the input air is greater than a preset relative humidity threshold; if so, control the dehumidifier to start the dehumidification function, otherwise return to the step of detecting the input air temperature T1 and the input air relative humidity Rh.

[0087] Figure 54 is a connection block diagram of a control system according to an embodiment of the present invention. The present invention also provides a control system, including a controller 40, the controller 40 including a memory 41 and a processor 42, the memory 41 storing a control program 411, and the control program 411, when executed by the processor 42, is used to implement the dehumidification control method in any one of the above embodiments or combinations of embodiments. The processor 42 can be a central processing unit (CPU), a digital processing unit, etc. The processor 42 sends and receives data through a communication interface. The memory 41 is used to store the program executed by the processor 42. The memory 41 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, and can also be a combination of multiple memories 41. The above control program 411 can be downloaded from a computer-readable storage medium to a corresponding computing / processing device or downloaded to a computer or external storage device via a network (such as the Internet, a local area network, a wide area network, and / or a wireless network).

[0088] This embodiment obtains the corresponding relationship between the ambient air parameters (i.e., the first air state parameters), the output side air temperature T2 of the output side air of the evaporator 1, the maximum dehumidification capacity Gmax and the air volume in advance. After the dehumidifier starts the dehumidification function, the corresponding maximum dehumidification capacities Gmax are searched according to the current ambient air parameters and the maximum value among them is used as the first dehumidification capacity G1. The output of the fan 5 is controlled according to the first air volume Q1 corresponding to the first dehumidification capacity G1, so that the dehumidifier adjusts the appropriate air volume to ensure the maximum dehumidification capacity, that is, the fastest dehumidification.

[0089] Furthermore, the control process described above determines the air volume of fan 5 based on ambient air parameters. This allows the dehumidifier to adjust the air volume in real time according to outdoor air conditions, consistently maintaining maximum dehumidification. Compared to existing methods that simply increase air volume to ensure maximum dehumidification capacity Gmax, this solution saves energy, improves energy efficiency, and achieves higher dehumidification efficiency and more accurate control. Variable air volume adjustment improves user comfort and enhances the user experience.

[0090] Furthermore, if Figure 3 As shown, the control system further includes a first temperature sensor 10, a humidity sensor 20, and a second temperature sensor 30. The first temperature sensor 10 and the humidity sensor 20 are both located on the air input side of the evaporator 1, and are used to detect the input air temperature T1 and the input air relative humidity Rh, respectively. The second temperature sensor 30 is located on the air output side of the evaporator 1, and is used to detect the output air temperature T2.

[0091] The present invention also provides a dehumidifier, comprising the control system of any one of the above embodiments or combinations of embodiments.

[0092] The dehumidifier obtains the ambient air parameters (i.e., the first air state parameters), the output side air temperature T2 of the output side air of the evaporator 1, the correspondence between the maximum dehumidification capacity Gmax and the air volume in advance. After the dehumidifier starts the dehumidification function, it searches for the corresponding maximum dehumidification capacities Gmax according to the current ambient air parameters and uses the maximum value among them as the first dehumidification capacity G1. The output of the fan 5 is controlled according to the first air volume Q1 corresponding to the first dehumidification capacity G1, so that the dehumidifier adjusts the appropriate air volume to ensure the maximum dehumidification capacity, that is, the fastest dehumidification.

[0093] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A dehumidification control method, characterized in that: include: After the dehumidifier starts the dehumidification function, the maximum dehumidification amounts corresponding to different output-side air temperatures of the first air state parameter are obtained based on a first air state parameter of the input-side air of the evaporator and a preset relationship table, wherein the relationship table records a correspondence between the first air state parameter, the output-side air temperature of the output-side air of the evaporator, the maximum dehumidification amount, and the air volume; selecting a maximum value among the maximum dehumidification capacities corresponding to different output-side air temperatures of the first air state parameter as a first dehumidification capacity; determining a corresponding first air volume according to the first air state parameter, the first dehumidification amount, and the relationship table; controlling the fan of the dehumidifier to output air according to the first air volume; After the step of controlling the fan of the dehumidifier to output air according to the first air volume, the method further includes: detecting the measured air temperature at the output side of the evaporator; determining whether the measured air temperature is less than or equal to a frosting reference temperature of the evaporator; If so, the maximum dehumidification capacity closest to the first dehumidification capacity among the candidate dehumidification capacities in the relationship table is selected as the second dehumidification capacity, and a second air volume corresponding to the second dehumidification capacity is searched, wherein the candidate dehumidification capacity is the maximum dehumidification capacity corresponding to the first air state parameter that satisfies the requirement that the output side air temperature is greater than the frosting reference temperature; The fan is controlled to output air at the second air volume.

2. The dehumidification control method according to claim 1, characterized in that: After selecting the maximum dehumidification capacity closest to the first dehumidification capacity from among the candidate dehumidification capacities in the relationship table as the second dehumidification capacity and searching for the second air volume corresponding to the second dehumidification capacity, the method further includes: If there are multiple second dehumidification capacities, the second air volumes corresponding to each second dehumidification capacity are compared and the minimum value is selected to control the fan to output according to the minimum value of all the second air volumes.

3. The dehumidification control method according to claim 2, characterized in that: After the step of controlling the fan to output air at the second air volume, the method further includes: querying the relationship table according to the second air volume to obtain the corresponding output side air temperature; Determining whether the difference between the output side air temperature and the frosting reference temperature is less than a preset value; If so, the process returns to the step of detecting the measured air temperature after the fan runs for a preset time, until the measured air temperature is less than or equal to the frosting reference temperature of the evaporator.

4. The dehumidification control method according to claim 3, characterized in that: After the step of determining whether the measured air temperature is less than or equal to the frosting reference temperature of the evaporator, the method further includes: If not, the fan is controlled to continue outputting air at the first air volume.

5. The dehumidification control method according to any one of claims 1 to 4, characterized in that: The first air state parameter includes input side air temperature and input side air relative humidity.

6. The dehumidification control method according to claim 5, characterized in that: After the dehumidifier starts the dehumidification function, the step of obtaining a first dehumidification amount and a first air volume corresponding to the current air environment according to a first air state parameter of the air at the input side of the evaporator and a preset relationship table includes: detecting the input side air temperature and the input side air relative humidity; Determining whether the relative humidity of the air at the input side is greater than a preset relative humidity threshold; If so, control the dehumidifier to start the dehumidification function.

7. A control system, comprising a controller, the controller comprising a memory and a processor, the memory storing a control program, the control program being used to implement the dehumidification control method according to any one of claims 1 to 6 when executed by the processor.

8. The control system according to claim 7, characterized in that: Also includes: The first temperature sensor and the humidity sensor are both arranged on the air input side of the evaporator, and are used to detect the input side air temperature and the input side air relative humidity respectively; The second temperature sensor is arranged at the air output side of the evaporator and is used to detect the air temperature at the output side.

9. A dehumidifier, characterized in that: Includes the control system according to claim 7 or 8.

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