A method for killing pests in an affected area of a structure, comprises positioning a heat pump unit within an affected area of the structure, coupling a first end of an inlet hose to a faucet, and coupling a second end of the inlet hose to an inlet port of the heat pump unit. The inlet port supplies a flow of water received from the faucet to an evaporator component of the heat pump unit. The evaporator component transfers heat from the flow of water to a refrigerant and communicate the refrigerant to a condenser component of the heat pump unit. The condenser component generates heated air by transferring heat from the refrigerant fluid to air flowing through the condenser component. The heated air i emitted into the affected area in order to raise the temperature of the affected area to a target temperature greater than 120 degrees Fahrenheit.

A system and method of using a source of low-pressure refrigerant for a cryotherapy procedure. The system may generally include a fluid reservoir and a fluid flow path in thermal exchange with the fluid reservoir, the fluid flow path including a thermal exchange device in thermal exchange with the fluid reservoir, a compressor in fluid communication with the thermal exchange device, a condenser, a reversing valve located between the compressor and the condenser, and an expansion valve located between the condenser and the thermal exchange device. The method may include transferring a low-pressure refrigerant to a first fluid reservoir, reducing the temperature of the refrigerant within the first fluid reservoir, increasing the temperature of the refrigerant within the first fluid reservoir, and transferring the pressurized refrigerant from the first fluid reservoir to a second fluid reservoir.

A compressor (22) has a male rotor (52), a female rotor (54), and a housing (50). The housing has a first bore (114) and a second bore (116) respectively accommodating portions of the male rotor and the female rotor. The housing has an inlet (26), an outlet (28), an economizer port (150) along at least one of the first bore and the second bore, and an external port (46) communicating with the economizer port. The housing has a chamber (152) between the economizer port and the external port having a volume of at least 0.8 liter.

A compressor (22) has a male rotor (52), a female rotor (54), and a housing (50). The housing has a first bore (114) and a second bore (116) respectively accommodating portions of the male rotor and the female rotor. The housing has an inlet (26), an outlet (28), an economizer port (150) along at least one of the first bore and the second bore, and an external port (46) communicating with the economizer port. The housing has a chamber (152) between the economizer port and the external port having a volume of at least 0.8 liter.

This invention provides an isothermal turbo-compressor-expander-condenser-evaporator in a single integral arrangement that is suitable for a variety of compact arrangements, such as a window air-conditioner and/or automotive-based unit. This arrangement avoids the use of rotary fluid joints and maintains the entire fluid cycle, including compression, condensation, expansion and evaporation within a single rotating shaft-based structure, with the compressor/condenser section and the expansion/evaporator section separated from each other in separate spaces and/or plena by a rotating, insulated barrier disc and associated seal.

This invention provides an isothermal turbo-compressor-expander-condenser-evaporator in a single integral arrangement that is suitable for a variety of compact arrangements, such as a window air-conditioner and/or automotive-based unit. This arrangement avoids the use of rotary fluid joints and maintains the entire fluid cycle, including compression, condensation, expansion and evaporation within a single rotating shaft-based structure, with the compressor/condenser section and the expansion/evaporator section separated from each other in separate spaces and/or plena by a rotating, insulated barrier disc and associated seal.

A method for killing pests in an affected area of a structure, comprises positioning a heat pump unit within an affected area of the structure, coupling a first end of an inlet hose to a faucet, and coupling a second end of the inlet hose to an inlet port of the heat pump unit. The inlet port supplies a flow of water received from the faucet to an evaporator component of the heat pump unit. The evaporator component transfers heat from the flow of water to a refrigerant and communicate the refrigerant to a condenser component of the heat pump unit. The condenser component generates heated air by transferring heat from the refrigerant fluid to air flowing through the condenser component. The heated air i emitted into the affected area in order to raise the temperature of the affected area to a target temperature greater than 120 degrees Fahrenheit.

A preconditioned air unit for supplying preconditioned air to an aircraft parked on the ground, the preconditioned air unit comprising a main unit with a housing accommodating a flow duct with an air inlet for ambient air and an air outlet for connection to the parked aircraft, a blower connected with the flow duct for generation of an air flow from the air inlet toward the air outlet, and a plurality of compartments, each of which is configured for accommodation of a self-contained cooling module comprising at least one refrigeration system, each of which includes at least one compressor, at least one condenser, at least one expansion valve, and at least one evaporator connected in a flow circuit containing a refrigerant, and wherein each compartment is further configured so that the at least one evaporator interacts with the air flow in the flow duct when the self-contained cooling module is installed in the compartment, and wherein at least one self-contained cooling module is installed in the plurality of compartments.

The invention relates to a device for converting thermal energy of a low temperature into thermal energy of a high temperature by means of mechanical energy, and vice versa, comprising a rotor which is mounted so as to rotate about a rotational axis and in which a flow channel is provided for a working medium that circulates in a closed circuit process, said medium being conducted outwards, relative to the rotational axis, in a compression unit in order to increase pressure, and being conducted inwards, relative to the rotational axis, in an expansion unit in order to reduce pressure. At least one heat exchanger is provided for exchanging heat between said working medium and a heat exchange medium.

The invention relates to a device for converting thermal energy of a low temperature into thermal energy of a high temperature by means of mechanical energy, and vice versa, comprising a rotor which is mounted so as to rotate about a rotational axis and in which a flow channel is provided for a working medium that circulates in a closed circuit process, said medium being conducted outwards, relative to the rotational axis, in a compression unit in order to increase pressure, and being conducted inwards, relative to the rotational axis, in an expansion unit in order to reduce pressure. At least one heat exchanger is provided for exchanging heat between said working medium and a heat exchange medium.