Hitachi, Ltd.

Osaka Gas Company Limited

Toho Gas Co., Ltd.

Tomihisa Oouchi

Yoshifumi Kunugi

Toshio Hatada

Kyoji Kohno

Shigeo Sugimoto

Akira Nishiguchi

Kenzi Machizawa

Satoshi Miyake

Norihiro Itou

Yasushi Funaba

Michiyuki Uchimura

Kazumi Iwai

Junichi Kaneko

Hironobu Ueda

Tamio Shimizu

Tamio Fukuda

Sampei Usui

Sanpei Usui

Hironobu Kawamura

Sadatoshi Takemoto

Shinichi Kannoh

Yoshikazu Nagaoka

Shigekichi Kurosawa

Sigeo Sugimoto

An absorption water heater/chiller using lithium bromide as an absorbent and water as a refrigerant, and a high temperature regenerator therefor. The high temperature regenerator is provided with a combustion chamber defined by an inner tube ( ) on the side of a blowout port of a burner ( B), from which a combustion gas is blown out. A solution is received in a liquid chamber, which extends on upper and lower sides of the combustion chamber and is defined by an outer tube ( ). A refrigerant steam outflow passage ( ) is formed in an upper portion of the outer tube, and gas discharge passages ( ) are formed at an end portion of the combustion chamber opposed to the burner. A plurality of solution tubes ( ) providing communication between the liquid chamber portions on the upper and lower sides of the combustion chamber extend through the combustion chamber. The plurality of solution tubes are roughly divided into a group ( A) provided in flame of the burner, and a group ( B) provided away from the flame of the burner. The two groups are spaced from each other by 10-100 mm. Thus reduction of Nox is achieved and generation of CO is suppressed.

Absorption water heater/chiller and high temperature regenerator therefor

An absorption water heater/chiller using lithium bromide as an absorbent and water as a refrigerant, and a high temperature regenerator therefor. The high temperature regenerator is provided with a combustion chamber defined by an inner tube (,) on the side of a blowout port of a burner (,B), from which a combustion gas is blown out. A solution is received in a liquid chamber, which extends on upper and lower sides of the combustion chamber and is defined by an outer tube (,). A refrigerant steam outflow passage (,) is formed in an upper portion of the outer tube, and gas discharge passages (,) are formed at an end portion of the combustion chamber opposed to the burner. A plurality of solution tubes (,) providing communication between the liquid chamber portions on the upper and lower sides of the combustion chamber extend through the combustion chamber. The plurality of solution tubes are roughly divided into a group (,A) provided in flame of the burner, and a group (,B) provided away from the flame of the burner. The two groups are spaced from each other by 10-100 mm. Thus reduction of Nox is achieved and generation of CO is suppressed.

Louver segments of a heat transfer fin each have a longitudinal central portion disposed at the center of the louver segment in a direction crossing the flow of a fluid and longitudinal end portions each disposed on either side of the longitudinal central portion and sectioned into parts. Each louver segment has a configuration such that an area of the longitudinal central portion projected in the direction of the flow of the fluid is larger than an area of each of the longitudinal end portions projected in the direction of the flow of the fluid, with respect to the same width of the passage of the fluid.

Heat transfer fins and heat exchanger

A double effect air cooled absorption refrigerating machine consisting of fans provided on one side frame member out of the upper, lower and four side frame members which constitute a frame of a machine body, an air cooled heat exchanger provided on the remaining three side frame members and composed of an air cooled absorber and an air cooled condenser, and an evaporator, a high-temperature regenerator, a low-temperature regenerator, a solution heat exchanger and some other parts, all of which are provided on the inner side so as to be surrounded by the side frame members, the machine having a small installation area.

Double effect air cooled absorption refrigerating machine

The present invention relates to a louvered heat transfer fin in which the air-passing resistance of the louver is varied so as to increase the overall heat exchange quantity, and thereby to greatly enhance the heat transfer performance of the fin. The arrangement of each louver is such that the projection area in the vicinity of the longitudinal central portion of the louver projected in the direction in which air passes is larger than the projection area of each of the longitudinal end sides of the louver projected in the same direction.

Heat transfer fin

First path flow passage is formed so as to lead the absorbent solution in the heat exchanger (7; 107) or the receive pan (24; 118a) disposed below a first path absorption process into a cooling air upper stream side of the first path absorption process through a conduit (30). Subsequent path flow passage is formed so as to lead the absorbent solution in the receive pan (24; 120) disposed below a subsequent path absorption process into the cooling air upper stream side of same path absorption process. The absorbent solution flow amount of each vertical tubes group (10; 158) can be obtained larger irrespective of the absorbent solution circulation flow amount for the refrigeration cycle. The dry portions of the vertical tube (10; 158) caused due to the storage of the absorbent solution circulation flow amount can be prevented.

Air-cooled absorption heating and cooling system

A triple-stage absorption refrigeration system including three generators. Solution is supplied from absorber directly to each of the three generators in parallel with each other without flowing through any other generator, and cooling medium is made to flow firstly through the condenser and then through the absorber. Due to these features, corrosion of walls of the first generator in which temperature becomes highest can be inhibited.

Multi-stage absorption refrigeration system

A vapor generator for use in, for example, an absorption type water cooler or heater. The vapor generator having a burner section and a boiler section, the boiler section being constituted by an outer casing, an inner casing disposed in the outer casing, and a multiplicity of solution tubes attached in rows to the inner surfaces of wall of the inner casing so as to extend substantially vertically. The interior of the tubes is in communication with a space accommodating a medium to be heated and defined between the inner casing and outer casing. A multiplicity of fins are attached to the inner surfaces of walls of the inner casing in the area around the flame formed by the burner section so as to increase the rate of heat transfer to the medium in the above-mentioned space from the gas in the combustion chamber. The axis of each of the solution tubes in a second row is offset from the line which extends in parallel with the flow of gas from the midst of the gap between two adjacent solution pipes in a first row located upstream from the second row as viewed in the direction of flow of gas, so that overheating of the central portion of each solution tube in the second row is avoided advantageously.

Vapor generator

Growing community of inventors

Tsuchiura, Japan

Tomihisa Oouchi