The present invention relates to an air conditioner. In an air conditioner according to an embodiment, a scroll compressor having a refrigerating capacity of 23 kW to 58 kW and an amount of circulating refrigerant of 880 cc is used, a refrigerant mixture containing 50% or more of R32 is used as a refrigerant circulating the air conditioner, and a flexible stainless steel pipe having 1% or less of delta ferrite matrix structure on the basis of the grain size area is comprised in a refrigerant pipe. Therefore, the strength and hardness of the refrigerant pipe is maintained to be equal to or higher than those of a copper pipe, and the processability can be well maintained.

An appliance air/water handling system includes a rotating drum, airflow and fluid paths for directing process air and fluid, respectively, therethrough. First and second heat exchangers are in direct engagement with the airflow and fluid paths, respectively. A reversible refrigerant circuit delivers refrigerant through the first and second heat exchangers to alternatively define washing and drying conditions. In the washing condition the first heat exchanger cools the process air into cooled process air, and the second heat exchanger heats the fluid to define a heated fluid that is directed into the drum. In the drying condition the first heat exchanger heats the process air to define heated process air that is directed through the drum and through a third heat exchanger, and the second heat exchanger cools the fluid to define a cooled fluid that is directed to the third heat exchanger intersect with the heated process air.

Air sourced or water sourced packaged self-contained heat pump units having indoor and outdoor sections are provided. The heat pump unit distributes its total charge of refrigerant between a main refrigerant system and a refrigerant charge control system while keeping the total charge of refrigerant in the heat pump unit constant. The refrigerant charge control system has a refrigerant reservoir, an inlet conduit, and an outlet conduit that extends into the reservoir such that its lowest point is close to the bottom of the reservoir.

A heat pump system provides at least six modes of heating, cooling, and/or domestic water heating operation, where domestic water heating may occur concurrently with heating or cooling a space in a structure. The heat pump system comprises a desuperheater positioned downstream of the compressor and operable as a desuperheater, a condenser or an evaporator, a source heat exchanger operable as either a condenser or an evaporator, a load heat exchanger operable as either a condenser or an evaporator, a reversing valve positioned downstream of the desuperheater heat exchanger and configured to alternately direct refrigerant flow from the desuperheater heat exchanger to one of the load heat exchanger and the source heat exchanger and to alternately return refrigerant flow from the other of the load heat exchanger and the source heat exchanger to the compressor, and an expansion valve positioned between the load heat exchanger and the source heat exchanger.

A method for air-conditioning of watercraft and the like comprising the use of a device with: an electronically controlled variable-r.p.m. compressor, a main gas/water condenser (5), at least one environmental heat-exchanger (3) with an electronically controlled fan (14), at least one electronically controlled expansion valve (8), and at least one first electronic control unit (4) programmed for calculating continuously a temperature deviation detected (DeltaT=T_ad-T_a), and as a function of said temperature deviation regulating in combination, the r.p.m. of the compressor (1), opening of the flow valve (8), and the r.p.m. of the fan of the heat-exchanger (3).

An apparatus for air-conditioning of watercraft and the like comprising: an electronically controlled variable-r.p.m. compressor, a main gas/water condenser (5), at least one environmental heat-exchanger (3) with an electronically controlled fan (14), at least one electronically controlled expansion valve (8), and at least one first electronic control unit (4) programmed for calculating continuously a temperature deviation detected (DeltaT=T_adT_a), and as a function of said temperature deviation regulating in combination, the r.p.m. of the compressor (1), opening of the flow valve (8), and the r.p.m. of the fan of the heat-exchanger (3).

A method of operating a chiller having a closed refrigerant loop including a compressor, a condenser and an evaporator. The refrigerant used in the loop defining a pressure-enthalpy curve representative of different phases (vapor, liquid and vapor, and liquid) of the refrigerant at different combinations of pressure and enthalpy. The loop defining a process cycle (compression, condensation, expansion, and evaporation) of the refrigerant during operation of the loop relative to the pressure-enthalpy curve of the refrigerant. The method including continuously operating the compressor when a segment of the process cycle corresponds to the refrigerant being in the liquid phase.

The present invention relates to a gas heat pump and a control method therefor and, according to the present invention, the method for controlling a gas heat pump, which comprises an ignition plug and a gas engine having an engine combustion unit including a plurality of combustion spaces, may include: a target setting step of setting a target ignition energy amount on the basis of a refrigerant load amount determined according to a driving condition of the gas heat pump; an ignition step of igniting fuel injected into the combustion spaces; a comparison step of comparing an output energy amount emitted in the ignition step with a target ignition energy amount set in the target setting step; and a step of changing an energy amount required to ignite the fuel when the output energy amount and the target ignition energy amount do not coincide in the comparison step.

A cooling system of a vehicle, including a coolant circuit, which can be operated as a cooling circuit for an AC operation and as a heat pump circuit for a heating operation, an evaporator, a coolant compressor, a heat exchanger in the form of a coolant condenser or gas cooler for the coolant circuit or in the form of a heat pump evaporator for the heat pump circuit, a first expansion element which is paired with the evaporator, a second expansion element, the heat pump evaporator function of which is paired with the heat exchanger, and an inner heat exchanger with a high-pressure section and a low-pressure section. The low-pressure section is fluidically connected to the downstream coolant compressor. The high-pressure section of the inner heat exchanger is arranged in a coolant circuit section which connects the second expansion element to the heat exchanger.

An air source or water sourced packaged self-contained heat pump unit comprises indoor and outdoor sections. Heat exchangers present in these sections transfer heat between the indoor building space and the outdoor ambient. The heat exchangers are connected to form a closed loop and a compressor present in the loop pressurizes the refrigerant. A refrigerant charge control system present controls the charge of refrigerant in the main refrigerant system during heating and cooling modes. A hot-gas heat exchanger is added to the indoor section of the unit downstream of the indoor heat exchanger with respect to the airflow. Valves are used to bypass the flow of refrigerant from the compressor to the hot-gas heat exchanger during regular heating and cooling modes. In the hot-gas reheat mode, the compressed refrigerant is first directed to the hot gas heat exchanger which reheats the air to decrease the relative humidity. The charge control system is active during the hot gas reheat cycle to control the charge of refrigerant in the system.