NL194764C - Water supply method for a swimming pool. - Google Patents

Description

1 194764

Water supply method for a swimming pool

The invention relates to a water supply method for a swimming pool, wherein salt / brackish water of a certain temperature is pumped from the bottom, is fed into the swimming pool, is used as swimming water and is discharged after a predetermined period of time.

Such a method is generally known. The pumped spring water can contain many minerals, including salt, which can have a beneficial effect.

With this known method, after a certain period of time, the polluted swimming water is discharged via the sewer or discharged directly into the surface water. The salt in the drained water can be harmful to the environment.

The invention aims at overcoming this problem. This objective is achieved by bringing the discharged water back into the soil near the location where the water was pumped up. In the soil, bacteriological contamination of the returned water can be neutralized, after which this returned water can be pumped up again over time. Hereby an economical use of groundwater is obtained. Because no net groundwater is extracted from the soil, soil drying out can be prevented.

The water that is drained from the swimming pool has a temperature that is generally higher than the temperature of the groundwater. If this drained water is pumped into the ground and pumped up again over time, it is achieved that the swimming water needs to be heated less.

Preferably, however, heat is withdrawn from the discharged water before it is returned to the soil. With this extracted heat, at least a part of the swimming water can be heated.

The invention will be further elucidated on the basis of the following description of a preferred embodiment thereof with reference to the drawing, in which: figure 1 shows a schematic overview of a first embodiment in which a heat pump is applied, and figure 2 a schematic overview of a second embodiment, wherein use is made of a heat exchanger.

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With reference to figure 1, salt / brackish water is pumped up via line 2 from a predetermined depth via line 2, for example with a temperature of ± 17 ° C. The water can be connected via a pipe 3 to the circulation system (pipe 5) of a swimming pool 4, which swimming pool can be provided with heating means (not shown). For purifying the swimming water, water is fed via a pipe 5 to a filter device 6, filtered there and then returned via a pipe 7 to the swimming pool. The waste materials from the water are discharged through the filter via a sewer pipe 8. For discharging used bathing water, a valve 9 is regularly opened and, optionally with the aid of pump 10, the salt / brackish water is returned via a pipe 11 into the soil at a location near the end of the pipe 2. The returned water flows into the in the direction of the arrow 17 40 back to the inflation point and can then be reused. In the soil, any bacteriological contamination in the water from human activities can be neutralized.

In the preferred embodiment shown, a pipe 12 is also connected to the pipe 2, which leads to a heat pump 13, with which the salt / brackish water can be cooled. The heat released thereby can be used for heating the bathing water. Supply and removal of swimming water to be heated to the heat pump takes place via a line 14. The salt / brackish water cooled in the heat pump is injected into the ground via a line downstream of the pumping point. In this position, a valve 16 must close the passage between conduit 2 and 3.

In the second embodiment, which is shown in Figure 2, a heat exchanger 18 is used. Swimming water which is discharged to the bottom via line 11 still has a certain temperature. By passing this water through the heat exchanger, heat is extracted, with which swimming water possibly supplied via the line 19 to the heat exchanger 18 can be partially heated. The heated water enters the circulation system again via line 20. The embodiment shown herein does not have a pump, because it is often possible to return the water to the soil through natural decay. This is often even more desirable because it prevents blockages and a disturbance of the groundwater environment 55.

In general, the pumped up water will be clean, but it will still have to be pre-treated to meet the legal requirements for bathing water. A

Claims (2)

Such pre-treatment means, for example, that certain elements, such as iron and the like, must be removed. A disinfectant will often have to be added to the water. This can be, for example, chlorine, which is introduced into the water as such or is formed in the water by electrolysis. Some types of groundwater contain bromide, which can optionally be converted to bromine in the swimming water. The bromine has a disinfecting effect similar to chlorine. An additional loading of the bathing water with chemicals can be reduced or avoided in such a case. The water can also be passed through an ozone installation for disinfection. During his stay in the swimming pool, the swimming water is also regularly passed through a filter, such as for example a sand filter, for removing dirt particles and the like from the water. In general, the water to be returned to the soil will still be subjected to a purification step for removing disinfectants and the like therefrom. 15 A water supply method for a swimming pool, wherein salt / brackish water of a certain temperature is pumped from the bottom, is fed into the swimming pool, is used as swimming water and is drained after a predetermined period of time, characterized in that the drained water is drained into the bottom is returned near the location where the water was pumped up 20 Water supply method according to claim 1, characterized in that heat is withdrawn from the discharged water before it is returned to the soil.