Patent application number | Description | Published |
20130061619 | METHOD OF CONTROLLING HEAT SOURCE-SIDE HEAT EXCHANGER FAN , AND AIR CONDITIONER - A heat source-side heat exchanger fan blowing air to a heat source-side heat exchanger performing heat exchange with refrigerant compressed in a compressor is controlled. A current detected temperature at a current time is converted to obtain a current converted high pressure value at the current time. The current converted high pressure is a pressure of refrigerant inside a high pressure-side pipe of the compressor. The current detected temperature is a temperature detected by a temperature detector attached to the heat source-side heat exchanger. A past detected temperature is converted to obtain a past converted high pressure value at the past time. A speed of the heat source-side heat exchanger fan is determined using a corrected converted high pressure value. The corrected converted high pressure value is obtained by correcting the current converted high pressure value based on the past converted high pressure value. | 03-14-2013 |
20140318165 | REFRIGERATION APPARATUS - An air-conditioning apparatus includes an outdoor unit, an indoor unit having an indoor heat exchanger, and a controller for executing a pump down operation. The outdoor unit has an accumulator of a capacity (Va), a compressor, an outdoor heat exchanger, an expansion valve, a large-diameter tube, which are joined by refrigerant pipes. The capacity (Vhi) of the indoor heat exchanger is greater than the capacity (Vho) of the outdoor heat exchanger. The large-diameter tube, which is larger in diameter than the refrigerant pipes, is provided so that the capacity (Vt) of the large-diameter tube satisfies the formula: capacity (Vt)>capacity (Vhi)−capacity (Vho)−capacity (Va). | 10-30-2014 |
20140360223 | REFRIGERATION APPARATUS - In an air-conditioning apparatus, refrigerant flows sequentially through a compressor, an outdoor heat exchanger, expansion mechanisms, and an indoor heat exchanger during a cooling operation, and refrigerant flows sequentially through the compressor, the indoor heat exchanger, the expansion mechanisms, and the outdoor heat exchanger during a heating operation. Capacity of the outdoor heat exchanger is 30% to 90% of the indoor heat exchanger. The expansion mechanisms include an upstream-side and downstream-side expansion mechanisms depressurizing refrigerant from high to intermediate pressure, and from intermediate to low pressure in the refrigerant cycle, respectively. The refrigerant is R32. A refrigerant storage tank that stores the intermediate pressure refrigerant is provided between the upstream-side and downstream side expansion mechanisms. The refrigerant storage tank stores an excess refrigerant produced during the cooling operation due to capacity of the outdoor heat exchanger relative the indoor heat exchanger. | 12-11-2014 |
20140374062 | OUTDOOR UNIT OF REFRIGERATION APPARATUS - An outdoor unit of a refrigeration apparatus includes a heat exchanger constructed of aluminum or aluminum alloy, a floor frame, and a cap. The heat exchanger has a plurality of flat pipes arranged in rows so as to face a side face, a header manifold connected to each of the flat pipes, and a plurality of fins joined to the flat so that an exchange of heat occurs between a fluid flowing inside the flat pipes and air flowing outside the fiat pipes. The heat exchanger is mounted on the floor frame. The cap covers a lower end part of the header manifold from below the header manifold. The cap has a first drainage structure arranged so that if there is a gap between the header manifold and the cap water that has entered the cap via the gap drains out. | 12-25-2014 |
20140374078 | OUTDOOR UNIT OF REFRIGERATION APPARATUS - An outdoor unit of a refrigeration apparatus includes a heat exchanger constructed of aluminum or aluminum alloy, a floor frame supporting the heat exchanger, and a spacer disposed between the heat exchanger and the floor frame. The heat exchanger has a plurality of flat pipes, a header manifold connected to the flat pipes, and a plurality of fins joined to the flat pipes. Heat exchange occurs between a fluid flowing inside the flat pipes and air flowing outside the flat pipes. The spacer has an inclined surface and a horizontal surface. The inclined surface guides condensation from the heat exchanger to the floor frame. The horizontal surface contacts the heat exchanger and the heat exchanger is horizontally mounted on the horizontal surface. | 12-25-2014 |
20150041101 | OUTDOOR UNIT OF REFRIGERATION APPARATUS - An outdoor unit a refrigeration apparatus includes an aluminum or aluminum alloy heat exchanger, an aluminum or aluminum alloy bracket having a securing portion attached directly to the heat exchanger and a fixing portion with a through hole used to fix the bracket to a non-aluminum metal structural part, a non-metal component interposed between the fixing portion of the bracket and the structural part to create a non-contact state, a non-aluminum metal anchoring part, and an anchored structure cooperating with the anchoring part to fasten a fixing portion of the bracket to the structural part via the non-metal component. The anchoring part has an outer shape smaller than the through hole in the fixing portion. The non-metal component maintains, in astute in which the anchoring part is passing through the through hole in the fixing portion, a non-contact state between the bracket and the anchoring part. | 02-12-2015 |
20150052923 | AIR CONDITIONER - An air conditioner includes an outdoor fan and a refrigerant circuit having a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger connected to each other. An expansion valve refrigerant discharge control, in which the compressor is driven in a state where the outdoor fan is stopped and the expansion valve is open, is performed when a cooling start noise reduction condition that a state of refrigerant at inlet and outlet ports of the expansion valve is in a one-phase liquid state is satisfied when starting the cooling operation. An expansion valve normal switching control, in which an opening of the expansion valve is reduced and an operating frequency of the compressor is increased, is performed after the expansion valve refrigerant discharge control. | 02-26-2015 |
20150059377 | AIR CONDITIONING APPARATUS - An air conditioning apparatus has a refrigerant circuit in which a compressor, a four-way switching valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are interconnected. The outdoor heat exchanger uses multi-hole flat tubes as heat transfer tubes. When stopping a heating operation, the air conditioning apparatus performs pressure equalization control that switches the four-way switching valve from a heating cycle state to a cooling cycle state, thereafter stops the compressor, and equalizes the pressure in the refrigerant circuit. | 03-05-2015 |