Hitachi, Ltd.

Hiroaki Matsushima

Sachio Sekiya

Kazuhiro Endoh

Kensaku Oguni

Tadashi Osaka

Kazumoto Urata

Kazuya Matsuo

Hiroshi Iwata

Yuki Akiyama

Masaaki Itoh

Riichi Uchida

Hiroshi Kogure

Mari Uchida

Masayuki Nonaka

Kyuhei Ishibane

Takeshi Endoh

Hiroki Yoshikawa

Toshihiko Fukushima

Akira Nishiguchi

Tatsuo Fujii

Hiroshi Kusumoto

Sunao Funakoshi

Daisuke Hisajima

Yuto Imanishi

Mitsutaka Shizuya

Hiroo Nakamura

Chie Kobayashi

Akio Sakazume

Takatoshi Yamamoto

Katsuhiko Hashimoto

Tomomi Umeda

Hirotsugu Kuroume

Mituo Kudoh

Syoji Takaku

Toshiaki Inuma

Yusuke Kiritoshi

A vehicular air conditioning system for saving energy includes: a first indoor cooling heat exchanger for suctioning in and cooling the air within or outside a vehicle; an indoor air conditioning heat exchanger installed on the downstream cooling heat exchanger for regulating the temperature of the applicable air, a refrigeration cycle connected to the applicable indoor air conditioning heat exchanger, a heating element mounted in the vehicle, and a circuit for the machine coolant circulating between the applicable heating element and the applicable first indoor cooling heat exchanger, and in which the air flow path for air flowing into the indoor air conditioning heat exchanger is structured by merging a flow path passing through the first indoor cooling heat exchanger to a flow path not passing through the first indoor cooling heat exchanger, and is also configured to allow switching to either of the two flow paths.

Vehicular air conditioning system

A vehicular air-conditioning system includes: a vehicle interior air-conditioning apparatus which includes a device cooling circuit of a heat generating device mounted in a vehicle, and a refrigeration cycle circuit; and an intermediate heat exchanger for heat exchange between a device cooling medium of the device cooling circuit and an air-conditioning cooling medium of the refrigeration cycle circuit. A vehicle control apparatus is configured to determine a temperature of the cooling medium, and select a shorter control cycle timing of the vehicular air-conditioning system when the temperature of the cooling medium is greater than a predetermined temperature.

Vehicular air-conditioning system including a temperature-dependent control cycle

A vehicular air conditioning system capable of suppressing the power consumption of a refrigerating cycle is disclosed. The vehicular air conditioning system comprises a refrigerating cycle circuit comprising a compressor, an outside heat exchanger and an inside air conditioning heat exchanger annularly connected in order, and a device cooling circuit comprising a heating unit, an inside cooling heat exchanger, an intermediate heat exchanger and a pump being annularly connected, the intermediate heat exchanger being constructed such that one end of a piping of the cooling medium for air conditioning is connected to a liquid piping, the liquid piping providing connection between the outside heat exchanger and the inside air conditioning heat exchanger, and an opposite end of the piping of the cooling medium for air conditioning is connected to a suction port of the compressor.

A transport container comprising a spherical containerand a heat accumulating materialdisposed inside of the spherical container, wherein; the heat accumulating materialis provided with a space for holding a transported object therein, and the space is formed at the central part of the inside of the spherical container

Transport container, transporting method for the same, and constant temperature transport container

An isothermal transportation container comprises an insulating container and a lid that can seal this insulating container. The insulating container has a plurality of insulating materials arranged overlapped on the inner peripheral face of the insulating container. A thermal conductive member is arranged in a space of the insulating container formed by the insulating materials. The thermal conductive member can accommodate a plurality of laminated packaging containers, each of which accommodates a thermal storage medium and a transported article. The heat in the thermal storage medium in one packaging container can be transmitted to the other packaging container through the thermal conductive member.

Isothermal transportation container

In a refrigerator, an intermediate heat exchanger as an evaporator in the refrigeration cycle 11 in which a flammable refrigerant is sealed is provided inside of a heat insulating material. A heat transferring device is provided between the intermediate heat exchanger and a heat exchanger for cooling. At the time of stop and occurrence of the refrigerant leakage, the refrigerant inside of the intermediate heat exchanger is recovered into the condenser or into the refrigerant recovery cylinder so that even if the refrigerant leaks out, a leaked amount of the refrigerant into the refrigerator is reduced.

Refrigerator and condenser

A refrigeration cycle comprises a compressor, an indoor heat exchange, an outdoor heat exchanger, a liquid receiver; and a pressure reducer connected in series to form a closed loop. The liquid receiver and the pressure reducer connected in series are connected between the indoor heat exchanger and said outdoor heat exchanger. A non-azeotropic mixture refrigerant comprising at least two kinds of refrigerant of different boiling temperatures mixed together is charged in and circulated through the refrigeration cycle. The mixing ratio of the azeotropic mixture refrigerant circulated thorough the refrigeration cycle is controlled substantially constant.

Refrigeration cycle and method of controlling the same

A refrigeration cycle comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a liquid receiver; and a pressure reducer connected in series to form a closed loop. The liquid receiver and the pressure reducer connected in series are connected between the indoor heat exchanger and said outdoor heat exchanger. A non-azeotropic mixture refrigerant comprising at least two kinds of refrigerant of different boiling temperatures mixed together is charged in and circulated through the refrigeration cycle. The mixing ratio of the azeotropic mixture refrigerant circulated thorough the refrigeration cycle is controlled substantially constant.

An air-conditioner of a heat pump type includes a refrigeration cycle including an interior heat exchanger, an exterior heat exchanger, a compressor, a four-way valve, and an expansion mechanism, and a non-azeotrope refrigerant composed of not less than two kinds of refrigerants is used as a working medium. A refrigerant path in each of the interior and exterior heat exchangers is divided into a group of first refrigerant passages located at a region where a proportion of the liquid-phase refrigerant is large and a group of second refrigerant passages located at a region where a proportion of the liquid-phase refrigerant is small. At least part of the group of first refrigerant passages of each of the interior and exterior heat exchangers is located at the windward side. Heat transfer tubes of the group of first refrigerant passages of each of the interior and exterior heat exchangers are smaller in flow-passage cross-sectional area than those of the corresponding group of second refrigerant passages.

Air-conditioner employing non-azeotrope refrigerant

The composition of a refrigerant in a refrigeration cycle is detected, so that the refrigeration cycle is controlled by a control method in accordance with the detected composition. A control target value is set in accordance with the detected composition, and when the composition is varied, the control target is changed in accordance with that variation. As a result, even when the refrigerant composition is varied, the refrigeration cycle can be operated stably. The refrigeration cycle uses a non-azeotrope refrigerant, and includes a device for detecting the composition of a non-azeotrope refrigerant; a device for detecting the operating state of the refrigeration cycle, i.e., status values to be controlled, such as temperature or pressure; a computation control apparatus for accepting composition, temperature, pressure or the like, detected by the detecting device as inputs and for performing signal conversion, computation control for control targets, or the like; and a drive apparatus for driving the components of the refrigeration cycle, such as a compressor or a refrigerant pressure reduction apparatus.

Refrigeration cycle

Disclosed is an air conditioner and, in particular, an air conditioner which is capable of blowing out warm air in heating mode. In the air conditioner of this invention, the condenser is thermally separated into an air-upstream-side and an air-downstream-side heat exchanger, and the heat exchange capacity of the air-downstream-side heat exchanger is adjusted, so that, under preset operating conditions, the entire refrigerant in the air-downstream-side heat exchanger can be kept in the superheated-gas phase, thus making it possible to blow out warm air having a temperature higher than the condensation temperature. Further, the refrigerant temperature at the outlet of the air-downstream-side heat exchanger is measured by a temperature sensor, and the revolving speed of the compressor, the revolving speed of the fan, etc., is so controlled that the temperature measured is kept at a level higher than the condensation temperature. Thus, under all operating conditions, the entire refrigerant in the air-downstream-side heat exchanger can be kept in the superheated gas phase, thereby making it possible to blow out warm air having a temperature higher than the condensation temperature.

Air conditioner and heat exchanger used therein

The present invention relates to air conditioning systems and more particularly to an air conditioning system which provides air conditioning in each of a plurality of spaces. The air conditioning system according to the present invention divides a space with partitions into a plurality of air conditioning spaces and controls the temperature by cooling and heating mediums supplied from an external heat source using a three-way valve and an expansion valve. The air conditioning system includes an ID card for identifying a person which uses the air conditioning system. If a person is present to use the air conditioning system, the set or measured values of the environmental conditions for that person is stored. When that person again uses the air conditioning system, the system calculates the environmental conditions stored by the person in accordance with his stored set or measured environmental condition values. Each of the individuals' preferred comfortable environments is automatically realized by calculating the set values for that person in accordance with his current or past set conditions independent of the space. Changes to his preference to the environmental conditions are easily made.

Air conditioning system

A control system for a compressor motor used with an air conditioning unit is disclosed. A current for generating a non-rotating magnetic field is supplied to the compressor motor to preheat a compressor. A current for generating a rotating magnetic field is also supplied to the compressor motor together with the current for generating a non-rotating magnetic field to heat the compressor. The heat pump using this control system is thus capable of transmitting sufficient heat energy immediately after start of the operation of the heat pump.

Growing community of inventors

Ryugasaki, Japan

Hiroaki Matsushima