Air volume adjusting device and air volume adjusting method of alternating current fan and air draft equipment
A technology of air volume adjustment and fan, which is applied to mechanical equipment, parts of pumping devices for elastic fluids, machines/engines, etc. It can solve the problems of high noise reduction cost, different noise values, and inability to adapt to the installation environment of AC fans. , to achieve the effect of reliable noise reduction method and low noise reduction cost
Pending Publication Date: 2022-04-12
HANGZHOU ROBAM APPLIANCES CO LTD
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Problems solved by technology
However, the AC fan usually has only one resonance point, and the resonance point and the noise value generated in different installation environments are different, and different users have different acceptance levels for noise.
Therefore, the method of pre-calibrating the noise threshold cannot adapt to different installation environments, and does not consider the acceptance of noise by different users, and cannot achieve customized effects for each user.
In addition, both of the above two noise reduction methods require the installation of components such as sound collection devices to detect noise, which makes the noise reduction cost of the AC fan in the ventilation equipment high, inconvenient to install, and prone to misjudgment caused by external noise interference
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[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, every other embodiment obtained by those skilled in the art withou...
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The invention provides an air volume adjusting device and method of an alternating current fan and air draft equipment. The air volume adjusting device comprises a first controller and at least one semiconductor switch. For any semiconductor switch, the first end of the semiconductor switch is connected to a fan tap included in the first end of the alternating current fan, and the second end of the semiconductor switch is connected to a first sub-end included in the first end of the first controller; and the second end of the first controller, the third end of the semiconductor switch and the second end of the alternating current fan are respectively connected to the power supply circuit. Therefore, by arranging the first-stage air volume gear and the refined second-stage air volume gear under the first-stage air volume gear, refined adjustment of the air volume can be achieved, and the personalized adjustment requirements of different users are fully met; noise generated by the air draft equipment is changed by adjusting the air volume, resonance points do not need to be calibrated in advance, redundant assemblies do not need to be installed, noise interference is avoided, the noise reduction device adapts to differences of different installation environments, the noise reduction cost is low, and the noise reduction mode is reliable.
Description
technical field [0001] The present application relates to the technical field of ventilation equipment, in particular to an air volume adjustment device for an AC fan, a method for adjusting the air volume, and the ventilation equipment. Background technique [0002] At present, the ventilation equipment provides convenience for users in various aspects based on its own ventilation function. For example, the range hood can reduce the oil fume generated during the cooking process, and the ventilation fan can discharge the odor gas in the room; when the existing ventilation equipment is running The greater the air volume, the greater the noise, which seriously affects people's life experience. In order to reduce the adverse effects of noise, it is necessary to carry out noise reduction treatment on the ventilation equipment. [0003] The existing noise reduction method detects and analyzes the noise in the room, and generates a noise reduction signal with the same amplitude a...
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IPC IPC(8): F04D27/00F04D29/66
Inventor 任富佳孙君李娟张帆刘荣
Owner HANGZHOU ROBAM APPLIANCES CO LTD