Refrigeration – Reversible – i.e. – heat pump – With refrigerant collection and intermittent discharge
Patent
1998-04-22
2000-05-23
Wayner, William
Refrigeration
Reversible, i.e., heat pump
With refrigerant collection and intermittent discharge
62333, 16510424, 417208, F25B 2500, F04B 1924
Patent
active
060653027
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a heat transport system, which can be used as refrigerant circuitry for an air conditioning system, for example. More particularly, the present invention relates to a heat transport system for transporting at by circulating a heat transport medium without requiring driving source such as a pump.
BACKGROUND ART
As refrigerant circuitry for an air conditioning system, two-system refrigerant circuitry, such as that disclosed in Japanese Laid-Open Publication No. 62-238951, has conventionally been known. Refrigerant circuitry of this type includes: a primary refrigerant circuit in which a compressor, a heat exchanger on a first heat source side, a pressure reducing mechanism and a heat exchanger on a first application side are sequentially connected to each other through a refrigerant pipe; and a secondary refrigerant circuit in which a pump, a heat exchanger on a second heat source side and a heat exchanger on a second application side are connected to each other through a refrigerant pipe.
And, heat is exchanged between the heat exchanger on the first application side of the primary refrigerant circuit and the heat exchanger on the second heat source side of the secondary refrigerant circuit, and the heat exchanger on the second application side is disposed within a room to be air-conditioned.
In this refrigerant circuitry, during the room cooling running, a refrigerant is evaporated in the heat exchanger on the first application side and is condensed in the heat exchanger on the second heat source side. In the heat exchanger on the second application side, the condensed refrigerant exchanges heat with the indoor air and is evaporated, thereby cooling the indoor air.
On the other hand, during the room heating running, a refrigerant is condensed in the heat exchanger on the first application side and is evaporated in the heat exchanger on the second heat source side. In the heat exchanger on the second application side, the evaporated refrigerant exchanges heat with the indoor air and is condensed, thereby heating the indoor air.
In this way, the piping length of the primary refrigerant circuit is intentionally shortened, thereby trying to improve the refrigerating capacity.
However, in such an arrangement, a pump is required as a discrete driving source for circulating the refrigerant in the secondary refrigerant circuit. As a result, the power consumption and the like are increased. In addition, since such a driving source is required, the number of parts having such factors as to cause some failure is increased and thus the reliability of the entire system is adversely deteriorated.
As refrigerant circuitry for overcoming these problems, there exists a heat transport system of a so-called "non-powered" heat transport type, in which no driving source is provided for a secondary refrigerant circuit. The heat transport systems of such a type include a system disclosed in Japanese Laid-Open Publication No. 63-180022. In the heat transport system, the secondary refrigerant circuit is constructed such that a heater, a condenser and a sealed container are sequentially connected to each other through a refrigerant pipe and that the sealed container is disposed at a position higher than that of the heater. Moreover, the heater and the sealed container are connected to each other through an equalizer pipe including an opening/closing valve.
In such an arrangement, during the room heating running, the opening/closing valve is first closed. The gaseous refrigerant heated by the heater is condensed in the condenser so as to be liquefied. Then, the liquid refrigerant is recovered into the sealed container. Thereafter, the opening/closing valve is opened, the pressure in the heater is equalized by the equalizer pipe with the pressure in the sealed container, and then the liquid refrigerant is recovered from the sealed container, disposed at a position higher than that of the heater, to the heater.
By repeating this operation, the circulation of the refrigerant is enabl
REFERENCES:
patent: 2779171 (1957-01-01), Lindenblad
patent: 3285001 (1966-11-01), Turnblade
patent: 4576009 (1986-03-01), Ogushi et al.
Hori Yasushi
Maeda Tetsushi
Sada Shinri
Daikin Industries Ltd.
Robinson Eric J.
Studebaker Donald R.
Wayner William
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