Air conditioner

Abstract

The application relates to an air conditioner, comprising: an air conditioner indoor unit and an air conditioner outdoor unit; the air conditioner indoor unit comprises: a shell, an indoor heat exchanger, a heat exchange fan, a humidifier, a human sensor, an indoor temperature sensor, an indoor humidity sensor and a formaldehyde concentration sensor; the air conditioner outdoor unit at least comprises a compressor which is communicated with the indoor heat exchanger through a refrigerant circuit; a controller is configured to: when the indoor heat exchanger works as a condenser, the human sensor detects that there is a person in the room, and the indoor formaldehyde concentration is not lower than a second preset concentration, the controller controls to reduce the operation frequency of the compressor, controls the humidifier to stop operation, controls the heat exchange fan to operate at an upper limit value of a rated power range of the heat exchange fan, and controls a fresh air fan to operate at an upper limit value of a rated power range of the fresh air fan; when the indoor formaldehyde concentration is lower than the second preset concentration, the controller controls to reduce the operation power of the heat exchange fan and the fresh air fan, so as to improve the formaldehyde release and de-aldehyde effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. BACKGROUND

[0002] At present, with the improvement of people's living quality and level, health is becoming more and more important in the family scene. For the home appliance market, more and more home appliances are developing around the theme of "health". Formaldehyde, the number one killer affecting the health of the family scene, is becoming more and more popular among users to find reliable and effective ways to remove aldehyde. As a class I carcinogen, formaldehyde exists in two forms in the room: combined formaldehyde in furniture boards and free formaldehyde in indoor air. The combined formaldehyde in furniture boards will gradually release into the air at room temperature, continuously increasing the content of free formaldehyde in the air and exacerbating the threat to human health. There is no mature technology that can completely remove the formaldehyde contained in furniture boards in a short time.

[0003] Air conditioners usually include an air conditioner indoor unit and an air conditioner outdoor unit, and some air conditioners have the function of removing formaldehyde.

[0004] The air conditioner indoor unit includes a shell, an indoor heat exchanger and a formaldehyde removal filter screen, and a heat exchange air outlet is formed on the shell. The indoor heat exchanger is arranged inside the shell, and the refrigerant flowing inside the indoor heat exchanger exchanges heat with the indoor air to form a heating cycle or a refrigeration cycle, and the indoor air flows to the outside of the shell after heat exchange through the heat exchange air outlet. The formaldehyde removal filter screen is used to adsorb formaldehyde in the indoor air, and the formaldehyde removal filter screen has a service life and needs to be replaced frequently.

[0005] Some air conditioner indoor units also include a humidifier to increase indoor humidity, but there is no disclosure of using a humidifier in combination with an indoor heat exchanger to remove formaldehyde.

[0006] In related technologies, indoor air flows through a formaldehyde removal filter screen to remove formaldehyde gas in the indoor air, but current air conditioner indoor units remove formaldehyde in a single way, with low formaldehyde removal efficiency, and the formaldehyde removal filter screen needs to be replaced frequently, which cannot implement different formaldehyde removal methods for different indoor formaldehyde concentrations and whether there is a person in the room. SUMMARY

[0007] The present application at least partly solves one of the problems in the related art.

[0008] Therefore, the present application aims to provide an air conditioner to facilitate the implementation of corresponding formaldehyde removal methods for different indoor formaldehyde concentrations and whether there is a person in the room, to ensure that the formaldehyde removal effect and the energy consumption of the air conditioner are optimal.

[0009] To achieve the above object, the present application provides an air conditioner, which comprises:

[0010] an air conditioner indoor unit and an air conditioner outdoor unit;

[0011] the air conditioner indoor unit comprises:

[0012] a shell with a heat exchange air outlet;

[0013] an indoor heat exchanger arranged inside the shell, which exchanges heat between the refrigerant flowing inside and indoor air to form a heating cycle or a refrigeration cycle, and the indoor air flows to the outside of the shell through the heat exchange air outlet after heat exchange;

[0014] a heat exchange fan for driving indoor air to be transported to the indoor unit through the heat exchange air outlet;

[0015] a humidifier arranged in the shell, which is used to generate steam, and the steam flows to the outside of the shell through the heat exchange air outlet;

[0016] a human sensor for detecting whether there is a person in the indoor unit;

[0017] an indoor temperature sensor for detecting the indoor temperature;

[0018] an indoor humidity sensor for detecting the indoor humidity;

[0019] a formaldehyde concentration sensor for detecting the indoor formaldehyde concentration;

[0020] the air conditioner outdoor unit at least comprises a compressor, which is connected to the indoor heat exchanger through a refrigerant circuit;

[0021] the controller is configured to: when the indoor heat exchanger works as a condenser, the human sensor detects that there is a person in the indoor unit, and the indoor formaldehyde concentration is not lower than a second preset concentration, control to reduce the operating frequency of the compressor, control the humidifier to stop running, control the heat exchange fan to run at the upper limit value of the rated power range of the heat exchange fan, and control the fresh air fan to run at the upper limit value of the rated power range of the fresh air fan;

[0022] when the indoor formaldehyde concentration is lower than the second preset concentration, control to reduce the operating power of the heat exchange fan and the fresh air fan.

[0023] In the present application, if the indoor heat exchanger works as a condenser to perform the formaldehyde removal cycle when the human sensor detects that there is no one in the room, if the controller receives an instruction to run other modes, the operation power of the heat exchange fan is controlled to be reduced, so that the heat exchange fan runs at low speed. The operating frequency of the compressor is controlled to be reduced, thereby reducing the heating capacity of the indoor heat exchanger. The operating power of the fresh air fan is controlled to be increased, so that the fresh air fan keeps running at high speed, thereby discharging the residual formaldehyde content in the room to the outdoor. The indoor heat exchanger is controlled to work as an evaporator, so that the indoor heat exchanger dehumidifies and reduces the indoor humidity. When it is detected that the indoor formaldehyde concentration is reduced to be lower than the second preset concentration, the compressor, the heat exchange fan and the fresh air fan are controlled to stop running.

[0024] In some embodiments of the present application, the controller is configured to:

[0025] When the indoor heat exchanger works as a condenser, the indoor temperature sensor is controlled to detect the indoor temperature, and the indoor humidity sensor is controlled to detect the indoor humidity;

[0026] When the indoor temperature is lower than the first preset temperature and the indoor humidity is not lower than the first preset humidity, the operating frequency of the compressor is controlled to be increased.

[0027] In some embodiments of the present application, the controller is configured to:

[0028] When the indoor heat exchanger works as a condenser, the indoor temperature sensor is controlled to detect the indoor temperature, and the indoor humidity sensor is controlled to detect the indoor humidity;

[0029] When the indoor temperature is lower than the first preset temperature and the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is controlled to be increased, and the humidifier is controlled to be turned on.

[0030] In some embodiments of the present application, the controller is configured to:

[0031] When the indoor heat exchanger works as a condenser, the indoor temperature sensor is controlled to detect the indoor temperature, and the indoor humidity sensor is controlled to detect the indoor humidity;

[0032] When the indoor temperature is not lower than the first preset temperature and the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is controlled to be unchanged, and the humidifier is controlled to be turned on.

[0033] In some embodiments of the present application, the controller is configured to:

[0034] When the indoor heat exchanger works as a condenser, the indoor temperature sensor is controlled to detect the indoor temperature, and the indoor humidity sensor is controlled to detect the indoor humidity;

[0035] When the indoor temperature is not lower than the first preset temperature and the indoor humidity is not lower than the first preset humidity, the operation frequency of the compressor is controlled to be unchanged, the operation state of the humidifier is controlled to be unchanged, and the heat exchange fan is controlled to operate at the upper limit value of the rated power range of the heat exchange fan.

[0036] In some embodiments of the present application, a fresh air fan is configured to deliver outdoor fresh air to the indoor space.

[0037] The controller is configured to:

[0038] When the indoor heat exchanger works as a condenser and it is detected that the indoor temperature is not lower than the first preset temperature and the indoor humidity is not lower than the first preset humidity, the controller is configured to control the formaldehyde concentration sensor to be turned on.

[0039] When the formaldehyde concentration sensor detects that the growth value of the indoor formaldehyde concentration within a preset time period is less than a first preset range, the controller is configured to control the fresh air fan to operate at the upper limit value of the rated power range of the fresh air fan.

[0040] In some embodiments of the present application, the air conditioner further comprises:

[0041] A fresh air fan is configured to deliver outdoor fresh air to the indoor space.

[0042] The controller is configured to:

[0043] When the indoor heat exchanger works as a condenser and the people sensor detects that there is no one in the indoor space, the controller is configured to control the operation power of the heat exchange fan to be reduced, control the operation power of the fresh air fan to be increased, control the indoor heat exchanger to work as an evaporator, and control the indoor heat exchanger to dehumidify. When it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, the controller is configured to control the compressor, the heat exchange fan and the fresh air fan to stop operating.

[0044] In some embodiments of the present application, the controller is configured to:

[0045] When the indoor heat exchanger works as a condenser and it is detected by the people sensor that there is someone in the indoor space, the controller is configured to control the heat exchange fan to operate at a first power lower than the upper limit value of the rated power of the heat exchange fan, control the fresh air fan to operate at a second power lower than the upper limit value of the rated power of the fresh air fan, and control the indoor heat exchanger to work as an evaporator, so that the indoor heat exchanger dehumidifies.

[0046] In some embodiments of the present application, the controller is configured to control the fresh air fan to stop operating when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than a second preset concentration.

[0047] The application also provides an air conditioner, which comprises:

[0048] an air conditioner indoor unit and an air conditioner outdoor unit;

[0049] the air conditioner indoor unit comprises:

[0050] a shell, which is provided with a heat exchange air outlet;

[0051] an indoor heat exchanger, which is arranged inside the shell and exchanges heat between the refrigerant flowing inside and indoor air to form a heating cycle or a refrigeration cycle, and the indoor air flows to the outside of the shell through the heat exchange air outlet after heat exchange;

[0052] a heat exchange fan, which is used to drive the indoor air to flow to the indoor unit through the heat exchange air outlet;

[0053] a humidifier, which is arranged in the shell and is used to generate steam, and the steam flows to the outside of the shell through the heat exchange air outlet;

[0054] an aldehyde removal module, which is used to remove formaldehyde in the air flowing through the aldehyde removal module;

[0055] a human sensor, which is used to detect whether there is a person in the indoor unit;

[0056] an indoor temperature sensor, which is used to detect the indoor temperature;

[0057] an indoor humidity sensor, which is used to detect the indoor humidity;

[0058] a formaldehyde concentration sensor, which is used to detect the indoor formaldehyde concentration;

[0059] the air conditioner outdoor unit, which comprises at least a compressor, and the compressor and the indoor heat exchanger are connected through a refrigerant circuit;

[0060] the controller is configured to: when the indoor heat exchanger works as a condenser, the human sensor detects that there is a person in the indoor unit, and the indoor formaldehyde concentration is not lower than a second preset concentration, control the aldehyde removal module to be turned on, control the operating frequency of the compressor to be reduced, control the humidifier to stop running, control the heat exchange fan to run at an upper limit value of the rated power range of the heat exchange fan, and control the fresh air fan to run at an upper limit value of the rated power range of the fresh air fan;

[0061] when the indoor formaldehyde concentration is lower than the second preset concentration, control the operating power of the heat exchange fan and the fresh air fan to be reduced.

[0062] Additional aspects and advantages of the application will be made apparent by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0063] Figure 1 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application;

[0064] Figure 2 is a schematic diagram of the overall structure of a wall-mounted air conditioner indoor unit according to an embodiment of the present application; Figure One

[0065] Figure 3 is a schematic diagram of the overall structure of a wall-mounted air conditioner indoor unit according to an embodiment of the present application; Figure Two

[0066] Figure 4 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when a person is detected in the room;

[0067] Figure 5 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when no person is detected in the room;

[0068] Figure 6 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when operating in a heating mode; Figure One

[0069] Figure 7 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when operating in a heating mode; Figure Two

[0070] Figure 8 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when operating in a heating mode; Figure Three

[0071] Figure 9 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when operating in a heating mode; Figure Four

[0072] Figure 10 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when the formaldehyde reaches an equilibrium state;

[0073] Figure 11 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when operating in a cooling mode; Figure One

[0074] Figure 12 is a flowchart of the operation of an air conditioner indoor unit according to an embodiment of the present application when operating in a cooling mode; Figure Two ​​​​​​​​

[0075] Figure 13 is the working process of the air conditioner indoor unit according to one of the embodiments of the present application when operating in the cooling mode Figure Three ;

[0076] Figure 14 is the working process of the air conditioner indoor unit according to one of the embodiments of the present application when operating in the cooling mode Figure Four ;

[0077] Figure 15 is the working process of the air conditioner indoor unit according to one of the embodiments of the present application when operating in the cooling mode Figure Five ;

[0078] Figure 16 is the working process of the air conditioner indoor unit according to one of the embodiments of the present application when operating in the cooling mode Figure Six .

[0079] In the above figures: housing 100; air conditioner outdoor unit 200. DETAILED DESCRIPTION

[0080] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0081] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In the present application, unless explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below", and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0083] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the specification and their features can be combined and combined by those skilled in the art without contradiction.

[0084] In the following, the present application will be specifically described through exemplary embodiments. However, it should be understood that the elements, structures, and features in one embodiment can also be beneficially combined into other embodiments without further description.

[0085] In the present application, the air conditioner includes an air conditioner indoor unit and an air conditioner outdoor unit 200. When the air conditioner operates in a cooling mode, the air conditioner performs a cooling cycle of the air conditioner indoor unit by using a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

[0086] The cooling cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to air that has been adjusted and heat-exchanged, provides cold energy to an indoor space through the heat absorption process of the refrigerant, and achieves temperature adjustment of the indoor space.

[0087] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state to discharge refrigerant gas in a high-temperature and high-pressure state, and the discharged refrigerant gas flows into the outdoor heat exchanger. The outdoor heat exchanger condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0088] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into low-pressure liquid-phase refrigerant.

[0089] The indoor 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 indoor heat exchanger can achieve a refrigeration effect by exchanging heat with indoor air using latent heat of evaporation of the refrigerant.

[0090] The air conditioning indoor unit can adjust the temperature of the indoor space throughout the refrigeration cycle.

[0091] When the air conditioner operates in a heating mode, the air conditioner performs a heating cycle of the air conditioning indoor unit through the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger.

[0092] The heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to air that has been adjusted and heat-exchanged, provides heat to the indoor space through the heat release process of the refrigerant, and achieves temperature adjustment of the indoor space.

[0093] When the heating cycle is operated, the compressor compresses the refrigerant gas in a low-temperature and low-pressure state to discharge refrigerant gas in a high-temperature and high-pressure state, and the discharged refrigerant gas flows into the indoor heat exchanger. The indoor heat exchanger condenses the compressed refrigerant into a liquid phase, and heat generated by condensation is exchanged with indoor air flowing through the indoor heat exchanger, thereby increasing the indoor temperature.

[0094] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0095] 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 outdoor air using latent heat of evaporation of the refrigerant.

[0096] The air conditioning indoor unit can adjust the temperature of the indoor space throughout the heating cycle.

[0097] The air conditioning outdoor unit 200 includes at least a compressor and an outdoor heat exchanger, the air conditioning indoor unit includes at least an indoor heat exchanger, and the expansion valve can be provided in the air conditioning indoor unit or the air conditioning outdoor unit 200.

[0098] 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 conditioning indoor unit functions as a heater in a heating mode, and when the indoor heat exchanger functions as an indoor heat exchanger, the air conditioning indoor unit functions as a cooler in a cooling mode.

[0099] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0100] As shown in FIG. 1, in one embodiment of the air conditioner of the present application, Figures 1 to 15

[0101] ​The air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit 200, the air conditioner outdoor unit 200 comprises a compressor and an outdoor heat exchanger, and the air conditioner indoor unit comprises an indoor heat exchanger, and the expansion valve can be arranged in the air conditioner indoor unit or the air conditioner outdoor unit 200.

[0102] The air conditioner of the present application comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve and a refrigerant circulation pipeline, the indoor heat exchanger and the outdoor heat exchanger are connected with the compressor. The expansion valve is an electronic expansion valve, which is connected between the indoor heat exchanger and the outdoor heat exchanger, and can expand the liquid refrigerant after the condensation process into low-pressure liquid refrigerant.

[0103] The compressor comprises a suction port and a discharge port, the refrigerant after the evaporation process enters the compressor from the suction port, and the gaseous refrigerant compressed by the compressor is discharged from the discharge port.

[0104] The indoor heat exchanger and the outdoor heat exchanger are connected through a four-way valve and the compressor in the refrigerant circuit, and the four-way valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port. The suction port of the compressor is fixedly connected with the first valve port, and the discharge port of the compressor is fixedly connected with the third valve port.

[0105] In the refrigerant circuit, the refrigerant can sequentially circulate through the compressor, the indoor heat exchanger, the expansion valve and the outdoor heat exchanger.

[0106] When the air conditioner is in the cooling mode, the first valve port is connected with the second valve port, and the third valve port is connected with the fourth valve port. When the air conditioner is in the heating mode, the first valve port is connected with the fourth valve port, and the second valve port is connected with the third valve port.

[0107] In some embodiments, the air conditioner indoor unit comprises a shell 100, an indoor heat exchanger, a humidifier, a heat exchange fan, a fresh air module, an indoor temperature sensor, an indoor humidity sensor, a formaldehyde concentration sensor and a human sensor.

[0108] The shell 100 forms the overall appearance of the air conditioner indoor unit, and the indoor heat exchanger, the heat exchange fan and the fresh air fan are arranged inside the shell 100.

[0109] The shell 100 is provided with an indoor air inlet, an outdoor air inlet, a heat exchange air outlet and a fresh air outlet.

[0110] The indoor heat exchanger is arranged inside the shell 100, and the refrigerant flowing inside the indoor heat exchanger exchanges heat with indoor air to form a heating cycle or a cooling cycle, and the indoor air flows to the outside of the shell 100 through the heat exchange air outlet after flowing through the indoor heat exchanger.

[0111] The heat exchange fan can be a cross-flow fan. When the heat exchange fan is started, indoor air is introduced into the housing 100 by the driving of the heat exchange fan, and the heat exchange fan is used to provide power for the indoor air to flow from the indoor air inlet to the heat exchange outlet through the inside of the housing 100. The heat exchange fan includes a heat exchange fan and a heat exchange driving motor, and the heat exchange driving motor drives the heat exchange fan to rotate.

[0112] The indoor air enters the housing 100 through the indoor air inlet, exchanges heat with the heat exchanger, and then flows out from the heat exchange outlet on the housing 100 to the indoor space, achieving air supply of the indoor air.

[0113] The humidifier is arranged in the housing 100, and the humidifier is used to generate steam. The steam can flow to the outside of the housing 100 through the heat exchange outlet under the driving of the heat exchange fan.

[0114] The fresh air module is arranged in the space in the housing 100 of the air conditioner indoor unit. The fresh air module includes a fresh air fan shell, and the fresh air fan shell is provided with a fresh air inlet and a fresh air outlet. The fresh air inlet is arranged in correspondence with the outdoor air inlet on the housing 100, and a fresh air cavity is formed in the fresh air module to communicate the fresh air inlet and the fresh air outlet. The fresh air inlet can be arranged at the top, front side, rear side, left side or right side of the fresh air fan shell. Correspondingly, the outdoor air inlet can be arranged at the top, front side, rear side, left side or right side of the housing 100 in correspondence with the fresh air inlet.

[0115] The fresh air outlet can be arranged around the air conditioner air outlet of the housing 100, so that the fresh air flowing out of the fresh air outlet mixes with the air conditioner air flowing out of the heat exchange outlet, reducing the influence of the fresh air on the temperature and humidity of the indoor environment and improving the comfort of the user when using the fresh air module. It can be arranged that the fresh air outlet can also be arranged at the top, front side, rear side, left side or right side of the housing 100.

[0116] The fresh air module includes a fresh air fan arranged in the fresh air cavity. The fresh air fan can be a centrifugal fan. When the fresh air fan is started, outdoor air is introduced into the indoor space through the fresh air module, and the fresh air fan is used to provide power for the fresh air to flow from the fresh air inlet to the fresh air outlet. The fresh air fan includes a fan and a driving motor, and the driving motor drives the fan to rotate.

[0117] The fresh air module further includes a fresh air pipe communicating the indoor and outdoor spaces, and the fresh air pipe is arranged in correspondence with the outdoor air inlet.

[0118] In some embodiments, the fresh air pipe is arranged in the air pipe installation hole formed in the wall, one end of the fresh air pipe is directed towards the indoor space and connected with the fresh air inlet of the fresh air module, the other end of the fresh air pipe is directed towards the outdoor space and provided with an air inlet, and the fresh air pipe is in communication with the outdoor space through the air inlet. Under the action of the fresh air fan, the outdoor fresh air enters the fresh air module from the outdoor space along the fresh air pipe and is blown to the indoor space from the fresh air outlet, so as to introduce the outdoor fresh air to the indoor space.

[0119] The indoor temperature sensor is arranged at the indoor air inlet and used to detect the indoor temperature. The indoor humidity sensor is arranged at the indoor air inlet and used to detect the indoor humidity.

[0120] Optionally, the indoor temperature sensor and the indoor humidity sensor can be integrated into a temperature and humidity sensor. The temperature and humidity sensor is used to detect the indoor temperature and the indoor humidity.

[0121] The formaldehyde concentration sensor is arranged at the heat exchange outlet and used to detect the indoor formaldehyde concentration.

[0122] The human sensor is arranged on the housing 100 and used to detect whether there is a person in the indoor space. The human sensor can be an infrared human sensor.

[0123] The indoor heat exchanger further comprises an inner air deflector and an outer air deflector. The inner air deflector is arranged at the heat exchange outlet and located inside the housing 100. The outer air deflector is arranged at the heat exchange outlet of the air conditioner indoor unit and in communication with the indoor air inlet. Under the drive of the heat exchange fan, the indoor air enters the housing 100 from the indoor air inlet, flows through the indoor heat exchanger and is discharged to the indoor space through the heat exchange outlet.

[0124] When the air conditioner indoor unit is a cabinet type air conditioner indoor unit, the inner air deflector can swing up and down to swing the indoor air up and down. The outer air deflector can rotate left and right to swing the indoor air.

[0125] When the air conditioner indoor unit is a hanging type air conditioner indoor unit, the inner air deflector can swing left and right to swing the indoor air left and right. The outer air deflector can rotate up and down to swing the indoor air.

[0126] Referring to Figures 4-15 In some embodiments, when the controller receives a command to start the de-aldehyde mode, the human sensor is started to detect whether there is a person in the indoor space.

[0127] When the human sensing sensor detects that there is a person in the room, if the indoor heat exchanger of the air conditioner indoor unit is in a working state at this time, the controller controls the working state of the indoor heat exchanger and the humidifier to remain unchanged. At this time, the control command of the formaldehyde removal program to the temperature and humidity of the air conditioner is inhibited, and the controller runs with the highest priority of the temperature and humidity set by the user.

[0128] After the controller receives the command to start the formaldehyde removal mode, it still runs with the highest priority of the temperature and humidity set by the user, thereby avoiding the influence of the change in the regulation of the indoor temperature and humidity when the dehumidification program is running on the user.

[0129] When the controller receives the command to start the formaldehyde removal mode, if the inner air deflector and the outer air deflector are in a non-windless state at this time, the movement state of the inner air deflector and the outer air deflector is controlled to remain unchanged, so that the resistance of the indoor air flowing out of the heat exchange air outlet is small, and the indoor air can be quickly circulated.

[0130] If the inner air deflector and the outer air deflector are in a windless state at this time, the controller controls the inner air deflector and the outer air deflector to be adjusted to a state of preventing direct blowing, and controls the rotation speed of the heat exchange fan to remain unchanged at the rotation speed set by the user, thereby avoiding the influence of the large rotation speed of the heat exchange fan on the user.

[0131] When the compressor stops running, the user starts the formaldehyde removal mode, at this time the controller receives the command to start the formaldehyde removal mode, and the controller controls the air conditioner indoor unit to issue a prompt, thereby reminding the user to start the air conditioner first, and then start the formaldehyde removal mode, so that the formaldehyde removal mode cannot be started alone, in order to facilitate the normal operation of the formaldehyde removal mode.

[0132] It can be set that in some embodiments, a prompt sticker can be set on the control panel of the shell 100, or when the user starts the formaldehyde removal function alone on the control software corresponding to the air conditioner indoor unit, the control software will pop up corresponding prompt information. The prompt information can be set as "please start the air conditioner first", thereby reminding the user to start the air conditioner first when correctly operating the formaldehyde removal mode.

[0133] In some embodiments, when the human sensing sensor detects that there is a person in the room, the air conditioner indoor unit issues a prompt to remind the user to leave the room within a preset time. After the preset time of the prompt, the human sensing sensor detects whether there is a person in the room again.

[0134] Among them, the way the air conditioner indoor unit issues a prompt includes the air conditioner indoor unit issuing a voice prompt or the air conditioner indoor unit issuing a prompt through its control software. The preset time can be set to five minutes.

[0135] When it is detected that there is no one in the room, the controller controls to start executing the formaldehyde removal cycle.

[0136] In some embodiments, when the user starts the formaldehyde removal mode, the controller controls the air conditioner to issue a prompt to the user to remind the user not to return to the indoor during the formaldehyde removal time, and to return after the formaldehyde removal time. The formaldehyde removal time can be set to two hours. This is beneficial to avoid the user returning to the indoor during the formaldehyde removal cycle, at which time the indoor formaldehyde concentration is high, the indoor temperature and the indoor humidity are high, which is easy to cause discomfort to the user, and is not conducive to the formaldehyde removal cycle.

[0137] In some embodiments, the air conditioner indoor unit is also provided with a formaldehyde removal module, which is used to remove formaldehyde in indoor air. The formaldehyde removal module removes formaldehyde in indoor air in a manner including but not limited to physical adsorption (for example: activated carbon and other adsorption materials), chemical bonding (for example: potassium permanganate chemical reaction and the like), catalytic oxidation (for example: photocatalyst catalysis, normal temperature catalyst catalysis, high temperature catalyst catalysis) and other technical means.

[0138] In some embodiments, when the controller obtains that the current date is a preset date, the controller controls the air conditioner to switch to the formaldehyde removal mode. In the formaldehyde removal mode, the air conditioner runs a heating cycle, and controls the indoor heat exchanger to work as a condenser. The preset date can be set to a working day, which refers to the user's working time from Monday to Friday.

[0139] When the controller obtains that the current date is not the preset date, it means that it is a rest day, which refers to Saturday and Sunday.

[0140] The air conditioner can be linked with the indoor smart device to obtain whether the current time is a preset time. The smart device can be a mobile phone, a computer or a smart voice assistant. The linkage can be Bluetooth or cloud transmission.

[0141] When the formaldehyde removal mode is running, the people sensing sensor detects that the indoor is in an unoccupied state, and the controller controls the formaldehyde removal module to be turned off. Because the formaldehyde removal module has a service life limit, when the indoor is unoccupied, the formaldehyde removal module is set to be intermittently turned on, which can improve the service life of the formaldehyde removal module, and then at least one formaldehyde removal cycle is performed.

[0142] When the formaldehyde removal mode is started, the controller controls the air conditioner to run multiple formaldehyde removal cycles, and the number of formaldehyde removal cycles can be set to four. Because one formaldehyde removal cycle generally needs two hours, and the default working time of the user in a day is eight hours, four formaldehyde removal cycles are started when the indoor is unoccupied, which can perform multiple formaldehyde removal cycles before the user returns to the indoor, thereby improving the formaldehyde removal efficiency.

[0143] One formaldehyde removal cycle includes: judging whether the indoor heat exchanger works as a condenser, when the indoor heat exchanger works as a condenser, the controller controls the indoor temperature sensor to detect the indoor temperature, and controls the indoor humidity sensor to detect the indoor humidity.

[0144] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the controller controls to increase the operating frequency of the compressor.

[0145] The controller controls to increase the heat exchange amount of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows to the indoor through the heat exchange air outlet, thereby increasing the indoor temperature. The high temperature and high humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0146] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the controller controls to increase the operating frequency of the compressor, and controls to turn on the humidifier.

[0147] The controller controls to increase the heat exchange amount of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows to the indoor through the heat exchange air outlet, thereby increasing the indoor temperature.

[0148] When the indoor humidity is lower than the first preset humidity, the humidifier is controlled to be turned on, so that the indoor humidity is increased, and the high-humidity indoor environment can increase the release of formaldehyde in indoor furniture into the air. In combination with increasing the indoor temperature by increasing the frequency of the compressor, the high-temperature and high-humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0149] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is not changed, and the indoor heat exchanger remains in the current heating state to satisfy that the indoor temperature is not lower than the first preset temperature, and the humidifier is controlled to be turned on.

[0150] The controller controls to turn on the humidifier, so that the indoor humidity is increased, and the high-humidity indoor environment can increase the release of formaldehyde in indoor furniture into the air. In combination with the heating of the indoor heat exchanger to increase the indoor temperature, the high-temperature and high-humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0151] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operating frequency of the compressor is not changed, and the indoor heat exchanger remains in the current heating state to satisfy that the indoor temperature is not lower than the first preset temperature, so as to avoid that the change of the operating frequency of the compressor leads to high energy consumption. The operating state of the humidifier is not changed, and the heat exchange fan is controlled to operate at the upper limit value of the rated power range of the heat exchange fan.

[0152] The controller controls the humidifier to be turned on to increase the indoor humidity, and the high-humidity indoor environment can increase the release of formaldehyde in the indoor furniture into the air. The heating of the indoor heat exchanger is performed to increase the indoor temperature, and the high-temperature and high-humidity indoor environment can further promote the release of formaldehyde in the indoor furniture.

[0153] The control of the heat exchange fan to operate at the upper limit of the rated power range of the heat exchange fan can promote the indoor air flow, improve the heat exchange between the indoor air and the indoor heat exchanger, and further promote the increase of the indoor temperature, so that the indoor air is continuously heated.

[0154] As the formaldehyde concentration increases, when the formaldehyde concentration sensor detects that the increase of the indoor formaldehyde concentration in a preset time period is less than a first preset range, the current indoor formaldehyde concentration is defined as a first preset concentration, and the fresh air fan is controlled to operate at the upper limit of the rated power range of the fresh air fan.

[0155] When the formaldehyde concentration sensor detects that the increase of the indoor formaldehyde concentration in a preset time period is less than a first preset range, it is considered that the indoor formaldehyde concentration reaches an equilibrium state, which means that the formaldehyde concentration changes little in the preset time period. At this time, the fresh air fan is controlled to operate at the upper limit of the rated power range, i.e., the fresh air fan operates at the maximum speed, which can quickly reduce the indoor formaldehyde concentration, improve the formaldehyde removal efficiency, and maximize the rapid removal of indoor formaldehyde to the outside. At this time, one formaldehyde removal cycle ends.

[0156] It can be provided that when the indoor temperature sensor detects that the indoor temperature is not lower than a first preset temperature and the indoor humidity sensor detects that the indoor humidity is not lower than a first preset humidity, the controller controls the indoor and outdoor guide vanes to rotate to the minimum wind blocking position to reduce the resistance of the indoor air flowing out of the heat exchange air outlet and improve the disturbance effect of the air conditioner on the indoor air.

[0157] In the step of performing the formaldehyde removal cycle and judging whether the indoor heat exchanger works as a condenser, when the indoor heat exchanger works as an evaporator, the controller controls the indoor heat exchanger to switch to work as a condenser and controls the indoor and outdoor guide vanes to rotate to the minimum wind blocking position to reduce the resistance of the indoor air flowing out of the heat exchange air outlet and improve the disturbance effect of the air conditioner on the indoor air. At the same time, the indoor air flows through the indoor heat exchanger, and the air conditioner heats the indoor air to increase the indoor temperature to facilitate the release of formaldehyde in the indoor furniture into the air.

[0158] In the step of performing the formaldehyde removal cycle and judging whether the indoor heat exchanger works as a condenser, when the indoor heat exchanger does not work as a condenser, the controller controls the indoor heat exchanger to switch to work as a condenser, the controller controls the indoor temperature sensor to detect the indoor temperature, and the controller controls the indoor humidity sensor to detect the indoor humidity.

[0159] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the controller controls to increase the operating frequency of the compressor.

[0160] The controller increases the heat exchange amount of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows to the indoor through the heat exchange air outlet, thereby increasing the indoor temperature. The high temperature and high humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0161] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the controller controls to increase the operating frequency of the compressor, and the controller controls to turn on the humidifier.

[0162] The controller increases the heat exchange amount of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows to the indoor through the heat exchange air outlet, thereby increasing the indoor temperature.

[0163] When the indoor humidity is lower than the first preset humidity, the humidifier is turned on to increase the indoor humidity, so that the indoor humidity is increased to not be lower than the first preset humidity, and the high-humidity indoor environment can increase the release of formaldehyde in indoor furniture into the air. The compressor frequency is increased to increase the indoor temperature, and the high-temperature and high-humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0164] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the controller controls the compressor to stop operating, and the indoor heat exchanger stops operating, and simultaneously controls the humidifier to be turned on.

[0165] The controller controls the humidifier to be turned on to increase the indoor humidity, and the high-humidity indoor environment can increase the release of formaldehyde in indoor furniture into the air. At this time, the indoor temperature is higher than the first preset temperature, and the high-temperature and high-humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0166] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the indoor heat exchanger is controlled to remain in the heating state to ensure that the indoor temperature is not lower than the first preset temperature, and to avoid frequent changes in the operating frequency of the compressor, which can increase energy consumption. The heat exchange fan is controlled to operate at the upper limit value of the rated power range of the heat exchange fan.

[0167] The heat exchange fan is controlled to operate at an upper limit value of a rated power range of the heat exchange fan, so that the indoor air flow is promoted, the heat exchange between the indoor air and the indoor heat exchanger is improved, and the indoor temperature is promoted, so that the indoor air is continuously heated.

[0168] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the controller controls the formaldehyde concentration sensor to be turned on.

[0169] With the increase of the formaldehyde concentration, when the formaldehyde concentration sensor detects that the growth value of the indoor formaldehyde concentration in a preset time period is less than a first preset range, the current indoor formaldehyde concentration is defined as a first preset concentration, and the fresh air fan is controlled to operate at an upper limit value of a rated power range of the fresh air fan.

[0170] When the formaldehyde concentration sensor detects that the growth value of the indoor formaldehyde concentration in a preset time period is less than a first preset range, it is considered that the indoor formaldehyde concentration reaches an equilibrium state, which means that the formaldehyde concentration changes little in the preset time period. At this time, the fresh air fan is controlled to operate at an upper limit value of a rated power range, i.e., the fresh air fan operates at a maximum speed, so as to quickly reduce the indoor formaldehyde concentration, improve the formaldehyde removal efficiency, and maximize the rapid removal of indoor formaldehyde to the outdoor. At this time, one formaldehyde removal cycle ends.

[0171] If the human sensor detects that there is no one in the room, and the indoor heat exchanger works as a condenser to perform a formaldehyde removal cycle, if the controller receives an instruction to operate in other modes, the operation power of the heat exchange fan is controlled to be reduced, so that the heat exchange fan operates at a low speed. The operation frequency of the compressor is controlled to be reduced, so as to reduce the heating capacity of the indoor heat exchanger.

[0172] The operation power of the fresh air fan is controlled to be increased, so that the fresh air fan operates at a high speed, thereby removing the residual formaldehyde content in the room to the outdoor. The indoor heat exchanger is controlled to work as an evaporator, so that the indoor heat exchanger dehumidifies and reduces the indoor humidity.

[0173] When it is detected that the indoor formaldehyde concentration is reduced to be lower than a second preset concentration, the compressor, the heat exchange fan and the fresh air fan are controlled to stop operating.

[0174] At this time, the indoor formaldehyde concentration has been reduced to a safe range, and the indoor formaldehyde will not cause harm to the human body. Stopping the operation of the fresh air fan can reduce energy consumption. In the process of removing the indoor formaldehyde to the outdoor through the fresh air fan, the dehumidification mode is operated to gradually reduce the indoor humidity, and the compressor is controlled to stop operating to stop the dehumidification mode, thereby reducing energy consumption.

[0175] With the indoor air is discharged to the outdoor through the fresh air fan, the indoor temperature can be gradually reduced to a suitable user when the indoor formaldehyde concentration has been reduced to a safe range, and the compressor and the heat exchange fan can be stopped to reduce energy consumption.

[0176] When the aldehyde removal mode is running, the human sensor detects that the user returns home again, and the indoor state changes from no one to someone. When the user does not adjust the air conditioner to other running modes, that is, when the controller does not receive instructions to run other modes while the aldehyde removal mode is running, the controller controls the formaldehyde concentration sensor to detect the indoor formaldehyde concentration. If the indoor formaldehyde concentration is not lower than the second preset concentration at this time, the controller controls the compressor to reduce the operating frequency, controls the humidifier to stop running, controls the heat exchange fan to run at the upper limit value of the rated power range of the heat exchange fan, and controls the fresh air fan to run at the upper limit value of the rated power range of the fresh air fan.

[0177] The controller controls the compressor to reduce the operating frequency, so that the compressor runs at the first power of the compressor, which can be set to 50% of the upper limit value of the rated power of the compressor. The humidifier is controlled to stop running. Because in the aldehyde removal mode, the indoor temperature is raised and the indoor humidity is set to promote the rapid release of formaldehyde. The temperature and humidity corresponding to the fastest release efficiency of formaldehyde are not the optimal temperature and humidity state for human comfort, so the heat exchange amount needs to be appropriately reduced to lower the indoor temperature, and the humidifier is turned off to quickly reduce the indoor humidity and prevent the high temperature and high humidity environment from causing discomfort to the human body.

[0178] The controller controls the heat exchange fan to run at the upper limit value of the rated power range of the heat exchange fan, and controls the fresh air fan to run at the upper limit value of the rated power range of the fresh air fan, so that the rotational speed of the heat exchange fan and the rotational speed of the fresh air fan remain unchanged at the maximum rotational speed, and the inner and outer air deflectors are switched to the air-avoiding position, so that the indoor formaldehyde concentration is quickly reduced to below the second preset concentration to avoid harm to the user in the room caused by the indoor formaldehyde.

[0179] When the indoor formaldehyde concentration is lower than the second preset concentration, the operating power of the heat exchange fan and the fresh air fan is reduced, thereby saving energy consumption when the indoor unit of the air conditioner is running.

[0180] When the air conditioner runs the aldehyde removal mode, the other mode refers to at least the heating mode, and any one of the aldehyde removal mode and the dehumidification mode.

[0181] When the formaldehyde removal mode is running, the human sensor detects that the user returns home again, the indoor state changes from no one to someone, and the user adjusts the air conditioner to other running modes. When the controller receives the instruction to run other modes, the compressor frequency is controlled to be reduced, the controller controls the heat exchange fan to run at a first power lower than the upper limit of the rated power of the heat exchange fan, controls the fresh air fan to run at a second power lower than the upper limit of the rated power of the fresh air fan, controls the indoor heat exchanger to work as an evaporator, and makes the indoor heat exchanger dehumidify.

[0182] The compressor frequency is controlled to be reduced to reduce the heat exchange capacity of the indoor heat exchanger, the controller controls the heat exchange fan to run at a first power lower than the upper limit of the rated power of the heat exchange fan, and the energy consumption of the air conditioner indoor unit is saved.

[0183] The fresh air fan is controlled to run at a second power lower than the upper limit of the rated power of the fresh air fan, and the fresh air fan is switched to run at the second power at a medium speed, so as to prevent a large amount of outdoor air from being quickly introduced to cause a large impact on the indoor space heat load and cause the human body to be uncomfortable.

[0184] At the same time, the controller controls the dehumidification mode to run, controls the indoor heat exchanger to work as an evaporator, and makes the indoor heat exchanger dehumidify, so as to adjust the indoor humidity to a humidity value corresponding to the user-set temperature, wherein the controller internally integrates preset humidity values corresponding to optimal comfort degrees at different temperatures.

[0185] When the indoor formaldehyde concentration decreases to be lower than the second preset concentration, the fresh air fan is controlled to stop running, the fresh air fan is turned off, and the dehumidification mode is controlled to stop. At this time, the indoor formaldehyde concentration decreases to a safe value and does not cause harm to the user, and the fresh air fan is turned off to save the energy consumption of the air conditioner indoor unit.

[0186] The controller controls the working mode of the indoor heat exchanger to be switched to a windless mode, the working state of the indoor heat exchanger remains unchanged in the windless mode, the heat exchange fan is switched to run at a first power lower than the upper limit of the rated power of the heat exchange fan, the heat exchange fan runs at a low speed, the inner and outer air deflectors are switched to the maximum air blocking position, direct blowing to the user is avoided, and discomfort to the user is avoided.

[0187] It can be set that when the indoor formaldehyde concentration is not lower than the second preset concentration, the instruction from the user is shielded and does not have any effect, until the indoor formaldehyde concentration is lower than the second preset concentration, the controller responds to the user instruction. It should be noted that when the indoor formaldehyde concentration is not lower than the second preset concentration, if the user performs an interference operation, there will be a corresponding reminder, including a voice reminder or a software prompt of intelligent interconnection, and the user can perform the operation when the indoor formaldehyde concentration is lower than the second preset concentration.

[0188] In some embodiments, when the indoor unit of the air conditioner is provided with an aldehyde removal module, if the human sensor detects that there is no one in the room, and the indoor heat exchanger works as a condenser to perform an aldehyde removal cycle, if the controller receives an instruction to run other modes, the controller controls to close the aldehyde removal module, so that the aldehyde removal module does not contact with the indoor air, thereby prolonging the service life of the aldehyde removal module. The controller controls to reduce the operating power of the heat exchanger fan, so that the heat exchanger fan runs at a low speed. The controller controls to reduce the operating frequency of the compressor, thereby reducing the heating capacity of the indoor heat exchanger.

[0189] The controller controls to increase the operating power of the fresh air fan, so that the fresh air fan keeps running at a high speed, thereby discharging the residual formaldehyde content in the room to the outdoor. The controller controls the indoor heat exchanger to work as an evaporator, so that the indoor heat exchanger dehumidifies and reduces the indoor humidity.

[0190] When it is detected that the indoor formaldehyde concentration is reduced to be lower than the second preset concentration, the controller controls the compressor, the heat exchanger fan and the fresh air fan to stop running.

[0191] At this time, the indoor formaldehyde concentration has been reduced to a safe range, and the indoor formaldehyde will not harm the human body. Stopping the fresh air fan can reduce energy consumption. In the process of discharging the indoor formaldehyde to the outdoor through the fresh air fan, running the dehumidification mode makes the indoor humidity gradually decrease. Stopping the compressor to stop the dehumidification mode can reduce energy consumption.

[0192] With the indoor air being discharged to the outdoor through the fresh air fan, the indoor temperature gradually decreases to a suitable temperature for the user when the indoor formaldehyde concentration has been reduced to a safe range. Stopping the compressor and the heat exchanger fan can reduce energy consumption.

[0193] When the aldehyde removal mode is running, the human sensor detects that the user returns home again, and the indoor state changes from no one to someone. If the user does not adjust the air conditioner to other running modes, that is, the controller does not receive an instruction to run other modes when the aldehyde removal mode is running, the controller controls the formaldehyde concentration sensor to detect the indoor formaldehyde concentration. If the indoor formaldehyde concentration is not lower than the second preset concentration at this time, the controller controls to open the aldehyde removal module, so that the indoor air contacts with the aldehyde removal module to purify the formaldehyde in the indoor air. The controller controls to reduce the operating frequency of the compressor, controls the humidifier to stop running, controls the heat exchanger fan to run at the upper limit value of the rated power range of the heat exchanger fan, and controls the fresh air fan to run at the upper limit value of the rated power range of the fresh air fan.

[0194] The controller controls the compressor to reduce the operating frequency of the compressor, so that the compressor operates at a second power of the compressor, which can be set to 80% of the upper limit value of the rated power of the compressor. The humidifier is controlled to stop operating. Because in the formaldehyde removal mode, the indoor temperature is raised and the indoor humidity is set to promote the rapid release of formaldehyde. The temperature and humidity corresponding to the fastest release efficiency of formaldehyde are not the optimal temperature and humidity conditions for human comfort, so the heat exchange capacity needs to be appropriately reduced to lower the indoor temperature, and the humidifier is turned off to quickly lower the indoor humidity to prevent the high temperature and high humidity environment in the room from causing discomfort to the human body.

[0195] The controller controls the heat exchange fan to operate at an upper limit value of the rated power range of the heat exchange fan, and controls the fresh air fan to operate at an upper limit value of the rated power range of the fresh air fan, so that the rotation speed of the heat exchange fan and the rotation speed of the fresh air fan remain unchanged at the maximum rotation speed, and the inner and outer guide vanes are switched to the wind-avoiding position, so that the indoor formaldehyde concentration is quickly reduced to below the second preset concentration, thereby avoiding the harm of indoor formaldehyde to the users in the room.

[0196] When the indoor formaldehyde concentration is lower than the second preset concentration, the operating power of the heat exchange fan and the fresh air fan is reduced, thereby saving the energy consumption of the air conditioner indoor unit during operation.

[0197] When the air conditioner operates in the formaldehyde removal mode, the other mode refers to at least the heating mode, and any one of the formaldehyde removal mode and the dehumidification mode.

[0198] When the formaldehyde removal mode is operating, the human sensing sensor detects that the user returns home again, and the indoor state changes from no one to someone. When the user adjusts the air conditioner to operate in other modes, that is, when the controller receives an instruction to operate in other modes while the formaldehyde removal mode is operating. The frequency of the compressor is controlled to be reduced, the controller controls the heat exchange fan to operate at a first power lower than the upper limit value of the rated power of the heat exchange fan, controls the fresh air fan to operate at a second power lower than the upper limit value of the rated power of the fresh air fan, and controls the indoor heat exchanger to work as an evaporator, so that the indoor heat exchanger dehumidifies.

[0199] The frequency of the compressor is controlled to be reduced to reduce the heat exchange capacity of the indoor heat exchanger, and the controller controls the heat exchange fan to operate at a first power lower than the upper limit value of the rated power of the heat exchange fan, thereby saving the energy consumption of the air conditioner indoor unit.

[0200] The fresh air fan is controlled to operate at a second power lower than the upper limit value of the rated power of the fresh air fan, and the fresh air fan is switched to operate at the second power at a medium speed, so as to prevent the rapid introduction of a large amount of outdoor air from causing a large impact on the indoor space heat load and causing the human body to be uncomfortable.

[0201] Meanwhile, the controller controls the operation of the dehumidification mode, controls the indoor heat exchanger to work as an evaporator, and makes the indoor heat exchanger dehumidify, so as to adjust the indoor humidity to the humidity value corresponding to the user-set temperature.

[0202] When the indoor formaldehyde concentration is reduced to be lower than the second preset concentration, the fresh air fan is controlled to stop running, the fresh air fan is turned off, and the dehumidification mode is controlled to stop. At this time, the indoor formaldehyde concentration is reduced to a safe value and does not harm the user, and turning off the fresh air fan can save the energy consumption of the air conditioner indoor unit.

[0203] The controller controls the indoor heat exchanger to switch the working mode to the windless mode, the working state of the indoor heat exchanger remains unchanged in the windless mode, the heat exchange fan is switched to run at a first power which is lower than the upper limit of the rated power of the heat exchange fan, so that the heat exchange fan runs at a low speed, and the inner and outer air deflectors are switched to the maximum air blocking position to avoid directly blowing on the user and causing discomfort to the user.

[0204] It can be set that when the indoor formaldehyde concentration is not lower than the second preset concentration, the instruction from the user is shielded and does not have any effect, until the indoor formaldehyde concentration is lower than the second preset concentration, the controller responds to the user instruction. It should be noted that when the indoor formaldehyde concentration is not lower than the second preset concentration, if the user performs an interference operation, there will be a corresponding reminder, including voice reminder or software prompt of intelligent interconnection, and the user can perform the operation only when the indoor formaldehyde concentration is lower than the second preset concentration.

[0205] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. An air conditioner characterized by comprising: It comprises: An air conditioner indoor unit and an air conditioner outdoor unit; The air conditioner indoor unit comprises: A shell with a heat exchange air outlet; An indoor heat exchanger arranged inside the shell, which exchanges heat between the flowing refrigerant inside and indoor air to form a heating cycle or a refrigeration cycle, and the indoor air flows to the outside of the shell through the heat exchange air outlet after heat exchange; A heat exchange fan for driving indoor air to be delivered to the indoor unit through the heat exchange air outlet; A humidifier arranged in the shell, which is used to generate steam, and the steam flows to the outside of the shell through the heat exchange air outlet; A human sensor for detecting whether there is a person in the room; An indoor temperature sensor for detecting the indoor temperature; An indoor humidity sensor for detecting the indoor humidity; A formaldehyde concentration sensor for detecting the indoor formaldehyde concentration; A fresh air fan for delivering outdoor fresh air to the indoor unit; The air conditioner outdoor unit comprises at least a compressor, which is connected to the indoor heat exchanger through a refrigerant circuit; The controller is configured to: When the indoor heat exchanger works as a condenser, and the indoor state changes from no one to someone is detected by the human sensor; When the controller does not receive an instruction to run other modes, and the indoor formaldehyde concentration is not lower than the second preset concentration, control the operating frequency of the compressor to be reduced, control the humidifier to stop running, control the heat exchange fan to run at the upper limit value of the rated power range of the heat exchange fan, and control the fresh air fan to run at the upper limit value of the rated power range of the fresh air fan; When the indoor formaldehyde concentration is lower than the second preset concentration, control the operating power of the heat exchange fan and the fresh air fan to be reduced; When the indoor heat exchanger works as a condenser, and the indoor temperature is not lower than the first preset temperature, and the indoor humidity is not lower than the first preset humidity, control the formaldehyde concentration sensor to be turned on; When the formaldehyde concentration sensor detects that the growth value of the indoor formaldehyde concentration in a preset time period is less than the first preset range, control the fresh air fan to run at the upper limit value of the rated power range of the fresh air fan; When the human sensor detects that there is no one in the room, and the indoor heat exchanger works as a condenser, control the operating power of the heat exchange fan to be reduced, control the operating power of the fresh air fan to be increased, control the indoor heat exchanger to work as an evaporator, and control the indoor heat exchanger to dehumidify, and when the indoor formaldehyde concentration is detected to be lower than the second preset concentration, control the compressor, the heat exchange fan and the fresh air fan to stop running.

2. The air conditioner of claim 1, wherein the controller is configured to: When the indoor heat exchanger works as a condenser, control the indoor temperature sensor to detect the indoor temperature, and control the indoor humidity sensor to detect the indoor humidity; When the indoor temperature is lower than the first preset temperature, and the indoor humidity is not lower than the first preset humidity, control the operating frequency of the compressor to be increased.

3. The air conditioner of claim 1, wherein the controller is configured to: ​ The controller is configured to: detect indoor temperature by the indoor temperature sensor and detect indoor humidity by the indoor humidity sensor when the indoor heat exchanger works as a condenser; increase the operating frequency of the compressor and turn on the humidifier when the indoor temperature is lower than the first preset temperature and the indoor humidity is lower than the first preset humidity.

4. The air conditioner of claim 1, wherein the controller is configured to: detect indoor temperature by the indoor temperature sensor and detect indoor humidity by the indoor humidity sensor when the indoor heat exchanger works as a condenser; keep the operating frequency of the compressor unchanged and turn on the humidifier when the indoor temperature is not lower than the first preset temperature and the indoor humidity is lower than the first preset humidity.

5. The air conditioner of claim 1, wherein the controller is configured to: detect indoor temperature by the indoor temperature sensor and detect indoor humidity by the indoor humidity sensor when the indoor heat exchanger works as a condenser; keep the operating frequency of the compressor unchanged, keep the operating state of the humidifier unchanged, and control the heat exchange fan to operate at an upper limit value of a rated power range of the heat exchange fan when the indoor temperature is not lower than the first preset temperature and the indoor humidity is not lower than the first preset humidity.

6. The air conditioner of claim 1, wherein the controller is configured to: control the heat exchange fan to operate at a first power lower than an upper limit value of a rated power of the heat exchange fan, control the fresh air fan to operate at a second power lower than an upper limit value of a rated power of the fresh air fan, and control the indoor heat exchanger to work as an evaporator when the indoor heat exchanger works as a condenser and the human presence sensor detects that there is a person in the room, so that the indoor heat exchanger dehumidifies.

7. The air conditioner of claim 6, wherein 8. An air conditioner characterized by comprising: the controller is configured to control the fresh air fan to stop operating when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than a second preset concentration. It comprises: an air conditioner indoor unit and an air conditioner outdoor unit; the air conditioner indoor unit comprises: a shell having a heat exchange air outlet; an indoor heat exchanger arranged inside the shell, which exchanges heat between the refrigerant flowing inside and indoor air to form a heating cycle or a refrigeration cycle, and the indoor air flows to the outside of the shell after heat exchange through the heat exchange air outlet; a heat exchange fan for driving indoor air to be transported to the room through the heat exchange air outlet; a humidifier arranged in the shell, which is used to generate steam, and the steam flows to the outside of the shell through the heat exchange air outlet; an aldehyde removal module for removing formaldehyde in the air flowing through the aldehyde removal module; a human presence sensor for detecting whether there is a person in the room; an indoor temperature sensor for detecting indoor temperature; an indoor humidity sensor for detecting indoor humidity; a formaldehyde concentration sensor for detecting indoor formaldehyde concentration; a fresh air fan for transporting outdoor fresh air to the room; The air conditioner outdoor unit at least comprises a compressor, and the compressor is communicated with the indoor heat exchanger through a refrigerant circuit; The controller is configured to: The indoor heat exchanger works as a condenser, and the indoor state is detected by the human sensing sensor to change from an unoccupied state to an occupied state; When the controller does not receive an instruction to run other modes, and the indoor formaldehyde concentration is not lower than the second preset concentration, the de-aldehyde module is controlled to be turned on, the operating frequency of the compressor is controlled to be reduced, the humidifier is controlled to stop running, the heat exchanger fan is controlled to run at an upper limit value of a rated power range of the heat exchanger fan, and the fresh air fan is controlled to run at an upper limit value of a rated power range of the fresh air fan; When the indoor formaldehyde concentration is lower than the second preset concentration, the operating power of the heat exchanger fan and the fresh air fan is controlled to be reduced; When the indoor heat exchanger works as a condenser, and the indoor temperature is detected to be not lower than the first preset temperature, and the indoor humidity is detected to be not lower than the first preset humidity, the formaldehyde concentration sensor is controlled to be turned on; When the formaldehyde concentration sensor detects that the growth value of the indoor formaldehyde concentration in a preset time period is less than a first preset range, the fresh air fan is controlled to run at an upper limit value of a rated power range of the fresh air fan; When the human sensing sensor detects that the indoor is unoccupied, and the indoor heat exchanger works as a condenser, the operating power of the heat exchanger fan is controlled to be reduced, the operating power of the fresh air fan is controlled to be increased, the indoor heat exchanger is controlled to work as an evaporator, the indoor heat exchanger is dehumidified, and when the indoor formaldehyde concentration is detected to be lower than the second preset concentration, the compressor, the heat exchanger fan and the fresh air fan are controlled to stop running.

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