Refrigeration – Reversible – i.e. – heat pump – External fluid flow reversed
Reexamination Certificate
1999-11-29
2001-04-17
McDermott, Corrine (Department: 3744)
Refrigeration
Reversible, i.e., heat pump
External fluid flow reversed
C062S428000
Reexamination Certificate
active
06216484
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air flow switching type air conditioner for both cooling and heating, and more particularly to an air conditioner for both cooling and heating which allows an efficient function of cooling and heating by optionally switching the indoor and outdoor air to flow either through an evaporator or through a condenser, and which can also serve as thermo-hygrostat.
2. Description of the Related Art
The conventional air conditioner for purpose of both cooling and heating had a construction equipped with both a cooling refrigeration cycle and a heater. Alternative type of air conditioner for both cooling and heating was constructed as a heat pump which has a heat exchanger at indoor side and another heat exchanger at outdoor side and directional valve for switching the flow of refrigerant. At cooling mode, the indoor heat exchanger functions as an evaporator to absorb heat from the room, and at heating mode, the indoor heat exchanger functions as a condenser to deliver heat into room. However, those conventional air conditioners for both cooling and heating were relatively complicated in structure and the cooling or heating efficiency was low, causing manufacturing and maintenance cost to increase.
SUMMARY OF THE INVENTION
The present invention, which is intended to resolve the drawbacks of the conventional air conditioners as described above, has the purpose of providing an air conditioner for both cooling and heating with novel structure, which can perform the function of cooling and heating by simply switching the direction of the air flow in and out of a room on a conventional cooling refrigeration cycle.
Furthermore, the present invention is intended to provide an air conditioner for not only cooling but also heating which can recover energy contained in the exhaust air during the indoor air ventilation and which can also precisely control or maintain the temperature and humidity in the room.
REFERENCES:
patent: 4199959 (1980-04-01), Wurm
patent: 4478053 (1984-10-01), Yano et al.
patent: 5372189 (1994-12-01), Tsunekawa et al.
patent: 5816066 (1998-10-01), Aoki et al.
patent: 0 738 857 (1996-10-01), None
patent: 363-197829 (1988-08-01), None
patent: 407-243660 (1995-09-01), None
patent: WO 93/18351 (1993-09-01), None
Bacon & Thomas PLLC
Jiang Chen-Wen
McDermott Corrine
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