Panasonic Intellectual Property Management Co., Ltd.

Panasonic Holdings Corporation

Bunki Kawano

Tomoichiro Tamura

Takahiro Matsuura

Kou Komori

Hidetoshi Taguchi

Masaru Matsui

Tadayoshi Shoyama

Michiyoshi Kusaka

Iori Maruhashi

Yoshimi Hayashi

Hongzhi Sun

Nobukazu Shimodahira

A refrigeration apparatus includes a container such as an evaporator for holding refrigerant, and a compressor for compressing refrigerant vapor. The compressed vapor is returned to the container, and stored as liquid. The liquid refrigerant is withdrawn from the container and then returned to the container via a first path through a heat exchanger for cooling a space, or a second path that does not pass through the heat exchanger. Upon returning to the container, the liquid refrigerant is at least partly evaporated due to the reduced pressure in the container caused by the operation of the compressor, and the container is cooled by the latent heat of evaporation. Thus, the container can act as a cold storage unit. The cold storage effect is increased when the refrigerant is returned to the container via the second path.

Refrigeration device

A refrigeration cycle apparatus includes an evaporator, a first compressor, an intercooler, a second compressor, a condenser, and a refrigerant liquid supply passage. The intercooler stores refrigerant liquid and also cools refrigerant vapor compressed by the first compressor and expels it. The second compressor sucks in the refrigerant vapor expelled from the intercooler and compresses it. The intercooler includes a container, an intercooling passage, and a pump. The container contains a vapor space and stores refrigerant liquid. The intercooling passage is a passage in which a part of the refrigerant liquid stored in the container flows and that supplies the part of the refrigerant liquid to the vapor space. The pump pumps a part of the refrigerant liquid stored in the container to the vapor space.

Refrigeration cycle apparatus

An ejector includes an atomization mechanism that is disposed at an end of a first nozzle and that atomizes a working fluid in a liquid phase while maintaining the liquid phase. The atomization mechanism includes an orifice and a collision plate. When the collision plate is orthographically projected onto a projection plane, in a projection of the collision plate, at least one point on a contour of the collision surface is disposed closer to a reference point than a second reference line, which is a line including the collision end point and perpendicular to the first reference line.

Ejector and heat pump apparatus

An ejector includes an atomization mechanism arranged at an end of a first nozzle. The atomization mechanism includes a plurality of orifices and a collision plate against which each of a plurality of jets ejected from the plurality of orifices collides. The collision plate includes a first principal surface and a second principal surface as a collision surface against which the jet collides, each of the first principal surface and the second principal surface extending toward an outlet of the ejector. The plurality of orifices includes a plurality of first orifices arranged on a side of the first principal surface of the collision plate and a plurality of second orifices arranged on a side of the second principal surface of the collision plate.

Ejector having an atomization mechanism and heat pump apparatus

It is aimed to reduce the size of heat exchange tubes and also to reduce pressure loss of a fluid flowing in an external flow path formed between adjacent heat exchange tubes. A first projecting portionand a second projecting portionof a first heat exchange tubeA are joined to portions around an inletC and outletD of a second heat exchange tubeB. A first flow path forming portion, a second flow path forming portion, and a third flow path forming portionof an internal flow pathof each of the first heat exchange tubeA and the second heat exchange tubeB face a first thin portionA and a second thin portionB of the second heat exchange tubeB or the first heat exchange tubeA across an external flow path. The first flow path forming portions, the second flow path forming portions, and the third flow path forming portionsof the first heat exchange tubeA and the second heat exchange tubeB are arranged in a staggered pattern in a width direction of the heat exchange tubes

Heat exchanger

An ejector includes a first nozzle, a second nozzle, an atomization mechanism, and a mixer. A working fluid in a liquid phase is supplied to the first nozzle as a drive flow. A working fluid in a gas phase is sucked into the second nozzle. The atomization mechanism is disposed at an end of the first nozzle and atomizes the working fluid in a liquid phase while maintaining the liquid phase. The mixer generates a fluid mixture by mixing the atomized working fluid generated by the atomization mechanism and the working fluid in a gas phase sucked into the second nozzle. The atomization mechanism includes an ejection section that generates a jet of the working fluid in a liquid phase and a collision surface with which the jet from the ejection section collides. The collision surface is inclined with respect to a direction in which the jet flows.

Ejector and heat pump apparatus including the same

An air conditioner (A) as a refrigeration apparatus includes: a refrigerant circuit () including an evaporator (), a first compressor (), a vapor cooler (), a second compressor (), and a condenser () that are connected in this order; a heat release circuit () that allows a heat medium to circulate between the condenser () and a first heat exchanger () that releases heat to the atmosphere; and a heat absorption circuit () that allows a heat medium to circulate between the evaporator () and a second heat exchanger (). The vapor cooler () is a heat exchanger that exchanges heat between a refrigerant vapor compressed by the first compressor () and the heat medium flowing in the heat release circuit () or the heat medium flowing in the heat absorption circuit ().

A refrigerating cycle apparatus includes an evaporator, a compressor, a condenser, a feeding channel, a main circuit that circulates a refrigerant including fluid whose saturated vapor pressure at ordinary temperature is a negative pressure as a main component, a heat absorption circuit including a heat absorption heat exchanger, a heat release circuit including a heat release heat exchanger, an internal heat exchanger that allows indirect heat exchange between the fluid flowing through the heat absorption circuit and the fluid flowing through the heat release circuit, at least one of a heat absorption bypass channel and a heat release bypass channel, and at least one of a flow rate adjustment mechanism for heat absorption that adjusts a flow rate of the fluid flowing through the heat absorption bypass channel and a flow rate adjustment mechanism for heat release that adjusts a flow rate of the fluid flowing through the heat release bypass channel.

Refrigerating cycle apparatus

A heat exchange apparatus () includes a first heat exchanger (), an ejector (), a first extractor (), a first pump (), and a liquid path (). The ejector () produces a merged refrigerant flow using a refrigerant vapor and a refrigerant liquid flowing from the first heat exchanger (). The first extractor () receives the merged refrigerant flow from the ejector (), and extracts the refrigerant liquid from the merged refrigerant flow. The first pump () is provided in the liquid path (). The refrigerant liquid is pumped by the first pump () from the first extractor () to the ejector ().

Heat exchanging device and heat pump

A pump device (A) includes: an impeller () that rotates about an axis of rotation (A); an inlet passage () that extends along the axis of rotation (A) of the impeller (); a volute chamber () provided around the impeller (); a high-pressure chamber () provided around the inlet passage (); a circumferential wall () that separates the inlet passage () and the high-pressure chamber (); and a bypass passage () that communicates the volute chamber () and the high-pressure chamber (). The circumferential wall () has a plurality of through holes () provided in a circumferential direction. The central axis (B) of each of the through holes () is included in a plane substantially perpendicular to the axis of rotation (A). The central axis (B) is inclined with respect to a reference line (L). The direction of inclination of the central axis (B) with respect to the reference line (L) is determined so that an inlet passage side opening () of the through hole () is located downstream from a high-pressure chamber () side opening () in a rotational direction of the impeller ().

Pump device and pump system

A refrigeration cycle apparatus (A) includes: a main circuit () composed of an evaporator (), a first compressor (), an intercooler (), a second compressor (), and a condenser () which are connected in this order; and an evaporation-side circulation path () that allows a refrigerant liquid retained in the evaporator () to circulate via a heat exchanger for heat absorption (). The intercooler () is a heat exchanger that allows a refrigerant vapor compressed by the first compressor () to be cooled by the refrigerant liquid. A supply path () supplies, to the intercooler (), a portion of the refrigerant liquid flowing in the first circulation path (), and a recovery path () recovers the refrigerant liquid from the intercooler () to the evaporator ().

A refrigeration cycle apparatus (A) includes: an evaporator () that retains a refrigerant liquid and that evaporates the refrigerant liquid therein; a condenser () that condenses a refrigerant vapor therein and that retains the refrigerant liquid; a vapor channel (A) that is provided with a compressor () and that directs the refrigerant vapor from the evaporator () to the condenser (); a liquid channel (B) that directs the refrigerant liquid from the condenser () to the evaporator (); a condensation-side circulation path () that allows the refrigerant liquid retained in the condenser () to circulate via a heat exchanger for heat release () and that is provided with a condensation-side pump () at a position upstream of the heat exchanger for heat release (); and a back-flow path () that directs a portion of the refrigerant liquid flowing in a section downstream of the heat exchanger for heat release () in the condensation-side circulation path () to a section upstream of the condensation-side pump () in the condensation-side circulation path () or to a bottom of the condenser ().

Refrigeration cycle using a refrigerant having negative saturated vapor pressure with condensation path backflow control and refrigeration cycle using a refrigerant having negative saturated vapor pressure with evaporation path load bypass

A refrigeration apparatus (air conditioner (A)) includes: a vapor channel (A) that directs a refrigerant vapor from an evaporator () to a condenser (); a liquid channel (B) that directs a refrigerant liquid from the condenser () to the evaporator (); a first circulation path () that allows the refrigerant liquid retained in the evaporator () to circulate via a first heat exchanger (indoor heat exchanger ()); and a second circulation path () that allows the refrigerant liquid retained in the condenser () to circulate via a second heat exchanger (outdoor heat exchanger ()). A first switching means and a second switching means are provided on the first circulation path () and the second circulation path (). The first switching means and the second switching means are, for example, four-way valvesand

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Osaka, Japan

Bunki Kawano