A smart sound appliance which has a noise producing device such as a compressor that is controlled by a controller. The controller receives information from a user indicative of whether the user is in a location to receive those sounds. When the user is in the location to receive those sounds, the controller can take an action to reduce those sounds by either turning off the compressor, or reducing the sound of the appliance in some other way.

This refrigerant vessel component (2, 4, 7) for a refrigeration circuit (100), comprises a shell (10) extending along a longitudinal axis (X) delimiting an internal volume (V), in which circulates a refrigerant fluid (R), whereas the refrigerant vessel component (2) comprises an inner shell (20) located radially inside the shell (10) and extending on at least a portion of the circumference of the shell (10), and whereas the inner shell (20) is at least partly formed of perforated material.

An evaporator for a refrigeration appliance has a refrigerant line, which extends from an injection point to an outlet of the evaporator. A number of heat exchanger plates are in thermal contact with the refrigerant line and with the surroundings of the evaporator. The refrigerant line has, in an upstream region of the evaporator, at least one constriction, which is spaced apart from the injection point.

An acoustically insulated machine including a source of noise positioned within a housing, a first insulation member positioned within the housing and including a first porous sound absorbing layer and a first dense layer, and a second insulation member positioned within the housing and including a second porous sound absorbing layer and a second dense layer. The first insulation member being is positioned closer to the internal source of noise than the second insulation member and the first insulation member being spaced apart from the second insulation member such that an air gap is formed between the first insulation member and the second insulation member.

Air conditioner units and methods of operating the same are provided. A method of operating an air conditioner unit includes determining a fan speed as a function of a compressor speed of a variable speed compressor of the air conditioner unit. The method also includes activating a variable speed fan of the air conditioner unit at the fan speed. An air conditioner unit may include a controller, and the controller may be configured for performing the method.

A method of operating a chiller system includes receiving an input from at least one sensor associated with a compressor of the chiller system, determining that the compressor is experiencing a surge or rotating stall event, adjusting at least one operating parameter associated with a heat rejection heat exchanger of the chiller system in response to determining that the compressor is experiencing the surge or rotating stall event, and reducing a condenser saturation temperature by adjusting the at least one operating parameter.

Provided is a refrigeration machine provided with: a refrigeration cycle having a compressor, a condenser, an expander, an evaporator, and piping (12) which sequentially connects the compressor, the condenser, and the expander; and an acoustic device (13) having a space formation section (14) which has one end (14a) connected to the piping (12) and in which a space is formed, the acoustic device (13) also having a vibration body (20) which is affixed integrally to the other end of the space formation section (14) and which has a lower natural frequency than the space formation section (14).

An oil separator and an air conditioning system provided with the oil separator are disclosed by the present disclosure. The oil separator comprises: an inlet (20) configured to receive a refrigerant; a duct (10) through which the refrigerant flows, the duct having a circumferential wall and comprising: a first section comprising a first muffler adjacent to the inlet, the first muffler (60) comprising a chamber (11) defined by a first wall (13) of the first section and designed to have a length dimension (L) in a length direction of the duct and a depth dimension (H) intersecting the length dimension; and a second section downstream of the first section, a second wall (23) of the second section being provided with a second muffler (70); and an oil separation assembly (80,90) through which the refrigerant passing through the duct passes. The present disclosure has a simple and reliable structure and is easy to implement.

An air conditioner switches between a normal refrigeration cycle and a defrosting refrigeration cycle, and includes: a refrigerant circuit that connects a first heat exchanger, a second heat exchanger, a radiation panel, and an expansion valve that regulates a flow rate of a refrigerant flowing through the radiation panel; and a controller that causes the air conditioner to switch between the normal refrigeration cycle and the defrosting cycle. During the normal refrigeration cycle, the radiation panel performs cooling or heating. During the defrosting cycle, the first heat exchanger serves as a radiator and the second heat exchanger serves as an evaporator. During the defrosting cycle, the controller causes the expansion valve to be in a fully closed state.

A deflector for a condenser, the condenser has an inlet communicated with exhaust pipes of a compressor, and the deflector is provided at the inlet, the deflector includes: a flow guiding structure having a first tube section and a second tube section of increasing diameter, the second tube section being positioned below the first tube section and extending into the condenser when mounted in place; and a support assembly for fixing the flow guiding structure at the inlet, at least a part of the refrigerant gas flow flows through the interior of the first tube section, and at least another part of the refrigerant gas flow flows through the outer side of the first tube section.