| 摘要 |
A heating and ventilating fan comprises a frame, a volute and an electrical component box. The volute is mounted on the lower side of a top panel of the frame, the electrical component box is mounted on the upper side of the top panel, various regions are arranged between the volute and the top panel, and a circulating blower and a ventilating blower are arranged in the regions; the circulating blower and the ventilating blower are provided with air inlets, a first ventilating hole and a second ventilating hole, wherein the air inlets are arranged under the volute, the first ventilating hole is communicated with circulating fans in part of the top panel, and the second ventilating hole is communicated with ventilating fans in part of the top panel. An air path communicating the first ventilating hole with the second ventilating hole is arranged in the electrical component box. The heating and ventilating fan has the advantage that air volume can be guaranteed, and product thickness can be reduced. |
