CN111442377A - Indoor unit of air conditioner - Google Patents

Abstract

The invention provides an indoor unit of an air conditioner, which comprises a shell, a fan and a fan, wherein the shell is limited with an air inlet and at least one air supply outlet; the heat exchanger is arranged in the shell; the main fan is arranged in the shell and 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; and at least one air guide mechanism, every air guide mechanism sets up in an air supply opening department, and it includes one rotationally connects in the mounting bracket of casing and sets up at least one water conservancy diversion fan on the mounting bracket to carry out the pressure boost through opening the air-out of water conservancy diversion fan to the air supply opening, and adjust the air supply direction through rotating the mounting bracket.

Description

Indoor unit of air conditioner

Technical Field

The invention relates to the technical field of air conditioning, in particular to an indoor unit of an air conditioner.

Background

The conventional household air conditioner is usually a cabinet air conditioner or an on-hook air conditioner, and the air supply outlet of the conventional household air conditioner is usually provided with an air guide mechanism such as an air guide plate and a swing blade for adjusting the wind direction.

However, in the air guiding process of the air deflector and the swinging blade, the direction of air flow is forcibly changed, the energy loss is large, and the air supply force is influenced, so that the air supply distance is influenced, and the overall efficiency of the air conditioner is also influenced.

Disclosure of Invention

The invention aims to provide an air conditioner indoor unit, which is used for avoiding energy loss caused by arranging an air deflector and a swinging blade for guiding air, thereby increasing the air supply distance and improving the efficiency of the whole machine.

The invention also aims to make the air inlet of the air-conditioning indoor unit smoother and higher in air inlet quantity and beautify the bottom appearance of the air-conditioning indoor unit.

The invention also aims to make the noise of the air conditioner indoor unit smaller and the air volume higher.

In particular, the present invention provides an indoor unit of an air conditioner, comprising:

a housing defining an air inlet and at least one air delivery outlet;

the heat exchanger is arranged in the shell;

the main fan is arranged in the shell and 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; and

at least one air guide mechanism, every air guide mechanism sets up in an air supply vent department, and it includes that one rotationally connects in the mounting bracket of casing and sets up at least one water conservancy diversion fan on the mounting bracket to carry out the pressure boost through opening the air-out of water conservancy diversion fan to the air supply vent, and adjust the air supply direction through rotating the mounting bracket.

Optionally, each air delivery outlet is elongated; each air guide mechanism comprises a plurality of guide fans which are arranged along the length direction of the air supply outlet; and the mounting bracket can rotate around an axis which extends parallel to the length direction of the air supply outlet.

Optionally, the mounting frame comprises: a square frame; the connecting rods are arranged in the square frame, and each connecting rod is used for mounting a flow guide fan; two coaxial mounting shafts respectively extending out from two ends of the square frame in the length direction and rotatably connected to the shell; the air guide mechanism further comprises a driving motor which is arranged on the shell and used for driving the installation shaft to rotate, so that the installation frame is driven to rotate.

Alternatively, the air guide mechanism covers only a partial region of the corresponding air outlet to allow partial air in the casing to be directly blown out from the remaining region of the air outlet without being pressurized by the air guide mechanism.

Optionally, each inducer fan is an axial fan.

Optionally, the indoor unit of the air conditioner is a ceiling type indoor unit of the air conditioner, the top of the casing is used for being fixed on a roof, the air inlet is located at the bottom of the casing, and the at least one air supply outlet is located at the side of the casing.

Optionally, the indoor unit of the air conditioner further includes a baffle plate disposed below the casing for guiding the indoor air to flow from all around the periphery of the baffle plate to the air inlet through a gap between the baffle plate and the casing.

Optionally, the indoor unit of the air conditioner further includes a booster fan disposed at the air inlet to promote indoor air to flow to the air inlet, so as to increase an air intake rate of the air inlet.

Optionally, the main fan is a laminar flow fan, comprising: a plurality of annular discs which are arranged in parallel at intervals and fixedly connected with each other, and the axes of the annular discs extend along the vertical direction and are collinear; 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 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, for a plurality of annular disks, the distance between two adjacent annular disks gradually increases from bottom to top.

The air-conditioning indoor unit is provided with an air guide mechanism at an air supply opening, and the air guide mechanism comprises a rotatable mounting frame and at least one guide fan. The diversion fan can pressurize the air outlet of the air supply outlet, so that the air is blown out at a higher pressure, and the air supply distance is very large. Moreover, the air outlet of the air supply outlet is quicker and smoother, the air flow in the shell is smoother, the heat exchange efficiency of the heat exchanger and the operation efficiency of the main fan can be improved, and the overall efficiency of the air conditioner is improved. The mounting bracket can drive the diversion fan to rotate, so that the diversion fan blows air towards different directions, and the air supply direction is adjusted. The invention overcomes the problem that the air supply distance is finally influenced because the energy loss is large because the airflow direction is forcibly changed when the air deflector and the swinging blade are adopted for guiding the flow in the prior art.

Furthermore, the indoor unit of the air conditioner can be a ceiling type indoor unit of the air conditioner, the ceiling type indoor unit of the air conditioner is hung on a roof, the air inlet is located at the bottom, and the air outlet is located at the side. Therefore, the plurality of air supply openings can be arranged on the side part and face different directions, and all-around air outlet and 360-degree circumferential all-around air supply can be achieved. And because the installation position of the ceiling type air conditioner indoor unit is higher, the air outlet coverage range is also extremely large.

Furthermore, in the indoor unit of the air conditioner, the guide plate is arranged below the air inlet at the bottom of the shell, so that air flows to the air inlet from a gap between the guide plate and the shell. 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.

Furthermore, the indoor unit of the air conditioner adopts the laminar flow fan, and the distance between two adjacent annular disks is gradually increased from bottom to top, so that the air volume of the laminar flow fan can be effectively increased, and the air outlet of the laminar flow fan meets the use requirements of users. In addition, laminar flow fan realizes the laminar flow air supply through the viscidity effect, reduces traditional fan and can not increase the requirement that the blade can satisfy the amount of wind even to the use of blade, and air supply process small in noise, amount of wind are high, effectively promote user's use and experience.

Furthermore, in the air-conditioning indoor unit, the supercharging fan is arranged at the air inlet, so that the air inlet supercharging of the air inlet can be realized, the air inflow is increased, the air quantity of the indoor unit is increased, the refrigerating capacity/heating capacity is improved, and the efficiency of the whole air-conditioning indoor unit is finally 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 invention will be described in detail hereinafter, by way of illustration and not 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 an air conditioning indoor unit according to an embodiment of the present invention;

fig. 2 is a schematic bottom view of the air conditioning indoor unit shown in fig. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

fig. 4 is a schematic structural view of an air guide mechanism according to an embodiment of the present invention;

fig. 5 is a schematic side view of the air guide mechanism shown in fig. 4;

FIG. 6 is a schematic diagram of the overall structure of a laminar flow fan according to one embodiment of the present invention;

FIG. 7 is a schematic view of the laminar flow fan of FIG. 6 from another perspective;

FIG. 8 is a schematic view of the laminar flow fan of FIG. 7 from another perspective;

FIG. 9 is a schematic diagram of the air supply principle of a laminar flow fan according to an embodiment of the present invention;

FIG. 10 is a velocity profile and force profile of a laminar flow fan according to one embodiment of the present invention;

FIG. 11 is a schematic view of the air circulation of a laminar flow fan according to one embodiment of the present invention;

FIG. 12 is a schematic diagram of 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 according to an embodiment of the present invention;

fig. 13 is a schematic diagram of the relationship between the motor speed and the air volume and the air pressure of the laminar flow fan according to an embodiment of the present invention.

Detailed Description

An 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," and the like are based on the orientations or positional relationships shown in the drawings, the description is for convenience only and to simplify the description, and no indication or suggestion is made that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

The air conditioning indoor unit and the air conditioning outdoor unit (not shown) of the embodiment of the present invention constitute a vapor compression refrigeration cycle system, and realize cooling/heating of an indoor environment.

Fig. 1 is a schematic side view of an air conditioning indoor unit according to an embodiment of the present invention; fig. 2 is a schematic bottom view of the air conditioning indoor unit shown in fig. 1; fig. 3 is a sectional view a-a of fig. 1.

The invention is not limited to the specific form of the indoor unit of the air conditioner, and can be a wall-mounted indoor unit of the air conditioner, a floor type indoor unit of the air conditioner and a ceiling type indoor unit of the air conditioner. Fig. 1 to 3 are views illustrating a ceiling type air conditioner indoor unit, and will explain the present invention.

As shown in fig. 1 to 3, an air conditioning indoor unit according to an embodiment of the present invention may generally include a casing 100, a heat exchanger 400, a main fan 300, and at least one air guide mechanism 500.

The housing 100 defines an intake vent 110 and at least one supply vent 120. The ceiling type indoor unit of the air conditioner is integrally installed under the roof of an indoor room, the top of the casing 100 is fixed to the roof, and the rest of the indoor unit of the air conditioner is exposed under the roof. The roof is illustrated with dashed lines with reference to fig. 1. 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.

Disposed within the housing 100 is a heat exchanger 400, which 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 the heat-exchange air is hot air during heating), and the heat-exchange air is blown back to the indoor space from the air supply outlet 120 to realize indoor cooling/heating. A main fan 300 is disposed in the housing 100 for providing power to the above-described air flow process. The heat exchanger 400 may be disposed between the main fan 300 and the supply outlet 120 and surround the main fan 300, so that the airflow passes through more surfaces of the heat exchanger 400, thereby improving heat exchange efficiency.

Each air guide mechanism 500 is provided at one air blowing port 120. Each air guide mechanism 500 includes a mounting frame 510 and at least one guide fan 520. The mounting bracket 510 is rotatably coupled to the housing 100. The guide fan 520 is mounted on the mounting bracket 510. When the guide fan 520 is turned on, the air outlet of the air supply opening 120 can be pressurized. By rotating the mounting bracket 510, the orientation of the guiding fan 520 can be adjusted, thereby changing the air outlet direction.

In the embodiment of the present invention, the guiding fan 520 can pressurize the outlet air of the air supply opening 120, so that the air is blown out at a higher pressure, and the air distance is very large. Moreover, the air outlet 120 can be used for discharging air more quickly and smoothly, so that the air flow in the casing 100 is smoother, the heat exchange efficiency of the heat exchanger 400 and the operation efficiency of the main fan 300 can be improved, and the overall efficiency of the air conditioner can be improved. The mounting bracket 510 can drive the guiding fan 520 to rotate, so that the guiding fan 520 blows air in different directions, and the air supply direction is adjusted. The invention overcomes the problem that the air supply distance is finally influenced because the energy loss is large because the airflow direction is forcibly changed when the air deflector and the swinging blade are adopted for guiding the flow in the prior art.

Each supply air outlet 120 may be generally elongated. Each air guide mechanism 500 includes a plurality of guide fans 520, and the plurality of guide fans 520 are arranged along the length direction of the air blowing port 120 so as to cover a larger area. The mounting bracket 510 is rotatable about an axis extending parallel to the length of the supply port 120. As shown in fig. 1, the longitudinal direction of the air blowing port 120 is along the left-right direction of the drawing, and 5 guide fans 520 are arranged in a row from left to right. The mounting bracket 510 can rotate around the X-axis to adjust the outlet angle of the air outlet 120. The guiding fan 520 may be an axial fan, the axial direction of which is perpendicular to the X axis, the air inlet end faces the inside of the casing 100, and the air outlet end faces the indoor.

The wind guide mechanism 500 may cover only a partial region of the corresponding air outlet 120, so as to allow partial wind in the casing 100 to be directly blown out from the remaining region of the air outlet 120 without being pressurized by the wind guide mechanism 500. As shown in fig. 1, both lateral sides of the air guide mechanism 500 are spaced from both lateral ends of the air supply opening 120 by a predetermined distance, respectively, to allow air to be directly blown out. In this way, when the air conditioner does not require a large amount of air supply (e.g., a dehumidification mode), the guide fan 520 can be selectively turned off to blow more air directly from both sides of the air guide mechanism 500, and the direction of the air is indicated by two arrows in fig. 1.

Fig. 4 is a schematic structural view of an air guiding mechanism 500 according to an embodiment of the present invention; fig. 5 is a schematic side view of the air guide mechanism 500 shown in fig. 4.

Fig. 4 and 5 show a specific structure of the air guide mechanism 500. The mounting bracket 510 includes a frame 511, a plurality of connecting rods 512, and two mounting shafts 513. The frame 511 is a rectangular frame, and a plurality of connection bars 512 are disposed in the frame 511 and are sequentially arranged along the length direction of the frame 511. Each connecting rod 512 is used for mounting a guide fan 520. Two mounting shafts 513 (coaxially disposed) extend from both ends of the block 511 in the longitudinal direction, respectively, for rotatably coupling to the casing 100, specifically, to both lateral ends of the air blowing port 120. The air guiding mechanism 500 further includes a driving motor 514 mounted to the housing 100 for driving the mounting shaft 513 to rotate, thereby driving the mounting bracket 510 to rotate.

In some embodiments, as shown in fig. 1 to 3, a baffle 200 is further disposed below the casing 100. The top surface of the diaphragm 200 forms a gap with the 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. Compared with the scheme that wind directly enters the casing 100 from the bottom of the casing 100 vertically and upwards, the deflector 200 provided by the embodiment of the invention enables the bottom appearance (the bottom of the ceiling type indoor unit mainly faces to users) of the ceiling type indoor unit to be more attractive, and avoids the influence on the appearance caused by the arrangement of a complex air inlet grille on the bottom of the casing 100. 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 will be understood that the generatrix of the tapered lead-in ramp 201 need not be a straight line, but may be a concave arc as shown in FIG. 3 at the middle as compared to the ends.

As shown in fig. 1 and 3, the circumferential 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.

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.

In some embodiments, as shown in fig. 1 to 3, the indoor unit of an air conditioner further includes a booster fan 600. The booster fan 600 is disposed at the air inlet 110, and is configured to promote indoor air to flow to the air inlet 110, so as to increase an air volume of the air conditioner indoor unit, increase an operation efficiency of the main fan 300, increase a cooling capacity/a heating capacity, and finally increase a whole efficiency of the air conditioner. The booster fan 600 may be disposed inside the casing 100, such that the air inlet 110 is located below the booster fan 600, thereby preventing the air conditioner indoor unit from being affected by the air inlet, and the air conditioner indoor unit is closer to the main fan 300, thereby improving the boosting effect. The booster fan 600 may be a ducted fan having an axis extending in a vertical direction. The ducted fan includes a cylindrical duct 610. When the ducted fan is operating, its blades rotate, while the ducted 610 does not rotate. The ducted fan has a better wind guiding directivity, and is advantageous in that indoor air more directly and smoothly vertically enters the inside of the casing 100, thereby more facilitating the improvement of the operation efficiency of the main fan 300. In some alternative embodiments, the booster fan is also an axial fan with an axis extending in the vertical direction, and the specific installation manner is not described in detail.

The main fan 300 may be a centrifugal fan or a laminar flow fan. However, the centrifugal fan generally requires several tens of large-sized blades to increase wind pressure and wind volume, and the blades rotate to rub or impact air when the centrifugal fan is operated. The centrifugal fan has wide blades and a large thickness, and thus generates very large noise when the motor is operated at high speed.

Therefore, the main fan 300 is preferably a laminar flow fan, so that the use of the traditional fan on the blades is reduced, even the requirement of the air volume can be met without increasing the blades, the noise in the air supply process is low, the air volume is high, and the use experience of a user is effectively improved.

FIG. 6 is a schematic diagram of the overall structure of a laminar flow fan according to one embodiment of the present invention; FIG. 7 is a schematic view of the laminar flow fan of FIG. 6 from another perspective; fig. 8 is a schematic view of the laminar flow fan shown in fig. 7 from another perspective.

As shown in fig. 6 to 8, the laminar flow fan of the present embodiment may generally include a plurality of annular disks 10 and a motor 20. Wherein, a plurality of annular discs 10, its 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 is low in noise and high in air quantity, and the use experience of a user is effectively improved.

Further, the distance between two adjacent annular disks 10 can be gradually increased from bottom to top. The inventor finds that the air volume of the laminar flow fan can be effectively improved as the distance between two adjacent annular disks 10 is gradually increased from bottom to top through a plurality of experiments. 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 limiting to the present invention.

Considering that the thickness of the laminar flow fan 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 constrained. In addition, the volume occupied by the laminar flow fan 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.

The laminar flow fan may also include a single circular disk 30 and a connecting rod 40. The circular disks 30 may be disposed above the plurality of annular disks 10 in parallel at intervals, and the motor 20 is disposed below the circular disks 30 and fixed to the housing 100. Tie rods 40 may extend through circular disk 30 and plurality of annular disks 10 to connect plurality of annular disks 10 to circular disk 30. The motor 20 is also configured to directly drive the circular disk 30 to rotate, and thus the circular disk 30 rotates the plurality of annular disks 10. That is, the motor 20 configured to rotate the plurality of annular discs 10 is dependent on the motor 20 first rotating the circular discs 30 and then rotating the plurality of annular discs 10 by the circular discs 30. In a specific embodiment, the radius of the circular disk 30 is the same as the outer diameter of the plurality of annular disks 10, and may be set to be 170mm to 180mm, so as to restrict the occupied volume in the lateral direction of the laminar flow fan.

In some embodiments, the connecting rods 40 are multiple and are uniformly spaced throughout the edges of the circular disks 30 and the plurality of annular disks 10. The connecting rods 40 uniformly penetrate through the edges of the circular disk 30 and the annular disks 10 at intervals, so that the connection relationship between the circular disk 30 and the annular disks 10 is stable, and further, 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 working reliability of the laminar flow fan is improved.

FIG. 9 is a schematic diagram of the air supply principle of a laminar flow fan according to an embodiment of the present invention; FIG. 10 is a velocity profile and force profile of a laminar flow fan according to one embodiment of the present invention.

As shown in fig. 9 and 10, 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 drives the plurality of annular disks 10 to rotate at a high speed, and the air in the intervals of the annular disks contacts and moves with each other, so that the air boundary layer 13 near the surfaces of the annular disks is driven by the rotating annular disks to rotate from inside to outside under the action of the viscous shear force τ to form laminar flow wind.

FIG. 10 is a graph showing the distribution τ (y) of the viscous shear force and the distribution u (y) of the velocity to which the boundary layer 13 of air 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. 10 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. v. of_eThe velocity of the air flow at each point in the air boundary layer 13, the thickness of the air boundary layer 13, τ_wThe variables y in τ (y) and u (y) refer to the height of the cross-section of boundary layer 13 in the direction perpendicular to the direction of travel, L is the distance between a point on the inner circumference of annular disk 10 and a point on the surface of annular disk 10, then τ (y) is the distribution of viscous shear forces experienced at the height y of the cross-section of boundary layer 13 at this distance L, and u (y) is the velocity distribution at the height y of the cross-section of boundary layer 13 at this distance L.

FIG. 11 is a schematic view of the air circulation of a laminar flow fan according to one embodiment of the present invention.

As shown in fig. 6 to 8 and 11, an air inlet channel 11 is formed at the center of the plurality of annular disks 10 to allow air outside the laminar flow fan 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. In the plurality of annular disks 10 of the present embodiment, the distance between every two adjacent 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.

The plurality of annular disks 10 may each be planar disks and in a preferred embodiment, the lower surface of the circular disk 30 has an inverted conical protrusion 31 to direct the air flow entering the laminar flow fan and assist in forming laminar air flow. The upper surface of circular disk 30 may be a plane, and circular disk 30 mainly functions to fixedly receive motor 20 and is connected to a plurality of annular disks 10 through connecting rod 40, so as to drive a plurality of annular disks 10 to rotate when motor 20 drives circular disk 30 to rotate. The inverted cone-shaped protrusion 31 on the lower surface of the circular disk 30 can effectively guide the air entering the laminar flow fan through the air inlet channel to enter the gap between the annular disks, thereby improving the efficiency of forming laminar flow air.

Fig. 12 is a schematic diagram illustrating a relationship between a gradual change in the pitch 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 disc 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. 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. As shown in fig. 12, when all the above mentioned parameters are 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. 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. 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. 13 is a schematic diagram of 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 Speed of revolution of the abscissa axis refers to the rotational Speed of the motor 20, the Mass flow rate of the left ordinate axis refers to the air volume, and the Pressure of the right ordinate axis refers to the air Pressure. Specifically, fig. 13 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. 13, 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 rate tends to be slow, and the increase of the air pressure is substantially unchanged. 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.

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

Claims (10)

1. An air conditioning indoor unit, characterized by comprising:

a housing defining an air inlet and at least one air delivery outlet;

a heat exchanger disposed within the housing;

the main fan is arranged in the shell and 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; and

at least one wind guiding mechanism, every wind guiding mechanism sets up one air supply opening department, it includes one rotationally connect in the mounting bracket of casing and setting are in at least one water conservancy diversion fan on the mounting bracket, so that through opening the water conservancy diversion fan is right the air-out of air supply opening carries out the pressure boost, and through rotating the air supply direction is adjusted to the mounting bracket.

2. An indoor unit of an air conditioner according to claim 1,

each air supply outlet is in a long strip shape;

each air guide mechanism comprises a plurality of guide fans which are arranged along the length direction of the air supply outlet; and is

The mounting bracket is rotatable about an axis extending parallel to the length of the supply air outlet.

3. An indoor unit of an air conditioner according to claim 2, wherein the mounting frame includes:

a square frame;

a plurality of connecting rods arranged in the square frame, wherein each connecting rod is used for installing one guide fan;

two coaxial mounting shafts respectively extending out from two ends of the square frame in the length direction and rotatably connected to the shell; and is

The air guide mechanism further comprises a driving motor which is arranged on the shell and used for driving the installation shaft to rotate, so that the installation shaft is driven to rotate.

4. An indoor unit of an air conditioner according to claim 1,

the air guide mechanism covers only a partial area of the corresponding air supply outlet to allow partial air in the casing to be directly blown out from the rest area of the air supply outlet without being pressurized by the air guide mechanism.

5. An indoor unit of an air conditioner according to claim 1,

each guide fan is an axial flow fan.

6. An indoor unit of an air conditioner according to claim 1,

the indoor unit of the air conditioner is a ceiling type indoor unit of the air conditioner, the top of the shell is used for being fixed on a roof,

the air inlet is positioned at the bottom of the shell, and the at least one air supply outlet is positioned at the side part of the shell.

7. An indoor unit of an air conditioner according to claim 6, 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.

8. An indoor unit of an air conditioner according to claim 6, further comprising:

and the booster fan is arranged at the air inlet and used for promoting indoor air to flow to the air inlet so as to improve the air inlet amount of the air inlet.

9. An indoor unit of an air conditioner according to claim 6,

the main fan is a laminar flow fan, which includes:

a plurality of annular discs which are arranged in parallel at intervals and fixedly connected with each other, and the axes of the annular discs extend along the vertical direction and are collinear; 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 plurality of annular discs is driven by the plurality of annular discs to rotate and move from inside to outside due to a viscous effect to form laminar wind.

10. An indoor unit of an air conditioner according to claim 9,

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

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