JP2005054520A - Domestic treated water supply system utilizing rainwater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of water failure, smell and unsanitary conditions in the effective utilization of rainwater. <P>SOLUTION: In a treated water supply system for supplying a flush toilet or the like with rainwater from a water storage tank for storing rainwater, a stepped-up part is provided at one side upper part of the water storage tank, and the upper face of the stepped-up part is provided with a rainwater inflow port into the tank, and a cistern into which city water flows. A stepped-down reservoir part of rainwater is formed at the lower part of the water storage tank, and a city water supply pipe is piped between the bottom part of the cistern and the stepped-down reservoir part. Only when the rainwater in the water storage tank decreases to lower the water level in the stepped-down reservoir part down to a prescribed water level, required minimum city water is automatically supplied into the stepped-down reservoir part from the cistern by the opening operation of a lower ball tap of the supply pipe to continue to supply water to the flush toilet or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a domestic water supply system using rainwater.

  Japanese Utility Model Publication No. 3-36049 is known as an apparatus for utilizing rainwater of this type. The gazette divides and arranges the waste water tank of the bathtub water in the storage tank into which rainwater is introduced, and provides a switching valve between the two so that the waste water in the waste water tank is switched and supplied to the water tank when the amount of water in the water tank decreases. It describes what has been done.

However, the above publication has the inconvenience of operating the switching valve, and the bathtub water to be switched has a smell, so that there is a problem that the smell remains when used in a flush toilet. Moreover, since the amount of hot water in the bathtub is limited, there is a problem that the water is cut off when the entire amount is used.
Japanese Utility Model Publication No. 3-36049

  The problem to be solved by the present invention is to use water supply only when the rainwater in the water storage tank is extremely reduced so that the minimum amount of tap water can be automatically replenished without requiring a switching valve operation. There is no impossibility, and the backflow of rainwater in the water storage tank to the water supply pipe is surely prevented to be hygienic and no odor is generated.

  The present invention provides a water supply system in which rainwater is supplied from a water storage tank for storing rainwater to a flush toilet or the like, wherein a step height is provided on one upper side of the water storage tank, and a rainwater tank is provided on an upper surface of the step height. In addition to providing an inflow port and a cis tank into which tap water flows, a rainwater stage reservoir is formed at the bottom of the water storage tank, and a water supply replenishment pipe is connected between the bottom of the cis tank and the paragraph reservoir. Only when the rainwater in the tank has decreased to a predetermined water level in the paragraph reservoir, the necessary minimum tap water is automatically supplied from the cis tank to the paragraph reservoir by opening the lower ball tap of the supply pipe. This problem was solved by continuing to supply water to flush toilets.

  In the present invention, rainwater is stored in a water storage tank until it is full, supplied to wash a flush toilet, and supplied from a water tap for other uses. When the water level drops to a certain level, the tap water in the cis tank is automatically replenished into the paragraph reservoir by the opening action of the lower ball tap. The effect that water supply can be used is produced. Most of the water supply continues to supply rainwater in the water storage tank to the flush toilets etc., but only when the rainwater in the water storage tank is extremely reduced, the necessary minimum tap water is automatically supplied from the cis tank. To do. Since there is no need to operate the switching valve, there will be no water outage due to forgetting to operate. Moreover, by providing the upper ball tap in the cis tank, it is possible to reliably prevent the rainwater in the water storage tank from flowing back into the water supply pipe even if the lower ball tap in the paragraph reservoir is submerged.

  Since the cis tank is provided on the upper wall on the stepped portion 3 away from the full water level due to the overflow of the water storage tank, the tap water is separated by the air layer in the stepped portion, so that the sanitary aspect is also safe. Further, by providing the water storage tank at a high place, there is an effect that a constant water pressure can be applied to the water supplied by the water supply pipe 12.

  Furthermore, the present invention supplies rainwater as medium-tap water for the most part, and since tap water is only used to the minimum necessary, it is economical and can be used comfortably without producing an odor. Is produced.

  A rainwater storage tank 1 is installed at a ground height of 1.5 m or more on the platform F. An overflow 2 for preventing overflow due to full water is provided on the upper side wall of one side, and a step height 3 is provided on the upper side of the overflow side of the water storage tank 1, and a rain gutter is provided on the upper wall 4 of the step height 3. A rainwater intake 6 facing the descent cylinder 5 and a cis tank 7 are mounted and connected to a water supply pipe 9 with an upper ball tap 8a sandwiched between them, and formed at the bottom of the cis tank 7 and the lower part of one side of the water storage tank 1. A water supply water supply pipe 11 is provided between the rainwater paragraph reservoirs 10. 8a is a lower ball tap that opens and closes the pipe end of the supply pipe 11. A water supply pipe 12 is taken out from the bottom of the paragraph reservoir 10 and connected to a low tank of a flush toilet 13. Reference numeral 14 denotes a meter for measuring the amount used. 15 is a water tap for other uses.

The rainwater is stored in the water storage tank 1 through the rainwater intake 6 facing the bottom of the descent pipe 5 leading to the rain gutter and discharged from the overflow 2, that is, until the water is full, and the low tank of the flush toilet 13 is operated. Each time, it is used after being supplied as medium-tap water from the water supply pipe 12, but it does not rain, or the amount of water in the water storage tank 1 decreases due to the amount of use, etc. and only accumulates in the paragraph reservoir 10. When the water level falls below L1, the ball of the lower ball tap 8b descends, the lower end of the supply pipe 11 of the tap water is opened, and the tap water in the cis tank 7 is supplied into the paragraph reservoir 10 and the low tank of the flush toilet 13 The water will continue to be supplied without being cut off. When the water level in the paragraph reservoir 10 rises and the lower ball tap 8b rises, the supply of tap water stops. In other words, the minimum amount of tap water is supplied. Similarly, when the water level in the cis tank 7 falls below L3, the lower end of the water pipe 9 is opened by the opening action of the upper ball tap 8a, and the tap water is automatically supplied into the cis tank 7, and the upper ball tap 8a rises by returning the water level. Automatic supply will be stopped. By providing the upper ball tap in the cis tank 7, even if the lower ball tap 8b is submerged, it is surely prevented from flowing back into the water pipe.
Only when the rainwater in the water storage tank 1 becomes extremely small by repeating the above, the necessary minimum tap water is automatically replenished and water supply to the flush toilet or the like is continued.

  A filter (not shown) is attached between the descending cylinder 5 and the rainwater intake 6 of the water storage tank 1, between the water storage tank 1 and the overflow 2, and between the paragraph reservoir 10 and the water supply pipe 12. To prevent trash from entering and exiting. In the present invention, the use of only rain water and tap water does not produce any odor and ensures a comfortable use.

  The domestic water supply system according to the present invention can be installed and used in all households as long as the storage tank is installed. By making effective use of rainwater as middle tap water, it is possible to make social contributions such as cost savings and water saving.

Explanatory drawing which shows the outline | summary of the domestic water supply system of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 is a water storage tank 2 is overflow 3 is a step height part 4 is an upper wall 5 is a descent pipe connected to a rain gutter 6 is a rainwater intake 7 is a cis tank 8a is an upper ball tap 8b is a lower ball tap 9 is a water pipe 10 is a paragraph reservoir 11 Is a supply pipe 12 is a water supply pipe 13 is a flush toilet (low tank)
14 is a meter 15 is a tap for other purposes

Claims (3)

  In a water supply system in which rainwater is supplied from a water storage tank for storing rainwater to a flush toilet, etc., a step height is provided on one side upper part of the water storage tank, and a rainwater tank inlet is provided on the upper surface of the step height. In addition, a cis tank is provided to allow water supply to flow in, and a rainwater paragraph reservoir is formed at the bottom of the water storage tank. A water supply water supply pipe is provided between the bottom of the cis tank and the paragraph reservoir, and the rainwater in the water storage tank is provided. The minimum required tap water is automatically replenished from the cis tank into the paragraph reservoir by the opening operation of the lower ball tap of the replenishment pipe only when the water level decreases to a predetermined water level in the paragraph reservoir. This is a rainwater-use household sewer system characterized by continued water supply.   The domestic water supply system for home use according to claim 1, wherein an upper ball tap is provided at a pipe end of a water supply pipe for supplying water supply into the cis tank to prevent backflow into the water supply pipe.   The domestic water supply system according to claim 1 or 2, wherein a water storage tank for storing rainwater is installed at a high place so as to apply a constant water pressure to water supply to a flush toilet or the like.

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