Integrated air conditioner

Abstract

The present invention provides an integrated air conditioner, comprising: a housing, the interior of which is divided into an indoor side and an outdoor side, the housing on the indoor side is provided with an indoor air inlet and an indoor air outlet, and the housing on the outdoor side is provided with an outdoor air inlet and an outdoor air outlet; and a laminar flow fan, which is arranged in the indoor side and forms an air inlet channel; wherein indoor air reaches the air inlet channel through the indoor air inlet, the laminar flow fan disturbs the indoor air entering the air inlet channel through the fluid viscosity effect to form laminar wind, and the laminar wind is discharged from the housing through the indoor air outlet to reach the indoor room. The integrated air conditioner of the present invention has low noise and good user experience.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, in particular to an integrated air conditioner. Background Art

[0002] Traditional integrated air conditioners are generally cross-flow air supply systems or centrifugal air supply systems, and the air outlet direction is straight ahead. Although there are air guide plates for left and right air flow and louvers for up and down air flow, it is limited by the volute structure. The left and right air supply angles are less than 80°, the up and down air supply angles are less than 100°, and there is only one air outlet, so its air supply range is very limited. At the same time, due to the use of long strip air outlets, the phenomenon of air blowing directly on people is quite serious. In addition, in the current cross-flow fan air supply system and centrifugal air supply system, the blades periodically impact the airflow, which will produce obvious rotational noise. The volute cooperates with the fan to achieve the air supply effect, and it will also impact the airflow at the volute tongue, producing strong turbulent noise. Under the limitation of performance indicators, the noise value is close to the limit, and it is difficult to significantly improve the noise quality under the existing technology. Summary of the invention

[0003] An object of the present invention is to provide an integrated air conditioner with low noise during air supply, high air volume and high air pressure.

[0004] A further object of the present invention is to achieve 360° uniform air supply on the indoor side of the integrated air conditioner, thereby improving the user experience of the integrated air conditioner.

[0005] In particular, the present invention provides an integrated air conditioner, comprising:

[0006] A shell, the interior of which is divided into an indoor side and an outdoor side, the shell on the indoor side is provided with an indoor air inlet and an indoor air outlet, and the shell on the outdoor side is provided with an outdoor air inlet and an outdoor air outlet; and

[0007] The laminar flow fan is arranged inside the room and forms an air inlet channel. The indoor air reaches the air inlet channel through the indoor air inlet. The laminar flow fan disturbs the indoor air entering the air inlet channel through the fluid viscosity effect to form laminar wind. The laminar wind is discharged from the shell through the indoor air outlet and reaches the room.

[0008] Optionally, the housing on the indoor side is provided with indoor air outlets surrounding the laminar flow fan.

[0009] Optionally, the integrated air conditioner further comprises:

[0010] The first heat exchanger is arranged on the indoor side and is used for performing heat exchange with the indoor air entering the indoor side through the indoor air inlet. The indoor air after heat exchange by the first heat exchanger reaches the air inlet channel.

[0011] Optionally, the integrated air conditioner further comprises:

[0012] an air supply fan, arranged outdoors; and

[0013] The second heat exchanger is arranged at the outdoor side and is used for exchanging heat with the outdoor air entering the outdoor side through the outdoor air inlet;

[0014] The air supply fan drives the outdoor air to pass through the outdoor air inlet, and after heat exchange in the second heat exchanger, it is discharged from the shell through the outdoor air outlet to the outside.

[0015] Optionally, the air supply fan is a centrifugal fan.

[0016] Optionally, the first heat exchanger is an evaporator and the second heat exchanger is a condenser;

[0017] The integrated air conditioner also includes: a compressor for compressing the refrigerant;

[0018] The condenser is used to condense the refrigerant from the compressor;

[0019] The evaporator is connected to the condenser correspondingly to return the refrigerant to the compressor.

[0020] Optionally, the laminar flow fan comprises:

[0021] A laminar flow fan comprises a plurality of annular discs, which are arranged in parallel and spaced apart from each other, have the same central axis and the centers jointly form an air inlet channel, and indoor air enters the air inlet channel and reaches the gaps between the plurality of annular discs; and

[0022] The motor is configured to drive the multiple annular discs to rotate, so that the air boundary layer close to the surfaces of the multiple annular discs is driven by the rotating multiple annular discs to rotate from inside to outside to form laminar wind.

[0023] Optionally, the laminar flow fan further comprises:

[0024] A driving disk is arranged in parallel with the plurality of annular disks at intervals; and

[0025] A connecting member, which penetrates through the driving disc and the plurality of annular discs to connect the plurality of annular discs to the driving disc;

[0026] The motor is configured to directly drive the driving disc to rotate, and then the driving disc drives the plurality of annular discs to rotate.

[0027] Optionally, the connecting member is a blade, and the cross section of the blade has a double arc convex toward the direction of rotation of the annular disk, including an inner arc and a back arc sequentially arranged along the direction of rotation of the annular disk; wherein,

[0028] The inner arc and the back arc have different centers and intersect at both ends, or

[0029] The inner arc and the back arc have the same center and are arranged in parallel.

[0030] Optionally, the annular disc is arranged according to one or more of the following structures:

[0031] The distance between two adjacent annular discs gradually increases along the direction of the airflow in the air inlet channel;

[0032] The inner diameters of the plurality of annular discs gradually decrease along the direction in which the air flows in the air inlet passage;

[0033] Each annular disc is an arc-shaped disc that gradually approaches the driving disc from the inside to the outside.

[0034] The integrated air conditioner of the present invention arranges a laminar flow fan in a shell on the indoor side, and utilizes the laminar flow fan to disturb the indoor air through the fluid viscosity effect to achieve laminar air supply. The air supply process has low noise, high air volume and high air pressure, which effectively improves the user experience of the integrated air conditioner.

[0035] Furthermore, the integrated air conditioner of the present invention is provided with indoor air outlets around the laminar flow fan in the indoor shell, so that air is discharged from all sides, the air outlet range is increased, and 360° uniform air supply is achieved.

[0036] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0038] Figure 1 is a schematic perspective view of an integrated air conditioner according to an embodiment of the present invention.

[0039] Figure 2 yes Figure 1 A schematic three-dimensional view of the integrated air conditioner from another angle.

[0040] Figure 3 yes Figure 1 A schematic exploded view of an integrated air conditioner is shown.

[0041] Figure 4 yes Figure 1 A schematic top view of some components of an integrated air conditioner is shown.

[0042] Figure 5is a schematic perspective view of an integrated air conditioner according to another embodiment of the present invention.

[0043] Figure 6 is a schematic perspective view of an integrated air conditioner according to yet another embodiment of the present invention.

[0044] Figure 7 yes Figure 6 A schematic top view of some components of an integrated air conditioner is shown.

[0045] Figure 8 1 is a schematic three-dimensional diagram of an evaporator and a water receiving tray of an integrated air conditioner according to an embodiment of the present invention.

[0046] Fig. 9 1 is a schematic three-dimensional diagram of a bottom cover and a water receiving tray of an integrated air conditioner according to an embodiment of the present invention.

[0047] Fig.10 4 is a schematic three-dimensional diagram of a wind shield of an integrated air conditioner according to an embodiment of the present invention.

[0048] Fig.11 is a schematic perspective view of a fixing plate of an integrated air conditioner according to an embodiment of the present invention.

[0049] Fig.12 FIG. 1 is a schematic perspective view of a laminar flow fan of a laminar flow fan of an air conditioner according to an embodiment of the present invention.

[0050] Fig.13 yes Figure 1 Schematic diagram of the air supply principle of the laminar flow fan of the air conditioner shown.

[0051] Fig.14 yes Figure 1 The velocity distribution and force distribution diagram of the laminar flow fan of the air conditioner shown.

[0052] Fig.15 yes Fig.12 A schematic cross-sectional view of a laminar flow fan is shown.

[0053] Fig.16 yes Fig.12 A schematic perspective view of the laminar flow fan from another perspective is shown.

[0054] Fig.17 yes Fig.12 A schematic perspective view of a laminar flow fan from yet another perspective is shown.

[0055] Fig.18 The figure is a schematic cross-sectional view of the cooperation among the fixing mechanism, the motor and the laminar flow fan of the air conditioner according to one embodiment of the present invention.

[0056] Fig.19is a schematic exploded view of a motor and a fixing mechanism of an air conditioner according to an embodiment of the present invention.

[0057] Fig. 20 is a schematic front view of a laminar flow fan of an air conditioner according to an embodiment of the present invention.

[0058] Fig.21 yes Fig. 20 A schematic perspective view of the laminar flow fan from another perspective is shown.

[0059] Fig. 22 yes Fig. 20 Schematic diagram of air circulation of laminar flow fan shown.

[0060] Fig.23 yes Fig. 20 A schematic cross-sectional view of a laminar flow fan is shown.

[0061] Fig.24 yes Fig. 20 The diagram shown is a schematic diagram of the relationship between the chord length of the laminar flow fan blades and the air volume and air pressure.

[0062] Fig.25 The figure is a cross-sectional schematic diagram of a laminar flow fan of an air conditioner according to an embodiment of the present invention, wherein the laminar flow fan has double arc blades.

[0063] Fig.26 This is a schematic diagram of the relationship between the installation angle of the double arc blades and the air volume and air pressure.

[0064] Fig. 27 FIG. 1 is a cross-sectional schematic diagram of a laminar flow fan of an air conditioner according to an embodiment of the present invention having aerospace blades.

[0065] Fig.28 This is a schematic diagram of the relationship between the installation angle of aviation blades and the wind volume and wind pressure.

[0066] Fig.29 1 is a schematic front view of a laminar flow fan of an air conditioner according to an embodiment of the present invention, in which the spacing between the annular disks of the laminar flow fan gradually changes.

[0067] Fig.30 yes Fig.29 A schematic perspective view of a laminar flow fan is shown.

[0068] Fig.31 yes Fig.29 The diagram shows the relationship between the gradual change in the spacing between multiple annular disks of a laminar flow fan and the air volume and pressure.

[0069] Fig.32 The figure is a schematic cross-sectional view of a laminar flow fan with a gradually changing inner diameter of an annular disk of a laminar flow fan of an air conditioner according to an embodiment of the present invention.

[0070] Fig.33 yes Fig.32 The diagram shown is a schematic diagram of the relationship between the gradual change in the inner diameters of multiple annular disks of a laminar flow fan and the air volume and air pressure.

[0071] Fig.34 It is a schematic diagram of the central angle of a line connecting the inner and outer diameters of a laminar flow fan of an air conditioner in which the annular disks are arc-shaped disks on the same longitudinal section passing through the central axis according to an embodiment of the present invention.

[0072] Fig.35 yes Fig.34 Schematic diagram of the relationship between the central angle of the laminar flow fan and the air volume and air pressure. DETAILED DESCRIPTION

[0073] Figure 1 is a schematic perspective view of an integrated air conditioner 100 according to an embodiment of the present invention. Figure 2 yes Figure 1 A schematic three-dimensional view of the integrated air conditioner 100 from another angle is shown. Figure 3 yes Figure 1 A schematic exploded view of an integrated air conditioner 100 is shown. Figure 4 yes Figure 1 Schematic top view of some components of the integrated air conditioner 100 shown. The integrated air conditioner 100 of the embodiment of the present invention is a window air conditioner, which generally includes a housing 200 and a laminar flow fan 110. The interior of the housing 200 is divided into an indoor side 210 and an outdoor side 220. The housing 200 on the indoor side 210 is provided with an indoor air inlet 211 and an indoor air outlet 212, and the housing 200 on the outdoor side 220 is provided with an outdoor air inlet 221 and an outdoor air outlet 222. The laminar flow fan 110 is arranged in the indoor side 210, and an air inlet channel is formed at the center thereof; wherein the indoor air reaches the air inlet channel through the indoor air inlet 211, and the laminar flow fan 110 disturbs the indoor air entering the air inlet channel through the fluid viscosity effect to form laminar wind, and the laminar wind is discharged from the housing 200 through the indoor air outlet 212 to reach the room. The integrated air conditioner 100 of the embodiment of the present invention disposes a laminar flow fan 110 in a shell 200 on the indoor side 210, and utilizes the laminar flow fan 110 to disturb the indoor air through the fluid viscosity effect to achieve laminar air supply. The air supply process has low noise, high air volume, and high wind pressure. It has a novel appearance and good functions, which can significantly improve the user experience.

[0074] In some embodiments, the housing 200 of the indoor side 210 of the integrated air conditioner 100 of the embodiment of the present invention is provided with an indoor air outlet 212 around the laminar flow fan 110. The integrated air conditioner 100 of the embodiment of the present invention is provided with an indoor air outlet 212 around the laminar flow fan 110 on the housing 200 of the indoor side 210, so that air is discharged from all sides, the air outlet range is increased, and the air outlet can be prevented from blowing directly on the user, thereby achieving 360° uniform air supply. When the air guide plate 213 is used for air flow guidance, the air outlet can be prevented from blowing directly on the user, thereby achieving a good air supply effect.

[0075] In some embodiments, the integrated air conditioner 100 of the embodiment of the present invention further includes: a first heat exchanger, which is arranged on the indoor side 210, and is used to perform heat exchange with the indoor air entering the indoor side 210 through the indoor air inlet 211, and the indoor air after heat exchange by the first heat exchanger reaches the air inlet channel. The indoor air enters from the indoor air inlet 211, undergoes heat exchange by the first heat exchanger, and is turned 90° in the laminar flow fan 110 before being discharged from the circumferential direction of the laminar flow fan 110.

[0076] In some embodiments, the integrated air conditioner 100 of the embodiment of the present invention further includes: an air supply fan 600 and a second heat exchanger. The air supply fan 600 is disposed on the outdoor side 220. The second heat exchanger is disposed on the outdoor side 220 and is used to perform heat exchange with outdoor air entering the outdoor side 220 through the outdoor air inlet 221. The air supply fan 600 drives the outdoor air to pass through the outdoor air inlet 221 and, after heat exchange in the second heat exchanger, is discharged from the housing 200 through the outdoor air outlet 222 to reach the outdoors. Preferably, the air supply fan 600 is a centrifugal fan 610.

[0077] In some embodiments, the first heat exchanger of the integrated air conditioner 100 of the embodiment of the present invention is the evaporator 120, and the second heat exchanger is the condenser 700. The integrated air conditioner 100 of the embodiment of the present invention further includes: a compressor 140 for compressing the refrigerant; a condenser 700 for condensing the refrigerant from the compressor 140; and the evaporator 120 and the condenser 700 are connected correspondingly to return the refrigerant to the compressor 140.

[0078] Figure 1 is a schematic perspective view of an integrated air conditioner 100 according to an embodiment of the present invention. Figure 5 1 is a schematic three-dimensional diagram of an integrated air conditioner 100 according to another embodiment of the present invention. In one embodiment, the integrated air conditioner 100 of the embodiment of the present invention includes: a housing 200, a partition 160, an evaporator 120, a water receiving tray 130, a purification mechanism 800, a laminar flow fan 110, a fixing mechanism 401, a wind shield 500, a wind guide plate 213, a compressor 140, an electrical box 150, a double-suction centrifugal fan 610, a volute 611 and two condensers 700.

[0079] The shell 200 includes a left cover plate 203 and a right cover plate 204. The shell body is a split structure, including an upper shell 201 and a bottom shell 202, having a front side, an upper side, a rear side and a lower side, and having openings on the left and right sides thereof. The left cover plate 203 closes the opening on the left side, and the right cover plate 204 closes the opening on the right side. The partition 160 is longitudinally arranged in the shell body, and the left cover plate 203, the left part of the upper shell 201 and the bottom shell 202, and the partition plate 160 define an indoor side 210, and the partition plate 160, the right part of the upper shell 201 and the bottom shell 202, and the right cover plate 204 define an outdoor side 220.

[0080] On the indoor side 210, the evaporator 120, the purification mechanism 800, the laminar flow fan 110 and the fixing mechanism are arranged in sequence from left to right.

[0081] The evaporator 120 is used to evaporate the refrigerant in a low-temperature and low-pressure state to exchange heat with the indoor air and generate condensed water. The matching evaporator 120 is provided with a water receiving tray 130. The water receiving tray 130 is arranged on the bottom shell 202, located at the bottom of the evaporator 120, and is used to receive condensed water. The evaporator 120 can be a straight-plate evaporator 121, a V-shaped evaporator 122, or other types of evaporators. In some embodiments, the evaporator 120 is a straight-plate evaporator 121 with a square cross-section; the water receiving tray 130 has a square groove matching the cross-section of the straight-plate evaporator 121. In other embodiments, the evaporator 120 is a V-shaped evaporator 122 with a V-shaped cross-section; the V-shaped evaporator 122 has two side surfaces and a tip formed by the intersection of the two side surfaces, and the distance from the tip to the laminar flow fan 110 is greater than the distance from the two side surfaces to the laminar flow fan 110; the water receiving tray 130 has a V-shaped groove matching the cross-section of the V-shaped evaporator 122. Figure 8 1 is a schematic perspective view of an evaporator 120 and a water receiving tray 130 of an integrated air conditioner 100 according to an embodiment of the present invention. Fig. 9 1 is a schematic three-dimensional diagram of the bottom cover and the water receiving tray 130 of the integrated air conditioner 100 according to an embodiment of the present invention. The water receiving tray 130 can be fixed on the bottom shell 202 by setting a positioning column 131 on the bottom shell 202. The use of the V-shaped evaporator 122 can maximize the heat exchange area in a limited space, increase the heat exchange area, and improve the efficiency of the whole machine. The V-shaped angle can be 90-175 degrees, for example, 90-120 degrees, 120-150 degrees, and for example, 110 degrees, 140 degrees, and 115 degrees.

[0082] The indoor air inlet 211 of the integrated air conditioner 100 of the embodiment of the present invention may include: a first air inlet 231 opened on the left cover plate 203, and a second air inlet 232 opened on the upper shell 201 and / or the bottom shell 202 between the left cover plate 203 and the evaporator 120. In addition, the first air inlet 231 is preferably a microporous air inlet, and the second air inlet 232 is preferably a long strip hole. A plurality of air guide plates 213 are preferably provided at the second air inlet 232. The wind can be prevented from blowing directly on the user by guiding the air outlet by the air guide plates 213. In order to increase the air intake and improve the air supply efficiency, it is preferred to open the indoor air inlet 211 on the left cover plate 203 and the upper shell 201 and the bottom shell 202 between the left cover plate 203 and the evaporator 120.

[0083] The purification mechanism 800 is used to filter the air flowing through so as to output clean and healthy air to the room, and includes a flexible purification block 801 and a purification bracket 802. The flexible purification block 801 is used to filter the indoor air and is a compressible soft material. The purification bracket 802 is longitudinally arranged in the shell body, and the flexible purification block 801 is filled and fixed in the bracket. The flexible purification block 801 is inserted into the purification bracket 802 by extrusion, which is very convenient.

[0084] The laminar flow fan 110 has an air inlet passage 302 formed at the center thereof, and is configured to disturb the indoor air entering the air inlet passage 302 by fluid viscosity effect to form laminar flow. The laminar flow fan 110 includes a laminar flow fan 300 and a motor 400. Fig.12 It is a schematic stereogram of a laminar flow fan 300. The laminar flow fan 300 includes a plurality of annular discs 301, which are arranged in parallel and spaced apart from each other, have the same central axis and the centers jointly form an air inlet channel 302, and the indoor air enters the air inlet channel 302 and reaches the gaps between the plurality of annular discs 301. The motor 400 is connected to the laminar flow fan 300, and is configured to drive the plurality of annular discs 301 to rotate, so that the air boundary layer 304 near the surface of the plurality of annular discs 301 is driven by the rotating plurality of annular discs 301 to rotate from the inside to the outside to form a laminar wind. The air boundary layer 304 is a very thin air layer near the surface of each disc.

[0085] Fig.13 Schematic diagram of the air supply principle of the laminar flow fan 110. The motor 400 drives the multiple annular discs 301 to rotate at high speed, and the air in the intervals between the annular discs 301 contacts and moves with each other. Then, the air boundary layer 304 close to the surface of each annular disc 301 is driven by the rotating annular disc 301 to rotate from inside to outside to form laminar wind due to the viscous shear force τ. Fig.141 is a velocity distribution and force distribution diagram of the laminar flow fan 110 of the integrated air conditioner 100 according to the embodiment of the present invention, and is a schematic diagram of the viscous shear force distribution τ(y) and velocity distribution u(y) on the air boundary layer 304. The viscous shear force on the air boundary layer 304 is actually the resistance generated by each disk on the air boundary layer 304. Fig.14 The horizontal axis in refers to the distance in the moving direction of the air boundary layer 304, and the vertical axis refers to the height of the air boundary layer 304 in the direction perpendicular to the moving direction. e is the air velocity at each point in the air boundary layer 304, δ is the thickness of the air boundary layer 304, τ w is the viscous shear force on the surface of the annular disk 301. The variable y in τ(y) and u(y) refers to the height of the cross section of the air boundary layer 304 in the direction perpendicular to the moving direction, and L is the distance between a certain point on the inner circumference of the annular disk 301 and a certain point on the surface of the annular disk 301. Then τ(y) is the distribution of the viscous shear force when the height of the cross section of the air boundary layer 304 is y at the distance L; u(y) is the velocity distribution when the height of the cross section of the air boundary layer 304 is y at the distance L.

[0086] The indoor air outlet 212 of the integrated air conditioner 100 of the embodiment of the present invention is opened on one or several sides of the upper shell 201 and / or the bottom shell 202 around the laminar fan 300. In some embodiments, indoor air outlets 212 are opened on the four sides of the shell body to form a 360-degree air outlet. In some embodiments, a wind shield 500 is arranged between the laminar fan 300 and the shell body. There is a notch 501 on the wind shield 500, and the laminar wind flows out of the shell 200 through the notch 501 and the indoor air outlet 212 in turn to reach the room. Preferably, in order to make as much wind as possible blow out from the indoor air outlet 212, the shell body is only provided with an indoor air outlet 212 at the position corresponding to the notch 501. The wind shield 500 can be defined by using one and / or a combination of more than one wind shield to define the notch 501. Fig.10 It is a schematic stereoscopic diagram of a wind shield 500 of an integrated air conditioner 100 according to an embodiment of the present invention, wherein the shell body has a front side, an upper side, a rear side and a lower side, and an indoor air outlet 212 is provided on the front side; the wind shield 500 has an upper side, a rear side and a lower side, and the front side is missing to define a gap 501. Figure 6 is a schematic perspective view of an integrated air conditioner 100 according to yet another embodiment of the present invention. Figure 7 yes Figure 6The schematic top view of some components of the integrated air conditioner 100 is shown. Taking the V-shaped evaporator 122 as an example, the housing body can be provided with indoor air outlets 212 on its front and rear sides, and wind shields are respectively provided between its upper and lower sides and the laminar flow fan 300.

[0087] The laminar flow fan 300 further includes a driving disc 305 and a connecting member 306. The driving disc 305 is arranged in parallel with the plurality of annular discs 301 at intervals. The connecting member 306 penetrates the driving disc 305 and the plurality of annular discs 301 to connect the plurality of annular discs 301 to the driving disc 305. The motor 400 is configured to directly drive the driving disc 305 to rotate, and then the driving disc 305 drives the plurality of annular discs 301 to rotate.

[0088] In some embodiments, the driving disk 305 of the laminar flow fan 300 is formed with a recessed portion 351 at its center facing the plurality of annular disks 301 , and the motor 400 is fixedly disposed in the recessed portion 351 . Fig.12 is a schematic three-dimensional diagram of a laminar flow fan 300 . Fig.15 yes Fig.12 A schematic cross-sectional view of a laminar flow fan 300 is shown. Fig.16 yes Fig.12 A schematic perspective view of the laminar flow fan 300 from another perspective is shown. Fig.17 yes Fig.12 A schematic perspective view of the laminar flow fan 300 from another perspective is shown.

[0089] The fixing mechanism 401 is disposed in the housing 200 and is used to fix the motor 400 . Fig.18 It is a schematic cross-sectional view of the cooperation among the fixing mechanism 401 , the motor 400 and the laminar flow fan 300 . Fig.19 It is a schematic exploded diagram of the motor 400 and the fixing mechanism 401. The fixing mechanism 401 includes a fixing plate 411 and a fixing frame 412, and the motor 400 is arranged between the fixing plate 411 and the fixing frame 412. The fixing plate 411 is longitudinally arranged between the upper shell 201 and the bottom shell 202. The fixing frame 412 has a main body 421 and a claw portion 422 extending from the main body 421 toward the fixing plate 411. A through hole 423 is provided on the main body 421, and the output shaft of the motor 400 extends from the fixing frame 412 from the through hole 423 and is connected to the laminar fan 300. The claw portion 422 is used to be fixed to the fixing plate 411, and is matched with the recessed portion 351. A connecting hole 352 is provided at the center of the recessed portion 351, and the output shaft of the motor 400 is fixed to the driving disc 305 after extending into the connecting hole 352. The fixing plate 411 is provided with a plate connection hole 414 , and the claw portion 422 is provided with a claw connection hole 424 , and the claw portion 422 is fixed to the fixing plate 411 by using bolts, etc. In addition, the fixing plate 411 is further provided with a reinforcing rib 415 . Fig.11 is a schematic perspective view of a fixing plate 411 of an integrated air conditioner 100 according to an embodiment of the present invention.

[0090] An accommodating chamber is formed between the fixing plate 411 and the partition plate 160. A compressor 140 and an electrical box 150 are arranged in the accommodating chamber. The compressor 140 is used to compress the refrigerant. A main control board is arranged in the electrical box 150.

[0091] An outdoor air inlet 221 is provided on the housing body between the partition plate 160 and the right cover plate 204 , and the outdoor air inlet 221 forms two opposite air inlet sides on the housing body. An outdoor air outlet 222 is provided on the right cover plate 204 .

[0092] The volute 611 is disposed between two opposite air inlet sides, with its inlet facing the outdoor air inlet 221 and its outlet facing the outdoor air outlet 222. The double-suction centrifugal fan 610 is disposed in the volute 611, which drives the outdoor air to enter the outdoor side 220 through the outdoor air inlet 221 and then turns in the volute 611 and is discharged from the outdoor air outlet 222. The double-suction centrifugal fan 610 has high efficiency by using the double air inlet side suction.

[0093] A first plate condenser 710 and a second plate condenser 720 are respectively arranged between the housing body and the two sides of the volute 611, for condensing the compressed refrigerant and exchanging heat with the outdoor air. It is understood that the integrated air conditioner 100 of the embodiment of the present invention may also include an expansion device, such as a capillary tube, for expanding the refrigerant condensed in the condenser 700 into a refrigerant in a low-pressure state. The evaporator 120 on the indoor side 210 and the condenser 700 on the outdoor side 220 are correspondingly equipped, so that the refrigerant in a low-temperature and low-pressure state from the expansion device is returned to the compressor 140.

[0094] In some other embodiments, the driving disk 305 of the laminar flow fan 300 has a plane, and the motor 400 is fixedly disposed on the plane of the driving disk 305 . Fig. 20 FIG. 1 is a schematic front view of a laminar flow fan 110 in which the driving disk 305 has a flat surface. Fig.21 yes Fig. 20 A schematic stereogram of another perspective of the laminar flow fan 110 is shown. In a preferred embodiment, a surface of one side of the driving disk 305 close to the annular disk 301 is further provided with an inverted cone-shaped protrusion 353, and the inverted cone-shaped protrusion 353 can effectively guide the air entering the laminar flow fan 300 through the air inlet channel 302 into the gaps between the disks, thereby improving the efficiency of forming the laminar flow wind.

[0095] Fig. 22 yes Fig. 20As shown in the air circulation diagram of the laminar flow fan 110, an air inlet channel 302 is formed in the center of multiple annular disks 301 to allow air outside the laminar flow fan 300 to enter; and multiple exhaust ports 303 are formed in the gaps between the multiple annular disks 301 for the laminar air to blow out.

[0096] The connecting member 306 of the laminar flow fan 300 may be a blade 361 , a connecting rod 362 , and the like.

[0097] Fig.23 yes Fig. 20 The cross-sectional schematic diagram of the laminar flow fan 110 shown. In the present embodiment, the connecting member 306 is a blade 361, and its cross section has two sections of curves arranged in sequence along the direction of rotation of the annular disk 301. The length of the chord 373 of the two sections of curves is linearly related to the air volume of the laminar flow fan 110. In this way, by increasing the length of the chord 373, the air volume of the laminar flow fan 110 can be greatly improved, thereby promoting laminar air circulation. It should be noted that the two sections of curves can be arcs, non-arc arcs, straight lines and other lines, and the straight line can be used as a special curve. When the distance between the two end points of the two sections of curves is the same, the length of the chord 373 can be the distance between the two end points of the two sections of curves. When the distances between the two endpoints of the two curves are different, if the two ends of the two curves do not intersect, the length of the chord 373 can be the length of the line connecting the midpoints of the curves of the cross section of the blade 361 excluding the two curves; if only one end of the two curves intersects, the length of the chord 373 can be the length of the line connecting the midpoint of the curve of the cross section of the blade 361 excluding the two curves and the intersecting endpoints of the two curves.

[0098] In a preferred embodiment, there are multiple blades 361, which are evenly spaced and penetrate the driving disc 305 and the multiple annular discs 301. The multiple blades 361 are evenly spaced and penetrate the driving disc 305 and the multiple annular discs 301, which can ensure that the connection relationship between the driving disc 305 and the multiple annular discs 301 is stable, and further ensure that when the motor 400 drives the driving disc 305 to rotate, the driving disc 305 can stably drive the multiple annular discs 301 to rotate, thereby improving the working reliability of the laminar flow fan 110.

[0099] Fig.24 It is shown that Fig. 20The laminar flow fan 110 shown is a schematic diagram of the relationship between the length of the chord 373 and the air volume and wind pressure when the outer diameter, inner diameter, number of layers, spacing, thickness, installation angle of the blade 361, and the speed of the motor 400 of the annular disk 301 remain unchanged. The horizontal axis in the figure refers to the length of the chord 373 of the blade 361, and the wind pressure refers to the pressure difference between the exhaust port 303 and the inlet of the air inlet channel 302. It should be noted that the outer diameter of the annular disk 301 is the radius of its outer circumference, and the inner diameter is the radius of its inner circumference. The process of the air boundary layer 304 rotating from the inside to the outside to form laminar wind is centrifugal motion, so the speed when leaving the exhaust port 303 is greater than the speed when entering the air inlet channel 302. The pressure difference between the exhaust port 303 and the inlet of the air inlet channel 302 is the wind pressure, and the length of the chord 373 is also linearly related to the wind pressure. By increasing the length of the chord 373, the wind pressure of the laminar flow fan 110 can also be greatly improved, effectively ensuring the comprehensive performance of the laminar flow fan 110.

[0100] Considering the limited internal space of the integrated air conditioner 100, there needs to be certain constraints on the overall occupied volume of the laminar flow fan 110. Specifically, considering that the thickness of the laminar flow fan 110 should not be too large, the number of annular discs 301, the spacing between two adjacent annular discs 301, and the thickness of the annular disc 301 can be constrained accordingly; considering that the lateral occupied volume of the laminar flow fan 110 should not be too large, the outer diameter of the annular disc 301 can be constrained accordingly. For example, the outer diameter of each annular disc 301 can be set to 170mm to 180mm, and the inner diameter of each annular disc 301 can be set to 110mm to 120mm, which can effectively increase the air volume and ensure that the air outlet of the laminar flow fan 110 meets the user's usage requirements. When the outer diameter and inner diameter of the annular disk 301 are constant, although the longer the chord 373 is, the greater the air volume and air pressure of the laminar flow fan 110 are, the length of the chord 373 must be constrained to prevent the blades 361 from excessively penetrating the annular disk 301, resulting in a decrease in the stability of the laminar flow fan 110. In summary, the length of the chord 373 can be set to the maximum achievable range so that the air volume and air pressure of the laminar flow fan 110 can meet the user's usage requirements. In a preferred embodiment, the outer diameter of the annular disk 301 is 175 mm, the inner diameter is 115 mm, the number of layers is 8, the spacing is 13.75 mm, the thickness is 2 mm, the installation angle of the blades 361 is 25.5°, and the speed of the motor 400 is 1000 rpm. It can be found that after increasing the length of the chord 373, the air volume and air pressure are greatly improved, and are basically linear. Under the premise of ensuring the stability of the laminar flow fan 110, the length of the string 373 is set to a maximum range of 40mm to 42mm. And when the length of the string 373 is set to 42mm, the air volume of the laminar flow fan 110 can reach 1741m 3 / h, the wind pressure can reach 118.9Pa, which can fully meet the user's needs.

[0101] In some embodiments, the blade 361 can be a double arc blade 310, whose cross-section has a double arc protruding toward the direction of rotation of the annular disk 301, including an inner arc 371 and a back arc 372 arranged in sequence along the direction of rotation of the annular disk 301, and the inner arc 371 and the back arc 372 have the same center and are arranged in parallel. Fig.25 3 is a schematic cross-sectional view of a laminar flow fan 110 having double arc blades 310. In a preferred embodiment, the outer diameter of each annular disc 301 is 170 mm to 180 mm, the inner diameter of each annular disc 301 is 110 mm to 120 mm, the difference between the outer diameter and the inner diameter of the annular disc 301 is about 60 mm, the distance between the two ends of the inner arc 371 is the same as the distance between the two ends of the back arc 372, the length of the chord 373 is the distance between the two ends of the inner arc 371 or the back arc 372, and is set to 40 mm to 42 mm, so that the two ends of the inner arc 371 and the back arc 372 are about 10 mm away from the inner circumference and the outer circumference of the annular disc 301, respectively. On the premise of ensuring the stability of the laminar flow fan 110, the length of the chord 373 is set to the maximum achievable range, so that the air volume and air pressure of the laminar flow fan 110 can meet the user's use requirements.

[0102] Fig.26 The figure is a schematic diagram showing the relationship between the installation angle α of the double arc blade 310 and the air volume and air pressure when the outer diameter, inner diameter, number of layers, spacing, thickness, chord length of the double arc blade 310, and the rotation speed of the motor 400 of the annular disk 301 remain unchanged. The horizontal axis refers to the installation angle of the double arc blade 310, that is, the angle formed by the chord line 373 between the two end points of the inner arc 371 and the connecting line 374 passing through the midpoint of the chord line 373 and the central axis of the annular disk 301 on the same cross section of the double arc blade 310 and the annular disk 301. In a preferred embodiment, the annular disk 301 has an outer diameter of 175 mm, an inner diameter of 115 mm, 8 layers, a spacing of 13.75 mm, a thickness of 2 mm, a chord length of the double arc blade 310 of 35 mm, and a rotation speed of the motor 400 of 1000 rpm. At this time, considering the comprehensive air volume and air pressure, the installation angle α of the double arc blade 310 can be set to -5° to 55°. It should be noted that when the direction of rotation of the annular disc 301 is the chord line 373 and the connecting line 374, the installation angle α is a positive number; when the direction of rotation of the annular disc 301 is the connecting line 374 and the chord line 373, the installation angle α is a negative number. This installation angle takes into account the air volume and air pressure of the laminar flow fan 110, effectively guarantees the comprehensive performance of the laminar flow fan 110, and enables the air outlet of the laminar flow fan 110 to meet the user's usage requirements while the air pressure is large, further improving the user's usage experience.

[0103] In other embodiments, the blade 361 may be an aviation blade 320, whose cross section has a double arc protruding toward the direction of rotation of the annular disk 301, including an inner arc 371 and a back arc 372 arranged in sequence along the direction of rotation of the annular disk 301, and the inner arc 371 and the back arc 372 have different centers and intersect at both ends. Fig. 27 is a schematic cross-sectional view of a laminar flow fan 110 having an aero blade 320 .

[0104] Fig.28 yes Fig. 27 The laminar flow fan 110 shown is a schematic diagram of the relationship between the installation angle α of the aviation blade 320 and the air volume and wind pressure when the outer diameter, inner diameter, number of layers, spacing, thickness, chord length of the aviation blade 320, and the speed of the motor 400 of the annular disk 301 remain unchanged. The horizontal axis refers to the installation angle of the aviation blade 320, that is, the angle formed by the chord line 373 between the two end points of the inner arc 371 or the back arc 372 and the connecting line 374 passing through the midpoint of the chord line 373 and the central axis of the annular disk 301 on the same cross section of the aviation blade 320 and the annular disk 301. In a preferred embodiment, the annular disk 301 has an outer diameter of 175 mm, an inner diameter of 115 mm, a number of layers of 8 layers, a spacing of 13.75 mm, a thickness of 2 mm, a chord length of the aviation blade 320 of 35 mm, and a speed of the motor 400 of 1000 rpm. At this time, considering the comprehensive air volume and wind pressure, the installation angle α of the aviation blade 320 can be set to -50° to 15°. This installation angle takes into account the air volume and air pressure of the laminar flow fan 110, effectively ensuring the comprehensive performance of the laminar flow fan 110. When the air pressure is high, the air output of the laminar flow fan 110 can also meet the user's usage needs, further improving the user's usage experience.

[0105] The annular disk 301 of the laminar flow fan 300 can also be arranged according to one or more of the following structures: the spacing between two adjacent annular disks 301 gradually increases along the direction of air flow in the air inlet channel 302; the inner diameters of multiple annular disks 301 gradually decrease along the direction of air flow in the air inlet channel 302; each annular disk 301 is an arc-shaped disk that gradually approaches the driving disk 305 from the inside to the outside.

[0106] In some embodiments, the multiple annular disks 301 of the laminar flow fan 300 are arranged in parallel with each other and have the same central axis, and the distance between two adjacent annular disks 301 gradually increases along the direction of air flow in the air inlet channel 302. Fig.293 is a schematic front view of a laminar flow fan 110 with gradually changing spacing between annular discs 301. The inventor has found through multiple experiments that as the spacing between two adjacent annular discs 301 gradually increases along the direction of air flow in the air inlet channel 302, the air volume of the laminar flow fan 110 is effectively increased, so that the air output of the laminar flow fan 110 meets the user's usage requirements.

[0107] Taking the laminar flow fan 110 disposed in the upper part of the housing 200 as an example, Fig.31 yes Fig.29 The laminar flow fan 110 shown is a schematic diagram of the relationship between the gradual change of the spacing between multiple annular disks 301 and the air volume and air pressure when the outer diameter, inner diameter, number, thickness, and speed of the motor 400 of the annular disk 301 remain unchanged, wherein the horizontal axis refers to the change in the spacing between two adjacent annular disks 301 from bottom to top. Fig.31 As shown, when all the above-mentioned parameters remain unchanged, the distance between every two adjacent annular disks 301 in the plurality of annular disks 301 gradually changes from bottom to top, which has a greater impact on the air volume, but has a small impact on the wind pressure; when the change in the distance between two adjacent annular disks 301 along the direction from bottom to top represented by the horizontal axis is a positive number, it means that the distance between every two adjacent annular disks 301 in the plurality of annular disks 301 gradually increases from bottom to top; when the change in the distance between two adjacent annular disks 301 along the direction from bottom to top represented by the horizontal axis is a negative number, it means that the distance between every two adjacent annular disks 301 in the plurality of annular disks 301 gradually decreases from bottom to top. Therefore, Fig.31 It can be seen that when the distance between every two adjacent annular disks 301 in the plurality of annular disks 301 changes by -1 mm, 1 mm, and 2 mm, the air volume and air pressure of the laminar flow fan 110 are greatly improved.

[0108] As mentioned above, the connecting member 306 of the laminar flow fan 300 in the embodiment of the present invention may be a connecting rod 362 . Fig.30 yes Fig.29Schematic stereogram of the laminar flow fan 110 shown. There can be multiple connecting rods 362, which are uniformly spaced and penetrate the edge portions of the driving disc 305 and the multiple annular discs 301. Multiple connecting rods 362 are uniformly spaced and penetrate the edge portions of the driving disc 305 and the multiple annular discs 301, which can ensure that the connection relationship between the driving disc 305 and the multiple annular discs 301 is stable, and further ensure that when the motor 400 drives the driving disc 305 to rotate, the driving disc 305 can stably drive the multiple annular discs 301 to rotate, thereby improving the working reliability of the laminar flow fan 110. At the same time, when the connecting member 306 is a connecting rod 362, the rotation speed of the motor 400 is roughly linearly related to the air volume of the laminar flow fan 110, so in a preferred embodiment, the motor 400 can also be configured as follows: the rotation speed of the motor 400 is determined according to the acquired target air volume of the laminar flow fan 110. That is to say, the target air volume of the laminar flow fan 110 can be obtained first, and then the speed of the motor 400 can be determined according to the linear relationship between the target air volume and the speed of the motor 400. It should be noted that the target air volume can be obtained through the user's input operation. In a preferred embodiment, the outer diameter of the annular disc 301 is 175mm, the inner diameter is 115mm, the number of layers is 8, and the spacing between two adjacent annular discs 301 is set from bottom to top to: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm, 19.75mm, and when the thickness is 2mm, the linear relationship between the speed of the motor 400 and the air volume of the laminar flow fan 110 is more obvious.

[0109] In some embodiments, the inner diameters of the multiple annular disks 301 of the laminar flow fan 300 of the embodiment of the present invention gradually decrease along the direction of the airflow in the air inlet channel 302. Taking the laminar flow fan 300 disposed in the upper part of the housing 200 as an example, Fig.32 Schematic cross-sectional view of a laminar flow fan 300 with a ring disk 301 having a gradually changing inner diameter. Fig.33 Is such as Fig.32 The laminar flow fan 300 of the laminar flow fan 110 shown in the figure shows the relationship between the gradual change of the inner diameter of the multiple annular disks 301 and the air volume and air pressure when the outer diameter, spacing, number, thickness and speed of the motor 400 of the annular disk 301 remain unchanged, wherein the horizontal axis refers to the change in the inner diameter of each annular disk 301 with respect to the inner diameter of the adjacent annular disk 301 below. Fig.33As shown, when all the above-mentioned parameters remain unchanged, the gradual change of the inner diameter of the multiple annular disks 301 from bottom to top has a greater impact on the air volume, but has a small impact on the wind pressure. When the amount of change between the inner diameter of each annular disk 301 represented by the horizontal axis and the inner diameter of the adjacent annular disk 301 below is a positive number, it means that the inner diameters of the multiple annular disks 301 gradually increase from bottom to top; when the amount of change between the inner diameter of each annular disk 301 represented by the horizontal axis and the inner diameter of the adjacent annular disk 301 below is a negative number, it means that the inner diameters of the multiple annular disks 301 gradually decrease from bottom to top. Fig.33 It can be seen that when the inner diameters of the multiple annular discs 301 gradually decrease from bottom to top, the air volume increases and the wind pressure decreases slightly; when the inner diameters of the multiple annular discs 301 gradually increase from bottom to top, the wind pressure increases slightly and the air volume decreases a lot. In a preferred embodiment, the outer diameter of the annular disc 301 is 175mm, the maximum inner diameter of the annular disc 301 is 115mm, the spacing is 13.75mm, the number is 8, the thickness is 2mm, and the speed of the motor 400 is 1000rpm. At this time, considering the comprehensive consideration of the air volume and wind pressure, the change amount of the inner diameter of each annular disc 301 and the inner diameter of the adjacent annular disc 301 below can be set to -5mm, that is, the inner diameters of the 8 annular discs 301 are: 115mm, 110mm, 105mm, 100mm, 95mm, 90mm, 85mm, 80mm respectively.

[0110] In some embodiments, the annular disc 301 of the laminar flow fan 300 is an arc-shaped disc that gradually approaches the driving disc 305 from the inside to the outside. Taking the laminar flow fan 300 disposed at the upper inner part of the housing 200 as an example, each annular disc 301 is configured as an arc-shaped disc that gradually rises from the inside to the outside and bulges upward, so that the angle at which the external air enters the laminar flow fan 300 is more consistent with the fluid flow, thereby being more conducive to the external air entering the laminar flow fan 300, effectively reducing the air volume loss, and ensuring that the air output of the laminar flow fan 110 meets the user's usage requirements. Fig.34 It is a schematic diagram of the central angle θ of the line connecting the inner and outer diameters of the plurality of annular disks 301 on the same longitudinal section passing through the central axis. Fig.35 FIG. 4 is a schematic diagram showing the relationship between the central angle θ and the air volume and air pressure when the outer diameter, number of layers, spacing, thickness, and speed of the annular disk 301 and the motor 400 remain unchanged. Fig.35 As shown, when all the above-mentioned parameters remain unchanged, as the central angle θ gradually increases, the air volume increases first and then decreases, while the wind pressure rises slightly. In a preferred embodiment, the outer diameter of the annular disk 301 is 175mm, the number of layers is 10, the spacing is 13.75mm, the thickness is 2mm, and the speed of the motor 400 is 1000rpm. At this time, considering the comprehensive air volume and wind pressure, the central angle θ can be set to 9° to 30°. And as Fig.35As shown, when the central angle θ is set to 15°, the air volume of the laminar flow fan 110 reaches a maximum value.

[0111] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. An integrated air conditioner, characterized in that: include: A shell, the interior of which is divided into an indoor side and an outdoor side, the shell on the indoor side is provided with an indoor air inlet and an indoor air outlet, and the shell on the outdoor side is provided with an outdoor air inlet and an outdoor air outlet; as well as A laminar flow fan is arranged inside the room and is provided with an air inlet passage; The indoor air reaches the air inlet channel through the indoor air inlet, the laminar flow fan disturbs the indoor air entering the air inlet channel through the fluid viscosity effect to form laminar flow, and the laminar flow is discharged from the housing through the indoor air outlet to reach the room; The laminar flow fan comprises: A laminar flow fan, comprising a plurality of annular discs, the plurality of annular discs being arranged in parallel and spaced apart from each other, having the same central axis and the centers jointly forming the air inlet channel, the indoor air entering the air inlet channel and reaching the gaps between the plurality of annular discs; The laminar flow fan also includes: a driving disk disposed in parallel and spaced relation to the plurality of annular disks; and a connecting member, penetrating the driving disk and the plurality of annular disks, so as to connect the plurality of annular disks to the driving disk; The connecting member is a blade, and the cross section of the blade has two curved lines arranged in sequence along the rotation direction of the annular disk. The length of the chord of the two curved lines is linearly related to the air volume of the laminar flow fan.

2. The integrated air conditioner according to claim 1, characterized in that: The shell on the indoor side is provided with the indoor air outlet surrounding the laminar flow fan.

3. The integrated air conditioner according to claim 2, characterized in that: Also includes: The first heat exchanger is arranged on the indoor side and is used for performing heat exchange with the indoor air entering the indoor side through the indoor air inlet. The indoor air after heat exchange by the first heat exchanger reaches the air inlet channel.

4. The integrated air conditioner according to claim 3, characterized in that: Also includes: An air supply fan is arranged outside the room; as well as A second heat exchanger is disposed on the outdoor side and is used to perform heat exchange with outdoor air entering the outdoor side through the outdoor air inlet; The air supply fan drives the outdoor air to pass through the outdoor air inlet and, after heat exchange in the second heat exchanger, is discharged from the shell through the outdoor air outlet to the outdoors.

5. The integrated air conditioner according to claim 4, characterized in that: The air supply fan is a centrifugal fan.

6. The integrated air conditioner according to claim 4, characterized in that: The first heat exchanger is an evaporator, and the second heat exchanger is a condenser; The integrated air conditioner further comprises: a compressor for compressing the refrigerant; The condenser is used to condense the refrigerant from the compressor; The evaporator is connected to the condenser correspondingly and is used to return the refrigerant to the compressor.

7. The integrated air conditioner according to claim 2, characterized in that: The laminar flow fan also includes: The motor is configured to drive the multiple annular disks to rotate, so that the air boundary layer close to the surfaces of the multiple annular disks is driven by the rotating multiple annular disks to rotate from inside to outside to form the laminar wind.

8. The integrated air conditioner according to claim 7, characterized in that: The motor is configured to directly drive the driving disc to rotate, and then the driving disc drives the plurality of annular discs to rotate.

9. The integrated air conditioner according to claim 8, characterized in that: The cross section of the blade has a double arc convex toward the direction of rotation of the annular disk, including an inner arc and a back arc sequentially arranged along the direction of rotation of the annular disk; wherein, The inner arc and the back arc have different centers and intersect at both ends, or The inner arc and the back arc have the same center and are arranged in parallel.

10. The integrated air conditioner according to claim 8, characterized in that: The annular disc is arranged according to one or more of the following structures: The distance between two adjacent annular discs gradually increases along the direction of the airflow in the air inlet channel; The inner diameters of the plurality of annular discs gradually decrease along the direction in which the airflow flows in the air inlet channel; Each of the annular discs is an arc-shaped disc that gradually approaches the driving disc from the inside to the outside.

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