Refrigeration – Automatic control – Of closed system sorbent type
Patent
1996-04-09
1997-10-21
Doerrler, William
Refrigeration
Automatic control
Of closed system sorbent type
622383, F25B 1500
Patent
active
056784147
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an absorption cool-warm water machine (so called "absorption chiller heater") or an absorption refrigerating machine (in the present specification the absorption cool-warm water machine includes the absorption refrigerating machine) in which a high-quality fuel system and a exhaust-heat utility system are provided and a heat exchanger is provided to be charged with exhaust-heat from outside through the heat exchanger into the tubing of the exhaust-heat utility system. (In the present invention, the phrase, "warm water, can be replaced by a phrase, "hot water".)
BACKGROUND ART
As an absorption cool-warm water machine or an absorption refrigerating machine in which a high-quality fuel system and a exhaust-heat utility system are provided and a heat exchanger is provided to be charged with exhaust-heat from outside through the heat exchanger into the tubing of the exhaust-heat utility system, there is, for example, Japanese Patent Application No. 6-73428 previously filed by the present applicant.
Here, in the cool-warm water machine, there is a case in which a solution pump is interrupted in response to various signals (such as, a signal detecting a cool water temperature lower than a predetermined value) produced during an operation.
However, in the case of providing the heat exchanger, through which the exhaust-heat is charged from outside into the tubing of the exhaust-heat utility system, even after interrupting the solution pump, there is a case in which the exhaust-heat is charged from outside through the heat exchanger. In this case, the solution is not circulated, so that the solution inside the heat exchanger is inspissated, resulting in a fear that the solution will be crystallized in the heat exchanger. If the crystallizing is produced, the subsequent system to the heat exchanger cannot be used. Consequently, it is required to avoid producing crystallization, however, in a conventional art, an effective preventive measure has not been proposed yet.
The other well-known art will be further explained with reference to FIG. 23 (a drawing showing one of the embodiments of the present invention).
In the absorption cool-warm water machine, a vaporizer 2, an absorber 3, a condenser 4, a high-temperature regenerator 10 and an exhaust-heat heat-exchanger 20 are provided, in which cool-warm water is fed through a cool-warm water circulation line 5 to a cooling load (not shown). Further, a cooling water circulation line 6 is provided to feed cooling water to the absorber 3 and the condenser 4.
An exhaust-heat charge line 22 is provided to feed the exhaust-heat from an exhaust-heat line 21 to the heat-exchanger 20, in which a three valve V1 capable of adjusting the flow is provided at a confluent point of the exhaust-heat charge line 22 and the exhaust-heat line 21.
As a condition for the cool-warm water circulation line 5 in the aforementioned absorption cool-warm water machine 1, for example, a cool-warm water entrance-temperature TLin is adapted to be 12.degree. C., and a cool-warm water exit-temperature TLout is adapted to be 7.degree. C. The high-temperature regenerator 10 and a burner for combustion of high-quality fuel 11 provided to the high-temperature regenerator 10 are designed to meet a reference fixed by the aforementioned temperatures in a non-charging state of the exhaust-heat.
Comparing with an operation at the aforementioned condition or reference, there is a case for increasing the temperature of high-temperature regenerator 10. For example, when an over-load occurs in the cooling load connected to the cool-warm water circulation line 5, the cool-warm water entrance-temperature TLin becomes higher (e.g., 13.degree. C.) than 12 .degree. C. In order to control the cool-warm water exit-temperature TLout to be 7.degree. C. in the aforementioned over-load state, it is required to operate for high-load or over-load from a normal operation, so that the temperature of the high-temperature regenerator 10 increases more than (a required value) in the normal
REFERENCES:
patent: 4280331 (1981-07-01), Yoshii et al.
patent: 4380909 (1983-04-01), Sung
patent: 4498307 (1985-02-01), Hibino et al.
patent: 4589262 (1986-05-01), Nagao
patent: 4910969 (1990-03-01), Dalin et al.
Edera Masaru
Kojima Hiroshi
Nakamura Makoto
Oka Masahiro
Doerrler William
Tokyo Gas Co. Ltd.
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