Abstract: A multi-room air-conditioning apparatus includes an outdoor unit, a relay unit connected to an outdoor unit by first and second connection pipes, and a plurality of indoor units connected to the relay unit. The outdoor unit includes a second gas-liquid separating device provided on the suction side of the compressor. The suction side of the compressor and the second gas-liquid separating device are connected to each other by a gas-side outlet pipe and a liquid-side outlet pipe.

Abstract: Obtained is an air-conditioning apparatus that is capable of saving energy. A pressure in a passage of the second refrigerant flow switching device in which a refrigerant from an outdoor unit flows into is higher than a pressure in a passage of the second refrigerant flow switching device in which the refrigerant flows out to the outdoor unit regardless of switching states of a first refrigerant flow switching device, the second refrigerant flow switching devices, and a third refrigerant flow switching device.

Abstract: A vehicular thermo-control device adjusts a temperature of a battery. The device has a primary system through which cooling water circulates, and a secondary system through which a refrigerant circulates. The primary system has a heat exchanger which performs heat exchange between the battery and the cooling water, and a heat exchanger which performs heat exchange between the cooling water and an ambient air. The secondary system is a refrigerating cycle. Both heat exchangers on a high temperature side and a low temperature side of the refrigerating cycle are thermally coupled with the primary system. Only one heat exchanger provides heat exchange with the ambient air. The pump of the primary system can switch circulating direction of the cooling water. A controller controls devices to perform cooling and heating operation.

Abstract: A refrigeration apparatus uses R32 as refrigerant, and includes a compressor, condenser, expansion mechanism, evaporator, accumulator, branching flow path, opening degree adjustment valve disposed in the branching flow path, injection-use heat exchanger and a first injection flow path. The accumulator has an inside space to separate and accumulate refrigerant. The injection-use heat exchanger causes heat exchange between refrigerant flowing through the main refrigerant flow path and that has passed through the opening degree adjustment valve of the branching flow path. The first injection flow path guides the refrigerant that has flowed through the branching flow path and exited the injection-use heat exchanger to the inside space of the accumulator. A distal end of the first injection flow path is located in a height position separated by a dimension from a bottom of the inside space. The dimension is 0 to 0.3 times a height dimension of the inside space.

Abstract: When a refrigerant flow-path switch performs switching to a first refrigerant flow path, an interior condenser heating air blown into an interior as a first temperature-adjustment subject and an auxiliary heat exchanger are connected in parallel, and the auxiliary heat exchanger heats air blown to a battery as a second temperature-adjustment subject. In contrast, when the refrigerant flow-path switch performs switching to a second refrigerant flow path, an interior evaporator cooling air blown into the interior and the auxiliary heat exchanger are connected in parallel, and the auxiliary heat exchanger cools the air blown to the battery. With this arrangement, one common auxiliary heat exchanger can cool or heat the air for the battery, thereby leading to reduction in size of an entire refrigeration cycle device.

Abstract: In the case of a heating operation in which a use side heat exchanger functions as a condenser when the outside air has a predetermined low temperature, a low-outside-air-temperature heating operation start mode is executed in which, while a refrigerant, as discharged from a compressor, flows into the use side heat exchanger, the refrigerant is supplied to the injection port of the compressor via an injection pipe and a part of a refrigerant that is accumulated in an accumulator is supplied to the compressor via a connecting pipe, and thereafter a low-outside-air-temperature heating operation mode is executed in which the refrigerant, as discharged from the compressor, is supplied to the injection port of the compressor via the injection pipe while flowing into the use side heat exchanger.

Abstract: A heat pump system includes a refrigerant circuit. First and second heat exchangers are arranged in the refrigerant circuit. A flow reversing device selectively changes a direction of flow in the refrigerant circuit between the first and second heat exchangers. A centrifugal compressor is arranged in the fluid circuit and has first and second impellers arranged in series relative to one another to provide a desired compressor pressure ratio. In one example, the centrifugal compressor mounts the first and second impellers on opposing ends of a shaft. The first and second impellers respectively include first and second stage inlets and outlets. One example desired compressor pressure ratio of at least 10:1 corresponds to a second stage outlet pressure to a first stage inlet pressure. A first diffuser is arranged at the first stage outlet, and the first diffuser is a variable geometry diffuser.

Abstract: The present invention provides a heat pump that includes: a compressor, a switching valve, an indoor heat exchanger, a first expansion valve, and an outdoor heat exchanger, wherein the outdoor heat exchanger includes: a primary heat exchanging unit connected with the first expansion valve through a refrigerant pipe and through which outdoor air exchanges heat; a secondary heat exchanging unit connected with the switching valve through a refrigerant pipe, disposed behind the primary heat exchanging unit in the flow direction of outdoor air, and through which the outdoor air, which has exchanged heat through the primary heat exchanging unit, exchanges heat; a connection pipe that connects the primary heat exchanging unit and the secondary heat exchanging unit with each other; and a second expansion valve that is disposed in the connection pipe. Therefore, it is possible to improve both cooling performance and heating performance with minimum parts and a simple structure.

Abstract: A heat pump is provided including a plurality of lines having refrigerant flowing therethrough. A reversing valve is provided including a selector mechanism having a plurality of cavities formed therein and extending therethrough. A source of motion is coupled to the selector mechanism for movement of the selector mechanism. Each one of the plurality of cavities fluidly couples at least two of the plurality of lines. The selector mechanism is movable between a cooling mode and a heating mode so that the cavities fluidly couple different ones of the plurality of lines in each of the cooling mode and the heating mode. The selector mechanism will maintain its position with respect to the plurality of lines when the source of motion is de-energized, regardless of a pressure differential between different ones of the plurality of lines.

Abstract: A refrigerant cycle device includes a first refrigerant passage for guiding refrigerant from a refrigerant radiator to an inlet side of an outdoor heat exchanger, a first throttle part capable of varying an opening area of the first refrigerant passage, a second refrigerant passage for guiding the refrigerant from the outdoor heat exchanger to a compressor-suction side, a first opening/closing part for opening/closing the second refrigerant passage, a third refrigerant passage for guiding the refrigerant from the outdoor heat exchanger to the compressor-suction side via an evaporator, a second throttle part capable of varying an opening area of the third refrigerant passage, a bypass passage for guiding the refrigerant flowing between the refrigerant radiator and the first throttle part to a position between the outdoor heat exchanger and the second throttle part in the third refrigerant passage, and a second opening/closing part for opening/closing the bypass passage.

Abstract: Regarding an engine driven heat pump in which an engine, a compressor, a refrigerant circuit, and a generator are stored in a main body package, an engine actuation battery to actuate the engine, a battery charging circuit to charge the engine actuation battery, and an inverter to convert output power from the generator into a predetermined voltage and a predetermined frequency are stored in a separate body package, which is a separate body with respect to the main body package, and a front surface and a back surface of the separate body package is made up of an area in such a manner as to fit in a side surface of the main body package, and the separate body package is provided on a side surface near to the generator, out of side surfaces of the main body package and supported by the main body package.

Abstract: An air-conditioning system for a vehicle includes a switching heat exchanger. The switching heat exchanger includes a heat exchanger core, a receiver tank, and a switch valve. The switch valve may be arranged between the heat exchanger core and the receiver tank to control the flow of refrigerant. A controller can be configured to control the switch valve in an access position during a cooling mode and a bypass position during a heating mode. In the access position, the heat exchanger core is in communication with the receiver tank such that the refrigerant flows from a primary region of the heat exchanger core to the receiver tank. In the bypass position, the heat exchanger core is in communication with its outlet such that the refrigerant from the primary region flows out from the switching heat exchanger.

Abstract: A first switching device includes a first and second inputs connected to first and second power lines, respectively, the first and second power lines for receiving a first voltage. The first switching device selectively connects and disconnects the first and second inputs to and from first and second nodes, respectively. A second switching device includes a third input connected to the first node, includes a fourth input connected to a third power line, and includes a first output connected to a first end of a stator winding. A third switching device includes a fifth input connected to the second node and includes a sixth input connected to a fourth power line, the third and fourth power lines for receiving a second voltage that is less than the first voltage. The third switching device further includes a second output connected to a second end of the stator winding. A compressor crankcase heating control module controls the second and third switching devices to control compressor crankcase heating.

Abstract: In a refrigeration cycle system, switching is allowed between a parallel operation mode and a series operation mode. In the parallel operation mode, a refrigerant, upon leaving a load side heat exchanger, parallelly flows through a high-pressure side passage of each of a first internal heat exchanger and a second internal heat exchanger and then flows into an expansion valve. In the series operation mode, the refrigerant, upon leaving the load side heat exchanger, flows through the high-pressure side passage of the first internal heat exchanger, further flows through the high-pressure side passage of the second internal heat exchanger, and then flows through a high-pressure side bypass pipe into the expansion valve.

Abstract: An outdoor unit of an air-conditioner and two-pipe and three-pipe air-conditioning systems having the same are provided. The outdoor unit includes a compressor defining an outlet and an inlet; a first four-way valve defining a first valve communicated with the outlet, second and third ports communicated with the inlet; a second four-way valve defining second and third ports communicated with the inlet; an outdoor heat exchanger defining a first refrigerant valve Communicated with the fourth port of the first four-way valve; a first gas pipe defining a first end connected with the second and third ports of the first and second four-way valves and, the inlet; a second gas pipe defining a first end connected with the fourth port of the second four-way valve; a third gas pipe defining a first end connected with the outlet and a second end connected with the first port of the second four-way valve.

Abstract: A heat pump includes an evaporator with an evaporator inlet and an evaporator outlet; a compressor for compressing operating liquid evaporated in the evaporator; and a condenser for condensing evaporated operating liquid compressed in the compressor, wherein the condenser includes a condenser inlet and a condenser outlet, wherein the evaporator inlet is connected to a return from a region to be heated, and wherein the condenser inlet is connected to a return from a region to be cooled.

Abstract: The disclosure discloses a multi-type air conditioner system including: an outdoor machine, a refrigerant pipe connected with an output end of the outdoor machine, a manifold connected with an input end of the refrigerant pipe, an indoor machine connected with an output end of the refrigerant pipe, and a controller connected respectively with the outdoor machine and the indoor machine through a shielded signal line, wherein the multi-type air conditioner system may further include: a pipe set including a composite pipe, a third cutoff valve, a third filter, a third electronic expanding valve, a fourth cutoff valve and a pipe control board. With the disclosure, heating can be provided by precisely controlling indoor temperature and effectively lower power consumption.

Abstract: A heat pump system is provided that includes a flow directing system that allows an outdoor heat exchanger to be switchable between a single-pass arrangement and a two-pass arrangement. The heat pump system includes an outdoor heat exchanger, an indoor heat exchanger, and a flow directing system of check valves and piping segments that enable switching of the outdoor heat exchanger between the single-pass and the two-pass arrangement. The outdoor heat exchanger is operable as a two-pass condenser in the cooling mode and as a single-pass evaporator in the heating mode.

Abstract: Disclosed are embodiments of a partitioned evaporator for a reversible heat pump system operating in the heating mode. Embodiments include a partitioned evaporator having a first part and a second part, the first part exchanging heat between a working fluid upstream from a reversible metering device, and the working fluid downstream from the reversible metering device. Heat energy from the upstream fluid is recovered and introduced into the first and second parts aiding in the evaporation of the working fluid rather than being rejected and unused.

Abstract: A heat pump circuit including a compressor that compresses a working fluid from a gas in a low pressure, low temperature first state to a high pressure, a high temperature second state. A first subflow of the working fluid is condensed into a gaseous/liquid mixture and assumes a third state by the working fluid delivering heat to a first medium. The first subflow of the working fluid is expanded and returns to a gas in the first state by absorbing heat from a second medium, whereupon the working fluid completes the cycle again. A second subflow of the compressed working fluid is expanded from the second state and the energy contents in the second subflow converted into electrical energy, whereafter the expanded working fluid is returned to the compressor after passage of the evaporator, or after expansion in the energy converter from the second to the first state.

Abstract: A heat pump includes a main refrigerant circuit having a compressor, an indoor heat exchanger, and an outdoor heat exchanger, and a reversing valve. A biflow expansion valve is configured to receive condensed liquid refrigerant and to expand the refrigerant. A cooling circuit in fluid communication with the main refrigerant line includes an expansion device configured to receive a portion of condensed liquid refrigerant from the main refrigerant circuit and to expand the portion of condensed liquid refrigerant. A heat sink is configured to receive the expanded portion of refrigerant from the expansion device. Power electronics are coupled to the heat sink such that the portion of expanded refrigerant from the expansion device passes through the heat sink and cools the power electronics.

Abstract: In a case of a heating operation in which the use side heat exchanger functions as a condenser when an outside temperature is a predetermined low temperature, a low-outside-temperature heating operation start-up mode in which, while a refrigerant discharged from the compressor is caused to flow into the use side heat exchanger, a refrigerant is supplied to the injection port of the compressor via the injection pipe and part of the refrigerant that has transferred heat in the heat source side heat exchanger is supplied to the compressor, is followed by a low-outside-temperature heating operation mode in which the refrigerant discharged from the compressor is supplied to the injection port of the compressor via the injection pipe while the refrigerant being caused to flow into the use side heat exchanger.

Abstract: A heat pump for heating a vehicle interior includes a compressor arranged in a heat-pump circuit of a working medium, a condenser, a throttle valve and an evaporator. Gaseous working medium is compressed in the compressor. The compressor outlet is connected to the inlet of the condenser in which the working medium condenses, at the same time discharging heat, the heat being delivered as useful heat directly or indirectly to a consumer. The condenser is followed by a jet pump, to which the liquid working medium coming from the condenser is delivered as driving medium and to which the gaseous working medium flowing out from the evaporator is delivered as suction medium, in such a way that the driving medium and suction medium are compressed in the jet pump as a two-phase mixture. The jet-pump outlet is connected to the inlet of a separator, to which the two-phase mixture is delivered and in which the gaseous working medium is separated from the liquid working medium.

Abstract: A vehicle heat pump air-conditioning system is provided, which is capable of securing a temperature linearity characteristic during dehumidifying heating, slowing progression of a frost formation on an exterior evaporator during heating, and stably continuing a heating operation while suppressing variations in a blowout temperature. In a cooling refrigeration cycle (14) becoming a base, an interior condenser (8) disposed in a HVAC unit (2) is connected to an exterior condenser (10) in parallel via switching means (15), an exterior evaporator (17) is connected to first decompression means (12) and an interior evaporator (7) in parallel via second decompression means (16), a heating heat pump cycle (18) is configured, the first decompression means (12) and the second decompression means (16) are on-off valve function attached decompression means (12, 16), and the exterior evaporator (17) and the interior evaporator (7) can be simultaneously used during dehumidifying heating and heating.

Abstract: A heat pump performs a simultaneous air-conditioning and heating operation through the addition of a flow path switching apparatus. The heat pump may include a plurality of outdoor units, a plurality of indoor units, and a plurality of flow path switching apparatuses that switch a flow path between an outdoor unit and an indoor unit. A refrigerant flow path may be formed from the outdoor unit to the indoor unit via a high-pressure gas pipe. The flow path switching apparatuses may switch a flow path so that a refrigerant flow path is formed from the indoor unit to the outdoor unit via a low-pressure gas pipe. The heat pump may further include an indoor unit mode controller that is connected to the plurality of outdoor units through a liquid pipe, and which is connected to each of the plurality of flow path switching apparatuses.

Abstract: A compressor includes: a heat exchanger configured to discharge heat generated during compression outside the compressor; a cooling liquid inlet port through which cooling liquid flowing from outside the compressor into the compressor passes; and a cooling liquid outlet port through which the cooling liquid flowing out of the compressor from inside the compressor passes. The compressor is configured such that an operation mode is switchable between a first mode in which the cooling liquid passing through the cooling liquid inlet port flows in the heat exchanger in a predetermined first direction and passes through the cooling liquid outlet port, and a second mode in which the cooling liquid passing through the cooling liquid inlet port flows in the heat exchanger in a second direction opposite to the first direction and passes through the cooling liquid outlet port.

Abstract: In the case of a heating operation in which a use side heat exchanger functions as a condenser when the outside air has a predetermined low temperature, a low-outside-air-temperature heating operation start mode is executed in which, while a refrigerant, as discharged from a compressor, flows into the use side heat exchanger, the refrigerant, upon flowing into the injection pipe, merges with a part of the refrigerant discharged from the compressor, which has traveled through the connecting pipe and has transferred heat in the heat source side heat exchanger, and a merged refrigerant is supplied to the injection port of the compressor, and thereafter a low-outside-air-temperature heating operation mode is executed in which the refrigerant, as discharged from the compressor, is supplied to the injection port of the compressor via the injection pipe while flowing into the use side heat exchanger.

Abstract: A triple-pipeline type first outdoor unit 2 connected to three inter-unit pipelines 5 made up of a high-pressure gas pipe 7, a low-pressure gas pipe 6, and a fluid pipe 8 and a second outdoor unit 3 connected by two pipelines of a gas pipe 35 and a fluid pipe 36 are provided, in which a fluid pipe 36 of this second outdoor unit 3 is connected to the fluid pipe 8, while a gas pipe 35 of the second outdoor unit is selectively connected to the high-pressure gas pipe 7 or the low-pressure gas pipe 6 using a valve-element kit 50 having a four-way valve 51.

Abstract: A valve body in each of heat medium flow switching devices has an open portion. When the length from a connection between a first passage pipe and a third passage pipe to a connection between a second passage pipe and the third passage pipe is defined as a casing passage width, a valve body passage width of the open portion in a direction substantially perpendicular to the axis of the valve body is smaller than the casing passage width.

Abstract: An air-conditioning apparatus includes an outdoor-side flow rate control device (a fourth flow rate control device) that generates an intermediate pressure for injection into a compressor, and a bypass flow rate control device (a sixth flow rate control device) that is placed at a bypass pipe allowing bypassing of an outdoor heat exchanger in parallel to the outdoor-side flow rate control device and that controls the amount of heat exchange of the outdoor heat exchanger together with the outdoor-side flow rate control device.

Abstract: An air-conditioning apparatus includes a compressor, a four-way valve, expansion means, and an indoor heat exchanger, and further includes a check valve disposed between a discharge side of the compressor and the four-way valve, a first solenoid valve disposed between the expansion means and the indoor heat exchanger, and a controller. Opening and closing of the first solenoid valve are controllable. The controller switches the four-way valve and switches the first solenoid valve between open and closed states. When a heating operation is stopped, the controller switches the four-way valve from connection for the heating operation to connection for a cooling operation, closes the first solenoid valve, and then stops the compressor.

Abstract: A heat pump device includes an air conditioning control device configured to switch the heat pump device among a plurality of operation modes including an air-heating operation mode in which an indoor heat exchanger serves as a radiator and an outdoor heat exchanger serves as a heat absorber, and an air-cooling operation mode in which the indoor heat exchanger serves as a heat absorber and the outdoor heat exchanger serves as a radiator. The air conditioning control device switch a refrigerant pipe such that refrigerant is, in the air-cooling operation mode, supplied to part of the outdoor heat exchanger serving as a refrigerant inlet in the air-heating operation mode.

Abstract: A heat pump unit (1) comprising at least one circuit (2) adapted to perform a heat pump cycle with a respective operating fluid, which comprises: an evaporator (S8) adapted to perform the evaporation of the operating fluid at a lower pressure of said heat pump cycle and intended to be connected to an external circuit of a first thermal user installation in a cooling operating mode of said heat pump unit; a condenser (S4) adapted to perform the condensation of the operating fluid at a higher pressure of said heat pump cycle and intended to be connected to an external circuit of a heat sink (20) in a cooling operating mode of said heat pump unit (1), and a first heat exchanger (S6), adapted to perform an undercooling of the operating fluid at the higher pressure of said heat pump cycle after the condensation of the same.

Abstract: A heat pump unit (1) comprises at least one main circuit (2) adapted to perform a main heat pump cycle with a respective operating fluid, which comprises: a main condenser (S4) adapted to perform the condensation of the operating fluid of the main heat pump cycle and intended to be connected to an external circuit of a first thermal user plant (10) in a heating operating mode of said heat pump unit (1), a first heat exchanger (S2), connected downstream of the main condenser (S4) and upstream of expansion means (L2) of said the main circuit (2), adapted to perform an undercooling of the operating fluid of the main heat pump cycle after the condensation of the same in the main condenser (S4), and a main evaporator (S8) adapted to perform the evaporation of the operating fluid of the main heat pump cycle and intended to be connected to an external circuit of a heat sink (20) in a heating operating mode of said heat pump unit (1).

Abstract: Heat pumps with improved defrost cycles and methods of defrosting heat exchangers, for example, having microchannel outdoor heat exchangers. A heat exchanger has three types of connection points that are used during a defrost cycle. Two connection points are used to deliver hot refrigerant gas to the heat exchanger and one connection point is where refrigerant exits the heat exchanger. Two of the connection points are at the same header and during at least part of the defrost cycle, at least part of the hot refrigerant gas is passed through that header without passing through any cross tubes of the heat exchanger. A defrost valve in a refrigerant conduit opens during the defrost cycle to deliver hot refrigerant gas to the connection point on the header. In a number of embodiments, the defrost valve is open only during a portion of the defrost cycle.

Abstract: A heat medium relay unit and an air-conditioning apparatus or the like are provided that are compact and have improved serviceability while achieving energy saving. A heat medium relay unit according to the invention includes heat medium delivering devices and heat medium flow switching devices (first heat medium flow switching devices and second heat medium flow switching devices) that are provided so as to be detachable from a predetermined side.

Abstract: A refrigeration apparatus includes a multistage compression mechanism, switching mechanisms, intercoolers, oil separators, and a control unit. The multistage compression mechanism has one high-stage-side compression mechanism and a plurality of low-stage-side compression mechanisms connected in series. The switching mechanisms are connected to blow-out pipes of the low-stage-side compression mechanisms. The switching mechanisms switch between cooling and heating operation cycles. The intercoolers cool refrigerant blown out from the low-stage-side compression mechanisms during the cooling cycle. The oil separators are disposed between the switching mechanisms and the intercoolers. The oil separators separate lubricating oil from refrigerant blown out from the low-stage-side compression mechanisms during the cooling cycle. The control unit controls the multi-stage compression mechanism and the switching mechanisms.

Abstract: A refrigeration apparatus includes a multi-stage compression mechanism, heat source-side and usage side heat exchangers each operable as a radiator/evaporator, a switching mechanism switchable between cooling and heating operation states, a second-stage injection tube, an intermediate heat exchanger and an intermediate heat exchanger bypass tube. The intermediate heat exchanger bypass tube ensures that refrigerant discharged from the first-stage compression element and drawn into the second-stage compression element is not cooled by the intermediate heat exchanger during a heating operation. Injection rate optimization controls a flow rate of refrigerant returned to the second-stage compression element through the second-stage injection tube so that an injection ratio is greater during the heating operation than during a cooling operation.

Abstract: An air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a converting unit, a first injection module, and a second injection module. The first injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in a heating operation and supercools refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger in a cooling operation. The second injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in the heating operation and injects refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger to the compressor in the cooling operation.

Abstract: A cooling device for electric equipment includes a cooling unit for cooling inverter elements. Cooling unit includes a heat mass which has a surface provided with the inverter elements and a back surface arranged on a back side of surface to form a heat mass inner tank arranged between the surface and the back surface and transfers heat generated at the inverter elements, a fin portion which is provided on the back surface and radiates heat transferred through the heat mass, air-conditioner coolant pipelines which are provided on the surface and form a coolant passage through which a coolant for vehicle cabin air-conditioning flows, and a water pump which supplies and discharges coolant water to and from the heat mass inner tank. With such a configuration, a cooling device for electric equipment which is excellent in cooling efficiency is provided.

Abstract: An air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a converting unit, an accumulator, and injection module, a supercooling valve, and an injection valve. The injection module expands and vaporizes a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger in the heating operation. The supercooling valve is disposed between the injection module and the accumulator and is opened to direct the portion of the refrigerant vaporized in the injection module to the accumulator in the heating operation and then closed after a predetermined time passes. The injection valve is disposed between the injection module and the compressor and is opened when the supercooling valve is closed in the heating operation, thereby injecting the portion of the refrigerant vaporized in the injection module to the compressor.

Abstract: The invention is provided with: a housing having a refrigerant inlet and plurality of refrigerant outlets, through which a refrigerant flows in or out; and a valve body having refrigerant channels which are movably accommodated in the housing and can be selectively switched between communicating with the refrigerant inlet and with each of the refrigerant outlets; the refrigerant channels being partially constituted of an orifice and able to be selectively switched between a route passing through the orifice and a route not passing therethrough.

Abstract: A compressor may include a fluid-injection source, a shell, and first and second scroll members. The shell may define a suction pressure region. The first scroll member may include a first end plate and a first scroll wrap extending therefrom. The second scroll member may include a second end plate and a second scroll wrap extending therefrom. The first and second scroll wraps may cooperate to define a plurality of fluid pockets. The second end plate may include a first passage and a second passage. The second end plate may also include a first port and a second port extending through the second end plate and communicating with at least one of the fluid pockets. The first passage may be in communication with the suction pressure region. The second passage may be in communication with the fluid-injection source.

Abstract: An air conditioner of an electric vehicle according to the present invention includes a compressor for compressing refrigerant, an indoor heat exchanger for performing heat exchange between refrigerant introduced into the indoor exchanger after emerging from the compressor and air, an outdoor heat exchanger for performing heat exchange between refrigerant introduced into the outdoor heat exchanger and outdoor air, a first expansion device arranged between the indoor heat exchanger and the outdoor heat exchanger, to expand refrigerant introduced into the first expansion device, an evaporator for evaporating refrigerant introduced into the evaporator, to dehumidify indoor air, a second expansion device arranged between the outdoor heat exchanger and the evaporator, to expand refrigerant introduced into the second expansion device, a first bypass line connected to guide refrigerant emerging from the indoor heat exchanger to flow toward the evaporator after bypassing the first expansion device and the outdoor hea

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit of a refrigeration cycle through which a refrigerant that transits in a supercritical state is allowed to flow, and a flow dividing device that divides the flow of a high-pressure liquid refrigerant in a subcritical state into two or more parts. The flow dividing device is configured such that the device is oriented substantially in the horizontal direction or upward in the vertical direction relative to the direction of flow of the refrigerant in a liquid state. With such a configuration, the flow of refrigerating machine oil is equally divided, thus offering high energy saving while keeping heat-medium conveyance power at a low level without reducing the heat exchanging performance.

Abstract: A vehicle air-conditioning device is provided that makes it possible to avoid the occurrence of condensation at a heat exchanger, and to avoid decreases in the heat exchange efficiency of the heat exchanger caused by uneven temperature distribution in the heat exchanger itself. This vehicle air-conditioning device employs a configuration comprising: a heat exchanger that performs heat exchange between air passing through a first flow path and air flowing through a second flow path; and a switching means that alternately switches either the first flow path or the second flow path from a discharge path that discharges the air inside the vehicle toward the outside of the vehicle to an intake path that guides air from outside of the vehicle into the vehicle, and switches the other flow path from the intake path to the discharge path.

Abstract: A refrigerating and air-conditioning apparatus suppresses liquid backflow to a compressor with a simple configuration, and reduces annual power consumption. An outdoor unit and an indoor unit are connected to each other by a gas-side connecting pipe and a liquid-side connecting pipe to form a refrigerant circuit in which a compressor, a four-way valve, an indoor heat exchanger, a refrigerant heat exchanger, an expansion valve, an outdoor heat exchanger, and an accumulator are sequentially connected. The refrigerant heat exchanger transfers heat between a high-pressure-side refrigerant flowing between the expansion valve and an outdoor-unit liquid pipe connecting portion and a low-pressure-side refrigerant on an outlet side of the accumulator.

Abstract: A building built-in air conditioning system comprising: an external heat exchanger (1), a reversing valve (2), a compressor (4), and microporous tubes (9, 10, 11). The microporous tubes are metal capillaries bound on a construction steel bar (12) and integrated with the concrete by casting.

Abstract: To provide an air-conditioning apparatus capable of achieving energy saving. The air-conditioning apparatus capable of executing an oil collection mode that collects a refrigerating machine oil stagnating in heat exchangers related to heat medium into a compressor by changing a flow velocity or a flow direction of the refrigerant flowing in the heat exchangers related to heat medium depending on each operation mode.

Abstract: A rotating valve includes an inlet region, an outlet region, and a switching region having a switching member that can be rotated about an axis. In a first position of the switching member the plurality of inlets are connected to the plurality of outlets in a first association, and in a second position of the switching member the plurality of inlets are connected to the plurality of outlets in a second association. The switching member has a plurality of openings through which the fluid flows flow axially in the direction of the rotation axis and are moved together with the switching member. The openings alternately cover a plurality of stationary, axially directed openings in the course of the rotation of the switching member. Different associations of the inlets with the outlets are carried out by the alternating covering of the axially directed openings.