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    • 104. 发明专利
    • ABSORPTION WATER COLER-HEATER
    • JPH06137702A
    • 1994-05-20
    • JP29112292
    • 1992-10-29
    • HITACHI LTD
    • OUCHI TOMIHISANISHIGUCHI AKIRAKUNUGI TAKAFUMINAKAO TAKESHIMACHIZAWA KENJIKUSHIMA HIROSHI
    • F25B15/00
    • PURPOSE:To provide an absorption water cooler-heater in which liquid refrigerant of an evaporator can smoothly be transmitted to the solution side of an absorber by an air lift pump pipe regardless of heat input control carried out in accordance with heating load at the time of heating operation, thereby realizing a good heating cycle and a small temperature variation of hot water. CONSTITUTION:The title absorption water cooler-heater comprises a high temperature regenerator 1, a low temperature regenerator 2, a condenser 3, an evaporator 4, an absorber 5, a solution pump 8, a refrigerant pump 9, solution heat exchangers 6 and 7 and a piping system operationally connecting the above component devises to each other, a passage 26 for heating refrigerant vapor from the condenser 3 to the absorber 5 being of a U-shape so that the liquid refrigerant in the evaporator 4 is made to flow by the pump 9 at the time of cooling operation so as to form liquid seal and that the liquid refrigerant of the evaporator 4 is made to flow to the absorber 5 by the air lift pump for the refrigerant vapor at the time of heating operation. The water cooler-heater is further provided with a plurality of air lift pump pipes 24 (24a, 24b) and a throttled part 30 so that the vapor quantities flowing to the respective air lift pump pipes 24 are different from each other to thereby make the void fractions of the respective air lift pump pipes vary from one to another.
    • 106. 发明专利
    • AIR-COOLED ABSORPTION TYPE HEATING AND COOLING EQUIPMENT
    • JPH0391664A
    • 1991-04-17
    • JP22438189
    • 1989-09-01
    • HITACHI LTD
    • OUCHI TOMIHISANAKAO TAKESHIKUNUGI TAKAFUMI
    • F25B43/04
    • PURPOSE:To enable safety operation by laying out a plurality of heat velocity sensors along a refrigerant vapor current of an air-cooled heat exchanger and transmitting a noncondensable-gas-detection signal when a location in which the distribution of heat velocity drops abnormally is deticted. CONSTITUTION:A computing element is installed to calculate the differential velocity between a plurality of heat velocity sensors laid out along the refrigerant vapor current of an air cooled heat exchanger for at least either an aircooled absorber 5 or an air-cooled condenser 3 and the heat velocity of these heat velocity sensors. When a measured differential heat velocity is larger in the case an attempt is made to compare the differential heat velocity with the specified differential heat velocity, an noncondensible-gas-detection signal is transmitted. A local drop in the heat velocity on a heating surface induced by the presence of the noncondensible gas is detected by a plurality of heat velocity sensors in this manner. The actual heat velocity varies with the operating conditions, but a local drop in the heat velocity in the same absorber can be relatively grasped, thereby preventing the generation of operation error. It is, therefore, possible to perform safely operation.
    • 107. 发明专利
    • HEAT STORAGE DEVICE
    • JPS6454197A
    • 1989-03-01
    • JP21008587
    • 1987-08-26
    • HITACHI LTD
    • YANATORI MICHIOKUNUGI TAKAFUMIONODA TOSHISUKE
    • F28D20/00F24S90/00F28D20/02
    • PURPOSE:To facilitate the heat transfer of heat storage and heat release between fluid and heat storage material by causing the fluid to flow through the fluid once-through holes of a plurality of heat storage containers possessing latent heat material at the inner part and seed crystal at the inner part of a circumferential edge and also slit parts formed by spacers at the circumferential edqe part. CONSTITUTION:Plural sheets of heat storage containers 2 are piled up through spacers 6 and slit parts through which fluid flows are formed. At the containers 2 fluid once-through holes 9 are so placed that the location of the holes are shifted from the center to a circumferential edge side and seed crystal 8 is placed at the inner parts of the circumferential edge 7. The crystal 8 prevents supercooling at the time of heat release of latent heat storage material 3. After the fluid passes through a jacket 12 from an inlet part, it meanders in the slit parts 14 and is discharged from an outlet part after passing through a jacket 13. During this time, heat storage from the fluid to the material 3 or heat release from the material 3 to the fluid is carried out. Thereby, the crystallization of the heat storage material can be surely and rapidly carried out.