Composite filter and water purifier having same

Patent metadata

Field	Value
Publication number	US-2025025811-A1
Application number	US-202218709138-A
Country	US
Kind code	A1
Filing date	Jul 22, 2022
Priority date	Nov 16, 2021
Publication date	Jan 23, 2025
Grant date	—

Abstract

A composite filter and a water purifier having the composite filter are provided. The composite filter includes: a cover cap in which a first inner space is formed; a lower filter structure including a lower filter; a connection tube in which a first connection tube space and a second connection tube space are formed; a housing body in which a second inner space is formed; an upper filter structure which divides the second inner space into a first housing body space and a second housing body space and includes an upper filter; and a housing head including a first water inlet port, a first water outlet port, a second water inlet port, and a second water outlet port.

First claim

1 . A composite filter, comprising:
a cover cap in which a first inner space is formed therein; a lower filter structure disposed in the first internal space and including a lower filter; a connection tube extending in length, having a first connection tube space and a second connection tube space formed therein extending in the longitudinal direction, having a lower end coupling to the lower filter structure, thereby, together with the lower filter structure, partitioning the first inner space into a first cover cap space and a second cover cap space; a housing body in which a second inner space with an upper side opening to the outside is formed and the cover cap, the lower filter structure, and the connection tube are disposed in the second inner space; an upper filter structure comprising an upper filter, the upper filter structure being disposed above the lower filter structure, coupled to the connection tube, and having a lower end coupled to the cover cap, thereby partitioning a space above the cover cap among the second inner space into a first housing body space and a second housing body space; a housing head coupled to the upper side of the housing body, having a first water inlet space, a first water outlet space, a second water inlet space, and a second water outlet space formed therein, and having a first water inlet port connected to the first water inlet space, a first water outlet port connected to the first water outlet space, a second water inlet port connected to the second water inlet space, and a second water outlet port connected to the second water outlet space; a first flow path formed such that through which first raw water introduced into the first water inlet port passes through the first water inlet space, the first housing body space, the upper filter, the second housing body space, and the first water outlet space, and then is discharged through the first water outlet port into first purified water; and a second flow path formed such that through which second raw water introduced into the second water inlet port passes through the second water inlet space, the first connection tube space, the first cover cap space, the lower filter, the second cover cap space, the second connection tube space, and the second water outlet space, and then is discharged through the second water outlet port into second purified water.

2 . The composite filter of claim 1 ,
wherein the housing head comprises: a housing head body covering the upper side of the housing body; a first partition wall extending downward from the housing head body to partition the first water inlet space and the first water outlet space; a second partition wall extending downward from the housing head body to partition the first water outlet space and the second water outlet space; and a third partition wall extending downward from the housing head body to partition the second water outlet space and the second water inlet space, wherein the first partition wall, the second partition wall, and the third partition wall are sequentially formed in a cylindrical shape with a small diameter.

3 . The composite filter of claim 2 ,
wherein the connection tube comprises: an outer wall formed in a tubular shape and having at least one through hole formed at a lower end to connect the second connection tube space and the second cover cap space; and a guide wall disposed inside the outer wall to partition the first connection tube space and the second connection tube space, wherein the upper end of the guide wall is coupled to the third partition wall so that the second water inlet space and the first connection tube space are connected, and the upper end of the outer wall is coupled to the second partition wall so that the second water outlet space and the second connection tube space are connected.

4 . The composite filter of claim 3 ,
wherein the connection tube further comprises: a connection tube body formed between the lower end of the outer wall and the lower end of the guide wall to close the lower side of the second connection tube space so that the second connection tube space is partitioned from the first cover cap space and open the lower side of the first connection tube space so that the first connection tube space is connected to the first cover cap space, and at least one protrusion protruding downward from the connection tube body so that the lower end of the lower filter structure is spaced apart from the cover cap.

5 . The composite filter of claim 2 ,
wherein the upper filter is formed in a hollow shape so that the first housing body space is formed on the outside and the second housing body space is formed on the inside, the upper filter structure comprises: a first upper cap supporting the upper side of the upper filter; and a first lower cap supporting the lower side of the upper filter, and the connection tube is disposed through the upper filter, the first upper cap, and the first lower cap.

6 . The composite filter of claim 5 ,
wherein the first upper cap further comprises a cylindrical guide member that extends upward to partition the first housing body space and the second housing body space and is coupled to the first partition wall, and the connection tube is disposed through the inside of the guide member.

7 . The composite filter of claim 1 ,
wherein the lower filter is formed in a hollow shape so that the first cover cap space is formed on the outside and the second cover cap space is formed on the inside, the lower filter structure comprises: a second upper cap supporting the upper side of the lower filter; and a second lower cap supporting the lower side of the lower filter, and the connection tube is disposed through the lower filter, the second upper cap, and the second lower cap so that the lower end of the connection tube is disposed in the second cover cap space.

8 . The composite filter of claim 7 , further comprising a hollow additional filter disposed in the second cover cap space.

9 . The composite filter of claim 1 ,
further comprising an external filter with one side connected to the first water outlet port and the other side connected to the second water inlet port, wherein the first water outlet port is connected to the second water inlet port through the external filter, and the second raw water is the first purified water.

10 . A composite filter, comprising:
a housing body in which a first inner space is formed; a first filter structure disposed in the first inner space, having a first filter, and partitioning a first housing body space defined by the outer circumferential surface of the first filter and the inner circumferential surface of the housing body; a connection tube extending in length to penetrate the first filter, having a first connection tube space and a second connection tube space formed therein extending in the longitudinal direction, and partitioning a second housing body space defined by the outer circumferential surface thereof and the inner circumferential surface of the first filter; a housing head disposed on the upper side of the housing body, having a first water inlet space and a first water outlet space formed therein, and having a first water inlet port connected to the first water inlet space and a first water outlet port connected to the first water outlet space; and a first flow path formed such that through which first raw water introduced into the first water inlet port passes through the first water inlet space, the first connection tube space, the first housing body space, the first filter, the second housing body space, the second connection tube space, and the first water outlet space, and then is di

Assignees

• Coway Co Ltd

Inventors

• Moon Tae Hun
• Yun Sung Han
• Ryu Geun Sang
• Han Doo Won
• Lee Jung Hun

Classifications

• B01D2201/302

  having inlet or outlet ports · CPC title

• B01D35/30 Primary

  Filter housing constructions · CPC title

• B01D35/1573

  Flow control valves · CPC title

• B01D29/33

  arranged for inward flow filtration · CPC title

• B01D29/58 Primary

  arranged concentrically or coaxially · CPC title