Air conditioner

Abstract

The present application relates to an air conditioner and an air-conditioner indoor unit contained therein. The air conditioner comprises: a housing; an indoor heat exchanger; a heat exchange fan; a steam generation apparatus, which comprises an electric heating member, wherein the electric heating member is configured to heat a liquid to generate steam; and a controller, which is configured to turn on the steam generation apparatus when an indoor temperature is within a first preset range, such that the electric heating member operates at a first power to generate steam so as to increase the temperature and humidity of indoor air. When the indoor temperature is lower than a lower limit value of the first preset range, the indoor heat exchanger is used as a condenser to operate for a first preset heat exchange time, the rotational speed of the heat exchange fan is increased, the steam generation apparatus is turned on, and the electric heating member operates at a second power, wherein the second power is greater than the first power; when the indoor temperature is higher than an upper limit value of the first preset range, the indoor heat exchanger stops operating; and when the concentration of indoor formaldehyde is higher than a first preset concentration, an outdoor air inlet is opened to introduce fresh air indoors, thereby improving formaldehyde release, improving a formaldehyde removal effect and achieving energy saving.

Description

air conditioner

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications filed on June 30, 2023, with application number 202310797992.4; and filed on July 28, 2023, with application number 202310946792.0, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of air-conditioning equipment, and in particular to air conditioners. Background Art

[0004] An air conditioner, or air conditioner, is a device that manually adjusts and controls the temperature, humidity, flow rate, and other parameters of the ambient air within a building or structure. Air conditioners typically consist of indoor and outdoor units, and some have formaldehyde removal capabilities.

[0005] In the related art, air conditioners with formaldehyde removal function mostly remove formaldehyde from indoor air by passing indoor air through activated carbon or formaldehyde removal filters or other adsorption materials. However, the current method of removing formaldehyde through the indoor unit of the air conditioner cannot be distinguished according to the actual usage scenarios, and the formaldehyde removal method is single, the formaldehyde removal efficiency is low, and formaldehyde still exists in the room and will continue to cause harm to the human body.

[0006] Summary of the Invention

[0007] 14. The air conditioner of claim 13, wherein the heat exchanger is configured to cool the indoor air from the heat exchanger to the outside of the housing and to allow the indoor air to flow in through the heat exchanger. Hot liquid is used to generate steam and release it to the outside of the casing; the controller is configured to: when the indoor temperature is within a first preset range, turn on the steam generating device, and the electric heating element is operated at a first power to generate steam to heat and humidify the indoor air; when the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to run for a first preset heat exchange time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element is operated at a second power to generate steam to heat and humidify the indoor air, and the second power is greater than the first power; when the indoor temperature is higher than the upper limit of the first preset range, the indoor heat exchanger stops running; when the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

[0008] An air conditioner according to some embodiments of the present application includes an air-conditioning indoor unit; the air-conditioning indoor unit includes: a casing, the casing is provided with an indoor air inlet and an outdoor air inlet; an indoor heat exchanger, the indoor heat exchanger is arranged inside the casing; a heat exchange fan, the heat exchange fan is arranged inside the casing, and the indoor air is introduced into the casing from the heat exchange inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan; a steam generating device is arranged in the casing and connected to the indoor unit The indoor air inlet and / or the outdoor air inlet are connected, the steam generating device includes an electric heating element, the electric heating element is used to heat the liquid to generate steam and release it to the outside of the casing; the human body sensing sensor is configured to: detect whether there is someone in the room; the controller is configured to: when it is detected that there is someone in the room, turn on the steam generating device, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air; after the electric heating element operates at the second power for a third preset heat exchange time, the steam generating device is stopped and the outdoor air inlet is opened to introduce fresh air into the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1A is a schematic diagram of a casing structure of a vertical air-conditioning indoor unit according to some embodiments of the present application;

[0010] FIG1B is a schematic diagram showing the position of an indoor air inlet of a vertical air conditioner indoor unit according to some embodiments of the present application and a cross-sectional view taken along line AA;

[0011] FIG1C is a side view and a cross-sectional view taken along line BB of a casing of a vertical air-conditioning indoor unit according to some embodiments of the present application;

[0012] FIG1D is a schematic diagram illustrating the installation positions of a water storage tank, a steam generating device, and an electric heating element of a vertical air conditioner indoor unit according to some embodiments of the present application, as well as a schematic diagram illustrating the relative positions of the electric heating element and the water storage tank;

[0013] FIG2 is a schematic diagram of the casing structure of a wall-mounted air conditioner indoor unit and a cross-sectional view of the casing portion according to some embodiments of the present application;

[0014] FIG3 is a first flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0015] FIG4 is a second flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0016] FIG5 is a third flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0017] FIG6 is a fourth flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0018] FIG7 is a fifth flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0019] FIG8 is a sixth flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0020] FIG9 is a seventh flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0021] FIG10 is a flowchart of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0022] FIG11 is a ninth flowchart of formaldehyde removal for a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0023] FIG12 is a flowchart 10 of formaldehyde removal of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0024] FIG13 is a flowchart 11 of the formaldehyde removal process of a vertical air-conditioning indoor unit when no one is indoors according to some embodiments of the present application;

[0025] FIG14 is a flowchart of formaldehyde removal when there is someone in the room of a vertical air conditioner indoor unit according to some embodiments of the present application;

[0026] FIG15 is a first schematic diagram of a working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0027] FIG16 is a second schematic diagram of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0028] FIG17 is a third schematic diagram of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0029] FIG18 is a fourth schematic diagram of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0030] FIG19 is a schematic diagram of the logical architecture of various scenarios of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0031] FIG20 is a schematic diagram of a logical architecture of specific contents corresponding to various scenarios of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0032] FIG21 is a fifth schematic diagram of a working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0033] FIG22 is a sixth schematic diagram of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0034] FIG23 is a seventh schematic diagram of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0035] FIG24 is a schematic diagram showing an eighth working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0036] FIG25 is a ninth diagram of a working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0037] FIG26 is a schematic diagram 10 of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0038] FIG27 is a schematic diagram 11 of a working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0039] FIG28 is a schematic diagram 12 of the working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0040] FIG29 is a thirteenth schematic diagram of a working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0041] FIG30 is a fourteenth schematic diagram of a working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0042] FIG31 is a schematic diagram of a fifteenth working process of a wall-mounted air conditioner indoor unit according to some embodiments of the present application;

[0043] Figure 32 is a sixteenth schematic diagram of the working process of the wall-mounted air-conditioning indoor unit according to some embodiments of the present application.

[0044] In the above figures: casing 1; steam generating device 2; electric heating element 3; water storage tank 4; indoor air inlet 5; outdoor air inlet 6; baffle 7; indoor heat exchanger 8; air conditioning fan 9; air guide plate 10. DETAILED DESCRIPTION

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present application.

[0046] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; connections, or indirect connections through an intermediate medium; internal communication between two elements, or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0049] The present application is described in detail below by way of exemplary embodiments, but it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0050] In this application, when the air conditioner operates in cooling mode (cooling mode means turning on the cooling function of the air conditioner to lower the indoor temperature), the air conditioner performs a refrigeration cycle of the air conditioner indoor unit by using a compressor, an outdoor heat exchanger (also called an outdoor heat exchanger), an expansion valve and an indoor heat exchanger (also called an indoor heat exchanger).

[0051] The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air. The refrigerant absorbs heat to provide cooling to the indoor space, thereby achieving temperature regulation of the indoor space.

[0052] The compressor compresses the low-temperature, low-pressure refrigerant gas and discharges it into a high-temperature, high-pressure refrigerant gas. The discharged refrigerant gas flows into the outdoor heat exchanger (condenser). The outdoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0053] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0054] The indoor heat exchanger evaporates the refrigerant 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 evaporation of the refrigerant to exchange heat with the indoor air.

[0055] Throughout the refrigeration cycle, the air conditioner indoor unit regulates the temperature of the indoor space.

[0056] When the air conditioner operates in heating mode (heating mode means turning on the heating function of the air conditioner to increase the indoor temperature), the air conditioner performs a heating cycle of the indoor unit of the air conditioner through the compressor, outdoor heat exchanger, expansion valve and indoor heat exchanger.

[0057] The heating cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air. The refrigerant releases heat to provide heat to the indoor space, thereby achieving temperature regulation of the indoor space.

[0058] The compressor compresses the low-temperature, low-pressure refrigerant gas and discharges it as high-temperature, high-pressure refrigerant gas. The discharged refrigerant gas flows into the indoor heat exchanger. The indoor heat exchanger condenses the compressed refrigerant into a liquid phase. The heat generated by the condensation is exchanged with the indoor air flowing through the indoor heat exchanger, thereby raising the indoor temperature.

[0059] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0060] The outdoor heat exchanger evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The outdoor heat exchanger can exchange heat with the outdoor air by utilizing the latent heat of evaporation of the refrigerant.

[0061] Throughout the heating cycle, the air conditioner indoor unit regulates the temperature of the indoor space.

[0062] The air conditioner outdoor unit includes at least a compressor and an outdoor heat exchanger, and is also called the outdoor unit of the air conditioner indoor unit, that is, the outdoor unit of the air conditioner indoor unit refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, and the air conditioner indoor unit includes at least an indoor heat exchanger, and is also called the indoor unit of the air conditioner indoor unit, that is, the indoor unit of the air conditioner indoor unit includes the indoor heat exchanger, and the expansion valve can be provided in the air conditioner indoor unit or the air conditioner outdoor unit.

[0063] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner indoor unit functions as a heater in heating mode, and when the indoor heat exchanger functions as an indoor heat exchanger, the air conditioner indoor unit functions as a cooler in cooling mode.

[0064] As shown in FIG1A , FIG1B , FIG1C , FIG1D and FIG2 , in some embodiments of the air conditioner of the present application, the air conditioner includes an air conditioner indoor unit;

[0065] In some embodiments, the air conditioner includes an air conditioner outdoor unit;

[0066] In some embodiments, the air conditioner outdoor unit includes a compressor;

[0067] In some embodiments, the air conditioner outdoor unit includes an outdoor heat exchanger;

[0068] In some embodiments, the air conditioner indoor unit includes an indoor heat exchanger;

[0069] In some embodiments, the expansion valve may be provided in an indoor unit or an outdoor unit of the air conditioner.

[0070] In some embodiments, the air conditioner indoor unit may be a vertical type (or cabinet type) and installed indoors, as shown in FIG. 1A to FIG. 1D .

[0071] In some embodiments, the air conditioner indoor unit may be a hanging type and installed indoors, as shown in FIG2 .

[0072] In some embodiments, the air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a pipe for circulating refrigerant, and the indoor heat exchanger and the outdoor heat exchanger are both connected to the compressor.

[0073] In some embodiments, the expansion valve is an electronic expansion valve.

[0074] In some embodiments, the electronic expansion valve is connected between the indoor heat exchanger and the outdoor heat exchanger, and is capable of expanding the liquid refrigerant that has undergone the condensation process into a low-pressure liquid refrigerant.

[0075] In some embodiments, the compressor includes an air intake and an air exhaust. The refrigerant that absorbs heat and undergoes an evaporation process enters the compressor from the air intake. The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure state and then discharges it from the exhaust.

[0076] In some embodiments, the indoor heat exchanger and the outdoor heat exchanger are respectively connected through a four-way valve and a compressor in the refrigerant circuit.

[0077] In some embodiments, the four-way valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port, wherein the air intake of the compressor is fixedly connected to the first valve port, and the air discharge port of the compressor is fixedly connected to the third valve port.

[0078] In some embodiments, in the refrigerant circuit, the refrigerant may circulate sequentially through a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger.

[0079] In some embodiments, when the air conditioner is in cooling mode, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port.

[0080] In some embodiments, when the air conditioner is in heating mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

[0081] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0082] The following describes the working process in detail by taking a vertical (cabinet) air-conditioning indoor unit as an example.

[0083] As shown in Figures 1A to 1D, in some embodiments of the air-conditioning indoor unit of the present application, the air-conditioning indoor unit includes: a casing 1, an indoor heat exchanger, a heat exchange fan, a steam generating device 2, a temperature sensor, a humidity sensor and a controller.

[0084] In some embodiments, the housing 1 is provided with an indoor air inlet and an outdoor air inlet;

[0085] In some embodiments, the indoor heat exchanger is disposed inside the housing 1;

[0086] In some embodiments, a heat exchange fan is disposed inside the housing 1. The operation of the heat exchange fan introduces airflow outside the housing 1 into the housing 1 through the heat exchange air inlet, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow. The heat exchange airflow is driven by the operation of the heat exchange fan to be output to the room.

[0087] In some embodiments, the heat exchange air inlet is provided on the casing, and the heat exchange air inlet is communicated with the indoor space.

[0088] In some embodiments, the steam generating device 2 is disposed in the housing 1 and is connected to the indoor air inlet and / or the outdoor air inlet.

[0089] In some embodiments, the steam generating device 2 includes a water storage tank 4 and an electric heating element 3;

[0090] In some embodiments, the electric heating element is disposed below the water tank 4 , in which liquid is stored. The liquid flows through the electric heating element 3 , which is configured to heat the liquid to generate high-temperature steam and release it to the outside of the casing 1 .

[0091] In some embodiments, a temperature sensor is disposed at an indoor air inlet or a heat exchange inlet to facilitate detection of the indoor temperature.

[0092] In some embodiments, a humidity sensor is disposed at an indoor air inlet or a heat exchange inlet to facilitate detection of indoor humidity.

[0093] In some embodiments, the controller controls the electric heating element in the steam generating device 2 to start operation. Since the steam generating device 2 is connected to the indoor air inlet and / or the outdoor air inlet, the indoor air can be introduced into the steam generating device 2 through the indoor air inlet, or the outdoor air can be introduced into the steam generating device 2 through the outdoor air inlet, or the indoor air and the outdoor air can be introduced into the steam generating device 2 together, so that the electric heating element 3 in the steam generating device 2 heats the liquid to generate high-temperature steam, and then contacts the introduced airflow. On the one hand, the metabolic activity of the bacteria and virus cells in the airflow disappears due to the high temperature, and the cells die; on the other hand, when the dust, hair, and dust mites in the air come into contact with the high-humidity air, the water vapor in the air will settle on them, further filtering the air so that the purified airflow is released outside the casing 1, thereby achieving an air purification effect.

[0094] In some embodiments, a first fan is also provided in the casing, and the first fan is configured to: drive the air introduced by the indoor air inlet and / or the outdoor air inlet to the indoor space outside the casing, so that the high-temperature and high-humidity gas generated by the steam generating device can be driven by the first fan to flow into the indoor space outside the casing.

[0095] 3-9 , in some embodiments, the controller is configured to: when the indoor temperature is within a first preset range, turn on the steam generating device, and operate the electric heating element at a first power to generate steam to heat and humidify the indoor air.

[0096] In some embodiments, the controller is configured as follows: when the indoor temperature is lower than the lower limit of a first preset range, the indoor heat exchanger is used as a condenser to run for a first preset heat exchange time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element is operated at a second power to generate steam to heat and humidify the indoor air, and the second power is greater than the first power.

[0097] In some embodiments, when the indoor temperature is higher than an upper limit of the first preset range, the indoor heat exchanger stops operating.

[0098] In some embodiments, when the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

[0099] Through the above scheme, after the air-conditioning indoor unit turns on the formaldehyde removal mode (turning on the formaldehyde removal mode means that the air conditioner starts the formaldehyde removal function, so that the formaldehyde in the furniture and home decoration in the space where the air-conditioning indoor unit is located is released into the air, and the indoor air containing formaldehyde is discharged to the outdoors), the formaldehyde removal logic can be selectively executed at different indoor temperatures, thereby ensuring that the formaldehyde removal effect is optimal and energy-saving.

[0100] In some embodiments, the air conditioner indoor unit further includes a human body sensing sensor and / or a formaldehyde concentration sensor. The human body sensing sensor is configured to detect whether there is someone in the room, and the formaldehyde concentration sensor is configured to detect the indoor formaldehyde concentration.

[0101] In some embodiments, when the controller of the air conditioner indoor unit receives a formaldehyde removal command, the infrared human sensor is turned on to detect whether there is anyone in the room.

[0102] 3-13 , in some embodiments, when the human sensor detects that there is no one in the room ( S301 ), the indoor heat exchanger stops running and the heat exchange fan starts running at a first speed ( S302 ) so as to disturb the indoor air, increase the air flow rate between the indoor air and the furniture surface, and thereby promote the release of formaldehyde in the furniture and home furnishings into the indoor air.

[0103] In some embodiments, after the heat exchange fan is started and operated for a first time, the indoor formaldehyde concentration is detected (S303). When the indoor formaldehyde concentration is detected to be no higher than the set amplitude of the initial indoor formaldehyde concentration (S306), the heat exchange fan continues to operate at the first speed (S307).

[0104] In some embodiments, when it is detected that the indoor formaldehyde concentration is higher than the set amplitude of the initial indoor formaldehyde concentration ( S304 ), the speed of the heat exchange fan is increased ( S305 ), thereby quickly disturbing the indoor air.

[0105] In some embodiments, after the controller of the air conditioner indoor unit receives the formaldehyde removal command, the formaldehyde concentration sensor detects the initial indoor formaldehyde concentration at that time.

[0106] In some embodiments, the set amplitude of the initial indoor formaldehyde concentration can be set as a multiple of the initial indoor formaldehyde concentration.

[0107] In some embodiments, the set amplitude of the initial indoor formaldehyde concentration can be set to twice the initial indoor formaldehyde concentration. That is, when the detected indoor formaldehyde concentration is higher than twice the initial indoor formaldehyde concentration, it indicates that the furniture and furnishings are releasing a large amount of formaldehyde into the indoor air. Increasing the speed of the heat exchange fan at this time can quickly disturb the indoor air. Specifically, the speed of the heat exchange fan is increased from a first speed to a second speed, which is higher than the first speed, to improve the flow of indoor air and promote the release of formaldehyde.

[0108] In some embodiments, the controller is further configured to: detect the indoor temperature and indoor humidity after the heat exchange fan is increased from the first speed to the second speed (S401).

[0109] In some embodiments, the controller is further configured to: when the indoor temperature is within a first preset range (S402), turn on the steam generating device and operate the electric heating element at a first power (S403) to generate steam to heat and humidify the indoor air.

[0110] In some embodiments, it can be set that when the difference between the upper limit of the first preset range and the real-time indoor temperature is between 3° C. and 10° C., the real-time indoor temperature at this time is within the first preset range.

[0111] In some embodiments, when the indoor temperature is lower than a lower limit of a first preset range (S501), the controller is configured to perform some or all of the following operations:

[0112] Operation 1: the indoor heat exchanger is used as a condenser to operate for a first preset heat exchange time, and the speed of the heat exchange fan is increased (S502);

[0113] Operation 2: Turn on the steam generating device, and operate the electric heating element at a second power to generate steam to heat and humidify the indoor air (S503).

[0114] The second power is greater than the first power.

[0115] In some embodiments, the second power can be set to the rated power of the electric heating element, and the first power can be set to any value in the range of 50%-80% of the rated power, such as 50%, 60%, 65%, 80%, etc.

[0116] In some embodiments, when the indoor temperature is higher than the upper limit of the first preset range (S601), formaldehyde in indoor furniture and furnishings can be quickly released into the indoor air, and the indoor heat exchanger stops running (S602).

[0117] In some embodiments, the upper limit value of the first preset range can be set by the user, or can be preset by the air conditioner at the factory, or sent from the cloud.

[0118] In some embodiments, the first preset range includes a first range and a second range, and a lower limit value of the first range is higher than an upper limit value of the second range.

[0119] In some embodiments, when the indoor temperature is within a first range, indicating that the indoor temperature is relatively close to the upper limit of the first preset range, the steam generator is activated, the electric heating element of the steam generator operates at a lower first power, the speed of the first fan is increased, and the high-temperature, high-humidity steam generated by the steam generator is higher in temperature and greater in steam production. The high-temperature, high-humidity steam is driven by the first fan and discharged into the indoor space outside the housing. As the high-temperature steam heats and humidifies the indoor air, it can rapidly release formaldehyde from the furniture, thereby increasing the release rate of formaldehyde from the furniture.

[0120] In this embodiment, it can be set that when the difference between the upper limit of the first preset range and the real-time indoor temperature is between 3° C. and 5° C., the real-time indoor temperature at this time is within the first range.

[0121] In some embodiments, when it is detected that the indoor formaldehyde concentration is higher than a first preset concentration ( S701 ), the outdoor air inlet is opened to introduce fresh air into the room ( S702 ).

[0122] In this embodiment, the first preset concentration is the concentration when the release of formaldehyde reaches an equilibrium state.

[0123] In some embodiments, it can be set that when the indoor formaldehyde concentration is higher than a first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range, and the preset fluctuation range can be set to ±0.001mg / m 3 Alternatively, it can be set that the fluctuation range Y between the maximum and minimum values ​​of the formaldehyde concentration within the set time does not exceed 10%, Y = (maximum value - minimum value) / maximum value * 100%.

[0124] In some embodiments, the indoor air inlet and the outdoor air inlet are arranged adjacent to each other, and a baffle 7 is further provided on the casing, and the baffle 7 is rotatably connected to the casing.

[0125] In some embodiments, the damper can be rotated to cooperate with the indoor air inlet to close the indoor air inlet, or rotated to cooperate with the outdoor air inlet to close the outdoor air inlet.

[0126] In some embodiments, the damper may also partially close the indoor air inlet or partially close the outdoor air inlet.

[0127] In some embodiments, when the indoor formaldehyde concentration is detected to be higher than a first preset concentration, indicating a high indoor formaldehyde concentration, the damper rotates to engage with the indoor air inlet to close the indoor air inlet, leaving the outdoor air inlet open. The outdoor air inlet is then opened to introduce fresh air into the room. The fresh air enters the housing through the outdoor air inlet, passes through the steam generator, and is discharged into the indoor space outside the housing. The fresh air dilutes the higher indoor formaldehyde concentration, allowing the indoor formaldehyde to be discharged outdoors through gaps such as door cracks.

[0128] In some embodiments, when the indoor temperature is within the second range (S1001), the controller is configured to perform some or all of the following operations:

[0129] Operation 1: The indoor heat exchanger is used as a condenser to operate for a second preset heat exchange time. In some embodiments, the second preset heat exchange time can be set to any value in the range of 20-40 minutes, such as 20 minutes, 24 minutes, 26 minutes, 30 minutes, 40 minutes, etc.

[0130] Operation 2: Increase the speed of the heat exchange fan;

[0131] Operation three: turning on the steam generating device, and operating the electric heating element at a first power to generate steam to heat and humidify the indoor air;

[0132] In operation four, the speed of the first fan increases, and the steam generator generates high-temperature, high-humidity steam at a higher temperature and in greater quantities. This high-temperature, high-humidity steam is driven by the first fan and discharged into the indoor space outside the housing. As the high-temperature steam heats and humidifies the indoor air, it rapidly releases formaldehyde from the furniture, thereby increasing the release rate of formaldehyde from furniture and home furnishings.

[0133] In this embodiment, it can be set that when the difference between the upper limit of the first preset range and the real-time indoor temperature is between 5° C. and 10° C., the real-time indoor temperature is within the second range.

[0134] Referring to Figure 10, in some embodiments, the controller is configured to: when the indoor formaldehyde concentration is higher than the set amplitude of the initial indoor formaldehyde concentration (S304), increase the speed of the heat exchange fan (S305), detect the indoor temperature and indoor humidity (S401), and when the indoor temperature is within the second range (S1001), the indoor heat exchanger is used as a condenser to run for a second preset heat exchange time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element is operated at a first power (S1002) to increase the release rate of formaldehyde in furniture and home decoration.

[0135] In some embodiments, when the indoor temperature is lower than the lower limit of the first preset range (S501), the indoor heat exchanger is used as a condenser to operate for the first preset heat exchange time, the speed of the heat exchange fan is increased (S502), the steam generating device is turned on, and the electric heating element is operated at a second power to generate steam to heat and humidify the indoor air (S503).

[0136] In some embodiments, the first preset heat exchange time is longer than the second preset heat exchange time.

[0137] In some embodiments, the first preset heat exchange time can be set to any value in the range of 30-60 minutes, such as 30 minutes, 5 minutes, 50 minutes, 55 minutes, 60 minutes, etc.

[0138] In some embodiments, the second power can be set to the rated power. Accordingly, the speed of the first fan increases, and the high-temperature, high-humidity steam generated by the steam generator is higher in temperature and greater in steam production. This high-temperature, high-humidity steam is driven by the first fan and discharged into the indoor space outside the housing. When the high-temperature steam heats and humidifies the indoor air, it rapidly releases formaldehyde from the furniture, thereby increasing the release rate of formaldehyde from the furniture.

[0139] In some embodiments, it can be set that when the difference between the upper limit value of the first preset range and the real-time indoor temperature is greater than 10° C., the real-time indoor temperature at this time is lower than the lower limit value of the first preset range.

[0140] In some embodiments, when the indoor formaldehyde concentration is detected to be higher than a first predetermined concentration, the outdoor air inlet is opened to introduce fresh air into the room. The fresh air enters the housing through the outdoor air inlet, passes through the steam generator, and is discharged into the indoor space outside the housing. The fresh air dilutes the higher concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged outdoors through gaps such as door cracks.

[0141] In some embodiments, when the indoor temperature is higher than an upper limit of a first preset range ( S601 ), the indoor heat exchanger stops operating ( S602 ), and it is detected whether the indoor humidity is higher than a first preset humidity ( S1101 ).

[0142] In some embodiments, when the indoor humidity is higher than the first preset humidity, it means that the indoor temperature and indoor humidity at this time can promote the release of formaldehyde in furniture and home furnishings into the indoor air. At this time, there is no need to heat and humidify the indoor air. The steam generating device can be stopped (S1102), that is, the electric heating element stops running, thereby saving energy consumption.

[0143] In some embodiments, when the indoor temperature is higher than the upper limit of a first preset range and the indoor humidity is higher than a first preset humidity, the indoor formaldehyde concentration is detected (S1201). When the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room (S1202). At this time, the baffle rotates to close the indoor air inlet, opening the outdoor air inlet. Fresh air enters the housing through the outdoor air inlet, passes through the steam generator, and is discharged into the indoor space outside the housing. The fresh air dilutes the higher concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through gaps such as door cracks.

[0144] In some embodiments, when the indoor temperature is above the upper limit of a first preset range (S601) and the indoor humidity is detected to be no higher than the first preset humidity, the steam generator is activated, and the electric heating element operates at a first power to generate steam to heat and humidify the indoor air (S1301). The speed of the first fan is increased, and the high-temperature, high-humidity steam generated by the steam generator is higher in temperature and greater in steam production. The high-temperature, high-humidity steam is driven by the first fan and discharged into the indoor space outside the housing. As the high-temperature steam heats and humidifies the indoor air, it rapidly releases formaldehyde from the furniture, thereby increasing the release rate of formaldehyde from the furniture.

[0145] In some embodiments, when it is detected that the indoor formaldehyde concentration is higher than a first predetermined concentration, the outdoor air inlet is opened to introduce fresh air into the room (S1202). The fresh air enters the housing through the outdoor air inlet, passes through the steam generating device, and is discharged into the indoor space outside the housing. The fresh air dilutes the higher concentration of formaldehyde in the room, and the indoor formaldehyde can be discharged to the outside through a gap such as a door.

[0146] In some embodiments, when the indoor formaldehyde concentration is lower than a second preset concentration, the baffle rotates to close the outdoor air inlet and open the indoor air inlet (S1302).

[0147] In some embodiments, the second preset concentration can be set to a safe concentration of formaldehyde, which can be a national safety standard value for formaldehyde. When the indoor formaldehyde concentration is lower than the second preset concentration, the indoor formaldehyde concentration is within the safe concentration range for the human body. Therefore, the fresh air can be turned off and the indoor air inlet can be opened for the next formaldehyde removal cycle.

[0148] 14 , in some embodiments, when the human body sensing sensor detects that there is someone in the room ( S1401 ), the user turns on the formaldehyde removal function to perform a formaldehyde removal cycle, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air ( S1402 ).

[0149] In this embodiment, after the electric heating element operates at the second power for a third preset heat exchange time, the steam generating device is stopped (S1403), and the outdoor air inlet is opened to introduce fresh air into the room (S1404). This ensures that when people are indoors, fresh air is introduced in a timely manner to dilute the indoor formaldehyde concentration, thereby preventing people from being harmed by an environment with a high indoor formaldehyde concentration. The third preset heat exchange time is greater than the first preset heat exchange time.

[0150] In some embodiments, the third preset heat exchange time can be set to any value in the range of 70-100 minutes, such as 70 minutes, 80 minutes, 90 minutes, 95 minutes, 100 minutes, etc.

[0151] When a person is detected in the room, the outdoor air inlet is opened for a fourth preset heat exchange time (S1405), the outdoor air inlet is closed, the indoor air inlet is opened, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air (S1406). The fourth preset heat exchange time can be the same as the third preset heat exchange time.

[0152] In this way, fresh air is introduced into the room for a long time to dilute the indoor formaldehyde concentration. After the fourth preset heat exchange time, the indoor formaldehyde concentration is already low. At this time, the outdoor air inlet is closed and the indoor air inlet is opened. The electric heating element heats the humidification liquid to generate steam, creating a high temperature and high humidity environment in the room, which promotes the release of formaldehyde in the furniture and achieves a cyclic formaldehyde removal effect.

[0153] Taking a wall-mounted air-conditioning indoor unit as an example, its working process is described in detail.

[0154] As shown in Figures 2 and 15, in some embodiments of the air conditioner of the present application, the air conditioner includes a wall-mounted air conditioner indoor unit including: a casing 1, a heat exchange fan, an indoor heat exchanger 8, a humidifier, a fresh air fan, an air guide plate 10 and a controller.

[0155] In some embodiments, the housing 1 is provided with a heat exchange outlet and a fresh air outlet;

[0156] In some embodiments, the heat exchange fan further has a plurality of heat exchange speed gears with successively increasing speeds; the heat exchange fan is configured to: deliver conditioned air to the room through the heat exchange air outlet; perform heat exchange between the refrigerant flowing inside the heat exchange fan and the air to form a heating cycle or a cooling cycle;

[0157] In some embodiments, a humidifier is disposed in the housing 1 , and the humidifier is configured to: increase the indoor humidity to accelerate the volatilization of formaldehyde;

[0158] In some embodiments, the fresh air blower is disposed in the housing 1 , and the fresh air blower is configured to: deliver outdoor fresh air to the room through the fresh air outlet;

[0159] In some embodiments, the air guide plate 10 is provided at the heat exchange outlet, and the air guide plate 10 is flipped to adjust the direction of the air conditioning air passing through the heat exchange outlet;

[0160] In some embodiments, the controller is preset with multiple first-level scenarios, and each first-level scenario corresponds to multiple second-level scenarios;

[0161] In some embodiments, the controller is configured to: based on the current conditions and entering the corresponding first-level scenario, determine whether there is a second-level scenario corresponding to the current conditions under the current first-level scenario;

[0162] In some embodiments, the controller is configured to: if not, enter the formaldehyde removal mode corresponding to the first-level scenario;

[0163] In some embodiments, the controller is configured to: if yes, enter the corresponding secondary scene, determine whether there is a third scene corresponding to the current conditions under the current secondary scene, if not, enter the formaldehyde removal mode corresponding to the corresponding secondary scene; if yes, enter the corresponding third scene;

[0164] In some embodiments, the controller is configured to: determine whether there is a fourth-level scenario corresponding to the current conditions under the current third-level scenario; if not, enter the formaldehyde removal mode corresponding to the corresponding third-level scenario; if yes, enter the corresponding fourth-level scenario, and enter the formaldehyde removal mode corresponding to the fourth-level scenario.

[0165] In the related art, when removing formaldehyde, air conditioners have a single mode and cannot perform different formaldehyde removal operations according to different scenarios, resulting in poor results and high energy consumption. However, based on the above content, the present application can select corresponding modes according to different scenarios to achieve formaldehyde removal, achieving high efficiency while reducing energy consumption and realizing intelligent formaldehyde removal.

[0166] 15 to 18 , in some embodiments, the first-level scenario includes three sub-scenarios, which are respectively recorded as a first-level scenario, a second-level scenario, and a third-level scenario.

[0167] In some embodiments, depending on whether the user has checked into the house and the check-in time, before check-in can be defined as the first-level scenario; within one year of check-in is defined as the second-level scenario; and one to three years of check-in is defined as the third-level scenario.

[0168] In related technologies, formaldehyde levels are typically high after renovations, but gradually decrease over time. Therefore, based on demand, the primary scenarios are divided into before move-in, within one year after move-in, and within one to three years of move-in. Different formaldehyde removal methods can be selected based on the primary scenarios to reduce energy consumption.

[0169] In some embodiments, the first level scenario corresponds to the first level scenario and the second level scenario; wherein spring, autumn and winter are defined as the first level scenario; summer is defined as the second level scenario;

[0170] In some embodiments, the second-level scenario corresponds to the third-level scenario, the fourth-level scenario, and the fifth-level scenario; wherein spring and autumn are defined as the third-level scenario; summer is defined as the fourth-level scenario; and winter is defined as the fifth-level scenario.

[0171] In some embodiments, the third level one scenario corresponds to the sixth level two scenario, the seventh level two scenario, and the eighth level two scenario; among them, spring and autumn are defined as the sixth level two scenario; summer is defined as the seventh level two scenario; and winter is defined as the eighth level two scenario.

[0172] Since the temperature is different in different seasons, the formaldehyde precipitation content is different. Different secondary scenarios are distinguished according to different seasons, so that the most suitable formaldehyde removal mode can be selected in accordance with different seasons in turn, thereby improving the efficiency of formaldehyde removal.

[0173] 15 to 20 , in some embodiments, the fifth level-two scenario corresponds to the first level-three scenario and the second level-three scenario; wherein the south is defined as the first level-three scenario, and the north is defined as the second level-three scenario;

[0174] In some embodiments, the eighth level-two scenario corresponds to a third level-three scenario and a fourth level-three scenario; wherein the south is the third level-three scenario and the north is the fourth level-three scenario.

[0175] According to the geographical area where the air conditioner is used, although it is winter, the temperature in the south and the north is quite different. The temperature in the south may be above zero, while the temperature in the north is mostly below zero. Therefore, there are three levels of scenarios corresponding to the south and the north respectively, so that corresponding formaldehyde removal effects can be implemented in different regions.

[0176] In some embodiments, the first and third level scenarios correspond to the first and second level scenarios; wherein the outdoor temperature being lower than the set temperature is defined as the first and second level scenarios; and the outdoor temperature being higher than the set temperature is defined as the second and second level scenarios;

[0177] In some embodiments, the third-level scenario corresponds to a third-level scenario and a fourth-level scenario; wherein the outdoor temperature is lower than the set temperature and is defined as the third-level scenario; the outdoor temperature is higher than the set temperature and is defined as the fourth-level scenario.

[0178] The above solution addresses the large temperature differences in southern China during winter, sometimes exceeding ten degrees. Furthermore, even within the same southern region, the temperature differences between different cities are also significant. Therefore, a set temperature is set, and three levels of scenarios are divided based on the outdoor temperature and the set temperature, enabling the corresponding formaldehyde removal mode to better suit the specific conditions, further improving formaldehyde removal effectiveness and reducing energy consumption.

[0179] In some embodiments, the setting scheme is set by the user, or preset in the cloud, or preset in the air conditioner factory.

[0180] In some embodiments, the set temperature is any value in the range of 8-13°C, such as 8°C, 9°C, 10°C, 12°C, etc.

[0181] After an overall overview of the workflow of the air conditioner in this embodiment, a part of the workflow of the air conditioner of this application is described in detail below using a specific embodiment as an example.

[0182] In some feasible embodiments, referring to FIG. 15 , the controller may be specifically configured to: enter the formaldehyde removal mode (S1501), determine whether the current scenario is before check-in (S1502), if so, enter the first level scenario (S1503); if not, determine whether the current scenario is within one year of check-in (S1504), if so, enter the second level scenario (S1505), if not, determine whether the current scenario is between one and three years of check-in (S1506), if so, enter the third level scenario (S1507); if not, end.

[0183] In some feasible embodiments, following the process shown in Figure 15, referring to Figure 16, after determining to enter the first level scenario (S1503), the controller can be specifically configured to: determine whether the current scenario is in spring, autumn or winter (S1601), if so, enter the first level scenario (S1602); if not, further determine whether the current scenario is in summer (S1603), if so, enter the second level scenario (S1604), if not, end.

[0184] In some feasible embodiments, following the process shown in Figure 15, referring to Figure 17, after determining to enter the second level scenario (S1505), the controller is specifically configured to: determine whether the current scenario is in spring or autumn (S1701), if so, enter the third level scenario (S1702); if not, further determine whether the current scenario is in summer (S1703), if so, enter the fourth level scenario (S1704), if not, determine whether the current scenario is in winter (S1705), if so, enter the fifth level scenario (S1706), if not, end. After entering the fifth and second level scenarios, further determine whether it is in the south (S1707). If so, enter the first and third level scenarios (S1708); if not, enter the second and third level scenarios (S1709); after entering the first and third level scenarios, determine whether the outdoor temperature is higher than the set temperature (S1710). If so, enter the second and fourth level scenarios (S1711); if not, enter the first and fourth level scenarios (S1712).

[0185] In some feasible embodiments, following the process shown in Figure 15, referring to Figure 18, after determining to enter the third level scenario (S1507), the controller is specifically configured to: determine whether the current scenario is in spring or autumn (S1801), if so, enter the sixth level scenario (S1802); if not, further determine whether the current scenario is in summer (S1803), if so, enter the seventh level scenario (S1804), if not, determine whether the current scenario is in winter (S1805), if so, enter the eighth level scenario (S1806), if not, end. After entering the eighth level 2 scenario, further determine whether it is in the south (S1807). If so, enter the fourth level 3 scenario (S1808); if not, enter the third level 3 scenario (S1809); after entering the fourth level 4 scenario, determine whether the outdoor temperature is higher than the set temperature (S1810). If so, enter the fourth level 4 scenario (S1811); if not, enter the third level 4 scenario (S1812).

[0186] 19 and 20, in some embodiments, the controller is configured as follows: the first and second level scenarios (S1602) enter the first mode (S2101); the second and second level scenarios (S1604) enter the second mode (S2201); the third and second level scenarios (S1702) enter the third mode (S2301); the fourth and second level scenarios (S1704) enter the fourth mode (S2401); the first and fourth level scenarios (S1712) enter the fifth mode (S2501); the second and fourth level scenarios (S1711) enter the The second level scenario (S1709) enters the seventh mode (S2701); the sixth level scenario (S1802) enters the eighth mode (S2801); the seventh level scenario (S1804) enters the ninth mode (S2901); the third level scenario (S1812) enters the tenth mode (S3001); the fourth level scenario (S1811) enters the eleventh mode (S3101); the fourth level scenario (S1808) enters the twelfth mode (S3201).

[0187] In this embodiment, the first mode represents the activation of the first formaldehyde removal function of the air conditioner, and the second mode, third mode, fourth mode, fifth mode, sixth mode, seventh mode, eighth mode, and subsequent ninth mode, tenth mode, eleventh mode, twelfth mode, etc. are similar to the first mode, representing the activation of the corresponding formaldehyde removal function of the air conditioner.

[0188] In some embodiments, the controller is configured to: in the first mode, the fifth mode and the tenth mode, perform some or all of the following operations: operation one, control the indoor heat exchanger to be used as a condenser; operation two, control the reciprocating movement of the air guide plate; operation three, turn on the humidifier and maintain it for a corresponding preset time, then turn on the fresh air fan and circulate.

[0189] In this embodiment, the indoor heat exchanger is used as a condenser to achieve indoor temperature increase. According to the characteristic that formaldehyde precipitates faster at higher temperatures, the formaldehyde precipitation effect can be improved.

[0190] In this embodiment, the air flow in the room is accelerated by sweeping air through the air guide plate, thereby further accelerating the precipitation effect of formaldehyde.

[0191] In this embodiment, the indoor humidity is increased by using a humidifier, and the precipitation rate of formaldehyde is accelerated under high humidity conditions, further improving the precipitation effect of formaldehyde.

[0192] In this embodiment, the outdoor air is blown into the room by the fresh air blower, so that the indoor air containing formaldehyde is discharged.

[0193] In some embodiments, the controller is configured to: in the second mode, the third mode, the sixth mode, the seventh mode, the eighth mode, the eleventh mode and the twelfth mode; turn on the fresh air blower and wait for the corresponding preset time before circulating.

[0194] In some embodiments, the controller is configured to: in the fourth mode and the ninth mode, perform some or all of the following operations: operation one, control the indoor heat exchanger to be used as an evaporator; operation two, turn on the humidifier and maintain it for a corresponding preset time, then turn on the fresh air fan and circulate.

[0195] In some embodiments, the number of cycles, preset time, and number of cycles are different in different modes.

[0196] In some embodiments, when the indoor heat exchanger functions as a condenser, the air conditioner is in heating mode.

[0197] In some embodiments, when the indoor heat exchanger is used as an evaporator, the air conditioner is in cooling mode.

[0198] In some embodiments, the air conditioning indoor unit further includes an air conditioning fan 9;

[0199] In some embodiments, the air conditioning fan and the heat exchange fan may be the same fan, or they may be independent fans.

[0200] In some embodiments, the air conditioning fan has a first air conditioning speed, a second air conditioning speed, a third air conditioning speed and a fourth air conditioning speed with wind speeds decreasing in sequence.

[0201] In some embodiments, a driving member is provided in the housing 1, and the driving member drives the air guide plate 10 to move to achieve air sweeping.

[0202] Referring to FIG. 21 , in some embodiments, the controller is configured to: after entering the first mode ( S2101 ), enter the first stage, and in the first stage, perform some or all of the following operations:

[0203] Operation 1: Control the indoor heat exchanger 8 to be used as a condenser to make the indoor temperature reach a first preset temperature value;

[0204] Operation 2: Control the air-conditioning fan 9 to run at a second air-conditioning speed, and control the driving member to flip the guide plate to achieve air sweeping;

[0205] Operation three, turning on the humidifier to make the indoor humidity reach a first preset humidity;

[0206] Operation 4: After the running time reaches the first preset time, the air conditioner fan 9 and the humidifier are turned off;

[0207] Operation 5: Turn on the fresh air fan;

[0208] Operation 6: After the second preset time, repeat the above process until the first number of cycles are completed, thus completing the first stage.

[0209] In some embodiments, X=C / V hours, where C is the fresh air volume and V is the building volume.

[0210] M = 168 / (1.5+X).

[0211] In some embodiments, in the first stage, the first preset temperature value is any value in the range of 28-35°C, such as 28°C, 29°C, 32°C, 33°C, 35°C, etc.

[0212] In some embodiments, the first preset humidity is any value in the range of 60-88%, such as 60%, 65%, 68%, 70%, 80%, 88%, etc.

[0213] In some embodiments, the first preset time is any value in the range of 1-2.5 hours, such as 1 hour, 1.2 hours, 1.5 hours, 1.8 hours, 2.3 hours, 2.5 hours, etc.

[0214] In some embodiments, in the first stage, the second preset time is X hours, and the first cycle number is M.

[0215] Still referring to FIG. 21 , in some embodiments, the controller is configured to: in the first mode, after completing the first stage, enter the second stage; in the second stage, perform some or all of the following operations:

[0216] Operation 1: Control the indoor heat exchanger 8 to be used as a condenser to make the indoor temperature reach a first preset value;

[0217] Operation 2: Control the air-conditioning fan 9 to operate at a third air-conditioning speed, and control the driving member to flip the guide plate to achieve air sweeping;

[0218] Operation three, turning on the humidifier to make the indoor temperature reach the first preset humidity;

[0219] Operation 4: After the third preset time is reached, the air conditioner fan 9 and the humidifier are turned off;

[0220] Operation 5: Turn on the fresh air fan;

[0221] Operation 6: After continuing to run for a fourth preset time, repeat the above process until the second number of cycles are completed, thus completing the second stage.

[0222] In some embodiments, in the second stage, specific values ​​of the first preset temperature value and the first preset humidity value are detailed in the above content and will not be repeated here.

[0223] In some embodiments, the third preset time is any value in the range of 2-4 hours, such as 2.5 hours, 3 hours, 3.2 hours, 4 hours, etc.

[0224] In some embodiments, in the second stage, the fourth preset time is X hours, and the second number of cycles is N, where N can be determined using any method for determining the number of cycles, and this application does not specifically limit this. In some embodiments, N can be calculated using the aforementioned formula, i.e., the same as M.

[0225] In some embodiments, the controller is configured to: in the first mode, after completing the second stage, enter the third stage, and in the third stage, perform some or all of the following operations:

[0226] Operation 1: Control the indoor heat exchanger 8 to be used as a condenser to make the indoor temperature reach a first preset value;

[0227] Operation 2: Control the air-conditioning fan 9 to operate at a fourth air-conditioning speed, and control the driving member to flip the guide plate to achieve air sweeping;

[0228] Operation three, turning on the humidifier to make the indoor temperature reach the first preset humidity;

[0229] Operation 4: After the fifth preset time is reached, the air conditioner fan 9 and / or the humidifier are turned off;

[0230] Operation 5: Turn on the fresh air fan;

[0231] Operation six: After the sixth preset time is continued, the above process is repeated until the third number of cycles are completed, thus completing the third stage.

[0232] In some embodiments, in the third stage, the fifth preset time is any value in the range of 4-7 hours, such as 4 hours, 4.5 hours, 5 hours, 6 hours, 7 hours, etc.

[0233] In some embodiments, during the third stage, the sixth preset time is X hours, and the third number of cycles is Q. Q can be determined using any method for determining the number of cycles, and this application does not specifically limit this. In some embodiments, Q can also be calculated using the aforementioned formula, i.e., the same as M.

[0234] In some embodiments, in the first mode, when the fresh air blower is turned on in the first stage, the second stage, and the third stage, the fresh air blower operates at the maximum speed.

[0235] In some embodiments, the controller is configured to: in the first mode, exit the first mode after completing the third stage.

[0236] In some embodiments, the controller is configured to: in the first mode, after completing the third stage, determine whether the user exits the formaldehyde removal mode (S2105); if so, end, i.e. exit the first mode and / or exit the formaldehyde removal mode; if not, recycle the first mode (S2101).

[0237] As a specific embodiment, in the workflow shown in Figure 21, in the first mode, the controller is configured to: enter the first stage, in the first stage, control the indoor heat exchanger to be used as a condenser to make the indoor temperature reach the first preset temperature value, control the air-conditioning fan to run at the second air-conditioning speed, control the driving member to flip the guide plate to achieve wind sweeping, turn on the humidifier to make the indoor humidity reach the first preset humidity, turn off the air-conditioning fan 9 and the humidifier after the running time reaches the first preset time, turn on the fresh air fan, and continue for the second preset time, repeat the above process until the first number of cycles are completed, and the first stage (S2102) is completed; enter the second stage, in the second stage, control the indoor heat exchanger to be used as a condenser to make the indoor temperature reach the first preset temperature value, control the air-conditioning fan to run at the third air-conditioning speed, control the driving member to flip the guide plate to achieve wind sweeping, turn on the humidifier to make the indoor humidity reach the first preset humidity, turn off the air-conditioning fan 9 and the humidifier after the running time reaches the first preset time, turn on the fresh air fan, and continue for the second preset time, repeat the above process until the first cycle is completed, and the first stage (S2102) is completed; enter the second stage, in the second stage, control the indoor heat exchanger to be used as a condenser to make the indoor temperature reach the first preset temperature value, control the air-conditioning fan to run at the third air-conditioning speed, control the driving member to flip Turn the guide plate to achieve wind sweeping, turn on the humidifier to make the indoor temperature reach the first preset humidity, after running for the third preset time, turn off the air conditioning fan and humidifier, turn on the fresh air fan, and continue to run for the fourth preset time, repeat the above process until the second cycle is completed, and the second stage (S2103) is completed; enter the third stage, in the third stage, control the indoor heat exchanger to be used as a condenser to make the indoor temperature reach the first preset temperature value, control the air conditioning fan to run at the fourth air conditioning speed, control the drive part to flip the guide plate to achieve wind sweeping, turn on the humidifier, so that the indoor temperature reaches the first preset humidity, after running for the fifth preset time, turn off the air conditioning fan and humidifier, turn on the fresh air fan, and continue to run for the sixth preset time, repeat the above process until the third cycle is completed, and the third stage (S2104) is completed.

[0238] Please refer to Figure 22. In some embodiments, the controller is configured to: in the second mode (S2201), enter stage one; in the first stage, perform some or all of the following operations: operation one, wait for the seventh preset time; operation two, turn on the fresh air fan; operation two, turn on the fresh air fan for the eighth preset time, repeat the above process until the fourth cycle is completed, and complete stage one.

[0239] In some embodiments, in stage one, the seventh preset time is any value in the range of 1-2 hours, such as 1 hour, 1.5 hours, 1.8 hours, 2 hours, etc.

[0240] In some embodiments, in stage 1, the eighth preset time is X hours, and the fourth cycle number is M.

[0241] In some embodiments, the controller is configured to: in the second mode, enter stage two after completing stage one; in stage two, perform some or all of the following operations: operation one, wait for the ninth preset time; operation two, turn on the fresh air fan; operation three, turn on the fresh air fan for the tenth preset time, repeat the above process until the fifth cycle is completed, and complete stage two.

[0242] In some embodiments, the ninth preset time is any value in the range of 2.5-3.5 hours, such as 2.5 hours, 2.8 hours, 3 hours, 3.5 hours, etc.

[0243] In some embodiments, the tenth preset time is X hours, and the fifth cycle number is N.

[0244] In some embodiments, the controller is configured to: in the second mode, enter stage three after completing stage two; in stage three, perform some or all of the following operations: operation one, wait for the eleventh preset time and turn on the fresh air fan; operation two, turn on the fresh air fan; operation three, turn on the fresh air fan for the twelfth preset time, and repeat the above process until the sixth cycle is completed, completing stage three.

[0245] In some embodiments, the eleventh preset time is any value in the range of 5.5-7 hours, such as 5.5 hours, 5.8 hours, 6 hours, 6.5 hours, 6.8 hours, 7 hours, etc.

[0246] In some embodiments, the twelfth preset time is X hours, and the sixth cycle number is N.

[0247] In some embodiments, in the second mode, when the fresh air blower is turned on in stage one, stage two, and stage three, the fresh air blower runs at the maximum speed.

[0248] In some embodiments, the controller is configured to: in the second mode, exit the second mode after completing stage three.

[0249] In some embodiments, the controller is configured to: in the second mode, after completing stage three, determine whether the user exits the formaldehyde removal mode (S2205); if so, end, i.e. exit the formaldehyde removal mode and / or exit the second mode; if not, recycle the second mode (S2201).

[0250] As a specific embodiment, in the workflow shown in Figure 22, in the second mode, the controller is configured as follows: in the first stage, wait for the seventh preset time, turn on the fresh air fan, and continue for the eighth preset time, then repeat the above process until the fourth cycle is completed, completing stage one (S2202); after completing stage one, enter stage two, in stage two, wait for the ninth preset time, turn on the fresh air fan, and continue for the tenth preset time, then repeat the above process until the fifth cycle is completed, completing stage two (S2203); after completing stage two, enter stage three; in stage three, wait for the eleventh preset time, turn on the fresh air fan, and continue for the twelfth preset time, then repeat the above process until the sixth cycle is completed, completing stage three (S2204).

[0251] Please refer to Figure 23. In some embodiments, the controller is configured to: after entering the third mode (S2301), perform some or all of the following operations: operation one, turn on the fresh air fan; operation two, turn on the fresh air fan for the thirteenth preset time and then turn off the fresh air fan; operation three, wait for the fourteenth preset time and then turn on the fresh air fan for the fifteenth preset time.

[0252] In some embodiments, in the third mode, when the fresh air blower is turned on, the fresh air blower runs at the maximum speed.

[0253] In some embodiments, the thirteenth preset time is X hours.

[0254] In some embodiments, the fourteenth preset time is any value in the range of 2.5-3.5 hours, such as 2.5 hours, 3 hours, 3.2 hours, 3.5 hours, etc.

[0255] In some embodiments, the fifteenth preset time is also X hours.

[0256] In some embodiments, the controller is configured to: after completing the third mode, determine whether the user exits the formaldehyde removal mode (S2303); if so, end, i.e. exit the formaldehyde removal mode and / or exit the third mode; if not, recycle the third mode (S2301).

[0257] As a specific embodiment, in the workflow shown in Figure 23, in the third mode, the controller is configured to: turn on the fresh air fan, turn off the fresh air fan after the thirteenth preset time, wait for the fourteenth preset time, and then turn on the fresh air fan after the fifteenth preset time (S2302).

[0258] Please refer to Figure 24. In some embodiments, the controller is configured to: after entering the fourth mode (S2401), perform some or all of the following operations: Operation one, control the indoor heat exchanger 8 to be used as an evaporator to make the indoor temperature reach a second preset temperature; Operation two, turn on the humidifier to make the indoor humidity reach a second humidity; Operation three, turn on the fresh air fan.

[0259] In some embodiments, the second preset temperature is any value in the range of 20-28°C, such as 20°C, 23°C, 25°C, 28°C, etc.

[0260] In some embodiments, the second humidity is any value in the range of 40-55%, such as 40%, 42%, 45%, 48%, 55%, etc.

[0261] In some embodiments, the controller is configured to, in the fourth mode, further perform some or all of the following operations:

[0262] Operation 4: Control the driving member so that the air guide plate 10 faces upward;

[0263] Operation 5: The wind speed of the air-conditioning fan 9 is automatic.

[0264] In some embodiments, the automatic wind speed of the air-conditioning fan 9 is set according to the model of each air-conditioning.

[0265] In some embodiments, the controller is configured to: after completing the fourth mode, determine whether the user exits the formaldehyde removal mode (S2403); if so, end, i.e. exit the formaldehyde removal mode and / or exit the fourth mode; if not, recycle the fourth mode (S2401).

[0266] As a specific embodiment, in the workflow shown in Figure 24, in the fourth mode, the controller is configured to: control the indoor heat exchanger to be used as an evaporator to make the indoor temperature reach the second preset temperature, turn on the humidifier to make the indoor humidity reach the second humidity, turn on the fresh air fan, control the driving member to make the air guide plate face upward, and the wind speed of the air-conditioning fan is automatic wind (S2402).

[0267] Please refer to Figure 25. In some embodiments, the controller is configured to: in the fifth mode (S2501), perform some or all of the following operations: Operation 1, control the indoor heat exchanger 8 to be used as a condenser to make the indoor temperature reach the third preset temperature; Operation 2, after the sixteenth preset time, turn on the fresh air fan and continue for the seventeenth preset time.

[0268] In some embodiments, the third preset temperature is any value in the range of 20-28°C, such as 20°C, 23°C, 25°C, 28°C, etc.

[0269] In some embodiments, the sixteenth preset time is any value in the range of 2.5-3.5 hours, such as 2.5 hours, 3 hours, 3.5 hours, etc.

[0270] In some embodiments, the seventeenth preset time is X hours.

[0271] In some embodiments, the wind speed of the air-conditioning fan 9 is automatic wind.

[0272] In some embodiments, the controller is configured to: in the fifth mode, control the driving member to rotate so that the wind guide plate 10 flips up and down to achieve longitudinal wind sweeping.

[0273] In some embodiments, the controller is configured to: after completing the fifth mode, determine whether the user exits the formaldehyde removal mode (S2503); if so, end, i.e. exit the formaldehyde removal mode and / or exit the fifth mode; if not, recycle the fifth mode (S2501).

[0274] As a specific embodiment, in the workflow shown in Figure 25, in the fifth mode, the controller is configured to: control the indoor heat exchanger to be used as a condenser to make the indoor temperature reach the third preset temperature, and after continuing for the sixteenth preset time, turn on the fresh air fan and continue for the seventeenth preset time (S2502).

[0275] Please refer to Figure 26. In some embodiments, the controller is configured to: in the sixth mode (S2601), perform some or all of the following operations: Operation 1, turn on the fresh air fan and keep it for the eighteenth preset time, then turn off the fresh air fan; Operation 2, wait for the nineteenth preset time and then turn on the fresh air fan again.

[0276] In some embodiments, the eighteenth preset time is X, and the nineteenth preset time is any value in the range of 2.5-3.5 hours, such as 2.5 hours, 2.8 hours, 3 hours, 3.5 hours, etc.

[0277] In some embodiments, the controller is configured to: after completing the sixth mode, determine whether the user exits the formaldehyde removal mode (S2603); if so, end, i.e. exit the formaldehyde removal mode and / or exit the sixth mode; if not, recycle the sixth mode (S2601).

[0278] As a specific embodiment, in the workflow shown in Figure 26, in the sixth mode, the controller is configured to: turn on the fresh air fan and keep it for the eighteenth preset time, then turn off the fresh air fan, and wait for the nineteenth preset time to turn on the fresh air fan again (S2602).

[0279] Please refer to Figure 27. In some embodiments, the controller is configured to: in the seventh mode (S2701), perform some or all of the following operations: Operation one, turn on the fresh air fan and keep it for the twentieth preset time, then turn off the fresh air fan; Operation two, wait for the twenty-first preset time and then turn on the fresh air fan again.

[0280] In some embodiments, the twentieth preset time is X hours, and the twenty-first preset time is any value in the range of 2.5-3.5 hours, such as 2.5 hours, 2.8 hours, 3 hours, 3.2 hours, 3.5 hours, etc.

[0281] In some embodiments, the twentieth preset time is different from the eighteenth preset time, and the twenty-first preset time is different from the nineteenth preset time.

[0282] In some embodiments, the controller is configured to: after completing the seventh mode, determine whether the user exits the formaldehyde removal mode (S2703); if so, end, i.e. exit the formaldehyde removal mode and / or exit the seventh mode; if not, recycle the seventh mode (S2701).

[0283] As a specific embodiment, in the workflow shown in Figure 27, in the seventh mode, the controller is configured to: turn on the fresh air fan and keep it for the twentieth preset time, then turn off the fresh air fan, and wait for the twenty-first preset time before turning the fresh air fan back on (S2702).

[0284] Please refer to Figure 28. In some embodiments, the controller is configured to: in the eighth mode (S2801), perform some or all of the following operations: Operation one, turn on the fresh air fan and keep it running for the twenty-second preset time, then turn off the fresh air fan; Operation two, wait for the twenty-third preset time, then turn on the fresh air fan again and keep it running for the twenty-fourth preset time.

[0285] In some embodiments, the twenty-second preset time is X hours; the twenty-third preset time is any value in the range of 5-7 hours, such as 5 hours, 5.5 hours, 6 hours, 7 hours, etc.; the twenty-fourth preset time is X hours.

[0286] In some embodiments, the controller is configured to: after completing the eighth mode, determine whether the user exits the formaldehyde removal mode (S2803); if so, end, i.e. exit the formaldehyde removal mode and / or exit the eighth mode; if not, recycle the eighth mode (S2801).

[0287] As a specific embodiment, in the workflow shown in Figure 28, in the eighth mode, the controller is configured to: turn on the fresh air fan and continue for the twenty-second preset time, then turn off the fresh air fan, wait for the twenty-third preset time, then turn on the fresh air fan again and continue running for the twenty-fourth preset time (S2802).

[0288] Please refer to Figure 29. In some embodiments, the controller is configured to: in the ninth mode (S2901), perform some or all of the following operations: operation one, control the indoor heat exchanger 8 to be used as an evaporator to make the indoor temperature reach the fourth preset temperature; operation two, turn on the humidifier to make the indoor humidity reach the third humidity; operation three, turn on the fresh air fan.

[0289] In some embodiments, the fourth preset temperature is any value in the range of 18-28°C, such as 18°C, 20°C, 23°C, 28°C, etc.

[0290] In some embodiments, the wind speed of the air-conditioning fan 9 is automatic wind.

[0291] In some embodiments, the third humidity is any value in the range of 40-50%, such as 40%, 43%, 45%, 47%, 50%, etc.

[0292] In some embodiments, the controller is configured to: in the ninth mode, control the driving member to drive the air guide plate 10 upward.

[0293] In some embodiments, the controller is configured to: after completing the ninth mode, determine whether the user exits the formaldehyde removal mode (S2903); if so, end, i.e. exit the formaldehyde removal mode and / or exit the ninth mode; if not, recycle the ninth mode (S2901).

[0294] As a specific embodiment, in the workflow shown in Figure 29, in the ninth mode, the controller is configured to: control the indoor heat exchanger to be used as an evaporator to make the indoor temperature reach the fourth preset temperature, turn on the humidifier to make the indoor humidity reach the third humidity, and turn on the fresh air fan (S2902).

[0295] Please refer to Figure 30. In some embodiments, the controller is configured to: in the tenth mode (S3001), perform some or all of the following operations: Operation 1, control the indoor heat exchanger 8 to be used as a condenser so that the indoor temperature reaches the fifth preset temperature; Operation 2, after the twenty-fifth preset time, turn on the fresh air fan and turn off the fresh air fan after the twenty-sixth preset time.

[0296] In some embodiments, the fifth preset temperature is any value in the range of 20-28°C, such as 20°C, 23°C, 25°C, 28°C, etc.

[0297] In some embodiments, the wind speed of the air-conditioning fan 9 is automatic wind.

[0298] In some embodiments, the twenty-fifth preset time is any value in the range of 5-7 hours, such as 5 hours, 5.5 hours, 6 hours, 6.3 hours, 7 hours, etc.

[0299] In some embodiments, the twenty-sixth preset time is X hours.

[0300] In some embodiments, the controller is configured to: in the tenth mode, control the driving member to rotate so that the wind guide plate 10 flips up and down to achieve longitudinal wind sweeping.

[0301] In some embodiments, the controller is configured to: after completing the tenth mode, determine whether the user exits the formaldehyde removal mode (S3003); if so, end, i.e. exit the formaldehyde removal mode and / or exit the tenth mode; if not, recycle the tenth mode (S3001).

[0302] As a specific embodiment, in the workflow shown in Figure 30, in the tenth mode, the controller is configured to: control the indoor heat exchanger to be used as a condenser so that the indoor temperature reaches the fifth preset temperature, and after continuing for the twenty-fifth preset time, turn on the fresh air fan and turn off the fresh air fan after continuing for the twenty-sixth preset time (S3002).

[0303] Please refer to Figure 31. In some embodiments, the controller is configured to: in the eleventh mode (S3101), perform some or all of the following operations: Operation one, turn on the fresh air fan and turn off the fresh air fan after the twenty-seventh preset time; Operation two, wait for the twenty-eighth preset time and then turn on the fresh air fan.

[0304] In some embodiments, the twenty-seventh preset time is X hours, and the twenty-eighth preset time is any value in the range of 5-7 hours, such as 5 hours, 6 hours, 7 hours, etc.

[0305] In some embodiments, the controller is configured to: after completing the eleventh mode, determine whether the user has exited the formaldehyde removal mode (S3103), and if so, end the process, i.e., exit the formaldehyde removal mode and / or exit the eleventh mode. If not, recycle the eleventh mode (S3101).

[0306] As a specific embodiment, in the workflow shown in FIG31 , in mode eleven, the controller is configured to: turn on the fresh air fan and turn off the fresh air fan after the twenty-seventh preset time, and wait for the twenty-eighth preset time to turn on the fresh air fan (S3102).

[0307] Please refer to Figure 32. In some embodiments, the controller is configured to: in the twelfth mode (S3201), perform some or all of the following operations: Operation one, turn on the fresh air fan and turn off the fresh air fan after the twenty-ninth preset time; Operation two, wait for the thirtieth preset time and then turn on the fresh air fan.

[0308] In some embodiments, the twenty-ninth preset time is X hours, and the thirtieth preset time is any value in the range of 5.5-7 hours, such as 5.5 hours, 5.8 hours, 6 hours, 6.8 hours, 7 hours, etc.

[0309] In some embodiments, the controller is configured to: after completing the twelfth mode, determine whether the user exits the formaldehyde removal mode (S3203); if so, end, i.e. exit the formaldehyde removal mode and / or exit the twelfth mode; if not, recycle the twelfth mode (S3201).

[0310] As a specific embodiment, in the workflow shown in FIG32 , in mode 12, the controller is configured to: turn on the fresh air fan and turn off the fresh air fan after the twenty-ninth preset time, and wait for the thirtieth preset time to turn on the fresh air fan (S3202).

[0311] In some embodiments, if the current scenario is more than three years after occupancy, the formaldehyde removal mode is not performed.

[0312] In some embodiments, the air conditioner further includes an indoor air conditioner unit and an outdoor air conditioner unit. An outdoor heat exchanger is provided in the outdoor air conditioner unit, and a refrigerant flows between the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange.

[0313] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An air conditioner, comprising: Air conditioner indoor unit; The air conditioner indoor unit comprises: A casing, wherein the casing is provided with an indoor air inlet and an outdoor air inlet; An indoor heat exchanger, wherein the indoor heat exchanger is arranged inside the casing; A heat exchange fan, the heat exchange fan is arranged inside the casing, and indoor air is introduced into the casing from a heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan; a steam generating device, disposed in the housing and in communication with the indoor air inlet and / or the outdoor air inlet, the steam generating device comprising an electric heating element, the electric heating element being configured to: heat liquid to generate steam and release the steam to the outside of the housing; The controller is configured to: when the indoor temperature is within a first preset range, turn on the steam generating device, and the electric heating element operates at a first power to generate steam to heat and humidify the indoor air; When the indoor temperature is lower than the lower limit of the first preset range, the indoor heat exchanger is used as a condenser to run for a first preset heat exchange time, the speed of the heat exchange fan is increased, the steam generating device is turned on, and the electric heating element is operated at a second power to generate steam to heat and humidify the indoor air, and the second power is greater than the first power; When the indoor temperature is higher than the upper limit of the first preset range, the indoor heat exchanger stops operating; When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

2. The air conditioner according to claim 1, wherein the first preset range includes a first range and a second range, and a lower limit value of the first range is higher than an upper limit value of the second range; The controller is configured to: when the indoor temperature is within the second range, control the indoor heat exchanger to function as a condenser to run for a second preset heat exchange time, control the heat exchange fan to increase its speed, turn on the steam generating device, and control the electric heating element to operate at a first power to generate steam to heat and humidify the indoor air.

3. The air conditioner according to claim 1, wherein the controller is configured as follows: When the indoor temperature is higher than the upper limit of the first preset range, detecting whether the indoor humidity is higher than the first preset humidity; When the indoor humidity is higher than a first preset humidity, the steam generating device is controlled to stop operating.

4. The air conditioner according to claim 3, wherein the controller is configured as follows: When the indoor humidity is higher than the first preset humidity, detecting the indoor formaldehyde concentration; When the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room.

5. The air conditioner according to claim 3, wherein the controller is configured as follows: When the indoor temperature is higher than the upper limit of the first preset range and it is detected that the indoor humidity is not higher than the first preset humidity, the steam generating device is controlled to start running, and the electric heating element is controlled to run at a first power to generate steam to heat and humidify the indoor air.

6. The air conditioner according to claim 5, wherein the controller is configured as follows: When the indoor formaldehyde concentration is higher than a first preset concentration, opening the outdoor air inlet to introduce fresh air into the room; When the indoor formaldehyde concentration is lower than a second preset concentration, the outdoor air inlet is closed and the indoor air inlet is opened.

7. An air conditioner, comprising: Air conditioner indoor unit; The air conditioner indoor unit comprises: A casing, wherein the casing is provided with an indoor air inlet and an outdoor air inlet; An indoor heat exchanger, wherein the indoor heat exchanger is arranged inside the casing; A heat exchange fan, the heat exchange fan is arranged inside the casing, and indoor air is introduced into the casing from a heat exchange air inlet through the operation of the heat exchange fan, and heat is exchanged through the indoor heat exchanger to form a heat exchange airflow, and the heat exchange airflow is output to the room under the operation of the heat exchange fan; A steam generating device is disposed in the housing and is connected to the indoor air inlet and / or the outdoor air inlet. The air outlet is connected, the steam generating device comprises an electric heating element, and the electric heating element is configured to: heat the liquid to generate steam and release it to the outside of the casing; The human body sensing sensor is configured to: detect whether there is someone in the room; The controller is configured as: When it is detected that there is someone in the room, the steam generating device is turned on, and the electric heating element operates at a second power to generate steam to heat and humidify the indoor air; After the electric heating element operates at the second power for a third preset heat exchange time, the steam generating device is stopped and the outdoor air inlet is opened to introduce fresh air into the room.

8. The air conditioner according to claim 7, wherein the controller is configured as follows: When it is detected that there is someone in the room, after the outdoor air inlet is opened for a fourth preset heat exchange time, the outdoor air inlet is closed, the indoor air inlet is opened, and the electric heating element is controlled to operate at a second power to generate steam to heat and humidify the indoor air.

9. The air conditioner according to claim 7, wherein the controller is configured as follows: When it is detected that no one is in the room, the indoor heat exchanger stops running, the heat exchange fan is controlled to start running at a first speed for a first time, and then the indoor formaldehyde concentration is detected; When it is detected that the indoor formaldehyde concentration is higher than the set amplitude of the initial indoor formaldehyde concentration, the rotation speed of the heat exchange fan is increased.

10. The air conditioner according to claim 9, wherein the controller is configured as follows: When it is detected that the indoor formaldehyde concentration is not higher than the set amplitude of the initial indoor formaldehyde concentration, the heat exchange fan is controlled to run at a first speed.

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