Cross-flow fan

Abstract

The utility model discloses a cross flow fan relates to fan technical field, including volute, impeller and air bellow, and the volute is equipped with the air inlet end and the air outlet end, and the impeller rotatory installation is in the inside of volute and can self rotate, and the air bellow sealed communication installs in the air outlet end of volute, and the inside hollow is formed as the air duct, and the side edge adjacent with volute is equipped with a plurality of air outlet holes that are communicated with its internal air duct, and the opposite side that is equipped with the air outlet hole is equipped with a plurality of air inlet holes that are communicated with its internal air duct. The utility model discloses cross flow fan impeller wind enters the air bellow and is exported by the grating air outlet, expands the flow area of airflow in the equipment, and then promotes the air outlet area, and the blowing coverage is wide, forms wide area air supply, improves product use effect, and the additional air inlet hole forms double -way air intake, increases the air intake of unit time, promotes the air outlet efficiency, and the air inlet hole auxiliary suction airflow can effectively fill the area of airflow flow in the air bellow air duct, and improves the airflow flow field.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a cross-flow fan. Background Technology

[0002] A cross-flow fan, also known as a cross-flow fan, is an engineering term referring to a ventilation device that uses a multi-bladed, long cylindrical impeller through which airflow passes laterally. When the impeller rotates, the fluid flows through the blades twice and through the volute to form a flat airflow. It features adjustable axial length, uniform airflow, and low noise, but has limitations such as high pressure loss and low efficiency. Cross-flow fans are widely used in air conditioning, heaters, floor fans, electronic equipment cooling, vehicle ventilation, and industrial equipment cooling.

[0003] Traditional cross-flow fans typically consist of a volute and a built-in cross-flow impeller. The volute covers most of the impeller's circumferential area, leaving only a relatively narrow outlet. Their working principle is as follows: airflow is drawn in axially from both ends of the impeller; under the impeller's rotation, the airflow is accelerated and blown out through the narrow outlet of the volute. However, the direct exit of airflow from the narrow outlet results in concentrated airflow, making it difficult to achieve wide-area air delivery; furthermore, the single air intake method, relying solely on the volute inlet, necessitates increasing the impeller speed when a larger airflow is needed, leading to increased noise and high energy consumption.

[0004] Therefore, it is necessary to invent a cross-flow fan to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a cross-flow fan to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cross-flow fan, comprising: The volute has an air inlet and an air outlet. The impeller is rotatably mounted inside the volute and can rotate on its own. The bellows is sealed and connected to the air outlet end of the volute. The interior is hollow and forms an air duct. Several air outlet holes connected to the internal air duct are opened on one side adjacent to the volute, and several air inlet holes connected to the internal air duct are opened on the opposite side of the side with air outlet holes.

[0007] Furthermore, a motor is fixedly installed on the outside of the volute, and the output end of the motor is coaxially connected to the impeller.

[0008] Furthermore, the impeller is a multi-bladed long cylindrical impeller.

[0009] Furthermore, several air outlets are formed by opening a grille air outlet on the side of the bellows adjacent to the volute. The air outlet of the grille is fully covered with an air box and has one side of the air outlet.

[0010] Furthermore, the side of the volute is formed with an arc-shaped air guide side, which is used to guide the air inlet to the grille outlet.

[0011] The technical effects and advantages of this utility model are as follows: The impeller of the cross-flow fan draws air into the air box and outputs it through the grille outlet, expanding the airflow area within the equipment, thereby increasing the air outlet area, providing a wide air coverage, forming a broad-area air supply, and improving the product's performance.

[0012] The design incorporates additional air inlets to create dual-path air intake, increasing the air intake volume per unit time. This increases the overall air output while maintaining the same impeller speed, and reduces the impeller speed to achieve the same air output volume when only the air inlet is open. This, in turn, reduces motor energy consumption and equipment operating noise.

[0013] In addition, the air inlet helps to draw in airflow, which can effectively fill the areas where the airflow is not smooth in the air box duct, improve the airflow field, reduce eddies and resistance, reduce operating noise, and improve the stability of equipment operation. Attached Figure Description

[0014] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention.

[0016] Figure 3 This is a top sectional view of the structure of this utility model.

[0017] Figure 4 This is a top-view cross-sectional view of the airflow trajectory structure of this utility model.

[0018] In the diagram: 1. Volute; 2. Impeller; 3. Bellows; 4. Air inlet; 5. Air outlet; 6. Grille air outlet; 7. Air inlet hole; 8. Motor; 9. Arc-shaped air guide side. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] This utility model discloses a cross-flow fan that can be used in products such as air conditioner indoor units, air purifiers, fireplace heaters, and table fans.

[0024] like Figure 1 As shown, a cross-flow fan includes a volute 1 and an impeller 2. The impeller 2 is rotatably installed inside the volute 1, and a motor 8 is fixedly installed on the outside of the volute 1. The fixed installation of the motor 8 includes, but is not limited to, fixing with bolts. The output end of the motor 8 is coaxially connected to the impeller 2 to drive the rotation of the impeller 2 and realize the rotation of the impeller 2 to induce airflow. The volute 1 has an air inlet end 4 and an air outlet end 5 to realize the intake and exhaust of the induced airflow.

[0025] Impeller 2 adopts a multi-bladed long cylindrical impeller.

[0026] like Figure 1 As shown, the cross-flow fan also includes a wind box 3. One end of the wind box 3 is open and sealed to the air outlet 5 of the volute 1. The wind box 3 is fixed by means of bolts, among other things.

[0027] In some embodiments, the bellows 3 is a rectangular box.

[0028] like Figure 3 As shown, the hollow interior of the bellows 3 forms an air duct.

[0029] like Figure 1 As shown, the side of the bellows 3 adjacent to the volute 1 has several air outlet holes that are connected to its internal air duct to form a grille air outlet 6.

[0030] In some embodiments, the grille outlet 6 is fully covered by the air box 3, and one side of the grille outlet 6 is opened to improve the air outlet efficiency.

[0031] Specifically, the impeller 2 draws air into the air box 3 and outputs it through the grille outlet 6, expanding the airflow area within the equipment and thus increasing the air outlet area, resulting in a wide airflow coverage and forming a wide-area air supply. The length of bellows 3 can be customized according to actual use, making it flexible and cost-effective to adjust.

[0032] like Figure 3 and 4 As shown, the side of the volute 1 has an arc-shaped air guide side 9, which is used to guide the air inlet to the grille outlet 6, thereby guiding the air and reducing wind noise.

[0033] like Figure 2-4 As shown, the air box 3 has several air inlets 7 on the opposite side of the grille air outlet 6, which are connected to its internal air duct, to assist in air intake.

[0034] Specifically, the air inlet 4 and the air inlet 7 are dual-path air intakes, increasing the air intake volume per unit time, thereby increasing the total air output volume of the impeller 2 at the same speed. On the one hand, the total air output volume of the whole machine is increased under the condition that the impeller speed remains unchanged. On the other hand, when the same air output volume requirement is met by opening only the air inlet 4, the speed of the impeller 2 is reduced, thereby reducing the energy consumption of the motor 8 and reducing the operating noise of the equipment.

[0035] Specifically, an air inlet 7 is opened on the air box 3 and is located on the opposite side of the air outlet 6 of the grille. When the equipment is running, the air inlet 7 assists in the intake of airflow, which can effectively fill the area where the airflow is not smooth in the air duct of the air box 3, improve the airflow field, reduce eddies and resistance, reduce operating noise, and improve the stability of equipment operation.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cross-flow fan, characterized in that, include: The volute has an air inlet and an air outlet. The impeller is rotatably mounted inside the volute and can rotate on its own. The bellows is sealed and connected to the air outlet end of the volute. The interior is hollow and forms an air duct. Several air outlet holes connected to the internal air duct are opened on one side adjacent to the volute, and several air inlet holes connected to the internal air duct are opened on the opposite side of the side with air outlet holes.

2. The cross-flow fan according to claim 1, characterized in that: A motor is fixedly installed on the outside of the volute, and the output end of the motor is coaxially connected to the impeller.

3. A cross-flow fan according to claim 1, characterized in that: The impeller is a multi-bladed long cylindrical impeller.

4. A cross-flow fan according to claim 1, characterized in that: The air outlet is formed by several air outlet holes on the side of the bellows adjacent to the volute. The air outlet of the grille is fully covered with an air box and has one side of the air outlet.

5. A cross-flow fan according to claim 4, characterized in that: The side of the volute has an arc-shaped air guide side, which is used to guide the air inlet to the air outlet of the grille.

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