CN113586472B - Cross-flow fan - Google Patents

Abstract

The invention relates to the technical field of fans, in particular to a cross-flow fan. The invention aims to solve the technical problem that the existing cross-flow fan is poor in air inlet effect. To this end, the invention provides a cross-flow fan comprising: the fan shell is provided with an air inlet, and the air inlet side and the leeward side of the air inlet are respectively provided with a volute tongue plate and a back air plate; the air duct plate is arranged towards the air inlet, and is provided with a first air inlet duct which is positioned on one side of the volute tongue plate and communicated with the air inlet, and a second air inlet duct which is positioned on one side of the back air plate and communicated with the air inlet. According to the cross flow fan, the air channels are arranged on the air inlet side and the leeward side of the air inlet, so that the effect of dual-channel directional heat dissipation is achieved, specifically, the air channel plate is arranged facing the air inlet of the cross flow fan and can collect air, the first air inlet channel and the second air inlet channel are arranged on the air channel plate and can achieve the effect of directional air inlet, and meanwhile, the air exhaust phenomenon of the cross flow fan on the leeward side is reduced.

Description

Cross-flow fan

Technical Field

The invention relates to the technical field of fans, in particular to a cross-flow fan.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

As shown in fig. 1, among various heat dissipating devices, a perfusion exhaust fan 100' is widely selected due to large air volume and low cost. In the heat dissipation scheme, the perfusion exhaust fan 100' is often matched with 1 air suction duct and 1 exhaust duct, so as to generate a coherent air flow, and heat is taken away by the coherent air flow.

Although the conventional perfusion exhaust fan 100 'can basically achieve the purpose of heat dissipation, in the practical application process, the conventional perfusion exhaust fan 100' still has the following defects: when the existing technical scheme selects the perfusion exhaust fan 100', only 1 air suction duct and 1 exhaust duct are designed, multi-channel directional heat dissipation cannot be performed, specifically, wind enters the perfusion exhaust fan 100' from the position of the vortex tongue 20', and meanwhile, part of the wind leaks from the position of the backboard 10', so that the heat dissipation performance of the perfusion exhaust fan 100' cannot be effectively improved.

Disclosure of Invention

The invention aims to solve the technical problem of poor air inlet effect of the traditional cross-flow fan at least to a certain extent.

In order to achieve the above object, the present invention provides a cross flow fan, including: the fan shell is provided with an air inlet, and the air inlet side and the leeward side of the air inlet are respectively provided with a volute tongue plate and a back air plate; the air duct plate is arranged towards the air inlet, and is provided with a first air inlet duct which is positioned on one side of the volute tongue plate and communicated with the air inlet, and a second air inlet duct which is positioned on one side of the back air plate and communicated with the air inlet.

According to the cross flow fan, the air channels are arranged on the air inlet side and the leeward side of the air inlet, so that the effect of dual-channel directional heat dissipation is achieved, specifically, the air channel plate is arranged facing the air inlet of the cross flow fan and can be used for collecting air, the first air inlet channel and the second air inlet channel are arranged on the air channel plate and can be used for achieving the effect of directional air inlet, and meanwhile, the air exhaust phenomenon of the cross flow fan on the leeward side of the air inlet is reduced.

In addition, the cross-flow fan according to the invention can also have the following additional technical characteristics:

according to one embodiment of the invention, the air duct plate is provided with an air collecting groove matched with the air inlet, and the air inlet end of the vortex tongue plate and the air inlet end of the back air plate extend into the air collecting groove.

According to one embodiment of the present invention, the wind gathering tank includes a first groove portion communicating with the first wind inlet duct, and a second groove portion communicating with the second wind inlet duct.

According to one embodiment of the invention, the air inlet end of the whirlpool tongue plate is higher than the air inlet end of the lee plate, and the depth of the first groove part is smaller than the depth of the second groove part.

According to one embodiment of the invention, the bottom of the wind gathering trough is provided with a transition slope dividing the first groove portion and the second groove portion.

According to one embodiment of the invention, a fan impeller arranged close to the air inlet is arranged in the fan shell, and the transition slope is positioned right below the center axis of the fan impeller.

According to one embodiment of the invention, the central angle of the air inlet around the fan impeller is more than 0 and less than 180 degrees.

According to one embodiment of the invention, the air duct plate is provided with a first air inlet duct communicated with the first groove part, and a first air inlet duct is formed inside the first air inlet duct.

According to one embodiment of the invention, the air duct plate is provided with a second air inlet duct communicated with the second groove part, a second air inlet duct is formed inside the second air inlet duct, and a butt joint area of the first air inlet duct and the second air inlet duct forms an air collecting groove.

According to one embodiment of the invention, the cross-flow fan further comprises an exhaust cylinder which is arranged at the top of the first air inlet cylinder and is communicated with the fan impeller, and the exhaust cylinder is connected with the exhaust end of the volute tongue plate.

According to one embodiment of the invention, one end of the volute tongue plate, which is far away from the air inlet, forms an air exhaust end positioned in the air exhaust barrel, and the air exhaust end is provided with an air exhaust notch matched with the air exhaust barrel.

According to one embodiment of the invention, the volute tongue plate is slidably mounted on the fan shell along the circumferential direction of the fan impeller, and the size of the air inlet can be adjusted in a manner of sliding along the circumferential direction.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic diagram of a perfusion exhaust fan in the prior art;

FIG. 2 is a first isometric view of a cross-flow fan according to one embodiment of the present invention;

FIG. 3 is a schematic view of a flow through fan according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of an air inlet of a cross-flow fan according to an embodiment of the present invention;

FIG. 5 is a schematic view of a duct board according to an embodiment of the present invention;

FIG. 6 is a schematic view of the structure of a whirlpool tongue plate according to an embodiment of the present invention;

FIG. 7 is a schematic view of the structure of a back air plate according to an embodiment of the invention;

FIG. 8 is a second axial view of a cross-flow fan according to one embodiment of the present invention;

FIG. 9 is a schematic structural view of an RH type cross-flow fan according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a RL-type cross-flow fan according to an embodiment of the invention;

fig. 11 is a schematic structural diagram of an R-type cross flow fan according to an embodiment of the present invention.

Wherein, the reference numerals are as follows:

100', a perfusion exhaust fan;

10', a back plate;

20', volute tongue;

100. a cross flow fan;

10. a back wind plate; 11. a diversion eave;

20. a whirlpool tongue plate; 21. an exhaust notch; 22. a mounting foot; 23. a flanging structure;

30. a fan impeller;

41. a first air inlet barrel; 42. a second air inlet barrel; 421. a partition plate;

50. an exhaust duct;

60. an air duct plate; 61. a wind gathering groove; 611. a first groove portion; 612. a second groove portion; 613. and (5) a transition slope.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, the technical solution of the present invention is described by the through-flow fan only as a preferred embodiment of the present invention, and is not a limitation on the application range of the technical solution of the present invention, for example, the technical solution of the present invention may also be a fan with other similar structures, and the adjustment belongs to the protection range of the technical solution of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" and "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

For ease of description, spatially relative terms, such as "end," "outer," "bottom," "upper," "back," "side," "axial," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

It should be noted that, in the embodiments of the present application, the "air inlet side" and the "lee side" are both referred to as "air inlet side" at the air inlet of the cross-flow fan 100 and on the side upstream of the rotation of the fan impeller 30, and the "lee side" at the air inlet of the cross-flow fan 100 and on the side downstream of the rotation of the fan impeller 30, with respect to the rotation direction of the fan impeller 30 in the cross-flow fan 100.

As shown in fig. 2 to 4, according to an embodiment of the present application, the present invention provides a cross flow fan 100, where the cross flow fan 100 includes a fan housing and an air duct board 60, the fan housing is provided with an air inlet, an air inlet side and a leeward side of the air inlet are respectively provided with a volute tongue plate 20 and a leeward plate 10, the air duct board 60 is disposed facing the air inlet, and a first air inlet duct located at one side of the volute tongue plate 20 and communicating with the air inlet, and a second air inlet duct located at one side of the air backing plate 10 and communicating with the air inlet are formed on the air duct board 60.

In this embodiment, a fan impeller 30 located at an air inlet is disposed in a fan housing, a leeward plate 10 extends along a circumferential direction of the fan impeller 30 and is located at a leeward side of the fan impeller 30, a volute tongue plate 20 extends along a circumferential direction of the fan impeller 30 and is located at an air inlet side of the fan impeller 30, a gap between the volute tongue plate 20 and the leeward plate 10 forms the air inlet of the cross-flow fan 100, and air channels are disposed on the air inlet side and the leeward side of the air inlet of the cross-flow fan 100, so that a dual-channel directional heat dissipation effect is achieved.

Specifically, the cross-flow fan 100 further includes two end plates located at two axial ends of the fan impeller 30, the leeward plate 10 is disposed between the two end plates, the vortex tongue plate 20 is disposed between the two end plates and extends along a circumferential direction of the fan impeller 30 toward the leeward plate 10, a gap between the vortex tongue plate 20 and the leeward plate 10 forms an air inlet of the cross-flow fan 100, and the leeward plate 10 and the vortex tongue plate 20 are vertically disposed with respect to the air duct plate 60, so that the back air plate 10, the vortex tongue plate 20 and the two end plates enclose an impeller chamber which is independently disposed with respect to an exhaust channel, and a bending transition region between air inlet and exhaust is realized through the impeller chamber, so that phenomena of mutual mixing and turbulence between air inlet and exhaust are reduced. Meanwhile, the vortex tongue plate 20 is vertically arranged relative to the exhaust channel, so that the air inlet of the cross flow fan 100 can be reduced and the air outlet of the cross flow fan 100 can be increased by adjusting the vortex tongue plate 20, and the purposes of increasing the negative pressure of the air inlet and reducing the noise of the air outlet can be achieved.

As shown in fig. 2 to 4, according to the embodiment of the present application, the air duct plate 60 is provided with an air collecting groove 61 matched with the air inlet, and the air inlet end of the volute tongue plate 20 and the air inlet end of the leeward plate 10 extend into the air collecting groove 61.

In this embodiment, the air collecting groove 61 may be formed by stamping the air duct plate 60, or may be formed by surrounding an external housing or a wind shield, the air collecting groove 61 may perform an air collecting function at the air inlet of the through-flow fan 100, and air in the air collecting groove 61 may be sucked into the impeller chamber under the negative pressure of the fan impeller 30, and then discharged through the air outlet of the through-flow fan 100, so as to achieve the purpose of heat dissipation.

As shown in fig. 2 to 4, according to an embodiment of the present application, the wind gathering tank 61 includes a first groove portion 611 communicating with the first wind inlet duct, and a second groove portion 612 communicating with the second wind inlet duct.

In this embodiment, considering that the negative pressure on the air intake side and the negative pressure on the lee side of the cross flow fan 100 are different, the embodiments of the present application propose the first groove portion 611 and the second groove portion 612 for the negative pressures on the two sides that are different, and the first groove portion 611 and the second groove portion 612 are independent from each other, so as to reduce the mutual interference between the air intake side and the lee side.

Specifically, the fan impeller 30 is configured as a cylindrical structure, the volute tongue plate 20 and the back wind plate 10 are configured as elongated plate structures extending along the axial direction and the circumferential direction of the fan impeller 30, the air inlet enclosed between the volute tongue plate 20 and the back wind plate 10 is configured as a rectangular structure distributed along the axial direction of the fan impeller 30, correspondingly, the air collecting groove 61, the first groove portion 611 and the second groove portion 612 are configured as rectangular structures corresponding to the air inlet, and the air inlet, the air collecting groove 61, the first groove portion 611 and the second groove portion 612 are configured as rectangular structures, so that the air suction area of the cross-flow fan 100 can be improved, and the air intake and the heat dissipation efficiency of the cross-flow fan 100 can be improved.

As shown in fig. 2 and 5, according to an embodiment of the present invention, the air inlet end of the whirlpool plate 20 is higher than the air inlet end of the leeward plate 10, and the depth of the first groove portion 611 is smaller than the depth of the second groove portion 612.

In this embodiment, considering that the negative pressure on the air intake side of the cross flow fan 100 is greater than the negative pressure on the leeward side, in order to reduce the exhaust phenomenon of the cross flow fan 100 on the leeward side, the embodiment of the present application proposes to set the depth of the second groove portion 612 that communicates with the leeward side to be greater than the depth of the first groove portion 611 that communicates with the air intake side, so that the interior of the second groove portion 612 can gather enough air, and under the negative pressure effect on the leeward side, the air gathered in the second groove portion 612 can be sucked into the interior of the cross flow fan 100, and at the same time, the exhaust phenomenon of the air in the first groove portion 611 flowing into the second groove can be reduced.

As shown in fig. 2 and 5, according to an embodiment of the present invention, the bottom of the wind gathering tank 61 is provided with a transition slope 613 dividing the first groove portion and the second groove portion.

In this embodiment, by setting the transition slope 613 between the first groove portion and the second groove portion, air in the air collecting groove 61 can flow between the first groove portion and the second groove portion through the transition slope 613, so as to compensate for the phenomenon that the air intake side or the leeward side is insufficient, and further, when the leeward side is exhaust due to the insufficient air amount, the air on the air intake side can be timely supplemented to the leeward side, so as to slow down the exhaust phenomenon on the leeward side.

As shown in fig. 2, 3 and 5, according to one embodiment of the present invention, a fan impeller 30 disposed near the air inlet is disposed in the fan housing, and a transition slope 613 is located directly below the center of the fan impeller 30.

In this embodiment, the air inlet of the cross flow fan 100 is divided into an air inlet side and a leeward side by taking the center axis of the fan impeller 30 as a boundary, and similarly, the air collecting groove 61 is divided into a first groove 611 and a second groove 612 by taking the center axis of the fan impeller 30 as a boundary, and the transition slope 613 is also located right below the center axis of the fan impeller 30, so as to achieve the purpose of completely dividing the air inlet side and the leeward side, and reduce the phenomenon that air or air flows on both sides interfere with each other.

As shown in fig. 2 and 4, according to an embodiment of the present invention, the central angle of the air inlet around the fan wheel 30 is greater than 0 and less than 180 °.

In this embodiment, the through-flow fan 100 provided by the invention reasonably designs the area of the air inlet around the fan impeller 30 through the back air plate 10 and the volute tongue plate 20, so that the air inlet can generate proper negative pressure, thereby reducing the air exhaust phenomenon of the air inlet on one side of the back air plate 10, and simultaneously reducing noise caused by the reduction of the air inlet as much as possible. Specifically, the cross-flow fan 100 of the present invention can be applied to various heat dissipation systems, and can significantly improve the heat dissipation performance of the whole heat dissipation system with less cost, and meanwhile, the structural design set forth in the present invention can also effectively guide the design of the air inlets of other fan housings, and the matching design of the cross-flow fan 100 and the air duct board 60 and other structural devices, so that the cross-flow fan 100 can maintain high performance in the heat dissipation system and has low noise and good use experience.

As shown in fig. 2 and 3, according to an embodiment of the present invention, a first air inlet duct 41 communicating with the first groove portion 611 is provided on the duct plate 60, and a first air inlet duct is formed inside the first air inlet duct 41.

In this embodiment, the first air inlet duct 41 can perform the functions of air collection and directional air supply, the air outlet of the first air inlet duct 41 is communicated with the air inlet of the through-flow fan 100 on the side of the volute tongue plate 20, the first air inlet duct 41 is set to be of a slope structure, and the section of the first air inlet duct 41 is gradually increased along the direction close to the through-flow fan 100, so that the air suction performance of the first air inlet duct 41 and the butt joint efficiency with the through-flow fan 100 are improved.

As shown in fig. 2 and 3, according to an embodiment of the present invention, the duct plate 60 is provided with the second air inlet duct 42 communicating with the second groove portion 612, the second air inlet duct is formed inside the second air inlet duct 42, and the abutting region of the first air inlet duct 41 and the second air inlet duct 42 forms the air collecting duct 61.

In this embodiment, the second air inlet duct 42 can perform the functions of air collection and directional air supply, the air outlet of the second air inlet duct 42 is communicated with the air inlet of the through-flow fan 100 on the leeward plate 10 side, the second air inlet duct 42 is provided with a rectangular duct structure, the inlet and the outlet of the second air inlet duct 42 are both provided with flaring structures, and the flaring structures extend out of the air duct plate 60 and are folded upwards, so that the air suction performance of the second air inlet duct 42 and the butt joint efficiency with the through-flow fan 100 are improved.

As shown in fig. 8, a partition plate 421 extending along the wind flow direction is disposed in the second wind inlet duct 42, the partition plate 421 partitions the second wind channel in the second wind inlet duct 42, so as to achieve the purpose of splitting, and correspondingly, a partition protrusion extending along the wind flow direction is disposed in the second groove 612, so as to achieve the purpose of splitting at the air inlet. Further, the second air inlet duct 42 and the first air inlet duct 41 are respectively located at two opposite sides of the cross-flow fan 100, so as to achieve the purpose of simultaneously carrying out air suction in two directions.

In addition, the air duct board 60 is provided with a groove structure in the coverage area of the second air inlet duct 42, and the ventilation amount of the second air inlet duct 42 can be improved through the groove structure, so that the second air inlet duct 42 can provide enough air for the air inlet on the leeward board 10 side. The top of the second air inlet duct 42 is provided with a mounting groove and a hook at a position corresponding to the groove structure, and external electric components can be mounted to the top of the second air inlet duct 42 through the mounting groove and the hook.

As shown in fig. 2 and 3, according to an embodiment of the present invention, the cross-flow fan 100 further includes an exhaust duct 50 disposed at the top of the first air intake duct 41 and communicating with the fan impeller 30, and the exhaust duct 50 is connected with the exhaust end of the volute tongue plate 20.

In this embodiment, the back air plate 10 and the vortex tongue plate 20 are vertically arranged in the air exhaust duct 50, so that the back air plate 10, the vortex tongue plate 20 and the two end plates can form an impeller chamber which is independently arranged relative to the air exhaust channel, and a bending transition area between air intake and air exhaust is realized through the impeller chamber, so that the phenomenon that the air intake and the air exhaust are mixed and disturbed with each other is reduced. Meanwhile, the vortex tongue plate 20 is vertically arranged relative to the exhaust channel, so that the air inlet of the cross flow fan 100 can be reduced and the air outlet of the cross flow fan 100 can be increased by adjusting the vortex tongue plate 20, and the purposes of increasing the negative pressure of the air inlet and reducing the noise of the air outlet can be achieved.

Specifically, the first air inlet duct 41 and the air outlet duct 50 are both provided with slope structures, and the cross sections of the first air inlet duct 41 and the air outlet duct 50 are gradually increased along the direction approaching the through-flow fan 100, so that the space occupied by the first air inlet duct 41 and the air outlet duct 50 is reduced. Further, an air inlet groove is formed in the air duct plate 60 at the inlet position of the first air inlet duct 41, a groove corresponding to the air inlet groove in the air duct plate 60 is formed in the inlet position of the air exhaust duct 50, and the first air inlet duct 41 and the air exhaust duct 50 are separated from each other by a partition plate which is approximately attached to the air duct plate 60.

As shown in fig. 6, according to one embodiment of the present invention, the end of the whirlpool tongue 20 away from the air inlet forms an air exhaust end located in the air exhaust duct 50, and the air exhaust end is provided with an air exhaust notch 21 matched with the air exhaust duct 50.

In this embodiment, on the premise that the volute tongue plate 20 is close to the fan impeller 30, the point (the air inlet end of the volute tongue plate 20) closest to the fan impeller 30 on the volute tongue plate 20 is lifted, so that the purposes of reducing the air inlet and increasing the negative pressure and the suction at the air inlet are achieved. Meanwhile, the lowest point (the exhaust end of the volute tongue plate 20) of the volute tongue plate 20, which determines the effective area of the air exhaust barrel 50, is lifted, so that the flapping area of wind to the volute tongue plate 20 during air exhaust is reduced, the purposes of reducing the air exhaust pressure and the air exhaust noise are achieved, and the technical effects of high performance and low noise of the cross-flow fan 100 are achieved.

As shown in fig. 6, according to an embodiment of the present invention, the air inlet end of the volute tongue plate 20 is provided with a burring structure 23 that cooperates with the air inlet flow, and the burring structure 23 is bent outward in the radial direction of the fan wheel 30.

In this embodiment, the flanging structure 23 can guide the wind at the air inlet end of the volute tongue plate 20, so that the wind at the air inlet end of the volute tongue plate 20 can smoothly flow to the air inlet of the through-flow fan 100, and wind resistance and noise caused by wind resistance are reduced. Specifically, the flanging structure 23 may be configured as a bending plate or an arc plate, and the flanging structure 23 and the volute tongue plate 20 cooperate to reduce the influence on wind resistance while reducing the wind inlet. Further, as shown in fig. 7, in order to improve the air intake effect of the cross flow fan 100, a diversion eave 11 is further provided on the leeward plate 10 of the cross flow fan 100.

As shown in fig. 6, according to one embodiment of the present invention, two mounting feet 22 are provided at both ends of the exhaust port 21, and the whirlpool tongue 20 is mounted to two end plates by a burring structure 23 and/or the two mounting feet 22.

In this embodiment, the volute tongue plate 20 is installed on two end plates through the flanging structure 23 and/or the two installation legs 22, so that the stability of the volute tongue plate 20 in a wind field can be improved, deformation or movement phenomenon occurs under the action of wind pressure of the volute tongue plate 20, and the deformation or movement phenomenon of the volute tongue plate 20 can affect the heat dissipation performance and noise of the application.

As shown in fig. 6, the whirlpool tongue 20 is provided with an arcuate transition connecting the air intake end and the air exhaust end, according to one embodiment of the present invention.

In this embodiment, the overall shape of the volute tongue plate 20 may be set to be a circular arc structure, an inclined plane structure or a U-shaped structure, and in a certain range, the air inlet end and the air outlet end of the volute tongue plate 20 are raised at the same time, so as to improve the unstable performance of the through-flow fan 100, thereby realizing the effects of low noise and stable air suction.

In addition, it should be noted that the above embodiment does not limit the connection structure between the volute tongue plate 20, the back wind plate 10 and the two end plates, because the volute tongue plate 20 and the back wind plate 10 can be fixedly mounted on the two end plates or movably mounted on the two end plates when the two end plates are relatively fixed, that is, the air inlet and the air outlet of the through-flow fan can be adjusted by adjusting the posture of the volute tongue plate 20 and/or the back wind plate 10, so that the good use experience of the through-flow fan 100 with low noise while maintaining high air suction performance in the heat dissipation system is achieved.

According to an embodiment of the present invention, the whirlpool tongue 20 is slidably mounted on both end plates in the circumferential direction of the fan wheel 30, and the whirlpool tongue 20 is capable of adjusting the heights of the air intake end and the air exhaust end in a manner of sliding in the circumferential direction.

In this embodiment, although the through-flow fan 100 of the present application can have both the heat dissipation performance and the noise reduction effect, for the case that the user has a higher requirement on the heat dissipation performance and a lower requirement on the noise reduction, and for the case that the user has a lower requirement on the heat dissipation performance and a higher requirement on the noise reduction, the use requirement of the user can be satisfied by properly adjusting the height position and the air guiding posture of the volute tongue plate 20.

According to one embodiment of the present invention, the whirlpool tongue 20 is connected to the fan housing by a flexible connection which provides a sliding space for the whirlpool tongue 20 in a telescopic manner.

In this embodiment, the flexible connection member may be a rubber ring or a corrugated plate, which not only can seal the area between the volute tongue plate 20 and the exhaust channel, but also can provide a movable space for the volute tongue plate 20 through its deformation, so that the volute tongue can adjust the air inlet and the air outlet of the through-flow fan 100 by sliding along the circumferential direction of the fan impeller 30.

It should be noted that, to realize the airflow splitting and the heat dissipation effect required by the embodiments of the present application, the key lies in the design of the air suction path splitting surface and the matching design of the cross-flow fan 1000:

1) Design of air suction duct dividing surface

As shown in fig. 2 to 4, first, the first air inlet duct and the air outlet duct on the side of the whirlpool tongue plate 20 are naturally formed by separating air flow from each other by the whirlpool tongue plate 20, and in order to ensure the air suction effect of the second air inlet duct on the side of the back air plate 10, the air collecting groove 61 which is sunk on the plane of the air inlet duct dividing surface can be designed to enlarge the air suction opening of the second air inlet duct under the condition that the fan impeller 30 is unchanged. Meanwhile, the dividing point of the first air inlet channel and the second air inlet channel is designed under the rotating circle center of the fan impeller 30 and is close enough to the fan blades, so that the two air inlet channels can be divided, the balance between the two air inlet channels can be ensured, and unstable phenomena such as air exhaust and the like on any side of the air suction inlet can be avoided.

2) Selection of cross-flow fan 100

As shown in fig. 2 to 4, the direction of rotation of the cross-flow fan 100 should be clockwise, and in addition, it is critical that the lee plate 10 and the whirl plate 20 be matched, and as the working principle of the cross-flow fan 100 is as shown in fig. 2, when the fan impeller 30 rotates around the center point, the fan blades "scoop" air from one side of the whirl plate 20 to the other side, and the center of the air flow is located generally near the whirl plate 20 and near the air inlet end B of the whirl plate 20.

In order to enhance the air suction effect at the air inlet end a of the back air plate 10, the central angle of the air inlet surrounded by the back air plate 10 and the vortex tongue plate 20 should be smaller than 180 ° (i.e. the design of +.aob should be larger than 180 °), so as to ensure that more air volume can be sucked at the air inlet end of the vortex tongue plate 20, and also avoid the air exhaust phenomenon at the air inlet end of the back air plate 10, so that the cross-flow fan 100 selects the RH type in fig. 9 and the RL type in fig. 10 as much as possible, and the R type effect in fig. 11 is poor.

Whether the fan impeller 30 rotates clockwise or anticlockwise, and no matter the placement direction and the placement direction of the fan impeller 30, the air flow effect can be realized as long as the technical points of the design of the air channel dividing surface and the matching design of the back air plate 10 and the volute tongue plate 20 of the cross-flow fan 100 are met.

In addition, the present embodiment only describes the structure of the cross flow fan 100 related to the improvement point of the present application, and does not represent that the cross flow fan 100 does not have other structures, and the other structures of the cross flow fan 100 are conventional devices of those skilled in the art, and will not be described herein.

The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A cross flow fan, characterized in that the cross flow fan comprises:

the fan shell is provided with an air inlet, and the air inlet side and the leeward side of the air inlet are respectively provided with a volute tongue plate and a back air plate;

the air duct plate is arranged facing the air inlet, and a first air inlet duct which is positioned on one side of the volute tongue plate and communicated with the air inlet, and a second air inlet duct which is positioned on one side of the leeward plate and communicated with the air inlet are formed on the air duct plate.

2. The cross-flow fan according to claim 1, wherein the air duct plate is provided with an air collecting groove matched with the air inlet, and the air inlet end of the volute tongue plate and the air inlet end of the back air plate extend into the air collecting groove.

3. The cross flow fan of claim 2, wherein the air gathering tank includes a first groove portion in communication with the first air inlet duct and a second groove portion in communication with the second air inlet duct.

4. A crossflow blower as claimed in claim 3, in which the air inlet end of the whirlpool tongue plate is higher than the air inlet end of the lee plate, and the depth of the first recess portion is less than the depth of the second recess portion.

5. The cross flow fan according to claim 4, wherein a transition slope dividing the first groove portion and the second groove portion is provided at a bottom of the wind gathering groove.

6. The cross-flow fan of claim 5, wherein a fan impeller disposed proximate the air inlet is disposed within the fan housing, and the transition ramp is located directly below a center axis of the fan impeller.

7. The cross-flow fan of claim 6, wherein the air inlet has a central angle around the fan wheel of greater than 0 and less than 180 °.

8. The cross flow fan according to claim 7, wherein a first air inlet duct communicating with the first groove portion is provided on the duct plate, and the first air inlet duct is formed inside the first air inlet duct.

9. The cross-flow fan according to claim 8, wherein a second air inlet duct communicated with the second groove part is arranged on the air duct plate, the second air inlet duct is formed inside the second air inlet duct, and a butt joint area between the first air inlet duct and the second air inlet duct forms the air collecting groove.

10. The cross-flow fan of claim 9, further comprising an exhaust drum disposed on top of the first air intake drum and in communication with the fan wheel, and wherein the exhaust drum is connected to an exhaust end of the volute tongue plate.

11. The cross-flow fan as claimed in claim 10, wherein an end of the whirlpool tongue plate away from the air inlet forms the air exhaust end located in the air exhaust barrel, and the air exhaust end is provided with an air exhaust notch matched with the air exhaust barrel.

12. The cross-flow fan as claimed in claim 11, wherein the volute tongue plate is slidably mounted on the fan housing in a circumferential direction of the fan impeller, and the volute tongue plate is capable of adjusting the size of the air inlet in a manner of sliding in the circumferential direction.