Refrigeration system
First Claim
1. A refrigeration system for a supermarket comprising:
- a refrigerated frozen food fixture for containing frozen foods;
a first stage scroll type compressor, a first stage evaporator coil and a first stage condenser coil connected together in a first stage closed loop refrigeration circuit, the first stage evaporator coil being adapted to maintain food in the refrigerated fixture in a frozen state;
a second stage compressor, a second stage evaporator coil and a second stage condenser coil connected together in a second stage closed loop refrigeration circuit, the second stage condenser adapted to reject heat into the atmosphere outside the supermarket;
a liquid heat transfer loop interconnecting the second stage evaporator and the first stage condenser to transfer heat from the first stage condenser to the second stage evaporator, the first stage condenser, first stage compressor and first stage evaporator all being located remote from the second stage evaporator;
an interior heat exchange device and a valve operable to divert the refrigerant in the second stage closed loop refrigeration circuit from the second stage condenser to the interior heat exchange device for interior supermarket heating purposes; and
an interior heat exchange device selectively connectable in the liquid heat transfer loop in parallel with the first stage condensor coil for interior supermarket cooling purposes.
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Accused Products
Abstract
A refrigeration system is disclosed having first stage and second stage compressors, first stage and second stage evaporator coils, and first stage and second stage condenser coils, each connected together to form first stage and second stage closed loop refrigeration circuits. The two circuits are coupled one to the other by a liquid (water, ethylene glycol of other good heat transfer medium) heat transfer loop which interconnects the second stage evaporator and the first stage condenser to transfer heat from the first stage condenser to the second stage evaporator. A plurality of additional refrigeration circuits may be provided, each including a compressor, an evaporator coil and a condenser coil connected together in a closed loop. In such a case, the liquid heat transfer loop may interconnect the second stage evaporator and each condenser of the additional refrigeration circuits to transfer heat from each additional refrigeration circuit condenser to the second stage evaporator, or may interconnect each second stage evaporator with the first stage condensers to provide a measure of redundancy. Completely separated refrigeration circuits operating in distinct temperature ranges are also disclosed.
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Citations
21 Claims
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1. A refrigeration system for a supermarket comprising:
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a refrigerated frozen food fixture for containing frozen foods; a first stage scroll type compressor, a first stage evaporator coil and a first stage condenser coil connected together in a first stage closed loop refrigeration circuit, the first stage evaporator coil being adapted to maintain food in the refrigerated fixture in a frozen state; a second stage compressor, a second stage evaporator coil and a second stage condenser coil connected together in a second stage closed loop refrigeration circuit, the second stage condenser adapted to reject heat into the atmosphere outside the supermarket; a liquid heat transfer loop interconnecting the second stage evaporator and the first stage condenser to transfer heat from the first stage condenser to the second stage evaporator, the first stage condenser, first stage compressor and first stage evaporator all being located remote from the second stage evaporator; an interior heat exchange device and a valve operable to divert the refrigerant in the second stage closed loop refrigeration circuit from the second stage condenser to the interior heat exchange device for interior supermarket heating purposes; and an interior heat exchange device selectively connectable in the liquid heat transfer loop in parallel with the first stage condensor coil for interior supermarket cooling purposes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A refrigeration system comprising:
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a refrigerated fixture for the refrigeration of foods; a first stage compressor, a first stage evaporator coil and a first stage condensor coil connected together in a first stage closed loop refrigeration circuit, the first stage compressor, condensor, and evaporator being located at the refrigerated fixture and the first stage evaporator coil being adapted to maintain the food in the refrigerated fixture within a desired temperature range; a second stage compressor, a second stage evaporator coil and a second stage condensor coil connected together in a second stage closed loop refrigeration circuit, the second stage compressor, condensor, and evaporator being located in a remote environment; and a liquid heat transfer loop extending between the refrigerated fixture and the remote environment and interconnecting the second stage evaporator and the first stage condenser in continuous communication to transfer heat from the first stage condenser to the second stage evaporator. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A supermarket refrigeration system comprising:
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a first stage compressor, a first stage evaporator coil and a first stage condenser coil connected together in a first stage closed loop refrigeration circuit; a second stage compressor, a second stage evaporator coil and a second stage condenser coil connected together in a second stage closed loop refrigeration circuit, the second stage condenser adapted to reject heat into the atmosphere exterior to the supermarket; a liquid heat transfer loop interconnecting the second stage evaporator and the first stage condenser to transfer heat from the first stage condenser to the second stage evaporator at a location remote from the first stage condenser; an interior heat exchange device and a valve operable to divert the refrigerant in the second stage closed loop refrigeration circuit from the second stage condenser to the interior heat exchange device to transfer heat from the second stage evaporator to the interior heat exchange device for interior supermarket heating purposes; and an interior heat exchange device selectively connectable in parallel with the first stage condensor coil for interior supermarket cooling purposes.
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21. A supermarket refrigeration system comprising:
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a refrigerated fixture for the refrigeration of foods; a scroll type first stage compressor, a first stage together in a first stage closed loop refrigeration circuit, the first stage closed loop refrigeration circuit being located in close proximity to the refrigerated fixture and the first stage evaporator coil being adapted to maintain the food in the refrigerated fixture within a desired temperature range; an exterior heat exchange device located in a remote environment outside the supermarket for transferring heat to the exterior atmosphere; and a closed liquid heat transfer loop extending between the refrigerated fixture and the remote environment and interconnecting the exterior heat exchange device and the first stage condenser in continuous communication to transfer heat from the first stage condenser to the exterior heat exchange device.
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Specification