To provide an air conditioning ventilation system, that can be composed with a smaller space required, and at low cost by restricting the number of parts.
This air conditioning ventilation system is provided with a ventilation device 1 containing a ventilation fan and a ventilation heat exchanger, a ground heat exchanger, a heat pump 3, a circulation circuit, an indoor exhaust port 51, an outdoor exhaust port 52, an outdoor supply air port 53, an indoor supply air port 54, and a blow passage changeover means changeable between a first state to disconnect the outdoor supply air port 53 from the indoor supply air port 54 while maintaining the indoor exhaust port 51 connected to the outdoor exhaust port 52 and a second state to disconnect the indoor exhaust port 51 from the outdoor exhaust port 52 while maintaining the outdoor supply air port 53 connected to the indoor supply air port 54. For heating operation, the heat pump 3 is actuated, and the blow passage changing means is changed to the first state. In cooling operation, the blow passage changing means is changed to the second state without actuating the heat pump 3.
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Takeshi Sagi
Kenichi Homma