Mute cross-flow fan heater
By optimizing the blade structure and incorporating a disturbance plate, the axial flow heater reduces vortex noise, enhancing user comfort through reduced noise levels.
Patent Information
- Application Number
- CN202422535359.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The noise of the flow heater is high during operation, mainly due to the improper design of the volute shell and volute tongue, which increases the vortex noise, affecting the user's comfort.
The inclined blade design and the horizontal plate structure at the outlet end are adopted. The inclined blades reduce the pneumatic area of the same-phase pulsation, and the horizontal plate acts as a turbulent device to reduce noise, and combines the air guide plate to optimize the air flow path.
It effectively reduces the vortex noise of the flow heater and improves the user experience. It has a simple structure and is economical and practical.
Smart Images
Figure CN223104833U_ABST
Abstract
Description
Technical Field
[0001] The utility model mainly relates to a silent cross-flow heater.
Background Art
[0002] At present, as a new type of heating equipment, the cross-flow heater is widely used due to its advantages such as convenient use and simple operation. However, the noise generated during the operation of the cross-flow heater is generally high, which greatly affects the user's comfort.
[0003] The main components that generate vortex noise in the cross-flow heater are the volute and the volute tongue. When the impeller rotates, the air flow enters from the open end of the impeller, passes through the inside of the impeller, and is discharged into the volute from the other side grille. The design of the volute and the volute tongue will form vortices inside the impeller flow field. If these vortices deviate from the center of the impeller rotation axis, it will cause air flow disturbance, thus generating vortex noise. The magnitude of the vortex noise is affected by the design of the volute and the volute tongue. Improper design may lead to an increase in vortex noise. Therefore, in view of the noise problem of the cross-flow heater, a new structural solution is proposed.
Content of the Utility Model
[0004] To solve at least one of the above problems, the utility model proposes a new structural solution. A silent cross-flow heater adopts the following technical solutions:
[0005] A silent cross-flow heater includes a housing, a motor, and an impeller; the housing has a wind cavity, and the impeller is installed in the wind cavity; the motor is fixedly connected to the outside of the housing, and the rotating end of the motor penetrates into the wind cavity of the housing to be connected with the impeller;
[0006] A transverse plate is installed at the air outlet end of the wind cavity, and the air flow generated by the motor driving the impeller is disturbed by the transverse plate to reduce noise.
[0007] Preferably, the impeller includes blades and a positioning plate. The blades are inserted through the positioning plate to integrally fix the two; the blades are arranged circumferentially and obliquely on the positioning plate, and the blades are arranged at equal intervals so as to form air inlets between the blades.
[0008] Preferably, a wind guiding plate is installed at the bottom of the wind cavity, and the wind guiding plate bends towards the air inlet end of the housing to form a bent part.
[0009] Preferably, the transverse plate has a radian, and the middle position of the transverse plate bends and protrudes into the wind cavity.
[0010] Preferably, the cross-sectional length of the transverse plate is greater than the cross-sectional length of the wind guiding plate.
[0011] The beneficial effects of the utility model compared with the background art:
[0012] In order to reduce the vortex noise of the cross-flow fan, the structure optimizes the blade structure and sets the blades in an inclined shape. The inclined design of the blades can reduce the acting area of the in-phase pulsating aerodynamic force, thereby reducing the radiated noise. At the same time, a transverse plate is added at the air outlet end as a turbulizing device, which can immediately convert the laminar boundary layer on the back of the blade into a turbulent boundary layer, delay the separation of the boundary layer on the back of the blade, and reduce the eddy current noise. It has the advantages of simple structure, compact cooperation, and reasonable design; therefore, it is a product with excellent performance in both technology and economy.
Description of the Drawings
[0013] Figure 1 Schematic diagram of the silent cross-flow warm air blower in the preferred embodiment provided by the present utility model;
[0014] Figure 2 Exploded view of the structure of the silent cross-flow warm air blower in the preferred embodiment provided by the present utility model.
Detailed Embodiments
[0015] The following details the embodiments of the present utility model. The described embodiments are illustrated in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout.
[0016] In the present utility model, unless otherwise clearly specified and defined, terms such as "assembled", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected or connected through an intermediate medium, and it can be internally connected and communicated between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0017] The following further describes the specific embodiments of the present utility model in conjunction with the accompanying drawings of the specification, making the technical solutions and their beneficial effects of the present utility model clearer and more definite. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.
[0018] The preferred embodiment provided by the present utility model: As Figure 1 shown in Figure 2 a silent cross-flow warm air blower includes a housing 1, a motor 2, and a wind wheel 3; the housing 1 has a wind cavity 11, and the wind wheel 3 is installed in the wind cavity 11; the motor 2 is fixedly connected to the outside of the housing 1, and the rotating end of the motor 2 penetrates into the wind cavity 11 of the housing 1 to be connected to the wind wheel 3.
[0019] The wind wheel 3 includes blades 31 and a positioning plate 32. The blades 31 are inserted through the positioning plate 32 to fixedly connect the two into a whole. The blades 31 are arranged circumferentially and obliquely on the positioning plate 32. The inclined design reduces wind resistance. Moreover, the blades 31 are arranged at equal intervals to form air inlets between the blades 31. In this structure, the wind wheel 3 adopts a structure of 22 inclined blades 31. The air inlet is large, the impeller is larger than the traditional impeller, it sucks more air, increases the air volume of the heater, reduces noise, and improves the user experience.
[0020] A cross plate 12 is installed at the air outlet end of the air cavity 11. The airflow generated by the motor 2 driving the wind wheel 3 is disturbed by the cross plate 12 to reduce noise. The cross plate 12 has a curvature, and the middle position of the cross plate 12 bends and protrudes into the air cavity 11.
[0021] A wind guiding plate 13 is installed at the bottom of the air cavity 11. The wind guiding plate 13 bends towards the air inlet end of the housing 1 to form a bent portion 14. The cross-sectional length of the cross plate 12 is greater than the cross-sectional length of the wind guiding plate 13 to prevent the cross plate 12 from obstructing the air inlet of the air cavity 11.
[0022] The cross plate 12 adopts an arc structure, effectively reducing the vortices generated during air inlet and reducing wind noise.
[0023] The main components generating vortex noise in a cross-flow fan are the volute (equivalent to the housing in this solution) and the volute tongue (equivalent to the blades in this solution). When the wind wheel 3 rotates, the air flow enters from the open part of the wind wheel 3, passes through the inside of the wind wheel 3, and is discharged into the volute from the grille on the other side. The designs of the volute and the volute tongue will form vortices inside the flow field of the wind wheel 3. If these vortices deviate from the center of the rotation axis of the wind wheel 3, it will cause air flow disturbance, thereby generating vortex noise. The magnitude of the vortex noise is affected by the designs of the volute and the volute tongue. Improper designs may lead to an increase in vortex noise.
[0024] In order to reduce the vortex noise of the cross-flow fan, the structure of the blades 31 is optimized in this structure. The blades 31 are set to be inclined. The inclined design of the blades 31 can reduce the acting area of the in-phase pulsating aerodynamic force, thereby reducing the radiated noise. At the same time, a cross plate 12 is added at the air outlet end as a turbulent flow device, which can immediately convert the laminar boundary layer on the back of the blades 31 into a turbulent boundary layer, delay the separation of the boundary layer on the back of the blades 31, and reduce the eddy current noise.
[0025] In the description of the specification, the description referring to terms such as "one embodiment", "preferably", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. The schematic description of the above terms in this specification does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Through the above description of the structure and principle, those skilled in the art should understand that the present utility model is not limited to the above specific embodiments. Improvements and substitutions using well-known technologies in the art based on the present utility model fall within the protection scope of the present utility model, which should be defined by each claim.
Claims
1. A silent cross-flow warm air blower, characterized in that: It includes a housing, a motor, and a wind wheel; the housing has a wind cavity, and the wind wheel is installed in the wind cavity; the motor is fixedly connected to the outside of the housing, and the rotating end of the motor penetrates into the wind cavity of the housing to be connected to the wind wheel; A transverse plate is installed at the air outlet end of the wind cavity, and the air flow generated by the motor driving the wind wheel is disturbed by the transverse plate to reduce noise.
2. The silent cross-flow warm air blower according to claim 1, characterized in that: The wind wheel includes blades and a positioning plate. The blades are inserted through the positioning plate to fixedly connect the two into a whole; the blades are arranged circumferentially and obliquely on the positioning plate, and the blades are arranged at equal intervals so as to form air vents between the blades.
3. The silent cross-flow warm air blower according to claim 1, characterized in that: A wind guide plate is installed at the bottom of the wind cavity, and the wind guide plate bends towards the air inlet end of the housing to form a bent part.
4. The silent cross-flow warm air blower according to claim 1, characterized in that: The transverse plate has a curvature, and the middle position of the transverse plate bends and protrudes into the wind cavity.
5. The silent cross-flow warm air blower according to claim 1, wherein: The cross-sectional length of the transverse plate is greater than the cross-sectional length of the wind guide plate.