Indoor unit and air conditioner

Abstract

The present application provides an indoor unit and an air conditioner. The indoor unit comprises a volute air duct (1), a crossflow fan blade (2) and a first heat exchanger (3). The volute air duct (1) comprises an air inlet (4) and a first air outlet (5). The crossflow fan blade (2) is rotatably arranged in the volute air duct (1). The first heat exchanger (3) is arranged on the radial inner side of the crossflow fan blade (2). The air flow entering from the air inlet (4) flows to the first air outlet (5) through the first heat exchanger (3). According to the indoor unit of the present application, the arrangement of the air duct outlet is not restricted, which can effectively improve the air outlet efficiency and heat exchange performance of the indoor unit.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an indoor unit and an air conditioner. Background Art

[0002] Currently, most split-type air conditioners utilize a top-mounted heat exchanger, a middle-mounted crossflow fan, and a lower-mounted air duct. For split-type air conditioners, the placement of the air duct outlet is constrained by the heat exchanger's structural layout, which in turn is limited by the unit's condensate collection system and other structural constraints. Consequently, the heat exchanger's structural layout is limited. To ensure optimal heat transfer, the optimal inlet and outlet airflow direction is determined once the heat exchanger's structure is determined. Changing the inlet and outlet positions of the crossflow fan will negatively impact the heat exchange efficiency of the heat exchanger, negatively impacting the unit's airflow efficiency and heat transfer performance. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present application is to provide an indoor unit and an air conditioner so that the inlet and outlet directions of the cross-flow fan blades can be set more flexibly, thereby effectively improving the air outlet efficiency and heat exchange performance of the indoor unit.

[0004] In order to solve the above problems, the present application provides an indoor unit, including a volute air duct, a cross-flow fan blade and a first heat exchanger. The volute air duct includes an air inlet and a first air outlet. The cross-flow fan blade can be rotatably arranged in the volute air duct. The first heat exchanger is arranged on the radial inner side of the cross-flow fan blade. The air flow entering from the air inlet flows to the first air outlet through the first heat exchanger.

[0005] Preferably, the indoor unit includes a base, a first bracket is provided at the first end of the base, a second bracket is provided at the second end of the base, the first end of the volute air duct is mounted on the first bracket, the second end of the volute air duct is mounted on the second bracket, the first end of the crossflow blade is mounted on the first bracket, the second end of the crossflow blade is mounted on the second bracket, and the second end of the first heat exchanger is mounted on the second bracket.

[0006] Preferably, the volute air duct is fixedly mounted on the first bracket and the second bracket, and the first end of the first heat exchanger is fixedly disposed on the volute air duct or the first bracket.

[0007] Preferably, the volute air duct is rotatably mounted on the first bracket and the second bracket, and the first end of the first heat exchanger is suspended.

[0008] Preferably, the first bracket includes a motor cavity, in which a first motor is disposed. The first motor is drivingly connected to the first end of the crossflow blade.

[0009] Preferably, a convex shaft is provided at one end of the first bracket facing the volute air duct, a supporting bearing is provided on the outer sleeve of the convex shaft, and the first end of the volute air duct is mounted on the supporting bearing.

[0010] Preferably, a bearing chamber is provided on the first end cover of the volute air duct, and the supporting bearing is installed in the bearing chamber.

[0011] Preferably, an air duct driving wheel is mounted on the second bracket, the air duct driving wheel is rotatable relative to the second bracket, and the volute air duct is mounted on the air duct driving wheel.

[0012] Preferably, the air duct driving wheel has a center hole, the first heat exchanger has inlet and outlet pipes, the inlet and outlet pipes pass through the center hole, an inner ring gear is provided on the inner circumferential wall of the center hole, a second motor and a driving gear are provided on the second bracket, the driving gear is provided at the output end of the second motor, and the driving gear is engaged with the inner ring gear.

[0013] Preferably, the second bracket includes an outer ring wall, and a plurality of sleeves are circumferentially arranged on one end of the duct driving wheel facing the second bracket. The sleeves are located on the same circumference, and the plurality of sleeves are located on the inner side of the outer ring wall and rollingly engage with the inner circumferential wall of the outer ring wall.

[0014] Preferably, the second bracket includes an outer ring wall and a mounting plate, the mounting plate includes a protrusion protruding toward the air duct driving wheel, an annular groove is formed between the protrusion and the outer ring wall, and the air duct driving wheel is provided with multiple sleeves along the circumferential direction at one end facing the second bracket, the sleeves are located on the same circumference, and the multiple sleeves can be rolled in the annular groove.

[0015] Preferably, the second motor is mounted on the projection.

[0016] Preferably, a rolling bracket is installed on the second bracket, a roller is provided on the rolling bracket, an end ring is provided at the second end of the crossflow blade, the roller supports the end ring and rotates with the end ring.

[0017] Preferably, the rolling bracket is provided with a first support and a second support, and the first support and the second support are both provided with rollers. The roller on the first support is located on the outer periphery of the end ring, and the roller on the second support is located on the inner periphery of the end ring.

[0018] Preferably, an annular groove is provided on the outer peripheral wall of the end ring, and the roller on the first support is located in the annular groove; and / or an annular groove is provided on the inner peripheral wall of the end ring, and the roller on the second support is located in the annular groove.

[0019] Preferably, there is one first support and two second supports, and in a section perpendicular to the rotation axis of the crossflow blade, the rollers on the two second supports are symmetrical about the line connecting the center of the roller on the first support and the rotation axis.

[0020] Preferably, a central hole is provided on the rolling bracket, the second end of the first heat exchanger is engaged with the rolling bracket, and the second end of the first heat exchanger is provided with inlet and outlet pipelines, which pass through the central hole.

[0021] Preferably, a cantilever frame is provided between the rolling support and the first heat exchanger, a first end of the cantilever frame is fixedly connected to the first end of the first heat exchanger, and a second end of the cantilever frame is fixedly connected to the rolling support.

[0022] Preferably, the cantilever frame is provided with a folded edge, and the folded edge is located between the first heat exchanger and the rolling bracket.

[0023] Preferably, the folded edge is formed by punching the cantilever frame.

[0024] Preferably, a first sleeve is provided on the rolling bracket, and a second sleeve is provided on the second bracket. The first sleeve and the second sleeve are sleeved together, and an anti-rotation fit is formed between the first sleeve and the second sleeve.

[0025] Preferably, a protrusion is provided on the outer periphery of the first sleeve, and a slot is provided on the inner periphery of the second sleeve, and the protrusion is inserted into the slot.

[0026] Preferably, a water receiving tray is provided at the bottom of the first heat exchanger, a drainage hole is provided on the water receiving tray, and a drainage pipe is connected to the drainage hole.

[0027] Preferably, an auxiliary air duct is provided on the base, and the auxiliary air duct includes a second air outlet. When the volute air duct rotates to the base position, the first air outlet of the volute air duct is connected to the inlet of the auxiliary air duct, and the indoor unit discharges air from the second air outlet of the auxiliary air duct.

[0028] Preferably, a wind sweeping blade, a wind guide plate or a breeze sensing component is provided at the second air outlet.

[0029] Preferably, a plasma generator is provided at the second air outlet.

[0030] Preferably, a heat insulation layer is provided on the inner wall of the volute air duct.

[0031] According to another aspect of the present application, an air conditioner is provided, including an indoor unit, which is the indoor unit described above.

[0032] Preferably, the air conditioner is a desktop air conditioner, and when the indoor unit includes a base, the distance between the base and the central axis of the volute air duct is greater than the maximum rotation radius of the volute air duct.

[0033] Preferably, the air conditioner is a mobile air conditioner, and when the indoor unit includes a base, a compressor, a throttling device and a second heat exchanger are integrated in the base, and the compressor, the second heat exchanger, the throttling device and the first heat exchanger are connected in sequence to form a refrigerant flow cycle.

[0034] The indoor unit provided by the present application includes a volute duct, a crossflow fan blade and a first heat exchanger, the volute duct includes an air inlet and a first air outlet, the crossflow fan blade can be rotatably arranged in the volute duct, the first heat exchanger is arranged on the radial inner side of the crossflow fan blade, and the air flow entering from the air inlet flows to the first air outlet through the first heat exchanger. Since the first heat exchanger is arranged on the radial inner side of the crossflow fan blade, during the operation of the crossflow fan blade, no matter how the air outlet of the volute duct is arranged, a good matching relationship can be formed between the volute duct and the first heat exchanger, ensuring that the air flow can be fully exchanged with the first heat exchanger from the air inlet and then blown out from the first air outlet. Therefore, the air outlet setting of the volute duct is not restricted and can be arbitrarily set to a desired state, so that the design range of the inlet and outlet directions of the crossflow fan blade is wider, the setting of the volute duct is more flexible, and can better meet the design requirements, which can effectively improve the air outlet efficiency and heat exchange performance of the indoor unit and improve the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the exploded structure of the indoor unit according to an embodiment of the present application;

[0036] Figures 2 to 6 This is a schematic structural diagram of the indoor unit of an embodiment of the present application at different air sweeping angles;

[0037] Figure 7 This is a side structural diagram of the indoor unit according to an embodiment of the present application;

[0038] Figure 8 for Figure 7 BB cross-sectional structural diagram;

[0039] Figure 9 for Figure 8 Decomposition structure diagram;

[0040] Figure 10 A partial cross-sectional view of an indoor unit according to an embodiment of the present application;

[0041] Figure 11 This is a partial sectional exploded view of the indoor unit of an embodiment of the present application;

[0042] Figure 12 This is a three-dimensional cross-sectional structural diagram of the indoor unit according to an embodiment of the present application;

[0043] Figure 13 A three-dimensional structural diagram of a rolling bracket of an indoor unit according to an embodiment of the present application;

[0044] Figure 14 This is a schematic structural diagram of a rolling bracket of an indoor unit according to an embodiment of the present application;

[0045] Figure 15 A side structural diagram of a rolling bracket of an indoor unit according to an embodiment of the present application;

[0046] Figure 16 Schematic diagram of the coordination structure of the cross-flow fan and the rolling bracket of the indoor unit of the embodiment of the present application;

[0047] Figure 17 This is a schematic diagram of the coordination structure between the rolling bracket and the heat exchanger of the indoor unit of an embodiment of the present application;

[0048] Figure 18 This is a cross-sectional view of the matching structure of the rolling bracket and the heat exchanger of the indoor unit of an embodiment of the present application;

[0049] Figure 19 This is a three-dimensional structural diagram of an indoor unit according to an embodiment of the present application;

[0050] Figure 20 This is a three-dimensional structural diagram of an indoor unit according to an embodiment of the present application;

[0051] Figure 21 This is a three-dimensional structural diagram of an indoor unit according to an embodiment of the present application.

[0052] The reference numerals indicate:

[0053] 1. Volute air duct; 2. Crossflow fan blade; 3. First heat exchanger; 4. Air inlet; 5. First air outlet; 6. Base; 7. First bracket; 8. Second bracket; 9. First motor; 10. Protruding shaft; 11. Support bearing; 12. Bearing chamber; 13. Air duct drive wheel; 14. Inlet and outlet pipes; 15. Internal gear ring; 16. Second motor; 17. Drive gear; 18. Outer ring wall; 19. Mounting plate; 20. Bushing; 21. Protrusion; 22. Annular groove; 23. Rolling bracket; 24. End ring; 25. Roller; 26. First support; 27. Second support; 28. Annular groove; 29. ​​Cantilever frame; 30. Folding edge; 31. First sleeve; 32. Second sleeve; 33. Bump; 34. Water tray; 35. Drain pipe; 36. Auxiliary air duct; 37. Second air outlet; 38. Wind sweeping blade; 39. Plasma generator; 40. First end cover; 41. Second end cover; 42. Travel wheel. DETAILED DESCRIPTION

[0054] See also Figures 1 to 21 As shown, according to an embodiment of the present application, the indoor unit includes a volute air duct 1, a crossflow fan blade 2 and a first heat exchanger 3, the volute air duct 1 includes an air inlet 4 and a first air outlet 5, the crossflow fan blade 2 can be rotatably arranged in the volute air duct 1, and the first heat exchanger 3 is arranged on the radial inner side of the crossflow fan blade 2, and the air flow entering from the air inlet 4 flows to the first air outlet 5 through the first heat exchanger 3.

[0055] Since the first heat exchanger 3 is arranged on the radial inner side of the cross-flow fan blade 2, during the operation of the cross-flow fan blade 2, no matter how the air outlet of the volute air duct 1 is set, a good matching relationship can be formed between the volute air duct 1 and the first heat exchanger 3, ensuring that the air flow can be fully blown out from the first air outlet 5 after fully exchanging heat with the first heat exchanger 3 from the air inlet 4. Therefore, the design range of the air inlet and outlet directions of the cross-flow fan blade 2 is wider, and the air outlet setting of the volute air duct 1 is not restricted and can be set to the required state at will, making the setting of the volute air duct 1 more flexible, which can better meet the design requirements, effectively improve the air outlet efficiency and heat exchange performance of the indoor unit, and improve the user's comfort.

[0056] The evaporator of an ordinary air conditioner is usually fixed to the volute air duct. Since the split wall-mounted evaporator must have inlet and outlet copper pipes, these two copper pipes need to be connected to the external unit and cannot be made into moving parts. Therefore, the evaporator needs to be a fixed component. If the traditional design of arranging the evaporator above the volute air duct is still followed, first, when designing the fixed volute air duct 1, it will restrict the design of the first air outlet 5 of the volute air duct 1, which is not conducive to the flexible design of the first air outlet 5. Second, it will hinder the rotation of the volute air duct 1, which is not conducive to the design of a rotatable volute air duct. Third, during the rotation of the air duct, it cannot be guaranteed that every position has good air inlet heat exchange performance. Therefore, in this application, the evaporator is redesigned, its split-row design is cancelled, the evaporator is changed to an elliptical integrated type, and is placed inside the cylinder of the cross-flow fan blade 2. When the volute air duct 1 is designed as a rotatable air duct structure, the rotation of the volute air duct 1 will not affect the heat exchange of the evaporator due to the change of the air inlet position, and the evaporator has a relatively fixed position, which is convenient for the structural design of the volute air duct.

[0057] The indoor unit includes a base 6, a first bracket 7 being provided at a first end of the base 6, and a second bracket 8 being provided at a second end of the base 6. The first end of the volute duct 1 is mounted on the first bracket 7, and the second end of the volute duct 1 is mounted on the second bracket 8. The first end of the crossflow blade 2 is mounted on the first bracket 7, and the second end of the crossflow blade 2 is mounted on the second bracket 8. The second end of the first heat exchanger 3 is mounted on the second bracket 8. Providing the first bracket 7 and the second bracket 8 on the base 6 facilitates support and installation of the volute duct 1, the crossflow blade 2, and the first heat exchanger 3.

[0058] In one embodiment, the volute duct 1 is fixedly mounted on the first bracket 7 and the second bracket 8, and the first end of the first heat exchanger 3 is fixedly mounted on the volute duct 1 or the first bracket 7. In this embodiment, the first heat exchanger 3 is built into the cross-flow blade 2, and the volute duct 1 and the first heat exchanger 3 are both fixedly mounted on the base 6. Since the first heat exchanger 3 is built into the inner side of the cross-flow blade 2, it will not have any impact on the air outlet setting of the volute duct 1. Regardless of the direction in which the air outlet of the volute duct 1 is set, it can ensure that the airflow and the first heat exchanger 3 are fully exchanged with each other. Therefore, the air outlet of the volute duct 1 can be arbitrarily set as needed, and the setting position is more flexible, which can better meet the design requirements.

[0059] In one embodiment, the volute air duct 1 can be rotatably mounted on the first bracket 7 and the second bracket 8, and the first end of the first heat exchanger 3 is suspended, so that there is no connection between the first heat exchanger 3 and the first bracket 7, thereby avoiding the first end of the first heat exchanger 3 from affecting the structure of the first bracket 7, thereby facilitating the rotational coordination between the volute air duct 1 and the cross-flow fan blades 2 and the first bracket 7, and reducing the difficulty of coordination between the volute air duct 1 and the cross-flow fan blades 2 and the first bracket 7.

[0060] The first bracket 7 includes a motor cavity, within which a first motor 9 is disposed. The first motor 9 is drivingly connected to the first end of the crossflow blade 2. A keyed connection is employed between the first motor 9 and the first end of the crossflow blade 2, enabling the first motor 9 to conveniently drive the crossflow blade 2 in rotation. A first end cap 40 is disposed on the opening of the motor cavity to seal the opening, thereby protecting the first motor 9 within the cavity and preventing damage from moisture or impurities.

[0061] A protruding shaft 10 is provided on the end of the first bracket 7 facing the volute air duct 1. A support bearing 11 is provided on the outer sleeve of the protruding shaft 10, and the first end of the volute air duct 1 is mounted on the support bearing 11. The provision of the protruding shaft 10 increases the number of mounting structures for the support bearing 11, facilitating its installation and fixation. A through-hole is provided in the protruding shaft 10, through which the motor shaft of the first motor 9 passes to drively connect with the crossflow blades 2. Therefore, the protruding shaft 10 does not obstruct the connection between the first motor 9 and the crossflow blades 2. Since the convex shaft 10 is sleeved outside the motor shaft of the first motor 9, and the volute air duct 1 is sleeved outside the cross-flow fan blade 2, the combined rotating structure of the supporting bearing 11 sleeved outside the convex shaft 10 and the volute air duct 1 will not interfere with the combined rotating structure of the first motor 9 and the cross-flow fan blade 2. The two can rotate independently of each other, thereby realizing independent control of the rotation of the cross-flow fan blade 2 and the volute air duct 1, so that the rotation of the volute air duct 1 will not have an adverse effect on the rotation of the cross-flow fan blade 2, thereby facilitating the rotation of the volute air duct 1 to supply air, and realizing the adjustment of the air outlet direction of the volute air duct 1.

[0062] In this embodiment, the volute duct 1 is a movable component, allowing air to be swept directly from the volute duct 1, thus eliminating the need for a wind deflector. Furthermore, since the first heat exchanger 3 is located inside the crossflow impeller 2, it does not hinder the rotation of the volute duct 1. This allows for wide-angle sweeping of the volute duct, enabling sweeping not only within 270 degrees but also at angles of 270 degrees and above. This significantly increases the indoor unit's sweeping angle and enables rapid indoor cooling through wide-area sweeping.

[0063] A bearing chamber 12 is provided on the first end cover of the volute air duct 1, and the supporting bearing 11 is installed in the bearing chamber 12, which can further optimize the structure of the volute air duct 1, reduce the overall axial length of the indoor unit, and make the overall structure of the indoor unit more compact. At the same time, the bearing chamber 12 formed by the volute air duct 1 can also be used to fix the outer ring of the supporting bearing 11, so as to achieve stable cooperation between the supporting bearing 11 and the volute air duct 1, so that the first end of the volute air duct 1 and the base 6 are stably fixed, and at the same time have good rotation performance.

[0064] A duct drive wheel 13 is mounted on the second bracket 8 and is rotatable relative to the second bracket 8. The volute duct 1 is mounted on the duct drive wheel 13. The duct drive wheel 13 and the volute duct 1 form a synchronous rotational coordination relationship. The duct drive wheel 13 and the volute duct 1 can be fixedly connected together or connected by a key to achieve synchronous rotational drive. The addition of the duct drive wheel 13 facilitates the rotational coordination between the volute duct 1 and the second bracket 8, reducing the difficulty of setting up the volute duct 1.

[0065] The air duct drive wheel 13 has a center hole, and the first heat exchanger 3 has an inlet and outlet pipe 14, which passes through the center hole. An inner gear ring 15 is provided on the inner peripheral wall of the center hole. A second motor 16 and a drive gear 17 are provided on the second bracket 8. The drive gear 17 is provided at the output end of the second motor 16, and the drive gear 17 is engaged with the inner gear ring 15. The center hole on the air duct drive wheel 13 can form an avoidance structure, so that the inlet and outlet pipes 14 of the first heat exchanger 3 can smoothly pass through the outside of the volute air duct 1 without affecting the rotation function of the air duct drive wheel 13. At the same time, the inner gear ring 15 on the air duct drive wheel 13 can form a drive connection with the second motor 16 and the drive gear 17, so that the second motor 16 can be used to conveniently drive the volute air duct 1.

[0066] Since the design size of the inner gear ring 15 is relatively flexible, the position of the second motor 16 can be easily set, and the second motor 16 can be deviated from the center position of the second bracket 8, so as to avoid the setting of the second motor 16 causing obstruction to the pipe routing of the inlet and outlet pipes 14, and at the same time will not affect the rotation driving function of the second motor 16 for the volute air duct 1.

[0067] In one embodiment, the second bracket 8 includes an outer annular wall 18, and a plurality of bushings 20 are circumferentially provided on one end of the duct drive wheel 13 facing the second bracket 8. The bushings 20 are located on the same circumference, are located on the inner side of the outer annular wall 18, and are in rolling engagement with the inner circumferential wall of the outer annular wall 18. In this embodiment, the plurality of bushings 20 cooperate with each other to not only support the duct drive wheel 13, allowing the duct drive wheel 13 to always remain coaxial with the rotation axis of the volute duct 1, but also guide the rotation of the duct drive wheel 13, thereby reducing the rotational resistance of the duct drive wheel 13.

[0068] In this embodiment, the second end of the volute air duct 1 is fixed to the air duct driving wheel 13 to form a whole. The air duct driving wheel 13 is provided with three bosses, and the shaft sleeve 20 is mounted on the bosses. The shaft sleeve 20 is, for example, a POM shaft sleeve.

[0069] The second bracket 8 includes an outer ring wall 18 and a mounting plate 19. The mounting plate 19 includes a protrusion 21 protruding toward the air duct drive wheel 13. An annular groove 22 is formed between the protrusion 21 and the outer ring wall 18. The air duct drive wheel 13 is circumferentially provided with a plurality of sleeves 20 at one end facing the second bracket 8. The sleeves 20 are located on the same circumference, and the plurality of sleeves 20 can be rolled in the annular groove 22.

[0070] By setting up a mounting plate 19 and forming an annular groove 22 between the protrusion 21 of the mounting plate 19 and the outer annular wall 18, the outer peripheral wall of the protrusion 21 can be used to form the inner annular wall of the annular groove 22, and the inner annular wall can be used to support the shaft sleeves 20 evenly arranged along the circumference of the annular groove 22, so as to form a support limit for each shaft sleeve 20, thereby ensuring that the second bracket 8 forms a stable and balanced force on the air duct drive wheel 13 in the circumferential direction, avoiding the uneven force problem caused by the force on a single shaft sleeve 20, improving the stability and reliability of the air duct drive wheel 13 during rotation, playing a role in limiting the volute air duct 1, and ensuring that the volute air duct 1 can rotate smoothly.

[0071] In this embodiment, the second motor 16 is installed on the protrusion 21, which can reduce the distance between the motor shaft of the second motor 16 and the air duct driving wheel 13, and at the same time enable the motor shaft of the second motor 16 to more conveniently drive and cooperate with the inner gear ring 15 of the air duct driving wheel 13.

[0072] The motor in this embodiment is, for example, a stepper motor, and a motor fixing position is provided on the mounting plate 19. A driving gear 17 is installed on the stepper motor. The stepper motor passes through the hole reserved on the mounting plate 19 of the second bracket 8, so that the driving gear 17 cooperates with the inner ring gear 15 of the air duct drive wheel 13, and is driven by the stepper motor to rotate the volute air duct 1.

[0073] A second end cover 41 is provided at the end opening of the second bracket 8 , which can seal the second bracket 8 , thereby effectively protecting the second motor 16 located in the second bracket 8 .

[0074] A rolling bracket 23 is mounted on the second bracket 8, and a roller 25 is provided on the rolling bracket 23. An end ring 24 is provided at the second end of the crossflow blade 2. The roller 25 supports the end ring 24 and rotates with the end ring 24. The provision of the end ring 24 at the second end of the crossflow blade 2 not only facilitates the connection and fixation between the blades of the crossflow blade 2, thereby improving the structural strength of the crossflow blade 2, but also facilitates the rolling engagement between the crossflow blade 2 and the roller 25.

[0075] The rolling bracket 23 is provided with a first support 26 and a second support 27 , and both the first support 26 and the second support 27 are provided with rollers 25 . The roller 25 on the first support 26 is located on the outer periphery of the end ring 24 , and the roller 25 on the second support 27 is located on the inner periphery of the end ring 24 .

[0076] In this embodiment, there is one first support 26 and two second supports 27. In a cross section perpendicular to the rotational axis of the crossflow blade 2, the rollers 25 on the two second supports 27 are symmetrical about a line connecting the center of the roller 25 on the first support 26 and the rotational axis. In this embodiment, one roller 25 is provided on each support, for a total of three rollers 25. Two rollers 25 are located on the inner circumference of the end ring 24, and one roller 25 is located on the outer circumference of the end ring 24. The three rollers 25 cooperate to restrict the vertical movement of the second end of the crossflow blade 2, thereby maintaining balance at the second end of the crossflow blade 2 and preventing shaking during rotation, thereby improving the stability and reliability of the operating structure of the crossflow blade 2.

[0077] In one embodiment, an annular groove 28 is provided on the outer circumferential wall of the end ring 24, and the roller 25 on the first support 26 is located within the annular groove 28. In this embodiment, an annular protrusion is provided on the outer circumferential wall of the end ring 24 at one end near the second bracket 8. This annular protrusion forms the annular groove 28 on the second bracket 8, thereby cooperating with the roller 25 to limit the axial movement of the crossflow blade 2 and ensure the stability of the rotation structure of the crossflow blade 2. The roller 25 is, for example, a rubber roller.

[0078] In one embodiment, an annular groove 28 is provided on the inner circumferential wall of the end ring 24, and the roller 25 on the second support 27 is located in the annular groove 28. In this embodiment, the inner circumferential side of the end ring 24 can cooperate with the roller 25 to axially limit the crossflow blade 2, thereby improving the stability and reliability of the crossflow blade 2 during operation.

[0079] In one embodiment, the rolling bracket 23 is provided with a central hole. The second end of the first heat exchanger 3 engages with the rolling bracket 23. The second end of the first heat exchanger 3 is provided with an inlet and outlet pipe 14, which passes through the central hole. In this embodiment, the rolling bracket 23 is located between the air duct drive wheel 13 and the second bracket 8, so a pipe outlet for the heat exchanger is required. By providing the central hole in the rolling bracket 23, it can be used to form an escape structure, facilitating the inlet and outlet pipes 14 of the first heat exchanger 3 to pass through this hole and connect to external pipes.

[0080] In this embodiment, the rolling bracket 23 mainly plays a supporting role for the crossflow fan blade 2, so the rolling bracket 23 can be fixedly connected to the second bracket 8 or movably connected, and it is only necessary to ensure that the rolling bracket 23 does not rotate relative to the second bracket 8.

[0081] A cantilever frame 29 is provided between the rolling support 23 and the first heat exchanger 3. The first end of the cantilever frame 29 is fixedly connected to the first end of the first heat exchanger 3, and the second end of the cantilever frame 29 is fixedly connected to the rolling support 23. By providing the cantilever frame 29, the cantilever end of the first heat exchanger 3 can be fixed by the cantilever frame 29, thereby enhancing the overall structural strength of the first heat exchanger 3, preventing the cantilever end of the first heat exchanger 3 from sagging, and improving the stability and reliability of the overall structure of the first heat exchanger 3.

[0082] In this embodiment, an opening is provided on the first support 26 of the rolling bracket 23, and the second end of the cantilever bracket 29 forms a bent portion after passing through the opening. The bent portion is attached to the back side of the first support 26 and fixed by screws, so that the second end of the cantilever bracket 29 is fixedly connected to the rolling bracket 23. The rolling bracket 23 can be used to provide a pulling effect on the cantilever end of the first heat exchanger 3, so that the cantilever end of the first heat exchanger 3 is supported, thereby reducing the imbalance effect at both ends of the first heat exchanger 3 and reducing the adverse effects of the cantilever structure of the first heat exchanger 3 on the first heat exchanger 3.

[0083] A folded edge 30 is provided on the cantilever frame 29, and the folded edge 30 is located between the first heat exchanger 3 and the rolling bracket 23. It can limit the first heat exchanger 3 to prevent the first heat exchanger 3 and the rolling bracket 23 from colliding when the indoor unit falls, thereby effectively protecting the first heat exchanger 3 and the rolling bracket 23.

[0084] The folded edge 30 is formed by punching the cantilever frame 29, which is easy to form, has good structural strength, is easy to realize, and is convenient to obtain materials.

[0085] The rolling bracket 23 is provided with a first sleeve 31 , and the second bracket 8 is provided with a second sleeve 32 . The first sleeve 31 and the second sleeve 32 are sleeved together, and an anti-rotation fit is formed between the first sleeve 31 and the second sleeve 32 .

[0086] The outer periphery of the first sleeve 31 is provided with a protrusion 33, and the inner periphery of the second sleeve 32 is provided with a slot, into which the protrusion 33 is snapped. The first sleeve 31 and the second sleeve 32 can also be fixedly connected together by screws.

[0087] A water receiving tray 34 is provided at the bottom of the first heat exchanger 3 . A drainage hole is provided on the water receiving tray 34 . A drainage pipe 35 is connected to the drainage hole.

[0088] In this embodiment, the water receiving tray 34 is an angled water receiving tray, the first end of which is fixed to the elbow bracket of the first heat exchanger 3 by a buckle, and the bottom of which is a V-shaped water storage tray.

[0089] The first end of the cantilever frame 29 is fixedly connected to the bracket structure of the first end of the water receiving tray 34. Since the bent pipe bracket of the first heat exchanger 3 is fixed to the bracket structure of the water receiving tray 34 by a snap, the first end of the cantilever frame 29 is fixedly connected to the bracket structure of the first end of the water receiving tray 34, and the second end is fixedly connected to the rolling bracket 23. The bottom of the water receiving tray 34 and the rolling bracket 23 are fixedly connected by screws, which can connect the first heat exchanger 3, the angled frame water receiving tray and the rolling bracket 23 together to form an integral structure.

[0090] In this embodiment, when connecting the cantilever frame 29, the first end of the cantilever frame 29 can be inserted obliquely into the mounting groove of the bracket structure of the angle frame water receiving tray during installation, and then the cantilever frame 29 can be laid flat. After that, the cantilever frame 29 is passed through the opening on the first support 26 of the rolling bracket 23 and pressed down into place. After that, the first end of the cantilever frame 29 is locked and fixed to the angle frame water receiving tray by means of snap connection or screw connection, and the second end is fixedly connected to the rolling bracket 23 by screws.

[0091] Finally, the first heat exchanger 3, inlet and outlet pipes 14, drain pipe 35, rolling bracket 23, water receiving tray 34 and cantilever bracket 29 in this embodiment are assembled together to form a heat exchanger assembly, and the heat exchanger assembly is fixedly connected to the second bracket 8 to form a cantilever structure.

[0092] In one embodiment, an auxiliary air duct 36 is provided on the base 6, and the auxiliary air duct 36 includes a second air outlet 37. When the volute air duct 1 rotates to the position of the base 6, the first air outlet 5 of the volute air duct 1 is connected to the inlet of the auxiliary air duct 36, and the indoor unit discharges air from the second air outlet 37 of the auxiliary air duct 36.

[0093] In this embodiment, by setting an auxiliary air duct 36 on the base 6, when the volute air duct 1 rotates to the position of the auxiliary air duct 36, it can be connected with the auxiliary air duct 36, so that the air out of the air outlet of the volute air duct 1 enters the auxiliary air duct 36, and then is discharged from the auxiliary air duct 36, thereby generating a new function.

[0094] In one embodiment, a sweeping blade 38, a wind guide plate or a breeze sensor component is provided at the second air outlet 37. When the volute air duct 1 is connected with the auxiliary air duct 36, a sweeping function or a breeze sensor function can be realized.

[0095] An air guide plate can also be provided at the air outlet of the volute air duct 1 to cooperate with the air outlet structure at the second air outlet 37 to achieve more forms of air outlet, greatly expanding the air outlet mode of the air conditioner.

[0096] In one embodiment, a plasma generator 39 is provided at the second air outlet 37 to realize ion air outlet.

[0097] In other embodiments, other functional components may be added to the base 6 and combined with the volute air duct 1 to achieve different air outlet functions to meet the user's needs.

[0098] In this embodiment, the fixed bottom casing volute duct of a conventional wall-mounted unit is creatively redesigned into a rotatable, air-guiding volute duct 1, enabling wide-area air sweeping, exceeding the range of conventional fixed air guides. Air flows to the floor during heating and to the roof during cooling, achieving carpet-like heating and rain-like cooling, enhancing air conditioning comfort.

[0099] See also Figures 2 to 6 The figure shows the wind sweeping angle of the indoor unit of this embodiment. Figure 4 The position reaches the rain-style cooling air outlet angle, forming cold air from the roof downward, providing comfortable cooling. Figure 6 When the air outlet of the volute rotates to the upper end of the base, the air outlet on the base 6 opens, and the wind guide plate presses the wind downward, so that the hot air reaches the ground directly, achieving a carpet-lifting heating effect. Figures 2 to 6 During the air sweeping process, the angle of the volute air duct 1 changes continuously.

[0100] In one embodiment, a heat insulation layer is provided on the inner wall of the volute air duct 1 , which can improve the anti-condensation capability of the volute air duct 1 .

[0101] According to an embodiment of the present application, the air conditioner includes an indoor unit, which is the indoor unit described above.

[0102] In one embodiment, the air conditioner is a desktop air conditioner, and the distance between the base 6 and the central axis of the volute air duct 1 is greater than the maximum rotation radius of the volute air duct 1, so that the base 6 will not hinder the rotation of the volute air duct 1, and 360-degree air outlet can be achieved.

[0103] In one embodiment, the air conditioner is a mobile air conditioner. A compressor, a throttling device, and a second heat exchanger are integrated within a base 6. The compressor, second heat exchanger, throttling device, and first heat exchanger 3 are sequentially connected to form a refrigerant flow loop. In this embodiment, the outdoor components, such as the compressor, throttling device, and second heat exchanger, are integrated into the base 6, resulting in a mobile, all-in-one air conditioner with 360-degree rotating air sweeping for indoor use. To facilitate the movement of this mobile, all-in-one air conditioner, wheels 42 may be provided at the bottom of the base 6. These wheels 42 may be, for example, universal wheels.

[0104] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0105] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. An indoor unit, characterized in that: The invention comprises a volute air duct (1), a crossflow fan blade (2) and a first heat exchanger (3), wherein the volute air duct (1) comprises an air inlet (4) and a first air outlet (5), the crossflow fan blade (2) is rotatably arranged in the volute air duct (1), the first heat exchanger (3) is arranged on the radial inner side of the crossflow fan blade (2), and the air flow entering from the air inlet (4) flows to the first air outlet (5) through the first heat exchanger (3); The indoor unit comprises a base (6), a first end of the base (6) is provided with a first bracket (7), a second end of the base (6) is provided with a second bracket (8), a first end of the volute air duct (1) is mounted on the first bracket (7), a second end of the volute air duct (1) is mounted on the second bracket (8), a first end of the crossflow fan blade (2) is mounted on the first bracket (7), a second end of the crossflow fan blade (2) is mounted on the second bracket (8), and a second end of the first heat exchanger (3) is mounted on the second bracket (8); The volute air duct (1) is rotatably mounted on the first bracket (7) and the second bracket (8), and the first end of the first heat exchanger (3) is suspended in the air; The first bracket (7) includes a motor cavity, a first motor (9) is disposed in the motor cavity, and the first motor (9) is drivingly connected to the first end of the crossflow blade (2); An air duct driving wheel (13) is mounted on the second bracket (8), the air duct driving wheel (13) is rotatable relative to the second bracket (8), and the volute air duct (1) is mounted on the air duct driving wheel (13); The second bracket (8) includes an outer ring wall (18), and a plurality of shaft sleeves (20) are circumferentially arranged on one end of the air duct driving wheel (13) facing the second bracket (8), wherein the shaft sleeves (20) are located on the same circumference, and the plurality of shaft sleeves (20) are located on the inner side of the outer ring wall (18) and are in rolling engagement with the inner circumferential wall of the outer ring wall (18); or, The second bracket (8) includes an outer annular wall (18) and a mounting plate (19), the mounting plate (19) includes a protrusion (21) protruding toward the air duct drive wheel (13), an annular groove (22) is formed between the protrusion (21) and the outer annular wall (18), and a plurality of shaft sleeves (20) are circumferentially arranged at one end of the air duct drive wheel (13) facing the second bracket (8), the shaft sleeves (20) are located on the same circumference, and the plurality of shaft sleeves (20) can be rolled in the annular groove (22).

2. The indoor unit according to claim 1, characterized in that: A convex shaft (10) is provided at one end of the first bracket (7) facing the volute air duct (1), a supporting bearing (11) is provided on the outer sleeve of the convex shaft (10), and the first end of the volute air duct (1) is mounted on the supporting bearing (11).

3. The indoor unit according to claim 1, wherein: The air duct driving wheel (13) has a center hole, the first heat exchanger (3) has an inlet and outlet pipeline (14), the inlet and outlet pipeline (14) passes through the center hole, an inner ring gear (15) is provided on the inner peripheral wall of the center hole, a second motor (16) and a driving gear (17) are provided on the second bracket (8), the driving gear (17) is provided at the output end of the second motor (16), and the driving gear (17) is meshed with the inner ring gear (15).

4. The indoor unit according to claim 1, wherein: A rolling bracket (23) is mounted on the second bracket (8), a roller (25) is provided on the rolling bracket (23), an end ring (24) is provided at the second end of the crossflow blade (2), and the roller (25) supports the end ring (24) and rotates with the end ring (24).

5. The indoor unit according to claim 4, characterized in that: The rolling bracket (23) is provided with a first support (26) and a second support (27), and the first support (26) and the second support (27) are both provided with the roller (25), the roller (25) on the first support (26) is located on the outer periphery of the end ring (24), and the roller (25) on the second support (27) is located on the inner periphery of the end ring (24).

6. The indoor unit according to claim 5, characterized in that: An annular groove (28) is provided on the outer peripheral wall of the end ring (24), and the roller (25) on the first support (26) is located in the annular groove (28); and / or an annular groove (28) is provided on the inner peripheral wall of the end ring (24), and the roller (25) on the second support (27) is located in the annular groove (28).

7. The indoor unit according to claim 5, characterized in that: There is one first support (26) and two second supports (27). In a cross section perpendicular to the rotation axis of the crossflow fan blade (2), the rollers (25) on the two second supports (27) are symmetrical about a line connecting the center of the roller (25) on the first support (26) and the rotation axis.

8. The indoor unit according to claim 4, characterized in that: The rolling bracket (23) is provided with a center hole, the second end of the first heat exchanger (3) is snap-fitted with the rolling bracket (23), the second end of the first heat exchanger (3) is provided with an inlet and outlet pipe (14), and the inlet and outlet pipe (14) passes through the center hole; and / or, a cantilever bracket (29) is provided between the rolling bracket (23) and the first heat exchanger (3), the first end of the cantilever bracket (29) is fixedly connected to the first end of the first heat exchanger (3), and the second end of the cantilever bracket (29) is fixedly connected to the rolling bracket (23); and / or, a first sleeve (31) is provided on the rolling bracket (23), and a second sleeve (32) is provided on the second bracket (8), the first sleeve (31) and the second sleeve (32) are sleeved, and an anti-rotation fit is formed between the first sleeve (31) and the second sleeve (32).

9. The indoor unit according to any one of claims 1 to 8, characterized in that: The base (6) is provided with an auxiliary air duct (36), and the auxiliary air duct (36) includes a second air outlet (37). When the volute air duct (1) rotates to the position of the base (6), the first air outlet (5) of the volute air duct (1) is connected to the inlet of the auxiliary air duct (36), and the indoor unit discharges air from the second air outlet (37) of the auxiliary air duct (36).

10. An air conditioner comprising an indoor unit, characterized in that: The indoor unit is the indoor unit according to any one of claims 1 to 9.

11. The air conditioner according to claim 10, characterized in that The air conditioner is a desktop air conditioner, and when the indoor unit includes a base (6), the distance between the base (6) and the central axis of the volute air duct (1) is greater than the maximum rotation radius of the volute air duct (1).

12. The air conditioner according to claim 10, wherein: The air conditioner is a mobile air conditioner. When the indoor unit includes a base (6), a compressor, a throttling device and a second heat exchanger are integrated in the base (6). The compressor, the second heat exchanger, the throttling device and the first heat exchanger (3) are connected in sequence to form a refrigerant flow cycle.

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