Heat exchange – With timer – programmer – time delay – or condition responsive... – Having heating and cooling capability
Reexamination Certificate
2006-01-10
2006-01-10
Ford, John K. (Department: 3753)
Heat exchange
With timer, programmer, time delay, or condition responsive...
Having heating and cooling capability
C165S232000, C165S233000, C165S054000
Reexamination Certificate
active
06983794
ABSTRACT:
The present invention provides a heat exchanger unit that can appropriately inhibit freezing of a heat exchange element even in cold climates. The heat exchanger unit performes heat exchange and ventilation between an indoor space and an outdoor space, and is provided with a heat exchange element, a supply air passage and an exhaust air passage that are routed via the heat exchange element, a temperature sensor, and a control unit. The temperature sensor detects the outside air temperature. The control unit executes a first freeze inhibit control mode, which inhibits freezing of the heat exchange element, if the outside air temperature falls below a first level, and a second freeze inhibit control mode, which inhibits freezing of the heat exchange element more strongly than the first freeze inhibit control mode, if the outside air temperature falls below a second level, which is lower than the first level.
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Daikin Industries Ltd.
Ford John K.
Shinjyu Global IP Counselors, LLP
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