Refrigeration – Automatic control – Of external fluid or means
Patent
1982-05-11
1983-09-06
Capossela, Ronald C.
Refrigeration
Automatic control
Of external fluid or means
622386, 62434, 165 18, 165 48R, F25D 1700
Patent
active
044021909
ABSTRACT:
Modular apparatus for providing heating and cooling to large quantities of water used in a concrete batch plant prior to mixing water and concrete is disclosed. The system typically operates from a water source such as a deep well (10) which water source may serve as either a heat sink or a heat source. In addition, there is a water storage tank (34) which holds water (36) which water can be either heated or cooled as necessary for the best results in mixing concrete. There is a multiplicity (26) of modular reversable heat pumps each of which has its heat exchanger (78, 88) connected in parallel such that modular units may be added or removed without destroying the integrity of the refrigerant system. Each of the modular units includes a source heat exchanger (88) and a storage heat exchanger (78). A gaseous refrigerant compressor (70) is also provided and operates in conjunction with a reversing valve (80) such that the direction of refrigerant flow through the heating exchanger (78) and (88) may be reversed while at the same time the direction of refrigerant flow through the compressor (70) remains the same. There is further included a refrigerant expansion means (130) which also operates in combination with a fluid flow reversing bridge (104) such that the flow of fluid through the expansion valve is always in the same direction, even though the flow of refrigerant fluid through heat exchangers may be reversed. There is also included circuitry (66) which monitors and controls the operation of the reversable modular heat pumps to maintain the temperature of the storage water (36) in tank (34) at within a preselected temperature range.
REFERENCES:
patent: 3996759 (1976-12-01), Meckler
patent: 4191027 (1980-03-01), Inoue
patent: 4265094 (1981-05-01), Haasis, Jr.
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