Control method and device of fresh air equipment, fresh air equipment and storage medium

Abstract

The invention relates to the technical field of fresh air equipment, in particular to a fresh air equipment control method and device, fresh air equipment and a storage medium. When a shutdown instruction is received, current moisture content data and / or historical operation data of the fresh air equipment are / is obtained to judge whether a humidifying film of the fresh air equipment needs to be dried or not; if it is judged that the humidifying film needs to be dried, the fresh air equipment can be controlled to conduct mechanical energy drying on the humidifying film according to the indoor environment parameters and the outdoor environment parameters by controlling the fresh air equipment, so that the situation that the humidifying film is soaked in water for a long time is avoided, and the possibility of bacterium breeding or mildewing and scaling is reduced; the technical problem that in the prior art, after a humidifying film in fresh air equipment runs, water residues exist, and use of the fresh air equipment is affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air equipment, and particularly to a control method, device, fresh air equipment and storage medium for fresh air equipment. Background Art

[0002] In traditional dual-system fresh air equipment, if the user has ever activated the humidification mode and then issues a shutdown command to control the fresh air equipment to shut down, due to the influence of the humidification process on the moisture on the humidification membrane of the fresh air equipment, there may be moisture residue, which may lead to the growth of bacteria due to the long-term immersion of the humidification membrane in water, or mildew and scaling, affecting the quality of the fresh air sent into the room by the fresh air equipment and the health of the user.

[0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main object of the present invention is to provide a control method, device, fresh air equipment and storage medium for fresh air equipment, aiming to solve the technical problem that the humidification membrane in the existing fresh air equipment has moisture residue after operation, affecting the use of the fresh air equipment.

[0005] To achieve the above object, the present invention provides a control method for fresh air equipment, the method comprising the following steps:

[0006] When the fresh air equipment receives a shutdown command, obtain the current moisture content of the environment where the fresh air equipment is located and / or the historical operation data of the fresh air equipment;

[0007] Determine whether the humidification membrane of the fresh air equipment needs to be dried according to the current moisture content and / or the historical operation data; and

[0008] When the humidification membrane needs to be dried, obtain the indoor environmental parameters and the outdoor environmental parameters;

[0009] Control the fresh air equipment to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters.

[0010] Optionally, the fresh air device includes: a fresh air duct, an exhaust air duct, a bypass channel, a heat exchange system, a fresh air fan, an exhaust air fan, a fresh air valve, an exhaust air valve, and a bypass valve. The fresh air duct communicates with the indoor space and the outdoor environment. The heat exchange system includes a compressor, a heat exchanger, an electronic expansion valve, and a condenser. The fresh air fan and the heat exchanger are both arranged in the fresh air duct. The fresh air fan is used to drive outdoor fresh air to be discharged into the indoor space after passing through the heat exchanger. The exhaust air duct communicates with the indoor space and the outdoor environment. The exhaust air fan is arranged in the exhaust air duct. The exhaust air fan is used to drive indoor air to be discharged into the outdoor environment. The fresh air valve is arranged in the fresh air duct and is used to open or close the fresh air duct. The exhaust air valve is arranged in the exhaust air duct and is used to open or close the exhaust air duct. The bypass channel communicates the fresh air duct and the exhaust air duct. The bypass valve is arranged in the bypass channel and is used to open or close the bypass channel. A humidification membrane is also arranged in the fresh air duct. The fresh air duct is also used to dry the humidification membrane through fresh air or return air;

[0011] Controlling the fresh air device to dry the humidification membrane according to the indoor environment parameters and the outdoor environment parameters includes:

[0012] Determining the target circulation mode of the fresh air device according to the indoor environment parameters and the outdoor environment parameters;

[0013] Controlling the fresh air device to operate in the target circulation mode;

[0014] Controlling the operating state of the air supply fan and / or the operating mode and operating state of the heat pump system.

[0015] Optionally, the outdoor environment parameters include the fresh air moisture content, and the indoor environment parameters include the return air moisture content. Determining the target circulation mode of the fresh air device according to the indoor environment parameters and the outdoor environment parameters includes:

[0016] When the fresh air moisture content is greater than the return air moisture content, determining the target circulation mode as the internal circulation mode;

[0017] When the fresh air moisture content is less than or equal to the return air moisture content, determining the target circulation mode as the external circulation mode; or

[0018] The outdoor environment parameters include the fresh air temperature, and the indoor environment parameters include the return air temperature. Determining the target circulation mode of the fresh air device according to the indoor environment parameters and the outdoor environment parameters includes:

[0019] When the fresh air temperature is greater than the return air temperature, determining the target circulation mode as the internal circulation mode;

[0020] When the fresh air temperature is less than or equal to the return air temperature, determine that the target circulation mode is the external circulation mode.

[0021] Optionally, controlling the operating state of the air supply fan and / or the operating mode and state of the heat pump system includes:

[0022] Controlling the air supply fan to operate at a preset speed and / or controlling the heat pump system to operate in heating mode, and controlling the heat pump system to operate at a preset heating power.

[0023] Optionally, the control method of the fresh air device further includes:

[0024] Obtain the moisture content of the incoming air and the moisture content of the supplied air of the fresh air device;

[0025] When the difference between the moisture content of the incoming air and the moisture content of the supplied air is less than the first preset moisture content, stop drying the humidification membrane and shut down; and / or

[0026] When the duration of drying the humidification membrane by the fresh air device is greater than the first preset duration, stop drying the humidification membrane and shut down.

[0027] Optionally, the control method of the fresh air device further includes:

[0028] After drying the humidification membrane for a second preset duration by the fresh air device, obtain the moisture content of the incoming air and the moisture content of the supplied air of the fresh air device;

[0029] Adjust the operating frequency of the compressor in the heat pump system according to the difference between the moisture content of the incoming air and the moisture content of the supplied air.

[0030] Optionally, the control method of the fresh air device further includes:

[0031] After drying the humidification membrane for a third preset duration by the fresh air device, obtain the coil temperature of the indoor heat exchanger of the fresh air device;

[0032] Adjust the speed of the air supply fan according to the coil temperature.

[0033] In addition, to achieve the above object, the present invention also proposes a humidification membrane drying device, and the humidification membrane drying device includes:

[0034] An acquisition module, configured to acquire the current moisture content of the environment where the fresh air device is located and / or the historical operation data of the fresh air device when the fresh air device receives a shutdown instruction;

[0035] A judgment module, configured to determine whether the humidification membrane of the fresh air device needs to be dried according to the current moisture content and / or the historical operation data; and

[0036] The acquisition module is further configured to acquire indoor environmental parameters and outdoor environmental parameters when the humidification membrane needs to be dried.

[0037] The control module is configured to control the fresh air device to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters.

[0038] In addition, to achieve the above object, the present invention also provides a humidification membrane drying device, which includes a memory, a processor, and a humidification membrane drying program stored on the memory and executable on the processor. The humidification membrane drying program is configured to implement the steps of the control method of the fresh air device as described above.

[0039] In addition, to achieve the above object, the present invention also provides a storage medium with a humidification membrane drying program stored thereon. When the humidification membrane drying program is executed by a processor, it implements the steps of the control method of the fresh air device as described above.

[0040] The present invention discloses a control method for a fresh air device. The control method for the fresh air device includes: when the fresh air device receives a shutdown instruction, acquiring the current moisture content of the environment where the fresh air device is located and / or the historical operation data of the fresh air device; determining whether the humidification membrane of the fresh air device needs to be dried according to the current moisture content and / or the historical operation data; and when the humidification membrane needs to be dried, acquiring indoor environmental parameters and outdoor environmental parameters; controlling the fresh air device to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters. Compared with the prior art, the present invention determines whether the humidification membrane of the fresh air device needs to be dried by acquiring the current moisture content data and / or historical operation data of the fresh air device when receiving the shutdown instruction, improving the accuracy of the drying control of the fresh air device. If it is determined that the humidification membrane needs to be dried, the fresh air device can be controlled to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters, so as to avoid the humidification membrane being immersed in water for a long time, reducing the possibility of bacteria breeding or mildew and scale formation, and avoiding the technical problem that there is water residue in the humidification membrane of the fresh air device after operation in the prior art, which affects the use of the fresh air device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic structural diagram of a humidification membrane drying device in the hardware operating environment related to the embodiment of the present invention;

[0042] Figure 2 is a schematic flowchart of the first embodiment of the control method for the fresh air device of the present invention;

[0043] Figure 3 is a schematic structural diagram of a fresh air device in an embodiment of the control method for a fresh air machine of the present invention;

[0044] Figure 4 Another schematic structural diagram of the fresh air equipment in an embodiment of the control method of the fresh air blower of the present invention;

[0045] Figure 5 Schematic flow chart of the second embodiment of the control method of the fresh air equipment of the present invention;

[0046] Figure 6 Schematic flow chart of the second embodiment of the control method of the fresh air equipment of the present invention;

[0047] Figure 7 Block diagram of the structure of the first embodiment of the humidifying film drying device of the present invention.

[0048] Description of reference numerals

[0049] Label Name Label Name 100 Fresh air equipment 10 First heat pump system 20 Second heat pump system 11 First compressor 12 First heat exchange module 13 First fresh air heat exchanger 14 Second fresh air heat exchanger 15 First throttling element 16 Second throttling element 17 Third throttling element 18 First check valve 19 Second check valve 1 Third check valve 2 Fourth check valve 3 Reversing device 4 Air supply channel 5 Exhaust air channel 6 Air supply fan 7 Air supply valve 8 Exhaust fan 9 Exhaust valve 27 Second compressor 21 Second outdoor heat exchanger 22 Third fresh air heat exchanger 23 Fourth fresh air heat exchanger 24 Fourth throttling element 25 Fifth check valve 26 Fifth throttling element 30 By-pass air valve 31 First connection port 32 Second connection port 33 Inlet 34 Outlet 35 First outdoor heat exchanger 36 Heat recovery heat exchanger 37 Outdoor fan

[0050] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0051] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] Refer to Figure 1 , Figure 1 Schematic structural diagram of the humidifying film drying equipment in the hardware operating environment related to the embodiment solution of the present invention.

[0053] As Figure 1 shown, the humidifying film drying equipment may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0054] Those skilled in the art can understand,Figure 1 The structures shown do not constitute a limitation on the humidifying film drying device, and may include more or fewer components than those shown, or combine certain components, or have different component arrangements.

[0055] As Figure 1 shown, the memory 1005, as a storage medium, may include an operating system, a network communication module, a user interface module, and a humidifying film drying program.

[0056] In Figure 1 the humidifying film drying device shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the humidifying film drying device of the present invention may be provided in the humidifying film drying device. The humidifying film drying device calls the humidifying film drying program stored in the memory 1005 through the processor 1001 and executes the control method of the fresh air device provided in the embodiment of the present invention.

[0057] The embodiment of the present invention provides a control method for a fresh air device. Referring to Figure 2 , Figure 2 is a schematic flowchart of the first embodiment of a control method for a fresh air device of the present invention.

[0058] In this embodiment, the control method for the fresh air device includes the following steps:

[0059] Step S10: When the fresh air device receives a shutdown instruction, obtain the current moisture content of the environment where the fresh air device is located and / or the historical operation data of the fresh air device.

[0060] It should be noted that the execution subject of the method in this embodiment may be a device with data acquisition or data processing functions, such as: a control device of an environmental regulation device or a fresh air device provided with a dual heat pump system, or other devices that can achieve the same or similar functions. This embodiment does not make specific limitations in this regard. In this embodiment and the following embodiments, a fresh air device provided with a dual heat pump system will be used as an example for description.

[0061] It is worth noting that the fresh air device with a dual heat pump system in this embodiment and the following embodiments refers to as Figure 3 and Figure 4The fresh air equipment shown, the fresh air equipment 100 includes a housing and a first heat pump system 10. A air supply channel 4 is provided inside the housing. The first heat pump system 10 includes: a fresh air heat exchanger structure and a first switching device. The fresh air heat exchanger structure is located in the air supply channel 4, and the fresh air heat exchanger structure has a refrigerant pipeline. The first switching device is communicated with the fresh air heat exchanger structure, and the first switching device is used to switch the flow direction of the refrigerant in the fresh air heat exchanger structure. In different operating modes of the first heat pump system 10, the refrigerant of the first heat pump system 10 first passes through the refrigerant pipeline located downstream of the air supply channel 4, and then passes through the refrigerant pipeline located upstream of the air supply channel 4. Wherein, the air supply channel 4 refers to the channel through which the fresh air equipment 100 sends outdoor fresh air into the room, and the exhaust air channel 5 refers to the channel through which the fresh air equipment 100 discharges indoor air to the outside. The fresh air heat exchanger structure is arranged in the first refrigerant flow path. The first heat pump system 10 further includes: a first compressor 11, a first heat exchange module 12 and a commutation device 3. The first compressor 11 is arranged in the first refrigerant flow path and has a first exhaust port and a first suction port. The first heat exchange module 12 is arranged in the first refrigerant flow path and communicated with the first switching device. The first heat exchange module 12 includes a first outdoor heat exchanger 35 and a heat recovery heat exchanger 36 arranged in series. The heat recovery heat exchanger 36 is arranged in the exhaust air channel 5, and the first outdoor heat exchanger 35 is arranged outside the housing (main housing). The first compressor 11 is installed in the exhaust air channel 5 or outside the housing (main housing). Thus arranged, the heat recovery heat exchanger 36 is arranged in the exhaust air channel 5. After the air in the exhaust air channel 5 exchanges heat with the heat recovery heat exchanger 36, it is then discharged from the exhaust air channel 5, so that the heat of the air discharged from the exhaust air channel 5 can be recovered. The commutation device 3 communicates with the first exhaust port, the first suction port, the first heat exchange module 12 and the first switching device. The commutation device 3 is used to switch the refrigerant flow direction, so that the refrigerant first passes through the first heat exchange module 12 and then the first switching device, or so that the refrigerant first passes through the first switching device and then passes through the first heat exchange module 12. In order to realize the dehumidification and reheating function of the fresh air equipment 100, the fresh air heat exchanger structure includes a first fresh air heat exchanger 13 and a second fresh air heat exchanger 14 connected in series in sequence. The first fresh air heat exchanger 13 is located downstream of the air supply channel 4 relative to the second fresh air heat exchanger 14. The outlet 34 is connected to the first fresh air heat exchanger 13, and the inlet 33 is connected to the second fresh air heat exchanger 14. Thus arranged, in the dehumidification and reheating mode, the first fresh air heat exchanger 13 acts as an evaporator to cool the air, and the second fresh air heat exchanger 14 acts as a condenser to heat the air, thereby realizing the dehumidification and reheating of the air.In order to reduce the control components in the fresh air device 100 and improve the stability of the fresh air device 100, the first switching device has a first communication port 31, a second communication port 32, an inflow port 33 and an outflow port 34. The fresh air heat exchanger structure communicates the outflow port 34 and the inflow port 33. The first switching device includes: a first check valve 18, a second check valve 19, a third check valve 1 and a fourth check valve 2. The first check valve 18 is connected between the first communication port 31 and the inflow port 33, and the first check valve 18 is conductive in the direction from the inflow port 33 to the first communication port 31. The second check valve 19 is connected between the first communication port 31 and the outflow port 34, and the second check valve 19 is conductive in the direction from the first communication port 31 to the outflow port 34. The third check valve 1 is connected between the inflow port 33 and the second communication port 32, and the third check valve 1 is conductive in the direction from the inflow port 33 to the second communication port 32. The fourth check valve 2 is connected between the outflow port 34 and the second communication port 32, and the fourth check valve 2 is conductive in the direction from the second communication port 32 to the outflow port 34. With such a setting, the first switching device is entirely composed of check valves. Compared with the solutions of a four-way valve or two three-way valves, no control components are required, and the fresh air device 100 has relatively high stability.

[0062] With such a setting, for two heat pump systems, there are two indoor heat exchangers in the fresh air channel (exhaust air channel), and correspondingly two coil temperatures. In the heating mode, the coil temperature of the upstream heat exchanger is higher than that of the downstream heat exchanger. Compared with the solution of single-stage evaporation heating, the energy consumption is greatly increased. However, the upstream heat pump system can preheat or precool the air first, and then heat exchange through the downstream heat pump system. At this time, it can effectively reduce the outlet air temperature in the cooling mode and increase the outlet air temperature in the heating mode.

[0063] The upstream heat exchanger mentioned above refers to the heat exchanger closer to the fresh air inlet (or farther from the air supply outlet). In this embodiment and the following embodiments, it is referred to as the first indoor heat exchanger corresponding to the first heat pump system. The downstream heat exchanger refers to the heat exchanger farther from the fresh air inlet (or closer to the air supply outlet), and is also referred to as the second indoor heat exchanger corresponding to the second heat pump system. This embodiment does not make specific limitations on this.

[0064] Due to the simultaneous presence of the first heat pump system 10 and the second heat pump system 20, it is often necessary to provide two outdoor units for the first heat pump system 10 and the second heat pump system 20. With such an arrangement, the installation of both outdoor units requires two outdoor unit positions, occupying too much space, and the installation workload for the two outdoor units is also relatively large. Therefore, the housing includes a main machine housing and an outdoor unit housing. The main machine housing is provided with the air supply channel 4 and the exhaust air channel 5. The first heat pump system 10 further includes a first compressor 11 and the first heat exchange module 12. The first heat exchange module 12 includes a first outdoor heat exchanger 35 and a heat recovery heat exchanger arranged in series. The heat recovery heat exchanger is arranged in the exhaust air channel 5. The fourth fresh air heat exchanger 23 is arranged in the air supply channel 4. The first compressor 11, the first outdoor heat exchanger 35, the second compressor 27, the second outdoor heat exchanger 21, and the outdoor fan 37 are all arranged in the outdoor unit housing. With such an arrangement, the heat recovery heat exchanger 36 is arranged in the exhaust air channel 5, the fourth fresh air heat exchanger 23 is arranged in the air supply channel 4, the first compressor 11, the first outdoor heat exchanger 35, the second compressor 27, the second outdoor heat exchanger 21, and the outdoor fan 37 are all arranged in the outdoor unit housing. By arranging some components of the outdoor unit in the exhaust air channel 5 and the remaining components in the outdoor unit housing, only one outdoor unit is needed to meet the requirements of the first heat pump system 10 and the second heat pump system 20, reducing the space occupied by the outdoor unit and also reducing the installation workload of the outdoor unit.

[0065] In this embodiment, when the fresh air device operates in the humidification mode, at least one of the first heat pump system and the second heat pump system operates in the heating mode. The indoor-side heat exchanger gradually heats and cools the air, and the heated air then passes through the humidification module. The moisture on the surface of the wet film evaporates to achieve the humidification effect, thereby increasing the humidity of the air supply. However, in the traditional technology, when the fresh air device receives the shutdown command issued by the user and shuts down after power-off, since the humidification module of the humidification is a wet film spraying structure, there may be residual moisture. Before the residual moisture evaporates during the next power-on, it will accumulate, resulting in bacteria breeding or mold and scale formation, etc. Furthermore, when the air is supplied next time, there will be an odor, affecting the user experience.

[0066] To solve the above problems, in this embodiment, by drying the humidification film before the fresh air device shuts down, the residual moisture of the humidification film is reduced, improving the air supply quality of the fresh air device.

[0067] It can be understood that the current moisture content includes, but is not limited to, any one or more of the fresh air moisture content, the supply air moisture content, and the return air moisture content. Among them, the fresh air moisture content can also be replaced by the outdoor environmental moisture content in the area where the fresh air equipment is located. The supply air moisture content refers to the moisture content at the air supply outlet of the fresh air equipment. The return air moisture content can also be replaced by the indoor environmental moisture content in the area where the indoor unit of the fresh air equipment is located. This embodiment does not make specific restrictions on this.

[0068] It should be understood that the historical operation data can be the record log of the historical operation function or the function switching instruction of the user, etc., and can be obtained by querying the Internet of Things database. This embodiment does not make specific restrictions on this. The historical operation data can also include the feedback record of the float switch set in the fresh air equipment. If the float switch feedback indicates that when the fresh air equipment receives the shutdown instruction, the float switch is disconnected (the disconnection of the float switch indicates that the water level in the water receiving tray is greater than or equal to the position of the float switch) or the closing time of the float switch is less than the preset duration (for example, 30 minutes), it indicates that there may be water accumulation in the water receiving tray carrying the humidifying membrane and needs to be dried.

[0069] Step S20: Determine whether the humidifying membrane of the fresh air equipment needs to be dried according to the current moisture content and / or the historical operation data.

[0070] In one embodiment, the determining whether the humidifying membrane of the fresh air equipment needs to be dried according to the current moisture content and / or the historical operation data includes:

[0071] When the fresh air equipment has turned on the humidifying mode, the difference between the supply air moisture content and the fresh air moisture content is greater than the preset moisture content threshold, the float switch is disconnected, or the closing duration of the float switch is greater than the preset duration, it is determined that the fresh air equipment needs to be dried.

[0072] Combined with the record log of the historical operation function or the function switching instruction of the user and the feedback record of the float switch, it is possible to accurately judge whether there is a possibility of water immersion in the humidifying membrane of the fresh air equipment, and then decide whether it is necessary to dry the humidifying membrane.

[0073] Step S30: When the humidifying membrane needs to be dried, obtain the indoor environmental parameters and the outdoor environmental parameters.

[0074] It can be understood that the indoor environmental parameters include, but are not limited to, the return air moisture content and the return air temperature, and the outdoor environmental parameters include, but are not limited to, the fresh air moisture content and the fresh air temperature.

[0075] Step S40: Control the fresh air equipment to dry the humidifying membrane according to the indoor environmental parameters and the outdoor environmental parameters.

[0076] In this embodiment, controlling the fresh air device to dry the humidification film can be achieved by increasing the refrigerant temperature, thereby increasing the temperature of the humidification film, and realizing the drying of the humidification film through the evaporation of the heated water vapor. In addition, since the humidification film is arranged in the fresh air passage, the rotation speed of the air supply fan can also be adjusted to accelerate the opening and circulation, thereby accelerating the drying of the moisture on the humidification film. This embodiment does not make specific limitations on this.

[0077] In addition, since the humidification film is arranged in the fresh air passage, the drying efficiency of the humidification film is affected not only by the air volume and temperature, but also by the moisture content of the circulating air. If the air is relatively dry, the drying efficiency is higher; if the air is relatively humid, the drying effect is lower. When the fresh air device is in the external circulation mode or the internal circulation mode, the sources of the circulating air are different.

[0078] Therefore, in this embodiment, the inlet air source of the air supply duct can be controlled by the indoor environmental parameters and the outdoor environmental parameters. Specifically, it is realized by adjusting the fresh air device to operate in the internal circulation mode to achieve the circulation of the indoor air, or operating in the external circulation mode to achieve the drying of the outdoor air.

[0079] In the specific implementation process, if the difference between the fresh air / supply air moisture content is less than the preset value or the drying function has been cumulatively operated for a certain period of time, the drying function is exited. During this process, if the user turns on the machine, it enters the user selection mode for operation.

[0080] Further, the control method of the fresh air device further includes:

[0081] Obtain the inlet air moisture content and the supply air moisture content of the fresh air device;

[0082] When the difference between the inlet air moisture content and the supply air moisture content is less than the first preset moisture content, stop drying the humidification film and shut down the machine; and / or

[0083] When the duration of drying the humidification film by the fresh air device is greater than the first preset duration, stop drying the humidification film and shut down the machine.

[0084] In the specific implementation, if there is no residual moisture on the humidification film, after the outdoor air exchanges heat with the heat exchanger through the fresh air inlet, it is output to the indoor environment through the air supply outlet, realizing the temperature control of the indoor environment. During this process, the moisture content of the air at the fresh air inlet and the air supply outlet is similar and will not change significantly. Therefore, it is possible to determine whether there is residual moisture on the humidification film based on the difference between the fresh air moisture content and the supply air moisture content.

[0085] It should be noted that the moisture content of the incoming air includes the moisture content of the fresh air and the return air. When the fresh air equipment operates in the internal circulation mode, the air inlet is the return air outlet. The difference between the moisture content of the return air and the moisture content of the supply air can be used to determine whether there is residual moisture in the humidification membrane. Similarly, when the fresh air equipment operates in the external circulation mode, the air inlet is the fresh air inlet, and the difference between the moisture content of the fresh air and the moisture content of the supply air can be used to determine whether there is residual moisture in the humidification membrane.

[0086] It can be understood that when the difference between the moisture content of the incoming air and the moisture content of the supply air is less than a certain threshold value, it means that there is no increase in moisture in the fresh air or the return air in the air duct, that is, there is no residual moisture in the humidification membrane and no drying is required. In addition, if the drying time is relatively long, in order to avoid damaging the equipment components, the drying of the humidification membrane can also be stopped and the machine can be shut down.

[0087] In this embodiment, by obtaining the current moisture content data and / or historical operation data of the fresh air equipment to determine whether the humidification membrane of the fresh air equipment needs to be dried, the accuracy of the drying control of the fresh air equipment is improved. If it is determined that the humidification membrane needs to be dried, the fresh air equipment can be controlled to mechanically dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters, so as to avoid the humidification membrane being immersed in water for a long time, reduce the possibility of bacteria breeding or mildew and scaling, and avoid the technical problem that the humidification membrane in the existing fresh air equipment has residual moisture after operation, affecting the use of the fresh air equipment.

[0088] Reference Figure 5 , Figure 5 is a schematic flow chart of the second embodiment of the control method of a fresh air equipment of the present invention.

[0089] Based on the above first embodiment, in this embodiment, the step S30 includes:

[0090] Step S401: Determine the target circulation mode of the fresh air equipment according to the indoor environmental parameters and the outdoor environmental parameters.

[0091] In this embodiment, the indoor environmental parameters include but are not limited to the moisture content of the return air and the return air temperature, the outdoor environmental parameters include but are not limited to the moisture content of the fresh air and the fresh air temperature, and the target circulation mode of the fresh air equipment includes the internal circulation mode and the external circulation mode. Among them, when the indoor environmental parameters are more conducive to drying the humidification membrane, the fresh air equipment is controlled to operate in the internal circulation mode; when the outdoor environmental parameters are more conducive to drying the humidification membrane, the fresh air equipment is controlled to operate in the external circulation mode.

[0092] Further, the outdoor environmental parameters include the moisture content of the fresh air, the indoor environmental parameters include the moisture content of the return air, and determining the target circulation mode of the fresh air equipment according to the indoor environmental parameters and the outdoor environmental parameters includes:

[0093] When the moisture content of the fresh air is greater than that of the return air, determine that the target circulation mode is the internal circulation mode;

[0094] When the moisture content of the fresh air is less than or equal to that of the return air, determine that the target circulation mode is the external circulation mode; or

[0095] The outdoor environmental parameters include the fresh air temperature, and the indoor environmental parameters include the return air temperature. Determining the target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters includes:

[0096] When the fresh air temperature is greater than the return air temperature, determine that the target circulation mode is the internal circulation mode;

[0097] When the fresh air temperature is less than or equal to the return air temperature, determine that the target circulation mode is the external circulation mode.

[0098] In a specific implementation, since the air extracted from the return air outlet is the indoor air and can represent the indoor humidity, and the air extracted from the fresh air inlet is the outdoor air and can represent the outdoor humidity, in this embodiment, by comparing the moisture content of the return air and the fresh air, or comparing the return air temperature and the fresh air temperature, it can be judged which mode is more conducive to drying the humidification membrane. If the indoor air humidity content is high, the external circulation mode is operated, and the humidification membrane is dried by the relatively dry outdoor side air; similarly, if the outdoor air humidity content is high, the internal circulation mode is operated.

[0099] Considering the operating scenario of the fresh air device, there may be a temperature difference between indoors and outdoors. As analyzed above, the factors affecting the drying rate of the humidification membrane are: air volume, temperature, and dryness and humidity. Then, if the indoor air temperature is high, drying by extracting indoor air will be more efficient than drying by extracting outdoor air. Therefore, this embodiment can also judge the magnitude relationship between the fresh air temperature and the return air temperature, so as to select the operating mode of the fresh air device and further improve the drying efficiency of the humidification membrane.

[0100] Step S402: Control the fresh air device to operate in the target circulation mode.

[0101] Step S403: Control the operating state of the air supply fan and / or the operating mode and operating state of the heat pump system.

[0102] It should be noted that, as described above, the indoor heat exchanger in this embodiment includes the first indoor heat exchanger in the first heat pump system and the second indoor heat exchanger in the second heat pump system. Due to the difference in the positions of the two heat exchangers, there is a certain difference between the coil temperature of the first indoor heat exchanger relatively close to the fresh air inlet and the coil temperature of the second indoor heat exchanger far from the fresh air inlet. In order to improve the drying efficiency of the humidification film on the premise of energy conservation, the coil temperature in this embodiment and the following embodiments can be the maximum value between the first coil temperature corresponding to the first indoor heat exchanger and the second coil temperature corresponding to the second indoor heat exchanger. This embodiment does not make specific limitations on this.

[0103] It can be understood that due to the influence of the structure of the fresh air equipment, if there is no moisture on the humidification film, there is no large difference in moisture content between the fresh air moisture content and the supply air moisture content during the air supply process. On the contrary, if there is a difference in moisture content between the fresh air moisture content and the supply air moisture content, it means that the air passing through the supply air duct is affected by the residual moisture on the humidification film. Therefore, in this embodiment, the first moisture content difference between the fresh air moisture content and the supply air moisture content is calculated to facilitate subsequent efficient adjustment of the operation of the compressor or the supply air fan of the fresh air equipment and improve the drying effect of the humidification film.

[0104] Furthermore, the control of the operating state of the supply air fan and / or the operating mode and state of the heat pump system includes:

[0105] Controlling the supply air fan to operate at a preset speed and / or controlling the heat pump system to operate in heating mode, and controlling the heat pump system to operate at a preset heating power.

[0106] In specific implementation, the evaporation of moisture on the humidification film is affected by the speed of the supply air fan and the operating mode and state of the heat pump system. Therefore, in this embodiment, the maximum heating capacity can be output, for example, by adjusting the operating frequency of the compressor, the speed of the supply air fan, or the on / off of the fresh air equipment, to dry the humidification film.

[0107] In this embodiment, the target operating mode of the fresh air equipment is adjusted according to the outdoor environmental parameters and the indoor environmental parameters, which improves the efficiency of drying the humidification film and realizes precise control of drying the humidification film in different application scenarios.

[0108] Reference Figure 6 , Figure 6 is a schematic flowchart of the third embodiment of a control method for a fresh air equipment according to the present invention.

[0109] Based on the above second embodiment, in this embodiment, after the step S40, the following is further included:

[0110] Step S50: After the fresh air device dries the humidification membrane for a second preset duration, obtain the moisture content of the incoming air and the moisture content of the outgoing air of the fresh air device.

[0111] Step S60: Adjust the operating frequency of the compressor in the heat pump system according to the difference between the moisture content of the incoming air and the moisture content of the outgoing air.

[0112] It should be noted that since the first moisture content difference between the fresh air moisture content and the outgoing air moisture content to a certain extent represents the moisture residue of the humidification membrane, by adjusting the operating frequency of the compressor, the moisture evaporation can be accelerated. However, the operation of the compressor will cause the temperature rise of each indoor heat exchanger, and then cause the synchronous temperature rise during the air supply process. At the same time, considering that this embodiment is a solution executed in the scenario where the fresh air device is shut down, in order to ensure the user experience, this embodiment can adjust the rotation speed of the air supply fan through the coil temperature to reduce the influence of the indoor heat exchanger temperature rise on the air supply temperature.

[0113] Further, adjusting the operating frequency of the compressor according to the moisture content difference includes:

[0114] When the first moisture content difference is greater than a preset moisture content threshold, increase the operating frequency of the compressor;

[0115] When the first moisture content difference is less than or equal to the preset moisture content threshold, decrease the operating frequency of the compressor.

[0116] In a specific implementation, by setting a threshold of moisture content, when the moisture content difference between the fresh air moisture content and the outgoing air moisture content is greater than this threshold, it indicates that there is a greater possibility of water accumulation; similarly, when the moisture content difference between the fresh air moisture content and the outgoing air moisture content is less than or equal to this threshold, it indicates that there is a smaller possibility of water accumulation. Among them, the value of the moisture content threshold is related to the local air pressure, and this embodiment does not make specific restrictions on this.

[0117] In addition, by comparing the magnitude of the difference at regular intervals, adjust the compressor output frequency according to the change trend or magnitude of the difference: the larger the difference, the more moisture content remains in the wet membrane, and the compressor frequency remains at the current value or is further increased; when the difference is less than a certain value, it indicates that the moisture content in the wet membrane is already small, and according to the interval where the difference is located, the compressor frequency is synchronously decreased.

[0118] In a specific implementation, during the drying process of the wet membrane, all protection frequency limits and frequency reductions of the compressor are effective. When protection shutdown occurs or the heating operation range is exceeded, the compressor stops running, and only the air supply mode is operated for air drying.

[0119] In one embodiment, the control method of the fresh air device further includes:

[0120] After the fresh air device dries the humidification membrane for a third preset duration, obtain the coil temperature of the indoor heat exchanger of the fresh air device;

[0121] Adjust the rotation speed of the air supply fan according to the coil temperature.

[0122] It should be noted that the higher the coil temperature, the higher the temperature of the fresh air sent into the room. To reduce the impact of the fresh air on users, the rotation speed of the air supply fan can be adjusted. When the coil temperature is too high, reduce the rotation speed of the air supply fan to decrease the air supply volume; when the coil temperature is too low, increase the rotation speed of the air supply fan to increase the air supply volume.

[0123] The adjusting the rotation speed of the air supply fan according to the coil temperature includes:

[0124] When the coil temperature is less than the preset temperature, reduce the rotation speed of the air supply fan according to the current rotation speed of the air supply fan and the first rotation speed adjustment strategy;

[0125] When the coil temperature is equal to the preset temperature, keep the rotation speed of the air supply fan unchanged;

[0126] When the coil temperature is greater than the preset temperature, increase the rotation speed of the air supply fan according to the current rotation speed of the air supply fan and the second rotation speed adjustment strategy.

[0127] Reducing the rotation speed of the air supply fan according to the current rotation speed of the air supply fan and the first rotation speed adjustment strategy can be a 10% reduction based on the current rotation speed, that is, each time the rotation speed of the air supply fan is adjusted, it can be reduced to 90% of the current air speed. For example: the current air speed is 2000 revolutions / s, and after adjustment, it is 1800 revolutions / s; increasing the rotation speed of the air supply fan according to the current rotation speed of the air supply fan and the second rotation speed adjustment strategy can also be a 10% increase based on the current rotation speed. For example: the current air speed is 2000 revolutions / s, and after adjustment, it is 2200 revolutions / s. This embodiment does not make specific limitations on this.

[0128] Further, the control method of the fresh air device further includes:

[0129] Obtain the pipeline pressure in the area where the indoor heat exchanger is located;

[0130] Adjust the rotation speed of the air supply fan according to the pipeline pressure.

[0131] As the compressor does work, the refrigerant flowing through the indoor heat exchanger in the air supply duct causes the temperature of the indoor heat exchanger to rise. At the same time, affected by the high-temperature and high-pressure refrigerant, the coil pressure in the area where the indoor heat exchanger is located also rises synchronously. Therefore, in addition to controlling the rotational speed of the air supply fan by detecting the coil temperature, this embodiment can also control the rotational speed of the air supply fan by detecting the pressure value at the coil of the indoor heat exchanger, so that the air supply volume is maintained in an efficient range, ensuring that the hot air for drying the wet film is maintained at a relatively efficient temperature, ensuring that the water in the wet film can be taken away at a relatively fast speed, and at the same time avoiding too high air supply temperature from affecting the user experience.

[0132] In this embodiment, by adjusting the operating frequency of the compressor, the rotational speed of the air supply fan, and the air circulation mode of the fresh air device, the efficiency of drying the humidification film is improved, and precise control of drying the humidification film is achieved in different application scenarios.

[0133] In addition, an embodiment of the present invention also provides a storage medium, on which a humidification film drying program is stored. When the humidification film drying program is executed by a processor, the steps of the control method of the fresh air device as described above are implemented.

[0134] Since this storage medium adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here.

[0135] Refer to Figure 7 , Figure 7 which is the structural block diagram of the first embodiment of the humidification film drying device of the present invention.

[0136] As Figure 7 shown, the humidification film drying device proposed by the embodiment of the present invention includes:

[0137] An acquisition module 10, configured to acquire the current moisture content of the environment where the fresh air device is located and / or the historical operation data of the fresh air device when the fresh air device receives a shutdown instruction.

[0138] A judgment module 20, configured to determine whether the humidification film of the fresh air device needs to be dried according to the current moisture content and / or the historical operation data. And

[0139] The acquisition module 30 is further configured to acquire indoor environment parameters and outdoor environment parameters when the humidification film needs to be dried.

[0140] A control module 40, configured to control the fresh air device to dry the humidification film according to the indoor environment parameters and the outdoor environment parameters.

[0141] In one embodiment, the control module 40 is further configured to determine a target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters; control the fresh air device to operate in the target circulation mode; and control the operating state of the air supply fan and / or the operating mode and operating state of the heat pump system.

[0142] In one embodiment, when the outdoor environmental parameters include the moisture content of the fresh air and the indoor environmental parameters include the moisture content of the return air, the control module 40 is further configured to determine the target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters, including: determining the target circulation mode as the internal circulation mode when the moisture content of the fresh air is greater than the moisture content of the return air; determining the target circulation mode as the external circulation mode when the moisture content of the fresh air is less than or equal to the moisture content of the return air; or when the outdoor environmental parameters include the fresh air temperature and the indoor environmental parameters include the return air temperature, the control module 40 is further configured to determine the target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters, including:

[0143] Determining the target circulation mode as the internal circulation mode when the fresh air temperature is greater than the return air temperature; and determining the target circulation mode as the external circulation mode when the fresh air temperature is less than or equal to the return air temperature.

[0144] In one embodiment, the control module 40 is further configured to control the air supply fan to operate at a preset speed and / or control the heat pump system to operate in a heating mode, and control the heat pump system to operate at a preset heating power.

[0145] In one embodiment, the control module 40 is further configured to obtain the moisture content of the incoming air and the moisture content of the supplied air of the fresh air device; stop drying the humidification membrane and shut down when the difference between the moisture content of the incoming air and the moisture content of the supplied air is less than a first preset moisture content; and / or stop drying the humidification membrane and shut down when the duration of drying the humidification membrane by the fresh air device is greater than a first preset duration.

[0146] In one embodiment, after the fresh air device dries the humidification membrane for a second preset duration, the control module 40 is further configured to obtain the moisture content of the incoming air and the moisture content of the supplied air of the fresh air device; and adjust the operating frequency of the compressor in the heat pump system according to the difference between the moisture content of the incoming air and the moisture content of the supplied air.

[0147] In one embodiment, after the fresh air device dries the humidification membrane for a third preset duration, the control module 40 is further configured to obtain the coil temperature of the indoor heat exchanger of the fresh air device; and adjust the speed of the air supply fan according to the coil temperature.

[0148] In one embodiment, the determination module 20 is further configured to determine that the fresh air device needs to be dried when the fresh air device has turned on the humidification mode, the difference between the moisture content of the supply air and the moisture content of the fresh air is greater than a preset moisture content threshold, the float switch is turned off, or the closing duration of the float switch is greater than a preset duration.

[0149] In this embodiment, by obtaining the current moisture content data and / or historical operation data of the fresh air device to determine whether the humidification membrane of the fresh air device needs to be dried, the accuracy of the drying control of the fresh air device is improved. If it is determined that the humidification membrane needs to be dried, the fresh air device can be controlled to mechanically dry the humidification membrane according to the indoor environmental parameters and outdoor environmental parameters, so as to avoid the humidification membrane being immersed in water for a long time, reduce the possibility of bacteria breeding or mildew and scaling, and avoid the technical problem that the moisture remains in the humidification membrane of the fresh air device after operation in the prior art, which affects the use of the fresh air device.

[0150] It should be understood that although the steps in the flowchart in the embodiments of the present application are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and they can be executed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

[0151] It should be understood that the above is only an example, and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0152] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and no limitation is made here.

[0153] In addition, for the technical details not described in detail in this embodiment, reference can be made to the control method of the fresh air device provided in any embodiment of the present invention, which will not be elaborated here.

[0154] In addition, it should be noted that in this text, the terms "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system including a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or system including such element.

[0155] The serial numbers of the above-described embodiments of the present invention are for description only and do not represent the superiority or inferiority of the embodiments.

[0156] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as Read Only Memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0157] The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A control method for a fresh air device, characterized in that, the control method for the fresh air device includes: when the fresh air device receives a shutdown instruction, obtaining the current moisture content of the environment where the fresh air device is located and / or the historical operation data of the fresh air device; determining whether the humidification membrane of the fresh air device needs to be dried according to the current moisture content and / or the historical operation data; when the humidification membrane needs to be dried, obtaining indoor environmental parameters and outdoor environmental parameters; and controlling the fresh air device to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters.

2. The control method for a fresh air device according to claim 1, characterized in that, the fresh air device includes: a fresh air duct, an exhaust duct, a bypass channel, a heat exchange system, a fresh air fan, an exhaust fan, a fresh air valve, an exhaust valve and a bypass valve. The fresh air duct communicates the indoor space and the outdoor environment. The heat exchange system includes a compressor, a heat exchanger, an electronic expansion valve and a condenser. The fresh air fan and the heat exchanger are both arranged in the fresh air duct. The fresh air fan is used to drive outdoor fresh air to be discharged into the indoor space after passing through the heat exchanger. The exhaust duct communicates the indoor space and the outdoor environment. The exhaust fan is arranged in the exhaust duct. The exhaust fan is used to drive indoor air to be discharged into the outdoor environment. The fresh air valve is arranged in the fresh air duct and is used to open or close the fresh air duct. The exhaust valve is arranged in the exhaust duct and is used to open or close the exhaust duct. The bypass channel communicates the fresh air duct and the exhaust duct. The bypass valve is arranged in the bypass channel and is used to open or close the bypass channel. A humidification membrane is also arranged in the fresh air duct. The fresh air duct is also used to dry the humidification membrane through fresh air or return air; the controlling the fresh air device to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters includes: determining the target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters; controlling the fresh air device to operate in the target circulation mode; and controlling the operating state of the air supply fan and / or the operating mode and operating state of the heat pump system.

3. The control method for a fresh air device according to claim 2, characterized in that, the outdoor environmental parameters include the fresh air moisture content, and the indoor environmental parameters include the return air moisture content. The determining the target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters includes: when the fresh air moisture content is greater than the return air moisture content, determining the target circulation mode as the internal circulation mode; when the fresh air moisture content is less than or equal to the return air moisture content, determining the target circulation mode as the external circulation mode; or the outdoor environmental parameters include the fresh air temperature, and the indoor environmental parameters include the return air temperature. The determining the target circulation mode of the fresh air device according to the indoor environmental parameters and the outdoor environmental parameters includes: when the fresh air temperature is greater than the return air temperature, determining the target circulation mode as the internal circulation mode; and When the fresh air temperature is less than or equal to the return air temperature, determine that the target circulation mode is the external circulation mode.

4. The control method of the fresh air device according to claim 2, wherein, the controlling the operating state of the air supply fan and / or the operating mode and operating state of the heat pump system includes: controlling the air supply fan to operate at a preset speed and / or controlling the heat pump system to operate in heating mode, and controlling the heat pump system to operate at a preset heating power.

5. The control method of the fresh air device according to any one of claims 1-4, wherein, the control method of the fresh air device further includes: acquiring the moisture content of the incoming air and the moisture content of the supplied air of the fresh air device; when the difference between the moisture content of the incoming air and the moisture content of the supplied air is less than a first preset moisture content, stop drying the humidification membrane and shut down; and / or when the duration of drying the humidification membrane by the fresh air device is greater than a first preset duration, stop drying the humidification membrane and shut down.

6. The control method of the fresh air device according to any one of claims 1-4, wherein, the control method of the fresh air device further includes: after drying the humidification membrane of the fresh air device for a second preset duration, acquiring the moisture content of the incoming air and the moisture content of the supplied air of the fresh air device; and adjusting the operating frequency of the compressor in the heat pump system according to the difference between the moisture content of the incoming air and the moisture content of the supplied air.

7. The control method of the fresh air device according to any one of claims 1-4, wherein, the control method of the fresh air device further includes: after drying the humidification membrane of the fresh air device for a third preset duration, acquiring the coil temperature of the indoor heat exchanger of the fresh air device; and adjusting the speed of the air supply fan according to the coil temperature.

8. The control method of the fresh air device according to claim 1, wherein, the determining whether the humidification membrane of the fresh air device needs to be dried according to the current moisture content and / or the historical operation data includes: when the fresh air device has turned on the humidification mode, the difference between the moisture content of the supplied air and the moisture content of the fresh air is greater than a preset moisture content threshold, the float switch is disconnected or the closing duration of the float switch is greater than a preset duration, it is determined that the fresh air device needs to be dried.

9. A humidification membrane drying device, wherein, the humidification membrane drying device includes: an acquisition module, configured to acquire the current moisture content of the environment where the fresh air device is located and / or the historical operation data of the fresh air device when the fresh air device receives a shutdown instruction; a judgment module, configured to determine whether the humidification membrane of the fresh air device needs to be dried according to the current moisture content and / or the historical operation data; the acquisition module is further configured to acquire indoor environmental parameters and outdoor environmental parameters when the humidification membrane needs to be dried; and a control module, configured to control the fresh air device to dry the humidification membrane according to the indoor environmental parameters and the outdoor environmental parameters.

10. A humidification membrane drying equipment, wherein, The humidifying film drying device includes: a memory, a processor, and a humidifying film drying program stored on the memory and executable on the processor, the humidifying film drying program being configured to implement the control method of the fresh air device according to any one of claims 1 to 8.

11. A storage medium, characterized in that a humidifying film drying program is stored on the storage medium, and when the humidifying film drying program is executed by a processor, it implements the control method of the fresh air device according to any one of claims 1 to 8.

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