Indoor unit of air conditioner

Abstract

The invention relates to an air conditioner indoor unit which comprises a shell. An indoor heat exchanger; an electric heating device; a fresh air fan; the formaldehyde concentration sensor is arranged in the shell and is used for detecting the indoor formaldehyde concentration; the controller is configured as follows: when the indoor temperature is lower than a first preset temperature, the indoor heat exchanger is used as a condenser; after the indoor heat exchanger is used as a condenser and runs for a first preset time, when it is detected that the indoor temperature is lower than a first preset temperature, the electric heating device is controlled to be started; when it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, the fresh air fan is controlled to be started so as to introduce fresh air into a room; and when it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, the electric heating device is controlled to be closed, 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 release and formaldehyde removal effects are improved.

Description

Technical Field

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

[0002] At present, with the improvement of people's quality of life and living standards, health has become an increasingly important factor in the family scene. For the home appliance market, more and more home appliances are developing around the theme of "health". Formaldehyde has become the number one killer affecting the health of family scenes, and more and more users are beginning to look for reliable and effective ways to remove formaldehyde. As a primary carcinogen, formaldehyde mainly exists in two forms indoors. The formaldehyde in furniture panels is bound formaldehyde, and the formaldehyde in indoor air is free formaldehyde. The bound formaldehyde in furniture panels will gradually be released into the air at room temperature, continuously increasing the content of free formaldehyde in the air, exacerbating the threat to human health. At present, there is no mature technology that can completely remove the formaldehyde contained in furniture panels in a short period of time.

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

[0004] The indoor unit of the air conditioner includes a housing, an indoor heat exchanger and a formaldehyde removal filter. The housing is provided with a heat exchange outlet. The indoor heat exchanger is arranged inside the housing. The refrigerant flowing inside the housing exchanges heat with the indoor air to form a heating cycle or a cooling cycle. After the heat exchange, the indoor air flows to the outside of the housing through the heat exchange outlet. The formaldehyde removal filter is used to absorb formaldehyde in the indoor air. The formaldehyde removal filter has a service life and needs to be replaced frequently.

[0005] Some air conditioner indoor units also include an electric heating device, which is used to increase the indoor temperature during heating, but it is not disclosed that the electric heating device is used in conjunction with an indoor heat exchanger to remove formaldehyde.

[0006] In the related art, formaldehyde gas in the indoor air is removed by passing indoor air through a formaldehyde removal filter. However, formaldehyde is currently removed through the indoor unit of the air conditioner. The method of removing formaldehyde is single, the efficiency of formaldehyde removal is low, and the formaldehyde removal module needs to be replaced frequently. It is impossible to implement different formaldehyde removal methods for different indoor temperatures and indoor humidity. Summary of the invention

[0007] The present invention solves one of the technical problems in the related art at least to a certain extent.

[0008] To this end, the present application aims to provide an air-conditioning indoor unit so as to increase the indoor temperature when the heating capacity of the indoor heat exchanger is insufficient, thereby ensuring the best formaldehyde removal effect and energy consumption.

[0009] In order to achieve the above object, the present invention provides an air conditioner indoor unit, comprising:

[0010] A shell body having a heat exchange outlet;

[0011] Indoor heat exchanger, the refrigerant flowing inside it exchanges heat with the indoor air to form a heating cycle or a cooling cycle;

[0012] An electric heating device is disposed in the housing and is used to heat the indoor air so as to flow into the room through the heat exchange air outlet;

[0013] A fresh air fan is arranged in the housing and is used to transport outdoor fresh air to indoor areas;

[0014] A formaldehyde concentration sensor is disposed in the housing and is used to detect indoor formaldehyde concentration;

[0015] The controller is configured as:

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

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

[0018] When it is detected that the indoor formaldehyde concentration is higher than a first preset concentration, the fresh air fan is controlled to start to introduce fresh air into the room;

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

[0020] After the air conditioner indoor unit of the present application is in the formaldehyde removal mode, when the indoor heat exchanger is used as a condenser and operates for the first preset time, if it is detected that the indoor temperature is lower than the first preset temperature, it means that the heating capacity of the indoor heat exchanger is insufficient and the indoor temperature cannot be raised to the first preset temperature. By turning on 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 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 present application, it also includes:

[0022] Human sensor, which is used to detect whether there is someone in the room;

[0023] The controller is configured to: when the human sensing sensor detects that there is someone in the room, control the air conditioner indoor unit to issue a prompt; after the prompt is issued for a preset time, control the human sensing sensor to detect whether there is someone in the room.

[0024] In some embodiments of the present application, it also includes:

[0025] A heat exchange fan is arranged in the housing and is used to transport indoor air to the room through a heat exchange air outlet;

[0026] The controller is configured to: when the human sensing sensor detects that there is no one 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;

[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 controlled to increase.

[0028] In some embodiments of the present application, the controller is configured such that when the indoor temperature is not lower than a first preset temperature, the indoor heat exchanger is not started to operate.

[0029] In some embodiments of the present application, it further includes: a humidifier, which is disposed in the housing, and the humidifier is used to generate steam to flow into the room;

[0030] The controller is configured to: detect indoor humidity after the electric heating device is turned on for a first period of time;

[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, the indoor heat exchanger is used as a condenser to run for a second period of time, and then the humidifier is turned on; after the humidifier is turned on for a third period of time, the fresh air fan is turned on; after the fresh air fan is turned on for a fourth period of time, the controller controls to issue a warning reminder.

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

[0035] A shell body having a heat exchange outlet;

[0036] Indoor heat exchanger, the refrigerant flowing inside exchanges heat with the air to form a heating cycle or a cooling cycle;

[0037] Window opener, which is used to control the opening or closing of windows;

[0038] A formaldehyde concentration sensor is disposed in the housing and is used to detect indoor formaldehyde concentration;

[0039] The controller is configured as:

[0040] When the indoor temperature is lower than the 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, controlling the indoor heat exchanger to function as a condenser to operate for a first period of time, and detecting the indoor formaldehyde concentration;

[0042] When the indoor formaldehyde concentration is detected to be higher than the first preset concentration, the outdoor particle concentration is detected;

[0043] When it is detected that the outdoor particle concentration is lower than the first particle concentration, the window opener opens the window;

[0044] When it is detected that the outdoor particle concentration is not lower than the first particle concentration, the window opener closes the window.

[0045] In some embodiments of the present application, it also includes:

[0046] A heat exchange fan is arranged in the housing and is used to transport indoor air to the room through a heat exchange air outlet;

[0047] A humidifier is disposed in the housing, and is used to generate steam to flow into the room;

[0048] The controller is configured to: when the window is opened and the indoor formaldehyde concentration is detected to be lower than a second preset concentration, control the heat exchange fan speed to decrease, control the indoor heat exchanger to stop running, control the humidifier to start running at the first power, and control the window opener to close the window.

[0049] In some embodiments of the present application, it further includes: a formaldehyde removal module, which is disposed in the housing, and the formaldehyde removal module is used to remove formaldehyde in the indoor air;

[0050] The controller is configured to: when it is detected that the outdoor particle concentration is not lower than the first particle concentration, the window opener closes the window and the formaldehyde removal module is turned on;

[0051] 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 controlled to decrease, the indoor heat exchanger is controlled to stop running, and the humidifier is controlled to be turned off.

[0052] In some embodiments of the present application, it further includes: a fresh air fan, which is arranged in the housing, and the fresh air fan is used to transport outdoor fresh air to the room;

[0053] The controller is configured to: when it is detected that the outdoor particle concentration is not lower than the first particle concentration, the window opener closes the window and the fresh air fan is turned on to introduce fresh air into the room.

[0054] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0056] Figure 2 This is a schematic diagram of the overall structure of a wall-mounted air conditioner indoor unit according to one embodiment of the present application. Figure 1 ;

[0057] Figure 3 This is a schematic diagram of the overall structure of a wall-mounted air conditioner indoor unit according to one embodiment of the present application. Figure 2 ;

[0058] Figure 4 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 1 ;

[0059] Figure 5 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 2 ;

[0060] Figure 6 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 3 ;

[0061] Figure 7 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 4 ;

[0062] Figure 8 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 5 ;

[0063] Fig. 9 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 6 ;

[0064] Fig.10 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 7 ;

[0065] Fig.11 This is the working process of the air conditioner indoor unit according to one embodiment of the present application Figure 8 ;

[0066] Fig.12 It is a work flow chart of an air conditioner indoor unit according to one embodiment of the present application in which a formaldehyde removal module and a fresh air module are not provided;

[0067] Fig.13 It is a work flow chart of a formaldehyde removal module provided in an indoor unit of an air conditioner according to one embodiment of the present application;

[0068] Fig.14 This is a working flow diagram of a fresh air blower being provided in an indoor unit of an air conditioner according to one embodiment of the present application;

[0069] Fig.15 This is a working flow chart of an air-conditioning indoor unit provided with a formaldehyde removal module and a fresh air blower according to one 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 invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0076] In the present application, the 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 refrigeration 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 refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air, provides cooling to the indoor space through the heat absorption process of the refrigerant, and achieves temperature regulation of the indoor space.

[0078] The compressor compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas, which flows into the outdoor heat exchanger. The outdoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0079] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0080] 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 cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the indoor air.

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

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

[0083] The heating cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air, provides heat to the indoor space through the heat release process of the refrigerant, and realizes temperature regulation of the indoor space.

[0084] The compressor compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas, which flows into the indoor heat exchanger. The indoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat generated by the condensation is exchanged with the indoor air flowing through the indoor heat exchanger, thereby increasing the indoor temperature.

[0085] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger into a low-pressure liquid-phase refrigerant.

[0086] 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 may perform heat exchange with outdoor air by utilizing latent heat of evaporation of the refrigerant.

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

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

[0089] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner indoor unit functions as a heater in a heating mode, and when the indoor heat exchanger functions as an indoor heat exchanger, the air conditioner indoor unit functions as a cooler in a cooling mode.

[0090] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

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

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

[0093] The air conditioner of the present application includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a pipeline for circulating refrigerant, wherein the indoor heat exchanger and the outdoor heat exchanger are both connected to the compressor. The expansion valve is an electronic expansion valve, which is connected between the indoor heat exchanger and the outdoor heat exchanger and can expand the liquid refrigerant that has undergone a condensation process into a low-pressure liquid refrigerant.

[0094] The compressor includes an air intake port and an air exhaust port. The refrigerant that absorbs heat and undergoes an evaporation process enters the compressor from the air intake port. The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure state and then discharges it from the exhaust port.

[0095] The indoor heat exchanger and the outdoor heat exchanger are respectively connected to the compressor through a four-way valve in the refrigerant circuit, 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 air intake port of the compressor is fixedly connected to the first valve port, and the air discharge port of the compressor is fixedly connected to the third valve port.

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

[0097] When the air conditioner is in cooling mode, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port. When the air conditioner is in heating mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

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

[0099] As attached Figures 1 to 11 As shown, in an exemplary embodiment of an air-conditioning indoor unit of the present invention, the air-conditioning indoor unit includes: a housing 100, an indoor heat exchanger, a heat exchange fan, a fresh air fan, a formaldehyde concentration sensor, an indoor temperature sensor and an indoor humidity sensor.

[0100] The housing 100 is provided with a heat exchange outlet; the heat exchange fan is arranged in the housing 100; the heat exchange fan is used to transport indoor air to the indoor through the heat exchange 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 housing 100, and the fresh air fan is used to transport outdoor fresh air to the indoor; the formaldehyde concentration sensor is arranged in the housing, and the formaldehyde concentration sensor is used to detect the indoor formaldehyde concentration. The indoor humidity sensor is arranged in the housing, and the indoor humidity sensor is used to detect the indoor humidity; the indoor temperature sensor is arranged in the housing, and the indoor temperature sensor is used to detect the indoor temperature.

[0101] The controller is configured as follows: when the indoor temperature is lower than a first preset temperature, the indoor heat exchanger is used as a condenser; after the indoor heat exchanger is used as a condenser and operates for a first preset time, when 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 the first preset concentration, the fresh air blower is controlled to be turned on to introduce fresh air into the room; 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 operating, and the first preset concentration is higher than the second preset concentration.

[0102] According to the above scheme, after the air conditioner indoor unit starts the formaldehyde removal mode, when the indoor heat exchanger is used as a condenser and operates for the first preset time, if it is detected that the indoor temperature is lower than the first preset temperature, it means that the heating capacity of the indoor heat exchanger is insufficient and the indoor temperature cannot be raised to the first preset temperature. By turning on the electric auxiliary heating device to promote the increase of the indoor temperature, the heating capacity of the indoor heat exchanger is improved. 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.

[0103] The first preset concentration is the concentration when the indoor formaldehyde concentration reaches a balanced state, and the second preset concentration is the concentration at which the indoor formaldehyde concentration will 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 means that the indoor formaldehyde concentration is relatively high at this time, and the formaldehyde released into the air from the furniture is basically saturated and reaches a balanced state. At this time, the fresh air fan is turned on, and the fresh air fan is used to transport the outdoor fresh air into the room, and the indoor air containing formaldehyde is discharged to the outside, completing the discharge of formaldehyde. Among them, the way in which the fresh air fan transports the fresh air to the room can be to directly introduce the outdoor fresh air into the room through the fresh air duct, or the fresh air fan can transport the indoor air to the outside, so that a negative pressure is formed indoors, and the outdoor fresh air enters the room through the door gap or window gap.

[0104] When the indoor formaldehyde concentration is lower than the second preset concentration, the indoor formaldehyde concentration has dropped to a concentration range that will not cause harm to the human body. 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 a formaldehyde removal cycle ends.

[0105] The indoor heat exchanger also includes an internal air guide plate, which is arranged at the heat exchange outlet. The heat exchange outlet is connected to the indoor air inlet. Driven by the heat exchange fan, 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 outlet.

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

[0107] When the air conditioner indoor unit is a wall-mounted air conditioner indoor unit, the inner air guide plate can swing back and forth left and right to sweep the indoor air left and right.

[0108] In some embodiments, the air conditioner indoor unit further includes a human presence sensor, and the human presence sensor is used to detect whether there is someone in the room.

[0109] When the controller receives the command to start the formaldehyde removal mode, the human sensor turns on to detect whether there is someone in the room.

[0110] When the human sensor detects that there is someone in the room, the air conditioner indoor unit is controlled to issue a prompt to remind the user to leave the room within the preset time. After the preset time, the human sensor is controlled to detect whether there is someone in the room again. When it is detected that there is no one in the room, the controller controls to execute a formaldehyde removal cycle. The air conditioner indoor unit issues a prompt in the following ways: the air conditioner indoor unit issues a voice prompt or the air conditioner indoor unit issues a prompt through its control software. The preset time can be set to five minutes.

[0111] A formaldehyde removal cycle includes: at the beginning of the formaldehyde removal cycle, the indoor heat exchanger is not turned on, the heat exchange fan is controlled to be turned on, and the heat exchange fan rotates at a first speed to run for a first disturbance time. At the same time, the inner air guide plate swings back and forth to disturb the indoor air, increase the air flow speed between the indoor air and the surface of the wooden furniture, and thus promote the release of formaldehyde.

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

[0113] After the heat exchange fan rotates 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 to increase the speed of the heat exchange fan, that is, the speed of the heat exchange fan is switched from medium speed to high speed, thereby quickly disturbing the indoor air. After the speed of the heat exchange fan is increased, the inner air guide plate stops swinging back and forth, and the inner air guide plate rotates to the minimum wind blocking position to reduce the resistance of the inner air guide plate to the indoor air flowing out of the heat exchange outlet, thereby increasing the air volume of the indoor air flowing out of the heat exchange outlet.

[0114] When the dehumidification cycle is running, the inner air guide plate rotates to the minimum wind blocking position, and the outer air guide plate switches to the long-distance air supply position. When the formaldehyde removal cycle is running, the inner air guide plate of the heat exchange outlet and the air guide plate of the fresh air outlet of the air conditioner are both in the minimum wind blocking position to reduce the resistance to air flow, increase the air supply distance, and enhance the disturbance effect of indoor air.

[0115] In some embodiments, after the controller of the air conditioner indoor unit receives a command to turn on the formaldehyde 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. It can be set that the third preset concentration is 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 the furniture and home furnishings have released a large amount of formaldehyde into the indoor air. 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.

[0116] When 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.

[0117] When the indoor temperature is not lower than the first preset temperature, the indoor heat exchanger is not turned on. At this time, the indoor temperature is high, which can promote the release of formaldehyde in the furniture into the air. At this time, there is no need to use the indoor heat exchanger 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 operated as a condenser.

[0119] After the indoor heat exchanger is used as a condenser and operates for a first preset time, the indoor temperature is detected. When 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, and the electric heating device is controlled to be turned on to quickly heat the indoor air.

[0120] In some embodiments, the air conditioner indoor unit further includes a humidifier, which is disposed in the shell and is used to generate steam to be discharged from the shell through the heat exchange outlet and flow into the room.

[0121] The controller is configured to: after the electric heating device is turned on for a first period of time, 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] Among them, after the electric heating device is turned on for a first period of time, the indoor humidity sensor remains in an on state, and when it is detected that the indoor humidity is not lower than a 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 turn on to humidify the indoor air. The steam generated by the humidifier is discharged into the indoor space through the heat exchange outlet, so that the indoor temperature and humidity reach the temperature and humidity that promote the rapid release of formaldehyde from indoor wood materials.

[0124] In some embodiments, after the indoor heat exchanger is used as a condenser and operates for a first preset time, the indoor temperature is detected. When the indoor temperature is detected to be not lower than the first preset temperature, it means that the heating capacity of the indoor heat exchanger is sufficient to meet the indoor temperature increase demand. At this time, the indoor heat exchanger is controlled to operate for a second preset time so that the indoor heat exchanger continues to increase the indoor temperature. After the indoor heat exchanger operates for the second preset time, the indoor humidity sensor is turned on to detect the indoor humidity.

[0125] Among them, after the indoor heat exchanger runs for a second preset time, the indoor humidity sensor remains in an on 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 turn on.

[0126] When it is detected that the indoor humidity is lower than the first preset humidity, the controller controls the humidifier to turn on to humidify the indoor air. The steam generated by the humidifier is discharged into the indoor space through the heat exchange outlet, so that the indoor temperature and humidity reach the temperature and humidity that promote the rapid release of formaldehyde from indoor wood materials.

[0127] When it is detected that the indoor formaldehyde concentration is 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 a high speed to quickly discharge the indoor air rich in high-concentration formaldehyde to the outside.

[0128] The first preset concentration is the concentration when the release of formaldehyde reaches a balanced state. It can be set that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range. The preset fluctuation range can be set to 0.001 mg / m 3 .

[0129] When the indoor formaldehyde concentration in the indoor air drops below the second preset concentration, it can also be set that the indoor formaldehyde concentration remains below the second preset concentration within the second preset time. If the electric heating device is turned on at this time, the controller controls the electric heating device to be turned off, controls the indoor heat exchanger to stop running, and switches the heat exchange fan to a medium speed state, that is, the heat exchange fan reduces the wind speed and rotates at the first speed, the fresh air fan stops rotating, and the humidifier stops humidifying. Therefore, when the indoor formaldehyde concentration drops below the second preset concentration, a formaldehyde removal cycle ends. At this time, stopping the indoor temperature increase can save energy consumption and wait for the next formaldehyde removal cycle to run. At this time, a formaldehyde removal cycle ends.

[0130] The second preset concentration can be set to 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 for the human body.

[0131] At the end of the formaldehyde removal cycle, the air conditioner indoor unit keeps running for the third preset time, and then detects the indoor humidity through the indoor humidity sensor. When the indoor humidity is higher than the second preset humidity, the controller controls the dehumidification mode to run the dehumidification program, and the indoor heat exchanger is used as an evaporator to dehumidify the indoor air to prevent corrosion or short circuit of electrical components in the room due to excessive indoor air humidity. Among them, the second preset humidity is lower than the first preset humidity. When the indoor humidity drops to no more 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 requirements. The indoor humidity will not cause corrosion or short circuit to the electrical components in the room. When the dehumidification mode ends, it starts to enter the next formaldehyde removal cycle.

[0132] At the end of the formaldehyde removal cycle, the air conditioner indoor unit keeps running for the third preset time, and then detects the indoor humidity through the indoor humidity sensor. When the indoor humidity is not higher than the second preset humidity, the dehumidification mode does not start. This means that the indoor humidity is low at this time, meeting the preset requirements, and the indoor humidity will not cause corrosion or short circuit to the electrical components in the room. When the dehumidification mode ends, it starts to enter the next formaldehyde removal cycle.

[0133] When the indoor formaldehyde concentration in the indoor air drops below the second preset concentration, it can also be set that the indoor formaldehyde concentration remains below the second preset concentration within the second preset time. If the electric heating device is not turned on at this time, the indoor heat exchanger is not used as a condenser and stops heating, and the speed of the heat exchange fan is switched to medium speed, that is, the heat exchange fan reduces the wind speed and rotates at the first speed, the fresh air fan stops rotating, and the humidifier stops humidifying. At this time, a formaldehyde removal cycle ends, and stopping the indoor temperature increase at this time can save energy consumption.

[0134] At the end of the formaldehyde removal cycle, the air conditioner indoor unit keeps running for the third preset time, and then detects the indoor humidity through the indoor humidity sensor. When the indoor humidity is higher than the second preset humidity, the controller controls the dehumidification mode to be turned on, and the indoor heat exchanger is used as an evaporator to dehumidify the indoor air to prevent corrosion or short circuit of electrical components in the room due to excessive humidity of the indoor air. Among them, the second preset humidity is lower than the first preset humidity. When the indoor humidity drops to no more 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 requirements. The indoor humidity will not cause corrosion or short circuit to the electrical components in the room. When the dehumidification mode ends, it starts to enter the next formaldehyde removal cycle.

[0135] At the end of the formaldehyde removal cycle, the air conditioner indoor unit keeps running for the third preset time, and then detects the indoor humidity through the indoor humidity sensor. When the indoor humidity is not higher than the second preset humidity, the dehumidification mode does not start. This means that the indoor humidity is low at this time, meeting the preset requirements, and the indoor humidity will not cause corrosion or short circuit to the electrical components in the room. When the dehumidification mode ends, it starts to enter the next formaldehyde removal cycle.

[0136] The formaldehyde removal cycle is a cyclic process. After a formaldehyde removal process is completed, the indoor temperature sensor and the indoor humidity sensor are turned off, and the indoor formaldehyde concentration sensor is always on. When it is detected that the indoor formaldehyde temperature is higher than the third preset concentration again, the controller controls to start the formaldehyde removal cycle again.

[0137] When the air conditioner operates in a dehumidification mode, the air conditioner performs a dehumidification cycle of the air conditioner indoor unit by using a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

[0138] The dehumidification cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air. The refrigerant absorbs heat to provide cooling to the indoor space, thereby achieving temperature regulation of the indoor space.

[0139] The compressor compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas, which flows into the outdoor heat exchanger. The outdoor heat exchanger condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

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

[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 cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the indoor air.

[0142] During 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 command to stop formaldehyde removal, regardless of whether the formaldehyde removal cycle is in an incomplete state, it is necessary to wait for a formaldehyde removal cycle to be completed. The controller then controls to shut down the fresh air fan and the humidifier, thereby ensuring the indoor formaldehyde removal efficiency and ensuring that the indoor formaldehyde concentration is reduced to below a second preset concentration to avoid harm to the human body caused by excessive formaldehyde concentration.

[0144] In some embodiments, when the formaldehyde removal cycle is running, if there is a sudden power outage, the cloud server of the air conditioner indoor unit records the operating status of each component of the air conditioner indoor unit at this time. When the power is restored again, the components of the air conditioner operate according to the operating status before the power outage.

[0145] When one of the indoor temperature sensor, indoor humidity sensor or formaldehyde concentration sensor of the air conditioner indoor unit is abnormal, resulting in the inability to obtain the indoor air quality status in time, the controller controls the emergency formaldehyde removal mode, the indoor heat exchanger is used as a condenser to run for the second time, and then the humidifier is turned on; after the humidifier is turned on and runs for the third time, the fresh air fan is turned on; after the fresh air fan is turned on and runs for the fourth time, the controller controls to issue a warning reminder to remind the user to turn off the formaldehyde removal cycle. If the user still does not turn off the formaldehyde removal cycle after the controller issues a warning reminder, the air conditioner indoor unit continues to operate in the emergency formaldehyde removal mode to prevent the indoor temperature or indoor humidity from being too high, and the indoor formaldehyde concentration is too high to be correctly detected, which affects the formaldehyde removal efficiency and the high energy consumption of the air conditioner indoor unit. Among them, the second time length can be set to thirty minutes, the third time length can be set to thirty minutes, and the fourth time length can be set to sixty minutes.

[0146] Among them, the abnormal situations of a certain sensor include: the controller cannot receive the feedback electrical signal from a certain sensor, or the feedback electrical signal shows a large abnormality, and the electrical signal suddenly changes from strong to weak instead of a slow change process. These situations can be understood as a certain sensor abnormality.

[0147] See also Figure 4-Figure 15 In some embodiments, the air conditioner indoor unit further includes a window opener, which is used to control the opening or closing of a window.

[0148] The controller is configured as follows: 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; 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 operate for a first time period and the indoor formaldehyde concentration is detected; when it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor particle concentration is detected; when it is detected that the outdoor particle concentration is lower than the first particle concentration, the window opener opens the window; when it is detected that the outdoor particle concentration is not lower than the first particle concentration, the window opener closes 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 means that the indoor temperature has risen to promote the release of formaldehyde in the furniture. 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 means that the indoor environment is a high temperature and high humidity environment at this time, and the formaldehyde in the furniture can be promoted to be released into the indoor air under the high temperature and high humidity environment. When it is detected that the indoor formaldehyde concentration is higher than the first preset concentration, it means that the indoor formaldehyde concentration is high to reach a balanced state, and fresh air needs to be introduced into the room to dilute the indoor formaldehyde concentration and squeeze the formaldehyde out of the room. The outdoor air quality is detected by detecting the outdoor particle concentration. When it is detected that the outdoor particle concentration is lower than the first particle concentration, it means that the outdoor air quality is high at this time. The controller controls the window opener to open the window, so as to introduce outdoor fresh air into the room, and the formaldehyde in the indoor air is discharged to the outside through the window.

[0150] When it is detected that the outdoor particle concentration is not lower than the first particle concentration, it means that the outdoor particle concentration is high at this time, and the controller controls the window opener to keep the window closed to prevent outdoor particles from entering the room and avoid introducing other pollutants into the room. It can be set that the outdoor particles are PM2.5, and the outdoor particle concentration is detected by the 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 someone in the room.

[0152] When the human sensor detects that there is someone in the room, the air conditioner indoor unit is controlled to issue a prompt to remind the user to leave the room within the preset time. After the preset time, the human sensor is controlled to detect whether there is someone in the room again. When it is detected that there is no one in the room, the controller controls the window opener to close the window, and the controller controls to execute a formaldehyde removal cycle. The air conditioner indoor unit issues a prompt in the following ways: the air conditioner indoor unit issues a voice prompt or the air conditioner indoor unit issues a prompt through its control software. The preset time can be set to five minutes.

[0153] A formaldehyde removal cycle includes: at the beginning of the formaldehyde removal cycle, the indoor heat exchanger is not turned on, the heat exchange fan is controlled to be turned on, and the heat exchange fan rotates at a first speed to run for a first disturbance time. At the same time, the inner air guide plate swings back and forth to disturb the indoor air, increase the air flow speed between the indoor air and the surface of the wooden furniture, and thus promote the release of formaldehyde.

[0154] Among them, the first disturbance time can be determined according to the ratio of the rated air volume of the heat exchange fan and the indoor space. The first disturbance time of the cabinet air-conditioning indoor unit can be set to five minutes, and the first disturbance time of the wall-mounted air-conditioning indoor unit can be set to three minutes.

[0155] After the heat exchange fan rotates 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 to increase the speed of the heat exchange fan, that is, the speed of the heat exchange fan is switched from medium speed to high speed, thereby quickly disturbing the indoor air. After the speed of the heat exchange fan is increased, the inner air guide plate stops swinging back and forth, and the inner air guide plate rotates to the minimum wind blocking position to reduce the resistance of the inner air guide plate to the indoor air flowing out of the heat exchange outlet, thereby increasing the air volume of the indoor air flowing out of the heat exchange outlet.

[0156] When the formaldehyde removal cycle is running, the inner air guide plate rotates to the minimum wind blocking position, and the outer air guide plate switches to the long-distance air supply position. When the formaldehyde removal cycle is running, the inner air guide plate of the heat exchange air outlet and the air guide plate of the fresh air outlet of the air conditioner are both in the minimum wind blocking position to reduce the resistance to air flow, increase the air supply distance, and enhance the disturbance effect of indoor air.

[0157] In some embodiments, after the controller of the air conditioner indoor unit receives a command to turn on the formaldehyde 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. It can be set that the third preset concentration is 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 the furniture and home furnishings have released a large amount of formaldehyde into the indoor air. 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 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 turned on and the heat exchange fan runs at a second high speed. At this time, the indoor temperature is high, which can promote the release of formaldehyde in the furniture into the air. At this time, there is no need to use the indoor heat exchanger 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 indicates that the heating capacity of the indoor heat exchanger is insufficient, and the indoor heat exchanger is started and operated as a condenser. The indoor heat exchanger is started and operated at maximum power to heat 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, 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 turns on the humidifier when the indoor humidity drops below the first preset humidity.

[0163] When it is detected that the indoor humidity is lower than the first preset humidity, the controller controls the humidifier to turn on to humidify the indoor air. The steam generated by the humidifier is discharged into the indoor space through the heat exchange outlet, so that the indoor temperature and humidity reach the temperature and humidity that promote the rapid release of formaldehyde from indoor wood materials.

[0164] When the indoor humidity is not lower than the first preset temperature and the indoor humidity is not lower than the first preset humidity, the indoor heat exchanger and the heat exchange fan maintain the current operating state for a period of time, and then the formaldehyde concentration sensor is turned on to detect the indoor formaldehyde concentration. The period of time can be set to sixty minutes. When the indoor formaldehyde concentration is higher than the first preset concentration, the outdoor particle concentration is detected. When the outdoor particle concentration is detected to be lower than the first particle concentration, it means that the outdoor air quality is high at this time. The controller controls the window opener to open the window, thereby introducing outdoor fresh air into the room, and the formaldehyde in the indoor air is discharged to the outside through the window. When the outdoor particle concentration is detected to be not lower than the first particle concentration, it means that the outdoor particle concentration is high at this time. The controller controls the window opener to keep the window closed to prevent outdoor particles from entering the room and avoid introducing other pollutants into the room.

[0165] The first preset concentration is the concentration when the release of formaldehyde reaches a balanced state. It can be set that when the indoor formaldehyde concentration is higher than the first preset concentration, the indoor formaldehyde concentration fluctuation range within the set time does not exceed the preset fluctuation range. The preset fluctuation range can be set to 0.001 mg / m 3 .

[0166] See also Fig.12 In some embodiments, the air conditioner indoor unit is not provided with a formaldehyde removal module and a fresh air blower.

[0167] When the window is open and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that within a period of time, when the indoor formaldehyde concentration remains lower than the second preset concentration, the period of time can be set to five minutes, the controller controls the heat exchange fan to reduce the speed, controls the indoor heat exchanger to stop running, controls the humidifier to run at the first power, and controls the window opener to close the window, at which time a formaldehyde removal cycle ends. It can be set that the second preset concentration can be set to 0.08g / m 3The first power is 60% of the rated power of the humidifier. If the humidifier is turned off at this time, the indoor humidity will drop rapidly. When the next formaldehyde removal cycle starts, the indoor humidity cannot rise rapidly, which will extend the duration of the formaldehyde removal cycle, resulting in reduced formaldehyde removal efficiency and increased air conditioning energy consumption. Therefore, running the humidifier at a first power lower than the rated power can avoid a drop 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, the period of time can be set to five minutes, the speed of the heat exchange fan is controlled to decrease, the indoor heat exchanger is controlled to stop running, and the humidifier is controlled to be turned off. At this time, a formaldehyde removal cycle ends. Since the window is closed at this time, the indoor humidity fluctuation is small, so controlling the humidifier to turn off can also keep the indoor humidity change small. At the same time, turning off the humidifier can also save energy consumption.

[0169] When the formaldehyde concentration in the indoor air does not drop below the second preset concentration, the indoor heat exchanger is used as an evaporator, and the air conditioner indoor unit is switched from heating mode to dehumidification mode. The heat exchange fan operates at a high speed, so that the high-concentration formaldehyde gas in the room enters the shell and flows through the indoor heat exchanger, so that the formaldehyde is dissolved in the condensed water condensed by the water vapor when it is cooled, and then discharged to the outside through the condensed water drainage pipe, thereby improving the indoor formaldehyde removal effect.

[0170] See also Fig.13 In some embodiments, a formaldehyde removal module is provided in the indoor heat exchanger, but no fresh air blower is provided, and the formaldehyde removal module is used to remove formaldehyde from the indoor air. The formaldehyde removal module removes formaldehyde from the indoor air in ways including, but not limited to, physical adsorption (e.g., adsorption materials such as activated carbon), chemical bonding (e.g., potassium permanganate chemical reaction, etc.), catalytic oxidation (e.g., photocatalytic catalysis, room temperature catalytic catalysis, high temperature catalytic catalysis) and other technical means.

[0171] When it is detected that the outdoor particle concentration is not lower than the first particle concentration, the controller controls the window opener to keep the window closed, and at the same time turns on the formaldehyde removal module to allow the indoor air to flow through the formaldehyde removal module. The formaldehyde removal module is used to remove formaldehyde in the indoor air to purify the indoor air, while preventing outdoor pollutants from entering the room.

[0172] When the window is open and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that within a period of time, when the indoor formaldehyde concentration remains lower than the second preset concentration, the period of time can be set to five minutes, the controller controls the heat exchange fan to reduce the speed, controls the indoor heat exchanger to stop running, controls the humidifier to run at the first power, and controls the window opener to close the window, at which time a formaldehyde removal cycle ends. It can be set that the second preset concentration can be set to 0.08g / m 3The first power is 60% of the rated power of the humidifier. If the humidifier is turned off at this time, the indoor humidity will drop rapidly. When the next formaldehyde removal cycle starts, the indoor humidity cannot rise rapidly, which will extend the duration of the formaldehyde removal cycle, resulting in reduced formaldehyde removal efficiency and increased air conditioning energy consumption. Therefore, running the humidifier at a first power lower than the rated power can avoid a drop in indoor humidity.

[0173] When the window is closed, if the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that, within a period of time, when the indoor formaldehyde concentration remains lower than the second preset concentration, the period of time can be set to five minutes, the speed of the heat exchange fan is controlled to decrease, the indoor heat exchanger is controlled to stop running, the humidifier is controlled to be turned off, and the formaldehyde removal module is controlled to be turned off. At this time, a formaldehyde removal cycle ends. Since the window is closed at this time, the indoor humidity fluctuation is small, so controlling the humidifier to turn off can also keep the indoor humidity change small. At the same time, turning off the humidifier can also save energy consumption.

[0174] When one formaldehyde removal cycle is completed, if the controller does not receive a command to turn off the formaldehyde removal mode, the next formaldehyde removal cycle will be started immediately.

[0175] When a formaldehyde removal cycle is in progress and the controller receives a command to turn off the formaldehyde removal mode, if it detects that the window is open at this time, the controller controls the window closer to close the window, thereby avoiding the situation where the outdoor weather suddenly changes and it is about to rain, and preventing the storm from blowing into the room before the formaldehyde removal cycle is completed.

[0176] When a formaldehyde removal cycle is in progress and the controller receives a command to turn off the formaldehyde removal mode, the controller simultaneously controls the formaldehyde removal module to switch from the off state to the on state, the operating states of the indoor heat exchanger and the heat exchange fan remain unchanged, and the operating state of the humidifier remains unchanged.

[0177] When a formaldehyde removal cycle ends, the controller controls the humidifier to turn off, the air conditioner indoor unit switches from heating mode to dehumidification 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 drops below the second preset humidity or when the air conditioner is in dehumidification mode for a period of time, the indoor heat exchanger and the heat exchange fan stop running. Among them, the period of time can be set to thirty minutes, so as to reduce the indoor air humidity and prevent the excessive indoor humidity from affecting some internal components of indoor electrical appliances.

[0178] When it is detected that the window is in a closed state, the controller controls to shield the instructions from the user. When a formaldehyde removal cycle is completed, the controller controls the humidifier to turn off.

[0179] After the air conditioner indoor unit switches from the heating mode to the dehumidification mode, when it is detected that the indoor humidity drops below the second preset humidity, the controller controls the indoor heat exchanger and the heat exchange fan to stop running.

[0180] When a formaldehyde removal cycle ends and the controller receives a command to shut down the formaldehyde removal mode, the controller controls the humidifier to shut down, controls the formaldehyde removal module to shut down, controls the window closer to close the window, and the indoor heat exchanger switches from heating mode to dehumidification mode. After the dehumidification mode runs for a period of time, which can be set to thirty minutes, the air conditioner indoor unit stops running.

[0181] See also Fig.14 In some embodiments, the air conditioner indoor unit is provided with a fresh air fan, but no formaldehyde removal module is provided. The fresh air fan is arranged in a shell, and the fresh air fan is used to transport outdoor fresh air into the room.

[0182] When it is detected that the outdoor particle concentration is not lower than the first particle concentration, the controller controls the window opener to keep the window closed, and turns on the fresh air fan to drive outdoor air into the room, thereby reducing the indoor formaldehyde concentration. Under the condition of slight positive pressure in the room, the indoor formaldehyde gas is discharged to the outside through the gaps. At the same time, closing the window can prevent outdoor pollutants from entering the room.

[0183] When a formaldehyde removal cycle is in progress and the controller receives a command to turn off the formaldehyde removal mode, if it detects that the window is open at this time, the controller controls the window closer to close the window, thereby avoiding the situation where the outdoor weather suddenly changes and it is about to rain, and preventing the storm from blowing into the room before the formaldehyde removal cycle is completed.

[0184] When the controller receives a command to turn off the formaldehyde removal mode during a formaldehyde removal cycle, the controller simultaneously controls the fresh air fan to switch from the off state to the on state, and the fresh air fan operates to drive outdoor air into the room. The operating states of the indoor heat exchanger and the heat exchange fan remain unchanged, and the operating state of the humidifier remains unchanged.

[0185] When a formaldehyde removal cycle ends, the controller controls the humidifier to turn off, the air conditioner indoor unit switches from heating mode to dehumidification 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 drops below the second preset humidity or when the air conditioner is in dehumidification mode for a period of time, the indoor heat exchanger and the heat exchange fan stop running. Among them, the period of time can be set to thirty minutes, so as to reduce the indoor air humidity and prevent the excessive indoor humidity from affecting some internal components of indoor electrical appliances.

[0186] When it is detected that the window is in a closed state, the controller controls to shield the instructions from the user. When a formaldehyde removal cycle is completed, the controller controls the humidifier to turn off.

[0187] After the air conditioner indoor unit switches from the heating mode to the dehumidification mode, when it is detected that the indoor humidity drops below the second preset humidity, the controller controls the indoor heat exchanger and the heat exchange fan to stop running.

[0188] When a formaldehyde removal cycle ends and the controller receives a command to shut down the formaldehyde removal mode, the controller controls the humidifier to shut down, the fresh air fan to shut down, the window closer to close the window, and the indoor heat exchanger switches from heating mode to dehumidification mode. After the dehumidification mode runs for a period of time, which can be set to thirty minutes, the air conditioner indoor unit stops running.

[0189] See also Fig.15 In some embodiments, the air conditioner indoor unit is provided with both a formaldehyde removal module and a fresh air blower.

[0190] When it is detected that the outdoor particle concentration is not lower than the first particle concentration, the controller controls the window opener to keep the window closed, and turns on the formaldehyde removal module and the fresh air fan at the same time, so that the indoor air enters the housing and flows through the formaldehyde removal module. After passing through the formaldehyde removal module, the formaldehyde in the indoor air is removed to purify the indoor air. The purified air flows out to the room through the heat exchange outlet. At the same time, the fresh air fan rotates to drive the outdoor air into the room, thereby reducing the indoor formaldehyde concentration, and the indoor formaldehyde gas is discharged to the outside through the gap under the condition of a slight positive pressure in the room. It can be set that a filter is set in the housing, and the filter is used to filter the particles in the outdoor air driven by the fresh air fan. The filter can prevent outdoor particles from entering the room.

[0191] When the window is open and the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that within a period of time, when the indoor formaldehyde concentration remains lower than the second preset concentration, the period of time can be set to five minutes, the controller controls the heat exchange fan to reduce the speed, controls the indoor heat exchanger to stop running, controls the humidifier to run at the first power, and controls the window opener to close the window, at which time a formaldehyde removal cycle ends. It can be set that the second preset concentration can be set to 0.08g / m 3 The first power is 60% of the rated power of the humidifier. If the humidifier is turned off at this time, the indoor humidity will drop rapidly. When the next formaldehyde removal cycle starts, the indoor humidity cannot rise rapidly, which will extend the duration of the formaldehyde removal cycle, resulting in reduced formaldehyde removal efficiency and increased air conditioning energy consumption. Therefore, running the humidifier at a first power lower than the rated power can avoid a drop in indoor humidity.

[0192] When the window is closed, if the indoor formaldehyde concentration is detected to be lower than the second preset concentration, it can be set that within a period of time, when the indoor formaldehyde concentration remains lower than the second preset concentration, the period of time can be set to five minutes, the speed of the heat exchange fan is controlled to decrease, the indoor heat exchanger is controlled to stop running, the humidifier is controlled to be turned off, the formaldehyde removal module is controlled to be turned off, and the fresh air fan is controlled to stop rotating. At this time, a formaldehyde removal cycle ends. Since the window is closed at this time, the indoor humidity fluctuation is small, so controlling the humidifier to turn off can also keep the indoor humidity change small. At the same time, turning off the humidifier can also save energy.

[0193] When one formaldehyde removal cycle is completed, if the controller does not receive a command to turn off the formaldehyde removal mode, the next formaldehyde removal cycle will be started immediately.

[0194] In some embodiments, when a formaldehyde removal cycle is in progress and the controller receives a command to turn off the formaldehyde removal mode, if it detects that the window is open at this time, the controller controls the window closer to close the window, thereby avoiding the situation where the outdoor weather suddenly changes and it is about to rain, and preventing the storm from blowing into the room before the formaldehyde removal cycle is completed.

[0195] When a formaldehyde removal cycle is in progress and the controller receives a command to turn off the formaldehyde removal mode, the controller simultaneously controls the formaldehyde removal module to switch from the off state to the on state, controls the speed of the fresh air fan to increase, and the operating states of the indoor heat exchanger and the heat exchange fan remain unchanged, and the operating state of the humidifier remains unchanged.

[0196] When a formaldehyde removal cycle ends, the controller controls the humidifier to turn off, the air conditioner indoor unit switches from heating mode to dehumidification 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 drops below the second preset humidity or when the air conditioner is in dehumidification mode for a period of time, the indoor heat exchanger and the heat exchange fan stop running. Among them, the period of time can be set to thirty minutes, so as to reduce the indoor air humidity and prevent the excessive indoor humidity from affecting some internal components of indoor electrical appliances.

[0197] When it is detected that the window is in a closed state, the controller controls to shield the instructions from the user. When a formaldehyde removal cycle is completed, the controller controls the humidifier to turn off.

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

[0199] When a formaldehyde removal cycle ends and the controller receives a command to shut down the formaldehyde removal mode, the controller controls the humidifier to shut down, controls the formaldehyde removal module to shut down, controls the fresh air fan to stop running, controls the window closer to close the window, and the indoor heat exchanger switches from heating mode to dehumidification mode. After the dehumidification mode runs for a period of time, which can be set to thirty minutes, the air conditioner indoor unit stops running.

[0200] See also Figure 1-Figure 3 In some embodiments, the air conditioner includes an air conditioner indoor unit and an air conditioner outdoor unit 200, and an outdoor heat exchanger is disposed in the air conditioner outdoor unit 200. A refrigerant flows between the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange.

[0201] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: It includes: A shell body having a heat exchange outlet; Indoor heat exchanger, the refrigerant flowing inside it exchanges heat with the indoor air to form a heating cycle or a cooling cycle; An electric heating device, which is arranged in the housing and is used to heat the indoor air so as to flow into the room through the heat exchange air outlet; A fresh air fan is disposed in the housing and is used to transport outdoor fresh air to indoor areas; A formaldehyde concentration sensor is disposed in the housing and is used to detect indoor formaldehyde concentration; The controller is configured as: When the indoor temperature is lower than a first preset temperature, the indoor heat exchanger functions as a condenser; After the indoor heat exchanger is used as a condenser and operates for a first preset time, when it is detected that the indoor temperature is lower than a first preset temperature, controlling to turn on the electric heating device; When it is detected that the indoor formaldehyde concentration is higher than a first preset concentration, the fresh air blower is controlled to start to introduce fresh air into the room; 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. The first preset concentration is higher than the second preset concentration.

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

3. The air conditioner indoor unit according to claim 2, characterized in that: Also includes: A heat exchange fan, which is arranged in the housing, and is used to transport indoor air to the room through the heat exchange air outlet; The controller is configured to: when the human sensing sensor detects that there is no one 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 it is detected that the indoor formaldehyde concentration is higher than the third preset concentration, the speed of the heat exchange fan is controlled to increase.

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

5. The air conditioner indoor unit according to claim 1, characterized in that: Also includes: a humidifier, which is disposed in the housing, and is used to generate steam to flow into the room; The controller is configured to: detect indoor humidity after the electric heating device is turned on for a first period of time; When the indoor humidity is lower than a first preset humidity, controlling to turn on the humidifier; When the indoor humidity is not lower than the first preset humidity, the humidifier is controlled to be turned off.

6. The air conditioner indoor unit according to claim 5, characterized in that: When the controller controls the emergency formaldehyde removal mode, the indoor heat exchanger is used as a condenser to run for a second period of time, and then the humidifier is turned on; after the humidifier is turned on and runs for a third period of time, the fresh air fan is turned on; after the fresh air fan is turned on and runs for a fourth period of time, the controller controls to issue a warning reminder.

7. An air conditioner indoor unit, characterized in that: include: A shell body having a heat exchange outlet; Indoor heat exchanger, the refrigerant flowing inside exchanges heat with the air to form a heating cycle or a cooling cycle; Window opener, which is used to control the opening or closing of windows; A formaldehyde concentration sensor is disposed in the housing and is used to detect indoor formaldehyde concentration; The controller is configured as: 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; When the indoor humidity is not lower than a first preset humidity, controlling the indoor heat exchanger to function as a condenser to operate for a first period of time, and detecting the indoor formaldehyde concentration; When it is detected that the indoor formaldehyde concentration is higher than a first preset concentration, detecting the outdoor particulate matter concentration; When it is detected that the outdoor particle concentration is lower than the first particle concentration, the window opener opens the window; When it is detected that the outdoor particle concentration is not lower than the first particle concentration, the window opener closes the window.

8. The air conditioner indoor unit according to claim 7, characterized in that: Also includes: A heat exchange fan, the heat exchange fan is arranged in the housing, and the heat exchange fan is used to transport indoor air to the room through the heat exchange air outlet; A humidifier, the humidifier is disposed in the housing, the humidifier is used to generate steam to flow into the room; The controller is configured to: when the window is opened and the indoor formaldehyde concentration is detected to be lower than a second preset concentration, control the heat exchange fan speed to decrease, control the indoor heat exchanger to stop running, control the humidifier to start running at the first power, and control the window opener to close the window.

9. The air conditioner indoor unit according to claim 8, characterized in that: Also includes: A formaldehyde removal module is disposed in the housing and is used to remove formaldehyde from indoor air; The controller is configured to: when it is detected that the outdoor particle concentration is not lower than the first particle concentration, the window opener closes the window and the formaldehyde removal module turns on; When the window is closed and it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, the speed of the heat exchange fan is controlled to decrease, the indoor heat exchanger is controlled to stop running, and the humidifier is controlled to turn off.

10. The air conditioner indoor unit according to claim 8, characterized in that: It also includes: a fresh air fan, which is arranged in the housing, and the fresh air fan is used to transport outdoor fresh air to the room; The controller is configured such that: when it is detected that the outdoor particle concentration is not lower than a first particle concentration, the window opener closes the window and the fresh air blower is turned on to introduce fresh air into the room.

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