Indoor unit, air conditioner and its control method

Abstract

This invention provides an indoor unit, an air conditioner, and a control method thereof. The indoor unit includes: a base shell with an air outlet duct and an air outlet; and a sweeping structure, which includes at least a fluid oscillator rotatably disposed within the air outlet duct. Multiple fluid oscillators are spaced apart along the length of the indoor unit, forming a first air outlet channel between adjacent oscillators for at least a portion of the airflow. A second air outlet channel is provided within each fluid oscillator for at least a portion of the airflow to pass through, and the second air outlet channel is used to generate an oscillating airflow. Applying the technical solution of this invention, the airflow in the air outlet duct generates a vertically self-excited oscillating airflow after passing through the fluid oscillators. Combined with the left and right sweeping of the fluid oscillators, the airflow has a strong oscillating effect in both the vertical and horizontal directions, achieving an oscillating airflow effect, avoiding direct airflow onto the human body, and improving airflow comfort.

Description

Technical Field

[0001] This invention relates to the field of air conditioners, and more specifically, to an indoor unit, an air conditioner, and a control method thereof. Background Technology

[0002] With the development of science and technology and the improvement of people's living standards, the requirements for air conditioners have evolved from simple cooling and heating functions to energy saving, comfort, and health. Current air conditioner manufacturers are paying increasing attention to the comfort of the human body when the air is blown out, and have introduced functions such as "top airflow for cooling and bottom airflow for heating." To avoid the air conditioner blowing directly on the human body, micro-perforated air outlets and various air diffusion functions have been introduced.

[0003] However, existing patents regarding comfort air supply and sweeping structures include microporous sweeping blades, flexible sweeping blades, and air diffuser components. Microporous sweeping blades significantly impede airflow. Flexible sweeping blades require high-quality materials and cannot achieve precise control over material deformation. Air diffuser components, in order to obtain a wide range of airflow adjustment angles, have complex adjustment structures. These structural limitations mean that the problem of airflow directly blowing onto people remains unresolved. Summary of the Invention

[0004] The main objective of this invention is to provide an indoor unit, an air conditioner, and a control method thereof to solve the problem of airflow blowing directly on people in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, an indoor unit is provided, comprising: a base shell having an air outlet duct having an air outlet; and a sweeping structure including at least a fluid oscillator rotatably disposed within the air outlet duct. The fluid oscillators are a plurality of each other, spaced apart along the length of the indoor unit, with a first air outlet channel formed between adjacent fluid oscillators for at least a portion of the airflow to pass through. A second air outlet channel is provided within each fluid oscillator for at least a portion of the airflow to pass through, the second air outlet channel being used to form an oscillating airflow.

[0006] Furthermore, the fluid oscillator has an oscillator inlet, an oscillator outlet, and a rotating shaft. The two ends of the second air outlet channel inside the fluid oscillator are connected to the oscillator inlet and the oscillator outlet, respectively. The second air outlet channel extends along the air outlet direction of the air outlet duct, and the rotating shaft extends along the height direction of the air outlet duct. The rotation of the rotating shaft can drive the fluid oscillator to rotate.

[0007] Furthermore, the air-sweeping structure also includes: a cover plate, which is disposed within the air outlet duct and extends along the length of the indoor unit; the cover plate has multiple first mounting holes, and the first end of the rotating shaft is connected to the cover plate through the first mounting holes; a base plate, which is disposed within the air outlet duct and extends along the length of the indoor unit; the base plate has multiple second mounting holes; and a drive assembly, which is disposed within the bottom shell; the output end of the drive assembly is connected to the second end of the rotating shaft through the second mounting holes; the drive assembly is used to drive the rotating shaft to rotate, thereby driving the fluid oscillator to rotate.

[0008] Furthermore, the drive assembly includes: a transmission assembly, the first end of which is connected to the second end of the rotating shaft through a second mounting hole; and a drive unit, the output end of which is connected to the second end of the transmission assembly, the drive unit driving the transmission assembly to move, thereby driving the fluid oscillator to rotate.

[0009] Furthermore, the transmission assembly includes: a first crank, the first end of which is connected to the second end of the shaft through a second mounting hole; a connecting rod, the first end of which is connected to the second end of the first crank; a second crank, the first end of which is connected to the second end of the connecting rod, and the second end of which is connected to the output end of the drive unit; the drive unit controls the rotation of the fluid oscillator through the second crank, the connecting rod, and the first crank.

[0010] Furthermore, the air-sweeping structure also includes: a guide vane, which is disposed in the air outlet duct and is positioned close to the oscillator inlet. The guide vane is rotatably disposed around the length of the indoor unit. The guide vane has a guiding position for opening the oscillator inlet and a blocking position for blocking the oscillator inlet.

[0011] According to another aspect of the present invention, an air conditioner is provided, the air conditioner including an indoor unit, the indoor unit being the one described above.

[0012] According to another aspect of the present invention, a control method for an air conditioner is provided. The control method is used to control the air conditioner described above. The control method includes the following steps: acquiring a target ambient temperature and a current indoor temperature; determining a temperature difference between the target ambient temperature and the current indoor temperature based on the target ambient temperature and the current indoor temperature; if the temperature difference does not meet a preset temperature difference condition, controlling the air guide vane to remain in the blocking position and controlling the air conditioner to turn off the oscillating sweep mode; if the temperature difference meets the preset temperature difference condition, controlling the air guide vane to rotate to the air guide position and controlling the air conditioner to enter the oscillating sweep mode.

[0013] Furthermore, the oscillation sweeping mode includes at least a static sweeping mode, and the control method includes the following steps: when the oscillation sweeping mode is determined to be a static sweeping mode, the fluid oscillator is controlled to rotate along a first preset direction; the rotation angle of the fluid oscillator is detected; when the rotation angle meets the preset angle condition, the fluid oscillator is controlled to stop rotating.

[0014] Furthermore, the oscillation sweeping mode also includes a dynamic sweeping mode, and the control method further includes the following steps: when the oscillation sweeping mode is determined to be a dynamic sweeping mode, the fluid oscillator is controlled to perform a sweeping action along a second preset direction at a preset sweeping frequency.

[0015] Furthermore, the preset sweeping frequency is f1, and the oscillation frequency of the fluid oscillator is f2, where 0.5f2≤f1≤f2.

[0016] Applying the technical solution of this invention, a fluid oscillator is rotatably installed within the air outlet duct. Since the fluid oscillator can swing left and right, when it swings left and right at a certain frequency, it can form a fixed-frequency left-right sweeping airflow. The sweeping structure consists of more than one fluid oscillator, with gaps between adjacent oscillators. The airflow in the air outlet duct can pass through either the first air outlet channel between the fluid oscillators or the second air outlet channel inside the oscillator. After passing through the fluid oscillator, the airflow in the air outlet duct generates a vertically self-excited oscillating airflow. Combined with the left-right sweeping airflow of the fluid oscillator itself, the airflow has a strong oscillation effect in both the vertical and horizontal directions. The airflow is fully mixed, improving heat exchange performance and achieving an oscillating airflow effect. This avoids direct airflow onto the human body, increases the dynamic air supply range of the air conditioner, facilitates rapid temperature conduction, and provides better comfort and rapid cooling and heating effects, effectively improving airflow comfort. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of the indoor unit according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of a second embodiment of the indoor unit according to the present invention is shown;

[0020] Figure 3 An exploded structural diagram of an embodiment of the sweeping structure according to the present invention is shown;

[0021] Figure 4 A schematic diagram of a first embodiment of the sweeping structure according to the present invention is shown;

[0022] Figure 5 A schematic diagram of a first embodiment of the sweeping structure according to the present invention is shown, with cross-section AA.

[0023] Figure 6 A schematic diagram of the second embodiment of the sweeping structure according to the present invention is shown in cross section AA;

[0024] Figure 7 A schematic diagram of a second embodiment of the sweeping structure according to the present invention is shown;

[0025] Figure 8 A schematic diagram of the structure of a third embodiment of the indoor unit according to the present invention is shown;

[0026] Figure 9 A schematic diagram illustrating the air outlet effect of the indoor unit according to the present invention is shown;

[0027] Figure 10 A schematic diagram of an embodiment of the fluid oscillator according to the present invention is shown;

[0028] Figure 11 A flowchart illustrating the control method for an air conditioner according to the present invention is shown.

[0029] The above figures include the following reference numerals:

[0030] 100. Bottom shell; 101. Air outlet duct;

[0031] 200. Cross-flow fan;

[0032] 300. Sweeping structure;

[0033] 10. Fluid oscillator; 11. Oscillator inlet; 12. Oscillator outlet; 13. Rotating shaft; 14. First resonant cavity; 15. Second resonant cavity; 16. Mixing cavity;

[0034] 20. Guide vane; 21. Drive motor;

[0035] 30. Cover plate; 31. First assembly hole;

[0036] 40. Base plate; 41. Second assembly hole;

[0037] 50. First crank; 60. Connecting rod; 70. Second crank; 80. Drive unit;

[0038] F1, Inlet airflow; F2, Oscillating airflow; F3, Ordinary airflow. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0043] Combination Figures 1 to 10 As shown, according to a specific embodiment of this application, an indoor unit is provided.

[0044] The indoor unit includes a base shell 100 and a swing structure 300. The base shell 100 has an air outlet duct 101 with an air outlet. The swing structure 300 includes at least a fluid oscillator 10, which is rotatably disposed in the air outlet duct 101. There are multiple fluid oscillators 10, which are spaced apart along the length of the indoor unit. A first air outlet channel is formed between adjacent fluid oscillators 10 for at least part of the airflow to pass through. A second air outlet channel is provided in the fluid oscillator 10 for at least part of the airflow to pass through, and the second air outlet channel is used to form an oscillating airflow.

[0045] Applying the technical solution of this embodiment, the fluid oscillator 10 is rotatably disposed within the air outlet duct 101. Since the fluid oscillator 10 can swing left and right, when the fluid oscillator 10 swings left and right at a certain frequency, it can form a fixed frequency of left and right sweeping air. The sweeping structure 300 is composed of more than one fluid oscillator 10, with gaps between adjacent fluid oscillators 10. The airflow in the air outlet duct 101 can pass through either the first air outlet channel between the fluid oscillators 10 or the second air outlet channel inside the oscillator. After passing through the fluid oscillator 10, the airflow in the air outlet duct 101 can generate vertically self-excited oscillating airflow. Combined with the left and right sweeping airflow of the fluid oscillator 10 itself, the airflow has a strong oscillation effect in both the vertical and horizontal directions. The airflow is fully mixed, improving heat exchange performance and achieving an oscillating air outlet effect. This avoids the airflow blowing directly onto the human body, increases the dynamic air supply range of the air conditioner, facilitates rapid temperature conduction, and has good comfort and rapid cooling and heating effects, effectively improving the comfort of the air outlet.

[0046] like Figure 9 As shown, at the air outlet of the air outlet duct 101, the airflow includes oscillating airflow F2 and ordinary airflow F3. The self-excited oscillation of the fluid oscillator 10 makes the oscillating airflow F2 have a vertical oscillation effect. When the fluid oscillator 10 swings left and right, the oscillating airflow F2 also produces an oscillation effect in the horizontal direction. At this time, the airflow at the air outlet is fully mixed to achieve the oscillating air outlet effect.

[0047] It should be noted that the fluid oscillator 10 in this embodiment can be a Coanda swept oscillator or a jet-coupled oscillator. The fluid oscillator 10 has the advantages of having no moving parts, simple structure, large outlet jet flow, self-excited oscillation, and self-excited maintenance. After the airflow passes through the fluid oscillator 10, it generates a vertically self-excited oscillating airflow. When the fluid oscillator 10 swings left and right at a certain frequency, it can form a fixed frequency left and right sweeping airflow.

[0048] like Figure 10As shown, the fluid oscillator 10 can be a Coanda swept oscillator without a feedback channel. The Coanda swept oscillator has an oscillator inlet 11, a first resonant cavity 14, a second resonant cavity 15, a mixing cavity 16, an outlet throat, and an oscillator outlet 12. The Coanda swept oscillator uses the resonant cavities on both sides of the main flow channel to generate pressure fluctuations when the jet adheres to the wall, thereby driving the main flow to deflect.

[0049] Furthermore, the fluid oscillator 10 has an oscillator inlet 11, an oscillator outlet 12, and a rotating shaft 13. The two ends of the second air outlet channel inside the fluid oscillator 10 are connected to the oscillator inlet 11 and the oscillator outlet 12, respectively. The second air outlet channel extends along the air outlet direction of the air outlet duct 101, and the rotating shaft 13 extends along the height direction of the air outlet duct 101. The rotation of the rotating shaft 13 can drive the fluid oscillator 10 to rotate.

[0050] In this embodiment, the rotating shaft 13 extends along the height direction of the air outlet duct 101. By driving the rotating shaft 13 to rotate, the fluid oscillator 10 can be driven to swing left and right to achieve a left and right sweeping effect.

[0051] Furthermore, the air-sweeping structure 300 also includes a cover plate 30, a base plate 40, and a drive assembly. The cover plate 30 is disposed within the air outlet duct 101 and extends along the length of the indoor unit. The cover plate 30 has multiple first mounting holes 31, and the first end of the rotating shaft 13 is connected to the cover plate 30 through the first mounting holes 31. The base plate 40 is disposed within the air outlet duct 101 and extends along the length of the indoor unit. The base plate 40 has multiple second mounting holes 41. The drive assembly is disposed within the bottom shell 100, and the output end of the drive assembly is connected to the second end of the rotating shaft 13 through the second mounting holes 41. The drive assembly is used to drive the rotating shaft 13 to rotate, thereby driving the fluid oscillator 10 to rotate.

[0052] In this embodiment, the fluid oscillator 10 is fixed in position by the cover plate 30 and the base plate 40. The size of the first air outlet channel is adjusted by adjusting the distance between the multiple first mounting holes 31 and the distance between the multiple second mounting holes 41, thereby obtaining a more suitable air outlet effect. The first mounting holes 31 and the second mounting holes 41 are arranged in a one-to-one correspondence. By adjusting the position of the first mounting holes 31 and the second mounting holes 41 in the height direction of the air outlet channel 101, the rotation center line position of the fluid oscillator 10 can be adjusted.

[0053] Furthermore, the drive assembly includes a transmission assembly and a drive unit 80. The first end of the transmission assembly is connected to the second end of the rotating shaft 13 through the second mounting hole 41. The output end of the drive unit 80 is connected to the second end of the transmission assembly. The drive unit 80 drives the transmission assembly to move, thereby driving the fluid oscillator 10 to rotate.

[0054] In this embodiment, the drive unit 80 is a drive motor. The number of drive motors can be set according to actual needs. For example, each fluid oscillator 10 can be assigned to one drive motor, a preset number of fluid oscillators 10 can be assigned to one drive motor, or all fluid oscillators 10 can be assigned to one drive motor.

[0055] Furthermore, the transmission assembly includes a first crank 50, a connecting rod 60, and a second crank 70. The first end of the first crank 50 is connected to the second end of the rotating shaft 13 through the second mounting hole 41; the first end of the connecting rod 60 is connected to the second end of the first crank 50; the first end of the second crank 70 is connected to the second end of the connecting rod 60, and the second end of the second crank 70 is connected to the output end of the drive unit 80; the drive unit 80 controls the rotation of the fluid oscillator 10 through the second crank 70, the connecting rod 60, and the first crank 50.

[0056] In this embodiment, a crank-connecting rod mechanism is used for transmission, which has a simple structure, is easy to implement, and can effectively reduce manufacturing costs. Depending on actual needs, the transmission component can also be set as a worm gear mechanism or other transmission components.

[0057] Furthermore, the air sweeping structure 300 also includes a guide vane 20, which is disposed in the air outlet duct 101 and is located close to the oscillator inlet 11. The guide vane 20 is rotatably disposed around the length of the indoor unit. The guide vane 20 has a guiding position for opening the oscillator inlet 11 and a blocking position for blocking the oscillator inlet 11.

[0058] In this embodiment, a rotatable guide vane 20 is provided at the oscillator inlet 11, such as... Figure 5 As shown, when the guide vane rotates to the first angle, the guide vane 20 is in the guiding position, which facilitates the inlet airflow F1 to better enter the fluid oscillator 10 along the surface of the guide vane 20. At this time, the guide vane 20 has the function of guiding the inlet airflow F1; as Figure 6 As shown, when the guide vane is rotated to the second angle, the guide vane 20 is in the blocking position, which can block the airflow from entering the fluid oscillator 10.

[0059] In one exemplary embodiment of this application, a drive motor 21 is also provided to control the rotation of the guide vane 20. Two drive motors 21 are provided, located at opposite ends of the guide vane 20. Depending on actual needs, only one drive motor 21 may be provided for driving.

[0060] According to another specific embodiment of this application, an air conditioner is provided, which includes an indoor unit, and the indoor unit is the same as the one described in the above embodiment.

[0061] According to another specific embodiment of this application, a control method for an air conditioner is provided. The control method is used to control the air conditioner in the above embodiment, and the control method includes the following steps:

[0062] Step S1: Obtain the target ambient temperature and the current indoor temperature;

[0063] In step S1, the target ambient temperature can be a user-set temperature or a default temperature value pre-stored in the air conditioner controller. The default temperature value can be calculated and determined based on the current indoor temperature, outdoor ambient temperature, etc.

[0064] Step S2: Determine the temperature difference between the target ambient temperature and the current indoor temperature based on the target ambient temperature and the current indoor temperature;

[0065] Step S3: If the temperature difference does not meet the preset temperature difference condition, control the guide vane 20 to remain in the blocking position and control the air conditioner to turn off the oscillation sweep mode.

[0066] Step S4: When the temperature difference meets the preset temperature difference condition, control the guide vane 20 to rotate to the guide position and control the air conditioner to enter the oscillation sweep mode.

[0067] By applying the technical solution of this embodiment, the temperature difference is determined based on the target ambient temperature and the current indoor temperature. When the temperature difference meets the preset temperature difference condition, it can be considered that the indoor temperature has reached the user's expectation. At this time, the guide vane 20 is controlled to rotate to the guide position to guide the flow, so that the fluid oscillator 10 can realize the airflow oscillation function, obtain the oscillation air outlet effect, and improve the air outlet comfort.

[0068] Furthermore, the oscillating sweep mode includes at least a static sweep mode, and the control method includes the following steps:

[0069] Step S410: When the oscillation sweeping mode is determined to be the static sweeping mode, the fluid oscillator 10 is controlled to rotate along the first preset direction;

[0070] It should be understood that the first preset direction can be the clockwise or counterclockwise direction of the rotating shaft, which in turn drives the air conditioner to blow air to the left or right.

[0071] Step S411: Detect the rotation angle of the fluid oscillator 10;

[0072] Step S412: When the rotation angle meets the preset angle condition, control the fluid oscillator 10 to stop rotating.

[0073] In step S412, the preset angle condition can be the target air outlet angle set by the user through the air conditioner remote control, the air conditioner control interface on the mobile phone, voice input, etc. When the fluid oscillator 10 rotates to the target air outlet angle, the fluid oscillator 10 stops rotating, and the air conditioner maintains the target air outlet angle to output air.

[0074] Through steps S410-S412, in static swing mode, the fluid oscillator 10 rotates to a certain angle and then stops and remains there, so that the air conditioner always maintains airflow in one direction, which meets the user's airflow needs.

[0075] Furthermore, the oscillating sweep mode also includes a dynamic sweep mode, and the control method further includes the following steps:

[0076] Step S420: When the oscillation sweeping mode is determined to be the dynamic sweeping mode, the fluid oscillator 10 is controlled to perform a sweeping action along the second preset direction at a preset sweeping frequency.

[0077] In step S420, when the sweeping action is performed, the fluid oscillator 10 rotates back and forth. The frequency of the reciprocating rotation is the preset sweeping frequency. The second preset direction includes the clockwise direction and the counterclockwise direction of the rotating shaft 13. It should be understood that the rotation speed of the clockwise rotation and the rotation speed of the counterclockwise rotation can be the same or different.

[0078] Through step S420, the air-sweeping action in dynamic air-sweeping mode can make the air outlet range continuously change, which is suitable for situations where the air blowing demand is relatively dispersed in the indoor environment, and is conducive to the equalization of indoor temperature.

[0079] Preferably, the preset swing frequency is f1, and the oscillation frequency of the fluid oscillator 10 is f2, wherein 0.5f2≤f1≤f2. The preset swing frequency is related to the oscillation frequency of the fluid oscillator 10, which can further improve the comfort of the airflow.

[0080] This application provides a preferred embodiment of an indoor unit and its control method.

[0081] Specifically, the indoor unit includes a swing structure 300, which is rotatably mounted inside the bottom casing 100 of the air conditioner. The bottom casing 100 also houses components such as a cross-flow fan 200. The swing structure 300 mainly consists of at least one fluid oscillator 10, a cover plate 30, a base plate 40, a first crank 50, a connecting rod 60, a second crank 70, and a drive unit 80.

[0082] The fluid oscillator 10 also includes an oscillator inlet 11, an oscillator outlet 12, and a rotating shaft 13. The top end of the rotating shaft 13 is assembled with the cover plate 30 through a first mounting hole 31 to fix the fluid oscillator 10. The bottom end of the rotating shaft 13 passes through a second mounting hole 41 on the base plate 40 and is assembled with a first crank 50. The first crank 50 is assembled with a connecting rod 60. One end of a second crank 70 is assembled with the connecting rod 60, and the other end is assembled with a drive unit 80. Thus, the drive unit 80 can control the rotation of the fluid oscillator 10 via the second crank 70, connecting rod 60, and first crank 50.

[0083] The inlet of the fluid oscillator 10 is also provided with a guide vane 20 and a drive motor 21 for controlling the rotation of the guide vane (e.g., Figure 3 , Figure 8 As shown). When the guide vane rotates to the first angle (as shown). Figure 5 As shown), the airflow can be better guided to the oscillator inlet 11. When the guide vane rotates to the second angle (as shown), the airflow can be better guided to the oscillator inlet 11. Figure 6 As shown, the airflow can be blocked from entering the oscillator inlet 11, thereby shutting off the oscillation airflow effect. The guide vane 20 has an arc-shaped structure. When the guide vane rotates to the first angle, it has a good guiding effect. When the guide vane rotates to the second angle, the obstruction effect on the airflow is smaller.

[0084] The location of the swept structure within the main air duct is as follows: Figure 8 As shown, when the guide vane 20 rotates to the first angle, the airflow in the outlet duct 101 can either pass through the gap between the fluid oscillators 10 to form ordinary airflow F3, or pass through the internal channel of the oscillator to form oscillating airflow F2 (as shown). Figure 9 (As shown). The oscillating airflow F2 and the ordinary airflow F3 exchange momentum, which can achieve better mixing and prevent the ordinary airflow from blowing directly on the human body.

[0085] The drive unit 80 drives the fluid oscillator 10 to swing left and right, enabling left and right air sweeping functions. The left and right swinging of the air sweeping mechanism corresponds to two different air sweeping modes: static air sweeping mode and dynamic air sweeping mode. The setting of static air sweeping mode and dynamic air sweeping mode can effectively solve the problem of the single air outlet mode in existing air conditioners.

[0086] Static sweeping mode: Users can activate the sweeping function via remote control. When the user-set angle is reached, pressing the sweeping function button again will keep the sweeping structure at a fixed angle.

[0087] Dynamic sweeping mode: The air guide structure sweeps left and right at a constant frequency f1, where f1 can be set according to the oscillation frequency f2 of the fluid oscillator 10. Preferably, 0.5f2≤f1≤f2. The oscillation frequency f2 of the fluid oscillator is related to the size of the oscillator and the flow velocity in the main air duct, and can be obtained by measuring the flow velocity of the airflow at the oscillator outlet.

[0088] Indoor unit control methods such as Figure 11 As shown:

[0089] After the air conditioner is turned on, the user sets the temperature T0, and the air conditioner obtains the indoor temperature T1. The absolute value of the difference between T0 and T1 is compared. If this absolute value does not exceed 0.5 degrees Celsius, the indoor temperature is considered to have reached the user's desired temperature. At this point, the air guide vane 20 can be controlled to rotate to the first angle, activating the oscillating airflow mode to improve airflow comfort. To meet the user's airflow needs in different positions within the room, the airflow mode of the airflow structure is selected based on the user's previously set mode (i.e., static airflow mode and dynamic airflow mode).

[0090] The air conditioner in this embodiment has several beneficial effects: the sweeping structure 300 can swing left and right, and when the fluid oscillator 10 swings left and right at a certain frequency, it can form a fixed-frequency left and right sweeping. The sweeping structure consists of more than one fluid oscillator 10. The airflow in the air outlet duct 101 can generate a vertically self-excited oscillating airflow after passing through the fluid oscillator 10. Combined with the left and right sweeping, the airflow has a strong oscillation effect in both the vertical and horizontal directions, the airflow is fully mixed, the heat exchange performance is improved, the problem of excessively long cooling and heating time of the air conditioner is solved, and the comfort effect is better.

[0091] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0092] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An indoor unit, characterized by, The application relates to an air sweeping structure of an air conditioner indoor unit. The air sweeping structure comprises a bottom shell (100) provided with an air outlet air duct (101) and an air sweeping structure (300) comprising fluid oscillators (10) rotatably arranged in the air outlet air duct (101). The fluid oscillators (10) are arranged along the length direction of the indoor unit, and the adjacent fluid oscillators (10) form a first air outlet channel for at least part of air flow. The fluid oscillators (10) are provided with a second air outlet channel for at least part of air flow.

2. The indoor unit of claim 1, characterized in that, The fluid oscillators (10) are provided with an oscillator inlet (11) and an oscillator outlet (12) in communication with the two ends of the second air outlet channel.

3. The indoor unit of claim 2, characterized in that, The air sweeping structure (300) further comprises a cover plate (30) arranged in the air outlet air duct (101) and extending along the length direction of the indoor unit. The cover plate (30) is provided with a plurality of first assembly holes (31) for connecting the first end of the rotating shaft (13) with the cover plate (30). The air sweeping structure (300) further comprises a bottom plate (40) arranged in the air outlet air duct (101) and extending along the length direction of the indoor unit. The bottom plate (40) is provided with a plurality of second assembly holes (41).

4. The indoor unit of claim 3, characterized in that, The air sweeping structure (300) further comprises a drive assembly arranged in the bottom shell (100) and connected with the second end of the rotating shaft (13) through the second assembly holes (41). The drive assembly is used for driving the rotating shaft (13) to rotate, thereby driving the fluid oscillators (10) to rotate. The drive assembly comprises a transmission assembly and a driving part (80).

5. The indoor unit of claim 4, characterized in that, The transmission assembly is connected with the second end of the rotating shaft (13) through the second assembly holes (41). The driving part (80) is connected with the second end of the transmission assembly. The driving part (80) drives the transmission assembly to move, thereby driving the fluid oscillators (10) to rotate. The transmission assembly comprises a first crank (50), a connecting rod (60) and a second crank (70). The first end of the first crank (50) is connected with the second end of the rotating shaft (13) through the second assembly holes (41). The first end of the connecting rod (60) is connected with the second end of the first crank (50). The second end of the connecting rod (60) is connected with the first end of the second crank (70). The second end of the second crank (70) is connected with the second end of the transmission assembly. A second crank (70) has a first end connected to a second end of the connecting rod (60), and has a second end connected to an output end of the driving part (80); The driving part (80) controls the fluid oscillator (10) to rotate through the second crank (70), the connecting rod (60), and the first crank (50).

6. The indoor unit of claim 2, wherein, The air sweeping structure (300) further comprises: A guide vane (20) is arranged in the air outlet air duct (101), and is arranged close to the oscillator inlet (11), and is rotatably arranged around the length direction of the indoor unit; The guide vane (20) has a guide position for opening the oscillator inlet (11), and has a blocking position for shielding the oscillator inlet (11).

7. An air conditioner characterized by comprising: The air conditioner comprises an indoor unit, and the indoor unit is the indoor unit according to any one of claims 1-6.

8. A control method of an air conditioner, characterized by, The control method is used for controlling the air conditioner according to claim 7, and comprises the following steps: Obtaining a target environment temperature and a current indoor temperature; Based on the target environment temperature and the current indoor temperature, determining a temperature difference value of the target environment temperature and the current indoor temperature; In the case that the temperature difference value does not satisfy a preset temperature difference condition, controlling the guide vane (20) to keep the blocking position, and controlling the air conditioner to close the oscillation air sweeping mode; In the case that the temperature difference value satisfies the preset temperature difference condition, controlling the guide vane (20) to rotate to the guide position, and controlling the air conditioner to enter the oscillation air sweeping mode.

9. The control method of the air conditioner according to claim 8, characterized by, The oscillation air sweeping mode at least comprises a static air sweeping mode, and the control method comprises the following steps: In the case that the oscillation air sweeping mode is determined as the static air sweeping mode, controlling the fluid oscillator (10) to rotate in a first preset direction; Detecting a rotation angle of the fluid oscillator (10); In the case that the rotation angle satisfies a preset angle condition, controlling the fluid oscillator (10) to stop rotating.

10. The control method of the air conditioner according to claim 8, characterized by, The oscillation air sweeping mode further comprises a dynamic air sweeping mode, and the control method further comprises the following steps: In the case that the oscillation air sweeping mode is determined as the dynamic air sweeping mode, controlling the fluid oscillator (10) to perform an air sweeping action in a second preset direction at a preset air sweeping frequency.

11. The control method of an air conditioner according to claim 10, wherein The preset air sweeping frequency is f 1, the oscillation frequency of the fluid oscillator (10) is f 2, wherein 0.5 f 2≤ f 1≤ f 2.

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