An air-conditioning apparatus includes a main circuit in which a compressor, a refrigerant flow switching device, a load side heat exchanger, a load side expansion device, and a plurality of heat source side heat exchangers are sequentially connected. When the plurality of heat source side heat exchangers are used as condensers, the first heat source side heat exchanger and the second heat source side heat exchanger are connected in series. When the plurality of heat source side heat exchangers are used as evaporators, the first heat source side heat exchanger and the second heat source side heat exchanger are connected in parallel. A distribution adjustment header on an inlet side of at least either the first heat source side heat exchanger or the second heat source side heat exchanger when the plurality of heat source side heat exchangers are used as evaporators.

A system includes first and second compressors arranged in parallel, a condenser, expansion device, evaporator, and flow control device fluidly connected. The first compressor includes a first lubricant sump and the second compressor including a second lubricant sump. A lubricant transfer conduit fluidly connects the first lubricant sump and the second lubricant sump.

The flow control device is disposed between the evaporator and the first and second compressors, and includes a fluid inlet and two fluid outlets. A first of the two fluid outlets is fluidly connected to the first compressor, a second of the two fluid outlets is fluidly connected to the second compressor. The second fluid outlet includes a nozzle disposed within a flow passage of the flow control device such that a space is maintained between an outer surface of the nozzle and an inner surface of the flow passage.

A heat exchanger includes: a plate-like fin having one end and an other end in a first direction; and a first heat transfer tube and a second heat transfer tube that each extends through the fin and that are adjacent to each other in a second direction. A portion to which the fin and the first heat transfer tube are connected and a clearance portion that separates between the fin and the first heat transfer tube are disposed between the fin and the first heat transfer tube. The clearance portion is disposed at one end side in the first direction relative to an imaginary center line that passes through a center of the first heat transfer tube in a long side direction and that extends along a short side direction.

A dual pipe according to present invention includes an outer pipe having a valley/ridge portion on an outer circumferential surface thereof, and an inner pipe having a valley/ridge portion formed on an inner circumferential surface thereof and inserted into the outer pipe. In the dual pipe, the inner pipe and the outer pipe are threadedly engaged with each other. A low pressure refrigerant passes through the inner pipe. In order to secure a passage of a high pressure refrigerant in a space between the outer circumferential surface of the inner pipe and the inner circumferential surface of the outer pipe, a part of the helical valley/ridge portion formed on the outer circumferential surface of the inner pipe is composed of a multiple-helix helical valley/ridge portion. A part of the helical valley/ridge portion formed on the inner circumferential surface of the outer pipe is composed of a single-helix helical valley/ridge portion (more precisely, a helical valley/ridge portion having a smaller number of helixes than the number of helixes of the multiple-helix helical valley/ridge portion of the inner pipe). That is, the high-pressure refrigerant flows through a space between a valley of a non-threadedly-engaged helical valley/ridge portion of the multiple-helix helical valley/ridge portion, which is formed on the outer circumferential surface of the inner pipe, and the outer pipe.

An oil separator includes a separation container. The separation container has a side surface portion to which an inlet pipe is attached. The separation container has an upper surface portion to which an outlet pipe is attached. An oil reservoir is provided in a lower portion of the separation container. The separation container has a lower surface portion to which an oil return pipe is attached. The separation container has an inner wall surface provided with a liquid passage section. The liquid passage section is provided with a groove. The groove is disposed to extend in a direction of gravity toward the oil reservoir. The groove is formed to be gradually increased in depth from an upper portion of the groove toward a lower portion thereof.

Materials, components, and methods consistent with the present invention are directed to the fabrication and use of micro-scale channels with a fluid, where the temperature and flow of the fluid is controlled through the geometry of the micro-scale channel and the configuration of at least a portion of the wall of the micro-scale channel and the constituent particles that make up the fluid. Moreover, the wall of the micro-scale channel and the constituent particles are configured such that collisions between the constituent particles and the wall are substantially specular.

A system for controlling a temperature of an electrical energy storage device may include a coolant circuit through which a coolant is flowable, a refrigerant circuit through which a refrigerant is flowable, a first coolant cooler, a support structure, and at least one molded component. The coolant circuit may be thermally coupled to the electrical energy storage device such that heat is at least one of (i) absorbable from the electrical energy storage device via the coolant and (ii) dissipatable to the electrical energy storage device via the coolant. The refrigerant circuit may be configured as part of a heat pump. The first coolant cooler may be configured to transfer heat between the coolant and the refrigerant. The at least one molded component may be structured separately from the support structure and may include a foamed plastic.

A fluid treatment device comprises: a throttling part; a three-way pipe detachably connected to the throttling part; a drainage part detachably connected to the three-way pipe, with one end of the drainage part being provided with an expansion portion, and the throttling part and the drainage part being coaxial; and a separation part, the expansion portion extending into a space enclosed by side walls of the separation part, a fluid flowing in from a first fluid inlet and a fluid flowing in from a second fluid inlet flowing into the separation part through the expansion portion, and the separation part separating the fluids into a gas phase fluid and a liquid phase fluid, wherein the range of an included angle between an axis of the drainage part and an axis of the separation part is 35 degrees to 60 degrees. The fluid treatment device integrates the throttling part, the three-way pipe, the drainage part and the separation part.

The present invention provides a heat exchanger having a heat exchanging portion HE including a plurality of paths through which a refrigerant flows and a plurality of columns of fin plate that exchange heat between the refrigerant and air, wherein, in a case where the heat exchanging portion functions as a condenser, the refrigerant is flown from a header into the heat exchanging portion HE via the plurality of paths, every two paths of the plurality of paths merge into one single path by branching/merging pipes after the refrigerant has flown through one fin plate, before the refrigerant flows through the other fin plate so as to flow out of the heat exchanging portion HE, wherein a difference in height between the highest path and the lowest path in a vertical direction is set equal to or less than half of a height of the heat exchanging portion HE.

An internal temperature adjusting device includes a heat pump, an internal heat exchanger, and an external heat exchanger. The internal heat exchanger is configured to function as one of an evaporator or a condenser of the heat pump, and exchange heat between a heat medium and air inside the container. The external heat exchanger is configured to function as the other one of the evaporator or the condenser, and exchange heat between the heat medium and air outside the container. The external heat exchanger includes a plurality of heat exchanging members separated from each other. According to the internal temperature adjusting device, drainage of the external heat exchanger as a whole can be secured.