Refrigeration – Automatic control – Of external fluid or means
Patent
1997-12-03
1999-10-19
Bennett, Henry
Refrigeration
Automatic control
Of external fluid or means
62119, 16510422, 16510425, 237 2A, 237 2B, F25B 502
Patent
active
059669543
ABSTRACT:
An air conditioning system comprises a heat source side unit adapted to condense and supply a fluid which can change a phase between a gas phase and a liquid phase and a plurality of user side units entirely or mostly disposed below the heat source side unit in terms of number and connected to said heat source side unit by piping so as to establish a circulation of the fluid supplied from said heat source side unit passing through said heat source side unit and said user side units by utilizing the difference in specific gravity between the liquid phase and the gas phase of said liquid so that it can provide a cooling/heating effect regardless of the floors where the user side units are installed and the power consumption rate of the system can be minimized. More specifically, the heat source side unit 1 and the user side units 4 arranged below the heat source side unit 1 are connected by way of liquid phase piping 6 and gas phase piping 7 to form a closed circuit 3 and a motor pump 10 is arranged along the liquid phase piping 6. Refrigerant R-134a is condensed in the heat source side unit 1 and sent to the user side units 4 by the motor pump 10 in the cooling mode of operation, whereas it is condensed in the user side units 4 and sent to the heat source side unit 1 by the motor pump 10 in the heating mode of operation. The number of revolutions per unit time of the motor pump is controlled modifying the number of poles of the pump or the frequency of the AC fed to the pump.
REFERENCES:
patent: 4664177 (1987-05-01), Edelstein
patent: 5050396 (1991-09-01), Ohkoshi et al.
patent: 5224352 (1993-07-01), Arima et al.
patent: 5293754 (1994-03-01), Mizuno
patent: 5819843 (1998-10-01), Inoue et al.
Japanese Patent Application Laid-Open No. 7-151359 supplied by applicant and laid out in the background of the invention, Jun. 13, 1995.
Arima Hidetoshi
Hatakeyama Akira
Idei Nobuhiro
Izumi Masashi
Takada Hiroyuki
Bennett Henry
Norman Marc
Sanyo Electronic Co., Ltd.
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