Ceiling air conditioner indoor unit

Abstract

The present invention provides a ceiling-mounted air-conditioning indoor unit, comprising a shell having an air inlet and an air outlet; a heat exchanger arranged in the shell; a laminar flow fan arranged in the shell, comprising a plurality of annular discs arranged in parallel and fixedly connected to each other, which, when driven to rotate, suck air from an axial end into a cavity on the radial inner side thereof, and then drive the air boundary layer on the surface of the annular disc to rotate and move radially from the inside to the outside due to the viscosity effect of the annular disc to form laminar flow, so as to promote the air to flow from the air inlet through the heat exchanger and then flow to the air outlet to return to the room; and each air outlet is provided with two air guide plates arranged to rotate in opposition, each air guide plate is provided with a plurality of ventilation micropores running through the thickness direction thereof, and the two air guide plates can be rotated away from each other to a position to open the air outlet, so as to guide the outlet direction by utilizing the channel formed between the two, or rotated towards each other to a position to close the air outlet so as to allow the outlet air to flow through the plurality of ventilation micropores and be blown out.

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, reduce air supply noise, and improve noise quality.

[0006] A further object of the present invention is to realize multiple air supply modes, including a strong air supply mode and a windless air supply mode, so as to meet the various air supply needs of users.

[0007] In particular, the present invention provides a ceiling-mounted air conditioner indoor unit, comprising:

[0008] A housing having at least one air inlet and at least one air outlet;

[0009] a heat exchanger disposed within the housing for exchanging heat with air flowing therethrough; and

[0010] A laminar flow fan is arranged in the housing, and includes a plurality of annular discs arranged in parallel and fixedly connected to each other. When the plurality of annular discs are driven to rotate, air is sucked into the radial inner cavity from one axial end, and then the air boundary layer on the surface of the annular disc is driven by the annular disc to rotate and move radially from inside to outside due to the viscosity effect to form a laminar flow wind, so as to promote the air to flow from the air inlet through the heat exchanger and then flow to the air outlet to return to the room; and

[0011] Two air guide plates are arranged to rotate apart from each other at each air outlet, and each air guide plate is provided with a plurality of ventilation micropores running through its thickness direction. The two air guide plates can rotate away from each other to a position to open the air outlet so as to guide the air outlet direction by utilizing the channel formed between the two, or rotate towards each other to a position to close the air outlet so that the air can flow through the plurality of ventilation micropores and be blown out.

[0012] Optionally, at least one air outlet is arranged on the side of the shell, and the length direction of each air outlet is arranged along a horizontal plane; the two ends of the length direction of the two air guide plates of each air outlet are respectively fixed to the shell at the two ends of the length direction of the air outlet, and the two air guide plates are arranged in the up and down directions, the rotation axis of the upper air guide plate is located at its upper end, and the rotation axis of the lower air guide plate is located at its lower end; and multiple ventilation micropores are arranged in a matrix on the air guide plate.

[0013] Optionally, the opening rate of each air guide plate is between 25% and 90%.

[0014] Optionally, the ceiling-mounted air-conditioning indoor unit also includes: a duct component, which is arranged in the shell, and is provided with at least one air duct corresponding to at least one air outlet, for guiding the heat exchange wind to each air outlet; and the air duct is divided into an inlet section and an outlet section along the flow direction of the outlet air flow, and the flow cross-section in its inlet section gradually decreases along the flow direction of the outlet air flow, and the flow cross-section in its outlet section remains unchanged along the flow direction of the outlet air flow.

[0015] Optionally, there is one air inlet, which is arranged on the bottom surface of the shell; and the rotation axis of the laminar flow fan extends in the vertical direction. When running, the air flowing in from the air inlet is sucked in from its axial bottom and blown out radially.

[0016] 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.

[0017] Optionally, the laminar flow fan also includes: a circular disc, located at the non-air inlet axial end of the laminar flow fan, and spaced parallel to and indirectly fixedly connected to the annular disc at this end, the center of the circular disc being recessed inward to form an accommodating cavity; and a motor, which is directly or indirectly fixed to the shell and extends into the accommodating cavity, and its rotating shaft is connected to the circular disc so as to drive the circular disc to rotate, thereby driving multiple annular discs to rotate.

[0018] 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 laminar flow fan therein.

[0019] Optionally, the ceiling-mounted air conditioner indoor unit also includes: a bracket, which includes a horizontally arranged support ring and a plurality of connecting arms extending upward from the edge of the support ring, the plurality of connecting arms being detachably connected to the air duct component; and a motor is installed on the upper side of the support ring to be supported by it, and a rotating shaft of the motor extends downward from the center of the support ring.

[0020] Optionally, the air inlet is circular; the bottom wall of the shell around the air inlet is a guide surface extending radially outward from the edge of the air inlet and gradually tilting downward, and the guide surface is a rotating surface coaxial with the air inlet; and the ceiling-mounted air conditioner indoor unit also includes a guide member, which is arranged at the air inlet, and its outer peripheral surface is a rotating surface that gradually expands radially outward from top to bottom and is coaxial with the air inlet, and is used to guide the indoor air to flow to the air inlet through the gap between the outer peripheral surface of the guide member and the bottom surface of the shell.

[0021] The ceiling-mounted air conditioner indoor unit of the present invention is hoisted on the roof, and the entire side of the shell is fully exposed, so that multiple air outlets can be arranged on the side, thereby realizing multi-directional air supply such as two-sided, three-sided, four-sided air outlets and even 360° circumferential air supply, and the air supply range is extremely large. The ceiling-mounted air conditioner indoor unit adopts a laminar flow fan, which is based on the laminar flow principle to achieve annular air outlet without dead angles, which is convenient for realizing multi-directional air supply of the indoor unit. 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.

[0022] Furthermore, the present invention provides two opposing air guide plates with ventilation micropores at each air outlet. When the two air guide plates open the air outlet, the outlet air flow blows smoothly from the air outlet into the channel defined between the two air guide plates, and then blows into the room. The two air guide plates are equivalent to an extension of the air outlet, which extends the fluid flow channel, thereby making the air supply distance farther and having a noise reduction effect. Moreover, the interval between the two air guide plates can be changed by adjusting the opening angle of the two air guide plates, thereby changing the size of the air outlet cross-section, and then changing the air volume and wind speed. When the two air guide plates close the air outlet, the outlet air flow is blown out through the ventilation micropores to form a breeze, and the user has no sense of wind, avoiding strong wind blowing people to cause air-conditioning disease, which is particularly suitable for mothers and babies.

[0023] Furthermore, the present invention utilizes an air duct to straighten the outlet airflow 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 conditioning. In addition, the tapered design of the flow cross section at the entrance of the air duct can effectively increase the wind speed and increase the air supply distance. After the airflow is increased by the tapered cross section of the entrance section, the airflow enters the outlet section with a constant flow cross section for steady flow, which can further adjust the airflow direction to make the airflow more stable and smooth.

[0024] Furthermore, in the ceiling-mounted air conditioner indoor unit of the present invention, the wind flows from the gap between the guide member and the shell to the air inlet. Compared with some structures that allow the wind to enter the shell directly vertically upward from the bottom of the shell, the guide member guides the wind inlet direction to be close to the horizontal direction, so that the air can enter the laminar flow fan more smoothly, and the energy consumption and noise of the laminar flow fan are reduced. The design of the guide member also makes the bottom appearance of the air conditioner indoor unit more beautiful.

[0025] 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

[0026] 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:

[0027] Figure 1 is a structural schematic diagram of a ceiling-mounted air conditioner indoor unit according to an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A schematic exploded view of the indoor unit of the ceiling mounted air conditioner shown;

[0029] Figure 3 Cut along a vertical plane Figure 1 A cross-sectional view of an indoor unit of a ceiling-mounted air conditioner shown;

[0030] Figure 4 yes Figure 3 Schematic diagram of top and bottom wall profiles of the air duct;

[0031] Figure 5 yes Figure 2 A schematic enlarged view of the fixing frame in FIG.

[0032] Figure 6 is a bottom view schematic diagram of a laminar flow fan;

[0033] Figure 7 This is a schematic diagram of the air supply principle of a laminar flow fan;

[0034] Figure 8 yes Figure 1 A schematic diagram of air circulation of a laminar flow fan of the illustrated embodiment;

[0035] Fig. 9 is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention;

[0036] Fig.10is a schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention;

[0037] Fig.11 yes Fig.10 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

[0038] Refer to the following Figures 1 to 11 The 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.

[0039] 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.

[0040] 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.

[0041] like Figures 1 to 3 As shown, the ceiling-mounted air conditioner indoor unit may generally include a housing 100 , a heat exchanger 400 , and a laminar flow fan 300 .

[0042] 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 can be arranged on the side of the housing 100. The air inlet 110 can be as follows: 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 .

[0043] 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.

[0044] The heat exchanger 400 is disposed in the shell 100, which may be an evaporator of a vapor compression refrigeration cycle, for exchanging heat with the air flowing through it to form heat exchange wind (when cooling, the heat exchange wind is cold wind, and when heating, the heat exchange wind is hot wind).

[0045] The laminar flow fan 300 is arranged in the housing 100, and includes annular disks 10 that are arranged in parallel and fixedly connected to each other. When driven to rotate, the laminar flow fan 300 draws air into the radial inner cavity from one axial end, and then drives the air boundary layer on the surface of the annular disk 10 to rotate radially from the inside to the outside due to the viscosity effect, forming laminar wind, so as to promote the air to flow from the air inlet 110 through the heat exchanger 400 to form heat exchange wind, and then flow to the air outlet 120 to return to the room, thereby realizing cooling / heating of the room.

[0046] like Figures 1 to 3 As shown, two air guide plates 600 are provided at each air outlet 120. Both air guide plates 600 are rotatable, and the two are arranged opposite each other (similar to two opposite doors). The two air guide plates 600 can be rotated away from each other to open the air outlet 120, or rotated towards each other to close the air outlet 120.

[0047] like Figure 3 When the two air guide plates 600 are in the position of opening the air outlet 120, the air flow is blown into the room from the channel formed between the two air guide plates 600, so that the wind direction is guided by the two air guide plates 600. In addition, at this time, the channel between the two air guide plates is equivalent to the extension of the air outlet, which extends the fluid flow channel, makes the air supply distance longer, and has a noise reduction effect.

[0048] like Figure 3 When the air outlet 120 is opened, the two air guide plates 600 can be in a parallel state. In addition, the two air guide plates are equivalent to air gates. The two air guide plates can be gradually brought closer from the inside to the outside so that the internal channel thereof gradually shrinks, thereby reducing the air volume and increasing the wind speed. The two air guide plates can also be gradually moved away from the inside to the outside so that the internal channel thereof gradually expands, thereby reducing the wind speed. In the above three states, the opening angle of the two air guide plates can be further adjusted to adjust the outlet direction thereof to change the air outlet direction. The two air guide plates 600 can also swing back and forth to swing the wind.

[0049] Each air guide plate 600 is provided with a plurality of ventilation micro holes 610 that penetrate the air guide plate 600 along its thickness direction. The plurality of ventilation micro holes 610 may be arranged in a matrix on the air guide plate 600 to make the arrangement more uniform. Figure 1, the air guide plate is provided with 3 rows from top to bottom, with 34 ventilation micropores 610 in each row. The diameter of the ventilation micropores 610 should be small enough, for example, set between 1 and 10 mm, to achieve a breeze outlet effect. For each air guide plate 600, its opening rate can be set between 25% and 90% to have both breeze effect and air volume requirements. For example, 25%, 30%, 50%, 60%, 70%, 80%, 90%, etc. The opening rate refers to the ratio of the total area of ​​all ventilation micropores 610 on the air guide plate 600 to the surface area of ​​one side of the air guide plate 600 (including the opening part and the non-opening part).

[0050] like Figure 1 , the length direction of each air outlet 120 can be arranged along the horizontal plane, and the corresponding two air guide plates 600 are arranged in the up-down direction. And the two ends of the length direction of each air guide plate 600 are respectively fixed to the housing 100 at the two ends of the length direction of the air outlet 120. The rotation axis of the air guide plate 600 extends along its length direction to achieve up-down wind guidance. The rotation axis of the upper air guide plate 600 is located at its upper end, and the rotation axis of the lower air guide plate 600 is located at its lower end, so that the two open / close the air outlet 120 in a split manner.

[0051] Each air outlet 120 has the following two air supply modes.

[0052] First, if Figure 3 The air guide plate 600 opens the air outlet 120, and the air flow is smoothly blown from the air outlet 120 into the channel between the two air guide plates 600, and the air flow direction is guided by the two air guide plates.

[0053] Second, if Figure 1 When the air guide plate 600 closes the air outlet 120, the outlet air flows through the ventilation micropores 610 to form a breeze with small air volume and low wind speed. The user has no sense of wind, avoiding strong winds and causing air-conditioning disease, which is particularly suitable for mothers and babies.

[0054] In some embodiments, the ceiling-mounted air conditioner indoor unit further includes an air duct component 180. 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.

[0055] 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.

[0056] 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 hot outlet airflow. 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 hot outlet airflow. 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 gradually shrinking flow cross-section design of the inlet section of the air duct 182 can effectively increase the wind speed and improve the air supply distance. After the outlet airflow passes through the gradually shrinking cross-section of the inlet section to increase the speed, 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 laminar flow 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.

[0066] 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 300 and can be any U-shaped ring as shown in the figure. The heat exchanger 400 is arranged around the laminar flow fan 300 on the radial outer side of the laminar flow fan 300, so that it does not need to be arranged above or below the laminar flow fan 300, which can save the internal space of the ceiling-mounted air conditioner indoor unit, make the structure more compact, and make the whole unit smaller. In addition, the heat exchanger 400 surrounds the laminar flow fan 300, so that the airflow of the laminar flow fan 300 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.

[0067] Figure 6 3 is a schematic diagram of the laminar flow fan 3 from a bottom perspective. Figure 2 , Figure 3 and Figure 6 As shown, the laminar flow fan 300 may also include a circular disc 30 and a motor 20. The circular disc 30 is located at the non-air inlet axial end of the laminar flow fan 300 (the upper end in the embodiment shown in the figure), and is arranged parallel to and spaced from the annular disc 10 at this end (i.e., the uppermost annular disc) and is indirectly fixedly connected. The center of the circular disc 30 is recessed inward (i.e., downward) to form an accommodating cavity 31. The motor 20 extends into the accommodating cavity 31, and its rotating shaft 21 is connected to the circular disc 30 so as to drive the circular disc 30 to rotate, thereby driving the multiple annular discs 10 to rotate.

[0068] The laminar flow fan 300 may further include a plurality of vertically extending connecting rods 40. One end of the connecting rod 40 is fixed to the circular disc 30, and then vertically extends to penetrate the plurality of annular discs 10 and is fixed to each annular disc 10 to achieve mutual fixation of the plurality of annular discs 10 and the circular disc 30.

[0069] like Figure 3As shown, the laminar flow fan 300 has an axial air intake and radial air outlet structure. It inhales air axially and discharges air radially so as to blow the wind horizontally toward each air outlet 120. The laminar flow fan 300 is based on the laminar flow principle to achieve annular air outlet without dead angles. In addition, the laminar flow fan 300 uses the viscosity of the air boundary layer to do work, and the annular disc 10 is basically parallel to the flow direction of the airflow, which will not strongly disturb the impact airflow and produce violent vortices, thereby greatly reducing its noise and improving the noise quality, which significantly improves the user experience. The more specific principles and structures of the laminar flow fan 300 will be introduced in more detail later.

[0070] like Figure 2 As 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 by it. 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 inlet air flow to flow to the bottom of the laminar flow fan 300 through the vent 801. And, as shown in FIG. Figure 3 After the incoming air flows through the vent 801, it is completely sucked into the laminar flow fan 300, and does not flow directly to the heat exchanger 400 without the action of the laminar flow fan 300, thereby affecting the heat exchange efficiency.

[0071] Figure 5 yes Figure 2 Schematic enlargement of the bracket in FIG. Figure 2 , Figure 3 and Figure 5 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 5 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 300.

[0072] 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.

[0073] 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.

[0074] 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 300 more smoothly (because the annular disc 10 of the laminar flow fan is extended horizontally), so that the energy consumption and noise of the laminar flow fan 300 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.

[0075] Figure 7 This is a schematic diagram of the air supply principle of a laminar flow fan. Figure 7 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.

[0076] Figure 8 yes Figure 1 Schematic diagram of air circulation of the laminar flow fan of the embodiment shown. Figure 8 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.

[0077] Fig. 9 FIG. 3 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 300 may be different. For example Fig. 9 , along the axial air inlet direction of the laminar flow fan 300 (according to Figures 1 to 8The 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.

[0078] Fig.10 Schematic diagram of air circulation of a laminar flow fan according to another embodiment of the present invention. Fig.11 yes Fig.10 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.

[0079] In some other embodiments, the spacings between adjacent annular discs of the laminar flow fan 300 may be different. Fig. 9 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 300. 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.10 .

[0080] Fig.11 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.

[0081] Specifically, Fig.11The 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.11 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.

[0082] 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.

[0083] 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 to cover all such variations or modifications.

Claims

1. A ceiling-mounted air conditioner indoor unit, characterized in that include: A housing having at least one air inlet and at least one air outlet; a heat exchanger, disposed in the housing, for exchanging heat with air flowing therethrough; and a laminar flow fan, arranged in the housing, comprising a plurality of annular discs arranged in parallel and fixedly connected to each other, wherein the plurality of annular discs, when driven to rotate, inhale air from one axial end into a cavity radially inside thereof, and then make the air boundary layer on the surface of the annular disc rotate and move radially from inside to outside due to the viscosity effect by the annular disc to form a laminar flow wind, so as to promote the air to flow from the air inlet through the heat exchanger, and then flow to the air outlet to return to the room; and Two air guide plates are arranged at each air outlet and are rotatably arranged in a split manner. Each air guide plate is provided with a plurality of ventilation micro-holes running through the thickness direction thereof. The two air guide plates can be rotated away from each other to open the air outlet so as to guide the air outlet direction by using the channel formed between the two, or rotated towards each other to close the air outlet so that the air outlet can be blown out through the plurality of ventilation micro-holes. 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; 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 at least one air outlet is arranged on a side surface of the housing, and the length direction of each air outlet is arranged along a horizontal plane; The two ends of the two air guide plates of each air outlet in the length direction are respectively fixed to the shell at the two ends of the air outlet in the length direction, and the two air guide plates are arranged in the up-down direction, the rotation axis of the upper air guide plate is located at its upper end, and the rotation axis of the lower air guide plate is located at its lower end; and The plurality of ventilation micropores are arranged in a matrix on the air guide plate.

3. The ceiling-mounted air conditioner indoor unit according to claim 1, characterized in that: The opening rate of each air guide plate is between 25% and 90%.

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

5. The ceiling-mounted air conditioner indoor unit according to claim 4, 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 rotation axis of the laminar flow fan extends in the vertical direction. When in operation, the laminar flow fan inhales the air flowing in from the air inlet from its axial bottom and blows it outward in the radial direction.

6. The ceiling-mounted air conditioner indoor unit according to claim 5, 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.

7. The ceiling-mounted air conditioner indoor unit according to claim 5, characterized in that: The laminar flow fan also includes: A circular disc is located at the non-air inlet axial end of the laminar flow fan and is arranged parallel to and spaced from the annular disc at the end and is indirectly fixedly connected thereto, wherein the center of the circular disc is recessed inwardly to form an accommodating cavity; and The motor is directly or indirectly fixed to the housing and extends into the accommodating cavity. The rotating shaft of the motor is connected to the circular disc so as to drive the circular disc to rotate, thereby driving the plurality of annular discs to rotate.

8. The ceiling-mounted air conditioner indoor unit according to claim 7, 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 laminar flow fan therein.

9. The ceiling-mounted air conditioner indoor unit according to claim 8, characterized in that Also includes: A bracket, comprising a horizontally arranged supporting ring and a plurality of connecting arms extending upward from an edge of the supporting ring, wherein the plurality of connecting arms are detachably connected to the air duct component; and The motor is mounted on the upper side of the support ring to be supported by the support ring, and the rotating shaft of the motor extends downward from the center of the support ring.

10. The ceiling-mounted air conditioner indoor unit according to claim 5, characterized in that: The air inlet is circular; The bottom wall of the shell around the air inlet is a guide surface extending radially outward from the edge of the air inlet and gradually tilting downward, and the guide surface is a rotating surface coaxial with the air inlet; and The ceiling-mounted air conditioner indoor unit also includes a flow guide member, which is arranged at the air inlet, and its outer peripheral surface is a rotating surface that gradually expands radially outward from top to bottom and is coaxial with the air inlet, and is used to guide indoor air to flow toward the air inlet through the gap between the outer peripheral surface of the flow guide member and the bottom surface of the shell.

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