Denso Corporation

Nippon Soken, Inc.

Makoto Ikegami

Hirotsugu Takeuchi

Haruyuki Nishijima

Hiroshi Oshitani

Etsuhisa Yamada

Naohisa Ishizaka

Yoshiaki Takano

Hisatsugu Matsunaga

Takuo Maehara

Yasushi Yamanaka

Naoki Yokoyama

Katsuya Kusano

Hideya Matsui

Takeyuki Sugiura

Kunio Iritani

Kenichi Fujiwara

Hiroshi Ishikawa

Hisayoshi Sakakibara

Yuichi Shirota

Yukikatsu Ozaki

Mika Gocho

Yasukazu Aikawa

Tatsuhiro Suzuki

Gouta Ogata

Takayuki Sugiura

Yukio Ogawa

Satoshi Nomura

Tooru Ikemoto

Takeharu Asaoka

Kazuhisa Makida

Hiroya Hasegawa

Toru Ikemoto

Yoshitaka Kume

An ejector-integrated heat exchanger includes multiple tube forming members. The tube forming member includes an ejector, a flow-out side refrigerant passage, and a suction side refrigerant passage. The ejector includes a nozzle portion decompressing a refrigerant, a refrigerant suction port, and a pressure increasing portion in which the refrigerant drawn from the refrigerant suction port and the refrigerant jetted from the nozzle portion are mixed, a pressure of the mixed refrigerant being increased in the pressure increasing portion. In the flow-out side refrigerant passage, the refrigerant flowing out of the pressure increasing portion performs heat exchange while flowing. In the suction side refrigerant passage, the refrigerant that is to be drawn through the refrigerant suction port performs heat exchange while flowing. Multiple tube forming members are arranged such that the refrigerant flows in parallel with each other.

Ejector-integrated heat exchanger

An ejector cycle system with a refrigerant cycle through which refrigerant flows includes an ejector disposed downstream of a radiator, a first evaporator that evaporates refrigerant flowing out of the ejector, a throttling unit located in a branch passage and depressurizes refrigerant to adjust a flow rate of refrigerant, and a second evaporator located downstream of the throttling unit. In the ejector cycle system, a flow ratio adjusting means adjusts a flow ratio between a first refrigerant flow amount depressurized and expanded in a nozzle portion of the ejector and a second refrigerant flow amount drawn into a refrigerant suction port of the ejector, based on a physical quantity related to at least one of a state of refrigerant in the refrigerant cycle, a temperature of a space to be cooled by the first and second evaporators, and an ambient temperature of the space.

Ejector cycle system

An expansion valve to expand high-pressure refrigerant and send the expanded refrigerant toward an evaporator is used in a refrigeration cycle, and includes a body portion, an element portion, and a valve portion. The body portion has a first passage through which the high-pressure refrigerant passes, a throttle passage located in the first passage so as to expand refrigerant, and a second passage through which refrigerant flowing out of the evaporator passes. The element portion arranged outside of the body portion has a pressure responding member to be displaced in accordance with a difference between an inner pressure of a seal space and a pressure of refrigerant flowing through the second passage. Temperature sensing media is filled in the seal space, and a pressure of the media is changed by temperature. The valve portion is displaced in accordance with the pressure responding member so as to control an opening of the throttle passage. Additive is filled in the seal space with the media so as to lower a condensing temperature of the media.

Expansion valve and method of producing the same

An ejector refrigerant cycle device includes a radiator for radiating heat of high-temperature and high-pressure refrigerant discharged from a compressor, a branch portion for branching a flow of refrigerant on a downstream side of the radiator into a first stream and a second stream, an ejector that includes a nozzle portion for decompressing and expending refrigerant of the first stream from the branch portion, a decompression portion for decompressing and expanding refrigerant of the second stream from the branch portion, and an evaporator for evaporating refrigerant on a downstream side of the decompression portion. The evaporator has a refrigerant outlet coupled to the refrigerant suction port of the ejector. Furthermore, a refrigerant radiating portion is provided for radiating heat of refrigerant while the decompression portion decompresses and expands refrigerant. For example, the refrigerant radiating portion is provided in an inner heat exchanger.

Ejector refrigerant cycle device

A subcool condenser having a condensation heat exchange portion, a receive portion and a supercool heat exchange portion is used as an outdoor heat exchanger that functions as a radiator in a cooling operation mode so that COP in the cooling operation mode is increased. In contrast, in a heating operation mode, a refrigerant bypass device that causes the refrigerant to flow so as to bypass the supercool heat exchange portion is provided so that pressure loss generated in the refrigerant flowing through the outdoor heat exchanger is decreased. Thereby, driving force of a compressor can be decreased and COP in the heating operation mode can be improved.

Refrigerant cycle device

In a refrigerant cycle device with an ejector, a branch portion is located at an upstream side of a nozzle portion of the ejector so that the refrigerant flowing out of an exterior heat exchanger is branched into first and second streams in a cooling operation mode. A passage switching portion is configured such that the refrigerant of the first stream flows through the nozzle portion of the ejector, and the refrigerant of the second stream flows through the decompression unit, the using-side heat exchanger, and the refrigerant suction port of the ejector, in the cooling operation mode. In contrast, the refrigerant discharged from the compressor flows into the nozzle portion after passing through the using-side heat exchanger, and the refrigerant flowing out of the exterior heat exchanger flows into the refrigerant suction port of the ejector, in the heating operation mode.

Refrigerant cycle device with ejector

An ejector cycle system with a refrigerant cycle through which refrigerant flows includes an ejector disposed downstream of a radiator, a first evaporator located to evaporate refrigerant flowing out of the ejector, a branch passage branched from a branch portion between the radiator and a nozzle portion of the ejector and coupled to a refrigerant suction port of the ejector, a throttling unit located in the branch passage, and a second evaporator located downstream of the throttling unit to evaporate refrigerant. In the ejector cycle system, a variable throttling device is located in a refrigerant passage between a refrigerant outlet of the radiator and the branch portion to decompress the refrigerant flowing out of the radiator.

In a refrigerant cycle device having an ejector, a branch portion for branching a flow of refrigerant flowing out of the ejector into at least a first refrigerant stream and a second refrigerant stream is located. A first evaporator for evaporating the refrigerant of the first refrigerant stream is located to allow the refrigerant to flow to a suction side of the compressor, and a second evaporator for evaporating the refrigerant of the second refrigerant stream is located to allow the refrigerant to flow to an upstream side of a refrigerant suction port of the ejector. In addition, the branch portion is located to maintain a dynamic pressure of the refrigerant flowing out of the ejector, and the second evaporator is connected to the branch portion in a range where the dynamic pressure can be applied to an inside of the second evaporator.

An ejector cycle device includes a compressor, a refrigerant radiator, an ejector having a nozzle part and a refrigerant suction port, and a branch passage for introducing refrigerant branched on an upstream side of the nozzle part of the ejector in a refrigerant flow into the refrigerant suction port. Furthermore, a first evaporator is arranged on a downstream side of the ejector in the refrigerant flow, and a second evaporator is arranged in the branch passage. In addition, in the ejector cycle device, a refrigerant flow rate ratio (&#x3b1;) of a flow rate of refrigerant flowing in the second evaporator to a flow rate of refrigerant discharged from the compressor is set within a range from 0.07 or more to 0.93 or less.

Ejector cycle device

A first evaporator connected to an outlet side of an ejector, a second evaporator connected to a refrigerant suction port of the ejector, a throttle mechanism arranged on an inlet side of a refrigerant flow of the second evaporator and for reducing the pressure of the refrigerant flow are provided. Furthermore, the ejector, the first evaporator, the second evaporator and the throttle mechanism are assembled integrally with each other to construct an integrated unit having one refrigerant inlet and one refrigerant outlet. Hence, mounting performance of an ejector type refrigeration cycle can be improved.

Unit for ejector type refrigeration cycle

An ejector cycle device includes an ejector having a nozzle portion which decompresses refrigerant flowing out of a radiator, a first evaporator for evaporating refrigerant from the ejector, and a second evaporator provided in a branch passage that is branched from a position between the refrigerant radiator and the ejector and is connected to a refrigerant suction port of the ejector. Furthermore, a throttle member is disposed in the branch passage to decompress refrigerant and adjust a flow amount of refrigerant, and the second evaporator is disposed in the branch passage between the throttle member and the refrigerant suction port. In the ejector cycle device having both the first and second evaporators, a defrosting operation of one the first and second evaporators can be performed while the other one of the first and second evaporators is operated to have a cooling function.

A branch passage, which is branched at a point on an upstream side of an ejector, is connected to a refrigerant suction inlet of the ejector. An evaporator is arranged in the branch passage, and a capillary tube is arranged on an upstream side of the evaporator.

Ejector refrigeration cycle

A first evaporator is arranged on a downstream side of an ejector, and a second evaporator is connected to a refrigerant suction inlet of the ejector. A refrigerant evaporation temperature of the second evaporator is lower than that of the first evaporator. The first and second evaporators are used to cool a common subject cooling space and are arranged one after the other in a flow direction of air to be cooled.

Vapor compression cycle having ejector

A first evaporator evaporates refrigerant, which is outputted from an ejector. A refrigerant outlet of the first evaporator is connected to a suction inlet of a compressor, which is connected to a radiator. A branched passage branches a flow of the refrigerant at a corresponding branching point located between the radiator and the ejector. The branched passage conducts the branched flow of the refrigerant to a suction inlet of the ejector. A flow rate control valve is arranged in the branched passage between a radiator and an ejector on a downstream side of the radiator to depressurize refrigerant outputted from the radiator. A second evaporator is arranged in the first branched passage.

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Anjo, Japan

Makoto Ikegami