Heating and cooling ventilating system with heat recovery

Claim 1

A ventilating system comprising: a cabinet; a heat exchanger utilizing boiling and condensation of a fluid mounted in said casing; a first air passage and a second air passage defined in said cabinet by a partition plate extending horizontally across said heat exchanger substantially in the center thereof; and at least one air sucking and exhausting fan mounted in one of said first air passage and said second air passage; wherein the improvement comprises: at least one auxiliary heat exchanger functioning as a cooler when space cooling is effected by said ventilating system and a heater when space heating is effected thereby; a ventilating port for effecting heat recovery and a ventilating port for allowing cooled air or heated air to flow therethrough formed in said cabinet to cooperate with one air duct communicationg with said first air passage; a ventilating port for effecting heat recovery and a ventilating port for allowing cooled air or heated air to flow therethrough formed in said cabinet to cooperate with another air duct communicating with said second air passage; a plurality of shutters, one of said shutters being mounted in said first air passage for alternately opening and closing said ventilating port for effecting heat recovery and said ventilating port for allowing cooled air or heated air to flow therethrough and the other shutter being mounted in said second air passage for alternately opening and closing said ventilating port for effecting heat recovery and said ventilating port for allowing cooled air or heated air to flow therethrough; and a plurality of ventilating ports for effecting cooling by ventilation and a plurality of ventilating ports for effecting heat recovery formed in said first air passage and a plurality of ventilating ports for effecting cooling by ventilation and a plurality of ventilating ports for effecting heat recovery formed in said second air passage; wherein said various ventilating ports are alternately opened and closed to suit the conditions of operating the ventilating system in a heat recovery mode, a cooling by ventilation mode, and a space cooling or space heating mode.