Air conditioner

Abstract

The present application relates to an air conditioner, belonging to the technical field of air conditioning, the air conditioner comprises: a shell, a heat exchange fan, an indoor heat exchanger, a humidifier, a fresh air fan, an aldehyde removal module and a controller; the aldehyde removal module is arranged in the shell, and the aldehyde removal module is used for adsorbing formaldehyde; the controller is configured to: enter a first mode, a second mode or a third mode according to a scene; in the first mode, the indoor heat exchanger is controlled to be used as a condenser to make the indoor temperature reach a first preset temperature value; the humidifier is controlled to be turned on to make the indoor humidity reach a first preset humidity value; the fresh air fan is started; in the second mode, the indoor heat exchanger is controlled to be used as a condenser to make the indoor temperature reach a second preset temperature value; the humidifier is controlled to be turned on to make the indoor humidity reach a second preset humidity value; the fresh air fan is started; in the third mode, the aldehyde removal module is turned on.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and more particularly to an air conditioner. Background Technology

[0002] Currently, with the improvement of people's living standards, health has become an increasingly important factor in the home environment. In the home appliance market, more and more appliances are being developed around the theme of "health." Formaldehyde has become the number one killer affecting home health, and more and more users are seeking reliable and effective formaldehyde removal methods. Formaldehyde, a Group 1 carcinogen, is widely present in furniture, wall coverings, flooring, and other home decoration materials. Its release is long-lasting and slow; some well-encapsulated home decoration materials can release formaldehyde for nearly 10 years. Currently, there is no mature technology that can completely remove formaldehyde from home decoration materials in a short period of time.

[0003] An air conditioner, also known as an air conditioning unit, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow within a building or structure. Air conditioners typically consist of an indoor unit and an outdoor unit. Some air conditioners have formaldehyde removal capabilities; however, currently, formaldehyde removal using air conditioners cannot differentiate between actual usage scenarios, and their formaldehyde removal efficiency and energy consumption cannot reach their optimal levels. Summary of the Invention

[0004] This invention at least partially solves one of the technical problems in the related art.

[0005] Therefore, this application aims to provide an air conditioner that implements different formaldehyde removal schemes in the first, second and third modes, distinguishing them according to actual usage scenarios, so as to ensure that the formaldehyde removal effect and energy consumption are optimal.

[0006] To achieve the above objectives, the present invention provides an air conditioner, comprising:

[0007] The housing has a heat exchange outlet and a fresh air outlet.

[0008] A heat exchange fan is disposed inside the housing; the heat exchange fan is used to deliver air conditioning air to the room through the heat exchange outlet;

[0009] An indoor heat exchanger is a device that allows heat exchange between the refrigerant flowing inside and the air to form a heating or cooling cycle.

[0010] A humidifier, disposed within the housing, is used to increase indoor humidity in order to accelerate the volatilization of formaldehyde;

[0011] A fresh air fan is installed inside the housing and is used to deliver outdoor fresh air to the room through the fresh air outlet.

[0012] A formaldehyde removal module is disposed within the housing and is used to adsorb formaldehyde.

[0013] The controller is configured to enter the first mode, the second mode, or the third mode depending on the scenario.

[0014] In the first mode, the indoor heat exchanger is controlled to be used as a condenser to bring the indoor temperature to a first preset value; the humidifier is controlled to be turned on to bring the indoor humidity to a first preset value; and the fresh air fan is started.

[0015] In the second mode, the indoor heat exchanger is controlled to be used as a condenser to bring the indoor temperature to a second preset value; the humidifier is controlled to be turned on to bring the indoor humidity to a second preset value; and the fresh air fan is started.

[0016] In the third mode, activate the formaldehyde removal module.

[0017] The technical solution implements different formaldehyde removal schemes in the first, second and third modes, which are differentiated according to the actual use scenarios to ensure that the formaldehyde removal effect and energy consumption are optimal.

[0018] In some embodiments of this application, the controller is configured to: determine that the property is unoccupied for a long period of time and enter a first mode; determine that the property is unoccupied for a short period of time and enter a second mode; determine that the property is occupied and enter a third mode.

[0019] The first preset temperature value is higher than the second preset temperature value; the first preset humidity value is higher than the second preset humidity value.

[0020] The technical solution categorizes residents into three modes: unoccupied, short-term occupied, and occupied. This approach covers most scenarios, ensuring that the corresponding formaldehyde removal mode can be applied to each of these three scenarios, thereby improving formaldehyde removal efficiency.

[0021] In some embodiments of this application, a formaldehyde detector is further provided inside the housing, which is used to detect the formaldehyde content in the current indoor air to obtain the current formaldehyde content value;

[0022] The controller is configured to: in the first mode, when the indoor temperature reaches a first preset temperature value and the indoor humidity reaches a first preset humidity value, control the formaldehyde detector to detect and obtain the current formaldehyde content value; if the current formaldehyde content value is greater than the first preset formaldehyde content value, then start the fresh air fan.

[0023] In the technical solution, if the current formaldehyde content value is determined to be higher than the first preset formaldehyde content value, it means that the formaldehyde content has reached a saturation state. Simply increasing the temperature and humidification will not have a significant effect. Therefore, the fresh air fan is turned on to pump outdoor fresh air into the room so that the indoor air containing formaldehyde is exhausted to the outside, thus completing the formaldehyde removal.

[0024] In some embodiments of this application, the controller is configured to: in a second mode, start the fresh air fan and simultaneously activate the formaldehyde removal module.

[0025] In the technical solution, in the second mode, while the fresh air fan removes formaldehyde from the indoor air, the formaldehyde removal module further enhances the formaldehyde removal effect, ensuring that the indoor air containing formaldehyde can be quickly removed when the user may return home at any time, thus increasing the speed of formaldehyde removal.

[0026] In some embodiments of this application, the controller is configured to: in a second mode, when the indoor temperature reaches a second preset temperature value and the indoor humidity reaches a second preset humidity value; shut down the indoor heat exchanger and humidifier and start the fresh air fan and module.

[0027] In the technical solution, when the fresh air fan is turned on, the indoor air is exhausted, and the effect on indoor heating and humidification is not significant at this time. Therefore, the indoor heat exchanger and humidifier are turned off.

[0028] In some embodiments of this application, in the second mode, when the indoor temperature reaches a second preset temperature value and the indoor humidity reaches a second preset humidity value, if the user inputs a specific command, the indoor heat exchanger and humidifier are turned off and the fresh air fan is started.

[0029] In the technical solution, if the user inputs a specific command, the current operation is interrupted, and the fresh air fan is turned on to expel the formaldehyde-containing air from the room.

[0030] In some embodiments of this application, the controller is configured to: in a second mode, after the indoor temperature reaches a second preset temperature value and the indoor humidity reaches a second preset humidity value; calculate the time it takes for the current formaldehyde content value to reach the second preset formaldehyde content value and obtain a waiting time; if the waiting time is greater than a second set time, then turn off the indoor heat exchanger and humidifier and start the fresh air fan.

[0031] In the technical solution, if the waiting time exceeds the second preset time, it means that the indoor formaldehyde content will not reach the second preset formaldehyde content value under the current operating conditions within the second preset time. Therefore, the fresh air fan is directly turned on, using outdoor fresh air to expel the formaldehyde-containing indoor air outdoors through air pressure. This ensures that formaldehyde removal is completed within the time specified in the second mode, ensuring that a large amount of formaldehyde-containing indoor air has been expelled when the user returns home, avoiding harm to the user's health.

[0032] In some embodiments of this application, the controller is configured to: after entering the third mode, control the formaldehyde detector to detect and obtain the current formaldehyde content value; if the current formaldehyde content value is greater than the third preset formaldehyde content value, then start the fresh air fan and start the formaldehyde removal module.

[0033] In the technical solution, if the formaldehyde content is too high when people are indoors, exceeding the third preset formaldehyde content value, the formaldehyde in the room needs to be quickly expelled. Therefore, while expelling the formaldehyde-containing air from the room through outdoor fresh air, the formaldehyde module removes the formaldehyde, removing the formaldehyde in the room in the fastest way possible, reducing the time users are in high concentrations of formaldehyde, and protecting the health of users.

[0034] In some embodiments of this application, the controller is configured to: in the third mode, if the current formaldehyde content value is less than the third preset formaldehyde content value, only the fresh air fan is activated.

[0035] In this technical solution, the indoor formaldehyde content is low at this time, and the indoor air containing formaldehyde can be exhausted simply by using outdoor fresh air, thus saving energy and costs.

[0036] In some embodiments of this application, the controller is configured to exit the third mode after the fresh air fan has been running for a preset time in the third mode.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of an air conditioner according to an embodiment of this application;

[0039] Figure 2 This is a schematic diagram of the overall structure of an air conditioner according to an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the overall structure of an air conditioner according to an embodiment of this application;

[0041] Figure 4 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0042] Figure 5 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0043] Figure 6 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0044] Figure 7This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0045] Figure 8 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0046] Figure 9 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0047] Figure 10 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0048] Figure 11 This is a flowchart illustrating the operation of an air conditioner according to an embodiment of this application;

[0049] Figure 12 This is a flowchart of the operation of an air conditioner according to an embodiment of this application.

[0050] In the above diagrams: 100, casing; 200, outdoor unit. Detailed Implementation

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0056] 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 or outdoor heat exchanger can function as either a condenser or a refrigerant. 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 a refrigerant, it acts as a cooler in cooling mode.

[0057] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0058] As attached Figures 1 to 4 As shown, in an illustrative embodiment of the air conditioner of the present invention, the air conditioner includes: a housing 100, a heat exchange fan, an indoor heat exchanger, a humidifier, a fresh air fan, a formaldehyde removal module, and a controller. The housing 100 has a heat exchange outlet and a fresh air outlet. The heat exchange fan is disposed inside the housing 100 and is used to deliver air conditioning air to the room through the heat exchange outlet. The refrigerant flowing inside the indoor heat exchanger exchanges heat with the air to form a heating cycle or a cooling cycle. The humidifier is disposed inside the housing 100 and is used to increase indoor humidity to accelerate the volatilization of formaldehyde. The fresh air fan is disposed inside the housing 100 and is used to deliver outdoor fresh air to the room through the fresh air outlet. The formaldehyde removal module is disposed inside the housing 100 and is used to adsorb formaldehyde. The controller is configured to enter a first mode, a second mode, or a third mode according to the scenario.

[0059] In the first mode, the indoor heat exchanger is controlled to be used as a condenser to bring the indoor temperature to a first preset value; the humidifier is controlled to be turned on to bring the indoor humidity to a first preset value; and the fresh air fan is started.

[0060] In the second mode, the indoor heat exchanger is controlled to be used as a condenser to bring the indoor temperature to the second preset value; the humidifier is controlled to be turned on to bring the indoor humidity to the second preset value; and the fresh air fan is started.

[0061] In the third mode, activate the formaldehyde removal module.

[0062] The above approach implements different formaldehyde removal schemes in the first, second, and third modes, tailored to different usage scenarios, to ensure optimal formaldehyde removal effect and energy consumption.

[0063] In some embodiments, the controller is configured to: enter a first mode if it is determined that the residence is unoccupied for a long period; enter a second mode if it is determined that the residence is unoccupied for a short period; and enter a third mode if it is determined that the residence is occupied; a first preset temperature value is higher than a second preset temperature value; and a first preset humidity value is higher than a second preset humidity value. This application distinguishes between the first, second, and third modes based on whether the residence is unoccupied, temporarily occupied, or occupied. This approach covers most scenarios, ensuring that the corresponding formaldehyde removal mode can be applied to the above three scenarios, thereby improving formaldehyde removal efficiency.

[0064] In reality, situations where a house is unoccupied for an extended period usually occur during or after new home renovations, when formaldehyde levels are typically at their highest. Because the house is unoccupied for a long time, humidity and temperature don't need to be controlled. Higher temperatures and humidity levels accelerate formaldehyde release. Setting the first preset temperature and humidity levels higher than the second preset temperature and humidity levels allows formaldehyde to be released quickly from furniture and into the indoor air. An outdoor ventilation fan then draws in outdoor air, and the formaldehyde-containing air is forced out by air pressure, completing the formaldehyde removal process.

[0065] The second mode is typically used when the user has already moved in but is temporarily away from home. The formaldehyde content is also lower in this mode compared to the first mode. Therefore, a second preset temperature and humidity value, lower than the first mode, are used.

[0066] In the third mode, since there are already users indoors, raising the temperature and humidifying the room would negatively impact their experience. Therefore, using a formaldehyde removal module to remove formaldehyde will not affect the indoor temperature and humidity.

[0067] In some embodiments, the difference between long-term vacancy and short-term vacancy lies in whether the duration or number of days of vacancy exceeds a set value, which can be set by the user, distributed from the cloud, or preset at the factory when the air conditioner leaves the factory.

[0068] In some embodiments, users can choose to enter the first mode, the second mode, and the third mode as needed.

[0069] In some embodiments, the formaldehyde removal module includes an adsorption material, including but not limited to activated carbon. The activated carbon adsorbs formaldehyde from the room, reducing the formaldehyde content in the indoor air.

[0070] In some embodiments, the formaldehyde module includes chemical agents, such as those obtained through a chemical reaction using potassium permanganate. Alternatively, it may utilize consumable modules such as those employing catalytic oxidation technology. These specific forms are existing technologies and will not be elaborated upon here.

[0071] In some embodiments, a formaldehyde detector is also provided inside the housing 100. The formaldehyde detector is used to detect the formaldehyde content in the current indoor air to obtain the current formaldehyde content value.

[0072] Please refer to Figures 5 to 7 The controller is configured to: in the first mode, when the indoor temperature reaches the first preset temperature value and the indoor humidity reaches the first preset humidity value, control the formaldehyde detector to detect and obtain the current formaldehyde content value; if the current formaldehyde content value is greater than the first preset formaldehyde content value, then start the fresh air fan.

[0073] In some embodiments, the first preset formaldehyde content value is determined by experiments. If it is determined that the current formaldehyde content value is higher than the first preset formaldehyde content value, it means that the formaldehyde content has reached a saturation state. The effect of simply heating and humidifying is not significant. Therefore, the fresh air fan is turned on to pump outdoor fresh air into the room so that the indoor air containing formaldehyde is exhausted to the outside, thus completing the formaldehyde removal.

[0074] In some embodiments, the first preset formaldehyde content value is the national safety standard value for formaldehyde. If the formaldehyde content value is exceeded, it will pose a hazard to indoor users, so a fresh air system is activated to remove the formaldehyde from the room.

[0075] In some embodiments, the housing 100 is provided with an indoor temperature sensor for detecting the indoor temperature to obtain an indoor temperature value. A humidity sensor is also provided inside the housing 100 for detecting the indoor humidity to obtain an indoor humidity value. The fresh air fan has a first fresh air speed and a second fresh air speed, wherein the first fresh air speed is greater than the second fresh air speed.

[0076] Please refer to Figures 5 to 7The controller is configured as follows: Upon entering the first mode, it controls the indoor temperature sensor and humidity sensor to acquire indoor temperature and humidity values, respectively. It then determines whether the indoor temperature value is greater than a first preset temperature value. If yes, it maintains the current state; otherwise, it controls the indoor heat exchanger to be used as a condenser. Next, it determines whether the indoor humidity value is greater than a first preset humidity value. If yes, it maintains the current state; otherwise, it activates the humidifier. Finally, it controls the formaldehyde detector to acquire the current formaldehyde content value and determines whether it is greater than a first preset formaldehyde content value. If no, it maintains the current state; if yes, it activates the fresh air fan and controls it to operate at the first fresh air speed. After the fresh air fan starts, it determines whether the current formaldehyde content value is greater than the first preset formaldehyde content value. If yes, it maintains the current state; otherwise, it exits the first mode.

[0077] In some embodiments, when determining the relationship between the current formaldehyde content value and the first preset formaldehyde content value, a buffer difference is added to or subtracted from the first preset formaldehyde content value before calculation. This is to prevent the fresh air fan from repeatedly starting and stopping when the current formaldehyde content value is close to the first preset formaldehyde content value.

[0078] In some embodiments, the controller is configured to shut down the indoor heat exchanger and humidifier when the fresh air fan is turned on in a first mode. When the fresh air fan is activated, indoor air is exhausted, which has little effect on indoor heating and humidification; therefore, shutting down the indoor heat exchanger and humidifier saves costs.

[0079] Please refer to Figures 8 to 11 In some embodiments, the controller is configured to activate the formaldehyde removal module simultaneously with the fresh air fan in the second mode. In the second mode, while the fresh air fan removes formaldehyde-laden air from the room, the formaldehyde removal module further enhances the formaldehyde removal effect, ensuring rapid removal of formaldehyde-containing air from the room, even when the user may return home at any time, thus increasing the speed of formaldehyde removal.

[0080] In some embodiments, the controller is configured to: in the second mode, when the indoor temperature reaches a second preset temperature value and the indoor humidity reaches a second preset humidity value; shut down the indoor heat exchanger and humidifier and start the fresh air fan and module. When the fresh air fan is started, indoor air is exhausted, and the effect on indoor heating and humidification is not significant at this time. Therefore, shutting down the indoor heat exchanger and humidifier saves costs.

[0081] Please refer to Figures 8 to 11 In some embodiments, the controller is configured such that after entering the second mode, the user sets a first preset time. In this solution, the first preset time is the time the user needs to be away from home, and the user needs to exit the second mode after the first preset time has elapsed. During the second mode process, the remaining time until the first preset time is reached is the second preset time.

[0082] In some embodiments, in the second mode, when the indoor temperature reaches a second preset temperature value and the indoor humidity reaches a second preset humidity value, if the user inputs a specific command, the indoor heat exchanger and humidifier are turned off and the fresh air fan is turned on.

[0083] In the technical solution, if the user inputs a specific command, the current operation is interrupted, and the fresh air fan is turned on directly to expel the formaldehyde-containing air from the room, and the fresh air fan is controlled to run at the first fresh air speed.

[0084] In some embodiments, the specific instruction is an instruction for the user to suddenly return home. That is, in cases where the user needs to exit the second mode before the first preset time has elapsed.

[0085] Please refer to Figures 8 to 11 In some embodiments, the controller is configured to: in the second mode, after the indoor temperature and humidity reach a second preset temperature value and a second preset humidity value, calculate the time it takes for the current formaldehyde content to reach the second preset formaldehyde content value and obtain a waiting time. If the waiting time is greater than the second preset time, then the indoor heat exchanger and humidifier are turned off and the fresh air fan is turned on. If the waiting time is greater than the second preset time, it means that the indoor formaldehyde content under the current operating state does not reach the second preset formaldehyde content value within the second preset time. Therefore, the fresh air fan is directly turned on, and outdoor fresh air is used to exhaust the formaldehyde-containing air from the room to the outside through air pressure. This ensures that formaldehyde removal is completed within the time specified in the second mode, ensuring that a large amount of formaldehyde-containing air has been expelled from the room when the user returns home, avoiding harm to the user's health.

[0086] In some embodiments, the second preset formaldehyde content value is lower than the first preset formaldehyde content value. This is because the second mode is a scenario where users frequently reside, so the standard for the second preset formaldehyde content value is lowered to reduce the formaldehyde content in the air as much as possible, thereby reducing the harm of formaldehyde to the human body.

[0087] Please refer to Figures 8 to 11 In some embodiments, the controller is configured to: upon entering the second mode, the user sets a first preset time and calculates a second preset time in real time, controlling the indoor temperature sensor and humidity sensor to acquire indoor temperature and humidity values ​​respectively. It then determines whether the indoor temperature value is greater than a second preset temperature value; if so, it maintains the current state; otherwise, it controls the indoor heat exchanger to be used as a condenser. It also determines whether the indoor humidity value is greater than a second preset humidity value; if so, it maintains the current state; otherwise, it starts the humidifier. Finally, it calculates the waiting time for the current formaldehyde content to reach the second preset formaldehyde content value.

[0088] Determine whether the waiting time is greater than or equal to the second set time. If so, turn off the indoor heat exchanger and humidifier, turn on the fresh air fan, and control the fresh air fan to run at the second fresh air speed until the preset time is reached. If not, turn off the indoor heat exchanger and humidifier, turn on the fresh air fan, and control the fresh air fan to run at the first fresh air speed.

[0089] After the first set time is reached, the formaldehyde detector is controlled to obtain the current formaldehyde content value and determine whether the formaldehyde content value is greater than the first preset formaldehyde content value. If not, the second mode is exited; if so, the third mode is entered.

[0090] Please refer to Figure 12 In some embodiments, the controller is configured to: upon entering the third mode, control the formaldehyde detector to detect and acquire the current formaldehyde content value; if the current formaldehyde content value is greater than a third preset formaldehyde content value, then start the fresh air fan and activate the formaldehyde removal module. The fresh air fan operates at a second fresh air speed. When people are present indoors, if the formaldehyde content is too high, exceeding the third preset formaldehyde content value, the indoor formaldehyde needs to be quickly expelled. Therefore, while expelling formaldehyde-containing air from the room through outdoor fresh air, the formaldehyde module removes formaldehyde, eliminating indoor formaldehyde in the fastest possible way, reducing the user's exposure to high concentrations of formaldehyde, and protecting the user's health.

[0091] Please refer to Figure 12 In some embodiments, the controller is configured to, in the third mode, if the current formaldehyde content is less than a third preset formaldehyde content value, only activate the fresh air fan, which operates at the second fresh air speed. At this time, the indoor formaldehyde content is low, and only outdoor fresh air is needed to exhaust the formaldehyde-containing air from the room, saving energy and costs.

[0092] In some embodiments, the controller is configured to: in the third mode, after the fresh air fan has run for a preset time, exit the third mode; if the preset time has not been reached, re-evaluate the relationship between the current formaldehyde content value and the third preset formaldehyde content value, and perform the corresponding loop.

[0093] In some embodiments, the third preset formaldehyde content value is lower than the first preset formaldehyde content value.

[0094] In some embodiments, the preset time is set by the user, or is preset by the air conditioner at the factory, or is sent from the cloud.

[0095] In some embodiments, the first preset temperature value is the maximum temperature that the air conditioner can raise, and the first preset humidity value is the maximum humidity value that the humidifier can humidify.

[0096] In some embodiments, the air conditioner further includes an outdoor unit 200, an outdoor heat exchanger is provided inside the outdoor unit 200, and refrigerant flows between the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange.

[0097] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An air conditioner, characterized in that, It includes: The housing has a heat exchange outlet and a fresh air outlet. A heat exchange fan is disposed inside the housing and is used to deliver air conditioning air to the room through the heat exchange outlet. An indoor heat exchanger is a device that allows heat exchange between the refrigerant flowing inside and the air to form a heating or cooling cycle. A humidifier, disposed within the housing, is used to increase indoor humidity in order to accelerate the volatilization of formaldehyde; A fresh air fan is installed inside the housing and is used to deliver outdoor fresh air to the room through the fresh air outlet. A formaldehyde removal module is disposed within the housing and is used to remove formaldehyde. The controller is configured to enter the first mode, the second mode, or the third mode depending on the scenario. In the first mode, the indoor heat exchanger is controlled to be used as a condenser to bring the indoor temperature to a first preset value. Turn on the humidifier to bring the indoor humidity to the first preset value; Start the fresh air fan; In the second mode, the indoor heat exchanger is controlled to be used as a condenser to bring the indoor temperature to a second preset value; the humidifier is controlled to be turned on to bring the indoor humidity to a second preset value; and the fresh air fan is started. In the third mode, the formaldehyde removal module is activated; Among them, if the property is determined to be uninhabited for a long period of time, it enters the first mode; if it is determined to be uninhabited for a short period of time, it enters the second mode; if it is determined to be inhabited, it enters the third mode. The first preset temperature value is higher than the second preset temperature value; the first preset humidity value is higher than the second preset humidity value; In the second mode, the fresh air fan is started and the formaldehyde removal module is activated at the same time; when the indoor temperature and indoor humidity reach the second preset temperature value and the indoor humidity reach the second preset humidity value, the indoor heat exchanger and humidifier are turned off and the fresh air fan and formaldehyde removal module are started. If the user enters a specific command, the indoor heat exchanger and humidifier will be turned off and the fresh air fan will be turned on; the specific command is the command given when the user suddenly returns home.

2. The air conditioner according to claim 1, characterized in that, The housing is also equipped with a formaldehyde detector, which is used to detect the formaldehyde content in the current indoor air to obtain the current formaldehyde content value. The controller is configured to: in the first mode, when the indoor temperature reaches a first preset temperature value and the indoor humidity reaches a first preset humidity value, control the formaldehyde detector to detect and obtain the current formaldehyde content value; if the current formaldehyde content value is greater than the first preset formaldehyde content value, then start the fresh air fan.

3. The air conditioner according to claim 1, characterized in that, The controller is configured to: in the second mode, when the indoor temperature reaches the second preset temperature value and the indoor humidity reaches the second preset humidity value; calculate the time it takes for the current formaldehyde content value to reach the second preset formaldehyde content value and obtain the waiting time; if the waiting time is greater than the second set time, then turn off the indoor heat exchanger and humidifier and start the fresh air fan.

4. The air conditioner according to claim 2, characterized in that, The controller is configured to: after entering the third mode, control the formaldehyde detector to detect and obtain the current formaldehyde content value; if the current formaldehyde content value is greater than the third preset formaldehyde content value, start the fresh air fan and start the formaldehyde removal module.

5. The air conditioner according to claim 4, characterized in that, The controller is configured to, in the third mode, activate only the fresh air fan if the current formaldehyde content is less than the third preset formaldehyde content value.

6. The air conditioner according to claim 5, characterized in that, The controller is configured to exit the third mode after the fresh air fan has been running for a preset time in the third mode.

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