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Abstract

The present invention relates to a defrost system for defrosting components on which frost is formed, where the defrost system comprises at least one compressor, whish compressor has a hot gas outlet, which is connected to condensing means, from where primarily liquid refrigerant is connected to pressure reduction means, from where the flushing refrigerant is led towards evaporator means. The object of the invention is to perform effective defrosting by a defrost system. This can be achieved if the defrost system is formed as an independent cooling system, where the condensing means are transmitting heat to the defrosting components, where the evaporator is cooperating with external cooling means or from the refrigeration system, enabling defrost without deflecting the main system. It can hereby be achieved that the defrost system can operate completely independent of another refrigeration system. All negative effects with traditional defrost operation of refrigeration systems are overcome by means of this solution where the defrost system operates as a system without any influence from the refrigeration system. Even the refrigeration media can be different so that the refrigeration system can be a CO2 system where the defrost system can operate with a traditional refrigerant as 134A. In this way, it becomes possible to build the defrost circuit with other pressure conditions than the refrigeration system. In fact, this defrost system is operating as a heat pump where the condensing heat from the heat pump is used for defrosting. The defrost system can only operate if the refrigerant after passing through the condensing means is sent through at least an expansion valve and evaporator means before the refrigerant is returned to a compressor. In this way, a waste of cooling energy is performed. This cooling energy could be used in combination with another refrigeration system. Depending on where in the world a system is operating, the evaporator from the defrosting system could be used as a part of an air condition system. Also in combination with refrigeration systems, the evaporator can be used in combination with condensing or sub cooling of refrigerant.

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First Claim