Abstract: In an air conditioning system for circulating a fluid which can change a phase between a gas phase and a liquid phase by a difference of a specific gravity between the gas phase and the liquid phase between an heat source side machine and a plurality of user side machines more than half of which are disposed below the heat source side machine, so that each of the user side machines performs a cooling operation, each of the user side machines is provided with a heat exchanger, a flow control valve for controlling a volume of said fluid supplied to the heat exchanger, a blow means for supplying an air-conditioned air to a room through the heat exchanger, a physical value detecting means for detecting a physical value relating to an air conditioning load such as a temperature and a signal controlling means for the operating and detecting portions, and wherein the heat source side machine is provided with a control means for communicating with said signal controlling means and outputting a control signal to said

Abstract: In an absorption system hot and cold water supply apparatus for simultaneously supplying hot water and cold water, there is provided a refrigerant blow device for blowing a refrigerant into a refrigerant circulation path, thermo-capacity control device for carring out heating control of a generator by a cold water temperature or a hot water temperature or a combination control of the heating control and a control of a refrigerant flow rate from the generator to and condenser, and control device for controlling the operation of the refrigerant blow device by a cold water exit temperature of an evaporator.

Abstract: A method of depositing a silicon dioxide film by bringing a substrate into contact with a hydrosilicofluoric acid solution supersaturated with silicon dioxide by the addition of an additive to deposit silicon dioxide film on the surface of the substrate, wherein the additive is at least one compound selected from the group consisting of an aluminum compound, a calcium compound, a magnesium compound, a barium compound, a nickel compound, a cobalt compound, a zinc compound, and a copper compound, and/or a metal or metals.

Abstract: A method for making a silicon dioxide coating on a surface of a substrate such as, for example, an alkali metal-containing glass sheet by dipping the substrate in a treatment liquid obtained by adding boric acid to an aqueous silicon dioxide-saturated solution of hydrosilicofluoric acid.