Cross-flow tower fan

Abstract

A cross-flow tower fan comprises a base, a fan blade assembly rotationally arranged on the base, an air inlet grid plate and an air outlet grid plate which are arranged on the base and located on the two radial sides of the fan blade assembly respectively, and further comprises a guide vane assembly which is provided with a plurality of guide vanes. The multiple guide blades are located between the fan blade assembly and the air outlet grid plate, and the air outlet grid plate is provided with an air outlet grid. The distance between every two adjacent guide vanes is two times that between every two adjacent air outlet grilles. Due to the fact that the distance between every two adjacent guide vanes is two times that between every two adjacent air outlet grids, secondary acceleration of high-speed airflow entering the guide vanes can be prevented, and larger wind resistance and noise can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air supply devices, and more specifically to a cross-flow tower fan. Background Art

[0002] Crossflow tower fans are small in size, easy to use, and provide gentle air flow, so they are widely used in household life.

[0003] When the cross-flow tower fan is in operation, the existence of eccentric vortex causes uneven air supply angle. The means to solve the above uneven air supply in the prior art is usually to set an additional vertical air outlet grille inside the cross-flow tower fan. Then, because the airflow in the cross-flow tower fan has a certain degree of deflection as a whole, the delivered gas is easy to collide with the grille ribs, resulting in large resistance and impact noise caused by airflow separation, and the problem of skewed air supply angle still cannot be fundamentally solved.

[0004] Therefore, the industry needs to provide an improved cross-flow tower fan to overcome the above-mentioned defects of the prior art. Utility Model Content

[0005] The utility model aims to solve the above problems and provides a cross-flow tower fan.

[0006] In order to meet the purpose of the utility model, the utility model adopts the following technical solutions:

[0007] A cross-flow tower fan comprises a base, a fan blade assembly rotatably arranged on the base, and an air inlet grille plate and an air outlet grille plate arranged on the base and respectively located on both radial sides of the fan blade assembly, and also comprises a guide vane assembly, the guide vane assembly has a plurality of guide vanes, the plurality of guide vanes are located between the fan blade assembly and the air outlet grille plate, the air outlet grille plate has an air outlet grille; the spacing between two adjacent guide vanes is twice the spacing between two adjacent air outlet grilles.

[0008] Preferably, the guide vane assembly further comprises a bottom plate, the plurality of guide vanes are fixedly mounted on the bottom plate, and the bottom plate is fixedly mounted on the base. Further preferably, the plurality of guide vanes are evenly distributed along the circumference of the wind vane assembly.

[0009] Preferably, each guide vane of the plurality of guide vanes has the same radial spacing from the circumferential surface of the wind blade assembly, and the radial spacing is in the range of 5 mm-15 mm.

[0010] Preferably, each guide vane of the plurality of guide vanes has an arc-shaped cross-section, and each guide vane extends tangentially along the circumference of the wind wheel assembly.

[0011] Preferably, each of the plurality of guide vanes has a leading edge close to the fan blade assembly, and a line connecting two adjacent leading edges and the axis of the fan blade assembly forms an equal angle, which is between 15 and 25 degrees.

[0012] Further preferably, it also includes a volute tongue guide plate and a volute case guide plate arranged between the air outlet grille plate and the fan blade assembly. The air outlet grille plate has an upstream end and a downstream end along the rotation direction of the fan blade assembly; the volute tongue guide plate is located at the downstream end, and the volute case guide plate is located at the upstream end.

[0013] Preferably, the volute tongue guide plate has a volute tongue portion extending from the downstream end toward the upstream end; the ratio of the spacing between the volute tongue portion and the circumferential surface of the fan blade assembly to the diameter of the fan blade assembly is in the range of 10%-15%.

[0014] Preferably, the volute tongue guide plate has a pair of supporting walls connected to the downstream end of the air outlet grille plate and the volute tongue portion connecting the pair of supporting walls.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0016] In the cross-flow tower fan provided by the utility model, since a guide vane assembly is arranged inside the fan, the guide vane assembly has a plurality of guide vanes, and the plurality of guide vanes are located between the fan blade assembly and an air outlet grille plate, and the air outlet grille plate has an air outlet grille; since the spacing between two adjacent guide vanes is twice the spacing between two adjacent air outlet grilles, the high-speed airflow entering the guide vane can be prevented from undergoing secondary acceleration, thereby generating greater wind resistance and noise.

[0017] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 The present invention is a three-dimensional structural diagram of a cross-flow tower fan according to an embodiment of the present invention.

[0020] Figure 2 for Figure 1 The three-dimensional structural exploded view of the cross-flow tower fan is shown.

[0021] Figure 3 The present invention is a three-dimensional structural diagram of a guide vane assembly of a cross-flow tower fan according to an embodiment of the present invention.

[0022] Figure 4 This is a plan view of the structure of a cross-flow tower fan according to an embodiment of the utility model. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] It will be understood by those skilled in the art 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.

[0026] In one embodiment of the present invention, reference Figure 1-4 , a cross-flow tower fan 100 is provided, comprising a base 10, a fan blade assembly 20 rotatably disposed on the base 10, and an air inlet grille plate 60 and an air outlet grille plate 70 disposed on the base 10 and respectively located on both sides of the fan blade assembly 20 in a radial direction.

[0027] The base 10 serves as the installation base of the entire through-flow tower fan 100. Normally, the base 10 is placed on a support platform on a desktop or the ground or other occasions. The fan blade assembly 20 is the main component of the air supply device. The fan blade assembly 20 is electrically and mechanically connected to the motor (not shown). When the motor is running, the output shaft of the motor is fixedly connected to the rotating shaft of the fan blade assembly 20, thereby driving the fan blade assembly 20 to rotate relative to the base 10, and then can drive the rotation flow of the surrounding air, thereby realizing the air supply function. The fan blade assembly 20 generally has a cylinder and a group of fan blades radially distributed on the rotating shaft arranged in the cylinder. The fan blades have a specific shape. When the fan blades rotate, the surrounding air is driven to rotate, thereby forming a cyclone.

[0028] In the present invention, the cross-flow tower fan 100 further includes a guide vane assembly 30 , wherein the guide vane assembly 30 has a plurality of guide vanes 34 , and the plurality of guide vanes 34 are located between the fan blade assembly 20 and the air outlet grille plate 70 .

[0029] The air outlet grille plate 70 has an air outlet grille 76 ; the distance between two adjacent guide vanes 34 is twice the distance between two adjacent air outlet grilles 76 .

[0030] In the above embodiment, the spacing between the guide vanes 34 is twice the spacing between two adjacent air outlet grilles 76. In other words, the spacing between the guide vanes 34 is much larger than the spacing between the air outlet grilles 76. Since the guide vanes 34 are arranged near the fan assembly 20, the high-speed rotating airflow generated when the fan assembly 20 rotates first passes through the guide vanes 34. Since the spacing or gap between the guide vanes 34 is large, the wind resistance equivalent to the guide vanes 34 is very low, and the high-speed rotating airflow can smoothly pass through the large guide vane gap 34 and flow out to the air outlet grille 76. In this way, due to the low wind resistance, the noise generated by the high-speed rotating airflow is very small, so that the high-speed airflow entering the guide vanes 34 can be prevented from being accelerated twice, thereby generating greater wind resistance and noise.

[0031] Preferably, in one embodiment, the guide vane assembly 30 further includes a bottom plate 32, the plurality of guide vanes 34 are fixed on the bottom plate 32, and the bottom plate 32 is fixed on the base 10. Through this setting, the guide vanes 34 can be fixed, so that when the high-speed rotating airflow passes through the guide vanes 34, it will not produce too much impact.

[0032] The present invention does not specifically limit the distribution form of the guide vanes 34. In one embodiment, the plurality of guide vanes 34 are evenly distributed along the circumference of the fan blade assembly 20. This circumferential uniform distribution is not only convenient for processing and manufacturing the guide vane assembly 30, but also the uniform distribution form can make the high-speed rotating airflow generated by the fan blade assembly 20 flow evenly through the gap between two adjacent guide vanes 34 as much as possible, so as not to generate large noise, and the rotating airflow is relatively stable without generating too obvious turbulence.

[0033] In one embodiment, each of the plurality of guide vanes 34 has the same radial spacing from the circumferential surface of the fan blade assembly 20, and the radial spacing is in the range of 5 mm to 15 mm. This setting can ensure that the high-speed rotating airflow leaving the fan blade assembly flows substantially along the ray, thereby ensuring that the inlet angle designed by the guide vane 34 is effective.

[0034] Preferably, in order to achieve a better airflow guiding effect, reduce wind resistance and reduce noise, each of the plurality of guide vanes 34 can be designed to have an arc-shaped cross-section, and each guide vane 34 extends tangentially along the circumference of the wind wheel assembly 20. This setting can minimize the force of the head-on collision between the high-speed rotating airflow and the guide vane 34, thereby reducing wind resistance and noise. In addition, in order to further achieve the above technical effects, the guide vane 34 can also have a certain flexibility, so that when the airflow impacts the guide vane, the flexible deformation of the guide vane can produce a certain unloading and buffering effect on the impact, thereby further reducing wind resistance and noise.

[0035] Regarding the specific structural design of each guide vane 34, in one embodiment, the design may be as follows: each of the plurality of guide vanes 34 has a leading edge 342 close to the wind vane assembly 20, and an equal angle 222 is formed between the line connecting two adjacent leading edges 342 and the axis of the wind vane assembly 20, and the equal angle 222 is between 15 and 25 degrees. This design ensures that the two adjacent guide vanes 34 have the same spacing and the equal angle is set within the above range, which can optimize the flow path when the high-speed rotating airflow passes through the guide vane, ensure the reduction of turbulence, and also reduce wind resistance and flow noise.

[0036] In order to further guide the rotating airflow, the utility model further includes a volute tongue guide plate 40 and a volute guide plate 50 disposed between the air outlet grille plate 70 and the fan blade assembly 20. The two guide plates have a specific angle of guidance for the airflow, ensuring that the rotating airflow flows along a predetermined path.

[0037] Preferably, the air outlet grille plate 70 has an upstream end 72 and a downstream end 74 along the rotation direction of the fan blade assembly 20; the volute tongue guide plate 40 is located at the downstream end 74, and the volute case guide plate 50 is located at the upstream end 72. Further preferably, the volute tongue guide plate 40 has a volute tongue portion 42 extending from the downstream end 74 toward the upstream end 72; the ratio of the distance between the volute tongue portion 42 and the circumferential surface of the fan blade assembly 20 to the diameter of the fan blade assembly 20 is in the range of 10%-15%. This design helps to prevent the backflow airflow from directly impacting the volute tongue.

[0038] In one embodiment, the volute tongue guide plate 40 has a pair of support walls 44 connected to the downstream end 74 of the outlet grille plate 70 and the volute tongue portion 42 connecting the pair of support walls 14. The support wall 24 holds the volute tongue guide plate 40 at the downstream end 74 of the outlet grille plate 70, thereby enhancing the installation firmness of the volute tongue guide plate 40.

[0039] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0040] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A crossflow tower fan, comprising a base, a fan blade assembly rotatably disposed on the base, and an air inlet grille plate and an air outlet grille plate disposed on the base and respectively located on both sides of the fan blade assembly in a radial direction, characterized in that: It also includes a guide vane assembly, which has a plurality of guide vanes. The plurality of guide vanes are located between the wind vane assembly and the air outlet grille plate, and the air outlet grille plate has an air outlet grille. The spacing between two adjacent guide vanes is twice the spacing between two adjacent air outlet grilles.

2. The through-flow tower fan according to claim 1, characterized in that: The guide vane assembly also includes a bottom plate, the plurality of guide vanes are fixed on the bottom plate, and the bottom plate is fixed on the base.

3. The through-flow tower fan according to claim 1, characterized in that: The plurality of guide vanes are evenly distributed along the circumference of the wind blade assembly.

4. The through-flow tower fan according to claim 1, characterized in that: Each of the plurality of guide vanes has the same radial spacing from the circumferential surface of the wind blade assembly, and the radial spacing is in the range of 5 mm to 15 mm.

5. The through-flow tower fan according to claim 1, characterized in that: Each of the plurality of guide vanes has an arc-shaped cross section, and each guide vane extends tangentially along the circumference of the wind blade assembly.

6. The through-flow tower fan according to claim 1, characterized in that: Each of the plurality of guide vanes has a leading edge close to the wind blade assembly, and a line connecting two adjacent leading edges and the axis of the wind blade assembly forms an equal angle, which is between 15 and 25 degrees.

7. The through-flow tower fan according to claim 1, characterized in that: It also includes a volute tongue guide plate and a volute case guide plate which are arranged between the air outlet grille plate and the fan blade assembly.

8. The through-flow tower fan according to claim 7, characterized in that: The air outlet grille plate has an upstream end and a downstream end along the rotation direction of the fan blade assembly; the volute tongue guide plate is located at the downstream end, and the volute case guide plate is located at the upstream end.

9. The through-flow tower fan according to claim 8, characterized in that: The volute tongue guide plate has a volute tongue portion extending from the downstream end toward the upstream end; the ratio of the distance between the volute tongue portion and the circumferential surface of the fan blade assembly to the diameter of the fan blade assembly is in the range of 10%-15%.

10. The through-flow tower fan according to claim 9, characterized in that: The volute tongue guide plate comprises a pair of supporting walls connected to the downstream end of the air outlet grille plate and the volute tongue portion connecting the pair of supporting walls.

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