Air conditioner

Abstract

The present application relates to an air conditioner, and belongs to the technical field of air conditioning equipment. The air conditioner comprises an indoor unit, an air conditioner fan, an indoor heat exchanger, a fresh air fan, an indoor temperature sensor, an aldehyde removal component, an outdoor temperature sensor and a controller. The air conditioner fan delivers air conditioning air to the indoor unit. The indoor heat exchanger increases or decreases the temperature of the air conditioning air delivered to the indoor unit. The fresh air fan delivers outdoor fresh air to the indoor unit. The indoor temperature sensor detects the indoor temperature. The aldehyde removal component adsorbs formaldehyde. The outdoor temperature sensor detects the outdoor temperature. The controller is configured to: when the air conditioner operates in a formaldehyde removal mode, the outdoor temperature sensor detects the outdoor temperature; when the outdoor temperature reaches a first preset outdoor temperature and is below a second preset outdoor temperature, the indoor heat exchanger performs a heating cycle to make the indoor temperature reach a first set temperature, and formaldehyde is precipitated at a first speed; and the air conditioner fan sucks indoor air and re-outputs the air to the indoor unit after adsorbing the formaldehyde in the air conditioning air through the aldehyde removal component.

Description

TECHNICAL FIELD

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

[0002] Formaldehyde is considered a carcinogen, which seriously endangers human health. Formaldehyde is found in most general decoration materials. The initial formaldehyde concentration is high after the decoration of a new house, which is not suitable for living and needs to be aired. Ventilation is the most effective and economical method for removing formaldehyde, but the release of formaldehyde is a long-term and slow process. The release speed is slow in natural ventilation, especially at low ambient temperature. The release is even stopped at too low temperature. An air conditioner is a device for artificially adjusting and controlling the temperature, humidity, and flow rate of air in a building or structure. A fresh air conditioner is a healthy and comfortable air conditioner with a fresh air function. It uses a centrifugal fan to realize the circulation and ventilation between indoor air and outdoor air, and has the function of purifying air.

[0003] The existing fresh air conditioner does not consider the application requirement of users for removing formaldehyde. The user needs to manually open the fresh air to realize indoor ventilation for removing formaldehyde. The room using the fresh air system to remove formaldehyde is usually unattended. The user can only simply turn on the fresh air system for a long time, or turn on the air conditioner system for heating at the same time to increase the ambient temperature and promote the release of formaldehyde. To achieve the maximum removal effect, the fresh air speed is usually adjusted to the highest, and the air conditioner temperature is set to the highest. At this time, the air conditioner is in long-term high-load operation, which has a great impact on the service life and has a great energy consumption, which affects the economy. SUMMARY

[0004] The present application at least partly solves the problem of long-term high-load operation of the air conditioner for removing formaldehyde in the related art, which affects the economy.

[0005] Therefore, the present application aims to provide an air conditioner, which adjusts the temperature in the room according to the temperature outdoors to reduce energy consumption.

[0006] To achieve the above-mentioned purpose, the present application provides an air conditioner, comprising:

[0007] An indoor unit, which is provided with an air conditioner air outlet and a fresh air outlet;

[0008] An air conditioner fan, which is arranged in the indoor unit and is used to deliver air conditioner air to the room through the air conditioner air outlet;

[0009] An indoor heat exchanger, which is arranged in the indoor unit and exchanges heat between the refrigerant flowing in the indoor heat exchanger and the air to form a heating cycle or a cooling cycle, so as to increase or decrease the temperature of the air conditioner air output to the room;

[0010] a fresh air fan arranged in the indoor unit, the fresh air fan being configured to deliver outdoor fresh air to the indoor through a fresh air outlet, and to exhaust indoor air to the outdoor;

[0011] an indoor temperature sensor arranged in the indoor unit and configured to detect an indoor temperature;

[0012] an aldehyde removal component arranged in the indoor unit and configured to adsorb formaldehyde in the air conditioner air;

[0013] an outdoor unit arranged in the outdoor;

[0014] an outdoor temperature sensor arranged in the outdoor unit and configured to detect an outdoor temperature;

[0015] a controller configured to, when the air conditioner operates in the formaldehyde removal mode, detect the outdoor temperature by the outdoor temperature sensor;

[0016] when the outdoor temperature reaches a first preset outdoor temperature and is below a second preset outdoor temperature, the controller controls the indoor heat exchanger to perform a heating cycle to make the indoor temperature reach a first set temperature, to make the formaldehyde precipitate at a first speed, to reduce the indoor-outdoor temperature difference to reduce energy consumption; and the air conditioner fan sucks indoor air and re-outputs the indoor air to the indoor after adsorbing the formaldehyde in the air conditioner air by the aldehyde removal component.

[0017] In some embodiments of the present application, the controller is configured to, when the outdoor temperature reaches above the second preset outdoor temperature, control the indoor heat exchanger to perform a heating cycle to make the indoor temperature reach a second set temperature, to make the indoor formaldehyde precipitate at a second speed, to reduce the indoor-outdoor temperature difference to reduce energy consumption; and the fresh air fan operates to exhaust the indoor air with formaldehyde to the outdoor; wherein the first speed is less than the second speed.

[0018] In some embodiments of the present application, the air conditioner further comprises:

[0019] a deflector arranged on the indoor unit and close to one side of the air conditioner outlet, the deflector being configured to adjust the air direction of the air conditioner air passing through the air conditioner outlet;

[0020] a driving component configured to drive the deflector to flip;

[0021] when the outdoor temperature reaches the first preset outdoor temperature, the driving component is controlled to drive the deflector to reciprocally flip to reciprocally sweep the air conditioner air passing through the air conditioner outlet, to accelerate the indoor air flow to accelerate the speed of formaldehyde precipitation.

[0022] In some embodiments of the present application, the indoor unit is provided with a humidifier, the humidifier being configured to increase the indoor humidity to accelerate the speed of formaldehyde precipitation.

[0023] When the outdoor temperature reaches the first preset outdoor temperature, the humidifier operates to increase the indoor humidity, thereby increasing the precipitation rate of formaldehyde.

[0024] In some embodiments of the present application, the indoor unit is provided with a humidity detector for detecting the indoor humidity; the controller is configured to set a regular dehumidification set value and a formaldehyde-removing dehumidification set value, the formaldehyde-removing dehumidification set value being greater than the regular dehumidification set value; when the air conditioner enters the formaldehyde-removing mode, the humidity detector detects the indoor humidity; when the indoor humidity is greater than the formaldehyde-removing dehumidification set value, the dehumidification mode is entered.

[0025] In some embodiments of the present application, when the outdoor temperature reaches the first preset outdoor temperature, the humidifier operates to make the indoor humidity reach a preset humidity of 90% to 99%.

[0026] In some embodiments of the present application, the controller is configured to set a humidity hysteresis range; when the indoor humidity is within the humidity hysteresis range, the humidifier is controlled to stop working; and when the indoor humidity is within the humidity hysteresis range, the humidifier is turned off.

[0027] In some embodiments of the present application, when the indoor air is sucked in by the air conditioner fan and the formaldehyde in the air conditioner air is adsorbed by the formaldehyde-removing element and then output to the indoor air, the higher the indoor temperature, the greater the power of the air conditioner fan.

[0028] In some embodiments of the present application, when the indoor air containing formaldehyde is discharged to the outdoor air by the fresh air fan, the higher the indoor temperature, the greater the power of the fresh air fan.

[0029] In some embodiments of the present application, when the outdoor temperature does not reach the first preset outdoor temperature, the controller controls the air conditioner fan to enter a standby state.

[0030] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application;

[0033] Figure 3 is a front view of an air conditioner according to an embodiment of the present application;

[0034] Figure 4 is a schematic diagram of the overall structure of an air conditioner according to an embodiment of the present application;

[0035] Figure 5 is Figure 4 is an enlarged schematic diagram of part A in

[0036] Figure 6 is a flow chart of the operation of the aldehyde removal mode according to an embodiment of the present application;

[0037] Figure 7 is a flow chart of the operation of the aldehyde removal mode according to an embodiment of the present application;

[0038] Figure 8 is a flow chart of the operation of the aldehyde removal mode according to an embodiment of the present application;

[0039] Figure 9 is a flow chart of the operation of the aldehyde removal mode according to an embodiment of the present application;

[0040] Figure 10 is a timing diagram of the aldehyde removal mode according to an embodiment of the present application.

[0041] In the above figures: 100, indoor unit; 200, air conditioner air outlet; 300, fresh air outlet; 400, air deflector. DETAILED DESCRIPTION

[0042] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be 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 "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. Exemplary expressions of the above terms do not necessarily refer to the same embodiment or example in this specification, and the particular feature, structure, material, or characteristic can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine or recombine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction, as appropriate.

[0046] In the following, the present application will be specifically described through exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can be beneficially combined into other embodiments without further description.

[0047] In this application, the air conditioner performs a refrigeration cycle in its indoor unit using a compressor, condenser, expansion valve, and indoor heat exchanger. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, supplying refrigerant to conditioned and heat-exchanged air. The compressor compresses the refrigerant gas at a low temperature and low pressure, discharging it at a high temperature and high pressure. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The indoor heat exchanger evaporates the refrigerant that has expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The indoor heat exchanger achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner's indoor unit can regulate the temperature of the indoor space. The outdoor unit of an air conditioner indoor unit refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner indoor unit includes an indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit. The indoor and outdoor heat exchangers function as either condensers or indoor heat exchangers. When the indoor heat exchanger functions as a condenser, the air conditioner indoor unit acts as a heater in heating mode; when it functions as an indoor heat exchanger, the air conditioner indoor unit acts as a cooler in cooling mode.

[0048] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0049] As attached Figures 1 to 5 As shown, in one illustrative embodiment of the air conditioner of the present invention, the air conditioner includes:

[0050] The indoor unit, the air conditioner fan, the indoor heat exchanger, the fresh air fan, the indoor temperature sensor, the formaldehyde removal component, the outdoor unit and the controller, wherein the indoor unit is a vertical or hanging type and is arranged in the indoor environment, the indoor unit has a front panel, and the indoor unit is provided with an air conditioner air outlet and a fresh air outlet; the air conditioner air outlet and the fresh air outlet are arranged on the front panel of the indoor unit, and the air conditioner air outlet and the fresh air outlet are arranged at intervals; the air conditioner fan is arranged in the indoor unit, and the air conditioner fan is used for conveying the air conditioner air to the indoor environment through the air conditioner air outlet; the indoor unit is internally provided with an air conditioner air duct, the air conditioner air duct is in communication with the air conditioner air outlet, the air conditioner fan is in communication with the air conditioner air duct, and the air conditioner fan is used for conveying the air in the air conditioner air duct to the indoor environment through the air conditioner air outlet when the air conditioner fan is in operation; the indoor heat exchanger is arranged in the indoor unit, and the indoor heat exchanger exchanges heat between the refrigerant flowing in the indoor heat exchanger and the air to form a heating cycle or a refrigeration cycle, so as to increase or decrease the temperature of the air conditioner air output to the indoor environment; the indoor heat exchanger is arranged on the air inlet side of the air conditioner fan, and the indoor heat exchanger is used for increasing or decreasing the temperature of the air, so as to change the temperature of the air conditioner air entering the indoor environment and change the indoor temperature; the fresh air fan is arranged in the indoor unit, the indoor unit is internally provided with a fresh air duct, one end of the fresh air duct is in communication with the fresh air outlet, and the other end of the fresh air duct is in communication with the outdoor environment; the fresh air fan is used for conveying the outdoor fresh air to the indoor environment through the fresh air duct and the fresh air outlet, so as to discharge the indoor air to the outdoor environment; the indoor temperature sensor is arranged in the indoor unit and is used for detecting the indoor temperature; the formaldehyde removal component is arranged in the indoor unit and is arranged in the air conditioner air duct, and the formaldehyde in the air conditioner air passing through the air conditioner air duct is adsorbed by the formaldehyde removal component and then output to the indoor environment; the outdoor unit is arranged in the outdoor environment, and the outdoor temperature sensor is arranged in the outdoor unit and is used for detecting the outdoor temperature; the air conditioner further comprises a compressor, the compressor is connected with the indoor heat exchanger, and the flow rate of the refrigerant is controlled by the compressor to change the temperature of the indoor heat exchanger, so as to change the temperature of the air conditioner air.

[0051] Please refer to Figure 6 , the controller is configured to: the air conditioner runs the formaldehyde removal mode (step S1), the outdoor temperature sensor detects the outdoor temperature (step S2); it is judged whether the current outdoor temperature reaches the first preset outdoor temperature (step S3). Whether the current outdoor temperature reaches the first preset outdoor temperature, the current outdoor temperature reaches the first preset outdoor temperature and enters step S4. It is judged whether the outdoor temperature reaches the second preset outdoor temperature (step S5), when the outdoor temperature is below the second preset outdoor temperature, step S6 and S7 are entered. The controller controls the indoor heat exchanger to perform the heating cycle to make the indoor temperature reach the first set temperature (step S6), so that the formaldehyde is precipitated at the first speed, the indoor and outdoor temperature difference is reduced to reduce the energy consumption; the air conditioner fan inhales the indoor air and reoutputs the indoor air to the indoor environment after the formaldehyde in the air conditioner air is adsorbed by the formaldehyde removal component.

[0052] Please refer to Figure 6 and Figure 10, at present, when the house is decorated or renovated, the indoor furniture and the board are influenced by a large amount of formaldehyde, which affects human health. When the existing air conditioner discharges indoor formaldehyde, it usually uses the air conditioner to heat the indoor and discharges or adsorbs formaldehyde through fresh air or activated carbon. However, in this way, in order to ensure that the indoor temperature can be raised enough, the indoor temperature is heated at the highest setting temperature, which consumes a lot of energy and is poor in economy. The air conditioner of the scheme uses the outdoor temperature sensor to detect the outdoor temperature, and when the outdoor temperature reaches the first preset outdoor temperature and is below the second preset outdoor temperature, the controller controls the indoor heat exchanger to heat cycle to make the indoor temperature reach the first set temperature. According to the temperature of the outdoor, the temperature of the indoor is adjusted, avoiding the compressor directly entering high load operation, saving energy. Formaldehyde is precipitated at a first speed, the indoor and outdoor temperature difference is reduced to reduce energy consumption; the air conditioner fan inhales indoor air and adsorbs formaldehyde in the air conditioner wind through the formaldehyde removal element and then outputs to the indoor, completing the removal of formaldehyde, reducing the formaldehyde content in the indoor air, while ensuring the formaldehyde removal efficiency, reducing the energy consumption.

[0053] In some embodiments, an outdoor heat exchanger is arranged inside the outdoor unit. The outdoor heat exchanger is in communication with the indoor heat exchanger and the compressor. The compressor compresses the refrigerant and passes through the indoor heat exchanger and the outdoor heat exchanger, and the temperature of the air conditioner wind is increased or decreased through the evaporation or condensation of the indoor heat exchanger and the outdoor heat exchanger, and the power of the compressor is changed to change the temperature of the air conditioner wind passing through the indoor heat exchanger.

[0054] In some embodiments, when the outdoor temperature does not reach the first preset outdoor temperature, the controller controls the air conditioner fan to enter the standby state. Because the indoor temperature is inevitably proportional to the outdoor temperature, when the outdoor temperature is low, the indoor temperature will also be low, which is not conducive to the precipitation of formaldehyde in furniture or board. And when the indoor is heated, the compressor needs to run at high power to raise the indoor temperature as high as possible, so a lot of energy is consumed. Therefore, in this scheme, when the outdoor temperature is low, the indoor heat exchanger and the air conditioner fan do not work, so as to avoid excessive energy consumption.

[0055] In some embodiments, the first preset outdoor temperature can be selected according to the application scene, for example, the outdoor temperature is lower than the first preset outdoor temperature at night, and the outdoor temperature is higher than the first preset outdoor temperature during the day.

[0056] In some embodiments, the first preset outdoor temperature is greater than or equal to 5℃ and less than or equal to 10℃. In some embodiments, according to the average level of temperature in China, the first preset outdoor temperature is set to 10℃.

[0057] In some embodiments, the second set temperature is greater than or equal to 20℃ and less than or equal to 30℃.

[0058] Please refer to Figure 9In some embodiments, when the outdoor temperature reaches the first preset outdoor temperature and is below the second preset outdoor temperature, the first set temperature is the outdoor temperature plus a first increment temperature. The first increment temperature is greater than or equal to 5°C and less than or equal to 10°C. For example, when the outdoor temperature is 25°C and the first increment temperature is 8°C, the first set temperature is 25°C + 8°C = 33°C.

[0059] Please refer to Figure 6 and Figure 9 In some embodiments, when the outdoor temperature reaches above the second preset outdoor temperature, the controller enters steps S8 and S9, the controller controls the indoor heat exchanger to perform a heating cycle to make the indoor temperature reach a second set temperature (step S8) to make the indoor formaldehyde precipitate at a second speed, and reduce the indoor-outdoor temperature difference to reduce energy consumption; the fresh air fan operates to discharge the indoor air containing formaldehyde to the outdoor (step S9); wherein the first speed is less than the second speed. When the outdoor temperature reaches above the second preset outdoor temperature, the indoor temperature is also in a higher state, and at this indoor temperature, the formaldehyde in the indoor furniture or board precipitates at a faster rate. At this time, the controller controls the indoor heat exchanger to perform a heating cycle to make the indoor temperature reach the second set temperature, and the second set temperature is greater than the first set temperature, so that the formaldehyde in the furniture or board precipitates at a faster rate. And when the outdoor temperature reaches above the second preset outdoor temperature, the temperature in the room has reached a higher standard, so the compressor only needs a small additional power to make the indoor temperature reach the second set temperature, thereby improving the formaldehyde removal effect while reducing the power burden of the compressor as much as possible and saving energy consumption. And under this condition, that is, when the outdoor temperature reaches above the second preset outdoor temperature, the way to remove indoor formaldehyde becomes fresh air circulation to discharge the indoor air containing formaldehyde to the outdoor. Because the outdoor temperature reaches above the second preset outdoor temperature, it means that the outdoor temperature has reached a high temperature, so even if the outdoor air enters the indoor, it will not have a great impact on the indoor temperature, and the formaldehyde precipitation rate can still be guaranteed. Therefore, the outdoor fresh air is output to the indoor through the fresh air outlet by the fresh air fan to discharge the indoor air containing formaldehyde to the outdoor, which not only saves energy consumption, but also completely removes formaldehyde to ensure human health.

[0060] In some embodiments, when the outdoor temperature reaches above the second preset outdoor temperature, the second set temperature is the outdoor temperature plus a second increment temperature, wherein the second increment temperature is greater than or equal to 5°C and less than or equal to 15°C. It is worth noting that, in order to avoid the risk of fire caused by the second set temperature being too high, the second set temperature is not higher than 50°C. That is, when the outdoor temperature plus the second increment temperature exceeds 50°C, the second set temperature is 50°C.

[0061] Please refer to Figure 7 , Figure 8 andFigure 9 In some embodiments, the air conditioner further comprises a deflector and a driving member, wherein the deflector is arranged on the indoor unit and close to one side of the air outlet of the air conditioner, and is used to adjust the direction of the air of the air conditioner passing through the air outlet of the air conditioner; the driving member is used to drive the deflector to turn over; when the outdoor temperature reaches the first preset outdoor temperature, the driving member is controlled to drive the deflector to turn over reciprocally to make the air of the air conditioner passing through the air outlet of the air conditioner sweep reciprocally, so as to accelerate the indoor air flow to accelerate the release rate of formaldehyde.

[0062] In some embodiments, the driving member includes but is not limited to a motor and a motor. The driving member is arranged on the indoor unit, and the output shaft of the driving member is connected with the deflector. The controller is electrically connected with the driving member. When the air blower of the air conditioner is started, the controller synchronously controls the output shaft of the driving member to turn over reciprocally, so as to realize the reciprocating movement of the deflector. The air of the air conditioner passing through the deflector is blown in the room, so as to accelerate the air flow speed around the furniture or the board to accelerate the release rate of formaldehyde from the clamps or the boards.

[0063] Please refer to Figure 7 , Figure 8 and Figure 9 In some embodiments, a humidifier is arranged in the indoor unit, and is used to increase the indoor humidity to accelerate the release rate of formaldehyde. When the outdoor temperature reaches the first preset outdoor temperature, the humidifier is operated to increase the indoor humidity (step S4), so as to increase the release rate of formaldehyde. The higher the humidity of the environment where the formaldehyde is located, the higher the release rate of the formaldehyde. Therefore, when the air blower of the air conditioner is working, the controller controls the humidifier to operate to humidify the room.

[0064] In some embodiments, a water tank containing water is arranged in the indoor unit, and the water tank is communicated with the humidifier. When the humidifier is started, the water in the water tank is atomized and input into the room.

[0065] Please refer to Figure 7 , Figure 8 and Figure 9 In some embodiments, a humidity detector is arranged in the indoor unit, and is used to detect the indoor humidity. The controller is configured to set a normal dehumidification setting value and a dehumidification setting value for removing formaldehyde, and the dehumidification setting value for removing formaldehyde is greater than the normal dehumidification setting value. When the air conditioner enters the formaldehyde removal mode, the humidity detector detects the indoor humidity. When the indoor humidity is greater than the dehumidification setting value for removing formaldehyde, the dehumidification mode is entered. After entering the formaldehyde removal mode, the dehumidification setting value for removing formaldehyde replaces the normal dehumidification setting value. Therefore, even if the indoor humidity increases, the air conditioner will not enter the dehumidification mode, so as to ensure that the indoor humidity always increases to increase the release rate of formaldehyde.

[0066] In some embodiments, when the outdoor temperature reaches the first preset outdoor temperature, the humidifier operates to make the indoor reach the preset humidity, and the preset humidity is 90% to 99%. That is, after the humidifier operates, the humidifier humidifies the indoor to a humidity value between 90% to 99% to as high as possible to improve the indoor humidity and maximize the increase of the formaldehyde release rate.

[0067] In some embodiments, the indoor unit is internally provided with a humidity detector for detecting the indoor humidity. The controller is configured to set a humidity hysteresis range, and when the indoor humidity is within the humidity hysteresis range, the humidifier is controlled to stop working; and when the indoor humidity is within the humidity hysteresis range, the humidifier is closed. The humidity detector detects the indoor humidity. When the indoor humidity reaches the preset humidity, the humidifier stops. However, after the humidifier stops, the indoor humidity will change constantly. Taking the preset humidity of 90% as an example, when the humidity detector detects that the indoor humidity reaches 90%, the humidifier is controlled to be closed, but the indoor humidity will be lower than 90% within a few seconds after the humidifier is closed, at which time the humidifier is turned on to humidify the indoor, and the indoor humidity reaches 90% again within a few seconds after the humidifier is turned on, the humidifier is controlled to be closed, and the above actions are repeated. Therefore, in order to avoid the frequent start and stop of the humidifier, the humidity hysteresis range is set, which is the preset humidity plus the humidity hysteresis value. The humidity hysteresis value is greater than or equal to 5% and less than or equal to 10%. Taking the preset humidity of 90% and the humidity hysteresis value of 5% as an example, when the humidity detector detects that the indoor humidity is between 90% and 95%, the humidifier is closed and stopped working.

[0068] In some embodiments, when the air conditioner fan sucks the indoor air and outputs it to the indoor after the formaldehyde in the air conditioner air is adsorbed by the formaldehyde removal element (step S7), the higher the indoor temperature, the greater the power of the air conditioner fan. The higher the indoor temperature, the more formaldehyde in the air, so the air volume of the air conditioner air needs to be larger to ensure that the formaldehyde can be adsorbed by the formaldehyde removal element.

[0069] Please refer to Figure 9In some embodiments, when the air conditioner fan inhales indoor air and outputs the air conditioner air to the indoor after adsorbing formaldehyde in the air conditioner air by the formaldehyde removal element, the rotation speed of the air conditioner fan is the air conditioner rotation speed level multiplied by the indoor temperature. The air conditioner rotation speed level is greater than or equal to 10 and less than or equal to 40, and the air conditioner rotation speed level is determined according to actual conditions. For example, when the indoor temperature is 25°C and the air conditioner rotation speed level is 40, the rotation speed of the air conditioner fan is 25 x 40 = 1000 rpm. It is worth noting that the rotation speed of the air conditioner fan is at least 200 rpm and at most 1200 rpm. Therefore, when the calculated rotation speed of the air conditioner fan is less than 200 rpm, the air conditioner fan operates at 200 rpm; when the calculated rotation speed of the air conditioner fan is greater than 1200 rpm, the air conditioner fan operates at 1200 rpm. This scheme adjusts the rotation speed of the air conditioner fan according to the demand, while ensuring the formaldehyde removal effect, and reduces the energy consumption.

[0070] In some embodiments, when the fresh air fan operates to discharge indoor air containing formaldehyde to the outdoor (step S9), the higher the indoor temperature, the greater the power of the fresh air fan. The higher the indoor temperature, the more formaldehyde in the air, so the greater the air volume of fresh air is needed to ensure that the formaldehyde can be discharged.

[0071] In some embodiments, when the fresh air fan operates to discharge indoor air containing formaldehyde to the outdoor, the rotation speed of the fresh air fan is the fresh air rotation speed level multiplied by the indoor temperature. The fresh air rotation speed level is greater than or equal to 8 and less than or equal to 30, and the fresh air rotation speed level is determined according to actual conditions. For example, when the indoor temperature is 40°C and the air conditioner rotation speed level is 20, the rotation speed of the air conditioner fan is 40 x 20 = 800 rpm. This scheme adjusts the rotation speed of the fresh air fan according to the demand, while ensuring the formaldehyde removal effect, and reduces the energy consumption.

[0072] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An air conditioner, characterized in that, It includes: The indoor unit is equipped with an air conditioning outlet and a fresh air outlet; An air conditioning fan is installed inside the indoor unit, and the air conditioning fan is used to deliver air conditioning air to the room through the air conditioning outlet; An indoor heat exchanger, which is installed inside the indoor unit, allows heat exchange between the refrigerant flowing inside and the air to form a heating cycle or a cooling cycle, thereby increasing or decreasing the temperature of the air conditioning air output to the room. A fresh air fan is installed inside the indoor unit. The fresh air fan is used to deliver fresh outdoor air to the room through the fresh air outlet, so as to exhaust indoor air to the outside. An indoor temperature sensor is installed inside the indoor unit and is used to detect the indoor temperature; A formaldehyde removal component is installed inside the indoor unit and is used to adsorb formaldehyde in the air conditioning air. The outdoor unit is installed outdoors; An outdoor temperature sensor is installed inside the outdoor unit to detect the outdoor temperature; An air guide plate is installed on the indoor unit and on the side near the air conditioner outlet, and is used to adjust the direction of the air conditioning air passing through the air conditioner outlet. A driving component, the driving component being used to drive the air guide plate to rotate; The controller is configured such that when the air conditioner is running in formaldehyde removal mode, the outdoor temperature sensor detects the outdoor temperature. When the outdoor temperature reaches the first preset outdoor temperature and is below the second preset outdoor temperature, the controller controls the indoor heat exchanger to perform a heating cycle to make the indoor temperature reach the first set temperature, so that formaldehyde is released at the first rate; the air conditioner fan draws in indoor air and, after adsorbing the formaldehyde in the air conditioner air through the formaldehyde removal component, re-exports it into the room. When the outdoor temperature reaches or exceeds the second preset outdoor temperature, the controller controls the indoor heat exchanger to perform a heating cycle to bring the indoor temperature to the second set temperature, so that the formaldehyde in the room is released at a second rate; the fresh air fan runs to exhaust the indoor air containing formaldehyde to the outside; wherein, the first rate is less than the second rate; When the outdoor temperature reaches the first preset outdoor temperature, the drive unit is controlled to drive the air guide plate to rotate back and forth so that the air conditioning air passing through the air conditioning outlet can be swept back and forth, thereby accelerating the indoor air flow and accelerating the formaldehyde release rate.

2. The air conditioner according to claim 1, characterized in that, The indoor unit is equipped with a humidifier, which is used to increase indoor humidity in order to accelerate the release of formaldehyde. When the outdoor temperature reaches the first preset outdoor temperature, the humidifier operates to increase the indoor humidity, thereby increasing the formaldehyde release rate.

3. The air conditioner according to claim 2, characterized in that, The indoor unit is equipped with a humidity detector for detecting indoor humidity. The controller is configured to have a normal dehumidification setting value and a formaldehyde removal dehumidification setting value. The formaldehyde removal dehumidification setting value is greater than the normal dehumidification setting value. When the air conditioner enters the formaldehyde removal mode, the humidity detector detects the indoor humidity. When the indoor humidity is greater than the formaldehyde removal dehumidification setting value, the air conditioner enters the dehumidification mode.

4. The air conditioner according to claim 3, characterized in that, When the outdoor temperature reaches the first preset outdoor temperature, the humidifier operates to bring the indoor humidity to a preset level, which is 90% to 99%.

5. The air conditioner according to claim 3, characterized in that, The controller is configured to set a humidity hysteresis range, and to control the humidifier to stop working when the indoor humidity is within the humidity hysteresis range.

6. The air conditioner according to claim 1, characterized in that, When the air conditioner fan draws in indoor air and adsorbs formaldehyde from the air conditioner air through the formaldehyde removal component before re-exporting it indoors, the higher the indoor temperature, the greater the power of the air conditioner fan.

7. The air conditioner according to claim 1, characterized in that, When the fresh air fan is operating to expel indoor air containing formaldehyde to the outside, the higher the indoor temperature, the greater the power of the fresh air fan.

8. The air conditioner according to claim 1, characterized in that, When the outdoor temperature does not reach the first preset outdoor temperature, the controller controls the air conditioner fan to enter standby mode.

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