Air handling equipment and its self-cleaning methods, cleaning devices, and storage media

Abstract

This invention discloses an air handling device and its self-cleaning method, cleaning device, and storage medium. The air handling device has an exhaust duct and a fresh air duct. An exhaust valve is provided at the outlet of the exhaust duct, and a fresh air valve is provided at the inlet of the fresh air duct. A first filter assembly, a second filter assembly, and a fresh air fan are sequentially arranged in the fresh air duct from the fresh air inlet to the fresh air outlet. A return air chamber is formed between the first filter assembly and the second filter assembly. The return air chamber is connected to the exhaust duct through a return air valve. The method includes: when the air handling device meets the self-cleaning conditions, controlling the air handling device to enter a self-cleaning mode; in the self-cleaning mode, controlling the exhaust valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust fan to be running, so as to self-clean the first filter assembly through indoor air, thereby achieving self-cleaning of the first filter assembly.

Description

Technical Field

[0001] This invention relates to the field of air treatment technology, and in particular to an air treatment device and its self-cleaning method, cleaning device, and storage medium. Background Technology

[0002] As users have increasingly higher demands for air quality, more and more air conditioners are incorporating fresh air systems. For example, radiant air conditioners often include fresh air ducts with filters to remove large particles of dust and debris from outdoor air before introducing it into the room, thus improving indoor air quality. However, if the filters are not cleaned regularly, it will affect air quality and ventilation efficiency. Related technologies primarily rely on users to clean them periodically, but users easily forget to do so, and for radiant air conditioners installed on the ceiling, cleaning is inconvenient. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a self-cleaning method for an air handling unit. By controlling the exhaust valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust fan to be running, the first filter component is self-cleaned using indoor air. This achieves self-cleaning of the first filter component, improves the intelligence of the equipment, effectively reduces manual cleaning by the user, and is simple without increasing hardware costs.

[0004] A second objective of this invention is to provide a computer-readable storage medium.

[0005] The third objective of this invention is to provide an air handling device.

[0006] The fourth objective of this invention is to provide a self-cleaning device for an air handling equipment.

[0007] To achieve the above objectives, a first aspect of the present invention provides a self-cleaning method for an air handling device. The air handling device has an exhaust duct and a fresh air duct. The inlet of the exhaust duct is adapted to connect with an indoor side, and the outlet of the exhaust duct is adapted to connect with an outdoor side. An exhaust valve is provided at the outlet of the exhaust duct, and an exhaust fan is installed inside the exhaust duct. The inlet of the fresh air duct is adapted to connect with an outdoor side, and the outlet of the fresh air duct is adapted to connect with an indoor side. A fresh air valve is provided at the inlet of the fresh air duct, and the fresh air duct is equipped with sequentially arranged [fabricated structures] from the fresh air inlet to the fresh air outlet. The air handling unit is equipped with a first filter component, a second filter component, and a fresh air fan. A return air chamber is formed between the first filter component and the second filter component. The return air chamber is connected to the exhaust air duct via a return air valve. The method includes: when the air handling unit meets the self-cleaning conditions, controlling the air handling unit to enter a self-cleaning mode; in the self-cleaning mode, controlling the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust fan to be running, so as to self-clean the first filter component with indoor air.

[0008] According to the self-cleaning method of the air handling equipment of the present invention, in the self-cleaning mode, the exhaust air valve is controlled to be closed, the return air valve and the fresh air valve are controlled to be open, the fresh air fan is controlled to be closed, and the exhaust fan is controlled to be running, so as to self-clean the first filter component through the indoor air, thereby realizing the self-cleaning of the first filter component, improving the intelligence of the equipment, effectively reducing the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0009] In some embodiments, the self-cleaning method for the air handling equipment further includes: determining that the air handling equipment meets the self-cleaning conditions upon receiving a power-on command for the air handling equipment.

[0010] In some embodiments, the self-cleaning method of the air handling equipment further includes: acquiring a first self-cleaning time; when the first self-cleaning time meets a first target self-cleaning time, acquiring a first target operating parameter when the air handling equipment is turned on, and controlling the air handling equipment to operate according to the first target operating parameter.

[0011] In some embodiments, the self-cleaning method for an air handling unit further includes: determining that the air handling unit meets the self-cleaning conditions upon receiving a shutdown command for the air handling unit.

[0012] In some embodiments, the self-cleaning method for an air handling device further includes: obtaining a first cumulative operating time of the air handling device; and determining that the air handling device meets the self-cleaning conditions when the air handling device is in an on-state and the first cumulative operating time meets a first target cumulative operating time.

[0013] In some embodiments, before controlling the air handling equipment to enter the self-cleaning mode, the self-cleaning method of the air handling equipment further includes: controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to operate in a first direction, and the air handling equipment to operate in heating mode, so as to dry the return air cavity and the first filter component by the heat generated by the air handling equipment in the fresh air duct, wherein the first direction is the direction from the fresh air outlet to the fresh air inlet.

[0014] In some embodiments, during the process of drying the return air cavity and the first filter component by the heat generated in the fresh air duct by the air handling equipment, the self-cleaning method of the air handling equipment further includes: acquiring the humidity of the return air cavity; and controlling the air handling equipment to enter a self-cleaning mode when the humidity is less than a first target humidity.

[0015] In some embodiments, before controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to run in the first direction, and the air handling equipment to operate in heating mode, the self-cleaning method of the air handling equipment further includes: controlling the exhaust air valve and the fresh air valve to be closed, the return air valve to be open, and the exhaust fan to be running, and acquiring the humidity of the return air chamber; when the humidity is greater than or equal to the second target humidity, controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to run in the first direction, and the air handling equipment to operate in heating mode; when the humidity is less than the second target humidity, controlling the air handling equipment to enter a self-cleaning mode.

[0016] In some embodiments, the self-cleaning method of the air handling equipment further includes: obtaining a second self-cleaning time; and controlling the air handling equipment to shut down when the second self-cleaning time meets a second target self-cleaning time.

[0017] In some embodiments, the self-cleaning method of the air handling device further includes: acquiring a third self-cleaning time; when the third self-cleaning time meets a third target self-cleaning time, acquiring a second target operating parameter before the air handling device enters the self-cleaning mode, controlling the air handling device to operate according to the second target operating parameter, and resetting the first cumulative operating time to zero.

[0018] In some embodiments, the self-cleaning method for the air handling unit further includes: acquiring a second cumulative operating time of the air handling unit; and when the second cumulative operating time of the air handling unit meets a second target cumulative operating time, controlling the air handling unit to issue a cleaning reminder so that the user can clean the first filter component.

[0019] In some embodiments, after the air handling unit is controlled to issue a cleaning reminder, the self-cleaning method of the air handling unit further includes: determining whether the air handling unit has been cleaned within a preset time; if the air handling unit has not been cleaned, then controlling the air handling unit to issue a cleaning reminder again.

[0020] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the self-cleaning method of the air handling equipment of any of the above embodiments.

[0021] According to the computer-readable storage medium of the present invention, the self-cleaning method of the air handling equipment described above is used to control the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust air fan to be running, so as to self-clean the first filter component through indoor air. This enables the self-cleaning of the first filter component, improves the intelligence of the equipment, effectively reduces the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0022] To achieve the above objectives, a third aspect of the present invention provides an air handling device, comprising: a memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the self-cleaning method of the air handling device of any of the above embodiments.

[0023] According to an embodiment of the air handling equipment of the present invention, the self-cleaning method of the air handling equipment described above is adopted. By controlling the exhaust air valve to be in a closed state, the return air valve and the fresh air valve to be in an open state, the fresh air fan to be in a closed state, and the exhaust air fan to be in a running state, the first filter component is self-cleaned by the indoor air. This enables the self-cleaning of the first filter component, improves the intelligence level of the equipment, effectively reduces the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0024] To achieve the above objectives, a fourth aspect of the present invention provides a self-cleaning device for an air handling equipment. The air handling equipment includes an exhaust duct and a fresh air duct. The inlet of the exhaust duct is adapted to connect with an indoor side, and the outlet of the exhaust duct is adapted to connect with an outdoor side. An exhaust valve is provided at the outlet of the exhaust duct, and an exhaust fan is installed inside the exhaust duct. The inlet of the fresh air duct is adapted to connect with an outdoor side, and the outlet of the fresh air duct is adapted to connect with an indoor side. A fresh air valve is provided at the inlet of the fresh air duct, and a first [missing information] is sequentially arranged inside the fresh air duct from the fresh air inlet to the fresh air outlet. The device includes a filter assembly, a second filter assembly, and a fresh air fan. A return air chamber is formed between the first filter assembly and the second filter assembly. The return air chamber is connected to the exhaust air duct via a return air valve. The device also includes a control module, which controls the air handling equipment to enter a self-cleaning mode when the air handling equipment meets the self-cleaning conditions. In the self-cleaning mode, the control module keeps the exhaust air valve closed, the return air valve and the fresh air valve open, the fresh air fan closed, and the exhaust fan running, so as to self-clean the first filter assembly using indoor air.

[0025] According to an embodiment of the present invention, the self-cleaning device of the air handling equipment, in the self-cleaning mode, controls the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust fan to be running, so as to self-clean the first filter component through indoor air, thereby realizing the self-cleaning of the first filter component, improving the intelligence level of the equipment, effectively reducing the need for manual cleaning by users, and the method is simple and does not require additional hardware costs.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an air handling device according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic flowchart of a self-cleaning method for an air handling device according to an embodiment of the present invention;

[0029] Figures 3(a) and 3(b) are schematic flowcharts of a self-cleaning method for an air handling device according to a specific embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of an air handling device according to an embodiment of the present invention;

[0031] Figure 5 This is a block diagram of a self-cleaning device for an air handling apparatus according to an embodiment of the present invention. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] The following description, with reference to the accompanying drawings, describes an air handling device and its self-cleaning method, cleaning apparatus, and storage medium according to embodiments of the present invention.

[0034] In embodiments of the present invention, the air handling equipment may be a radiant air conditioner or other equipment with air conditioning capabilities, and no limitation is made herein.

[0035] In some embodiments of the present invention, the air handling equipment has an exhaust duct and a fresh air duct. The inlet of the exhaust duct is adapted to communicate with the indoor side, and the outlet of the exhaust duct is adapted to communicate with the outdoor side. An exhaust valve is provided at the outlet of the exhaust duct, and an exhaust fan is provided inside the exhaust duct. The inlet of the fresh air duct is adapted to communicate with the outdoor side, and the outlet of the fresh air duct is adapted to communicate with the indoor side. A fresh air valve is provided at the inlet of the fresh air duct. A first filter assembly, a second filter assembly, and a fresh air fan are sequentially arranged inside the fresh air duct from the fresh air inlet to the fresh air outlet. A return air chamber is formed between the first filter assembly and the second filter assembly. The return air chamber and the exhaust duct are connected and disconnected by a return air valve.

[0036] For example, refer to Figure 1 As shown, the air handling unit 100 has an exhaust duct 1 and a fresh air duct 2. The exhaust duct 1 is a ventilation channel that exhausts indoor air to the outdoor side. The inlet of the exhaust duct 1 is adapted to connect with the indoor side, and the outlet of the exhaust duct 1 is adapted to connect with the outdoor side. An exhaust valve 11 is provided at the outlet of the exhaust duct 1 to control the connection between the exhaust duct 1 and the outdoor side. An exhaust fan 12 is also installed inside the exhaust duct 1; the exhaust fan 12 is a fan motor that exhausts indoor air to the outdoor side.

[0037] Fresh air duct 2 refers to a ventilation channel that delivers fresh air from the outdoor side to the indoor side. The inlet of fresh air duct 2 is suitable for connecting with the outdoor side, and the outlet of fresh air duct 2 is suitable for connecting with the indoor side. A fresh air valve 21 is provided at the inlet of fresh air duct 2 to realize the opening and closing of fresh air duct 2 with the outdoor side. From the fresh air inlet to the fresh air outlet, a first filter assembly 22, a second filter assembly 23, and a fresh air fan 24 are arranged sequentially in fresh air duct 2. The first filter assembly 22 is used to filter large particles of dust and debris in the outdoor air. The first filter assembly 22 can be a high-density filter, such as a pre-filter. The second filter assembly 23 is used to filter PM2.5 in the outdoor air. The second filter assembly 23 can be a low-density filter, such as a HAPA filter. The fresh air fan 24 is a fan motor that delivers fresh air from the outdoor side to the indoor side. A return air chamber is formed between the first filter component 22 and the second filter component 23. The return air chamber and the exhaust air duct 1 are connected and disconnected through the return air valve 25.

[0038] It should be noted that the first filter component 22 can be located to the right of the fresh air valve 21 (e.g., Figure 1 Alternatively, it can be located on the left side of the fresh air valve 21. Considering that large particles of dust and debris in the outdoor air may affect the fresh air valve 21, the first filter component 22 can be located on the right side of the fresh air valve 21.

[0039] In addition, the air handling unit 100 also includes a temperature control device and a humidity control device. The temperature control device is suitable for regulating the temperature of the fresh air flowing through the fresh air duct 2. The temperature control device includes an outdoor unit 31, a first heat exchanger 32, a first throttling component 33, and a second heat exchanger 34. The outdoor unit 31 may include a compressor, a four-way valve, and a liquid receiver, etc. The second heat exchanger 34 is also located inside the outdoor unit 31. The first heat exchanger 32 and the second heat exchanger 34 may be plate heat exchangers, etc., and the first throttling component 33 may be an electronic expansion valve, etc. The temperature control device can cool or heat the fresh air flowing through the fresh air duct 2. During heating, the high-temperature, high-pressure gaseous refrigerant from the compressor in the outdoor unit 31 enters the first heat exchanger 32, where it condenses and liquefies, releasing a large amount of heat to raise the temperature of the fresh air in the fresh air duct 2. Then, the first throttling component 33 throttles and reduces the pressure of the refrigerant flowing out of the first heat exchanger 32, allowing it to enter the second heat exchanger 34. After evaporating and vaporizing in the second heat exchanger 34 to absorb heat from the outside, it enters the compressor in the outdoor unit 31 to begin the next cycle. During cooling, the high-temperature, high-pressure gaseous refrigerant from the compressor in the outdoor unit 31 enters the second heat exchanger 34, where it condenses and liquefies, releasing a large amount of heat. Then, the first throttling component 33 throttles and reduces the pressure of the refrigerant flowing out of the second heat exchanger 34, allowing it to enter the first heat exchanger 32. After evaporating and vaporizing in the first heat exchanger 32 to absorb heat from the fresh air in the fresh air duct 2, it enters the compressor in the outdoor unit 31 to begin the next cycle.

[0040] The humidity control device is suitable for regulating the humidity of the fresh air flowing through the fresh air duct 2. The humidity control device includes a dehumidification unit and a humidification unit 47. The dehumidification unit is suitable for dehumidifying the fresh air flowing through the fresh air duct 2; the humidification unit 47 is suitable for humidifying the fresh air flowing through the fresh air duct 2.

[0041] The dehumidification unit includes a third heat exchanger 42, a second throttling component 43, a fourth heat exchanger 44, a third throttling component 45, and a fifth heat exchanger 46. The third heat exchanger 42, fourth heat exchanger 44, and fifth heat exchanger 46 can be plate heat exchangers, etc., and the second throttling component 43 and third throttling component 45 can be electronic expansion valves, etc. It should be noted that the number of heat exchangers installed in the fresh air duct 2 in the dehumidification unit can be one or more, depending on parameters such as the length of the fresh air duct 2. In this example, two heat exchangers, such as the fourth heat exchanger 44 and the fifth heat exchanger 46, are used for illustration. In addition, during dehumidification, a cooling dehumidification method is used. The high-temperature, high-pressure gaseous refrigerant from the compressor in the outdoor unit 31 enters the third heat exchanger 42, where it is condensed and liquefied, releasing a large amount of heat. Then, the refrigerant flowing out of the third heat exchanger 42 is throttled and depressurized by the second throttling component 43 and enters the fourth heat exchanger 44. In the fourth heat exchanger 44, it evaporates and vaporizes to absorb the heat of the fresh air in the fresh air duct 2, thus achieving cooling dehumidification. Then, the refrigerant flowing out of the fourth heat exchanger 44 is throttled and depressurized by the third throttling component 45 and enters the fifth heat exchanger 46. In the fifth heat exchanger 46, it evaporates and vaporizes to absorb the heat of the fresh air in the fresh air duct 2, thus achieving cooling dehumidification. Finally, the refrigerant from the fifth heat exchanger 46 enters the compressor in the outdoor unit 31 to start the next cycle.

[0042] The humidification unit 47 can adopt a wet film structure, etc., and by injecting water into the wet film, the fresh air in the fresh air duct 2 absorbs moisture when flowing through the wet film, so as to humidify.

[0043] The air handling unit 100 may also include an exhaust inlet sensor 13 and a fresh air inlet sensor 26. The exhaust inlet sensor 13 is located at the outlet of the exhaust fan 12 and is used to detect air quality information (including but not limited to temperature, humidity, PM2.5 concentration, CO2 concentration, etc.) at the indoor exhaust outlet. The fresh air inlet sensor 26 is located at the inlet of the fresh air duct 2 and is used to detect air quality (including but not limited to temperature, humidity, PM2.5 concentration, CO2 concentration, etc.) at the outdoor fresh air inlet.

[0044] Figure 2 This is a schematic flowchart of a self-cleaning method for an air handling device according to an embodiment of the present invention. The method is applied to... Figure 1 The air handling equipment shown is used as an example for illustration, but is not intended to limit this application.

[0045] refer to Figure 2 As shown, the self-cleaning method of this air handling equipment may include the following steps:

[0046] S201: When the air handling equipment meets the self-cleaning conditions, control the air handling equipment to enter the self-cleaning mode.

[0047] For example, refer to Figure 1 When the air handling unit 100 is running in fresh air mode, the exhaust air valve 11 and the fresh air valve 21 are open, the return air valve 25 is closed, and the fresh air fan 24 is on. At this time, the outdoor fresh air first passes through the first filter component 22, which performs preliminary filtration on the outdoor fresh air, such as filtering out large particles of dust and debris in the outdoor air. Then it passes through the second filter component 23, which performs secondary filtration on the outdoor fresh air after preliminary filtration, such as filtering out PM2.5 in the outdoor air. Then it passes through the temperature regulation device and the humidity regulation device in sequence (if temperature and humidity regulation is not required, it will not work) and enters the fresh air fan 24. The fresh air fan 24 blows the filtered outdoor fresh air into the indoor side, while the indoor air is discharged to the outside through the exhaust fan 12 and the exhaust air valve 11.

[0048] During the above process, large dust particles and debris in the outdoor air may adhere to the first filter element 22, resulting in a reduction in the airflow entering the fresh air duct 2. At the same time, the dust and debris on the first filter element 22 will also cause the air quality entering the fresh air duct 2 to deteriorate. Therefore, it can be determined whether the air handling equipment 100 meets the self-cleaning conditions. When the air handling equipment 100 meets the self-cleaning conditions, the air handling equipment 100 is controlled to enter the self-cleaning mode to remove the dust and debris on the first filter element 22 and perform self-cleaning on the first filter element 22.

[0049] It should be noted that there are several ways to determine whether an air handling unit meets the self-cleaning requirements. For example, it can be judged based on the operating time of the air handling unit, the degree of dirt, etc., or a fixed time can be set.

[0050] S202, in self-cleaning mode, controls the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust fan to be running, so as to self-clean the first filter component through indoor air.

[0051] For example, refer to Figure 1Because the second filter element 23 is used to filter out fine particulate dust such as PM2.5, its filter density is relatively low, and it may have a multi-layer filter structure. This makes it impossible for the first filter element 22 to self-clean through the fresh air duct 2. For example, if the return air valve 25 is closed, the fresh air valve 21 is open, and the fresh air fan 24 is reversed to blow indoor air out to the outdoor side through the fresh air duct 2 to self-clean the first filter element 22, the multi-layer filter structure of the second filter element 23 causes a large amount of air to be blocked, making it difficult to remove dust, debris, etc. adhering to the first filter element 22.

[0052] Based on this, in the embodiments of the invention, in the self-cleaning mode, the exhaust valve 11 is controlled to be closed, the return air valve 25 and the fresh air valve 21 are controlled to be open, the fresh air fan 24 is controlled to be closed, and the exhaust fan 12 is controlled to be running. In this way, the exhaust fan 12 can blow indoor air out to the outdoor side through the exhaust duct 1, the return air valve 25, the return air chamber, the fresh air valve 21, and the first filter assembly 22, i.e., blowing out from the fresh air inlet in the opposite direction, thereby using the air discharged by the exhaust fan 12 to self-clean the first filter assembly 22. It should be noted that during this process, the exhaust fan 12 can operate at its maximum speed to improve the cleaning effect on the first filter assembly 22. Furthermore, due to the multi-filter structure of the second filter assembly 23 and the fact that the fresh air fan 24 is closed, even if the airflow in the exhaust duct 1 is large, it is difficult for it to enter the indoor side, thus reducing the impact of the exhaust air during cleaning on the indoor side.

[0053] In the above embodiments, by controlling the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust air fan to be running, the self-cleaning of the first filter component is achieved, which improves the intelligence of the equipment, effectively reduces the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0054] In some embodiments, the self-cleaning method for the air handling equipment further includes: determining that the air handling equipment meets the self-cleaning conditions upon receiving a power-on command for the air handling equipment.

[0055] In other words, the air handling unit 100 can perform self-cleaning every time it is turned on.

[0056] Furthermore, the self-cleaning method for the air handling equipment also includes: acquiring a first self-cleaning time; when the first self-cleaning time meets a first target self-cleaning time, acquiring a first target operating parameter when the air handling equipment is turned on, and controlling the air handling equipment to operate according to the first target operating parameter.

[0057] It should be noted that the first target self-cleaning time can be set according to the actual situation, for example, it can be set to 1 minute; the first target operating parameters can be the default target operating parameters of the air handling unit 100 when it is turned on, or the target operating parameters set by the user, etc., there are no restrictions here.

[0058] For example, when the air handling unit 100 receives a power-on command, it first enters the self-cleaning mode. In the self-cleaning mode, the exhaust air valve 11 is controlled to be closed, the return air valve 25 and the fresh air valve 21 are controlled to be open, the fresh air fan 24 is controlled to be closed, and the exhaust fan 12 is controlled to run at its maximum speed to self-clean the first filter component 22. At the same time, the self-cleaning time is acquired and recorded as the first self-cleaning time, and compared with the first target self-cleaning time. When the first self-cleaning time reaches the first target self-cleaning time (e.g., 1 minute), it means that after a period of self-cleaning, most of the dust and debris on the first filter component 22 has been removed. At this time, the air handling unit 100 exits the self-cleaning mode and runs according to the operating mode set at the time of power-on.

[0059] Therefore, performing self-cleaning each time the air handling unit is turned on can effectively reduce the impact of the first filter element on air quality during the current operation. For example, if the air handling unit has been shut down for a long time before being turned on, a lot of dust and debris may have accumulated on the first filter element. If self-cleaning is not performed when the unit is turned on, the accumulated dust and debris will affect air quality. Therefore, performing self-cleaning each time the unit is turned on can reduce the impact of the first filter element on air quality.

[0060] In other embodiments, the self-cleaning method for the air handling equipment further includes: determining that the air handling equipment meets the self-cleaning conditions upon receiving a shutdown command for the air handling equipment.

[0061] In other words, the air handling unit 100 can perform self-cleaning every time it is turned off.

[0062] Furthermore, the self-cleaning method for the air handling equipment also includes: obtaining a second self-cleaning time; and controlling the air handling equipment to shut down when the second self-cleaning time meets a second target self-cleaning time.

[0063] It should be noted that the self-cleaning time of the second target can be set according to the actual situation, for example, it can be set to 1 minute.

[0064] For example, when the air handling unit 100 receives a shutdown command, it enters a self-cleaning mode. In self-cleaning mode, the exhaust air valve 11 is controlled to be closed, the return air valve 25 and the fresh air valve 21 are controlled to be open, the fresh air fan 24 is controlled to be closed, and the exhaust fan 12 is controlled to run at its maximum speed to self-clean the first filter component 22. At the same time, the self-cleaning time is acquired and recorded as the second self-cleaning time, and compared with the second target self-cleaning time. When the second self-cleaning time reaches the second target self-cleaning time (e.g., 1 minute), it indicates that after a period of self-cleaning, most of the dust and debris on the first filter component 22 has been removed. At this time, the air handling unit 100 exits the self-cleaning mode and shuts down.

[0065] Therefore, performing self-cleaning each time the air handling unit is turned off is more effective in removing dust and debris from the first filter element. For example, if the air handling unit does not perform self-cleaning each time it is turned off, the dust and particles generated during each operation may adhere to the first filter element due to long-term lack of cleaning, making it difficult to remove the dust and particles from the first filter element. Therefore, performing self-cleaning each time the unit is turned off is more effective in cleaning the first filter element.

[0066] In some other embodiments, the self-cleaning method for the air handling equipment further includes: obtaining a first cumulative operating time of the air handling equipment; and determining that the air handling equipment meets the self-cleaning conditions when the air handling equipment is in the power-on state and the first cumulative operating time meets a first target cumulative operating time.

[0067] It should be noted that the cumulative running time of the first target can be set according to the actual situation, for example, it can be set to 36 hours.

[0068] For example, after the air handling unit 100 is turned on, the accumulated time of continuous operation of the air handling unit 100 (including the start-up time of each air handling unit 100) is obtained and recorded as the first accumulated operating time. This is then compared with the first target accumulated operating time. If the first accumulated operating time exceeds the first target accumulated operating time (e.g., 36 hours), it indicates that the air handling unit 100 has been running for a long time, and the first filter component 22 on it has accumulated a large amount of dust, debris, etc. It is necessary to clean this dust, debris, etc. Otherwise, it will affect the air quality and ventilation effect. Therefore, in this case, it can be determined that the air handling unit 100 meets the self-cleaning conditions. At this time, the air handling unit 100 is controlled to enter the self-cleaning mode to clean the dust, debris, etc. accumulated on the first filter component 22.

[0069] Furthermore, the self-cleaning method for the air handling equipment also includes: acquiring a third self-cleaning time; when the third self-cleaning time meets the third target self-cleaning time, acquiring a second target operating parameter before the air handling equipment enters the self-cleaning mode, controlling the air handling equipment to operate according to the second target operating parameter, and resetting the first cumulative operating time to zero.

[0070] For example, during the operation of the air handling unit 100 in the set mode, if the first cumulative operating time of the air handling unit 100 reaches the first target cumulative operating time, the air handling unit 100 will pause the operation of the set mode and enter the self-cleaning mode to self-clean the first filter component 22. At the same time, the self-cleaning time will be obtained and recorded as the third self-cleaning time, and compared with the third target self-cleaning time. If the third self-cleaning time reaches the third target self-cleaning time, the air handling unit 100 will be controlled to exit the self-cleaning mode and run the set mode again, while the first cumulative operating time will be reset to zero.

[0071] Thus, by self-cleaning the first filter component based on the cumulative operating time of the air handling equipment, the cleanliness of the first filter component can be controlled from the perspective of the overall operating time.

[0072] It should be noted that the above three methods can be used individually or in combination. There are no specific restrictions here. When the three methods are used in combination, the cleaning effect can be very good.

[0073] In some embodiments, before controlling the air handling equipment to enter the self-cleaning mode, the self-cleaning method of the air handling equipment further includes: controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to operate in a first direction, and the air handling equipment to operate in heating mode, so as to dry the return air cavity and the first filter component by the heat generated by the air handling equipment in the fresh air duct, wherein the first direction is the direction from the fresh air outlet to the fresh air inlet.

[0074] Specifically, considering that dry dust and debris are easier to remove, the first filter element 22 can be dried before self-cleaning.

[0075] For example, when the air handling unit 100 receives a shutdown command, or when the air handling unit 100 is in the power-on state and the first cumulative operating time meets the first target cumulative operating time, the first filter component 22 can be dried first, and then self-cleaned.

[0076] Combination Figure 1As shown, when the first filter assembly 22 is being dried, the exhaust valve 11 is controlled to be closed, the fresh air valve 21 is controlled to be open, and the air handling unit 100 is controlled to operate in heating mode. At this time, the high-temperature and high-pressure gaseous refrigerant from the compressor in the outdoor unit 31 enters the first heat exchanger 32 and is condensed and liquefied, releasing a large amount of heat to increase the temperature of the fresh air duct 2. At the same time, the fresh air fan 24 is controlled to run in reverse at its maximum speed so that the indoor air absorbs heat in the fresh air duct 2 and is then blown into the return air chamber through the second filter assembly 23, and finally enters the first filter assembly 22 through the fresh air valve 21 to dry the return air chamber and the first filter assembly 22.

[0077] It should be noted that since the second filter element 23 will block a significant amount of airflow, the speed of the fresh air fan 24 can be set to its maximum speed to improve the drying effect on the return air chamber and the first filter element 22. Additionally, the return air valve 25 can be in an open or closed state. When closed, it further enhances the drying effect on the return air chamber and the first filter element 22, thereby improving the self-cleaning effect of the first filter element 22. When open, it can also dry the exhaust duct 1, further improving the self-cleaning effect of the first filter element 22.

[0078] In some embodiments, during the process of drying the return air cavity and the first filter component using heat generated in the fresh air duct by the air handling unit, the self-cleaning method of the air handling unit further includes: acquiring the humidity of the return air cavity; and controlling the air handling unit to enter a self-cleaning mode when the humidity is less than a first target humidity. The first target humidity can be set according to actual conditions.

[0079] In other words, during the drying process of the return air cavity and the first filter component 22, the humidity of the return air cavity is also acquired, such as... Figure 1 As shown, the humidity of the return air cavity is detected by the fresh air inlet sensor 26 located at the inlet of the fresh air duct 2, and the drying is stopped and the self-cleaning mode is entered based on the humidity.

[0080] In some embodiments, before controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to run in the first direction, and the air handling equipment to operate in heating mode, the self-cleaning method of the air handling equipment further includes: controlling the exhaust air valve and the fresh air valve to be closed, the return air valve to be open, and the exhaust fan to be running, and acquiring the humidity of the return air chamber; when the humidity is greater than or equal to the second target humidity, controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to run in the first direction, and the air handling equipment to operate in heating mode; when the humidity is less than the second target humidity, controlling the air handling equipment to enter a self-cleaning mode.

[0081] In other words, before drying the return air chamber and the first filter component 22, it can be determined whether the humidity of the return air chamber is greater than or equal to the second target humidity. If so, drying is performed and the self-cleaning mode is entered after drying is completed. Otherwise, the self-cleaning mode can be entered directly.

[0082] For example, when the air handling unit 100 receives a shutdown command, or when the air handling unit 100 is in the on-state and the first cumulative operating time meets the first target cumulative operating time, the exhaust air valve 11 and the fresh air valve 21 are first controlled to be closed, and the return air valve 25 is controlled to be open. The exhaust fan 12 is also controlled to run at a lower speed. In this way, the return air chamber and the exhaust air duct 1 are connected through the return air valve 25, and the humidity of the exhaust air in the return air chamber is detected by the fresh air inlet sensor 26. Specifically, when the humidity is less than the second target humidity, it indicates that the humidity in the return air chamber is low, and the air handling unit 100 can be controlled to enter self-cleaning mode; when the humidity is greater than or equal to the second target humidity, it indicates that the humidity in the return air chamber is too high, and the return air chamber, the first filter component 22, etc., need to be dried.

[0083] During drying, the exhaust valve 11 can be controlled to be closed, the fresh air valve 21 to be open, the exhaust fan 12 to be closed, the fresh air fan 24 to run in reverse at maximum speed, and the air handling unit 100 to operate in heating mode, in order to dry the return air chamber, the first filter assembly 22, and the exhaust duct 1. During the drying process, if the humidity in the return air chamber is lower than the first target humidity, the air handling unit is controlled to enter self-cleaning mode. The first target humidity is less than or equal to the second target humidity.

[0084] Therefore, determining whether drying is needed based on humidity not only ensures that the first filter component has a good self-cleaning effect, but also reduces system energy consumption.

[0085] In some embodiments, the self-cleaning method for the air handling unit further includes: acquiring a second cumulative operating time of the air handling unit; and when the second cumulative operating time of the air handling unit meets a second target cumulative operating time, controlling the air handling unit to issue a cleaning reminder so that the user can clean the first filter component. The second target cumulative operating time is greater than the first target cumulative operating time, and the second target cumulative operating time can be set according to actual conditions, for example, it can be set to one year.

[0086] Specifically, although the above embodiments can achieve self-cleaning of the first filter component 22, after the air handling equipment 100 has been running continuously for a long time, some dust and debris on the first filter component 22 may be difficult to remove, or the first filter component 22 may need maintenance. Therefore, the second cumulative operating time of the air handling equipment 100 can be obtained, and when the second cumulative operating time reaches the second target cumulative operating time (e.g., 1 year), the air handling equipment 100 can be controlled to issue a cleaning reminder to remind the user to clean and maintain the first filter component 22 to ensure its filtration effect.

[0087] Furthermore, after the air handling unit issues a cleaning reminder, the self-cleaning method of the air handling unit also includes: determining whether the air handling unit has been cleaned within a preset time; if the air handling unit has not been cleaned, then controlling the air handling unit to issue a cleaning reminder again.

[0088] Specifically, to prevent users from forgetting to clean the air handling unit 100 after the first reminder, a preset time can be set. If the air handling unit 100 is not cleaned within the preset time, the air handling unit 100 will be controlled again to remind the user to clean it.

[0089] To enable those skilled in the art to better understand the present invention, a specific embodiment is provided below to illustrate the self-cleaning method of the air handling equipment of the present invention. Referring to Figures 3(a) and 3(b), the self-cleaning method of the air handling equipment may include the following steps:

[0090] S301, the air handling unit is powered on and running.

[0091] S302, determine whether the air handling unit is being powered on for the first time. If yes, proceed to step S303; otherwise, proceed to step S304.

[0092] S303, the time of the air handling unit is forcibly reset to zero, the cumulative running time is calculated, and step S313 is executed.

[0093] S304. Has the air handling unit been running continuously for M hours? If yes, proceed to step S305; otherwise, proceed to step S307.

[0094] S305, a reminder to clean the air handling unit.

[0095] S306, determine whether the air handling unit has been cleaned within the preset time. If yes, proceed to step S303; otherwise, return to step S305.

[0096] S307, Upon receiving the power-on command, the air handling unit is controlled to enter the self-cleaning mode and step S308 is executed.

[0097] S308, close the exhaust air valve, open the return air valve and the fresh air valve, close the fresh air fan, and turn on the exhaust fan to run at maximum speed.

[0098] S309. Does the self-cleaning operation time meet 1 minute? If yes, proceed to step S310; otherwise, return to step S308.

[0099] S310 controls the air handling equipment to operate according to the operating mode set at startup.

[0100] S311, Determine whether the air handling unit is turned off. If yes, proceed to step S313; otherwise, proceed to step S314.

[0101] S312, Obtain the first cumulative operating time of the air handling unit.

[0102] S313, determine whether the first cumulative running time has reached N hours. If yes, proceed to step S314; otherwise, return to step S312.

[0103] S314, Equipment load stopped running.

[0104] S315, close the fresh air valve and exhaust air valve, open the return air valve, and start the exhaust fan.

[0105] S316, the fresh air inlet sensor detects whether the humidity of the return air cavity exceeds the first target humidity. If so, proceed to step S317; otherwise, proceed to step S322.

[0106] S317, close the exhaust valve and open the fresh air valve.

[0107] S318, the fresh air fan runs in the direction from the fresh air outlet to the fresh air inlet.

[0108] S319, the air handling unit is in heating operation.

[0109] S320 dries the return air chamber and the first filter assembly.

[0110] S321, the fresh air inlet sensor detects whether the humidity of the return air cavity exceeds the second target humidity. If so, proceed to step S312; otherwise, return to step S317.

[0111] S322, close the exhaust air valve, and open the fresh air valve and return air valve.

[0112] S323: Turn on the exhaust fan to its maximum speed, turn off the fresh air fan, and perform self-cleaning.

[0113] S324. Determine whether the self-cleaning operation time has reached Y hours. If yes, proceed to step S325; otherwise, return to step S323.

[0114] S325 controls the air handling unit to operate in the mode prior to self-cleaning and to reset the first cumulative operating time to zero.

[0115] In this embodiment, when the air handling unit meets the self-cleaning conditions, such as when the air handling unit is turned on, receives a shutdown command, or runs continuously for an extended period, the air handling unit is controlled to enter a self-cleaning mode. In self-cleaning mode, the exhaust air valve is closed, the return air valve and fresh air valve are open, the fresh air fan is closed, and the exhaust fan is running. This allows the first filter component to be self-cleaned using indoor air, improving the intelligence of the equipment, effectively reducing manual cleaning by the user, and the method is simple and does not require additional hardware costs. Furthermore, if the humidity in the return air chamber is too high before self-cleaning, the return air chamber and the first filter component are dried, thereby effectively improving the cleaning effect on the first filter component.

[0116] In summary, the self-cleaning method for an air handling device according to an embodiment of the present invention controls the air handling device to enter a self-cleaning mode when the air handling device meets the self-cleaning conditions. In the self-cleaning mode, the exhaust air valve is controlled to be closed, the return air valve and the fresh air valve are controlled to be open, the fresh air fan is controlled to be closed, and the exhaust fan is controlled to be running, so as to self-clean the first filter component through indoor air, thereby realizing the self-cleaning of the first filter component, improving the intelligence level of the device, effectively reducing the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0117] Corresponding to the above embodiments, this invention also proposes a computer-readable storage medium storing a program thereon, which, when executed by a processor, implements the self-cleaning method of the air handling equipment of any of the above embodiments.

[0118] According to the computer-readable storage medium of the present invention, the self-cleaning method of the air handling equipment described above is used to control the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust air fan to be running, so as to self-clean the first filter component through indoor air. This enables the self-cleaning of the first filter component, improves the intelligence of the equipment, effectively reduces the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0119] Corresponding to the above embodiments, this invention also proposes an air handling device, see reference. Figure 4As shown, the air handling device 400 includes: a memory 402, a processor 404, and a program stored in the memory 402 and executable on the processor 404. When the processor 404 executes the program 406, it implements the self-cleaning method of the air handling device in any of the above embodiments.

[0120] According to an embodiment of the air handling equipment of the present invention, the self-cleaning method of the air handling equipment described above is adopted. By controlling the exhaust air valve to be in a closed state, the return air valve and the fresh air valve to be in an open state, the fresh air fan to be in a closed state, and the exhaust air fan to be in a running state, the first filter component is self-cleaned by the indoor air. This enables the self-cleaning of the first filter component, improves the intelligence level of the equipment, effectively reduces the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0121] Corresponding to the above embodiments, this invention also proposes a self-cleaning device for air handling equipment, see reference. Figure 1 and Figure 5 As shown, the air handling unit 100 has an exhaust duct 1 and a fresh air duct 2. The inlet of the exhaust duct 1 is adapted to connect with the indoor side, and the outlet of the exhaust duct 1 is adapted to connect with the outdoor side. An exhaust valve 11 is provided at the outlet of the exhaust duct 1, and an exhaust fan 12 is installed inside the exhaust duct 1. The inlet of the fresh air duct 2 is adapted to connect with the outdoor side, and the outlet of the fresh air duct 2 is adapted to connect with the indoor side. A fresh air valve 21 is provided at the inlet of the fresh air duct 2. A first filter assembly 22, a second filter assembly 23, and a fresh air fan 24 are arranged sequentially from the fresh air inlet to the fresh air outlet inside the fresh air duct 2. A return air chamber is formed between the first filter assembly 22 and the second filter assembly 23. The return air chamber is connected to the exhaust duct 1 by a return air valve 25. The self-cleaning device 500 of the air handling unit includes:

[0122] The control module 510 is used to: control the air handling equipment to enter the self-cleaning mode when the air handling equipment meets the self-cleaning conditions, and in the self-cleaning mode, control the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed and the exhaust fan to be running, so as to self-clean the first filter component through indoor air.

[0123] In some embodiments, the control module 510 is further configured to: determine that the air handling equipment 100 meets the self-cleaning conditions when receiving a power-on command for the air handling equipment 100.

[0124] In some embodiments, the control module 510 is further configured to: obtain a first self-cleaning time; when the first self-cleaning time meets a first target self-cleaning time, obtain a first target operating parameter when the air handling equipment 100 is turned on, and control the air handling equipment 100 to operate according to the first target operating parameter.

[0125] In some embodiments, the control module 510 is further configured to: determine that the air handling equipment 100 meets the self-cleaning conditions when a shutdown command of the air handling equipment 100 is received.

[0126] In some embodiments, the control module 510 is further configured to: obtain a first cumulative operating time of the air handling equipment 100; and determine that the air handling equipment 100 meets the self-cleaning conditions when the air handling equipment 100 is in the power-on state and the first cumulative operating time meets the first target cumulative operating time.

[0127] In some embodiments, before controlling the air handling unit 100 to enter the self-cleaning mode, the control module 510 is further configured to: control the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to operate in a first direction, and the air handling unit 100 to operate in heating mode, so as to dry the return air cavity and the first filter component by the heat generated by the air handling unit 100 in the fresh air duct, wherein the first direction is the direction from the fresh air outlet to the fresh air inlet.

[0128] In some embodiments, during the process of drying the return air cavity and the first filter component by the heat generated in the fresh air duct by the air handling unit 100, the control module 510 is also used to: obtain the humidity of the return air cavity; and control the air handling unit 100 to enter the self-cleaning mode when the humidity is less than the first target humidity.

[0129] In some embodiments, before controlling the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to run in the first direction, and the air handling equipment 100 to operate in heating mode, the control module 510 is further configured to: control the exhaust air valve and the fresh air valve to be closed, the return air valve to be open, and the exhaust fan to be running, and obtain the humidity of the return air chamber; when the humidity is greater than or equal to the second target humidity, control the exhaust air valve to be closed, the fresh air valve to be open, the fresh air fan to run in the first direction, and the air handling equipment 100 to operate in heating mode; when the humidity is less than the second target humidity, control the air handling equipment 100 to enter the self-cleaning mode.

[0130] In some embodiments, the control module 510 is further configured to: acquire a second self-cleaning time; and control the air handling equipment 100 to shut down when the second self-cleaning time meets the second target self-cleaning time.

[0131] In some embodiments, the control module 510 is further configured to: obtain a third self-cleaning time; when the third self-cleaning time meets the third target self-cleaning time, obtain a second target operating parameter before the air handling device 100 enters the self-cleaning mode, and control the air handling device 100 to operate according to the second target operating parameter, and reset the first cumulative operating time to zero.

[0132] In some embodiments, the control module 510 is further configured to: obtain a second cumulative operating time of the air handling unit 100; and when the second cumulative operating time of the air handling unit 100 meets a second target cumulative operating time, control the air handling unit 100 to issue a cleaning reminder so that the user can clean the first filter component.

[0133] In some embodiments, after the air handling unit 100 is controlled to issue a cleaning reminder, the control module 510 is further configured to: determine whether the air handling unit 100 has been cleaned within a preset time; if the air handling unit 100 has not been cleaned, then control the air handling unit 100 to issue a cleaning reminder again.

[0134] It should be noted that for details not disclosed in the self-cleaning device of the air handling equipment, please refer to the details disclosed in the self-cleaning method of the air handling equipment, which will not be repeated here.

[0135] According to an embodiment of the present invention, the self-cleaning device of the air handling equipment, when the air handling equipment meets the self-cleaning conditions, controls the air handling equipment to enter the self-cleaning mode through the control module. In the self-cleaning mode, the exhaust air valve is controlled to be closed, the return air valve and the fresh air valve are controlled to be open, the fresh air fan is controlled to be closed, and the exhaust fan is controlled to be running, so as to self-clean the first filter component through the indoor air. This improves the intelligence of the equipment, effectively reduces the need for manual cleaning by the user, and the method is simple and does not require additional hardware costs.

[0136] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0137] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0138] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0139] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0140] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A self-cleaning method for an air handling unit, characterized in that, The air handling equipment has an exhaust duct and a fresh air duct. The inlet of the exhaust duct is adapted to connect with the indoor side, and the outlet of the exhaust duct is adapted to connect with the outdoor side. An exhaust valve is provided at the outlet of the exhaust duct, and an exhaust fan is installed inside the exhaust duct. The inlet of the fresh air duct is adapted to connect with the outdoor side, and the outlet of the fresh air duct is adapted to connect with the indoor side. A fresh air valve is provided at the inlet of the fresh air duct. A first filter assembly, a second filter assembly, and a fresh air fan are sequentially arranged inside the fresh air duct from the fresh air inlet to the fresh air outlet. A return air chamber is formed between the first filter assembly and the second filter assembly. The return air chamber is connected to the exhaust duct by a return air valve. The method includes: When the air handling equipment meets the self-cleaning conditions, the air handling equipment is controlled to enter the self-cleaning mode; In the self-cleaning mode, the exhaust valve is closed, the return air valve and the fresh air valve are open, the fresh air fan is closed, and the exhaust fan is running. The exhaust fan blows indoor air to the outside through the exhaust duct, the return air valve, the return air chamber, the fresh air valve, and the first filter assembly, and uses the air discharged by the exhaust fan to self-clean the first filter assembly. Obtain the first cumulative operating time of the air handling equipment; When the air handling equipment is in the powered-on state and the first cumulative operating time meets the first target cumulative operating time, it is determined that the air handling equipment meets the self-cleaning conditions. Before the air handling equipment enters the self-cleaning mode, the exhaust valve is controlled to be closed, the fresh air valve is controlled to be open, the fresh air fan is controlled to run in the first direction, and the air handling equipment is controlled to operate in heating mode, so as to dry the return air chamber and the first filter component by the heat generated by the air handling equipment in the fresh air duct. The first direction is the direction from the fresh air outlet to the fresh air inlet.

2. The method according to claim 1, characterized in that, The method further includes: Upon receiving the start-up command for the air handling equipment, it is determined that the air handling equipment meets the self-cleaning conditions.

3. The method according to claim 2, characterized in that, The method further includes: Obtain the first self-cleaning time; When the first self-cleaning time meets the first target self-cleaning time, the first target operating parameters of the air handling equipment at startup are obtained, and the air handling equipment is controlled to operate according to the first target operating parameters.

4. The method according to claim 1, characterized in that, The method further includes: Upon receiving a shutdown command from the air handling unit, it is determined that the air handling unit meets the self-cleaning conditions.

5. The method according to claim 1, characterized in that, The method further includes drying the return air cavity and the first filter assembly using heat generated in the fresh air duct by the air handling equipment: Obtain the humidity of the return air cavity; When the humidity is less than the first target humidity, the air handling equipment is controlled to enter the self-cleaning mode.

6. The method according to claim 1, characterized in that, Before controlling the exhaust valve to be closed, the fresh air valve to be open, the fresh air fan to rotate in the first direction, and the air handling equipment to operate in heating mode, the method further includes: The system controls the exhaust air valve and the fresh air valve to be in the closed state, the return air valve to be in the open state, and the exhaust fan to be in the running state, and obtains the humidity of the return air chamber; When the humidity is greater than or equal to the second target humidity, the exhaust valve is controlled to be closed, the fresh air valve is controlled to be open, the fresh air fan is controlled to run in the first direction, and the air handling equipment is controlled to operate in heating mode. When the humidity is less than the second target humidity, the air handling equipment is controlled to enter the self-cleaning mode.

7. The method according to claim 4, characterized in that, The method further includes: Obtain the second self-cleaning time; When the second self-cleaning time meets the second target self-cleaning time, the air handling equipment is controlled to shut down.

8. The method according to claim 1, characterized in that, The method further includes: Obtain the third self-cleaning time; When the third self-cleaning time meets the third target self-cleaning time, the second target operating parameters before the air handling equipment enters the self-cleaning mode are obtained, and the air handling equipment is controlled to operate according to the second target operating parameters, and the first cumulative operating time is reset to zero.

9. The method according to claim 1, characterized in that, The method further includes: Obtain the second cumulative operating time of the air handling equipment; When the second cumulative operating time of the air handling unit meets the second target cumulative operating time, the air handling unit is controlled to issue a cleaning reminder so that the user can clean the first filter component.

10. The method according to claim 9, characterized in that, After the air handling unit issues a cleaning reminder, the method further includes: Determine whether the air handling equipment has been cleaned within a preset time period; If the air handling unit is not cleaned, the unit will be controlled again to issue a cleaning reminder.

11. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the self-cleaning method of the air handling device according to any one of claims 1-10.

12. An air handling device, characterized in that, include: A memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the self-cleaning method of the air handling equipment according to any one of claims 1-10.

13. A self-cleaning device for an air handling unit, characterized in that, The air handling equipment includes an exhaust duct and a fresh air duct. The inlet of the exhaust duct is adapted to connect with the indoor side, and the outlet of the exhaust duct is adapted to connect with the outdoor side. An exhaust valve is provided at the outlet of the exhaust duct, and an exhaust fan is installed inside the exhaust duct. The inlet of the fresh air duct is adapted to connect with the outdoor side, and the outlet of the fresh air duct is adapted to connect with the indoor side. A fresh air valve is provided at the inlet of the fresh air duct. A first filter assembly, a second filter assembly, and a fresh air fan are sequentially arranged inside the fresh air duct from the fresh air inlet to the fresh air outlet. A return air chamber is formed between the first filter assembly and the second filter assembly. The return air chamber is connected to the exhaust duct via a return air valve. The device includes: The control module is used to control the air handling equipment to enter the self-cleaning mode when the air handling equipment meets the self-cleaning conditions. In the self-cleaning mode, the control module controls the exhaust air valve to be closed, the return air valve and the fresh air valve to be open, the fresh air fan to be closed, and the exhaust fan to be running. The exhaust fan blows indoor air to the outdoor side through the exhaust air duct, the return air valve, the return air chamber, the fresh air valve and the first filter component, and uses the air discharged by the exhaust fan to self-clean the first filter component. Obtain the first cumulative operating time of the air handling equipment; When the air handling equipment is in the powered-on state and the first cumulative operating time meets the first target cumulative operating time, it is determined that the air handling equipment meets the self-cleaning conditions. Before the air handling equipment enters the self-cleaning mode, the exhaust valve is controlled to be closed, the fresh air valve is controlled to be open, the fresh air fan is controlled to run in the first direction, and the air handling equipment is controlled to operate in heating mode, so as to dry the return air chamber and the first filter component by the heat generated by the air handling equipment in the fresh air duct. The first direction is the direction from the fresh air outlet to the fresh air inlet.

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