CN111442395B

CN111442395B - Indoor machine of floor air conditioner

Info

Publication number: CN111442395B
Application number: CN201910045353.6A
Authority: CN
Inventors: 李英舒; 吴丽琴; 吕静静; 古康; 王永涛
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd; Chongqing Haier Air Conditioner Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd; Chongqing Haier Air Conditioner Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2021-08-24
Anticipated expiration: 2039-01-17
Also published as: CN111442395A

Abstract

The invention provides an indoor unit of a floor air conditioner. Wherein the floor air conditioner indoor unit includes: the air conditioner comprises a shell, a fan and a fan, wherein a cavity is defined in the shell, air outlets are formed in the upper part and the lower part of the shell, and an air inlet is formed in the middle of the shell; the evaporator is arranged in the cavity corresponding to the air inlet and is configured to exchange heat for air entering the cavity through the air inlet, and the evaporator is flat and parallel to the front panel; the laminar flow fan is arranged above the evaporator and is configured to enable part of air subjected to heat exchange of the evaporator to form laminar flow air by utilizing a viscosity effect, and the laminar flow air is blown out from an air outlet at the upper part; and the single-suction centrifugal fan is axially vertical to the front panel and is configured to drive part of air subjected to heat exchange through the evaporator to be blown out from an air outlet at the lower part. According to the indoor unit of the vertical air conditioner, the evaporator and the air inlet are arranged in a matching manner, so that sufficient heat exchange is ensured; the laminar flow fan realizes the upper laminar flow air supply, and the noise is low in the air supply process; the single-suction centrifugal fan can effectively improve the air output and the air pressure of the lower part.

Description

Indoor machine of floor air conditioner

Technical Field

The invention relates to the technical field of household appliances, in particular to an indoor unit of a vertical air conditioner.

Background

With the development of society and the increasing living standard of people, various air conditioning devices have become one of the indispensable electrical devices in people's daily life. Various air conditioning devices can help people to reach a temperature that can be adapted to when the ambient temperature is too high or too low.

The current air conditioning devices mainly include various types of air conditioners and fans, but most users consider that hot air or cold air generated by the current air conditioners is unevenly distributed in a room or a closed space, and has certain distribution limitations. In addition, the fan used in the indoor unit of the air conditioner is mainly a cross flow fan. However, although the cross flow fan has low noise, the wind pressure is too small, and the air supply distance is short. And the whole volume of the cross flow fan is large, and the actual effective volume is small, so that the space waste is caused.

Disclosure of Invention

The invention aims to provide a vertical air conditioner indoor unit with low noise, high air volume and high air pressure.

The invention further aims to realize 360-degree air supply of the indoor unit of the floor air conditioner, avoid air-out direct blowing users and improve the use experience of the users.

In particular, the present invention provides a floor air conditioner indoor unit, comprising: the air conditioner comprises a shell, a front panel, a rear shell, a top plate and a bottom plate, wherein a cavity is defined in the shell, air outlets are formed in the upper part and the lower part of the shell, an air inlet is formed in the middle of the shell, and the shell comprises the front panel, the rear shell, the top plate and the bottom plate; the evaporator is arranged in the cavity corresponding to the air inlet and is configured to exchange heat for air entering the cavity through the air inlet, wherein the evaporator is flat and parallel to the front panel; the laminar flow fan is arranged above the evaporator and is configured to enable part of air subjected to heat exchange of the evaporator to form laminar flow air by utilizing a viscosity effect and enable the laminar flow air to be blown out from an air outlet at the upper part; and the single-suction centrifugal fan is arranged below the laminar flow fan, is axially vertical to the front panel and is configured to drive part of air subjected to heat exchange by the evaporator to be blown out from an air outlet at the lower part.

Optionally, the rear shell includes a rear panel and two side panels, and the air inlet is disposed on the rear panel to realize single-sided air inlet.

Optionally, the indoor unit of the floor air conditioner further comprises: and a partition plate disposed between the evaporator and the front panel to prevent air heat-exchanged through the evaporator from flowing to the front of the cavity.

Optionally, the indoor unit of the floor air conditioner further comprises: the volute is provided with an inlet and an outlet, and the outlet is opposite to the air outlet at the lower part; the single-suction centrifugal fan is arranged inside the volute and is also configured to: and part of air subjected to heat exchange of the evaporator is driven to enter the volute from the inlet, is deflected twice in the volute and then is discharged from the outlet, and then is blown out through the air outlet at the lower part.

Optionally, the laminar flow fan comprises: laminar flow fan sets up inside the cavity of the air outlet that corresponds the upper portion, and laminar flow fan includes: the annular disks are arranged in parallel at intervals and have the same central axis, the centers of the annular disks form an air inlet channel together, and air in the cavity enters gaps among the annular disks through the air inlet channel; and the laminar flow motor is connected with the laminar flow fan and is configured to drive the plurality of annular discs to rotate so as to enable the air boundary layer close to the surfaces of the plurality of annular discs to rotate and move from inside to outside, so that laminar flow wind is formed and blown out from the air outlet.

Optionally, the laminar flow fan further comprises: the driving discs are arranged on one side of the plurality of annular discs in parallel at intervals; and a connector extending through the drive disk and the plurality of annular disks to connect the plurality of annular disks to the drive disk, the laminar flow motor further configured to: the driving disc is directly driven to rotate, and the driving disc drives the annular discs to rotate.

Optionally, the indoor unit of the floor air conditioner further comprises: the fixing plate is provided with a plurality of reinforcing ribs on one side and a plurality of clamping grooves on the other side; and the fixing frame is provided with a plurality of clamping jaws corresponding to the clamping grooves on one side facing the fixing plate, so that the laminar flow motor is fixed between the fixing frame and the fixing plate after the clamping jaws are respectively screwed with the clamping grooves, a through hole is formed in the center of the fixing frame, and an output shaft of the laminar flow motor penetrates through the through hole and then is fixed with the driving disc.

Optionally, the indoor unit of the floor air conditioner further comprises: and the air inducing ring is arranged on one side of the plurality of annular discs far away from the driving disc and is configured to guide part of air subjected to heat exchange through the evaporator to enter the air inlet channel.

Optionally, the shell is provided with an air outlet at the upper part thereof and surrounds the laminar flow fan for one circle; or the vertical air conditioner indoor unit also comprises: the wind shielding piece is arranged outside the laminar flow fan and provided with a notch; the shell is provided with an air outlet at the position corresponding to the notch.

Optionally, a groove is formed in the center of the driving disc towards the plurality of annular discs, and the laminar flow motor is fixedly arranged in the groove; or the surface of the driving disc facing the laminar flow motor is a plane, and the surface facing the plurality of annular discs is provided with a conical bulge part so as to guide the air flow entering the laminar flow fan and assist the formation of laminar flow wind.

Optionally, the connecting piece is a connecting piece, the cross section of the connecting piece is provided with two sections of curves which are sequentially arranged along the rotating direction of the annular disc, and the chord length of the two sections of curves is in a linear relation with the air quantity generated by the laminar flow fan.

Optionally, the cross section of the connecting piece has double circular arcs arranged in sequence along the direction of rotation of the annular disk: the inner arc and the back arc are both raised towards the rotating direction of the annular disk, and have the same circle center and are arranged in parallel or have different circle centers and are intersected at two ends.

Optionally, the plurality of annular disks are arranged according to one or more of the following structures: the inner diameters of the annular disks are gradually reduced from one side far away from the driving disk to the other side; the distance between two adjacent annular disks in the plurality of annular disks is gradually increased from one side far away from the driving disk to the other side; each annular disc is an arc disc which is gradually close to the driving disc from the center to the edge and protrudes towards one side of the driving disc.

The invention relates to a floor air conditioner indoor machine, comprising: the air conditioner comprises a shell, a front panel, a rear shell, a top plate and a bottom plate, wherein a cavity is defined in the shell, air outlets are formed in the upper part and the lower part of the shell, an air inlet is formed in the middle of the shell, and the shell comprises the front panel, the rear shell, the top plate and the bottom plate; the evaporator is arranged in the cavity corresponding to the air inlet and is configured to exchange heat for air entering the cavity through the air inlet, wherein the evaporator is flat and parallel to the front panel; the laminar flow fan is arranged above the evaporator and is configured to enable part of air subjected to heat exchange of the evaporator to form laminar flow air by utilizing a viscosity effect and enable the laminar flow air to be blown out from an air outlet at the upper part; and the single-suction centrifugal fan is arranged below the laminar flow fan, is axially vertical to the front panel and is configured to drive part of air subjected to heat exchange by the evaporator to be blown out from an air outlet at the lower part. The indoor unit of the vertical air conditioner is provided with the laminar flow fan, so that the laminar flow air supply at the upper part is realized through the viscous effect, the noise is low and the air quantity is high in the air supply process, and the use experience of a user is effectively improved; and a single-suction centrifugal fan is also arranged, so that the air output and air pressure of the lower part can be effectively improved.

Furthermore, the shell of the indoor unit of the floor air conditioner is provided with an air outlet at the upper part thereof, wherein the air outlet surrounds the laminar flow fan; or the vertical air conditioner indoor unit also comprises: the wind shielding piece is arranged outside the laminar flow fan and provided with a notch; the shell is provided with an air outlet at the position corresponding to the notch, and the 360-degree four-side air supply or three-side air supply, two-side air supply and single-side air supply at the upper part of the indoor unit of the vertical air conditioner can be realized. The rear shell includes: the air inlet is arranged on the rear panel to realize single-side air inlet. The flat-plate-shaped evaporator is matched with the air inlet, so that air entering the cavity through the air inlet can exchange heat through the evaporator. The flat plate evaporator can also effectively reduce the occupied volume in the cavity. The laminar flow fan comprises a laminar flow fan and a laminar flow motor, and the laminar flow fan is arranged in a cavity of the air outlet corresponding to the upper part. The laminar flow motor is fixed in between mount and the fixed plate, and wherein the perforation has been seted up at the mount center, and the output shaft of laminar flow motor passes behind the perforation fixed with laminar flow fan's drive disc, can effectively strengthen laminar flow fan and laminar flow motor's firm in connection degree, promotes whole operational reliability.

Furthermore, in the indoor unit of the floor air conditioner, the plurality of annular disks of the laminar flow fan can be arranged according to one or more of the following structures: the inner diameters of the annular disks are gradually reduced from one side far away from the driving disk to the other side; the distance between two adjacent annular disks in the plurality of annular disks is gradually increased from one side far away from the driving disk to the other side; each annular disc is an arc disc which is gradually close to the driving disc from the center to the edge and protrudes towards one side of the driving disc. The above-mentioned form that sets up a plurality of annular disks all can effectively promote laminar flow fan's amount of wind for laminar flow fan's air-out satisfies user's user demand. In addition, the connecting piece can be a connecting piece, the cross section of the connecting piece is provided with two sections of curves which are sequentially arranged along the rotating direction of the annular disc, and the chord length of the two sections of curves is in a linear relation with the air quantity generated by the laminar flow fan. The setting of connection piece can effectively promote laminar flow fan's wind pressure for after laminar flow wind blows off through the clearance between a plurality of annular disc, owing to receive the pressure differential effect, laminar flow fan outside air is impressed the annular disc through inlet air channel, and the circulation is reciprocal like this, thereby forms laminar flow air cycle. A plurality of air outlets formed by the gaps among the plurality of annular discs can enable the laminar flow fan to realize 360-degree air supply, various uncomfortable symptoms caused by direct blowing of air supply by the air conditioner are avoided for users, and the use experience of the users is further improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic view showing the overall structure of an indoor unit of a floor type air conditioner according to an embodiment of the present invention;

fig. 2 is a partial schematic view of the indoor unit of the floor standing air conditioner of fig. 1;

fig. 3 is an exploded view of the components of the indoor unit of the neutral air conditioner of fig. 1;

fig. 4 is a schematic view illustrating air circulation of a laminar flow fan in an indoor unit of a floor air conditioner according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating the blowing principle of the laminar flow fan in the indoor unit of the floor air conditioner according to one embodiment of the present invention;

fig. 6 is a graph illustrating the speed and force profiles of a laminar flow fan in an indoor unit of a floor air conditioner, according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a laminar flow fan with a drive disk having a groove;

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

FIG. 9 is a schematic view of the laminar flow fan of FIG. 7 from a further perspective;

FIG. 10 is a cross-sectional view of the laminar flow fan of FIG. 7;

FIG. 11 is a schematic view of the laminar flow fan of FIG. 7 coupled to a laminar flow motor;

FIG. 12 is an exploded view of the components of the laminar flow motor, stationary plate and mounting bracket;

FIG. 13 is a schematic view of the connection of a laminar flow fan with a drive disk having a conical projection to a laminar flow motor;

FIG. 14 is a schematic view of the laminar flow fan of FIG. 13 from another perspective;

FIG. 15 is a cross-sectional schematic view of the laminar flow fan of FIG. 13;

FIG. 16 is a schematic diagram showing the relationship between the length of the string line of the connecting piece in FIG. 15 and the wind quantity and pressure;

FIG. 17 is a schematic view showing the relationship between the installation angle of the connecting piece of FIG. 15 and the air volume and the air pressure;

FIG. 18 is a cross-sectional schematic view of a laminar flow fan having aero blades;

FIG. 19 is a schematic view of the aero blade installation angle of the laminar flow fan of FIG. 18 in relation to air flow and wind pressure;

FIG. 20 is a schematic view of a laminar flow fan with gradually changing spacing between a plurality of annular disks and a laminar flow motor;

FIG. 21 is a schematic view of the laminar flow fan of FIG. 20 coupled to a laminar flow motor from another perspective;

FIG. 22 is a schematic diagram of the gradual change of the pitch of the plurality of annular disks of the laminar flow fan of FIG. 20 as a function of the air volume and the air pressure;

FIG. 23 is a partial cross-sectional view of a laminar flow fan with a gradual change in the inner diameter of a plurality of annular disks;

FIG. 24 is a schematic diagram of the inner diameter gradient of the multiple annular disks of the laminar flow fan of FIG. 23 in relation to air flow and air pressure;

FIG. 25 is a schematic view of a central angle of a connecting line of an inner diameter and an outer diameter of a plurality of annular disks of a laminar flow fan in which the annular disks are arc-shaped disks on the same longitudinal section passing through the central axis; and

fig. 26 is a schematic diagram showing the relationship between the central angle and the air volume and the wind pressure in fig. 25.

Detailed Description

The embodiment provides a floor air conditioner indoor unit which is provided with a laminar flow fan, realizes upper laminar flow air supply through a viscous effect, has low noise, high air volume and high air pressure in the air supply process, and effectively improves the use experience of users; and a single-suction centrifugal fan is also arranged, so that the air output and air pressure of the lower part can be effectively improved. Fig. 1 is a schematic view illustrating an overall structure of a floor type air conditioner indoor unit 300 according to an embodiment of the present invention, fig. 2 is a partial structure of the floor type air conditioner indoor unit 300 of fig. 1, and fig. 3 is an exploded view illustrating components of the floor type air conditioner indoor unit 300 of fig. 1. Fig. 4 is a schematic air circulation diagram of the laminar flow fan 100 in the floor air conditioner 300 according to an embodiment of the present invention, fig. 5 is a schematic air supply principle diagram of the laminar flow fan 100 in the floor air conditioner 300 according to an embodiment of the present invention, and fig. 6 is a velocity distribution and force distribution diagram of the laminar flow fan 100 in the floor air conditioner 300 according to an embodiment of the present invention. Fig. 7 is a structural view of a laminar flow fan 100 having grooves 32 in a driving disk 30, fig. 8 is a structural view of the laminar flow fan 100 in fig. 7 from another view, fig. 9 is a structural view of the laminar flow fan 100 in fig. 7 from another view, and fig. 10 is a sectional view of the laminar flow fan 100 in fig. 7. As shown in fig. 1 to 6, the floor air conditioner indoor unit 300 may generally include: a housing 310, an evaporator 382, a laminar flow fan 110, and a single suction centrifugal fan 510.

Wherein, the inside of the housing 310 defines a cavity, and the upper and lower parts of the housing 310 are provided with an air outlet 320 and an air inlet 330. The housing 310 may include: a front panel 311, a rear case 312, a top panel 313 and a bottom panel 314. In a specific embodiment, the rear casing 312 includes a rear panel 315 and two side panels 316, and the air inlet 330 may be disposed on the rear panel 315 to realize single-sided air inlet. The intake vent 330 of the housing 310 may be provided in the form of an intake grill, which can draw indoor air into the cavity through different directions and filter the air. An air guiding plate 321 may be disposed at the air outlet 320 of the housing 310 to adjust the air outlet direction of the indoor unit 300 of the vertical air conditioner.

The evaporator 382 may be disposed inside the cavity corresponding to the intake vent 330 and configured to exchange heat with air entering the cavity through the intake vent 330. The evaporator 382 of the present embodiment is flat and parallel to the front panel 311. It should be noted that the evaporator 382 is closer to the back panel 315 to ensure that the air entering the cavity from the air inlet 330 on the back panel 315 can first exchange heat through the evaporator 382. The floor air conditioner indoor unit 300 may further include: and a partition 383 disposed between the evaporator 382 and the front panel 311 to prevent air heat-exchanged through the evaporator 382 from flowing to the front of the cavity. The partition 383 of this embodiment may be U-shaped with the U opening toward the evaporator 382. A drip pan 390 may also be provided below the evaporator 382 to receive condensed water generated by the evaporator 382.

The laminar flow fan 110 is disposed above the evaporator 382, and is configured to generate laminar flow air from a part of the air heat-exchanged by the evaporator 382 by using a viscous effect, and to blow out the laminar flow air from the air outlet 320 at the upper portion. The laminar flow fan 110 includes a laminar flow fan 100 and a laminar flow motor 20. Wherein laminar flow fan 100 sets up inside the cavity of the air outlet 320 that corresponds the upper portion, laminar flow fan 100 includes: the annular disks 10 are arranged in parallel at intervals and have the same central axis, the centers of the annular disks 10 jointly form an air inlet channel 11, and air in the cavity enters gaps among the annular disks 10 through the air inlet channel 11. And the laminar flow motor 20 is connected with the laminar flow fan 100 and configured to drive the plurality of annular disks 10 to rotate, so that the air boundary layer 13 close to the surfaces of the plurality of annular disks 10 moves from inside to outside in a rotating manner, and laminar flow wind is formed and blown out from the air outlet 320.

The single suction centrifugal fan 510 may be disposed below the laminar flow fan 110, and has an axial direction perpendicular to the front panel 311 and configured to blow a portion of the air heat-exchanged by the evaporator 382 out of the lower air outlet 320. The floor air conditioner indoor unit 300 may further include: a scroll 520 having an inlet (not shown) and an outlet 521, the outlet 521 being disposed opposite to the lower outlet 320; a single suction centrifugal fan 510 is disposed inside the volute 520, and is further configured to: the air after heat exchange of the evaporator 382 is driven to enter the volute 520 from the inlet, and is discharged from the outlet 521 after being deflected twice in the volute 520, and then is blown out through the air outlet 320 at the lower part. Note that the inlet of the scroll 520 is disposed on the side toward the rear panel 315, and thus is not shown in the drawing. In summary, the single-suction centrifugal fan 510 is configured to axially intake air and radially exhaust air, and the air turns once from entering the single-suction centrifugal fan 510 axially to leaving the single-suction centrifugal fan 510 radially, and then turns once again after exiting the single-suction centrifugal fan through the outlet 521.

The shape of the drip tray 390 may match the shape of the volute 520, e.g., the lower portion of the volute 520 may pass through the drip tray 390. A shelf 530 can be arranged in the cavity, and the lower part of the volute 520 can be stably placed on the shelf 530 after passing through the water pan 390.

Specifically, the laminar flow motor 20 drives the plurality of annular disks to rotate, so that the plurality of annular disks contact with air between each other and move with each other, and the air boundary layer 13 close to the surfaces of the plurality of annular disks is driven by the plurality of rotating annular disks to rotate from inside to outside due to the viscous effect to form laminar flow wind. A plurality of air outlets 12 are formed in the gaps between the plurality of annular disks, each air outlet 12 can supply air for 360 degrees, and laminar air discharged from the air outlets 12 is blown out to the environment outside the indoor unit 300 of the floor air conditioner through the air outlet 320. The laminar flow fan can realize 360 air supply, but the air outlet 320 can be set according to actual conditions, and can realize four-side air supply, three-side air supply, two-side air supply or single-side air supply respectively.

For example, the housing 310 may be provided with an air outlet 320 at an upper portion thereof surrounding the laminar flow fan 100 for a circle, so as to realize four-sided air supply at the upper portion, that is, 360 ° air supply. Alternatively, the floor air conditioner indoor unit 300 may further include: a wind shielding member 371 disposed outside the laminar flow fan 100 and having a notch 373; the housing 310 is provided with an air outlet 320 at a position corresponding to the notch 373. The notch 373 is located outside the periphery of the laminar flow fan 100 so as to blow out the laminar flow wind generated by the laminar flow fan 100. According to the size of the gap 373 and the arrangement of the corresponding air outlet 320, three-side air supply, two-side air supply or three-side air supply at the upper part can be realized.

As shown in fig. 4, the laminar flow fan 100 may further include: a drive disk 30 and a link. Wherein the driving disks 30 are spaced apart and arranged in parallel on one side of the plurality of annular disks 10. And a connecting member penetrating the drive disk 30 and the plurality of annular disks 10 to connect the plurality of annular disks 10 to the drive disk 30. As shown in fig. 7, the connector may be a connecting tab 40. The laminar flow motor 20 may also be configured to: the driving disk 30 is directly driven to rotate, and the driving disk 30 drives the plurality of annular disks 10 to rotate. That is, the laminar flow motor 20 configured to rotate the plurality of annular discs 10 is dependent on the laminar flow motor 20 first rotating the driving disc 30, and then the driving disc 30 rotates the plurality of annular discs 10. In a specific embodiment, the radius of the drive disk 30 is the same as the outer diameter of the plurality of annular disks 10, and may be set in a certain range, for example, 170 mm to 180 mm, so as to constrain the occupied volume of the laminar flow fan 100 in the transverse direction, cooperatively define the number of annular disks 10 and the spacing between two adjacent annular disks 10, and constrain the thickness of the laminar flow fan 100 in the longitudinal direction, which may effectively constrain the entire occupied volume of the laminar flow fan 100. Note that, the inner diameter of the annular disk 10 refers to the radius of its inner circumference; the outer diameter refers to the radius of its outer circumference. The specific values of the outer diameter of the annular disk 10 are merely exemplary and are not intended to limit the present invention.

The indoor unit 300 of the floor air conditioner may further include a wind guide 360 disposed on a side of the plurality of annular discs 10 away from the driving disc 30. And, the air inducing ring 360 is configured to guide a portion of the air heat-exchanged through the evaporator into the air intake passage 11. Air entering the cavity through the air inlet 330 firstly exchanges heat through the evaporator, and a part of the air after heat exchange is guided to enter the air inlet channel 11 of the laminar flow fan 100 through the air guide ring 360; and a portion enters the volute 520 due to the single suction centrifugal fan 510 and is discharged from the outlet 521.

A specific embodiment of a floor air conditioner indoor unit 300 is described as follows:

as shown in fig. 1 to 3, the indoor unit 300 of the floor type air conditioner of the present embodiment is provided with a single vertically disposed evaporator 382, and the evaporator 382 has a flat plate shape and is parallel to the front panel 311. The air inlet 330 is disposed on the rear panel 315 of the rear casing 312, i.e., a single side of the air inlet. That is, the evaporator 382 is disposed corresponding to the intake vent 330, and the air entering the cavity from the intake vent 330 can exchange heat through the evaporator 382. A partition 383 is further disposed in front of the evaporator 382, so that the air after heat exchange can be prevented from flowing to the front of the cavity, the partition 383 in this embodiment is U-shaped, and the opening of the U-shaped is facing the evaporator 382. A part of the air after heat exchange enters the air inlet channel 11 of the laminar flow fan 100 through the guiding action of the air guiding ring 360 at the upper part, and then enters between a plurality of annular disks of the laminar flow fan 100. A part of the air after heat exchange enters the volute 520 from the inlet because of the single-suction centrifugal fan 510, and is discharged from the outlet 521 after being turned twice in the volute 520, and then is blown out through the air outlet 320 at the lower part. The wind shielding member 371 of the indoor unit 300 of the floor air conditioner of the present embodiment may be a flat plate, and the outer side of the periphery of the laminar flow fan 100, which is not shielded by the wind shielding member 371, is the gap 373. Since the wind shielding member 371 has the notches 373 at the front side and the left and right sides of the circumference of the laminar flow fan 100, the air outlets 320 are disposed at the upper portions of the front panel 311 and the two side panels 316 of the rear casing 312 of the indoor unit 300 of the floor air conditioner of this embodiment, and the laminar flow wind formed by the laminar flow fan 100 is blown out from the air outlet 320 at the upper portion, so that the air supply from three sides at the upper portion can be realized. In addition, the lower part of the front panel 311 is provided with an air outlet 320, so that single-sided air supply at the lower part can be realized.

In other embodiments, the wind shielding member 371 may be a shell, which is wrapped outside the laminar flow fan 100, and the notch 373 is only disposed on the front side of the periphery of the laminar flow fan 100, so that the indoor unit 300 of the floor air conditioner may only have the air outlet 320 on the upper portion of the front panel 311, thereby realizing single-sided air supply on the upper portion. However, regardless of the shape of the wind shielding member 371, the notch 373 corresponds to the wind outlet 320. For example, the wind shielding member 371 can discharge laminar air formed by the laminar fan 100 on three sides, and three air outlets 320 are correspondingly arranged on the position; the wind shielding member 371 can discharge the laminar air formed by the laminar fan 100 on one side, and one wind outlet 320 is correspondingly arranged at the position. The wind shielding member 371 can ensure that the laminar flow wind formed by the laminar flow fan 100 is not blown to other places in the cavity except the wind outlet 320, and the normal operation of other components in the cavity is not influenced.

As shown in fig. 4, the centers of the plurality of annular disks 10 are collectively formed with an air inlet passage 11 for allowing air outside the laminar flow fan 100 to enter. A plurality of air discharge ports 12 are formed at gaps between the plurality of annular disks 10 to allow laminar air to be blown out. The process of laminar wind formed by the inward and outward rotating movement of the air boundary layer 13 is centrifugal movement, so that the speed of the air leaving the air outlet 12 is higher than that of the air entering the air inlet channel 11. The pressure difference between the air outlet 12 of the laminar flow fan 100 and the inlet of the air inlet channel 11 is wind pressure. The plurality of air outlets 12 formed by the gaps between the plurality of annular disks 10 can enable the laminar flow fan 100 to uniformly supply air at 360 degrees, thereby avoiding various uncomfortable symptoms caused by direct blowing of air by the indoor unit 300 of the floor air conditioner, and further improving the use experience of the user.

The blowing principle of the laminar flow fan 100 is derived primarily from the "tesla turbine" found in nigula tesla. Tesla turbines mainly utilize the 'laminar boundary layer effect' or 'viscous effect' of the fluid to achieve the purpose of doing work on 'turbine disks'. In the laminar flow fan 100 of this embodiment, the laminar flow motor 20 drives the driving disk 30, the driving disk 30 drives the plurality of annular disks 10 to rotate at a high speed, and the air in the intervals of the annular disks 10 contacts and moves with each other, so that the air boundary layer 13 near the surfaces of the annular disks 10 is driven by the rotating annular disks 10 to rotate from inside to outside due to the action of the viscous shear force τ, thereby forming laminar flow wind.

Fig. 6 shows a schematic diagram of the viscous shear force distribution τ (y) and velocity distribution u (y) to which the air boundary layer 13 is subjected. The viscous shear force experienced by the air boundary layer 13 is actually the resistance that each annular disk 10 generates to the air boundary layer 13. The axis of abscissa in fig. 6 refers to the distance in the moving direction of the air boundary layer 13, and the axis of ordinate refers to the height of the air boundary layer 13 in the direction perpendicular to the moving direction. v. of_eThe air flow velocity at each point in the air boundary layer 13, δ being the thickness of the air boundary layer 13, τ_wIs a 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 boundary layer 13 in the direction perpendicular to the direction of movement, and L is the distance between a point on the inner circumference of the annular disk 10 and a point on the surface of the annular disk 10.τ (y) is the distribution of viscous shear forces experienced at this distance L at a cross-sectional height y of the boundary layer 13 of air; u (y) is the velocity profile at this distance L for a cross-section of the air boundary layer 13 having a height y.

The laminar flow fan 100 shown in fig. 7 to 10 has a groove 32 formed toward the plurality of annular disks 10 at the center of the driving disk 30, and the laminar flow motor 20 is fixedly disposed in the groove 32. Fig. 11 is a schematic view of the connection between the laminar flow fan 100 and the laminar flow motor 20 in fig. 7, and fig. 12 is an exploded view of the laminar flow motor 20, the fixing plate 340, and the fixing bracket 350. As shown in fig. 11 and 12, the indoor unit 300 of the floor air conditioner may further include: a fixing plate 340 and a fixing frame 350. Wherein, one side of the fixing plate 340 is provided with a plurality of reinforcing ribs 341, and the other side is provided with a plurality of clamping grooves 342. The reinforcing ribs 341 can effectively improve the firmness of the fixing plate 340. The fixing frame 350 is provided with a plurality of clamping jaws 351 corresponding to the plurality of clamping slots 342 on one side facing the fixing plate 340, so that the laminar flow motor 20 is fixed between the fixing frame 350 and the fixing plate 340 after the plurality of clamping jaws 351 are respectively screwed in the plurality of clamping slots 342, wherein a through hole 352 is formed in the center of the fixing frame 350, and the output shaft 21 of the laminar flow motor 20 passes through the through hole 352 and then is fixed with the driving disc 30. With the laminar flow fan 100 shown in fig. 7 to 10, since the center of the driving disk 30 is formed with the groove 32 toward the plurality of annular disks 10, the output shaft 21 of the laminar flow motor 20 is fixedly disposed in the groove 32 of the driving disk 30 after passing through the penetration hole 352.

Fig. 13 is a schematic view of the connection between the laminar flow fan 100 having the circular disk 30 with the conical protrusion 31 and the laminar flow motor 20, fig. 14 is a schematic view of the laminar flow fan 100 from another view angle in fig. 13, and fig. 15 is a schematic cross-sectional view of the laminar flow fan 100 in fig. 13. The surface of the driving disk 30 of the laminar flow fan 100 in fig. 13 to 15 facing the laminar flow motor 20 is a plane, and the surface facing the plurality of annular disks 10 has a conical projection 31 to guide the flow of air entering the laminar flow fan 100 and assist in forming laminar flow wind.

The main function of the driving disc 30 is to fixedly receive the laminar flow motor 20 and to be connected to the plurality of annular discs 10 through a connection member, so as to drive the plurality of annular discs 10 to rotate when the laminar flow motor 20 drives the driving disc 30 to rotate. With the laminar flow fan shown in fig. 13 to 15, since the surface of the drive disk 30 facing the laminar flow motor 20 is a plane, the output shaft 21 of the laminar flow motor 20 is fixedly disposed on the plane side of the drive disk 30 after passing through the through hole 352. In the laminar flow fan 100 shown in fig. 13 to 15, the surface of the driving disk 30 facing the plurality of annular disks 10 has the conical protrusions 31, so that the air entering the laminar flow fan 100 through the air inlet channel 11 can be effectively guided into the gaps between the annular disks 10, and the efficiency of forming laminar flow air is improved.

In a preferred embodiment, the connecting member is a connecting piece 40, and the cross section of the connecting piece 40 has two curves sequentially arranged along the rotation direction of the annular disk 10, and the chord length of the two curves is in a linear relation with the air quantity generated by the laminar flow fan 100. The connecting plate 40 may be provided in plural and evenly spaced throughout the drive disk 30 and the plurality of annular disks 10. The connecting pieces 40 uniformly penetrate through the driving disk 30 and the annular disks 10 at intervals, so that the connection relationship between the driving disk 30 and the annular disks 10 is stable, and further, when the laminar flow motor 20 drives the driving disk 30 to rotate, the driving disk 30 can stably drive the annular disks 10 to rotate, and the working reliability of the laminar flow fan 100 is improved.

It should be noted that the two

curves

41 and 42 may be arcs, non-arcs, straight lines, etc., and the straight line may be a special curve. Where the distance between the two ends of the curve 41 is the same as the distance between the two ends of the curve 42, the chord line 51 length may be the distance between the two ends of the curve 41 or the curve 42. When the distance between the two end points of the curve 41 is different from the distance between the two end points of the curve 42, if the two ends of the curve 41 and the curve 42 are not intersected, the length of the chord line 51 can be the length of the connecting line of the middle points of the curves of the cross section of the connecting sheet 40 except the

curves

41 and 42; if only one end of the

curves

41 and 42 intersect, the chord line 51 length may be the length of the line connecting the midpoint of the curve of the cross-section of the connecting piece 40 excluding the

curves

41, 42 and the end point of the intersection.

As shown in fig. 15, the connecting piece 40 may be a double-arc blade 401 having a cross section having double arcs arranged in sequence in the direction in which the annular disk 10 rotates: the inner arc 41 and the back arc 42, and the inner arc 41 and the back arc 42 are both convex towards the rotating direction of the annular disk 10, have the same center and are arranged in parallel. Fig. 15 is a schematic cross-sectional view of laminar fan 100 viewed from above, in which laminar flow motor 20 drives annular disk 10 to rotate clockwise, and back arcs 42 and inner arcs 41 project in the same direction as annular disk 10. In other embodiments, the laminar flow motor 20 may also drive the annular disk 10 to rotate counterclockwise, and the protruding directions of the back arc 42 and the inner arc 41 may be opposite to those shown in fig. 15.

Fig. 16 is a schematic diagram showing the relationship between the length of the chord line 51 of the connecting sheet 40 in fig. 15 and the air volume and the air pressure. Since the connecting piece 40 of the laminar fan 100 in fig. 15 is a double-arc blade 401, the distance between the two ends of the inner arc 41 and the distance between the two ends of the back arc 42 are the same, and the length of the chord line 51 may be the distance between the two ends of the inner arc 41 or the back arc 42. In fig. 16, the abscissa axis bladchord refers to the length of the chord line 51 of the connecting piece 40 of the laminar flow fan 100, the left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 16 is a schematic diagram showing the relationship between the length of the chord line 51 and the wind volume and the wind pressure when the outer diameter, the inner diameter, the number of layers, the distance, the thickness of the annular disk 10, the installation angle of the connecting sheet 40, and the rotation speed of the laminar flow motor 20 of the laminar flow fan 100 are all kept unchanged. The mounting angle of the connecting piece 40 of the present embodiment may be: on the same cross section of the connecting sheet 40 and the annular disk 10, a chord line 51 between both ends of the inner arc 41 forms an angle with an outer diameter 52 of the annular disk 10 passing through a midpoint of the chord line 51.

When the above-mentioned parameters are all kept unchanged, for example, in a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disk 10 is 115 mm, the number of layers of the annular disks 10 is 8, the pitch of the annular disks 10 is 13.75 mm, the thickness of the annular disk 10 is 2 mm, the installation angle of the connecting piece 40 is 25.5 °, and the rotation speed of the laminar flow motor 20 is 1000rpm, it can be found that after the length of the chord line 51 is increased, both the air volume and the air pressure are greatly improved, and are substantially linear. Considering the limited space inherent in the floor air conditioner indoor unit 300, there is a certain constraint on the overall occupied volume of the laminar flow fan 100. When the outer diameter and the inner diameter of the annular disk 10 are constant, the longer the chord 51 is, the greater the air volume and the wind pressure of the laminar flow fan 100 are, but the length of the chord 51 is also restricted to a certain extent, so that the connecting piece 10 does not penetrate the annular disk 10 excessively, which leads to a decrease in the stability of the laminar flow fan 100. In summary, the length of the chord line 51 can be set to the maximum range that can be achieved, so that the air volume and the air pressure of the laminar flow fan 100 can meet the use requirements of users.

Thus, in the preferred embodiment described above, the chord line 51 length is set to the maximum range achievable while ensuring the stability of the laminar flow fan 100: 40 mm to 42 mm. When the length of the chord line 51 is set to 42 mm, the air volume of the laminar flow fan 100 may be 1741m³H, wind pressureSo as to reach 118.9Pa and completely meet the use requirements of users. At this time, the difference between the outer diameter and the inner diameter of the annular disk 10 is 60 mm, and the length of the chord 51 is set to 42 mm, so that distances of about 9 mm are respectively reserved between the two ends of the inner arc 41 and the back arc 42 and the inner circumference and the outer circumference of the annular disk 10, and on the premise of ensuring the stability of the laminar flow fan 100, the length of the chord 51 is set to the maximum range, so that the air volume and the air pressure of the laminar flow fan 100 can meet the use requirements of users.

Fig. 17 is a schematic view showing the relationship between the installation angle α of the connection piece 40 in fig. 15 and the air volume and the air pressure. Since the connection piece 40 of the laminar flow fan 100 in fig. 15 may be a double-arc blade 401, the installation angle α of the connection piece 40 actually means: on the same cross section of the bi-arc blade 401 and the annular disc 10, a chord line 51 between the two ends of the inner arc 41 forms an angle with the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51. The axis of abscissa, Metal angle (α), in fig. 17, refers to the installation angle of the bi-arc blade 401 of the laminar fan 100, i.e., the included angle formed by the chord line 51 between the two ends of the inner arc 41 and the outer diameter 52 of the annular disk 10 passing through the midpoint of the chord line 51 on the same cross section of the bi-arc blade 401 and the annular disk 10. The left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 17 is a schematic diagram illustrating the relationship between the installation angle α and the air volume and the air pressure when the outer diameter, the inner diameter, the number of layers, the pitch, the thickness, the chord length of the bi-arc blade 401, and the rotation speed of the laminar flow motor 20 of the annular disk 10 of the laminar flow fan 100 are all kept unchanged. The chord length of the double-arc blade 401 of the present embodiment may be the straight distance between both end points of the inner arc 41 or the back arc 42.

In the case where each of the above-mentioned parameters is kept constant, for example, in a preferred embodiment, the outer diameter of the ring-shaped disk 10 of the laminar fan 100 is 175 mm, the inner diameter of the ring-shaped disk 10 is 115 mm, the number of layers of the ring-shaped disks 10 is 8, the pitch of the ring-shaped disks 10 is 13.75 mm, the thickness of the ring-shaped disk 10 is 2 mm, the chord length of the double-circular-arc blade 401 is 35 mm, and the rotation speed of the laminar flow motor 20 is 1000rpm, at which the mounting angle α of the double-circular-arc blade 401 may be set to-5 ° to 55 ° in consideration of the comprehensive air volume and the wind pressure. In addition, when a chord line 51 between two end points of the inner arc 41 and an outer diameter 52 of the annular disk 10 passing through a midpoint of the chord line 51 are sequentially arranged along the rotation direction of the annular disk 10, the installation angle alpha is a positive number; the installation angle α is a negative number when the outer diameter 52 of the annular disk 10 passes through the midpoint of the chord line 51 and the chord line 51 between the two end points of the inner arc 41 in this order in the direction in which the annular disk 10 rotates.

Fig. 18 is a schematic cross-sectional view of a laminar flow fan 100 having an aero blade 402, and fig. 19 is a schematic cross-sectional view of an installation angle α of the aero blade 402 of the laminar flow fan 100 of fig. 18 with respect to an air volume and an air pressure. In a particular embodiment, the connecting piece 40 may also be an aerospace blade 402. The cross section of the aviation blade 402 has a double arc protruding towards the direction of rotation of the annular disk 10, and the double arc includes an inner arc 41 and a back arc 42 sequentially arranged along the direction of rotation of the annular disk 10, the inner arc 41 and the back arc 42 have different circle centers, and both ends are intersected. Fig. 18 is a schematic cross-sectional view of laminar fan 100 viewed from above, in which laminar flow motor 20 drives annular disk 10 to rotate clockwise, and back arcs 42 and inner arcs 41 project in the same direction as annular disk 10. In other embodiments, the laminar flow motor 20 may also drive the annular disk 10 to rotate counterclockwise, and the protruding directions of the back arc 42 and the inner arc 41 may be opposite to those shown in fig. 18.

The mounting angle α of the aircraft blade 402 in fig. 19 actually refers to: on the same cross section of the aero blade 402 and the annular disc 10, a chord line 51 between the ends of the inner or back arcs 41, 42 forms an angle with the outer diameter 52 of the annular disc 10 passing through the midpoint of the chord line 51. The axis of abscissa, Metal angle (α), in fig. 19, refers to the installation angle of the aircraft blade 402 of the laminar fan 100, i.e., the included angle formed by the chord line 51 between the two ends of the inner arc 41 or the back arc 42 and the outer diameter 52 of the annular disk 10 passing through the midpoint of the chord line 51 on the same cross section of the aircraft blade 402 and the annular disk 10. The left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 19 is a schematic diagram illustrating the relationship between the installation angle α and the air volume and the air pressure when the outer diameter, the inner diameter, the number of layers, the pitch, the thickness of the annular disk 10, the chord length of the aviation blade 402, and the rotation speed of the laminar flow motor 20 of the laminar flow fan 100 are all kept constant. The chord length of the aero blade 402 of this embodiment may be the linear distance between the two ends of the inner or back arcs 41, 42, i.e., the length of the chord line 51.

In the case where each of the above-mentioned parameters is kept constant, for example, 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 layers of the annular disks 10 is 8, the pitch of the annular disks 10 is 13.75 mm, the thickness of the annular disk 10 is 2 mm, the chord length of the aero blade 402 is 35 mm, and the rotation speed of the laminar motor 20 is 1000rpm, at which time the installation angle α of the aero blade 402 may be set to-50 ° to 15 ° in consideration of the wind pressure and the wind volume.

Fig. 20 is a schematic diagram of connection between the laminar flow fan 100 and the laminar flow motor 20 with gradually changing pitches of the plurality of annular disks 10, fig. 21 is a schematic diagram of connection between the laminar flow fan 100 and the laminar flow motor 20 from another view angle in fig. 20, and fig. 22 is a schematic diagram of relations between gradually changing pitches of the plurality of annular disks 10 of the laminar flow fan 100 and air volume and air pressure in fig. 20.

As shown in fig. 20 and 21, the connection member of the laminar flow fan 100 may also be a connection rod 60. The connecting rods 60 may also be provided in plurality, and penetrate through the driving disk 30 and the plurality of annular disks 10 at even intervals, so as to ensure that the connection relationship between the driving disk 30 and the plurality of annular disks 10 is stable, and further ensure that the driving disk 30 can stably drive the plurality of annular disks 10 to rotate when the laminar flow motor 20 drives the driving disk 30 to rotate, thereby improving the operational reliability of the laminar flow fan 100. As the distance between two adjacent annular disks 10 gradually increases from one side away from the driving disk 30 to the other side, the air volume of the laminar flow fan 100 can be effectively increased, so that the air outlet of the laminar flow fan 100 meets the use requirement of a user. In a preferred embodiment, the distance between two adjacent annular disks 10 has the same variation, that is, the distance between two adjacent annular disks 10 increases from one side away from the driving disk 30 to the other side.

In fig. 22, the abscissa axis damping uniform expansion Plate distance increment refers to the amount of change in the distance between two adjacent ring disks 10 in the direction from one side away from the driving disk 30 to the other side, the left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Also, the variation amount of the pitch between two adjacent annular disks 10 is the same, that is, the increase or decrease of the pitch between two adjacent annular disks 10 is the same.

Specifically, fig. 22 is a schematic diagram illustrating the relationship between the gradual change of the pitch of the plurality of annular disks 10 and the air volume and the air pressure when the outer diameter, the inner diameter, the number, the thickness of the annular disks 10 of the laminar flow fan 100 and the rotation speed of the laminar flow motor 20 are all kept constant. As shown in fig. 22, when the above-mentioned parameters are all kept constant, the distance between every two adjacent ring disks 10 in the plurality of ring disks 10 gradually changes from one side far away from the driving disk 30 to the other side, which has a large influence on the air volume and a small influence on the air pressure. When the variation of the spacing between two adjacent annular disks 10 in the direction from the side away from the driving disk 30 to the other side, which is indicated by the axis of abscissa, is a positive number, it is described that the spacing 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 amount of change in the pitch between two adjacent ring disks 10 in the direction from the side away from the driver disk 30 to the other side, which is indicated by the abscissa axis, is a negative number, it is described that the pitch between each two adjacent ring disks 10 in the plurality of ring disks 10 gradually decreases from the side away from the driver disk 30 to the other side.

As can be seen from fig. 22, when the pitch variation amounts between every two adjacent annular disk sheets 10 in the plurality of annular disk sheets 10 are-1 mm, 1 mm and 2 mm, the air volume and the air pressure of the laminar flow fan 100 are both greatly improved. The interval between every two adjacent ring disks 10 in the plurality of ring disks 10 is set to gradually increase from one side far from the driving disk 30 to the other side, considering the air volume and the air pressure of the laminar flow fan 100 together. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow 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 1000rpm (revolutions per minute), and at this time, in comprehensive consideration of the air volume and the air pressure of the laminar flow fan 100, the distance between two adjacent annular disks 10 in the 8 annular disks 10 may be set sequentially from one side far away from the driving disk 30 to the other side: the distance between two adjacent annular disks 10 is gradually increased by 1 mm from one side far away from the drive disk 30 to the other side, namely, the distance between two adjacent annular disks 10 is 13.75 mm, 14.75 mm, 15.75 mm, 16.75 mm, 17.75 mm, 18.75 mm and 19.75 mm. It should be noted that, the distance between 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, which actually means that the distance between two adjacent annular disks 10 gradually increases along the direction of the airflow flowing in the air inlet channel 11.

Fig. 23 is a partial sectional view of the laminar flow fan 100 with gradually changing inner diameters of a plurality of annular disks 10, and fig. 24 is a schematic diagram of the relationship between the gradual change of the inner diameters of the plurality of annular disks 10 and the air volume and the air pressure of the laminar flow fan 100 in fig. 23. As the inner diameters of the plurality of annular disks 10 gradually decrease from one side away from the driving disk 30 to the other side, the air volume of the laminar flow fan 100 can be effectively increased, so that the air outlet of the laminar flow fan 100 meets the use requirement of a user. In a preferred embodiment, the inner diameters of two adjacent annular disks 10 vary by the same amount, that is, the inner diameters of the annular disks 10 decrease from the side away from the driving disk 30 to the other side by the same amount.

In fig. 24, the abscissa axis damping uniform expansion Inner radius increment refers to the variation of the Inner diameter of each ring disc 10 and the Inner diameter of the ring disc 10 adjacent to the lower side, the left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 24 is a schematic diagram illustrating the relationship between the gradual change of the inner diameters of the plurality of annular disks 10 and the air volume and the air pressure when the outer diameter, the distance, the number, the thickness of the annular disks 10 of the laminar flow fan 100 and the rotation speed of the laminar flow motor 20 are all kept constant. As shown in fig. 24, when the above-mentioned parameters are all kept constant, the inner diameters of the plurality of annular disks 10 gradually change from one side away from the driving disk 30 to the other side, and the influence on the air volume is large and the influence on the air pressure is small. When the variation of the inner diameter of each annular disk 10 represented by the abscissa axis and the inner diameter of the adjacent annular disk 10 below is a positive number, it means that the inner diameters of the plurality of annular disks 10 gradually increase from one side away from the driving disk 30 to the other side; when the change amount of the inner diameter of each ring disk 10 shown by the abscissa axis and the inner diameter of the ring disk 10 adjacent below is a negative number, it means that the inner diameters of the plurality of ring disks 10 gradually decrease from one side away from the driving disk 30 to the other side.

As can be seen from fig. 24, when the inner diameters of the plurality of annular disks 10 gradually decrease from one side away from the driving disk 30 to the other side, the air volume of the laminar flow fan 100 increases and the air pressure decreases slightly; when the inner diameters of the plurality of ring disks 10 gradually increase from one side away from the driving disk 30 to the other side, the wind pressure of the laminar flow fan 100 slightly increases and the wind volume greatly decreases. Thus, the inner diameters of the plurality of ring disks 10 are set to be gradually reduced from one side away from the driving disk 30 to the other side in consideration of the air volume and the air pressure of the laminar flow fan 100.

In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the pitch of the annular disks 10 is 13.75 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 1000rpm (revolutions per minute), and at this time, the variation between the inner diameter of each annular disk 10 and the inner diameter of the adjacent annular disk 10 below may be set to be-5 mm in consideration of the air volume and the air pressure of the laminar flow fan 100. That is, the inner diameters of the 8 annular disks 10 from one side to the other side away from the driving disk 30 can be set as follows: the inner diameter of each annular disk 10 is reduced by 5mm from the inner diameter of the adjacent annular disk 10 below, by 115 mm, 110 mm, 105 mm, 100 mm, 95 mm, 90 mm, 85 mm, and 80 mm. It should be noted that the distance between the annular disks 10 in the above description specifically refers to the distance between two adjacent annular disks 10. It should be emphasized that the inner diameters of the plurality of annular disks 10 gradually decrease from one side away from the driving disk 30 to the other side, which means that the inner diameters of the plurality of annular disks 10 gradually decrease along the direction of the airflow flowing in the air inlet channel 11.

Fig. 25 is a schematic diagram of a central angle of a connecting line of an inner diameter and an outer diameter of a plurality of annular disks 10 of the laminar flow fan 100 in which the annular disks 10 are arc-shaped disks on the same longitudinal section passing through a central axis, and fig. 26 is a schematic diagram of a relationship between the central angle and air volume and air pressure in fig. 25. Each of the ring disks 10 of the laminar flow fan 100 of fig. 25 is an arc-shaped disk which gradually approaches the driving disk 30 from the center to the edge and protrudes toward one side of the driving disk 30. Compared with a plane disk, the arc disk can enable the angle of external air entering the laminar flow fan 100 to better accord with the flow of fluid, so that the external air can enter the laminar flow fan 100 more conveniently, and the air volume loss is effectively reduced. Further, the inner diameters of the plurality of annular disks 10 are gradually reduced from one side away from the driving disk 30 to the other side, and the inner and outer diameters of the plurality of annular disks 10 on the same longitudinal section passing through the central axis form a central angle θ.

In fig. 26, the abscissa axis θ indicates a central angle of a line connecting the inner and outer diameters of the plurality of annular disks 10 on the same vertical section passing through the central axis, the left ordinate axis Mass flow rate indicates air volume, and the right ordinate axis Pressure means air Pressure. Specifically, fig. 26 is a schematic diagram showing the relationship between the central angle θ and the air volume and the air pressure when the outer diameter, the number of layers, the pitch, the thickness of the annular disk 10 of the laminar fan 100 and the rotation speed of the laminar motor 20 are all kept constant. As shown in fig. 26, when the above-mentioned parameters are all kept constant, the air volume of the laminar flow fan 100 increases and then decreases as the central angle θ increases, and the air pressure slightly increases. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the number of layers of the annular disk 10 is 10, the pitch of the annular disks 10 is 13.75 mm, the thickness of the annular disk 10 is 2 mm, and the rotation speed of the laminar flow motor 20 is 1000rpm (revolutions per minute), and in consideration of the air volume and the air pressure, the central angle θ of the inner and outer diameter connecting lines of the plurality of annular disks 10 on the same longitudinal section passing through the central axis may be set to be 9 ° to 30 °. As shown in fig. 26, when the central angle θ is set to 15 °, the air volume of the laminar flow fan 100 reaches the maximum value.

The indoor unit 300 of the floor air conditioner of the embodiment includes: a housing 310, the interior of which defines a cavity, and the upper and lower portions of the housing 310 are provided with an air outlet 320 and an air inlet 330, and the housing 310 includes a front panel 311, a rear case 312, a top plate 313 and a bottom plate 314; an evaporator 382 disposed inside the cavity corresponding to the air inlet 330, configured to exchange heat with air entering the cavity through the air inlet 330, wherein the evaporator 382 is flat and parallel to the front panel 311; a laminar flow fan 110 disposed above the evaporator 382, and configured to generate laminar flow air from a part of the air heat-exchanged by the evaporator 382 by using a viscous effect, and to blow the laminar flow air out of the air outlet 320 at an upper portion; and a single-suction centrifugal fan 510 disposed below the laminar flow fan 110, having an axial direction perpendicular to the front panel 311, and configured to blow out a part of air for heat exchange in the evaporator 382 from the air outlet 320 at the lower portion. The indoor unit 300 of the vertical air conditioner is provided with the laminar flow fan 110, so that the laminar flow air supply at the upper part is realized through the viscous effect, the noise is low and the air quantity is high in the air supply process, and the use experience of a user is effectively improved; and a single-suction centrifugal fan 510 is also arranged, so that the air output and air pressure of the lower part can be effectively improved.

Further, in the indoor unit 300 of the floor air conditioner of the present embodiment, the casing 310 is provided with an air outlet 320 at an upper portion thereof around the laminar flow fan 100; or the floor air conditioner indoor unit 300 may further include: a wind shielding member 371 disposed outside the laminar flow fan 100 and having a notch 373; the casing 310 is provided with the air outlet 320 at a position corresponding to the notch 373, so that the vertical air conditioner indoor unit 300 can supply air at 360 degrees from the upper part in four directions or three directions, two directions and one direction. The rear shell 312 includes a rear panel 315 and two side panels 316. The air inlet 330 may be disposed on the rear panel 315 to realize single-sided air inlet. The flat plate-shaped evaporator 382 is matched with the air inlet 330, so that air entering the cavity through the air inlet 330 can exchange heat through the evaporator 382. The flat plate evaporator 382 also effectively reduces the volume occupied inside the cavity. The laminar flow fan 110 includes a laminar flow fan 100 and a laminar flow motor 20, and the laminar flow fan 100 is disposed inside a cavity corresponding to the air outlet 320 at the upper portion. The laminar flow motor 20 is fixed between the fixing frame 350 and the fixing plate 340, wherein the center of the fixing frame 350 is provided with a through hole 352, and the output shaft 21 of the laminar flow motor 20 passes through the through hole 352 and then is fixed with the driving disc 30 of the laminar flow fan 100, so that the connection firmness of the laminar flow fan 100 and the laminar flow motor 20 can be effectively enhanced, and the overall working reliability is improved.

Further, in the floor air conditioner 300 of the present embodiment, the plurality of annular disks 10 of the laminar flow fan 100 may be arranged according to one or more of the following structures: the inner diameter of the plurality of annular disks 10 is gradually reduced from one side far away from the driving disk 30 to the other side; the distance between two adjacent annular disks 10 in the plurality of annular disks 10 gradually increases from one side far away from the driving disk 30 to the other side; each of the annular disks 10 is an arc-shaped disk which gradually approaches the driving disk 30 from the center to the edge and protrudes toward one side of the driving disk 30. The above-mentioned form of setting up a plurality of annular disks 10 all can effectively promote laminar flow fan 100's amount of wind for laminar flow fan 100's air-out satisfies user's user demand. In addition, the connecting piece may be a connecting piece 40, and the cross section of the connecting piece 40 has two curves sequentially arranged along the rotation direction of the annular disk 10, and the chord length of the two curves is in a linear relation with the air quantity generated by the laminar flow fan 100. The connecting sheet 40 is arranged to effectively increase the wind pressure of the laminar flow fan 100, so that after laminar flow wind blows out through the gaps among the plurality of annular disks 10, the air outside the laminar flow fan 100 is pressed into the annular disks 10 through the air inlet channel 11 due to the action of pressure difference, and the circulation is repeated, thereby forming laminar air circulation. The plurality of air outlets 12 formed by the gaps between the plurality of annular disks 10 can enable the laminar flow fan 100 to realize 360-degree air supply, avoid various uncomfortable symptoms caused by direct blowing of air supply by the air conditioner, and further improve the use experience of users.

It should be understood by those skilled in the art that, unless otherwise specified, terms used to indicate orientation or positional relationship in the embodiments of the present invention such as "up," "down," "left," "right," "front," "rear," and the like are based on the actual usage state of the indoor unit 300 of the vertical air conditioner, and these terms are only used for convenience of describing and understanding the technical solution of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore, should not be construed as limiting the present invention.

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

Claims

1. An indoor unit of a floor type air conditioner, comprising:

the air conditioner comprises a shell, a front panel, a rear shell, a top plate and a bottom plate, wherein a cavity is defined in the shell, air outlets are formed in the upper portion and the lower portion of the shell, an air inlet is formed in the middle of the shell, and the shell comprises the front panel, the rear shell, the top plate and the bottom plate;

the evaporator is arranged in the cavity corresponding to the air inlet and is configured to exchange heat for air entering the cavity through the air inlet, and the evaporator is flat and parallel to the front panel;

the laminar flow fan is arranged above the evaporator and is configured to enable part of air subjected to heat exchange by the evaporator to form laminar flow air by utilizing a viscosity effect and enable the laminar flow air to be blown out from the air outlet at the upper part; and

the single-suction centrifugal fan is arranged below the laminar flow fan, the axial direction of the single-suction centrifugal fan is vertical to the front panel, and the single-suction centrifugal fan is configured to drive part of air subjected to heat exchange by the evaporator to be blown out from the air outlet at the lower part,

the laminar flow fan includes: laminar flow fan and laminar flow motor, laminar flow fan set up in corresponding upper portion the air outlet inside the cavity, laminar flow fan includes: a plurality of annular disks disposed in parallel spaced apart from each other and having the same central axis; the driving discs are arranged on one side of the annular discs at intervals in parallel; and a connecting member penetrating the drive disk and the plurality of annular disks to connect the plurality of annular disks to the drive disk,

the connecting piece is a connecting piece, the cross section of the connecting piece is provided with two sections of curves which are sequentially arranged along the rotating direction of the annular disc, and the chord length of the two sections of curves and the air volume generated by the laminar flow fan are in a linear relation.

2. An indoor unit for a floor air conditioner according to claim 1,

the rear case includes: a back panel and two side panels, an

The air inlet is formed in the rear panel to achieve single-side air inlet.

3. The indoor unit of claim 2, further comprising:

a partition plate disposed between the evaporator and the front panel to prevent air heat-exchanged through the evaporator from flowing to a front of the cavity.

4. The indoor unit of claim 1, further comprising:

a volute having an inlet and an outlet, the outlet being disposed opposite the lower outlet;

the single suction centrifugal fan is arranged inside the volute and is also configured to: and the air which is subjected to heat exchange of the evaporator is driven to enter the volute from the inlet, is deflected twice in the volute and then is discharged from the outlet, and then is blown out through the air outlet at the lower part.

5. An indoor unit for a floor air conditioner according to claim 1,

the centers of the annular disks form an air inlet channel together, and air in the cavity enters gaps among the annular disks through the air inlet channel; and

the laminar flow motor is connected with the laminar flow fan and configured to drive the annular discs to rotate, so that the air boundary layers close to the surfaces of the annular discs move from inside to outside in a rotating mode, and laminar flow wind is formed and blown out of the air outlet.

6. An indoor unit for a floor air conditioner according to claim 5,

the laminar flow motor is further configured to: the driving disc is directly driven to rotate, and the driving disc drives the annular discs to rotate.

7. The indoor unit of claim 6, further comprising:

the fixing plate is provided with a plurality of reinforcing ribs on one side and a plurality of clamping grooves on the other side; and

the fixing frame faces one side of the fixing plate and is provided with a plurality of clamping jaws corresponding to the clamping grooves, so that the plurality of clamping jaws are respectively screwed with the plurality of clamping grooves and then fix the laminar flow motor between the fixing frame and the fixing plate, a through hole is formed in the center of the fixing frame, and an output shaft of the laminar flow motor penetrates through the through hole and then is fixed with the driving disc.

8. The indoor unit of claim 6, further comprising:

a wind guiding ring arranged on one side of the plurality of annular disks far away from the driving disk and used for guiding the wind

The air guide ring is configured to guide part of air which exchanges heat through the evaporator into the air inlet channel.

9. An indoor unit for a floor air conditioner according to claim 5,

the upper part of the shell surrounds the laminar flow fan for one circle and is provided with the air outlet; or

The indoor unit of the floor air conditioner further comprises: the wind shielding piece is arranged outside the laminar flow fan and provided with a notch; the shell is provided with the air outlet at the position corresponding to the notch.

10. An indoor unit for a floor air conditioner according to claim 6,

a groove is formed in the center of the driving disc towards the plurality of annular discs, and the laminar flow motor is fixedly arranged in the groove; or

The surface of the drive disk facing the laminar flow motor is planar, and the surface facing the plurality of annular disks has a conical projection to guide the flow of air entering the laminar flow fan and assist in forming the laminar flow wind.

11. An indoor unit for a floor air conditioner according to claim 6,

the cross section of the connecting piece is provided with double arcs which are sequentially arranged along the rotating direction of the annular disc: the inner arc and the back arc are both convex towards the rotating direction of the annular disc, and have the same circle center and are arranged in parallel or have different circle centers and are intersected at two ends.

12. The indoor unit of claim 6, wherein the plurality of annular discs are arranged according to one or more of the following structures:

the inner diameters of the annular discs are gradually reduced from one side far away from the driving disc to the other side;

the distance between two adjacent annular disks in the plurality of annular disks is gradually increased from one side far away from the driving disk to the other side;

each annular disc is an arc disc which is gradually close to the driving disc from the center to the edge and protrudes towards one side of the driving disc.