Patent application number | Description | Published |
20080209926 | Air Conditioner - An air conditioner has a heat source unit with a compressor and a heat source heat exchanger and utilization units with utilization expansion valves and utilization heat exchangers. The heat source unit and the utilization unit are interconnected via refrigerant communication pipes. The air conditioner is capable of switching and operating between a normal operation mode in which control of the respective devices is performed depending on the operation loads of the utilization units and a refrigerant quantity judging operation mode in which the utilization units perform cooling operation. The utilization expansion valves are controlled such that degrees of superheating at outlets of the utilization heat exchangers become a positive value, and an operation capacity of the compressor is controlled such that evaporation pressures in the utilization heat exchangers become constant. | 09-04-2008 |
20100037642 | COMPRESSOR CAPACITY CONTROL OPERATION MECHANISM AND AIR CONDITIONER PROVIDED WITH SAME - A compressor capacity control operation mechanism includes a pilot valve (flow channel switching valve) having capillary tubes, a suction branching pipe, an intermediate pipe, and a discharge branching pipe. The suction branching pipe is connected to a first capillary tube and branches off from a compressor suction pipe. The intermediate pipe is connected to a second capillary tube and a compressor cylinder intermediate part. The discharge branching pipe is connected to a third capillary tube and branches off from a compressor discharge pipe. Preferably, the suction, intermediate and discharge branching pipes have larger diameters than the first second and third capillary tubes. Also, the pilot valve preferably has a flow channel configuration switchable between first and second states in which the first, second and third capillary tubes are connected differently in the first and second states. | 02-18-2010 |
20100162742 | REFRIGERATION APPARATUS - An air conditioner ( | 07-01-2010 |
20110204042 | ELECTROMAGNETIC INDUCTION HEATING UNIT AND AIR CONDITIONING APPARATUS - An electromagnetic induction heating unit is configured to heat at least one of a refrigerant tube and a member in thermal contact with a refrigerant that flows through the refrigerant tube. The electromagnetic induction heating unit includes a coil and a magnetic member. The coil is disposed in a vicinity of the refrigerant tube. The magnetic member includes a magnetic material. The magnetic member is disposed on at least one of a first side of the coil along a direction in which the refrigerant tube extends, a second side opposite from the first side with respect to the coil, and an outside of the coil that is opposite to an inside of the coil. The inside of the coil is a refrigerant tube side of the coil. | 08-25-2011 |
20110209488 | AIR CONDITIONER - An air conditioner includes a refrigerant circuit, a switching valve, an outdoor fan and a controller. The refrigerant circuit sequentially circulates refrigerant through a compressor, an indoor heat exchanger, a decompression mechanism and an outdoor heat exchanger during a heating operation. The switching valve is connected to the refrigerant circuit to switch a flow direction of the refrigerant discharged from the compressor. The controller executes a defrosting operation control in which the outdoor fan is deactivated and the switching valve directs refrigerant discharged from the compressor towards the outdoor heat exchanger during a defrosting operation. The controller further maintains the switching valve so refrigerant discharged from the compressor is directed towards the outdoor heat exchanger and executes a fan defrosting operation control in which the outdoor fan is rotated for a predetermined period of time after completion of the defrosting operation when a predetermined condition is satisfied. | 09-01-2011 |
20120023989 | AIR CONDITIONING APPARATUS - An air conditioning apparatus includes a compressor, an indoor and outdoor heat exchangers, an indoor fan, an outdoor expansion element, a refrigerant-pressure-perceiving part, which perceives a pressure of refrigerant sent from the compressor to the indoor heat exchanger, and a control part, which performs startup fan control in which the indoor fan remains stopped until the compression element goes from being at rest to starting up and the pressure perceived reaches a high-pressure threshold, the indoor fan is driven when the pressure perceived reaches or exceeds the high-pressure threshold. An action of reducing or stopping air volume of the indoor fan when the pressure perceived decreases to or falls below a low-pressure lower than the high-pressure threshold, and an action of increasing air volume or initiating driving of the indoor fan when the pressure perceived reaches or exceeds a pressure threshold which is higher than the low-pressure threshold. | 02-02-2012 |
20120060530 | AIR CONDITIONER - It is an object of the present invention to provide an air conditioner for inhibiting noise increase and heating performance degradation due to frost attachment onto an outdoor heat exchanger. In an air conditioner ( | 03-15-2012 |
20120060532 | HEATING DEDICATED AIR CONDITIONER - A heating dedicated air conditioner includes a compression mechanism, an indoor heat exchanger, an outdoor heat exchanger, an expansion mechanism provided between one end of the indoor heat exchanger and one end of the outdoor heat exchanger, a four-way switching valve switchable between first and second states of connection between the compressor and the heat exchangers, a fan ventilating the indoor heat exchanger, and a control unit controlling at least the compressor, the expansion mechanism, the four-way switching valve, and the fan. The control unit switches the four-way switching valve to the second state in a test operation mode, which includes a drain water inhibited interval during which drain water inhibition control is performed. The control unit operates the compressor and stops the fan when the drain water inhibition control is performed. | 03-15-2012 |