초록 ▼

A transport refrigeration system for heating and cooling a conditioned space is provided that includes an improved, combined heat exchanger and economizer for increasing the efficiency of the refrigeration cycle. The system includes a refrigerant compressor driven by an internal combustion engine th

A transport refrigeration system for heating and cooling a conditioned space is provided that includes an improved, combined heat exchanger and economizer for increasing the efficiency of the refrigeration cycle. The system includes a refrigerant compressor driven by an internal combustion engine that includes suction and discharge ports, and an intermediate pressure port; a refrigeration circuit including a heating coil and evaporator assembly thermally connected to the conditioned space, and a mode valve for selectively routing the refrigerant through either the heating coil or the evaporator assembly via a condenser to heat or cool the conditioned space, respectively. The combined heat exchanger and economizer includes a tube connected to the intermediate suction port of the compressor, a shell for conducting refrigerant to the evaporator assembly depending upon the position of the mode valve, and a jacket for circulating engine coolant. During the heating mode of the system, a volume of refrigerant is maintained in the shell of the combined heat exchanger and economizer to act as a thermal buffer for heat transferred between engine coolant circulating through the jacket, and refrigerant flowing through the tube of the device.

대표청구항 ▼

A transport refrigeration system for heating and cooling a conditioned space, comprising: a refrigerant compressor having a suction port and a discharge port and being driven by an internal combustion engine having a fluid coolant system; a refrigeration circuit including a heating coil and an evapo

A transport refrigeration system for heating and cooling a conditioned space, comprising: a refrigerant compressor having a suction port and a discharge port and being driven by an internal combustion engine having a fluid coolant system; a refrigeration circuit including a heating coil and an evaporator assembly thermally connected to a conditioned space; mode valve means for selectively routing refrigerant from said compressor discharge port in either a heating path to said heating coil or a cooling path to said evaporator assembly via a condenser, and a heat exchanger means upstream of said suction port of said compressor for transferring heat from coolant from said engine coolant system to refrigerant entering said suction port when said mode valve means routes refrigerant along said heating path, including a thermal buffer means for moderating the transfer of heat to said refrigerant from said coolant, wherein said heat exchanger means includes a tube means for conducting a flow of refrigerant to said compressor suction port, a shell means surrounding said tube means for containing and conducting refrigerant from said circuit, and a jacket means overlying said shell means for conducting a flow of engine coolant, and said thermal buffer means is formed from refrigerant contained in said shell means.