Refrigerant system with reheat refrigerant circuit
a refrigerant circuit and refrigerant system technology, applied in the field of refrigerant systems, can solve the problems of increasing the cost and complexity reducing and affecting the efficiency of the refrigerant system
Inactive Publication Date: 2010-12-09
CARRIER CORP
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Benefits of technology
[0010]A refrigerant system is provided that includes a cooling refrigerant circuit, a reheat refrigerant circuit, an evaporator fan, and a controller. The cooling refrigerant circuit includes an evaporator. The reheat refrigerant circuit includes a reheat coil. The evaporator fan is capable of forcing indoor air in a first direction and a second direction. The indoor air passes across the evaporator before the reheat coil in the first direction but passes across the reheat coil before the evaporator in the second direction. The controller, when in a conventional cooling mode, controls the reheat refrigerant circuit so that the reheat refrigerant circuit is not in fluid com
Problems solved by technology
It is also not uncommon for the moisture removed from the air to condense and frequently freeze on the external surfaces of the evaporator, which reduces the efficiency of the refrigerant system, and could also result in a refrigerant system malfunction.
As such, many refrigerant systems require specialized defrost systems and equipment (such as, for instance, electric heaters), which increase the cost and complexity of the refrigerant system.
Method used
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Embodiment Construction
[0019]Referring to the drawings, and in particular to FIG. 1, an exemplary embodiment of a refrigerant system according to the present disclosure, generally indicated by reference numeral 10, is shown.
[0020]Refrigerant system 10 includes a cooling refrigerant circuit 12, a reheat refrigerant circuit 14, and a bypass refrigerant circuit 16. Refrigerant system 10 is configured to utilize reheat refrigerant circuit 14 and bypass refrigerant circuit 16 during the defrosting of the evaporator.
[0021]Cooling refrigerant circuit 12 includes a compressor 18, a heat rejection heat-exchanger 20, an expansion device 22, and an evaporator 24, all in fluid communication with one another in a known manner to provide, for instance, a cooling or heating function using a known refrigerant (not shown). Refrigerant system 10 further includes a heat rejection heat-exchanger fan 26, an evaporator fan 28, and a refrigerant system controller 30.
[0022]Reheat refrigerant circuit 14 includes a reheat coil 32 ...
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A refrigerant system is provided that includes a cooling refrigerant circuit, a reheat refrigerant circuit, an evaporator fan, and a controller. The evaporator fan forces indoor air in a first direction and a second direction. The indoor air passes across the evaporator before the reheat coil, in the first direction, but passes across the reheat coil before the evaporator, in the second direction. The controller, when in a conventional cooling mode, controls the reheat refrigerant circuit so that the reheat refrigerant circuit is not in fluid communication with the cooling refrigerant circuit and controls the evaporator fan to force the indoor air in the first direction. Conversely, the controller, when in a defrost mode, controls the reheat refrigerant circuit so that the reheat refrigerant circuit is in fluid communication with the cooling refrigerant circuit and controls the evaporator fan to force the indoor air in the second direction.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present disclosure is related to refrigerant systems. More particularly, the present disclosure is related to refrigerant systems having defrost functionality provided by a reheat refrigerant circuit.[0003]2. Description of Related Art[0004]Refrigerant systems are utilized to control the temperature and / or humidity of air in various environments to be conditioned. In a typical refrigerant system operating in a conventional cooling mode, a refrigerant is compressed in a compressor and delivered to a heat rejection heat-exchanger (or, in many cases, an outdoor heat-exchanger). In the heat rejection heat-exchanger, heat is exchanged between outside ambient air and the compressed refrigerant, to remove heat from the compressed refrigerant.[0005]From the heat rejection heat-exchanger, the refrigerant passes to an expansion device, in which the refrigerant is expanded to a lower pressure and lower temperature, and then to...
Claims
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Login to View More IPC IPC(8): F25D21/06F25B39/04F25D17/06
CPCF24F3/153F25D21/125F24F2011/009F24F11/43
Inventor LIFSON, ALEXANDERTARAS, MICHAEL F.
Owner CARRIER CORP