Turbine box and ventilator

A ventilator, wherein the ventilator comprises:

• a ventilator body,
• a turbine, and
• a turbine box mounted to the ventilator body, the turbine box comprises:
• a main body, defining a first silencing chamber, a second silencing chamber, a third silencing chamber, an air inlet, and an air outlet;
• the first silencing chamber being communicated with the air inlet;
• the third silencing being communicated with the air outlet, each of the first silencing chamber and the second silencing being configured to accommodate a noise reduction assembly, the third silencing chamber being configured to accommodate a turbine blower, external airflow entering to the main body, and passing sequentially through the first silencing chamber, the second silencing chamber, and the third silencing chamber before entering the turbine blower;
• under an action of the turbine blower, the external airflow is transformed into an airflow with a target flow rate;
• a resonance plate, defining a first air hole and a second air hole allowing the external airflow to flow from the second silencing chamber into the third silencing chamber;
• the first air hole and second air hole being located on opposite sides of the turbine blower;
• and
• a resonance chamber wall, surrounding the third silencing chamber and together with the resonance plate to define the third silencing chamber, an airflow noise generated by the external airflow entering the third silencing chamber through the first air hole and the second air hole, as well as an vibration noise of the turbine blower, causing the resonance plate and the resonance chamber wall to form a resonance silencing structure to dampens both the airflow noise and the vibration noise.

A turbine box, comprising a main body containing a resonant silencing structure, the resonant silencing structure comprises:

• a resonance plate;
• a resonance chamber wall;
• and
• a silencing chamber formed by the resonance plate and the resonance chamber wall, the silencing chamber being configured to install a turbine blower, the silencing chamber being open to outside to receive external airflow, and under an action of the turbine blower, the external airflow is transformed into an airflow with a target flow rate;
• wherein the resonance plate defines a first hole and a second air hole;
• the first and second air holes are located on opposite sides of the turbine blower;
• an airflow noise generated by the external airflow entering the silencing chamber through the first air hole and the second air hole, along with an vibration noise generated by the turbine blower, induce a resonance effect between the resonance plate and the resonance chamber wall to dampens both the airflow noise and the vibration noise.