Summer bypass for heat recovery ventilation units

Abstract

There is provided a heat recovery ventilation unit comprising a first air flow path and a second air flow path and a heat exchanger in which the first air flow path is in heat exchange contact with the second air flow path; the unit further comprising an air flow path selector in the first air flow path which is arranged to select between the first air flow path and a third air flow path which bypasses the heat exchanger; wherein the air flow path selector is located between an inlet filter of the first air flow path and the heat exchanger. Providing the bypass selector between the filter and the heat exchanger, air is always filtered, even in the bypass mode, thus reducing particulate matter drawn into the building during bypass operation.

Description

Technical field [0001] The invention relates to a heat exchanger or heat recovery unit used in a ventilation system. The present invention particularly relates to the summer bypass device for this heat recovery unit. Background technique [0002] In many technologies, heat exchangers are used to transfer heat between two fluids. The invention particularly relates to gas heat exchangers, in which heat exchange takes place between two different gas streams. [0003] The ventilation system can be balanced or unbalanced. In an unbalanced system, air is drawn from the building (usually in certain areas of the building, such as kitchens and toilets) and exhausted to remove excess moisture and / or odors. This system relies on the flow of air entering through natural openings such as windows or vents under doors to naturally replace the extracted air. This system has been used well in buildings with poor airtightness in the past, because those buildings have enough natural openings to a...

AI Technical Summary

Problems solved by technology

But because the heat exchanger is not 100% effective, the temperature inside the room will gradually rise to match the outside temperature

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