Air conditioner indoor unit and air conditioner system

Abstract

The embodiment of the utility model provides an air conditioner indoor unit and an air conditioner system. The air conditioner indoor unit comprises a machine shell and an air duct assembly. The machine shell is provided with an upper air opening in the top and a lower air opening in the bottom. The air duct assembly comprises a rotary air duct structure and a cross-flow fan blade, the rotary air duct structure comprises an air duct wall and a volute tongue which are used for discharging air for the cross-flow fan blade, the rotary air duct structure rotates so as to be switched between a first position and a second position, and the volute tongue is located at the first position. An outlet of an air outlet channel formed between the air channel wall and the volute tongue faces the upper air opening so that the upper air opening can form an air outlet. At the second position, an outlet of an air outlet duct formed between the air duct wall and the volute tongue faces the lower air opening, so that the lower air opening forms an air outlet; the air duct wall and the volute tongue are arranged in a split mode. The air duct wall and the volute tongue are arranged in a split mode, so that a mold for manufacturing the air duct wall and the volute tongue is easy to manufacture, and the problem of injection molding deformation caused by the large integral forming size is effectively solved.

Description

Technical Field

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

[0002] Conventional air conditioner indoor units use a single air outlet structure, with the outlet located at the bottom of the unit. Both cooling and heating air are blown out through this outlet. Because the outlet is located at the bottom of the unit, in cooling mode, cold air can easily blow directly onto people, causing discomfort and potentially leading to air conditioning sickness over time. Even adjusting the angle of the air deflector to change the airflow direction cannot completely solve this problem.

[0003] It should be noted that the statements in this background section only provide background information relevant to this application and do not necessarily constitute prior art. Utility Model Content

[0004] This application provides an indoor air conditioning unit and an air conditioning system to improve user comfort.

[0005] The first aspect of this application provides an indoor unit for an air conditioner, comprising:

[0006] The housing has an upper air vent at the top and a lower air vent at the bottom; and

[0007] A duct assembly includes a rotating duct structure and a cross-flow fan blade. The rotating duct structure includes a duct wall and a volute for discharging air to the cross-flow fan blade. The rotating duct structure rotates to switch between a first position and a second position. In the first position, the outlet of the air duct formed between the duct wall and the volute faces an upwind opening so that the upwind opening becomes an air outlet. In the second position, the outlet of the air duct formed between the duct wall and the volute faces a downwind opening so that the downwind opening becomes an air outlet. The duct wall and the volute are separately configured.

[0008] In some embodiments, the rotary duct structure further includes a turntable, which is detachably connected to the axial end of the duct wall and the volute tongue, and the turntable is rotatably configured to drive the duct wall and the volute tongue to rotate together.

[0009] In some embodiments, the volute tongue includes a volute tongue body and a first fixing structure disposed at the axial end of the volute tongue body, the first fixing structure being engaged with the turntable via a first snap-fit ​​structure; and / or, the duct wall includes an duct wall body and a second fixing structure disposed at the axial end of the duct wall body, the second fixing structure being engaged with the turntable via a second snap-fit ​​structure.

[0010] In some embodiments, the first snap-fit ​​structure includes a first axial slot and / or a first radial slot; and / or, the second snap-fit ​​structure includes a second axial slot and / or a second radial slot.

[0011] In some embodiments, the turntable includes a turntable body and an arc-shaped ring disposed on the turntable body, the air duct wall and the volute tongue are connected to the arc-shaped ring, and the indoor unit of the air conditioner also includes a baffle ring, which is detachably connected to one side of the arc-shaped ring to be spliced ​​with the arc-shaped ring in the circumferential direction.

[0012] In some embodiments, the indoor unit of the air conditioner further includes a duct baffle rotatable relative to the casing. When the rotating duct structure is rotated to a first position, the duct baffle is configured to abut against the volute tongue; when the rotating duct structure is rotated to a second position, the duct baffle is configured to abut against the duct wall.

[0013] In some embodiments, the duct baffle has a pivot end and a free end, the duct baffle is configured to be rotatable about the pivot end, and the free end of the duct baffle is provided with an abutment groove.

[0014] In some embodiments, the indoor unit of the air conditioner also includes a heat exchanger, and the heat exchanger and the rotating air duct structure are arranged in the height direction.

[0015] In some embodiments, the indoor unit of the air conditioner further includes a water receiving tray disposed below the heat exchanger, and the heat exchanger has a V-shaped structure and includes a first heat exchanger section and a second heat exchanger section. The water receiving tray includes a first water receiving tray located below the first heat exchanger section and a second water receiving tray located below the second heat exchanger section. The duct baffle is rotatably connected to the first water receiving tray. When the rotating duct structure is rotated to the first position, the duct wall is configured to abut against the outer wall of the second water receiving tray.

[0016] In some embodiments, the indoor unit of the air conditioner further includes a heat exchanger and an electric heater. The heat exchanger has a V-shaped structure and includes a first heat exchanger section and a second heat exchanger section. The electric heater is disposed in the angled space formed by the first heat exchanger section and the second heat exchanger section.

[0017] A second aspect of this application provides an air conditioning system, including an outdoor unit and the aforementioned indoor unit.

[0018] The air conditioner indoor unit of this application embodiment features an upper air vent on the top plate and a lower air vent on the bottom plate. In cooling mode, air is discharged from the upper air vent to avoid direct cold air blowing on people and causing discomfort. In heating mode, air is discharged from the lower air vent, allowing hot air to reach the ground directly and quickly warm the room. Furthermore, the separate design of the duct wall and volute in this embodiment simplifies the mold manufacturing process for the duct wall and volute, effectively avoiding injection molding deformation problems caused by large integral molding dimensions. The separate design also improves the versatility and interchangeability of parts, facilitating after-sales maintenance and saving on maintenance costs.

[0019] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the internal structure of an air conditioner indoor unit when it is turned off, according to some embodiments of this application.

[0022] Figure 2 This is a schematic diagram of the internal structure of an air conditioner indoor unit in cooling mode according to some embodiments of this application.

[0023] Figure 3 This is a schematic diagram of the internal structure of an air conditioner indoor unit in heating mode according to some embodiments of this application.

[0024] Figure 4 This is a schematic diagram of the air duct assembly of an indoor air conditioning unit according to some embodiments of this application.

[0025] Figure 5 This is a structural schematic diagram of the air duct assembly of an air conditioning indoor unit according to some embodiments of this application from another angle.

[0026] Figure 6 This is an exploded structural diagram of the air duct assembly of an air conditioning indoor unit according to some embodiments of this application.

[0027] Figure 7 and Figure 8 They are respectively Figure 6 Schematic diagram of the structure of the cochlea at different angles.

[0028] Figure 9 and Figure 10 They are respectively Figure 6 Schematic diagrams of the stroke duct structure from different angles.

[0029] Figure 11 and Figure 12 They are respectively Figure 6 Schematic diagram of the turntable at different angles.

[0030] Figure 13 and 14 They are respectively Figure 6 Schematic diagram of the middle retaining ring at different angles.

[0031] Figure label:

[0032] 1. Housing; 11. Rear panel; 12. Top panel; 121. Upper air vent; 13. Bottom panel; 131. Lower air vent; 132. Limiting structure; 14. Front panel;

[0033] 2. Air duct components;

[0034] 21. Air duct structure;

[0035] 211. Duct wall; 2111. Duct wall body; 2112. Second fixing structure; 2112A. Second radial groove; 2112B. Second axial groove;

[0036] 212, volute tongue; 2121, volute tongue body; 2122, first fixing structure; 2122A, first radial groove; 2122B, first axial groove;

[0037] 213. Turntable; 2131. Turntable body; 2132. Arc-shaped ring; 2132A. Radial snap-fit; 2132B. Axial snap-fit; 2133. Central through hole; 2134. Retaining ring groove; 2135. First screw hole;

[0038] 215. Retaining ring; 2151. Retaining ring clip; 2152. Second screw hole;

[0039] 216. Screws;

[0040] 22. Crossflow fan blades;

[0041] 4. Heat exchanger;

[0042] 5. Air duct baffle;

[0043] 7. Electric heater;

[0044] 8. Water drip tray;

[0045] CI, cooling air inlet; CO, cooling air outlet; HI, heating air inlet; HO, heating air outlet;

[0046] X: length direction; Y: thickness direction; Z: height direction. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0049] For ease of description, spatial relative terms such as "above," "over," "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 "above" 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, and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] An air conditioner's indoor unit connects to the outdoor unit to regulate indoor air temperature by cooling or heating. The indoor unit includes a heat exchanger; in cooling mode, the heat exchanger acts as an evaporator, absorbing heat from the air to produce cooling; in heating mode, the heat exchanger acts as a condenser, releasing heat to the air to produce heating. Air conditioner indoor units are typically mounted on a wall, near the ceiling.

[0051] In related technologies, whether in heating or cooling mode, the indoor unit of an air conditioner blows air out through the air outlet located at the bottom of the casing. This makes it easy for cold air to blow directly on people in cooling mode, causing discomfort and potentially leading to air conditioning sickness if the cold air is blown directly on them for a long time.

[0052] To improve the above problems, this application proposes an indoor air conditioner unit, which includes an upper air vent at the top and a lower air vent at the bottom. By controlling the rotation of the air duct structure, the outlet of the air duct formed between the air duct wall and the volute tongue is directed towards the upper or lower air vent. In this way, when in cooling mode, the air is selected to be discharged from the upper air vent, thereby avoiding direct cold air blowing and improving the user's comfort.

[0053] The following is for reference. Figures 1 to 14 The structure and operation of the indoor unit of an air conditioner according to some embodiments of this application will be described in detail.

[0054] refer to Figures 1 to 3 The air conditioning indoor unit provided in some embodiments of this application includes a housing 1 and an air duct assembly 2. The housing 1 has an upper air outlet 121 located at the top and a lower air outlet 131 located at the bottom. The air duct assembly 2 includes a rotating air duct structure 21 and a cross-flow fan blade 22. The rotating air duct structure 21 includes an air duct wall 211 and a volute 212 for discharging air to the cross-flow fan blade 22. The rotating air duct structure 21 rotates to switch between a first position and a second position. In the first position, the outlet of the air duct formed between the air duct wall 211 and the volute 212 faces the upper air outlet 121 so that the upper air outlet 121 forms an air outlet. In the second position, the outlet of the air duct formed between the air duct wall 211 and the volute 212 faces the lower air outlet 131 so that the lower air outlet 131 forms an air outlet.

[0055] The air duct wall 211 and the volute tongue 212 are set separately.

[0056] refer to Figure 1 The housing 1 includes a rear panel 11, a top panel 12, a bottom panel 13, and a front panel 14. The top panel 12 and the bottom panel 13 are spaced apart in the height direction Z, and the rear panel 11 is positioned between the top panel 12 and the bottom panel 13. When the indoor unit is a wall-mounted unit, the rear panel 11 is positioned close to the wall, and the front panel 14 is positioned opposite the rear panel 11 and away from the wall. The top panel 12 has an upper air vent 121, and the bottom panel 13 has a lower air vent 131.

[0057] The indoor unit of the air conditioner has cooling and heating modes. In cooling mode, airflow enters the casing 1 from the bottom air inlet 131 and exits through the top air inlet 121. This means the overall airflow follows a bottom-in, top-out path, resulting in a longer flow path within the casing 1. This allows for more efficient heat exchange in the heat exchanger 4, leading to better cooling performance. Similarly, refer to... Figure 3In heating mode, airflow enters the casing 1 from the top air inlet 121 and exits through the bottom air inlet 131. The overall airflow follows a top-in, bottom-out path, resulting in a longer flow path within the casing 1. This allows for more efficient heat exchange with the heat exchanger 4, leading to better heating performance. Furthermore, the distance between the air inlet and outlet of the indoor unit in this embodiment is relatively large, thus preventing interference between the air intake and exhaust.

[0058] refer to Figure 2 and Figure 3 The air duct structure 21 includes an air duct wall 211 and a volute tongue 212. The positions of the air duct wall 211 and the volute tongue 212 are relatively fixed and rotate together. In the radial direction, one end between the air duct wall 211 and the volute tongue 212 forms an air inlet duct, and the other end forms an air outlet duct. In this embodiment of the air conditioner, the positions of the air inlet and air outlet of the indoor unit are different in cooling mode and heating mode. Therefore, in order to adapt to the changes in the air inlet and air outlet, the air duct structure 21 of this embodiment is configured to be rotatably arranged. This makes the position of the air inlet duct of the air duct structure 21 match the air inlet, and the position of the air outlet duct matches the air outlet, thereby making the airflow smoother, reducing wind resistance, and optimizing performance.

[0059] In this embodiment, the air duct wall 211 and the volute tongue 212 are separate parts, rather than integrally formed. In other words, the air duct wall 211 and the volute tongue 212 in this embodiment are independent parts.

[0060] The indoor unit of this air conditioner embodiment features an upper air vent 121 on the top plate 12 and a lower air vent 131 on the bottom plate 13. In cooling mode, air is discharged from the upper air vent 121 to avoid direct cold air blowing on the human body and causing discomfort. In heating mode, air is discharged from the lower air vent 131, allowing hot air to reach the ground directly and quickly warm the room. Furthermore, the separate design of the duct wall 211 and the volute tongue 212 in this embodiment simplifies the mold manufacturing process and effectively avoids injection molding deformation problems caused by the large size of a single-piece molding. The separate design also improves the versatility and interchangeability of parts, facilitating after-sales maintenance and saving on maintenance costs.

[0061] In some embodiments, the rotary air duct structure 21 further includes a turntable 213. The turntable 213 is detachably connected to the axial ends of the air duct wall 211 and the volute tongue 212. The turntable 213 is rotatably configured to drive the air duct wall 211 and the volute tongue 212 to rotate together.

[0062] refer to Figures 4 to 6In some embodiments, turntables 213 are respectively provided at both axial ends of the duct wall 211 and the volute tongue 212. The turntables 213 are rotatably arranged to drive the duct wall 211 and the volute tongue 212 to rotate together. By setting the turntables 213 to drive the duct wall 211 and the volute tongue 212 to rotate together, the various structures of the duct structure 21 are integrated, the structure is more compact, and the duct wall 211 and the volute tongue 212 can be relatively fixed, thereby ensuring the accuracy of their positions. Moreover, the duct wall 211 and the volute tongue 212 are detachably connected to the turntables 213, which makes it easy to disassemble and replace the duct wall 211 and the volute tongue 212 in case of failure.

[0063] In some embodiments, reference Figures 4 to 6 The turntable 213 includes a ring gear. The air duct assembly 2 also includes an internal gear meshing with the ring gear and a drive mechanism (e.g., a stepper motor). The internal gear is meshed inside the ring gear and configured to rotate under the drive of the drive mechanism to rotate the turntable 213. This integrates the drive of the turntable 213 at one end, and by providing the ring gear inside the turntable 213 and the internal gear inside the ring gear, the internal space of the turntable 213 is utilized to arrange the drive components, making the air duct structure 21 more compact.

[0064] refer to Figure 7 and Figure 8 In some embodiments, the volute tongue 212 includes a volute tongue body 2121 and a first fixing structure 2122 disposed at the axial end of the volute tongue body 2121. The first fixing structure 2122 is engaged with the turntable 213 via a first snap-fit ​​structure. The snap-fit ​​structure enables the engagement between the volute tongue 212 and the turntable 213, simplifying installation by requiring only accurate positioning and engagement without the need for other components. Similarly, disassembly simply involves disengaging the first snap-fit ​​structure.

[0065] Specifically, also refer to Figure 7 and Figure 8 In some embodiments, the first snap-fit ​​structure includes a first axial snap-fit ​​groove 2122B and a first radial snap-fit ​​groove 2122A. The groove depth of the first axial snap-fit ​​groove 2122B extends in the axial direction of the air duct assembly, and the groove depth of the first radial snap-fit ​​groove 2122A extends in the radial direction of the air duct assembly. In this embodiment, the first snap-fit ​​structure, through the axially extending first axial snap-fit ​​groove 2122B and the radially extending first radial snap-fit ​​groove 2122A, limits the volute tongue 212 in two directions, preventing the volute tongue 212 from disengaging from the turntable 213 and improving connection reliability.

[0066] refer to Figure 9 and Figure 10The duct wall 211 includes a duct wall body 2111 and a second fixing structure 2112 disposed at the axial end of the duct wall body 2111. The second fixing structure 2112 is engaged with the turntable 213 via a second snap-fit ​​structure. The snap-fit ​​structure enables the engagement between the duct wall 211 and the turntable 213, simplifying installation by requiring only accurate positioning and engagement without the need for additional components. Similarly, disassembly simply requires disengaging the first snap-fit ​​structure.

[0067] Refer again Figure 7 and Figure 8 The second snap-fit ​​structure includes a second axial snap-fit ​​groove 2112B and a second radial snap-fit ​​groove 2112A. In this embodiment, the second snap-fit ​​structure forms two-way limiting of the duct wall by the axially extending second axial snap-fit ​​groove 2112B and the radially extending second radial snap-fit ​​groove 2112A, preventing the duct wall 211 from disengaging from the turntable 213 and improving connection reliability.

[0068] In some embodiments, the turntable 213 includes a turntable body 2131 and an arcuate ring 2132 disposed on the turntable body 2131. The duct wall 211 and the volute tongue 212 are connected to the arcuate ring 2132. The indoor unit of the air conditioner also includes a retaining ring 215. The retaining ring 215 is detachably connected to one side of the arcuate ring 2132 to be circumferentially joined with the arcuate ring 2132.

[0069] This embodiment of the application provides a baffle ring that is spliced ​​with the arc-shaped ring 2132 to block the gap between the cross-flow fan blade and the turntable after installation, thereby reducing air leakage, improving the smoothness of the flow channel, and preventing airflow backflow. Moreover, the baffle ring 215 is detachable from the arc-shaped ring 2132, which facilitates the removal of the cross-flow fan blade.

[0070] In some embodiments, reference Figure 1 The indoor unit of the air conditioner also includes an air duct baffle 5 that is rotatable relative to the casing 1. (Reference) Figure 2 When the rotating air duct structure 21 is rotated to the first position, the air duct baffle 5 is configured to abut against the volute tongue 212. (Reference) Figure 3 When the rotating air duct structure 21 is rotated to the second position, the air duct baffle 5 is configured to abut against the air duct wall 211.

[0071] When the indoor unit of the air conditioner is in cooling mode, the rotating duct structure 21 rotates to the first position. At this time, the duct baffle 5 abuts against the volute tongue 212, and the duct baffle 5 forms the duct surface for cooling airflow CO. Specifically, the volute tongue 212 abuts against the abutment groove at the free end of the duct baffle 5, and the duct baffle 5 limits the rotational position of the volute tongue 212. At the same time, the volute tongue 212 abuts against the abutment groove and joins with the duct baffle 5 to form the duct surface, ensuring the sealing and integrity of the duct surface. When the indoor unit of the air conditioner is in heating mode, the duct baffle 5 rotates clockwise and abuts against the duct wall 211. At this time, the duct baffle 5 limits the rotational position of the duct wall 211.

[0072] In this embodiment, the duct baffle 5 is rotatable relative to the housing 1 and, in the first and second positions of the rotating duct structure 21, respectively, limits the rotational positions of the volute tongue 212 and the duct wall 211, thereby improving the accuracy of the rotational position of the rotating duct structure 21. Furthermore, the duct baffle 5 also forms the duct surface, ensuring the airtightness and integrity of the duct.

[0073] like Figure 9 and Figure 10 As shown, in some embodiments, the duct wall 211 is an arc-shaped plate. The duct wall 211 includes arc-shaped reinforcing ribs disposed on the outer wall surface and extending along the arcuate extension direction of the arc-shaped plate, and / or transverse reinforcing ribs disposed on the outer wall surface and extending along the width direction of the arc-shaped plate. The arc-shaped reinforcing ribs and the transverse reinforcing ribs strengthen the duct wall 211 from different directions, preventing deformation of the duct wall 211.

[0074] In some embodiments, the duct baffle 5 has a pivot end and a free end. The duct baffle 5 is configured to rotate about the pivot end, and the free end of the duct baffle 5 is provided with an abutment groove. The abutment groove not only limits the movement of the volute tongue 212, but also, when the volute tongue 212 abuts against the abutment groove, the wall surface of the volute tongue and the wall surface of the duct baffle 5 form a smooth surface, constituting a smooth duct surface and reducing the flow resistance of the airflow.

[0075] In some embodiments, the indoor unit of the air conditioner also includes a heat exchanger 4. The heat exchanger 4 and the rotating air duct structure 21 are arranged in the height direction Z. The arrangement of the heat exchanger 4 and the rotating air duct in the height direction Z can reduce the thickness of the indoor unit of the air conditioner.

[0076] Furthermore, the heat exchanger 4 has a V-shaped structure and is positioned above the rotating air duct structure 21. This allows the V-shaped space of the heat exchanger 4 to accommodate other components, thereby further improving the compactness of the indoor air conditioning unit.

[0077] In some embodiments, the indoor unit of the air conditioner further includes a water collection tray 8 disposed below the heat exchanger 4. The heat exchanger 4 has a V-shaped structure and includes a first heat exchanger section and a second heat exchanger section. The water collection tray 8 includes a first water collection tray located below the first heat exchanger section and a second water collection tray located below the second heat exchanger section. A duct baffle 5 is rotatably connected to the first water collection tray. When the rotating duct structure 21 is rotated to the first position, the duct wall 211 is configured to abut against the outer wall of the second water collection tray.

[0078] When the indoor unit of the air conditioner is running in cooling mode, the heat exchanger acts as an evaporator, and its surface temperature is low. When water vapor in the air encounters the condenser, it condenses into water droplets. These water droplets flow down the evaporator into the drip tray, preventing water from dripping directly onto the indoor floor or furniture, thus keeping the indoor environment clean and dry. In this embodiment, the duct baffle 5 is rotatably connected to the first drip tray, using the drip tray of the indoor unit as a base for rotation, eliminating the need for additional components specifically designed for the rotatable connection of the duct baffle 5, thus simplifying the structure of the indoor unit. Furthermore, the outer wall of the second drip tray forms a limiting structure for the duct wall 211, similarly eliminating the need for a dedicated limiting structure for the duct wall, further simplifying the structure of the indoor unit.

[0079] Specifically, the first end of the air duct wall 211 has a slope, which is sealed and fitted to the outer wall of the second water receiving tray.

[0080] In some embodiments, the indoor unit of the air conditioner further includes a heat exchanger 4 and an electric heater 7. The heat exchanger 4 has a V-shaped structure and includes a first heat exchanger section and a second heat exchanger section. The electric heater 7 is disposed within the included angle space formed by the first heat exchanger section and the second heat exchanger section.

[0081] In winter heating mode, the electric heater 7 can assist in heating and quickly raise the indoor temperature. When the indoor unit of the air conditioner is operating in heating mode in a low-temperature environment, the surface temperature of the heat exchanger is low, and moisture in the air is prone to condense into frost or even ice on its surface. The electric heater can appropriately increase the surface temperature of the heat exchanger, making the surface temperature higher than the dew point temperature, thus reducing the occurrence of frost or ice.

[0082] Some embodiments of this application also provide an air conditioning system, including an outdoor unit and an indoor unit.

[0083] The following is based on Figures 1 to 14 The structure and operation of an air conditioner indoor unit according to a specific embodiment of this application will be described in detail.

[0084] like Figure 1 As shown, the indoor unit of the air conditioner in this embodiment includes a casing 1, an air duct assembly 2 disposed in the casing 1, a heat exchanger 4, an air duct baffle 5, an electric heater 7, and a water collection tray 8.

[0085] The housing 1 includes a rear panel 11, a top panel 12, a bottom panel 13, and a front panel 14. The length direction X, thickness direction Y, and height direction Z of the housing 1 are perpendicular to each other.

[0086] The axial direction of the air duct assembly 2 is approximately parallel to the length direction X of the housing 1.

[0087] like Figure 1 As shown, an upper air vent 121 is provided on the top plate 12, and a lower air vent 131 is provided on the bottom plate 13. The air duct assembly 2 includes a rotating air duct structure 21 and a cross-flow fan blade 22. The rotating air duct structure 21 includes an air duct wall 211 and a volute tongue 212. The rotating air duct structure 21 is rotatably arranged. Specifically, the rotation axis of the rotating air duct structure 21 extends along the length direction X of the casing 1. This allows the outlet of the air duct formed between the air duct wall 211 and the volute tongue 212 of the rotating air duct structure 21 to face either the upper air vent 121 or the lower air vent 131. This allows air to be discharged from different air vents in cooling mode and heating mode, thereby improving comfort.

[0088] exist Figure 2 In the cooling mode shown, airflow enters from the lower vent 131 and exits from the upper vent 121. Specifically, airflow enters the cooling inlet duct CI from the bottom, flows through the duct structure 21 to the cooling outlet duct CO, and exits through the upper vent 121, thus preventing cold air from blowing directly on the human body. Figure 3 In the heating mode shown, airflow enters from the upper vent 121 and exits from the lower vent 131. Specifically, airflow enters the heating air inlet HI from the top, flows out through the air duct structure 21 to the heating air outlet HO, and exits through the lower vent 131. This allows hot air to be blown directly to the ground through the lower vent, accelerating heating.

[0089] In this embodiment, when the indoor unit of the air conditioner switches between cooling mode and heating mode, both its air inlet and air outlet switch. In cooling mode, the lower air outlet 131 becomes the air inlet and the upper air outlet 121 becomes the air outlet; in heating mode, the upper air outlet 121 becomes the air inlet and the lower air outlet 131 becomes the air outlet.

[0090] For example Figure 2 and Figure 3 In this embodiment, when the indoor unit of the air conditioner switches between cooling and heating modes, the rotating air duct structure 21 is in different positions so that the outlet of the air duct faces either the upper air vent or the lower air vent, respectively. Specifically, as shown... Figure 2 As shown, when the indoor unit of the air conditioner is in cooling mode, the rotating air duct structure 21 is in the first position. At this time, the outlet of the air duct of the rotating air duct structure 21 faces the cooling air outlet CO, thus causing the cooling airflow to be blown out from the upper air outlet 121. Figure 3As shown, when the indoor unit of the air conditioner is in heating mode, the rotating air duct structure 21 is in the second position. At this time, the outlet of the air duct of the rotating air duct structure 21 faces the heating air duct HO, so that the heating airflow is blown out from the lower air outlet 131.

[0091] like Figures 4 to 6 As shown, the rotating air duct structure 21 includes an air duct wall 211, a volute tongue 212, a turntable 213, a retaining ring 215, and screws 216.

[0092] Among them, such as Figure 4 and Figure 5 As shown, the axial ends of the duct wall 211 and the volute tongue 212 are respectively connected to two turntables 213. A central through hole 2133 is provided on the turntable 213, and the drive shaft of the drive mechanism (e.g., drive motor) passes through the central through hole 2133 to drive the cross-flow fan blades to rotate.

[0093] The rotating air duct structure 21 has a first position and a second position during rotation. The rotating air duct structure 21 is located in the middle of the housing, and the air duct surface includes a volute tongue and an air duct wall, which are connected and fixed by turntables 213 at both ends. This allows the volute tongue 212 and the air duct wall 211 to rotate together to the corresponding working position, and their relative positions can remain unchanged.

[0094] Furthermore, in this embodiment, the air duct wall 211 and the volute tongue 212 are separately configured, making them independent parts. Different molds can be used during manufacturing, thereby simplifying the mold structure and reducing manufacturing difficulty. Moreover, since the air duct wall 211 and the volute tongue 212 are independent parts, the injection molding deformation problem caused by the large size of a one-piece molding can be avoided, and they can be replaced independently during after-sales maintenance, saving after-sales costs.

[0095] In this embodiment, the air duct wall 211 and the volute tongue 212 are detachably connected to the turntable 213, which makes it easy to disassemble and replace when a single part needs maintenance, further reducing after-sales costs.

[0096] Specifically, such as Figure 7 and Figure 8 As shown, the volute tongue 212 includes a volute tongue body 2121 and two first fixing structures 2122 respectively disposed at both axial ends of the volute tongue body 2121. The first fixing structure 2122 includes a first radial groove 2122A and a first axial groove 2122B. Specifically, the first fixing structure 2122 is a bent structure comprising a first part and a second part. The first part is connected to the end of the volute tongue body 2121, and the second part is disposed at the end of the first part and approximately perpendicular to the first part. The first axial groove 2122B is disposed on the first part, and the first radial groove 2122A is disposed on the second part.

[0097] like Figure 11 and Figure 12 As shown, the turntable 213 includes a turntable body 2131 and an arc-shaped ring 2132 disposed on the turntable body 2131. The arc-shaped ring 2132 is disposed on the end face of the turntable body 2131 near the volute tongue 212, and a plurality of spaced axial buckles 2132B are provided on the axial end face of the arc-shaped ring 2132, and a plurality of spaced radial buckles 2132A are provided on the radial edge of the arc-shaped ring 2132. When the volute tongue 212 is connected to the turntable 213, the bending structure of the first fixing structure 2122 is engaged with the arc-shaped ring 2132, thereby causing the first axial groove 2122B of the volute tongue 212 to engage with the axial buckles 2132B on the arc-shaped ring 2132, and the first radial groove 2122A of the volute tongue 212 to engage with the radial buckles 2132A on the arc-shaped ring 2132.

[0098] like Figure 9 and Figure 10 As shown, the duct wall 211 includes a duct wall body 2111 and a second fixing structure 2112 disposed at the axial end of the duct wall body 2111. The second fixing structure 2112 is also a bent structure, and includes a second radial groove 2112A and a second axial groove 2112B. When the duct wall 211 is connected to the turntable 213, the bent structure of the second fixing structure 2112 is fastened to the arc ring 2132, thereby causing the second axial groove 2112B of the duct wall 211 to engage with the axial buckle 2132B on the arc ring 2132, and the second radial groove 2112A of the duct wall 211 to engage with the radial buckle 2132A on the arc ring 2132.

[0099] The retaining ring 215 is detachably connected to one side of the arc-shaped ring 2132. Specifically, the second screw hole 2152 of the retaining ring 215 and the first screw hole 2135 of the arc-shaped ring 2132 are detachably connected by screws 216. The turntable body 2131 is provided with a retaining ring groove 2134, and the retaining ring buckle 2151 provided on the retaining ring 215 is engaged in the retaining ring groove 2134.

[0100] The baffle ring 215 is arc-shaped and is located on one side of the arc-shaped ring 2132 to block the gap between the cross-flow fan blade and the turntable after installation, reducing air leakage, improving the smoothness of the flow channel, and preventing airflow backflow. Moreover, the baffle ring 215 is detachable from the arc-shaped ring 2132, which facilitates the removal of the cross-flow fan blade.

[0101] like Figure 1As shown, in this embodiment, the heat exchanger 4 and the air duct assembly 2 are arranged vertically in the height direction Z within the casing 1. Specifically, the heat exchanger 4 is positioned above the air duct assembly 2. This allows the thickness of the indoor unit of the air conditioner in this embodiment, i.e., the dimension in the thickness direction Y, to be set smaller, thus reducing the thickness of the indoor unit. Furthermore, the vertical arrangement of the heat exchanger 4 and the air duct assembly 2 ensures that the airflow exiting the air duct assembly 2 can essentially receive heat exchange from the heat exchanger 4, or in other words, the airflow that has undergone heat exchange with the heat exchanger 4 can essentially pass through the air duct assembly 2 and exit.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. An air conditioner indoor unit characterized by comprising: include: The housing (1) has an upper air vent (121) at the top and a lower air vent (131) at the bottom; and A duct assembly (2) includes a rotating duct structure (21) and a cross-flow fan blade (22). The rotating duct structure (21) includes a duct wall (211) and a volute (212) for discharging air to the cross-flow fan blade (22). The rotating duct structure (21) rotates to switch between a first position and a second position. In the first position, the outlet of the air duct formed between the duct wall (211) and the volute (212) faces the upper air outlet (121) so that the upper air outlet (121) forms an air outlet. In the second position, the outlet of the air duct formed between the duct wall (211) and the volute (212) faces the lower air outlet (131) so that the lower air outlet (131) forms an air outlet. The air duct wall (211) and the volute tongue (212) are separately configured. 2.The indoor unit of the air conditioner according to claim 1, characterized by, The rotating air duct structure (21) further includes a turntable (213), which is detachably connected to the axial ends of the air duct wall (211) and the volute tongue (212), and the turntable (213) is rotatably arranged to drive the air duct wall (211) and the volute tongue (212) to rotate together. 3.The indoor unit of the air conditioner according to claim 2, characterized by, The volute tongue (212) includes a volute tongue body (2121) and a first fixing structure (2122) disposed at the axial end of the volute tongue body (2121), the first fixing structure (2122) being engaged with the turntable (213) by a first snap-fit ​​structure; and / or, the air duct wall (211) includes an air duct wall body (2111) and a second fixing structure (2112) disposed at the axial end of the air duct wall body (2111), the second fixing structure (2112) being engaged with the turntable (213) by a second snap-fit ​​structure. 4.The indoor unit of the air conditioner according to claim 3, characterized by, The first snap-fit ​​structure includes a first axial snap-fit ​​groove (2122B) and / or a first radial snap-fit ​​groove (2122A); and / or the second snap-fit ​​structure includes a second axial snap-fit ​​groove (2112B) and / or a second radial snap-fit ​​groove (2112A). 5.The indoor unit of the air conditioner according to claim 2, characterized in that, The turntable (213) includes a turntable body (2131) and an arc-shaped ring (2132) disposed on the turntable body (2131). The air duct wall (211) and the volute tongue (212) are connected to the arc-shaped ring (2132). The indoor unit of the air conditioner also includes a baffle ring (215), which is detachably connected to one side of the arc-shaped ring (2132) to be spliced ​​with the arc-shaped ring (2132) in the circumferential direction. 6.The air conditioning indoor unit according to any one of claims 1 to 5, characterized by, The indoor unit of the air conditioner also includes a duct baffle (5) that is rotatable relative to the housing (1). When the rotating duct structure (21) is rotated to the first position, the duct baffle (5) is configured to abut against the volute tongue (212); when the rotating duct structure (21) is rotated to the second position, the duct baffle (5) is configured to abut against the duct wall (211). 7.The indoor unit of the air conditioner according to claim 6, characterized in that, The air duct baffle (5) has a pivot end and a free end. The air duct baffle (5) is configured to rotate about the pivot end. The free end of the air duct baffle (5) is provided with an abutment groove. 8.The indoor unit of the air conditioner according to claim 6, characterized in that, The indoor unit of the air conditioner also includes a heat exchanger (4), and the heat exchanger (4) and the rotating air duct structure (21) are arranged in the height direction (Z). 9.The indoor unit of the air conditioner according to claim 8, characterized by, The indoor unit of the air conditioner also includes a water receiving tray (8) disposed below the heat exchanger (4), and the heat exchanger (4) has a V-shaped structure and includes a first heat exchanger section and a second heat exchanger section. The water receiving tray (8) includes a first water receiving tray located below the first heat exchanger section and a second water receiving tray located below the second heat exchanger section. The air duct baffle (5) is rotatably connected to the first water receiving tray. When the rotating air duct structure (21) is rotated to the first position, the air duct wall (211) is configured to abut against the outer wall of the second water receiving tray. 10.The indoor unit of the air conditioner according to any one of claims 1 to 5, characterized by, The indoor unit of the air conditioner also includes a heat exchanger (4) and an electric heater (7). The heat exchanger (4) has a V-shaped structure and includes a first heat exchanger section and a second heat exchanger section. The electric heater (7) is disposed in the space between the first heat exchanger section and the second heat exchanger section.

11. An air conditioning system, characterised in that, It includes an outdoor air conditioning unit and an indoor air conditioning unit as described in any one of claims 1 to 10.

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