Refrigeration – Refrigeration producer – Sorbent type
Reexamination Certificate
1999-07-02
2001-07-24
Doerrler, William (Department: 3744)
Refrigeration
Refrigeration producer
Sorbent type
C062S485000, C062S494000
Reexamination Certificate
active
06263698
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an absorption type refrigerator in which an absorption cycle is formed with lithium bromide or the like as an absorption liquid medium, and particularly concerns to a dripping device improved so as to evenly drip the absorption liquid or refrigerant liquid over an absorption device or evaporator.
DESCRIPTION OF PRIOR ART BEHIND THE INVENTION
In an absorption type refrigerator, a regenerator is provided to boil a low concentration absorption liquid so as to separate a high concentration absorption liquid from a refrigerant vapor which is then condensed to form a refrigerant liquid. The high concentration absorption liquid is sprayed over an outer surface of an absorption pipe (absorption coil) of an absorption device. When the refrigerant liquid is sprayed over an evaporation pipe (evaporation coil) of an evaporator, the refrigerant liquid evaporates to cool the chilled water running through the evaporation pipe. Then, a pump is driven to feed the chilled water to a heat exchanger so as to provide a cooling medium source. The cooling water which gains the heat at the heat exchanger is cooled again at the evaporation pipe.
Meanwhile, the high concentration absorption liquid absorbs the refrigerant vapor to produce heat on the outer surface of the absorption pipe. The heat thus produced is released from a cooling tower through the cooling water which is fed to the cooling tower by means of the pump.
The absorption liquid which absorbed the refrigerant liquid to change into the low concentration absorption liquid in the absorption device, is pumped back to the regenerator so as to form an absorption cycle.
In a dripping device in which the absorption liquid or the refrigerant liquid is dripped to the absorption pipe or the evaporation pipe, there is provided a trough-shaped reservoir to circularly disperse the condensed refrigerant liquid or the high concentration absorption liquid toward the respective pipes to be dripped. A plurality of syphon pipes are further prepared by a sheet metal processing or tubing so as to pluralistically distribute the liquid in the trough-shaped reservoir, and drip the respective liquids downwardly due to the action of syphon.
The syphon pipes are firmly fixed to the trough-shaped reservoir by means of, for example, welding or press-fit procedure, and activated by adjusting wetting degree and surface tension so that the dripping action may not be influenced by fluctuations of the liquid level stored by the trough-shaped reservoir.
With the above structure, the liquid in the trough-shaped reservoir is dripped by the action of syphon. The action of syphon is greatly influenced by a configuration and surface property (oxidized degree) of the syphon pipe and variations induced when assembling the syphon pipe to the trough-shaped reservoir, thus inviting variations in an amount of the dripped liquid due to varied dripping performance. This blocks the dripping liquid from evenly dispersing over the respective pipes so as to induce variations on an absorption and evaporation capability, thus hindering a way to ensure a uniform performance on all absorption type refrigerators produced in the manufacturing processes.
In order to obviate the above drawbacks, it has been considered to previously heat the syphon pipe to change its oxidized degree to adjust the wetting property so as to equalize the amount of the dripping liquid when assembling the syphon pipe to the trough-shaped reservoir. This, however, reduces the productivity with the added adjusting procedures during the assembling process.
In addition, the trough-shaped reservoir is in an upper open ended structure so that its tilting degree significantly affects on the amount of the dripping liquid. In order not to change the liquid level in the trough-shaped reservoir in which the syphon pipes are each secured to the trough-shaped reservoir, it is necessary to install the trough-shaped reservoir strictly in parallel with the horizontal direction. This requires a demanding precision when adjusting horizontality, thus deteriorating the workability when installing the syphon pipes to the trough-shaped reservoir.
Therefore, the present invention has made with the above drawbacks in mind, it is a main object of the invention to provide a dripping device for an absorption type refrigerator which is capable of precisely dripping the liquid with a relatively simple structure while ensuring a stable refrigerating capability without inviting any substantial variations on an amount of the dripping liquid.
DISCLOSURE OF THE INVENTION
According to the present invention, there is provided a dripping device for an absorption type refrigerator comprising: a regenerator means provided to separate a refrigerant vapor from an absorption liquid including a refrigerant by heating the absorption liquid; a condenser provided to cool the refrigerant vapor so as to condense the refrigerant vapor which is separated from the regenerator means; an evaporator provided to evaporate a condensed refrigerant liquid under a lower pressure; an absorption means provided so that the refrigerant vapor evaporated by the evaporator is absorbed by the absorption liquid supplied by the regenerator means; a pumping means provided to return the absorption liquid from the absorption means to the regenerator means so as to form an absorption cycle with the regenerator, the condenser, the evaporator and the absorption means; a dripping device provided to drip the refrigerant liquid toward an evaporation pipe in the evaporator, or dripping the absorption liquid toward an absorption pipe in the absorption means; a liquid storage means provided to store the liquid to be dripped; a close-ended pipe positioned under the liquid storage means and placed above the evaporation pipe or the absorption pipe, so as to communicate with a lower end of the liquid storage means; and a liquid dispersing pipe having a plurality of holes located along the close-ended pipe so as to inject the liquid therethrough supplied from the liquid storage means.
With the absorption cycle thus provided, the refrigerant vapor separated from the absorption liquid is condensed to form the refrigerant liquid while the absorption liquid is heated to be concentrated at the regenerator.
The dripping device provided herein drips the refrigerant liquid toward an evaporation pipe in the evaporator, or dripping the absorption liquid toward an absorption pipe in the absorption means.
The refrigerant liquid and the absorption liquid each stored in the liquid storage means is supplied to the liquid dispersing pipe (close-ended pipe) from the lower end of the liquid storage means. Due to the fact that the plurality of outlet holes are provided with the liquid dispersing pipe along the close-ended pipe, the liquid is evenly distributed when the liquid is injected from the plurality of outlet holes.
With the liquid dispersing pipe located above the evaporation pipe or absorption pipe, the liquid injected from the plurality of outlet holes evenly spreads over the evaporation pipe or absorption pipe respectively.
The liquid spreading over the evaporation pipe gives heat to the refrigerant liquid to evaporate it, and the liquid spreading over the absorption pipe deprives heat of the refrigerant vapor to release the heat.
With the liquid dispersing pipe used by forming the plurality of outlet holes on the close-ended pipe, it is possible to distribute the liquid upon dripping it, thus eliminating the necessity of a multitude of sheet metal pieces to significantly reduce the manufacturing cost.
With the liquid dispersing pipe communicated with the liquid storage means to inject the liquid under the pressure head, it is possible to equalize the amount of liquid injected through the plurality of outlet holes without inviting variations depending on the outlet holes.
According to another aspect of the invention, the plurality of outlet holes are perforated through an upper surface of the liquid dispersing pipe to inject the dripped liquid upward.
Due
Kawamoto Kaoru
Marubashi Tsutomu
Watanabe Kaoru
Doerrler William
Morgan & Lewis & Bockius, LLP
Rinnai Kabushiki Kaisha
Shulman Mark
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