CN209744534U - 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 top part is used for being fixed on a roof, the bottom part is provided with an air inlet, and the side part is provided with an air supply outlet; the heat exchanger is positioned in the shell; the laminar flow fan is used for promoting indoor air to enter the shell from the air inlet to exchange heat with the heat exchanger and then flow to the air supply outlet, the laminar flow fan comprises a plurality of annular discs, the annular discs are arranged in parallel at intervals and fixedly connected with each other, axes of the annular discs extend along the vertical direction and are collinear, each annular disc is composed of an annular inner ring and an outer ring extending outwards from the radial outer edge of the inner ring, and the outer ring and the inner ring are clamped by a preset obtuse angle so that the air outlet direction is matched with the air supply direction of the air supply outlet; the motor is used for driving the plurality of annular discs to rotate, so that an air boundary layer close to the surfaces of the annular discs is driven by the annular discs to rotate from inside to outside due to a viscous effect to form laminar wind. The utility model discloses in, laminar flow fan's air-out direction more matches with the air supply direction of supply-air outlet to reduce the windage that results in because of the wind path is buckled.

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 fan used in the indoor unit of the air conditioner is mainly a centrifugal fan or a cross flow fan. However, the centrifugal fan and the cross flow fan used in the air conditioner have more problems.

the centrifugal fan needs dozens of large-volume blades to improve the wind pressure and the wind volume, so that the noise is high. Although the noise of the cross flow fan is low, the wind pressure is too small, and the air supply distance is short. And the whole volume of the cross flow fan is large, and the actual effective volume is small, so that the space waste is caused.

SUMMERY OF THE UTILITY MODEL

an object of the utility model is to provide a machine in little, the high suspension type air conditioning of noise.

The utility model discloses a another aim is to make laminar flow fan's air-out direction and the air supply direction of supply-air outlet more match to reduce the windage that results in because of the wind path is buckled.

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

The top of the shell is used for being fixed on a roof, the bottom of the shell is provided with an air inlet, and the side of the shell is provided with at least one air supply outlet;

The heat exchanger is arranged in the shell;

laminar flow fan sets up in the casing for make indoor air from the air intake entering casing, with the heat exchanger heat transfer after, flow to the supply-air outlet again, laminar flow fan includes:

the annular disks are arranged in parallel at intervals, fixedly connected and collinear, the axes of the annular disks extend along the vertical direction, each annular disk is composed of an annular inner ring and an outer ring extending outwards from the radial outer edge of the inner ring, and the outer ring and the inner ring are clamped by a preset obtuse angle so that the air outlet direction of the annular disks is matched with the air supply direction of the air supply opening; and

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

Optionally, each air supply outlet is used for supplying air obliquely downwards; the inner ring and the outer ring are both flat-shaped, and the inner ring extends along the horizontal direction; and the outer ring turns extend outwardly and gradually downwardly from the radially outer edge of the inner ring turns.

Optionally, the ratio of the outer diameter of the inner collar to the outer diameter of the outer collar is between 0.6 and 0.8.

Alternatively, the heat exchanger is an arc-shaped plate whose axis extends in the vertical direction, which surrounds the laminar flow fan radially outward of the laminar flow fan.

optionally, the laminar flow fan further comprises a circular disk, which is above and fixedly connected with the annular disk at the uppermost side; the motor is fixed on the shell, and the rotating shaft of the motor is connected with the circular disk to drive the circular disk to rotate.

Optionally, the laminar flow fan further comprises a plurality of connecting rods, each connecting rod penetrating through the circular disk and the plurality of annular disks to fixedly connect the plurality of annular disks to the circular disk.

optionally, for a plurality of annular disks, the distance between two adjacent annular disks gradually increases from bottom to top.

optionally, the ceiling type air conditioner indoor unit further includes: and the flow guide disc is arranged below the shell and used for guiding indoor air to flow to the air inlet from all positions on the periphery of the flow guide disc through a gap between the flow guide disc and the shell.

optionally, the deflector has a tapered guide ramp sloping gradually downwardly from its center to its periphery to guide the air to flow obliquely upwardly to enter the air inlet.

Optionally, at least one air outlet duct which is used for being matched with the at least one air supply outlet one by one is arranged in the shell; each air outlet channel is used for guiding the air flow flowing out of the heat exchanger to the corresponding air supply opening part obliquely below.

The utility model discloses a machine adopts laminar flow fan to supply air in suspension type air conditioner, and laminar flow fan realizes the laminar flow air supply through the viscidity effect, reduces the use of traditional fan to the blade, can not increase the requirement that the blade can satisfy the amount of wind even, and air supply process small in noise, wind gauge height effectively promote user's use and experience. Furthermore, the utility model discloses make laminar flow fan's outer ring circle and the preset obtuse angle of inner ring circle centre gripping, be in order to make its air supply direction with the supply-air outlet more match (unanimous) to with can reduce like this because of the windage that the wind path is buckled and is leaded to, promote fan efficiency.

Further, the utility model discloses an among the suspension type air conditioning indoor set, interval between two adjacent ring disc pieces of laminar flow fan is by lower supreme crescent, can effectively promote laminar flow fan's the amount of wind for laminar flow fan's air-out satisfies user's user demand.

Further, the utility model discloses an among the suspension type air conditioning indoor set, the below of casing bottom air intake still sets up the guiding plate, makes wind flow to the air intake from the clearance between guiding plate and the casing. Compared with the scheme that wind directly vertically enters the shell from the bottom of the shell upwards, the bottom appearance (the bottom of the top-hung indoor unit mainly faces a user) of the top-hung indoor unit is more attractive due to the arrangement of the flow guide disc, and the influence of the complex air inlet grille arranged at the bottom of the shell on the appearance is avoided. Moreover, the air inlet direction is close to the horizontal direction, the air outlet direction is also close to the horizontal direction, and the included angle between the air inlet direction and the air outlet direction is smaller, so that the energy consumption and the noise of the fan are reduced.

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 side view of a ceiling type air conditioner indoor unit according to an embodiment of the present invention;

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

Fig. 3 is a sectional view a-a of the ceiling type indoor unit of the air conditioner shown in fig. 1;

fig. 4 is a schematic view of the overall structure of a laminar flow fan according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view B-B of the laminar flow fan of FIG. 4;

FIG. 6 is a schematic bottom view of the laminar flow fan of FIG. 4;

Fig. 7 is a schematic diagram of an air supply principle of a laminar flow fan according to an embodiment of the present invention;

fig. 8 is a velocity profile and force profile of a laminar flow fan according to an embodiment of the present invention;

fig. 9 is a schematic air circulation diagram of a laminar flow fan according to an embodiment of the present invention;

Fig. 10 is a schematic diagram illustrating a relationship between gradual pitch change of a plurality of annular disks and air volume and air pressure of a laminar flow fan according to an embodiment of the present invention;

Fig. 11 is a schematic diagram illustrating a relationship between a motor rotation speed and an air volume and an air pressure of a laminar flow fan according to an embodiment of the present invention.

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 11. 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 side view of a ceiling type air conditioner indoor unit according to an embodiment of the present invention; fig. 2 is a schematic bottom view of the ceiling type air conditioner indoor unit shown in fig. 1; fig. 3 is a sectional view a-a of the ceiling type indoor unit of the air conditioner shown in fig. 1; fig. 4 is a schematic view of the overall structure of a laminar flow fan according to an embodiment of the present invention.

As shown in fig. 1 to 4, 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-mounted type air conditioning indoor unit is integrally installed under an indoor roof (the roof is illustrated with a dotted line in fig. 1), the top of the casing 100 is used to be fixed to the roof, and the rest of the air conditioning indoor unit is exposed under the roof.

The housing 100 has an air inlet 110 at the bottom and at least one air blowing opening 120 at the side. Since the indoor unit is already at a high position, the air outlet 120 can be inclined downward to supply air. As shown in fig. 3, the casing 100 has at least one air outlet duct 150 inside, which is matched with the air supply outlets 120 one by one. An outlet of each air outlet duct 150 is opposite to a corresponding air supply outlet 120, and is used for guiding the airflow flowing out of the heat exchanger 400 to the air supply outlet 120. The air outlet duct 150 guides the wind obliquely downward.

The number of the air blowing ports 120 may be one or more. As shown in fig. 2, the casing 100 has a square structure, and four air blowing ports 120 are arranged along the circumferential direction of the casing 100 to realize air blowing in four directions. Of course, more air supply ports 120 may be arranged along the circumferential direction of the casing 100 to supply air in more directions. Even, the casing 100 may be circular, and the air supply opening 120 may be formed at a circumferential full angle for air supply, so as to realize 360 ° all-directional air supply. In addition, because of the higher mounted position of the indoor unit of the ceiling type air conditioner, the air-out coverage range is also very large, the refrigerating/heating speed is favorably improved, and the user feels more comfortable.

the heat exchanger 400 may be an evaporator of a vapor compression refrigeration cycle, which is disposed within the casing 100 (see fig. 3). After the indoor air enters the casing 100 from the air inlet 110, the indoor air is heat-exchanged with the heat exchanger 400 to become heat-exchanged air (the heat-exchanged air is cold air during cooling, and the heat-exchanged air is hot air during heating) and flows to the air supply outlet 120, so that the indoor cooling/heating is realized.

the laminar flow fan 300 is disposed in the casing 100, and is configured to promote indoor air to enter the casing 100 from the air inlet 110, exchange heat with the heat exchanger 400, and then flow to the air supply outlet 120. The laminar flow fan 300 includes a plurality of annular disks 10 and a motor 20. Wherein, a plurality of annular disc 10 parallel interval sets up and mutual fixed connection, axis all extend and collineation along vertical direction. The motor 20 is used for driving the plurality of annular discs 10 to rotate, so that an air boundary layer close to 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. The air boundary layer 13 is a very thin layer of air adjacent to the surface of each disk. The air supply process of the laminar flow fan 300 is low in noise and high in air volume, and the use experience of a user is effectively improved.

the heat exchanger 400 may be an arc-shaped plate whose axis extends in a vertical direction, and surrounds the laminar flow fan 300 at a radially outer side of the laminar flow fan 300, so that the laminar flow fan 300 and the laminar flow fan are spaced closer to each other, and wind energy of the laminar flow fan 300 is blown to the heat exchanger 400 more fully and completely.

FIG. 5 is a cross-sectional view B-B of the laminar flow fan of FIG. 4; fig. 6 is a schematic bottom view of the laminar flow fan shown in fig. 4. As shown in fig. 5 and 6, the laminar flow fan 300 discharges air radially outward, so that the air discharge direction is more parallel to the air supply direction of the air supply opening 120, thereby reducing the wind resistance caused by bending of the air path. The utility model discloses make every annular disc 10 constitute by annular sheet's inner ring circle 101 and annular sheet's outer ring circle 102 very much to make outer ring circle 102 (place plane) and inner ring circle 101 (place plane) centre gripping predetermine the obtuse angle, so that outer ring circle 102 place plane is unanimous with the air supply direction of supply-air outlet 120. For example, as shown in fig. 3, the air supply port 120 supplies air obliquely downward, so that the outer ring 102 extends outward from the radially outer edge of the ring 101 and gradually inclines downward. Thus, the air flows radially outward from the inner ring 101 to the outer ring 102, and obliquely downward toward the air blowing port 120 by being guided by the gap between the adjacent outer rings 102. The inner ring 101 and the outer ring 102 can be both flat, and the inner ring 101 extends in the horizontal direction, so that air can be supplied more smoothly.

since the outer ring 102 is mainly used to guide the wind to blow obliquely, a certain width (the distance between the inner edge and the outer edge) is required to ensure the guiding effect. However, too large a width may reduce the width of the inner ring 101, which may result in a loss of air supply. The inventor has found through many experiments that the ratio of the outer diameter of the inner ring 101 to the outer diameter of the outer ring 102 is between 0.6 and 0.8 (as shown in fig. 5, the outer diameter of the inner ring 101 is a1, the outer diameter of the outer ring 102 is a2, and a1/a2 is the ratio of the outer diameters).

As shown in fig. 3, the heat exchanger 400 may be an arc plate whose axis extends in the vertical direction (considering the manufacturing process, it is not an entire arc, but an optimal arc), and is disposed close to the radial inner side of the plurality of annular disks 10, so that it is closer to the annular disks 10, and is more favorable for absorbing the airflow from the heat exchanger 400.

As shown in fig. 5 and 6, the laminar flow fan 300 further includes a circular disk 30. The circular disk 30 is positioned above the uppermost annular disk 10 and is fixedly connected thereto. The motor 20 is fixed to the casing 100 and extends into the air inlet channel 11 (the specific position of the air inlet channel is shown in fig. 9) at the radial inner side of the plurality of annular disks 10, and the rotating shaft thereof is connected to the circular disk 30 to drive the circular disk 30 to rotate, so as to drive the plurality of annular disks 10 to rotate. The radius of the circular disk 30 and the outer diameter of the plurality of annular disks 10 may be the same and may be set to be 170mm to 180mm, thereby restricting the occupied volume of the laminar flow fan 300 in the lateral direction.

The laminar flow fan 300 may also include a plurality of connecting rods 40. Each tie bar 40 may extend through circular disk 30 and plurality of annular disks 10 to connect the plurality of annular disks 10 to circular disk 30. The connecting rods 40 penetrate through the edges of the circular disk 30 and the annular disks 10 at regular intervals to ensure that the connection relationship between the circular disk 30 and the annular disks 10 is stable, so that when the motor 20 drives the circular disk 30 to rotate, the circular disk 30 can stably drive the annular disks 10 to rotate, and the operational reliability of the laminar flow fan 300 is improved.

Considering that the thickness of the laminar flow fan 300 cannot be too large, the number of the annular disks 10, the distance between two adjacent annular disks 10, and the thickness of the annular disks 10 need to be correspondingly restricted. In addition, the volume occupied by the laminar flow fan 300 cannot be too large, and the outer diameter of the annular disk 10 needs to be correspondingly restricted. It should be noted that the outer diameter of the annular disk 10 refers to the radius of the outer circumference of the annular disk 10, and the inner diameter of the annular disk 10 refers to the radius of the inner circumference of the annular disk 10.

Fig. 7 is a schematic diagram of an air supply principle of a laminar flow fan according to an embodiment of the present invention; fig. 8 is a velocity profile and force profile of a laminar flow fan according to an embodiment of the present invention.

as shown in fig. 7 and 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'. In the laminar flow fan of this embodiment, the motor 20 drives the circular disk 30, the circular disk 30 drives the plurality of annular disks 10 to rotate at a high speed, and the air in the gaps between the annular disks 10 contacts and moves with each other, so that the air boundary layer 13 near the surfaces of the annular disks 10 is driven by the rotating annular disks 10 to rotate from inside to outside under the action of the viscous shear force τ to form laminar flow wind.

fig. 8 is a schematic diagram showing the viscous shear force distribution τ (y) and the velocity distribution u (y) to which the air boundary layer 13 is subjected. The viscous shear forces experienced by the air boundary layer 13 are actually the drag forces that the individual disks create against the air boundary layer 13. The axis of abscissa in fig. 8 refers to the distance in the moving direction of the air boundary layer 13, and the axis of ordinate refers to the height of the air boundary layer 13 in the direction perpendicular to the moving direction. ve is the airflow velocity at each point within air boundary layer 13, δ is the thickness of air boundary layer 13, and τ w is the viscous shear force at the surface of annular disk 10. The variable y in τ (y) and u (y) refers to the height of the cross-section of the boundary layer 13 in the direction perpendicular to the direction of movement, and L is the distance between a point on the inner circumference of the annular disk 10 and a point on the surface of the annular disk 10.τ (y) is the distribution of viscous shear forces experienced at this distance L at a cross-sectional height y of the boundary layer 13 of air; u (y) is the velocity profile at this distance L for a cross-section of the air boundary layer 13 having a height y.

Fig. 9 is an air circulation schematic diagram of a laminar flow fan according to an embodiment of the present invention. As shown in fig. 9, the radial centers of the plurality of annular disks 10 collectively form an air intake passage 11 for allowing air outside the laminar flow fan 300 to enter. A plurality of air outlets 12 are formed in gaps between the plurality of annular disks 10 to allow laminar air to be blown out. 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 12 is higher than that of the laminar wind entering the air inlet channel 11.

The distance between two adjacent annular disks 10 can be gradually increased from bottom to top. The inventor finds that, through multiple experiments, as the distance between two adjacent annular disks 10 gradually increases from bottom to top, the air volume of the laminar flow fan 300 can be effectively increased. In some embodiments, the distance between two adjacent annular disks 10 varies by the same amount, that is, the distance between two adjacent annular disks 10 increases from bottom to top by the same value. For example, the distances between two adjacent annular disks 10 in the 8 annular disks 10 may be sequentially set from bottom to top as follows: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm and 19.75mm, and the distance between two adjacent annular disks 10 is increased by 1mm from bottom to top. It should be noted that the specific values of the variation of the spacing between two adjacent annular disks 10 are only examples, and are not limitations of the present invention.

the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 gradually increases from bottom to top, that is, the plurality of annular disks 10 are arranged in parallel at different intervals. The air outlets 12 formed by the gaps among the annular disks 10 can enable the laminar flow fan to uniformly supply air for 360 degrees, various uncomfortable symptoms caused by direct blowing of air supplied by an air conditioner are avoided for a user, and the use experience of the user is further improved. The distance between two adjacent annular disks 10 described above gradually increases from bottom to top, which means that the distance between two adjacent annular disks 10 gradually increases along the direction of the airflow flowing in the air inlet channel 11.

Fig. 10 is a schematic diagram illustrating a relationship between a gradual pitch change of a plurality of annular disks 10 of an annular disk 10 of a laminar flow fan and an air volume and an air pressure according to an embodiment of the present invention. The abscissa axis shading 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 air outlet 12 of the laminar flow fan and the inlet of the air inlet channel 11. 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. 10 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. As shown in fig. 10, when the above mentioned parameters are all kept unchanged, the distance between every two adjacent annular disks 10 in the plurality of 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. As can be seen from fig. 10, 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. In an embodiment, the outer diameter of the ring disk 10 of the laminar flow fan 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, 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. It should be noted that, the distance between two adjacent annular disks 10 in the plurality of annular disks 10 gradually increases from bottom to top, which means that the distance between two adjacent annular disks 10 gradually increases along the direction of the airflow flowing in the air inlet channel 11.

Fig. 11 is a schematic diagram illustrating the relationship between the rotation speed of the motor 20 of the laminar flow fan and the air volume and the air pressure according to an embodiment of the present invention. Wherein the abscissa axis Speed of revolution refers to the rotational Speed of the motor 20, the left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 11 is a schematic diagram illustrating the relationship between the rotation speed of the motor 20 and the air volume and the air pressure when the outer diameter, the inner diameter, the number of layers, the distance, and the thickness of the ring-shaped disk 10 of the laminar flow fan are all kept constant. As shown in fig. 11, when the above mentioned parameters are kept constant, the air volume increases substantially linearly with the increase of the rotation speed of the motor 20, but the increase of the speed tends to be slow, and the increase of the air pressure is not substantially changed. That is, for the same laminar flow fan, the air volume increases approximately linearly as the rotation speed of the motor 20 increases. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan is 175mm, the inner diameter of the annular disk 10 is 115mm, the number of the annular disks 10 is 8, and the distance between two adjacent annular disks 10 is sequentially set from bottom to top: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm, 19.75mm, when the thickness of the annular disc 10 is 2mm, the linear relation between the rotating speed of the motor 20 and the air volume of the laminar flow fan is more obvious.

Since the rotation speed of the motor 20 and the air volume of the laminar flow fan are approximately linear, in a preferred embodiment, the motor 20 may be further configured to: the rotating speed of the motor 20 is determined according to the acquired target air volume of the laminar flow fan. That is, the target air volume of the laminar flow fan may be first obtained, and then the rotation speed of the motor 20 may be determined according to a linear relationship between the target air volume and the rotation speed of the motor 20. The target air volume may be obtained by an input operation of the user.

In some embodiments, as shown in fig. 1 to 3, the ceiling type air conditioning indoor unit further includes a baffle 200. The diaphragm 200 is disposed under the casing 100 with a top surface thereof forming a gap with a bottom surface of the casing 100. One function of the baffle 200 is to guide indoor air from all around the periphery of the baffle 200 to the intake vent 110 through a gap between the baffle 200 and the casing 100. Compare in the direct vertical scheme that upwards gets into casing 100 of messenger's wind from casing 100 bottom, the embodiment of the utility model provides a set up guiding disc 200 for the bottom outward appearance of suspension type indoor set (its bottom is mainly towards the user) is more pleasing to the eye, avoids casing 100 bottom to arrange complicated air inlet grille and influences the outward appearance. Moreover, the air inlet direction is close to the horizontal direction, the air outlet direction is also close to the horizontal direction, and the included angle between the air inlet direction and the air outlet direction is smaller, so that the energy consumption and the noise of the fan are reduced.

As shown in fig. 1 and 3, the baffle 200 may have a tapered guide slope 201 gradually inclined downward from the center thereof to the periphery thereof to guide indoor air. After entering the gap between the diaphragm 200 and the housing 100 from the periphery of the diaphragm 200, the indoor air is guided by the tapered guiding slope 201 to gradually flow obliquely upward to facilitate the indoor air to enter the air inlet 110. It is understood that the generatrix of the tapered guide slope 201 (which is rotated about the rotational axis of the diaphragm 200 to form the tapered guide slope 201) is not necessarily a straight line, but may be an arc line with a center recessed inward compared to the upper and lower ends as shown in fig. 3.

in addition, the casing 100 may be formed with an air inlet duct 140, and an inlet of the air inlet duct 140 forms the air inlet 110. The inner wall of the air inlet duct 140 is a tapered surface that gradually extends from bottom to top to the center in an inclined manner, so as to form a volute-like structure with the tapered guide inclined surface 201 of the deflector 200, thereby enhancing the air inlet guide function and improving the air suction efficiency of the fan.

as shown in fig. 1 and 2, the peripheral contour of the baffle 200 may be circular, and the intake vent 110 may also be circular. Both are circular structures for more smoothly entering air, and the bottom appearance of the indoor unit is more attractive. In addition, the peripheral contour diameter of the diversion disk 200 can be made larger than the diameter of the air inlet 110, so as to increase the diversion length of the diversion disk 200 and ensure the diversion effect. Meanwhile, the baffle 200 can completely shield the air inlet 110, so that the bottom of the indoor unit is more beautiful. As shown in fig. 1, the diaphragm 200 is connected to the housing 100 by a plurality of connecting arms 210.

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 top of the shell is used for being fixed on a roof, the bottom of the shell is provided with an air inlet, and the side of the shell is provided with at least one air supply outlet;

a heat exchanger disposed within the housing;

The laminar flow fan is arranged in the shell and used for promoting indoor air to enter the shell from the air inlet and flow to the air supply outlet after exchanging heat with the heat exchanger, and the laminar flow fan comprises:

The annular disks are arranged in parallel at intervals, fixedly connected and collinear, the axes of the annular disks extend along the vertical direction, each annular disk is composed of an annular inner ring and an outer ring extending outwards from the radial outer edge of the inner ring, and the outer ring and the inner ring are clamped by a preset obtuse angle so that the air outlet direction of the annular disks is matched with the air supply direction of the air supply opening; and

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

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

Each air supply outlet is used for supplying air to the oblique lower part;

The inner ring and the outer ring are both flat-shaped, and the inner ring extends along the horizontal direction; and is

The outer ring loop extends outwardly and gradually downwardly from a radially outer edge of the inner ring loop.

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

The ratio of the outer diameter of the inner ring to the outer diameter of the outer ring is between 0.6 and 0.8.

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

The heat exchanger is in the shape of an arc plate with an axis extending in the vertical direction, and surrounds the laminar flow fan at the radial outer side of the laminar flow fan.

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

The laminar flow fan also comprises a circular disk, and the circular disk is arranged above the annular disk at the uppermost side and is fixedly connected with the annular disk;

The motor is fixed on the shell, and the rotating shaft of the motor is connected with the circular disk to drive the circular disk to rotate.

6. The indoor unit of a ceiling type air conditioner as set forth in claim 5,

The laminar flow fan further comprises a plurality of connecting rods, each connecting rod penetrates through the circular disk and the annular disks to fixedly connect the annular disks to the circular disk.

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

For the plurality of annular disks, the distance between two adjacent annular disks is gradually increased from bottom to top.

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

And the flow guide disc is arranged below the shell and used for guiding indoor air to flow to the air inlet through a gap between the flow guide disc and the shell from all parts of the periphery of the flow guide disc.

9. The indoor unit of a ceiling type air conditioner as set forth in claim 8,

the deflector has a tapered guide slope gradually inclined downward from the center to the periphery thereof to guide the air to gradually flow obliquely upward so as to enter the air inlet.

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

at least one air outlet duct which is matched with the at least one air supply outlet one by one is arranged in the shell;

Each air outlet channel is used for guiding the air flow flowing out of the heat exchanger to the corresponding air supply opening obliquely and downwards.