CN209819689U - Ceiling type air conditioner indoor unit - Google Patents

Abstract

The utility model provides a ceiling type air conditioner indoor unit, which comprises a shell, wherein the bottom surface of the shell is provided with an air inlet, and the side surface of the shell is provided with at least one air outlet; the laminar flow fan is arranged in the shell with a rotation axis extending vertically, sucks air from the axial bottom of the laminar flow fan during operation, generates laminar flow wind by utilizing the viscosity effect of the air and blows the laminar flow wind outwards along the radial direction of the laminar flow fan; and a heat exchanger surrounding the laminar flow fan at a radially outer side thereof; when the laminar flow fan operates, indoor air is promoted to enter the shell from the air inlet, then the indoor air is sucked, blown to the heat exchanger for heat exchange, and finally blown back to the indoor through the air outlet. The utility model discloses a multi-direction of suspension type air conditioning indoor set, air supply on a large scale reduce the air supply noise, have promoted the noise quality.

Description

Ceiling type air conditioner indoor unit

Technical Field

The utility model relates to an air conditioning technology field, in particular to machine in suspension type air conditioning.

Background

The existing air-conditioning indoor unit basically adopts a cross-flow fan, the air outlet direction is right ahead, although the air deflector is used for guiding the air left and right, and the swing blade is used for guiding the air up and down, the air-conditioning indoor unit is limited by a volute structure, the left and right air supply angles are usually smaller than 80 degrees, and the up and down air supply angles are usually smaller than 100 degrees. Therefore, the existing indoor unit has fewer air supply directions and very limited air supply range.

Moreover, current crossflow fans are primarily forward-facing blades that periodically impact the passing airflow, creating significant rotational noise. The volute is matched with the fan to achieve an air supply effect, and the front volute tongue and the rear volute tongue can impact airflow to generate strong turbulence noise. In the prior art, the noise quality is hardly improved obviously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a machine in suspension type air conditioning to realize multi-direction, supply air on a large scale, and reduce the air supply noise, promote the noise quality.

The utility model discloses a further purpose makes the inner structure of machine in suspension type air conditioning compacter to promote the heat exchange efficiency of heat exchanger.

Particularly, the utility model provides a machine in suspension type air conditioning, it includes:

the bottom surface of the shell is provided with an air inlet, and the side surface of the shell is provided with at least one air outlet;

the laminar flow fan is arranged in the shell with a rotation axis extending vertically, sucks air from the axial bottom of the laminar flow fan during operation, generates laminar flow wind by utilizing the viscosity effect of the air and blows the laminar flow wind outwards along the radial direction of the laminar flow fan; and

the heat exchanger surrounds the laminar flow fan on the radial outer side of the laminar flow fan;

when the laminar flow fan operates, indoor air is promoted to enter the shell from the air inlet, then the indoor air is sucked, blown to the heat exchanger for heat exchange, and finally blown back to the indoor through the air outlet.

Optionally, the heat exchanger is in the form of a non-closed ring plate with a notch in the circumferential direction and an axis extending vertically.

Optionally, the ceiling type air conditioner indoor unit further includes: the supporting plate is arranged in the shell, and the upper surface of the supporting plate is provided with two circles of limiting convex ribs; the heat exchanger is arranged on the supporting plate to be supported by the supporting plate, and the bottom of the heat exchanger is positioned between the two circles of limiting convex ribs to be limited by the limiting convex ribs; and the edge of the supporting plate is connected with the inner wall of the shell, and the center of the supporting plate is provided with a vent opposite to the air inlet so as to allow the air flow to the bottom of the laminar flow fan through the vent.

Optionally, the laminar flow fan comprises: a plurality of annular discs which are arranged in parallel at intervals and fixedly connected with each other, and the axes of which extend vertically and are collinear; and the motor is directly or indirectly fixed on the shell and used for driving the plurality of annular discs to rotate, so that an air boundary layer on the surfaces of the plurality of annular discs is driven by the plurality of annular discs to rotate and move from inside to outside in a radial direction due to a viscous effect to form laminar wind.

Optionally, the laminar flow fan further comprises: the circular disk is positioned at the top of the laminar flow fan, arranged in parallel with the annular disk at the uppermost side at intervals and indirectly fixedly connected with the annular disk at the uppermost side, and the center of the circular disk is sunken downwards to form a containing cavity; and the motor extends into the containing cavity, and the rotating shaft of the motor is connected with the circular disk so as to drive the circular disk to rotate, thereby driving the plurality of annular disks to rotate.

Optionally, the ceiling type air conditioner indoor unit further includes: the mounting plate is fixedly arranged on the upper side in the shell; the bracket comprises a horizontally arranged supporting ring and a plurality of connecting arms extending upwards from the edge of the supporting ring, and the connecting arms are detachably connected to the mounting plate; and the motor is arranged on the upper side of the supporting ring to be supported by the supporting ring, and the rotating shaft of the motor extends downwards from the center of the supporting ring.

Optionally, the inner circle diameters of the plurality of annular disks are sequentially reduced along the axial air inlet direction of the laminar flow fan.

Optionally, the ceiling type air conditioner indoor unit further includes: the annular air duct is in an annular shape with an axis extending vertically, is arranged in the shell and surrounds the radial outer side of the laminar flow fan, and is used for guiding the air outlet flow of the laminar flow fan to at least one air outlet in a preset direction.

Optionally, the annular air duct comprises an annular top plate and an annular bottom plate which are arranged in parallel at intervals, and the annular top plate and the annular bottom plate are coaxial and extend vertically along the axis; the annular top plate and the annular bottom plate are flat plates extending in a plane so as to guide the air outlet flow to horizontally flow to the air outlet, or are truncated cone-shaped plates extending downwards from inside to outside in a radial direction so as to guide the air outlet flow to flow downwards in an inclined mode to the air outlet; and the upper end and the lower end of each connecting strip are respectively and fixedly connected with the annular top plate and the annular bottom plate.

Optionally, the whole body of the shell is square, and four side surfaces of the shell are respectively provided with an air outlet.

The utility model discloses a hoist and mount of suspension type air conditioning indoor set is on the roof, and whole casing side is whole to be shown outside, just so can arrange a plurality of air outlets in the side to realize two sides, trilateral, four sides air-out and circumference 360 multi-direction air supplies such as even, air supply range is very big.

Further, the utility model discloses a machine adopts laminar flow fan in suspension type air conditioning, and it realizes that the annular does not have the dead angle air-out based on the laminar flow principle, is convenient for realize the multi-direction air supply of machine in the indoor. And the laminar flow fan applies work by utilizing the viscosity of the air boundary layer, the annular disc is basically parallel to the flowing direction of the air flow, and the impact air flow cannot be disturbed strongly to generate violent vortex, so that the noise is greatly reduced, the noise quality is excellent, and the user experience is obviously improved.

Further, the utility model discloses a machine in suspension type air conditioning sets up the heat exchanger in the radial outside of laminar flow fan, and need not to set up it in laminar flow fan top or below, can practice thrift the inner space of machine in suspension type air conditioning like this, makes its structure compacter, makes the complete machine volume of indoor set littleer. And, because of the heat exchanger surrounds laminar flow fan, make laminar flow fan's air current can more fast comprehensively pass through the heat exchanger surface, make the heat transfer volume and the heat exchange efficiency of heat exchanger all have very big promotion.

Further, the utility model discloses an among the suspension type air conditioning indoor set, along laminar flow fan's axial air inlet direction, the interior circle diameter of a plurality of annular discs diminishes in proper order. Thus, the inlet air flow can flow to each annular disc more uniformly and smoothly, the air quantity is increased, and the operating efficiency of the laminar flow fan is improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a ceiling type air conditioner indoor unit according to an embodiment of the present invention;

fig. 2 is a schematic exploded view of the ceiling type air conditioner indoor unit shown in fig. 1;

fig. 3 is a sectional view taken along a vertical plane of the ceiling type indoor unit of the air conditioner shown in fig. 1;

FIG. 4 is an enlarged schematic view of the fixture of FIG. 2;

fig. 5 is a schematic view of the ceiling type air conditioner indoor unit shown in fig. 1 after a casing is hidden;

FIG. 6 is a schematic structural view of the annular duct of FIG. 5;

fig. 7 is a schematic exploded view of a ceiling type air conditioner indoor unit according to another embodiment of the present invention;

FIG. 8 is a schematic diagram of the air supply principle of the laminar flow fan;

FIG. 9 is a bottom perspective view of the laminar flow fan of FIG. 1;

FIG. 10 is a schematic cross-sectional view of a plurality of annular disks of the laminar flow fan of FIG. 1;

FIG. 11 is a schematic view of the air circulation of the laminar flow fan of the embodiment of FIG. 1;

fig. 12 is a schematic air circulation diagram of a laminar flow fan according to another embodiment of the present invention;

FIG. 13 is a schematic diagram showing the relationship between the gradual pitch change of a plurality of annular disks and the air volume and the air pressure of a laminar flow fan.

Detailed Description

A ceiling type air conditioning indoor unit according to an embodiment of the present invention will be described with reference to fig. 1 to 13. Where the orientations or positional relationships indicated by the terms "front", "back", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc., are based on the orientations or positional relationships shown in the drawings, they are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

The indoor unit of ceiling type air conditioner of the embodiment of the present invention constitutes a vapor compression refrigeration cycle system together with an outdoor unit of air conditioner (not shown), and realizes the refrigeration/heating of the indoor environment.

Fig. 1 is a schematic structural view of a ceiling type air conditioning indoor unit according to an embodiment of the present invention, fig. 2 is an exploded schematic view of the ceiling type air conditioning indoor unit shown in fig. 1, and fig. 3 is a sectional view of the ceiling type air conditioning indoor unit shown in fig. 1, which is cut along a vertical plane.

As shown in fig. 1 to 3, a ceiling type air conditioning indoor unit according to an embodiment of the present invention may generally include a casing 100, a heat exchanger 400, and a laminar flow fan 300.

The ceiling type air conditioner indoor unit is integrally hung below an indoor roof, and the top of the casing 100 is used for being connected with the roof. The bottom surface of the housing 100 is provided with an air inlet 110, and the side surface thereof is provided with at least one air outlet 120. So as to realize air inlet from the lower part and air outlet from the side surface.

The side of the casing of the indoor unit of the ceiling type air conditioner is basically and completely exposed outside, the air outlets can be conveniently arranged on the side of the casing, and the number of the air outlets can be set according to the requirement. For example, if the indoor unit is installed on the roof near the side wall, only one air outlet may be provided. If the installation position of this indoor set is kept away from the side wall, if set up in roof central authorities, can set up if two, three, four etc. a plurality of air outlets towards the diverse to realize multidirectional air supply effects such as two-sided air-out, trilateral air-out, four sides air-out. Even, can make the casing be circular, its circumference full angle all sets up the air outlet and is used for the air-out to realize 360 all-round air supplies.

The utility model discloses a multi-direction air supply, and air supply range is very big. And, because of the ceiling type air conditioner indoor set mounted position is higher, its air-out coverage is also very big, does benefit to promote refrigeration/heating speed, and makes the user more comfortable.

An alternative configuration of the housing 100 is shown in fig. 2. The housing 100 is generally square and includes two oppositely disposed "U" shaped side plates 101, 102, a top plate 104 and a bottom plate 103. Two straight edges of each U-shaped side plate extend along the vertical direction. The two U-shaped side plates are connected in a straight line edge way to form a square ring shape and are provided with four side surfaces. In the four side surfaces, each side surface is provided with an air outlet 120 for blowing air in four directions.

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 enclose a closed space for accommodating the heat exchanger 400 and the laminar flow fan 300. The air inlet 110 is disposed on the bottom plate 103, and may be specifically configured in the form of an air inlet grille. As shown in fig. 2.

As shown in fig. 2 and 3, the rotation axis of the laminar flow fan 300 is vertically extended and disposed in the housing 100, and a side circumferential surface thereof may be opposite to the outlet port 120. The laminar flow fan 300 operates to suck air from the axial bottom thereof and then generate laminar flow wind by utilizing the viscosity effect of the air and blow it radially outward.

The heat exchanger 400 surrounds the laminar flow fan 300 radially outward of the laminar flow fan 300. The heat exchanger 400 may be an evaporator of a vapor compression refrigeration cycle. When the laminar flow fan 300 operates, indoor air is forced to enter the casing 100 from the air inlet 110, and then the air is sucked into the laminar flow fan 300, blown to the heat exchanger 400 for heat exchange, and finally blown back to the indoor through the air outlet 120. The above process is cycled to achieve cooling/heating of the indoor environment. Fig. 3 illustrates the direction of the wind with arrows.

As shown in fig. 2 and 3, the heat exchanger 400 may be a non-closed ring plate (circular, square, or irregular) having a gap 401 in the circumferential direction and extending vertically. It will be appreciated that the present embodiment is based on process considerations in designing the heat exchanger 400 as a non-closed loop plate, although it may be designed as a closed loop plate.

In the embodiment, the heat exchanger 400 is arranged at the radial outer side of the laminar flow fan 300, and is not required to be arranged above or below the laminar flow fan 300, so that the inner space of the ceiling type air conditioner indoor unit can be saved, the structure of the ceiling type air conditioner indoor unit is more compact, and the overall volume of the indoor unit is smaller. Moreover, the heat exchanger 400 surrounds the laminar flow fan 300, so that the airflow of the laminar flow fan 300 can more rapidly and comprehensively pass through the surface of the heat exchanger 400, and the heat exchange amount and the heat exchange efficiency of the heat exchanger 400 are greatly improved.

As shown in fig. 2, a supporting plate 800 is also fixedly installed in the housing 100. The tray 800 is mounted on the bottom side of the interior of the housing 100. Two circles of limiting convex ribs are formed on the upper surface of the supporting plate 800, namely an outer circle of limiting convex ribs 810 and an inner circle of limiting convex ribs 820, and the distance between the two is approximately equal to the thickness of the heat exchanger 400. The heat exchanger 400 is mounted on the pallet 800 to be supported thereby. And, the heat exchanger 400 is located between two circles of the limit ribs 810, 820, that is, the lower end thereof is clamped between the two limit ribs to be limited, so that the position thereof is more stable.

The edge of the supporting plate 800 is hermetically connected to the inner wall of the housing 100 to prevent the airflow from passing through, and the center of the supporting plate 800 is provided with a ventilation opening 801 opposite to the air inlet 110 to allow the intake airflow to flow to the bottom of the laminar flow fan 300 through the ventilation opening 801. In addition, as shown in fig. 3, after the intake air passes through the air inlet 801, all of the intake air is sucked into the laminar flow fan 300, and does not directly flow to the heat exchanger 400 without the action of the laminar flow fan 300, thereby affecting the heat exchange efficiency.

Referring to fig. 2 and 3, the laminar flow fan 300 includes a plurality of annular disks 10 and a motor 20. A plurality of annular discs 10 are arranged in parallel at intervals and fixedly connected with each other, and the axes of the annular discs extend vertically and are collinear. The motor 20 is directly or indirectly fixed to the casing 100 and is configured to drive the plurality of annular disks 10 to rotate, so that an air boundary layer on the surfaces of the plurality of annular disks 10 is driven by the plurality of annular disks 10 to rotate and move radially from inside to outside due to a viscous effect to form a laminar wind.

As shown in fig. 2 and 3, laminar flow fan 300 may also include a circular disk 30. The circular disk 30 is located on the top of the laminar flow fan 300, and is spaced apart from and indirectly fixedly connected to the uppermost annular disk 10. The center of the circular disk 30 is depressed downward to form a receiving chamber 31. Motor 20 extends into accommodation chamber 31, and its rotation shaft 21 is connected to circular disk 30 to drive circular disk 30 to rotate, thereby driving a plurality of annular disks 10 to rotate.

Referring to fig. 11, the laminar flow fan 300 may further include a plurality of connecting rods 40 extending vertically. The connecting rod 40 has one end fixed to the circular disk 30, and then extends vertically to penetrate the plurality of annular disks 10 and is fixed to each of the plurality of annular disks 10, so as to fix the plurality of annular disks 10 and the circular disk 30 to each other.

Laminar flow fan 300 is the axial air inlet, radial air-out structure. It sucks air axially and blows out air radially to blow the air horizontally to each air outlet 120. Laminar flow fan 300 realizes the air-out of annular no dead angle based on the laminar flow principle. Moreover, the laminar flow fan 300 applies work by using the viscosity of the air boundary layer, the annular disk 10 is basically parallel to the flowing direction of the air flow, and the impact air flow is not disturbed strongly to generate severe vortex, so that the noise is greatly reduced, the noise quality is excellent, and the user experience is obviously improved. More specific principles and structures of the laminar flow fan 300 are described in more detail below.

Fig. 4 is a schematic enlarged view of the bracket in fig. 2. Referring now to fig. 2 and 4, one manner of coupling the motor 20 to the housing 100 will be described.

The ceiling type air conditioning indoor unit includes a mounting plate 105 and a bracket 50. The mounting plate 105 is fixedly disposed at an inner upper side of the housing 100. The bracket 50 includes a horizontally disposed ring 51 and a plurality of connecting arms 52 (at least two, e.g., three as shown in fig. 4). The ring 51 has a hollow ring shape. The connecting arm 52 extends upwardly from the edge of the ring 51 and has an upper end that is removably connected to the mounting plate 105, preferably by a threaded connection. The motor 20 is placed on an upper side of the holder ring 51 to be supported thereby, and the rotation shaft 21 of the motor 20 is protruded downwardly from the center of the holder ring 51. In this manner, the ring 51 bears the weight of the entire laminar flow fan 300 by supporting the motor 20.

As shown in fig. 1 and 3, at least one wind deflector 600 for guiding a wind direction is disposed at each wind outlet 120. The wind deflector 600 is elongated with a length direction parallel to the horizontal direction, and a rotation axis thereof is parallel to the length direction. When the plurality of wind deflectors 600 are provided, the plurality of wind deflectors 600 are arranged from top to bottom.

The wind deflector 600 can rotate to open or close the wind outlet 120, and the wind outlet direction of the wind outlet 120 can be changed by rotating the wind deflector 600 to different angles. The air deflector 600 can be driven to rotate by a motor, and specific driving mechanisms are not described in detail.

Fig. 5 is a schematic structural view of the ceiling type air conditioning indoor unit shown in fig. 1 after a casing is hidden, and fig. 6 is a schematic structural view of an annular duct shown in fig. 5.

In some embodiments of the present invention, as shown in fig. 3, 5 and 6, the ceiling type air conditioner indoor unit further includes an annular air duct 700. The annular air duct 700 is in the shape of a ring with a vertical axis, is disposed in the casing 100, and is located between the laminar flow fan 300 and the air outlet 120, and surrounds the laminar flow fan 300 radially outside. The annular air duct 700 is used for guiding the outlet airflow of the laminar flow fan 300 to the air outlet 120 in a preset direction.

As shown in fig. 5 and 6, 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 positioned above the annular bottom plate 720 and the two are spaced apart in parallel. Furthermore, the two are coaxial and the axis extends in the vertical direction. The upper and lower ends of each connecting strip 730 are fixedly connected with the annular top plate 710 and the annular bottom plate 720 respectively. The connecting bar 730 should be disposed at a position away from the air outlet 120 to prevent the air outlet from being blocked.

In the embodiment shown in fig. 5 and 6, the predetermined direction is inclined downward in consideration of the high installation position of the ceiling type air conditioning indoor unit, and thus the annular top plate 710 and the annular bottom plate 720 are truncated conical plates extending downward from inside to outside in the radial direction so as to guide the air downward. Referring to fig. 6, a line L represents an extending direction of the upper surface of the annular base plate 720, and a line L1 represents a horizontally extending line, which are sandwiched at an acute angle. In some alternative configurations, the annular top plate and the annular bottom plate may also be flat plates extending in a plane so as to direct the flow of outlet air horizontally toward the outlet opening.

In the embodiment, the annular air duct 700 is utilized to guide more air flow of the laminar flow fan to the air outlet 120 more smoothly, so as to reduce energy loss and noise caused by vortex.

Fig. 7 is a schematic exploded view of a ceiling type air conditioning indoor unit according to another embodiment of the present invention. In the embodiment shown in fig. 7, compared with the embodiments shown in fig. 1 to 6, the annular air duct 700 is omitted, so that the air flows to the air outlet in an unguided manner, which can save cost.

Fig. 8 is a schematic diagram of the blowing principle of the laminar flow fan. As shown in fig. 8, the blowing principle of the laminar flow fan is mainly derived from a "tesla turbine" found in nigula tesla. Tesla turbines mainly utilize the 'laminar boundary layer effect' or 'viscous effect' of the fluid to achieve the purpose of doing work on 'turbine disks'. When the annular disks 10 rotate at a high speed, air in the spaces of the annular disks 10 contacts and moves with each other, and an air boundary layer 13 close to the surface of each annular disk 10 is driven by the rotating annular disks 10 to rotate from inside to outside to form laminar air under the action of viscous shear force tau.

FIG. 9 is a bottom perspective view of the laminar flow fan of FIG. 1; FIG. 10 is a schematic cross-sectional view of a plurality of annular disks of the laminar flow fan of FIG. 1; fig. 11 is a schematic view of air circulation of the laminar flow fan of the embodiment shown in fig. 1.

As shown in fig. 10 and 11, an air inlet passage 11 is formed at the center of the annular disk 10 to allow external air to enter. A plurality of air outlet channels 12 are formed in gaps between the plurality of annular disks 10 for blowing out laminar air. The process of the laminar wind formed by the air boundary layer 13 rotating from inside to outside is centrifugal motion, so that the speed of the laminar wind leaving the air outlet channel 12 is higher than that of the laminar wind entering the air inlet channel 11.

The inner circle diameters of the respective annular disks of the laminar flow fan 300 may be made different from each other. For example, the inner circle diameters of the plurality of annular disks 10 are sequentially made smaller in the axial air intake direction of the laminar flow fan 300 (from the bottom to the top in the embodiment shown in fig. 1 to 11). In other words, the inner circle diameter of the annular disk 10 is gradually reduced in the direction in which the air flow flows in the intake air passage 11. Therefore, when air enters the air inlet channel 11 from top to bottom, the air flows at different positions in the radial direction respectively correspond to different annular disks 10, so that the air can flow to the annular disks more uniformly, the air is prevented from entering the annular disks at the lower side difficultly, and the effect of improving the air volume is finally achieved.

Fig. 12 is a schematic air circulation diagram of a laminar flow fan according to another embodiment of the present invention; FIG. 13 is a schematic diagram showing the relationship between the gradual pitch change of a plurality of annular disks and the air volume and the air pressure of a laminar flow fan.

In other embodiments, the spacing between adjacent annular disks of the laminar flow fan 300 may be different. As shown in fig. 12, the distance between each two adjacent annular disks 10 may be gradually increased along the axial air intake direction of the laminar flow fan 300. Or, the distance between each two adjacent annular disks is gradually increased along the direction of the air flow flowing in the air inlet channel 11. Through a plurality of experiments, the air quantity of the laminar flow fan can be effectively improved. With particular reference to fig. 13.

In fig. 13, the abscissa axis shock uniform expansion Plate distance increment refers to the variation of the distance between two adjacent annular disks 10 along the direction from bottom to top, the left ordinate axis Mass flow rate refers to the air volume, the right ordinate axis Pressure refers to the air Pressure, and the air Pressure refers to the Pressure difference between the inlet of the air outlet channel 12 and the inlet of the air inlet channel 11 of the laminar flow fan. Also, the variation amount of the pitch between two adjacent annular disks 10 is the same, that is, the increase or decrease of the pitch between two adjacent annular disks 10 is the same.

Specifically, fig. 13 is a schematic diagram illustrating the relationship between the gradual change of the pitch of the plurality of ring disks 10 and the air volume and the air pressure when the outer diameter, the inner diameter, the number, the thickness of the ring disks 10 and the rotation speed of the motor 20 of the laminar flow fan are all kept constant. When all the above mentioned parameters are kept unchanged, in the plurality of annular disks 10, the distance between every two adjacent annular disks 10 is gradually changed, so that the influence on the air volume is large, and the influence on the air pressure is small. When the variation of the distance between two adjacent annular disks 10 along the axial air inlet direction is a positive number, the distance is gradually increased; when the variation of the distance between two adjacent annular disks 10 along the axial air inlet direction is negative, the distance is gradually reduced. The variation of the interval between the adjacent two annular disks 10 can be made the same. As can be seen from fig. 13, when the variation of the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 is-1 mm, 1mm and 2mm, the air volume and the air pressure of the laminar flow fan are both greatly improved.

Considering the air volume and the air pressure of the laminar flow fan together, it is preferable that the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 is set to be gradually increased along the axial air intake direction. For example, the outer diameter of the ring disk 10 is 175mm, the inner diameter of the ring disk 10 is 115mm, the number of the ring disks 10 is 8, the thickness of the ring disk 10 is 2mm, and the rotation speed of the motor 20 is 1000rpm (revolutions per minute), at this time, the air volume and the air pressure of the laminar flow fan are considered comprehensively, for example, the distance between two adjacent ring disks 10 in 8 ring disks 10 may be set sequentially along the axial air inlet direction: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm, 19.75 mm.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A ceiling type air conditioner indoor unit, characterized by comprising:

the bottom surface of the shell is provided with an air inlet, and the side surface of the shell is provided with at least one air outlet;

the laminar flow fan is arranged in the shell with a rotating axis extending vertically, sucks air from the axial bottom of the fan during operation, generates laminar flow wind by utilizing the viscosity effect of the air and blows the laminar flow wind outwards along the radial direction of the fan; and

a heat exchanger surrounding the laminar flow fan radially outside thereof;

when the laminar flow fan operates, indoor air is promoted to enter the shell from the air inlet, then the indoor air is sucked, blown to the heat exchanger for heat exchange, and finally blown back to the indoor through the air outlet.

2. The indoor unit of a ceiling type air conditioner as set forth in claim 1,

the whole heat exchanger is in a non-closed ring plate shape, the axis of the non-closed ring plate shape extends vertically, and the periphery of the non-closed ring plate shape is provided with a notch.

3. The indoor unit of a ceiling type air conditioner as set forth in claim 2, further comprising:

the supporting plate is arranged in the shell, and the upper surface of the supporting plate is provided with two circles of limiting convex ribs;

the heat exchanger is arranged on the supporting plate to be supported by the supporting plate, and the bottom of the heat exchanger is positioned between the two circles of limiting convex ribs to be limited by the two circles of limiting convex ribs; and is

The edge of the supporting plate is connected with the inner wall of the shell, and the center of the supporting plate is provided with a vent opposite to the air inlet so as to allow air inlet flow to the bottom of the laminar flow fan through the vent.

4. The indoor unit of a ceiling type air conditioner of claim 1, wherein the laminar flow fan comprises:

a plurality of annular discs which are arranged in parallel at intervals and fixedly connected with each other, and the axes of which extend vertically and are collinear; and

and the motor is directly or indirectly fixed on the shell and used for driving the plurality of annular discs to rotate, so that an air boundary layer on the surfaces of the plurality of annular discs is driven by the plurality of annular discs to rotate and move from inside to outside in a radial direction due to a viscous effect to form laminar wind.

5. The indoor unit of a ceiling type air conditioner as set forth in claim 4, wherein the laminar flow fan further comprises:

the circular disk is positioned at the top of the laminar flow fan, arranged in parallel with the annular disk at the uppermost side at intervals and indirectly fixedly connected with the annular disk at the uppermost side, and the center of the circular disk is sunken downwards to form an accommodating cavity; and is

The motor extends into the containing cavity, and the rotating shaft of the motor is connected with the circular disk so as to drive the circular disk to rotate, thereby driving the plurality of annular disks to rotate.

6. The indoor unit of a ceiling type air conditioner as set forth in claim 4, further comprising:

the mounting plate is fixedly arranged on the upper side in the shell; and

the bracket comprises a horizontally arranged supporting ring and a plurality of connecting arms extending upwards from the edge of the supporting ring, and the connecting arms are detachably connected to the mounting plate; and is

The motor is arranged on the upper side of the supporting ring to be supported by the supporting ring, and a rotating shaft of the motor extends downwards from the center of the supporting ring.

7. The indoor unit of a ceiling type air conditioner as set forth in claim 4,

and along the axial air inlet direction of the laminar flow fan, the diameters of the inner circles of the annular discs are sequentially reduced.

8. The indoor unit of a ceiling type air conditioner as set forth in claim 1, further comprising:

and the annular air duct is in an annular ring shape with the axis extending vertically, is arranged in the shell and surrounds the radial outer side of the laminar flow fan, and is used for guiding the air outlet airflow of the laminar flow fan to the at least one air outlet in a preset direction.

9. The indoor unit of a ceiling type air conditioner as claimed in claim 8, wherein the annular duct comprises:

the annular top plate and the annular bottom plate are arranged in parallel at intervals, and are coaxial, and the axes of the annular top plate and the annular bottom plate vertically extend; the annular top plate and the annular bottom plate are flat plates extending in a plane so as to guide the air outlet flow to horizontally flow to the air outlet, or are truncated cone-shaped plates extending downwards from inside to outside in a radial direction so as to guide the air outlet flow to obliquely flow downwards to the air outlet; and

and the upper end and the lower end of each connecting strip are respectively and fixedly connected with the annular top plate and the annular bottom plate.

10. The indoor unit of a ceiling type air conditioner as set forth in claim 1,

the whole casing is square, and its four sides respectively are provided with one the air outlet.