Refrigeration – Cooler utilizing solidified gas
Patent
1998-05-13
2000-05-30
Capossela, Ronald
Refrigeration
Cooler utilizing solidified gas
62434, F25D 1702
Patent
active
060678143
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a method for cooling containers, wherein cold is generated in a primary circuit containing a cooling medium and is supplied via a heat exchanger to a cold carrier in a secondary circuit, where the secondary circuit's cold carrier flows into a container through a heat exchanger.
The invention also concerns a cooling system comprising a primary circuit with a cooling medium for generating cold, a heat exchanger for supply of cold from the cooling medium in the primary circuit to cold carrier in a secondary circuit, the secondary circuit comprising releasable couplings for connecting to a container, the container comprising a heat exchanger for WO93/23712 discloses a method for cooling containers, wherein cold is generated in a primary circuit containing a cooling medium and is supplied via a heat exchanger to a cold carrier in a secondary circuit, wherein the secondary circuit's cold carrier flows into a container through pipes with releasable couplings, transferring cold to the container through a heat exchanger, and wherein cold is stored in cold stores in the secondary circuit.
BACKGROUND OF THE INVENTION
There are previously known cooling systems for cooling containers in connection with transport of food such as fish and the like, where the cold is generated by a primary circuit and transferred to a secondary circuit. An appropriate cold carrier in the secondary circuit, normally brine, transfers the cold into transportable containers, thus cooling their contents. The containers are exposed to cooling in the cooling circuit for as long as possible, whereupon they are disconnected from the circuit for further transport, e.g. by trailer or rail, on the final stage of the journey to the recipient.
Another known method is the use of transport containers with a store of a cold carrier, e.g. ice or dry ice, where the ice or the dry ice is placed in the container together with the goods which require to be cooled, and give off their cold during that part of the transport when the container is not connected to the cooling circuit.
In the known cooling system there is a limit to how long a transport containers can be located outside the cooling system before the contents are warmed to an unacceptable temperature. Alternatively, the cooling medium in the form of ice or dry ice requires to be placed in the container manually or by other means at the same time as the goods are placed therein, which entails extra work and increased costs.
The object of the present invention is to provide a method for cooling containers and a cooling system where the containers can be kept cold in a simple manner without the supply of cold from the cooling system.
This object is achieved with a method and a cooling system of the type mentioned in the introduction, characterized by the features which are indicated in the claims.
SUMMARY OF THE INVENTION
In this patent application the terms "emit cold", "supply cold" and "transfer cold" are used instead of the more correct "supply heat", "emit heat" and "transfer heat". This terminology has been chosen in order to make the description easier to understand.
The invention therefore consists of a cooling system consisting of a primary circuit and a secondary circuit connected to a heat exchanger, where the cold is generated in the primary circuit in the known manner. The cold is transferred from the primary circuit to the secondary circuit via the heat exchanger, where the cold is passed to a container by means of a cold carrier. The secondary circuit has one or more cold stores for storage of cold and emission of cold in the event of an interruption in the cold supply. This interruption may be due to operational problems or a failure of the energy supply to the cooling system, or it may be an interruption in the cold supply resulting from the disconnection of the container from the cooling system.
In a preferred embodiment one of the cold stores is located inside the container, with the result that the container is self-sufficient in cold emission dur
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patent: 4695302 (1987-09-01), Tyree, Jr.
patent: 4751822 (1988-06-01), Viard
patent: 5177974 (1993-01-01), Uren et al.
Arons Edward M.
Capossela Ronald
Kvaerner ASA
Morris Robert W.
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