Refrigeration – Refrigeration producer – Sorbent type
Reexamination Certificate
1999-07-12
2001-03-27
Doerrler, William (Department: 3744)
Refrigeration
Refrigeration producer
Sorbent type
C062S486000
Reexamination Certificate
active
06205810
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an absorption cooling apparatus that is used as an outdoor machine for an absorption air conditioning system and which cools the heat transfer medium used to activate the cooling operation of an indoor air conditioner. The invention particularly relates to an improvement of the mechanism for dispensing the liquid refrigerant.
Among the known absorption cooling apparatuses is the one that is described in the Unexamined Japanese Patent Application Publication No. Hei 1-134177 and which is applied to an absorption air conditioning system. The general layout of the cooling apparatus is shown in
FIG. 3. A
liquid refrigerant from a condenser
1
is forced by a pump
2
below the condenser
1
so that it is collected in a refrigerant reservoir
4
above an evaporator
3
; the liquid refrigerant is dispensed on through a multiple of holes in the bottom plate of the reservoir
4
to enter evaporation compartments
6
; the liquid refrigerant is evaporated on the peripheral surfaces of circulation pipes
7
penetrating the evaporation compartments
6
, whereupon the heat transfer medium passing through the circulation pipes
7
is cooled by the resulting heat of vaporization.
In the absorption cooling apparatus described above, the liquid refrigerant is collected in the refrigerant reservoir
4
above the evaporator
3
and the dispense holes
5
are distributed in the bottom plate of the reservoir
4
. If the evaporator
3
tilts in certain situations such as during the assembling and installation of the cooling apparatus, variations are prone to occur in the dispense of the liquid refrigerant through the holes
5
and the resulting variations in the cooling performance of the evaporating refrigerant in the evaporation compartments
6
can potentially reduce the cooling performance of the cooling apparatus. As a further problem, although the atmosphere in the evaporation compartments
6
is at low temperature and pressure, the passageway of the liquid refrigerant has high temperature due to contact with outdoor air and, hence, the circulating liquid refrigerant tends to evaporate before entering the evaporation compartments
6
, potentially leading to a lower efficiency in the supply of the liquid refrigerant.
The present invention has been accomplished under these circumstances and has as an object providing an absorption cooling apparatus which not only assures uniform dispensing of a liquid refrigerant within evaporation compartments but also prevents its evaporation before it enters the evaporation compartments, whereby the cooling performance of the cooling apparatus is enhanced.
SUMMARY OF THE INVENTION
This object of the invention can be attained by an absorption cooling apparatus comprising a plurality of evaporation compartments provided around a part of the circulation pipes through which a heat transfer medium circulates, a condenser for condensing the vapor of a refrigerant to a liquid refrigerant, a distributor for collecting the liquid refrigerant from the condenser, and a plurality of refrigerant dispense pipes which are connected to the distributor and which have distal end projecting into the evaporation compartments to dispense the outer surfaces of the circulation pipes with the liquid refrigerant collected in the distributor, so that the heat transfer medium circulating through the circulation pipes is cooled by the evaporation of the liquid refrigerant, wherein a nozzle is provided at the distal end of each of the refrigerant dispense pipes.
Since the distal end of each refrigerant dispense pipe is constricted, the streams of liquid refrigerant coming from the distributor are suppressed by the nozzles at the distal ends of the refrigerant dispense pipes so that the liquid pressure becomes uniform among those distal ends, from which the liquid refrigerant is dispensed into the evaporation compartments at a generally uniform pressure. Therefore, even if the cooling apparatus tilts during assembling or installation so that the quantity of the liquid refrigerant flowing out of the distributor varies from one dispense pipe to another, the liquid refrigerant can be dispensed from the distal ends of the individual dispense pipes onto the outer surfaces of the circulation pipes at a generally uniform pressure. As a result, the heat transfer medium passing through the circulation pipes is cooled uniformly by the evaporating liquid refrigerant.
The constricted distal ends of the refrigerant dispense pipes have an added advantage in that the liquid refrigerant within the dispense pipes exposed to elevated temperature and the liquid refrigerant at the sites upstream thereof are effectively isolated from the interior of the evaporation compartments located downstream that are filled with a low-temperature and pressure atmosphere. As a result, the evaporation of the liquid refrigerant is suppressed not only within the dispense pipes but also at the sites-upstream thereof.
REFERENCES:
patent: 3491545 (1970-01-01), Leonard, Jr.
patent: 3849232 (1974-11-01), Kessler et al.
patent: 4791790 (1988-12-01), Tongu
patent: 4872319 (1989-10-01), Tongu
patent: 5421173 (1995-06-01), Lee et al.
patent: 5794456 (1998-08-01), Ishiguro et al.
patent: 5802866 (1998-09-01), Ishiguro
patent: 5842351 (1998-12-01), Earhart, Jr.
patent: 5934086 (1999-08-01), Abe et al.
patent: 1-134177 (1989-05-01), None
patent: 10-26437 (1998-01-01), None
Ishiguro Katsusuke
Kamiya Hiroshi
Maruyama Akira
Doerrler William
Jones Melvin
Oliff & Berridg,e PLC
Paloma Industries Limited
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