Fresh air air conditioner filter dirty blockage detection method, control method and fresh air air conditioner

Abstract

The embodiment of the present application provides a method for detecting and controlling the dirty and clogged filter of a fresh air air conditioner, a control method, and a fresh air air conditioner. The above-mentioned method for detecting the dirty and clogged filter of a fresh air air conditioner comprises: obtaining the current data of the influencing factor, the influencing factor being a factor that affects the target theoretical change rate of the indoor carbon dioxide concentration; determining the target theoretical change rate of the indoor carbon dioxide concentration according to the current data of the influencing factor, the target theoretical change rate being the indoor carbon dioxide concentration change rate corresponding to the current data of the influencing factor when the fresh air is turned on and the filter is not dirty and clogged; obtaining the actual change rate of the indoor carbon dioxide concentration when the fresh air is turned on; comparing the actual change rate with the target theoretical change rate; when it is determined that the actual change rate is lower than the target theoretical change rate, determining that the fresh air air conditioner filter is dirty and clogged. Compared with the prior art, the method for detecting the dirty and clogged filter of a fresh air air conditioner provided in this embodiment has high accuracy and low cost.

Description

Technical Field

[0001] The present application relates to the technical field of fresh air air conditioners, and in particular to a method for detecting and controlling a dirty or clogged filter of a fresh air air conditioner, and a fresh air air conditioner. Background Art

[0002] After using the fresh air air conditioner for a period of time, the filter is prone to dirt and blockage, resulting in reduced fresh air function of the fresh air air conditioner. The current solution is to add differential pressure sensors on both sides of the filter, but this solution is costly, and due to different wind speeds and different installation environments, the existing air duct resistance is also different, resulting in low accuracy of the final judgment. Summary of the invention

[0003] The embodiments of the present application provide a method for detecting and controlling a filter blockage of a fresh air air conditioner, and a fresh air air conditioner, which can effectively detect whether the filter is blocked.

[0004] On the one hand, the present embodiment provides a method for detecting dirty or clogged fresh air air-conditioning filters, comprising: obtaining current data of influencing factors, where the influencing factors are factors that affect the target theoretical change rate of indoor carbon dioxide concentration; determining the target theoretical change rate of indoor carbon dioxide concentration based on the current data of the influencing factors, where the target theoretical change rate is the indoor carbon dioxide concentration change rate corresponding to the current data of the influencing factors when the fresh air is turned on and the filter is not dirty or clogged; obtaining the actual change rate of indoor carbon dioxide concentration when the fresh air is turned on; comparing the actual change rate with the target theoretical change rate; and when it is determined that the actual change rate is lower than the target theoretical change rate, determining that the fresh air air-conditioning filter is dirty or clogged.

[0005] In some embodiments, the influencing factors include at least one of the number of animals indoors, the difference in carbon dioxide concentration indoors and outdoors, and the speed of a motor.

[0006] In some of the embodiments, before obtaining the current data of the influencing factor, the method further includes: determining that the fresh air opening time reaches a preset time.

[0007] In some of the embodiments, after determining that the filter is dirty and clogged, the method also includes: determining the difference between the actual change rate and the target theoretical change rate; obtaining the dirtiness of the filter based on comparing the difference with a preset relationship table; wherein the preset relationship table is the correspondence between the difference range and the dirtiness.

[0008] On the other hand, the present embodiment provides a control method for a fresh air air conditioner, including: obtaining current data of an influencing factor, the influencing factor affecting the target theoretical change rate of indoor carbon dioxide concentration; determining, based on the current data of the influencing factor, the target theoretical change rate of indoor carbon dioxide concentration when the fresh air function is turned on; obtaining the actual change rate of indoor carbon dioxide concentration when the fresh air function is turned on; comparing the actual change rate with the target theoretical change rate; when it is determined that the actual change rate is lower than the target theoretical change rate, determining that the filter of the fresh air air conditioner is dirty and clogged; and switching the fresh air air conditioner from an intake mode to an exhaust mode.

[0009] In some of the embodiments, after determining that the filter of the fresh air air conditioner is dirty and clogged, and before switching the fresh air air conditioner from an intake mode to an exhaust mode, the method also includes: determining the difference between the actual change rate and the target theoretical change rate; obtaining the filter dirtiness based on the difference and a preset relationship table; switching the fresh air air conditioner from an intake mode to an exhaust mode, including: after the filter dirtiness of the fresh air air conditioner reaches a preset level, switching the fresh air air conditioner from an intake mode to an exhaust mode.

[0010] This embodiment also provides a fresh air air conditioner, including a memory, a processor and a data acquisition device, the data acquisition device is configured to collect data on influencing factors; the memory stores a computer program, and when the computer program is executed by the processor, it implements the fresh air air conditioner filter dirty blockage detection method of any of the above embodiments.

[0011] In some of the embodiments, the fresh air air conditioner also includes an air transmission device, the air transmission device includes an air duct, at least a portion of the air duct is provided with side-by-side air inlet sub-ducts and air outlet sub-ducts; a first opening and closing valve is provided on the air inlet sub-duct, a filter is provided in the air inlet sub-duct; and a second opening and closing valve is provided on the air outlet sub-duct.

[0012] In some of the embodiments, a partition is provided on at least a portion of the air duct, the partition is connected to the side walls on opposite sides of the air duct, and the air inlet sub-channel and the air outlet sub-channel are respectively located on opposite sides of the partition.

[0013] In some of the embodiments, the first opening and closing valve is hinged to the upper end of the air inlet duct, and a first limit piece is provided at the lower end of the air inlet duct. In the air intake mode, the air flow drives the first opening and closing valve to rotate away from the first limit piece, and the air inlet duct is opened; in the exhaust mode, the air flow drives the first opening and closing valve to rotate toward the first limit piece, and the air inlet duct is closed; the second opening and closing valve is hinged to the upper end of the air inlet duct, and a second limit piece is provided at the lower end of the air inlet duct. In the exhaust mode, the air flow drives the second opening and closing valve to rotate away from the second limit piece, and the air inlet duct is opened; in the air intake mode, the air flow drives the second opening and closing valve to rotate toward the second limit piece, and the air inlet duct is closed.

[0014] Compared with the prior art, the fresh air air conditioner filter blockage detection method provided in this embodiment obtains the actual change rate of indoor carbon dioxide concentration and compares it with the target theoretical change rate. When the actual change rate of indoor carbon dioxide concentration is lower than the target theoretical change rate, it is determined that the fresh air air conditioner filter is blocked. It can be realized by only obtaining the real-time concentration of indoor carbon dioxide, with high accuracy and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a flow chart of a method for detecting dirty and blocked fresh air air conditioner filters provided in some embodiments of the present application;

[0017] Figure 2 It is a flowchart of different embodiments of a method for detecting dirty and blocked fresh air air conditioner filters provided in some embodiments of the present application;

[0018] Figure 3 It is a flowchart of a control method of a fresh air air conditioner provided in some embodiments of the present application;

[0019] Figure 4 is a schematic diagram of the state of the air transmission device in the air intake mode provided by some embodiments of the present application;

[0020] Figure 5 is a schematic diagram of the state of the air transmission device in the exhaust mode provided by some embodiments of the present application;

[0021] Figure 6 is a schematic cross-sectional structure diagram of an air transmission device provided in some embodiments of the present application;

[0022] Figure 7 is a schematic cross-sectional structure diagram of an air transmission device provided in some embodiments of the present application;

[0023] Figure 8 It is a schematic diagram of the structure of the motor provided in some embodiments of the present application.

[0024] Reference numerals:

[0025] 10. Air duct; 101. Air inlet duct; 102. Air outlet duct; 103. Filter; 104. First opening and closing valve; 105. Second opening and closing valve; 106. Partition; 107. First limiter; 108. Second limiter; 109. Air inlet fan; 110. Motor body; 111. Exhaust fan. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0028] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0029] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0030] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0031] The fresh air function refers to the function of the fresh air air conditioner to transport outdoor gas to the indoor during normal use to ensure the fresh air in the room. If the filter 103 of the fresh air air conditioner is dirty and blocked, the amount of fresh air entering the room will be reduced, and the pressure difference on both sides of the filter 103 will increase. Based on this, in the prior art, by adding a pressure difference sensor on both sides of the filter 103, the data detected by the pressure difference sensors on both sides of the filter 103 are compared to determine whether the filter 103 is dirty and blocked. However, this solution is relatively expensive, and due to different fresh air gears, different wind speeds, different installation environments, and different resistances in the air duct 10, all of which will reduce the accuracy of the determination result.

[0032] The inventor of the present application has found through research that the use of air conditioners is usually in a relatively closed space. When the fresh air function is turned on, outdoor air is continuously transported indoors, and the indoor air pressure gradually increases. The indoor air pressure is greater than the outdoor air pressure. When there is a pressure difference between indoors and outdoors, the indoor air is discharged from gaps such as doors and windows to complete air exchange. When the indoor carbon dioxide generation source is constant, the fresh air filter 103 is not dirty and blocked, and the speed of the fresh air motor is constant, the rate of change of the indoor carbon dioxide concentration (which can be understood as the target theoretical rate of change) is usually constant, and when other conditions remain unchanged and the fresh air filter 103 is dirty and blocked, the rate of change of the indoor carbon dioxide concentration (which can be understood as the actual rate of change) is usually lower than the rate of change in the aforementioned case. Based on this discovery, the present application provides a method for detecting dirty blockage of a fresh air air conditioner filter 103 based on the rate of change of the indoor carbon dioxide concentration, a method for controlling a fresh air air conditioner, and an electronic device for executing the method for detecting dirty blockage of a fresh air air conditioner filter 103 and / or the method for controlling a fresh air air conditioner.

[0033] Next, the specific embodiments of the solution proposed in this application are introduced in detail.

[0034] An embodiment of the present application provides an electronic device, including a processor and a memory connected in communication. The memory stores computer-readable instructions. The processor can implement the following fresh air air conditioner filter 103 dirty blockage detection method and / or fresh air air conditioner control method by calling the computer-readable instructions.

[0035] In some embodiments, the electronic device may be an air conditioner, or a mobile terminal such as a mobile phone or a tablet computer.

[0036] In some embodiments, the electronic device may further include a data acquisition device, which is communicatively connected to the processor and / or the memory.

[0037] The data acquisition device is used to collect data of influencing factors. The influencing factors are factors that affect the target theoretical change rate of indoor carbon dioxide concentration. The influencing factors can be at least one of the number of animals in the room, the difference in indoor and outdoor carbon dioxide concentrations, and the air conditioner motor speed.

[0038] The data acquisition device can send the collected data directly to the processor, and the processor calls the computer-readable instructions based on the data obtained from the data acquisition device to implement the fresh air air conditioning filter 103 dirty blockage detection method and / or the fresh air air conditioning control method introduced later. Alternatively, the data acquisition device can send the collected data to the memory for storage. The processor can read the data collected by the data acquisition device from the memory, and call the computer-readable instructions to implement the fresh air air conditioning filter 103 dirty blockage detection method and / or the fresh air air conditioning control method introduced later.

[0039] When the electronic device is an air conditioner, the data acquisition device can be a thermal imaging sensor, a radar wave sensor, etc. In this case, the data acquisition device can collect the number of animals indoors; the data acquisition device can also be a carbon dioxide concentration detection device installed respectively on the inner and outer units of the air conditioner; the data acquisition device can also be an electronic component for collecting the speed of the air conditioner motor; of course, the data acquisition device can be the sum of devices (or electronic components) used to collect data on various influencing factors.

[0040] When the electronic device is a mobile terminal, the data acquisition device may be a wireless communication module of the mobile terminal. In this case, the data acquisition device may be connected to at least one of a device for collecting the number of indoor animals, a device for collecting indoor and outdoor carbon dioxide concentrations, and an air conditioner to obtain data on the influencing factors.

[0041] See also Figure 1 An embodiment of the present application further provides a method for detecting the dirtiness and blockage of the fresh air conditioning filter 103. The method for detecting the dirtiness and blockage of the fresh air conditioning filter 103 can be applied to the aforementioned electronic device.

[0042] The method may include the following steps.

[0043] First, obtain current data on impact factors.

[0044] It should be noted that the influencing factors are factors that affect the target theoretical change rate of indoor carbon dioxide concentration, such as the number of indoor animals, the difference in indoor and outdoor carbon dioxide concentration, and the air conditioner motor speed mentioned above. The target theoretical change rate refers to the change rate of indoor carbon dioxide concentration when the influencing factor data is constant, the fresh air is turned on, and the filter 103 is not dirty or blocked.

[0045] Specifically, the method for determining the target theoretical rate of change of indoor carbon dioxide concentration includes the following steps: according to the number of animals in the room, generally speaking, mainly according to the number of people in the room, roughly calculate the rate of increase of indoor carbon dioxide concentration, and then calculate the target theoretical rate of change of indoor carbon dioxide concentration according to the current preset air volume of the fresh air air conditioner (different wind speed gears correspond to different preset air volumes). In a preferred example, while obtaining the number of animals in the room, the animal movement speed is also obtained, and the amount of carbon dioxide produced by the animal is corrected according to the different animal movement speeds, and finally fed back to the target theoretical rate of change of indoor carbon dioxide concentration.

[0046] In some other embodiments, referring to Figure 2 , and the target theoretical rate of change of indoor carbon dioxide concentration can also be determined according to the difference between indoor and outdoor carbon dioxide concentrations. In a specific example, according to the difference between the current indoor and outdoor carbon dioxide concentrations, when outdoor air is introduced into the room, the actual rate of change of indoor carbon dioxide is different. For example, under the same wind speed, when the difference between indoor and outdoor carbon dioxide concentrations is small, the indoor carbon dioxide concentration drops slowly after the fresh air function is turned on. The target theoretical rate of change of indoor carbon dioxide concentration is determined through theoretical calculation.

[0047] In other embodiments, the target theoretical change rate of the indoor carbon dioxide concentration can also be determined based on the motor speed. As the use time of the fresh air air conditioner increases, the filter 103 becomes dirty and clogged. Under the rated power of the motor, the speed of the motor will gradually decrease. Therefore, by obtaining the actual motor speed and comparing it with the preset speed, it is assisted in determining whether the filter 103 is dirty and clogged.

[0048] In some other embodiments, the target theoretical rate of change of indoor carbon dioxide concentration can be determined by one of the number of animals indoors, the difference in indoor and outdoor carbon dioxide concentrations, and the speed of the fresh air air conditioner motor; or they can be combined, and the final target theoretical rate of change of indoor carbon dioxide concentration can be obtained by weighting different parameters in the combination.

[0049] It can be understood that different data of the influencing factors will correspond to different target theoretical change rates. For example, when the number of people indoors is 1, the target theoretical change rate is A1; when the number of people indoors is 2, the target theoretical change rate is A2, and so on. Alternatively, when the number of people indoors is 1 and the speed of the fresh air motor is V1, the target theoretical change rate is B1; when the number of people indoors is 1 and the speed of the fresh air motor is V2, the target theoretical change rate is V2; when the number of people indoors is 2 and the speed of the fresh air motor is V1, the target theoretical change rate is B3; when the number of people indoors is 2 and the speed of the fresh air motor is V2, the target theoretical change rate is B4, and so on. Alternatively, when the number of people indoors is 1, the speed of the fresh air motor is V1, and the indoor and outdoor carbon dioxide concentrations are C1 and C2 respectively, the target theoretical change rate is D1; ​​when the number of people indoors is 1, the speed of the fresh air motor is V2, and the indoor and outdoor carbon dioxide concentrations are C1 and C2 respectively, the target theoretical change rate is D2; when the number of people indoors is 1, the speed of the fresh air motor is V1, and the indoor and outdoor carbon dioxide concentrations are C3 and C2 respectively, the target theoretical change rate is D3, and so on.

[0050] In a specific example, for example, when the influencing factor is the number of people, and the data of the influencing factor is 3 people, the target theoretical change rate of the indoor carbon dioxide concentration is determined based on 3 people, and the subsequent actual change rate of the indoor carbon dioxide concentration should also be based on 3 people. When the influencing factor is any one or more of the indoor and outdoor carbon dioxide concentrations and the motor speed, the specific method of obtaining the target theoretical change rate and the actual change rate of the indoor carbon dioxide concentration is the same, and will not be described in detail.

[0051] In some embodiments, the target theoretical rate of change of indoor carbon dioxide concentration can also be corrected according to the service life of the fresh air air conditioner. As the fresh air air conditioner ages, the motor gradually ages, the motor speed decreases, the ventilation pipe becomes clogged, and at this time, the motor speed is used to assist in determining whether the filter 103 is dirty or clogged, and the error is large. Therefore, the error can be reduced by correcting it according to the service life of the fresh air air conditioner. In a specific example, as the service life of the fresh air air conditioner increases, the preset speed of the motor gradually decreases to avoid the detection error of the dirty filter 103 caused by the influence of the service life of the fresh air air conditioner on the motor speed.

[0052] A corresponding relationship table between different data of influencing factors and different target theoretical change rates may be pre-stored in the memory.

[0053] In some embodiments, when the electronic device is an air conditioner, the processor of the air conditioner can directly obtain the current data of the influencing factor from a data acquisition device used to collect data of the influencing factor; alternatively, the data acquisition device stores the collected data of the influencing factor into a memory, and the data may have a timestamp. In this case, the processor obtains the current data of the influencing factor from the memory.

[0054] In some embodiments, when the electronic device is a mobile terminal, the mobile terminal may communicate with a device for collecting data of the influencing factor based on a wireless communication module to obtain current data of the influencing factor.

[0055] Next, according to the current data of the influencing factor, the target theoretical change rate of the indoor carbon dioxide concentration is determined, and the target theoretical change rate is the indoor carbon dioxide concentration change rate corresponding to the current data of the influencing factor when the fresh air is turned on and the filter 103 is not dirty or blocked.

[0056] In some embodiments, after the current data of the influencing factor is obtained, the target theoretical change rate corresponding to the current data of the influencing factor can be found according to the current data of the influencing factor and the aforementioned correspondence table.

[0057] Of course, in other examples, if the aforementioned correspondence table is not stored in the memory, the processor can obtain the target theoretical rate of change of the indoor carbon dioxide concentration based on the current data of the influencing factor and the preset calculation formula. It should be noted that the calculation formula for the rate of change of the indoor carbon dioxide concentration can adopt the relevant content of the prior art, which will not be elaborated here.

[0058] It should be noted that the step of obtaining the current data of the influencing factor may be performed when the fresh air function is turned on or when the fresh air function is not turned on.

[0059] Next, the actual rate of change of indoor carbon dioxide concentration when the fresh air is turned on is obtained.

[0060] In some embodiments, when the electronic device is an air conditioner, the indoor carbon dioxide concentration is acquired in real time by a carbon dioxide concentration detection device installed in the indoor unit of the air conditioner, and the actual rate of change of the indoor carbon dioxide concentration is calculated.

[0061] In some embodiments, when the electronic device is a mobile terminal, the concentration of carbon dioxide can be acquired in real time through a data acquisition device of other devices and sent to the mobile terminal. The mobile terminal obtains the actual rate of change of the indoor carbon dioxide concentration by calculation.

[0062] It should be noted that in order to ensure the accuracy of the dirt and blockage determination results, the actual change rate of indoor carbon dioxide concentration and the target theoretical change rate of indoor carbon dioxide concentration are the same data for the same influencing factors.

[0063] Next, the actual rate of change of the indoor carbon dioxide concentration is compared with the target theoretical rate of change of the indoor carbon dioxide concentration.

[0064] Then, when it is determined that the actual change rate of the indoor carbon dioxide concentration is lower than the target theoretical change rate, it is determined that the fresh air air conditioning filter 103 is dirty and blocked.

[0065] Compared with the prior art, the method for detecting the dirty and blocked fresh air air conditioner filter 103 provided in this embodiment obtains the actual change rate of the indoor carbon dioxide concentration and compares it with the target theoretical change rate. When the actual change rate of the indoor carbon dioxide concentration is lower than the target theoretical change rate, it is determined that the fresh air air conditioner filter 103 is dirty and blocked. It can be realized by only obtaining the real-time concentration of indoor carbon dioxide, with high accuracy of judgment and low cost.

[0066] In some embodiments, before obtaining the current data of the influencing factor, the method may further include: determining whether the fresh air on time reaches a preset time. After the fresh air air conditioner is turned on, the control system starts timing, and before the preset time is reached, the filter 103 is not judged to be dirty or blocked, so as to avoid misjudgment caused by fluctuations in the startup phase. After the preset time is reached, the filter 103 dirty or blocked detection is started.

[0067] In some embodiments, after determining that the filter 103 is dirty and blocked, the method further includes the following steps: determining the difference between the actual rate of change of the indoor carbon dioxide concentration and the target theoretical rate of change; obtaining the degree of dirtiness (i.e., degree of dirtiness) of the filter 103 based on the difference compared with the preset relationship table, wherein the preset relationship table is the corresponding relationship between the difference range and the degree of dirtiness, and the difference between the actual rate of change of the indoor carbon dioxide and the target theoretical rate of change falls into different intervals, corresponding to the current degree of dirtiness of the filter 103. Among them, the preset relationship table is pre-set and stored in the memory, and can be called when needed. During the use of the fresh air air conditioner, the degree of dirtiness of the filter 103 will inevitably increase gradually with the increase of the use time. In order to avoid repeated cleaning of the filter 103, the user will not be reminded when the degree of dirtiness is within a certain degree. When it exceeds a certain degree, the user will be informed again to remind the user to disassemble and wash the filter 103. By obtaining the specific degree of dirtiness of the filter 103, the user can be given more accurate instructions to avoid frequent prompts.

[0068] On the other hand, this embodiment provides a control method for a fresh air air conditioner, which can be applied to the aforementioned electronic device. Figure 3As shown, the control method includes: obtaining the current data of the influencing factor, which is a factor that affects the target theoretical change rate of the indoor carbon dioxide concentration; determining the target theoretical change rate of the indoor carbon dioxide concentration when the fresh air function is turned on according to the current data of the influencing factor; obtaining the actual change rate of the indoor carbon dioxide concentration when the fresh air function is turned on; comparing the actual change rate with the target theoretical change rate; when it is determined that the actual change rate is lower than the target theoretical change rate, determining that the fresh air air conditioner filter 103 is dirty and blocked; switching the fresh air air conditioner from the air intake mode to the exhaust mode. In this way, the extraction speed of indoor carbon dioxide gas is increased and the user experience is improved.

[0069] In some embodiments, after determining that the filter 103 of the fresh air air conditioner is blocked by dirt, and before the fresh air air conditioner is switched from the air intake mode to the exhaust mode, the method further includes: determining the difference between the actual rate of change of the indoor carbon dioxide concentration and the target theoretical rate of change; and obtaining the degree of dirtiness of the filter 103 based on the difference and the preset relationship table. Switching the fresh air air conditioner from the air intake mode to the exhaust mode includes: after the degree of dirtiness of the fresh air air conditioner filter 103 reaches a preset degree, switching the fresh air air conditioner from the air intake mode to the exhaust mode. By taking the specific degree of dirtiness as a basis, the fresh air air conditioner is selectively controlled to switch from the air intake mode to the exhaust mode.

[0070] In some of the embodiments, when the fresh air air conditioner switches from the air intake mode to the exhaust mode, the indoor air is continuously discharged, and the indoor heat and cold volume will be greatly affected. At this time, the main fan speed of the indoor unit is compensated, that is, the heat exchange efficiency of the indoor heat exchanger is increased to compensate for the indoor heat and cold volume.

[0071] Specifically, the amount of heat and cold loss is determined based on the indoor temperature, the set temperature, and the speed of the fresh air motor, and the speed of the indoor main fan is increased accordingly. Increasing the speed of the main fan can increase the heat and cold output of the indoor heat exchanger, which can improve indoor air circulation while making up for the heat and cold, further optimizing the indoor air quality.

[0072] The control method of the fresh air air conditioner provided in any of the above embodiments includes the corresponding steps of the fresh air air conditioner filter dirtiness detection method provided in the previous embodiment. For its specific operation process, please refer to the contents of the embodiment of the fresh air air conditioner filter dirtiness detection method provided in the previous embodiment, and will not be repeated here.

[0073] Based on the unified inventive concept, this embodiment also provides a fresh air air conditioner, including a memory, a processor and a data acquisition device, the data acquisition device is configured to collect data of influencing factors, the memory stores a computer program, and when the computer program is executed by the processor, it implements the fresh air air conditioner filter 103 dirty blockage detection method of any one of the above embodiments.

[0074] In some embodiments, the fresh air air conditioner further comprises an air transmission device, such as Figure 4 , Figure 5 As shown, it is mainly used for switching between the air intake mode and the exhaust mode of the fresh air air conditioner. Specifically, the air transmission device includes an air duct 10, and at least part of the section of the air duct 10 is provided with a side-by-side air intake sub-channel 101 and an air outlet sub-channel 102, and the air intake sub-channel 101 and the air outlet sub-channel 102 are both part of the air duct 10, and the air duct 10 is divided into the air intake sub-channel 101 and the air outlet sub-channel 102. A first opening and closing valve 104 is provided on the air intake sub-channel 101, which is used to open and close the air intake sub-channel 101. When the first opening and closing valve 104 is opened, the air intake sub-channel 101 is conducted, and when the first opening and closing valve 104 is closed, the air intake sub-channel 101 is closed. The air outlet sub-channel 102 is provided with a second opening and closing valve 105 for opening and closing the air inlet sub-channel 101. When the second opening and closing valve 105 is opened, the air inlet sub-channel 101 is connected, and when the second opening and closing valve 105 is closed, the air inlet sub-channel 101 is closed. A filter 103 is also provided in the air inlet sub-channel 101.

[0075] In a specific example, when the fresh air air conditioner is in the air intake mode, the first opening and closing valve 104 is opened, the second opening and closing valve 105 is closed, and the air flows from the outside to the air duct 10 along the air intake sub-channel 101, is filtered through the filter 103, and finally flows into the room. When the dirtiness of the filter 103 reaches a certain level, the air intake volume of the fresh air air conditioner is low and the air intake quality is poor. At this time, the fresh air air conditioner is switched from the air intake mode to the exhaust mode, the first opening and closing valve 104 is closed, the second opening and closing valve 105 is opened, and the air flows from the room through the air duct 10 to the outside along the air outlet sub-channel 102 to discharge the carbon dioxide in the room.

[0076] Specifically, Figure 8 As shown, the motor adopts a forward and reverse motor, which is arranged in the air duct 10, and is arranged in the non-inlet sub-duct 101 and the outlet sub-duct 102, including a motor body 110, an air inlet fan 109 and an exhaust fan 111 connected to the motor body 110. The motor is arranged as a whole at the common end of the air duct 10, that is, the section where the inlet sub-duct 101 and the outlet sub-duct 102 are not arranged. In the air intake mode of the fresh air air conditioner, the motor rotates forward, and the motor body 110 drives the air inlet fan 109 to rotate to realize the fresh air function. After the dirtiness of the fresh air filter 103 reaches a certain level, the motor is controlled to reverse and the motor body 110 drives the exhaust fan 111 to rotate, and the air containing a high concentration of carbon dioxide in the room is discharged to the outside, accelerating the indoor air circulation and the infiltration of fresh air, and ensuring the freshness of the indoor air.

[0077] In some embodiments, the air duct 10 is provided with a partition 106 in the section where the air inlet sub-duct 101 and the air outlet sub-duct 102 exist. The partition 106 is connected to the side walls on opposite sides of the air duct 10, dividing the air duct 10 into the air inlet sub-duct 101 and the air outlet sub-duct 102 located on opposite sides of the partition 106 respectively.

[0078] In a specific example, Figure 6 and Figure 7 As shown, the partition 106 can be set at any angle, horizontally, vertically, or tilted. The size of the two space sections divided by the partition 106 can also be set arbitrarily. According to actual use, the cross section of the air inlet sub-channel 101 can be selectively set to be larger than the air inlet sub-channel 101, or the cross section of the air inlet sub-channel 101 can be set to be larger than the air outlet sub-channel 102.

[0079] In some of the embodiments, the first on-off valve 104 is hinged to the upper end of the air inlet duct 101. In this embodiment, the upper end refers to the upper end in the direction of gravity, and the lower end also refers to the lower end in the direction of gravity. In a specific example, the upper end of the air inlet duct 101 may be the top of the entire air duct 10. When the partition 106 is located above the air inlet duct 101 in the direction of gravity, the upper end of the air inlet duct 101 may also be the partition 106. A first limit member 107 is provided at the lower end of the air inlet duct 101. In the air intake mode, the motor rotates forward, and the motor body 110 drives the air intake fan 109 to rotate. The air flows in the direction of Figure 4 As shown, the air flow drives the first opening and closing valve 104 to rotate along the hinge point with the upper end of the air inlet sub-channel 101. At this time, the first opening and closing valve 104 moves away from the first limiter 107, and the first limiter 107 does not affect the first opening and closing valve 104. In the exhaust mode, the motor reverses, and the motor body 110 drives the exhaust fan 111 to rotate. The air flow direction is as shown in FIG. Figure 5 As shown, the air flow drives the first opening and closing valve 104 to rotate toward the first limiting member 107, and the first opening and closing valve 104 is blocked by the first limiting member 107 so that the first opening and closing valve 104 contacts the first limiting member 107, so that the air inlet duct 101 is closed.

[0080] The second on-off valve 105 is hinged to the upper end of the air inlet duct 101. In this embodiment, the upper end refers to the upper end in the direction of gravity, and the lower end also refers to the lower end in the direction of gravity. In a specific example, the upper end of the air inlet duct 101 can be the top of the entire air duct 10. When the partition 106 is located above the air inlet duct 101 in the direction of gravity, the upper end of the air inlet duct 101 can also be the partition 106. A second limit member 108 is provided at the lower end of the air inlet duct 101. In the exhaust mode, the motor reverses, and the motor body 110 drives the exhaust fan 111 to rotate. The air flows in the direction of Figure 5As shown, the air flow drives the second opening and closing valve 105 to rotate along the hinge point with the upper end of the air inlet channel 101. At this time, the second opening and closing valve 105 moves away from the second limiter 108, and the second limiter 108 does not affect the second opening and closing valve 105. In the air intake mode, the motor rotates forward, and the motor body 110 drives the air intake fan 109 to rotate. The air flow direction is as shown in FIG. Figure 4 As shown, the air flow drives the second opening and closing valve 105 to rotate toward the second limiting member 108, and the second opening and closing valve 105 is blocked by the second limiting member 108 so that the second opening and closing valve 105 contacts the second limiting member 108, so that the air inlet duct 101 is closed.

[0081] This embodiment also provides a computer-readable storage medium having computer-readable instructions stored thereon, and the computer program is loaded by a processor to execute the steps of the method for detecting dirt and blockage of the fresh air air conditioning filter 103 described in any one of the above embodiments.

[0082] The above is a detailed introduction to a fresh air air conditioning filter blockage detection method, a control method and a fresh air air conditioner provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for detecting dirty or blocked fresh air air conditioner filter, characterized in that: include: Acquire current data of an influencing factor, where the influencing factor is a factor that affects a target theoretical rate of change of indoor carbon dioxide concentration, and the influencing factor includes at least one of the number of indoor animals, a difference in indoor and outdoor carbon dioxide concentration, and a motor speed; Determine the target theoretical change rate of indoor carbon dioxide concentration according to the current data of the influencing factor, wherein the target theoretical change rate is the change rate of indoor carbon dioxide concentration corresponding to the current data of the influencing factor when fresh air is turned on and the filter is not dirty or blocked; Determining the target theoretical rate of change of indoor carbon dioxide concentration includes: Determining the rate of increase of indoor carbon dioxide concentration according to the number of animals in the room; Determining a target theoretical rate of change of indoor carbon dioxide according to the indoor carbon dioxide concentration increase rate and a preset air volume of the fresh air air conditioner; Correcting the target theoretical rate of change according to the animal movement speed and / or the service life of the air conditioner to obtain a corrected target theoretical rate of change; Get the actual rate of change of indoor carbon dioxide concentration when fresh air is turned on; comparing the actual rate of change with the target theoretical rate of change; When it is determined that the actual change rate is lower than the target theoretical change rate, it is determined that the fresh air air conditioning filter is dirty and clogged.

2. The method for detecting dirty or blocked fresh air air conditioner filter according to claim 1, characterized in that: Before obtaining the current data of the impact factor, the method further includes: Make sure the fresh air is turned on for the preset time.

3. The method for detecting dirty or blocked fresh air air conditioner filter according to claim 1, characterized in that: After determining that the fresh air air conditioner filter is dirty and blocked, the method further includes: determining a difference between the actual rate of change and the target theoretical rate of change; The degree of dirtiness of the filter is obtained by comparing the difference with a preset relationship table; The preset relationship table is a correspondence between the difference range and the dirtiness.

4. A control method for a fresh air air conditioner, characterized in that: include: Acquire current data of an influencing factor, where the influencing factor affects a target theoretical rate of change of indoor carbon dioxide concentration, and the influencing factor includes at least one of the number of indoor animals, indoor and outdoor carbon dioxide concentration difference, and motor speed; Determine, based on current data of the influencing factors, a target theoretical rate of change of indoor carbon dioxide concentration when the fresh air function is turned on; According to the current data of the influencing factors, the target theoretical change rate of indoor carbon dioxide concentration when the fresh air function is turned on is determined to include: Determining the rate of increase of indoor carbon dioxide concentration according to the number of animals in the room; Determining a target theoretical rate of change of indoor carbon dioxide according to the indoor carbon dioxide concentration increase rate and a preset air volume of the fresh air air conditioner; Correcting the target theoretical rate of change according to the animal movement speed and / or the service life of the air conditioner to obtain a corrected target theoretical rate of change; Get the actual rate of change of indoor carbon dioxide concentration when the fresh air function is turned on; comparing the actual rate of change with the target theoretical rate of change; When it is determined that the actual change rate is lower than the target theoretical change rate, it is determined that the fresh air air conditioning filter is dirty and blocked; Switch the fresh air air conditioner from intake mode to exhaust mode.

5. The control method of the fresh air air conditioner according to claim 4, characterized in that: After determining that the filter screen of the fresh air air conditioner is dirty and blocked, and before switching the fresh air air conditioner from an air intake mode to an air exhaust mode, the method further includes: determining a difference between the actual rate of change and the target theoretical rate of change; The degree of dirtiness of the filter is obtained by comparing the difference with a preset relationship table; The step of switching the fresh air air conditioner from an air intake mode to an air exhaust mode comprises: When the dirtiness of the fresh air air conditioner filter reaches a preset level, switch the fresh air air conditioner from intake mode to exhaust mode.

6. A fresh air air conditioner, characterized in that: It includes a memory, a processor and a data acquisition device, and the data acquisition device is configured to collect data of the influencing factors; the memory stores a computer program, and when the computer program is executed by the processor, the fresh air air conditioning filter dirty blockage detection method described in any one of claims 1 to 3 is implemented.

7. The fresh air air conditioner according to claim 6, characterized in that: The fresh air air conditioner also includes an air transmission device, which includes an air duct. At least part of the section of the air duct is provided with side-by-side air inlet sub-ducts and air outlet sub-ducts; a first opening and closing valve is provided on the air inlet sub-duct, and a filter is provided in the air inlet sub-duct; a second opening and closing valve is provided on the air outlet sub-duct.

8. The fresh air air conditioner according to claim 7, characterized in that: The air duct is provided with a partition on at least a part of the section, the partition is connected to the side walls on two opposite sides of the air duct, and the air inlet sub-channel and the air outlet sub-channel are respectively located on two opposite sides of the partition.

9. The fresh air air conditioner according to claim 8, characterized in that: The first opening and closing valve is hinged to the upper end of the air inlet sub-channel, and a first limiter is provided at the lower end of the air inlet sub-channel. In the air inlet mode, the air flow drives the first opening and closing valve to rotate away from the first limiter, and the air inlet sub-channel is connected; in the air exhaust mode, the air flow drives the first opening and closing valve to rotate toward the first limiter, and the air inlet sub-channel is closed. The second opening and closing valve is hinged to the upper end of the air inlet sub-channel, and a second limit piece is provided at the lower end of the air inlet sub-channel. In the exhaust mode, the air flow drives the second opening and closing valve to rotate away from the second limit piece, and the air inlet sub-channel is connected; in the air intake mode, the air flow drives the second opening and closing valve to rotate toward the second limit piece, and the air inlet sub-channel is closed.

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