US-20260125293-A1 - WATERWAY SYSTEM WITH RO FILTER ELEMENT

US20260125293A1US 20260125293 A1US20260125293 A1US 20260125293A1US-20260125293-A1

Abstract

Disclosed is a waterway system with an RO filter element, including an outer cylinder, an RO membrane, an RO membrane central tube, and an inner RO membrane central tube; a water inlet, a purified water outlet and a wastewater outlet are arranged at a lower end of the outer cylinder, and a valve assembly is installed in each of the water inlet, the purified water outlet and the wastewater outlet respectively; a waterway passage I is formed inside the inner RO membrane central tube, and a waterway passage II is formed; and a waterway passage III is formed between the inner RO membrane central tube and the RO membrane central tube, and the waterway passage III is communicated with the waterway passage II. The RO membrane has a double-layer central tube waterway structure that does not restrict a waterway direction of the water inlet.

Inventors

Hua Cui

Assignees

Hua Cui

Dates

Publication Date: 20260507
Application Date: 20250311
Priority Date: 20241101

Claims (10)

1 . A waterway system with an RO filter element, comprising: an outer cylinder, an RO membrane, an RO membrane central tube, and an inner RO membrane central tube; the inner RO membrane central tube is installed inside the RO membrane central tube, the RO membrane central tube is installed inside the RO membrane, and the RO membrane is installed inside the outer cylinder; a water inlet, a purified water outlet and a wastewater outlet are arranged at a lower end of the outer cylinder, and a valve assembly is installed in each of the water inlet, the purified water outlet and the wastewater outlet respectively; a waterway passage I is formed inside the inner RO membrane central tube, and the water inlet is communicated with the waterway passage I; a waterway passage II is formed between an outer wall of the RO membrane and an inner wall of the outer cylinder, and the purified water outlet is communicated with the waterway passage II; and a waterway passage III is formed between an outer wall of the inner RO membrane central tube and an inner wall of the RO membrane central tube, and the waterway passage III is communicated with the waterway passage II.
2 . The waterway system with an RO filter element according to claim 1 , wherein an opening for installation of the inner RO membrane central tube is formed at a lower end of the RO membrane central tube, a baffle is formed at an upper end of the RO membrane central tube, the baffle is provided with a central hole that cooperates with the waterway passage I, a plurality of water passing holes II are formed around an outer periphery of the central hole, and a plurality of water passing holes I are formed on an outer wall of the RO membrane central tube.
3 . The waterway system with an RO filter element according to claim 2 , wherein a lower end cover is fixed at a lower end of the RO membrane, an upper end cover is fixed at an upper end of the RO membrane, and the upper end cover is provided with a plurality of through holes that are arranged to cooperate with the water passing holes II.
4 . The waterway system with an RO filter element according to claim 3 , wherein an opening for installation of the RO membrane is formed at an upper end of the outer cylinder, an outer end cover is detachably installed on the opening, and a limiting assembly is arranged between the outer end cover and the upper end cover.
5 . The waterway system with an RO filter element according to claim 4 , wherein the limiting assembly comprises a limiting groove located at a center of an inner wall of the outer end cover and a limiting block located at a center of an outer wall of the upper end cover, wherein the limiting block corresponds to the limiting groove.
6 . The waterway system with an RO filter element according to claim 4 , wherein a decorative handle is fixed on an outer side of the outer end cover, and a LOGO identifier is fixed on an outer side of the decorative handle.
7 . The waterway system with an RO filter element according to claim 2 , wherein a silica gel ring V is sleeved on an outer wall of a lower end of the inner RO membrane central tube, and a silica gel ring IV is sleeved on an outer wall of an upper end of the inner RO membrane central tube.
8 . The waterway system with an RO filter element according to claim 2 , wherein a silica gel ring III is sleeved around outside of each of the water passing holes II.
9 . The waterway system with an RO filter element according to claim 3 , wherein a silica gel ring VI is sleeved on an outer wall of the lower end cover.
10 . The waterway system with an RO filter element according to claim 2 , wherein the valve assembly comprises an ultrasonic cover, a water cutoff accessory, and a water cutoff piece, wherein a silica gel ring II is sleeved on an outer wall of an upper end of the water cutoff piece, a lower end of the water cutoff piece is located inside the water cutoff accessory, a spring is arranged inside the water cutoff accessory, the spring is sleeved on the lower end of the water cutoff piece, both ends of the spring abut against the water cutoff piece and the water cutoff accessory, respectively, the ultrasonic cover is fixed on the outer cylinder, and a silica gel ring I is arranged between the ultrasonic cover and the water cutoff accessory.

Description

TECHNICAL FIELD The present disclosure relates to the technical field of RO filter elements, and in particular to a waterway system with an RO filter element. BACKGROUND The patent with the publication No. CN218507603U discloses an RO filter element. The RO filter element includes a filter element cylinder, an RO membrane, water stop valves, a bottom cover, a U-shaped decorative cover, and a handle, where the RO membrane is inserted into the filter element cylinder, a wastewater outlet, a purified water outlet and a water inlet are sequentially arranged at one end of the filter element cylinder, and the water stop valves are arranged in the wastewater outlet and the purified water outlet. The water stop valve includes a valve element, a valve seat, a return spring, a valve element sealing ring and a valve seat sealing ring, where the return spring is sleeved at an outer periphery of the valve element, one end of the valve element and one end of the return spring need to be inserted into the valve seat, the valve element sealing ring is sleeved at an end portion of the valve element, the valve seat sealing ring is sleeved at an outer periphery of the valve seat, a drainage pipe of the RO membrane is connected to the purified water outlet, and the wastewater outlet and the water inlet are respectively connected to an internal cavity of the filter element cylinder in a penetrating manner. The defects of this RO filter element lie in that the RO membrane has a single-layer central tube waterway structure that restricts a waterway direction of the water inlet, and a large amount of raw water and mixed wastewater accumulate inside the membrane after entry from an outer wall of the RO membrane, thereby leading to secondary neutralization of a first cup of water, increased total dissolved solids (TDS), or foul odors during use, and failing to ensure the stability of water quality. Therefore, there is room for improvement in the prior art. SUMMARY To solve the problems in the prior art, the present disclosure provides a waterway system with an RO filter element. An RO membrane has a double-layer central tube waterway structure that does not restrict a waterway direction of a water inlet, where water can enter through an inner RO membrane central tube or through a wastewater outlet, and a volume of a water inlet passage is reduced, such that a large amount of purified water remains in the waterway system with an RO filter element, thus preventing an increase in total dissolved solids (TDS) and ensuring stability of water quality. In order to realize the above objective, the technical solution of the present disclosure is as follows: a waterway system with an RO filter element, including an outer cylinder, an RO membrane, an RO membrane central tube, and an inner RO membrane central tube; the inner RO membrane central tube is installed inside the RO membrane central tube, the RO membrane central tube is installed inside the RO membrane, and the RO membrane is installed inside the outer cylinder; a water inlet, a purified water outlet and a wastewater outlet are arranged at a lower end of the outer cylinder, and a valve assembly is installed in each of the water inlet, the purified water outlet and the wastewater outlet respectively; a waterway passage I is formed inside the inner RO membrane central tube, and the water inlet is communicated with the waterway passage I; a waterway passage II is formed between an outer wall of the RO membrane and an inner wall of the outer cylinder, and the purified water outlet is communicated with the waterway passage II; and a waterway passage III is formed between an outer wall of the inner RO membrane central tube and an inner wall of the RO membrane central tube, and the waterway passage III is communicated with the waterway passage II. According to the above solution, an opening for installation of the inner RO membrane central tube is formed at a lower end of the RO membrane central tube, a baffle is formed at an upper end of the RO membrane central tube, the baffle is provided with a central hole that cooperates with the waterway passage I, a plurality of water passing holes II are formed around an outer periphery of the central hole, and a plurality of water passing holes I are formed on an outer wall of the RO membrane central tube. According to the above solution, a lower end cover is fixed at a lower end of the RO membrane, an upper end cover is fixed at an upper end of the RO membrane, and the upper end cover is provided with a plurality of through holes that are arranged to cooperate with the water passing holes II. According to the above solution, an opening for the installation of the RO membrane is formed at an upper end of the outer cylinder, an outer end cover is detachably installed on the opening, and a limiting assembly is arranged between the outer end cover and the upper end cover. According to the above solution, the limiting assembly includes a limiting groove