A flow rate control device according to one embodiment includes: a flowmeter that repeatedly generates a pulse signal based on flow of a fluid discharged from a fluid machine driven by a brushless motor or AC motor, such that a pulse width of the pulse signal is inversely proportional to a flow rate of the fluid; an FV converter that makes frequency-voltage conversion of the pulse signal and generates a voltage value corresponding to the pulse signal; and a controller that changes a frequency of a drive input voltage for driving the brushless motor or AC motor based on a difference between a converted flow rate of the fluid converted based on the voltage value generated by the FV converter and a preset target flow rate.

An air conditioner is disclosed. The air conditioner comprises: a compressor for compressing a refrigerant; a discharge pipe for guiding the refrigerant discharged from the compressor; an accumulator for storing the refrigerant flowing into the compressor from an outdoor heat exchanger or an indoor heat exchanger; a suction pipe for guiding the refrigerant discharged from the accumulator to the compressor; a subcooler disposed in a pipe between the outdoor heat exchanger and the indoor heat exchanger so as to secure a degree of subcooling of the refrigerant; an injection pipe for guiding a refrigerant superheated in the subcooler to the compressor; and a fixing member provided for fixing the discharge pipe, the suction pipe, and the injection pipe together.

An air conditioner is disclosed. The air conditioner comprises: a compressor for compressing a refrigerant; a discharge pipe for guiding the refrigerant discharged from the compressor; an accumulator for storing the refrigerant flowing into the compressor from an outdoor heat exchanger or an indoor heat exchanger; a suction pipe for guiding the refrigerant discharged from the accumulator to the compressor; a subcooler disposed in a pipe between the outdoor heat exchanger and the indoor heat exchanger so as to secure a degree of subcooling of the refrigerant; an injection pipe for guiding a refrigerant superheated in the subcooler to the compressor; and a fixing member provided for fixing the discharge pipe, the suction pipe, and the injection pipe together.

A refrigerant pipe unit includes: a first plate; a second plate stacked on the first plate; and a control valve. One or both of the first plate and the second plate include a refrigerant flow path. The control valve includes: a valve body that includes a refrigerant passage communicating with the refrigerant flow path, rotates in the first plate, and changes a flow of a refrigerant in the refrigerant flow path with an amount of rotation of the valve body; and a driver that adjusts the amount of the rotation of the valve body.

Methods and apparatuses for expelling heat may be provided. For example, an apparatus may comprise a rotating assembly, a support structure, a condenser water tank, and a control system. The apparatus may rotate the rotating assembly such that tanks of the assembly are rotated into and out of the condenser water tank. The rotation may be self-starting and controlled by a control system.

A sensor assembly and a refrigerant sensing system for air conditioning systems can include a sensor controller, a sensor electrically connected to the sensor controller and configured to output sensor data to the sensor controller, and a housing having an interior space enclosing the sensor controller and the sensor. The housing includes a first end and a second end and a barrier disposed between the first end and the second end sealingly separating the interior space. The first end supports the sensor and includes a plurality of openings exposing the sensor to an external environment. The second end supports the sensor controller and substantially prevents the sensor controller from being exposed to the external environment.

A sensor assembly and a refrigerant sensing system for air conditioning systems can include a sensor controller, a sensor electrically connected to the sensor controller and configured to output sensor data to the sensor controller, and a housing having an interior space enclosing the sensor controller and the sensor. The housing includes a first end and a second end and a barrier disposed between the first end and the second end sealingly separating the interior space. The first end supports the sensor and includes a plurality of openings exposing the sensor to an external environment. The second end supports the sensor controller and substantially prevents the sensor controller from being exposed to the external environment.

A reheating process for operating a cooling system having a heat pump function for a motor vehicle. The reheating process includes steps of determining a heat differential value by comparing a heat emission actual value at the heating register to a heat emission target value, and adjusting at least one operating setting of the cooling system, so that the power consumption in the cooling system is increased if the heat differential value is greater than 0 and less than a heat differential threshold value.

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).

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).