Sanyo Electric Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Thermal Analysis Partners, Llc.

Sanyo Air-conditioning Corporation

Sanyo Air-conditioners Corporation

Masahisa Otake

Hiroshi Mukaiyama

Ichiro Kamimura

Koji Sato

Setsu Hasegawa

Hidetaka Sasaki

Ken Kawakubo

Kazuhiko Mihara

Satoshi Imai

Kunie Sekigami

Toshikazu Ishihara

Hiroyuki Itsuki

Kazuaki Shikichi

Takashi Sato

Yunho Hwang

Reinhard Radermacher

Norio Sawada

Hiroshi Sekiya

Osamu Kuwabara

Yoshiaki Kurosawa

Junji Matsue

Mitsuhiko Ishino

Hans Huff

Ryouichi Katohno

Izumi Okamoto

Akira Matsuzaki

An object of the present invention is to keep an appropriate amount of a refrigerant to be circulated through a refrigerant circuit and prevent an overload operation of compression means due to high pressure abnormality in a refrigerating apparatus which obtains a supercritical pressure on a high pressure side. The refrigerating apparatus which obtains the supercritical pressure on the high pressure side comprises a refrigerant amount regulation tank connected to the refrigerant circuit on the high pressure side via a communicating circuit; a communicating circuit which connects the upper part of this tank to a medium pressure region of the refrigerant circuit; a communicating circuit which connects the lower part of the tank to the medium pressure region of the refrigerant circuit; an electromotive expansion valve of the communicating circuit; an electromagnetic valve of the communicating circuit; an electromagnetic valve of the communicating circuit; and control means for controlling these valves to collect a refrigerant circulated through the refrigerant circuit in the tank and discharging the refrigerant to the refrigerant circuit.

Refrigerating apparatus

An object of the present invention is to keep an appropriate high pressure side pressure in a refrigerant circuit while reducing noises of an operation of a blower in a refrigerating apparatus which obtains a critical pressure on a high pressure side. The refrigerating apparatus in which the refrigerant circuit is constituted of a compressor, a gas cooler, a reducing element and an evaporator to obtain a supercritical pressure on the high pressure side includes a blower which air-cools the gas cooler and a control device which controls this blower. This control device controls a revolution speed of the blower based on an outdoor temperature and an evaporation temperature of a refrigerant in the evaporator.

A refrigerating apparatus including a first refrigeration cycle circuit having a first compressor, a first radiator, a supercooler, a first pressure-reducing device and an evaporator that are connected through a refrigerant pipe, a second refrigeration cycle circuit having a second compressor, a second radiator, a second pressure-reducing device and the supercooler that are connected through a refrigerant pipe, a refrigeration unit in which the first compressor and the first radiator are mounted, a showcase in which the first pressure-reducing device and the evaporator are mounted, a supercooling hot water supply device in which the second compressor, the second radiator, the second pressure-reducing device and the supercooler are mounted, and a hot-water stock device having a hot water supply tank that is connected to the second radiator of the supercooling hot water supply device through a second radiator.

A refrigerating apparatus including a control unit which starts the operation of the refrigerant compressor in response to an operation signal and which regulates the pressure reducing device so that the temperature of a refrigerant in the water heat exchanger becomes +80 &#xb0; C. or more and the temperature of the refrigerant in the evaporator becomes 0 &#xb0; C. or less. The control unit detects a state where a cold storage amount in the cold storage unit reaches a predetermined amount or more and another state where the control unit judges whether the hot water storage tank is full of the hot water, after the elapse of a predetermined time from the start of the operation of the refrigerant compressor, and it stops the operation of the refrigerant compressor when one of the states is satisfied.

An object is to provide a heating tank capable of highly efficiently heating a target to be heated and having high safety and reliability, and a hot water storage tank. The heating tank in which the target to be heated is stored and which heats the target to be heated by a circulated refrigerant of a heat pump, for example, the hot water storage tank which is heated by the circulated refrigerant of the heat pump to produce hot water in the tank includes a heat exchanger in which a wall surface of a tank main body is partially secured to peripheral edge portions and inner portions of two metal plates and in which non-secured portions swell to constitute a refrigerant passage closed except an inlet and an outlet. A thickness dimension of one metal plate is set to be larger than that of the other metal plate, and the one metal plate is arranged on the inner side of the other metal plate.

Heating tank and hot water storage tank

An object of the present invention is to provide a cooling heating device in which a suitable operation can be performed in harmony with fluctuations of cooling and heating loads to reduce energy consumption, and the cooling heating device includes an outdoor heat exchanger having one end connected to a refrigerant outlet-side pipe of a condenser via an expansion valve and having the other end connected to a suction-side pipe and a discharge-side pipe of a compressor and configured to perform heat exchange between a refrigerant and outside air; a changeover valve which executes control so as to pass the refrigerant discharged from the compressor through the condenser or the outdoor heat exchanger and supply the refrigerant from the outdoor heat exchanger to the compressor or supply the refrigerant from the evaporator to the compressor; and a control unit which controls the compressor, the expansion valve and the changeover valve based on a cooling operation signal in response to a cooling load of the cool target and a heating operation signal in response to a heating load of the heat target.

Cooling heating device

A multi-stage refrigeration system is provided. The refrigeration system includes a first compression element which produces a first compressed refrigerant stream. A mixer combines the first compressed refrigerant stream with an auxiliary refrigerant stream. A second compression element is coupled to the mixer and produces a second compressed refrigerant stream. A first heat exchanger receives the second compressed refrigerant stream and generates a cooled stream. A stream splitter receives the cooled stream and provides first and second output streams. A first expansion valve receives the first output stream and controls the flow of the first output stream and a second expansion valve receives the second output stream and controls the flow of the second output stream. A second heat exchanger generates the auxiliary refrigerant stream provided to the mixer. An evaporator is coupled to the first expansion valve and the first compression element to evaporate the first output stream and provide an evaporated stream to the first compression element.

Multi-stage refrigeration system including sub-cycle control characteristics

A refrigerating machine equipped with a compressor has an intermediate-pressure portion in which refrigerant having intermediate pressure higher than the pressure of the refrigerant at the suction side of the compressor and lower than the pressure of the refrigerant at the discharge side of the compressor is allowed to be introduced, and a heat exchange circuit formed between a heat-source side heat exchanger and a using side heat exchanger. The heat exchange circuit branches the refrigerant flowing from any one of the heat exchangers to the other heat exchanger, carries out heat exchange between one branched refrigerant and the other branched refrigerant or the refrigerant before the branching so that the one branched refrigerant is set to gas-phase refrigerant, and the gas-phase refrigerant thus achieved is led to any one of the intermediate-pressure portion and refrigerant suction pipe of the compressor.

Refrigerating machine

An object is to provide an air conditioner in which a desiccant air conditioner is combined with a refrigerating device to cool an indoor by a refrigeration cycle including a compressor and the like and in which a drop of energy efficiency is suppressed. An air conditionerincludes a desiccant air conditionerand a refrigerating devicewhich cools the indoor by a usual refrigeration cycle, this refrigerating devicehas an auxiliary heat exchangerbetween an outlet side of a heaterand an inlet side of an expansion valve, and this auxiliary heat exchangeris disposed externally from an exhaust air passageand a supply air passage

Air conditioner

In the case that heat absorbing means that function in selectively different temperature ranges, are provided in a refrigerating cycle, an object is to provide a refrigerating apparatus capable of suppressing the deterioration of efficiency in either temperature range to make a highly efficient operation possible. The refrigerating apparatus includes a compressor, a radiator, first heat absorbing means, and second heat absorbing means provided in parallel with the first heat absorbing means. The first heat absorbing means includes first decompressing means, a first heat absorber, and a first heat exchanger capable of heat exchange between a refrigerant which has come from the first heat absorber and a refrigerant flowing in the first decompressing means. The second heat absorbing means includes second decompressing means, a second heat absorber, and a second heat exchanger capable of heat exchange between a refrigerant which has come from the second heat absorber and a refrigerant flowing in the second decompressing means.

Refrigerating apparatus and refrigerator

In a refrigerant cycle apparatus which is operated at a supercritical pressure on a high-pressure side, for a purpose of maintaining or enhancing performances or reducing generation of clogging or a dimension of a capillary tube, a compressor has a first compression element, and a second compression element which compresses a refrigerant compressed by the first compression element, a gas phase refrigerant in an intermediate pressure receiver is sucked into the second compression element of the compressor, a liquid phase refrigerant in the intermediate pressure receiver is pressure reduced in a second pressure reducing device, and introduced into an evaporator, and the first pressure reducing device comprises a capillary tube on an upstream side of the refrigerant, and throttling means on a downstream side of the capillary tube.

Refrigerant cycle apparatus

In a refrigerating machine, a water cooling device having a cooling tower or an ice heat storage tank is provided as a heat exchanger for cooling refrigerant after heat-exchange in a heat-source side heat exchanger between an outdoor expansion valve and the heat-source side heat exchanger.

Heat exchange apparatus and refrigerating machine

A refrigerating machine equipped with a compressorhaving an intermediate-pressure portionM in which refrigerant having intermediate pressure higher than the pressure of the refrigerant at the suction side thereof and lower than the pressure of the refrigerant at the discharge side thereof can be introduced, and an intermediate-pressure receiverthat is inserted in a flow path between an expansion valve() of a heat source side heat exchanger() and an expansion valve() of a using side heat exchanger(), carries out gas-liquid separation on gas-liquid mixed refrigerant after the heat exchange in the heat source side heat exchanger or the using side heat exchanger, and then feeds gas-phase refrigerant to the intermediate-pressure portionM.

Refrigerating machine and intermediate-pressure receiver

Gas displacement volumes of a high temperature chamber and a middle temperature chamber in a high temperature portion of a hot gas machine are different. Alternatively, a gas displacement volume of a low temperature chamber and a middle temperature chamber in a low temperature portion are different.

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Gunma, Japan

Masahisa Otake