Cross-flow fan

Abstract

The utility model discloses a cross-flow fan which aims at overcoming the defect that an existing fan is large in noise. The air conditioner comprises a shell, a control panel fixedly connected to the shell, an air duct plate, a motor and a cross-flow wind wheel, the cross-flow wind wheel is arranged in the air duct plate, the air duct plate is provided with an air duct air inlet and an air duct air outlet, and the shell is provided with a shell air inlet and a shell air outlet which directly face the air duct air inlet and the air duct air outlet. And the air duct plate is suspended and fixed in the shell through a fastener. Through the structure, the noise of the fan is further reduced, and the use feeling is improved.

Description

Technical Field

[0001] The utility model relates to the field of fans, and more specifically, to a cross-flow fan. Background Art

[0002] Cross-flow fans have the advantages of stable air output and uniform wind speed distribution. Compared with axial flow fans, they can blow wind far away under low noise conditions.

[0003] Crossflow fans include end inlet, side outlet and inlet and outlet in a plane perpendicular to the axial direction of the impeller. The latter has a greater advantage in generating high constant pressure and large air volume.

[0004] The present application aims to further reduce the noise of the existing cross-flow fan. Summary of the invention

[0005] The utility model provides a cross-flow fan, which can further reduce the vibration and noise caused by the fan.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A crossflow fan comprises a shell, a control panel fixedly connected to the shell, an air duct plate, a motor and a crossflow fan wheel, wherein the crossflow fan wheel is arranged in the air duct plate, the air duct plate has an air duct inlet and an air duct outlet, the shell is provided with a shell air inlet and a shell air outlet facing the air duct inlet and the air duct outlet, the air duct plate has a protrusion, the protrusion fits the shell, the protrusion is provided with fasteners, and the protrusion is suspended and fixed in the shell by the fasteners.

[0008] The shell contains a control panel, a motor, an air duct plate and a crossflow impeller. The motor provides power, the control panel controls the speed and gear of the motor, and the air duct plate and the crossflow duct generate a pressure difference to promote the generation of airflow. The present application enables the air duct inlet and the air duct outlet to face the air duct inlet and the air outlet of the shell, thereby reducing the air duct resistance and generating high-frequency vibration and noise caused by the friction of the air flow with the shell. The present application positions the air duct plate in a suspended manner, thereby reducing the contact area between the shell and the air duct plate. On this basis, a protrusion is provided to further reduce the contact surface between the shell and the air duct plate. The vibration transmitted from the air duct plate to the shell is reduced in the described manner.

[0009] Preferably, the air duct plate has a gap portion, the distance between the gap portion and the crossflow wind wheel is the smallest, and along the preset rotation direction of the crossflow wind wheel, the distance between the air duct plate wall behind the gap portion and the crossflow wind wheel gradually increases. In this way, the airflow can be guided, turbulence can be reduced, and the air volume can be increased.

[0010] Preferably, the crossflow impeller comprises a plurality of parallel arranged blades and impeller covers which are arranged at equal intervals along the circumferential direction, and along the length direction of the blades, the closer the blades are to the impeller cover, the larger the blades are. The blades closer to the impeller cover have stronger torsional resistance, and purposefully increasing the size of the blades there can reduce noise under the premise of a certain air volume.

[0011] Preferably, the cross-sectional shapes of the fan blades are similar at various locations, where similarity refers to the same shape but different sizes.

[0012] Preferably, the air inlet of the housing is a plurality of grilles provided on the housing. The structure is used to prevent the outside from intruding into the housing.

[0013] Preferably, a noise reduction speaker is also included, and the noise reduction speaker is electrically connected to the control board, and generates corresponding artificial noise reduction according to the gear position of the motor controlled by the control board.

[0014] Preferably, the artificial noise reduction has a frequency close to the noise generated by the cross-flow fan and has a phase difference of 180°. The structure reduces the noise generated by the cross-flow fan by using the artificial noise reduction to offset the fan noise.

[0015] Preferably, the control board has a wireless communication module, and the control board communicates with the terminal via the wireless communication module to control the working state of the motor.

[0016] Preferably, a buffer is provided on the fastener to provide damping to reduce vibration and noise transmitted from the air duct plate to the housing.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The transmission of vibration is limited by suspending the air duct plate, thereby reducing the vibration and noise of the cross-flow fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a front view of the utility model;

[0021] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0022] Figure 4 It is a three-dimensional diagram of the utility model after removing the shell;

[0023] Figure 5 yes Figure 4 Schematic diagram after removing the air duct plate and control panel;

[0024] In the figure:

[0025] Shell 1, shell air inlet 11, grille 111, shell air outlet 12, control panel 2, air duct plate 3, air duct air inlet 31, air duct air outlet 32, protrusion 33, motor 4, crossflow impeller 5, impeller cover 51, fan blades 52, fastener 6. DETAILED DESCRIPTION

[0026] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure and should not be understood as limitations on the present disclosure.

[0030] In the present disclosure, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present disclosure can be determined according to specific circumstances, and they cannot be understood as limitations on the present disclosure.

[0031] Example:

[0032] A crossflow fan, Figures 1 to 5 As shown, it includes a housing 1, a control board 2 fixedly connected to the housing 1, an air duct plate 3, a motor 4 and a crossflow fan 5. The crossflow fan 5 is arranged in the air duct plate 3. The output shaft of the motor 4 is fixedly connected to the crossflow fan 5 and passes through the air duct plate 3, and the output shaft is rotatably connected to the air duct plate 3 through a bearing.

[0033] Ginseng Figure 5As shown, the crossflow impeller 5 includes a plurality of parallel arranged blades 52 and an impeller cover 51 which are evenly spaced along the circumferential direction. Along the length direction of the blades 52, the closer the blades 52 are to the impeller cover 51, the larger they are. The blades 52 closer to the impeller cover 51 have stronger torsional resistance and stronger vibration resistance. Intentionally increasing the blades 52 there can reduce noise under the premise of a certain air volume. Among them, the cross-sectional shapes of the blades 52 at various locations are similar. The similarity refers to the same shape but different sizes. In this embodiment, the impeller cover 51 is located in the middle, and the blades 52 reinforce the middle part of the blades 52.

[0034] Ginseng Figure 3 As shown, the air duct plate 3 has an air duct inlet 31 and an air duct outlet 32, and the housing 1 is provided with a housing air inlet 11 and a housing air outlet 12 facing the air duct inlet 31 and the air duct outlet 32. The housing air inlet 11 is a plurality of grilles 111 opened on the housing 1. The structure is used to prevent the outside from intruding into the housing 1.

[0035] Ginseng Figure 2 , 3 As shown, the air duct plate 3 has a protrusion 33, which is formed by a sheet metal process. In some embodiments, there are multiple protrusions 33 along the height direction. The protrusion 33 fits the housing 1, and a fastener 6 is provided on the protrusion 33, which is suspended and fixed in the housing 1 by the fastener 6. In some embodiments, a buffer is provided on the fastener 6. The buffer provides damping to reduce the vibration and noise transmitted from the air duct plate 3 to the housing 1.

[0036] Ginseng Figure 3 As shown, the air duct plate 3 has a gap portion, and the distance from the gap portion to the crossflow wind wheel 5 is the smallest. Along the preset rotation direction of the crossflow wind wheel 5, the distance from the plate wall of the air duct plate 3 behind the gap portion to the crossflow wind wheel 5 gradually increases. In this way, the airflow can be guided, turbulence can be reduced, and the air volume can be increased.

[0037] It also includes a noise reduction speaker, which is electrically connected to the control board 2 and generates corresponding artificial noise reduction according to the gear position of the motor 4 controlled by the control board 2. The artificial noise reduction has a frequency similar to the noise generated by the cross-flow fan and has a phase difference of 180°. The structure uses artificial noise reduction to offset the fan noise, thereby reducing the noise generated by the cross-flow fan.

[0038] The control panel has a wireless communication module, and the control panel communicates with the terminal through the wireless communication module to control the working state of the motor. The surface of the housing 1 has a control button connected to the control panel 2. In some embodiments, the control panel can also realize control through the wireless communication module with an external endpoint device such as a mobile phone through a gateway transfer connection or direct connection with an Internet of Things protocol such as Bluetooth, cellular, zigbee, etc.

[0039] The shell 1 contains a control board 2, a motor 4, an air duct plate 3 and a crossflow impeller 5. The motor 4 provides power, the control board 2 controls the speed and gear of the motor 4, and the air duct plate 3 and the crossflow air duct generate a pressure difference to promote the generation of airflow. In the present application, the air duct inlet 31 and the air duct outlet 32 ​​are directly opposite to the shell air inlet 11 and the shell outlet 12, which reduces the air duct resistance while generating high-frequency vibration and noise caused by the air flow rubbing against the shell 1. In the present application, the air duct plate 3 is positioned in a suspended manner, which reduces the contact area between the shell 1 and the air duct plate 3. On this basis, a protrusion 33 is provided to further reduce the contact surface between the shell 1 and the air duct plate 3. The vibration transmitted from the air duct plate 3 to the shell 1 is reduced in the described manner.

[0040] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A crossflow fan, characterized in that: It includes a shell, a control panel fixedly connected to the shell, an air duct plate, a motor and a crossflow fan wheel, the crossflow fan wheel is arranged in the air duct plate, the air duct plate has an air duct inlet and an air duct outlet, the shell is provided with a shell air inlet and a shell air outlet facing the air duct inlet and the air duct outlet, the air duct plate has a protrusion, the protrusion fits the shell, the protrusion is provided with fasteners, and the protrusion is suspended and fixed in the shell through the fasteners.

2. A cross flow fan according to claim 1, characterized in that: The air duct plate has a gap portion, and the distance from the gap portion to the crossflow wind wheel is the smallest. Along the preset rotation direction of the crossflow wind wheel, the distance from the air duct plate wall behind the gap portion to the crossflow wind wheel gradually increases.

3. A cross flow fan according to claim 1, characterized in that: The crossflow impeller comprises a plurality of parallel arranged blades and impeller covers which are arranged at equal intervals along the circumferential direction. Along the length direction of the blades, the closer the blades are to the impeller covers, the larger the blades are.

4. A cross flow fan according to claim 3, characterized in that: The cross-sectional shape of the fan blade is similar everywhere.

5. A cross flow fan according to claim 1, characterized in that: The air inlets of the shell are a plurality of grilles opened on the shell.

6. A cross flow fan according to claim 1, characterized in that: It also includes a noise reduction speaker, which is electrically connected to the control board and generates corresponding artificial noise reduction according to the gear position of the motor controlled by the control board.

7. A cross flow fan according to claim 6, characterized in that: The artificial noise reduction has a frequency close to the noise generated by the cross-flow fan and has a phase difference of 180°.

8. The crossflow fan according to claim 1, characterized in that: The control board has a wireless communication module, and the control board communicates with the terminal through the wireless communication module to control the working state of the motor.

9. A cross flow fan according to any one of claims 1 to 8, characterized in that: The fastener is provided with a buffer piece.

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