Fresh air and return air switching device

• Main Author: ZHOU JINGXIA
• Format: Patent
• Language: Chinese; English
• Published: 26.09.2023
• Subjects: ACTUATING-FLOATS; AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; VENTILATING; WEAPONS

The utility model relates to the technical field of ventilation equipment, in particular to a fresh air and return air switching device which comprises a fresh air and return air switching socket located in an air bellow, the fresh air and return air switching socket comprises an outer pipe and an inner pipe, the outer pipe and the inner pipe cover the position of an air opening of the air bellow, a gap is formed between the outer pipe and the inner pipe, and the outer pipe and the inner pipe are communicated with each other. A connecting part connected with the inner pipe is arranged in the inner pipe, and at least one air return opening is formed between the connecting part and the wall of the inner pipe. Compared with the prior art, the fresh air and return air switching device has the advantages that by arranging the switching structure, fresh air and return air can be synchronously controlled and switched conveniently, fresh air can be supplemented in time conveniently and can be controlled only through