Ceiling machine

Abstract

The invention provides a ceiling machine which comprises a shell, a motor and a wind wheel assembly are sequentially arranged in a containing cavity formed by the shell, the motor is in driving connection with the wind wheel assembly, a water pan and an air inlet net cover are arranged below the shell, the air inlet net cover is detachably connected with the water pan, the air inlet net cover and the wind wheel assembly are concentrically arranged, and the water pan is detachably connected with the air inlet net cover. The projection areas of the air inlet mesh enclosure and the wind wheel assembly on the horizontal plane are S1 and S2 respectively, wherein S1 is larger than or equal to S2. According to the ceiling unit, the wind wheel assembly and the motor in the ceiling unit can be disassembled and assembled under the condition that the water pan is not disassembled, so that the ceiling unit is easy to disassemble and assemble and high in cleaning and maintenance operation efficiency; the inlet air flow can be combed, the operation noise is further reduced, meanwhile, foreign matter is effectively prevented from entering the wind wheel assembly, and the operation is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a ceiling air conditioner. Background Art

[0002] Ceiling air conditioner is a ceiling embedded air conditioner, also known as ceiling air conditioner, patio air conditioner or embedded air conditioner. It has the advantages of good heating / cooling effect and wide radiation area. It is currently favored by users in large spaces such as shopping malls, large venues, and office buildings. With the improvement of the quality of life, a clean living environment is widely expected by users; however, after a period of use, ceiling air conditioners are prone to dust accumulation on internal parts such as the wind wheel, which in turn causes microbial growth. Especially in the hot and humid environment in summer, cleaning operations for ceiling air conditioners are becoming more and more common.

[0003] Existing ceiling machines usually fix the motor on the chassis, and then install the chassis foam, evaporator, wind wheel assembly, water tray and other structures in sequence. If the wind wheel needs to be cleaned or the motor needs to be repaired, the water tray limiter needs to be removed before the above operations can be performed, resulting in a long process and low efficiency.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The problem solved by the invention is that the unreasonable structure of the existing ceiling fan leads to complicated cleaning and maintenance operations of the wind wheel assembly or the motor and low disassembly and assembly efficiency.

[0006] To solve the above problems, the present invention provides a ceiling machine, comprising a shell, wherein a motor and a wind wheel assembly are sequentially arranged in a cavity formed by the shell, the motor is drivingly connected to the wind wheel assembly, a water receiving tray and an air inlet mesh cover are arranged below the shell, the air inlet mesh cover is detachably connected to the water receiving tray and is concentrically arranged with the wind wheel assembly, and the projection areas of the air inlet mesh cover and the wind wheel assembly on the horizontal plane are S1 and S2 respectively, where S1≥S2.

[0007] The present application can not only sort out the incoming air flow through the air inlet mesh cover, further reducing the operating noise; at the same time, the wind wheel assembly and the motor can be completely exposed by removing the air inlet mesh cover, and the internal wind wheel assembly and motor can be disassembled and assembled without removing the water tray, making the ceiling machine easy to disassemble and assemble, and the cleaning and maintenance operations are efficient; at the same time, the air inlet mesh cover can prevent foreign matter from entering the wind wheel assembly, and can also prevent operators from contacting the rotating wind wheel assembly, making the operation of the ceiling machine safer and more reliable. Preferably, S1=1.05*S2. This setting does not require redesign of the docking water tray, and the modification is small; at the same time, a certain gap is left when the wind wheel assembly is disassembled and assembled, and the disassembly and assembly efficiency is high.

[0008] Preferably, the air inlet mesh cover includes an annular frame, an air guide grille, and a support member, wherein the air guide grille is located between the annular frame and the support member, and an air guide ring is arranged on a side of the annular frame away from the air guide grille, wherein the wind wheel assembly partially extends into the air guide ring, and the maximum area of ​​the circle where the projection of the air guide ring on the horizontal plane lies is S3 and S3<S1.

[0009] This setting can block the gap between the air guide ring and the wind wheel assembly to prevent hands from accidentally touching it; at the same time, the incoming air flow is directed to the wind wheel assembly as much as possible, effectively avoiding air leakage from the gap between the two, with good noise reduction effect, large air volume and low energy consumption.

[0010] Preferably, an avoidance hole is formed on the water receiving tray at a position corresponding to the wind wheel assembly, which is used to limit the assembly of the air inlet mesh cover. A slot is set on the water receiving tray, and the slot is distributed along the outer peripheral side of the avoidance hole. A buckle is set on the edge of the annular frame, and the buckle is limitedly assembled in the slot.

[0011] During assembly, the air inlet mesh cover is embedded in the avoidance hole, and then the air inlet mesh cover is rotated clockwise or counterclockwise so that the buckle is inserted into the slot to complete the assembly. The avoidance hole can ensure that the air inlet mesh cover does not shift during the rotation process, and the disassembly and assembly efficiency is high. There is almost no gap between the air inlet mesh cover and the water receiving tray, and all the air intake airflow passes through the air inlet mesh cover and enters the wind wheel assembly. The air intake mesh cover can be used to comb the air intake airflow, and the noise is small.

[0012] Preferably, the plug buckle includes a connecting portion and an inserting portion, wherein the connecting portion is arranged along the radial direction of the annular frame, and the inserting portion is arranged perpendicular to the connecting portion. This arrangement makes the inserting portion tangent to the edge of the annular frame, and the inserting portion can be inserted into the slot by rotating the air inlet grille, which has a simple structure and is easy to produce and process.

[0013] Preferably, a limiting groove is provided on one side of the plug-in portion, and an assembly hole is provided at a position corresponding to the limiting groove of the slot, and the bolt passes through the assembly hole and is assembled into the limiting groove. This arrangement can lock the slot and the buckle with a bolt, preventing the air inlet grille from vibrating and falling out of the slot during operation, thereby ensuring safe and stable operation.

[0014] Preferably, the air guide grille includes axial air guide strips and radial air guide strips. The axial air guide strips are arranged in a ring shape, and a plurality of the axial air guide strips are concentrically arranged between the annular frame and the support member. The radial air guide strips are arranged radially along the annular frame so that the plurality of axial air guide strips are interconnected. An angle A is formed between the curved surface where the axial air guide strips are located and the central axis of the annular frame, wherein -90°≤A≤90°.

[0015] This setting can sort out the incoming air flow, reduce the obstruction to the air flow, and reduce the air intake noise; it can also prevent debris from entering the ceiling machine and improve the structural strength between adjacent radial air guide strips, thereby strengthening the entire air inlet mesh cover.

[0016] Preferably, the angle formed between the curved surface where the axial air guide strip is located and the central axis of the annular frame gradually changes from the position close to the annular frame to the position close to the support. This arrangement can guide the air near the support to the air guide grille position, avoiding the air being blocked by the support and changing its flow direction, causing airflow turbulence and generating noise.

[0017] Preferably, an angle A1 is formed between the curved surface where the axial wind guide strip is located near the annular frame and the central axis of the annular frame, and an angle A2 is formed between the curved surface where the axial wind guide strip is located near the support member and the central axis of the annular frame, wherein -90°≤A1<0°<A2<45°. This arrangement enables the axial wind guide strips located at the edge and the center to guide wind to the working area of ​​the wind wheel assembly at the same time, and the wind intake is smoother.

[0018] Preferably, the radial wind guide strip is arc-shaped and protrudes toward a side away from the wind wheel assembly, and the radial wind guide strip is arranged higher than the annular frame at one end close to the support member.

[0019] This arrangement can further increase the air intake area of ​​the air intake grille, making the air intake flow smoother; at the same time, the air intake area within the working range of the fan blades close to the wind wheel assembly is larger and the air intake is smoother, thereby reducing the flow resistance of the airflow and the resulting noise.

[0020] Preferably, the air guide ring includes a contraction portion, an extension portion, and an expansion portion which are concentrically arranged and sequentially connected, the diameter of the contraction portion at one end of the annular frame is larger than the diameter at the other end, the expansion portion gradually expands outward from one end close to the extension portion to the other end, and the minimum spacing between the expansion portion and the wind wheel assembly is X1, where the value range of X1 is 0.2-1.5mm.

[0021] This arrangement can utilize the air guide ring to guide the incoming air flow, thereby delivering more incoming air flow to the working area of ​​the wind wheel assembly; and by providing the expansion portion, the incoming air flow entering the wind wheel assembly can be quickly distributed to the entire wind wheel assembly, preventing it from overflowing along the gap between the two, thereby achieving a better air guiding effect; at the same time, it can also prevent the wind wheel assembly from scratching against the air inlet mesh cover during rotation and producing abnormal noise, thereby reducing noise.

[0022] Preferably, the longitudinal cross section of the support is semicircular, and the upper surface of the support is provided with a long strip of notches, and there are a plurality of notches arranged radially along the circumference of the support. This arrangement can avoid turbulence in the middle position to reduce noise; at the same time, the support can be easily grasped by operators to apply force.

[0023] Compared with the prior art, the ceiling machine of the present invention has the following beneficial effects: 1) the ceiling machine can complete the disassembly and assembly of the internal wind wheel assembly and the motor without removing the water tray, so that the ceiling machine is easy to disassemble and assemble, and the cleaning and maintenance operations are efficient; 2) the incoming air flow can be combed to further reduce the operating noise and effectively prevent foreign matter from entering the wind wheel assembly; 3) the structure is simple and easy to produce and process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the ceiling machine according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of an explosion of the ceiling machine according to an embodiment of the present invention;

[0026] Figure 3 This is a first perspective view of the ceiling machine according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A local enlarged schematic diagram of the middle A;

[0028] Figure 5 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0029] Figure 6 This is a schematic diagram of assembling the air inlet grille according to an embodiment of the present invention;

[0030] Figure 7 for Figure 6 A partial enlarged schematic diagram of point C in the middle;

[0031] Figure 8 It is a longitudinal cross-sectional schematic diagram of the ceiling machine according to an embodiment of the present invention;

[0032] Fig. 9 for Figure 8 A partial enlarged schematic diagram of point D in the middle;

[0033] Fig.10 A top view of the air inlet grille according to an embodiment of the present invention;

[0034] Fig.11 A side view of the air inlet grille according to an embodiment of the present invention;

[0035] Fig.12A first viewing angle diagram of the air inlet grille according to an embodiment of the present invention;

[0036] Fig.13 for Fig.12 A partial enlarged schematic diagram of point E in the middle;

[0037] Fig.14 It is an overall schematic diagram of the wind wheel assembly described in an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1-wind wheel assembly; 11-wheel hub; 12-bottom plate; 13-guide ring; 14-blade; 141-grip; 142-notch; 2-motor; 21-motor shaft; 22-sleeve; 3-housing; 4-air inlet grille; 41-annular frame; 411-buckle; 4111-connecting part; 4112-plug-in part; 412-limiting groove; 42-air guide grille; 421-axial air guide strip; 422-radial air guide strip; 43-air guide ring; 431-contraction part; 432-extension part; 433-expansion part; 44-support member; 441-notch; 5-water tray; 51-avoidance hole; 52-slot; 6-evaporator. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that the technical features in the embodiments of the present invention can be combined with each other without conflict.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] Unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. A first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] like Figure 1-14As shown, a ceiling machine comprises a shell 3, in which a motor 2 and a wind wheel assembly 1 are arranged in sequence in a cavity formed by the shell 3, the motor 2 is drivingly connected to the wind wheel assembly 1, a water receiving tray 5 and an air inlet mesh cover 4 are arranged below the shell 3, the air inlet mesh cover 4 is detachably connected to the water receiving tray 5 and is concentrically arranged with the wind wheel assembly 1, and the projection areas of the air inlet mesh cover 4 and the wind wheel assembly 1 on the horizontal plane are S1 and S2 respectively, wherein S1≥S2.

[0044] The present application can not only sort out the incoming air flow through the air inlet mesh cover 4, and further reduce the operating noise; at the same time, the wind wheel assembly 1 and the motor 2 can be completely exposed by removing the air inlet mesh cover 4, and the internal wind wheel assembly 1 and the motor 2 can be disassembled and assembled without removing the water tray 5, so that the ceiling machine is easy to disassemble and assemble, and the cleaning and maintenance operations are efficient; at the same time, the air inlet mesh cover 4 can prevent foreign matter from entering the wind wheel assembly 1, and can also prevent operators from contacting the rotating wind wheel assembly 1, making the operation of the ceiling machine safer and more reliable. Preferably, S1=1.05*S2. This setting does not require redesigning the docking water tray 5, and the modification is small; at the same time, a certain gap is left when the wind wheel assembly 1 is disassembled and assembled, and the disassembly and assembly efficiency is high.

[0045] An evaporator 6 is also provided in the housing 3. The evaporator 6 is located outside the wind wheel assembly 1 and is used for heat exchange between the refrigerant and the airflow. Its specific structure and assembly relationship are prior arts and will not be described in detail here.

[0046] As a preferred example of the present invention, the air inlet grille 4 includes an annular frame 41, an air guide grille 42, and a support 44, wherein the air guide grille 42 is located between the annular frame 41 and the support 44, and an air guide ring 43 is arranged on the side of the annular frame 41 away from the air guide grille 42, wherein a portion of the wind wheel assembly 1 extends into the air guide ring 43, and a projection of the air guide ring 43 on the horizontal plane is S3 and S3<S1.

[0047] The air inlet mesh cover 4 described in the present application can cover the gap between the air guide ring 43 and the wind wheel assembly 1 to prevent hands from accidentally touching it; at the same time, the incoming air flow is directed into the wind wheel assembly 1 as much as possible, effectively avoiding air leakage from the gap between the two, with good noise reduction effect, large air delivery volume and low energy consumption.

[0048] As an example of the present invention, a avoidance hole 51 is formed on the water receiving tray 5 at a position corresponding to the wind wheel assembly 1, which is used for limiting the assembly of the air inlet grille 4. A slot 52 is provided on the water receiving tray 5, and the slot 52 is distributed along the outer peripheral side of the avoidance hole 51. A buckle 411 is provided on the edge of the annular frame 41, and the buckle 411 is limitedly assembled into the slot 52. When assembling, the air inlet grille 4 is inserted into the avoidance hole 51, and then the air inlet grille 4 is rotated clockwise or counterclockwise so that the buckle 411 is inserted into the slot 52 to complete the assembly. The avoidance hole 51 can ensure that the air inlet grille 4 does not deviate during the rotation process, and the disassembly and assembly efficiency is high; there is almost no gap between the air inlet grille 4 and the water receiving tray 5, and all the air inlet air flows through the air inlet grille 4 into the wind wheel assembly 1. The air inlet grille 4 can be used to comb the air inlet air flow, and the noise is small.

[0049] Preferably, there are 4-8 buckles 411 and they are evenly spaced along the circumference of the annular frame 41. After the ceiling is installed, the weight of the entire air inlet grille 4 is applied to the water tray 5 through the buckles 411. This arrangement can take into account both the tightness and reliability of the assembly. Preferably, the buckles 411 are arranged higher than the annular frame 41 and the two are integrally formed. This arrangement allows the entire air inlet grille 4 to be completely embedded in the avoidance hole 51. The assembled ceiling has simple lines, giving people a good visual sense.

[0050] As a preferred example of the present invention, the plug buckle 411 includes a connecting portion 4111 and a plug-in portion 4112. The connecting portion 4111 is arranged along the radial direction of the annular frame 41, and the plug-in portion 4112 is arranged perpendicular to the connecting portion 4111. This arrangement makes the plug-in portion 4112 tangent to the edge of the annular frame 41, and the plug-in portion 4112 can be embedded in the slot 52 by rotating the air inlet grille 4. The structure is simple and easy to produce and process. Preferably, the minimum distance between the plug-in portion 4112 and the annular frame 41 is M1, and the diameter of the annular frame 41 is M2, where M1 = (0.02-0.05) * M2. The arrangement is compact in structure and is firmly and securely assembled with the water tray 5.

[0051] Preferably, a limiting groove 412 is provided on one side of the plug-in portion 4112, and an assembly hole is provided at a position corresponding to the slot 52 and the limiting groove 412, and a bolt is inserted through the assembly hole and then assembled into the limiting groove 412. This arrangement can lock the slot 52 and the buckle 411 with one bolt, preventing the air inlet grille 4 from vibrating and falling out of the slot 52 during operation, thereby ensuring safe and stable operation.

[0052] As a preferred embodiment of the present invention, the air guide grille 42 includes axial air guide strips 421 and radial air guide strips 422. The axial air guide strips 421 are arranged in a ring shape, and multiple axial air guide strips 421 are concentrically arranged between the annular frame 41 and the support member 44. The radial air guide strips 422 are arranged radially along the annular frame 41 so that the multiple axial air guide strips 421 are interconnected. An angle A is formed between the curved surface where the axial air guide strips 421 are located and the central axis of the annular frame 41, wherein -90°≤A≤90°.

[0053] The air guide grille 42 described in the present application can comb the incoming air flow by setting axial air guide strips 421, reduce the obstruction to the air flow, and reduce the air intake noise; in addition, it can prevent debris from entering the interior of the ceiling and improve the structural strength between adjacent radial air guide strips 422, so that the entire air inlet mesh cover 4 is strengthened.

[0054] As a preferred example of the present invention, the radial wind guide strip 422 is arc-shaped and protrudes toward the side away from the wind wheel assembly 1, and the end of the radial wind guide strip 422 close to the support member 44 is higher than the annular frame arrangement 41. This arrangement can further increase the air intake area of ​​the air intake grille 4, making the air intake flow smoother; at the same time, the air intake area is larger within the working range of the fan blade 14 close to the wind wheel assembly 1, and the air intake is smoother, thereby reducing the flow resistance of the air flow and the noise generated thereby.

[0055] As a preferred example of the present invention, the angle formed between the curved surface where the axial air guide strip 421 is located and the central axis of the annular frame 41 gradually changes from the position close to the annular frame 41 to the position of the support 44. This setting can guide the air near the support 44 to the position of the air guide grille 42, avoiding the air being blocked by the support 44 and changing the flow direction, causing airflow turbulence and generating noise.

[0056] Preferably, an angle A1 is formed between the curved surface where the axial wind guide strip 421 is located near the annular frame 41 and the central axis of the annular frame 41, and an angle A2 is formed between the curved surface where the axial wind guide strip 421 is located near the support member 44 and the central axis of the annular frame 41, wherein -90°≤A1<0°<A2<45°. This arrangement enables the axial wind guide strips 421 located at the edge and the center to guide wind to the working area of ​​the wind wheel assembly 1 at the same time, and the wind intake is smoother.

[0057] Preferably, the angle between the curved surface of the axial air guide strip 421 at the highest point of the radial air guide strip 422 and the central axis of the annular frame 41 is 0°. This setting makes the radial air guide strip 422 at the largest air inlet area at the position corresponding to the wind wheel assembly 1 have the best air guiding effect and the minimum air flow resistance.

[0058] As an example of the present invention, the air guide ring 43 includes a contraction portion 431, an extension portion 432, and an expansion portion 433 which are concentrically arranged and sequentially connected. The diameter of the contraction portion 431 at one end of the annular frame 41 is larger than the diameter at the other end. The expansion portion 433 gradually expands outward from one end close to the extension portion 432 to the other end. The minimum spacing between the expansion portion 433 and the wind wheel assembly 1 is X1, where the value range of X1 is 0.2-1.5mm.

[0059] This arrangement can utilize the air guide ring 43 to guide the incoming air flow, thereby delivering more incoming air flow to the working area of ​​the wind wheel assembly 1; and by providing the expansion portion 433, the incoming air flow entering the wind wheel assembly 1 can be quickly distributed to the entire wind wheel assembly 1 to prevent it from overflowing along the gap between the two, thereby achieving a better air guiding effect; at the same time, it can also prevent the wind wheel assembly 1 from scratching against the air inlet mesh cover 4 during rotation and generating abnormal noise, thereby reducing noise.

[0060] As an example of the present invention, the longitudinal cross section of the support member 44 is semicircular, and the upper surface of the support member 44 is provided with a long strip of notches 441, and there are a plurality of notches 441 arranged radially along the circumference of the support member 44. By providing the support member 44, turbulence can be avoided in the middle position to reduce noise; at the same time, by providing the support member 44, it is convenient for operators to grab and apply force.

[0061] As a preferred example of the present invention, a shaft sleeve 22 is fixedly assembled on a side of the wind wheel assembly 1 away from the motor 2, and the motor 2 includes a motor shaft 21, and the motor shaft 21 is arranged through the shaft sleeve 22. An assembly hole is arranged on the side of the shaft sleeve 22, and a locking piece is installed in the assembly hole. The locking piece passes through the assembly hole and abuts against the motor shaft 21 to realize the driving connection between the motor 2 and the wind wheel assembly 1.

[0062] This arrangement can realize the driving connection between the motor 2 and the wind wheel assembly 1 through a locking piece, requiring fewer parts, and the end of the motor shaft 21 does not need to be flattened, avoiding the alignment of the flattened part during the installation process, greatly improving the assembly efficiency. The motor 2 is fixedly assembled on the housing 3, and the assembly relationship between the two is the prior art and will not be repeated here.

[0063] Preferably, the central axis of the assembly hole is perpendicular to the central axis of the motor shaft 21. Preferably, the free end of the bolt is interference-fitted with the side wall of the motor shaft 21, and the interference is greater than 0.5 mm. This arrangement makes it difficult for the motor shaft 21 to slip when the motor 2 drives the wind wheel assembly 1 to rotate, and can take into account both assembly difficulty and transmission reliability.

[0064] As an example of the present invention, the wind wheel assembly 1 includes a hub 11, a base plate 12, and a guide ring 13. The lower edge of the hub 11 extends to form the base plate 12. The base plate 12 is provided with a fan blade 14. The fan blade 14 is plugged into the base plate 12. The upper end of the fan blade 14 is plugged into the guide ring 13. The guide ring 13 partially extends into the guide ring 43. When the motor 2 drives the wind wheel assembly 1 to rotate, air enters from the air inlet of the guide ring 13 and finally exits from the air outlet 15, thereby realizing the circulation of airflow. Preferably, the distance that the guide ring 13 extends into the guide ring 43 is 1-6mm. This setting can make the overall structure of the ceiling machine compact and have a good wind guiding effect.

[0065] An air outlet is formed between the base plate 12, the guide ring 13 and the fan blade 14. As a preferred example of the present application, the base plate 12 is provided with blade slots for installing and fixing the fan blade 14; the blade slots are evenly spaced along the circumference of the base plate 12. Preferably, the two ends of the fan blade 14 are respectively snap-fitted and assembled with the base plate 12 and the guide ring 13. This arrangement enables the fan blade 14, the base plate 12 and the guide ring 13 to be detachable, which facilitates the maintenance and assembly of the wind wheel assembly 1; of course, the fan blade 14 can also be fixed to the base plate 12 and the guide ring 13 by bonding to ensure a secure assembly.

[0066] As a preferred example of the present application, the hub 11 is partially protruding from the guide ring 13, the sleeve 22 is fixedly mounted on the hub 11 and is located above the guide ring 13, and the minimum distance M1 between the sleeve 22 and the guide ring 13 is 30-50 mm. This arrangement is convenient to operate and is easy to achieve locking with the motor shaft 21 and the wind wheel assembly 1.

[0067] As a preferred example of the present invention, the fan blade 14 includes a fan blade shell consisting of a windward surface and a leeward surface, and a latch 141 is provided on the trailing edge of the fan blade shell. The latch 141 can stabilize the airflow at the air outlet, and cooperate with the air inlet mesh cover 4 to further reduce the airflow noise of the ceiling machine, thereby improving the user experience.

[0068] Preferably, a notch 142 is provided on the trailing edge of the fan blade housing, and the notch 142 is located below the latching teeth 141. By providing the notch 142, the airflow noise is further reduced, the noise performance of the device is improved, and the user experience is enhanced.

[0069] The width, height H3, and thickness of the notch 142 are 16mm to 25mm, 8mm-38mm, and 1-2.5mm, respectively. Studies have found that the specific parameters and proportional relationship of the notch 142 have an impact on noise control. After simulation and experimental measurements, limiting the parameters within the above-defined range can achieve better results. On the one hand, the fan blade 14 finally formed can have a larger air output, ensuring the working efficiency of the fan blade 14. On the other hand, this setting helps to reduce airflow noise, and the wind noise can also be effectively controlled, thereby achieving a balance between noise control and the performance requirements of the fan blade 14. Preferably, there are multiple latch teeth 141 and they are arranged in sequence from top to bottom along the trailing edge of the fan blade housing. The height H4 of the latch teeth 141 is 100-150mm, wherein H3:H4=(3-18):1. This setting can minimize the operating noise of the wind wheel assembly 1.

[0070] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A ceiling machine, comprising a housing (3), wherein a motor (2) and a wind wheel assembly (1) are sequentially arranged in a cavity formed by the housing (3), wherein the motor (2) is drivingly connected to the wind wheel assembly (1), and wherein: A water receiving tray (5) and an air inlet mesh cover (4) are arranged below the housing (3); the air inlet mesh cover (4) is detachably connected to the water receiving tray (5) and is arranged concentrically with the wind wheel assembly (1); the projected areas of the air inlet mesh cover (4) and the wind wheel assembly (1) on a horizontal plane are S1 and S2, respectively, where S1≥S2.

2. The ceiling machine according to claim 1, characterized in that: The air inlet grille (4) comprises an annular frame (41), an air guide grille (42), and a support member (44); the air guide grille (42) is located between the annular frame (41) and the support member (44); an air guide ring (43) is arranged on a side of the annular frame (41) away from the air guide grille (42); a portion of the wind wheel assembly (1) extends into the air guide ring (43); the maximum area of ​​the circle where the projection of the air guide ring (43) on a horizontal plane lies is S3, and S3 is less than S1.

3. The ceiling machine according to claim 2, characterized in that: A avoidance hole (51) is formed on the water receiving tray (5) at a position corresponding to the wind wheel assembly (1) for limiting the assembly of the air inlet grille (4); a slot (52) is provided on the water receiving tray (5); the slot (52) is distributed along the outer circumference of the avoidance hole (51); a buckle (411) is provided on the edge of the annular frame (41); the buckle (411) is limitedly assembled in the slot (52).

4. The ceiling machine according to claim 3, characterized in that: The plug buckle (411) comprises a connecting portion (4111) and an inserting portion (4112); the connecting portion (4111) is arranged along the radial direction of the annular frame (41), and the inserting portion (4112) is arranged perpendicular to the connecting portion (4111).

5. The ceiling machine according to claim 4, characterized in that: A limiting groove (412) is provided on one side of the plug-in portion (4112), and an assembly hole is provided at a position of the slot (52) corresponding to the limiting groove (412), and a bolt is inserted through the assembly hole and assembled into the limiting groove (412).

6. The ceiling machine according to claim 2, characterized in that: The air guide grille (42) comprises an axial air guide strip (421) and a radial air guide strip (422); the axial air guide strip (421) is arranged in an annular shape; a plurality of the axial air guide strips (421) are concentrically arranged between the annular frame (41) and the support member (44); the radial air guide strips (422) are arranged radially along the annular frame (41) so that the plurality of axial air guide strips (421) are interconnected; an angle A is formed between the curved surface where the axial air guide strip (421) is located and the central axis of the annular frame (41), wherein -90°≤A≤90°.

7. The ceiling machine according to claim 6, characterized in that: The angle formed between the curved surface where the axial air guide strip (421) is located and the central axis of the annular frame (41) gradually changes from a position close to the annular frame (41) to a position close to the support member (44).

8. The ceiling machine according to claim 6, characterized in that: The radial wind guide strip (422) is arc-shaped and is arranged to protrude toward a side away from the wind wheel assembly (1); the radial wind guide strip (422) is higher than the annular frame arrangement (41) at one end close to the support member (44).

9. The ceiling machine according to claim 2, characterized in that: The air guide ring (43) comprises a contraction portion (431), an extension portion (432), and an expansion portion (433) which are concentrically arranged and sequentially connected, the diameter of the contraction portion (431) at one end of the annular frame (41) being larger than the diameter at the other end, the expansion portion (433) gradually expands outward from one end close to the extension portion (432) to the other end, and the minimum spacing between the expansion portion (433) and the wind wheel assembly (1) is X1, wherein the value range of X1 is 0.2-1.5 mm.

10. The ceiling machine according to claim 2, characterized in that: The longitudinal cross section of the support member (44) is semicircular, and the upper surface of the support member (44) is provided with a long strip-shaped notch (441), and there are a plurality of the notch (441) which are radially arranged along the circumference of the support member (44).

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