Tower fan

Abstract

The utility model relates to a tower fan which comprises a shell, the shell is provided with a containing cavity, an air inlet and an air outlet, and the air inlet and the air outlet both communicate with the containing cavity; the wind wheel is rotatably located in the containing cavity so as to drive air to flow to the containing cavity from the air inlet and flow to the air outlet from the containing cavity; the air guide assembly is located in the containing cavity and comprises a volute air pressing plate and a volute tongue air pressing plate, and the volute air pressing plate and the volute tongue air pressing plate are located on the two opposite sides of the wind wheel correspondingly and located between the air inlet and the air outlet. The distance between the volute air pressing plate and the wind wheel is decreased and then increased in the direction from the air inlet to the air outlet. According to the tower fan, the air outlet speed and the air blowing distance can be increased.

Description

Technical Field

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

[0002] Tower fans, also known as bladeless tower fans, are a modern household appliance widely popular for their unique design and safety features. Unlike traditional fans, tower fans lack exposed blades and instead deliver air through a circular outlet. This design not only improves safety but also gives tower fans a simple and aesthetically pleasing appearance that complements various interior décor styles.

[0003] However, in existing tower fan designs, the internal air duct is usually narrow, which increases the air flow resistance, restricts the circulation of air, and makes the wind speed of the tower fan low. Utility Model Content

[0004] The present application provides a tower fan to solve the problem of relatively low wind speed of existing tower fans.

[0005] In a first aspect, the present application provides a tower fan, comprising:

[0006] A housing, wherein the housing is provided with a receiving cavity, an air inlet and an air outlet, wherein the air inlet and the air outlet are both connected to the receiving cavity;

[0007] a wind wheel rotatably located in the accommodating chamber to drive air from the air inlet to the accommodating chamber, and then from the accommodating chamber to the air outlet; and

[0008] An air guide assembly is located in the accommodating cavity, and the air guide assembly includes a volute wind pressure plate and a volute tongue wind pressure plate. The volute wind pressure plate and the volute tongue wind pressure plate are respectively located on opposite sides of the wind wheel, and are both located between the air inlet and the air outlet. The distance between the volute wind pressure plate and the wind wheel is first reduced and then increased from the air inlet to the air outlet.

[0009] In some embodiments, the housing includes a front shell, a rear shell, and a rear net, the front shell and the rear shell are connected to form a receiving cavity, the rear shell has an opening, the rear net is located in the opening, the air inlet is located in the rear net, and the air outlet is located in the front shell;

[0010] The volute tongue wind pressure plate is connected to the front shell, and the volute shell wind pressure plate includes a first sub-wind pressure plate and a second sub-wind pressure plate connected to each other. The first sub-wind pressure plate is connected to the rear shell, and the second sub-wind pressure plate is connected to the front shell.

[0011] In some embodiments, a first abutment plane is provided on the side of the first sub-wind pressure plate facing the second sub-wind pressure plate, and a second abutment plane is provided on the side of the second sub-wind pressure plate facing the first sub-wind pressure plate, and the second abutment plane is in contact with the first abutment plane.

[0012] In some embodiments, the minimum distance between the volute wind pressure plate and the wind wheel is 4 mm to 5 mm.

[0013] In some embodiments, the minimum distance between the volute tongue wind pressure plate and the wind wheel is 3mm-5mm.

[0014] In some embodiments, the axis of the wind wheel does not coincide with the axis of the housing, the wind wheel is disposed close to the air inlet, and the volute tongue wind pressure plate is disposed close to the air outlet.

[0015] In some embodiments, a central angle formed by the air inlet and the axis of the housing is 110°-120°.

[0016] In some embodiments, the width of the air outlet is 50 mm-65 mm.

[0017] In some embodiments, the shell is provided with a plurality of air guide strips, and the plurality of air guide strips are all located at the air outlet, and the extension direction of each of the air guide strips is consistent with the radial direction of the shell.

[0018] In some embodiments, the extension direction of one end of the volute wind pressure plate close to the air outlet is the same as the extension direction of the air guide strip;

[0019] And / or, the extension direction of one end of the volute tongue wind pressure plate close to the air outlet is the same as the extension direction of the air guide strip.

[0020] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0021] The tower fan provided in the embodiment of the present application is provided with an air guide assembly including a volute wind pressure plate and a volute tongue wind pressure plate, wherein the volute wind pressure plate and the volute tongue wind pressure plate are respectively located on opposite sides of the wind wheel, and are both located between the air inlet and the air outlet, that is, the two sides of the air outlet are respectively connected to the volute wind pressure plate and the volute tongue wind pressure plate, so that the volute wind pressure plate can guide the wind from the air inlet in the direction of the air outlet, and the volute tongue wind pressure plate can block the other side of the air outlet to make the wind flow out to the air outlet, which helps to reduce the backflow of wind at the air outlet and thereby increase the wind speed at the air outlet.

[0022] In addition, the distance between the volute wind pressure plate and the wind wheel is arranged to first decrease and then increase from the air inlet to the air outlet. Since the distance between the volute wind pressure plate and the wind wheel is arranged to first decrease and then increase from the air inlet to the air outlet, it can be ensured that the volute wind pressure plate has a sufficiently large air inlet and air outlet. In the middle area of ​​the volute wind pressure plate, by reducing the distance between the volute wind pressure plate and the wind wheel, the wind in this area can be squeezed, thereby increasing the wind pressure and then increasing the wind speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 A schematic diagram of the assembly structure of a tower fan provided in an embodiment of the present application.

[0027] Figure 2 This is a schematic diagram of a partially exploded structure of an embodiment of a tower fan provided in an embodiment of the present application.

[0028] Figure 3 A schematic diagram of a partially exploded structure of another embodiment of a tower fan provided in an embodiment of the present application.

[0029] Figure 4 A schematic cross-sectional view of a tower fan provided in an embodiment of the present application.

[0030] Figure 5 This is a schematic structural diagram of an embodiment of the front shell provided in an embodiment of the present application.

[0031] Figure 6 This is a schematic structural diagram of an embodiment of the volute wind pressure plate provided in an embodiment of the present application.

[0032] Figure 7 This is a schematic structural diagram of an embodiment of the first sub-wind pressure plate provided in an embodiment of the present application.

[0033] Figure 8 This is a schematic structural diagram of an embodiment of the second sub-wind pressure plate provided in an embodiment of the present application.

[0034] Figure 9 This is a schematic structural diagram of an embodiment of the volute tongue wind pressure plate provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] Tower fan 10, shell 100, accommodating chamber 101, air inlet 102, air outlet 103, front shell 110, rear shell 120, opening 121, rear net 130, wind guide strip 140, wind wheel 200, wind guide assembly 300, volute wind pressure plate 310, first sub-wind pressure plate 311, second sub-wind pressure plate 312, volute tongue wind pressure plate 320, first abutment plane 331, second abutment plane 332. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0039] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0040] In order to solve the technical problem of low wind speed of tower fans in the prior art, the present application provides a tower fan that can increase the wind speed of the tower fan.

[0041] See Figures 1-9 A tower fan 10 provided in an embodiment of the present application includes a housing 100 , a wind wheel 200 and an air guide assembly 300 .

[0042] The housing 100 is provided with a receiving cavity 101 , an air inlet 102 and an air outlet 103 , and both the air inlet 102 and the air outlet 103 are connected to the receiving cavity 101 .

[0043] The wind wheel 200 is rotatably located in the accommodating chamber 101 to drive air to flow from the air inlet 102 to the accommodating chamber 101 and from the accommodating chamber 101 to the air outlet 103; and

[0044] The air guide assembly 300 is located in the accommodating cavity 101, and the air guide assembly 300 includes a volute wind pressure plate 310 and a volute tongue wind pressure plate 320. The volute wind pressure plate 310 and the volute tongue wind pressure plate 320 are respectively located on opposite sides of the wind wheel 200, and are both located between the air inlet 102 and the air outlet 103. The distance between the volute wind pressure plate 310 and the wind wheel 200 is first reduced and then increased from the air inlet 102 to the air outlet 103.

[0045] In this way, the tower fan 10 is provided with an air guide component 300 including a volute wind pressure plate 310 and a volute tongue wind pressure plate 320, wherein the volute wind pressure plate 310 and the volute tongue wind pressure plate 320 are respectively located on opposite sides of the wind wheel 200, and are both located between the air inlet 102 and the air outlet 103, that is, the two sides of the air outlet 103 are respectively connected to the volute wind pressure plate 310 and the volute tongue wind pressure plate 320, so that the volute wind pressure plate 310 can guide the wind from the air inlet 102 from the direction of the air outlet 103, and the volute tongue wind pressure plate 320 can block the other side of the air outlet 103 to make the wind flow out to the air outlet 103, which helps to reduce the backflow of wind at the air outlet 103, thereby increasing the wind speed at the air outlet 103.

[0046] In addition, the distance between the volute wind pressure plate 310 and the wind wheel 200 is arranged to first decrease and then increase from the air inlet 102 to the air outlet 103. Since the distance between the volute wind pressure plate 310 and the wind wheel 200 is arranged to first decrease and then increase from the air inlet 102 to the air outlet 103, it can be ensured that the volute wind pressure plate 310 has a sufficiently large air inlet 102 and air outlet 103. In the middle area of ​​the volute wind pressure plate 310, by reducing the distance between the volute wind pressure plate 310 and the wind wheel 200, the wind in this area can be squeezed, the wind pressure of the outlet air can be increased, and then the wind speed can be increased, thereby increasing the air supply distance.

[0047] In some embodiments, the housing 100 includes a front shell 110, a rear shell 120, and a rear net 130. The front shell 110 and the rear shell 120 are connected to form a receiving cavity 101. The rear shell 120 has an opening 121. The rear net 130 is located in the opening 121. The air inlet 102 is located in the rear net 130. The air outlet 103 is located in the front shell 110.

[0048] The volute tongue wind pressure plate 320 is connected to the front shell 110, and the volute wind pressure plate 310 includes a first sub-wind pressure plate 311 and a second sub-wind pressure plate 312 connected to each other. The first sub-wind pressure plate 311 is connected to the rear shell 120, and the second sub-wind pressure plate 312 is connected to the front shell 110.

[0049] In this way, the first sub-wind pressure plate 311 is connected to the rear shell 120 to enhance the strength of the rear shell 120 , and the second sub-wind pressure plate 312 is connected to the front shell 110 to enhance the strength of the front shell 110 .

[0050] In some embodiments, a first abutment plane 331 is provided on the side of the first sub-wind pressure plate 311 facing the second sub-wind pressure plate, and a second abutment plane 332 is provided on the side of the second sub-wind pressure plate 312 facing the first sub-wind pressure plate, and the second abutment plane 332 is in contact with the first abutment plane 331.

[0051] In this way, by setting a fitting abutment plane on the first sub-wind pressure plate 311 and the second sub-wind pressure plate 312, the contact area between the first sub-wind pressure plate 311 and the second sub-wind pressure plate 312 can be increased, and air can be prevented from leaking from the connecting gap between the first sub-wind pressure plate 311 and the second sub-wind pressure plate 312, thereby maintaining a higher wind pressure, increasing the wind speed and air supply distance, and at the same time reducing energy waste and loss, thereby improving the overall energy efficiency of the tower fan 10.

[0052] In some embodiments, the minimum distance between the volute wind pressure plate 310 and the wind wheel 200 is 4 mm to 5 mm.

[0053] The minimum spacing between the volute wind pressure plate 310 and the wind wheel 200 may include but is not limited to 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm and 5 mm.

[0054] Since the distance between the volute wind pressure plate 310 and the wind wheel 200 is too small, the volute wind pressure plate 310 and the wind wheel 200 will rub against each other during operation, thereby generating friction noise, affecting the user experience. If the distance between the volute wind pressure plate 310 and the wind wheel 200 is too large, it will not be able to squeeze the wind, thereby failing to increase the wind pressure. Therefore, this application sets the minimum distance between the volute wind pressure plate 310 and the wind wheel 200 to 4mm-5mm, which can not only increase the wind pressure, but also avoid the friction noise between the volute wind pressure plate 310 and the wind wheel 200.

[0055] In addition, the angle range corresponding to the minimum spacing may be 20°-25°.

[0056] See Figure 4 , Figure 4 Where b is the angle corresponding to the minimum spacing, and the angle b corresponding to the minimum spacing may include but is not limited to 20°, 21°, 22°, 23°, 24° and 25°.

[0057] In some embodiments, the minimum distance between the volute tongue wind pressure plate 320 and the wind wheel 200 is 3 mm to 5 mm.

[0058] The minimum spacing between the volute tongue wind pressure plate 320 and the wind wheel 200 may include but is not limited to 3 mm, 3.1 mm, 3.2 mm, 4.1 mm, 4.4 mm, 4.5 mm, 4.6 mm and 5 mm.

[0059] Since the distance between the volute tongue wind pressure plate 320 and the wind wheel 200 is too small, the volute tongue wind pressure plate 320 and the wind wheel 200 will rub against each other during operation, thereby generating friction noise, affecting the user experience. If the distance between the volute tongue wind pressure plate 320 and the wind wheel 200 is too large, the wind blown out by the volute wind pressure plate 310 will easily flow back from the distance between the volute tongue wind pressure plate 320 and the wind wheel 200, thereby reducing the air output at the air outlet 103.

[0060] Therefore, the present application sets the minimum distance between the volute tongue wind pressure plate 320 and the wind wheel 200 to 4mm-5mm, which can not only increase the wind pressure, but also avoid friction noise between the volute wind pressure plate 310 and the wind wheel 200.

[0061] In some embodiments, the axis of the wind wheel 200 does not coincide with the axis of the housing 100 , the wind wheel 200 is disposed close to the air inlet 102 , and the volute tongue wind pressure plate 320 is disposed close to the air outlet 103 .

[0062] See Figure 4 , Figure 4 A in FIG. 1 is the axis of the housing 100 , and the axis of the wind wheel 200 is located on the left side of the axis A of the housing 100 .

[0063] Since the axis of the wind wheel 200 does not coincide with the axis of the housing 100 and the wind wheel 200 is arranged close to the air inlet 102, a larger wind wheel 200 can be selected when the minimum distance between the volute wind pressure plate 310 and the wind wheel 200 is the same.

[0064] In some embodiments, a central angle formed by the air inlet 102 and the axis of the housing 100 is 110°-120°.

[0065] See Figure 4 , Figure 4 Wherein, a is a central angle formed by the air inlet 102 and the axis of the housing 100 , wherein the central angle a may include but is not limited to 110°, 111°, 112°, 113° and 120°.

[0066] If the central angle formed by the air inlet 102 and the axis of the shell 100 is too large, the air intake of the air inlet 102 will be too large, resulting in air leakage. If the central angle formed by the air inlet 102 and the axis of the shell 100 is too small, the air intake of the air inlet 102 will be too small and insufficient.

[0067] Therefore, the present application sets the central angle formed by the air inlet 102 and the axis of the shell 100 to 110°-120°, which can ensure sufficient air intake while avoiding air leakage from the air inlet 102.

[0068] In some embodiments, the width of the air outlet 103 is 50 mm-65 mm.

[0069] See Figure 4 , Figure 4 Wherein, w is the width of the air outlet 103 , wherein the width w of the air outlet 103 may include but is not limited to 50 mm, 51 mm, 52 mm, 53 mm, 60 mm, and 65 mm.

[0070] If the width of the air outlet 103 is too large, the air outlet speed of the air outlet 103 will be relatively low, thereby shortening the air supply distance. If the width of the air outlet 103 is too small, the air outlet volume of the air outlet 103 will be insufficient.

[0071] Therefore, the width of the air outlet 103 in this application is set to 50mm-65mm, which can increase the air outlet speed while ensuring sufficient air volume, thereby increasing the air supply distance.

[0072] Since the air outlet 103 of the bladeless tower fan 10 on the market is mostly set on one side of the body, it affects the use and appearance and is difficult to meet the user's requirements. Therefore, the embodiment of the present application sets the air outlet 103 at the center of the tower fan 10 body. For details, please refer to Figure 4 .

[0073] This can avoid the phenomenon of uneven wind force caused by the wind blowing toward one side of the fan body during the air outlet, thereby improving the uniformity of the air outlet 103. In addition, the centrally located air outlet 103 makes the overall design of the tower fan 10 more symmetrical and beautiful, meeting the aesthetic requirements of modern home and office environments, avoiding the visual disharmony caused by the single-sided air outlet 103, and improving the overall aesthetics of the tower fan 10.

[0074] In some embodiments, the housing 100 is provided with a plurality of air guide strips 140 , and the plurality of air guide strips 140 are all located at the air outlet 103 , and the extension direction of each air guide strip 140 is consistent with the radial direction of the housing 100 .

[0075] By setting multiple air guide strips 140 at the air outlet 103, and the extension direction of each air guide strip 140 is consistent with the radial direction of the shell 100, the wind emitted by the volute wind pressure plate 310 can be guided to the air outlet 103, thereby increasing the air output of the air outlet 103.

[0076] In addition, a plurality of air guide strips 140 may be arranged at intervals at the air outlet 103 , thereby improving the air outlet uniformity of the air outlet 103 .

[0077] In some embodiments, the extension direction of the end of the volute wind pressure plate 310 close to the air outlet 103 is the same as the extension direction of the air guide strip 140;

[0078] And / or, the extension direction of one end of the volute tongue wind pressure plate 320 close to the air outlet 103 is the same as the extension direction of the air guide strip 140 .

[0079] For example, in some embodiments, the extension direction of one end of the volute wind pressure plate 310 close to the air outlet 103 is the same as the extension direction of the air guide strip 140 .

[0080] Alternatively, in some embodiments, the extending direction of one end of the volute tongue wind pressure plate 320 close to the air outlet 103 is the same as the extending direction of the air guide strip 140 .

[0081] Alternatively, in some embodiments, the extension direction of the volute wind pressure plate 310 at one end close to the air outlet 103 is the same as the extension direction of the wind guide strip 140, and the extension direction of the volute tongue wind pressure plate 320 at one end close to the air outlet 103 is the same as the extension direction of the wind guide strip 140.

[0082] See Figure 4 , Figure 4 s1 in the figure is the end of the volute tongue wind pressure plate 320 close to the air outlet 103. Figure 4 Here, s2 is one end of the volute wind pressure plate 310 close to the air outlet 103, and the extension direction of s1 and s2 is the same as the extension direction of the wind guide strip 140. In this way, the wind blown out by the volute wind pressure plate 310 can be guided toward the direction of the air outlet 103, and the uniformity of the air outlet at the air outlet 103 can be improved.

[0083] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0086] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0087] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0088] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring 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 the different embodiments or examples described in this specification.

[0089] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, as long as these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0090] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A tower fan, characterized in that: include: A housing, wherein the housing is provided with a receiving cavity, an air inlet and an air outlet, wherein the air inlet and the air outlet are both connected to the receiving cavity; a wind wheel rotatably located in the accommodating chamber to drive air from the air inlet to the accommodating chamber, and then from the accommodating chamber to the air outlet; and An air guide assembly is located in the accommodating cavity, and the air guide assembly includes a volute wind pressure plate and a volute tongue wind pressure plate. The volute wind pressure plate and the volute tongue wind pressure plate are respectively located on opposite sides of the wind wheel, and are both located between the air inlet and the air outlet. The distance between the volute wind pressure plate and the wind wheel is first reduced and then increased from the air inlet to the air outlet.

2. The tower fan according to claim 1, wherein: The housing comprises a front shell, a rear shell and a rear net, the front shell and the rear shell are connected to form a receiving cavity, the rear shell is provided with an opening, the rear net is located in the opening, the air inlet is located on the rear net, and the air outlet is located on the front shell; The volute tongue wind pressure plate is connected to the front shell, and the volute shell wind pressure plate includes a first sub-wind pressure plate and a second sub-wind pressure plate connected to each other. The first sub-wind pressure plate is connected to the rear shell, and the second sub-wind pressure plate is connected to the front shell.

3. The tower fan according to claim 2, characterized in that A first abutting plane is provided on the side of the first sub-wind pressure plate facing the second sub-wind pressure plate, and a second abutting plane is provided on the side of the second sub-wind pressure plate facing the first sub-wind pressure plate. The second abutting plane is in contact with the first abutting plane.

4. The tower fan according to claim 1, wherein: The minimum distance between the volute wind pressure plate and the wind wheel is 4mm-5mm.

5. The tower fan according to claim 1, characterized in that The minimum distance between the volute tongue wind pressure plate and the wind wheel is 3mm-5mm.

6. The tower fan according to claim 1, wherein: The axis of the wind wheel does not coincide with the axis of the shell, the wind wheel is arranged close to the air inlet, and the volute tongue wind pressure plate is arranged close to the air outlet.

7. The tower fan according to claim 1, characterized in that The central angle formed by the air inlet and the axis of the shell is 110°-120°.

8. The tower fan according to claim 1, wherein: The width of the air outlet is 50mm-65mm.

9. The tower fan according to claim 1, wherein: The shell is provided with a plurality of air guide strips, and the plurality of air guide strips are all located at the air outlet, and the extension direction of each air guide strip is consistent with the radial direction of the shell.

10. The tower fan according to claim 9, characterized in that The extending direction of one end of the volute wind pressure plate close to the air outlet is the same as the extending direction of the air guide strip; And / or, the extension direction of one end of the volute tongue wind pressure plate close to the air outlet is the same as the extension direction of the air guide strip.

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