Air conditioner

Abstract

The invention relates to an air conditioner which comprises an air conditioner indoor unit. An indoor heat exchanger; a heat exchange fan; a humidifier; a human sensor; an indoor temperature sensor; an indoor humidity sensor; a fresh air fan; the controller is configured in the mode that when it is detected that the indoor space is in a human state through the human sensor, when the indoor heat exchanger serves as a condenser to work, the indoor temperature set by the current air conditioner indoor unit is defined as the first temperature, and first humidity corresponding to the first temperature is set in the controller; when the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to keep the current running state unchanged, and the fresh air fan is controlled to run in a forward rotation mode at the first power lower than the upper limit value of the rated power range of the fresh air fan; and when the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to operate at the second power lower than the upper limit value of the rated power range of the humidifier, discomfort of a user is avoided, and 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 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 a humidifier to increase the indoor humidity, but it is not disclosed that the humidifier can be used in conjunction with an indoor heat exchanger to remove formaldehyde.

[0006] Some air conditioner indoor units also include fresh air fans, which can rotate forward to introduce fresh air into the room or reverse to transport indoor air to the outside, but the effects of the forward and reverse rotation of the fresh air on indoor users and formaldehyde removal effects are not disclosed.

[0007] 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 filter needs to be replaced frequently. It is impossible to implement different formaldehyde removal methods according to whether there are people in the room and different indoor formaldehyde concentrations. Summary of the invention

[0008] The present invention solves one of the technical problems in the related art at least to a certain extent.

[0009] To this end, the present application aims to provide an air conditioner so that corresponding formaldehyde removal methods can be implemented according to whether there are people indoors and different indoor formaldehyde concentrations, so as to avoid causing discomfort to users and ensure that the formaldehyde removal effect and energy consumption of the air conditioner are optimal.

[0010] To achieve the above object, the present invention provides an air conditioner, comprising:

[0011] An air conditioner indoor unit, comprising:

[0012] The shell is provided with a heat exchange outlet;

[0013] The indoor heat exchanger is arranged inside the shell, and the refrigerant flowing inside the heat exchanger 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 shell through the heat exchange outlet;

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

[0015] A humidifier is disposed in the housing, and is used to generate steam to flow to the outside of the housing;

[0016] Human sensor, used to detect whether there is someone in the room;

[0017] Indoor temperature sensor, used to detect indoor temperature;

[0018] Indoor humidity sensor, used to detect indoor humidity;

[0019] A fresh air fan is arranged in the housing. When the fresh air fan rotates forward, it drives outdoor air into the room through the fresh air fan. When the fresh air fan rotates reversely, it drives indoor air to be discharged to the outside through the fresh air fan.

[0020] The controller is configured to: detect that there is someone in the room through the human sensor, and when the indoor heat exchanger works as a condenser, define the indoor temperature currently set by the air-conditioning indoor unit as a first temperature, and set a first humidity corresponding to the first temperature in the controller;

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

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

[0023] When the indoor humidity is not lower than the first humidity, it means that the indoor humidity has reached the optimal humidity for the release of formaldehyde in furniture and home decoration. The controller controls the humidifier to maintain the current operating state unchanged, and can maintain a high humidity environment indoors. The high humidity indoor environment can increase the release of formaldehyde in the indoor furniture into the air, while preventing the temperature from rising and causing discomfort to the user. The fresh air fan runs at the first power and medium speed to prevent the indoor temperature difference from fluctuating greatly due to the introduction of too much outdoor fresh air when the outdoor temperature is low, thereby causing discomfort to the human body.

[0024] When the indoor humidity is lower than the first humidity, it means that the indoor humidity has not reached the optimal humidity suitable for the release of formaldehyde in furniture and home furnishings. The controller controls the humidifier to operate at a second power lower than the upper limit of the rated power range of the humidifier, so that the indoor humidity can rise to the first humidity. By increasing the indoor humidity, the release of formaldehyde in the indoor furniture and home furnishings into the air can be increased. At the same time, controlling the temperature to maintain the first temperature can prevent the temperature increase from causing discomfort to the user.

[0025] In some embodiments of the present invention, it further includes:

[0026] Formaldehyde concentration sensor, used to detect indoor formaldehyde concentration;

[0027] The outdoor unit of the air conditioner comprises at least a compressor, and the compressor is connected to the indoor heat exchanger through a refrigerant circuit;

[0028] The controller is configured as:

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

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

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

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

[0033] When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser;

[0034] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operation frequency of the compressor is controlled to be increased.

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

[0036] When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser;

[0037] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is increased and the humidifier is turned on.

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

[0039] When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser;

[0040] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged and the humidifier is controlled to be turned on.

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

[0042] When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser;

[0043] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged, the operating state of the humidifier is controlled to remain unchanged, and the heat exchange fan is controlled to operate at the upper limit of the rated power range of the heat exchange fan.

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

[0045] When the human sensor detects that there is no one in the room, the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity;

[0046] Control the operating frequency of the compressor to remain unchanged, and control the operating status of the humidifier and the heat exchange fan to remain unchanged;

[0047] After a second preset time, the fresh air fan is controlled to reversely run at an upper limit value of the rated power range of the fresh air fan.

[0048] In some embodiments of the present invention, after the second preset time has passed, the fresh air fan is controlled to reversely run at the upper limit of the rated power range of the fresh air fan for a third preset time, and the formaldehyde concentration sensor is controlled to detect the indoor formaldehyde concentration;

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

[0050] Another aspect of the present invention provides an air conditioner, comprising:

[0051] An air conditioner indoor unit, comprising:

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

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

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

[0055] A humidifier is disposed in the housing, and is used to generate steam to flow to the outside of the housing;

[0056] A formaldehyde removal module, used to remove formaldehyde in the air flowing through the formaldehyde removal module;

[0057] Human sensor, used to detect whether there is someone in the room;

[0058] Indoor temperature sensor, used to detect indoor temperature;

[0059] Indoor humidity sensor, used to detect indoor humidity;

[0060] A fresh air fan is arranged in the housing. When the fresh air fan rotates forward, it drives outdoor air into the room through the fresh air fan. When the fresh air fan rotates reversely, it drives indoor air to be discharged to the outside through the fresh air fan.

[0061] The controller is configured as:

[0062] The human sensor detects that there is someone in the room, and controls the formaldehyde removal module to open so that the indoor air flows through the formaldehyde removal module;

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

[0064] When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to maintain the current operating state unchanged, and the fresh air fan is controlled to run forward at a first power lower than the upper limit of the rated power range of the fresh air fan;

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

[0066] Additional aspects and advantages of the present 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

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

[0068] 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 ;

[0069] 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 ;

[0070] Figure 4 This is the workflow of the air conditioner indoor unit when detecting that there is someone indoors according to one embodiment of the present application. Figure 1 ;

[0071] Figure 5 This is the workflow of the air conditioner indoor unit when detecting that there is someone indoors according to one embodiment of the present application. Figure 2 ;

[0072] Figure 6 This is the workflow of the air conditioner indoor unit when detecting that there is someone indoors according to one embodiment of the present application. Figure 3 ;

[0073] Figure 7 This is the workflow of the air conditioner indoor unit when detecting that there is someone indoors according to one embodiment of the present application. Figure 4 ;

[0074] Figure 8 This is the workflow of the air conditioner indoor unit when detecting that there is someone indoors according to one embodiment of the present application. Figure 5 ;

[0075] Fig. 9 This is the workflow of the air conditioner indoor unit according to one embodiment of the present application when it detects that there is no one indoors Figure 1 ;

[0076] Fig.10 This is the workflow of the air conditioner indoor unit according to one embodiment of the present application when it detects that there is no one indoors Figure 2 ;

[0077] Fig.11 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 3 ;

[0078] Fig.12 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 4 ;

[0079] Fig.13 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 5 ;

[0080] Fig.14 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 6 ;

[0081] Fig.15 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 7 ;

[0082] Fig.16 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 8 ;

[0083] Fig.17 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 9 ;

[0084] Fig.18 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 10 ;

[0085] Fig.19 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 10 one;

[0086] Fig. 20 This is the workflow of the air conditioner indoor unit when detecting that no one is indoors according to one embodiment of the present application. Figure 10 two.

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

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] In the present application, the air conditioner includes an air conditioner indoor unit and an air conditioner outdoor unit 200. When the air conditioner operates in a cooling mode, the air conditioner performs a refrigeration cycle of the air conditioner indoor unit by using a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

[0094] The 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.

[0095] 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.

[0096] 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.

[0097] 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.

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

[0099] 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.

[0100] 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.

[0101] When the heating cycle is running, 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.

[0102] 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.

[0103] The outdoor heat exchanger evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low temperature and low pressure state to the compressor. The outdoor heat exchanger may perform heat exchange with outdoor air by utilizing latent heat of evaporation of the refrigerant.

[0104] Throughout the heating cycle, the air conditioner indoor unit regulates the temperature of the indoor space.

[0105] The air conditioner outdoor unit 200 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 200 .

[0106] 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.

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

[0108] As attached Figures 1 to 20 As shown, in one embodiment of the air conditioner of the present invention.

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

[0110] The air conditioner of the present application includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a 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.

[0111] 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.

[0112] 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.

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

[0114] 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.

[0115] In some embodiments, the air conditioner indoor unit includes: a housing 100, an indoor heat exchanger, a humidifier, a heat exchange fan, a fresh air module, an indoor temperature sensor, an indoor humidity sensor, a formaldehyde concentration sensor and a human sensor.

[0116] The housing 100 forms the overall appearance of the air conditioner indoor unit, and the indoor heat exchanger, the heat exchange fan and the fresh air fan are arranged inside the housing 100 .

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

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

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

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

[0121] The humidifier is arranged in the housing 100, and is used to generate steam, and the steam can flow to the outside of the housing 100 through the heat exchange outlet under the drive of the heat exchange fan. It can be arranged that the steam can also flow to the outside of the housing through the fresh air outlet under the drive of the fresh air fan.

[0122] The fresh air module is arranged in the space inside the housing 100 of the air conditioner indoor unit, and includes a fresh air fan housing, on which a fresh air inlet and a fresh air outlet are arranged, and the fresh air inlet is connected to the outdoor air inlet on the housing 100, and a fresh air cavity connected to the fresh air inlet and the fresh air outlet is formed in the fresh air module. The fresh air inlet can be arranged at the top, front side, rear side, left side or right side of the fresh air fan housing, and correspondingly, the outdoor air inlet can be arranged at the top, front side, rear side, left side or right side of the housing 100 corresponding to the fresh air inlet.

[0123] The fresh air outlet can be arranged around the air conditioning outlet of the housing 100, so that the fresh air can be mixed with the air conditioning air flowing out of the heat exchange outlet when flowing out of the fresh air outlet, so as to reduce the influence of the fresh air on the temperature and humidity of the indoor environment, and improve the comfort of people when using the fresh air module. It can be arranged that the fresh air outlet can also be arranged on the top, front side, rear side, left side or right side of the housing 100.

[0124] The fresh air module includes a fresh air fan arranged in the fresh air cavity. The fresh air fan can be a centrifugal fan. When the fresh air fan is started, outdoor air is introduced into the room through the fresh air module. The fresh air fan is used to provide power for fresh air to flow from the fresh air inlet to the fresh air outlet. The fresh air fan includes a fan and a drive motor. The drive motor drives the fan to rotate.

[0125] The fresh air fan housing is also provided with an exhaust port, which is connected to the room. A baffle is provided inside the fresh air fan housing, which is used to rotate to close the fresh air outlet or the exhaust port.

[0126] When the fresh air fan rotates forward, the baffle rotates to close the exhaust port and open the fresh air outlet. The outdoor air enters the fresh air fan casing from the fresh air inlet driven by the fresh air fan and is discharged into the room through the fresh air outlet.

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

[0128] The fresh air module also includes a fresh air duct connecting indoor and outdoor areas, and the fresh air duct is correspondingly arranged at the outdoor air inlet.

[0129] In some embodiments, the fresh air duct is installed in the duct installation hole opened on the wall, one end of the fresh air duct faces indoors and is connected to the fresh air inlet of the fresh air module, the other end of the fresh air duct faces outdoors and is provided with an air inlet, and the fresh air duct is connected to the outdoors through the air inlet. Under the action of the fresh air fan, the outdoor fresh air enters the indoor fresh air module from the outdoors along the fresh air duct, and is blown into the indoor from the fresh air outlet, thereby introducing outdoor fresh air into the indoor.

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

[0131] It can be arranged that the indoor temperature sensor and the indoor humidity sensor can adopt an integrated temperature and humidity sensor. The indoor temperature and indoor humidity are detected by the temperature and humidity sensor.

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

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

[0134] The indoor heat exchanger further includes an inner air guide plate and an outer air guide plate, wherein the inner air guide plate is arranged at the heat exchange air outlet and is located inside the housing 100, and the outer air guide plate is arranged at the heat exchange air outlet of the indoor unit of the air conditioner, and the heat exchange air outlet is connected to the indoor air inlet. Driven by the heat exchange fan, the indoor air enters the housing 100 through the indoor air inlet, flows through the indoor heat exchanger, and is discharged into the indoor space through the heat exchange air outlet.

[0135] When the indoor unit of the air conditioner is a cabinet type indoor unit, the inner air guide plate can swing up and down to sweep the indoor air up and down, and the outer air guide plate can rotate left and right to sweep the indoor air.

[0136] When the indoor unit of the air conditioner is a wall mounted indoor unit, the inner air guide plate can swing back and forth to sweep the indoor air. The outer air guide plate can rotate up and down to sweep the indoor air.

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

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

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

[0140] When the formaldehyde removal mode is turned on, if the human sensor detects that there is someone in the room, if the indoor heat exchanger of the air conditioner indoor unit works as a condenser at this time, the indoor temperature currently set by the air conditioner indoor unit is defined as the first temperature, and the controller is set with a first humidity corresponding to the first temperature. At this time, the indoor temperature control command of the air conditioner by the formaldehyde removal mode is suppressed, and the controller controls the air conditioner to operate with the indoor temperature currently set by the user as the highest priority.

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

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

[0143] When the indoor humidity is not lower than the first humidity, it means that the indoor humidity has reached the optimal humidity suitable for the release of formaldehyde in furniture and home decoration. The controller controls the humidifier to keep the current operating state unchanged, and can maintain a high humidity environment indoors. The high humidity indoor environment can increase the release of formaldehyde in the indoor furniture into the air, while preventing the temperature from rising and causing discomfort to the user.

[0144] The fresh air fan runs at the first power and medium speed to prevent large fluctuations in indoor temperature differences caused by excessive introduction of outdoor fresh air when the outdoor temperature is low, which in turn causes discomfort to the human body.

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

[0146] When the indoor humidity is lower than the first humidity, it means that the indoor humidity has not reached the optimal humidity suitable for the release of formaldehyde in furniture and home furnishings. The controller controls the humidifier to operate at a second power lower than the upper limit of the rated power range of the humidifier, so that the indoor humidity can rise to the first humidity. By increasing the indoor humidity, the release of formaldehyde in the indoor furniture and home furnishings into the air can be increased. At the same time, controlling the temperature to maintain the first temperature can prevent the temperature increase from causing discomfort to the user.

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

[0148] After receiving the command to start the formaldehyde removal mode, the controller still operates with the temperature currently set by the user as the highest priority, so as to avoid discomfort to the user caused by changes in indoor temperature control when the dehumidification program is running.

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

[0150] If the inner air guide plate and the outer air guide plate are in the direct blowing prevention state at this time, the states of the inner air guide plate and the outer air guide plate are kept unchanged.

[0151] If the inner and outer air guide plates are in a windless state, the controller controls the inner and outer air guide plates to be adjusted to a direct blowing prevention state. In the windless state, the inner and outer air guide plates partially block the air flowing out of the heat exchange outlet. After the state adjustment, the disturbance of the indoor air can be promoted, so that the indoor air can circulate quickly, thereby promoting the release of formaldehyde in furniture and home decoration, and at the same time, it can prevent the heat exchange fan from blowing directly to the user at a high speed, causing discomfort to the user.

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

[0153] When the formaldehyde removal mode is turned on, after the formaldehyde removal mode runs for the first time, the indoor formaldehyde concentration is detected. When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than the second preset concentration, the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and heat exchange fan are controlled to maintain the current operating state unchanged. At this time, a formaldehyde removal cycle ends.

[0154] After the first period of time, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is lower than the second preset concentration, it means that the indoor formaldehyde concentration is low and will not cause harm to the human body. At this time, the fresh air fan and humidifier are controlled to stop running, thereby saving energy consumption during the operation of the air-conditioning indoor unit. The compressor and the heat exchange fan are controlled to maintain the current operating state unchanged, which can avoid the problem of excessive energy consumption caused by frequent changes in the operating frequency of the compressor.

[0155] Among them, the first duration can be set to 1.5 hours. Under normal circumstances, the best temperature and humidity environment for the human body indoors is generally 25°C, and the relative humidity is about 50%. Under this condition, it takes about 1.5 hours for the fresh air fan to replace the indoor air once.

[0156] After the first period of time, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, the fresh air fan, humidifier, compressor and heat exchange fan are controlled to maintain the current state for the first preset time, and then the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and heat exchange fan are controlled to maintain the current operating state unchanged. At this time, a formaldehyde removal cycle ends.

[0157] After the first period of time, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, it means that the indoor formaldehyde concentration is still not lower than the safety value. The fresh air fan, humidifier, compressor and heat exchange fan are controlled to maintain the current state and continue to run for the first preset time to promote the release of indoor formaldehyde and discharge the indoor formaldehyde to the outside.

[0158] After the first preset time, the indoor formaldehyde concentration is further reduced. At this time, the fresh air fan and humidifier are controlled to stop running, thereby saving energy consumption during the operation of the air-conditioning indoor unit. The compressor and heat exchange fan are controlled to maintain the current operating state unchanged, which can avoid the problem of excessive energy consumption caused by frequent changes in the operating frequency of the compressor.

[0159] See also Figure 9-Figure 20 In some embodiments, a formaldehyde removal cycle includes: when the formaldehyde removal mode is turned on, when the human sensor detects that there is no one in the room, if the indoor heat exchanger of the air conditioner indoor unit works as a condenser at this time. The controller controls to determine whether the indoor temperature is lower than the first preset temperature and whether the indoor humidity is lower than the first preset humidity.

[0160] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operation frequency of the compressor is controlled to be increased.

[0161] The controller increases the heat exchange of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows into the room through the heat exchange air outlet, thereby increasing the indoor temperature. The indoor high temperature and high humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0162] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the controller controls to increase the operating frequency of the compressor and to turn on the humidifier.

[0163] The controller increases the heat exchange of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows into the room through the heat exchange outlet, thereby increasing the indoor temperature.

[0164] When the indoor humidity is lower than the first preset humidity, the humidifier can be turned on to increase the indoor humidity. The high humidity indoor environment can increase the release of formaldehyde from the indoor furniture into the air. The indoor temperature can be increased by increasing the compressor frequency. The high temperature and high humidity indoor environment can further promote the release of formaldehyde from the indoor furniture.

[0165] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged, and the indoor heat exchanger maintains the current heating state to ensure that the indoor temperature is not lower than the first preset temperature, and the humidifier is controlled to be turned on at the same time.

[0166] The controller controls the humidifier to increase the indoor humidity. The high humidity indoor environment can increase the release of formaldehyde from indoor furniture into the air. The indoor temperature can be increased by heating with the indoor heat exchanger. The high temperature and high humidity indoor environment can further promote the release of formaldehyde from indoor furniture.

[0167] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged, and the indoor heat exchanger maintains the current heating state to ensure that the indoor temperature is not lower than the first preset temperature, and to avoid the change of the operating frequency of the compressor causing higher energy consumption. The operating state of the humidifier is controlled to remain unchanged, and the heat exchange fan is controlled to operate at the upper limit of the rated power range of the heat exchange fan.

[0168] The controller controls the humidifier to increase the indoor humidity. The high humidity indoor environment can increase the release of formaldehyde from indoor furniture into the air. The indoor temperature can be increased by heating with the indoor heat exchanger. The high temperature and high humidity indoor environment can further promote the release of formaldehyde from indoor furniture.

[0169] Controlling the heat exchange fan to operate at the upper limit of the rated power range of the heat exchange fan can promote indoor air flow and improve heat exchange between indoor air and indoor heat exchanger, thereby promoting the increase of indoor temperature and continuously heating the indoor air, while keeping the compressor operating frequency unchanged.

[0170] In some embodiments, a formaldehyde removal cycle includes: when the formaldehyde removal mode is turned on, when the human sensor detects that there is no one in the room, if the indoor heat exchanger of the air conditioner indoor unit works as an evaporator at this time, the controller controls the indoor heat exchanger to switch to work as a condenser, and controls the inner and outer air guide plates to rotate to the minimum wind blocking position. At the same time, the controller controls to determine whether the indoor temperature is lower than the first preset temperature and whether the indoor humidity is lower than the first preset humidity.

[0171] Control the inner and outer air guide plates to rotate to the minimum wind blocking position to reduce the resistance of indoor air flowing out of the heat exchange outlet, improve the disturbance effect of the air conditioner on the indoor air, and at the same time, when the indoor air flows through the indoor heat exchanger, the air conditioner heats the indoor air and increases the indoor temperature to facilitate the release of formaldehyde in indoor furniture into the air.

[0172] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operation frequency of the compressor is controlled to be increased.

[0173] The controller increases the heat exchange of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows into the room through the heat exchange air outlet, thereby increasing the indoor temperature. The indoor high temperature and high humidity indoor environment can further promote the release of formaldehyde in indoor furniture.

[0174] When the indoor temperature sensor detects that the indoor temperature is lower than the first preset temperature and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the controller controls to increase the operating frequency of the compressor and to turn on the humidifier.

[0175] The controller increases the heat exchange of the indoor heat exchanger by controlling the frequency of the compressor, so that when the indoor air flows through the indoor heat exchanger, the indoor air is heated by the indoor heat exchanger, and the heated indoor air flows into the room through the heat exchange outlet, thereby increasing the indoor temperature.

[0176] When the indoor humidity is lower than the first preset humidity, the humidifier can be turned on to increase the indoor humidity. The high humidity indoor environment can increase the release of formaldehyde from the indoor furniture into the air. The indoor temperature can be increased by increasing the compressor frequency. The high temperature and high humidity indoor environment can further promote the release of formaldehyde from the indoor furniture.

[0177] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged, and the indoor heat exchanger maintains the current heating state to ensure that the indoor temperature is not lower than the first preset temperature, and the humidifier is controlled to be turned on at the same time.

[0178] The controller controls the humidifier to increase the indoor humidity. The high humidity indoor environment can increase the release of formaldehyde from indoor furniture into the air. The indoor temperature can be increased by heating with the indoor heat exchanger. The high temperature and high humidity indoor environment can further promote the release of formaldehyde from indoor furniture.

[0179] When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged, and the indoor heat exchanger maintains the current heating state to ensure that the indoor temperature is not lower than the first preset temperature, and to avoid the change of the operating frequency of the compressor causing higher energy consumption. The operating state of the humidifier is controlled to remain unchanged, and the heat exchange fan is controlled to operate at the upper limit of the rated power range of the heat exchange fan.

[0180] The controller controls the humidifier to increase the indoor humidity. The high humidity indoor environment can increase the release of formaldehyde from indoor furniture into the air. The indoor temperature can be increased by heating with the indoor heat exchanger. The high temperature and high humidity indoor environment can further promote the release of formaldehyde from indoor furniture.

[0181] Controlling the heat exchange fan to operate at the upper limit of the rated power range of the heat exchange fan can promote indoor air flow and improve heat exchange between indoor air and indoor heat exchanger, thereby promoting the increase of indoor temperature and continuously heating the indoor air, while keeping the compressor operating frequency unchanged.

[0182] When the formaldehyde removal mode is turned on, the human sensor detects that there is no one indoors, and the indoor heat exchanger works as a condenser. When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than the first preset humidity.

[0183] The operating frequency of the compressor is controlled to remain unchanged, and the operating status of the humidifier and the heat exchange fan is controlled to remain unchanged to maintain a high temperature and high humidity indoor environment, thereby promoting the continuous release of formaldehyde in furniture and home decoration into the air.

[0184] After the second preset time, when the indoor formaldehyde concentration is relatively high, the fresh air fan is controlled to reverse and run at a high speed at the upper limit of the rated power range of the fresh air fan to discharge the high-concentration formaldehyde in the room to the outdoors.

[0185] The high-speed reverse operation of the fresh air fan can quickly discharge indoor formaldehyde to the outside compared to the forward rotation of the fresh air fan, thus removing formaldehyde efficiently. Since there is no one indoors, there is no need to consider the discomfort caused to users by the large indoor temperature fluctuations caused by the rapid discharge of indoor air to the outside.

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

[0187] When it is detected that the indoor formaldehyde concentration is lower than the second preset concentration, the fresh air fan and the humidifier are controlled to stop running, and the compressor and the heat exchange fan are controlled to maintain the current operating state unchanged, at which time a formaldehyde removal cycle ends.

[0188] After the fresh air fan reverses and runs for the third preset time, the indoor formaldehyde concentration is further reduced. At this time, the fresh air fan and humidifier are controlled to stop running, thereby saving energy consumption when the air conditioner indoor unit is running, and the compressor and heat exchange fan are controlled to maintain the current operating state unchanged, which can avoid the problem of excessive energy consumption caused by frequent changes in the operating frequency of the compressor. The third preset time can be set to one hour.

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

[0190] After the fresh air fan continues to reverse and run for the fourth preset time, the indoor formaldehyde concentration is further reduced. At this time, the fresh air fan and the humidifier are controlled to stop running, thereby saving energy consumption when the air-conditioning indoor unit is running. The compressor and the heat exchange fan are controlled to maintain the current operating state unchanged, which can avoid the problem of excessive energy consumption caused by frequent changes in the operating frequency of the compressor.

[0191] When one formaldehyde removal cycle is completed, the next formaldehyde removal cycle is immediately entered.

[0192] When the formaldehyde removal mode is running, the human sensor detects that the user returns home again, and the room changes from an unmanned state to a occupied state. The controller controls the compressor and humidifier to switch to the operating state before the formaldehyde removal mode is turned on, controls the heat exchange fan to operate at the upper limit of the rated power range of the heat exchange fan, and controls the fresh air fan to operate at the upper limit of the rated power range of the fresh air fan.

[0193] The controller controls the compressor and the humidifier to switch to the operating state before the formaldehyde removal mode is turned on to ensure that the indoor humidity and indoor temperature are the temperature and humidity suitable for the user.

[0194] The controller controls the heat exchange fan to operate at the upper limit of the rated power range of the heat exchange fan, and controls the fresh air fan to operate at the upper limit of the rated power range of the fresh air fan, so that the speeds of the heat exchange fan and the fresh air fan are both maintained at the maximum speed, and the inner air guide plate and the outer air guide plate are switched to the wind-avoiding position, so that the indoor formaldehyde concentration is reduced to below the second preset concentration as soon as possible, thereby preventing the indoor formaldehyde from causing harm to indoor users.

[0195] When the indoor formaldehyde concentration is lower than the second preset concentration, the operating power of the heat exchange fan and the fresh air fan is controlled to be reduced, thereby saving energy consumption during the operation of the air conditioner indoor unit.

[0196] It can be set that when the indoor formaldehyde concentration is not lower than the second preset concentration, the command from the user will be blocked and will not take any effect. The controller will not respond to the user's command until the indoor formaldehyde concentration is lower than the second preset concentration. It should be noted that when the indoor formaldehyde concentration is not lower than the second preset concentration, if the user performs an interfering operation, there will be a corresponding reminder, including a voice reminder or a software prompt of the smart interconnection. The user needs to wait until the indoor formaldehyde concentration is lower than the second preset concentration before the user can perform the operation.

[0197] When the formaldehyde removal mode is running, the human sensor detects that there is no one in the room. When the controller receives a command to turn off the formaldehyde removal mode, it controls the heat exchange fan to run at a third power and low speed lower than the upper limit of its rated power, and controls the compressor to run at a fourth power and low frequency lower than the upper limit of its rated power, thereby reducing the heat exchange capacity of the indoor heat exchanger and further reducing the indoor temperature to a level suitable for users. The fresh air fan is controlled to run in reverse at a high speed to discharge the residual formaldehyde in the room to the outside.

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

[0199] When the air conditioner 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

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

[0206] The fresh air fan is switched to forward medium-speed operation to prevent the rapid introduction of a large amount of outdoor air from causing a large impact on the heat load of the indoor space and causing human discomfort.

[0207] At the same time, the dehumidification mode is controlled to start and run, and the indoor humidity is adjusted to the most comfortable humidity value corresponding to the user-set temperature. The most comfortable humidity value is defined as the second humidity. What can be set is that the controller integrates the preset second humidity corresponding to various temperatures. When the indoor humidity reaches the second humidity, the dehumidification mode is controlled to stop, and the heat exchanger working mode is switched to the windless mode to avoid the discomfort caused by the air conditioner blowing directly to the user.

[0208] When the compressor stops running, the user turns on the formaldehyde removal mode. At this time, the controller receives the command to turn on the formaldehyde removal mode. The controller controls the air-conditioning indoor unit to issue a prompt, thereby reminding the user to turn on the air-conditioning first, and then turn on the formaldehyde removal mode, so that the formaldehyde removal mode cannot be started alone, so as to facilitate the normal operation of the formaldehyde removal mode.

[0209] It can be set that, in some embodiments, a reminder sticker can be set on the control panel of the housing 100, or when the user turns on the formaldehyde removal function separately on the control software corresponding to the air conditioner indoor unit, a corresponding prompt message will pop up on the control software. The prompt message can be set to "Please turn on the air conditioner first", so as to remind the user that the air conditioner needs to be turned on first when the formaldehyde removal mode is correctly operated.

[0210] See also Figure 1-Figure 20In some embodiments, the air conditioner indoor unit is further provided with a formaldehyde removal module, which is used to remove formaldehyde in the indoor air. The formaldehyde removal module removes formaldehyde in the indoor air by means of 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.

[0211] The air conditioner is equipped with a formaldehyde removal module. When the formaldehyde removal mode is turned on, when the human sensor detects that there is someone in the room, the formaldehyde removal module is controlled to be turned on so that the indoor air flows through the formaldehyde removal module. When the human sensor detects that there is no one in the room, the formaldehyde removal module is controlled to be turned off so that the indoor air does not flow through the formaldehyde removal module, thereby increasing the service life of the formaldehyde removal module.

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

[0213] A formaldehyde removal cycle includes: when the formaldehyde removal mode is turned on, when the human sensor detects that there is someone in the room, the formaldehyde removal module is controlled to turn on so that the indoor air flows through the formaldehyde removal module to improve the formaldehyde removal effect.

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

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

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

[0217] When the indoor humidity is not lower than the first humidity, it means that the indoor humidity has reached the optimal humidity suitable for the release of formaldehyde in furniture and home decoration. The controller controls the humidifier to keep the current operating state unchanged, and can maintain a high humidity environment indoors. The high humidity indoor environment can increase the release of formaldehyde in the indoor furniture into the air, while preventing the temperature from rising and causing discomfort to the user.

[0218] The fresh air fan runs at the medium speed of the first power to prevent large fluctuations in indoor temperature differences caused by excessive introduction of outdoor fresh air when the outdoor temperature is low, which in turn causes discomfort to the human body.

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

[0220] When the indoor humidity is lower than the first humidity, it means that the indoor humidity has not reached the optimal humidity suitable for the release of formaldehyde in furniture and home furnishings. The controller controls the humidifier to operate at a second power lower than the upper limit of the rated power range of the humidifier, so that the indoor humidity can rise to the first humidity. By increasing the indoor humidity, the release of formaldehyde in the indoor furniture and home furnishings into the air can be increased. At the same time, controlling the temperature to maintain the first temperature can prevent the temperature increase from causing discomfort to the user.

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

[0222] After receiving the command to start the formaldehyde removal mode, the controller still operates with the temperature currently set by the user as the highest priority, so as to avoid discomfort to the user caused by changes in indoor temperature control when the dehumidification program is running.

[0223] When the formaldehyde removal mode is turned on, after the formaldehyde removal mode runs for the first time, the indoor formaldehyde concentration is detected. When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than the second preset concentration, the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and heat exchange fan are controlled to maintain the current operating state unchanged. At this time, a formaldehyde removal cycle ends.

[0224] After the first period of time, the indoor formaldehyde concentration is detected. When the indoor formaldehyde concentration is lower than the second preset concentration, it means that the indoor formaldehyde concentration is low and will not cause harm to the human body. At this time, the fresh air fan and humidifier are controlled to stop running, thereby saving energy consumption during the operation of the air-conditioning indoor unit. The compressor and the heat exchange fan are controlled to maintain the current operating state unchanged, which can avoid the problem of excessive energy consumption caused by frequent changes in the operating frequency of the compressor.

[0225] Among them, the first duration can be set to 1.5 hours. Under normal circumstances, the best temperature and humidity environment for the human body indoors is generally 25°C, and the relative humidity is about 50%. Under this condition, it takes about 1.5 hours for the fresh air fan to replace the indoor air once.

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

[0227] After the first period of time, when the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than the second preset concentration, it means that the indoor formaldehyde concentration is still not lower than the safety value. The fresh air fan, humidifier, compressor and heat exchange fan are controlled to maintain the current state and continue to run for the first preset time to promote the release of indoor formaldehyde and discharge the indoor formaldehyde to the outside.

[0228] After the first preset time, the indoor formaldehyde concentration is further reduced. At this time, the fresh air fan and humidifier are controlled to stop running, thereby saving energy consumption during the operation of the air-conditioning indoor unit. The compressor and heat exchange fan are controlled to maintain the current operating state unchanged, which can avoid the problem of excessive energy consumption caused by frequent changes in the operating frequency of the compressor.

[0229] 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, characterized in that: include: An air conditioner indoor unit, comprising: The shell is provided with a heat exchange outlet; An indoor heat exchanger is arranged inside the shell, and the refrigerant flowing inside the indoor heat exchanger exchanges heat with the indoor air to form a heating cycle or a cooling cycle, and the indoor air flows to the outside of the shell through the heat exchange outlet after the heat exchange; A heat exchange fan, used to drive the indoor air to be transported to the indoor through the heat exchange air outlet; a humidifier disposed in the housing, the humidifier being used to generate steam to flow to the outside of the housing; Human sensor, used to detect whether there is someone in the room; Indoor temperature sensor, used to detect indoor temperature; Indoor humidity sensor, used to detect indoor humidity; A fresh air fan is arranged in the housing, and when the fresh air fan rotates forward, it drives outdoor air to enter the room through the fresh air fan, and when the fresh air fan rotates reversely, it drives indoor air to be discharged to the outside through the fresh air fan; The controller is configured to: detect that there is someone in the room through the human sensor, and when the indoor heat exchanger works as a condenser, define the indoor temperature currently set by the air-conditioning indoor unit as a first temperature, and set a first humidity corresponding to the first temperature in the controller; When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to maintain the current operating state unchanged, and the fresh air fan is controlled to run forward at a first power lower than the upper limit of the rated power range of the fresh air fan; When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to operate at a second power lower than an upper limit value of a rated power range of the humidifier.

2. The air conditioner according to claim 1, characterized in that: Also includes: Formaldehyde concentration sensor, used to detect indoor formaldehyde concentration; An air conditioner outdoor unit, which at least includes a compressor, and the compressor is connected to the indoor heat exchanger through a refrigerant circuit; The controller is configured as: When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is lower than a second preset concentration, the fresh air blower is controlled to stop running, the humidifier is controlled to stop running, and the compressor and the heat exchange blower are controlled to maintain the current operating state unchanged.

3. The air conditioner according to claim 2, characterized in that: The controller is configured as: When the formaldehyde concentration sensor detects that the indoor formaldehyde concentration is not lower than a second preset concentration, the fresh air fan, the humidifier, the compressor and the heat exchange fan are controlled to maintain the current operation state for a first preset time, and then the fresh air fan is controlled to stop running, the humidifier is controlled to stop running, and the compressor and the heat exchange fan are controlled to maintain the current operating state unchanged.

4. The air conditioner according to claim 2, characterized in that: The controller is configured as: When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser; When the indoor temperature sensor detects that the indoor temperature is lower than a first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than a first preset humidity, the operating frequency of the compressor is controlled to be increased.

5. The air conditioner according to claim 2, characterized in that: The controller is configured as: When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser; When the indoor temperature sensor detects that the indoor temperature is lower than a first preset temperature and the indoor humidity sensor detects that the indoor humidity is lower than a first preset humidity, the operating frequency of the compressor is controlled to be increased and the humidifier is controlled to be turned on.

6. The air conditioner according to claim 2, characterized in that: The controller is configured as: When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser; When the indoor temperature sensor detects that the indoor temperature is not lower than the first preset temperature and the indoor humidity sensor detects that the indoor humidity is lower than the first preset humidity, the operating frequency of the compressor is controlled to remain unchanged and the humidifier is controlled to be turned on.

7. The air conditioner according to claim 2, characterized in that: The controller is configured as: When the human sensor detects that there is no one in the room and the indoor heat exchanger works as a condenser; When the indoor temperature sensor detects that the indoor temperature is not lower than a first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than a first preset humidity, the operating frequency of the compressor is controlled to remain unchanged, the operating state of the humidifier is controlled to remain unchanged, and the heat exchange fan is controlled to operate at the upper limit of the rated power range of the heat exchange fan.

8. The air conditioner according to claim 2, characterized in that: The controller is configured as: The human sensor detects that there is no one in the room, the indoor temperature sensor detects that the indoor temperature is not lower than a first preset temperature, and the indoor humidity sensor detects that the indoor humidity is not lower than a first preset humidity; Controlling the operating frequency of the compressor to remain unchanged, and controlling the operating states of the humidifier and the heat exchange fan to remain unchanged; After a second preset time, the fresh air fan is controlled to reversely operate at an upper limit value of the rated power range of the fresh air fan.

9. The air conditioner according to claim 8, characterized in that: After a second preset time has passed, the fresh air fan is controlled to reversely run at an upper limit value of the rated power range of the fresh air fan for a third preset time, and the formaldehyde concentration sensor is controlled to detect the indoor formaldehyde concentration; When it is detected that the indoor formaldehyde concentration is lower than a second preset concentration, the fresh air blower and the humidifier are controlled to stop running, and the compressor and the heat exchange blower are controlled to maintain the current operating state unchanged.

10. An air conditioner, characterized in that: include: An air conditioner indoor unit, comprising: The shell is provided with a heat exchange outlet; An indoor heat exchanger is arranged inside the shell, and the refrigerant flowing inside the indoor heat exchanger exchanges heat with the indoor air to form a heating cycle or a cooling cycle, and the indoor air flows to the outside of the shell through the heat exchange outlet after the heat exchange; A heat exchange fan, used to drive the indoor air to be transported to the indoor through the heat exchange air outlet; a humidifier disposed in the housing, the humidifier being used to generate steam to flow to the outside of the housing; A formaldehyde removal module, used to remove formaldehyde in the air flowing through the formaldehyde removal module; Human sensor, used to detect whether there is someone in the room; Indoor temperature sensor, used to detect indoor temperature; Indoor humidity sensor, used to detect indoor humidity; A fresh air fan is arranged in the housing, and when the fresh air fan rotates forward, it drives outdoor air to enter the room through the fresh air fan, and when the fresh air fan rotates reversely, it drives indoor air to be discharged to the outside through the fresh air fan; The controller is configured as: Detecting that there is someone in the room by a human sensor, controlling the formaldehyde removal module to turn on so that indoor air flows through the formaldehyde removal module; When the indoor heat exchanger works as a condenser, the indoor temperature currently set by the air-conditioning indoor unit is defined as a first temperature, and a first humidity corresponding to the first temperature is set in the controller; When the indoor humidity sensor detects that the indoor humidity is not lower than the first humidity, the humidifier is controlled to maintain the current operating state unchanged, and the fresh air fan is controlled to run forward at a first power lower than the upper limit of the rated power range of the fresh air fan; When the indoor humidity sensor detects that the indoor humidity is lower than the first humidity, the humidifier is controlled to operate at a second power lower than an upper limit value of a rated power range of the humidifier.

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