Vertical air conditioner indoor unit

Abstract

The present invention provides an indoor unit of a vertical air conditioner. The indoor unit of the vertical air conditioner includes: a housing which defines a cavity inside and is provided with an air inlet and an air outlet; an evaporator disposed inside the cavity corresponding to the air inlet and configured to exchange heat with the air entering the cavity through the air inlet; a laminar flow fan disposed inside the cavity and configured to form a laminar flow of air by using the viscous effect and blow the laminar flow of air out from the air outlet; and a double-suction centrifugal fan disposed inside the cavity and configured to send the air that has exchanged heat through the evaporator to the laminar flow fan. The indoor unit of the vertical air conditioner of the present invention is provided with a laminar flow fan, and laminar flow air supply is achieved through the viscous effect. The air supply process has low noise and high air volume, improving the user experience; it is also provided with a double-suction centrifugal fan, which can effectively increase the air volume entering the laminar flow fan, thereby improving the working efficiency of the laminar flow fan.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to an indoor unit of a vertical air conditioner. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, various air conditioning devices have become one of the indispensable electrical appliances in people's daily lives. Various air conditioning devices can help people reach an adaptable temperature when the ambient temperature is too high or too low.

[0003] Currently, the main air conditioning devices mainly include various types of air conditioners and fans. However, most users believe that the hot air or cold air generated by current air conditioners is unevenly distributed in rooms or enclosed spaces, having certain distribution limitations. In addition, the fans used in the indoor units of air conditioners are mainly cross-flow fans. Although cross-flow fans have relatively low noise, their air pressure is too small and the air supply distance is short. Moreover, the overall volume of cross-flow fans is large while the actual effective volume is small, resulting in waste of space. Summary of the Invention

[0004] An object of the present invention is to provide an indoor unit of a vertical air conditioner with low noise, high air volume, and large air pressure.

[0005] A further object of the present invention is to make the air outlet of the indoor unit of the vertical air conditioner uniform and gentle, meeting the comfort requirements of users.

[0006] Specifically, the present invention provides an indoor unit of a vertical air conditioner, including: a housing, which defines an inner cavity, and the housing is provided with an air inlet and an air outlet; an evaporator, disposed inside the cavity corresponding to the air inlet, configured to exchange heat with the air entering the cavity through the air inlet; a laminar flow fan, disposed inside the cavity, configured to form a laminar flow of air by using the viscous effect and blow the laminar flow of air out from the air outlet; and a double-suction centrifugal fan, disposed inside the cavity, configured to send the air that has undergone heat exchange through the evaporator to the laminar flow fan.

[0007] Optionally, the indoor unit of the vertical air conditioner further includes: a volute, which defines a first accommodation cavity and a second accommodation cavity inside, and the first accommodation cavity and the second accommodation cavity are communicated through a communication channel; and the double-suction centrifugal fan is disposed in the first accommodation cavity, and the laminar flow fan is disposed in the second accommodation cavity.

[0008] Optionally, the volute has two inlets and one outlet, and the outlet is disposed opposite to the air outlet; the double-suction centrifugal fan drives the air that has undergone heat exchange through the evaporator to enter the first accommodation cavity from the two inlets, turns and then enters the laminar flow fan in the second accommodation cavity through the communication channel, forms a laminar flow of air and discharges from the outlet, and then blows out through the air outlet.

[0009] Optionally, there are two laminar flow fans, double-suction centrifugal fans and volutes respectively, and the housing includes a front panel, a rear panel, a top panel and a bottom panel, wherein air outlets are provided at the upper and lower parts of the front panel, and an air inlet is provided at the upper middle part of the rear panel.

[0010] Optionally, the laminar flow fan includes: a laminar flow fan including: a plurality of annular disks, which are arranged in parallel at intervals and have the same central axis, and an air inlet passage is formed jointly at the centers of the plurality of annular disks, and the air in the cavity enters the gap between the plurality of annular disks through the air inlet passage; and a laminar flow motor, which is connected to the laminar flow fan and is configured to drive the plurality of annular disks to rotate, so that the air boundary layer near the surfaces of the plurality of annular disks rotates and moves from the inside to the outside, thereby forming a laminar flow of air blown out from the air outlet.

[0011] Optionally, the laminar flow fan further includes: a driving disk, which is arranged in parallel at intervals on one side of the plurality of annular disks; and a connecting member, which penetrates through the driving disk and the plurality of annular disks to connect the plurality of annular disks to the driving disk, and the laminar flow motor is further configured to: directly drive the driving disk to rotate, and then drive the plurality of annular disks to rotate by the driving disk.

[0012] Optionally, a groove is formed at the center of the driving disk facing the plurality of annular disks, and the laminar flow motor is fixedly arranged in the groove; and a cylindrical convex part is provided on the side of the driving disk facing the plurality of annular disks to guide the air flow entering the laminar flow fan and assist in forming a laminar flow of air; or the surface of the driving disk facing the laminar flow motor is a plane, and the surface facing the plurality of annular disks has a conical convex part to guide the air flow entering the laminar flow fan and assist in forming a laminar flow of air.

[0013] Optionally, the connecting member is a connecting piece, and the cross-section of the connecting piece has two curves arranged in sequence along the rotation direction of the annular disk, and the chord lengths of the two curves have a linear relationship with the air volume generated by the laminar flow fan.

[0014] Optionally, the cross-section of the connecting piece has double arcs arranged in sequence along the rotation direction of the annular disk: an inner arc and a back arc, and both the inner arc and the back arc bulge towards the rotation direction of the annular disk, and the inner arc and the back arc have the same center and are arranged in parallel or have different centers and intersect at both ends.

[0015] Optionally, the plurality of annular disks are arranged in one or more of the following structures: the inner diameters of the plurality of annular disks gradually decrease from the side far away from the driving disk to the other side; the distance between adjacent two of the plurality of annular disks gradually increases from the side far away from the driving disk to the other side; each annular disk is an arc-shaped disk that gradually approaches the driving disk from the center to the edge and bulges towards the driving disk side.

[0016] The indoor unit of the vertical air conditioner of the present invention includes: a housing, which defines a cavity inside, and the housing is provided with an air inlet and an air outlet; an evaporator, which is arranged inside the cavity corresponding to the air inlet, and is configured to exchange heat with the air entering the cavity through the air inlet; a laminar flow fan, which is arranged inside the cavity, and is configured to form a laminar flow of air by using the viscous effect and make the laminar flow of air blow out from the air outlet; and a double-suction centrifugal fan, which is arranged inside the cavity, and is configured to send the air that has been heat-exchanged by the evaporator to the laminar flow fan. The indoor unit of the vertical air conditioner is provided with a laminar flow fan, and laminar flow air supply is realized through the viscous effect. The noise is small and the air volume is high during the air supply process, effectively improving the user experience; a double-suction centrifugal fan is also provided, which can effectively increase the air volume entering the laminar flow fan, and then improve the working efficiency of the laminar flow fan.

[0017] Further, the indoor unit of the vertical air conditioner of the present invention further includes: a volute, which defines a first accommodation cavity and a second accommodation cavity inside, and the first accommodation cavity and the second accommodation cavity are communicated through a communication channel; and the double-suction centrifugal fan is arranged in the first accommodation cavity, and the laminar flow fan is arranged in the second accommodation cavity. The volute has two inlets and one outlet, and the outlet is arranged opposite to the air outlet; the double-suction centrifugal fan drives the air that has been heat-exchanged by the evaporator to enter the first accommodation cavity from the two inlets, turns and then enters the laminar flow fan in the second accommodation cavity through the communication channel, forms a laminar flow of air and discharges from the outlet, and then blows out through the air outlet. There are two laminar flow fans, double-suction centrifugal fans and volutes, and the housing includes a front panel, a rear panel, a top panel and a bottom panel, wherein air outlets are arranged at the upper and lower parts of the front panel, and an air inlet is arranged in the upper middle part of the rear panel. The two groups of double-suction centrifugal fans and laminar flow fans in the upper and lower parts can enable the air volume and air supply comfort of the indoor unit of the vertical air conditioner to meet the needs of users.

[0018] Furthermore, for the indoor unit of the vertical air conditioner of the present invention, the multiple annular discs of the laminar flow fan can be arranged in one or more of the following structures: the inner diameters of the multiple annular discs gradually decrease from the side away from the driving disc to the other side; the distance between two adjacent annular discs among the multiple annular discs gradually increases from the side away from the driving disc to the other side; each annular disc is an arc-shaped disc that gradually approaches the driving disc from the center to the edge and protrudes toward the driving disc. The above forms of arranging the multiple annular discs can effectively improve the air volume of the laminar flow fan, so that the air output of the laminar flow fan meets the user's usage requirements. In addition, the connecting member can be a connecting piece, and the cross-section of the connecting piece has two curves arranged in sequence along the rotation direction of the annular disc, and the chord lengths of the two curves have a linear relationship with the air volume generated by the laminar flow fan. The setting of the connecting piece can effectively improve the air pressure of the laminar flow fan, so that after the laminar air blows out through the gaps between the multiple annular discs, due to the pressure difference, the air outside the laminar flow fan is pressed into the annular disc through the air inlet channel, and so on in a cycle, thereby forming a laminar air circulation. The multiple air outlets formed by the gaps between the multiple annular discs can enable the laminar flow fan to achieve 360° air supply, avoiding various discomfort symptoms caused by the direct blowing of the air conditioner to the user, and further improving the user's usage experience.

[0019] From 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 apparent about the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an exemplary but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0021] Figure 1 is a schematic diagram of the indoor unit of the vertical air conditioner according to an embodiment of the present invention located in a room;

[0022] Figure 2 is a schematic diagram of the overall structure of the indoor unit of the vertical air conditioner according to an embodiment of the present invention;

[0023] Figure 3 is Figure 2 a schematic exploded view of the components of the indoor unit of the vertical air conditioner;

[0024] Figure 4 is a schematic diagram of the air circulation of the laminar flow fan in the indoor unit of the vertical air conditioner according to an embodiment of the present invention;

[0025] Figure 5Schematic diagram of the air supply principle of the laminar flow fan in the indoor unit of a floor-standing air conditioner according to an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the speed distribution and force distribution of the laminar flow fan in the indoor unit of a floor-standing air conditioner according to an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the laminar flow fan with a groove on the driving disc;

[0028] Figure 8 Is Figure 7 Schematic diagram of the structure of the laminar flow fan from another perspective;

[0029] Figure 9 Schematic diagram of the connection between the laminar flow fan with a conical protrusion on the driving disc and the laminar flow motor;

[0030] Figure 10 Is Figure 9 Schematic diagram of the structure of the laminar flow fan;

[0031] Figure 11 Is Figure 9 Schematic cross-sectional view of the laminar flow fan;

[0032] Figure 12 Is Figure 11 Schematic diagram of the relationship between the chord length of the connecting piece and the air volume and air pressure;

[0033] Figure 13 Is Figure 11 Schematic diagram of the relationship between the installation angle of the connecting piece and the air volume and air pressure;

[0034] Figure 14 Schematic cross-sectional view of the laminar flow fan with aviation blades;

[0035] Figure 15 Is Figure 14 Schematic diagram of the relationship between the installation angle of the aviation blades of the laminar flow fan and the air volume and air pressure;

[0036] Figure 16 Schematic diagram of the connection between the laminar flow fan with gradually changing spacing of multiple annular discs and the laminar flow motor;

[0037] Figure 17 Is Figure 16 Schematic diagram of the connection between the laminar flow fan and the laminar flow motor from another perspective;

[0038] Figure 18 Is Figure 16 Schematic diagram of the relationship between the gradually changing spacing of multiple annular discs of the laminar flow fan and the air volume and air pressure;

[0039] Figure 19Partial cross-sectional view of a laminar flow fan with gradually changing inner diameters of multiple annular discs;

[0040] Figure 20 is Figure 19 Schematic diagram showing the relationship between the gradually changing inner diameters of multiple annular discs of the laminar flow fan in the middle and the air volume and air pressure;

[0041] Figure 21 Schematic diagram of the central angle of the connecting lines of the inner and outer diameters of multiple annular discs of a laminar flow fan with arc-shaped annular discs on the same longitudinal section passing through the central axis; and

[0042] Figure 22 is Figure 21 Schematic diagram showing the relationship between the central angle in [[ ]] and the air volume and air pressure. Detailed implementation manner

[0043] This embodiment provides a vertical air conditioner indoor unit, which is provided with a laminar flow fan and realizes laminar air supply through the viscous effect. The air supply process has low noise, high air volume, and high air pressure, effectively improving the user experience; it is also provided with a double-suction centrifugal fan, which can effectively improve the air volume and air pressure at the lower part. Figure 1 Schematic diagram of the vertical air conditioner indoor unit 300 located in the room 700 according to an embodiment of the present invention, Figure 2 Overall structure schematic diagram of the vertical air conditioner indoor unit 300 according to an embodiment of the present invention, Figure 3 is Figure 2 Exploded view of the components of the vertical air conditioner indoor unit 300 in [[ ]], Figure 4 Air circulation schematic diagram of the laminar flow fan 100 in the vertical air conditioner indoor unit 300 according to an embodiment of the present invention, Figure 5 Air supply principle schematic diagram of the laminar flow fan 100 in the vertical air conditioner indoor unit 300 according to an embodiment of the present invention, Figure 6 Velocity distribution and force distribution diagram of the laminar flow fan 100 in the vertical air conditioner indoor unit 300 according to an embodiment of the present invention, Figure 7 Structure schematic diagram of the laminar flow fan 100 with the driving disc 30 having the groove 32, Figure 8 is Figure 7 Structure schematic diagram of another perspective of the laminar flow fan 100 in [[ ]]. As Figures 1 to 4 shown, the vertical air conditioner indoor unit 300 generally may include: a housing 310, an evaporator 381, a laminar flow fan 110, and a double-suction centrifugal fan 610.

[0044] Among them, the interior of the housing 310 defines a cavity, and the housing 310 is provided with an air inlet 330 and an air outlet 320. The evaporator 381 is disposed inside the cavity corresponding to the air inlet 330 and is configured to exchange heat for the air entering the cavity through the air inlet 330. Among them, the evaporator 381 may specifically be in various shapes,Figure 3 The evaporator 381 shown in Figure 3 is U-shaped. It should be noted that the shape and size of the evaporator 381 can be set to match the air inlet 330, so that all the air entering the cavity through the air inlet 330 can pass through the evaporator 381 for heat exchange. In addition, a water receiving tray (not shown in the figure) can be provided below the evaporator 381 to receive the condensed water generated by the evaporator 381.

[0045] The laminar flow fan 110 can be arranged inside the cavity and configured to form a laminar flow of air by using the viscous effect and blow the laminar flow of air out from the air outlet 320. The laminar flow fan 110 can include a laminar flow fan 100 and a laminar flow motor 20. The laminar flow fan 100 includes: a plurality of annular disks 10, which are arranged in parallel at intervals and have the same central axis. An air inlet passage 11 is formed in common at the centers of the plurality of annular disks 10, and the air in the cavity enters the gap between the plurality of annular disks 10 through the air inlet passage 11. The laminar flow motor 20 is connected to the laminar flow fan 100 and configured to drive the plurality of annular disks 10 to rotate, so that the air boundary layer 13 near the surfaces of the plurality of annular disks 10 rotates and moves from the inside to the outside, thereby forming a laminar flow of air blown out from the air outlet 320. It should be noted that the laminar flow fan 100 is arranged inside the cavity corresponding to the air outlet 320 to enable the laminar flow of air to smoothly flow out from the air outlet 320.

[0046] Specifically, the laminar flow motor 20 drives the plurality of annular disks to rotate, so that the plurality of annular disks come into contact with the air between them and move relative to each other. Furthermore, the air boundary layer 13 near the surfaces of the plurality of annular disks is driven by the rotating plurality of annular disks to rotate and move from the inside to the outside due to the viscous effect to form a laminar flow of air. A plurality of air outlet openings 12 are formed in the gap between the plurality of annular disks, and each air outlet opening 12 can achieve 360° air supply. The laminar flow of air discharged from the air outlet openings 12 is blown out through the air outlet 320 to the environment outside the indoor unit 300 of the vertical air conditioner. The laminar flow fan can achieve 360° air supply, but the air outlet 320 can be set according to actual conditions and can achieve different ranges of air supply respectively.

[0047] The double-suction centrifugal fan 610 is arranged inside the cavity and configured to send the air that has passed through the heat exchange of the evaporator 381 to the laminar flow fan 110. The double-suction centrifugal fan 610 can include a double-suction centrifugal fan 611 and a centrifugal motor 612. The centrifugal motor 612 drives the double-suction centrifugal fan 611 to rotate. The double-suction centrifugal fan 610 takes in air axially and discharges air radially to achieve air turning. The indoor unit 300 of the vertical air conditioner can further include: a volute 520, which defines a first accommodation cavity 523 and a second accommodation cavity 524 inside. The first accommodation cavity 523 and the second accommodation cavity 524 are communicated through a communication channel 525; and the double-suction centrifugal fan 610 is arranged in the first accommodation cavity 523, and the laminar flow fan 110 is arranged in the second accommodation cavity 524.

[0048] The volute 520 has two inlets 522 and one outlet 521, and the outlet 521 is oppositely arranged to the air outlet 320; the double-suction centrifugal fan 610 drives the air heated by the evaporator 381 to enter the first accommodation cavity 523 from the two inlets 522, and after turning, enters the laminar flow fan 110 in the second accommodation cavity 524 through the communication channel 525, forming laminar flow air discharged from the outlet 521, and then blown out through the air outlet 320. Among them, the laminar flow fan 110 that enters the second accommodation cavity 524 through the communication channel 525 after turning as described above specifically enters the air inlet channel 11 of the laminar flow fan 100. The shapes and sizes of the outlet 521 and the air outlet 320 are matched so that the laminar flow air discharged from the outlet 521 can all be blown out through the air outlet 320 without blowing to other positions in the cavity, avoiding affecting the normal operation of other components in the cavity.

[0049] In a specific embodiment, there are two laminar flow fans 110, two double-suction centrifugal fans 610 and two volutes 520, and the housing 310 includes a front panel 311, a rear panel 315, a top panel 313 and a bottom panel 314. Among them, air outlets 320 are provided at the upper and lower parts of the front panel 311, and an air inlet 330 is provided in the upper middle part of the rear panel 315. That is to say, a set of double-suction centrifugal fans 610 and laminar flow fans 110 are respectively provided at the upper and lower parts of the indoor unit 300 of the vertical air conditioner. Using the principle that cold air descends and hot air rises, when the indoor unit 300 of the vertical air conditioner is in the cooling mode, the rotational speeds of the upper centrifugal motor 612 and the laminar flow motor 20 are relatively high, and the whole space can be cooled as soon as possible; when the indoor unit 300 of the vertical air conditioner is in the heating mode, the rotational speeds of the lower centrifugal motor 612 and the laminar flow motor 20 are relatively high, and the hot air can directly reach the feet of the user, better meeting the use requirements of the user.

[0050] The cross-section of the housing 310 in this embodiment is circular, and in some other embodiments, it can also be in other shapes such as quadrilateral. In addition, in this embodiment, only the front panel 311 is provided with an air outlet 320, which can achieve 180° air outlet. In some other embodiments, air outlets 320 can also be provided on both the front panel 311 and the rear panel 315. By arranging the air outlets 320 around the laminar flow fan 100 for one week, 360° air supply can be achieved. However, it should be noted that at this time, the outlet 521 of the volute 520 should also be matched and set to 360° exhaust. The air inlet 330 of the housing 310 can be set in the form of an air inlet grille, which can suck indoor air into the cavity from different directions and filter the air. A wind deflector 321 can be provided at the air outlet 320 of the housing 310 to adjust the air outlet direction of the indoor unit 300 of the floor-standing air conditioner. In addition, a wind baffle 322 can be provided at the air outlet 320 of the housing 310, which can be opened and closed in a sliding manner. After being closed, the air outlet 320 can be completely shielded, improving the overall aesthetics of the indoor unit 300 of the floor-standing air conditioner and effectively preventing dust from entering the air outlet 320.

[0051] As Figure 4 shown, the laminar flow fan 100 can also include: a driving disc 30 and a connecting member. Among them, the driving disc 30 is disposed parallel to one side of a plurality of annular discs 10 at intervals. The connecting member passes through the driving disc 30 and a plurality of annular discs 10 to connect the plurality of annular discs 10 to the driving disc 30. As Figure 7 shown, the connecting member can be a connecting piece 40. The laminar flow motor 20 can also be configured to: directly drive the driving disc 30 to rotate, and then drive the plurality of annular discs 10 to rotate by the driving disc 30. That is to say, the laminar flow motor 20 configured to drive the plurality of annular discs 10 to rotate mentioned above depends on the laminar flow motor 20 first driving the driving disc 30 to rotate, and then the driving disc 30 driving the plurality of annular discs 10 to rotate. In a specific embodiment, the radius of the driving disc 30 and the outer diameter of the plurality of annular discs 10 are the same, and can be set within a certain range, such as 170 mm to 180 mm, so as to restrict the lateral occupied volume of the laminar flow fan 100. By cooperating with limiting the number of annular discs 10 and the distance between two adjacent annular discs 10, the longitudinal thickness of the laminar flow fan 100 can be restricted, and the overall occupied volume of the laminar flow fan 100 can be effectively restricted. It should be noted that the inner diameter of the annular disc 10 refers to the radius of its inner circumference; the outer diameter refers to the radius of its outer circumference. The specific numerical value of the outer diameter of the above-mentioned annular disc 10 is only an example, and is not a limitation of the present invention.

[0052] As Figure 4As shown, a plurality of annular discs 10 jointly form an air inlet passage 11 at their centers to allow air outside the laminar flow fan 100 to enter. A plurality of air outlet openings 12 are formed in the gaps between the plurality of annular discs 10 for the laminar flow air to blow out. The process in which the air boundary layer 13 rotates and moves from the inside to the outside to form laminar flow air is a centrifugal motion, so the speed when leaving the air outlet opening 12 is greater than the speed when entering the air inlet passage 11. The pressure difference between the air outlet 12 of the laminar flow fan 100 and the inlet of the air inlet passage 11 is the wind pressure. The plurality of air outlet openings 12 formed in the gaps between the plurality of annular discs 10 can enable the laminar flow fan 100 to achieve 360° uniform air supply, avoiding various discomfort symptoms caused by the direct blowing of the vertical air conditioner indoor unit 300, and further improving the user experience.

[0053] The air supply principle of the laminar flow fan 100 mainly comes 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". In this embodiment, the laminar flow motor 20 drives the driving disc 30 of the laminar flow fan 100, and the driving disc 30 drives a plurality of annular discs 10 to rotate at high speed. The air in the intervals between the annular discs 10 comes into contact and moves relative to each other. Then, the air boundary layer 13 near the surface of each annular disc 10 is driven by the rotating annular disc 10 to rotate and move from the inside to the outside to form laminar flow air due to the action of the viscous shear force τ.

[0054] Figure 6 Shown is a schematic diagram of the distribution of the viscous shear force τ(y) and the velocity distribution u(y) received by the air boundary layer 13. The viscous shear force received by the air boundary layer 13 is actually the resistance generated by each annular disc 10 on the air boundary layer 13. Figure 6 In the horizontal axis refers to the distance in the moving direction of the air boundary layer 13, and the vertical axis refers to the height of the air boundary layer 13 in the direction perpendicular to the moving direction. v e is the air flow velocity at each point in the air boundary layer 13, δ is the thickness of the air boundary layer 13, τ w is the viscous shear force at the surface of the annular disc 10. The variable y in τ(y) and u(y) refers to the height of the cross-section of the air boundary layer 13 in the direction perpendicular to the moving direction, and L is the distance between a point on the inner circumference of the annular disc 10 and a point on the surface of the annular disc 10. Then τ(y) is the distribution of the viscous shear force received by the air boundary layer 13 at the height y of the cross-section of the air boundary layer 13 at the distance L; u(y) is the velocity distribution of the air boundary layer 13 at the height y of the cross-section of the air boundary layer 13 at the distance L.

[0055] Figure 7 and Figure 8The driving disc 30 of the laminar flow fan 100 shown has a groove 32 formed at the center thereof toward the plurality of annular discs 10, and the laminar flow motor 20 is fixedly disposed in the groove 32. In addition, the driving disc 30 has a cylindrical protrusion 31 on one side thereof facing the plurality of annular discs 10 to guide the air flow entering the laminar flow fan 100 and assist in forming laminar wind.

[0056] In another embodiment, Figure 9 3 is a schematic diagram of the connection between the laminar flow fan 100 having a driving disk 30 with a conical protrusion 31 and the laminar flow motor 20. Figure 10 yes Figure 9 A schematic diagram of the structure of the middle laminar flow fan 100,

[0057] Figure 11 yes Figure 9 Schematic diagram of a cross-section of a mid-flow fan 100 . Figures 9 to 11 The surface of the driving disk 30 of the laminar flow fan 100 facing the laminar flow motor 20 is flat, and the surface facing the plurality of annular disks 10 has a conical protrusion 31 to guide the air flow entering the laminar flow fan 100 and assist in forming laminar wind.

[0058] The main function of the driving disc 30 is to fix the laminar flow motor 20 and connect with the multiple annular discs 10 through the connecting piece, so as to drive the multiple annular discs 10 to rotate when the laminar flow motor 20 drives the driving disc 30 to rotate. Whether the protrusion 31 is cylindrical or conical, it can effectively guide the air entering the laminar flow fan 100 through the air inlet channel 11 into the gap between the annular discs 10, thereby improving the efficiency of forming laminar wind.

[0059] In a preferred embodiment, Figures 9 to 11 As shown, the connecting piece is a connecting piece 40, and the cross section of the connecting piece 40 has two curves arranged in sequence along the direction of rotation of the annular disc 10, and the chord length of the two curves is linearly related to the air volume generated by the laminar flow fan 100. The connecting piece 40 can be provided in plurality, and evenly spaced through the driving disc 30 and the plurality of annular discs 10. The plurality of connecting pieces 40 evenly spaced through the driving disc 30 and the plurality of annular discs 10 can ensure a stable connection relationship between the driving disc 30 and the plurality of annular discs 10, thereby ensuring that when the laminar flow motor 20 drives the driving disc 30 to rotate, the driving disc 30 can stably drive the plurality of annular discs 10 to rotate, thereby improving the working reliability of the laminar flow fan 100.

[0060] It should be noted that the two curves 41 and 42 can be arcs, non-circular arcs, straight lines, etc. A straight line can be regarded as a special curve. When the distance between the two endpoints of curve 41 is the same as the distance between the two endpoints of curve 42, the length of the chord line 51 can be the distance between the two endpoints of curve 41 or curve 42. When the distance between the two endpoints of curve 41 is different from the distance between the two endpoints of curve 42, if neither end of curve 41 and curve 42 intersects, the length of the chord line 51 can be the length of the connection line between the midpoints of the curves other than curves 41 and 42 in the cross-section of the connecting piece 40; if only one end of curve 41 and curve 42 intersects, the length of the chord line 51 can be the length of the connection line between the midpoint of the curve other than curves 41 and 42 in the cross-section of the connecting piece 40 and the intersecting endpoint.

[0061] As Figure 11 shown, the connecting piece 40 can be a double-arc blade 401, and its cross-section has double arcs arranged in sequence along the rotation direction of the annular disc 10: the inner arc 41 and the back arc 42, and both the inner arc 41 and the back arc 42 bulge in the rotation direction of the annular disc 10, have the same center of circle and are arranged in parallel. Figure 11 Actually, it shows a schematic cross-sectional view when looking down at the laminar flow fan 100. The laminar flow motor 20 drives the annular disc 10 to rotate clockwise, and the bulging directions of the back arc 42 and the inner arc 41 are the same as the rotation direction of the annular disc 10. In some other embodiments, the laminar flow motor 20 can also drive the annular disc 10 to rotate counterclockwise. At this time, the bulging directions of the back arc 42 and the inner arc 41 can be Figure 11 opposite to those shown in

[0062] Figure 12 is Figure 11 a schematic diagram of the relationship between the chord line 51 length of the connecting piece 40 in Figure 11 and the air volume and air pressure. Since Figure 12 the connecting piece 40 of the laminar flow fan 100 in Figure 12Shown is a schematic diagram of the relationship between the length of the chord line 51 and the air volume and air pressure when the outer diameter, inner diameter, number of layers, spacing, thickness of the annular disc 10 of the laminar flow fan 100, the installation angle of the connecting piece 40, and the rotational speed of the laminar flow motor 20 all remain unchanged. The installation angle of the connecting piece 40 in this embodiment may be: on the same cross-section of the connecting piece 40 and the annular disc 10, the included angle formed by the chord line 51 between the two end points of the inner arc 41 and the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51.

[0063] When the above-mentioned parameters all remain unchanged, for example, in a preferred embodiment, the outer diameter of the annular disc 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disc 10 is 115 mm, the number of layers of the annular disc 10 is 8 layers, the spacing of the annular disc 10 is 13.75 mm, the thickness of the annular disc 10 is 2 mm, the installation angle of the connecting piece 40 is 25.5°, and the rotational speed of the laminar flow motor 20 is 1000 rpm (revolutions per minute). It can be found that after increasing the length of the chord line 51, both the air volume and air pressure have been greatly improved and are basically linear. Considering the limited internal space of the indoor unit 300 of the vertical air conditioner, there is a certain constraint on the overall occupied volume of the laminar flow fan 100. When the outer diameter and inner diameter of the annular disc 10 are fixed, although the longer the chord line 51, the greater the air volume and air pressure of the laminar flow fan 100, but the length of the chord line 51 also needs to be constrained to avoid the connecting piece 10 penetrating the annular disc 10 excessively, resulting in a decrease in the stability of the laminar flow fan 100. All in all, the length of the chord line 51 can be set to the maximum achievable range so that the air volume and air pressure of the laminar flow fan 100 can meet the user's usage requirements.

[0064] Therefore, in the above-mentioned preferred embodiment, on the premise of ensuring the stability of the laminar flow fan 100, the maximum achievable range for setting the length of the chord line 51 is: 40 mm to 42 mm. And when the length of the chord line 51 is set to 42 mm, the air volume of the laminar flow fan 100 can reach 1741 m 3 / h, and the air pressure can reach 118.9 Pa, which can fully meet the user's usage requirements. At this time, the difference between the outer diameter and the inner diameter of the annular disc 10 is 60 mm. Setting the length of the chord line 51 to 42 mm can make the two ends of the inner arc 41 and the back arc 42 have a distance of about 9 mm from the inner circumference and the outer circumference of the annular disc 10 respectively. On the premise of ensuring the stability of the laminar flow fan 100, setting the length of the chord line 51 to the maximum achievable range enables the air volume and air pressure of the laminar flow fan 100 to meet the user's usage requirements.

[0065] Figure 13 is Figure 11 a schematic diagram of the relationship between the installation angle α of the connecting piece 40 in and the air volume and air pressure. Since Figure 11The connecting piece 40 of the middle laminar flow fan 100 can be a double-arc blade 401. The installation angle α of the connecting piece 40 actually refers to: on the same cross-section of the double-arc blade 401 and the annular disc 10, the included angle formed by the chord line 51 between the two end points of the inner arc 41 and the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51. Figure 13 The horizontal axis Metal angle(α) refers to the installation angle of the double-arc blade 401 of the laminar flow fan 100, that is, on the same cross-section of the double-arc blade 401 and the annular disc 10, the included angle formed by the chord line 51 between the two end points of the inner arc 41 and the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51. The left vertical axis Mass flow rate refers to the air volume, and the right vertical axis Pressure rise refers to the wind pressure. Specifically, Figure 13 It shows a schematic diagram of the relationship between the installation angle α and the air volume and wind pressure when the outer diameter, inner diameter, number of layers, spacing, thickness of the annular disc 10 of the laminar flow fan 100, the chord length of the double-arc blade 401, and the rotation speed of the laminar flow motor 20 remain unchanged. The chord length of the double-arc blade 401 in this embodiment can be the straight-line distance between the two end points of the inner arc 41 or the back arc 42.

[0066] When the above-mentioned parameters remain unchanged, for example, in a preferred embodiment, the outer diameter of the annular disc 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disc 10 is 115 mm, the number of layers of the annular disc 10 is 8, the spacing of the annular disc 10 is 13.75 mm, the thickness of the annular disc 10 is 2 mm, the chord length of the double-arc blade 401 is 35 mm, and the rotation speed of the laminar flow motor 20 is 1000 rpm (revolutions per minute). At this time, considering the air volume and wind pressure comprehensively, the installation angle α of the double-arc blade 401 can be set to -5° to 55°. It should be noted that when the chord line 51 between the two end points of the inner arc 41 and the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51 are in turn along the rotation direction of the annular disc 10, the installation angle α is a positive number; when the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51 and the chord line 51 between the two end points of the inner arc 41 are in turn along the rotation direction of the annular disc 10, the installation angle α is a negative number.

[0067] Figure 14 It is a schematic cross-sectional view of the laminar flow fan 100 with an aviation blade 402. Figure 15 is Figure 14Schematic diagram of the relationship between the installation angle α of the aviation blade 402 of the middle laminar flow fan 100 and the air volume and air pressure. In a specific embodiment, the connecting piece 40 can also be the aviation blade 402. The cross-section of the aviation blade 402 has a double arc convex in the direction of rotation of the annular disc 10, and the double arc includes an inner arc 41 and a back arc 42 arranged in sequence along the direction of rotation of the annular disc 10. The inner arc 41 and the back arc 42 have different centers and intersect at both ends. Figure 14 Actually shown is a schematic cross-sectional view when looking down at the laminar flow fan 100. The laminar flow motor 20 drives the annular disc 10 to rotate clockwise, and the protruding directions of the back arc 42 and the inner arc 41 are the same as the direction of rotation of the annular disc 10. In some other embodiments, the laminar flow motor 20 can also drive the annular disc 10 to rotate counterclockwise. At this time, the protruding directions of the back arc 42 and the inner arc 41 can be Figure 14 opposite to those shown in

[0068] Figure 15 The installation angle α of the aviation blade 402 in actually refers to: on the same cross-section of the aviation blade 402 and the annular disc 10, the included angle formed by the chord line 51 between the two endpoints of the inner arc 41 or the back arc 42 and the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51. Figure 15 In , the horizontal axis Metal angle (α) refers to the installation angle of the aviation blade 402 of the laminar flow fan 100, that is, on the same cross-section of the aviation blade 402 and the annular disc 10, the included angle formed by the chord line 51 between the two endpoints of the inner arc 41 or the back arc 42 and the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51. The left vertical axis Mass flow rate refers to the air volume, and the right vertical axis Pressure rise refers to the air pressure. Specifically, Figure 15 Shown is a schematic diagram of the relationship between the installation angle α and the air volume and air pressure when the outer diameter, inner diameter, number of layers, spacing, thickness of the annular disc 10 of the laminar flow fan 100, the chord length of the aviation blade 402, and the rotational speed of the laminar flow motor 20 remain unchanged. The chord length of the aviation blade 402 in this embodiment can be the straight-line distance between the two endpoints of the inner arc 41 or the back arc 42, that is, the length of the chord line 51.

[0069] When the above-mentioned parameters remain unchanged, for example, in a preferred embodiment, the outer diameter of the annular disc 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disc 10 is 115 mm, the number of layers of the annular disc 10 is 8, the spacing of the annular disc 10 is 13.75 mm, the thickness of the annular disc 10 is 2 mm, the chord length of the aviation blade 402 is 35 mm, and the rotational speed of the laminar flow motor 20 is 1000 rpm (revolutions per minute, r / min). At this time, considering the air volume and air pressure comprehensively, the installation angle α of the aviation blade 402 can be set to -50° to 15°.

[0070] Figure 16 It is a schematic connection diagram of a laminar flow fan 100 with gradually changing spacing between multiple annular discs 10 and a laminar flow motor 20. Figure 17 is Figure 16 A schematic connection diagram of the laminar flow fan 100 and the laminar flow motor 20 from another perspective in the middle.

[0071] Figure 18 is Figure 16 A schematic diagram showing the relationship between the gradually changing spacing of multiple annular discs 10 of the laminar flow fan 100 and the air volume and air pressure.

[0072] As Figure 16 and Figure 17 shown, the connecting member of the laminar flow fan 100 can also be a connecting rod 60. The connecting rod 60 can also be provided in multiple numbers and penetrate through the driving disc 30 and multiple annular discs 10 at equal intervals to ensure the stable connection relationship between the driving disc 30 and multiple annular discs 10. Furthermore, when the laminar flow motor 20 drives the driving disc 30 to rotate, the driving disc 30 can stably drive multiple annular discs 10 to rotate, improving the working reliability of the laminar flow fan 100. As the distance between adjacent two annular discs 10 gradually increases from the side away from the driving disc 30 to the other side, the air volume of the laminar flow fan 100 will be effectively increased, enabling the air output of the laminar flow fan 100 to meet the user's usage requirements. In a preferred embodiment, the change amount of the distance between adjacent two annular discs 10 is the same, that is to say, the increased value of the distance between adjacent two annular discs 10 from the side away from the driving disc 30 to the other side is the same.

[0073] Figure 18 In [diagram], the horizontal axis "shrinking uniform expanding Plate distance increase" refers to the change amount of the distance between adjacent two annular discs 10 along the direction from the side away from the driving disc 30 to the other side. The left vertical axis "Mass flow rate" refers to the air volume, and the right vertical axis "Pressure rise" refers to the air pressure. And, the change amount of the distance between adjacent two annular discs 10 is the same, that is to say, the increased or decreased value of the distance between adjacent two annular discs 10 is the same.

[0074] Specifically, Figure 18 shows a schematic diagram of the relationship between the gradually changing spacing of multiple annular discs 10 and the air volume and air pressure when the outer diameter, inner diameter, quantity, thickness of the annular discs 10 of the laminar flow fan 100 and the rotational speed of the laminar flow motor 20 remain unchanged. As Figure 18As shown, when all the above-mentioned parameters remain unchanged, the distance between each two adjacent annular disks 10 in the plurality of annular disks 10 gradually changes from the side away from the driving disk 30 to the other side, which has a greater impact on the air volume and a small impact on the wind pressure. When the change in the distance between two adjacent annular disks 10 along the direction from the side away from the driving disk 30 to the other side represented by the abscissa axis is a positive number, it means that the distance between each two adjacent annular disks 10 in the plurality of annular disks 10 gradually increases from the side away from the driving disk 30 to the other side; when the change in the distance between two adjacent annular disks 10 along the direction from the side away from the driving disk 30 to the other side represented by the abscissa axis is a negative number, it means that the distance between each two adjacent annular disks 10 in the plurality of annular disks 10 gradually decreases from the side away from the driving disk 30 to the other side.

[0075] Depend on Figure 18 It can be seen that when the distance between each two adjacent annular discs 10 in the plurality of annular discs 10 varies by -1 mm, 1 mm, and 2 mm, the air volume and air pressure of the laminar flow fan 100 are greatly improved. Taking the air volume and air pressure of the laminar flow fan 100 into comprehensive consideration, the distance between each two adjacent annular discs 10 in the plurality of annular discs 10 is set to gradually increase from one side away from the driving disc 30 to the other side. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar fan 100 is 175 mm, the inner diameter of the annular disk 10 is 115 mm, the number of the annular disks 10 is 8, the thickness of the annular disk 10 is 2 mm, and the rotation speed of the laminar flow 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 100, the spacing between two adjacent annular disks 10 among the 8 annular disks 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 from one side away from the driving disk 30 to the other side, that is, the spacing between two adjacent annular disks 10 increases by 1 mm from one side away from the driving disk 30 to the other side. It should be noted that the distance between two adjacent annular disks 10 among the multiple annular disks 10 gradually increases from one side away from the driving disk 30 to the other side, which actually means that the distance between two adjacent annular disks 10 gradually increases along the direction of airflow in the air inlet channel 11.

[0076] Figure 19 is a partial cross-sectional view of a laminar flow fan 100 with a plurality of annular disks 10 having gradually changing inner diameters. Figure 20 yes Figure 19Schematic diagram of the relationship between the gradual change in the inner diameter of multiple annular discs 10 of the middle laminar flow fan 100 and the air volume and air pressure. As the inner diameter of multiple annular discs 10 gradually decreases from the side far away from the driving disc 30 to the other side, the air volume of the laminar flow fan 100 will be effectively improved, so that the air output of the laminar flow fan 100 meets the user's usage requirements. In a preferred embodiment, the change amount of the inner diameter between two adjacent annular discs 10 is the same, that is to say, the shrinking values of the inner diameters of multiple annular discs 10 from the side far away from the driving disc 30 to the other side are the same.

[0077] Figure 20 The horizontal axis shrinking uniform expanding Inner radius increase refers to the change amount of the inner diameter of each annular disc 10 and the inner diameter of the adjacent annular disc 10 below. The left vertical axis Massflow rate refers to the air volume, and the right vertical axis Pressure rise refers to the air pressure. Specifically,

[0078] Figure 20 It shows a schematic diagram of the relationship between the gradual change in the inner diameter of multiple annular discs 10 and the air volume and air pressure when the outer diameter, spacing, quantity, thickness of the annular discs 10 of the laminar flow fan 100 and the rotation speed of the laminar flow motor 20 remain unchanged. As Figure 20 shown, when the above-mentioned parameters remain unchanged, the gradual change in the inner diameter of multiple annular discs 10 from the side far away from the driving disc 30 to the other side has a greater impact on the air volume and a very small impact on the air pressure. When the change amount of the inner diameter of each annular disc 10 represented by the horizontal axis and the inner diameter of the adjacent annular disc 10 below is a positive number, it means that the inner diameters of multiple annular discs 10 gradually increase from the side far away from the driving disc 30 to the other side; when the change amount of the inner diameter of each annular disc 10 represented by the horizontal axis and the inner diameter of the adjacent annular disc 10 below is a negative number, it means that the inner diameters of multiple annular discs 10 gradually decrease from the side far away from the driving disc 30 to the other side.

[0079] It can be seen from Figure 20 that when the inner diameters of multiple annular discs 10 gradually decrease from the side far away from the driving disc 30 to the other side, the air volume of the laminar flow fan 100 increases slightly and the air pressure decreases slightly; when the inner diameters of multiple annular discs 10 gradually increase from the side far away from the driving disc 30 to the other side, the air pressure of the laminar flow fan 100 increases slightly and the air volume decreases significantly. Therefore, considering the air volume and air pressure of the laminar flow fan 100 comprehensively, the inner diameters of multiple annular discs 10 are set to gradually decrease from the side far away from the driving disc 30 to the other side.

[0080] In a preferred embodiment, the outer diameter of the annular disc 10 of the laminar flow fan 100 is 175 mm, the spacing between the annular discs 10 is 13.75 mm, the number of the annular discs 10 is 8, the thickness of the annular disc 10 is 2 mm, and the rotational speed of the laminar flow motor 20 is 1000 rpm (revolutions per minute). Considering comprehensively the air volume and air pressure of the laminar flow fan 100, the variation of the inner diameter of each annular disc 10 from the inner diameter of the adjacent annular disc 10 below can be set to -5 mm. That is, the inner diameters of the 8 annular discs 10 can be sequentially set from the side far away from the driving disc 30 to the other side as: 115 mm, 110 mm, 105 mm, 100 mm, 95 mm, 90 mm, 85 mm, 80 mm. The inner diameter of each annular disc 10 is 5 mm smaller than the inner diameter of the adjacent annular disc 10 below. It should be noted that the spacing between the annular discs 10 in the above text specifically refers to the spacing between two adjacent annular discs 10. Moreover, it should be emphasized that the inner diameters of the multiple annular discs 10 gradually decrease from the side far away from the driving disc 30 to the other side, which actually means that along the direction of the air flow in the air inlet channel 11, the inner diameters of the multiple annular discs 10 gradually decrease.

[0081] Figure 21 It is a schematic diagram of the central angle of the connection lines of the inner and outer diameters of multiple annular discs 10 of the laminar flow fan 100 with the annular disc 10 being an arc-shaped disc on the same longitudinal section passing through the central axis. Figure 22 is Figure 21 a schematic diagram of the relationship between the central angle and the air volume and air pressure in Figure 21 Each annular disc 10 of the laminar flow fan 100 in

[0082] Figure 22 is an arc-shaped disc that gradually approaches the driving disc 30 from the center to the edge and bulges toward the driving disc 30. Compared with a flat disc, the arc-shaped disc can make the angle of the external air entering the laminar flow fan 100 more in line with the fluid flow, thus being more conducive to the external air entering the laminar flow fan 100 and effectively reducing the air volume loss. In addition, the inner diameters of the multiple annular discs 10 gradually decrease from the side far away from the driving disc 30 to the other side, and the connection lines of the inner and outer diameters of the multiple annular discs 10 on the same longitudinal section passing through the central axis form a central angle θ.

[0082] Figure 22 In Figure 22 the horizontal axis θ refers to the central angle of the connection lines of the inner and outer diameters of the multiple annular discs 10 on the same longitudinal section passing through the central axis, the left vertical axis Mass flow rate refers to the air volume, and the right vertical axis Pressure rise refers to the air pressure. Specifically, Figure 22 shows a schematic diagram of the relationship between the central angle θ and the air volume and air pressure when the outer diameter, number of layers, spacing, thickness of the annular disc 10 of the laminar flow fan 100, and the rotational speed of the laminar flow motor 20 remain unchanged. As Figure 22As shown, when all the above-mentioned parameters remain unchanged, as the central angle θ gradually increases, the air volume of the laminar flow fan 100 first increases and then decreases, while the air pressure slightly rises. In a preferred embodiment, the outer diameter of the annular disc 10 of the laminar flow fan 100 is 175 mm, the number of layers of the annular disc 10 is 10, the spacing between the annular discs 10 is 13.75 mm, the thickness of the annular disc 10 is 2 mm, and the rotational speed of the laminar flow motor 20 is 1000 rpm (revolutions per minute). Considering the comprehensive air volume and air pressure, the central angle θ of the inner and outer diameter connection lines of the multiple annular discs 10 on the same longitudinal section passing through the central axis can be set to 9° to 30°. And as Figure 22 shown, when the central angle θ is set to 15°, the air volume of the laminar flow fan 100 reaches the maximum value.

[0083] The indoor unit 300 of the vertical air conditioner in this embodiment includes: a housing 310, which defines a cavity inside, and the housing is provided with an air inlet 330 and an air outlet 320; an evaporator 381, which is arranged inside the cavity corresponding to the air inlet 330 and is configured to exchange heat for the air entering the cavity through the air inlet 330; a laminar flow fan 110, which is arranged inside the cavity and is configured to form a laminar flow of air by using the viscous effect and blow the laminar flow of air out from the air outlet 320; and a double-suction centrifugal fan 610, which is arranged inside the cavity and is configured to send the air that has exchanged heat through the evaporator 381 to the laminar flow fan 110. The indoor unit 300 of the vertical air conditioner is provided with a laminar flow fan 110, which realizes laminar flow air supply through the viscous effect, has low noise and high air volume during the air supply process, and effectively improves the user experience; it is also provided with a double-suction centrifugal fan 610, which can effectively increase the air volume entering the laminar flow fan 110, and thus improve the working efficiency of the laminar flow fan 110.

[0084] Furthermore, the indoor unit 300 of the vertical air conditioner according to this embodiment further includes: a volute 520, inside which a first accommodation chamber 523 and a second accommodation chamber 524 are defined. The first accommodation chamber 523 and the second accommodation chamber 524 are communicated through a communication channel 525. And a double-suction centrifugal fan 610 is disposed in the first accommodation chamber 523, and a laminar flow fan 110 is disposed in the second accommodation chamber 524. The volute 520 has two inlets 522 and one outlet 521, and the outlet 521 is disposed opposite to the air outlet 320. The double-suction centrifugal fan 610 drives the air that has exchanged heat through the evaporator 381 to enter the first accommodation chamber 523 from the two inlets 522, turns and then enters the laminar flow fan 110 in the second accommodation chamber 524 through the communication channel 525, forming a laminar flow of air discharged from the outlet 521, and then blown out through the air outlet 320. There are two laminar flow fans 110, double-suction centrifugal fans 610 and volutes 520, and the housing 310 includes a front panel 311, a rear panel 315, a top panel 313 and a bottom panel 314. Among them, air outlets 320 are provided in the upper and lower parts of the front panel 311, and an air inlet 330 is provided in the upper middle part of the rear panel 315. The two sets of double-suction centrifugal fans 610 and laminar flow fans 110 in the upper and lower parts can enable both the air volume and the air supply comfort of the indoor unit 300 of the vertical air conditioner to meet the needs of users.

[0085] Furthermore, in the indoor unit 300 of the vertical air conditioner according to this embodiment, the multiple annular disks 10 of the laminar flow fan 100 can be arranged in one or several of the following structures: the inner diameters of the multiple annular disks 10 gradually decrease from the side far away from the driving disk 30 to the other side; the distance between two adjacent annular disks 10 among the multiple annular disks 10 gradually increases from the side far away from the driving disk 30 to the other side; each annular disk 10 is an arc-shaped disk that gradually approaches the driving disk 30 from the center to the edge and bulges toward the driving disk 30. The above forms of arranging the multiple annular disks 10 can effectively increase the air volume of the laminar flow fan 100, so that the air supply of the laminar flow fan 100 meets the usage requirements of users. In addition, the connecting member can be a connecting piece 40. The cross-section of the connecting piece 40 has two curves arranged in sequence along the rotation direction of the annular disk 10. The chord lengths of the two curves are linearly related to the air volume generated by the laminar flow fan 100. The setting of the connecting piece 40 can effectively increase the air pressure of the laminar flow fan 100, so that after the laminar flow of air is blown out through the gaps between the multiple annular disks 10, due to the pressure difference, the air outside the laminar flow fan 100 is pressed into the annular disk 10 through the air inlet channel 11, and so on in a cycle, thereby forming a laminar air circulation. The multiple air outlets 12 formed by the gaps between the multiple annular disks 10 can enable the laminar flow fan 100 to realize 360° air supply, avoiding various discomfort symptoms caused by the direct blowing of the air conditioner to the user, and further improving the user experience.

[0086] Those skilled in the art should understand that, without special instructions, the terms such as "upper", "lower", "left", "right", "front", and "back" used to represent the orientation or positional relationship in the embodiments of the present invention are based on the actual use state of the indoor unit 300 of the vertical air conditioner. These terms are only for the convenience of describing and understanding the technical solution of the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0087] Up to this point, those skilled in the art should recognize that although many 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 from 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 determined to cover all these other variations or modifications.

Claims

1. A vertical air conditioner indoor unit, comprising: a housing, which defines a cavity inside, and an air inlet and an air outlet are formed on the housing; an evaporator, disposed inside the cavity corresponding to the air inlet, configured to exchange heat with the air entering the cavity through the air inlet; a laminar flow fan, disposed inside the cavity, configured to form a laminar flow of air by using the viscous effect and blow the laminar flow of air out from the air outlet; and a double-suction centrifugal fan, disposed inside the cavity, configured to send the air that has exchanged heat through the evaporator to the laminar flow fan, wherein the laminar flow fan includes: a laminar flow fan blade, including: a plurality of annular disks, arranged in parallel at intervals and having the same central axis; a driving disk, arranged in parallel at intervals on one side of the plurality of annular disks; and a connecting member, passing through the driving disk and the plurality of annular disks to connect the plurality of annular disks to the driving disk; the connecting member is a connecting piece, and the cross-section of the connecting piece has two curves arranged in sequence along the rotation direction of the annular disk, and the chord length of the two curves has a linear relationship with the air volume generated by the laminar flow fan; the inner diameters of the plurality of annular disks gradually decrease from the side far away from the driving disk to the other side.

2. The vertical air conditioner indoor unit according to claim 1, further comprising: a volute, which defines a first accommodation cavity and a second accommodation cavity inside, and the first accommodation cavity and the second accommodation cavity are communicated through a communication channel; and the double-suction centrifugal fan is disposed in the first accommodation cavity, and the laminar flow fan is disposed in the second accommodation cavity.

3. The vertical air conditioner indoor unit according to claim 2, wherein, the volute has two inlets and one outlet, and the outlet is disposed opposite to the air outlet; the double-suction centrifugal fan drives the air that has exchanged heat through the evaporator to enter the first accommodation cavity from the two inlets, turns and then enters the laminar flow fan in the second accommodation cavity through the communication channel, forms the laminar flow of air to be discharged from the outlet, and then is blown out through the air outlet.

4. The vertical air conditioner indoor unit according to claim 2, wherein, there are two laminar flow fans, two double-suction centrifugal fans and two volutes, and the housing includes a front panel, a rear panel, a top panel and a bottom panel, wherein the upper part and the lower part of the front panel are provided with the air outlets, and the upper middle part of the rear panel is provided with the air inlet.

5. The vertical air conditioner indoor unit according to claim 1, wherein, a common air inlet channel is formed at the centers of the plurality of annular disks, and the air in the cavity enters the gap between the plurality of annular disks through the air inlet channel; the laminar flow fan further includes: a laminar flow motor, connected to the laminar flow fan blade, and configured to drive the plurality of annular disks to rotate, so that the air boundary layer near the surfaces of the plurality of annular disks rotates and moves from the inside to the outside, thereby forming a laminar flow of air to be blown out from the air outlet.

6. The vertical air conditioner indoor unit according to claim 5, wherein, The laminar flow motor is further configured to directly drive the driving disc to rotate, and then drive the plurality of annular discs to rotate by the driving disc.

7. The indoor unit of the vertical air conditioner according to claim 6, wherein, a groove is formed in the center of the driving disc facing the plurality of annular discs, the laminar flow motor is fixedly arranged in the groove, and a cylindrical convex part is arranged on one side of the driving disc facing the plurality of annular discs to guide the air flow entering the laminar flow fan and assist in forming the laminar flow wind; or the surface of the driving disc facing the laminar flow motor is a flat surface, and the surface of the driving disc facing the plurality of annular discs has a conical convex part to guide the air flow entering the laminar flow fan and assist in forming the laminar flow wind.

8. The indoor unit of the vertical air conditioner according to claim 1, wherein, the cross section of the connecting piece has double arcs arranged in sequence along the rotation direction of the annular disc: an inner arc and a back arc, and both the inner arc and the back arc protrude towards the rotation direction of the annular disc, the inner arc and the back arc have the same center of a circle and are arranged in parallel or have different centers of a circle and intersect at both ends.

9. The indoor unit of the vertical air conditioner according to claim 1, wherein, the plurality of annular discs are arranged in one or more of the following structures: the distance between two adjacent annular discs among the plurality of annular discs gradually increases from the side far away from the driving disc to the other side; each annular disc is an arc-shaped disc that gradually approaches the driving disc from the center to the edge and protrudes towards the driving disc.

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