CN209840271U - 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 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 heat exchanger is in a flat plate shape and is arranged at the position, close to the air inlet, of the shell; and the rotation axis of the laminar flow fan is vertically arranged in the shell in an extending way, and laminar flow wind is generated by utilizing the viscous effect of air during the operation of the laminar flow fan so as to promote indoor air to enter the shell from the air inlet, exchange heat with the heat exchanger and then blow back to the indoor through the air outlet. The utility model discloses a multi-direction, 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 is at the heat transfer volume that promotes the heat exchanger.

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

the bottom 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 heat exchanger is integrally in a V shape with a downward opening and is arranged at the position of the shell close to the air inlet;

the rotation axis of the laminar flow fan is vertically arranged in the shell in an extending mode, and laminar flow wind is generated by utilizing the viscous effect of air during operation of the laminar flow fan, so that indoor air enters the shell from the air inlet, exchanges heat with the heat exchanger and then is blown back to the indoor through the air outlet.

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 used for driving the plurality of annular discs to rotate so that the air boundary layer on the surfaces of the plurality of annular discs is driven by the plurality of annular discs to rotate from inside to outside due to the viscous effect to form laminar wind.

Optionally, the laminar flow fan further comprises: the circular disk is fixed above the annular disk at intervals in parallel and coaxial with the uppermost annular disk, and the center of the circular disk is sunken downwards to form an accommodating cavity; and the motor is positioned in the containing cavity, the top of the motor is directly or indirectly fixed on the shell, and the bottom of the motor extends out of the rotating shaft to be connected with the circular disk so as to drive the circular disk to rotate and drive the plurality of annular disks to rotate.

Optionally, the laminar flow fan further comprises: and the top ends of the connecting rods vertically extend are fixed on the circular disks, and penetrate downwards to fix the annular disks.

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 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 positioned at 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.

Alternatively, for any adjacent two annular disks, the inner circle diameter of the annular disk located on the upper side is smaller than the inner circle diameter of the annular disk located on the lower side.

Optionally, each air outlet is provided with at least one air deflector for guiding the wind direction.

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 is positioned between the laminar flow fan and the air outlet, and is used for guiding the air outlet flow of the laminar flow fan to the air outlet in a preset direction.

Optionally, 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 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 housing is generally square with an air outlet on each of its four sides.

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. The laminar flow fan realizes annular dead-angle-free air outlet based on the laminar flow principle, and is convenient for realizing multi-directional air supply of the indoor unit. 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 adopts the heat exchanger of "V" type in the suspension type air conditioning. In the same width and depth space, the height of the indoor unit is properly increased, the conventionally adopted flat-plate heat exchanger is changed into a V-shaped heat exchanger, the heat exchanger can be designed to be larger, and the heat exchange quantity of the heat exchanger is larger.

Furthermore, for any two adjacent annular disks, the diameter of the inner circle of the annular disk positioned on the upper side is smaller than that of the inner circle of the annular disk positioned on the lower side, so that air flows to each annular disk 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 an enlarged view at A of FIG. 2;

FIG. 4 is a schematic enlarged view of the bracket of FIG. 2;

FIG. 5 is a schematic structural view of the annular duct of FIG. 2;

fig. 6 is a schematic view showing a structure in which a casing of the ceiling type air conditioner indoor unit shown in fig. 1 is hidden;

FIG. 7 is a schematic diagram of the air supply principle of the laminar flow fan;

FIG. 8 is a bottom perspective view of a laminar flow fan;

FIG. 9 is a schematic cross-sectional view of a plurality of annular disks of a laminar flow fan;

fig. 10 is a schematic view of the air circulation of a laminar flow fan according to an embodiment of the present invention;

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

FIG. 12 is a schematic diagram showing the relationship between the gradual change of the pitch 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 12. 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, and fig. 2 is an exploded schematic view of the ceiling type air conditioning indoor unit shown in fig. 1. Fig. 1 shows the wind outlet direction by arrows.

As shown in fig. 1 and 2, 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 housing 100 has an air inlet 110 at a bottom surface thereof and at least one air outlet 120 at a side surface thereof.

Because the side of the casing of the indoor unit of the ceiling type air conditioner is basically exposed outside, the number of the air outlets 120 can be set as required. 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, the casing 100 may be circular, and the air outlets may be formed at all circumferential angles for air outlet, so as to realize 360 ° all-directional air supply.

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 to form a square ring shape, and the square ring shape is provided with four side surfaces, and the four side surfaces are respectively provided with an air outlet 120 to blow air in four directions. The top plate 104 covers the tops of the two U-shaped side plates, and the bottom plate 103 covers the bottoms of the two U-shaped side plates to jointly enclose a closed space for accommodating the heat exchanger and the laminar flow fan. The intake vent 110 may be in the form of an intake grille disposed in the base plate 103.

The heat exchanger 400 is disposed within the housing 100 and adjacent to the intake vent 110. The heat exchanger 400 may be an evaporator of a vapor compression refrigeration cycle. When the air conditioner is turned on, indoor air enters the casing 100 from the air inlet 110, flows through the heat exchanger 400, exchanges heat with the heat exchanger 400 to become heat exchange air (the heat exchange air is cold air during cooling and hot air during heating), and the heat exchange air is blown back to the indoor space from the air outlet 120 to realize indoor cooling/heating.

The heat exchanger 400 may be a flat plate shape as a whole, but is preferably a "V" shape as shown in fig. 2. In the same width and depth space, the height of the indoor unit is properly increased, the flat plate shape is changed into a V shape, the heat exchanger can be designed to be larger, and the heat exchange quantity is larger.

Fig. 3 is an enlarged view of fig. 2 at a. As shown in fig. 2 and 3, a bottom frame 106 may be installed inside the housing 100. The bottom frame 106 includes a apron 1061 extending vertically and a support flange 1062 extending from the bottom edge of the apron 1061 and bending inward. The heat exchanger 400 is placed in the bottom frame 106, supported by the support flange 1062, and surrounded by the surrounding baffle 1061.

A laminar flow fan 300 is disposed within the housing 100 for powering the airflow flow process described above. The rotation axis of the laminar flow fan 300 extends in the vertical direction (up-down direction), and generates laminar flow wind by the viscosity of air in operation. Laminar flow fan 300 is the axial air inlet, radial air-out structure. The laminar flow fan 300 has air introduced from the bottom thereof to absorb heat exchange air, and has air discharged radially to blow the air horizontally to each of the air outlets 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.

As shown in fig. 2, the laminar flow fan 300 may generally include 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 used for driving the plurality of annular discs 10 to rotate, so that an air boundary layer on the surfaces of the plurality of annular discs 10 is driven by the plurality of annular discs 10 to rotate from inside to outside due to a viscous effect to form laminar wind.

In some alternative constructions, the laminar flow fan 300 further includes a circular disk 30 and a plurality of tie rods 40 extending vertically. The circular disks 30 are coaxial with and spaced parallel above the uppermost annular disk 10. The top end of the connecting rod 40 is fixed to the circular disk 30, and penetrates downward through the plurality of annular disks 10, and is fixed to each annular disk 10, so as to fix the plurality of annular disks 10 and the circular disk 30 to each other.

The center of the circular disk 30 may be depressed downward to form a receiving chamber 31. The motor 20 is located in the accommodating chamber 31, and the top of the motor is directly or indirectly fixed to the housing 100, and the bottom of the motor extends out of the rotating shaft 21. 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.

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 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. More specific principles and structures of the laminar flow fan 300 are described in more detail below.

As shown in fig. 1 and 2, 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 annular duct of FIG. 2; fig. 6 is a schematic view showing a configuration in which a casing of the ceiling type air conditioning indoor unit shown in fig. 1 is hidden.

In some embodiments of the present invention, as shown in fig. 1, 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, and is disposed in the casing 100 and located between the laminar flow fan 300 and the air outlet 120 (i.e., surrounding the laminar flow fan 300). 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, 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, both are coaxial and the axis extends vertically. 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. 1 to 6, the predetermined direction is inclined downward in consideration of the high installation position of the ceiling type air conditioning indoor unit, and therefore, 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. 5, 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.

Of course, the annular top plate and the annular bottom plate may also be flat plates extending in a plane so as to guide the air flow to the air outlet horizontally.

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.

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

The laminar flow fan 300 will be described in detail below with reference to fig. 7 to 12.

Fig. 7 is a schematic diagram of the blowing principle of the laminar flow fan. As shown in fig. 7, 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. 8 is a bottom perspective view of a laminar flow fan; FIG. 9 is a schematic cross-sectional view of a plurality of annular disks of a laminar flow fan; fig. 10 is an air circulation diagram of a laminar flow fan according to an embodiment of the present invention.

As shown in fig. 9 and 10, 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.

In some embodiments, for any adjacent two annular disks 10, the inner circle diameter of the annular disk 10 located on the upper side is smaller than the inner circle diameter of the annular disk 10 located on the lower side. 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 (or from bottom to top). Therefore, when air enters the air inlet channel 11 from bottom to top, 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 disk at the upper side difficultly, and the effect of improving the air volume is finally achieved.

Fig. 11 is a schematic air circulation diagram of a laminar flow fan according to another embodiment of the present invention; FIG. 12 is a schematic diagram showing the relationship between the gradual change of the pitch of a plurality of annular disks and the air volume and the air pressure of a laminar flow fan.

In other embodiments, as shown in fig. 11, the distance between two adjacent annular disks 10 may be gradually increased from bottom to top. Or, the distance between two adjacent annular disks 10 is gradually increased along the direction of the air flow in the air inlet channel 11. Through a plurality of experiments, the air quantity of the laminar flow fan can be effectively improved.

In fig. 12, the abscissa axis shock uniform expansion Plate distance increment refers to the variation of the distance between two adjacent annular discs 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. 12 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 gradually changes from bottom to top, which has a large influence on the air volume and a small influence on the air pressure. When the variation of the distance between two adjacent annular disks 10 along the direction from bottom to top, which is represented by the abscissa axis, is a positive number, it indicates that the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 gradually increases from bottom to top; when the variation of the spacing between two adjacent annular disks 10 along the direction from bottom to top, which is represented by the abscissa axis, is a negative number, it indicates that the spacing between every two adjacent annular disks 10 in the plurality of annular disks 10 gradually decreases from bottom to top. The variation of the interval between the adjacent two annular disks 10 can be made the same. As can be seen from fig. 12, 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. The air volume and the air pressure of the laminar flow fan are comprehensively considered, and the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 is gradually increased from bottom to top. 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 fan are considered comprehensively, and the distance between two adjacent ring disks 10 in the 8 ring disks 10 can be set sequentially from bottom to top: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm and 19.75mm, namely, the distance between two adjacent annular disks 10 increases by 1mm from bottom to top.

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 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 heat exchanger is integrally in a V shape with the opening facing downwards and is arranged at the position, close to the air inlet, of the shell; and

and the rotation axis of the laminar flow fan is vertically arranged in the shell in an extending way, and laminar flow wind is generated by utilizing the viscous effect of air during the operation of the laminar flow fan so as to promote indoor air to enter the shell from the air inlet, exchange heat with the heat exchanger and then blow back to the indoor through the air outlet.

2. 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 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 from inside to outside due to a viscous effect to form laminar wind.

3. The indoor unit of a ceiling type air conditioner as set forth in claim 2, wherein the laminar flow fan further comprises:

the circular disk is fixed above the annular disk at intervals in parallel and coaxial with the uppermost annular disk, and the center of the circular disk is sunken downwards to form an accommodating cavity; and is

The motor is positioned in the containing cavity, the top of the motor is directly or indirectly fixed on the shell, and the bottom of the motor extends out of a rotating shaft to be connected with the circular disk so as to drive the circular disk to rotate and further drive the annular disks to rotate.

4. The indoor unit of a ceiling type air conditioner as set forth in claim 3, wherein the laminar flow fan further comprises:

and the top ends of the connecting rods vertically extend are fixed on the circular disks, and penetrate downwards to fix the annular disks.

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

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

the bracket comprises a 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 positioned 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.

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

for any adjacent two of the annular disks, the inner circle diameter of the annular disk located on the upper side is smaller than the inner circle diameter of the annular disk located on the lower side.

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

and at least one air deflector for guiding the wind direction is arranged at each air outlet.

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 vertically extending, is arranged in the shell and positioned between the laminar flow fan and the air outlet, and is used for guiding the air outlet flow 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 body of the shell is square, and the four side surfaces of the shell are respectively provided with the air outlet.