CN110748972A - Humidifying device, air conditioner and control method of air conditioner - Google Patents

Abstract

The invention provides a humidification device, an air conditioner and a control method of the air conditioner. The humidification device includes a fan part; the humidification part is integrally arranged with the fan part, and the humidification part is located in the air outlet direction or the air inlet direction of the fan part, so that the humidification part can humidify the airflow passing through the fan part. By arranging the humidification part and the fan part into an integrated structure, the installation space required for the whole fan part and the humidification part can be effectively reduced. The humidification device with this structure can introduce fresh air into the room through the fan part, and can also prevent The fresh air is humidified, which effectively avoids the problem of large indoor energy consumption caused by the need to use a humidifier alone to humidify the indoor air during the use of the air conditioner. The humidifying device adopted has the advantages of simple structure, low energy consumption and good practicability.

Description

Humidifying device, air conditioner and air conditioner control method

technical field

The present invention relates to the technical field of air conditioners, and in particular, to a humidification device, an air conditioner, and a control method for the air conditioner.

Background technique

Simply using air conditioners for refrigeration has the problem of high energy efficiency. If natural conditions can be used, and in some cases, the combination of air conditioners and ventilation or the combination of air conditioners and ventilation and humidification can achieve the purpose of energy saving and improve indoor air quality . In the prior art, the room is humidified by a spray device, which has a complicated structure, and the system only has the function of ventilation and humidification. The prior art also discloses the use of air-conditioning condensed water to humidify the room and spray the outdoor condenser at the same time, but this method cannot introduce outdoor fresh air, and the energy saving effect is not good.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a humidification device, an air conditioner and a control method for the air conditioner, so as to solve the problem of high energy consumption of the air conditioner system in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a humidification device is provided, comprising: a fan unit; , so that the humidification part can humidify the airflow passing through the fan part.

Further, the humidifying device includes: a bracket; a shell, the shell is connected with the bracket, a first accommodating cavity and a second accommodating cavity that communicate with each other are enclosed between the shell and the bracket, the surface of the shell is provided with an air outlet, and the fan part is arranged on the In the first accommodating cavity, the humidifying part is arranged in the second accommodating cavity.

Further, the humidifying part includes: a wet film, the wet film is arranged in the second accommodating cavity, and the wet film covers the entire air outlet.

Further, a water storage tank is formed at the bottom of the second accommodating cavity, and part of the wet film is located in the water storage tank.

Further, a spray water groove is formed on the top of the second accommodating cavity, and part of the wet film is located in the spray water groove.

Further, the humidification part also includes: a water injection pipe, the water injection pipe is arranged in the spray water tank or the water storage tank, the water injection pipe is communicated with the external water source, and/or the overflow pipe, the overflow pipe is arranged in the water storage tank, and the overflow pipe is used for the water storage tank. The water in the water storage tank is discharged out of the second accommodating chamber.

Further, a water receiving tray is arranged in the second accommodating cavity.

Further, there are a plurality of wet films, the plurality of wet films are strip-shaped structures, each wet film is rotatably arranged, each wet film is connected by a connecting rod, and the plurality of wet films has a humidifying position when the air outlet is full, And the plurality of wet films have escape positions for avoiding the airflow blown out from the fan unit side.

Further, a water storage tank is formed at the bottom of the second accommodating cavity, the humidification part includes an ultrasonic generating device, and the ultrasonic generating device is arranged in the water storage tank.

Further, the bottom of the spray water tank is provided with a plurality of spray holes.

According to another aspect of the present invention, an air conditioner is provided, comprising a humidifying device, and the humidifying device is the above-mentioned humidifying device.

According to another aspect of the present invention, a method for controlling an air conditioner is provided. The method is used to control the above air conditioner. The method includes the following steps: periodically acquiring a preset temperature T, an outdoor temperature T, and an outdoor relative humidity. RH outside, indoor temperature T inside and indoor relative humidity inside RH; according to T outside and RH outside determine the outdoor air enthalpy value IH outside, according to T inside and RH inside determine the indoor air enthalpy value IH inside, when IH outside < IH inside, T When outside < inside T, start the fan unit to conduct mechanical ventilation to introduce outdoor fresh air into the room for the first preset time, when outside IH ≥ inside IH, turn on the compressor of the air-conditioning system, and control the air-conditioning system to select the heating mode according to the T setting Or run the cooling mode for a second preset time.

Further, the method further includes the following steps: when outside IH < inside IH and outside T ≥ inside T, start the humidifying part to inject water into the water storage tank, and close the humidifying part until the RH reaches a preset value, or, when When outside IH < inside IH, and outside T ≥ inside T, open the humidifying part to inject water into the water storage tank and the spray water tank.

Further, the method further includes the following steps: obtaining the concentration of carbon dioxide, the concentration of formaldehyde, the concentration detection value of at least one of PM10 or PM2.5 in the room, and when the concentration detection value exceeds a preset value, start the fan part to carry out mechanical operation. ventilation.

Further, the method further includes the following steps: when the RH is less than the preset value, starting the fan part and the humidifying part.

Further, when the fan unit is started to perform mechanical ventilation, the wet film of the humidification unit is located at the avoidance position, or when the RH is less than the preset value, the wet film is covered with the air outlet and is located at the humidification position.

By applying the technical solution of the present invention, by arranging the humidification part and the fan part into an integrated structure, the installation space required for the entire fan part and the humidification part can be effectively reduced. When the fresh air is introduced, the fresh air can be humidified, which effectively avoids the problem of large indoor energy consumption caused by the need to use a humidifying device alone to humidify the indoor air during the use of the air conditioner. The humidifying device adopted has the advantages of simple structure, low energy consumption and good practicability.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 shows a schematic structural diagram of a first embodiment of a humidifying device according to the present invention;

FIG. 2 shows a schematic structural diagram of a second embodiment of a humidifying device according to the present invention;

FIG. 3 shows a schematic structural diagram of a third embodiment of a humidifying device according to the present invention;

FIG. 4 shows a schematic structural diagram of a fourth embodiment of a humidifying device according to the present invention;

FIG. 5 shows a schematic structural diagram of a fifth embodiment of a humidifying device according to the present invention;

FIG. 6 shows a schematic structural diagram of a sixth embodiment of a humidifying device according to the present invention;

FIG. 7 shows a schematic structural diagram of an embodiment of a spray water tank according to the present invention;

FIG. 8 shows a logic control flow chart of an embodiment of the control method of the air conditioner according to the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

10. Fan section; 11. Motor; 12. Fan blade;

20, humidification part; 21, wet film; 22, water injection pipe; 23, overflow pipe; 24, water injection valve;

30. Bracket;

40. Shell;

51. The first accommodating cavity; 52, the second accommodating cavity; 521, the water storage tank; 522, the spray water tank;

60. Water receiving tray; 70. Ultrasonic generating device.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those of ordinary skill in the art, and in the accompanying drawings, which may be exaggerated for the sake of clarity The thicknesses of layers and regions are described, and the same reference numerals are used to denote the same devices, and thus their descriptions will be omitted.

1 to 8, according to an embodiment of the present invention, a humidification device is provided.

Specifically, the humidifying device includes a fan unit 10 and a humidifying unit 20 . The humidifying part 20 and the fan part 10 are integrally provided, and the humidifying part 20 is located in the air outlet direction or the air inlet direction of the fan part 10 , so that the humidifying part 20 can humidify the airflow blown out by the fan part 10 .

In this embodiment, by arranging the humidification part and the fan part into an integrated structure, the installation space required for the entire fan part and the humidification part can be effectively reduced, and the humidification device with this structure can be introduced into the room through the fan part. At the same time as the fresh air, the fresh air can be humidified, which effectively avoids the problem of large indoor energy consumption caused by the need to use a humidifying device alone to humidify the indoor air during the use of the air conditioner. The humidifying device adopted has the advantages of simple structure, low energy consumption and good practicability. As shown in FIG. 1 , the humidifying part 20 is located on the windward side of the fan part, that is, the air inlet direction of the fan part.

Wherein, the humidifying device includes a bracket 30 and a casing 40 . The shell 40 is connected with the bracket 30 , and a first accommodating cavity 51 and a second accommodating cavity 52 are formed between the shell 40 and the bracket 30 . The surface of the casing 40 is provided with an air outlet, the fan part 10 is arranged in the first accommodating cavity 51 , and the humidifying part 20 is arranged in the second accommodating cavity 52 . This arrangement can effectively reduce the volume of the entire humidifying device, make the humidifying device more compact, and improve the practicability and reliability of the humidifying device.

Specifically, the humidifying part 20 includes a wet film 21 . The wet film 21 is arranged in the second accommodating cavity 52 , and the wet film 21 covers the entire air outlet. This arrangement can improve the efficiency of humidifying the air flow entering the fan unit by the humidifying unit 20 .

In this embodiment, a water storage tank 521 is formed at the bottom of the second accommodating cavity 52 , and a part of the wet film 21 is located in the water storage tank 521 . This arrangement enables the wet film 21 to absorb the water in the water storage tank 521 on the wet film through the siphon principle, so that the air can be humidified when the airflow passes through the wet film.

Further, a spray water groove 522 is formed on the top of the second accommodating cavity 52 . Part of the wet film 21 is located in the shower tank 522 . With this arrangement, cooling water can be sprayed into the spray water tank 522, so as to achieve the purpose of providing a sufficient water source for the wet film.

The humidifying part also includes a water injection pipe 22 and a water overflow pipe 23 . The water injection pipe 22 is arranged in the spray water tank 522 or the water storage tank 521, and the water injection pipe 22 is communicated with the external water source to provide water source for the wet film. The overflow pipe 23 is disposed in the water storage tank 521 , and the overflow pipe 23 is used to discharge the water in the water storage tank 521 out of the second accommodating cavity 52 .

As shown in FIG. 1 , a water receiving tray 60 is disposed in the second accommodating cavity 52 . In this way, the water generated in the humidification part can be collected and then discharged out of the humidification device through the overflow pipe 23, or it can be reused through the circulation pump.

Further, the number of wet films 21 is plural. The plurality of wet films 21 are strip-shaped structures, each wet film 21 is rotatably arranged, each wet film 21 is connected by a connecting rod, the plurality of wet films 21 have a humidifying position when the air outlet is filled, and a plurality of wet films 21 are provided. 21 has an escape position that escapes the airflow blown out from the fan unit 10 side. This arrangement can further improve the practicability of the humidification device. When it is necessary to humidify the room, a driver is provided to control the driver to drive the connecting rod to drive the plurality of wet films 21 to the humidification position. When humidification is not required, only fresh air is required. When the driving part is controlled by the controller, the wet film is driven to the avoidance position, which can reduce the wind resistance of the fresh air entering the room.

According to another embodiment of the present application, a water storage tank 521 is formed at the bottom of the second accommodating cavity 52 , and the humidifying part 20 includes an ultrasonic generating device 70 , and the ultrasonic generating device 70 is arranged in the water storage tank 521 . This arrangement can also achieve the purpose of humidifying the air entering the room.

Preferably, as shown in FIG. 7 , the bottom of the spray water tank 522 is provided with a plurality of spray holes. This arrangement can improve the uniformity of the water sprayed on the wet film and improve the humidification effect.

The humidification device in the above embodiment can also be used in the technical field of humidification equipment, that is, according to another aspect of the present invention, an air conditioner is provided, which includes a humidification device, and the humidification device is the humidification device in the above embodiment.

According to another aspect of the present invention, a method for controlling an air conditioner is provided. The method is used to control the air conditioner in the above implementation. The method includes the following steps: periodically acquiring a preset temperature T, an outdoor temperature T, and an outdoor temperature. Relative humidity RH outside, indoor temperature T inside and indoor relative humidity RH inside; according to T outside and RH outside determine the outdoor air enthalpy value IH outside, according to T inside and RH inside determine the indoor air enthalpy value IH inside, when IH outside < IH inside , when T outside < T inside, start the fan unit 10 to perform mechanical ventilation to introduce outdoor fresh air into the room for the first preset time, when IH outside ≥ IH inside, turn on the compressor of the air-conditioning system, and control the selection of the air-conditioning system according to the T setting The heating mode or the cooling mode operates for a second preset time. When IH outside < IH inside, T outside ≥ T inside, open the humidifying part 20 and inject water into the water storage tank 521 until the RH inside reaches the preset value, then close the humidifying part 20, or, when IH outside < IH inside, T When outside ≥ T inside, the humidifying part 20 is opened and water is injected into the water storage tank 521 and the spray water tank 522 .

The method further includes the following steps: acquiring the concentration detection value of at least one of the concentration of carbon dioxide, the concentration of formaldehyde, and PM10 or PM2.5 in the room, and when the detected concentration value exceeds a preset value, the fan unit 10 is started to perform mechanical ventilation to reduce indoor pollutants. Wherein, when the RH is smaller than the preset value, the fan part 10 and the humidification part 20 are activated. When the fan unit 10 is activated for mechanical ventilation, the wet film 21 of the humidification unit 20 is located in the avoidance position, or when the RH is less than the preset value, the wet film 21 is covered with the air outlet and is located in the humidification position.

Specifically, the use of the air conditioner effectively solves the problem of high energy efficiency of simply using the air conditioner, solves the problem of airtight rooms and poor indoor air quality, and solves the problem that the existing air conditioner cannot adjust the humidity. The purpose of energy saving is achieved, energy efficiency is improved, and indoor air quality is improved by introducing fresh air, and the air conditioner system with humidification function can improve comfort.

The combination of air conditioning, ventilation and indoor humidification, and linkage control, according to the indoor and outdoor working conditions, adopts the control strategy of direct mechanical ventilation or the combined use of ventilation and humidification, which can greatly improve the energy efficiency of the system and achieve the purpose of energy saving. The control strategy can be controlled according to indoor and outdoor enthalpy values, indoor and outdoor temperature, and indoor pollutant concentration and relative humidity. The humidification device and the ventilator are designed in one piece, the structure is simple and reliable, and the function of direct ventilation or indoor humidification can be realized.

The humidification device is provided with a water storage tank or a spray water tank, which can adopt ultrasonic humidification, wet film humidification, spray humidification, and water spray humidification. The system consists of an air conditioner, a ventilator and a humidifying structure.

Air conditioners include, but are not limited to, wall-mounted units, cabinet units, window units, wall-mounted units, and multi-connection units. The ventilator is composed of a DC motor 11, a fan blade 12, and a casing, and is installed on a wall or a window. The wind speed and air volume are adjustable, which can send outdoor fresh air into the room. The humidification device and the fan are designed as one.

The air conditioner is combined with ventilation and humidification, and is controlled by linkage. According to the indoor and outdoor working conditions, the control strategy of direct mechanical ventilation or the combined use of ventilation and humidification is adopted. The linkage between the air conditioner and the ventilator can be integrated with the control panel, or through Bluetooth communication, or through WIFI communication.

The control strategy can be based on the comparison of indoor and outdoor enthalpy and temperature. For example, when the outdoor air enthalpy and outdoor temperature are both lower than indoor air, direct mechanical ventilation is used. When the outdoor air enthalpy value is lower than the indoor air temperature and the temperature is higher than the indoor air temperature, water spray humidification is used to reduce the indoor latent heat load; when the outdoor air enthalpy value is higher than the indoor air temperature, the compressor is turned on for cooling. The preferred control process is shown in Figure 8: start the machine, read the user-set temperature (T setting), outdoor temperature (outside T), outdoor relative humidity (outside RH), indoor temperature (inside T), indoor relative humidity (inside RH) ) and other parameters. Through the built-in program, the outdoor air enthalpy value (outside IH) is calculated according to the outdoor temperature and humidity, and the indoor air enthalpy value (inside IH) is calculated according to the indoor temperature and humidity. If outside IH < inside IH, turn on the compressor for cooling and run according to the compressor control program. If outside IH ≥ inside IH, continue to compare outside T and inside T. If T outside < T inside, turn on the ventilator for mechanical ventilation. If T outside ≥ T inside, open the water injection valve and inject water into the water storage tank or spray pipe/spray box. When the indoor relative humidity reaches the preset value (RH preset), stop water injection. After running in different modes for a preset time (such as 30 minutes), if the user shuts down, the shutdown procedure will be run; if not, it will re-enter the next step after the startup until it shuts down. By utilizing the outdoor fresh air with lower temperature and reducing indoor latent heat by ventilation and humidification, the load of air conditioning and refrigeration can be greatly reduced, the energy efficiency ratio can be improved, and energy saving and environmental protection can be achieved. The introduction of outdoor fresh air can also reduce the concentration of indoor pollutants and improve indoor air quality.

The humidification part and the ventilator are designed as a whole, and the water storage tank scheme or the spray scheme can be adopted. water pipe. When setting the water storage tank, ultrasonic humidification, wet film humidification, spray humidification or water spray humidification can be used. The wet film humidification is shown in Figure 1, and the ultrasonic, spray and water spray humidification is shown in Figure 6. When humidification is required, the water injection valve is opened, and the water storage tank is filled with water. The wet film can absorb water due to the siphon effect. When the wind passes through, the effect of humidification and cooling can be achieved. Ultrasound, spray and water spray directly turn water into fine particles, which enter the room together with ventilation to achieve the effect of humidification and cooling.

When the spray scheme is adopted, the form of wet film humidification can be adopted. The spray water tank is provided with uniform small holes, which can distribute water to the wet film. The wet film can be made of polymer wet film, plant fiber wet film, non-woven wet film, resin material, ceramic material and other materials with good hygroscopic properties. The spray tank can also be replaced by a water pipe with uniform holes.

The water injection valve can be connected to the tap water pipe and is controlled by electric motor. When mechanical ventilation is performed, only the fan unit works, and the water injection valve is not opened. When ventilation and humidification are performed, the water injection valve is opened and water is injected. It can also be used in the form of a water pump to send water from other water tanks to the water injection pipe.

The linkage control strategy of air conditioning, ventilation, and humidification can also be controlled by temperature. For example, in general, compressors are used for cooling. In the case of high temperature and low humidity, humidification is used to cool down. Use direct mechanical ventilation when the outdoor temperature is low (such as at night).

The linkage control strategy can also be controlled by indoor pollutant concentration and indoor relative humidity, such as indoor carbon dioxide concentration, formaldehyde concentration, particulate matter PM10 and PM2.5 exceeding the standard, turn on the fan for mechanical ventilation, when the indoor relative humidity is low (such as When it is lower than 40%), turn on ventilation and humidification. When using wet film humidification, in addition to the above method of directly arranging the wet film, a shutter-type automatic control structure can also be used: the wet film is opened during mechanical ventilation, and the wet film is closed during humidification, which can reduce the resistance during mechanical ventilation.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or Features are included in at least one embodiment generally described in this application. The appearances of the same expression in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure or characteristic is described in conjunction with any one embodiment, it is claimed that implementation of that feature, structure or characteristic in conjunction with other embodiments is also within the scope of the present invention.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (16)

1. a humidification device, is characterized in that, comprises: fan section (10); a humidifying part (20), wherein the humidifying part (20) is integrally provided with the fan part (10), and the humidifying part (20) is located in the air outlet direction or the air inlet direction of the fan part (10), So that the humidifying part (20) can humidify the airflow passing through the fan part (10). 2. The humidifying device according to claim 1, wherein the humidifying device comprises: bracket (30); A casing (40), the casing (40) is connected with the bracket (30), and a first accommodating cavity (51) and a communication between the casing (40) and the bracket (30) are surrounded by In the second accommodating cavity (52), the surface of the casing (40) is provided with an air outlet, the fan part (10) is arranged in the first accommodating cavity (51), and the humidifying part (20) is arranged in the inside the second accommodating cavity (52). 3. The humidifying device according to claim 2, wherein the humidifying part (20) comprises: A wet film (21) is provided in the second accommodating cavity (52), and the wet film (21) covers the entire air outlet. 4. The humidifying device according to claim 3, characterized in that, a water storage tank (521) is formed at the bottom of the second accommodating cavity (52), and a part of the wet film (21) is located in the water storage tank (521) )Inside. 5. The humidifying device according to claim 4, characterized in that a spray water groove (522) is formed on the top of the second accommodating cavity (52), and part of the wet film (21) is located in the spray water groove (522). 6. The humidifying device according to claim 5, wherein the humidifying part further comprises: A water injection pipe (22), the water injection pipe (22) is arranged in the spray water tank (522) or the water storage tank (521), the water injection pipe (22) is communicated with an external water source, and/or An overflow pipe (23), the overflow pipe (23) is arranged in the water storage tank (521), and the overflow pipe (23) is used for discharging the water in the water storage tank (521) to the second storage tank (521) outside the cavity (52). 7 . The humidifying device according to claim 2 , wherein a water receiving tray ( 60 ) is arranged in the second accommodating cavity ( 52 ). 8 . 8. The humidifying device according to claim 3, characterized in that, there are a plurality of wet films (21), the plurality of wet films (21) are strip-shaped structures, and each wet film (21) can be Rotationally arranged, each wet film (21) is connected by a connecting rod, a plurality of the wet films (21) have a humidifying position when the air outlet is filled, and a plurality of the wet films (21) There is an escape position for avoiding the airflow blown out from the side of the fan part (10). 9 . The humidifying device according to claim 2 , wherein a water storage tank ( 521 ) is formed at the bottom of the second accommodating cavity ( 52 ), and the humidifying part ( 20 ) comprises an ultrasonic generating device ( 70 ), so the The ultrasonic generating device (70) is arranged in the water storage tank (521). 10. The humidifier according to claim 5, wherein a plurality of spray holes are opened at the bottom of the spray water tank (522). 11. An air conditioner comprising a humidifying device, wherein the humidifying device is the humidifying device according to any one of claims 1 to 10. 12. A method for controlling an air conditioner, the method being used to control the air conditioner in claim 11, wherein the method comprises the following steps: Periodically obtain the preset temperature T, outside temperature T, outside relative humidity RH, inside temperature T, and inside relative humidity RH; Determine the outdoor air enthalpy value IHout according to T outside and RH outside, determine the indoor air enthalpy value IH according to T inside and RH inside, when IH outside < IH inside, T outside < T inside, start the fan part (10) Perform mechanical ventilation to introduce outdoor fresh air into the room for the first preset time, when outside IH ≥ inside IH, turn on the compressor of the air-conditioning system, and control the air-conditioning system to select heating mode or cooling mode according to the T setting to run for the second preset time . 13. The method according to claim 12, wherein the method further comprises the steps of: When IH outside < IH inside, T outside ≥ T inside, open the humidifying part (20) to inject water into the water storage tank (521), and close the humidifying part (20) until the RH reaches a preset value, or, When IH outside < IH inside, T outside ≥ T inside, the humidifying part (20) is opened to inject water into the water storage tank (521) and the spray water tank (522). 14. The method of claim 12, wherein the method further comprises the steps of: Acquire indoor carbon dioxide concentration, formaldehyde concentration, concentration detection value of at least one of PM10 or PM2.5, when the concentration detection value exceeds a preset value, start the fan part (10) for mechanical ventilation. 15. The method according to claim 12, wherein the method further comprises the steps of: When the RH is less than the preset value, the fan part (10) and the humidification part (20) are activated. 16. The method according to claim 15, characterized in that, when the fan part (10) is started to perform mechanical ventilation, the wet film (21) of the humidification part (20) is located at an avoidance position, or, when the RH is less than In the preset value, the wet film (21) is covered with the air outlet and is located in the humidification position.

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