Air conditioner

Abstract

The present application relates to an air conditioner, comprising an air conditioner indoor unit, comprising: a shell; an indoor heat exchanger; a heat exchanger fan; a humidifier; a human sensor; an indoor temperature sensor; an indoor humidity sensor; a fresh air fan; a controller is configured to: detect that the indoor is a person state through the human sensor, define the indoor temperature of the current air conditioner indoor unit setting as a first temperature when the indoor heat exchanger works as a condenser, the first humidity corresponding to the first temperature is set in the controller; when the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the controller controls the humidifier to keep the current operating state unchanged, and the fresh air fan is controlled to run in the forward direction at a first power lower than the upper limit value of the rated power range of the fresh air fan; when the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to run at a second power lower than the upper limit value of the rated power range of the humidifier, so as to avoid causing user discomfort and improve 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, more and more users begin to find reliable and effective ways to remove formaldehyde. As a class I carcinogen, formaldehyde mainly exists in two forms in the room. The formaldehyde in the furniture board is combined formaldehyde, and the formaldehyde in the indoor air is free formaldehyde. The combined formaldehyde in the furniture board will gradually release to the air at room temperature, continuously increasing the content of free formaldehyde in the air and intensifying the threat to human health. There is no mature technology that can completely remove the formaldehyde contained in the furniture board in a short time.

[0003] The air conditioner usually includes 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. The shell is provided with a heat exchange air outlet. 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. The indoor air flows to the outside of the shell through the heat exchange air outlet after heat exchange. The formaldehyde removal filter screen is used to adsorb formaldehyde in the indoor air. 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 the humidifier in combination with the indoor heat exchanger to remove formaldehyde.

[0006] Some air conditioner indoor units also include a fresh air fan. The fresh air fan can introduce fresh air into the room in forward rotation or send indoor air to the outside in reverse rotation, but it does not disclose the influence of fresh air forward rotation and reverse rotation on indoor users and formaldehyde removal effect.

[0007] In related technologies, indoor air flows through the formaldehyde removal filter screen to remove formaldehyde gas in the indoor air. However, the current air conditioner indoor unit removes formaldehyde in a single way, with low formaldehyde removal efficiency, and the formaldehyde removal filter screen needs to be replaced frequently. It cannot implement different formaldehyde removal methods according to whether there is a person in the room and different indoor formaldehyde concentrations. SUMMARY

[0008] The present application at least partly solves one of the problems in the related art.

[0009] To this end, the application aims to provide an air conditioner to implement corresponding formaldehyde removal modes according to whether there is a person in the room and different indoor formaldehyde concentrations, so as to avoid causing user discomfort and ensure that the formaldehyde removal effect and the energy consumption of the air conditioner are optimal.

[0010] To achieve the above-mentioned purpose, the application provides an air conditioner, which comprises:

[0011] An air conditioner indoor unit, which comprises:

[0012] A shell, which is provided with a heat exchange air outlet;

[0013] 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;

[0014] A heat exchange fan, which is used to drive the indoor air to be transported to the indoor through the heat exchange air outlet;

[0015] A humidifier, which is arranged in the shell and is used to generate steam to flow to the outside of the shell;

[0016] A human sensor, which is used to detect whether there is a person in the room;

[0017] An indoor temperature sensor, which is used to detect the indoor temperature;

[0018] An indoor humidity sensor, which is used to detect the indoor humidity;

[0019] A fresh air fan, which is arranged in the shell, and when the fresh air fan is forward rotated, it drives outdoor air to enter the indoor through the fresh air fan, and when the fresh air fan is reversely rotated, it drives indoor air to be discharged to the outdoor through the fresh air fan;

[0020] The controller is configured to: when the human sensor detects that the indoor is in a person state, define the indoor temperature set by the current air conditioner indoor unit as a first temperature when the indoor heat exchanger works as a condenser, and the first humidity corresponding to the first temperature is set in the controller;

[0021] When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to remain in the current operating state, and the fresh air fan is controlled to be forward rotated at a first power lower than the upper limit value of the rated power range of the fresh air fan;

[0022] When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to be operated at a second power lower than the upper limit value of the rated power range of the humidifier.

[0023] When the indoor humidity is not less than the first humidity, it indicates that the indoor humidity has reached the optimal humidity suitable for the release of formaldehyde in furniture and home decoration, the controller controls the humidifier to keep the current operation state unchanged, the indoor environment can be kept in a high humidity environment, the high humidity indoor environment can improve the release of formaldehyde in indoor furniture into the air, and meanwhile prevents the user from being uncomfortable caused by temperature rise.

[0024] When the indoor humidity is less than the first humidity, it indicates that the indoor humidity has not reached the optimal humidity suitable for the release of formaldehyde in furniture and home decoration, the controller controls the humidifier to operate at a second power lower than the upper limit of the rated power range of the humidifier, so as to make the indoor humidity rise to the first humidity, the indoor humidity is improved to improve the release of formaldehyde in indoor furniture and home decoration into the air, and meanwhile the temperature is controlled to maintain the first temperature to prevent the user from being uncomfortable caused by temperature rise.

[0025] In some embodiments of the present application, further comprising:

[0026] A formaldehyde concentration sensor is configured to detect the indoor formaldehyde concentration.

[0027] The air conditioner outdoor unit at least comprises a compressor, and the compressor and the indoor heat exchanger are connected in communication through a refrigerant circuit.

[0028] The controller is configured to:

[0029] When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is less than the second preset concentration, the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and the heat exchange fan are controlled to keep the current operation state unchanged.

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

[0031] When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not less than the second preset concentration, the fresh air fan, the humidifier, the compressor and the heat exchange fan are controlled to keep the current state running for a first preset time, then the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and the heat exchange fan are controlled to keep the current operation state unchanged.

[0032] In some embodiments of the present application, the controller is configured to:

[0033] When the people sensing sensor detects that the indoor is in an unoccupied state and the indoor heat exchanger works as a condenser;

[0034] 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 less than the first preset humidity, the operation frequency of the compressor is controlled to be increased.

[0035] In some embodiments of the application, the controller is configured to:

[0036] when the human presence sensor detects that the indoor is unoccupied, and the indoor heat exchanger works as a condenser;

[0037] 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.

[0038] In some embodiments of the application, the controller is configured to:

[0039] when the human presence sensor detects that the indoor is unoccupied, and the indoor heat exchanger works as a condenser;

[0040] 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 operating frequency of the compressor to be unchanged, and controls to turn on the humidifier.

[0041] In some embodiments of the application, the controller is configured to:

[0042] when the human presence sensor detects that the indoor is unoccupied, and the indoor heat exchanger works as a condenser;

[0043] 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 operating frequency of the compressor to be unchanged, controls the operating state of the humidifier to be unchanged, and controls the heat exchanger fan to operate at the upper limit value of the rated power range of the heat exchanger fan.

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

[0045] when the human presence sensor detects that the indoor is unoccupied, 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;

[0046] the controller controls the operating frequency of the compressor to be unchanged, and controls the operating state of the humidifier and the heat exchanger fan to be unchanged;

[0047] after the second preset time, the controller controls the fresh air fan to operate reversely at the upper limit value of the rated power range of the fresh air fan.

[0048] In some embodiments of the application, after the second preset time, the controller controls the fresh air fan to operate reversely at the upper limit value of the rated power range of the fresh air fan for a third preset time, and then controls the formaldehyde concentration sensor to detect the indoor formaldehyde concentration.

[0049] When it is detected that the indoor formaldehyde concentration is lower than the second preset concentration, the fresh air fan and the humidifier are controlled to stop running, and the compressor and the heat exchange fan are controlled to keep the current running state unchanged.

[0050] The application further provides an air conditioner, comprising:

[0051] The air conditioner indoor unit comprises:

[0052] The shell is provided with a heat exchange air outlet;

[0053] The indoor heat exchanger is arranged inside the shell, and heat exchange is performed between the refrigerant flowing inside the indoor heat exchanger 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;

[0054] The heat exchange fan is used to drive the indoor air to be transported to the indoor unit through the heat exchange air outlet;

[0055] The humidifier is arranged in the shell, and the humidifier is used to generate steam to flow to the outside of the shell;

[0056] The formaldehyde removal module is used to remove formaldehyde in air flowing through the formaldehyde removal module;

[0057] The human sensor is used to detect whether there is a person in the indoor unit;

[0058] The indoor temperature sensor is used to detect the indoor temperature;

[0059] The indoor humidity sensor is used to detect the indoor humidity;

[0060] The fresh air fan is arranged in the shell, when the fresh air fan is rotated in a forward direction, the fresh air fan drives outdoor air to enter the indoor unit through the fresh air fan, and when the fresh air fan is rotated in a reverse direction, the fresh air fan drives indoor air to be discharged to the outdoor unit through the fresh air fan;

[0061] The controller is configured to:

[0062] When the human sensor detects that the indoor unit is in a person state, the formaldehyde removal module is controlled to be turned on so that the indoor air flows through the formaldehyde removal module;

[0063] When the indoor heat exchanger works as a condenser, the indoor temperature set by the current air conditioner indoor unit is defined as a first temperature, and a first humidity corresponding to the first temperature is set in the controller;

[0064] When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to keep the current running state unchanged, and the fresh air fan is controlled to be rotated in the forward direction at a first power lower than an upper limit value of a rated power range of the fresh air fan;

[0065] When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to operate at a second power lower than an upper limit value of a rated power range of the humidifier.

[0066] Additional aspects and advantages of the present application will be set forth in part in the following description, will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0067] Figure 1 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application;

[0068] 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 ;

[0069] 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 ;

[0070] Figure 4 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 ;

[0071] Figure 5 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 ;

[0072] Figure 6 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 Three ;

[0073] Figure 7 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 Four ;

[0074] Figure 8 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 Five ;

[0075] Figure 9 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 ;

[0076] Figure 10 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 ;

[0077] Figure 11 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Three ;

[0078] Figure 12 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Four ;

[0079] Figure 13 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Five ;

[0080] Figure 14 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Six ;

[0081] Figure 15 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Seven ;

[0082] Figure 16 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Eight ;

[0083] Figure 17 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Nine ;

[0084] Figure 18 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Ten ;

[0085] Figure 19 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Ten ;

[0086] Figure 20 is the working flow of the air conditioner indoor unit according to one of the embodiments of the present application when detecting that the room is empty Figure Ten ;

[0087] In the above figures: housing 100; air conditioner outdoor unit 200. DETAILED DESCRIPTION

[0088] In the description of the application, it is to be understood that the orientations or positional relationships 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 orientations or positional relationships shown in the drawings, and are only for the convenience of describing the 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 limiting the application.

[0089] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connected", "connection", "fixed", and the like are to be broadly understood, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically 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.

[0090] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0091] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0092] The present application will now be described in detail by way of example with reference to the accompanying drawings. It is to be understood that the elements, structures and features in the drawings are not necessarily drawn to scale. Furthermore, it is to be understood that the elements, structures and features in one embodiment can be incorporated into other embodiments.

[0093] 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.

[0094] 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 an endothermic process of the refrigerant, and achieves temperature adjustment of the indoor space.

[0095] The compressor compresses 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.

[0096] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state, which is condensed in the outdoor heat exchanger, into low-pressure liquid-phase refrigerant.

[0097] The indoor heat exchanger evaporates the refrigerant expanded in the expansion valve, and returns refrigerant gas in a low-temperature and low-pressure state to the compressor. The indoor heat exchanger can achieve a refrigeration effect by heat-exchanging with indoor air using latent heat of evaporation of the refrigerant.

[0098] In the entire cooling cycle, the air conditioner indoor unit can adjust the temperature of the indoor space.

[0099] When the air conditioner operates in a heating mode, the air conditioner performs a heating cycle of the air conditioner indoor unit by using a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

[0100] 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 an indoor space through an exothermic process of the refrigerant, and achieves temperature adjustment of the indoor space.

[0101] When the heating cycle is operated, the compressor compresses 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 heat-exchanged with indoor air flowing through the indoor heat exchanger, thereby increasing the indoor temperature.

[0102] 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.

[0103] 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 perform heat exchange with outdoor air by using latent heat of evaporation of the refrigerant.

[0104] The air conditioning indoor unit can adjust the temperature of the indoor space throughout the heating cycle.

[0105] 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.

[0106] The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger serves as a condenser, the air conditioning indoor unit serves as a heater in a heating mode, and when the indoor heat exchanger serves as an indoor heat exchanger, the air conditioning indoor unit serves as a cooler in a cooling mode.

[0107] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0108] As shown in the accompanying Figures 1 to 20 As shown in the accompanying

[0109] The air conditioner includes an air conditioning indoor unit and an air conditioning outdoor unit 200, the air conditioning outdoor unit 200 includes a compressor and an outdoor heat exchanger, the air conditioning indoor unit includes an indoor heat exchanger, and the expansion valve can be provided in the air conditioning indoor unit or the air conditioning outdoor unit 200.

[0110] The air conditioner of the present application includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a pipe through which a refrigerant flows, the indoor heat exchanger and the outdoor heat exchanger are connected to the compressor. The expansion valve is an electronic expansion valve, the electronic expansion valve is connected between the indoor heat exchanger and the outdoor heat exchanger, and can expand liquid refrigerant that has undergone a condensation process into low-pressure liquid refrigerant.

[0111] The compressor includes a suction port and a discharge port, the refrigerant that has undergone an evaporation process by absorbing heat enters the compressor from the suction port, and the compressor compresses the gaseous refrigerant into a high-temperature and high-pressure state and discharges it from the discharge port.

[0112] The indoor heat exchanger and the outdoor heat exchanger are connected through a four-way valve and the compressor in a refrigerant circuit, respectively, and the four-way valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port. Among them, the suction port of the compressor is fixedly connected to the first valve port, and the discharge port of the compressor is fixedly connected to the third valve port.

[0113] In the refrigerant circuit, the refrigerant can sequentially circulate through the compressor, the indoor heat exchanger, the expansion valve, and the outdoor heat exchanger.

[0114] 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.

[0115] In some embodiments, the air conditioner indoor unit comprises a housing 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.

[0116] The housing 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 housing 100.

[0117] The housing 100 is provided with an indoor air inlet, an outdoor air inlet, a heat exchange air outlet, and a fresh air outlet.

[0118] The indoor heat exchanger is arranged inside the housing 100, and the refrigerant flowing inside the indoor heat exchanger exchanges heat with the indoor air to form a heating cycle or a cooling cycle. The indoor air flows to the outside of the housing 100 through the heat exchange air outlet after flowing through the indoor heat exchanger.

[0119] The heat exchange fan can be a cross-flow fan. When the heat exchange fan is started, the indoor air is introduced into the housing 100 by the driving of the heat exchange fan. The heat exchange fan is used to provide power for the indoor air to flow from the indoor air inlet to the heat exchange air outlet through the inside of the housing 100. The heat exchange fan comprises a heat exchange fan and a heat exchange driving motor, and the heat exchange driving motor drives the heat exchange fan to rotate.

[0120] The indoor air enters the housing 100 through the indoor air inlet, exchanges heat with the heat exchanger, and then flows out of the heat exchange air outlet on the housing 100 to the indoor space, thereby achieving the supply of indoor air.

[0121] 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 air outlet under the driving of the heat exchange fan. Alternatively, the steam can also flow to the outside of the housing through the fresh air outlet under the driving of the fresh air fan.

[0122] The fresh air module is arranged in a space in the shell 100 of the air conditioner indoor unit. The fresh air module includes a fresh air fan shell. The fresh air fan shell is provided with a fresh air inlet and a fresh air outlet. The fresh air inlet is in communication with the outdoor air inlet on the shell 100. 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 on 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 on the top, front side, rear side, left side or right side of the shell 100.

[0123] The fresh air outlet can be arranged around the air outlet of the shell 100 to mix the fresh air from the fresh air outlet with the air conditioner air from the heat exchange outlet, so as to reduce the influence of the fresh air on the temperature and humidity of the indoor environment and improve the comfort of the user when using the fresh air module. The fresh air outlet can also be arranged on the top, front side, rear side, left side or right side of the shell 100.

[0124] 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, the outdoor air is introduced into the indoor through the fresh air module. 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. The driving motor drives the fan to rotate.

[0125] The fresh air fan shell is further provided with an exhaust outlet in communication with the indoor. The fresh air fan shell is provided with a baffle. The baffle is used to rotate to close the fresh air outlet or the exhaust outlet.

[0126] When the fresh air fan rotates forward, the baffle rotates to close the exhaust outlet and open the fresh air outlet. The outdoor air enters the fresh air fan shell through the fresh air inlet under the driving of the fresh air fan and is discharged to the indoor through the fresh air outlet.

[0127] When the fresh air fan reverses, the baffle rotates to close the fresh air outlet and open the exhaust outlet. The indoor air enters the fresh air fan shell through the exhaust outlet under the driving of the fresh air fan and is discharged to the outdoor through the fresh air inlet.

[0128] The fresh air module further includes a fresh air pipe in communication with the indoor and outdoor. The fresh air pipe is arranged in the outdoor air inlet.

[0129] In some embodiments, the fresh air pipe is arranged in the air pipe mounting hole formed in the wall. One end of the fresh air pipe faces the indoor and is connected with the fresh air inlet of the fresh air module. The other end of the fresh air pipe faces the outdoor and is provided with an air inlet. The fresh air pipe is in communication with the outdoor through the air inlet. Under the action of the fresh air fan, the outdoor fresh air enters the fresh air module from the outdoor along the fresh air pipe and is blown to the indoor from the fresh air outlet, so as to introduce the outdoor fresh air into the indoor.

[0130] The indoor temperature sensor is arranged at the indoor air inlet, and is configured to detect the indoor temperature.

[0131] In some embodiments, the indoor temperature sensor and the indoor humidity sensor can be integrated into a temperature and humidity sensor.

[0132] The formaldehyde concentration sensor is arranged at the heat exchange air outlet, and is configured to detect the indoor formaldehyde concentration.

[0133] The human sensor is arranged on the housing 100, and is configured to detect whether there is a person in the room. The human sensor can be an infrared human sensor.

[0134] 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 air outlet and located inside the housing 100. The outer air deflector is arranged at the heat exchange air outlet of the air conditioner indoor unit, and the heat exchange air outlet is in communication with the indoor air inlet. Under the drive of the heat exchange fan, the indoor air enters the housing 100 through the indoor air inlet, flows through the indoor heat exchanger, and is discharged into the indoor space through the heat exchange air outlet.

[0135] 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.

[0136] 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.

[0137] Referring to Figures 4-8 In some embodiments, when the controller receives a command to start the formaldehyde removal mode, the controller controls the indoor temperature sensor and the indoor humidity sensor to detect the indoor temperature and the indoor humidity in real time, and controls the formaldehyde concentration sensor to detect the change of the indoor formaldehyde concentration in real time. Then, a formaldehyde removal cycle is performed.

[0138] When the formaldehyde removal mode is started, the controller controls the air conditioner to run multiple formaldehyde removal cycles, thereby improving the formaldehyde removal efficiency.

[0139] A formaldehyde removal cycle includes: when the formaldehyde removal mode is started, if the human sensor detects that there is a person in the room, and if the indoor heat exchanger of the air conditioner indoor unit works as an evaporator at this time, the controller controls the air conditioner to issue a reminder, thereby reminding the user that the formaldehyde removal mode needs to be started in the heating mode. It can also be understood that the user is reminded that the formaldehyde removal mode needs to be started when the indoor heat exchanger works as a condenser.

[0140] When the de-aldehyde mode is started, if the air conditioner indoor unit is working as a condenser when the human sensor detects that there is a person in the room, the indoor temperature set by the current air conditioner indoor unit is defined as a first temperature, and a first humidity corresponding to the first temperature is set in the controller. At this time, the de-aldehyde mode control command of the indoor temperature of the air conditioner is inhibited, and the controller controls the air conditioner to run at the highest priority of the indoor temperature set by the user.

[0141] At the same time, the controller controls to judge whether the current indoor humidity is lower than the first humidity.

[0142] When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to keep the current running state unchanged, and the fresh air fan is controlled to run at a first power which is lower than the upper limit of the rated power range of the fresh air fan.

[0143] When the indoor humidity is not lower than the first humidity, it means that the indoor humidity has reached the best humidity suitable for the release of formaldehyde in furniture and home decoration, the controller controls the humidifier to keep the current running state unchanged, and the indoor environment can be kept high humidity. The high humidity indoor environment can improve the release of formaldehyde in indoor furniture into the air, and at the same time prevent the discomfort caused by temperature rise to the user.

[0144] The fresh air fan runs at a first power, which can prevent the indoor temperature difference from fluctuating too much due to too much outdoor fresh air introduced when the outdoor temperature is low, thereby causing discomfort to the human body.

[0145] When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to run at a second power which is lower than the upper limit of the rated power range of the humidifier.

[0146] When the indoor humidity is lower than the first humidity, it means that the indoor humidity has not reached the best humidity suitable for the release of formaldehyde in furniture and home decoration, the controller controls the humidifier to run at a second power which is lower than the upper limit of the rated power range of the humidifier, so that the indoor humidity can rise to the first humidity. By increasing the indoor humidity, the release of formaldehyde in indoor furniture and home decoration into the air can be improved, and at the same time, the temperature is controlled to maintain the first temperature to prevent the discomfort caused by temperature rise to the user.

[0147] It should be noted that the first humidity is not a fixed value, but a variable value. For different first temperatures, the air conditioner has a first humidity matched therewith. Under the condition of the first temperature and the first humidity corresponding to the first temperature, the human body will not feel uncomfortable, and the release rate of formaldehyde can reach the maximum value.

[0148] When the controller receives the command to start the formaldehyde removal mode, the temperature set by the user is still the highest priority, so as to avoid the change of indoor temperature regulation when the dehumidification program is running, causing discomfort to the user.

[0149] When the controller receives the command to start the formaldehyde removal mode, if the inner and outer air deflectors are in the non-windless state at this time, the motion state of the inner and outer air deflectors is kept unchanged, so that the resistance of the indoor air flowing out of the heat exchange air outlet is small, ensuring that the indoor air can circulate quickly.

[0150] If the inner and outer air deflectors are in the anti-direct blowing state at this time, the state of the inner and outer air deflectors is kept unchanged.

[0151] If the inner and outer air deflectors are in the non-windless state at this time, the controller controls the inner and outer air deflectors to be adjusted to the anti-direct blowing state. Since the inner and outer air deflectors partially block the air flowing out of the heat exchange air outlet in the non-windless state, the adjustment of the state can promote the disturbance of the indoor air, so that the indoor air circulates quickly, thereby promoting the release of formaldehyde in furniture and home decoration, and avoiding the discomfort caused by the large direct blowing speed of the heat exchange fan to the user.

[0152] When it is detected that there is someone in the room, the indoor temperature sensor and the indoor humidity sensor detect the changes of the indoor temperature and the indoor humidity in real time, and the compressor maintains the current operating state unchanged. When the indoor humidity decreases below the first humidity, the controller controls the humidification module to start and humidify at a second power lower than the upper limit of the rated power range of the humidifier. Controlling the humidifier to operate at a low humidification power avoids the discomfort caused by the rapid change of indoor humidity to the user, while ensuring that the indoor humidity can reach the first humidity, thereby promoting the release of formaldehyde in furniture and home decoration.

[0153] When the formaldehyde removal mode is started, after the first duration of the formaldehyde removal mode, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration detected by the formaldehyde concentration sensor is lower than the second preset concentration, the fresh air fan is stopped, the humidifier is stopped, and the compressor and the heat exchange fan are kept in the current operating state. At this time, one cycle of formaldehyde removal is completed.

[0154] After the first duration, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is lower than the second preset concentration, it means that the indoor formaldehyde concentration is low at this time and will not harm the human body. At this time, the fresh air fan and the humidifier are stopped, thereby saving the energy consumption of the air conditioner indoor unit during operation, and the compressor and the heat exchange fan are kept in the current operating state, which can avoid the problem of high energy consumption caused by the frequent change of operating frequency of the compressor.

[0155] The first time length can be set to 1.5 hours. In general, the best indoor temperature and humidity environment for the human body is about 25°C and 50% relative humidity. Under this condition, the time for the fresh air fan to replace the indoor air once is about 1.5 hours.

[0156] After the first time length, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, the controller controls the fresh air fan, the humidifier, the compressor and the heat exchange fan to keep the current state running for the first preset time, and then controls the fresh air fan to stop running, controls the humidifier to stop running, and controls the compressor and the heat exchange fan to keep the current running state unchanged. At this time, one aldehyde removal cycle ends.

[0157] After the first time length, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, it indicates that the indoor formaldehyde concentration at this time is still lower than the safety value. The controller controls the fresh air fan, the humidifier, the compressor and the heat exchange fan to keep the current state running for the first preset time, so as to promote the release of indoor formaldehyde and the discharge of indoor formaldehyde to the outdoor.

[0158] After the first preset time, the indoor formaldehyde concentration is further reduced. At this time, the controller controls the fresh air fan and the humidifier to stop running, thereby saving the energy consumption of the air conditioner indoor unit in operation, and controls the compressor and the heat exchange fan to keep the current running state unchanged, which can avoid the problem of high energy consumption caused by the frequent change of the running frequency of the compressor.

[0159] Referring to Figures 9-20 In some embodiments, one aldehyde removal cycle includes: when the aldehyde removal mode is started, if the indoor heat exchanger of the air conditioner indoor unit works as a condenser when the human sensor detects that there is no one in the room. The controller controls to judge whether the indoor temperature is lower than the first preset temperature and whether the indoor humidity is lower than the first preset humidity.

[0160] 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 running frequency of the compressor.

[0161] The controller increases the heat exchange amount of the indoor heat exchanger by controlling to increase 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 indoor environment with high temperature and high humidity can further promote the release of formaldehyde in indoor furniture.

[0162] 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 running frequency of the compressor and controls to start the humidifier.

[0163] The controller controls the compressor to increase the heat exchange amount of the indoor heat exchanger by increasing the frequency of the compressor, so that the indoor air is heated by the indoor heat exchanger when the indoor air flows through the indoor heat exchanger, and the heated indoor air flows to the indoor environment through the heat exchange air outlet, thereby increasing the indoor temperature.

[0164] When the indoor humidity is lower than the first preset humidity, 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. 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 the indoor furniture.

[0165] 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 operating frequency of the compressor to be unchanged, 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, while controlling the humidifier to be turned on.

[0166] 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. 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 the indoor furniture.

[0167] 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 operating frequency of the compressor to be unchanged, 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, thereby avoiding that the change of the operating frequency of the compressor leads to high energy consumption. The controller controls the operating state of the humidifier to be unchanged, and controls the heat exchange fan to operate at the upper limit value of the rated power range of the heat exchange fan.

[0168] 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. 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 the indoor furniture.

[0169] Controlling the heat exchange fan to operate at the upper limit value of the rated power range of the heat exchange fan can promote the flow of indoor air, increase 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, under the condition that the operating frequency of the compressor is unchanged.

[0170] In some embodiments, one aldehyde removal cycle includes: when the air conditioner indoor unit is in the aldehyde removal mode, if the indoor heat exchanger of the air conditioner indoor unit works as an evaporator, the controller controls the indoor heat exchanger to work as a condenser, and controls the indoor and outdoor air deflectors to rotate to the minimum air deflector position. At the same time, the controller controls to determine whether the indoor temperature is lower than the first preset temperature and whether the indoor humidity is lower than the first preset humidity.

[0171] The indoor and outdoor air deflectors are controlled to rotate to the minimum air deflector position to reduce the resistance of the indoor air flowing out of the heat exchange air outlet, improve the disturbance effect of the air conditioner on the indoor air, and at the same time, the air conditioner heats the indoor air when the indoor air flows through the indoor heat exchanger, so as to raise the indoor temperature to facilitate the release of formaldehyde in the indoor furniture into the air.

[0172] 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.

[0173] The controller controls to increase the operating frequency of the compressor, thereby increasing the heat exchange amount of the indoor heat exchanger, so that the indoor air is heated by the indoor heat exchanger when the indoor air flows through 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 the indoor furniture.

[0174] 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.

[0175] The controller controls to increase the operating frequency of the compressor, thereby increasing the heat exchange amount of the indoor heat exchanger, so that the indoor air is heated by the indoor heat exchanger when the indoor air flows through the indoor heat exchanger, and the heated indoor air flows to the indoor through the heat exchange air outlet, thereby increasing the indoor temperature.

[0176] When the indoor humidity is lower than the first preset humidity, the humidifier is controlled 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 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 the indoor furniture.

[0177] 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.

[0178] 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. 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 the indoor furniture.

[0179] 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 controlled to be unchanged, and the indoor heat exchanger is kept in the current heating state to satisfy that the indoor temperature is not lower than the first preset temperature, avoiding that the change of the operating frequency of the compressor leads to high energy consumption. The operating 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.

[0180] 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. 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 the indoor furniture.

[0181] The heat exchange fan is controlled to operate at the upper limit value of the rated power range of the heat exchange fan, which 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, under the condition that the operating frequency of the compressor is unchanged.

[0182] When the de-aldehyde mode is turned on, the human sensor detects that there is no one in the room, and the indoor heat exchanger works as a condenser. 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.

[0183] The operating frequency of the compressor is controlled to be unchanged, and the operating state of the humidifier and the heat exchange fan is controlled to be unchanged to keep the indoor environment as a high-temperature and high-humidity indoor environment, and further promote the continuous release of formaldehyde in the furniture and home decoration into the air.

[0184] After the second preset time, the indoor formaldehyde concentration is high at this time, and the fresh air fan is controlled to operate at high speed in reverse rotation at the upper limit value of the rated power range of the fresh air fan to discharge the high-concentration formaldehyde in the room to the outdoor.

[0185] The fresh air fan operates at high speed in reverse rotation, which can quickly discharge the indoor formaldehyde to the outdoor compared to the forward rotation of the fresh air fan, and perform efficient de-aldehyde. Since the indoor is in an unoccupied state, it is also not necessary to consider that the rapid discharge of the indoor air to the outdoor causes large indoor temperature fluctuations and discomfort to the user.

[0186] The fresh air fan is controlled to run reversely at an upper limit value of the rated power range of the fresh air fan for a third preset time, and the formaldehyde concentration sensor is controlled to detect the indoor formaldehyde concentration.

[0187] When the indoor formaldehyde concentration is detected to be lower than the second preset concentration, the fresh air fan and the humidifier are controlled to stop running, the compressor and the heat exchange fan are controlled to keep the current running state unchanged, and at this time, one aldehyde removal cycle ends.

[0188] After the fresh air fan runs reversely for the third preset time, the indoor formaldehyde concentration is further reduced, at this time, the fresh air fan and the humidifier are controlled to stop running, thereby saving the energy consumption of the air conditioner indoor unit during running, the compressor and the heat exchange fan are controlled to keep the current running state unchanged, and the problem of excessively high energy consumption caused by frequent changes of the running frequency of the compressor can be avoided. The third preset time can be set to one hour.

[0189] When the indoor formaldehyde concentration is detected to be not lower than the second preset concentration, the controller controls the fresh air fan to continue running for a fourth preset time, so as to continuously discharge the formaldehyde in the indoor air to the outdoor through the running of the fresh air fan. After the fresh air fan continues to run for the fourth preset time, the indoor formaldehyde concentration is further reduced, the fresh air fan and the humidifier are controlled to stop running, the compressor and the heat exchange fan are controlled to keep the current running state unchanged, and at this time, one aldehyde removal cycle ends. It can be set that at this time, the compressor is at the maximum heating power, and the heat exchange fan is running at the upper limit value of the rated power thereof.

[0190] After the fresh air fan continues to run reversely for the fourth preset time, the indoor formaldehyde concentration is further reduced, at this time, the fresh air fan and the humidifier are controlled to stop running, thereby saving the energy consumption of the air conditioner indoor unit during running, the compressor and the heat exchange fan are controlled to keep the current running state unchanged, and the problem of excessively high energy consumption caused by frequent changes of the running frequency of the compressor can be avoided.

[0191] After one aldehyde removal cycle ends, the next aldehyde removal cycle is immediately entered.

[0192] When the aldehyde removal mode is running, the human sensing sensor detects that the user returns home again, the indoor state changes from no one to someone, the controller controls the compressor and the humidifier to switch to the running state before the aldehyde removal mode is started, 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.

[0193] The controller controls the compressor and the humidifier to switch to the running state before the aldehyde removal mode is started, so as to ensure that the indoor humidity and the indoor temperature are suitable temperature and humidity for the user.

[0194] 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 are both kept at the maximum rotation speed, the inner and outer air guide plates are switched to the wind-avoiding position, and the indoor formaldehyde concentration is reduced to below the second preset concentration as soon as possible to avoid the harm of indoor formaldehyde to the user in the room.

[0195] When the indoor formaldehyde concentration is below the second preset concentration, the operation 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.

[0196] It can be provided that when the indoor formaldehyde concentration is not below the second preset concentration, the instruction from the user is shielded and does not have any effect, and the controller will respond to the user's instruction only when the indoor formaldehyde concentration is below the second preset concentration. It should be noted that when the indoor formaldehyde concentration is not below 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 only when the indoor formaldehyde concentration is below the second preset concentration.

[0197] When the formaldehyde removal mode is running, the people sensing sensor detects that the room is unoccupied, and the controller receives a command to turn off the formaldehyde removal mode, the heat exchange fan is controlled to run at a third low power lower than the upper limit of its rated power, and the compressor is controlled to run at a fourth low frequency lower than the upper limit of its rated power, thereby reducing the heat exchange capacity of the indoor heat exchanger and further reducing the indoor temperature, so that the indoor temperature is reduced to be suitable for the user. The fresh air fan is controlled to run in reverse at high speed to discharge the residual formaldehyde in the room to the outdoor.

[0198] At this time, the dehumidification mode is controlled to start running, and when the indoor humidity decreases to a second preset humidity, the dehumidification is stopped, and the working mode of the indoor heat exchanger is switched to the windless mode. The second preset humidity is lower than the first preset humidity.

[0199] When the air conditioner runs in the dehumidification mode, the air conditioner performs a dehumidification cycle of the air conditioner indoor unit by using the compressor, the outdoor heat exchanger, the expansion valve and the indoor heat exchanger.

[0200] The dehumidification cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been adjusted and heat exchanged to provide cold energy to the indoor space through the heat absorption process of the refrigerant, thereby achieving temperature adjustment of the indoor space.

[0201] The compressor compresses the low-temperature and low-pressure state of the refrigerant gas to discharge high-temperature and high-pressure state of the refrigerant gas, 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.

[0202] 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.

[0203] The indoor heat exchanger evaporates the refrigerant expanded in the expansion valve and returns 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.

[0204] During the entire dehumidification cycle, the air conditioner indoor unit can condense moisture in the indoor air into condensed water, thereby reducing the indoor humidity.

[0205] When the formaldehyde removal mode is running, the human sensor detects that the indoor is a person state, and the controller receives a command to turn off the formaldehyde removal mode, the heat exchanger fan is controlled to run at a third power lower than the upper limit of its rated power at a low speed, the compressor is controlled to run at a fourth power lower than the upper limit of its rated power at a low frequency, thereby reducing the heat exchange capacity of the indoor heat exchanger, and further reducing the indoor temperature, so that the indoor temperature is reduced to be suitable for the user. The fresh air fan is controlled to run forward at a first power lower than the upper limit of its rated power at a medium speed, and the residual formaldehyde in the indoor is discharged to the outdoor.

[0206] The fresh air fan is switched to forward medium speed operation 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.

[0207] At the same time, the dehumidification mode is controlled to run, and the indoor humidity is adjusted to the most comfortable humidity value corresponding to the user set temperature, and the most comfortable humidity value is defined as the second humidity. The controller can be internally integrated with preset second humidities corresponding to various temperatures. When the indoor humidity reaches the second humidity, the dehumidification mode is controlled to stop, and the heat exchanger working mode is switched to the windless mode to avoid the discomfort caused by the direct blowing of the air conditioner outlet to the user.

[0208] When the compressor stops running, the user starts the formaldehyde removal mode, at which time the controller receives a 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.

[0209] In some embodiments, a prompt sticker can be provided on the control panel of the shell 100, or when the user separately starts the formaldehyde removal function on the control software corresponding to the air conditioner indoor unit, a corresponding prompt information will pop up on the control software. 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.

[0210] Referring to Figures 1-20In some embodiments, the air conditioner indoor unit is also provided with an aldehyde removal module, which is used to remove formaldehyde in indoor air. The aldehyde removal module removes formaldehyde in indoor air in the following ways, including but not limited to physical adsorption (for example: activated carbon adsorption material), chemical bonding (for example: potassium permanganate chemical reaction), catalytic oxidation (for example: photocatalyst catalysis, normal temperature catalyst catalysis, high temperature catalyst catalysis) and other technical means.

[0211] When the aldehyde removal mode is started, the aldehyde removal module is turned on to make indoor air flow through the aldehyde removal module when the human sensor detects that the indoor is in the state of being occupied. When the human sensor detects that the indoor is in the state of being unoccupied, the aldehyde removal module is turned off to make indoor air not flow through the aldehyde removal module, thereby improving the service life of the aldehyde removal module.

[0212] If the indoor heat exchanger of the air conditioner indoor unit works as an evaporator at this time, the controller controls the air conditioner to issue a reminder, thereby reminding the user that the aldehyde removal mode needs to be started in the heating mode. It can also be understood that the user is reminded that the aldehyde removal mode needs to be started when the indoor heat exchanger works as a condenser.

[0213] An aldehyde removal cycle includes: when the aldehyde removal mode is started, the aldehyde removal module is turned on to make indoor air flow through the aldehyde removal module when the human sensor detects that the indoor is in the state of being occupied, thereby improving the aldehyde removal effect.

[0214] If the indoor heat exchanger of the air conditioner indoor unit works as a condenser at this time, the controller sets the indoor temperature of the current air conditioner indoor unit as a first temperature, and sets a first humidity corresponding to the first temperature in the controller. At this time, the indoor temperature control command of the air conditioner in the aldehyde removal mode is inhibited, and the controller operates with the highest priority of the indoor temperature set by the user.

[0215] At the same time, the controller controls to judge whether the current indoor humidity is lower than the first humidity.

[0216] When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the controller controls the humidifier to keep the current operating state unchanged, and controls the fresh air fan to run in the forward direction at a first power lower than the upper limit of the rated power range of the fresh air fan.

[0217] When the indoor humidity is not lower than the first humidity, it means that the indoor humidity has reached the optimal humidity suitable for the release of formaldehyde in furniture and home decoration. The controller controls the humidifier to keep the current operating state unchanged, and the indoor environment can be kept in a high humidity environment. The high humidity indoor environment can improve the release of formaldehyde in indoor furniture into the air, and at the same time prevent the user from being uncomfortable due to the increase of temperature.

[0218] The new air fan runs at a medium speed with the first power, which can prevent the indoor temperature difference from fluctuating greatly due to the large amount of outdoor new air introduced when the outdoor temperature is low, thereby causing discomfort to the human body.

[0219] When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to run at a second power lower than the upper limit of the rated power range of the humidifier.

[0220] When the indoor humidity is lower than the first humidity, it indicates that the indoor humidity has not reached the optimal humidity suitable for the release of formaldehyde in furniture and home decoration. The controller controls the humidifier to run at a second power lower than the upper limit of the rated power range of the humidifier, which can make the indoor humidity rise to the first humidity. By increasing the indoor humidity, the release of formaldehyde in furniture and home decoration into the air can be improved, and at the same time, the temperature is controlled to maintain the first temperature to prevent the temperature from rising and causing discomfort to the user.

[0221] It should be noted that the first humidity is not a fixed value, but a variable value. For different first temperatures, the air conditioner has a first humidity matched therewith. Under the condition of the first temperature and the first humidity corresponding to the first temperature, the human body will not feel uncomfortable, and the release rate of formaldehyde can reach the maximum value.

[0222] After the controller receives the command to start the formaldehyde removal mode, it still runs at the temperature set by the user as the highest priority, thereby avoiding the influence of the change in indoor temperature regulation when the dehumidification program runs on the user.

[0223] When the formaldehyde removal mode is started, after the formaldehyde removal mode runs for a first duration, the indoor formaldehyde concentration is detected. When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than a second preset concentration, the new air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and the heat exchanger fan are controlled to remain in the current running state. At this time, one formaldehyde removal cycle is completed.

[0224] After the first duration, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is lower than the second preset concentration, it indicates that the indoor formaldehyde concentration is low at this time and will not harm the human body. At this time, the new air fan and the humidifier are controlled to stop running, thereby saving the energy consumption of the air conditioner indoor unit when running, and the compressor and the heat exchanger fan are controlled to remain in the current running state, which can avoid the problem of high energy consumption caused by the frequent change of the running frequency of the compressor.

[0225] The first duration can be set to 1.5 hours. Under normal circumstances, the optimal temperature and humidity environment for the human body in the room is generally 25℃ and a relative humidity of about 50%. Under this condition, the new air fan will replace the indoor air once in about 1.5 hours.

[0226] After the first duration, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, the fresh air fan, the humidifier, the compressor and the heat exchange fan are controlled to keep the current state running for the first preset time, then the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and the heat exchange fan are controlled to keep the current running state unchanged. At this time, one aldehyde removal cycle ends.

[0227] After the first duration, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, it means that the indoor formaldehyde concentration is still not lower than the safety value at this time, and the fresh air fan, the humidifier, the compressor and the heat exchange fan are controlled to keep the current state running for the first preset time to promote the release of indoor formaldehyde and the discharge of indoor formaldehyde to the outdoor.

[0228] After the first preset time, the indoor formaldehyde concentration is further reduced, at this time the fresh air fan and the humidifier are controlled to stop running, thereby saving the energy consumption of the air conditioner indoor unit in operation, the compressor and the heat exchange fan are controlled to keep the current running state unchanged, which can avoid the problem of high energy consumption caused by the frequent change of the running frequency of the compressor.

[0229] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned 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-mentioned embodiments within the scope of the present application.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: An air conditioner indoor unit comprising: A shell with a heat exchange air outlet; An indoor heat exchanger arranged inside the shell, which exchanges heat between the flowing refrigerant 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 delivered to the indoor unit through the heat exchange air outlet; A humidifier arranged in the shell, which is used to generate steam to flow to the outside of the shell; 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 fresh air fan arranged in the shell, which drives outdoor air to enter the indoor unit through the fresh air fan when the fresh air fan is rotating forward, and drives indoor air to be discharged to the outdoor through the fresh air fan when the fresh air fan is rotating reversely; A formaldehyde concentration sensor for detecting the indoor formaldehyde concentration; An air conditioner outdoor unit comprising at least a compressor, which is connected to the indoor heat exchanger through a refrigerant circuit; The controller is configured to: detect that there is a person in the room through the human sensor, define the indoor temperature of the current air conditioner indoor unit setting as a first temperature when the indoor heat exchanger works as a condenser, and set a first humidity corresponding to the first temperature in the controller; When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, control the humidifier to keep the current operating state unchanged, and control the fresh air fan to rotate forward at a first power lower than the upper limit of the rated power range of the fresh air fan; When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, control the humidifier to operate at a second power lower than the upper limit of the rated power range of the humidifier; When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than a second preset concentration, control the fresh air fan to stop operating, control the humidifier to stop operating, and control the compressor and the heat exchange fan to keep the current operating state unchanged; When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, control the fresh air fan, the humidifier, the compressor and the heat exchange fan to keep the current state operating for a first preset time, then control the fresh air fan to stop operating, control the humidifier to stop operating, and control the compressor and the heat exchange fan to keep the current operating state unchanged.

2. The air conditioner of claim 1, wherein The controller is configured to: When the human sensor detects that there is no person in the room and the indoor heat exchanger works as a condenser; When the indoor temperature sensor detects that the indoor temperature is lower than a first preset temperature and the indoor humidity sensor detects that the indoor humidity is not lower than a 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: When the human sensor detects that there is no person in the room and the indoor heat exchanger works as a condenser; 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 operation frequency of the compressor is controlled to be increased, and the humidifier is controlled to be turned on.

4. The air conditioner of claim 1, wherein, the controller is configured to: when the indoor heat exchanger is operating as a condenser and the people sensor detects that the indoor space is unoccupied, 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 operation frequency of the compressor is controlled to be unchanged, and the humidifier is controlled to be turned on.

5. The air conditioner of claim 1, wherein, the controller is configured to: when the indoor heat exchanger is operating as a condenser and the people sensor detects that the indoor space is unoccupied, 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 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 an upper limit value of a rated power range of the heat exchange fan.

6. The air conditioner of claim 1, wherein, the controller is configured to: when the indoor heat exchanger is operating as a condenser, 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 operation frequency of the compressor is controlled to be unchanged, and the operation states of the humidifier and the heat exchange fan are controlled to be unchanged, after a second preset time, the fresh air fan is controlled to operate in reverse at an upper limit value of a rated power range of the fresh air fan.

7. The air conditioner of claim 6, wherein, after the second preset time, the fresh air fan is controlled to operate in reverse at the upper limit value of the rated power range of the fresh air fan for a third preset time, and then the indoor formaldehyde concentration sensor is controlled to detect the indoor formaldehyde concentration, when the indoor formaldehyde concentration is detected to be lower than a second preset concentration, the fresh air fan and the humidifier are controlled to stop operating, and the compressor and the heat exchange fan are controlled to maintain the current operation states unchanged.

8. An air conditioner characterized by comprising: comprises: an air conditioner indoor unit comprising: a housing having a heat exchange air outlet; an indoor heat exchanger disposed inside the housing, the indoor heat exchanger performing heat exchange between refrigerant flowing inside the indoor heat exchanger and indoor air to form a heating cycle or a cooling cycle, and the indoor air flowing outside the housing after the heat exchange; a heat exchange fan for driving the indoor air to flow through the heat exchange air outlet to the indoor space; a humidifier disposed in the housing, the humidifier being configured to generate steam to flow to the outside of the housing; an aldehyde removal module for removing formaldehyde in air flowing through the aldehyde removal module; a people sensor for detecting whether the indoor space is occupied; an indoor temperature sensor for detecting the indoor temperature; an indoor humidity sensor for detecting the indoor humidity; A fresh air fan is arranged in the shell. When the fresh air fan rotates forward, it drives outdoor air to enter the indoor through the fresh air fan. When the fresh air fan rotates reversely, it drives indoor air to be discharged to the outdoor through the fresh air fan. A formaldehyde concentration sensor is arranged for detecting the formaldehyde concentration in the indoor. 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 is detected to be in the state of having people by the human sensor, the de-aldehyde module is controlled to be turned on so that the indoor air flows through the de-aldehyde module. When the indoor heat exchanger works as a condenser, the indoor temperature of the current air conditioner indoor unit is defined as a first temperature, and a first humidity corresponding to the first temperature is set in the controller. When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to keep the current operation state unchanged, and the fresh air fan is controlled to rotate forward at a first power lower than the upper limit of the rated power range of the fresh air fan. When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to operate at a second power lower than the upper limit of the rated power range of the humidifier. When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than a second preset concentration, the fresh air fan is controlled to stop operating, the humidifier is controlled to stop operating, and the compressor and the heat exchanger fan are controlled to keep the current operation state unchanged. When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, the fresh air fan, the humidifier, the compressor and the heat exchanger fan are controlled to keep the current state operating for a first preset time, then the fresh air fan is controlled to stop operating, the humidifier is controlled to stop operating, and the compressor and the heat exchanger fan are controlled to keep the current operation state unchanged.

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