Air conditioner indoor unit

Abstract

The application discloses an air conditioner indoor unit, which comprises a shell, a steam generation module, a fresh air fan, an indoor air fan, a first sensor and a controller. The shell is provided with an indoor air inlet, a fresh air inlet, an air outlet and an air duct. The gas in the air duct is formed into purified gas by steam generated by the steam generation module, and then discharged from the air outlet. The fresh air fan guides outdoor air from the fresh air inlet to the air duct. The indoor air fan guides indoor air from the indoor air inlet to the air duct. The first sensor detects the outlet air temperature of the air conditioner indoor unit. When a steam washing air function opening signal is acquired, the controller controls the steam generation module to generate steam, acquires a target temperature and the outlet air temperature detected by the first sensor, and adjusts the power of the steam generation module, the rotating speed of the fresh air fan and the rotating speed of the indoor air fan according to the difference between the outlet air temperature and the target temperature. The air conditioner indoor unit can humidify, purify and disinfect and kill bacteria of air, and can quickly adjust the outlet air temperature to be close to the target temperature, so that the outlet air is comfortable.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an indoor unit of an air conditioner. Background Technology

[0002] In related technologies, indoor air conditioner units can typically sterilize and humidify indoor air at high temperatures to improve the comfort of the indoor air environment. However, due to the influence of the temperature of the outdoor fresh air, the temperature of the outlet airflow may be too high or too low. Furthermore, when sterilizing the outlet airflow at high temperatures, the temperature of the outlet airflow may rise, resulting in a certain difference between the outlet air temperature and the target temperature. This leads to poor airflow comfort and a poor user experience. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide an indoor unit for an air conditioner that can humidify, purify, and sterilize the air, and can quickly adjust the outlet air temperature to be close to the target temperature, providing comfortable airflow.

[0004] To achieve the above objectives, an indoor unit of an air conditioner is provided according to an embodiment of the present invention, comprising: a housing, having an indoor air inlet, a fresh air inlet, an air outlet, and an air duct, wherein the air duct is connected to the indoor air inlet, the fresh air inlet, and the air outlet respectively; a steam generating module, installed inside the housing, for generating steam, wherein gas in the air duct passes through the steam generated by the steam generating module to form purified gas, and the purified gas is discharged from the air outlet; a fresh air fan, installed inside the air duct, for guiding outdoor air from the fresh air inlet to the air duct; and an indoor fan, installed inside the air duct, for guiding indoor air from the fresh air inlet to the air duct. The indoor air inlet is guided to the air duct; a first sensor, installed in the housing, is used to detect the outlet air temperature of the indoor unit of the air conditioner; a controller, installed inside the housing, is connected to the steam generating module, the fresh air fan, the indoor fan, and the first sensor respectively; the controller is configured to, when receiving a signal to activate the steam air washing function, control the steam generating module to generate steam, obtain the target temperature and the outlet air temperature detected by the first sensor, and adjust the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature.

[0005] According to embodiments of the present invention, the indoor unit of the air conditioner can humidify, purify and sterilize the air, and can quickly adjust the outlet air temperature to be close to the target temperature, providing comfortable airflow.

[0006] According to some embodiments of the present invention, adjusting the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan based on the difference between the outlet air temperature and the target temperature includes: when the indoor unit of the air conditioner is in cooling mode, the controller adjusts the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature using a first method; when the indoor unit of the air conditioner is in heating mode, the controller adjusts the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature using a second method; and when the indoor unit of the air conditioner is in air supply mode, the controller adjusts the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature using a third method.

[0007] According to some embodiments of the present invention, when the indoor unit of the air conditioner is in cooling mode, it has a first temperature fluctuation value T1 and a second temperature fluctuation value T2, wherein T1 < 0 and T2 > 0; the first method includes: if the difference between the outlet air temperature and the target temperature is less than the first temperature fluctuation value T1, then the steam generating module operates at a first power, the fresh air fan operates at a first speed, and the indoor fan operates at a second speed; if the difference between the outlet air temperature and the target temperature is not less than the first temperature fluctuation value T1, then the steam generating module operates at a second power, the fresh air fan operates at a third speed, and the indoor fan operates at a fourth speed; wherein the first power is greater than the second power, the first speed is greater than the third speed, and the second speed is greater than the fourth speed.

[0008] According to some embodiments of the present invention, when the indoor unit of the air conditioner is in heating mode, it has a third temperature fluctuation value T3 and a fourth temperature fluctuation value T4, wherein T3 < 0 and T4 > 0; the second method includes: if the difference between the outlet air temperature and the target temperature is less than the third temperature fluctuation value T3, then the steam generating module operates at a first power, the fresh air fan operates at a third speed, and the indoor fan operates at a second speed; if the difference between the outlet air temperature and the target temperature is not less than the third temperature fluctuation value T3 and not greater than the fourth temperature fluctuation value T4, then the steam generating module operates at a second power, the fresh air fan operates at a third speed, and the indoor fan operates at a fourth speed; if the difference between the outlet air temperature and the target temperature is greater than the fourth temperature fluctuation value T4, then the steam generating module operates at a second power, the fresh air fan operates at a first speed, and the indoor fan operates at a fourth speed; wherein the first power is greater than the second power, the first speed is greater than the third speed, and the second speed is greater than the fourth speed.

[0009] According to some embodiments of the present invention, when the indoor unit of the air conditioner is in the air supply mode, it has a fifth temperature fluctuation value T5 and a sixth temperature fluctuation value T6, wherein T5 < 0 and T6 > 0; the third method includes: if the difference between the outlet air temperature and the target temperature is less than the fifth temperature fluctuation value T5, then the steam generating module operates at a first power, the fresh air fan operates at a third speed, and the indoor fan operates at a second speed; if the difference between the outlet air temperature and the target temperature is not less than the fifth temperature fluctuation value T5, then the steam generating module operates at a second power, the fresh air fan operates at a third speed, and the indoor fan operates at a fourth speed; wherein the first power is greater than the second power, the first speed is greater than the third speed, and the second speed is greater than the fourth speed.

[0010] According to some embodiments of the present invention, the indoor unit of the air conditioner further includes: a second sensor, installed in the housing and connected to the controller, for detecting indoor temperature; wherein the controller is configured to, when the indoor unit of the air conditioner is in air supply mode, acquire the indoor temperature detected by the second sensor, and adjust the target temperature to the indoor temperature detected by the second sensor.

[0011] According to some embodiments of the present invention, the indoor unit of the air conditioner further includes: a second sensor, installed in the housing and connected to the controller, for detecting indoor temperature; and a third sensor, connected to the controller, for detecting outdoor temperature; wherein the controller is configured to, when receiving a signal to activate the steam air washing function, acquire the indoor temperature detected by the second sensor and the outdoor temperature detected by the third sensor, determine whether the absolute value of the difference between the indoor temperature and the outdoor temperature is not greater than a preset value, and if so, open the fresh air inlet; otherwise, open the indoor air inlet and close the fresh air inlet.

[0012] According to some embodiments of the present invention, the preset value is multiple and is one of a cooling preset value, a heating preset value, and a ventilation preset value; wherein, when the indoor unit of the air conditioner is in cooling mode, the preset value is equal to the cooling preset value; when the indoor unit of the air conditioner is in heating mode, the preset value is equal to the heating preset value; when the indoor unit of the air conditioner is in ventilation mode, the preset value is equal to the ventilation preset value; wherein, the cooling preset value, the heating preset value, and the ventilation preset value are all different.

[0013] According to some embodiments of the present invention, after obtaining the steam air washing function signal, before adjusting the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan; the steam generating module operates at the lowest power, the fresh air fan operates at the lowest speed, and the indoor fan operates at the lowest speed.

[0014] According to some embodiments of the present invention, the steam generating module includes: a base mounted on the housing; a water tank mounted on the base; a heating element mounted on the base and extending into the water tank; and a filter screen mounted on the water tank for covering the opening of the water tank.

[0015] According to some embodiments of the present invention, the indoor unit of the air conditioner further includes: a baffle plate, which is rotatably mounted on the housing between a first position, a second position, and a third position. When the baffle plate is in the first position, it blocks the fresh air inlet and exposes the indoor air inlet. When the baffle plate is in the second position, it blocks the indoor air inlet and exposes the fresh air inlet. When the baffle plate is in the third position, it exposes both the indoor air inlet and the fresh air inlet. The baffle plate is in the first position when the indoor unit of the air conditioner is turned off.

[0016] 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

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a flowchart of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0019] Figure 2 This is a flowchart illustrating the indoor unit of an air conditioner in cooling mode according to an embodiment of the present invention.

[0020] Figure 3 This is a flowchart illustrating the indoor unit of an air conditioner in heating mode according to an embodiment of the present invention.

[0021] Figure 4 This is a flowchart illustrating the indoor unit of an air conditioner in air supply mode according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0023] Figure 6This is another structural schematic diagram of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0024] Figure 7 This is a structural schematic diagram of the indoor unit of an air conditioner according to an embodiment of the present invention from another perspective.

[0025] Figure 8 This is an exploded view of the indoor unit of an air conditioner according to an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of the water tank of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure of the baffle of the indoor unit of an air conditioner in the first position according to an embodiment of the present invention.

[0028] Figure 11 This is a schematic diagram of the structure of the baffle of the indoor unit of an air conditioner in the second position according to an embodiment of the present invention.

[0029] Figure 12 This is a schematic diagram of the structure of the baffle of the indoor unit of an air conditioner in the third position according to an embodiment of the present invention.

[0030] Figure label:

[0031] Air conditioner indoor unit 1

[0032] Housing 100, Indoor air inlet 110, Fresh air inlet 120, Air outlet 130, Air duct 140

[0033] Steam generating module 200, base 210, water tank 220, opening 221, outlet 222, heating element 230, filter screen 240.

[0034] Fresh air fan 300, baffle 400. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] 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," "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.

[0037] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0038] In the description of this invention, "a plurality of" means two or more, and "several" means one or more.

[0039] The indoor unit 1 of an air conditioner according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0040] like Figures 1-12 As shown, the indoor unit 1 of the air conditioner according to an embodiment of the present invention includes a housing 100, a steam generating module 200, a fresh air fan 300, an indoor fan, a first sensor, and a controller.

[0041] The housing 100 is provided with an indoor air inlet 110, a fresh air inlet 120, an air outlet 130, and an air duct 140. The air duct 140 is connected to the indoor air inlet 110, the fresh air inlet 120, and the air outlet 130, respectively. A steam generating module 200 is installed inside the housing 100 to generate steam. The gas in the air duct 140 is purified by the steam generated by the steam generating module 200 and is discharged from the air outlet 130. A fresh air fan 300 is installed inside the air duct 140 to guide outdoor air from the fresh air inlet 120 to the air duct 140. An indoor fan is installed inside the air duct 140 to circulate indoor air. The air is guided from the indoor air inlet 110 to the air duct 140. The first sensor is installed in the housing 100 to detect the outlet air temperature of the indoor unit 1 of the air conditioner. The controller is installed inside the housing 100 and is connected to the steam generating module 200, the fresh air fan 300, the indoor fan and the first sensor respectively. The controller is configured to control the steam generating module 200 to generate steam when it receives the signal to activate the steam air washing function, obtain the target temperature and the outlet air temperature detected by the first sensor, and adjust the power of the steam generating module 200, the speed of the fresh air fan 300 and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature.

[0042] In this embodiment of the invention, the indoor unit 1 of the air conditioner can be a wall-mounted air conditioner indoor unit 1 or a floor-standing air conditioner indoor unit 1. The outlet air temperature can be the airflow temperature at the outlet 130.

[0043] According to an embodiment of the present invention, the indoor unit 1 of the air conditioner is provided with an indoor air inlet 110, a fresh air inlet 120, an air outlet 130, and an air duct 140 in the housing 100. The air duct 140 is connected to the indoor air inlet 110, the fresh air inlet 120, and the air outlet 130 respectively. A steam generating module 200 is installed in the housing 100 to generate steam. The gas in the air duct 140 is purified by the steam generated by the steam generating module 200 and discharged from the air outlet 130. A fresh air fan 300 is installed in the air duct 140 to guide outdoor air from the fresh air inlet 120 to the air duct 140. An indoor fan is installed in the air duct 140 to guide indoor air from the indoor air inlet 110 to the air duct 140.

[0044] In this way, the indoor unit 1 of the air conditioner can guide outdoor fresh air into the casing 100 through the fresh air inlet 120 via the fresh air fan 300, and guide indoor air into the casing 100 through the indoor air inlet via the indoor fan. The steam generated by the steam generating module 200 can form a high-temperature steam barrier. After the outdoor fresh air and indoor air pass through the high-temperature steam barrier generated by the steam generating module 200, they flow into the room through the air outlet 130. The high-temperature steam of the steam generating module 200 can sterilize the airflow at high temperature, and the airflow can carry the steam generated by the steam generating module 200 into the room to humidify the indoor air, which is beneficial to increase the humidity of the indoor air and prevent the indoor air from being too dry, making the user more comfortable. Moreover, when the outdoor fresh air and indoor air flowing into the casing 100 pass through the high-temperature steam barrier of the steam generating module 200, the dust and impurities mix with the steam and fall down, which can remove dust from the airflow.

[0045] Additionally, a first sensor is installed in the housing 100 to detect the outlet air temperature of the indoor unit 1 of the air conditioner. The controller is installed inside the housing 100 and is connected to the steam generating module 200, the fresh air fan 300, the indoor fan, and the first sensor. In this way, the first sensor can detect the outlet air temperature of the indoor unit 1 of the air conditioner and feed the outlet air temperature back to the controller.

[0046] Specifically, the controller is configured to, upon receiving a signal indicating that the steam air washing function is activated, control the steam generating module 200 to generate steam, acquire the target temperature and the outlet air temperature detected by the first sensor, and adjust the power of the steam generating module 200, the speed of the fresh air fan 300, and the speed of the indoor fan based on the difference between the outlet air temperature and the target temperature.

[0047] Thus, when there is a difference between the outlet air temperature detected by the first sensor and the target temperature, for example, when the first sensor detects that the outlet air temperature is lower than the target temperature, the controller can increase the power of the steam generating module 200 to increase the steam quantity or steam temperature of the steam generating module 200, thereby increasing the temperature of the outlet airflow passing through the high-temperature steam barrier, so that the outlet air temperature is closer to the target temperature; or, when the first sensor detects that the outlet air temperature is higher than the target temperature, the controller can decrease the power of the steam generating module 200 to decrease the steam quantity or steam temperature of the steam generating module 200, thereby decreasing the temperature of the outlet airflow passing through the high-temperature steam barrier, so that the outlet air temperature is closer to the target temperature, and the airflow is more comfortable.

[0048] In addition, when the outdoor temperature is higher than the indoor temperature, the speed of the fresh air fan 300 can be increased to increase the volume of fresh outdoor air entering the room, thereby increasing the outlet temperature of the indoor unit 1 of the air conditioner through the heat of the fresh outdoor air; when the outdoor temperature is lower than the indoor temperature, the speed of the fresh air fan 300 can be increased to increase the volume of fresh outdoor air entering the room, thereby reducing the outlet temperature of the indoor unit 1 of the air conditioner by introducing the cooler fresh outdoor air, so as to adjust the outlet temperature to be closer to the target temperature and make the airflow more comfortable.

[0049] In addition, the outlet air temperature can also be adjusted by regulating the speed of the indoor fan. Specifically, when the outlet air temperature is lower than the target temperature, the speed of the indoor fan can be increased. In this way, the indoor fan can guide the air conditioning air through the high-temperature steam barrier and blow it quickly into the room to bring the heat of the high-temperature steam into the room, thereby increasing the temperature of the outlet airflow and making the outlet air temperature closer to the target temperature. When the outlet air temperature is higher than the target temperature, the speed of the indoor fan can be reduced. In this way, the airflow speed after passing through the high-temperature steam barrier can be reduced. The airflow passing through the high-temperature steam barrier can be cooled in the air duct 140 before being discharged into the room, thereby reducing the temperature of the outlet airflow and making the outlet air temperature closer to the target temperature.

[0050] Therefore, the indoor unit 1 of the air conditioner can not only humidify, purify and sterilize the air through the steam generating module 200, but also quickly adjust the outlet air temperature to be close to the target temperature by adjusting the power of the steam generating module 200, the speed of the fresh air fan 300 and the speed of the indoor fan, so as to make the outlet air of the indoor unit 1 more comfortable and the user experience better.

[0051] Thus, according to the embodiment of the present invention, the indoor unit 1 of the air conditioner can humidify, purify and sterilize the air, and can quickly adjust the outlet air temperature to be close to the target temperature, so that the air outlet is comfortable.

[0052] In some specific embodiments of the present invention, such as Figures 2-4 As shown, based on the difference between the outlet air temperature and the target temperature, the power of the steam generating module 200, the speed of the fresh air fan 300, and the speed of the indoor fan are adjusted, including:

[0053] When the indoor unit 1 of the air conditioner is in cooling mode, the controller adjusts the power of the steam generation module 200, the speed of the fresh air fan 300 and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature using a first method.

[0054] When the indoor unit 1 of the air conditioner is in heating mode, the controller adjusts the power of the steam generation module 200, the speed of the fresh air fan 300 and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature using a second method.

[0055] When the indoor unit 1 of the air conditioner is in the air supply mode, the controller adjusts the power of the steam generation module 200, the speed of the fresh air fan 300 and the speed of the indoor fan according to the difference between the outlet air temperature and the target temperature using a third method.

[0056] It is understandable that when the indoor unit 1 of the air conditioner is in cooling mode, the outdoor temperature is usually higher than the indoor temperature; when the indoor unit 1 of the air conditioner is in heating mode, the outdoor temperature is usually lower than the indoor temperature; and when the indoor unit 1 of the air conditioner is in ventilation mode, the outdoor temperature is usually close to the indoor temperature.

[0057] Therefore, when the indoor unit 1 of the air conditioner is in cooling mode, heating mode, and air supply mode, the indoor unit 1 of the air conditioner will adjust the power of the steam generating module 200, the speed of the fresh air fan 300, and the speed of the indoor fan using the first method, the second method, and the third method, respectively. In this way, the power of the steam generating module 200, the speed of the fresh air fan 300, and the speed of the indoor fan can be adjusted in different modes to ensure that the outlet air temperature can quickly approach the target temperature in different modes.

[0058] In some specific embodiments of the present invention, such as Figures 2-4 As shown, after obtaining the steam air washing function signal, before adjusting the power of the steam generator module 200, the speed of the fresh air fan 300, and the speed of the indoor fan;

[0059] The steam generator module 200 operates at the lowest power, the fresh air fan 300 operates at the lowest speed, and the indoor fan operates at the lowest speed.

[0060] For example, the steam generating module 200 can operate at a lower second power level, the fresh air fan 300 can operate at a lower second speed, and the indoor fan can operate at a lower fourth speed. In this way, the steam generating module 200, the fresh air fan 300, and the indoor fan can operate at the lowest power consumption after the indoor unit 1 of the air conditioner is turned on, ensuring that the steam generating module 200, the fresh air fan 300, and the indoor fan can function normally, and facilitating subsequent dynamic parameter adjustment of the steam generating module 200, the fresh air fan 300, and the indoor fan.

[0061] In some specific embodiments of the present invention, such as Figure 2 As shown, when the indoor unit 1 of the air conditioner is in cooling mode, it has a first temperature fluctuation value T1 and a second temperature fluctuation value T2, where T1 < 0 and T2 > 0.

[0062] The first method includes: if the difference between the outlet air temperature and the target temperature is less than the first temperature fluctuation value T1, then the steam generating module 200 operates at the first power, the fresh air fan 300 operates at the first speed, and the indoor fan operates at the second speed; if the difference between the outlet air temperature and the target temperature is not less than the first temperature fluctuation value T1, then the steam generating module 200 operates at the second power, the fresh air fan 300 operates at the third speed, and the indoor fan operates at the fourth speed.

[0063] Wherein, the first power is greater than the second power, the first rotational speed is greater than the third rotational speed, and the second rotational speed is greater than the fourth rotational speed. The absolute value of the first temperature fluctuation value T1 can be equal to the absolute value of the second temperature fluctuation value T2.

[0064] Understandably, in cooling mode, when the outdoor temperature is higher than the indoor temperature, if the difference between the outlet air temperature and the target temperature is less than the first temperature fluctuation value T1, it means the difference between the outlet air temperature and the target temperature is less than 0. At this time, the outlet air temperature is lower than the target temperature, and the cooling capacity of the indoor unit 1 of the air conditioner is too large. Therefore, it is necessary to increase the outlet air temperature to make it closer to the target temperature. Thus, by operating the steam generating module 200 at a higher first power, the temperature of the airflow passing through the high-temperature steam barrier can be increased to improve the outlet air temperature. Additionally, by operating the fresh air fan 300 at a higher first speed, the fresh air fan 300 can increase the airflow of outdoor air entering the room, thereby utilizing the higher temperature outdoor air to increase the outlet air temperature. Furthermore, by operating the indoor fan at a higher second speed, the flow rate of the outlet airflow after passing through the high-temperature steam barrier can be accelerated, avoiding excessive heat loss of the outlet airflow in the duct 140. This can improve the outlet air temperature, making it closer to the target temperature and preventing the outlet air temperature from falling below the target temperature, resulting in more comfortable airflow.

[0065] In addition, in cooling mode, if the difference between the outlet air temperature and the target temperature is greater than the first temperature fluctuation value T1, there are two possibilities: First, the difference between the outlet air temperature and the target temperature is greater than the second temperature fluctuation value T2, which means the difference between the outlet air temperature and the target temperature is greater than 0. In this case, the outlet air temperature is higher than the target temperature, and the cooling capacity of the indoor unit 1 of the air conditioner is insufficient. At this time, it is necessary to lower the outlet air temperature so that it is closer to the target temperature. Therefore, by operating the steam generating module 200 at a lower second power, the airflow temperature after passing through the high-temperature steam barrier will not be too high, thus keeping the outlet air temperature lower. Also, by operating the fresh air fan 300 at a lower third speed, the amount of outdoor air entering the room can be reduced, thereby reducing the heat brought into the room by the outdoor air and lowering the outlet air temperature. Finally, by operating the indoor fan at a lower fourth speed, the airflow velocity after passing through the high-temperature steam barrier is slower, allowing the airflow to enter and exit the duct 140 for cooling, thereby lowering the outlet air temperature and making it closer to the target temperature, thus avoiding insufficient cooling capacity in cooling mode. Understandably, this setting allows the indoor unit 1 of the air conditioner to operate at low power while preventing the outlet air temperature from rising further. The indoor unit 1 can increase the cooling capacity by increasing the power of the compressor, thereby lowering the temperature and making the outlet air temperature closer to the target temperature, resulting in more comfortable airflow.

[0066] Another scenario is that the difference between the outlet air temperature and the target temperature is greater than the first temperature fluctuation value T1 and less than the second temperature fluctuation value T2. In other words, the difference between the outlet air temperature and the target temperature is within the fluctuation range. At this time, the user's sensation is not obvious and it is not easy to detect. Therefore, it does not affect the user's air comfort. Thus, the power of the steam generating module 200, the air speed of the fresh air fan 300, and the air speed of the indoor fan can be kept at the preset values ​​when the unit is turned on. That is, the steam generating module 200 operates at a lower second power, the fresh air fan 300 operates at a lower third speed, and the indoor fan operates at a lower fourth speed. In this way, the outlet air temperature and the target temperature can be kept close, and the power consumption of the indoor unit 1 of the air conditioner can be maintained at a low level.

[0067] In some specific embodiments of the present invention, such as Figure 3 As shown, when the indoor unit 1 of the air conditioner is in heating mode, it has a third temperature fluctuation value T3 and a fourth temperature fluctuation value T4, where T3 < 0 and T4 > 0;

[0068] The second method includes:

[0069] If the difference between the outlet air temperature and the target temperature is less than the third temperature fluctuation value T3, the steam generation module 200 operates at the first power, the fresh air fan 300 operates at the third speed, and the indoor fan operates at the second speed.

[0070] If the difference between the outlet air temperature and the target temperature is not less than the third temperature fluctuation value T3 and not greater than the fourth temperature fluctuation value T4, then the steam generating module 200 operates at the second power, the fresh air fan 300 operates at the third speed, and the indoor fan operates at the fourth speed.

[0071] If the difference between the outlet air temperature and the target temperature is greater than the fourth temperature fluctuation value T4, the steam generation module 200 will operate at the second power, the fresh air fan 300 will operate at the first speed, and the indoor fan will operate at the fourth speed.

[0072] Among these, the first power is greater than the second power, the first rotational speed is greater than the third rotational speed, and the second rotational speed is greater than the fourth rotational speed. Furthermore, the absolute value of the third temperature fluctuation value T3 can be equal to the absolute value of the fourth temperature fluctuation value T4.

[0073] Understandably, in heating mode, when the outdoor temperature is lower than the indoor temperature, if the difference between the outlet air temperature and the target temperature is less than the third temperature fluctuation value T3, it means that the difference between the outlet air temperature and the target temperature is less than 0. At this time, the outlet air temperature is lower than the target temperature, and the heating capacity of the indoor unit 1 of the air conditioner is insufficient. Therefore, it is necessary to increase the outlet air temperature to make it closer to the target temperature. Thus, by operating the steam generating module 200 at a higher first power, the temperature of the airflow passing through the high-temperature steam barrier can be increased to improve the outlet air temperature. The fresh air fan 300 operates at a lower third speed to reduce the amount of outdoor air entering the room, thereby reducing the amount of outdoor air entering the room and improving the outlet air temperature. The indoor fan operates at a higher second speed to accelerate the flow rate of the outlet airflow after passing through the high-temperature steam barrier, avoiding excessive heat loss of the outlet airflow in the duct 140. This can improve the outlet air temperature, making it closer to the target temperature and preventing the outlet air temperature from falling below the target temperature, resulting in more comfortable airflow.

[0074] If the difference between the outlet air temperature and the target temperature is not less than the third temperature fluctuation value T3 and not greater than the fourth temperature fluctuation value T4, that is, the difference between the outlet air temperature and the target temperature is within the fluctuation range, the user's sensation is not obvious and it is not easy to detect. Therefore, it does not affect the user's air comfort. Thus, the power of the steam generating module 200, the air speed of the fresh air fan 300 and the air speed of the indoor fan can be kept at the preset values ​​when the unit is turned on. That is, the steam generating module 200 operates at the second power, the fresh air fan 300 operates at the second speed, and the indoor fan operates at the fourth speed. In this way, the outlet air temperature and the target temperature can be kept close, and the power consumption of the indoor unit 1 of the air conditioner can be maintained at a low level.

[0075] If the difference between the outlet air temperature and the target temperature is greater than the fourth temperature fluctuation value T4, it means that the difference between the outlet air temperature and the target temperature is greater than 0. At this time, the outlet air temperature is higher than the target temperature, and the heating capacity of the indoor unit 1 of the air conditioner is too large. It is necessary to reduce the outlet air temperature to make it closer to the target temperature. Therefore, by operating the steam generating module 200 at a lower second power, the airflow temperature after passing through the high-temperature steam barrier can be lowered. The fresh air fan 300 operates at a higher first speed to increase the airflow of outdoor air entering the room, thereby increasing the heat brought into the room by the outdoor air to increase the outlet air temperature. The indoor fan operates at a lower fourth speed to slow down the flow rate of the outlet airflow after passing through the high-temperature steam barrier, so that the outlet airflow can be cooled in the air duct 140. This results in a lower outlet air temperature, making the outlet air temperature closer to the target temperature, avoiding the outlet air temperature from being higher than the target temperature, and making the airflow more comfortable.

[0076] In some specific embodiments of the present invention, such as Figure 4 As shown, when the indoor unit 1 of the air conditioner is in the air supply mode, it has a fifth temperature fluctuation value T5 and a sixth temperature fluctuation value T6, where T5 < 0 and T6 > 0.

[0077] The third method includes:

[0078] If the difference between the outlet air temperature and the target temperature is less than the fifth temperature fluctuation value T5, the steam generation module 200 operates at the first power, the fresh air fan 300 operates at the third speed, and the indoor fan operates at the second speed.

[0079] If the difference between the outlet air temperature and the target temperature is not less than the fifth temperature fluctuation value T5, then the steam generation module 200 operates at the second power, the fresh air fan 300 operates at the third speed, and the indoor fan operates at the fourth speed.

[0080] Among these, the first power is greater than the second power, the first rotational speed is greater than the third rotational speed, and the second rotational speed is greater than the fourth rotational speed. Furthermore, the absolute value of the fifth temperature fluctuation value T5 can be equal to the absolute value of the sixth temperature fluctuation value T6.

[0081] Understandably, in air supply mode, the temperature difference between indoor and outdoor is usually small. If the difference between the outlet air temperature and the target temperature is less than the fifth temperature fluctuation value T5, it indicates that the outlet air temperature is lower than the target temperature. Even if the outlet air temperature after passing through the high-temperature steam barrier is still the first target temperature, it means that the outdoor temperature is lower than the indoor temperature. Therefore, it is necessary to increase the outlet air temperature. Thus, by operating the steam generator module 200 at a higher first power, the temperature of the airflow passing through the high-temperature steam barrier can be increased, thereby raising the outlet air temperature. Additionally, by operating the fresh air fan 300 at a lower third speed, the amount of outdoor air entering the room can be reduced, thus increasing the outlet air temperature. Furthermore, by operating the indoor fan at a higher second speed, the airflow velocity after passing through the high-temperature steam barrier can be accelerated, preventing excessive heat loss in the duct 140. This further increases the outlet air temperature, bringing it closer to the target temperature and preventing it from falling below the target temperature, resulting in more comfortable airflow.

[0082] If the difference between the outlet air temperature and the target temperature is not less than the fifth temperature fluctuation value T5 and less than the sixth temperature fluctuation value T6, that is, the difference between the outlet air temperature and the target temperature is within the fluctuation range, the user's sensation is not obvious and it is not easy to detect. Therefore, it does not affect the user's air comfort. Thus, the power of the steam generating module 200, the wind speed of the fresh air fan 300 and the wind speed of the indoor fan can be kept at the preset values ​​when the machine is turned on. That is, the steam generating module 200 operates at a lower second power, the fresh air fan 300 operates at a lower third speed, and the indoor fan operates at a lower fourth speed. In this way, the outlet air temperature and the target temperature can be kept close, and the power consumption of the indoor unit 1 of the air conditioner can be maintained at a low level.

[0083] If the difference between the outlet air temperature and the target temperature is greater than the sixth temperature fluctuation value T6, it means the difference is greater than 0. In this case, the outlet air temperature is higher than the target temperature, and the outlet air temperature needs to be lowered to be closer to the target temperature. Therefore, by operating the steam generating module 200 at a lower second power to prevent the airflow temperature from becoming too high after passing through the high-temperature steam barrier, and by operating the fresh air fan 300 at a lower third speed and the indoor fan at a lower fourth speed, the airflow velocity after passing through the high-temperature steam barrier is slowed down. This allows the airflow to enter and exit the duct 140 for cooling, thereby reducing the outlet air temperature and bringing it closer to the target temperature. This setup maintains the indoor unit 1 of the air conditioner at a low power, saving energy, and prevents the outlet air temperature from rising further. If the difference between the outlet air temperature and the target temperature is too large, the indoor unit 1 of the air conditioner can adjust the compressor power to change the outlet air temperature, bringing it closer to the target temperature for more comfortable airflow.

[0084] In some specific embodiments of the present invention, the indoor unit 1 of the air conditioner further includes a second sensor.

[0085] The second sensor is installed in the housing 100 and connected to the controller for detecting the indoor temperature. The controller is configured to acquire the indoor temperature detected by the second sensor when the indoor unit 1 of the air conditioner is in the air supply mode, and to adjust the target temperature to the indoor temperature detected by the second sensor.

[0086] Understandably, in air supply mode, the user does not need the indoor unit 1 of the air conditioner to change the indoor temperature. Therefore, the indoor unit 1 of the air conditioner can set the indoor temperature detected by the second sensor as the target temperature, thereby avoiding a large change in indoor temperature caused by the introduction of outdoor fresh air. This can ensure the comfort of the air supply of the indoor unit 1 of the air conditioner, and at the same time purify the indoor air by introducing outdoor fresh air in air supply mode, resulting in a better user experience.

[0087] In some specific embodiments of the present invention, the indoor unit 1 of the air conditioner further includes a second sensor and a third sensor.

[0088] The second sensor is installed in the housing 100 and connected to the controller to detect the indoor temperature. The third sensor is connected to the controller to detect the outdoor temperature. The controller is configured to, when it receives the signal to activate the steam air washing function, acquire the indoor temperature detected by the second sensor and the outdoor temperature detected by the third sensor, and determine whether the absolute value of the difference between the indoor temperature and the outdoor temperature is not greater than a preset value. If so, the fresh air inlet 120 is activated; otherwise, the indoor air inlet 110 is activated and the fresh air inlet 120 is deactivated.

[0089] Therefore, when the absolute value of the difference between indoor and outdoor temperatures is not greater than the preset value, it means that the difference between indoor and outdoor temperatures is not large. At this time, the fresh air inlet 120 and the indoor air inlet 110 can be turned on at the same time, or the fresh air inlet 120 can be turned on and the indoor air inlet 110 can be turned off. The indoor unit 1 of the air conditioner can introduce fresh outdoor air into the room, thereby purifying the indoor air through the fresh outdoor air, which is conducive to improving the quality of indoor air.

[0090] When the absolute value of the difference between indoor and outdoor temperatures is greater than the preset value, it indicates that the difference between indoor and outdoor temperatures is large. At this time, the fresh air inlet 120 can be closed and the indoor air inlet 110 can be opened. Only one indoor unit of the air conditioner will be in internal circulation, which will prevent the outdoor fresh air from entering the room and causing a large change in indoor temperature.

[0091] In some specific embodiments of the present invention, such as Figures 2-4 As shown, there are multiple preset values, and each preset value is one of the cooling preset value, heating preset value, and air supply preset value.

[0092] Specifically, when indoor unit 1 of the air conditioner is in cooling mode, the preset value is equal to the cooling preset value; when indoor unit 1 of the air conditioner is in heating mode, the preset value is equal to the heating preset value; and when indoor unit 1 of the air conditioner is in fan mode, the preset value is equal to the fan preset value. The cooling preset value, heating preset value, and fan preset value are all different.

[0093] Understandably, human sensitivity to temperature fluctuations varies depending on the ambient temperature. Therefore, different preset values ​​are set for cooling, heating, and ventilation modes. When the outdoor and indoor temperatures are lower than the cooling preset value in cooling mode, it means that even if outdoor fresh air is introduced into the room, causing indoor temperature fluctuations, users will not easily notice them. Similarly, when the outdoor and indoor temperatures are lower than the heating preset value in heating mode, it means that even if outdoor fresh air is introduced into the room, causing indoor temperature fluctuations, users will not easily notice them. And when the outdoor and indoor temperatures are lower than the ventilation preset value in ventilation mode, it means that even if outdoor fresh air is introduced into the room, causing indoor temperature fluctuations, users will not easily notice them.

[0094] This setting allows preset values ​​to be adjusted according to different seasons and the mode of the indoor air conditioner, making the airflow from the air conditioner more comfortable, avoiding large fluctuations in indoor temperature caused by outdoor fresh air entering the room, and providing a better user experience.

[0095] In some specific embodiments of the present invention, such as Figures 5-9 As shown, the steam generating module 200 includes a base 210, a water tank 220, a heating element 230, and a filter screen 240.

[0096] The base 210 is installed on the housing 100, the water tank 220 is installed on the base 210, the heating element 230 is installed on the base 210 and extends into the water tank 220, and the filter screen 240 is installed on the water tank 220 to cover the opening 221 of the water tank 220.

[0097] The fresh air fan 300 can be installed below the base 210 and inside the housing 100. The fresh air inlet 120 and the outdoor air inlet can be located below the housing 100. Since the density of steam is low, the steam generated by the steam generating module 200 will be located above the water tank 220. With this configuration, the outdoor fresh air and indoor air guided by the fresh air fan 300 can flow upward along the air duct 140 through the steam generated by the steam generating module 200, and the steam will have a better sterilization effect on the air flowing through the air duct 140.

[0098] Furthermore, by installing a filter screen 240 at the opening 221 of the water tank 220, the air flowing through the air duct 140 can be filtered and dust removed, further purifying the indoor air and improving the indoor air quality.

[0099] It should be noted that in some embodiments of the present invention, the upper end of the water tank 220 may be provided with an outlet 222. The fresh air fan 300 guides the airflow through the air duct 140, and after passing through the opening 221 of the water tank 220 and the steam generated by the steam generator module 200 for high-temperature sterilization, it can flow through the outlet 222 of the water tank 220 to the air outlet 130 of the housing 100, and then be discharged into the room.

[0100] In some specific embodiments of the present invention, such as Figures 10-12 As shown, the indoor unit 1 of the air conditioner also includes a baffle 400.

[0101] The baffle 400 is rotatably mounted on the housing 100 between a first position, a second position and a third position. When the baffle is in the first position, it blocks the fresh air inlet 120 and exposes the indoor air inlet 110. When the baffle is in the second position, it blocks the indoor air inlet 110 and exposes the fresh air inlet 120. When the baffle is in the third position, it exposes both the indoor air inlet 110 and the fresh air inlet 120.

[0102] In this way, the opening and closing of the indoor air inlet 110 and the fresh air inlet 120 can be changed by rotating the baffle 400. Specifically, when the absolute value of the difference between the indoor temperature and the outdoor temperature is not greater than the preset value, the baffle 400 can be rotated to the second position to open the fresh air inlet 120 and close the indoor air inlet 110. The indoor unit 1 of the air conditioner can rely entirely on the outdoor fresh air for heat exchange to form air conditioning air, thereby improving the purification efficiency of the outdoor fresh air for indoor air. Alternatively, the baffle 400 can be rotated to the third position to open the fresh air inlet 120 and the indoor air inlet 110, so that the outdoor fresh air can mix with the indoor air to form air conditioning air.

[0103] If the absolute value of the difference between indoor and outdoor temperatures is greater than the preset value, the baffle 400 can be rotated to the first position to open the indoor air inlet 110 and close the fresh air inlet 120. The indoor unit of the air conditioner will only circulate internally to avoid large fluctuations in indoor temperature caused by outdoor fresh air entering the room, resulting in a better user experience.

[0104] Other configurations and operations of the indoor unit 1 of the air conditioner according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0105] The indoor unit 1 of the air conditioner in this application performs a refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0106] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0107] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the indoor unit 1 of the air conditioner regulates the temperature and humidity of the indoor space.

[0108] In the description of this specification, references to terms such as "specific embodiment" or "specific example" 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 present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0109] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The housing is provided with an indoor air inlet, a fresh air inlet, an air outlet, and an air duct, wherein the air duct is connected to the indoor air inlet, the fresh air inlet, and the air outlet, respectively; A steam generating module is installed inside the housing to generate steam. The gas in the air duct passes through the steam generated by the steam generating module to form purified gas, which is discharged from the air outlet. A fresh air fan is installed inside the air duct to guide outdoor air from the fresh air inlet into the air duct. An indoor fan, installed inside the air duct, is used to guide indoor air from the indoor air inlet to the air duct; The first sensor, installed in the housing, is used to detect the air outlet temperature of the indoor unit of the air conditioner; The controller is installed inside the housing and is connected to the steam generating module, the fresh air fan, the indoor fan and the first sensor respectively; The controller is configured to, upon receiving a signal indicating that the steam air washing function is activated, control the steam generating module to generate steam, acquire the target temperature and the outlet air temperature detected by the first sensor, and, when the indoor unit of the air conditioner is in cooling mode, heating mode, or air supply mode, adjust the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan according to different methods based on the difference between the outlet air temperature and the target temperature. When the indoor unit of the air conditioner is in cooling mode, adjust the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan according to the first method. When the indoor unit of the air conditioner is in cooling mode, it has a first temperature fluctuation value T1 and a second temperature fluctuation value T2, wherein T1 < 0 and T2 > 0. The first method includes: If the difference between the outlet air temperature and the target temperature is less than the first temperature fluctuation value T1, then the steam generating module operates at the first power, the fresh air fan operates at the first speed, and the indoor fan operates at the second speed. If the difference between the outlet air temperature and the target temperature is not less than the first temperature fluctuation value T1, then the steam generating module operates at the second power, the fresh air fan operates at the third speed, and the indoor fan operates at the fourth speed, wherein the first power is greater than the second power, the first speed is greater than the third speed, and the second speed is greater than the fourth speed.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, When the indoor unit of the air conditioner is in heating mode, it has a third temperature fluctuation value T3 and a fourth temperature fluctuation value T4, wherein T3 < 0 and T4 > 0. When the indoor unit of the air conditioner is in heating mode, the controller adjusts the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan using a second method, wherein the second method includes: If the difference between the outlet air temperature and the target temperature is less than the third temperature fluctuation value T3, then the steam generating module operates at the first power, the fresh air fan operates at the third speed, and the indoor fan operates at the second speed. If the difference between the outlet air temperature and the target temperature is not less than the third temperature fluctuation value T3 and not greater than the fourth temperature fluctuation value T4, then the steam generating module operates at the second power, the fresh air fan operates at the third speed, and the indoor fan operates at the fourth speed. If the difference between the outlet air temperature and the target temperature is greater than the fourth temperature fluctuation value T4, then the steam generating module operates at the second power, the fresh air fan operates at the first speed, and the indoor fan operates at the fourth speed. Wherein, the first power is greater than the second power, the first rotational speed is greater than the third rotational speed, and the second rotational speed is greater than the fourth rotational speed.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, When the indoor unit of the air conditioner is in the air supply mode, it has a fifth temperature fluctuation value T5 and a sixth temperature fluctuation value T6, wherein T5 < 0 and T6 > 0; When the indoor unit of the air conditioner is in air supply mode, the controller adjusts the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan using a third method, wherein the third method includes: If the difference between the outlet air temperature and the target temperature is less than the fifth temperature fluctuation value T5, then the steam generating module operates at the first power, the fresh air fan operates at the third speed, and the indoor fan operates at the second speed. If the difference between the outlet air temperature and the target temperature is not less than the fifth temperature fluctuation value T5, then the steam generating module operates at the second power, the fresh air fan operates at the third speed, and the indoor fan operates at the fourth speed. Wherein, the first power is greater than the second power, the first rotational speed is greater than the third rotational speed, and the second rotational speed is greater than the fourth rotational speed.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, Also includes: The second sensor, installed in the housing and connected to the controller, is used to detect the indoor temperature; The controller is configured to, when the indoor unit of the air conditioner is in the air supply mode, acquire the indoor temperature detected by the second sensor, and adjust the target temperature to the indoor temperature detected by the second sensor.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: The second sensor, installed in the housing and connected to the controller, is used to detect the indoor temperature; The third sensor, connected to the controller, is used to detect the outdoor temperature; The controller is configured to, when receiving a signal to activate the steam air washing function, acquire the indoor temperature detected by the second sensor and the outdoor temperature detected by the third sensor, determine whether the absolute value of the difference between the indoor temperature and the outdoor temperature is not greater than a preset value, and if so, open the fresh air inlet; otherwise, open the indoor air inlet and close the fresh air inlet.

6. The indoor unit of the air conditioner according to claim 5, characterized in that, The preset value is multiple and is one of the cooling preset value, heating preset value, and air supply preset value; When the indoor unit of the air conditioner is in cooling mode, the preset value is equal to the cooling preset value; When the indoor unit of the air conditioner is in heating mode, the preset value is equal to the heating preset value; When the indoor unit of the air conditioner is in the air supply mode, the preset value is equal to the air supply preset value; The preset values ​​for cooling, heating, and air supply are all different.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, After obtaining the steam air washing function signal, before adjusting the power of the steam generating module, the speed of the fresh air fan, and the speed of the indoor fan; The steam generating module operates at the lowest power, the fresh air fan operates at the lowest speed, and the indoor fan operates at the lowest speed.

8. The indoor unit of the air conditioner according to claim 1, characterized in that, The steam generating module includes: A base, which is mounted on the housing; A water tank is mounted on the base. A heating element, which is mounted on the base and extends into the water tank; A filter screen is installed in the water tank to cover the opening of the water tank.

9. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: A baffle is rotatably mounted on the housing between a first position, a second position, and a third position. When the baffle is in the first position, it blocks the fresh air inlet and exposes the indoor air inlet. When the baffle is in the second position, it blocks the indoor air inlet and exposes the fresh air inlet. When the baffle is in the third position, it exposes both the indoor air inlet and the fresh air inlet. When the indoor unit of the air conditioner is turned off, the baffle is in the first position.

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