Hanging indoor unit

Abstract

The invention provides a hanging indoor unit, and relates to the field of air conditioners. The hanging indoor unit comprises a base, a filter screen assembly and a power assembly, and an air inlet is formed in the base; the filter screen assembly comprises a top cover, a reel and a filter screen, the filter screen is wound on the reel, the reel is rotatably mounted on the top cover, and the top cover is mounted at the air inlet; the power assembly comprises a driving motor, a driving wheel and a protective cover. The driving motor is installed on the machine base. The driving wheel is coaxially and fixedly connected with an output shaft of the driving motor and is in transmission connection with the driven wheel which is coaxially and fixedly connected with the reel; the shield is arranged on the side, away from the driving motor, of the driving wheel, fixedly connected with the machine base and used for preventing the driving wheel from being away from the driving motor in the axial direction. According to the wall-mounted indoor unit, the protective cover can axially block and limit the driving wheel, and it can be guaranteed that transmission between the driving motor and the driving wheel and transmission between the driving wheel and the driven wheel are accurate and stable; the protective cover can further protect the driving wheel part located in the containing space of the protective cover.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a wall mounted indoor unit. Background Art

[0002] In order to reduce the number of times the filter needs to be replaced or increase the service life of the filter, some air-conditioning indoor units are equipped with rolled filters, with the two ends of the filter rolled on two reels respectively. When the unfolded part of the filter located between the two reels is dirty and clogged, the dirty and clogged part can be rolled up on one of the reels, and at the same time, a part of the new filter is unfolded to cover the air inlet of the air-conditioning indoor unit.

[0003] Specifically, the output shaft of the driving motor is coaxially connected to the driving wheel of the transmission assembly, and the driven wheel of the transmission assembly is coaxially connected to the reel; when the unfolded part of the filter is dirty and blocked, the driving motor is started, the driving motor drives the transmission assembly and finally drives the reel to rotate to roll up the dirty and blocked part of the filter. Compared with manual rewinding, rewinding by the power assembly saves time and effort. However, in the air conditioner indoor unit in the prior art, the driving wheel is easily separated from the output shaft of the driving motor, so the transmission is not stable enough. Summary of the invention

[0004] The purpose of the present invention is to provide a wall mounted indoor unit to solve the technical problem in the prior art that the power component transmission of the filter reel of the indoor unit of the air conditioner is not stable enough.

[0005] The wall-mounted indoor unit provided by the present invention comprises a base, a filter assembly and a power assembly, the base is provided with an air inlet; the filter assembly comprises a top cover, a reel and a filter, the filter is rolled up on the reel, the reel is rotatably mounted on the top cover, and the top cover is mounted on the air inlet; the power assembly comprises a drive motor, a drive wheel and a shield, the drive motor is mounted on the base; the drive wheel is coaxially fixedly connected to the output shaft of the drive motor, and is transmission-connected to a driven wheel coaxially fixedly connected to the reel; the shield is arranged on a side of the drive wheel away from the drive motor, and is fixedly connected to the base, and the shield is used to prevent the drive wheel from moving axially away from the drive motor.

[0006] The wall mounted indoor unit provided by the present invention can produce the following beneficial effects:

[0007] In the wall mounted indoor unit provided by the present invention, since a protective cover is provided on the side of the driving wheel away from the driving motor, the protective cover can serve as an axial blocking and limiting function for the driving wheel, so that the driving wheel can be effectively prevented from moving in a direction away from the driving motor or even from the output shaft of the driving motor, thereby ensuring the accurate position of the driving wheel, and further ensuring the accurate and stable transmission between the driving motor and the driving wheel and between the driving wheel and the driven wheel, so that the driving motor can accurately roll up or release the filter. In addition, the protective cover can also protect the driving wheel portion located in its accommodating space, providing a guarantee for the good operation of the power assembly.

[0008] Furthermore, the top cover is detachably mounted on the air inlet.

[0009] Under this technical solution, if the reel or filter needs to be inspected, replaced or cleaned, it is only necessary to remove the top cover from the air inlet, and the reel and filter arranged on the top cover can be removed together; after the inspection, replacement or cleaning is completed, the reel and filter are installed to the top cover, and then the top cover is installed to the air inlet, and the filter assembly can be installed as a whole to the base, that is, the disassembly and installation of the reel and filter are very convenient.

[0010] Furthermore, the base includes a face shell and a base, the air inlet is opened at the top of the face shell; the base is fixedly connected to the rear side of the face shell; the drive motor, the drive wheel and the shield are all installed on the top of the base.

[0011] Under this technical solution, when disassembling the filter assembly as a whole, there is no need to disassemble the drive motor, drive wheel, and shield, etc., and it is only necessary to disconnect the transmission connection between the drive wheel and the driven wheel, which is still very convenient.

[0012] Furthermore, the base is provided with a first accommodating space, and the driving motor is fixedly installed in the first accommodating space; the protective cover includes a limiting plate and a side wall fixedly arranged on one side of the limiting plate, the limiting plate and the side wall form a second accommodating space, the second accommodating space is connected to the first accommodating space, and the driving wheel is located in the second accommodating space.

[0013] Under this technical solution, the base and the shield provide accommodation space for the drive motor and the drive wheel, and can also limit and protect the drive motor and the shield.

[0014] Furthermore, the housing of the driving motor is provided with an ear plate, the ear plate is provided with a mounting hole, and a fastener passes through the mounting hole and fixes the driving motor to the base.

[0015] Furthermore, a limiting ring is provided on the inner wall of the limiting plate, a socket is provided on one side of the driving wheel, and a convex shaft is provided on the other side, the output shaft of the driving motor is inserted into the socket, and the convex shaft is rotatably inserted in the limiting ring.

[0016] Under this technical solution, the limit ring plays a role in radially limiting the driving wheel by radially limiting the cam shaft, which can effectively prevent the driving wheel from shaking in the radial direction and make the transmission smoother.

[0017] Further, the driving wheel is a driving gear, the driven wheel is a driven gear, the driving gear and the driven gear are meshed and transmitted; the shield is provided with a first notch, the driving gear is exposed from the first notch and meshed with the driven gear;

[0018] Alternatively, the driving wheel is a driving sprocket, the driven wheel is a driven sprocket, a transmission chain is wound around the driving sprocket and the driven sprocket; the shield is provided with a second notch, and the transmission chain passes through the second notch;

[0019] Alternatively, the driving wheel is a driving pulley, the driven wheel is a driven pulley, a transmission belt is wound around the driving pulley and the driven pulley; the shield is provided with a third notch, and the transmission belt passes through the third notch.

[0020] Under this technical solution, when the filter assembly is disassembled as a whole, the transmission assembly can automatically cut off the connection or only need to remove the transmission chain or transmission belt; when the filter assembly is installed as a whole, the transmission assembly can automatically re-establish the connection or only need to hang up the transmission chain or transmission belt, that is, the disassembly and assembly of the filter assembly is relatively convenient.

[0021] Furthermore, one of the side wall of the shield and the base is provided with a latching protrusion, and the other is provided with a latching hole, and the latching protrusion is latched in the corresponding latching hole; and / or, the shield is provided with a fixing ear, and the fixing ear has a fixing hole, and a fastener passes through the fixing hole to fix the shield to the base.

[0022] Preferably, the shield and the base can be first snap-fitted and then connected via fasteners, so that the connection between the two is more firm and reliable.

[0023] Furthermore, the base is provided with at least one limiting bar, and the limiting bar is located between the driving motor and the driving wheel, on the side of the output shaft of the driving motor and in contact with the housing of the driving motor.

[0024] Under this technical solution, the limit bar simultaneously plays a blocking and limiting role on the housing of the drive motor and the drive gear, which is conducive to stable power output and transmission.

[0025] Furthermore, the base is also provided with a heat dissipation hole, and the heat dissipation hole is communicated with the first accommodating space.

[0026] Under this technical solution, the heat dissipation holes can dissipate heat from the drive motor relatively quickly, thereby facilitating the drive motor to operate at a suitable temperature.

[0027] Furthermore, the base is also provided with an electric control box, and the drive motor is connected to a circuit board in the electric control box.

[0028] Under this technical solution, the drive motor and the electronic control box are both arranged on the base. Therefore, when removing the filter assembly, there is no need to cut off the connection between the drive motor and the circuit board; when installing the filter assembly, there is no need to reconnect the connection between the drive motor and the circuit board, thereby ensuring the convenience of disassembling and assembling the filter assembly.

[0029] Furthermore, the base is provided with a wire passing clamp, and the wire passing clamp fixes the connecting wire between the driving motor and the circuit board to the base.

[0030] Under this technical solution, the wire pass card can restrain and fix the connecting wires between the drive motor and the circuit board, which can effectively prevent other components from interfering with it, thereby ensuring a reliable connection between the drive motor and the circuit board. Of course, it can also effectively prevent the connecting wires from interfering with other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0032] Figure 1 One of the partial assembly structure schematic diagrams of the on-hook indoor unit provided in an embodiment of the present invention;

[0033] Figure 2 One of the partial exploded structural diagrams of the on-hook indoor unit provided by an embodiment of the present invention;

[0034] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0035] Figure 4 The second schematic diagram of the partial assembly structure of the on-hook indoor unit provided by the embodiment of the present invention;

[0036] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0037] Figure 6 The second schematic diagram of the partial decomposition structure of the on-hook indoor unit provided by the embodiment of the present invention;

[0038] Figure 7 for Figure 6 The enlarged schematic diagram of the center C;

[0039] Figure 8 The third schematic diagram of the partial decomposition structure of the on-hook indoor unit provided by the embodiment of the present invention;

[0040] Fig. 9 for Figure 8 The enlarged schematic diagram of point D in the middle;

[0041] Fig.10 A partial cross-sectional structural schematic diagram of a wall mounted indoor unit provided by an embodiment of the present invention;

[0042] Fig.11 for Fig.10 The enlarged schematic diagram of point E in the middle;

[0043] Fig.12 One of the exploded structural diagrams of the drive gear and the protective cover of the on-hook indoor unit provided by the embodiment of the present invention;

[0044] Fig.13 The second schematic diagram of the exploded structure of the driving gear and the protective cover of the indoor unit provided by the embodiment of the present invention;

[0045] Fig.14 A schematic diagram of the partial structure of an on-hook indoor unit provided in an embodiment of the present invention.

[0046] Description of reference numerals:

[0047] 100-face shell; 110-air inlet;

[0048] 200-filter assembly; 210-top cover; 221-active reel; 222-driven reel; 230-filter;

[0049] 310-driving motor; 311-output shaft; 312-ear plate; 313-mounting hole; 320-driving gear; 321-jack; 322-convex shaft; 330-shield; 331-limiting plate; 332-limiting ring; 333-side wall; 334-clamping hole; 335-first notch; 336-fixing ear; 337-fixing hole; 338-avoidance groove; 340-driven gear;

[0050] 400 - base; 410 - first accommodating space; 420 - clamping protrusion; 430 - limiting strip; 440 - heat dissipation hole; 450 - wire pass card. DETAILED DESCRIPTION

[0051] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] This embodiment provides a wall mounted indoor unit, such as Figures 1 to 5 As shown, the wall mounted indoor unit comprises a base, a filter assembly 200 and a power assembly, the base is provided with an air inlet 110; the filter assembly 200 comprises a top cover 210, a reel and a filter 230, the filter 230 is rolled up on the reel, the reel is rotatably mounted on the top cover 210, and the top cover 210 is mounted on the air inlet 110; the power assembly comprises a drive motor 310, a drive wheel and a shield 330, the drive motor 310 is mounted on the base; the drive wheel is coaxially fixedly connected to the output shaft 311 of the drive motor 310, and is transmission-connected to a driven wheel coaxially fixedly connected to the reel; the shield 330 is arranged on the side of the drive wheel away from the drive motor 310, and is fixedly connected to the base, the shield 330 is used to prevent the drive wheel from moving axially away from the drive motor 310.

[0053] In the on-hook indoor unit provided in this embodiment, since a shield 330 is provided on the side of the driving wheel away from the driving motor 310, the shield 330 can serve as an axial blocking and limiting function for the driving wheel, so that the driving wheel can be effectively prevented from moving in a direction away from the driving motor 310 or even from the output shaft 311 of the driving motor 310, thereby ensuring the accurate position of the driving wheel, and further ensuring the accurate and stable transmission between the driving motor 310 and the driving wheel, and between the driving wheel and the driven wheel, so that the driving motor 310 can accurately roll up or release the filter 230. In addition, the shield 330 can also protect the driving wheel portion located in its accommodating space, providing a guarantee for the good operation of the power assembly.

[0054] Specifically, in this embodiment, Figure 2 As shown, the top cover 210 is detachably mounted on the air inlet 110. In this arrangement, if the reel or the filter 230 needs to be inspected, replaced or cleaned, the top cover 210 only needs to be removed from the air inlet 110, and the reel and the filter 230 arranged on the top cover 210 can be removed together; after the inspection, replacement or cleaning is completed, the reel and the filter 230 are installed on the top cover 210, and then the top cover 210 is installed on the air inlet 110, and the filter assembly 200 can be installed as a whole on the base, that is, the removal and installation of the reel and the filter 230 are very convenient.

[0055] Specifically, in this embodiment, Figures 2 to 11As shown, the base includes a housing 100 and a base 400, and the air inlet 110 is opened at the top of the housing 100; the base 400 is fixedly connected to the rear side of the housing 100; the drive motor 310, the drive wheel and the shield 330 are all installed on the top of the base 400. In this arrangement, when the filter assembly 200 is disassembled as a whole, it is not necessary to disassemble the drive motor 310, the drive wheel and the shield 330, etc., and it is only necessary to disconnect the transmission connection between the drive wheel and the driven wheel, which is still very convenient.

[0056] It should be noted here that in other embodiments of the present application, the drive motor 310, the drive wheel and the shield 330 are not limited to being installed on the base 400, but can also be installed on other parts of the base, such as the middle frame.

[0057] Specifically, in this embodiment, Figure 2 and Fig.14 As shown, the reel includes an active reel 221 and a driven reel 222, which are respectively arranged at opposite ends of the top cover 210 and are parallel to each other; one end of the filter 230 is fixedly arranged on the active reel 221, and the other end is fixedly arranged on the driven reel 222; and the driven gear 340 is coaxially fixedly arranged on the active reel 221. Under this arrangement, when the unfolded part of the filter 230 is dirty and blocked, the drive motor 310 can be started to drive the drive gear 320 to rotate, the drive gear 320 drives the driven gear 340 to rotate, and the driven gear 340 drives the active reel 221 to rotate, so that the dirty and blocked part of the filter 230 can be rolled up on the active reel 221, and at the same time, the filter 230 drives the driven reel 222 to rotate, so that the clean part of the filter 230 can be unfolded and blocked at the air inlet 110.

[0058] Specifically, in this embodiment, Figure 7 and Fig. 9 As shown, the base 400 is provided with a first accommodating space 410, and the drive motor 310 is fixedly installed in the first accommodating space 410; the shield 330 includes a limit plate 331 and a side wall 333 fixedly arranged on one side of the limit plate 331, and the limit plate 331 and the side wall 333 enclose a second accommodating space, and the second accommodating space is connected to the first accommodating space 410, and the drive wheel is located in the second accommodating space. In this arrangement, the base 400 and the shield 330 provide accommodating space for the drive motor 310 and the drive wheel, and can limit and protect the drive motor 310 and the shield 330.

[0059] Specifically, in this embodiment, continue as Figure 7 and Fig. 9As shown, the housing of the driving motor 310 is provided with an ear plate 312, and the ear plate 312 is provided with a mounting hole 313, and the fastener passes through the mounting hole 313 and fixes the driving motor 310 to the base 400. More specifically, in this embodiment, the number of the ear plates 312 is two, and the two ear plates 312 are respectively provided on opposite sides of the housing of the driving motor 310, and the two fasteners respectively pass through the two mounting holes 313 on the two ear plates 312 and are fixed to the base 400. In this way, the fastener fixes the driving motor 310 more firmly. More specifically, in this embodiment, the fastener is a screw.

[0060] Specifically, in this embodiment, Figures 11 to 13 As shown, a limiting ring 332 is provided on the inner wall of the limiting plate 331, a plug hole 321 is provided on one side of the driving wheel, and a convex shaft 322 is provided on the other side, the output shaft 311 of the driving motor 310 is inserted into the plug hole 321, and the convex shaft 322 is rotatably inserted into the limiting ring 332. In this arrangement, the limiting ring 332 plays a role in radially limiting the driving wheel by radially limiting the convex shaft 322, which can effectively prevent the driving wheel from shaking in the radial direction and make the transmission more stable.

[0061] Specifically, in this embodiment, Figures 10 to 14 As shown, the driving wheel is the driving gear 320 , and the driven wheel is the driven gear 340 , and the driving gear 320 and the driven gear 340 are meshed for transmission; the shield 330 is provided with a first notch 335 , and the driving gear 320 is exposed from the first notch 335 and meshed with the driven gear 340 . Under this arrangement, when the top cover 210 is removed from the face shell 100 and the reel and filter 230 arranged on the top cover 210 are removed together, the driven gear 340 of the transmission assembly will automatically disengage from the driving gear 320, without the need to separately disassemble the transmission assembly or cut off the transmission connection; after inspection, replacement or cleaning, the reel and filter 230 are installed to the top cover 210, and then the top cover 210 is installed to the air inlet 110 of the face shell 100, and the filter assembly 200 can be installed as a whole to the face shell 100, and the driven gear 340 of the transmission assembly will automatically re-engage with the driving gear 320 to re-establish the transmission connection, without the need for other installation or connection operations.

[0062] It should be noted that in other embodiments of the present application, the driving wheel is not limited to the driving gear 320, and the driven wheel is not limited to the driven gear 340, but other transmission methods can also be used, for example: the driving wheel is a driving sprocket, the driven wheel is a driven sprocket, and a transmission chain is wound around the driving sprocket and the driven sprocket; the shield 330 is provided with a second notch, and the transmission chain passes through the second notch; or, the driving wheel is a driving pulley, the driven wheel is a driven pulley, and a transmission belt is wound around the driving pulley and the driven pulley; the shield 330 is provided with a third notch, and the transmission belt passes through the third notch. Because the disassembly and assembly of the transmission chain and the transmission belt are also relatively convenient, whether chain drive or belt drive is used, it is still relatively convenient to disassemble and install the filter assembly 200.

[0063] Specifically, in this embodiment, Figure 7 and Fig. 9 As shown, the base 400 is provided with a clamping protrusion 420, and the side wall 333 of the shield 330 is provided with a clamping hole 334, and the clamping protrusion 420 is clamped in the corresponding clamping hole 334. In this arrangement, the shield 330 and the base 400 are fixedly connected by clamping, and the assembly is very convenient. It should be noted here that in other embodiments of the present application, the clamping protrusion 420 can also be set on the side wall 333 of the shield 330, and correspondingly, the clamping hole 334 is set on the base 400.

[0064] Specifically, in this embodiment, Fig.11 As shown, the shield 330 is provided with a fixing ear 336, and the fixing ear 336 is provided with a fixing hole 337, and the fastener passes through the fixing hole 337 to fix the shield 330 to the base 400. In this arrangement, the shield 330 and the base 400 are first clamped and then connected by the fastener, and the connection between the two is more firm and reliable. Of course, in other embodiments of the present application, the shield 330 and the base 400 can also be connected by only a clamping connection or only a fastener connection, as long as the two can be firmly connected.

[0065] Specifically, in this embodiment, Fig.11 and Fig.13 As shown, the fixing hole 337 is arranged obliquely, and the shield 330 is provided with an avoidance groove 338, which is arranged close to the fixing ear 336 for avoiding the screws fixed in the fixing hole 337 and the tools for installing or removing the screws.

[0066] Specifically, in this embodiment, Figure 7 and Fig. 9As shown, the base 400 is provided with two limit bars 430, which are respectively located on both sides of the output shaft 311 of the driving motor 310, and are both located between the driving motor 310 and the driving gear 320, and are both in contact with the housing of the driving motor 310. In this arrangement, the limit bars 430 simultaneously play a blocking and limiting role on the housing of the driving motor 310 and the driving gear 320, which is conducive to stable power output and transmission.

[0067] It should be noted here that although the setting of two limit bars 430 in this embodiment has a more balanced blocking effect on the drive motor 310, in other embodiments of the present application, the number of limit bars 430 is not limited to two. For example, the number of limit bars 430 can also be one, which is located between the drive motor 310 and the drive gear 320, on one side of the output shaft 311 of the drive motor 310 and in contact with the housing of the drive motor 310.

[0068] Specifically, in this embodiment, continue as Figure 7 and Fig. 9 As shown, the base 400 is further provided with a heat dissipation hole 440, which is in communication with the first accommodation space 410. In this arrangement, the heat dissipation hole 440 can dissipate heat from the drive motor 310 relatively quickly, thereby facilitating the drive motor 310 to operate at a suitable temperature.

[0069] Specifically, in this embodiment, the base 400 is also provided with an electric control box, and the drive motor 310 is connected to the circuit board in the electric control box. In this arrangement, the drive motor 310 and the electric control box are both arranged on the base 400, so when the filter assembly 200 is disassembled, there is no need to cut off the connection between the drive motor 310 and the circuit board; when the filter assembly 200 is installed, there is no need to reconnect the connection between the drive motor 310 and the circuit board, thereby ensuring the convenience of disassembling and assembling the filter assembly 200.

[0070] Specifically, in this embodiment, Figure 5 As shown, the base 400 is provided with a wire pass card 450, and the wire pass card 450 fixes the connecting wire between the drive motor 310 and the circuit board to the base 400. In this setting form, the wire pass card 450 has a binding and fixing effect on the connecting wire between the drive motor 310 and the circuit board, which can effectively prevent other components from interfering with it, thereby ensuring a reliable connection between the drive motor 310 and the circuit board. Of course, it can also effectively prevent the connecting wire from interfering with other components.

[0071] Finally, it should be noted that, in this article, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0072] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wall mounted indoor unit, characterized in that: include: The machine base is provided with an air inlet (110); A filter assembly (200) comprises a top cover (210), a reel and a filter (230), wherein the filter (230) is rolled up on the reel, the reel is rotatably mounted on the top cover (210), and the top cover (210) is mounted on the air inlet (110); A power assembly comprises a driving motor (310), a driving wheel and a shield (330), wherein the driving motor (310) is mounted on the machine base; the driving wheel is coaxially fixedly connected to an output shaft (311) of the driving motor (310), and is drivingly connected to a driven wheel coaxially fixedly connected to the reel; the shield (330) is arranged on a side of the driving wheel away from the driving motor (310), and is fixedly connected to the machine base, and the shield (330) is used to prevent the driving wheel from moving axially away from the driving motor (310).

2. The on-hook indoor unit according to claim 1, characterized in that: The top cover (210) is detachably mounted on the air inlet (110).

3. The on-hook indoor unit according to claim 1 or 2, characterized in that: The machine base comprises a face shell (100) and a base (400); the air inlet (110) is opened at the top of the face shell (100); the base (400) is fixedly connected to the rear side of the face shell (100); the driving motor (310), the driving wheel and the protective cover (330) are all installed on the top of the base (400).

4. The on-hook indoor unit according to claim 3, characterized in that: The base (400) is provided with a first accommodating space (410), and the driving motor (310) is fixedly installed in the first accommodating space (410); The protective cover (330) comprises a limiting plate (331) and a side wall (333) fixedly arranged on one side of the limiting plate (331); the limiting plate (331) and the side wall (333) enclose a second accommodating space; the second accommodating space is connected to the first accommodating space (410); and the driving wheel is located in the second accommodating space.

5. The on-hook indoor unit according to claim 4, characterized in that: A limiting ring (332) is provided on the inner wall of the limiting plate (331), a plug hole (321) is provided on one side of the driving wheel, and a convex shaft (322) is provided on the other side, the output shaft (311) of the driving motor (310) is inserted into the plug hole (321), and the convex shaft (322) is rotatably inserted into the limiting ring (332).

6. The on-hook indoor unit according to claim 4, characterized in that: The driving wheel is a driving gear (320), the driven wheel is a driven gear (340), and the driving gear (320) and the driven gear (340) are meshed and transmitted; the shield (330) is provided with a first notch (335), and the driving gear (320) is exposed from the first notch (335) and meshed with the driven gear (340); Alternatively, the driving wheel is a driving sprocket, the driven wheel is a driven sprocket, a transmission chain is wound around the driving sprocket and the driven sprocket; the shield (330) is provided with a second notch, and the transmission chain passes through the second notch; Alternatively, the driving wheel is a driving pulley, the driven wheel is a driven pulley, a transmission belt is wound around the driving pulley and the driven pulley; the protective cover (330) is provided with a third notch, and the transmission belt passes through the third notch.

7. The on-hook indoor unit according to claim 4, characterized in that: One of the side wall (333) of the shield (330) and the base (400) is provided with a locking protrusion (420), and the other is provided with a locking hole (334), and the locking protrusion (420) is locked in the corresponding locking hole (334); And / or, the shield (330) is provided with a fixing ear (336), the fixing ear (336) is provided with a fixing hole (337), and a fastener passes through the fixing hole (337) to fix the shield (330) to the base (400).

8. The on-hook indoor unit according to claim 4, characterized in that: The base (400) is provided with at least one limiting bar (430), and the limiting bar (430) is located between the drive motor (310) and the drive wheel, on the side of the output shaft (311) of the drive motor (310), and in contact with the housing of the drive motor (310).

9. The on-hook indoor unit according to claim 4, characterized in that: The base (400) is also provided with a heat dissipation hole (440), and the heat dissipation hole (440) is connected to the first accommodation space (410).

10. The on-hook indoor unit according to claim 3, characterized in that: The base (400) is also provided with an electric control box, and the drive motor (310) is connected to a circuit board in the electric control box.

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