Ceiling air conditioner indoor unit

Abstract

The present invention provides a ceiling-mounted air-conditioning indoor unit, which comprises a shell having at least one air inlet and at least one air outlet, wherein the air outlet is located at a side of the shell; a heat exchanger arranged in the shell; a fan arranged in the shell and used to inhale indoor air through the air inlet, form heat exchange wind after heat exchange with the heat exchanger, and blow the heat exchange wind back into the room through the air outlet; and an air duct component arranged in the shell and provided with at least one air duct corresponding to at least one air outlet one by one, so as to guide the heat exchange wind to each air outlet; and each air duct is provided with a plurality of guide plates arranged in an up-down direction so as to divide the internal space of the air duct into upper and lower parts.

Description

Technical Field

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

[0002] Most of the existing household air-conditioning indoor units are wall-mounted and floor-standing. Although merchants have made many improvements to the structure of air-conditioning indoor units, it is difficult for the products to undergo fundamental changes and cannot meet the diverse needs of users.

[0003] In addition, the existing indoor units of air conditioners basically use cross-flow fans, and the air outlet direction is straight ahead. Although there are air guide plates to guide the air left and right, and swing blades to guide the air up and down, due to the limitation of the volute structure, the left and right air supply angle is usually less than 80°, and the up and down air supply angle is usually less than 100°. It can be seen that the existing indoor units have fewer air supply directions and a very limited air supply range.

[0004] In addition, the current cross-flow fan mainly has forward blades, which periodically impact the passing airflow, generating obvious rotation noise. The volute cooperates with the fan to achieve the air supply effect, and the front and rear volute tongues also impact the airflow, generating strong turbulent noise. It is difficult to significantly improve the noise quality under the existing technology. Summary of the invention

[0005] The object of the present invention is to solve at least one of the above-mentioned defects of the prior art and to provide a ceiling-mounted air-conditioning indoor unit to meet the diverse needs of users for air-conditioning indoor units.

[0006] Another object of the present invention is to stabilize and pressurize the air flow of the ceiling-mounted air conditioner indoor unit to reduce eddy current losses, so as to make the air flow smoother, reduce wind resistance, and increase the air supply distance.

[0007] A further object of the present invention is to reduce air supply noise and improve noise quality.

[0008] In particular, the present invention provides a ceiling-mounted air conditioner indoor unit, comprising:

[0009] A shell having at least one air inlet and at least one air outlet, wherein the air outlet is located on a side of the shell;

[0010] A heat exchanger is disposed in the shell;

[0011] A fan is disposed in the housing and is used to suck indoor air through the air inlet, exchange heat with the heat exchanger to form heat exchange wind, and blow the heat exchange wind back to the room through the air outlet; and

[0012] An air duct component is disposed in the housing and is provided with at least one air duct corresponding to at least one air outlet, and is used to guide heat exchange wind to each air outlet; and

[0013] A guide plate or a plurality of guide plates arranged in the up-down direction is arranged in each air duct to separate the internal space of the air duct into upper and lower parts.

[0014] Optionally, the air duct is divided into an inlet section and an outlet section along the flow direction of the heat exchange air, and the flow cross-section in the inlet section gradually decreases along the flow direction of the heat exchange air, while the flow cross-section in the outlet section remains unchanged along the flow direction of the heat exchange air.

[0015] Optionally, there are two guide plates; and air flow channels that taper along the flow direction of the heat exchange wind are respectively defined between the upper guide plate and the top wall of the air duct, between the two guide plates, and between the lower guide plate and the bottom wall of the air duct.

[0016] Optionally, from the entrance to the exit of the air duct, the top wall of the air duct is composed of a plurality of tangentially connected sections, each section extending toward the exit of the air duct while gradually sloping downward, and the plurality of sections include: a first arc segment, the center of which is located on the inner side of the air duct; a second arc segment, the center of which is located on the inner side of the air duct and has a diameter larger than the first arc segment; a first straight line segment; a third arc segment, the center of which is located on the outer side of the air duct; and a second straight line segment.

[0017] Optionally, from the entrance to the exit of the air duct, the bottom wall of the air duct includes a plurality of tangentially connected sections in sequence, namely: a third straight line segment, extending horizontally from the entrance to the exit of the air duct; a fourth arc segment, with its center located on the inner side of the air duct, and gradually extending upward from the end of the third straight line segment; a fourth straight line segment, extending upward from the top of the fourth arc segment; a fifth arc segment, with its center located on the outer side of the air duct, and extending upward from the top of the fourth straight line segment; a sixth arc segment, with its center located on the outer side of the air duct and with a smaller diameter than the fifth arc segment, and extending upward from the top of the fifth arc segment; a seventh arc segment, with its center located on the outer side of the air duct and with a smaller diameter than the sixth arc segment, and extending first upward from the top of the sixth arc segment and then toward the exit of the air duct; and a fifth straight line segment, extending from the end of the seventh arc segment toward the exit of the air duct and gradually tilting downward.

[0018] Optionally, the guide plate on the upper side is opposite to the third arc segment of the top wall of the air duct, and is curved in a shape that gradually tilts downward while extending toward the outlet of the air duct with the convex surface facing downward; and the guide plate on the lower side is opposite to the seventh arc segment of the bottom wall of the air duct, and is curved in a shape that gradually tilts downward while extending toward the outlet of the air duct with the convex surface facing upward.

[0019] Optionally, the angle between the tangent of the end of the guide plate on the upper side away from the air duct outlet and the horizontal plane is between 30 and 60°, and the angle between the tangent of the end close to the air duct outlet and the horizontal plane is less than or equal to 20°; and the angle between the tangent of the end of the guide plate on the lower side away from the air duct outlet and the horizontal plane is 0°, and the angle between the tangent of the end close to the air duct outlet and the horizontal plane is less than or equal to 20°.

[0020] Optionally, there is one air inlet, which is arranged on the bottom surface of the shell; and the fan is a laminar fan, whose rotation axis extends vertically. When running, it sucks air from its axial bottom, uses the viscosity effect of the air to generate laminar wind and blows it out radially.

[0021] Optionally, the heat exchanger is in the shape of an annular plate or a semi-annular plate with an axis extending in the vertical direction, and is arranged around the laminar flow fan on the radial outside of the laminar flow fan.

[0022] Optionally, the air duct component is in the shape of a cover with an open bottom, and an air duct is formed on its side; the air duct component is buckled on the bottom of the shell so as to cover the heat exchanger and the fan therein.

[0023] The ceiling-mounted air conditioner indoor unit of the present invention is hoisted on the roof, and the entire shell side is exposed to the outside, so that multiple air outlets can be arranged on the side, thereby realizing multi-directional air supply such as two-side, three-side, four-side air outlet and even 360° circumferential air supply, and the air supply range is extremely large.

[0024] Furthermore, the ceiling-mounted air conditioner indoor unit of the present invention uses an air duct to straighten the air flow before discharging it to the air outlet, thereby reducing the vortex flow generated at the air outlet, reducing the vortex flow noise, and reducing the total noise value. In addition, the setting of the air duct also makes the air outlet smoother, reduces power consumption, increases the air volume, and improves the efficiency of the air supply system of the air conditioner. In addition, multiple guide plates can refine and divide the internal space of the air duct into multiple air flow channels, which can enhance the guiding effect of the air flow, reduce wind resistance, and even the air flow. The air outlet is mixed natural wind, which brings a good user experience.

[0025] Furthermore, in the ceiling-mounted air conditioner indoor unit of the present invention, the design of the flow cross section at the air duct entrance can effectively increase the wind speed and improve the air supply distance. After the airflow increases through the gradual reduction of the entrance section, it enters the outlet section with a constant flow cross section for steady flow, which can further adjust the airflow direction and make the airflow more stable and smooth.

[0026] Furthermore, the ceiling-mounted air conditioner indoor unit of the present invention adopts a laminar flow fan, which is based on the laminar flow principle to achieve annular air outlet without dead angles, and is convenient for realizing multi-directional air supply of the indoor unit. In addition, the laminar flow fan uses the viscosity of the air boundary layer to do work, and the annular disc is basically parallel to the flow direction of the airflow, which will not strongly disturb the impact airflow and produce violent vortices, so that its noise is greatly reduced and the noise quality is excellent, which improves the user experience.

[0027] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0029] Figure 1 is a structural schematic diagram of a ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A schematic exploded view of the indoor unit of the ceiling mounted air conditioner shown;

[0031] Figure 3 Cut along a vertical plane Figure 1 A cross-sectional view of an indoor unit of a ceiling-mounted air conditioner shown;

[0032] Figure 4 yes Figure 3 Schematic diagram of the top and bottom wall profiles of the air duct;

[0033] Figure 5 yes Figure 3 Schematic diagram of the profiles of the two guide plates;

[0034] Figure 6 yes Figure 2 A schematic enlarged view of the fixing frame in FIG.

[0035] Figure 7 is a bottom view schematic diagram of a laminar flow fan;

[0036] Figure 8 This is a schematic diagram of the air supply principle of a laminar flow fan;

[0037] Fig. 9 yes Figure 1 A schematic diagram of air circulation of a laminar flow fan of the illustrated embodiment;

[0038] Fig.10 is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention;

[0039] Fig.11 is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention;

[0040] Fig.12 yes Fig.11 Schematic diagram of the relationship between the gradual change in the spacing between multiple annular disks of the laminar fan and the air volume and air pressure. DETAILED DESCRIPTION

[0041] Refer to the following Figures 1 to 12The ceiling-mounted air conditioner indoor unit of the embodiment of the present invention is described. The directions or positional relationships indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0042] The ceiling-mounted air conditioner indoor unit and the air conditioner outdoor unit (not shown) of the embodiment of the present invention together form a vapor compression refrigeration cycle system to achieve cooling / heating of the indoor environment.

[0043] Figure 1 is a structural schematic diagram of a ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic exploded view of the indoor unit of the ceiling mounted air conditioner shown; Figure 3 Cut along a vertical plane Figure 1 A cross-sectional view of the indoor unit of a ceiling-mounted air conditioner is shown.

[0044] like Figures 1 to 3 As shown, the ceiling-mounted air conditioner indoor unit may generally include a housing 100 , a heat exchanger 400 , a fan 300 , an air duct component 180 , and a plurality of guide plates 910 , 920 .

[0045] The indoor unit of the ceiling-mounted air conditioner is suspended as a whole below the indoor roof, and the top of the housing 100 is used to connect to the roof. The housing 100 is provided with at least one air inlet 110 and at least one air outlet 120. The air outlet 120 is located on the side of the housing 100. The air inlet 110 can be as shown in FIG. Figures 1 to 3 It is located on the bottom surface of the housing 100 , and may also be located on the side surface of the housing 100 .

[0046] The number of air outlets 120 can be set as needed. For example, if the indoor unit is installed on the roof near the side wall, only one air outlet can be set. If the indoor unit is installed far away from the side wall, such as in the center of the roof, two, three, four or other air outlets with different directions can be set to achieve multi-directional air supply effects such as two-sided air outlet, three-sided air outlet, and four-sided air outlet. Even, the shell can be made circular, and air outlets are provided at all angles of the circumference for air outlet, so as to achieve 360° all-round air supply.

[0047] The heat exchanger 400 is disposed in the housing 100 and may be an evaporator of a vapor compression refrigeration cycle.

[0048] The fan 300 is arranged in the shell 100, and is used to suck indoor air through the air inlet 110, so that it forms heat exchange wind after heat exchange with the heat exchanger 400 (when cooling, the heat exchange wind is cold air, and when heating, the heat exchange wind is hot air), and blow the heat exchange wind back to the room through the air outlet 120 to achieve cooling / heating of the room.

[0049] The air duct component 180 is disposed in the housing 100 and includes at least one air duct 182. The number of air ducts 182 is the same as the number of air outlets 120 and corresponds one to one. The function of the air duct 182 is to guide the heat exchange wind to the corresponding air outlet 120. A guide plate or a plurality of guide plates arranged in the up-down direction are disposed in each air duct 182 to separate the internal space of the air duct 182 up and down. Each guide plate extends in a horizontal direction, specifically in parallel to the length direction of the air outlet.

[0050] The air duct 182 straightens the outlet airflow before discharging it to the air outlet 120, reducing the vortex flow generated at the air outlet 120, reducing the vortex flow noise, and reducing the total noise value. After the diversion, the outlet airflow is smoother, reducing power consumption, increasing air volume, and improving the efficiency of the air supply system. The guide plate divides the internal space of the air duct into multiple airflow channels, which can enhance the guiding effect of the airflow (especially the airflow in the middle of the air duct away from the wall of the air duct) to reduce wind resistance, even airflow, and the air output is mixed natural wind, bringing a good user experience.

[0051] In some embodiments, Figure 3 , the air duct 182 is divided into an inlet section and an outlet section along the flow direction of the airflow, and the flow cross-section of the inlet section gradually shrinks along the flow direction of the heat exchange wind. That is, when the airflow just enters the air duct 182 and flows outward, the air duct 182 becomes narrower and narrower. The flow cross-section of the air duct 182 in its outlet section remains unchanged along the flow direction of the heat exchange wind. That is, before the airflow is about to flow out of the air duct 182, the width of the air duct 182 remains unchanged. The tapered design of the flow cross-section of the inlet section of the air duct 182 can effectively increase the wind speed and improve the air supply distance. After the airflow increases through the tapered cross-section of the inlet section, it enters the outlet section with a constant cross-section for steady flow, which can further adjust the airflow direction and make the airflow more stable and smooth.

[0052] like Figure 3 As shown, the number of guide plates can be two, namely, the upper guide plate 910 and the lower guide plate 920. This can effectively guide the airflow while avoiding too much obstruction to the airflow caused by setting too many guide plates.

[0053] An airflow channel that tapers along the flow direction of the heat exchange wind is defined between the upper airflow guide plate 910 of the two airflow guide plates 910 and 920 and the top wall of the air duct 182. An airflow channel that tapers along the flow direction of the heat exchange wind is defined between the two airflow guide plates 910 and 920. An airflow channel that tapers along the flow direction of the heat exchange wind is defined between the lower airflow guide plate 920 and the bottom wall of the air duct 182. This can enhance the aforementioned airflow guiding effect of increasing the wind speed, so that the airflow away from the top wall / bottom wall of the air duct can also be accelerated.

[0054] Figure 4 yes Figure 3 Schematic diagram of the top and bottom wall profiles of the air duct in FIG. The top and bottom walls of the air duct 182 are refined so that their profiles can better meet the original design intention, that is, to obtain better drainage, flow stabilization and vortex prevention effects.

[0055] The two walls of the air duct 182 in the width direction are vertically symmetrical with respect to the center of the width direction. Figure 2 Therefore, in this embodiment, the change in the area of ​​the flow cross section of the air duct is achieved by changing the profiles of the top wall and the bottom wall of the air duct.

[0056] like Figure 4 The section where the two points BR are located is the inlet section of the air duct 182, and the section where the two points GJ are located is the outlet section of the air duct 182. The space area surrounded by BRKF is the inlet section of the air duct 182, and the space area surrounded by FKJG is the outlet section of the air duct 182.

[0057] From the entrance to the exit of the air duct 182 (the direction r indicated by the arrow), the top wall of the air duct 182 is composed of a plurality of tangentially connected sections in sequence. Moreover, each section extends in the direction toward the exit of the air duct 182 and gradually tilts downward at the same time. The plurality of sections include: a first arc segment BC, a second arc segment CD, a first straight line segment DE, a third arc segment EF, and a second straight line segment FG. Among them, the centers of the first arc segment BC and the second arc segment CD are both located on the inner side of the air duct 182, and the diameter of the second arc segment CD is greater than the diameter of the first arc segment BC. The dotted circle C1 in the figure is the circle where the first arc segment BC is located. The circle C2 is the circle where the second arc segment CD is located. The center of the third arc segment EF is located on the outer side of the air duct 182.

[0058] The profile of the top wall of the air duct is set in such a way that the airflow near the top wall first slowly enters the BC section, and after the transition of the CD section, the cross-section is rapidly contracted in the DE section to accelerate, and then turns through the EF section and transitions to the smooth FG section to achieve steady flow blowing.

[0059] From the entrance to the exit of the air duct 182, the bottom wall of the air duct 182 includes a plurality of tangentially connected segments, namely, a third straight line segment RQ, a fourth arc segment QP, a fourth straight line segment PN, a fifth arc segment NM, a sixth arc segment ML, a seventh arc segment LK and a fifth straight line segment KJ. Among them, the third straight line segment RQ extends horizontally from the entrance to the exit of the air duct. The center of the fourth arc segment QP is located on the inner side of the air duct 182, and gradually extends upward from the end of the third straight line segment RQ. The fourth straight line segment PN extends upward from the top of the fourth arc segment QP. The center of the fifth arc segment NM is located on the outer side of the air duct 182, and extends upward from the top of the fourth straight line segment PN. The center of the sixth arc segment ML is located on the outer side of the air duct 182 and has a smaller diameter than the fifth arc segment NM, and extends upward from the top of the fifth arc segment NM. The center of the seventh arc segment LK is located outside the air duct 182 and has a smaller diameter than the sixth arc segment ML. It extends upward from the top of the sixth arc segment ML and then toward the outlet of the air duct 182. The fifth straight line segment KJ extends from the end of the seventh arc segment LK toward the outlet of the air duct 182 and gradually tilts downward. LK may be parallel to FG. The dotted circle C6 is the circle where the fifth arc segment NM is located, and the dotted circle C5 is the circle where the sixth arc segment ML is located. The dotted circle C4 is the circle where the seventh arc segment LK is located.

[0060] The contour of the bottom wall of the air duct is set in such a way that the airflow near the bottom wall first slowly enters the RQ section, and after a smooth transition through the QP section, enters the PN, NM, and ML sections, where the cross-sections are rapidly contracted to accelerate, and then turns through the LK section and transitions to the smooth KJ section to achieve steady flow blowing.

[0061] Figure 5 yes Figure 3 Schematic diagram of the two guide plates in the figure. Figure 4 and Figure 5 As shown, the guide plate 910 on the upper side is opposite to the third arc segment EF of the top wall of the air duct 182, and is in a curved shape extending toward the outlet of the air duct 182 while gradually tilting downward with the convex surface facing downward, and specifically can be in an arc shape with the center located above the guide plate 910. In this way, the guide plate 910 and the top wall of the air duct 182 are matched in shape, so that they form a gradually shrinking airflow channel with the top wall of the air duct 182.

[0062] The guide plate 920 at the lower side is opposite to the seventh arc segment LK of the bottom wall of the air duct 182, and is in a curved shape extending toward the outlet of the air duct 182 while gradually tilting downward with the convex surface facing upward, and specifically may be in an arc shape with the center located below the guide plate 920. In this way, the guide plate 920 and the bottom wall of the air duct 182 are matched in shape, so that they form a gradually contracting air flow channel with the bottom wall of the air duct 182.

[0063] The profiles of the two guide plates can be refined as follows to make them more compatible with the top / bottom walls of the air duct and enhance the guide effect. Figure 5 .

[0064] The angle a between the tangent line m of the upper guide plate 910 away from the air duct outlet and the horizontal plane x1 is between 30° and 60°, such as 30°, 40°, 50°, 60°, etc., preferably 45°. The angle b between the tangent line n of the end close to the air duct outlet and the horizontal plane is less than or equal to 20°, such as 0°, 10°, 20°, etc., preferably 0°.

[0065] The angle between the tangent of the end of the guide plate 920 on the lower side away from the air duct outlet and the horizontal plane x3 is 0°, and the angle c between the tangent p of the end close to the air duct outlet and the horizontal plane is less than 20°, such as 0°, 10°, 20°, etc., preferably 0°.

[0066] like Figure 2 The air duct component 180 may be in the shape of a cover with an open bottom, and the side thereof is formed with the aforementioned air duct 182. The air duct component 180 is buckled on the bottom of the housing 100 so as to cover the heat exchanger 400 and the fan 300 therein, so that the heat exchange wind can only flow to the air outlet 120 through the air duct 182 so as to be blown out more smoothly.

[0067] like Figure 1 and Figure 3 As shown, at least one wind deflector 600 for guiding the wind direction is provided at each air outlet 120. The wind deflector 600 is in the shape of a strip with its length direction parallel to the horizontal direction, and its rotation axis is parallel to its length direction. When multiple wind deflectors 600 are provided, the multiple wind deflectors 600 are arranged from top to bottom.

[0068] The air guide plate 600 can be rotated to open or close the air outlet 120, and the air outlet direction of the air outlet 120 can be changed by rotating the air guide plate 600 to different angles. The air guide plate 600 can be driven to rotate by a motor or other structures, and the details are not repeated here.

[0069] The number of air inlet 110 is one, and it is arranged on the bottom surface of the housing 100. An optional structure of the housing 100 is as follows: Figure 2 , which includes a square bottom shell 150 with an open upper side and a square top cover 130 with an open lower side, which are buckled together to define a storage space. The side of the bottom shell 150 is provided with the aforementioned air outlet 120. The number of the air outlet 120 can be three, and among the four sides of the bottom shell 150, three sides are provided with an air outlet 120. The bottom surface of the bottom shell 150 is provided with an air inlet 110.

[0070] The fan 300 may be a laminar flow fan, whose rotation axis extends vertically and whose bottom is opposite to the air inlet 110 , so that air is sucked in from its axial bottom during operation, and then laminar wind is generated by the viscosity effect of the air and blown out radially to enter the air duct 182 .

[0071] The heat exchanger 400 is preferably an annular plate or a semi-annular plate (circular ring, semi-circular ring, square ring, irregular ring or Figure 2 The heat exchanger 400 surrounds the laminar flow fan, and the laminar flow fan can be any U-shaped ring as shown. The heat exchanger 400 is arranged around the laminar flow fan on the radial outer side of the laminar flow fan, so that it does not need to be arranged above or below the laminar flow fan, which can save the internal space of the ceiling-mounted air conditioner indoor unit, make its structure more compact, and make the whole unit smaller. In addition, the heat exchanger 400 surrounds the laminar flow fan, so that the airflow of the laminar flow fan can pass through the surface of the heat exchanger 400 more quickly and comprehensively, so that the heat exchange amount and heat exchange efficiency of the heat exchanger 400 are greatly improved.

[0072] Figure 7 is a bottom view schematic diagram of a laminar flow fan. Figure 2 , Figure 3 and Figure 7 As shown, the laminar fan includes a plurality of annular discs 10, a motor 20 and a circular disc 30. The plurality of annular discs 10 are arranged in parallel and spaced apart and fixedly connected to each other, and the axes are all extended vertically and in a collinear manner. The circular disc 30 is located at the top of the laminar fan, and is arranged in parallel and spaced apart and indirectly fixedly connected to the uppermost annular disc 10. A plurality of connecting rods 40 extending vertically can be provided, one end of the connecting rod 40 is fixed to the circular disc 30, and then extends vertically to penetrate the plurality of annular discs 10, and is fixed to each annular disc 10, so as to realize the mutual fixation of the plurality of annular discs 10 and the circular disc 30. The center of the circular disc 30 is recessed downward to form an accommodating chamber 31. The motor 20 is directly or indirectly fixed to the housing 100, and extends into the accommodating chamber 31, and is used to drive the plurality of annular discs 10 to rotate, so that the air boundary layer on the surface of the plurality of annular discs 10 is driven by the plurality of annular discs 10 to rotate radially from the inside to the outside due to the viscosity effect to form a laminar wind.

[0073] The laminar flow fan has an axial air intake and radial air outlet structure. It inhales air axially and discharges air radially so as to blow the air horizontally to each air outlet 120. The laminar flow fan is based on the laminar flow principle to achieve annular air outlet without dead angles. In addition, the laminar flow fan uses the viscosity of the air boundary layer to do work. The annular disc 10 is basically parallel to the flow direction of the airflow, and will not strongly disturb the impact airflow to produce violent vortices, so that its noise is greatly reduced and the noise quality is excellent, which significantly improves the user experience. The more specific principle and structure of the laminar flow fan will be introduced in detail later.

[0074] like Figure 2As shown, a support plate 800 is fixedly installed in the housing 100. The support plate 800 is installed on the bottom side of the housing 100. The heat exchanger 400 is installed on the support plate 800 to be supported. The periphery of the support plate 800 is sealed with the inner wall of the housing 100, and a vent 801 opposite to the air inlet 110 is opened in the center to allow the air flow to flow to the bottom of the laminar flow fan through the vent 801. Figure 3 After the incoming air flows through the vent 801, it is all sucked into the laminar flow fan, and does not flow directly to the heat exchanger 400 without the action of the laminar flow fan, thereby affecting the heat exchange efficiency.

[0075] Figure 6 yes Figure 2 Schematic enlargement of the bracket in FIG. Figure 2 , Figure 3 and Figure 6 As shown, the ceiling-mounted air conditioner indoor unit includes a bracket 50. The bracket 50 includes a horizontally arranged support ring 51 and a plurality of connecting arms 52 (at least two, for example Figure 6 The support ring 51 is a hollow ring. The connecting arm 52 extends upward from the edge of the support ring 51, and its upper end is detachably connected to the air duct component 180, specifically, it can be connected by threading. The motor 20 is placed on the upper side of the support ring 51 to be supported by it, and the rotating shaft 21 of the motor 20 extends downward from the center of the support ring 51. In this way, the support ring 51 supports the motor 20 and bears the weight of the entire laminar flow fan.

[0076] like Figures 1 to 3 As shown, the air inlet 110 is circular, and its central axis is the X axis. The bottom wall of the housing 100 around the air inlet 110 is a flow guide surface 140 extending radially outward from the edge of the air inlet 110 and gradually extending downward in an inclined manner. The flow guide surface 140 is a revolving surface coaxial with the air inlet 110. When a plane curve (single curvature, the plane of the curve is not perpendicular to the revolving axis) or a space curve (double curvature) revolves around a fixed straight line (revolving axis), a revolving surface is formed in space.

[0077] The guide member 200 is arranged at the air inlet 110, and its outer peripheral surface 201 is a rotating surface that gradually expands radially outward from top to bottom and is coaxial with the air inlet 110, for guiding indoor air to flow toward the air inlet 110 through the gap between the outer peripheral surface 201 of the guide member 200 and the bottom surface of the shell 100.

[0078] Compared with the solution of allowing the wind to enter the housing 100 directly and vertically upward from the bottom of the housing 100, the embodiment of the present invention provides a guide 200, so that the wind flows from the gap between the guide 200 and the bottom surface of the housing 100 to the air inlet 110, so that the air inlet direction is close to the horizontal direction, so that the air enters the laminar flow fan more smoothly (because the laminar flow fan annular disc 10 is extended horizontally), so that the energy consumption and noise of the laminar flow fan are reduced. In addition, the provision of the guide 200 also makes the bottom appearance of the ceiling-mounted indoor unit (the bottom of which is mainly facing the user) more beautiful, avoiding the appearance affected by the complicated air inlet grille arranged at the bottom of the housing 100.

[0079] Figure 8 This is a schematic diagram of the air supply principle of a laminar flow fan. Figure 8 As shown, the air supply principle of the laminar fan is mainly derived from the "Tesla turbine" discovered by Nikola Tesla. The Tesla turbine mainly uses the "laminar boundary layer effect" or "viscous effect" of the fluid to achieve the purpose of doing work on the "turbine disc". The annular disc 10 rotates at a high speed, and the air in the intervals between the annular discs 10 contacts and moves with each other. The air boundary layer 13 close to the surface of each annular disc 10 is driven by the rotating annular disc 10 to rotate from the inside to the outside to form a laminar wind due to the viscous shear force τ.

[0080] Fig. 9 yes Figure 1 Schematic diagram of air circulation of the laminar flow fan of the embodiment shown. Fig. 9 As shown, an air inlet channel 11 is formed in the center of the annular disk 10 to allow external air to enter. A plurality of air outlet channels 12 are formed in the gaps between the plurality of annular disks 10 to allow laminar wind to blow out. The process in which the air boundary layer 13 rotates from the inside to the outside to form the laminar wind is a centrifugal motion, so the speed when leaving the air outlet channel 12 is greater than the speed when entering the air inlet channel 11.

[0081] Fig.10 FIG. 1 is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention. In some embodiments, the inner diameters of the annular disks of the laminar flow fan can be different. For example Fig.10 , along the axial air inlet direction of the laminar fan (according to Figures 1 to 9 The embodiment shown is from bottom to top), so that the inner diameters of the multiple annular disks 10 are successively reduced. In other words, along the direction of the airflow in the air inlet channel 11, the inner diameter of the annular disk 10 is gradually reduced. In this way, when the air enters the air inlet channel 11 from top to bottom, the airflows at different positions in the radial direction correspond to different annular disks 10, so that the air can flow to each annular disk more evenly, avoiding the difficulty of air entering the upper annular disk, and finally achieving the effect of increasing the air volume.

[0082] Fig.11Schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention. Fig.12 yes Fig.11 Schematic diagram of the relationship between the gradual change in the spacing between multiple annular disks of the laminar fan and the air volume and air pressure.

[0083] In other embodiments, the spacings between adjacent annular discs of the laminar flow fan may be different. Fig.10 As shown, the distance between each adjacent two annular discs 10 can be gradually increased along the axial air inlet direction of the laminar flow fan. In other words, along the direction of the airflow in the air inlet channel 11, the distance between each adjacent two annular discs is gradually increased. The inventor has found through many experiments that such a setting can effectively increase the air volume of the laminar flow fan. For details, refer to Fig.11 .

[0084] Fig.12 The middle horizontal axis shrinking uniform expanding Plate distance increase refers to the change in the distance between two adjacent annular disks 10 from bottom to top, the left vertical axis Mass flowrate refers to the air volume, and the right vertical axis Pressure rise refers to the wind pressure, which refers to the pressure difference between the air outlet channel 12 and the inlet channel 11 of the laminar flow fan. In addition, the distance between two adjacent annular disks 10 has the same change, that is, the distance between two adjacent annular disks 10 increases or decreases by the same value.

[0085] Specifically, Fig.12 The figure shows the relationship between the gradual change in the spacing between the multiple annular disks 10 and the air volume and air pressure when the outer diameter, inner diameter, number, thickness, and rotation speed of the motor 20 of the laminar fan remain unchanged. When all the above-mentioned parameters remain unchanged, the gradual change in the spacing between each two adjacent annular disks 10 in the multiple annular disks 10 has a greater impact on the air volume and a small impact on the wind pressure. When the change in the spacing between two adjacent annular disks 10 along the axial air inlet direction represented by the horizontal axis is a positive number, it means that the aforementioned spacing is gradually increasing; when the change in the spacing between two adjacent annular disks 10 along the axial air inlet direction represented by the horizontal axis is a negative number, it means that the aforementioned spacing is gradually decreasing. The change in the spacing between two adjacent annular disks 10 can be made the same. By Fig.12 It can be seen that when the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 changes by -1 mm, 1 mm and 2 mm, the air volume and air pressure of the laminar flow fan are greatly improved.

[0086] Taking into account the air volume and air pressure of the laminar flow fan, it is preferred to set the spacing between every two adjacent annular discs 10 in the plurality of annular discs 10 to gradually increase along the axial air inlet direction. For example, the outer diameter of the annular disc 10 is 175 mm, the inner diameter of the annular disc 10 is 115 mm, the number of the annular discs 10 is 8, the thickness of the annular disc 10 is 2 mm, and the speed of the motor 20 is 1000 rpm (revolutions per minute). At this time, taking into account the air volume and air pressure of the laminar flow fan, for example, the spacing between two adjacent annular discs 10 in the 8 annular discs 10 can be set to 13.75 mm, 14.75 mm, 15.75 mm, 16.75 mm, 17.75 mm, 18.75 mm, and 19.75 mm in sequence along the axial air inlet direction.

[0087] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A ceiling-mounted air conditioner indoor unit, characterized in that include: A shell having at least one air inlet and at least one air outlet, wherein the air outlet is located on a side of the shell; A heat exchanger is disposed in the shell; a fan, arranged in the housing, for sucking indoor air through the air inlet, causing the indoor air to form heat exchange wind after heat exchange with the heat exchanger, and blowing the heat exchange wind back into the room through the air outlet; and an air duct component, disposed in the housing, and provided with at least one air duct corresponding to the at least one air outlet, for guiding the heat exchange wind to each of the air outlets; and Each of the air ducts is provided with a guide plate or a plurality of guide plates arranged in the up-down direction, so as to separate the internal space of the air duct up and down; The two walls of the air duct in the width direction are vertically symmetrical with respect to the center in the width direction; From the inlet to the outlet of the air duct, the top wall of the air duct is sequentially divided into a plurality of tangentially connected sections, each section gradually tilts downward while extending toward the outlet of the air duct, and the plurality of sections include: A first arc segment, the center of which is located inside the air duct; A second arc segment, the center of which is located inside the air duct and the diameter of which is larger than that of the first arc segment; The first straight line segment; A third arc segment, the center of which is located outside the air duct; and The second straight line segment.

2. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that: The air duct is divided into an inlet section and an outlet section along the flow direction of the heat exchange air, and the flow cross section in the inlet section gradually decreases along the flow direction of the heat exchange air, while the flow cross section in the outlet section remains unchanged along the flow direction of the heat exchange air.

3. The ceiling-mounted air conditioner indoor unit according to claim 2, characterized in that: The number of the guide plates is two; and An air flow channel which tapers along the flow direction of the heat exchange wind is defined between the upper guide plate of the two guide plates and the top wall of the air duct, between the two guide plates, and between the lower guide plate and the bottom wall of the air duct.

4. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that: From the inlet to the outlet of the air duct, the bottom wall of the air duct includes a plurality of tangentially connected sections, which are: A third straight line segment extends horizontally from the air duct inlet to the outlet; a fourth arc segment, the center of which is located inside the air duct and gradually extends upward from the end of the third straight segment; a fourth straight line segment extending upward from the top of the fourth arc segment; a fifth arc segment, the center of which is located outside the air duct and extends upward from the top of the fourth straight segment; a sixth arc segment, the center of which is located outside the air duct and has a smaller diameter than the fifth arc segment, and extends upward from the top of the fifth arc segment; a seventh arc segment, the center of which is located outside the air duct and has a smaller diameter than the sixth arc segment, and extends from the top of the sixth arc segment first upward and then toward the outlet of the air duct; and The fifth straight line segment extends from the end of the seventh arc segment toward the outlet of the air duct and gradually tilts downward.

5. The ceiling-mounted air conditioner indoor unit according to claim 4, characterized in that: The guide plate on the upper side is opposite to the third arc section of the top wall of the air duct, and is curved so as to extend toward the outlet of the air duct and gradually tilt downward with the convex surface facing downward; and The guide plate at the lower side is opposite to the seventh arc segment of the bottom wall of the air duct, and is in a curved shape extending toward the outlet of the air duct while gradually tilting downward with the convex surface facing upward.

6. The ceiling-mounted air conditioner indoor unit according to claim 5, characterized in that: The angle between the tangent line of the end of the guide plate on the upper side away from the air duct outlet and the horizontal plane is between 30° and 60°, and the angle between the tangent line of the end close to the air duct outlet and the horizontal plane is less than or equal to 20°; The angle between the tangent of the end of the guide plate at the lower side away from the air duct outlet and the horizontal plane is 0°, and the angle between the tangent of the end close to the air duct outlet and the horizontal plane is less than or equal to 20°.

7. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that: The number of the air inlet is one, and the air inlet is arranged on the bottom surface of the housing; and The fan is a laminar flow fan, the rotation axis of which extends vertically. When in operation, air is sucked in from the axial bottom thereof, and laminar flow wind is generated by utilizing the viscosity effect of the air and blown out radially.

8. The ceiling-mounted air conditioner indoor unit according to claim 7, characterized in that: The heat exchanger is in the shape of an annular plate or a semi-annular plate with an axis extending in a vertical direction, and is arranged around the laminar flow fan on the radial outer side of the laminar flow fan.

9. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that: The air duct component is in the shape of a cover with an open bottom, and the air duct is formed on its side; The air duct component cover is buckled on the bottom of the shell body so as to cover the heat exchanger and the fan therein.

Images