An air conditioning apparatus may include an outdoor unit through which a first fluid, such as refrigerant circulates, an indoor unit through which a second fluid, such as water circulates, a heat exchange device which is configured to connect the outdoor unit to the indoor unit and in which the first fluid and the second fluid are heat-exchanged with each other, first to third inner tubes configured to connect the outdoor unit to the heat exchange device, and a heat storage unit connected to the first to third inner tubes.

A heat exchanger includes: first layers each including first flow channels that are microchannels; and second layers each including second flow channels that are microchannels. The first layers and the second layers constitute a lamination. Heat is exchanged by performing either of: liquid evaporation in the first flow channels and gas condensation in the second flow channels, or liquid evaporation in the second flow channels and gas condensation in the first flow channels. The lamination includes: a first liquid transport pore that is in fluid communication with the first flow channels; and a second liquid transport pore that is in fluid communication with the second flow channels.

Provided is an air conditioning apparatus. The air conditioning apparatus includes an outdoor unit through which a refrigerant is circulated, an indoor unit through which water is circulated, and a heat exchange device including a heat exchanger in which the refrigerant and the water are heat-exchanged with each other. The heat exchanger includes a high-pressure guide tube, a low-pressure guide tube, a liquid guide tube, a bypass tube configured to connect a bypass branch point of the high-pressure gas tube of the outdoor unit to a bypass combination point of the liquid guide tube to bypass a high-pressure refrigerant existing in the high-pressure tube to the liquid guide tube, and a bypass valve installed in the bypass tube. The outdoor unit includes a first valve device configured to guide a refrigerant compressed in the compressor to the outdoor heat exchanger and a second valve device configured to guide the refrigerant compressed in the compressor to the high-pressure guide tube of the heat exchange device.

A climate-control system may include a first working fluid circuit, a second working fluid circuit and a storage tank. The first working fluid circuit includes a first compressor and a first heat exchanger in fluid communication with the first compressor. The second working fluid circuit includes a second compressor and a second heat exchanger in fluid communication with the second compressor. The storage tank contains a phase-change material. The first working fluid circuit and the second working fluid circuit are thermally coupled with the phase-change material contained in the storage tank.

A gas compressor includes inverters, a plurality of compressor units and a control device for controlling each of the inverters. The control device increases the number of compressor bodies to be operated after confirming that the rotational speed of the operational motors will reach a steady value immediately after causing the number of the compressor bodies to be operated to increase.

The present invention provides an improved method for flushing a solvent through a line set of a condenser, compressor, and routing of heat ventilation and air-conditioning, and a high-pressure to low-pressure coupling device. The novel device is operable for joining the high-pressure and low-pressure lines and eliminates the need for having multiple technicians present for conducting a line set flush.

Provided are a method and apparatus for controlling the operation of a compressor of an HVAC system in response to the refrigerant super heat value for refrigerant within the compressor. First and second signals are received for indicating one or more temperature values of refrigerant substantially at the first compressor sump and within the first distributor tube, respectively. A saturated suction temperature is estimated using at least the second signal. A first super heat value is calculated for refrigerant substantially at the first compressor sump using at least the saturated suction temperature and the one or more temperature values indicated by the first signal. A first control signal is generated for at least de-energizing the first compressor if the calculated first super heat value is below a tolerance value defining the minimum super heat value at which the first compressor may be operated.

Devices, systems, and methods are disclosed for cooling using both air and/or liquid cooling sub circuits. A vapor compression cooling system having both an air and liquid cooling sub circuit designed to service high sensible process heat loads that cannot be solely cooled by either liquid or air is provided.

Disclosed are an oil separation device (1283) and a condenser (130-1130) with an oil separation function, and a refrigeration system (100, 1200) using same. The oil separation device (1283) or the condenser (130-1130) comprises: a shell (201, 1301) comprising an oil separation cavity (315, 1315), a first refrigerant inlet (221, 1221), a second refrigerant inlet (222, 1222), a first flow guide channel (445-2145), and a second flow guide channel (446-2146), wherein refrigerant gas flowing through the two flow guide channels can be mixed. When the refrigeration system (100, 1200) comprises two compressors (108, 1208, 109, 1209) with different displacements, the requirement of filtering and separating a gaseous refrigerant and lubricating oil can be met without the need for designing the size of the oil separation cavity (315, 1315) in accordance with large-displacement compressors (109, 1209), and the size is small.

A refrigeration system, according to the present invention, has a standard refrigeration circuit, with a condenser connected to a low temperature evaporator and a medium temperature evaporator by a high-pressure liquid line, which are in turn connected to a compressor by a low-pressure vapour return line and a medium-pressure vapour return line, and the compressor is connected to the condenser by a high-pressure vapour line. A low-pressure booster is connected on the low-pressure vapour return line operating at a low compression ratio to boost the pressure of the low-pressure vapour return line to substantially the same pressure as the medium-pressure vapour return line.