Air conditioner indoor unit

Abstract

The application relates to an air conditioner indoor unit, comprising: a shell; an indoor heat exchanger; an electric heating device; a fresh air fan; a formaldehyde concentration sensor arranged in the shell and used for detecting indoor formaldehyde concentration; and a controller configured to: when the indoor temperature is lower than a first preset temperature, the indoor heat exchanger is used as a condenser; when the indoor heat exchanger is used as the condenser and runs for a first preset time, and the indoor temperature is detected to be lower than the first preset temperature, the electric heating device is controlled to be turned on; when the indoor formaldehyde concentration is detected to be higher than a first preset concentration, the fresh air fan is controlled to be turned on to introduce fresh air into the room; when the indoor formaldehyde concentration is detected to be lower than a second preset concentration, the electric heating device is controlled to be turned off, and the indoor heat exchanger is controlled to stop running, and the first preset concentration is higher than the second preset concentration, so that the formaldehyde releasing and de-aldehyde effects are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner indoor unit. 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, as the number one killer affecting the health of the family scene, more and more users begin to seek reliable and effective ways to remove formaldehyde. 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 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 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 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 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 an electric heating device to increase the indoor temperature during heating, but there is no disclosure of using the electric heating device in cooperation with the indoor heat exchanger to remove formaldehyde.

[0006] In related technologies, indoor air flows through the formaldehyde removal filter screen to remove formaldehyde gas in indoor air, but the current removal of formaldehyde by the air conditioner indoor unit is single in the way of removing formaldehyde, low in the efficiency of removing formaldehyde, and needs to replace the formaldehyde removal module frequently, which cannot implement different ways of removing formaldehyde according to different indoor temperatures and indoor humidities. 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 indoor unit to improve the indoor temperature when the heating capacity of the indoor heat exchanger is insufficient, and to ensure that the formaldehyde removal effect and energy consumption are optimal.

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

[0010] a shell, which is provided with a heat exchange air outlet;

[0011] an indoor heat exchanger, which exchanges heat between the refrigerant flowing inside and indoor air to form a heating cycle or a refrigeration cycle;

[0012] an electric heating device, which is arranged in the shell and is used for heating indoor air to flow to the indoor unit through the heat exchange air outlet;

[0013] a fresh air fan, which is arranged in the shell and is used for conveying outdoor fresh air to the indoor unit;

[0014] a formaldehyde concentration sensor, which is arranged in the shell and is used for detecting the indoor formaldehyde concentration;

[0015] a controller, which is configured to:

[0016] when the indoor temperature is lower than a first preset temperature, the indoor heat exchanger is used as a condenser;

[0017] when the indoor heat exchanger is used as the condenser and runs for a first preset time, and the indoor temperature is detected to be lower than the first preset temperature, the electric heating device is controlled to be turned on;

[0018] when the indoor formaldehyde concentration is detected to be higher than a first preset concentration, the fresh air fan is controlled to be turned on to introduce fresh air to the indoor unit;

[0019] when the indoor formaldehyde concentration is detected to be lower than a second preset concentration, the electric heating device is controlled to be turned off, and the indoor heat exchanger is controlled to stop running, and the first preset concentration is higher than the second preset concentration.

[0020] After the air conditioner indoor unit of the application is turned on in the formaldehyde removal mode, when the indoor heat exchanger is used as the condenser and runs for the first preset time, and the indoor temperature is detected to be lower than the first preset temperature, it indicates that the heating capacity of the indoor heat exchanger is insufficient to increase the indoor temperature to the first preset temperature. The electric auxiliary heating device is turned on to promote the increase of the indoor temperature and improve the heating capacity of the indoor heat exchanger. After the indoor temperature is increased, the formaldehyde in the furniture is released into the air, thereby improving the formaldehyde release and formaldehyde removal effect.

[0021] In some embodiments of the application, the air conditioner indoor unit further comprises:

[0022] a human sensor, which is used for detecting whether there is a person in the indoor unit;

[0023] the controller is configured to: when the human sensor detects that there is a person in the indoor unit, the air conditioner indoor unit is controlled to issue a prompt; and when the prompt is issued for a preset time, the human sensor is controlled to detect whether there is a person in the indoor unit.

[0024] In some embodiments of the present application, further comprising:

[0025] The heat exchange fan is arranged in the shell, and the heat exchange fan is used for conveying indoor air to the indoor through the heat exchange air outlet.

[0026] The controller is configured to control the indoor heat exchanger to stop running and control the heat exchange fan to run at the first speed for the first disturbance time when the human sensing sensor detects that the indoor is empty.

[0027] When it is detected that the indoor formaldehyde concentration is higher than the third preset concentration, the speed of the heat exchange fan is increased.

[0028] In some embodiments of the present application, the controller is configured to control the indoor heat exchanger not to start running when the indoor temperature is not lower than the first preset temperature.

[0029] In some embodiments of the present application, further comprising: a humidifier arranged in the shell, and the humidifier is used for generating steam to flow to the indoor.

[0030] The controller is configured to detect the indoor humidity after the electric heating device is turned on for the first time length.

[0031] When the indoor humidity is lower than the first preset humidity, the humidifier is controlled to be turned on.

[0032] When the indoor humidity is not lower than the first preset humidity, the humidifier is controlled to be turned off.

[0033] In some embodiments of the present application, when the controller controls the emergency formaldehyde removal mode to run, the indoor heat exchanger is used as a condenser to run for a second time length, then the humidifier is turned on; the humidifier is turned on for a third time length, then the fresh air fan is turned on; the fresh air fan is turned on for a fourth time length, then the controller controls to issue a warning.

[0034] Another aspect of the present application provides an air conditioner indoor unit, comprising:

[0035] The shell is provided with a heat exchange air outlet.

[0036] The indoor heat exchanger exchanges heat between the refrigerant flowing inside and the air to form a heating cycle or a refrigeration cycle.

[0037] The window opening and closing machine is used for controlling the opening or closing of the window.

[0038] The formaldehyde concentration sensor is arranged in the shell, and is used for detecting the indoor formaldehyde concentration.

[0039] The controller is configured to:

[0040] when the indoor temperature is lower than a first preset temperature, the indoor heat exchanger is used as a condenser to heat the indoor air; when it is detected that the indoor temperature is not lower than the first preset temperature, the indoor humidity is detected;

[0041] when the indoor humidity is not lower than a first preset humidity, the indoor heat exchanger is controlled to be used as a condenser to run for a first time period, and the indoor formaldehyde concentration is detected;

[0042] when it is detected that the indoor formaldehyde concentration is higher than a first preset concentration, the outdoor particulate matter concentration is detected;

[0043] when it is detected that the outdoor particulate matter concentration is lower than a first particulate matter concentration, the window opening machine opens the window;

[0044] when it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, the window opening machine closes the window.

[0045] In some embodiments of the present application, further comprising:

[0046] a heat exchange fan arranged in the shell, the heat exchange fan being configured to deliver the indoor air to the indoor space through the heat exchange air outlet;

[0047] a humidifier arranged in the shell, the humidifier being configured to generate steam to flow to the indoor space;

[0048] the controller is configured to, when the window is open and it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, control the heat exchange fan to reduce the rotation speed, control the indoor heat exchanger to stop running, control the humidifier to run at a first power, and control the window opening machine to close the window.

[0049] In some embodiments of the present application, further comprising: an aldehyde removal module arranged in the shell, the aldehyde removal module being configured to remove formaldehyde in the indoor air;

[0050] the controller is configured to, when it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, control the window opening machine to close the window and control the aldehyde removal module to start.

[0051] when the window is closed and it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, the heat exchange fan is controlled to reduce the rotation speed, the indoor heat exchanger is controlled to stop running, and the humidifier is controlled to be closed.

[0052] In some embodiments of the present application, further comprising: a fresh air fan arranged in the shell, the fresh air fan being configured to deliver outdoor fresh air to the indoor space;

[0053] the controller is configured to, when it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, control the window opening machine to close the window and control the fresh air fan to start to introduce fresh air to the indoor space.

[0054] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application;

[0056] Figure 2 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 1

[0057] Figure 3 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 2

[0058] Figure 4 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 1

[0059] Figure 5 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 2

[0060] Figure 6 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 3

[0061] Figure 7 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 4

[0062] Figure 8 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 5

[0063] Figure 9 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 6

[0064] Figure 10 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 7

[0065] Figure 11 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; Figure 8

[0066] Figure 12 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application; ​​​​​​​​​​

[0067] Figure 13 is a working flow chart of an air conditioner indoor unit provided with an aldehyde removal module according to an embodiment of the present application;

[0068] Figure 14 is a working flow chart of an air conditioner indoor unit provided with a fresh air fan according to an embodiment of the present application;

[0069] Figure 15 is a working flow chart of an air conditioner indoor unit provided with an aldehyde removal module and a fresh air fan according to an embodiment of the present application.

[0070] In the above figures: housing 100; air conditioner outdoor unit 200. DETAILED DESCRIPTION

[0071] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 on the present application.

[0072] 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, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication 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.

[0073] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be 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 "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means 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 that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0074] In the present disclosure, 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 disclosure. Exemplary expressions of the above terms do not necessarily refer to the same embodiment or example in this specification. Also, a particular feature, structure, material, or characteristic can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and coordinate different embodiments or examples described in the present disclosure and features of different embodiments or examples, without contradiction, if necessary.

[0075] Hereinafter, the present disclosure will be described in detail through exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment can be beneficially incorporated into other embodiments without further recitation.

[0076] In the present disclosure, an air conditioner includes an air conditioner indoor unit and an air conditioner outdoor unit. 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] In the entire cooling cycle, the air conditioner indoor unit can adjust the temperature of the indoor space.

[0082] When the air conditioner operates in a heating mode, the air conditioner performs a heating cycle of the air conditioner indoor unit by using the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger.

[0083] The heating cycle involves a series of processes, including compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air. The refrigerant releases heat to the indoor space, thereby regulating the temperature of the indoor space.

[0084] The compressor compresses the refrigerant gas at low temperature and low pressure, discharging it as refrigerant gas at high temperature and high pressure. The discharged refrigerant gas flows into the indoor heat exchanger. The indoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat generated by condensation exchanges heat with the indoor air flowing through the heat exchanger, thereby increasing the indoor temperature.

[0085] The expansion valve causes the high-temperature, high-pressure liquid refrigerant that condenses in the outdoor heat exchanger to expand into a low-pressure liquid refrigerant.

[0086] The outdoor heat exchanger evaporates the refrigerant that expands in the expansion valve, and returns the refrigerant gas, which is in a low-temperature, low-pressure state, to the compressor. The outdoor heat exchanger can exchange heat with the outdoor air by utilizing the latent heat of refrigerant evaporation.

[0087] Throughout the heating cycle, the indoor unit of the air conditioner can regulate the temperature of the indoor space.

[0088] An air conditioner outdoor unit includes at least a compressor and an outdoor heat exchanger, and an air conditioner indoor unit includes at least an indoor heat exchanger. An expansion valve may be provided in either the air conditioner indoor unit or the air conditioner outdoor unit.

[0089] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the indoor unit of the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an indoor heat exchanger, the indoor unit of the air conditioner functions as a cooler in cooling mode.

[0090] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0091] As attached Figures 1 to 11 As shown, this is one embodiment of the air conditioner of the present invention.

[0092] An air conditioner includes an indoor unit and an outdoor unit. The outdoor unit includes a compressor and an outdoor heat exchanger, while the indoor unit includes an indoor heat exchanger. An expansion valve can be located in either the indoor or outdoor unit.

[0093] The air conditioner of this application includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and piping for refrigerant flow. Both the indoor and outdoor heat exchangers are connected to the compressor. The expansion valve is an electronic expansion valve, which is connected between the indoor and outdoor heat exchangers and is capable of expanding the liquid refrigerant that has undergone the condensation process into a low-pressure liquid refrigerant.

[0094] The compressor includes a suction port and a discharge port, and the refrigerant that has undergone an evaporation process absorbs heat from the suction port and enters the compressor, and the compressor compresses the gaseous refrigerant into a high-temperature and high-pressure state and discharges it from the discharge port.

[0095] The indoor heat exchanger and the outdoor heat exchanger are connected through a four-way valve and a compressor in the refrigerant circuit, respectively. The four-way valve includes 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.

[0096] In the refrigerant circuit, the refrigerant can sequentially circulate through the compressor, the indoor heat exchanger, the expansion valve and the outdoor heat exchanger.

[0097] When the air conditioner is in a 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 a 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.

[0098] In the following, the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0099] As shown in the accompanying drawings, Figures 1 to 11 As shown in the accompanying drawings,

[0100] The shell 100 is provided with a heat exchange air outlet; the heat exchange fan is arranged in the shell 100; the heat exchange fan is used for conveying indoor air to the indoor through the heat exchange air outlet; the refrigerant flowing in the indoor heat exchanger exchanges heat with the air to form a heating cycle or a refrigeration cycle; the fresh air fan is arranged in the shell 100, and the fresh air fan is used for conveying outdoor fresh air to the indoor; the formaldehyde concentration sensor is arranged in the shell, and the formaldehyde concentration sensor is used for detecting the indoor formaldehyde concentration. The indoor humidity sensor is arranged in the shell, and the indoor humidity sensor is used for detecting the indoor humidity; the indoor temperature sensor is arranged in the shell, and the indoor temperature sensor is used for detecting the indoor temperature.

[0101] The controller is configured to: when the indoor temperature is lower than a first preset temperature, the indoor heat exchanger is used as a condenser; when the indoor heat exchanger is used as the condenser and runs for a first preset time, and it is detected that the indoor temperature is lower than the first preset temperature, the electric heating device is controlled to be turned on; when it is detected that the indoor formaldehyde concentration is higher than a first preset concentration, the fresh air fan is controlled to be turned on to introduce fresh air into the indoor; when it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, the electric heating device is controlled to be turned off, and the indoor heat exchanger is controlled to stop running, and the first preset concentration is higher than the second preset concentration.

[0102] Through the above scheme, after the indoor air conditioner is started in the formaldehyde removal mode, when the indoor heat exchanger is used as a condenser to run for a first preset time, and the indoor temperature is detected to be lower than a first preset temperature, it indicates that the heating capacity of the indoor heat exchanger is insufficient at this time, and the indoor temperature cannot be raised to the first preset temperature. By starting the electric auxiliary heating device to promote the increase of the indoor temperature, the heating capacity of the indoor heat exchanger is improved, and after the indoor temperature is raised, the formaldehyde in the furniture is released into the air, thereby improving the formaldehyde release and formaldehyde removal effect.

[0103] The first preset concentration is the concentration when the indoor formaldehyde concentration reaches an equilibrium state, and the second preset concentration is a concentration at which the value of the indoor formaldehyde concentration does not cause harm to the human body. The first preset concentration is greater than the second preset concentration. When the indoor formaldehyde concentration is higher than the first preset concentration, it indicates that the indoor formaldehyde concentration is relatively high at this time, and the formaldehyde released from the furniture into the air has basically reached a saturated equilibrium state. At this time, the fresh air fan is started to deliver outdoor fresh air into the room, and the indoor air containing formaldehyde is discharged outdoors to complete the formaldehyde discharge. The way in which the fresh air fan delivers fresh air into the room can be to directly introduce outdoor fresh air into the room through a fresh air pipe, or the fresh air fan can deliver indoor air to the outdoor to form a negative pressure in the room, and outdoor fresh air enters the room through a door gap or a window gap.

[0104] When the indoor formaldehyde concentration is lower than the second preset concentration, the indoor formaldehyde concentration has decreased to a concentration range that does not cause harm to the human body at this time. At this time, the electric heating device is turned off and the indoor heat exchanger is controlled to stop running, so that the indoor heat exchanger stops heating, and one formaldehyde removal cycle ends.

[0105] The indoor heat exchanger further comprises an inner air guide plate, which is arranged at the heat exchange air outlet. 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 shell through the indoor air inlet, flows through the indoor heat exchanger, and is discharged into the indoor space through the heat exchange air outlet.

[0106] When the air conditioner indoor unit is a cabinet type air conditioner indoor unit, the inner air guide plate can swing up and down to swing the indoor air up and down.

[0107] When the air conditioner indoor unit is a hanging type air conditioner indoor unit, the inner air guide plate can swing left and right to swing the indoor air left and right.

[0108] In some embodiments, the air conditioner indoor unit further comprises a human sensing sensor for detecting whether there is a person in the room.

[0109] When the controller receives a command to start the formaldehyde removal mode, the human sensing sensor is started to detect whether there is a person in the room.

[0110] When the human sensor detects that there is a person in the room, the controller controls the air conditioner indoor unit to issue a prompt to remind the user to leave the room within a preset time. When the prompt is issued for a preset time, the human sensor detects again whether there is a person in the room. When it is detected that there is no person in the room, the controller controls to execute an aldehyde removal cycle. The air conditioner indoor unit issues a prompt in the form of voice or through the control software of the air conditioner indoor unit. The preset time can be set to five minutes.

[0111] An aldehyde removal cycle includes: when the aldehyde removal cycle starts, the indoor heat exchanger is not started to run, the heat exchanger fan is controlled to be started, and the heat exchanger fan runs at a first speed for a first disturbance time. At the same time, the inner air deflector swings back and forth to disturb the air in the room, so as to enhance the air flow speed of the indoor air and the surface of the wooden furniture, thereby promoting the release of formaldehyde.

[0112] The first disturbance time can be determined according to the ratio of the rated air volume of the heat exchanger fan and the indoor space. The first disturbance time of the cabinet type air conditioner indoor unit can be set to five minutes, and the first disturbance time of the wall-mounted air conditioner indoor unit can be set to three minutes.

[0113] After the heat exchanger fan runs at the first speed for the first disturbance time, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is higher than a third preset concentration, the controller controls to increase the rotating speed of the heat exchanger fan, i.e. the rotating speed of the heat exchanger fan is switched from medium speed to high speed, so as to quickly disturb the indoor air. After the rotating speed of the heat exchanger fan is increased, the inner air deflector stops swinging back and forth at this time, and the inner air deflector rotates to the minimum air blocking position, so as to reduce the resistance of the inner air deflector to the indoor air flowing out of the heat exchange air outlet and improve the air volume of the indoor air flowing out of the heat exchange air outlet.

[0114] When the dehumidification cycle runs, the inner air deflector of the heat exchange air outlet of the air conditioner and the air deflector of the fresh air outlet are both at the minimum air blocking position, so as to reduce the resistance to air flow and improve the air supply distance and the disturbance effect of the indoor air.

[0115] In some embodiments, after the controller of the air conditioner indoor unit receives a command to start the aldehyde removal mode, the formaldehyde concentration sensor detects the initial indoor formaldehyde concentration at this time, and the third preset concentration can be set to a multiple of the initial indoor formaldehyde concentration. The third preset concentration can be set to twice the initial indoor formaldehyde concentration. That is, when it is detected that the indoor formaldehyde concentration is higher than twice the initial indoor formaldehyde concentration, it means that a large amount of formaldehyde is released from the furniture and home decoration into the indoor air at this time. At this time, increasing the rotating speed of the heat exchanger fan can quickly disturb the indoor air. Specifically, the heat exchanger fan is increased from the first speed to the second speed, and the second speed is higher than the first speed, so as to improve the flow of the indoor air and thereby promote the release of formaldehyde.

[0116] When the heat exchange fan is raised from the first speed to the second speed, the temperature sensor is turned on to detect the indoor temperature.

[0117] When the indoor temperature is not lower than the first preset temperature, the indoor heat exchanger is not turned on to run. At this time, the indoor temperature is relatively high, which can promote the release of formaldehyde in the furniture into the air. At this time, the indoor heat exchanger is not used as a condenser, which can promote the release of formaldehyde into the air while saving the energy consumption of the air conditioner indoor unit.

[0118] When the indoor temperature is lower than the first preset temperature, the indoor heat exchanger is turned on to run as a condenser.

[0119] When the indoor heat exchanger runs as a condenser for a first preset time, the indoor temperature is detected. When it is detected that the indoor temperature is lower than the first preset temperature, it indicates that the heating capacity of the indoor heat exchanger is insufficient at this time, and the electric heating device is controlled to be turned on to rapidly warm the indoor air.

[0120] In some embodiments, the air conditioner indoor unit further comprises a humidifier, the humidifier is arranged in the shell, and the humidifier is used to generate steam to be discharged from the shell to the indoor space through the heat exchange air outlet.

[0121] The controller is configured to: when the electric heating device is turned on for a first duration, turn on the indoor humidity sensor to detect the indoor humidity, and determine whether the indoor humidity is lower than a first preset humidity.

[0122] When the electric heating device is turned on for a first duration, the indoor humidity sensor remains in an open state, and when it is detected that the indoor humidity is not lower than the first preset humidity, the controller controls the humidifier not to be turned on.

[0123] When it is detected that the indoor humidity is lower than the first preset humidity, the controller controls the humidifier to be turned on to humidify the indoor air, and the steam generated by the humidifier is discharged into the indoor space through the heat exchange air outlet, so that the indoor temperature and humidity reach the temperature and humidity that promote the rapid release of formaldehyde in the indoor wooden material.

[0124] In some embodiments, when the indoor heat exchanger runs as a condenser for a first preset time, the indoor temperature is detected. When it is detected that the indoor temperature is not lower than the first preset temperature, it indicates that the heating capacity of the indoor heat exchanger is sufficient to meet the indoor temperature rising demand at this time, and the indoor heat exchanger is controlled to run for a second preset time, so that the indoor heat exchanger continues to warm the indoor temperature. After the indoor heat exchanger runs for the second preset time, the indoor humidity sensor is turned on to detect the indoor humidity.

[0125] When the indoor heat exchanger runs for the second preset time, the indoor humidity sensor remains in an open state, and when it is detected that the indoor humidity is not lower than the first preset humidity, the controller controls the humidifier not to be turned on.

[0126] When the indoor humidity is detected to be lower than the first preset humidity, the controller controls to turn on the humidifier to humidify the indoor air, and the steam generated by the humidifier is discharged to the indoor space through the heat exchange air outlet, so that the indoor temperature and humidity reach the temperature and humidity for promoting the rapid release of formaldehyde of the indoor wooden material.

[0127] When the indoor formaldehyde concentration is detected to be higher than the first preset concentration, the outdoor air inlet is opened to introduce fresh air into the room. The fresh air fan runs at high speed to quickly discharge the indoor air rich in high-concentration formaldehyde to the outdoor.

[0128] The first preset concentration is the concentration when the release of formaldehyde reaches an equilibrium state. When the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuates within a preset fluctuation range within a set time, and the preset fluctuation range can be set to 0.001 mg / m 3 .

[0129] When the indoor formaldehyde concentration in the indoor air decreases to be lower than the second preset concentration, it can also be set that if the electric heating device is in an open state under the condition that the indoor formaldehyde concentration remains below the second preset concentration within the second preset time, the controller controls to close the electric heating device, controls the indoor heat exchanger to stop running, and the heat exchange fan is switched to a medium speed state, that is, the heat exchange fan rotates at a reduced speed to run at the first speed, and the fresh air fan stops rotating and the humidifier stops humidifying. Thus, when the indoor formaldehyde concentration decreases to be lower than the second preset concentration, one de-aldehyde cycle ends, and at this time, the temperature rise in the room is stopped to save energy, and the next de-aldehyde cycle is waited to run.

[0130] The second preset concentration can be a safe concentration of formaldehyde, which can be a national safety standard value of formaldehyde. When the indoor formaldehyde concentration is lower than the second preset concentration, the indoor formaldehyde concentration is within the safe concentration range of the human body.

[0131] After the de-aldehyde cycle ends, the air conditioner indoor unit keeps running for a third preset time, and then the indoor humidity is detected by the indoor humidity sensor. When the indoor humidity is higher than the second preset humidity, the controller controls to start a dehumidification mode to run a dehumidification program. The indoor heat exchanger is used as an evaporator to dehumidify the indoor air to prevent the indoor air humidity from being too large to cause corrosion or short circuit of electrical devices in the room. The second preset humidity is less than the first preset humidity. When the indoor humidity decreases to be not higher than the second preset humidity, the controller controls the dehumidification mode to stop running. At this time, the indoor humidity is low and meets the preset requirement, and the indoor humidity will not cause corrosion or short circuit of electrical devices in the room. When the dehumidification mode ends, the next de-aldehyde cycle starts.

[0132] At the end of the formaldehyde removal cycle, the indoor unit of the air conditioner continues to run for the third preset time. Then, the indoor humidity sensor detects the indoor humidity. If the indoor humidity is not higher than the second preset humidity, the dehumidification mode will not activate. This indicates that the indoor humidity is low enough to meet the preset requirements, and the humidity will not cause corrosion or short circuits to electrical components in the room. When the dehumidification mode ends, the next formaldehyde removal cycle begins.

[0133] When the indoor formaldehyde concentration drops below the second preset concentration, or can be set to remain below the second preset concentration for a second preset time, if the electric heating device is not turned on, the indoor heat exchanger will not function as a condenser and will stop heating. The heat exchange fan will switch to medium speed (i.e., the heat exchange fan will reduce its speed and run at the first speed), the fresh air fan will stop rotating, and the humidifier will stop humidifying. At this point, one formaldehyde removal cycle is complete, and stopping the increase in indoor temperature saves energy.

[0134] At the end of the formaldehyde removal cycle, the indoor unit of the air conditioner continues to run for the third preset time. Then, the indoor humidity sensor detects the indoor humidity. When the indoor humidity is higher than the second preset humidity, the controller activates the dehumidification mode. The indoor heat exchanger acts as an evaporator to dehumidify the indoor air, preventing corrosion or short circuits of electrical components due to excessive humidity. The second preset humidity is lower than the first preset humidity. When the indoor humidity drops to no higher than the second preset humidity, the controller stops the dehumidification mode. At this point, the indoor humidity is low enough to meet the preset requirements, and the humidity will not cause corrosion or short circuits to electrical components. When the dehumidification mode ends, the next formaldehyde removal cycle begins.

[0135] At the end of the formaldehyde removal cycle, the indoor unit of the air conditioner continues to run for the third preset time. Then, the indoor humidity sensor detects the indoor humidity. If the indoor humidity is not higher than the second preset humidity, the dehumidification mode will not activate. This indicates that the indoor humidity is low enough to meet the preset requirements, and the humidity will not cause corrosion or short circuits to electrical components in the room. When the dehumidification mode ends, the next formaldehyde removal cycle begins.

[0136] The formaldehyde removal cycle is a continuous process. After one formaldehyde removal cycle is completed, the indoor temperature sensor and indoor humidity sensor are turned off, while the indoor formaldehyde concentration sensor remains on. When the indoor formaldehyde temperature is detected to be higher than the third preset concentration again, the controller will restart the formaldehyde removal cycle.

[0137] When the air conditioner is running in dehumidification mode, it uses the compressor, outdoor heat exchanger, expansion valve and indoor heat exchanger to perform the dehumidification cycle of the indoor unit.

[0138] 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 to the indoor space through the heat absorption process of the refrigerant to achieve temperature adjustment of the indoor space.

[0139] 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.

[0140] The expansion valve expands the high-temperature and high-pressure state liquid phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid phase refrigerant.

[0141] 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 heat exchanging with indoor air using the latent heat of evaporation of the refrigerant.

[0142] In the entire dehumidification cycle, the air conditioner indoor unit can condense the moisture in the indoor air into condensed water, thereby reducing the indoor humidity.

[0143] In some embodiments, when the controller receives a stop de-aldehyde command, regardless of whether the de-aldehyde cycle is in an unfinished state, the controller controls the new air fan to be turned off and the humidifier to be turned off after one de-aldehyde cycle is completed, thereby ensuring the de-aldehyde efficiency of indoor formaldehyde and ensuring that the indoor formaldehyde concentration is reduced to below the second preset concentration, to avoid the harm of high formaldehyde concentration to the human body.

[0144] In some embodiments, when the de-aldehyde cycle is running, if the power is suddenly cut off in the middle, the cloud server of the air conditioner indoor unit records the running state of each component of the air conditioner indoor unit at this time, and when the power is restored again, each component of the air conditioner operates according to the running state before the power is cut off.

[0145] When one of the sensors on the indoor unit of the air conditioner malfunctions, such as the indoor temperature sensor, indoor humidity sensor, or formaldehyde concentration sensor, preventing timely acquisition of indoor air quality, the controller activates the emergency formaldehyde removal mode. After the indoor heat exchanger functions as a condenser for a second period, the humidifier is activated. After the humidifier runs for a third period, the fresh air fan is activated. After the fresh air fan runs for a fourth period, the controller issues a warning to remind the user to shut down the formaldehyde removal cycle. If the user does not shut down the formaldehyde removal cycle after the warning, the indoor unit continues to operate in emergency formaldehyde removal mode to prevent issues such as excessively high indoor temperature or humidity, leading to high formaldehyde concentrations that could affect formaldehyde removal efficiency and increase energy consumption. The second, third, and fourth periods can be set to 30 minutes each.

[0146] Among them, the abnormal situation of a certain sensor includes: the controller does not receive feedback electrical signal from a certain sensor, or the feedback electrical signal is significantly abnormal, and the electrical signal suddenly changes from strong to weak instead of a gradual change. These situations can all be understood as a sensor abnormality.

[0147] See Figures 4-15 In some embodiments, the indoor unit of the air conditioner also includes a window opener for controlling the opening or closing of windows.

[0148] The controller is configured to: when the indoor temperature is lower than a first preset temperature, use the indoor heat exchanger as a condenser to heat the indoor air; when the indoor temperature is detected to be not lower than the first preset temperature, detect the indoor humidity; when the indoor humidity is not lower than the first preset humidity, control the indoor heat exchanger to use it as a condenser for a first time period to detect the indoor formaldehyde concentration; when the indoor formaldehyde concentration is detected to be higher than the first preset concentration, detect the outdoor particulate matter concentration; when the outdoor particulate matter concentration is detected to be lower than the first particulate matter concentration, open the window; when the outdoor particulate matter concentration is detected to be not lower than the first particulate matter concentration, close the window.

[0149] In this embodiment, when the indoor temperature is low, the indoor heat exchanger is used as a condenser to heat the temperature of the indoor air. When it is detected that the indoor temperature is not lower than the first preset temperature, it indicates that the indoor temperature has been raised to promote the release of formaldehyde in the furniture at this time. At this time, the indoor humidity sensor is turned on to detect the indoor humidity. When it is detected that the indoor humidity is not lower than the first preset humidity, it indicates that the indoor environment is high temperature and high humidity at this time, and the formaldehyde in the furniture can be promoted to release into the indoor air in the high temperature and high humidity environment. When it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, it indicates that the indoor formaldehyde concentration is high at this time to reach an equilibrium state, and fresh air needs to be introduced into the indoor to dilute the indoor formaldehyde concentration, while the formaldehyde is squeezed out of the indoor. The outdoor air quality is detected by detecting the outdoor particulate matter concentration, and when it is detected that the outdoor particulate matter concentration is lower than the first particulate matter concentration, it indicates that the outdoor air quality is high at this time, and the controller controls the window opener to open the window, so as to introduce outdoor fresh air into the indoor, and the formaldehyde in the indoor air is discharged to the outdoor through the window.

[0150] When it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, it indicates that the outdoor particulate matter concentration is high at this time, and the controller controls the window opener to keep the window closed, so as to prevent the outdoor particulate matter from entering the indoor and avoid introducing other pollutants into the indoor. It can be provided that the outdoor particulate matter is PM2.5, and the outdoor particulate matter concentration is detected by a PM2.5 sensor.

[0151] In some embodiments, when the controller receives a command to start the formaldehyde removal mode, the human sensing sensor is turned on to detect whether there is a person in the indoor.

[0152] When the human sensing sensor detects that there is a person in the indoor, the indoor unit of the air conditioner is controlled to issue a prompt to remind the user to leave the indoor within a preset time. After the prompt is issued for a preset time, the human sensing sensor is controlled to detect whether there is a person in the indoor again. When it is detected that there is no person in the indoor, the controller controls the window opener to close the window, and the controller controls to perform a formaldehyde removal cycle. The way in which the indoor unit of the air conditioner issues a prompt includes that the indoor unit of the air conditioner issues a voice prompt or the indoor unit of the air conditioner issues a prompt through its control software. The preset time can be set to five minutes.

[0153] A formaldehyde removal cycle includes that at the start of the formaldehyde removal cycle, the indoor heat exchanger is not started to run, and the heat exchanger fan is controlled to be started to run for a first disturbance time with a first speed. At the same time, the indoor air is disturbed by the reciprocating swing of the indoor air deflector, so as to enhance the air flow speed of the indoor air and the surface of the wooden furniture, and then promote the release of formaldehyde.

[0154] The first disturbance time can be determined according to the ratio of the rated air volume of the heat exchanger fan and the indoor space. It can be provided that the first disturbance time of the cabinet type indoor unit of the air conditioner can be set to five minutes, and the first disturbance time of the wall-mounted indoor unit of the air conditioner can be set to three minutes.

[0155] After the heat exchange fan runs at the first speed for the first disturbance time, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is higher than the third preset concentration, the controller controls the speed of the heat exchange fan to be increased, that is, the speed of the heat exchange fan is switched from the medium speed to the high speed, so that the indoor air is disturbed quickly. After the speed of the heat exchange fan is increased, the inner guide vane stops reciprocating swing at this time, and the inner guide vane rotates to the minimum wind blocking position, so as to reduce the resistance of the inner guide vane to the indoor air flowing out of the heat exchange air outlet and improve the air volume of the indoor air flowing out of the heat exchange air outlet.

[0156] When the inner guide vane rotates to the minimum wind blocking position during the de-aldehyde cycle, the outer guide vane is switched to the long-distance air supply position. When the de-aldehyde cycle is running, the inner guide vane of the heat exchange air outlet of the air conditioner and the guide vane of the fresh air outlet are all at the minimum wind blocking position, so as to reduce the resistance to air flow, improve the air supply distance, and strengthen the disturbance effect of the indoor air.

[0157] In some embodiments, after the controller of the air conditioner indoor unit receives the command to start the de-aldehyde mode, the formaldehyde concentration sensor detects the initial indoor formaldehyde concentration at this time, and the third preset concentration can be set as a multiple of the initial indoor formaldehyde concentration. It can be set that the third preset concentration is set as twice the initial indoor formaldehyde concentration. That is, when it is detected that the indoor formaldehyde concentration is higher than twice the initial indoor formaldehyde concentration, it means that a large amount of formaldehyde is released from the furniture and home decoration into the indoor air at this time. At this time, increasing the speed of the heat exchange fan can quickly disturb the indoor air. Specifically, the heat exchange fan is increased from the first speed to the second speed, and the second speed is higher than the first speed, so as to improve the flow of indoor air and promote the release of formaldehyde.

[0158] When the speed of the heat exchange fan is increased from the first speed to the second speed, the temperature sensor is turned on to detect the indoor temperature.

[0159] When the indoor temperature is not lower than the first preset temperature, the indoor heat exchanger is not started to run, and the heat exchange fan runs at the second speed. At this time, the indoor temperature is relatively high, which can promote the release of formaldehyde in the furniture into the air. At this time, the indoor heat exchanger does not need to be used as a condenser, which can promote the release of formaldehyde into the air while saving the energy consumption of the air conditioner indoor unit.

[0160] When the indoor temperature is lower than the first preset temperature, it means that the heating capacity of the indoor heat exchanger is insufficient at this time, and the indoor heat exchanger is started to run as a condenser. The indoor heat exchanger is started to run at the maximum power to heat and warm up the indoor air.

[0161] When the indoor temperature is not lower than the first preset temperature, it means that the indoor heat exchanger heats the indoor temperature to a temperature that promotes the release of formaldehyde in the furniture at this time. At this time, the indoor humidity sensor is turned on to detect the indoor humidity.

[0162] When it is detected that the indoor humidity is not lower than the first preset humidity, the controller controls the humidifier not to be turned on. The humidity sensor detects the indoor humidity in real time, and when the indoor humidity decreases to be lower than the first preset humidity, the humidifier is turned on.

[0163] When it is detected that the indoor humidity is lower than the first preset humidity, the controller controls the humidifier to be turned on to humidify the indoor air, and the steam generated by the humidifier is discharged to the indoor space through the heat exchange air outlet, so that the indoor temperature and humidity reach the temperature and humidity for promoting the rapid release of formaldehyde of the indoor wooden material.

[0164] When the indoor humidity is not lower than the first preset temperature, the indoor humidity is not lower than the first preset humidity, and the indoor heat exchanger and the heat exchange fan remain in the current running state for a period of time, the formaldehyde concentration sensor is turned on to detect the indoor formaldehyde concentration, and the period of time can be set to sixty minutes. When the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor particulate matter concentration is detected, and when it is detected that the outdoor particulate matter concentration is lower than the first particulate matter concentration, it indicates that the outdoor air quality is high at this time, and the controller controls the window opening machine to open the window, so as to introduce outdoor fresh air into the indoor, and the formaldehyde in the indoor air is discharged to the outdoor through the window. When it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, it indicates that the outdoor particulate matter concentration is high at this time, and the controller controls the window opening machine to keep the window closed, so as to prevent the outdoor particulate matter from entering the indoor and avoid introducing other pollutants into the indoor.

[0165] The first preset concentration is the concentration when the release of formaldehyde reaches an equilibrium state, and the setting can be that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuates within a preset fluctuation range within a set time, and the preset fluctuation range can be set to 0.001 mg / m 3 .

[0166] Referring to Figure 12 In some embodiments, the air conditioner indoor unit is not provided with an aldehyde removal module, and is also not provided with a fresh air fan.

[0167] When the window is opened and it is detected that the indoor formaldehyde concentration is lower than the second preset concentration, the setting can be that when the indoor formaldehyde concentration is kept lower than the second preset concentration within a period of time, the period of time can be set to five minutes, the controller controls the heat exchange fan to reduce the rotating speed, controls the indoor heat exchanger to stop running, controls the humidifier to be turned on and run at the first power, and controls the window opening machine to close the window, and at this time, one aldehyde removal cycle ends. The setting can be that the second preset concentration can be set to 0.08 g / m 3The first power is 60% of the rated power of the humidifier. Because if the humidifier is turned off at this time, the indoor humidity will quickly decrease, and by the time the next aldehyde removal cycle starts, the indoor humidity cannot quickly rise, which will prolong the duration of the aldehyde removal cycle, resulting in reduced aldehyde removal efficiency and increased air conditioning energy consumption. Therefore, running the humidifier at a first power lower than the rated power can avoid the decrease in indoor humidity.

[0168] When the window is closed and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that when the indoor formaldehyde concentration remains lower than the second preset concentration for a period of time, which can be set to five minutes, the control of the heat exchange fan speed is reduced, the indoor heat exchanger is stopped, and the humidifier is turned off. At this time, an aldehyde removal cycle ends. Since the window is closed at this time, the indoor humidity fluctuates less, so turning off the humidifier can also keep the indoor humidity change small, and closing the humidifier can also save energy.

[0169] When the indoor air formaldehyde concentration does not decrease to below the second preset concentration, the indoor heat exchanger is used as an evaporator, the air conditioner indoor unit is switched from heating mode to dehumidifying mode, and the heat exchange fan runs at high speed to make the indoor high-concentration formaldehyde gas enter the shell, flow through the indoor heat exchanger, and make the formaldehyde dissolve in the condensed water condensed by the water vapor, and then be discharged to the outdoor through the drain pipe, thereby improving the indoor aldehyde removal effect.

[0170] Referring to Figure 13 In some embodiments, an indoor heat exchanger is provided with an aldehyde removal module, and a fresh air fan is not provided. The aldehyde removal module is used to remove formaldehyde in indoor air. The ways in which the aldehyde removal module removes formaldehyde in indoor air include but are not limited to physical adsorption (such as activated carbon adsorption material), chemical bonding (such as potassium permanganate chemical reaction), catalytic oxidation (such as photocatalyst catalysis, normal temperature catalyst catalysis, and high temperature catalyst catalysis), and other technical means.

[0171] When it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, the controller controls the window opening machine to keep the window closed, and turns on the aldehyde removal module to make the indoor air flow through the aldehyde removal module. The aldehyde removal module is used to remove formaldehyde in indoor air to purify indoor air and prevent outdoor pollutants from entering the indoor.

[0172] When the window is opened and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that when the indoor formaldehyde concentration remains lower than the second preset concentration for a period of time, which can be set to five minutes, the controller controls the heat exchange fan speed to be reduced, the indoor heat exchanger to be stopped, the humidifier to be turned on and run at the first power, and the window opening machine to close the window. At this time, an aldehyde removal cycle ends. It can be set that the second preset concentration can be set to 0.08 g / m 3The first power is 60% of the rated power of the humidifier. Because if the humidifier is closed at this time, the indoor humidity quickly decreases, and when the next aldehyde removal cycle starts, the indoor humidity cannot quickly increase, which will prolong the duration of the aldehyde removal cycle, reduce the aldehyde removal efficiency, and increase the energy consumption of the air conditioner. Therefore, the humidifier is operated at a first power lower than the rated power, which can avoid the decrease of the indoor humidity.

[0173] When the window is closed and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, the control can be set as follows: when the indoor formaldehyde concentration is kept lower than the second preset concentration for a period of time, which can be set as five minutes, the control reduces the rotation speed of the heat exchange fan, stops the operation of the indoor heat exchanger, closes the humidifier, and closes the aldehyde removal module. At this time, one aldehyde removal cycle ends. Since the window is closed at this time, the indoor humidity fluctuates less, so the control of closing the humidifier can also keep the change of the indoor humidity small, and closing the humidifier can also save energy.

[0174] After one aldehyde removal cycle ends, if the controller does not receive a command to close the aldehyde removal mode, the next aldehyde removal cycle is immediately started.

[0175] When the controller receives a command to close the aldehyde removal mode during one aldehyde removal cycle, if it is detected that the window is in an open state at this time, the controller controls the window closer to close the window, so as to avoid the situation that the aldehyde removal cycle has not ended when a sudden change in outdoor weather, i.e., it is about to rain, and prevent the situation that the storm blows into the room.

[0176] When the controller receives a command to close the aldehyde removal mode during one aldehyde removal cycle, the controller simultaneously controls the aldehyde removal module to switch from the closed state to the open state, the operation states of the indoor heat exchanger and the heat exchange fan remain unchanged, and the operation state of the humidifier remains unchanged.

[0177] When one aldehyde removal cycle ends, the controller controls the humidifier to be closed, the indoor unit of the air conditioner is switched from the heating mode to the dehumidifying mode, and the indoor heat exchanger is used as an evaporator. The indoor humidity sensor detects the indoor humidity in real time, and when the indoor humidity decreases to be lower than the second preset humidity or when the air conditioner has been running in the dehumidifying mode for a period of time, the indoor heat exchanger and the heat exchange fan stop running. The period of time can be set as thirty minutes, so as to decrease the indoor air humidity and prevent the indoor humidity from being too large to affect the internal elements of some electrical appliances in the room.

[0178] When it is detected that the window is in a closed state, the controller controls the shielding of the instructions from the user, and when one aldehyde removal cycle ends, the controller controls the humidifier to be closed.

[0179] When the indoor air conditioner is switched from the heating mode to the dehumidifying mode, and the indoor humidity is detected to be lower than the second preset humidity, the controller controls the indoor heat exchanger and the heat exchanger fan to stop running.

[0180] When an aldehyde removal cycle ends and the controller receives a command to turn off the aldehyde removal mode, the controller controls the humidifier to turn off, controls the aldehyde removal module to turn off, controls the window closing device to close the window, switches the indoor heat exchanger from the heating mode to the dehumidifying mode, and controls the indoor air conditioner to stop running after the dehumidifying mode runs for a period of time, which can be set to thirty minutes.

[0181] Referring to Figure 14 In some embodiments, the indoor air conditioner is provided with a fresh air fan and is not provided with an aldehyde removal module. The fresh air fan is arranged in the shell and is used to deliver outdoor fresh air to the indoor.

[0182] When the outdoor particulate matter concentration is detected to be not lower than the first particulate matter concentration, the controller controls the window opening and closing device to keep the window closed and controls the fresh air fan to be turned on to drive outdoor air into the indoor, thereby reducing the indoor formaldehyde concentration and causing the indoor formaldehyde gas to be discharged to the outdoor through the gap under the indoor slight positive pressure. Meanwhile, closing the window can prevent outdoor pollutants from entering the indoor.

[0183] When the controller receives a command to turn off the aldehyde removal mode during an aldehyde removal cycle, if the window is detected to be in the open state, the controller controls the window closing device to close the window, thereby preventing the occurrence of the situation that a storm enters the indoor when the aldehyde removal cycle has not ended and the outdoor weather suddenly changes, i.e., it is about to rain.

[0184] When the controller receives a command to turn off the aldehyde removal mode during an aldehyde removal cycle, the controller simultaneously controls the fresh air fan to be switched from the closed state to the open state. The fresh air fan runs to drive outdoor air into the indoor. The running states of the indoor heat exchanger and the heat exchanger fan remain unchanged, and the running state of the humidifier remains unchanged.

[0185] When an aldehyde removal cycle ends, the controller controls the humidifier to turn off, the indoor air conditioner is switched from the heating mode to the dehumidifying mode, and the indoor heat exchanger is used as an evaporator. The indoor humidity sensor detects the indoor humidity in real time. When the indoor humidity is detected to be lower than the second preset humidity or when the indoor air conditioner runs in the dehumidifying mode for a period of time, the indoor heat exchanger and the heat exchanger fan stop running. The period of time can be set to thirty minutes, so as to reduce the indoor air humidity and prevent the indoor humidity from being too large to affect the internal elements of some electrical appliances in the indoor.

[0186] When the window is detected to be in the closed state, the controller controls the shielding of the instructions from the user. When an aldehyde removal cycle ends, the controller controls the humidifier to turn off.

[0187] After the air conditioner indoor unit is switched from the heating mode to the dehumidifying mode, when it is detected that the indoor humidity decreases to be lower than the second preset humidity, the controller controls the indoor heat exchanger and the heat exchanger fan to stop running.

[0188] When one aldehyde removal cycle ends and the controller receives a command to close the aldehyde removal mode, the controller controls the humidifier to close, controls the fresh air fan to close, controls the window closing machine to close the window, switches the indoor heat exchanger from the heating mode to the dehumidifying mode, and after the dehumidifying mode runs for a period of time, which can be set to thirty minutes, the air conditioner indoor unit stops running.

[0189] Referring to Figure 15 In some embodiments, the air conditioner indoor unit is provided with both the aldehyde removal module and the fresh air fan.

[0190] When it is detected that the outdoor particulate matter concentration is not lower than the first particulate matter concentration, the controller controls the window opening machine to keep the window closed, and simultaneously controls the aldehyde removal module and the fresh air fan to open, so that the indoor air enters the shell to flow through the aldehyde removal module, and after passing through the aldehyde removal module, the indoor air removes the formaldehyde in the indoor air, so as to purify the indoor air, and the purified air flows out to the indoor through the heat exchange air outlet. At the same time, the fresh air fan rotates to drive outdoor air into the indoor, so as to reduce the indoor formaldehyde concentration, and in the case of indoor micro-positive pressure, the indoor formaldehyde gas is discharged to the outdoor through the gap. It can be provided that the shell is provided with a filter screen, and the filter screen is used to filter the particulate matter in the outdoor air driven by the fresh air fan, so as to prevent the outdoor particulate matter from entering the indoor.

[0191] When the window is opened, and it is detected that the indoor formaldehyde concentration is lower than the second preset concentration, it can be provided that when the indoor formaldehyde concentration remains lower than the second preset concentration for a period of time, which can be set to five minutes, the controller controls the heat exchange fan to reduce the rotating speed, controls the indoor heat exchanger to stop running, controls the humidifier to run at the first power, and controls the window closing machine to close the window, at this time, one aldehyde removal cycle ends. It can be provided that the second preset concentration can be set to 0.08 g / m 3 The first power is 60% of the rated power of the humidifier. Because if the humidifier is closed at this time, the indoor humidity rapidly decreases, and when the next aldehyde removal cycle starts, the indoor humidity cannot rapidly increase, which will prolong the duration of the aldehyde removal cycle, reduce the aldehyde removal efficiency, and increase the air conditioner energy consumption. Therefore, running the humidifier at the first power lower than the rated power can avoid the decrease of the indoor humidity.

[0192] When the window is closed and the indoor formaldehyde concentration is detected to be below the second preset concentration, the system can be configured to maintain this concentration for a period of time (e.g., five minutes). During this time, the system will control the heat exchange fan speed to decrease, the indoor heat exchanger to stop operating, the humidifier to turn off, the formaldehyde removal module to turn off, and the fresh air fan to stop rotating. This completes one formaldehyde removal cycle. Since the window is closed and indoor humidity fluctuations are minimal, turning off the humidifier also helps maintain low humidity levels and saves energy.

[0193] If the controller does not receive a command to turn off the formaldehyde removal mode after a formaldehyde removal cycle ends, it will immediately start the next formaldehyde removal cycle.

[0194] In some embodiments, when the controller receives a command to turn off the formaldehyde removal mode during a formaldehyde removal cycle, if it detects that the window is open at this time, the controller controls the window closer to close the window, thereby preventing storms from entering the room before the formaldehyde removal cycle is finished in the event of a sudden change in outdoor weather or an impending rain.

[0195] When the controller receives a command to turn off the formaldehyde removal mode during a formaldehyde removal cycle, it simultaneously controls the formaldehyde removal module to switch from the off state to the on state, increases the speed of the fresh air fan, and keeps the operating status of the indoor heat exchanger and heat exchange fan unchanged, while keeping the operating status of the humidifier unchanged.

[0196] When a formaldehyde removal cycle ends, the controller shuts off the humidifier, and the indoor unit switches from heating mode to dehumidification mode, with the indoor heat exchanger acting as an evaporator. An indoor humidity sensor monitors the indoor humidity in real time. When the indoor humidity drops below a second preset level, or after the air conditioner has been running in dehumidification mode for a period of time, the indoor heat exchanger and heat exchange fan stop operating. This set period can be set to thirty minutes to lower the indoor humidity and prevent excessive humidity from affecting the internal components of certain electrical appliances.

[0197] When the window is detected to be closed, the controller blocks commands from the user. When a formaldehyde removal cycle is completed, the controller turns off the humidifier.

[0198] After the indoor unit of the air conditioner switches from heating mode to dehumidification mode, when it detects that the indoor humidity has dropped below the second preset humidity, the controller controls the indoor heat exchanger and heat exchange fan to stop running.

[0199] When the aldehyde removal cycle ends, the controller receives a command to turn off the aldehyde removal mode, the controller controls the humidifier to turn off, controls the aldehyde removal module to turn off, controls the fresh air fan to stop running, controls the window machine to close the window, the indoor heat exchanger is switched from the heating mode to the dehumidification mode, and the dehumidification mode runs for a period of time, wherein the period of time can be set to thirty minutes, and the air conditioner indoor unit stops running.

[0200] Referring to Figures 1-3 In some embodiments, the air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit 200, the air conditioner outdoor unit 200 is provided with an outdoor heat exchanger, and the refrigerant flows between the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange.

[0201] 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 are not to be construed as limiting the present application, and those of ordinary skill 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 indoor unit for an air conditioner, characterized in that, It includes: The casing has a heat exchange air outlet; An indoor heat exchanger is a device that uses refrigerant flowing inside to exchange heat with indoor air to form a heating or cooling cycle. An electric heating device is disposed inside the housing and is used to heat indoor air so that it flows into the room through the heat exchange outlet; A fresh air fan is installed inside the housing and is used to deliver fresh outdoor air to the room. A formaldehyde concentration sensor, which is located inside the housing, is used to detect indoor formaldehyde concentration; The controller is configured as follows: When the indoor temperature is lower than the first preset temperature, the indoor heat exchanger is used as a condenser; When the indoor heat exchanger is used as a condenser for a first preset time, and the indoor temperature is detected to be lower than the first preset temperature, the electric heating device is controlled to be turned on. When the indoor formaldehyde concentration is detected to be higher than the first preset concentration, the fresh air fan is turned on to introduce fresh air into the room. When the indoor formaldehyde concentration is detected to be lower than the second preset concentration, the electric heating device is turned off and the indoor heat exchanger is stopped from operating, provided that the first preset concentration is higher than the second preset concentration. It also includes: a humidifier disposed within the housing, the humidifier being used to generate steam to flow into the room; The controller is configured to detect indoor humidity after the electric heating device has been turned on for a first period of time. When the indoor humidity is lower than the first preset humidity, the humidifier is turned on. When the indoor humidity is not lower than the first preset humidity, the humidifier is turned off. When the controller controls the emergency formaldehyde removal mode, the indoor heat exchanger is used as a condenser for a second period of time before the humidifier is turned on; after the humidifier has been running for a third period of time, the fresh air fan is turned on; after the fresh air fan has been running for a fourth period of time, the controller issues a warning reminder.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: Human presence sensor, used to detect whether there are people indoors; The controller is configured to: when the human sensor detects someone in the room, control the indoor unit of the air conditioner to issue a prompt; after a preset time after the prompt is issued, control the human sensor to detect whether there is anyone in the room.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, Also includes: A heat exchange fan is disposed inside the housing, and the heat exchange fan is used to deliver indoor air to the room through the heat exchange air outlet; The controller is configured to: when the human sensor detects that no one is in the room, control the indoor heat exchanger to stop running and control the heat exchange fan to run at a first speed for a first disturbance time; When the indoor formaldehyde concentration is detected to be higher than the third preset concentration, the speed of the heat exchange fan is controlled to increase.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The controller is configured such that the indoor heat exchanger does not start operation when the indoor temperature is not lower than a first preset temperature.

5. An indoor unit for an air conditioner, characterized in that, include: The casing has a heat exchange air outlet; An indoor heat exchanger is a device in which the refrigerant flowing inside exchanges heat with the air to form a heating or cooling cycle. A window opener is used to control the opening or closing of windows; A formaldehyde concentration sensor, which is located inside the housing, is used to detect indoor formaldehyde concentration; A heat exchange fan is disposed inside the housing and is used to deliver indoor air to the room through the heat exchange outlet. A humidifier, disposed within the housing, for generating steam to flow into the room; The controller is configured as follows: When the indoor temperature is lower than the first preset temperature, the indoor heat exchanger acts as a condenser to heat the indoor air; when the indoor temperature is detected to be not lower than the first preset temperature, the indoor humidity is detected. When the indoor humidity is not lower than the first preset humidity, the indoor heat exchanger is controlled to be used as a condenser to run for a first time period, and the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is detected to be higher than the first preset concentration, the outdoor particulate matter concentration is then detected. When the outdoor particulate matter concentration is detected to be lower than the first particulate matter concentration, the window opener opens the window; When the outdoor particulate matter concentration is detected to be not lower than the first particulate matter concentration, the window opener closes the window; When the window is opened and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, the speed of the heat exchange fan is reduced, the indoor heat exchanger is stopped, the humidifier is turned on to operate at the first power, and the window opener is turned on to close the window.

6. The indoor unit of the air conditioner according to claim 5, characterized in that, Also includes: A formaldehyde removal module is disposed within the housing and is used to remove formaldehyde from indoor air. The controller is configured to: when the outdoor particulate matter concentration is detected to be not lower than the first particulate matter concentration, the window opener closes the window and the formaldehyde removal module is activated; When the window is closed and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, the speed of the heat exchange fan is reduced, the indoor heat exchanger is stopped, and the humidifier is turned off.

7. The indoor unit of the air conditioner according to claim 6, characterized in that, It also includes: a fresh air fan, which is disposed within the housing, the fresh air fan being used to deliver outdoor fresh air to the room; The controller is configured such that when the outdoor particulate matter concentration is detected to be not lower than a first particulate matter concentration, the window opener closes the window and the fresh air fan turns on to introduce fresh air into the room.

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