Heat recovering fresh air machine

Abstract

The invention discloses a heat recovering fresh air machine which comprises a return air inlet, a return air channel, a fresh air channel, a heat exchange core body, a wet film and a water mist spraying device, wherein the return air channel communicates with the return air inlet; the heat exchange core body is used for realizing heat exchange between return air in the return air channel and fresh air in the fresh air channel; the wet film is arranged in the return air channel and is located in a part between the return air inlet and the heat exchange core body; the water mist spraying device is arranged in the return air channel and is located in a part between the wet film and the heat exchange core body; in the heat exchange core body, fresh air and return air flow in a cross flow manner and are separated through a hydrophilic aluminum foil, the fresh air is in direct contact with one face of the hydrophilic aluminum foil while the return air is in contact with another face of the hydrophilic aluminum foil, and the wet film and water mist generated by the water mist spraying device form a liquid thin layer on the surface of the other surface of the hydrophilic aluminum foil. By adopting wet film pre-cooling combined with indirect evaporative cooling, the heat recovering efficiency is improved. Compared with a conventional sensible heat recovering fan, the all heat recovery efficiency in a refrigerating working condition in summer can be increased from 30% to 80%, and the sensible heat recovery efficiency is increased from 65% to 140%.

Description

technical field [0001] The invention relates to a fresh air blower, in particular to a heat recovery fresh air blower. Background technique [0002] With the rapid improvement of people's living standards, people pay more and more attention to the comfort and health of the indoor environment. While regulating the temperature and humidity of the air, there are also requirements for indoor air quality (IAQ). In this context, small household fresh air ventilators are being accepted and paid attention to by more and more families. [0003] In the indoor cooling and heating load, the fresh air load can often account for about 35%. For some particularly cold and hot areas, the indoor and outdoor temperature difference is large, and the fresh air load will account for a larger proportion of the entire air conditioning operating load. Under the social background of saving energy and reducing consumption, energy recovery has become an essential function of fresh air ventilators. U...

AI Technical Summary

Problems solved by technology

Although the full heat core has higher heat recovery efficiency than the sensible heat core, it has high cost, high running resistance, short life and cannot be cleaned

The metal heat recovery core should not allow moisture to pass through, so it cannot recover the energy of the latent heat in the return air, which greatly reduces the efficiency of the energy return air

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