JPH031046Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a bathtub water circulation filtration device that is most suitable for home use.

(Problems to be solved by conventional technology and ideas) Conventional bathtub water circulation filtration devices
As shown in Publication No. 51395, circulating water is introduced from the top of the filter and filtered downward, so filtered waste remains in the filter layer, and if left for a long time, the water will flow back. However, this dust adheres to the filter layer and cannot be easily removed, so it is necessary to remove this dust frequently, and since it is difficult to remove, it has to be replaced frequently.

(Means for Solving the Problems) The present invention aims to solve such problems, and the present invention is to dispose a filter above the water surface of the bathtub, and to install a water inlet below the filtration layer of the filter. A water outlet is provided at the top, and a drain plug is provided at the bottom of the filter, which is closed when the circulation pump is driven and opened when the drive is stopped.

(Function) When the circulation pump is driven, the bathtub water enters the filter and flows through the filtration layer from below to above, and the bathtub water is filtered. When the circulation pump is stopped, the drain valve is opened and the remaining water in the filter flows from the top to the bottom, washing the filtration layer and draining away along with the dirt from the drain port at the bottom of the filter.

(Example) 1 is a bathtub, 2 is a circulation pump, and 3 is a filter, which are connected in series by a circulation path 4. The filter 3 is arranged above the bathtub water level above the bathtub 1, and has a water inlet 6 below a filtration layer 5 provided inside, a water outlet 7 above, and a water stopper at the bottom that opens when circulation is stopped. A drain plug 8 is provided. 9 is a bypass path that bypasses the filter 3;
This bypass path 9 is provided with a valve 10 that opens when the circulation path upstream of the filter 3 is overpressured. Reference numeral 11 denotes a bypass path of the circulation pump 2, and a valve 12 that opens when overpressure is provided, similar to the bypass path 9 described above. Reference numeral 13 denotes a drain pipe provided below the drain port 14 of the filter 3 to receive waste water.

In the above configuration, when the circulation pump 2 is driven, the bathtub water flows from the bottom to the top of the filtration layer 5 and is filtered. When the filtration is completed and the circulation pump 2 is stopped, the drain valve 8 is opened and the remaining water in the filter 3 flows backwards from above to below the filtration layer 5 and is discharged from the drain port 14 to the drain pipe 13. During this backflow, the filtration layer 5 is washed by the remaining water, and the dirt is discharged together with the remaining water. At this time, the drain port 14 is opened to the atmosphere, but since the air release position is located above the water surface of the bathtub 1, the water in the bathtub 1 is not drained. In addition, in the example, all of the bath water is filtered through the filter 3.
However, if a bypass path for the filter 3 is provided to send some of the bath water to the filter 3, a pump with a small capacity can be used as the circulation pump 2.

(Effects of the invention) As explained above, according to the invention, the filtration layer is washed with residual water every time circulation filtration is completed, and dirt is discharged from the filter together with the residual water, thereby preventing clogging of the filter. Therefore, the trouble of cleaning and replacing the filter, which was a problem in the past, can be reduced.

In addition, since the remaining water in the filter is drained when the circulating filtration device is not in use, there is no need to take into account freezing in the filter to prevent freezing in winter, which has the advantage of simplifying the structure of the device to prevent freezing. be.

[Brief explanation of the drawing]

The drawing is an overall configuration diagram showing an embodiment of the present invention. 1... Bathtub, 2... Circulation pump, 3... Filter, 5... Filter layer, 6... Water inlet, 7... Water outlet, 8... Drain plug.

Claims (1)

[Scope of utility model registration request] In a bathtub, a circulation pump, and a filter connected through a circulation path, the filter is disposed above the water surface of the bathtub, and the filter is provided with a water inlet below the filtration layer and a water outlet above the filter layer. A circulating filtration device for bathtub water, characterized in that a drain plug is provided at the bottom of the filter, the drain plug being closed when the circulation pump is driven and opened when the drive is stopped.