The invention relates to a condenser of stacked-plate design, having a first flow duct for a refrigerant and having a second flow duct for a coolant.

The refrigeration cycle apparatus includes: liquid-side connection piping that extends from liquid-side refrigerant piping; gas-side connection piping that extends from gas-side refrigerant piping; a refrigerant storage tank that stores refrigerant, an intake side thereof being connected to the liquid-side connection piping, and a discharge side thereof being connected to the gas-side connection piping; an inlet-side electromagnetic valve that is disposed on the liquid-side connection piping, and that is opened when there is no passage of electric current; an inlet-side check valve that is disposed on the liquid-side connection piping, and that allows the refrigerant to flow only toward the refrigerant storage tank; and a valve apparatus that is disposed on the gas-side connection piping, that is opened during passage of electric current to the inlet-side electromagnetic valve, and that is delayed before being shut off after passage of electric current to the inlet-side electromagnetic valve is stopped.

The invention relates to a condenser of stacked plate design, having a first flow channel for a refrigerant and a second flow channel for a coolant, wherein a plurality of plate elements is provided, which form channels adjacent to each other between the plate elements when the plate elements are stacked on top of each other.

A refrigeration unit and methods of operating a refrigeration unit for an HVACR system are disclosed. The refrigeration unit includes a refrigerant circuit, including a compressor, a condenser, an expansion device, and an evaporator fluidly connected. The condenser includes a condenser portion and a subcooler portion. A single receiver tank is fluidly connected to an output of the condenser portion and an input of the subcooler portion. A restrictor is fluidly connected to the receiver tank. The restrictor can induce a pressure drop in a working fluid flowing from the subcooler portion.

A closure plug for a collector of a refrigerant circuit with a substantially cylindrical base body with a circumferential wall, wherein a first circumferential groove, in which an O-ring is arranged, is provided in the circumferential wall, wherein an elastomer ring is injection molded onto the circumferential wall at an axial distance from the first circumferential groove.

A liquid receiver is composed of a tubular base member having open upper and lower ends, a tubular tank member having a closed upper end and an open lower end and joined to the base member, and a plug fitted into the base member. A female screw is provided on the inner circumferential surface of the base member, and refrigerant inflow and outflow holes are formed in a portion of the base member above the female screw such that the former is located above the latter. A male screw to be screwed into the female screw is provided on the outer circumferential surface of the plug to be located below the refrigerant outflow hole. Sealing is established between a portion of the inner circumferential surface of the base member located below the female screw and a portion of the outer circumferential surface of the plug located below the male screw.

In a refrigeration system comprising a refrigerant circuit, a heat exchanger, an expansion element which, in the active state, cools the entire mass flow of the refrigerant by expansion and thereby produces a main mass flow consisting of liquid refrigerant and an auxiliary mass flow consisting of gaseous refrigerant which enter an intermediate pressure accumulator, at least one normal refrigerating stage which expands a normal refrigerating mass flow in at least one normal refrigerating expansion unit to a low pressure and thereby makes refrigerating capacity available for normal refrigerating purposes, a refrigerant compressor unit which compresses the normal refrigerating mass flow from low pressure to high pressure, and a parallel compressor which, in a parallel compression mode of operation of the refrigerant circuit, sucks in refrigerant from the intermediate pressure accumulator and compresses it to high pressure, it is proposed that, in order to increase the efficiency, the power of the parallel compressor be controlled by a control system, that the control system determine at least one reference variable representing a load state of the refrigerant circuit, that the control system determine a set intermediate pressure value on the basis of the at least one reference variable at least in a parallel compression mode of operation, and that the control system regulate the intermediate pressure in accordance with the set intermediate pressure value at least in the parallel compression mode of operation.

A liquid chiller system utilizing a refrigerant capable of possessing a liquid state and a gas/vapor state, the refrigerant being cycled through a closed loop assembly of a compressor, an eccentric condenser and an eccentric evaporator. The eccentric compressor has a lower integrated reservoir and the eccentric evaporator has an upper dedicated reservoir such that separate, dedicated separator or receiver vessels are not required. The eccentric condenser is positioned above the eccentric evaporator such that liquid refrigerant flows by gravity from the eccentric condenser to the eccentric evaporator.

A manifold includes: a branch pipe including an inflow port and a plurality of outflow ports; and a partition wall that partitions an inside of the branch pipe into a side of the inflow port and a side of the plurality of outflow ports and includes: a plurality of through-holes that have a total opening area greater than an opening area of the inflow port; and a plurality of first facing portions that face the respective outflow ports.

A brazed plate heat exchanger with at least one stack of heat exchanger plates and at least one functional component connected by piping physically and in terms of flow to the stack, for example, a collecting tank, in which case the stack executes a settling movement during brazing. Production is achieved in that the plate heat exchanger with the functional component is produced in a vacuum brazing furnace in a single brazing process, in which at least one structure is contained in the piping that compensates for the settling movement of the plate stack. A corresponding production method is also proposed.