Mitsubishi Electric Corporation

Kabushiki Kaisha Toshiba

Toshiba Materials Co., Ltd.

Mitsubishi Denki Kabushiki Kaisha

Masaki Toyoshima

Mamoru Hamada

Hayato Horie

Fumitake Unezaki

Shinichi Ito

Osamu Morimoto

Yasutaka Ochiai

Makoto Saito

Tsutomu Ishii

Ryo Sakai

Yasuhiro Shirakawa

Naoki Tanaka

Hajime Takeuchi

Yasumasa Ooya

Hitoshi Iijima

Toshihide Koda

Katsutoshi Nakagawa

Yoshitaka Adachi

Akio Nakagawa

Ichiro Omura

Yusuke Kawaguchi

Shinichi Wakamoto

Masahiro Sugihara

Tatsuya Yamada

Kazuo Shimokawa

Kenichi Matsushita

Noriaki Yoshikawa

Susumu Yoshimura

Yasuhito Saito

Koji Yamashita

Takashi Okazaki

Toshiaki Yoshikawa

Hidemoto Arai

Akira Morikawa

Hiroshi Nakata

Kazuki Ikeda

Akihisa Saito

Eiji Oyaizu

Kazumitsu Morimoto

Mihoko Shimoji

Yumi Ito

Yoshiki Endo

Takashi Koyanagawa

Kouji Yamashita

Osamu Usuda

Hiroshi Takei

Morio Takahashi

Masahiro Urase

Masako Ooishi

Taiki Miura

Tomohiro Kawano

Reiji Morioka

Sota Komae

Tsuyoshi Kubota

Haruki Arai

Emi Takeda

Kousuke Tanaka

Takeshi Izawa

Takashi Rokutanda

Takuya Furuhashi

Noriaki Katsumata

Masami Yasuda

Hiroki Aoki

Atsushi Shinno

Yumi Kanno

Yunqing Fan

Fumihiko Sone

Yoshitsugu Inaba

Haruyuki Hirasawa

Junichi Okazaki

Shouji Miyashita

A storage water heater is provided that allows for improved maintenance of hygiene in a lower part of a hot-water storage tank and in a passage connected to the lower part of the hot-water storage tank. A storage water heater includes a heating device, a hot-water storage tank, a first passage, and a controller. The hot-water storage tank stores hot water. The first passage is connected to a lower part of the hot-water storage tank. The controller is configured to selectively switch between a heat-up operation and a recirculation operation. In the heat-up operation, hot water heated by the heating device is delivered to an upper part of the hot-water storage tank. In the recirculation operation, hot water flowing out from the upper part of the hot-water storage tank is delivered to the lower part of the hot-water storage tank via the first passage.

Storage water heater

The indoor unit has an air passage formed therein to allow the indoor air drawn in the indoor unit to pass therethrough. The first indoor heat exchanger, the adsorption and desorption device, and the second indoor heat exchanger are arranged in the air passage. The second indoor heat exchanger is disposed downstream of the first indoor heat exchanger, and the adsorption and desorption device is disposed downstream of the first indoor heat exchanger and upstream of the second indoor heat exchanger. To perform dehumidifying control, the controller controls the opening degree of the first expansion valve and the second expansion valve to enable switching between cooling adsorption mode where the adsorption and desorption device adsorbs moisture in the indoor air and cooling desorption mode where the adsorption and desorption device desorbs the adsorbed moisture.

Air-conditioning apparatus

An air-conditioning system includes a heat source unit, an air conditioner connected via piping to the heat source unit and configured to perform heat exchange between water supplied by the heat source unit and indoor air, a water circulation device for circulating the water between the heat source unit and the air conditioner, and an air-conditioning control device. The air-conditioning control device controls the heat source unit to lower temperature of the water flowing into the air conditioner, in accordance with an increase in an indoor humidity, and controls the water circulation device to lower temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor temperature.

Air conditioner system, air conditioner control device, air conditioner method, and program for control using water circulation and based on indoor latent and sensible heat loads

In an air conditioning system, a cooling tower cools cooling water. A chiller generates cold water using the cooling water cooled by the cooling tower. A cooling water circulation passage circulates cooling water between the cooling tower and chiller. A first heat exchanger exchanges heat between air and the cold water generated by the chiller. A cold water circulation passage circulates the cold water between the chiller and first heat exchanger. A second heat exchanger exchanges heat between a portion of the cooling water cooled by the cooling tower and air heat-exchanged with the cold water. A cooling water branch passage, branching from the cooling water circulation passage, introduces to the second heat exchanger the portion of the cooling water introduced to the chiller from the cooling tower, and introduces to the cooling water circulation passage the portion of the cooling water heat-exchanged with air by the second heat exchanger.

Water cooled-type air conditioning system

A ventilator includes an exhaust air duct for exhausting air from an interior space to an outside and a supply air duct for supplying air from the outside to the interior space, and is equipped with a heat exchanger and a defroster. The heat exchanger performs heat exchange between air passing through the exhaust air duct and air passing through the supply air duct. The defroster defrosts, when frost attaches to the heat exchanger, the heat exchanger by, after air flows into the exhaust air duct or the supply air duct, changing a state of the air.

Ventilator, and defrosting method

A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/lm or less.

White LED lamp, backlight, light emitting device, display device and illumination device

An air conditioning system includes: an air conditioning device, a ventilator, a sensor group, an operation terminal, and a control device installed in a building. The control device performs controlling and monitoring of operation of the air conditioning device and the ventilator. The control device controls the ventilator so as to operate during the maintenance operation of the air conditioning device.

Air-conditioning system, controller, and program

A refrigeration cycle apparatus includes a refrigerant circuit that includes a condenser, multiple temperature sensors that are disposed in line in a direction in which refrigerant flows in the condenser and detect refrigerant temperature of the condenser, a memory unit that stores positional information of the multiple temperature sensors, and a refrigerant amount calculation unit that calculates a refrigerant amount of the condenser based on the positional information of the multiple temperature sensors, detected temperatures of the multiple temperature sensors and a saturated liquid temperature of the refrigerant.

Refrigeration cycle apparatus determining refrigerant condenser amount

A refrigeration cycle apparatus is provided with a compressor, a condenser, a pressure-reducing device, and an evaporator. The refrigeration cycle apparatus comprises a refrigeration cycle configured to circulate refrigerant; and a control unit configured to control the refrigeration cycle. The control unit causes the refrigeration cycle to operate when an operation condition is satisfied, the operation condition including elapse of a preset time after the control unit stops the refrigeration cycle. The control unit detects abnormality of the refrigeration cycle based on state data indicating a state of the refrigeration cycle after the control unit causes the refrigeration cycle to operate.

Refrigeration cycle apparatus and refrigeration cycle apparatus abnormality detecting system

An air conditioning system includes a compressor to compress refrigerant; a first heat exchanger to condense the compressed refrigerant into a supercooled liquid state; a first decompressor to decompress the condensed refrigerant; a second heat exchanger to cause the decompressed refrigerant to absorb heat; a second decompressor to decompress the heated refrigerant; a third heat exchanger to evaporate the decompressed refrigerant; and a blower fan to take in air from outside a room and blow the air to the first heat exchanger. The second heat exchanger is disposed downstream of the first heat exchanger in a blowing direction of the blower fan. A humidifier is disposed between the first heat exchanger and the second heat exchanger in the blowing direction. The air blown from the blower fan is heated by the first heat exchanger, humidified by the humidifier, cooled by the second heat exchanger, and supplied into the room.

Air conditioning system

An outside-air processing device includes a main body having a return-air introducing port for introducing return air from a room and a supply-air outlet port for blowing out supply air into the room, a total heat exchanger arranged in the main body and configured to exchange heat between outdoor air and the return air, and to blow out the heat-exchanged outdoor air from the supply-air outlet port as the supply air, and an opening-closing unit configured to open and close a bypass path formed in the main body to bypass between the return-air introducing port and the supply-air outlet port.

Outside-air processing device and air-conditioning apparatus

An air-conditioning apparatus includes an outside-air processing device including a total heat exchanger exchanging heat between outdoor air and return air, and blowing out the outdoor air from a supply-air outlet port into a room as supply air, an indoor unit including an indoor heat exchanger exchanging heat between the return air and refrigerant, and blowing out the return air from an indoor outlet port as indoor outlet air, a joining unit connecting the supply-air outlet port and the indoor outlet port to join the supply air and the indoor outlet air, an opening-closing unit arranged in the joining unit and opening and closing the joining unit, a supply-air temperature detecting unit detecting a supply-air temperature of the supply air, an indoor outlet temperature detecting unit detecting an indoor outlet temperature of the indoor outlet air, and a control unit controlling an operation of the opening-closing unit based on the supply-air temperature and the indoor outlet temperature.

Air-conditioning apparatus and air-conditioning system

A refrigerant circuit forming a refrigeration cycle by connecting together a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger via a refrigerant pipe; and a control unit controlling a blown-out air temperature by causing the indoor heat exchanger to exchange heat while controlling the refrigeration cycle based on one of a sensible heat capability and a latent heat capability calculated from a cooling capability of the refrigerant circuit and a cooling load of the refrigerant circuit. The control unit includes: a capability judging unit judging the cooling capability of the refrigerant circuit based on the one of the sensible heat capability and the latent heat capability; and a control selecting unit selecting one from between superheat degree control to control a degree of superheat and evaporating temperature control to control an evaporating temperature, based on a determination result obtained by the capability judging unit.

Air-conditioning apparatus and air-conditioning system that selects control based on sensible or latent heat cooling capability

An air conditioning system according to the present invention changes a target supply temperature based on a magnitude relationship between an operating frequency of a first compressor and a first frequency at which an operating efficiency of the first compressor reaches a maximum, and a magnitude relationship between an operating frequency of a second compressor and a second frequency at which an operating efficiency of the second compressor reaches a maximum.

Air conditioning system with indoor and ventilation circuits

Provided is a refrigeration cycle apparatus including: a refrigerant circuit formed by connecting, by a refrigerant pipe, a compressor, a condenser, an expansion device, an evaporator and a liquid reservoir; a liquid level detection sensor including a plurality of heat generating units and a plurality of temperature detection units, the heat generating units being paired with the temperature detection units, and provided in the liquid reservoir, the liquid level detection sensor being configured to detect a liquid level of a refrigerant accumulated in the liquid reservoir, based on a temperature of each of the heat generating units, in which the liquid reservoir includes a container for accumulating the refrigerant, an inlet pipe connected to the refrigerant circuit and configured to allow a portion of the refrigerant flowing out of the container to flow into the container, and in which in the container, a shielding portion is provided between an discharge outlet for the refrigerant of the inlet pipe and the liquid level detection sensor, to prevent the portion of the refrigerant flowing out of the discharge outlet from directly coming into contact with the liquid level detection sensor.

Refrigeration cycle apparatus and liquid level detection sensor

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Tokyo, Japan

Masaki Toyoshima