CN111442376B - Ceiling type air conditioner indoor unit - Google Patents
Ceiling type air conditioner indoor unit Download PDFInfo
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- CN111442376B CN111442376B CN201910045461.3A CN201910045461A CN111442376B CN 111442376 B CN111442376 B CN 111442376B CN 201910045461 A CN201910045461 A CN 201910045461A CN 111442376 B CN111442376 B CN 111442376B
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- Prior art keywords
- air
- shell
- air inlet
- indoor unit
- flow guide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
Abstract
The invention provides a ceiling type air conditioner indoor unit, which comprises a shell, wherein the bottom of the shell is provided with an air inlet, and the side part of the shell is provided with at least one air supply outlet; the heat exchanger is arranged in the shell; the fan is arranged in the shell and used for promoting indoor air to enter the shell from the air inlet, exchange heat with the heat exchanger and blow back the air into the room through the air supply outlet; the flow guide piece is arranged at the air inlet in a vertically-sliding manner and is used for opening or closing the air inlet, and when the air inlet is opened, indoor air is guided to flow to the air inlet through a gap between the outer peripheral surface of the flow guide piece and the bottom surface of the shell, and the size of the gap can be conveniently adjusted to different positions through translation; and the driving mechanism is configured to controllably drive the diversion piece to translate up and down.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a ceiling type air conditioner indoor unit.
Background
Conventional household air conditioners are typically cabinet or on-hook. Indoor units of cabinet air conditioners and on-hook units typically have only one supply air outlet to supply air to the room. In addition, the cabinet machine and the hanging machine are limited by structures, air can be supplied in one direction only, and the air supply direction is single.
In addition, although the air guide plate and the swing blade are used for guiding air, the air supply range of the traditional cabinet air conditioner or the conventional on-hook air conditioner is still not large.
Disclosure of Invention
One object of the present invention is to provide an indoor unit of an air conditioner capable of multi-angle and omni-directional air supply.
Another object of the present invention is to enable an air inlet of an indoor unit of a ceiling type air conditioner to be closed to beautify the bottom appearance of the indoor unit and prevent dust from entering.
The invention also aims to stabilize the flow form of the air inlet flow of the indoor unit of the ceiling type air conditioner, reduce the eddy loss so as to ensure that the air inlet is smoother, reduce the wind resistance and ensure that the air inlet amount of the air inlet opening is adjustable.
In particular, the present invention provides a ceiling type air conditioner indoor unit, comprising:
the bottom of the shell is provided with an air inlet, and the side part of the shell is provided with at least one air supply outlet;
the heat exchanger is arranged in the shell;
the fan is arranged in the shell and used for promoting indoor air to enter the shell from the air inlet, exchange heat with the heat exchanger and blow back the air into the room through the air supply outlet;
the flow guide piece is arranged at the air inlet in a vertically-sliding manner and is used for opening or closing the air inlet, and when the air inlet is opened, indoor air is guided to flow to the air inlet through a gap between the outer peripheral surface of the flow guide piece and the bottom surface of the shell, and the size of the gap can be conveniently adjusted to different positions through translation; and
and the driving mechanism is configured to controllably drive the diversion piece to translate up and down.
Optionally, the outer circumferential surface of the flow guiding member is a tapered guiding surface which is gradually expanded outwards from top to bottom in the radial direction and is used for guiding the air to gradually flow upwards in a deflected manner so as to enter the air inlet.
Optionally, the top surface and the bottom surface of the flow guide piece are both circular as a whole, and the circle centers of the flow guide piece and the bottom surface of the flow guide piece are located on the same vertical axis; the outer peripheral surface of the flow guide member extends downwardly and radially outwardly from the peripheral edge of the top surface to the bottom surface to form a tapered guide surface.
Optionally, the air inlet is circular; the flow guide piece and the air inlet are coaxially arranged.
Optionally, the bottom wall of the housing around the air inlet is a flow guide surface extending radially outward from the edge of the air inlet and gradually extending downward, so as to define an air duct for the indoor air to enter the housing together with the conical guide surface.
Optionally, the drive mechanism comprises: the two ends of each pulling wire are respectively and directly or indirectly fixed on the flow guide piece and the shell to bear the gravity of the flow guide piece, and when the flow guide piece is at the lowest position, the connection point of each pulling wire and the flow guide piece is lower than the connection point of the flow guide piece and the shell; and the driving motor is arranged on the shell or the flow guide piece, and the plurality of pulling wires are wound on a rotating shaft of the driving motor, so that the driving motor can roll up the pulling wires through positive rotation, and then pull the flow guide piece to move upwards, or release the pulling wires through negative rotation, and then the flow guide piece moves downwards under the action of self gravity.
Optionally, the bottom surface of the flow guide piece is recessed upwards to form a cavity, and the driving motor is fixed in the cavity; one end of each pulling wire penetrates through the peripheral surface of the flow guide piece and extends into the cavity so as to be wound on the rotating shaft of the driving motor, and the other end of each pulling wire is fixed on the bottom wall of the shell.
Optionally, the ceiling type air conditioner indoor unit further includes: a vertically extending guide shaft located within the housing; and the flow guide piece can be telescopically arranged on the guide shaft up and down, so that the flow guide piece is limited by the guide shaft to only translate up and down.
Alternatively, the casing may be rectangular as a whole, and four side portions thereof may have one air supply opening, respectively.
Optionally, the heat exchanger is between the fan and the supply air outlet and surrounds the fan.
The ceiling type air conditioner indoor unit is hung on a roof, the air inlet is positioned at the bottom, and the air supply outlet is positioned at the side. So, can set up a plurality of supply-air outlets at the lateral part, a plurality of supply-air outlets are towards different directions, can accomplish two sides air-out, trilateral air-out, four sides air-out and 360 all-round air supplies of circumference even, and the air supply scope is very big.
Furthermore, the flow guide piece is arranged in the ceiling type air conditioner indoor unit, when the air conditioner is turned off, the flow guide piece is moved upwards to close the air inlet, so that the bottom of the ceiling type air conditioner indoor unit is more attractive, and dust and foreign matters are prevented from entering the shell. When the air conditioner is started, the flow guide piece is controlled to move downwards to open the air inlet. In addition, the size of the gap between the flow guide piece and the shell can be adjusted by translating the flow guide piece to different positions, so that the flow guide piece is matched with the rotating speed of the fan, and the operating efficiency of the fan is improved.
Furthermore, in the ceiling type air conditioner indoor unit, air flows to the air inlet from the gap between the flow guide piece and the shell. Compared with the scheme that wind directly vertically and upwards enters the shell from the bottom of the shell by some structures, the wind guide of the flow guide piece enables the wind inlet direction to be close to the horizontal direction, so that the air can more smoothly enter the laminar flow fan, and the energy consumption and the noise of the laminar flow fan are reduced.
Furthermore, the ceiling type air conditioner indoor unit utilizes the driving motor to wind or release the traction line to adjust the height of the flow guide piece, has simple and ingenious structure and lower realization cost.
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 illustrating a ceiling type air conditioner indoor unit according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of the ceiling type indoor unit of the air conditioner shown in fig. 1, cut away in a vertical cross-sectional view;
fig. 3 is a schematic view illustrating a state where the ceiling type air conditioning indoor unit shown in fig. 2 is moved up by a guide member;
FIG. 4 is a schematic view of the engagement of the drive motor shaft and the pull lead of FIG. 2;
FIG. 5 is a bottom perspective view of a laminar flow fan;
FIG. 6 is a schematic diagram of the air supply principle of the laminar flow fan;
FIG. 7 is a schematic cross-sectional view of a plurality of annular disks of a laminar flow fan;
FIG. 8 is a schematic view of the air circulation of a laminar flow fan according to one embodiment of the present invention;
FIG. 9 is a schematic view of the air circulation of a laminar flow fan according to another embodiment of the present invention;
FIG. 10 is a schematic diagram showing the relationship between the gradual change of the pitch of a plurality of annular disks and the air volume and the air pressure of a laminar flow fan.
Detailed Description
A ceiling type air conditioning indoor unit according to an embodiment of the present invention will be described with reference to fig. 1 to 10. Where the orientations or positional relationships indicated by the terms "front," "back," "upper," "lower," "top," "bottom," "inner," "outer," "lateral," and the like are based on the orientations or positional relationships shown in the drawings, the description is for convenience only and to simplify the description, and no indication or suggestion is made that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
The ceiling type air conditioner indoor unit and the air conditioner outdoor unit (not shown) of the embodiment of the invention form a vapor compression refrigeration cycle system together, so that the indoor environment can be cooled/heated.
Fig. 1 is a schematic view illustrating a ceiling type air conditioner indoor unit according to an embodiment of the present invention; fig. 2 is a cross-sectional view of the ceiling type indoor unit of the air conditioner shown in fig. 1, cut away in a vertical cross-sectional view; fig. 3 is a schematic view illustrating a state in which the ceiling type air conditioning indoor unit shown in fig. 2 is moved up by the air guide.
As shown in fig. 1 to 3, a ceiling type air conditioning indoor unit according to an embodiment of the present invention may generally include a casing 100, a heat exchanger 400, a fan 300, a guide member 200, and a driving mechanism 500.
The ceiling type air conditioning indoor unit is integrally suspended below an indoor roof, and the top of the casing 100 is used for being connected with the roof. The housing 100 has an air inlet 110 at the bottom and at least one air blowing opening 120 at the side. For example, if the indoor unit is installed on a roof near a side wall, only one air supply opening may be provided. If the side wall is kept away from to the mounted position of this indoor set, if set up in roof central authorities, can set up like a plurality of air supply outlets towards the diverse such as 2, 3, 4 to realize multi-angle air supply effects such as two-sided air-out, trilateral air-out, four sides air-out. As shown in fig. 1, the casing 100 is rectangular as a whole, and four side portions of the casing 100 are respectively provided with one air blowing port 120 to realize air blowing in four directions. Even, the casing 100 may be circular, and the air outlets may be formed at all circumferential angles for air outlet, so as to realize 360 ° all-directional air supply. In addition, because of the higher mounted position of the indoor unit of the ceiling type air conditioner, the air-out coverage range is also very large, the refrigerating/heating speed is favorably improved, and the user feels more comfortable.
Disposed within the housing 100 is a heat exchanger 400, which may be an evaporator of a vapor compression refrigeration cycle. When the air conditioner is turned on, indoor air enters the casing 100 from the air inlet 110, flows through the heat exchanger 400, exchanges heat with the heat exchanger 400 to become heat-exchange air (the heat-exchange air is cold air during cooling, and the heat-exchange air is hot air during heating), and the heat-exchange air is blown back to the indoor space from the air supply outlet 120 to realize indoor cooling/heating.
A fan 300 is disposed within the housing 100 for powering the airflow process. The fan should be set up to the radial air-out structure of bottom air inlet. The bottom air inlet is to absorb the indoor air from the air inlet 110, and the air outlet is radial to blow the air to the air outlets 120. The fan 300 may be in the form of a centrifugal fan, a laminar flow fan, or the like. As in the embodiment of fig. 1-3, the fan 300 is a laminar flow fan. Fig. 2 illustrates the wind direction with arrows.
In some embodiments, as shown in fig. 2, the heat exchanger 400 may be located between the fan 300 and the air blowing opening 120 and surround the fan 300, so that the airflow passes through the surface of the heat exchanger 400 more, and the heat exchange efficiency is improved. The specific shape of the heat exchanger 400 may be a complete ring (circle or square ring) to completely surround the fan 300, or a partial ring having an open "C" shape.
The guide member 200 is disposed at the intake vent 110 to be vertically translatable, and is configured to open or close the intake vent 110. When the air inlet 110 is opened by the air guide member 200, the indoor air is guided to flow to the air inlet 110 through a gap between the outer circumferential surface of the air guide member 200 and the bottom surface of the casing 100. The driving mechanism 500 is configured to drive the deflector 200 to translate up and down under the control of the controller of the air conditioner. The specific control method is as follows.
When the air conditioner is turned off, the air guide member 200 is moved upward to close the air inlet 110, so as to prevent dust and foreign materials from entering the casing 100, as shown in fig. 3. In addition, the bottom appearance of the ceiling indoor unit (the bottom of the ceiling indoor unit mainly faces to users) is more attractive, and the influence of complicated air inlet grille arranged at the bottom of the shell 100 on the appearance is avoided. To achieve better appearance beautifying effect.
When the air conditioner is turned on, the air guide member 200 is controlled to move down to open the air inlet 110, as shown in fig. 2. Compared with the scheme of making the wind directly vertically enter the housing 100 from the bottom of the housing 100 upwards, the present embodiment makes the wind flow from the gap between the airflow guiding member 200 and the bottom surface of the housing 100 to the air inlet 110, that is, the airflow guiding member 200 plays a role in guiding the airflow, which makes the flow pattern of the air more stable and reduces the eddy loss. Meanwhile, for the embodiment using the laminar flow fan, the air guiding function of the air guiding member 200 makes the air inlet direction close to the horizontal direction, so that the air enters the laminar flow fan more smoothly (because the annular disk 10 of the laminar flow fan extends horizontally), and the energy consumption and noise of the laminar flow fan 300 are reduced.
In addition, in the present embodiment, the size of the gap between the outer circumferential surface of the air guide member 200 and the bottom surface of the casing 100 can be adjusted by translating the air guide member 200 to different positions, so that the gap matches with the rotation speed of the fan 300, thereby improving the operation efficiency of the fan 300. For example, when the air-conditioning cooling/heating demand is large and the fan 300 is operated at a high speed, the gap is increased. When the cooling/heating demand of the air conditioner is small and the fan 300 is operated at a low speed, the gap is reduced.
An alternative configuration of the deflector and drive mechanism is described below.
As shown in fig. 2, the outer peripheral surface of the baffle member 200 is a tapered guide surface 201 that is gradually enlarged outward in the radial direction (r direction) from top to bottom. After the indoor air enters the gap between the air guide member 200 and the housing 100 from the periphery of the air guide member 200, the indoor air is guided by the tapered guide surface 201 to gradually flow obliquely upwards so as to facilitate the indoor air to enter the air inlet 110. It will be appreciated that the generatrix of the conical guide surface 201 (i.e. the intersection with the section through the axis of rotation) need not be straight, but may be curved concavely at both ends compared to the middle as shown in fig. 2.
More specifically, the top and bottom surfaces of the guide member 200 are circular (refer to fig. 1), and the centers of the two are located on the same vertical axis, i.e., the rotation axis of the guide member 200. The outer peripheral surface of the flow guide member 200 extends from the periphery of the top surface downwardly and radially outwardly to the bottom surface to constitute the aforementioned tapered guide surface 201. The air inlet 110 may also be circular, and the air guide member 200 and the air inlet 110 are coaxially disposed, so that the appearance of the fan is more attractive, and air inlet at 360 ° of the circumferential direction of the air inlet 110 is more uniform, thereby improving the fan efficiency.
In some embodiments, as shown in fig. 2, the bottom wall of the casing 100 around the intake vent 110 is a flow-guiding surface 140 extending radially outward from the edge of the intake vent 110 and gradually extending downward, and the flow-guiding surface 140 is generally ring-shaped. The guiding surface 140 and the tapered guiding surface 201 define an air channel for indoor air to enter the casing 100, and the air channel is similar to a volute of a centrifugal fan, so that the air inlet guiding function is enhanced, and the air suction efficiency of the laminar flow fan 300 is improved.
In some embodiments, the drive mechanism 500 includes a plurality of pull wires and a drive motor. Each of the pulling wires has two ends directly or indirectly fixed to the deflector 200 and the housing 100, respectively, for bearing the weight of the deflector 200. When the flow guide member 200 is at the lowest position, the connection point of each pulling wire with the flow guide member 200 is lower than the connection point with the housing 100. The driving motor is installed on the casing 100 or the diversion part 200, and a plurality of pulling wires are wound on the rotating shaft of the driving motor, so that the driving motor can roll up the pulling wires through positive rotation, and then the diversion part is pulled to move upwards, or the pulling wires are released through negative rotation, and the diversion part moves downwards under the action of self gravity.
An alternative construction of the drive mechanism is shown in figures 2 and 3. The bottom surface of the baffle member 200 is recessed upwardly to form a cavity 202. The drive motor 520 is secured within the cavity 202. One end of each pulling wire 510 penetrates through the outer circumferential surface of the flow guide 200 (the flow guide is provided with a corresponding hole to allow the pulling wire to pass through), and extends into the cavity 202 to be wound on the rotating shaft 521 of the driving motor 520, and the other end is fixed to the bottom wall of the casing 100. When the deflector 200 is at the lowest position, the connection point of each pulling wire to the deflector 200 is lower than the connection point to the housing 100. The advantage of setting up like this is no matter how many guys that set up, only need set up a driving motor can.
When the air guide member 200 needs to be moved upwards, the driving motor 520 rotates forward to drive the rotating shaft 521 to start to pull the wire 510, so that the linearly extending part of the wire 510 is continuously shortened until the wire 520 extends horizontally, and the air guide member 200 is moved upwards to the position shown in fig. 3. Of course, the driving motor 520 is controlled to fix the rotation shaft 521, so as to keep the air guide member 200 in the state of fig. 3. And thereafter, the portion of the pull wire 510 extending straight cannot continue to shorten, and the baffle 200 has reached its highest point where it is likely to reach. When the diversion member 200 needs to be moved downwards, the driving motor 520 is rotated reversely to release the pulling wire 510, so that the diversion member 200 moves downwards under the action of self gravity.
The number of the pulling wires 510 may be 3, 4 or more, and the connection points with the casing 100 are uniformly distributed on a circumference, so that the length of the straight extension portion of the pulling wires is always the same, and the diversion member 200 can translate without overturning. Fig. 4 is a schematic view of the driving motor shaft and the pulling wire in fig. 2. Fig. 4 illustrates the connection of 4 pulling wires 510 on the rotating shaft 521. When the rotating shaft 521 rotates in the direction indicated by the arrow (this direction is defined as forward rotation), the pulling wire 510 is continuously wound thereon. When the shaft 521 rotates in the opposite direction (defined as reverse rotation), the pull wire 510 is released.
As shown in fig. 2 and 3, a guide shaft 160 extending vertically is also provided in the housing 100. The guide member 200 (with corresponding holes) is telescopically mounted on the guide shaft 160 up and down, so that the guide shaft 160 limits the guide member 200 to only translate up and down, which makes the up and down translation of the guide member 200 more stable. When the fan 300 is a laminar flow fan, the top of the guide shaft 160 may be mounted on the lower side of the circular disk 30 of the laminar flow fan. The guide shaft 160 can rotate with the circular disk 30, but the guide member 200 and the guide shaft 160 are rotatably connected so that the guide member 200 does not rotate with the guide shaft 160. Of course, in some alternative configurations, the guide shaft 160 may be directly fixed to the housing 100.
In some alternative configurations not shown in the drawings, a drive motor may be provided for each pull lead to wind the pull lead. Each driving motor is arranged on the shell, and all the driving motors synchronously rotate so as to synchronously wind or release all the traction wires.
The ceiling type air conditioner indoor unit utilizes the driving motor to wind or release the traction line to adjust the height of the flow guide piece, has simple and ingenious structure and lower realization cost.
In some alternative embodiments, the diversion member may be driven to translate by a linear motor, or by a rotary motor and rack and pinion mechanism.
As shown in fig. 2, the fan 300 according to the embodiment of the present invention is a laminar flow fan. The rotation axis (x-axis) of the laminar flow fan extends in the vertical direction (up-down direction), and generates laminar flow wind by the viscosity of air during operation. Because the ceiling type air conditioner indoor unit is provided with the plurality of air supply outlets 120 for simultaneously supplying air, the noise problem is more prominent, and the running noise of the laminar flow fan is smaller, so that the noise problem of the whole air conditioner can be relieved to a certain extent.
Fig. 5 is a bottom perspective view of a laminar flow fan. As shown in fig. 2 and 5, the laminar flow fan may generally include a plurality of annular disks 10, a circular disk 30, and a motor 20.
The plurality of annular disks 10 are arranged in parallel at intervals, fixedly connected with each other, and have axes extending along the vertical direction and being collinear. The axis of the circular disk 30 is arranged above the uppermost annular disk in line with the plurality of annular disks 10, and is spaced apart from and fixedly connected to the uppermost annular disk. The center of the circular disk 30 is depressed downward to form a receiving chamber 31. A plurality of tie bars 40 may be provided to penetrate the circular disk 30 and the plurality of annular disks 10 to fix the plurality of annular disks 10 and the circular disk 30 together.
The motor 20 is located in the containing cavity 31, the top of the motor is fixed to the casing 100, and specifically, the motor can be fixed to the internal frame 150 of the casing 100, the bottom of the motor extends to form a rotating shaft 21, the rotating shaft 21 is connected to the circular disk 30 to drive the circular disk 30 to rotate, so as to drive the plurality of annular disks 10 to rotate, so that the air boundary layer near the surface of the annular disks 10 is driven by the annular disks 10 to rotate from inside to outside due to the viscous effect to form laminar air.
As shown in fig. 2, the top of the guide member 200 (i.e., the top wall 210 thereof) is fixedly connected to the lower side of the circular plate 30 to rotate synchronously with the circular plate 30. The diversion member 200 and the laminar flow fan 300 share the same motor, so that the rotation of the diversion member 200 is not required to be controlled independently, and the phenomenon that the motor occupies too much space is avoided.
Fig. 6 is a schematic diagram of the blowing principle of the laminar flow fan. As shown in fig. 6, the blowing principle of the laminar flow fan is mainly derived from a "tesla turbine" found in nigula tesla. Tesla turbines mainly utilize the 'laminar boundary layer effect' or 'viscous effect' of the fluid to achieve the purpose of doing work on 'turbine disks'. The laminar flow fan drives the circular discs 30 through the motor 20 to drive the plurality of annular discs 10 to rotate at a high speed, air in the intervals of the annular discs 10 contacts and moves mutually, and an air boundary layer 13 close to the surfaces of the annular discs 10 is driven by the rotating annular discs 10 to rotate and move from inside to outside under the action of viscous shearing force tau to form laminar flow wind.
FIG. 7 is a schematic cross-sectional view of a plurality of annular disks of a laminar flow fan; fig. 8 is a schematic view of the air circulation of a laminar flow fan according to an embodiment of the present invention.
As shown in fig. 7 and 8, an air inlet passage 11 is formed at the center of the annular disk 10 to allow external air to enter. A plurality of air outlets 12 are formed in gaps between the plurality of annular disks 10 to allow laminar air to be blown out. The process of the laminar wind formed by the air boundary layer 13 rotating from inside to outside is centrifugal motion, so that the speed of the laminar wind leaving the air outlet 12 is higher than that of the laminar wind entering the air inlet channel 11.
In some embodiments, for any adjacent two annular disks 10, the inner circle diameter of the annular disk 10 located on the upper side is smaller than the inner circle diameter of the annular disk 10 located on the lower side. In other words, the inner circle diameter of the annular disk 10 is gradually reduced in the direction in which the air flow flows in the intake air passage 11 (or from bottom to top). Therefore, when air enters the air inlet channel 11 from bottom to top, the air flows at different positions in the radial direction respectively correspond to different annular disks 10, so that the air can flow to the annular disks more uniformly, the air is prevented from entering the annular disk at the upper side difficultly, and the effect of improving the air volume is finally achieved.
FIG. 9 is a schematic view of the air circulation of a laminar flow fan according to another embodiment of the present invention; FIG. 10 is a schematic diagram showing the relationship between the gradual change of the pitch of a plurality of annular disks and the air volume and the air pressure of a laminar flow fan.
In other embodiments, as shown in fig. 9, the distance between two adjacent annular disks 10 may be gradually increased from bottom to top. Or, the distance between two adjacent annular disks 10 is gradually increased along the direction of the air flow in the air inlet channel 11. The inventor finds that the arrangement can effectively improve the air volume of the laminar flow fan through a plurality of experiments.
The variation of the interval between the adjacent two annular disks 10 can be made the same. For example, the distances between two adjacent annular disks 10 in the 8 annular disks 10 may be sequentially set from bottom to top as follows: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm and 19.75mm, and the distance between two adjacent annular disks 10 is increased by 1mm from bottom to top.
In fig. 10, the abscissa axis shock uniform expansion Plate distance increment refers to the variation of the distance between two adjacent annular discs 10 along the direction from bottom to top, the left ordinate axis Mass flow rate refers to the air volume, the right ordinate axis Pressure refers to the air Pressure, and the air Pressure refers to the Pressure difference between the air outlet 12 and the air inlet 11 of the laminar flow fan. 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. 10 is a schematic diagram illustrating the relationship between the gradual change of the pitch of the plurality of ring disks 10 and the air volume and the air pressure when the outer diameter, the inner diameter, the number, the thickness of the ring disks 10 and the rotation speed of the motor 20 of the laminar flow fan are all kept constant. When all the above mentioned parameters are kept unchanged, in the plurality of annular disks 10, the distance between every two adjacent annular disks 10 gradually changes from bottom to top, which has a large influence on the air volume and a small influence on the air pressure. When the variation of the distance between two adjacent annular disks 10 along the direction from bottom to top, which is represented by the abscissa axis, is a positive number, it indicates that the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 gradually increases from bottom to top; when the variation of the spacing between two adjacent annular disks 10 along the direction from bottom to top, which is represented by the abscissa axis, is a negative number, it indicates that the spacing between every two adjacent annular disks 10 in the plurality of annular disks 10 gradually decreases from bottom to top. As can be seen from fig. 10, when the variation of the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 is-1 mm, 1mm and 2mm, the air volume and the air pressure of the laminar flow fan are both greatly improved. The air volume and the air pressure of the laminar flow fan are comprehensively considered, and the distance between every two adjacent annular disks 10 in the plurality of annular disks 10 is gradually increased from bottom to top. In an embodiment, the outer diameter of the ring disk 10 of the laminar flow fan is 175mm, the inner diameter of the ring disk 10 is 115mm, the number of the ring disks 10 is 8, the thickness of the ring disk 10 is 2mm, and the rotation speed of the motor 20 is 1000rpm (revolutions per minute), at this time, the air volume and the air pressure of the laminar flow fan are considered comprehensively, and the distance between two adjacent ring disks 10 in the 8 ring disks 10 can be set sequentially from bottom to top: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm and 19.75mm, namely, the distance between two adjacent annular disks 10 increases by 1mm from bottom to top.
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 (8)
1. A ceiling type air conditioner indoor unit, comprising:
the bottom of the shell is provided with an air inlet, and the side part of the shell is provided with at least one air supply outlet;
a heat exchanger disposed within the housing;
the fan is arranged in the shell and used for promoting indoor air to enter the shell from the air inlet, exchange heat with the heat exchanger and blow back the air into the room through the air supply outlet;
the flow guide part is arranged at the air inlet in a vertically-translating manner and is used for opening or closing the air inlet, when the air inlet is opened, indoor air is guided to flow to the air inlet through a gap between the outer peripheral surface of the flow guide part and the bottom surface of the shell, the size of the gap is convenient to adjust by translating to different positions, and the bottom surface of the flow guide part is upwards sunken to form a cavity; and
the driving mechanism is configured to controllably drive the diversion piece to translate up and down; and is
The fan is laminar flow fan, and it includes:
the annular disks are arranged in parallel at intervals and fixedly connected with each other, the axes of the annular disks extend along the vertical direction and are collinear, and the distance between every two adjacent annular disks is gradually increased from bottom to top for the annular disks; and
the motor is used for driving the plurality of annular discs to rotate, so that an air boundary layer close to the surfaces of the plurality of annular discs is driven by the plurality of annular discs to rotate and move from inside to outside due to a viscous effect to form laminar wind; and is
The drive mechanism includes:
one end of each pulling wire penetrates through the peripheral surface of the flow guide piece and extends into the cavity, the other end of each pulling wire is fixed to the bottom wall of the shell and is used for bearing the gravity of the flow guide piece, and when the flow guide piece is located at the lowest position, the connection point of each pulling wire and the flow guide piece is lower than the connection point of the pulling wire and the shell;
the driving motor is fixed in the cavity, and one end of each of the pulling wires is wound on a rotating shaft of the driving motor, so that the driving motor can wind the pulling wires through positive rotation, and the diversion piece is pulled to move upwards, or the pulling wires are released through reverse rotation, and the diversion piece moves downwards under the action of self gravity.
2. The indoor unit of a ceiling type air conditioner as claimed in claim 1, wherein
The outer peripheral surface of the flow guide piece is a conical guide surface which is gradually expanded from top to bottom in the radial direction and is used for guiding air to gradually flow upwards in a deflected mode so as to enter the air inlet.
3. The indoor unit of a ceiling type air conditioner as claimed in claim 2, wherein the indoor unit of a ceiling type air conditioner
The top surface and the bottom surface of the flow guide piece are both circular as a whole, and the circle centers of the flow guide piece and the bottom surface of the flow guide piece are positioned on the same vertical axis;
the outer peripheral surface of the flow guide member extends downward and radially outward from the peripheral edge of the top surface to the bottom surface to form the tapered guide surface.
4. The indoor unit of a ceiling type air conditioner as claimed in claim 3, wherein
The air inlet is circular;
the flow guide piece and the air inlet are coaxially arranged.
5. The indoor unit of a ceiling type air conditioner as claimed in claim 2, wherein the indoor unit of a ceiling type air conditioner
The bottom wall of the shell around the air inlet is a drainage surface which extends from the edge of the air inlet radially outwards and gradually extends downwards, so that an air channel for indoor air to enter the shell is defined by the bottom wall and the conical guide surface.
6. The indoor unit of a ceiling type air conditioner as set forth in claim 1, further comprising:
a vertically extending guide shaft located within the housing; and is
The guide part is telescopically arranged on the guide shaft up and down, so that the guide shaft limits the guide part to only translate up and down.
7. The indoor unit of a ceiling type air conditioner as claimed in claim 1, wherein
The whole body of the shell is rectangular, and the four side parts of the shell are respectively provided with the air supply outlet.
8. The indoor unit of a ceiling type air conditioner as claimed in claim 1, wherein
The heat exchanger is arranged between the fan and the air supply outlet and surrounds the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045461.3A CN111442376B (en) | 2019-01-17 | 2019-01-17 | Ceiling type air conditioner indoor unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045461.3A CN111442376B (en) | 2019-01-17 | 2019-01-17 | Ceiling type air conditioner indoor unit |
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| CN111442376A CN111442376A (en) | 2020-07-24 |
| CN111442376B true CN111442376B (en) | 2022-01-25 |
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| CN201910045461.3A Active CN111442376B (en) | 2019-01-17 | 2019-01-17 | Ceiling type air conditioner indoor unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113891622B (en) * | 2021-09-28 | 2022-11-01 | 珠海格力电器股份有限公司 | Air outlet device, control method and air conditioner |
| CN114791126B (en) * | 2022-04-28 | 2023-09-08 | 广东美的白色家电技术创新中心有限公司 | Ceiling machine |
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| CN111442376A (en) | 2020-07-24 |
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Effective date of registration: 20220111 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co., Ltd Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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