Air supply device and tower fan

Abstract

The air supply device comprises a shell, a volute tongue, a volute, an impeller and a flow guide piece, the volute tongue and the volute are located in the shell, the shell, the volute tongue and the volute jointly form an air channel, the shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are both communicated with the air channel, the impeller is rotatably installed in the air channel, and the flow guide piece is arranged on the shell. The impeller is used for driving air to flow to the air duct from the air inlet and flow to the air outlet from the air duct, and the flow guide piece is arranged in the impeller and located between the axis of the impeller and the volute tongue so that the backflow area can be limited between the volute tongue and the flow guide piece. Therefore, the edge of the backflow area cannot be expanded to the position between the flow guide part and the axis of the impeller and the position between the axis of the impeller and the volute, development and expansion of the backflow area can be restrained, and the risk that the air supply device is blocked by the backflow area and accordingly the air outlet amount is reduced is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of household electrical appliances, and in particular to an air supply device and a tower fan. Background Art

[0002] At present, the air supply device of the tower fan can supply air to make the air in the room flow, so as to achieve the purpose of cooling or air circulation, which helps to improve the comfort of the user's living environment. However, the air supply device of the tower fan in the related art will form a large recirculation area near the volute tongue, resulting in a reduction in the air output of the tower fan. Utility Model Content

[0003] The embodiment of the utility model proposes an air supply device and a tower fan to improve at least one of the above problems.

[0004] The implementation method of the utility model achieves the above-mentioned purpose through the following technical solutions.

[0005] In the first aspect, an embodiment of the utility model provides an air supply device, which includes a shell, a volute tongue, a volute, an impeller and a guide member. The volute tongue and the volute are located in the shell, and the shell, the volute tongue and the volute together constitute an air duct. The shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the air duct. The impeller is rotatably installed in the air duct, and the impeller is used to drive air to flow from the air inlet to the air duct, and from the air duct to the air outlet. The guide member is arranged in the impeller and is located between the axis of the impeller and the volute tongue.

[0006] In some embodiments, the flow guide is arranged in an arc shape, and the flow guide has an inner arc surface and an outer arc surface arranged opposite to each other, and the inner arc surface faces the flow guide.

[0007] In some embodiments, the length direction of the flow guide is consistent with the length direction of the volute tongue and the length direction of the impeller.

[0008] In some embodiments, the volute tongue includes a connected volute tongue main section and a volute tongue air outlet section, the volute tongue main section is arranged opposite to the impeller, and the volute tongue air outlet section bends and extends from one end of the volute tongue main section close to the air outlet in a direction away from the impeller; the central angle formed by the outer arc surface and the axis of the impeller is a1, and the central angle formed by the volute tongue main section and the axis of the impeller is a2, wherein the central angle a1 is greater than the central angle a2.

[0009] In some embodiments, the central angle formed by the blades of two adjacent impellers and the axis of the impeller is a3, wherein the difference between the central angle a1 and the central angle a2 is consistent with the central angle a3.

[0010] In some embodiments, the guide member has a first edge and a second edge along its width direction, the line connecting the first edge and the impeller is tangent to the first edge and the blades of the impeller adjacent to the first edge, and the line connecting the second edge and the impeller is tangent to the second edge and the blades of the impeller adjacent to the second edge.

[0011] In some embodiments, the maximum distance between the inner arc surface and the inner circumference of the impeller is 8 mm to 15 mm.

[0012] In some embodiments, the air supply device further includes a fixing ring, which is located in the shell and is provided with an annular groove. The end of the impeller is provided with an annular end, which is rotatably located in the annular groove.

[0013] In a second aspect, an embodiment of the utility model further provides a tower fan, which includes a base and an air supply device of any of the above embodiments, wherein the air supply device is installed on the base.

[0014] The utility model provides an air supply device and a tower fan, wherein the air supply device includes a shell, a volute, a volute, an impeller and a guide member, the volute tongue and the volute are located in the shell, the shell, the volute tongue and the volute together constitute an air duct, the shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are both connected to the air duct, the impeller is rotatably installed in the air duct, the impeller is used to drive air to flow from the air inlet to the air duct, and from the air duct to the air outlet, the guide member is arranged in the impeller and is located between the axis of the impeller and the volute tongue, so as to limit the recirculation zone between the volute tongue and the guide member, so that the edge of the recirculation zone will not expand to the position between the guide member and the axis of the impeller and the position between the axis of the impeller and the volute casing, thereby helping to suppress the development and expansion of the recirculation zone, and further helping to reduce the risk of reducing the air output of the air supply device due to obstruction of the recirculation zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an air supply device provided in an embodiment of the utility model is shown.

[0017] Figure 2 Shows Figure 1 Schematic cross-sectional view of the central air supply device.

[0018] Figure 3 Shows Figure 1 A schematic cross-sectional view of the central air supply device from another angle.

[0019] Figure 4 Shows Figure 3 Enlarged schematic diagram of IV in the middle.

[0020] Figure 5 Shows Figure 1 A schematic cross-sectional view of the central air supply device from another angle.

[0021] Figure 6 Shows Figure 5 Schematic diagram of the structure of the impeller.

[0022] Description of Figure Numbers:

[0023] Air supply device 10, shell 100, air inlet 110, air outlet 120, air duct 130, volute tongue 200, volute tongue main section 210, volute tongue air outlet section 220, volute 300, impeller 400, blades 410, annular end 420, guide member 500, inner arc surface 510, outer arc surface 520, first edge 530, second edge 540, fixing ring 600, annular groove 610, inner ring surface 620, outer ring surface 630, air inlet grille 700, air outlet grille 800. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by those skilled in the art without making creative work are within the scope of protection of the utility model.

[0025] The technical solutions in the implementation scheme of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the implementation scheme of the utility model.

[0026] See also Figure 1 The utility model provides a tower fan, which may include a base and an air supply device 10. The air supply device 10 may be installed on the base so that the base supports the air supply device 10. The specific structure of the air supply device 10 may refer to the following embodiments. Since the tower fan adopts all the technical solutions of all the following embodiments, it has at least all the beneficial effects brought by the technical solutions of the following embodiments, which will not be described one by one here.

[0027] See also Figures 1 to 5The utility model embodiment proposes an air supply device 10, which may include a shell 100, a volute tongue 200, a volute 300, an impeller 400 and a guide member 500. The volute tongue 200 and the volute 300 may be located in the shell 100, and the shell 100, the volute tongue 200 and the volute 300 may together constitute an air duct 130. The shell 100 may be provided with an air inlet 110 and an air outlet 120, and the air inlet 110 and the air outlet 120 may both be connected to the air duct 130. The impeller 400 may be rotatably installed in the air duct 130. The impeller 400 may be used to drive air to flow from the air inlet 110 to the air duct 130, and from the air duct 130 to the air outlet 120. The guide member 500 may be arranged in the impeller 400 and be located between the axis O of the impeller 400 and the volute tongue 200. In this way, the guide member 500 is arranged in the impeller 400 and is located between the axis O of the impeller 400 and the volute tongue 200 to limit the recirculation zone between the volute tongue 200 and the guide member 500, so that the edge of the recirculation zone will not expand to the position between the guide member 500 and the axis O of the impeller 400 and the position between the axis O of the impeller 400 and the volute 300, thereby helping to suppress the development and expansion of the recirculation zone, and further helping to reduce the risk of the air supply device 10 reducing the air output due to obstruction of the recirculation zone.

[0028] See also Figure 2 In some embodiments, the air supply device 10 may further include an air inlet grille 700, which may be installed at the air inlet 110. The air inlet grille 700 may be a grille structure to evenly distribute the airflow entering the air duct 130, which helps to reduce the risk of the airflow forming turbulence or local high-speed flow areas in the initial stage, so that the air supply device 10 can supply air more smoothly and evenly. In addition, the air inlet grille 700 may also be provided with a filter, such as an HPEA filter, so that the air inlet grille 700 can not only guide the airflow, but also effectively block dust, hair and other impurities from entering the air duct 130, which helps to keep the interior of the air supply device 10 clean and extend the service life of the air supply device 10. Moreover, the air inlet grille 700 can also serve as a physical barrier to prevent fingers or other small objects from accidentally touching the high-speed rotating impeller 400, thereby helping to improve the safety of the air supply device 10.

[0029] Please continue reading Figure 2In some embodiments, the air supply device 10 may further include an air outlet grille 800, which may be installed at the air outlet 120. The air outlet grille 800 may be a grille structure, which may effectively shape and guide the airflow output from the air duct 130, so that the airflow diffuses to the indoor space in a more uniform and gentle manner, thereby improving the user's comfort. In addition, the air outlet grille 800 may also be provided with a filter, such as an HPEA filter, so that the air outlet grille 800 can not only guide the airflow, but also effectively prevent dust, hair and other impurities from entering the air duct 130, which helps to keep the interior of the air supply device 10 clean and extend the service life of the air supply device 10. Moreover, the air outlet grille 800 may also serve as a physical barrier to prevent fingers or other small objects from accidentally touching the high-speed rotating impeller 400, thereby improving the safety of the air supply device 10.

[0030] In some embodiments, the volute tongue 200 and the volute casing 300 can be installed on the shell 100 by means of screw connection or snap connection, and the volute tongue 200 and the volute casing 300 can be located between the air inlet grille 700 and the air outlet grille 800, thereby helping the volute tongue 200 and the volute casing 300 to work together to guide the air in the air duct 130 from the air inlet 110 to the air outlet 120.

[0031] See also Figure 6 In some embodiments, the impeller 400 may include a plurality of blades 410 , and the plurality of blades 410 may be arranged in a spaced relationship around the axis O of the impeller 400 , thereby helping the impeller 400 to drive air to flow from the air inlet 110 toward the air outlet 120 .

[0032] See also Figure 2 and Figure 5 In some embodiments, the guide member 500 may be arranged in an arc shape, that is, the guide member 500 is arranged in an arc shape along its width direction. The guide member 500 may have an inner arc surface 510 and an outer arc surface 520 arranged opposite to each other, and the inner arc surface 510 may face the guide member 500. Among them, since the inner arc surface 510 is arranged in an arc shape and the airflow in the recirculation zone is spiral, the inner arc surface 510 can guide the flow direction of the airflow in the recirculation zone, and the recirculation zone can be better confined between the volute tongue 200 and the guide member 500, thereby more effectively suppressing the development and expansion of the recirculation zone.

[0033] In addition, since the outer arc surface 520 is also arranged in an arc shape, and the width direction of the outer arc surface 520 can be bent in the direction from the air inlet to the air outlet 120, the outer arc surface 520 can guide the air in the air duct 130 from the air inlet 110 in the direction of the air outlet 120, and force the air in the air duct 130 to be guided, so that the air in the air duct 130 can flow out more easily along the outer arc surface 520, thereby further helping to increase the air output of the air supply device 10.

[0034] In some embodiments, the length direction of the guide member 500 is consistent with the length direction of the volute tongue 200 and the length direction of the impeller 400, that is, the extension direction of the guide member 500 is parallel or substantially parallel to the extension direction of the volute tongue 200 and the extension direction of the impeller 400. In this way, the guide member 500 can better cooperate with the volute tongue 200 and the impeller 400, so that the guide member 500 can more fully limit the development of the recirculation zone.

[0035] See also Figure 2 and Figure 5 In some embodiments, the volute tongue 200 may include a connected volute tongue main section 210 and a volute tongue air outlet section 220, the volute tongue main section 210 may be arranged opposite to the impeller 400, and the volute tongue air outlet section 220 may be bent and extended from one end of the volute tongue main section 210 close to the air outlet 120 in a direction away from the impeller 400. The center angle formed by the outer arc surface 520 and the axis O of the impeller 400 is a1, and the center angle formed by the volute tongue main section 210 and the axis O of the impeller 400 is a2, wherein the center angle a1 is greater than the center angle a2. Specifically, the guide member 500 has a wider deployment angle relative to the volute tongue 200, and the cooperation between the guide member 500 and the volute tongue 200 can more accurately limit the recirculation zone between the guide member 500 and the volute tongue 200, thereby further helping to reduce the risk of the recirculation zone developing and becoming larger. In addition, the central angle a1 is greater than the central angle a2, which helps the guide member 500 to guide the wind in the air duct 130 to the volute tongue air outlet section 220, thereby facilitating the air in the air duct 130 to quickly flow out from the air outlet 120.

[0036] In some embodiments, the central angle formed by the blades 410 of two adjacent impellers 400 and the axis O of the impeller 400 is a3, wherein the difference between the central angle a1 and the central angle a2 is consistent with the central angle a3, that is, the difference between the central angle a1 and the central angle a2 is the same or approximately the same as the central angle a3. For example, the central angle a1 can be 42.8 degrees, the central angle a2 can be 30.9 degrees, and the central angle a3 can be 11.6 degrees, so that the central angle a1 and the central angle a2 are approximately spaced by an angle of the central angle a3. In this way, the central angle a1, the central angle a2, and the central angle a3 satisfy the above relationship, which helps the airflow of the air duct 130 to accurately hit the volute tongue outlet section 220 after being guided by the guide member 500, thereby helping the air in the air duct 130 to be more quickly discharged from the outlet 120 by the volute tongue outlet section 220.

[0037] See also Figures 2 to 5 In some embodiments, the guide member 500 may have a first edge 530 and a second edge 540 along its width direction, that is, the guide member 500 has a first edge 530 and a second edge 540 along its width direction, the first edge 530 and the impeller 400 are tangent to the first edge 530 and the blade 410 of the impeller 400 adjacent to the first edge 530, and the second edge 540 and the impeller 400 are tangent to the second edge 540 and the blade 410 of the impeller 400 adjacent to the second edge 540. In this way, the first edge 530 and the second edge 540 of the guide member 500 are tangent to the edges of the blade 410 adjacent to the impeller 400, respectively, so that the airflow can smoothly transition when entering and leaving the guide member 500 and flow along the outer arc surface 520 of the guide member 500 without impact, thereby helping to reduce the risk of disturbance and energy loss of the airflow in the air duct 130.

[0038] In addition, the airflow in the air duct 130 smoothly transitions between the air guide 500 and the impeller 400 , thereby helping to reduce the risk of the airflow hitting the air guide 500 and generating a large noise.

[0039] Moreover, the first edge 530 and the second edge 540 of the guide member 500 are respectively tangent to the edges of the blades 410 adjacent to the impeller 400 so that the airflow can be smoothly accelerated along the contour of the guide member 500, and under the guidance of the guide member 500, it can smoothly enter the volute tongue 200 and finally be output from the air outlet 120.

[0040] See also Figure 2 and Figure 5In some embodiments, the maximum spacing L between the inner arc surface 510 and the inner peripheral contour of the impeller 400 is 8mm-15mm. The maximum spacing L between the inner arc surface 510 and the inner peripheral contour of the impeller 400 may be, but is not limited to, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm or 15mm. In this way, the maximum spacing L between the inner arc surface 510 and the inner peripheral contour of the impeller 400 is within the above range, so that the spacing between the inner arc surface 510 and the inner peripheral contour of the impeller 400 will not increase the flow velocity of the airflow near the volute tongue 200 due to being too small, thereby helping to reduce the risk of noise generated by the airflow near the volute tongue 200 due to large pressure changes. In addition, the maximum spacing L between the inner arc surface 510 and the inner peripheral contour of the impeller 400 is within the above range, which helps to reduce the risk of the recirculation zone becoming larger due to the spacing between the inner arc surface 510 and the inner peripheral contour of the impeller 400 being too large.

[0041] See also Figures 1 to 6 In some embodiments, the air supply device 10 may further include a fixing ring 600, which may be located inside the housing 100. For example, the fixing ring 600 may be fixed to the housing 100 by means of a snap connection or a screw connection, and the fixing ring 600 may be provided with an annular groove 610. The end of the impeller 400 may be provided with an annular end 420, and the annular end 420 may be rotatably located in the annular groove 610. The shape of the annular groove 610 may be adapted to the shape of the annular end 420, thereby helping to reduce the risk of the impeller 400 being offset or shaken in a high-speed rotating state, thereby helping to improve the mechanical stability of the air supply device 10, so as to extend the service life of the air supply device 10.

[0042] In some embodiments, the air supply device 10 can also have a motor, and the motor can be transmission-connected to the end of the impeller 400 away from the fixed ring 600. For example, the output shaft of the motor can be transmission-connected to the end of the impeller 400 away from the fixed ring 600, thereby helping to realize the function of rotating the impeller 400 relative to the shell 100.

[0043] In some embodiments, the fixing ring 600 may have an inner ring surface 620 and an outer ring surface 630 that are opposite to each other, the annular groove 610 may be located between the inner ring surface 620 and the outer ring surface 630, and the guide member 500 may be located on the inner ring surface 620, so that the guide member 500 can be closer to the impeller 400, which helps the guide member 500 to be closer to the volute tongue 200, thereby helping the air supply device 10 to control the distance between the volute tongue 200 and the guide member 500 within an appropriate range.

[0044] In some embodiments, the fixing ring 600 can be integrally formed with the guide member 500, which helps to improve the connection strength between the fixing ring 600 and the guide member 500, and also helps to reduce the assembly process of the fixing ring 600 and the guide member 500, thereby helping to improve the assembly efficiency of the air supply device 10.

[0045] Based on the above-mentioned embodiment, the present application provides a guide member 500 in the impeller 400, and the shape and position of the guide member 500 are cleverly designed, which can better control the vortex center of the recirculation zone and greatly reduce the recirculation zone, greatly inhibiting the development and expansion of the recirculation zone, helping to increase the air output of the air supply device 10, and also helping to improve the operating efficiency of the air supply device 10.

[0046] In the utility model, unless otherwise clearly specified or limited, the terms "installation", "connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements, it can be only surface contact, or it can be connected through surface contact of an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0047] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the utility model, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the utility model and the features of different embodiments or examples without contradiction.

[0048] The above implementation modes are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the aforementioned implementation modes, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned implementation modes, or replace some of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the utility model, and should all be included in the protection scope of the utility model.

Claims

1. An air supply device, characterized in that: include: A shell, a volute tongue and a volute, wherein the volute tongue and the volute are located in the shell, and the shell, the volute tongue and the volute together constitute an air duct, and the shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the air duct; an impeller, the impeller being rotatably mounted on the air duct, the impeller being used to drive air to flow from the air inlet to the air duct, and from the air duct to the air outlet; as well as A flow guide is arranged in the impeller and located between the axis of the impeller and the volute tongue.

2. The air supply device according to claim 1, characterized in that: The flow guide is arranged in an arc shape, and has an inner arc surface and an outer arc surface arranged opposite to each other, and the inner arc surface faces the flow guide.

3. The air supply device according to claim 2, characterized in that: The length direction of the flow guide is consistent with the length of the volute tongue and the length direction of the impeller.

4. The air supply device according to claim 2, characterized in that: The volute tongue includes a connected volute tongue main section and a volute tongue air outlet section, the volute tongue main section is arranged opposite to the impeller, and the volute tongue air outlet section bends and extends from one end of the volute tongue main section close to the air outlet in a direction away from the impeller; the central angle formed by the outer arc surface and the axis of the impeller is a1, and the central angle formed by the volute tongue main section and the axis of the impeller is a2, wherein the central angle a1 is greater than the central angle a2.

5. The air supply device according to claim 4, characterized in that: The central angle formed by the blades of two adjacent impellers and the axis of the impeller is a3, wherein the difference between the central angle a1 and the central angle a2 is consistent with the central angle a3.

6. The air supply device according to claim 2, characterized in that: The guide member has a first edge and a second edge along its width direction, wherein a line connecting the first edge and the impeller is tangent to the first edge and the blades of the impeller adjacent to the first edge, and a line connecting the second edge and the impeller is tangent to the second edge and the blades of the impeller adjacent to the second edge.

7. The air supply device according to claim 2, characterized in that: The maximum distance between the inner arc surface and the inner peripheral contour of the impeller is 8mm-15mm.

8. The air supply device according to claim 1, characterized in that: The air supply device further comprises a fixing ring, which is located in the housing and is provided with an annular groove. The end of the impeller is provided with an annular end, which is rotatably located in the annular groove.

9. The air supply device according to claim 8, characterized in that: The fixing ring has an inner ring surface and an outer ring surface facing each other, the annular groove is located between the inner ring surface and the outer ring surface, the flow guide is located on the inner ring surface, and the fixing ring and the flow guide are integrally formed.

10. A tower fan, characterized in that: include: Base; as well as According to any one of claims 1 to 9, the air supply device is installed on the base.

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