Expansion tank, cooling system, and vehicle

Patent metadata

Field	Value
Publication number	US-12467401-B2
Application number	US-202318223821-A
Country	US
Kind code	B2
Filing date	Jul 19, 2023
Priority date	Jun 18, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

An expansion tank, including a tank body, in which a first chamber, a second chamber, and a first through hole through which the first chamber communicates with the second chamber are provided; the tank body has a pipe communicating with an interior of the tank body, and a side wall of the pipe has a mixed liquid inlet; a second partition is provided within the pipe; one end of the second partition is connected to the side wall and the other end of the second partition extends to the mixed liquid inlet to form a first channel and a second channel; a first end of the first channel is connected to the first chamber, a second end of the first channel is closed, a first end of the second channel is connected to the second chamber, and a second end of the second channel is connected to a water pump.

First claim

What is claimed is:

1 . An expansion tank comprising a tank body; a first partition within the tank body, where the first partition is extended in a longitudinal direction of the expansion tank to divide an interior of the tank body into a first chamber and a second chamber, the first partition is provided with a first through hole, and the first chamber communicates with the second chamber through the first through hole;
wherein the first chamber comprises a plurality of first sub-chambers, a third partition is provided between two adjacent first sub-chambers, the third partition is provided with a third through hole; and the second chamber comprises a plurality of second sub-chambers, a fourth partition is provided between two adjacent second sub-chambers, and the fourth partition is provided with a fourth through hole; and the third partition and the fourth partition are parallel to each other and perpendicular to and connected to the first partition; the tank body is provided with a pipe communicating with an interior of the tank body, and a side wall of the pipe is provided with a mixed liquid inlet; a second partition is provided within the pipe, one end of the second partition is connected to the side wall of the pipe and the other end of the second partition extends to the mixed liquid inlet so as to form a first channel and a second channel within the pipe; the mixed liquid inlet is connected to a side wall of the first channel and a side wall of the second channel; and in a direction perpendicular to an axis of the mixed liquid inlet, a first end of the first channel is connected to the first chamber, a second end of the first channel is closed, a first end of the second channel is connected to the second chamber, and a second end of the second channel is configured to be connected to a water pump.

2 . The expansion tank according to claim 1 , wherein an area of the mixed liquid inlet communicating with the first channel is smaller than an area of the mixed liquid inlet communicating with the second channel.

3 . The expansion tank according to claim 2 , wherein the area of the mixed liquid inlet communicating with the first channel is 0-25% of the area of the mixed liquid inlet communicating with the second channel.

4 . The expansion tank according to claim 1 , wherein an end cap is provided on the second end of the first channel, and the end cap is fixedly connected to the pipe and the second partition.

5 . The expansion tank according to claim 1 , wherein the pipe is cylindrical or prismatic in shape, an axis of the pipe is perpendicular to an axis of the mixed liquid inlet.

6 . The expansion tank according to claim 1 , wherein the tank body includes a first sub-tank body and a second sub-tank body, the first sub-tank body and the second sub-tank body are welded to form the tank body.

7 . The expansion tank according to claim 1 , wherein the first through hole is provided between the first sub-chambers and the second sub-chambers adjacent to the first sub-chambers; or the first through hole is provided between one first sub-chamber of the first sub-chambers and one second sub-chamber of the second sub-chambers adjacent to the one first sub-chamber.

8 . The expansion tank according to claim 1 , wherein a plurality of reinforcing ribs are further provided within the tank body.

9 . The expansion tank according to claim 8 , wherein the reinforcing ribs are plate-shaped, and are provided along a direction parallel to the first partition, or are provided along a direction parallel to the third partition and the fourth partition.

10 . A cooling system comprising a water pump, a part to be cooled, a heat exchanger, and the expansion tank according to claim 1 ; and the water pump, the part to be cooled, the heat exchanger, and the expansion tank are connected in turn by pipelines, wherein the heat exchanger is connected to the mixed liquid inlet of the expansion tank, the second channel of the expansion tank is connected to the water pump.

11 . A vehicle comprising the cooling system according to claim 10 .

12 . The expansion tank according to claim 1 , wherein the first chamber comprises two third partitions, the second chamber comprises two fourth partitions, and the first through hole is provided between the two third partitions and between the two fourth partitions.

Assignees

• Geely Holding Group Co Ltd
• Ningbo Geely Automobile Res And Development Co Ltd

Inventors

• Li Guibin
• Lin Bingrong
• Xu Junbo

Classifications

• F01P5/10

  Pumping liquid coolant; Arrangements of coolant pumps · CPC title

• F01P3/18

  Arrangements or mounting of liquid-to-air heat-exchangers (such arrangements on cylinders or cylinder heads F01P3/04; relative to vehicles B60K11/04) · CPC title

• F01P11/028

  Deaeration devices · CPC title

• B60K11/02

  with liquid cooling · CPC title

• F01P11/04

  Arrangements of liquid pipes or hoses · CPC title