Patent application number | Description | Published |
20090133435 | Refrigerating Air-Conditioning Apparatus - A refrigerating air-conditioning apparatus, at least provided with no possibility that a foreign material returns to a compressor from an accumulator at a time of the pipeline-cleaning operation firstly, and provided with a possibility to perform a collecting operation for the foreign material in a short time secondary, is provided. | 05-28-2009 |
20090145151 | AIR CONDITIONER - An air conditioner including an outdoor unit, indoor units, and a relay device for connection between the outdoor unit and each of the indoor units. The outdoor unit includes an outdoor heat exchanger, a compressor for pressurizing a refrigerant of or including carbon dioxide, and a first switching member for switching flow direction of the refrigerant through the outdoor heat exchanger. Each of the indoor units includes an indoor heat exchanger and first flow controller in fluid communication between first and second pipe connection ports. The relay device includes second switching members, each of the second switching members selectively connecting the first pipe connection port of a respective indoor unit with the first or second connection end of the outdoor unit. | 06-11-2009 |
20090158761 | REFRIGERATOR AND AIR CONDITIONER - A refrigerator has a coolant cooler for cooling a coolant at the entrance of a flow control valve, when the cooling amount in the coolant cooler is deficient as well as excessive. The refrigerator includes a compressor for compressing the coolant, a radiator for radiating heat from the coolant, a coolant cooler for cooling the coolant, a flow control valve for regulating the flow volume of the coolant, an evaporator for evaporating the coolant, and a heat-exchange-amount control for controlling the amount of heat exchanged in the coolant cooler. The coolant is circulated through the compressor, the radiator, the coolant cooler, the flow control valve, and the evaporator, in that sequence. | 06-25-2009 |
20090301698 | HEAT EXCHANGER OF PLATE FIN AND TUBE TYPE - A heat exchanger including plate fins stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in. The heat exchanger exchanges heat between first and second fluids flowing, respectively, inside and outside the heat exchanger tubes. Each of the fins includes a substantially planar main body and cut-raised portions extending from the main body and disposed at an upstream side of flow of the second fluid. Each of the cut-raised portions corresponds to a respective heat exchanger tube and includes first and second opposed side ends connected to the main body of the fin. The first side end is nearer to the corresponding heat exchanger tube than is the second side end, the first side end is longer than the second side end, and the first side end is disposed at a downstream side of the flow of the second fluid, facing the corresponding heat exchanger tube. | 12-10-2009 |
20100152903 | REFRIGERATING CYCLE APPARATUS AND OPERATION CONTROL METHOD THEREFOR - In a refrigerating cycle apparatus and control method thereof, a controller sets a high-pressure pressure target value from thermal load and temperature conditions based on refrigerant information that has been obtained from detectors, and controls at least one of a rotational frequency of a compressor, a degree of opening of an electronic expansion valve, a rotational frequency of an outdoor fan, or a rotational frequency of an indoor fan to match a high-pressure pressure to the high-pressure pressure target value that has been set. Here, a threshold value is set when the high-pressure pressure target value is set, and a method for setting the high-pressure pressure target value is modified depending on whether the high-pressure pressure is greater than or equal to the threshold value or less than the threshold value when the high-pressure pressure target value is decided. | 06-17-2010 |
20100162749 | HEAT EXCHANGER AND REFRIGERATING AIR CONDITIONER - A heat exchanger includes a first flat tube in which a low temperature fluid flows and a second flat tube in which a high temperature fluid flows and that is laminated on the first flat tube and arranged so that the flow direction of the high temperature fluid is parallel to the flow direction of the low temperature fluid. One of the first and second flat tubes is arranged in the direction of lamination. Ends of the flat tubes are bent in a direction intersecting at right angles both flow directions of the fluids and the direction of lamination. | 07-01-2010 |
20110083456 | REFRIGERATION CYCLE DEVICE AND METHOD OF CONTROLLING THE SAME - A refrigeration cycle device | 04-14-2011 |
20110088421 | AIR CONDITIONING APPARATUS - A heat source-side refrigerant circuit A including a compressor | 04-21-2011 |
20110113802 | AIR CONDITIONER - A multi-chamber air conditioner including a heat-source side refrigerant circuit in which a compressor, an outdoor heat exchanger, a first heat exchanger, a refrigerant flow-rate controller, and a second heat exchanger are connected in series, a first use-side refrigerant circuit in which the first heat exchanger and an indoor heat exchanger are connected in series, and a second use-side refrigerant circuit in which the second heat exchanger and the indoor heat exchanger are connected in series, and a heat-source side refrigerant circulating in the heat-source side refrigerant circuit and a use-side refrigerant circulating in the use-side refrigerant circuit are heat-exchanged in the first heat exchanger. The heat-source side refrigerant circulating in the heat-source side refrigerant circuit and the use-side refrigerant circulating in the use-side refrigerant circuit are heat-exchanged in the second heat exchanger. | 05-19-2011 |
20110120579 | FOUR-WAY VALVE - In a four-way valve having a simple structure, even if a high-temperature refrigerant and a low-temperature refrigerant flow close to each other, heat loss between both refrigerants is suppressed. The valve comprises a housing member including a valve chamber, a valve seat including a bearing surface portion located in the valve chamber, a first channel through which a high-temperature fluid flows and a second channel through which a low-temperature fluid flows at a predetermined time, including openings adjacent to each other at a bearing surface portion of the valve seat, passing through the valve seat and extending outside of the valve chamber, and a valve element moving to the bearing surface portion of the valve seat. A thermal resistor portion suppressing heat transfer between these channels is located near the openings, between the first and second channels. | 05-26-2011 |
20110167865 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus in which a labor required for system selection is simplified is provided. | 07-14-2011 |
20110192184 | AIR-CONDITIONING APPARATUS AND RELAY UNIT - To obtain an air-conditioner apparatus that can achieve energy-saving without making refrigerant circulate up to an indoor unit and whose construction work is easy. A refrigeration cycle is configured by connecting a compressor, a four-way valve, a heat source side heat exchanger, expansion valves, and intermediate heat exchangers by piping. A heat medium circulation circuit is configured by connecting intermediate heat exchangers, pumps, and use side heat exchangers by piping. The outdoor unit that is installed in a space such as outdoors of the building and accommodates the compressor, the four-way valve, and the heat source side heat exchanger, and the relay unit that is installed in a non-subject space which is different from an indoor space and is on a installation floor separated by two or more floors and accommodates the expansion valves, the pump, and intermediate heat exchangers are connected by two pipelines. The relay unit and an indoor unit that accommodates use side heat exchangers and is installed at a position where an indoor space can be air-conditioned are connected by two pipelines from outside of the wall which is a partition between inside and outside of the room. | 08-11-2011 |
20110192189 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus in which entry of a refrigerant into a living space is suppressed and measures against refrigerant leakage are taken is provided. | 08-11-2011 |
20110197608 | AIR-CONDITIONING APPARATUS - A refrigeration cycle is configured by connecting a compressor that compresses the refrigerant, a four-way valve that switches the circulation path of the refrigerant, a heat source side heat exchanger that exchanges heat, expansion valves that adjust the pressure of the refrigerant, and two or more intermediate heat exchangers that exchange heat between the refrigerant and the heat medium to heat and cool the heat medium, by piping. A heat medium circulation circuit is configured by connecting two or more intermediate heat exchangers, pumps that pressurize the heat medium, two or more use side heat exchangers that exchange heat between the heat medium and the air in the indoor space, and flow path switching valves that switch paths of the heated heat medium or the cooled heat medium to the use side heat exchangers, by piping. | 08-18-2011 |
20110225998 | AIR-CONDITIONING APPARATUS - To obtain an air-conditioning apparatus that does not make a refrigerant circulate up to an indoor unit and further can achieve energy-saving. A refrigeration cycle is configured by connecting a compressor that pressurizes a refrigerant, a four-way valve that switches a circulation path of the refrigerant, a heat source side heat exchanger that performs heat exchange, expansion valves for pressure-adjusting the refrigerant, and a plurality of intermediate heat exchangers that performs heat exchange between the refrigerant and the heat medium to heat and cool the heat medium, with piping. A heat medium circuit is configured by connecting intermediate heat exchangers, pumps that pressurize the heat medium, and a plurality of use side heat exchangers that perform heat exchange between the heat medium and the air in the indoor space, with piping. | 09-22-2011 |
20110308272 | REFRIGERATING AIR-CONDITIONING APPARATUS - A refrigerating air-conditioning apparatus, at least provided with no possibility that a foreign material returns to a compressor from an accumulator at a time of the pipeline-cleaning operation firstly, and provided with a possibility to perform a collecting operation for the foreign material in a short time secondary, is provided. | 12-22-2011 |
20110308273 | REFRIGERATING AIR-CONDITIONING APPARATUS - A refrigerating air-conditioning apparatus, at least provided with no possibility that a foreign material returns to a compressor from an accumulator at a time of the pipeline-cleaning operation firstly, and provided with a possibility to perform a collecting operation for the foreign material in a short time secondary, is provided. | 12-22-2011 |
20120006436 | VALVE BLOCK, VALVE BLOCK UNIT, AND METHOD OF INSPECTING VALVE BLOCK UNIT - Provided are a valve block and a valve block unit which allow simplification and miniaturization of a pipe arrangement. | 01-12-2012 |
20120031130 | RELAY UNIT AND AIR CONDITIONING APPARATUS - A relay unit connected to one or a plurality of outdoor units and a plurality of indoor units by different pipeline systems, respectively, so as to exchange heat between a refrigerant circulating through the outdoor unit and a heat medium different from the refrigerant and to circulate the heat medium through the indoor unit, provided with a valve block unit in which a plurality of valve blocks integrated with at least a plurality of branch pipes connected to the indoor unit, a plurality of main pipes which become channels for the heat medium relating to the heat exchange, and heat medium flow direction switching devices that switch the main pipes to communicate with the branch pipes are connected. | 02-09-2012 |
20120036887 | AIR-CONDITIONING APPARATUS - A multi-chamber type air-conditioning apparatus is provided in which a refrigerant whose effect on human bodies is a concern is prevented from leaking into a room or the like in which an indoor unit is installed, simultaneous operation of cooling and heating is possible, and performance deterioration by a refrigerant flow control device or drop of the cooling capacity of the indoor unit can be prevented. | 02-16-2012 |
20120042674 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus capable of achieving enhancement of the system COP while suppressing product cost. The air-conditioning apparatus controls the difference between the temperatures of brine at a position before and at a position after an indoor heat exchanger or at a position before and at a position after an intermediate heat exchanger to be a preset target value and to be larger at the time of a heating operation than at the time of a cooling operation. | 02-23-2012 |
20120043054 | AIR-CONDITIONING APPARATUS - In a first cycle, a first heat exchanger, in which a first medium exchanges heat with the outside air, a second heat exchanger and a third heat exchanger, in which heat is exchanged between the first cycle and a second cycle and between the first cycle and a third cycle, respectively, are connected in series with a first reducing valve and a second reducing valve. In the second cycle and the third cycle that convey cooling energy and heating energy, the flow rates of a second medium in respective branches are adjusted by flow-rate-adjusting valves in accordance with the entrance and exit temperatures of indoor units, and the total flow rate is determined by controlling the rotation speed of a pump by a minimum resistance method. Therefore, even if there are a plurality of loads and the loads change significantly, a stable controlling operation is realized, enabling a highly efficient operation. | 02-23-2012 |
20120043056 | AIR CONDITIONING APPARATUS - A first cycle, in which a first medium is circulated, employs a compressor, a first heat exchanger structured with an air heat exchanger, a second heat exchanger, and a third heat exchanger. A second cycle, in which a second medium is circulated and heat is exchanged with the first medium through the second heat exchanger, employs indoor units, each having a fan. A third cycle, in which the second medium is circulated and heat is exchanged with the first medium through the third heat exchanger, shares the indoor units with the second cycle. Flow path switching valves switch flow paths between the second cycle and third cycle. Before the first heat exchanger is defrosted, a halted indoor unit is filled with the second medium in the third cycle with its fan being halted. The third heat exchanger functions as an evaporator during a defrosting operation. | 02-23-2012 |
20120118530 | AIR-CONDITIONING APPARATUS - To provide an air-conditioning apparatus which achieves improvement of safety and further achieves saving of energy without circulating a refrigerant in or near an indoor unit. The air-conditioning apparatus includes one expansion device disposed on an outlet side of a heat exchanger related to the heat medium on the heating side. Another expansion device is disposed on an inlet side of a heat exchanger related to the heat medium on the cooling side such that the expansion devices are directly connected through a connecting pipe. | 05-17-2012 |
20120151949 | AIR CONDITIONING DEVICE - To provide an air-conditioning apparatus capable of achieving energy saving. An air-conditioning apparatus controls first heat medium flow switching devices and second heat medium flow switching devices in a heating only operation mode and a cooling only operation mode such that a flow rate through which a heat medium circulates is formed between all of the heat exchangers related to heat medium and at least one of use side heat exchangers. | 06-21-2012 |
20120198879 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus including an outdoor unit having a compressor compressing a refrigerant and a heat source side heat exchanger exchanging heat between the refrigerant and air; a plurality of indoor units having use side heat exchangers exchanging heat between a heat medium that flows therein and air; and a relay unit disposed between the outdoor unit and the indoor units, the relay unit exchanging heat between the refrigerant conveyed from the outdoor unit and the heat medium flowing in the indoor units, in which the relay unit includes a main relay unit that is connected to the outdoor unit with two pipings and a sub relay unit that is connected to the main relay unit with three pipings. | 08-09-2012 |
20120272672 | AIR-CONDITIONING APPARATUS - Providing an air-conditioning apparatus that is capable of securing safety while reducing load to the environment. | 11-01-2012 |
20130139539 | AIR-CONDITIONING APPARATUS - In an air-conditioning apparatus, an expansion device, a second refrigerant flow switching device, and heat exchangers related to heat medium, connected between the expansion device and the second refrigerant flow switching device such that a heat source side refrigerant flows in parallel, are connected in a part of refrigerant passages, and an expansion device, a second refrigerant flow switching device, and heat exchangers related to heat medium, connected between the expansion device and the second refrigerant flow switching device such that the heat source side refrigerant flows in series, are connected in the rest of the refrigerant passages. | 06-06-2013 |
20130174594 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus includes a heat medium circuit with a heat medium flow reversing device that can switch the flow direction of a heat medium in the heat medium side passage of the heat exchanger related to heat medium. | 07-11-2013 |
20130186126 | AIR-CONDITIONING APPARATUS - [Object] To reduce pressure loss of refrigerant while suppressing a cost increase. | 07-25-2013 |
20130233008 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus includes a refrigerant circuit including a low-pressure shell structure compressor into which a refrigerant flowing through an injection pipe flows, a first heat exchanger, a second heat exchanger, a first expansion device, a refrigerant flow switching device, and a second expansion device configured to allow the refrigerant which has passed through the first expansion device and flows from the second heat exchanger to the first heat exchanger to have an intermediate pressure, the compressor, the first heat exchanger, the second heat exchanger, the first expansion device, the refrigerant flow switching device, and the second expansion device being connected by pipes to constitute the refrigerant circuit, and further includes a controller that controls an amount of refrigerant flowing through the injection pipe into a compression chamber. A part of a high-pressure refrigerant flowing from the first heat exchanger to the second heat exchanger flows through the injection pipe. | 09-12-2013 |
20130239602 | AIR-CONDITIONING APPARATUS - A heat pump hot-water supply apparatus controls a second expansion device during a heating operation so as to adjust the amount of refrigerant flowing through an injection pipe, and controls a third expansion device during a cooling operation so as to adjust the amount of refrigerant flowing through the injection pipe. | 09-19-2013 |
20130333862 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus controls that a discharge temperature does not become too high with a refrigerant whose compressor discharge temperature readily rises, and thus suppress degradation of the refrigerant and a refrigerating machine oil. An injection pipe that injects a heat source side refrigerant into a compressor is installed, connected a pipe between a backflow prevention device and an opening and closing device installed on a branching pipe, and an aperture unit in the compressor. | 12-19-2013 |
20140026605 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus controls an opening degree of at least one of a second expansion device and a third expansion device to adjust the amount of refrigerant to flow through the injection pipe. | 01-30-2014 |
20140083123 | AIR-CONDITIONING APPARATUS - In an air-conditioning apparatus, a controller controls an amount of refrigerant injection into a compressor by controlling an opening area of an expansion device such that the electric power consumption of the compressor becomes smaller, or such that a heating capacity or a cooling capacity of an intermediate heat exchanger becomes larger. | 03-27-2014 |
20140165635 | AIR-CONDITIONING APPARATUS - A channel on an upstream side of a third expansion device and a channel on an upstream side of a second expansion device are connected during a heating operation, and medium pressure refrigerant generated by the third expansion device during the heating operation is introduced on a suction side of a compressor via the second expansion device and a suction injection pipe. | 06-19-2014 |
20140246180 | OUTDOOR COOLING UNIT IN VEHICLE AIR-CONDITIONING APPARATUS - An outdoor cooling unit in a vehicle air-conditioning apparatus is configured such that the angle between a normal line to a suction plane of a suction portion and a normal line to a discharge plane of a discharge portion is acute and such that air inside a housing flows in a substantially checkmark-shape, substantially V shape or substantially U shape. In the outdoor cooling unit, a blade of an axial fan is configured such that a chord center line formed by connecting chord central points from an inner circumferential end to an outer circumferential end of the blade and projecting the connected chord central points on a plane containing a rotating shaft is convexly curved toward the downstream side over the entire area in the radial direction. | 09-04-2014 |
20140331702 | AIR-CONDITIONING APPARATUS - An air-conditioning apparatus including a refrigeration cycle configured by connecting one or more load-side units including a load-side heat exchanger and a load-side expansion device with a heat-source-side unit including a heat-source-side heat exchanger and a compressor and by causing refrigerant to circulate through a refrigerant circuit including the load-side heat exchanger, the load-side expansion device, the heat-source-side heat exchanger, and the compressor, controls, during a heating operation, the opening degree of the load-side expansion device, based on the discharge pressure of the compressor, so that the pressure of refrigerant at the outlet of the compressor becomes equal to a target pressure, in the case where the operation capacity of the compressor is approximately at the maximum value of the operation capacity of the compressor. | 11-13-2014 |