Tower fan

Abstract

The utility model provides a tower fan which comprises a shell and a wind wheel, the shell is provided with an air inlet and an air outlet, the wind wheel is eccentrically arranged relative to the shell, a plurality of fan blades are arranged around the wind wheel, a plurality of air guide blades are arranged on the air inlet, the air guide blades are arranged in a protruding mode towards the wind wheel, and the wind wheel is arranged in the shell. The fan blades and the air guide blades are arranged in the opposite directions in a rotating mode. An in-wheel air channel is formed between every two adjacent fan blades, an air guide channel is formed between every two adjacent air guide blades, and the air guide channels face the in-wheel air channels. According to the tower fan, a plurality of air guide blades are arranged on an air inlet, and the air direction is guided through the air guide blades, so that eccentric vortexes generated due to the fact that a wind wheel is eccentrically arranged relative to a shell are eliminated.

Description

Technical Field

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

[0002] With the continuous development of modern society, tower fans, as a common air conditioning equipment, have been favored by consumers due to their advantages such as good air supply effect, small footprint, and beautiful appearance. In order to meet the demand for miniaturized electrical appliances in modern homes, the design of tower fans has been continuously optimized, in which the wind wheel, volute tongue and volute are usually compactly arranged in the outer shell to make the tower fan miniaturized.

[0003] In order to further reduce the size of the tower fan, the wind wheel is often set eccentrically relative to the shell, that is, the central axis of the wind wheel does not coincide with the central axis of the shell. This method has indeed achieved remarkable results in saving shell space and miniaturizing the tower fan, allowing the tower fan to more flexibly adapt to various home environments and provide users with a more comfortable air supply experience.

[0004] However, the eccentric arrangement of the wind wheel in the housing also causes a problem that cannot be ignored - the formation of eccentric vortex. Due to the eccentric arrangement of the wind wheel, the airflow inside the housing becomes complicated and no longer in a uniform flow state, but forms an obvious eccentric vortex. This eccentric vortex occupies a dominant position in the flow field, and the strong vortex force it generates will have a strong control effect on the entire flow field.

[0005] The presence of eccentric vortices has a number of negative effects on the performance of tower fans. On the one hand, vortices greatly increase wind resistance. When the airflow passes through the impeller and the volute tongue, the flow of the airflow becomes unstable due to the disturbance of the vortex, and the resistance increases significantly. This not only reduces the air output of the tower fan, which greatly reduces the air supply effect and fails to effectively provide users with a comfortable environment, but also increases the energy consumption of the tower fan and reduces its energy efficiency ratio.

[0006] On the other hand, the eccentric vortex also produces a lot of noise. When the airflow rotates at high speed in the vortex, it will produce strong friction and collision with the wind wheel, snail tongue and other parts, thus producing harsh noise. This noise will not only have a negative impact on the user's comfort and reduce the user's experience, but may also cause damage to the user's hearing, especially when used for a long time or at night. Utility Model Content

[0007] The primary purpose of the present utility model is to solve at least one of the above problems and provide a tower fan.

[0008] In order to meet the various purposes of the utility model, the utility model adopts the following technical solutions:

[0009] A tower fan is provided to meet one of the purposes of the utility model, including a shell and a wind wheel, the shell being provided with an air inlet and an air outlet, the wind wheel being eccentrically arranged relative to the shell, the wind wheel being surrounded by a plurality of fan blades, the air inlet being provided with a plurality of air guide blades, the air guide blades being protruding toward the wind wheel, the fan blades and the air guide blades being respectively rotated in opposite directions to each other; an inner wheel air duct is formed between two adjacent fan blades, an air guide channel is formed between two adjacent air guide blades, and the air guide channel is opposite to the inner wheel air duct.

[0010] Furthermore, the ends of the plurality of wind guide blades are arranged at equal intervals from the outer circumference of the wind wheel.

[0011] Specifically, the head end of the air guide blade is arranged substantially perpendicular to the edge of the air inlet.

[0012] In one embodiment, the air guide channel includes an air guide inlet and an air guide outlet, the air guide outlet faces the in-wheel air duct, and the opening width of the air guide inlet is greater than the opening width of the air guide outlet.

[0013] In one embodiment, an opening angle of the air guiding inlet is greater than an opening angle of the air guiding outlet.

[0014] In one embodiment, the air guide channel includes an air guide outlet, the in-wheel air duct includes an in-wheel inlet, the air guide outlet is opposite to the in-wheel inlet, and an opening angle of the in-wheel inlet is greater than an opening angle of the air guide outlet.

[0015] In one embodiment, the opening width of the air guide outlet is smaller than the opening width of the inlet of the wheel.

[0016] In one embodiment, a plurality of ribs are further provided on the air inlet, the plurality of ribs are arranged in sequence along the vertical direction of the tower fan, the plurality of wind guide blades are arranged in sequence along the circumferential direction of the tower fan, and the wind guide blades are perpendicular to the ribs.

[0017] In one embodiment, the air guide blade is an arc-shaped plate structure.

[0018] In one embodiment, the shell includes a front shell and a rear shell, the air inlet is opened on the rear shell, the air outlet is opened on the front shell, and the plurality of air guide blades are integrally formed with the rear shell.

[0019] Compared with the prior art, the present invention has many advantages, including but not limited to:

[0020] Firstly, the combination of the eccentrically arranged wind wheel and the wind guide blades of the tower fan of the utility model enables the airflow entering the tower fan to be pre-guided when passing through the wind guide channel. Such pre-guiding helps the airflow to flow into the interior of the tower fan more efficiently, thereby eliminating the eccentric vortex that may have been formed around the wind wheel, improving the wind intake efficiency of the tower fan, and ensuring that the tower fan can cover a wider area during operation, bringing more uniform cool breeze to users.

[0021] Secondly, the wind guide blades of the tower fan of the utility model allow the airflow to enter the wind guide channel without impact, reducing the wind resistance that may be generated when the airflow directly contacts the wind wheel. At the same time, because the wind guide channel corresponds to the wind duct inside the wheel, the airflow can flow smoothly into the inside of the wind wheel, reducing the noise caused by the impact of the airflow, and providing a quieter use environment for users. At the same time, the reduced wind resistance also means that the tower fan can be more energy-saving and reduce energy consumption during operation.

[0022] In addition, the wind guide channel of the tower fan of the utility model can not only accelerate the airflow, but also ensure that the airflow will not separate during the flow process, thereby reducing the turbulence of the airflow. This means that the airflow can maintain a more stable flow state when passing through the wind guide channel, reducing the noise and resistance caused by the turbulent airflow, and can effectively reduce the wear of the tower fan components and extend the service life of the tower fan. At the same time, since the airflow is more stable, the tower fan is also more stable during operation, reducing the noise caused by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 It is a three-dimensional schematic diagram of a tower fan of a typical embodiment of the utility model from a rear perspective.

[0025] Figure 2 It is a three-dimensional schematic diagram of a tower fan according to a typical embodiment of the utility model from a front perspective.

[0026] Figure 3 It is a partial structural schematic diagram of a tower fan of a typical embodiment of the utility model.

[0027] Figure 4 The figure is a cross-sectional schematic diagram of a tower fan according to a typical embodiment of the present invention.

[0028] Figure 5 The figure is a schematic structural diagram of the rear shell of a tower fan according to a typical embodiment of the utility model.

[0029] Figure 6 The figure is a cross-sectional schematic diagram of the rear shell of a tower fan according to a typical embodiment of the utility model. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0031] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may be intermediate elements. In addition, the "connection" or "coupling" used here may include wireless connection or wireless coupling. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0032] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0033] The utility model provides a tower fan. A plurality of wind guide blades are arranged on the air inlet of the tower fan. The wind direction is guided by the plurality of wind guide blades to eliminate the eccentric vortex generated by the eccentric arrangement of the wind wheel relative to the shell.

[0034] In a typical embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 The tower fan 100 includes a housing 110, a wind wheel 120, a motor (not shown) and a control unit. The wind wheel 120 and the motor are arranged in the housing 110. The output shaft of the motor is connected to the wind wheel 120. The control unit is electrically connected to the motor. The control unit controls the motor to rotate, so as to drive the wind wheel 120 to rotate through the motor, so that the wind wheel 120 rotates to form wind.

[0035] The shell 110 is provided with an air inlet 111 and an air outlet 112. External air enters the shell 110 from the air inlet 111, and the wind wheel 120 rotates to form wind, which is then discharged to the outside through the air outlet 112 to increase the air flow speed of the external environment and reduce heat.

[0036] Combination Figure 3 and Figure 4 The wind wheel 120 is eccentrically arranged relative to the housing 110, which can free up installation space in the housing 110 to facilitate installation of other parts in the housing 110, thereby miniaturizing the tower fan 100 and facilitating the placement and use of the tower fan 100.

[0037] In this embodiment, the tower fan 100 is further provided with a volute 141 and a volute tongue 142, and the volute 141 and the volute tongue 142 are arranged in sequence along the rotation direction of the wind wheel 120. The volute tongue 142 is used to break the circulation of the airflow inside the casing to ensure that the gas can flow out smoothly. The volute 141 is used to effectively collect the gas coming out of the wind wheel 120, so as to collect the scattered airflow to form a concentrated wind flow. Moreover, the collected airflow is directly blown to the external environment under the guidance of the volute 141 to achieve the purpose of cooling and ventilation.

[0038] In a typical embodiment of the utility model, since the wind wheel 120 is eccentrically arranged relative to the housing 110, an eccentric vortex is generated during the rotation of the wind wheel 120. The eccentric vortex will increase the wind resistance, reduce the air outlet efficiency of the tower fan 100, and increase the noise of the tower fan 100 during operation, thereby reducing the user experience.

[0039] To address this problem, the utility model provides a plurality of guide vanes 150 on the air inlet 111 of the shell 110. The guide vanes 150 guide the direction of the airflow entering the shell 110 to avoid the formation of eccentric vortices, thereby reducing wind resistance and noise and improving the user experience.

[0040] Specifically, combined Figure 5 and Figure 6 The guide blade 150 is disposed in the housing 110, the guide blade 150 protrudes toward the wind wheel 120, and the guide blade 150 is disposed on the air inlet 111 along the vertical direction of the tower fan 100. The plurality of guide blades 150 are sequentially spaced apart on the air inlet 111 along the circumferential direction of the tower fan 100.

[0041] In this implementation, combined with Figure 3 and Figure 4The wind wheel 120 is a crossflow wind wheel 120. The wind wheel 120 is provided with a plurality of blades 121, and the plurality of blades 121 are arranged around the central axis of the wind wheel 120 to form the wind wheel 120. The unscrewing direction of the plurality of blades 121 is opposite to the unscrewing direction of the plurality of wind guide blades 150, so that the wind guide blades 150 guide wind to the wind wheel 120.

[0042] Combination Figure 5 and Figure 6 Among the plurality of air guide blades 150, an air guide channel 160 is formed between two adjacent air guide blades 150; Figure 3 and Figure 4 Among the plurality of blades 121, an inner wheel air duct 122 is formed between two adjacent blades 121, and the plurality of blades 121 form a plurality of inner wheel air ducts 122. After the external airflow flows in through the air inlet 111, it flows through the air guide channel 160, the inner wheel air duct 122 and the air outlet 112 in sequence, and is output to the outside. When the wind wheel 120 rotates, the air guide channel 160 is opposite to different inner wheel air ducts 122 at different times, so that the air guide channel 160 guides the external air to the opposite inner wheel air duct 122, thereby eliminating the eccentric vortex, reducing wind resistance and noise, and improving the user experience.

[0043] Because the air inlet 111 is provided with a plurality of guide vanes 150, the guide vanes 150 will guide the airflow to the recirculation area of ​​the wind wheel 120, so that the recirculation airflow leaving the volute tongue 142 will flow back in advance without forming a vortex area in the wind wheel 120, so as to reduce wind resistance and improve the overall operating efficiency, so as to increase the air output volume.

[0044] Combination Figure 5 and Figure 6 The two ends of the air guide blade 150 are respectively a head end 151 and a tail end 152. The head end 151 of the air guide blade 150 is connected to the edge 1111 of the air inlet 111, and the tail end 152 of the air guide blade 150 is away from the air inlet 111 and close to the wind wheel 120. In this embodiment, the head end 151 of the air guide blade 150 is substantially vertically arranged to the edge 1111 of the air inlet 111, so that the external air can enter the air guide channel 160 without impact through the air guide blade 150, so that the external air can flow into the wind duct 122 in the wheel.

[0045] The air guide channel 160 includes an inlet (the inlet is called an air guide inlet 161) and an outlet (the outlet is called an air guide outlet 162), the air guide inlet 161 is connected to the air inlet 111, the air guide outlet 162 is away from the air inlet 111, and the air guide outlet 162 is arranged close to the wind wheel 120.

[0046] Combination Figure 4The ends 152 of the plurality of air guide blades 150 are equidistantly arranged from the periphery of the eccentrically arranged wind wheel 120, so that the air guide outlets 162 of the plurality of air guide channels 160 formed by the plurality of air guide blades 150 are equidistantly arranged from the periphery of the wind wheel 120, thereby enabling the plurality of air guide channels 160 to uniformly output airflow to the wind wheel 120, thereby avoiding eccentric vortices caused by uneven airflow output by the plurality of air guide channels 160.

[0047] The opening width of the air guide inlet 161 is greater than the opening width of the air guide outlet 162. The opening width of the air guide inlet 161 is the distance between the head ends 151 of two adjacent air guide blades 150, and the opening width of the air guide outlet 162 is the distance between the tail ends 152 of two adjacent air guide blades 150. When external air enters the air guide inlet 161, since the opening width of the air guide inlet 161 is greater than the opening width of the air guide outlet 162, the external air will accelerate the convergence movement in the process of flowing to the air guide outlet 162, with less turbulence and no airflow separation, which can play the role of reducing air intake noise and reducing drag.

[0048] The opening width of the air guide inlet 161 is 2 times or more than the opening width of the air guide outlet 162. In this embodiment, it is recommended that the opening width of the air guide inlet 161 is 3 times the opening width of the air guide outlet 162. Preferably, the width of the air guide channel 160 is linearly transitioned from the air guide inlet 161 to the air guide outlet 162, so as to gradually increase the flow rate of the air in the air guide channel 160.

[0049] In a further embodiment, the opening angle of the air guide inlet 161 is greater than the opening angle of the air guide outlet 162. The opening angle of the air guide inlet 161 is the relative angle between the head ends 151 of two adjacent air guide blades 150, and the opening angle of the air guide outlet 162 is the relative angle between the tail ends 152 of two adjacent air guide blades 150. When the opening angle of the air guide inlet 161 is greater than the opening angle of the air guide outlet 162, the air guide inlet 161 can more easily inhale air through the air inlet 111, and the air can more easily flow from the air guide inlet 161 to the air guide outlet 162, thereby increasing the air intake amount and flow rate of the air guide channel 160. Preferably, in the air guide channel 160, the opening angle of the air guide inlet 161 and the opening angle of the air guide outlet 162 are in a linear transition relationship.

[0050] The in-wheel air duct 122 includes an inlet (referred to as the inlet 1221 ). When the wind wheel 120 rotates, the inlet 1221 may be opposite to the air outlet 162 of any air guide channel 160 , so that the in-wheel air duct 122 can receive the airflow output by the air guide channel 160 through the inlet 1221 .

[0051] In this embodiment, the opening width of the air guide outlet 162 is smaller than the opening width of the wheel inlet 1221, and the opening width of the wheel inlet 1221 is the distance between two adjacent blades 121. The opening width of the air guide outlet 162 is smaller than the opening width of the wheel inlet 1221, so that the wheel inlet 1221 can fully receive the airflow output from the opposite air guide outlet 162, avoiding the output airflow of the air guide outlet 162 from impacting the wind wheel 120, reducing wind resistance and noise, and also avoiding the airflow from flowing into the gap between the wind wheel 120 and the inner wall of the housing 110, thereby improving the wind output efficiency of the tower fan 100.

[0052] In a further embodiment, the opening angle of the inlet 1221 in the wheel is greater than the opening angle of the air guide outlet 162, and the opening angle of the inlet 1221 in the wheel is the relative angle between the two blades 121. Because the blades 121 follow the wind wheel 120 to make a rotational motion, the blades 121 have a certain circumferential speed. If the opening angle of the air guide outlet 162 is greater than the opening angle of the inlet 1221 in the wheel, the inlet 1221 in the wheel cannot fully receive the airflow output by the air guide outlet 162, which will cause the airflow output by the air guide outlet 162 to impact the wind wheel 120, increasing wind resistance and noise. The opening angle of the inlet 1221 in the wheel of the utility model is greater than the opening angle of the air guide outlet 162, so that the inlet 1221 in the wheel can fully receive the airflow output by the air guide outlet 162, avoiding the airflow from impacting the wind wheel 120, and reducing wind resistance and noise.

[0053] In this embodiment, it is recommended that the opening angle of the air guide outlet 162 is 4-8° smaller than the opening angle of the wheel inlet 1221, so that the wheel inlet 1221 can fully receive the airflow output from the air guide outlet 162. For example, the opening angle of the air guide outlet 162 is 25°, and the opening angle of the wheel inlet 1221 is 30°, and the airflow output from the outlet will flow out at a 25° tangent, and can enter the wheel wind duct 122 without impact, thereby reducing the impact speed of the airflow entering the wind wheel 120 and improving the working efficiency of the wind wheel 120.

[0054] In one embodiment, the guide blades 150 are arc-shaped plate-like structures. Since the wind wheel 120 is eccentrically arranged relative to the housing 110, and the ends 152 of the plurality of guide blades 150 are arranged at equal intervals from the outer periphery of the eccentrically arranged wind wheel 120, the length of each guide blade 150 is inconsistent, and the curvature of the plurality of guide blades 150 is negatively correlated with the length of the guide blades 150. For example, the longer the length of the guide blade 150, the smaller the curvature of the guide blade 150; the shorter the length of the guide blade 150, the greater the curvature of the guide blade 150.

[0055] In one embodiment, in combination Figure 1 and Figure 5 , the air inlet 111 is also provided with a plurality of ribs 1112, and the plurality of ribs 1112 are sequentially arranged on the air inlet 111 along the vertical direction of the tower fan 100. The plurality of air guide blades 150 are sequentially arranged on the air inlet 111 along the circumferential direction of the tower fan 100. The ribs 1112 and the air guide blades 150 are arranged perpendicular to each other. The plurality of ribs 1112 and the plurality of air guide blades 150 are mutually intersected vertically and horizontally to form a mesh structure, which prevents external objects from entering the interior of the tower fan 100 through the air inlet 111, thereby protecting the tower fan 100. Preferably, the plurality of air guide blades 150, the plurality of ribs 1112 and the housing 110 are integrally formed.

[0056] In one embodiment, in combination Figure 1 , Figure 2 and Figure 5 The housing 110 includes a front housing 113 and a rear housing 114. The air inlet 111 is provided on the rear housing 114, and the air outlet 112 is provided on the front housing 113. The plurality of air guide blades 150 are integrally formed with the rear housing 114 to facilitate manufacturing.

[0057] In summary, the tower fan of the utility model is provided with a plurality of wind guide blades on the air inlet, and the flow direction of the external air is guided by the wind guide blades to eliminate the eccentric vortex, reduce the wind resistance and noise, and improve the user experience.

[0058] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the above utility model. For example, the above features are replaced with the technical features of the utility model (but not limited to) with similar functions in the utility model of the utility model to form a technical solution.

[0059] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A tower fan, comprising a housing and a wind wheel, wherein the housing is provided with an air inlet and an air outlet, characterized in that: The wind wheel is eccentrically arranged relative to the shell, and is surrounded by a plurality of fan blades. The air inlet is provided with a plurality of air guide blades, and the air guide blades are protruded toward the wind wheel. The fan blades and the air guide blades are respectively rotated in opposite directions to each other; an inner-wheel air duct is formed between two adjacent fan blades, and an air guide channel is formed between two adjacent air guide blades, and the air guide channel is opposite to the inner-wheel air duct.

2. The tower fan according to claim 1, characterized in that: The ends of the plurality of wind guide blades are arranged at equal intervals from the outer circumference of the wind wheel.

3. The tower fan according to claim 1, characterized in that: The head end of the air guide blade is arranged substantially perpendicular to the edge of the air inlet.

4. The tower fan according to claim 1, characterized in that: The air guide channel includes an air guide inlet and an air guide outlet. The air guide outlet faces the in-wheel air duct. The opening width of the air guide inlet is greater than the opening width of the air guide outlet.

5. The tower fan according to claim 4, characterized in that: The opening angle of the air guide inlet is greater than the opening angle of the air guide outlet.

6. The tower fan according to claim 1, characterized in that: The air guide channel includes an air guide outlet, the in-wheel air duct includes an in-wheel inlet, the air guide outlet is opposite to the in-wheel inlet, and an opening angle of the in-wheel inlet is greater than an opening angle of the air guide outlet.

7. The tower fan according to claim 6, characterized in that: The opening width of the air guide outlet is smaller than the opening width of the inlet inside the wheel.

8. The tower fan according to claim 1, characterized in that: The air inlet is also provided with a plurality of ribs, which are arranged in sequence along the vertical direction of the tower fan, and the plurality of wind guide blades are arranged in sequence along the circumferential direction of the tower fan, and the wind guide blades are perpendicular to the ribs.

9. The tower fan according to claim 1, characterized in that: The air guide blade is an arc-shaped plate structure.

10. The tower fan according to claim 1, wherein: The shell includes a front shell and a rear shell, the air inlet is opened on the rear shell, the air outlet is opened on the front shell, and the plurality of air guide blades are integrally formed with the rear shell.

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