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 measuring system for automatically determining and/or monitoring the quality of a liquid or viscous foodstuff, including a housing with an interior space for a product container for the foodstuff, the product container has a product space for the foodstuff and a lid provided with a probe with a thermometer, a heating and cooling device for the interior space, a sensor device for determining a non-temperature quality-related parameter value of the foodstuff, and a control unit designed to control the measuring system, measure, store, process and/or export the measured parameter values, and to control the heating and/or the cooling system according to a desired time-temperature program. The cooling system includes a cold buffer, a cooler for the cold buffer, and a separate refrigerant circuit. The cold buffer includes a buffer holder with a phase-transition material, wherein the refrigerant circuit includes a cooling circuit with a pump.

The reversed single-working-medium vapor combined cycle of the present invitation belongs to the field of thermodynamics, refrigeration and heat pump, which are consists of ten processes: a heat-absorption and vaporization process 1-2 of the M.sub.1 kg of working medium, a pressurization process 2-3 of the M.sub.1 kg of working medium, a heat-absorption process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 5-6 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 6-3 of the M.sub.2 kg of working medium, a heat-releasing process 6-7 of the M.sub.1 kg of working medium, a pressurization process 7-8 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 8-9 of the M.sub.1 kg of working medium, a depressurization process 9-1 of the M.sub.1 kg of working medium.

The HVAC On Demand Via High And Low Pressure Vortex Separation Apparatus With Rotating Spin Chamber is a novel heating and cooling system that could revolutionize the HVAC industry. The instant invention takes in ambient air, via ducted fans, and separates hot and cold air by spinning the air molecules into a self-contained vortex. Specifically, it allows the less dense hot air molecules to pass through the front of the invention while diverting the cold air molecules through a series of reversing tubes to exit the apparatus. As the main rotating spin chamber spins ambient airflow into a centrifugal vortex in one direction, the air inlet tubes are positioned in such a way that it allows the rotating spin chamber to revolve in the opposite direction of the interior vortex. This captures all mechanical energy on the inside and outside of the vortex. The apparatus takes otherwise wasted mechanical energy and converts it into additional electrical energy. The entire invention along with understanding how air separation on a molecular scale works, allows the invention to be scaled to any size and configuration for an incredibly high efficiency rate.

A process for conditioning air, by means of a main circuit, the main circuit being a vapor compression circuit, wherein a first refrigerant circulates, and a secondary circuit with no compressor, wherein a non-flammable second refrigerant including a hydrofluoroolefin and/or a hydrochlorofluoroolefin circulates, the main circuit and the secondary circuit being coupled to one another; the process including a heat exchange between the surroundings and the first refrigerant, a heat exchange between the first and second refrigerants, and a heat exchange between the second refrigerant and the air to be conditioned. Also, an air conditioning plant for implementing the process.

A system comprising a compressor, a first valve coupled to the compressor and to a first coil, a first expansion valve coupled to the first coil, and a second expansion valve. The second expansion valve coupled to a second coil. A second valve is coupled to the second coil and the compressor. A third valve is coupled to the compressor and a third coil. In response to receiving a heating demand that is below a threshold heating demand, a controller induces an artificial heating demand.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

A system comprising a compressor, a first valve coupled to the compressor and coupled to a first coil, a first expansion valve coupled to the first coil, a second coil, and a second expansion valve. The second expansion valve coupled to a third coil, a second valve coupled to the compressor and the third coil. A controller operable to operate the first valve, the first expansion valve, the second expansion valve, and the second valve. The second coil is coupled to the compressor and the refrigerant flows from the second coil to the compressor.

The invention relates to an electric vehicle cabin heating system and a control method. The system comprises a first refrigerant circuit and a second refrigerant circuit that are connected in parallel, wherein the circuits each comprise a gas-liquid separator and a compressor that are connected in series; the first refrigerant circuit further comprises a first expansion unit; the second refrigerant circuit further comprises a second expansion unit and a condenser; and the first expansion unit is connected to the second expansion unit and the condenser in parallel. Thus, rapid cabin heating and stable heating capacity are achieved, the dependence on a heater is eliminated, and an air-conditioning system is simplified. The method comprises: a refrigerant in the second refrigerant circuit undergoing pressure regulation via the second expansion unit and then entering the condenser to release heat for heating a cabin; and a refrigerant in the first refrigerant circuit undergoing throttling and pressure reduction via the first expansion unit and converges with the refrigerant in the second refrigerant circuit in the gas-liquid separator, and the converging refrigerant enters the compressor for cycling. Thus, the decoupling between the regulation of heating capacity and the temperatures and flow rate of exterior ambient air and cabin air is achieved, and the problems of insufficient heating capacity and frequent defrosting of a heat pump system at a low temperature are solved.