Control method for air conditioning system, air conditioning system, and storage medium

Abstract

The invention discloses a control method of an air conditioning system, the air conditioning system and a storage medium. The air conditioning system comprises an air conditioner and a fresh air machine, the air conditioner is provided with an aldehyde removal filter screen, and the method comprises the steps that the air conditioner is controlled to operate in a heating mode, and a first formaldehyde state parameter in an indoor space is detected; the fresh air ventilator is controlled to increase the air exchange amount, and a second formaldehyde state parameter in the indoor space is detected; and determining whether the formaldehyde removal filter screen fails or not according to the first formaldehyde state parameter and the second formaldehyde state parameter. The invention aims to improve the accuracy of determining the failure of the aldehyde removal filter screen.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning systems, and in particular to a control method for an air conditioning system, an air conditioning system, and a storage medium. Background Art

[0002] An air purifying filter for removing formaldehyde in the air is generally provided in an air conditioner. The air purifying filter is likely to fail after a long period of use, affecting the formaldehyde removal effect.

[0003] Currently, generally, during the operation of the air conditioner, the change of formaldehyde in the air is detected for a period of time. When no change in formaldehyde is detected, it is considered that the formaldehyde removal effect of the filter is poor and the filter is determined to have failed; when a large change in formaldehyde is detected, it is considered that the formaldehyde removal effect of the filter is good and the filter is determined not to have failed. However, when the formaldehyde release amount in the room is equivalent to the formaldehyde removal amount of the filter, it is easy to have a situation where there is no change in indoor formaldehyde, resulting in misjudgment of the failure of the filter. Summary of the Invention

[0004] The main object of the present invention is to provide a control method for an air conditioning system, an air conditioning system, and a storage medium, aiming to improve the accuracy of determining the failure of the formaldehyde removal filter.

[0005] To achieve the above object, the present invention provides a control method for an air conditioning system. The air conditioning system includes an air conditioner and a fresh air fan. The air conditioner is provided with a formaldehyde removal filter. The control method for the air conditioning system includes the following steps:

[0006] Control the air conditioner to operate in a heating mode, and detect the first formaldehyde state parameter in the indoor space;

[0007] Control the fresh air fan to increase the air change rate, and detect the second formaldehyde state parameter in the indoor space;

[0008] Determine whether the formaldehyde removal filter has failed according to the first formaldehyde state parameter and the second formaldehyde state parameter.

[0009] Optionally, after the step of detecting the first formaldehyde state parameter in the indoor space, the method further includes:

[0010] When the first formaldehyde state parameter meets a preset condition, execute the step of controlling the fresh air fan to increase the air change rate and detecting the second formaldehyde state parameter in the indoor space;

[0011] The preset condition indicates that the formaldehyde removal filter has a risk of failure.

[0012] Optionally, the first formaldehyde state parameter includes a first formaldehyde concentration and a second formaldehyde concentration detected at intervals of a preset time duration, and the preset condition includes that a first concentration difference between the first formaldehyde concentration and the second formaldehyde concentration is less than or equal to a first preset threshold.

[0013] Optionally, the control method of the air conditioning system further includes:

[0014] Obtain a temperature change value of the air conditioner adjusting the indoor space during the detection process of the first formaldehyde state parameter;

[0015] Determine the first preset threshold according to the temperature change value.

[0016] Optionally, the second formaldehyde state parameter includes a third formaldehyde concentration, and the step of determining whether the formaldehyde removal filter is invalid according to the first formaldehyde state parameter and the second formaldehyde state parameter includes:

[0017] Determine a second concentration difference between the third formaldehyde concentration and the second formaldehyde concentration;

[0018] When the second concentration difference is greater than a second preset threshold, determine that the formaldehyde removal filter is invalid;

[0019] When the second concentration difference is less than or equal to the second preset threshold, determine that the formaldehyde removal filter is effective.

[0020] Optionally, the air conditioning system further includes:

[0021] Obtain a first air change rate of the fresh air fan during the detection process of the first formaldehyde state parameter and a second air change rate of the fresh air fan during the detection process of the second formaldehyde state parameter;

[0022] Determine the second preset threshold according to the first air change rate and the second air change rate.

[0023] Optionally, after the step of detecting the first formaldehyde state parameter in the indoor space, it further includes:

[0024] When the first formaldehyde state parameter does not meet the preset condition, determine that the formaldehyde removal filter is effective.

[0025] Optionally, during the execution of the step of controlling the air conditioner to operate in the heating mode, it further includes:

[0026] Control the fresh air fan to operate at a speed less than or equal to a preset speed.

[0027] Optionally, after the step of controlling the air conditioner to operate in the heating mode, it further includes:

[0028] When the temperature change value of the indoor space is less than a first preset value and / or the humidity change value of the indoor space is less than a second preset value, detect a first formaldehyde state parameter in the indoor space.

[0029] In addition, to achieve the above object, the present application further provides an air conditioning system, the air conditioning system includes a control device, an air conditioner and the fresh air machine, and the air conditioner is provided with a formaldehyde removal filter screen;

[0030] Both the air conditioner and the fresh air machine are connected to the control device, and the control device includes: a memory, a processor, and a control program of the air conditioning system stored on the memory and executable on the processor. When the control program of the air conditioning system is executed by the processor, the steps of the control method of the air conditioning system described in any one of the above are implemented.

[0031] In addition, to achieve the above object, the present application further provides a storage medium, on which a control program of the air conditioning system is stored. When the control program of the air conditioning system is executed by a processor, the steps of the control method of the air conditioning system described in any one of the above are implemented.

[0032] A method of an air conditioning system proposed by the present invention first detects a first formaldehyde state parameter of the indoor space during the heating operation of the air conditioner, and then detects a second formaldehyde state parameter of the indoor space during the process of the fresh air machine increasing the ventilation volume to discharge formaldehyde in the indoor space outdoors. Combine the first formaldehyde state parameter and the second formaldehyde state parameter to determine whether the formaldehyde removal filter screen in the air conditioner fails. During this process, the formaldehyde removal efficiency indoors will be different before and after the fresh air machine increases the exhaust air volume. Therefore, combining the formaldehyde state parameters detected in the two previous and subsequent stages to determine whether the formaldehyde removal filter screen fails can effectively eliminate the influence of the formaldehyde release state of the items releasing formaldehyde in the indoor space itself on the detection results, thereby effectively improving the accuracy of the determination of the failure of the formaldehyde removal filter screen. Description of the Drawings

[0033] Figure 1 It is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioning system of the present invention;

[0034] Figure 2 It is a schematic flowchart of an embodiment of the control method of the air conditioning system of the present invention;

[0035] Figure 3 It is a schematic flowchart of another embodiment of the control method of the air conditioning system of the present invention;

[0036] Figure 4 It is a schematic flowchart of still another embodiment of the control method of the air conditioning system of the present invention.

[0037] The implementation, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] An embodiment of the present invention provides an air conditioning system.

[0040] In the embodiment of the present invention, with reference to Figure 1 , the air conditioning system includes a control device 100, an air conditioner 200, a fresh air unit 300 and a formaldehyde removal filter 400. The air conditioner 200 and the fresh air unit 300 are both connected to the control device 100. The air conditioner 200 is provided with the formaldehyde removal filter 400.

[0041] In this embodiment, the air conditioner 200 is a multi-connected air conditioner. The air conditioner 200 is used to adjust the temperature of at least two indoor spaces. The multi-connected air conditioner includes at least two indoor units, which are respectively arranged in different indoor spaces to adjust the air in different indoor spaces. Among them, each indoor unit includes an indoor heat exchanger and a control valve connected in series with the indoor heat exchanger. An indoor fan is correspondingly arranged for the indoor heat exchanger. In some embodiments, the air conditioner 200 may also be an air conditioner 200 independently arranged in a space, such as a cabinet air conditioner, a window air conditioner, a wall-mounted air conditioner, etc.

[0042] In this embodiment, the fresh air unit 300 can introduce outdoor fresh air into the room and discharge the indoor air to the outside. The fresh air unit 300 is used to adjust the fresh air of at least two indoor spaces. The fresh air unit 300 may include more than one air outlet module, which are respectively arranged in different indoor spaces to adjust the air in different indoor spaces. In some embodiments, the fresh air unit 300 may also be a fresh air device independently arranged in a space.

[0043] In this embodiment, the formaldehyde removal filter 400 is used to adsorb formaldehyde in the indoor space. The formaldehyde removal filter 400 can be arranged at the air return opening of the indoor unit.

[0044] Further, with reference to Figure 1 , the air conditioning system further includes an environment detection module 500 connected to the control device 100, which may include an indoor detection module and / or an outdoor detection module, and is used to detect the air state parameters (such as temperature, air pressure, humidity, etc.) indoors and / or outdoors. Among them, when the air conditioner 200 is a multi-connected air conditioner, each indoor unit can be provided with an indoor detection module, and specifically, the indoor detection module can be arranged at the air return opening of the indoor unit.

[0045] Further, with reference to Figure 1, the air conditioning system further includes a formaldehyde detection module 600 connected to the control device 100, which can be used to detect the formaldehyde state parameters of the indoor space, such as formaldehyde concentration, formaldehyde content, etc.

[0046] In the embodiment of the present invention, referring to Figure 1 , the control device 100 of the air conditioning system includes: a processor 1001, such as a CPU, a memory 1002, and a timer 1003. Among them, these components are connected and communicate with each other through a communication bus. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art can understand that Figure 1 the device structure shown in

[0048] does not constitute a limitation to the device, and may include more or fewer components than shown in the figure, or combine some components, or arrange different components. Figure 1 As shown in

[0049] In Figure 1 the device shown, the processor 1001 can be used to call the control program of the air conditioning system stored in the memory 1002 and execute the relevant step operations of the control method of the air conditioning system in the following embodiments.

[0050] The embodiment of the present invention also provides a control method for an air conditioning system, which is applied to the above air conditioning system.

[0051] Referring to Figure 2 , an embodiment of the control method of the air conditioning system of the present application is proposed. In this embodiment, the control method of the air conditioning system includes:

[0052] Step S10, control the air conditioner to operate in the heating mode and detect the first formaldehyde state parameter in the indoor space;

[0053] Specifically, the air conditioner can be controlled to operate in the heating mode by preset heating control parameters.

[0054] During the process of the air conditioner operating in the heating mode, when the preset conditions are met, the first formaldehyde state parameter can be detected.

[0055] The first formaldehyde state parameter includes one or more formaldehyde concentration values and / or one or more formaldehyde change values.

[0056] During the operation of the air conditioner in heating mode, the fresh air fan can be turned on or off, and when the fresh air fan is turned on, it runs at a fixed air volume. In this embodiment, the process of executing the step of controlling the air conditioner to run in heating mode also includes: controlling the fresh air fan to run at a speed less than or equal to a preset speed. Specifically, the fresh air fan can be turned off or run at the lowest speed.

[0057] Step S20, controlling the fresh air fan to increase ventilation volume, and detecting a second formaldehyde state parameter in the indoor space;

[0058] When the fresh air fan is in the off state, the fresh air fan can be controlled to be turned on; when the fresh air fan is in the on state, the fresh air fan can be controlled to increase the ventilation volume. In this embodiment, the fresh air fan is controlled to increase the ventilation volume to operate. In other embodiments, the increase value of the fresh air fan air volume can be determined according to the first formaldehyde state parameter and the outdoor air state parameter (outdoor temperature and / or outdoor humidity and / or outdoor enthalpy value, etc.), and the fresh air fan is controlled to increase the ventilation volume according to the increase value.

[0059] During the detection process of the second formaldehyde status parameter, the fresh air fan operates at a fixed air volume. The second formaldehyde status parameter includes one or more formaldehyde concentration values ​​and / or one or more formaldehyde change values.

[0060] Step S30, determining whether the formaldehyde removal filter is invalid according to the first formaldehyde state parameter and the second formaldehyde state parameter.

[0061] In one implementation, the relationship between the first formaldehyde state parameter and the second formaldehyde state parameter is determined, and whether the formaldehyde removal filter is invalid is determined based on the relationship.

[0062] In another implementation, the failure characteristic value is calculated by the first formaldehyde state parameter and the second formaldehyde state parameter, and the parameter interval where the failure characteristic value is located is determined. In the first interval, the formaldehyde removal filter is determined to be failed, and in the second interval, the formaldehyde removal filter is determined to be effective.

[0063] In this embodiment, when it is determined that the formaldehyde removal filter is ineffective, the air conditioning system can be controlled to output a prompt message to prompt the user to replace the formaldehyde removal filter.

[0064] In another implementation, the first parameter interval where the first formaldehyde state parameter is located can be determined, the second parameter interval where the second formaldehyde state parameter is located can be determined, the relationship value between the first formaldehyde state parameter and the second formaldehyde state parameter can be determined, and whether the formaldehyde removal filter is invalid can be determined based on the first parameter interval, the second parameter interval and the relationship value.

[0065] A control method for an air conditioning system proposed in an embodiment of the present invention. In this method, first, during the heating operation of the air conditioner, the first formaldehyde state parameter of the indoor space is detected. Then, during the process of the fresh air machine increasing the ventilation volume to discharge formaldehyde in the indoor space outdoors, the second formaldehyde state parameter of the indoor space is detected. By combining the first formaldehyde state parameter and the second formaldehyde state parameter to determine whether the formaldehyde removal filter in the air conditioner fails. During this process, the formaldehyde removal efficiency in the room will be different before and after the fresh air machine increases the exhaust air volume. Therefore, by combining the formaldehyde state parameters detected in the two previous and subsequent stages to determine whether the formaldehyde removal filter fails, it can effectively eliminate the influence of the formaldehyde release state of the items releasing formaldehyde in the indoor space itself on the detection result, thereby effectively improving the accuracy of determining the failure of the formaldehyde removal filter.

[0066] Further, in this embodiment, after the step of controlling the fresh air machine to increase the ventilation volume, the following is also included:

[0067] When the temperature change value of the indoor space is less than the first preset value and / or the humidity change value of the indoor space is less than the second preset value, the first formaldehyde state parameter in the indoor space is detected.

[0068] Among them, when the fresh air machine is turned on, after controlling the air conditioner to operate in the heating mode and controlling the fresh air machine to operate at a speed less than or equal to the preset speed, the step of detecting the first formaldehyde state parameter in the indoor space when the temperature change value of the indoor space is less than the first preset value and / or the humidity change value of the indoor space is less than the second preset value is executed.

[0069] When the temperature change value of the indoor space is less than the first preset value and / or the humidity change value of the indoor space is less than the second preset value, the first formaldehyde concentration can be detected, the preset duration can be detected, and the second formaldehyde concentration can be detected. The first formaldehyde state parameter includes the first formaldehyde concentration and the second formaldehyde concentration.

[0070] In this embodiment, when the temperature and humidity in the indoor space reach a stable state, then detecting the first formaldehyde state parameter can effectively avoid the influence of indoor temperature and humidity fluctuations on the process of determining the failure of the formaldehyde removal filter, thereby further improving the accuracy of determining the failure of the formaldehyde removal filter.

[0071] Further, in this embodiment, after the step of controlling the air conditioner to operate in the heating mode, the following is also included:

[0072] When the temperature change value of the indoor space is less than the third preset value and / or the humidity change value of the indoor space is less than the fourth preset value, the second formaldehyde state parameter in the indoor space is detected.

[0073] When the temperature change value of the indoor space is less than a third preset value and / or the humidity change value of the indoor space is less than a fourth preset value, a third formaldehyde concentration can be detected, and the second formaldehyde state parameter includes the third formaldehyde concentration.

[0074] In this embodiment, when the temperature and humidity in the indoor space reach a stable state, and then the second formaldehyde state parameter is detected, it can effectively avoid the influence of indoor temperature and humidity fluctuations on the determination process of the formaldehyde removal filter failure, thereby further improving the accuracy of the formaldehyde removal filter failure determination.

[0075] Further, based on the above embodiment, another embodiment of the control method of the air conditioning system of the present application is proposed. In this embodiment, referring to Figure 3 , after step S10, it further includes:

[0076] Step S201, when the first formaldehyde state parameter meets a preset condition, execute the step of controlling the fresh air fan to increase the ventilation volume and detecting the second formaldehyde state parameter in the indoor space; the preset condition indicates that the formaldehyde removal filter has a risk of failure.

[0077] Here, having a risk of failure refers to a situation with a relatively high probability of failure.

[0078] The preset condition is specifically the target interval that the first formaldehyde state parameter needs to reach or the target relationship that needs to be reached with the target threshold when the formaldehyde removal filter has a risk of failure.

[0079] In this embodiment, the first formaldehyde state parameter includes the first formaldehyde concentration and the second formaldehyde concentration detected successively at a preset time interval, and the preset condition includes that the first concentration difference between the first formaldehyde concentration and the second formaldehyde concentration is less than or equal to a first preset threshold. When the first concentration difference is less than or equal to the first preset threshold, it may be the result of the failure of the formaldehyde removal filter, or it may be due to the low formaldehyde concentration or fast release rate of the formaldehyde-releasing objects in the indoor space. Therefore, at this time, it is considered that there is a certain probability of formaldehyde removal failure, and it is determined that the formaldehyde removal filter has a risk of failure.

[0080] Step S202, when the first formaldehyde state parameter does not meet the preset condition, determine that the formaldehyde removal filter is effective.

[0081] In this embodiment, after first determining that the formaldehyde removal filter has a risk of failure through the first formaldehyde state parameter, and then entering the second stage to detect the second formaldehyde state parameter, it is beneficial to ensure the accuracy of determining whether the formaldehyde removal filter fails while improving the efficiency of determining whether the formaldehyde removal filter fails.

[0082] In other embodiments, when the first formaldehyde state parameter does not meet the preset conditions, the heating capacity of the air conditioner can also be reduced, and the process returns to step S10. After reducing the indoor formaldehyde release rate, it is determined again whether the formaldehyde removal filter has a risk of failure through the first formaldehyde state parameter. When there is no risk of failure, it is determined that the formaldehyde removal filter is effective.

[0083] Furthermore, in order to improve the accuracy of the failure risk determination, the control method of the air conditioning system further includes: obtaining the temperature change value of the indoor space adjusted by the air conditioner during the detection of the first formaldehyde state parameter; determining the first preset threshold according to the temperature change value.

[0084] Different temperature change values correspond to different first preset thresholds. The first preset threshold may be positively correlated with the temperature change value. Specifically, the first preset threshold can be calculated by substituting the temperature change value into a formula. Or, the first preset threshold can be determined according to the interval where the temperature change value is located.

[0085] Furthermore, based on any of the above embodiments, another embodiment of the control method of the air conditioning system of the present application is proposed. In this embodiment, the second formaldehyde state parameter includes the third formaldehyde concentration. Referring to Figure 4 , the step S30 includes:

[0086] Step S31, determining the second concentration difference between the third formaldehyde concentration and the second formaldehyde concentration;

[0087] Step S32, when the second concentration difference is greater than the second preset threshold, determining that the formaldehyde removal filter is invalid;

[0088] Step S33, when the second concentration difference is less than or equal to the second preset threshold, determining that the formaldehyde removal filter is effective.

[0089] The second preset threshold is specifically the critical value of the second concentration difference for distinguishing whether the formaldehyde removal filter is invalid.

[0090] The second preset threshold can be a preset fixed value or a threshold determined according to the actual operating state of the air conditioning system.

[0091] In this embodiment, in the second stage, when the second concentration difference is large after the ventilation volume of the fresh air machine is increased, it indicates that the indoor formaldehyde concentration fluctuates greatly under the action of fresh air. At this time, excluding the reasons that the concentration of the formaldehyde-releasing item itself is low or the release rate is low, which result in the small first concentration difference in the first stage, it can be determined that the filter screen is in an ineffective state, resulting in a poor formaldehyde removal effect in the first stage. When the second concentration difference is small after the ventilation volume of the fresh air machine is increased, it can be considered that it is indeed due to the low concentration or low release rate of the formaldehyde-releasing item itself that causes the small change in the indoor formaldehyde concentration. At this time, it is determined that the filter screen is in an effective state. Based on this, it can be accurately determined whether the formaldehyde removal filter screen is in an ineffective state, so as to effectively improve the accuracy of the determination of the ineffectiveness of the formaldehyde removal filter screen.

[0092] In other embodiments, it is also possible to determine whether the formaldehyde removal filter screen is ineffective according to the difference or ratio between the second concentration difference and the second preset threshold. Or, the second formaldehyde state parameter includes the third formaldehyde concentration and the fourth formaldehyde concentration detected at intervals of a preset time. The third concentration difference between the third formaldehyde concentration and the fourth formaldehyde concentration is determined, and it is determined whether the formaldehyde removal filter screen is ineffective according to the difference between the third concentration difference and the first concentration difference. When the difference is greater than the third preset threshold, it is determined that the formaldehyde removal filter screen is ineffective; when the difference is less than or equal to the third preset threshold, it is determined that the formaldehyde removal filter screen is effective.

[0093] Further, in this embodiment, in order to further improve the accuracy of the determination of the ineffectiveness of the formaldehyde removal filter screen, the air conditioning system further includes: obtaining the first ventilation volume of the fresh air machine during the detection of the first formaldehyde state parameter and the second ventilation volume of the fresh air machine during the detection of the second formaldehyde state parameter; determining the second preset threshold according to the first ventilation volume and the second ventilation volume.

[0094] Different first ventilation volumes and different second ventilation volumes correspond to different second preset thresholds.

[0095] Specifically, the second preset threshold can be calculated by substituting the first ventilation volume and the second ventilation volume into a preset formula. Or, the first air volume interval where the first ventilation volume is located can be determined, the second air volume interval where the second ventilation volume is located can be determined, and the second preset threshold can be determined according to the first air volume interval and the second air volume interval.

[0096] Further, it is also possible to obtain the first indoor air state parameter and the first outdoor air state parameter during the detection of the first formaldehyde state parameter, obtain the second indoor air state parameter and the second outdoor air state parameter during the detection of the second formaldehyde state parameter, and determine the second preset threshold according to the first indoor air state parameter, the first outdoor air state parameter, the second indoor air state parameter, the second outdoor air state parameter, the first ventilation volume, and the second ventilation volume.

[0097] In this embodiment, the second preset threshold for distinguishing whether the formaldehyde removal filter is invalid is determined by combining the ventilation volume of the fresh air fan during the formaldehyde state parameter detection process in the two stages, which is conducive to avoiding the fluctuation of the formaldehyde release efficiency and the formaldehyde removal efficiency during the ventilation process from affecting the accuracy of the invalidation judgment, thereby further improving the accuracy of the invalidation judgment of the formaldehyde removal filter.

[0098] In addition, an embodiment of the present invention further provides a storage medium, on which a control program of an air conditioning system is stored. When the control program of the air conditioning system is executed by a processor, the relevant steps of any embodiment of the control method of the air conditioning system are implemented.

[0099] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of more restrictions, an element defined by the sentence "comprises one..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0100] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0101] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, or by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioning system, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0102] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A control method for an air conditioning system, characterized in that: The air conditioning system comprises an air conditioner and a fresh air blower, the air conditioner is provided with a formaldehyde removal filter, and the control method of the air conditioning system comprises the following steps: Controlling the air conditioner to operate in a heating mode and detecting a first formaldehyde state parameter in the indoor space; Controlling the fresh air fan to increase ventilation volume, and detecting a second formaldehyde state parameter in the indoor space; Whether the formaldehyde removal filter is invalid is determined according to the first formaldehyde status parameter and the second formaldehyde status parameter.

2. The control method of the air conditioning system according to claim 1, characterized in that: After the step of detecting the first formaldehyde state parameter in the indoor space, the method further includes: When the first formaldehyde status parameter meets a preset condition, executing the step of controlling the fresh air fan to increase the ventilation volume and detecting the second formaldehyde status parameter in the indoor space; The preset condition indicates that the formaldehyde removal filter has a risk of failure.

3. The control method of the air conditioning system according to claim 2, characterized in that: The first formaldehyde state parameter includes a first formaldehyde concentration and a second formaldehyde concentration detected successively at a preset time interval, and the preset condition includes a first concentration difference between the first formaldehyde concentration and the second formaldehyde concentration being less than or equal to a first preset threshold.

4. The control method of the air conditioning system according to claim 3, characterized in that: The control method of the air conditioning system further includes: Acquire the temperature change value of the indoor space regulated by the air conditioner during the first formaldehyde state parameter detection process; The first preset threshold is determined according to the temperature change value.

5. The control method of the air conditioning system according to claim 3, characterized in that: The second formaldehyde state parameter includes a third formaldehyde concentration, and the step of determining whether the formaldehyde removal filter is invalid according to the first formaldehyde state parameter and the second formaldehyde state parameter includes: determining a second concentration difference between the third formaldehyde concentration and the second formaldehyde concentration; When the second concentration difference is greater than a second preset threshold, determining that the formaldehyde removal filter is invalid; When the second concentration difference is less than or equal to the second preset threshold, it is determined that the formaldehyde removal filter is effective.

6. The control method of the air conditioning system according to claim 5, characterized in that: The air conditioning system further comprises: Acquire a first ventilation volume of the fresh air fan during the first formaldehyde state parameter detection process and a second ventilation volume of the fresh air fan during the second formaldehyde state parameter detection process; The second preset threshold is determined according to the first ventilation volume and the second ventilation volume.

7. The control method of the air conditioning system according to claim 2, characterized in that: After the step of detecting the first formaldehyde state parameter in the indoor space, the method further includes: When the first formaldehyde status parameter does not meet the preset condition, it is determined that the formaldehyde removal filter is effective.

8. The control method of an air conditioning system according to any one of claims 1 to 7, characterized in that: The process of controlling the air conditioner to operate in the heating mode further includes: The fresh air fan is controlled to operate at a speed less than or equal to a preset speed.

9. The control method of an air conditioning system according to any one of claims 1 to 7, characterized in that: After the step of controlling the air conditioner to operate in heating mode, the method further includes: When the temperature change value of the indoor space is less than a first preset value, and / or the humidity change value of the indoor space is less than a second preset value, a first formaldehyde state parameter in the indoor space is detected.

10. An air conditioning system, characterized in that: The air conditioning system comprises a control device, an air conditioner and a fresh air blower, wherein the air conditioner is provided with a formaldehyde removal filter; The air conditioner and the fresh air fan are both connected to the control device, which includes: a memory, a processor, and a control program for the air conditioning system stored in the memory and executable on the processor, wherein the control program for the air conditioning system implements the steps of the control method for the air conditioning system as described in any one of claims 1 to 9 when executed by the processor.

11. A storage medium, characterized in that: The storage medium stores a control program of an air conditioning system, and when the control program of the air conditioning system is executed by a processor, the steps of the control method of the air conditioning system according to any one of claims 1 to 9 are implemented.

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