Refrigeration – Automatic control – Of closed system sorbent type
Patent
1992-01-29
1993-11-09
Sollecito, John M.
Refrigeration
Automatic control
Of closed system sorbent type
62476, F25B 1500
Patent
active
052592022
ABSTRACT:
In an absorption air-conditioning system, in order to immediately stop indoor air-conditions by a stop signal of the indoor air-conditioners and improve characteristics for activating the system , such as, by effecting re-activation at a relatively short time interval after stopping the operation of the system, when the last one of the operating indoor air-conditioners is stopped, a stop signal is sent to a control device from a controller for the indoor air-conditioner, and in response to this signal, the control device effects the control of stopping a burner, a cooling medium circulating pump, a cooling water pump and a cold/hot water, pump. A solution circulating pump, however, continues operating and the solution, while kept at a high concentration, is circulated through an absorber, a high-temperature regenerator and a low-temperature regenerator. During this time, an indicated value of a temperature sensor gradually decreases, and when this value reaches a predetermined temperature, the control device switches a control valve from its open condition to its closed condition and another control valve from its closed condition to its open condition, and also activates the cooling medium circulating pump again to feed a cooling medium to a solution reservoir at a lower portion of the absorber, thereby diluting the solution.
REFERENCES:
patent: 3374644 (1968-03-01), Foster
patent: 3626710 (1971-12-01), Porter
patent: 4972679 (1990-11-01), Petty et al.
Aizawa Michihiko
Hisajima Daisuke
Nishiguchi Akira
Ohuchi Tomihisa
Hitachi , Ltd.
Sollecito John M.
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