JPS5869358A - Storage capacity switching device for water tank - Google Patents

Abstract

PURPOSE:To obtain hot water of a constant high temperature by a method wherein a hole drilled in a tubular capacity variable adopter arranged in th water tank is opened and closed by the variation of the level of water in the water tank in response to the opening and closing of a valve communicating with the atmosphere so that the quantity of the water stored in the water tank is varied to correspond with the condition of insolation. CONSTITUTION:In case where a large quantity of water is to be stored in the water tank 2, the valve 16 in a circulation pipe 17 is opened so that the pressure in the water tank 2 becomes equal to the atmospheric pressure and water is supplied additionally into the tank 2 by lowering a ball tap 19 in proportion to the lowering of the level of the water in the tank 2 resulting from a supply of hot water. Thus the supplied water is stored in the tank 2 through a trap section 13 and a tubular section 14 of the capacity variable adopter 18 and when the level of the water in the tank 2 and that of the water in the adopter 18 reach the same predetermined level, further supply of water is stopped by the ball tap 19. On the other hand, in case where a small quantity of water is to be stored in the tank 2, the valve 16 is colsed and water is supplied into the tank 2 in the same manner as described above. In this case, the quantity of the water in the adopter 18 is kept increased to a level same as that of the water in the tank 2 until it reaches the hole 15 in the tubular section 14 and once the water has filled the hole 15 to make the interior of the adopter an airtight chamber, only the quantity of the water in the trap section 13 is increased to a predetermined level.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a capacity switching device that easily changes the capacity of a water storage tank. This is something that can be obtained.

Recently, with the spread of solar systems and solar water heaters, there is a need for something that is easier to use and that can collect heat at a higher temperature. The availability of hot water is a necessary condition, especially in the winter. Conventionally, in solar systems, the number of heat collectors was increased to increase the heat collection area in order to keep the water storage capacity of the water tank constant and raise the temperature of the hot water. In some cases, the area became so large that installation was impossible. In addition, in the case of a natural circulation type, in order to make the heat collector expandable, the water flow pattern of the heat collector becomes complicated, and the water head pressure in the hot water storage tank increases, causing the added heat collector to become extremely large. The selection of materials used was limited due to the applied force.The present invention is intended to solve the above-mentioned drawbacks, and the amount of water stored in the water tank is made variable. In other words, in the summer when the water supply temperature is high and sunlight conditions are good, the amount of water stored can be increased to obtain a large amount of hot water, and in the winter when the water supply temperature is low and the solar radiation conditions are poor, the amount of water stored can be increased. It is designed to be small so that hot water can be obtained while ensuring the amount of water outside the bathtub.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of a solar system using the capacity switching installation of the present invention. 1 is a heat collector, 2 is a heat storage tank (water storage tank), 3 is an outgoing pipe into which a circulation pump 4 is inserted, and 5 is a return pipe. The hot water in the tank 2 is transferred from the outgoing pipe 3 to the heat collector 1 to the return pipe 5.
→It is circulated and heated in the circuit of the tank 2 and sent to the hot water supply lower via the hot water supply piping 6. 8 is a differential temperature thermometer, and if the difference between the hot water temperature in the tank 2 and the hot water temperature in the heat collector 1 is above a certain value, the pump 4 is activated.
to drive. 9 is a water supply pipe temporarily installed at the top of the tank 2, and 10 is an overflow hole 11 at the top of the tank 2 opposite to the water supply pipe 9.
There is an overflow pipe provided through the pipe.

Reference numeral 12 denotes a capacity switching device of the present invention, which is installed inside the water tank 2 as shown in FIG. A cylindrical part 14 opened at the cylindrical part 14, a hole 15 provided in the middle of this cylindrical part 14, and a communication pipe 17 provided above the cylindrical part 14 and communicating only with the outside of the tank 2 via a valve 16. It consists of an integrally molded variable capacity adapter 18 and a pole tap 19 that opens and closes the water supply pipe 9 so as to keep the water level in the U-shaped trap part 13 constant, and all the water supplied from the water supply pipe 9 is transferred to the trap part. Water is supplied to 13.

Next, the operation of the capacity switching device of the present invention will be explained.

First, in the case of storing a large amount of water (for example, 2301), as shown in FIG. 2, the valve 16 of the communication pipe 17 is opened to bring the inside of the tank 2 to atmospheric pressure. When the water level decreases due to hot water supply, the pole tap 19 also decreases, so water is automatically supplied. Therefore, if water is supplied in this state, water will flow to the trap part 13 and the cylindrical part 14.
The water level in the tank 2 and the adapter 18 rise at the same level, and when the water level in the trap part 13 reaches a specified level, the water supply is stopped by the pole tap 19. At this time, the water levels in the adapter 18 and the tank 2 are at the same level, allowing a large amount of water to be stored.

Next, in the case of storing a small amount of water (for example, 180 tons), the valve 16 of the communication pipe 17 is closed as shown in FIG.

Water is automatically supplied by the pole tap 19 as the water level decreases due to hot water supply. In this case, air in the adapter 18 flows into the tank through the hole 15 in the cylindrical part 14, so the water levels in the adapter 18 and the tank 2 rise at the same level. However, if the water level rises to hole 15, water will flow to hole 1.
By closing 5, the air within the adapter 18 loses its flow path, forming an airtight chamber A, and the air pressure inside the airtight chamber A rises.

Therefore, the water level in the tank 2 does not rise above the position of the hole I5, only the water level in the trap part 13 rises, and when the water level in the trap part 13 reaches the specified level, the water supply is stopped by the pole tap 19, and the small capacity Water can be stored.

That is, this capacity switching device can easily switch the water storage capacity by opening and closing the valve 16 of the communication pipe 17. Also, all the supplied water is transferred to the tank 2 via the adapter 18.
Since the water is supplied downward, this capacity switching device also functions as a water distribution pipe, and the hot water above the reservoir does not mix with the cold water supplied, so hot water can always be supplied at a high temperature. Further, since only the inside of the communication pipe 17 provided with the valve 16 requires airtightness in order to switch the capacity, sealing inside the tank 2 is easy.

As described above, according to the present invention, the capacity of the water storage tank can be changed by the simple operation of opening and closing the valve, so when used as a heat storage tank in a solar heat collection system, for example, solar radiation can be achieved without changing the heat collection area of the heat collection part. By changing the amount of water stored depending on the situation, you can always store hot water at high temperatures.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a solar system using the capacity switching device of the present invention, FIG. 2 is an explanatory diagram of a solar system with a large capacity, and FIG. 3 is an explanatory diagram of a solar system with a small capacity. sign

Claims (1)

[Scope of Claims] 1. A capacity switching device for a water tank installed in a water tank, comprising: a U-shaped trap part; and a cylindrical part continuous with the trap part and having a lower end open at the bottom of the water tank. and a variable capacity adapter consisting of a hole formed in the middle of the cylindrical part and a communication pipe that communicates with the outside of the tank through a valve above the cylindrical part, and a variable capacity adapter that keeps the water level in the trap part constant. A water storage tank capacity switching device consisting of a water level control device.