CN111779686A - Distributed air duct fan capable of expanding blowing area - Google Patents
Distributed air duct fan capable of expanding blowing area Download PDFInfo
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- CN111779686A CN111779686A CN202010617598.4A CN202010617598A CN111779686A CN 111779686 A CN111779686 A CN 111779686A CN 202010617598 A CN202010617598 A CN 202010617598A CN 111779686 A CN111779686 A CN 111779686A
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- duct
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- centrifugal fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a distributed air duct fan for expanding the blowing area, which is a fan assembly for generating air flow and comprises a centrifugal fan, an air duct separating device, a branch air duct-to-air outlet conversion device, an air outlet slit, a supplementary air flow opening and a centrifugal fan air suction opening. The distributed air duct fan with the expanded blowing area is a bladeless fan with small air resistance, so that the air pressure requirement of the fan is greatly reduced. The bladeless fan has the advantages of large air outlet quantity, low noise and greatly reduced energy consumption. Compared with the existing bladeless fan, the same wind field is formed in front of the fan, and the energy consumed by the distributed air channel fan with the expanded blowing area can be reduced to below 50%.
Description
Technical Field
The invention relates to the technical field of bladeless fans, in particular to a distributed air duct fan capable of expanding a blowing area.
Background
2 very important invention patents (application numbers CN200810177843.3 and CN200810177844.8) are already distributed between 9 and 11 months in 2008 of Dyson (Dyson) in the UK, a bladeless fan based on the Dyson invention patents has no exposed blades, the potential safety hazard caused by difficult cleaning of the blades and the exposed blades is solved, airflow with uniform speed is sprayed from an air outlet, and an air field formed in front of the fan is uniform. Such bladeless fans require the motor on the base to be able to generate both a large air volume and a high air pressure. In the description of its patent application No. CN200810177843.3, its embodiment requires that the air flow generated by the motor 22 through the nozzle 16 has a pressure of at least 400Pa (pascal) while its air volume needs to be above 20 liters/second, which is a high requirement for the fan.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The existing bladeless fan forcibly changes the running direction of airflow in a circular ring, so that higher air speed can be blown out only when the air pressure in the circular ring is higher, and large air volume and high air pressure can be generated at the same time only by increasing the rotating speed of a fan on a base and improving power. The rotation speed of the fan is a main factor influencing the noise of the fan, and meanwhile, a large amount of energy is wasted in the process of resisting high wind pressure by the fan and is not converted into effective wind energy. Theoretically, the wind energy generated by the fan can be expressed by the product of wind pressure and wind volume, and under the same power, in order to increase the wind volume, the wind pressure requirement must be reduced.
The invention adopts the distributed air channels to change the direction of the air flow, adjusts the distribution of the air flow, and reduces the air resistance of the air flow in the conversion process by optimizing the structure and the layout of the distributed air channels. After the air resistance is optimized, a smaller fan can be selected to achieve the same effect of the existing bladeless fan, so that the miniaturization of a product is facilitated, and the low noise of the product is facilitated. Similarly, if a fan with the same performance as a bladeless fan is adopted, the effects of larger air output and lower noise can be achieved. The distributed air duct fan generates the same air quantity and air speed, the requirement of the distributed air duct fan on the air pressure performance of a fan is much lower, compared with the existing bladeless fan, the same air field is formed in front of the fan, and the energy consumption of the distributed air duct fan for expanding the blowing area is reduced to below 50%.
Compared with the existing bladeless fan, the distributed air duct fan with the expanded blowing area has the biggest difference in appearance that the bladeless fan forms a ring, the middle of the bladeless fan is hollow, and the distributed air duct fan takes a centrifugal fan as the center and guides air to the edge or some local air outlets through a distributed air passage. That is, the fan according to the present invention is solid in the middle, and between the distributed air passages, there are some hollow portions as supplementary air flow openings, but the fan according to the present invention is solid as a whole. In addition, in the distributed air duct fan, the embedded fan is nested with other structures in structure, and structures such as a necessary base of other bladeless fans are not needed, so that the size of the equipment can be greatly reduced, and more application occasions are provided.
In some applications, it is desirable that the apparatus be small, but that the blowing area be enlarged. According to the distributed air duct fan with the expanded blowing area, the gap of the air outlet is expanded outwards along the axial direction of the fan, so that the blowing area can be increased, and the requirement can be met.
The invention provides a distributed air duct fan for expanding a blowing area, which is a fan assembly for generating air flow and comprises a centrifugal fan, an air duct separation device, an air duct, a supplementary air flow opening and a centrifugal fan air suction port, wherein the air duct separation device is arranged on the air duct;
the air duct is an independent air flow channel and comprises a branch air pipe, a branch pipe-to-air outlet conversion device corresponding to the branch air pipe, and a corresponding air outlet slit;
the channels operate independently, the air channels do not interfere with each other, and the optimization of the wind resistance is performed in a single air channel. The number of the air ducts is planned according to specific products and is not fixed.
The fan is named as a distributed air duct fan because the fan is composed of a plurality of air ducts and is distributed in all directions of the fan, and the purpose of the invention is to expand the blowing area, so the invention is the distributed air duct fan capable of expanding the blowing area.
Although the air ducts are operated independently and do not interfere with each other, some local areas may communicate with each other. For example, at the tail end of the air duct and at a position closer to the air outlet slit, the two independent air ducts can be fused together, and the influence on the overall performance of the fan is small.
The impeller of the mixed flow fan enables air to do centrifugal motion and axial motion, and the motion of the air in the fan mixes two motion modes of axial flow and centrifugation. When the air movement characteristic of the mixed flow fan is mainly centrifugal movement and assisted by axial movement, the same or even better effect of the centrifugal fan can be achieved. Because the characteristic that the centrifugal motion is mainly utilized, the fan of the fan can also adopt a mixed-flow fan.
The air flow is sucked from the air suction port of the fan, after passing through the centrifugal fan, the air flow is blown out from the periphery of the fan after turning at 60-90 degrees, enters each branch air pipe (3) through the flow guide of the air duct separating device, and finally passes through the air outlet conversion device and is sprayed out from the air outlet slit.
The centrifugal fan structurally comprises an air suction port, an impeller front disc, an impeller rear disc, an air outlet and a rotating part, and the centrifugal fan is characterized in that the centrifugal fan is used for enabling air flow to pass through a 60-90-degree turn and blow out from the periphery of the centrifugal fan. In addition, the centrifugal fan selected by the invention can be an open type centrifugal fan or a semi-closed type centrifugal fan, so that the cost is saved.
The centrifugal fan also comprises a mixed flow fan with air motion characteristics taking centrifugal motion as a main part and axial motion as an auxiliary part.
The centrifugal fan requires that the static pressure value of the fan is more than 60Pa (pascal) under the condition that the fan meets the target air volume, and the actual values of the air volume and the air pressure of the fan need to be designed according to the product requirements.
The centrifugal fan comprises a forward-inclined centrifugal fan, a backward-inclined centrifugal fan and a radial centrifugal fan, and the rotation direction of the centrifugal fan is not limited. The rotational direction of the centrifugal fan greatly affects the optimization of the wind resistance, thereby affecting the structure of the fan.
The centrifugal fan can control the size of the air speed of the air outlet slit by adjusting the speed of the fan, and is used for a fan needing to adjust the air speed.
The air duct separating device comprises an upper cover, a lower cover and an air duct separating and guiding device. The upper cover wraps the impeller front disc of the centrifugal fan from the upper surface, the lower cover wraps the impeller rear disc of the centrifugal fan from the lower surface, certain clearance is required for the upper cover to be away from the impeller front disc during wrapping, and certain clearance is required for the lower cover to be away from the impeller rear disc. The gap size is smaller, so that the centrifugal fan can rotate without mechanical obstacle, the air flow can flow in the fan, and the flow of the air flow reversely overflowed from the gap to the air suction port of the centrifugal fan is small.
The air duct separating and guiding device is arranged near an air outlet of the centrifugal fan and is used for separating two air ducts, and the position of the air duct separating and guiding device is determined according to the position of an outlet gap of the two air ducts of the guiding device and the outlet air volume of the two air ducts; in order to reduce the wind resistance, the initial direction of the flow guide device is basically the same as the wind direction of the air outlet of the centrifugal fan at the position, and the error is not more than 30 degrees; on the basis of the direction, the air channel transits to the side edge of the air channel through an arc or other curves; the two sides of the air duct flow guiding device belong to two different air ducts, and the two sides of the two air ducts are gradually separated from the initial positions through different curves to different air duct side edges.
The branch air pipe is used for restricting air to be sent to the air outlet conversion device through a pipeline; the branch air pipe needs to adopt the low windage design, can adopt the tuber pipe to gradually enlarge, and the tuber pipe diminishes gradually, and the tuber pipe is crooked, low windage designs such as water conservancy diversion piece.
The conversion from the branch air pipe to the air outlet is a structure for converting the shape and the size of the outlet of the branch air pipe to the air outlet slit. Because of the structural characteristics of narrow air outlet slit, bent air pipe, reduced width of the air pipe and lengthened length of the air pipe, the air resistance is large due to the fact that the air speed of the slit is fast; the most important requirement is to adopt an optimized wind resistance design to improve the performance of the fan, and the design is one of key structures for reducing the wind resistance in the whole distributed air duct fan.
The most important factor influencing the wind resistance is that the outlet wind speed of the air outlet slit is increased, the width of the outlet slit is increased, the requirement on the outlet wind speed can be reduced, and therefore the wind resistance is effectively reduced. Therefore, the width of the outlet gap is increased, which is an important measure for reducing the wind resistance.
The air outlet included angle of conversion from the branch air pipe to the air outlet is the included angle between the air outlet direction and the radial surface of the centrifugal fan, and in order to expand the blowing area, the air outlet included angle is smaller than 90 degrees, but larger than 30 degrees, otherwise, the air field formed by the fan needs a longer blowing distance to form an even air field.
Based on the fan, the wind field formed by the fan is controlled by designing a proper air outlet included angle, the requirements of various application occasions are met, and in the Darsen bladeless fan, the wind field formed by the fan is controlled through the coanda surface. On the basis of the structure, the coanda surface is added to control the wind field and is protected by the patent.
The air outlet slit is a long and thin slit, the slit comprises the characteristics of length, width, shape, direction and position, and a wind field in a specific direction and a specific area can be formed in front of the fan by combining a plurality of slits. The structure of the air outlet conversion device is the outlet from the branch air pipe to the air outlet conversion device.
The width of the air outlet slit is between 1mm and 5mm, the gap is smaller than 1mm, the requirement on the wind pressure characteristic of the fan is high, and if the gap is larger than 5mm, the requirement on the wind volume value of the fan is high. The length of the air outlet slit needs to consider the wind resistance performance of the branch air pipe converted into the slit, the complexity of the structural design and the like. The gap is too long, which usually causes uneven wind speed at different parts of the gap, and the gap is too short, which causes too many wind channels and complicated structure. The length of the gap will typically be below 150 mm.
The air outlet slits and the outlet slits of different air ducts are connected together and arranged into a chain. A fan may have 1 or more such outlet chains present, with the outlet direction of the same chain being the same, or changing direction in a stepwise manner.
The air outlet slit can be added with some grids in a slit, and the grids can play a role in guiding flow except for the appearance, so that air blowing is more uniform.
A supplementary airflow opening, according to bernoulli's principle: the faster the flow rate, the less the fluid pressure. Along with the high-speed airflow ejected out of the air outlet slit, the high-speed airflow generates negative pressure to attract surrounding air to move along, and the effect of air multiplication is achieved. If the supplementary airflow opening is not provided or the area of the supplementary airflow opening is insufficient, the airflow in the wind field formed by the front face of the fan is easy to draw close to the middle, so that the conditions that the central wind speed of the wind field formed by the fan is too strong and the edge is rapidly weakened are caused.
The supplementary airflow opening is mainly used for enabling the wind field formed by the fan to be uniform or to diffuse outwards; the effects also include: the weight of the fan, the fan shape, the peripheral installation and the like are reduced.
The supplementary air flow opening structure is a spare part between different air channels in the fan, and the front and the back of the fan are communicated.
The supplementary air flow openings are not formed among all the air channels, and the supplementary air flow openings are small or even nonexistent in some local places due to narrow space.
The structure of centrifugal fan induction port is used for the resistance of centrifugal fan entry, and in addition, centrifugal fan induction port parcel holds the impeller front bezel, and the clearance is very little, also can reduce the impeller export and reverse the air mass flow who spills over to centrifugal fan induction port. In some cases, especially where the flow of air at the inlet of the centrifugal fan is not large, the structure of the centrifugal fan suction port for optimizing the resistance of the inlet of the fan may not be needed.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the distributed air duct fan with the expanded blowing area is a bladeless fan with small air resistance, so that the air pressure requirement of the fan is greatly reduced. The bladeless fan has the advantages of large air outlet quantity, low noise and greatly reduced energy consumption. Compared with the existing bladeless fan, the same wind field is formed in front of the fan, and the energy consumed by the distributed air channel fan with the expanded blowing area can be reduced to below 50%.
Other advantages, objects, and features of the distributed duct fan for expanding a blowing area of the present invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the present invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1: the invention discloses a fan back structure schematic diagram.
FIG. 2: the invention discloses a fan with a front structure.
FIG. 3: the invention relates to a fan sectional view.
Wherein: the air conditioner comprises a centrifugal fan 1, an air duct 2, an air duct separating device 3, a branch air duct 4, a branch to air outlet converting device 5, an air outlet slit 5, a supplementary air flow opening 6, an air duct 2-1, an air duct separating device upper cover, an air duct 2-2, an air duct separating device lower cover, an air duct 2-3, an air duct separating and guiding device and an air outlet included angle from the branch air duct 4-1 to the air outlet converting device.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The invention provides a distributed air duct fan with an expanded blowing area, which is a fan assembly for generating air flow, the fan assembly can complete the basic functions of the fan, and all fans adopting the assembly provided by the invention as a component or a component combination are within the protection scope of the invention. In addition, this embodiment is only one embodiment according to the present invention, and not all embodiments are listed.
As shown in fig. 1, 2 and 3, a distributed air duct fan with an expanded blowing area is composed of a centrifugal fan 1, an air duct separating device 2, a branch air duct 3, a branch air duct-to-air outlet conversion device 4, an air outlet slit 5 and a supplementary air flow opening 6.
The air duct is an independent air flow channel and comprises a branch air duct 3, a branch air duct-to-air outlet conversion device 4 corresponding to the branch air duct, and a corresponding air outlet slit 5. The channels operate independently and do not interfere with each other.
The air flow channels inside the air duct are connected and can be structurally regarded as a single entity.
In the fan of this embodiment, there are 16 air ducts, as shown in fig. 1 and 2, including 16 branch air ducts 3, 16 branch air ducts to air outlet conversion devices 4, and 16 air outlet slits 5.
The centrifugal fan 1 is placed in the middle of the whole fan, the air flow is sucked from the inlet of the centrifugal fan in the flowing direction, after passing through the centrifugal fan, the air flow is turned by 90 degrees, is blown out from the periphery of the centrifugal fan, enters the branch pipelines 3 of each air passage through the flow guide of the air channel separation device 2, and finally is sprayed out from the air outlet slit 5 through the air outlet conversion device 4.
Except for the centrifugal fan 1, other components are a functional logic structure and not a separate entity structure, the air outlet slits 5 are not an entity, but the arrangement of the air outlet slits is the core function of the fan, so that the arrangement needs to be listed particularly.
Each air duct consists of a rear shell, a front shell and two air duct walls. The position and shape of the front shell, the rear shell and the duct wall of each duct are calculated by wind resistance optimization, and the position and shape can be observed from fig. 1 and 2. The rear shell and the front shell of the air duct are logically independent, but physically, the front shells of all the air ducts are connected together as a whole; the back shells of all the air ducts are connected together as a whole, and meanwhile, the two side walls of the air ducts are also structurally molded with the back shells in an injection mode. The front shell and the rear shell are provided with openings at the positions for supplementing air flow openings, the front shell is provided with 4 screw holes at the position for installing the centrifugal fan and is provided with an opening for leading out a control line of the centrifugal fan. The back shell is arranged above the air suction port of the centrifugal fan and is provided with an opening which is slightly larger than the air suction port of the centrifugal fan. At the position from the branch pipe to the air outlet switching device 4, as shown in fig. 3, the front shell and the rear shell are required to make a turn, and the angle of the turn is 4-1 from the branch pipe to the air outlet of the air outlet switching device. In this example, the turning radius of the front shell is 19mm, the turning radius of the rear shell is 45mm, and the included angle of the air outlet is 60 degrees, which is beneficial to expanding the air blowing area.
Noise control and wind resistance control are comprehensively considered, the thicknesses of the front shell and the rear shell are 2mm, and the thickness of the side wall of the air channel is 2 mm.
The whole fan can be structurally divided into a front shell, a rear shell and a centrifugal fan.
The centrifugal fan is arranged in the middle of the front shell through a screw hole in the front shell, and the hole is sealed through dispensing after a control line of the centrifugal fan is led out. Then the front shell and the rear shell are assembled together through a buckle and a screw, and the gap between the front shell and the rear shell after assembly in front of the fan is the air outlet slit 5. After the centrifugal fan is electrified, the fan can work, wind is sucked from the opening in the middle of the rear shell, namely the air suction opening of the centrifugal fan, and is sprayed out from the air outlet slit 5, and finally, a uniformly diffused wind field is formed in front of the fan.
In this example, a closed forward-inclined centrifugal fan is adopted, without a volute, with an impeller front disk and an impeller rear disk structure. The centrifuge rotates clockwise, seen in the direction of the back shell. The maximum wind pressure is 579Pa, and the maximum wind volume is 51 liters/second.
In this example, 16 branch air duct guiding devices 2-3 are designed, the starting positions of the branch air duct guiding devices are located on a circular ring at the position of 5mm of the centrifugal fan air outlet, the included angle between the starting point of the first air duct guiding device and the horizontal line is 25 °, the included angle between the air outlet direction of the centrifugal fan at the position and the tangential direction of the circular ring at the position is 25 °, the starting point of each subsequent air duct guiding device is located on the circular ring, and the included angle between the air outlet direction of the centrifugal fan at the positions and the tangential direction of the circular ring at the position is 25 ° every 22.5 °.
In this example, as shown in fig. 2, the width of the air outlet slits is 3.2mm, the length of each air outlet slit is 69mm, the interval between the slits is 1.5mm, the arrangement of the slits is circular, and the diameter of the circular ring is 360 mm.
In this example, there are 16 make-up airflow openings in total.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A distributed air channel fan for expanding the blowing area is a fan assembly for generating air flow and comprises a centrifugal fan (1), an air channel separation device (2), a branch air pipe (3), a branch pipe-to-air outlet conversion device (4), an air outlet slit (5), a supplementary air flow opening (6) and a centrifugal fan air suction opening (7);
the air channel is an independent air flow channel and comprises a branch air pipe (3), a branch pipe-to-air outlet conversion device (4) corresponding to the branch air pipe, and a corresponding air outlet slit (5). The channels operate independently, the air channels do not interfere with each other, and the optimization of the wind resistance is carried out in a single air channel; under the condition of little influence on the overall performance of the fan, some local places among the air channels can be communicated;
the air flow is sucked from an air suction port (7) of the centrifugal fan, after passing through the centrifugal fan, the air flow is radially blown out from the periphery of the centrifugal fan after turning by 60-90 degrees, enters each branch air pipe (3) through the flow guide of the air duct separating device (2), and finally passes through the air outlet conversion device (4) and is sprayed out from the air outlet slit (5).
2. The distributed air duct fan with the expanded blowing area according to claim 1, wherein the centrifugal fan (1) does not need a volute structure because the centrifugal fan is required to make airflow pass through a 90-degree turn and the airflow is radially blown out from the periphery of the centrifugal fan; and when the target air volume is met, the static pressure value of the centrifugal fan is more than 60P (pascal).
3. The distributed duct fan with the expanded blowing area of claim 1, wherein the duct separating device (2) structurally comprises an upper cover 2-1, a lower cover 2-2 and a duct guiding device 2-3.
4. The distributed air duct fan with the expanded blowing area according to claim 3, wherein the upper cover (2-1) covers the impeller front disk of the centrifugal fan (1) from above, and the lower cover (2-2) covers the impeller rear disk of the centrifugal fan (1) from below, and when the fan is used for covering, a certain gap is required between the upper cover and the impeller front disk, and a certain gap is required between the lower cover and the impeller rear disk; the air duct guiding device (2-3) is a part which is near an air outlet of the centrifugal fan and separates two air ducts, and the position of the air duct guiding device is determined according to the position of an outlet gap of the two air ducts of the guiding device and the outlet air quantity of the two air ducts; in order to reduce the wind resistance, the direction of the flow guide device is basically the same as the wind direction of the air outlet of the centrifugal fan at the position, and the error is not more than 30 degrees; on the basis of the direction, the air duct passes through a circular arc or other curves to the side edge of the air duct. The two sides of the air duct guiding device (2-3) belong to two different air ducts, and the two sides of the two air ducts are gradually separated from the initial positions through different curves to different air duct side edges.
5. The distributed duct fan with an extended blowing area of claim 1, wherein: the branch air pipe (3) is used for restricting air to be sent to the air outlet conversion device (4) through a pipeline; the branch air pipe (3) needs to adopt a low-wind-resistance design, and can refer to low-wind-resistance design methods such as gradual expansion of the air pipe, gradual reduction of the air pipe, bending of the air pipe, flow deflectors and the like.
6. The distributed duct fan with an extended blowing area of claim 1, wherein: the air outlet slit (5) is a slender slit with the width of 1mm-5 mm; the length is below 150 mm; one or more grids can be contained in one slit, and the grids can play a role in flow guiding besides the appearance role, so that the air blowing is more uniform; the outlet slits of the plurality of air ducts are connected together and arranged into a chain, and the number of the chains can be one or more according to the design requirement.
7. The distributed duct fan with an extended blowing area of claim 1, wherein: the conversion device (4) from the branch air pipe to the air outlet is a structure for converting the shape and the size of the outlet of the branch air pipe into the air outlet slit (5); an air outlet included angle (4-1) of the conversion (4) from the branch air pipe to the air outlet is an included angle between the air outlet direction and the radial surface of the centrifugal fan, and in order to expand the blowing area, the air outlet included angle is smaller than 90 degrees and larger than 30 degrees; different outlet slit chains can be designed into the same air outlet included angle (4-1) to blow air obliquely, and the blowing area is expanded through the shaking function.
8. The distributed duct fan with an extended blowing area of claim 1, wherein: the supplementary airflow opening (6) is mainly used for preventing the situation that the central wind speed of a wind field formed by the fan is too strong and the edge of the wind field is rapidly weakened; the effects also include: the weight of the fan is reduced, the fan is shaped and the fan is installed externally, and structurally, the fan is a spare part between different air channels in the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617598.4A CN111779686A (en) | 2020-06-30 | 2020-06-30 | Distributed air duct fan capable of expanding blowing area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010617598.4A CN111779686A (en) | 2020-06-30 | 2020-06-30 | Distributed air duct fan capable of expanding blowing area |
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| CN111779686A true CN111779686A (en) | 2020-10-16 |
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| CN202010617598.4A Pending CN111779686A (en) | 2020-06-30 | 2020-06-30 | Distributed air duct fan capable of expanding blowing area |
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| CN (1) | CN111779686A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113048078A (en) * | 2021-04-06 | 2021-06-29 | 株洲中车时代电气股份有限公司 | Forced air cooling heat dissipation device and design method thereof |
| CN114226965A (en) * | 2021-12-28 | 2022-03-25 | 辽宁工业大学 | Purification protection device of laser engraving machine |
| CN115365227A (en) * | 2022-08-18 | 2022-11-22 | 浙江省海洋水产研究所 | Rotation type fishhook cleaning device is angled to hairtail longline |
| CN116833093A (en) * | 2023-04-27 | 2023-10-03 | 廊坊德基机械科技有限公司 | Air distribution mechanism and machine-made sand powder removing mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048078A (en) * | 2021-04-06 | 2021-06-29 | 株洲中车时代电气股份有限公司 | Forced air cooling heat dissipation device and design method thereof |
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| CN114226965A (en) * | 2021-12-28 | 2022-03-25 | 辽宁工业大学 | Purification protection device of laser engraving machine |
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| CN115365227A (en) * | 2022-08-18 | 2022-11-22 | 浙江省海洋水产研究所 | Rotation type fishhook cleaning device is angled to hairtail longline |
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| CN116833093A (en) * | 2023-04-27 | 2023-10-03 | 廊坊德基机械科技有限公司 | Air distribution mechanism and machine-made sand powder removing mechanism |
| CN116833093B (en) * | 2023-04-27 | 2024-03-26 | 廊坊德基机械科技有限公司 | Air distribution mechanism and machine-made sand powder removing mechanism |
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Application publication date: 20201016 |