Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1991-09-06
1994-09-06
Ford, John K.
Heat exchange
Movable heating or cooling surface
Rotary drum
165 29, 62175, 62184, 622284, 623246, 622387, 237213, F25B 2900, F25B 1300
Patent
active
053439350
ABSTRACT:
A multiple type air conditioning apparatus includes a refrigerant supply unit having a variable capacity compressor, at least two internal air conditioning units each having an internal heat-exchanger and a fan device, the internal heat-exchangers of the at least two air conditioning units being connected in parallel to one another, a first variable expansion valve for variably throttling refrigerant, fed from the compressor, flowing through one of the internal heat-exchangers, a second variable expansion valve for variably throttling refrigerant, fed from the compressor, flowing through the other internal heat-exchanger and a variable flow rate control unit arranged at one side of the internal heat-exchangers from which refrigerant flows into each internal heat-exchanger in a heating operation, for regulating a distribution of refrigerant flowing into each internal heat-exchanger. The first and second variable expansion valves, and the variable flow rate control unit are controlled to maintain the refrigerant super heating of each internal heat-exchanger at a respective constant value with accuracy in a cooling operation and to supply a sufficient amount of refrigerant to the refrigerating circuit thereby achieving an appropriate heating/cooling capacity.
REFERENCES:
patent: 4620423 (1986-11-01), Hopkinson et al.
patent: 4720982 (1988-01-01), Shimizu et al.
patent: 4766735 (1988-08-01), Gotou
patent: 4771610 (1988-09-01), Nakashima et al.
patent: 4878357 (1989-11-01), Sekigami et al.
patent: 4987747 (1991-01-01), Nakamura et al.
patent: 5050396 (1991-01-01), Ohkoshi et al.
Ford John K.
Kabushiki Kaisha Toshiba
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