air conditioner

Abstract

This invention relates to an air conditioner, belonging to the field of air conditioning technology. The air conditioner includes: a housing, a heat exchange fan, an indoor heat exchanger, a fresh air fan, a formaldehyde removal module, a formaldehyde detector, and a controller. The controller is configured to: control the formaldehyde detector to acquire the current formaldehyde content value at preset time intervals; fit multiple current formaldehyde content values ​​to form a formaldehyde release curve and configure it in a coordinate system; determine an inflection point on the formaldehyde release curve according to a preset slope; set a threshold point in the coordinate system; if the vertical coordinate of the threshold point is less than the vertical coordinate of the inflection point, enter a first mode; if the vertical coordinate of the threshold point is equal to the vertical coordinate of the inflection point, enter a second mode; if the vertical coordinate of the threshold point is greater than the vertical coordinate of the inflection point, enter a third mode.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and more particularly to an air conditioner. Background Technology

[0002] Currently, with the improvement of people's living standards, health is becoming an increasingly important factor in the home environment. In the home appliance market, more and more appliances are being developed around the theme of health. Formaldehyde is one of the main pollutants in indoor decoration and renovation. Due to its characteristics of high latency, long release period, and high toxicity, efficient formaldehyde removal has become a hot topic in recent years. Indoor formaldehyde exists mainly in three forms: free, adsorbed, and solidified. Solidified formaldehyde can be released into the air as free formaldehyde, or it can be adsorbed in curtains and carpets after release. Free formaldehyde can be inhaled by humans.

[0003] An air conditioner, also known as an air conditioning unit, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow within a building or structure. Air conditioners typically consist of an indoor unit and an outdoor unit. Some air conditioners have formaldehyde removal capabilities; however, currently, formaldehyde removal via air conditioning relies on a single method, resulting in low efficiency and high energy consumption. Summary of the Invention

[0004] This invention at least partially solves one of the technical problems in the related art.

[0005] Therefore, this application aims to provide an air conditioner that, by detecting the indoor formaldehyde content, fits a formaldehyde release curve, determines the formaldehyde release rate by the inflection point, and enters different modes based on the relationship between the inflection point and the threshold point, selecting the corresponding mode for different scenarios, thereby improving formaldehyde removal efficiency while reducing energy consumption.

[0006] To achieve the above objectives, the present invention provides an air conditioner, comprising:

[0007] The housing has a heat exchange outlet and a fresh air outlet.

[0008] A heat exchange fan is disposed inside the housing and is used to deliver air conditioning air to the room through the heat exchange outlet.

[0009] An indoor heat exchanger is a device that allows heat exchange between the refrigerant flowing inside and the air to form a heating or cooling cycle.

[0010] A fresh air fan is installed inside the housing and is used to deliver outdoor fresh air to the room through the fresh air outlet.

[0011] A formaldehyde removal module is disposed within the housing and is used to remove formaldehyde.

[0012] A formaldehyde detector, used to detect indoor formaldehyde to obtain the current formaldehyde content value;

[0013] The controller is configured to: control the formaldehyde detector to acquire the current formaldehyde content value at preset time intervals; fit multiple current formaldehyde content values ​​to form a formaldehyde release curve and configure it in a coordinate system; determine the inflection point on the formaldehyde release curve according to a preset slope; set a threshold point in the coordinate system; if the vertical axis coordinate of the threshold point is less than the vertical axis coordinate of the inflection point, then enter the first mode; if the vertical axis coordinate of the threshold point is equal to the vertical axis coordinate of the inflection point, then enter the second mode; if the vertical axis coordinate of the threshold point is greater than the vertical axis coordinate of the inflection point, then enter the third mode.

[0014] In this technical solution, the formaldehyde content in the room is detected, and a formaldehyde release curve is fitted. The release rate of formaldehyde is determined by the inflection point. Different modes are entered based on the relationship between the inflection point and the threshold point. The corresponding mode is selected for different scenarios to improve formaldehyde removal efficiency while reducing energy consumption.

[0015] In some embodiments of this application, the controller is configured to enter a fourth mode if the maximum value of the vertical axis coordinate in the formaldehyde release curve is less than the vertical axis coordinate of the threshold point.

[0016] In the technical solution, if the maximum value of the vertical axis of the formaldehyde release curve is less than the vertical axis of the threshold, it proves that the formaldehyde content is low and formaldehyde can be removed in a way with low energy consumption.

[0017] In some embodiments of this application, the formaldehyde removal module includes an adsorption module, a chemical bonding module, and a catalytic oxidation module.

[0018] In some embodiments of this application, the controller is configured to: after entering the first mode, control the formaldehyde detector to obtain the current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a first preset content value, then activate the adsorption module and / or the chemical bonding module, and activate the fresh air fan.

[0019] In the technical solution, if the vertical coordinate of the threshold point is smaller than that of the inflection point, it indicates a high formaldehyde content indoors. Therefore, a formaldehyde removal module and a fresh air fan are used simultaneously to remove formaldehyde from the room. Furthermore, in the first mode, because catalytic oxidation removes formaldehyde at a slow rate and contributes less than physical adsorption and chemical adsorption technologies, catalytic oxidation is not selected in the first mode.

[0020] In some embodiments of this application, the controller is configured to: after entering the second mode, control the formaldehyde detector to obtain the current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a second preset content value, then activate the adsorption module and / or the chemical bonding module and / or the catalytic oxidation module, and activate the fresh air fan;

[0021] The first preset content value is less than the second preset content value.

[0022] In the technical solution, compared to the first mode, the first mode has a lower preset formaldehyde content value, so the formaldehyde removal module and fresh air fan start earlier in the first mode, thus initiating formaldehyde removal earlier. However, in the second mode, the formaldehyde content is lower than in the first mode, so there is no need to start formaldehyde removal earlier.

[0023] In some embodiments of this application, the controller is configured to: after entering the third mode, control the formaldehyde detector to obtain the current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a second preset content value, then turn on the formaldehyde removal module or turn on the fresh air fan.

[0024] In the technical solution, the indoor formaldehyde content is lower in the third mode than in the first and second modes. Therefore, only one of the formaldehyde removal module or the fresh air fan needs to be turned on, which saves costs.

[0025] In some embodiments of this application, the controller is configured to exit the corresponding first mode, second mode, or third mode if the current formaldehyde content value is less than or equal to a third preset content value.

[0026] In the technical solution, under the first, second, and third modes, if the current formaldehyde content value indoors is less than the third preset content value, it means that the indoor formaldehyde concentration has reached a range that will not affect human health, and therefore the corresponding mode can be exited.

[0027] In some embodiments of this application, the controller is configured to: after entering the fourth mode, upon reaching a preset time point or after passing a first preset time period, turn on the formaldehyde removal module or turn on the fresh air fan.

[0028] In the technical solution, the formaldehyde concentration is lowest in the fourth mode. Therefore, this mode is a formaldehyde removal prevention mode. Outdoor fresh air is introduced into the room through a fresh air fan, and the air containing formaldehyde is discharged to the outside through air pressure, thereby removing the formaldehyde.

[0029] In some embodiments of this application, the controller is configured to: in the fourth mode, activating the formaldehyde removal module specifically means activating the catalytic oxidation module.

[0030] In some embodiments of this application, the controller is configured to: in the fourth mode, after turning on the formaldehyde removal module or the fresh air fan, exit the fourth mode after a second preset time period.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an air conditioner according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the overall structure of an air conditioner according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the overall structure of an air conditioner according to an embodiment of this application;

[0035] Figure 4 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0036] Figure 5 It is the lower coordinate system of the first mode of the air conditioner according to the embodiments of this application;

[0037] Figure 6 It is the lower coordinate system of the second mode of the air conditioner according to the embodiments of this application;

[0038] Figure 7 It is the lower coordinate system of the third mode of the air conditioner according to the embodiments of this application;

[0039] Figure 8 This is the lower coordinate system of the fourth mode of the air conditioner according to the embodiments of this application;

[0040] Figure 9 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0041] Figure 10 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0042] Figure 11 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0043] Figure 12 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0044] Figure 13 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0045] Figure 14This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0046] Figure 15 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0047] Figure 16 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0048] Figure 17 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0049] Figure 18 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0050] Figure 19 This is a flowchart of the operation of an air conditioner according to an embodiment of this application.

[0051] In the above diagrams: 100, casing; 200, outdoor unit. Detailed Implementation

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0057] In this application, the air conditioner performs a refrigeration cycle in its indoor unit using a compressor, condenser, expansion valve, and indoor heat exchanger. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, supplying refrigerant to conditioned and heat-exchanged air. The compressor compresses the refrigerant gas at a low temperature and low pressure, discharging it at a high temperature and high pressure. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The indoor heat exchanger evaporates the refrigerant that has expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The indoor heat exchanger achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner's indoor unit can regulate the temperature of the indoor space. The outdoor unit of an air conditioner indoor unit refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner indoor unit includes an indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit. The indoor or outdoor heat exchanger can function as either a condenser or a refrigerant. When the indoor heat exchanger functions as a condenser, the air conditioner indoor unit acts as a heater in heating mode; when it functions as a refrigerant, it acts as a cooler in cooling mode.

[0058] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0059] As attached Figures 1 to 4 As shown, in one illustrative embodiment of the air conditioner of the present invention, the air conditioner includes:

[0060] The system comprises a housing 100, a heat exchange fan, an indoor heat exchanger, a fresh air fan, a formaldehyde removal module, a formaldehyde detector, and a controller. The housing 100 has a heat exchange outlet and a fresh air outlet. The heat exchange fan, located inside the housing 100, delivers air conditioning air to the room through the heat exchange outlet. The refrigerant flowing inside the housing exchanges heat with the air, forming a heating or cooling cycle. The fresh air fan, also located inside the housing 100, delivers fresh outdoor air to the room through the fresh air outlet. The formaldehyde removal module, located inside the housing 100, removes formaldehyde. The formaldehyde detector detects indoor formaldehyde levels to obtain the current formaldehyde concentration.

[0061] Please refer to Figures 4 to 9The controller is configured to: control the formaldehyde detector to acquire the current formaldehyde content value at preset time intervals; fit multiple current formaldehyde content values ​​to form a formaldehyde release curve and configure it in a coordinate system; determine the inflection point on the formaldehyde release curve according to a preset slope; set a threshold point in the coordinate system; if the vertical coordinate of the threshold point is less than the vertical coordinate of the inflection point, enter the first mode; if the vertical coordinate of the threshold point is equal to the vertical coordinate of the inflection point, enter the second mode; if the vertical coordinate of the threshold point is greater than the vertical coordinate of the inflection point, enter the third mode. By detecting the indoor formaldehyde content value, fitting the formaldehyde release curve, and determining the formaldehyde release rate through the inflection point, different modes are entered based on the relationship between the inflection point and the threshold point. This allows for the selection of the appropriate mode for different scenarios, improving formaldehyde removal efficiency while reducing energy consumption.

[0062] In some embodiments, the controller is configured to enter a fourth mode if the maximum value of the vertical axis coordinate in the formaldehyde release curve is less than the vertical axis coordinate of the threshold point. If the maximum value of the vertical axis coordinate of the formaldehyde release curve is less than the vertical axis coordinate of the threshold, it indicates that the formaldehyde content is low and formaldehyde can be removed using a low-energy-consumption method.

[0063] In some embodiments, the formaldehyde release curve is calculated by fitting multiple current formaldehyde content values ​​together as y=f(x). The coordinate system is a Cartesian coordinate system, with the origin as the starting point of the formaldehyde release curve, the horizontal axis representing time, and the vertical axis representing formaldehyde concentration.

[0064] In some embodiments, the air conditioner further includes a timer. The controller is configured to: control the formaldehyde detector to detect and acquire the current formaldehyde content value at preset time intervals, and simultaneously control the timer to record the current time point. The current formaldehyde content values ​​recorded in different time periods are mapped to their respective time points and plotted in a coordinate system. Alternatively, each formaldehyde content value is first mapped to a time point and fitted to form a formaldehyde release curve, and then the formaldehyde release curve is plotted in a coordinate system.

[0065] The controller is configured to: when the formaldehyde detector acquires the current formaldehyde content value at preset intervals, only when the number of current formaldehyde content values ​​exceeds a preset number will the controller fit multiple current formaldehyde content values ​​to form a formaldehyde release curve and place it in a coordinate system. A more accurate formaldehyde release curve is formed when the number of current formaldehyde content values ​​exceeds the preset number, thereby improving precision and ensuring accurate entry into the corresponding mode.

[0066] In some embodiments, when fitting to form a formaldehyde release curve, a correlation coefficient R is used. 2 When R 2 When R = 1, it means that the current formaldehyde content value can form a complete formaldehyde release curve. When performing the fitting, R... 2 Fitting only begins when the value is greater than 0.98.

[0067] In some embodiments, formaldehyde release curves can predict future changes in indoor formaldehyde levels. Therefore, formaldehyde release curves do not necessarily represent the current formaldehyde level that has already been measured. By using formaldehyde release curves to predict future changes in formaldehyde levels, the air conditioner can be pre-programmed to enter the corresponding first, second, third, or fourth mode.

[0068] In some embodiments, the left end of the formaldehyde release curve is located at the origin of the coordinate system. The vertical axis of the coordinate system is the Y-axis, and the horizontal axis is the X-axis. The formaldehyde release curve extends along the right and top of the coordinate system, that is, along the positive directions of the X-axis and the Y-axis.

[0069] In some embodiments, the inflection point is located on the formaldehyde release curve. In the formaldehyde release curve, the part of the curve to the left of the inflection point, that is, the part of the curve whose vertical axis coordinate value is less than the vertical axis coordinate value of the inflection point, is the first curve. The slope of the first curve is greater than the preset slope. In this stage, the formaldehyde release rate is relatively fast, and this stage can be defined as the rapid accumulation stage.

[0070] In the formaldehyde release curve, the portion of the curve to the right of the inflection point, where the vertical axis value is greater than that of the inflection point, is the second curve. The slope of the second curve is less than the preset slope. During this stage, the formaldehyde release rate is slower, and this stage can be defined as the slow accumulation stage. The first and second curves transition smoothly.

[0071] In some embodiments, the preset slope is set by the user, or is a factory preset or delivered from the cloud.

[0072] In some embodiments, the preset slope value is between 0.5 and 1.5.

[0073] In some embodiments, the threshold point is set by the user, preset at the factory, or distributed via the cloud. The threshold point typically represents the maximum formaldehyde content that the user can accept. The threshold point can be a formaldehyde concentration value specified by national standards or a formaldehyde concentration value that will not pose a health hazard to the human body, typically 0.08.

[0074] If the ordinate of the threshold point is less than the ordinate of the inflection point, it means the threshold is on the first curve, and formaldehyde is in a rapid accumulation phase. This often occurs immediately after renovation, characterized by rapid formaldehyde release and high cumulative indoor formaldehyde concentration. Therefore, it enters the first mode, which can be understood as the most efficient formaldehyde removal mode.

[0075] If the ordinate of the threshold point equals the ordinate of the inflection point, this often occurs some time after renovation. Its characteristics include a still rapid formaldehyde release rate and a still high cumulative indoor formaldehyde concentration. Therefore, it enters the second mode, which can be understood as a highly efficient formaldehyde removal mode.

[0076] If the vertical coordinate of the threshold point is greater than that of the inflection point, it indicates that the system is on the second curve, and formaldehyde is in a slow accumulation phase. This situation often occurs after a period of formaldehyde removal treatment, characterized by a slower formaldehyde release rate, but the cumulative indoor formaldehyde concentration still exceeds the set threshold. Therefore, the system enters the third mode, which can be understood as a balanced formaldehyde removal mode.

[0077] If the maximum value of the vertical axis in the formaldehyde release curve is smaller than the vertical axis value of the threshold point, it means that even after a long period of time, the formaldehyde content will not exceed the threshold point. This situation often occurs after a long period of formaldehyde removal treatment, characterized by a very slow formaldehyde release rate and a very low cumulative indoor formaldehyde concentration. Therefore, it enters the fourth mode, which can be understood as a preventative formaldehyde removal mode.

[0078] In some embodiments, the formaldehyde removal module includes an adsorption module, a chemical bonding module, and a catalytic oxidation module.

[0079] In some embodiments, the adsorption module includes an adsorption material, which includes, but is not limited to, activated carbon, to adsorb formaldehyde from the air and reduce the formaldehyde content.

[0080] In some embodiments, the chemical bonding module includes chemical agents, such as those used in a chemical reaction with potassium permanganate. Alternatively, it may be a consumable module using catalytic oxidation technology. The specific form of this module is not the focus of this application and will not be elaborated upon here.

[0081] In some embodiments, the catalytic oxidation module includes photocatalytic degradation, thermocatalytic oxidation, etc., the specific form of which is not the focus of this application and will not be described in detail here.

[0082] In some embodiments, the highest point that the formaldehyde content can reach, determined by the formaldehyde release curve, is the maximum concentration point. In some embodiments, if the highest point that the formaldehyde content can reach cannot be determined, the highest point that the formaldehyde content can reach after a third preset time period is determined as the maximum concentration point. The point with the maximum value on the vertical axis of the formaldehyde release curve is the maximum concentration point.

[0083] Please refer to Figures 4 to 9 In some embodiments, the controller is configured to: after entering the formaldehyde removal mode, control the formaldehyde detector to acquire the current formaldehyde content value at preset time intervals, fit multiple current formaldehyde content values ​​to form a formaldehyde release curve and configure it in a coordinate system; determine the inflection point on the formaldehyde release curve according to the preset slope; and set a threshold point in the coordinate system.

[0084] Determine whether the inflection point is greater than or equal to the threshold point. If so, determine whether the inflection point is equal to the threshold point; otherwise, determine whether the maximum concentration point is higher than the threshold point.

[0085] When determining whether the inflection point is equal to the threshold point, if not, proceed to the first mode; if yes, proceed to the second mode.

[0086] When determining whether the maximum concentration point is higher than the threshold point, if yes, the system enters the third mode; otherwise, it enters the fourth mode.

[0087] Please refer to Figure 10 , Figure 11 and Figure 19 In some embodiments, the controller is configured to: upon entering the first mode, control the formaldehyde detector to acquire the current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a first preset content value, then activate the adsorption module and / or the chemical bonding module, and activate the fresh air fan. If the vertical axis coordinate of the threshold point is less than the vertical axis coordinate of the inflection point, it indicates that the indoor formaldehyde content is high; therefore, the formaldehyde removal module and the fresh air fan simultaneously remove the indoor formaldehyde. Furthermore, in the first mode, because catalytic oxidation removes formaldehyde at a slow rate and contributes less than physical adsorption and chemical adsorption technologies, catalytic oxidation is not selected in the first mode.

[0088] In some embodiments, the controller is configured to: after entering the first mode, if the current formaldehyde content value is less than the first preset content value, wait for a preset waiting time and then re-evaluate.

[0089] Please refer to Figure 12 , Figure 13 and Figure 19 In some embodiments, the controller is configured to: upon entering the second mode, control the formaldehyde detector to acquire the current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a second preset content value, then activate the adsorption module and / or the chemical bonding module and / or the catalytic oxidation module, and activate the fresh air fan; the first preset content value is less than the second preset content value. Compared to the first mode, because the first preset content value is less than the second preset content value, the formaldehyde removal module and fresh air fan are activated earlier in the first mode, thus starting the formaldehyde removal process earlier. However, in the second mode, since the formaldehyde content is less than in the first mode, it is not necessary to start formaldehyde removal earlier.

[0090] In some embodiments, the first preset content value is equal to the second preset content value multiplied by a coefficient η, where the value of the coefficient η is less than 1 and greater than 0. In some embodiments, 0.5 < coefficient η < 1.

[0091] Please refer to Figure 14 , Figure 15 and Figure 19In some embodiments, the controller is configured to: upon entering the third mode, control the formaldehyde detector to acquire the current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a second preset content value, then activate the formaldehyde removal module or the fresh air fan. In the third mode, the indoor formaldehyde content is lower than in the first and second modes, therefore only one of the formaldehyde removal module or the fresh air fan needs to be activated, saving costs.

[0092] In some embodiments, the controller is configured to: after entering the second mode, if the current formaldehyde content value is less than the second preset content value, wait for a preset waiting time and then re-evaluate.

[0093] In some embodiments, the preset waiting time is set by the user, or is preset by the factory or sent from the cloud.

[0094] In some embodiments, in the third mode, the specific operation position of the formaldehyde removal module is activated, and the adsorption module and / or chemical bonding module and / or catalytic oxidation module are activated.

[0095] In some embodiments, the controller is configured to exit the corresponding first mode, second mode, or third mode if the current formaldehyde content is less than or equal to a third preset content value. In the first, second, and third modes, if the current indoor formaldehyde content is less than the third preset content value, it indicates that the indoor formaldehyde concentration has reached a level that will not affect human health, and therefore the corresponding mode can be exited.

[0096] In some embodiments, the controller is configured to: exit the formaldehyde removal mode if the current formaldehyde content is less than or equal to a third preset content value; and maintain the current mode operation if the current formaldehyde content is greater than the third preset content value.

[0097] In some embodiments, the third preset content value is less than the first preset content value and the second preset content value. The third preset content value is less than or equal to the formaldehyde concentration value specified by national standards, ensuring that the formaldehyde concentration is reduced to a level that is not harmful to the human body before exiting the formaldehyde removal mode.

[0098] In some embodiments, the third preset content value is set by the user, or preset by the factory, or distributed by the cloud.

[0099] Please refer to Figure 16 , Figure 17 and Figure 19 In some embodiments, the controller is configured to: upon entering the fourth mode, upon reaching a preset time point or after a first preset time period, activate the formaldehyde removal module or activate the fresh air fan. In the fourth mode, the formaldehyde concentration is lowest; therefore, this mode is a preventative formaldehyde removal mode. Outdoor fresh air is introduced into the room via the fresh air fan, and the air pressure is used to expel the formaldehyde-containing air from the room to the outside, thus achieving formaldehyde removal.

[0100] In some embodiments, the controller is configured to activate the formaldehyde removal module in the fourth mode, specifically by activating the catalytic oxidation module. In the fourth mode, because the formaldehyde content is low, only the catalytic oxidation module or a fresh air fan is used. Compared to adsorption and chemical bonding modules, the catalytic oxidation module is less expensive, saving costs.

[0101] In some embodiments, the controller is configured to: in the fourth mode, after turning on the formaldehyde removal module or the fresh air fan, exit the fourth mode after a second preset time period.

[0102] In some embodiments, the preset time point, the first preset time period, and the second preset time period are set by the user, or preset by the factory, or distributed by the cloud.

[0103] In some embodiments, the air conditioner further includes an outdoor unit 200, an outdoor heat exchanger is provided inside the outdoor unit 200, and refrigerant flows between the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange.

[0104] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An air conditioner characterized by comprising: It comprises: A shell, a heat exchange air outlet and a fresh air outlet are arranged on the shell; A heat exchange fan is arranged in the shell, and the heat exchange fan is used to deliver air conditioning air to the indoor through the heat exchange air outlet; An indoor heat exchanger, the heat exchange between the refrigerant flowing in the indoor heat exchanger and the air forms a heating cycle or a refrigeration cycle; A fresh air fan is arranged in the shell, and the fresh air fan is used to deliver outdoor fresh air to the indoor through the fresh air outlet; An aldehyde removal module is arranged in the shell, and the aldehyde removal module is used to remove formaldehyde; the aldehyde removal module comprises an adsorption module, a chemical bonding module and a catalytic oxidation module; A formaldehyde detector is used to detect the formaldehyde in the indoor to obtain a current formaldehyde content value; The controller is configured to: control the formaldehyde detector to obtain a current formaldehyde content value every preset time, fit a plurality of current formaldehyde content values to form a formaldehyde release curve and configure the formaldehyde release curve in a coordinate system; determine a turning point on the formaldehyde release curve according to a preset slope; set a threshold point in the coordinate system; If the vertical axis coordinate of the threshold point is less than the vertical axis coordinate of the turning point, enter the first mode; If the vertical axis coordinate of the threshold point is equal to the vertical axis coordinate of the turning point, enter the second mode; If the vertical axis coordinate of the threshold point is greater than the vertical axis coordinate of the turning point, enter the third mode; After entering the first mode, control the formaldehyde detector to obtain a current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a first preset content value, start the adsorption module and / or the chemical bonding module, and start the fresh air fan; After entering the second mode, control the formaldehyde detector to obtain a current formaldehyde content value; if the current formaldehyde content value is greater than or equal to a second preset content value, start the adsorption module and / or the chemical bonding module and / or the catalytic oxidation module, and start the fresh air fan; The first preset content value is less than the second preset content value; After entering the third mode, control the formaldehyde detector to obtain a current formaldehyde content value; if the current formaldehyde content value is greater than or equal to the second preset content value, start the aldehyde removal module or start the fresh air fan; The turning point is located on the formaldehyde release curve, in the formaldehyde release curve, the part of the curve with a vertical axis coordinate value less than the vertical axis coordinate value of the turning point is a first curve, and the slope of the first curve is greater than the preset slope; In the formaldehyde release curve, the part of the curve with a vertical axis coordinate value greater than the vertical axis coordinate value of the turning point is a second curve, and the slope of the second curve is less than the preset slope; the first curve and the second curve smoothly transition; the threshold point represents the maximum formaldehyde content value that can be accepted by the user.

2. The air conditioner of claim 1, wherein The controller is configured to: if the maximum value of the vertical axis coordinate in the formaldehyde release curve is less than the vertical axis coordinate of the threshold point, enter the fourth mode; after entering the fourth mode, start the aldehyde removal module or start the fresh air fan at a preset time point or after a first preset time period.

3. The air conditioner of claim 2, wherein The controller is configured to: if the current formaldehyde content value is less than or equal to a third preset content value, exit the corresponding first mode, second mode or third mode.

4. The air conditioner of claim 3, wherein The controller is configured to: in the fourth mode, turn on the formaldehyde removal module, in particular, turn on the catalytic oxidation module.

5. The air conditioner of claim 3, wherein The controller is configured to: in the fourth mode, after the second pre-set time period after turning on the formaldehyde removal module or the fresh air fan, exit the fourth mode.

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