Ceiling air conditioner indoor unit

Abstract

The present invention provides a ceiling-mounted air conditioner indoor unit, which comprises a shell, the upper part of which has at least one air inlet, and the lower part of which has at least one air outlet; a heat exchanger, which is arranged in the shell; and a laminar flow fan, which is arranged in the shell with a rotating axis extending vertically and is located below the heat exchanger. When the laminar flow fan is in operation, it causes indoor air to enter the space above the heat exchanger from the air inlet, and then flow downward through the heat exchanger to exchange heat with it to form heat exchange wind, and then the heat exchange wind is blown back into the room through the air outlet. The ceiling-mounted air conditioner indoor unit of the present invention realizes multi-directional and large-range air supply, reduces air supply noise, and improves noise quality.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to a ceiling-mounted air-conditioning indoor unit. Background Art

[0002] Existing air conditioner indoor units basically use cross-flow fans, and the air outlet direction is straight ahead. Although there are air guide plates to guide air left and right, and swing blades to guide air up and down, due to the volute structure, the left and right air supply angles are usually less than 80°, and the up and down air supply angles are usually less than 100°. It can be seen that the existing indoor units have fewer air supply directions and a very limited air supply range.

[0003] In addition, the current cross-flow fan mainly has forward blades, which periodically impact the passing airflow, generating obvious rotation noise. The volute cooperates with the fan to achieve the air supply effect, and the front and rear volute tongues also impact the airflow, generating strong turbulent noise. It is difficult to significantly improve the noise quality under the existing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a ceiling-mounted air conditioner indoor unit to achieve multi-directional and large-range air supply, reduce air supply noise, improve noise quality, and make the bottom more complete and beautiful.

[0005] In particular, the present invention provides a ceiling-mounted air conditioner indoor unit, comprising:

[0006] The housing has at least one air inlet on the upper side and at least one air outlet on the lower side;

[0007] a heat exchanger disposed within the housing; and

[0008] The laminar flow fan has a rotating axis extending vertically inside the shell and is located below the heat exchanger. When the laminar flow fan is in operation, it causes the indoor air to enter the space above the heat exchanger from the air inlet, then flow downward through the heat exchanger to exchange heat with it to form heat exchange wind, and then the heat exchange wind is blown back into the room through the air outlet.

[0009] Optionally, the ceiling-mounted air-conditioning indoor unit also includes: a partition installed in the shell to divide the internal space of the shell into upper and lower parts, at least one air inlet and a heat exchanger are located on the upper side of the partition, and at least one air outlet and a laminar flow fan are located on the lower side of the partition; and the edge of the partition is connected to the inner wall of the shell, and a vent is opened in the center to allow heat exchange wind on the upper side of the partition to flow downward through it to the laminar flow fan on the lower side of the partition.

[0010] Optionally, the partition includes: a base plate portion with a vent opening in the center thereof; and at least one supporting rib extending upward from the periphery of the vent opening, for supporting the heat exchanger upward to form a gap between the heat exchanger and an upper surface of the base plate portion.

[0011] Optionally, the laminar flow fan includes: a plurality of annular disks, which are arranged in parallel and spaced apart and fixedly connected to each other, with their axes extending vertically and being colinear; a circular disk, which is coaxial with the lowest annular disk and arranged in parallel and spaced apart therebelow, and the center of the circular disk is recessed upward to form an accommodating cavity; and a motor, which is located in the accommodating cavity, the bottom of which is directly or indirectly fixed to the shell, and the top of which extends a rotating shaft to connect the circular disk, so as to drive the circular disk to rotate, thereby driving the plurality of annular disks to rotate, so that the air boundary layer on the surface of the plurality of annular disks is driven by the plurality of annular disks to rotate from the inside to the outside due to the viscosity effect to form a laminar wind.

[0012] Optionally, the ceiling-mounted air conditioner indoor unit also includes: a mounting plate, fixedly arranged inside the shell; and a fixing frame, which includes a pressure ring and a plurality of connecting arms extending downward from the edge of the pressure ring, and the plurality of connecting arms are detachably connected to the mounting plate; and the motor is placed on the mounting plate and is located at the lower side of the pressure ring to be constrained by it, and the rotating shaft of the motor extends upward from the center of the pressure ring.

[0013] Optionally, for any two adjacent annular discs, the inner diameter of the annular disc located on the upper side is greater than the inner diameter of the annular disc located on the lower side.

[0014] Optionally, the heat exchanger is in the shape of a flat plate and is placed along a horizontal plane in the shell.

[0015] Optionally, the ceiling-mounted air conditioner indoor unit also includes: an annular air duct, which is a ring-shaped ring with a vertically extending axis, which is arranged in the shell and surrounds the radial outside of the laminar fan, and is used to guide the outlet airflow of the laminar fan to the air outlet in a preset direction.

[0016] Optionally, the annular air duct includes: an annular top plate and an annular bottom plate arranged in parallel and at intervals, the two are coaxial and the axis extends vertically; the annular top plate and the annular bottom plate are flat plates extending in a plane so as to guide the outlet air flow to flow horizontally toward the air outlet, or are truncated cone plates extending radially gradually downward from the inside to the outside so as to guide the outlet air flow to flow obliquely downward toward the air outlet; and a plurality of connecting strips extending upward and downward, the upper and lower ends of each connecting strip being fixedly connected to the annular top plate and the annular bottom plate respectively.

[0017] Optionally, the shell is square as a whole; the shell is square as a whole; among the four sides of the shell, an air outlet is arranged at the lower part of each side; among the four sides of the shell, an air inlet is arranged at the upper part of one or more sides.

[0018] The ceiling-mounted air conditioner indoor unit of the present invention is suspended on the roof, and the entire side of the shell is exposed to the outside, so that multiple air outlets can be arranged on the side, thereby achieving two-side, three-side, four-side air outlets and even 360° circumferential air supply, and the air supply range is extremely large. In addition, the air inlet is also arranged on the side of the shell, so that the bottom surface of the shell mainly facing the user is more complete and beautiful because there is no need to design an air inlet structure.

[0019] Furthermore, the ceiling-mounted air conditioner indoor unit of the present invention adopts a laminar flow fan, which is based on the laminar flow principle to achieve annular air outlet without dead angles, and facilitates the multi-directional air supply of the indoor unit. In addition, the laminar flow fan uses the viscosity of the air boundary layer to do work, and the annular disc is basically parallel to the flow direction of the airflow, which will not strongly disturb the impact airflow and produce violent vortices, greatly reducing its noise and having excellent noise quality, which significantly improves the user experience.

[0020] Furthermore, for any two adjacent annular disks, the inner diameter of the annular disk located on the upper side is larger than the inner diameter of the annular disk located on the lower side, so that the wind can flow to each annular disk more evenly and smoothly, thereby increasing the air volume and improving the operating efficiency of the laminar flow fan.

[0021] 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

[0022] 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:

[0023] Figure 1 is a structural schematic diagram of a ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A schematic exploded view of the indoor unit of the ceiling mounted air conditioner shown;

[0025] Figure 3 Cut along a vertical plane Figure 1 A cross-sectional view of an indoor unit of a ceiling-mounted air conditioner shown;

[0026] Figure 4 yes Figure 2 A schematic enlarged view of the fixing frame in FIG.

[0027] Figure 5 yes Figure 1 A schematic diagram of the structure behind the hidden shell of the indoor unit of the ceiling-mounted air conditioner is shown;

[0028] Figure 6 yes Figure 5 Structural schematic diagram of the annular air duct in FIG.

[0029] Figure 7 This is a schematic diagram of the air supply principle of a laminar flow fan;

[0030] Figure 8yes Figure 1 Schematic diagram of a laminar flow fan from top view;

[0031] Fig. 9 yes Figure 1 A schematic cross-sectional view of a plurality of annular disks of a laminar flow fan;

[0032] Fig.10 yes Figure 1 A schematic diagram of air circulation of a laminar flow fan of the illustrated embodiment;

[0033] Fig.11 is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention;

[0034] Fig.12 This is a schematic diagram of the relationship between the gradual change in the spacing between multiple annular disks of a laminar flow fan and the air volume and air pressure. DETAILED DESCRIPTION

[0035] Refer to the following Figures 1 to 12 The ceiling-mounted air conditioner indoor unit of the embodiment of the present invention is described. The directions or positional relationships indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0036] The ceiling-mounted air conditioner indoor unit and the air conditioner outdoor unit (not shown) of the embodiment of the present invention together form a vapor compression refrigeration cycle system to achieve cooling / heating of the indoor environment.

[0037] Figure 1 is a structural schematic diagram of a ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention. Figure 2 yes Figure 1 The schematic exploded view of the indoor unit of the ceiling-mounted air conditioner is shown. Figure 3 Cut along a vertical plane Figure 1 A cross-sectional view of the indoor unit of a ceiling-mounted air conditioner is shown.

[0038] like Figures 1 to 3 As shown, the ceiling-mounted air conditioner indoor unit according to the embodiment of the present invention may generally include a housing 100 , a heat exchanger 400 and a laminar flow fan 300 .

[0039] The ceiling-mounted air conditioner indoor unit is hoisted under the indoor roof as a whole, and the top of the housing 100 is used to connect to the roof. The upper side of the housing 100 has at least one air inlet 110, and the lower side has at least one air outlet 120. A grille may be provided at the air inlet 110.

[0040] Since the shell side of the indoor unit of the ceiling-mounted air conditioner is basically exposed to the outside, the number of air outlets can be set as needed. For example, if the indoor unit is used to be installed on the roof near the side wall, only one air outlet can be set. If the installation position of the indoor unit is far away from the side wall, such as being set in the center of the roof, two, three, four or other multiple air outlets with different directions can be set to achieve multi-directional air supply effects such as two-sided air outlet, three-sided air outlet, and four-sided air outlet. Even, the shell can be made circular, and air outlets are opened at all angles of its circumference for air outlet, so as to achieve 360° all-round air supply.

[0041] The present invention realizes multi-directional air supply with a wide air supply range. In addition, since the indoor unit of the ceiling-mounted air conditioner is installed at a high position, its air outlet coverage is also wide, which is conducive to improving the cooling / heating speed and making the user more comfortable. In addition, the air inlet is arranged on the side of the shell, so that the bottom surface of the shell mainly facing the user is more complete and beautiful because there is no need to design an air inlet structure.

[0042] An optional structure of the housing 100 is as follows Figure 2 As shown. The shell 100 is square as a whole, and includes two "U"-shaped side panels 101 and 102 arranged opposite to each other, as well as a top plate 104 and a bottom plate 103. The two straight edges of each "U"-shaped side panel extend in the vertical direction. The straight edges of the two "U"-shaped side panels are connected to form a square circle, which has four sides. Among the four sides, an air outlet 120 is provided at the lower part of each side to supply air in four directions. An air inlet 110 is provided at the upper part of each side to realize air intake from four directions. Of course, one, two or three air inlets can be provided on the shell 100, or one, two or three air outlets can be provided, and the specific selection is made according to actual needs.

[0043] The top plate 104 covers the top of the two "U"-shaped side plates, and the bottom plate 103 covers the bottom of the two "U"-shaped side plates to jointly form a closed space for accommodating the heat exchanger and the laminar flow fan. Figure 2 .

[0044] The heat exchanger 400 is disposed in the housing 100 and is located at the upper part of the internal space of the housing 100. The heat exchanger 400 may be an evaporator of a vapor compression refrigeration cycle. The heat exchanger 400 may be in the form of a flat plate and placed along a horizontal plane in the housing 100, such as Figure 2 Of course, the heat exchanger 400 may also be in other shapes, such as a zigzag shape or a wave shape.

[0045] The rotation axis of the laminar flow fan 300 is arranged in the housing 100 extending in the vertical direction (up and down direction) and is located below the heat exchanger 400. When the laminar flow fan 300 is in operation, it uses the viscosity of air to generate laminar wind, prompting the indoor air to enter the space above the heat exchanger 400 from the air inlet 110, and then flow downward through the heat exchanger 400 to exchange heat with it to form heat exchange wind (when cooling, the heat exchange wind is cold wind, and when heating, the heat exchange wind is hot wind), and then the heat exchange wind is blown back to the room through the air outlet 120. Figure 1 and Figure 3 Arrows are used to indicate the direction of air inlet and outlet.

[0046] like Figure 2 and Figure 3 As shown, a partition 800 is also fixedly installed in the shell 100. The partition 800 divides the internal space of the shell 100 into two parts, namely, an upper and a lower part. The air inlet 110 and the heat exchanger 400 are located on the upper side of the partition 800. The air outlet 120 and the laminar flow fan 300 are located on the lower side of the partition 800. The edge of the partition 800 is connected to the inner wall of the shell 100 to prevent air flow from passing through, and a vent 801 is opened in the center to allow the heat exchange wind on the upper side of the partition 800 to flow downward through the vent 801 to the laminar flow fan 300 on the lower side of the partition 800.

[0047] One function of the partition 800 is to separate the inlet and outlet air flows, thereby preventing the inlet air flow from flowing directly to the air outlet 120 without heat exchange, and also preventing the outlet air flow (i.e., heat exchange air) from returning to the heat exchanger 400 to affect the heat exchange of the inlet air flow.

[0048] Another function of the partition 800 is to support the heat exchanger 400. Figure 2 and Figure 3 As shown, the partition 800 includes a base plate portion 810 and at least one supporting rib 830 (eg, Figure 2 A square support rib and two "V"-shaped support ribs are provided outside the square support rib. The aforementioned vent 801 is provided in the center of the base plate 810. A flange 820 is provided at the edge of the base plate 810 so as to better fit against the inner side of the housing 100. Figure 3 The support ribs 830 extend upward from the periphery of the vent 801. The heat exchanger 400 is placed on the partition 800, and the support ribs 830 are used to support the heat exchanger 400 upward. The purpose of providing the support ribs 830 is to form a gap between the heat exchanger 400 and the upper surface of the base plate 810 to allow airflow to enter and exchange heat with the bottom portion of the heat exchanger 400.

[0049] like Figure 3As shown, the laminar flow fan 300 has an axial air inlet and radial air outlet structure. The upper side of the fan inlets air to absorb heat exchange air, and the radial air outlet blows the air horizontally to each air outlet 120. The laminar flow fan 300 is based on the laminar flow principle to achieve annular air outlet without dead angles. In addition, the laminar flow fan 300 uses the viscosity of the air boundary layer to do work, and the annular disc 10 is basically parallel to the flow direction of the airflow, which will not strongly disturb the impact airflow and produce violent vortices, so that its noise is greatly reduced and the noise quality is excellent, which significantly improves the user experience.

[0050] like Figure 2 and Figure 3 The laminar flow fan 300 generally includes a plurality of annular discs 10 and a motor 20. The plurality of annular discs 10 are arranged in parallel and fixedly connected to each other, and their axes extend vertically and are collinear. The motor 20 is used to drive the plurality of annular discs 10 to rotate, so that the air boundary layer on the surface of the plurality of annular discs 10 is driven by the plurality of annular discs 10 to rotate from inside to outside due to the viscosity effect to form a laminar wind.

[0051] In some optional structures, the laminar flow fan 300 further includes a circular disc 30 and a plurality of vertically extending connecting rods 40. The circular disc 30 is coaxial with the lowest annular disc 10 and is arranged below it in parallel and spaced apart. The bottom end of the connecting rod 40 is fixed to the circular disc 30, and passes through the plurality of annular discs 10 upwards and is fixed to each annular disc 10, so as to realize the mutual fixation of the plurality of annular discs 10 and the circular disc 30.

[0052] The center of the circular disk 30 may be recessed upward to form an accommodating chamber 31. The motor 20 is located in the accommodating chamber 31, and its bottom is directly or indirectly fixed to the housing 100, and a rotating shaft 21 extends from the top. The rotating shaft 21 is connected to the circular disk 30 to drive the circular disk 30 to rotate, thereby driving the plurality of annular disks 10 to rotate. The more specific principle and structure of the laminar flow fan 300 will be described in more detail later.

[0053] Figure 4 yes Figure 2 Schematic enlarged view of the fixing frame in the following reference Figure 2 and Figure 4 A connection method between the motor 20 and the housing 100 is introduced. The ceiling-mounted air conditioner indoor unit includes a mounting plate 105 and a fixing bracket 50. The fixing bracket 50 is used to fix the motor 20 to the mounting plate 105.

[0054] The mounting plate 105 is fixedly disposed on the bottom side of the housing 100. The fixing frame 50 includes a pressing ring 51 and a plurality of connecting arms 52 (at least two, for example Figure 4The pressing ring 51 is a hollow ring. The connecting arm 52 extends downward from the edge of the pressing ring 51, and its lower end is detachably connected to the mounting plate 105, specifically, it can be threaded. The motor 20 is placed on the mounting plate 105 and is located at the lower side of the pressing ring 51 to be constrained by it, and the rotating shaft 21 of the motor 20 extends upward from the center of the pressing ring 51.

[0055] like Figure 1 and Figure 3 As shown, at least one wind deflector 600 for guiding the wind direction is provided at each air outlet 120. The wind deflector 600 is in the shape of a long strip with its length direction parallel to the horizontal direction, and its rotation axis is parallel to its length direction. When multiple wind deflectors 600 are provided, the multiple wind deflectors 600 are arranged from top to bottom.

[0056] The air guide plate 600 can be rotated to open or close the air outlet 120, and the air outlet direction of the air outlet 120 can be changed by rotating the air guide plate 600 to different angles. The air guide plate 600 can be driven to rotate by a motor, and the specific driving mechanism is not described in detail.

[0057] Figure 5 yes Figure 1 The schematic diagram of the structure of the indoor unit of the ceiling-mounted air conditioner after the shell is hidden is shown. Figure 6 yes Figure 5 Schematic diagram of the structure of the annular air duct.

[0058] In some embodiments of the present invention, Figure 3 , Figure 5 and Figure 6 As shown, the ceiling-mounted air conditioner indoor unit further includes an annular air duct 700. The annular air duct 700 is in the shape of an annular ring with an axis extending vertically, which is arranged in the housing 100 and is located between the laminar flow fan 300 and the air outlet 120, and is surrounded by the radial outer side of the laminar flow fan 300. The annular air duct 700 is used to guide the air flow of the laminar flow fan 300 to the air outlet 120 in a preset direction.

[0059] like Figures 5 to 7 As shown, the annular air duct 700 may specifically include an annular top plate 710, an annular bottom plate 720 and a plurality of connecting strips 730. The annular top plate 710 is located above the annular bottom plate 720, and the two are arranged in parallel and spaced apart. In addition, the two are coaxial and the axis extends vertically. The upper and lower ends of each connecting strip 730 are respectively fixedly connected to the annular top plate 710 and the annular bottom plate 720. The setting position of the connecting strip 730 should avoid the air outlet 120 to prevent it from blocking the air outlet.

[0060] In such Figures 5 to 7In the embodiment shown, considering that the indoor unit of the ceiling-type air conditioner is installed at a higher position, the preset direction is tilted downward, so the annular top plate 710 and the annular bottom plate 720 are truncated cone-shaped plates that gradually extend downward from the inside to the outside in radial direction, so as to guide the wind downward. Figure 6 , the straight line L represents the extension direction of the upper surface of the annular bottom plate 720, and the straight line L1 represents a horizontally extending straight line, and the two form an acute angle.

[0061] In some alternative embodiments, the annular top plate and the annular bottom plate may also be flat plates extending in a plane so as to guide the outlet air flow to flow horizontally toward the outlet.

[0062] In this embodiment, the annular air duct 700 is used to guide the air flow of the laminar fan to the air outlet 120 more and more smoothly, so as to reduce the energy loss and noise caused by the eddy current.

[0063] Of course, in some alternative embodiments, in order to save costs, the annular air duct may not be provided, so that the air outlet of the laminar flow fan flows directly to the air outlet.

[0064] Refer to the following Figures 7 to 12 The laminar flow fan 300 is described in detail. Figure 7 This is a schematic diagram of the air supply principle of a laminar flow fan. Figure 7 As shown, the air supply principle of the laminar fan is mainly derived from the "Tesla turbine" discovered by Nikola Tesla. The Tesla turbine mainly uses the "laminar boundary layer effect" or "viscous effect" of the fluid to achieve the purpose of doing work on the "turbine disc". The annular disc 10 rotates at a high speed, and the air in the intervals between the annular discs 10 contacts and moves with each other. The air boundary layer 13 close to the surface of each annular disc 10 is driven by the rotating annular disc 10 to rotate from the inside to the outside to form a laminar wind due to the viscous shear force τ.

[0065] Figure 8 yes Figure 1 Schematic diagram of a laminar flow fan from top view; Fig. 9 yes Figure 1 A schematic cross-sectional view of a plurality of annular disks of a laminar flow fan; Fig.10 yes Figure 1 Schematic diagram of air circulation of the laminar flow fan of the illustrated embodiment.

[0066] like Fig. 9 and Fig.10 As shown, an air inlet channel 11 is formed in the center of the annular disk 10 to allow external air to enter. A plurality of air outlet channels 12 are formed in the gaps between the plurality of annular disks 10 to allow laminar wind to blow out. The process in which the air boundary layer 13 rotates from the inside to the outside to form the laminar wind is a centrifugal motion, so the speed when leaving the air outlet channel 12 is greater than the speed when entering the air inlet channel 11.

[0067] In some embodiments, for any two adjacent annular discs 10, the inner diameter of the annular disc 10 located on the upper side is greater than the inner diameter of the annular disc 10 located on the lower side. In other words, along the direction of the airflow in the air inlet channel 11 (i.e., from top to bottom), the inner diameter of the annular disc 10 gradually decreases. In this way, when the air enters the air inlet channel 11 from top to bottom, the airflow at different positions in the radial direction corresponds to different annular discs 10, which can make the air flow more evenly to each annular disc, avoid the difficulty of air entering the annular disc on the lower side, and finally achieve the effect of increasing the air volume.

[0068] Fig.11 is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention; Fig.12 This is a schematic diagram of the relationship between the gradual change in the spacing between multiple annular disks of a laminar flow fan and the air volume and air pressure.

[0069] In other embodiments, Fig.11 As shown, the distance between two adjacent annular discs 10 can be gradually increased from top to bottom. In other words, along the direction of the airflow in the air inlet channel 11, the distance between two adjacent annular discs 10 is gradually increased. After many experiments, it was found that such a setting can effectively increase the air volume of the laminar flow fan. For details, refer to Fig.12 .

[0070] Fig.12 The middle horizontal axis shrinking uniform expanding Plate distance increase refers to the change in the distance between two adjacent annular disks 10 from bottom to top, the left vertical axis Mass flowrate refers to the air volume, and the right vertical axis Pressure rise refers to the wind pressure, which refers to the pressure difference between the air outlet channel 12 and the inlet channel 11 of the laminar flow fan. In addition, the distance between two adjacent annular disks 10 has the same change, that is, the distance between two adjacent annular disks 10 increases or decreases by the same value.

[0071] Specifically, Fig.12The diagram shows the relationship between the gradual change in the spacing between the multiple annular disks 10 and the air volume and air pressure when the outer diameter, inner diameter, number, thickness, and speed of the motor 20 of the annular disk 10 of the laminar fan remain unchanged. When all the above-mentioned parameters remain unchanged, among the multiple annular disks 10, the gradual change in the spacing between every two adjacent annular disks 10 from bottom to top has a greater impact on the air volume, but has little impact on the wind pressure. When the change in the spacing between two adjacent annular disks 10 along the top-to-bottom direction represented by the horizontal axis is a positive number, it means that the spacing between every two adjacent annular disks 10 in the multiple annular disks 10 gradually increases from top to bottom; when the change in the spacing between two adjacent annular disks 10 along the top-to-bottom direction represented by the horizontal axis is a negative number, it means that the spacing between every two adjacent annular disks 10 in the multiple annular disks 10 gradually decreases from top to bottom. The change in the spacing between two adjacent annular disks 10 can be made the same. By Fig.12 It can be seen that when the distance between each two adjacent annular discs 10 in the plurality of annular discs 10 varies by -1 mm, 1 mm and 2 mm, the air volume and air pressure of the laminar flow fan are greatly improved. Taking the air volume and air pressure of the laminar flow fan into consideration, the distance between each two adjacent annular discs 10 in the plurality of annular discs 10 is set to gradually increase from top to bottom. For example, the outer diameter of the annular disk 10 is 175 mm, the inner diameter of the annular disk 10 is 115 mm, the number of the annular disk 10 is 8, the thickness of the annular disk 10 is 2 mm, and the speed of the motor 20 is 1000 rpm (revolutions per minute). At this time, considering the air volume and air pressure of the laminar flow fan, the spacing between two adjacent annular disks 10 in the 8 annular disks 10 can be set to 13.75 mm, 14.75 mm, 15.75 mm, 16.75 mm, 17.75 mm, 18.75 mm, and 19.75 mm from top to bottom, that is, the spacing between two adjacent annular disks 10 increases by 1 mm from top to bottom.

[0072] 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. A ceiling-mounted air conditioner indoor unit, Features include: The housing has at least one air inlet on the upper side and at least one air outlet on the lower side; A heat exchanger, the heat exchanger is in the shape of a flat plate and is arranged in the shell along a horizontal plane; A laminar flow fan, the rotation axis of which is vertically extended and arranged in the housing and located below the heat exchanger, when the laminar flow fan is in operation, causes indoor air to enter the space above the heat exchanger from the air inlet, then flow downward through the heat exchanger to exchange heat with it to form heat exchange wind, and then blow the heat exchange wind back into the room through the air outlet; and a partition installed in the shell to separate the internal space of the shell from top to bottom, the at least one air inlet and the heat exchanger are located on the upper side of the partition, and the at least one air outlet and the laminar flow fan are located on the lower side of the partition; and The edge of the partition is connected to the inner wall of the shell, and a vent is opened in the center to allow the heat exchange wind on the upper side of the partition to flow downward to the laminar fan on the lower side of the partition; The laminar flow fan comprises: A plurality of annular discs are arranged in parallel and spaced apart and fixedly connected to each other, and their axes all extend vertically and are in the same line; A circular disc is coaxial with the annular disc at the bottom and is arranged parallel to the annular disc at a distance therefrom, and the center of the circular disc is recessed upward to form a receiving cavity; and The motor is located in the accommodating cavity, and its bottom is directly or indirectly fixed to the bottom side of the shell. A rotating shaft extends from the top to connect the circular disk so as to drive the circular disk to rotate, thereby driving the multiple annular disks to rotate, so that the air boundary layer on the surface of the multiple annular disks is driven by the multiple annular disks to rotate from the inside to the outside due to the viscosity effect to form laminar wind.

2. The ceiling-mounted air conditioner indoor unit according to claim 1, It is characterized in that The partition comprises: a base plate portion, the ventilation opening being provided at the center thereof; and At least one supporting rib extending upward from the periphery of the vent is used to support the heat exchanger upward so as to form a gap between the heat exchanger and the upper surface of the base plate.

3. The ceiling-mounted air conditioner indoor unit according to claim 1, Features Also includes: A mounting plate, fixedly disposed inside the housing; and A fixing frame, comprising a pressing ring and a plurality of connecting arms extending downward from an edge of the pressing ring, wherein the plurality of connecting arms are detachably connected to the mounting plate; and The motor is placed on the mounting plate and is located at the lower side of the pressing ring to be constrained by it, and the rotating shaft of the motor extends upward from the center of the pressing ring.

4. The ceiling-mounted air conditioner indoor unit according to claim 1, It is characterized in that For any two adjacent annular discs, the inner diameter of the annular disc located on the upper side is larger than the inner diameter of the annular disc located on the lower side.

5. The ceiling-mounted air conditioner indoor unit according to claim 1, Features Also includes: The annular air duct is in the shape of a ring with a vertically extending axis. It is arranged in the shell and surrounds the radial outside of the laminar flow fan, and is used to guide the outlet airflow of the laminar flow fan to the at least one air outlet in a preset direction.

6. The ceiling-mounted air conditioner indoor unit according to claim 5, It is characterized in that The annular air duct comprises: The annular top plate and the annular bottom plate are arranged in parallel and spaced apart, the two are coaxial and the axis extends vertically; the annular top plate and the annular bottom plate are flat plates extending in a plane so as to guide the outlet airflow to flow horizontally toward the outlet, or are truncated cone plates extending radially from the inside to the outside gradually downward so as to guide the outlet airflow to flow obliquely downward toward the outlet; and A plurality of connecting strips extending up and down, wherein upper and lower ends of each connecting strip are respectively fixedly connected to the annular top plate and the annular bottom plate.

7. The ceiling-mounted air conditioner indoor unit according to claim 1, It is characterized in that The shell is square in shape as a whole; Among the four sides of the shell, one air outlet is disposed at the lower part of each side; The air inlet is arranged on the upper portion of one or more of the four side surfaces of the shell.

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