JPH0417331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a cooling system, and more specifically to a cooling system that cools and dehumidifies each floor of a building.

<<Prior Art>> Heat storage methods used in air conditioning systems for cooling and dehumidifying each floor of a building can be broadly classified into water heat storage methods and ice heat storage methods. The water thermal storage method generates and stores cold water at night, and circulates and supplies it to each floor of the building when it is needed during the day. On the other hand, the ice storage method generates ice at night and stores it, then thaws the ice during daytime demand and circulates the resulting cold water to each floor of the building. There are two types of ice heat storage methods: solid ice and liquid ice, and they differ in the way they generate ice.The former generates ice blocks by gradually growing ice on the outer surface of a coil through which refrigerant passes. In the latter, a mixture of antifreeze and water is dripped into an evaporator that circulates refrigerant to produce liquid ice, which is a mixture of water and fine ice blocks.

≪Problems to be solved by the invention≫ When comparing the water heat storage method with the ice heat storage method described above, the water heat storage method is cheaper but requires a larger installation space, so ice is the preferred cooling method for urban areas. It can be said that the heat storage method has greater advantages.

However, in the conventional ice heat storage method, the method of ice generation differs between the solid ice method and the liquid ice method, but in both cases, the cold water obtained by melting the ice was circulated through each floor of the building. When cold water is passed through a radiator such as a fan coil unit on each floor, the temperature of the cold water rises in a relatively short period of time, and although it can lower the room temperature, its dehumidification capacity is small, and therefore it cannot keep each floor of the building in a sufficiently comfortable condition. I couldn't maintain it.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a cooling system with large cooling and dehumidifying capabilities using an ice heat storage system.

≪Means for Solving the Problems≫ In order to achieve the above object, in the present invention, a mixture of water and antifreeze is brought into contact with an evaporator in a heat storage method employed in an air-conditioning system that cools and dehumidifies each floor of a building. A liquid ice generator is used to generate liquid ice, which is a mixture of water and small ice blocks.The liquid ice is temporarily stored in a heat storage tank, and the liquid ice in the heat storage tank is distributed to each floor of the building using a general-purpose water transfer pump. The water is circulated in a heat radiator such as a fan coil unit, and the water returned from the heat radiator to the lid heat tank is circulated to the liquid ice generator.

<<Operation>> The liquid ice generator generates liquid ice which is a mixture of ice and fine ice blocks, and this liquid ice is temporarily stored in the heat storage tank. Then, when there is demand during the daytime, the liquid ice is circulated directly into radiators such as fan coil units on each floor of the building using a general-purpose water transfer pump without clogging the pipes, cooling and dehumidifying each floor of the building. . Also,
The water that melts the liquid ice, which rises at room temperature on each floor of the building and returns to the heat storage tank, is circulated to the liquid ice generator to generate liquid ice again.

<<Example>> Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 respectively show a cooling system for cooling and dehumidifying each floor of a building according to the present invention. In this system, a liquid ice ice maker 2 that generates liquid ice 1 that is a mixture of water and fine ice blocks;
The liquid ice heat storage tank 3 that stores the liquid ice 1 is communicated with a water pipe 5 connected to the lower part of the heat storage tank 3 via a first water transfer pump 4, and is integrated into a unit as a whole in a corner of the roof of the building. It is located in

This unitized liquid ice ice maker 2
The liquid ice heat storage tank 3 is composed of a compressor 20, a condenser 21, a pressure regulating valve 22, and an evaporator 23, and a closed loop formed by these constitutes a refrigeration cycle.

The evaporator 23 uses an evaporator substrate 24 whose installation angles α and β can be tilted with respect to the vertical axis 19, and whose ice making amount can be varied in accordance with the inclination angle. , by circulating a refrigerant such as fluorocarbon, and utilizing the heat absorption caused by the phase change of this refrigerant, water droplets are sprinkled in a shower shape from the water sprinkler 26 above the evaporator board 24 using the ice-melting water 25 in the heat storage tank 3. is brought into contact with the evaporator substrate 24, thereby causing water droplets to solidify and grow to form ice blocks 27. At this time, some of the water droplets are not solidified and become water droplets 28 in the form of unfrozen blocks.

Hydrophobic coating films 29 are formed on both surfaces of these evaporator substrates 24, and their water-repellent action prevents ice blocks from adhering to the surfaces of the evaporator substrates.

In addition, in this cooling system, a radiator 6, 6, etc. such as a fan coil unit is installed on each floor of the building, and a liquid ice supply pipe 9 and a water return pipe are connected via a heat storage tank 3 and a second general-purpose water transfer pump 7. 8 and are arranged in communication. A dehumidifying drain pipe 10 is attached to the heat radiators 6, 6, etc. of these fan coil units, etc., for discharging water droplets due to dehumidification to the outside.
The piping system of the feed pipe 9 and the return pipe 8 is of a closed type to prevent corrosion inside the pipes. The liquid ice 1 generated using nighttime electricity is temporarily stored in a heat storage tank 3, and when it is needed during the day, it is sent to a radiator 6, such as a fan coil unit, on each floor of a building via a second general-purpose water transfer pump 7. 6... is circulated through the liquid ice supply pipe 9 to cool and dehumidify each floor. In addition, the water melted by the high humidity air on each floor is returned to the heat storage tank 3 via the return pipe 8, and when liquid ice is produced again at night, it is returned to the liquid ice ice maker 2 via the first water transfer pump 4 via the water pipe 5. will be done.

<<Effects>> As described above, in the cooling system according to the present invention, liquid ice is circulated through the radiators such as fan coil units on each floor of the building using a general-purpose water transfer pump.
The structure uses small ice blocks to directly cool and dehumidify the air on each floor without causing clogging in the pipes, so the equipment occupies a small area and the pipe diameter is small, resulting in lower equipment costs and higher cooling and dehumidifying capacity than before. This is a significant improvement, and can provide a uniform and sufficient cooling and dehumidifying environment on each floor of medium- and high-rise buildings. Furthermore, in areas where summers are particularly hot and humid, reducing indoor humidity can provide comfort without lowering the room temperature that much.
Economical cooling is provided.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the cooling system according to the present invention;
The figure is a diagram showing an example of a liquid ice ice maker and a liquid ice heat storage tank used in the cooling system of the present invention. 1...Liquid ice, 2...Liquid ice ice maker, 3...Liquid ice heat storage tank, 4...First water transfer pump, 6...Radiator such as fan coil unit, 7...Second water transfer pump.

Claims (1)

[Claims] 1. In the heat storage method used in the cooling system that cools and dehumidifies each floor of a building, a liquid ice generator that brings a mixture of water and antifreeze into contact with an evaporator is used to generate liquid ice that is a mixture of water and small ice cubes. Then, the liquid ice is temporarily stored in a heat storage tank, and the liquid ice in the heat storage tank is circulated into a heat radiator such as a fan coil unit on each floor of the building using a general-purpose water transfer pump, and from the heat radiator to the heat storage tank. A cooling system characterized in that returned water is circulated to the liquid ice generator.