Small fresh air fan

Abstract

A small fresh air fan comprises a machine shell, an old air exhaust system, a fresh air system and a heat exchanger arranged between the old air exhaust system and the fresh air system, wherein the old air exhaust system and the fresh air system are arranged in the machine shell, the old air exhaust system comprises an old air suction area and an old air exhaust area which are separately arranged, the fresh air system comprises a fresh air suction are and a fresh air exhaust area which are separately arranged, a fresh air heat exchange outlet and a fresh air heat exchange inlet are correspondingly formed in the heat exchanger to form a fresh air channel, and an exhaust air heat exchange inlet and an exhaust air heat exchange outlet are correspondingly formed in the heat exchanger to form an exhaust air channel; the average wind velocity of the section of the heat exchanger is 0.7-1.1 m/s, and wind resistance is 90-120 Pa. The small fresh air fan is high in space utilization rate, low in noise, capable of preventing blocking, high in fresh air volume, high in comfort level, good in energy saving effect and high in exhaust efficiency, and high-efficiency operation of the whole machine can be ensured.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a small fresh fan. Background technique [0002] In new buildings or existing buildings (such as residences, hotels, office buildings, shopping malls, schools, clean rooms, etc.), dust and dirty air will exist, mainly including physical hazards, chemical hazards, biological hazards and hypoxia hazards. Among them, the physical hazards mainly come from exhaust gases from power stations, factories, and automobiles, which contain a large amount of heavy metals. Chemical hazards mainly refer to formaldehyde, benzene, and toluene in the air (mainly from decoration, furniture paint and adhesives, etc.). Biological hazards mainly refer to bacteria and viruses in the air, which are the main sources of colds, flu, pneumonia, bronchitis, and skin diseases. Especially in smoggy weather, bacteria attach to dust and can survive longer and spread farther. The hazard of hypoxia mainl...

AI Technical Summary

Problems solved by technology

However, the existing fresh air system has the following shortcomings: (1) The space utilization rate is low, and the location of each component is unreasonable, resulting in a relatively large volume of fresh air fans; (2) The noise is high, which is not conducive to home installation; (3) The air volume of the fresh air is small, and the wind resistance is large, resulting in uneven air flow and low comfort

[0004] In addition, the structural layout of the exhaust system of the existing fresh air blower is unreasonable, and the space cannot be used rationally, which makes the structure of the unit relatively loose and increases the size of the whole machine; and the exhaust efficiency is low, the noise is high, and the heat recovery efficiency is low

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