JPS61174991A - Filter to regulate water quality - Google Patents

Abstract

PURPOSE:To obtain the titled filter capable of providing drinking water contg. a practically constant amt. of mineral components when the water is passed through the filter by forming on heating the coarse granular powder of an insoluble synthetic resin on whose surface the fine granular powder of the mineral components are deposited. CONSTITUTION:The fine granular powder of a mixture of mineral components such as the carbonate, bicarbonate, etc. of Ca, Mg, K, Ha, etc. is deposited on the surface of the coarse granular powder of a synthetic resin such as insoluble polyethylene while the resin is heated at a temp. close to the m.p. of the resin. The coarse granular powder is formed into a filter wherein the grains are melt-stuck to each other. When the filter is used, the elution of the mineral components is reduced when the passage of water is stopped, and drinking water contg. a practically constant amt. of mineral components can be obtained when the water is passed through the filter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a water purifier filter that dissolves and adds mineral components to drinking water.

[Conventional technology]

Conventional mineral elution filters used in water purifiers have an insufficient structure of pores in the carrier material for mineral components, resulting in less elution of minerals into the water that passes through the filter. Component additives have the drawback of being eluted during still water, resulting in high concentrations, or losing their shape, making them unusable.

[Problem that the invention seeks to solve]

An object of the present invention is to provide a filter that can produce mineral-containing drinking water with almost constant concentration during one water flow, with minimal elution of mineral components when the water is stopped.

[Means for solving problems]

According to the present invention, a filter for water quality adjustment is constructed by molding and heating coarse-grained powder of an insoluble synthetic resin on which fine-grained powder of a mineral component is adhered.

〔Example〕

An embodiment of the present invention will be explained with reference to FIG.

On the surface of the insoluble polyethylene coarse particles 18.

A mixture 19 of fine particles of mineral components such as soluble carbonates and bicarbonates such as calcium, magnesium, potassium, and sodium is applied to the polyethylene powder while it is heated to near its melting point.

The coarse powder thus obtained is molded and the coarse powder is fused together to form a filter shape. Inside the filter 12, a water passage 20 indicated by W and a large number of cavities 21 opening toward the water passage 20 are formed. The water is stationary within the cavity 21 and flows only through the water passage 20. In the cavity 21, the soluble particles 19 attached to the surface of the insoluble coarse particles dissolve in the water in the cavity 21 to form a saturated solution, but the saturated solution does not flow out into the passage. For water present in the passageway 20, through the opening of the cavity 21, the solute of the saturated solution within the cavity simply elutes into the water within the passageway 20 by diffusion. This elution amount increases as the flow rate of water in the passage 2o increases, and decreases as the flow rate of water in the passage 2o decreases. In this way, the concentration of soluble components eluted into the water passing through the filter 12 is adjusted. If the size of the cavity is small, the inner surface area of the cavity as a whole increases.

The size of the cavity can be easily obtained on the order of several μm by selecting the particle size of the polyethylene particles.

FIG. 2 is an example of water purification photography using the filter of the present invention. 6 is a cartridge, 8 is a faucet, and 11 is a purified water outlet. The filter 12 is inserted into the cartridge 6, and activated carbon 17 is filled thereon for use.

[Effect]

As described in the explanation of FIG. 1 of the embodiment, drinking water containing minerals whose concentration is almost constant during water flow is obtained.

〔Effect of the invention〕

According to the present invention, the concentration of mineral components eluted into drinking water can be automatically adjusted, and the filter is obtained by heat molding and can be easily cut, making it suitable for mass production. be.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of the filter of the present invention, and FIG. 2 is a partially cross-sectional perspective view of the filter in use. 6... Cartridge, 8... Faucet, 11... Purified water outlet, 12... Filter, 17... Activated carbon, 18
...Insoluble coarse particles, 19...Soluble fine particles, 20.
...Waterway, 21...Cavity.

Claims (1)

[Claims] 1. A filter for water quality adjustment constructed by molding and heating coarse-grained insoluble synthetic resin powder with fine-grained mineral component powder attached to its surface.