Cooler and flow path unit

Patent metadata

Field	Value
Publication number	US-10433457-B2
Application number	US-201715427364-A
Country	US
Kind code	B2
Filing date	Feb 8, 2017
Priority date	Feb 10, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A cooler includes: a narrow flow path that has a narrow cross-sectional area; a wide flow path that is connected to a downstream side of the narrow flow path, is in thermal contact with a heating body, and has a wide cross-sectional area; and at least one rectifying piece that is provided in an upstream portion of the wide flow path that is an upstream side from a position being in thermal contact with the heating body. A fluid refrigerant flows through the narrow flow path and the wide flow path, and heat generated by the heating body is radiated. The rectifying piece includes: a single first angle portion that protrudes toward the upstream side; and a first surface and a second surface that join at an acute angle to form the first angle portion.

First claim

The invention claimed is:

1. A cooler comprising:
a narrow flow path that has a predetermined cross-sectional area;
a wide flow path that is connected to the narrow flow path, is in thermal contact with a heating body, and has a cross-sectional area greater than that of the narrow flow path;
at least one rectifying piece that is provided in an upstream portion of the wide flow path that is closer to the narrow flow path than a position being in thermal contact with the heating body,
wherein a fluid refrigerant flows through the narrow flow path and the wide flow path, and heat generated by the heating body is radiated, and
wherein the at least one rectifying piece comprises:
a single first angle portion that protrudes toward the narrow flow path; and
a first surface and a second surface that join at an acute angle to form the first angle portion; and

a connecting surface that connects the narrow flow path and the wide flow path,
wherein the connecting surface is inclined at an acute angle or perpendicular to a center axis of the wide flow path on a side connected to the narrow flow path,
wherein an angle of the second surface with respect to the center axis of the wide flow path from the first angle portion of the at least one rectifying piece is equal to or less than an angle of the connecting surface with respect to the center axis of the wide flow path on the side connected to the narrow flow path,
wherein the narrow flow path, the wide flow path and the connecting surface are symmetrically provided with respect to a center axis of the narrow flow path and the center axis of wide flow path,
wherein a plurality of the at least one rectifying pieces are provided symmetrically and at predetermined intervals with respect to the center axis of the narrow flow path and the center axis of wide flow path,
wherein the first surface and the second surface of each piece of the plurality of the at least one rectifying pieces are inclined so as to separate from the center axis of the wide flow path, and
wherein each piece of the plurality of the at least one rectifying pieces further comprises:
a third surface that is joined to the first surface and the second surface, and does not contact with the first angle portion,
a second angle portion that is formed by the second surface and the third surface which join at an obtuse angle, and
a third angle portion that is formed by the third surface and the first surface which join at an acute angle.

2. The cooler according to claim 1 ,
wherein the second surface of the at least one rectifying piece is disposed on a broadening direction side of the wide flow path with respect to the narrow flow path from the first surface, and
wherein on a downstream side from the first angle portion,
the first surface is inclined at an acute angle or parallel to the center axis of the wide flow path,
the second surface is inclined at an acute angle with respect to the center axis of the wide flow path, and
an angle of the second surface with respect to the center axis of the wide flow path is greater than an angle of the first surface with respect to the center axis of the wide flow path.

3. The cooler according to claim 1 ,
wherein a cross-sectional shape perpendicular to the center axis of the wide flow path is rectangular, and
wherein each piece of the plurality of the at least one rectifying pieces is provided to have a columnar shape in the upstream portion of the wide flow path.

4. The cooler according to claim 1 , further comprising:
at least one fin that is provided in a position of the wide flow path facing the heating body.

5. A flow path unit comprising:
wherein a fluid flows from a narrow flow path to a wide flow path;
wherein the narrow flow path that has a narrow predetermined cross-sectional area;
a wide flow path that is connected to a downstream side of the narrow flow path and has a cross-sectional area greater than that of the narrow flow path;
at least one rectifying piece that is provided in an upstream portion of the wide flow path;
at least one fin that is provided on a downstream side from the rectifying piece of the wide flow path, and
wherein the at least one rectifying piece comprises:
a single first angle portion that protrudes toward the narrow flow path; and
a first surface and a second surface that join at an acute angle to form the first angle portion; and

a connecting surface that connects the narrow flow path and the wide flow path,
wherein the connecting surface is inclined at an acute angle or perpendicular to a center axis of the wide flow path on the downstream side of the narrow flow path,
wherein an angle of the second surface with respect to the center axis of the wide flow path from the first angle portion of the rectifying piece is equal to or less than an angle of the connecting surface with respect to the center axis of the wide flow path on the side connected to the narrow flow path,
wherein the narrow flow path, the wide flow path and the connecting surface are symmetrically provided with respect to a center axis of the narrow flow path and the center axis of wide flow path,
wherein a plurality of the at least one rectifying pieces are provided symmetrically and at predetermined intervals with respect to the center axis of the narrow flow path and the center axis of wide flow path,
wherein the first surface and the second surface of each piece of the plurality of the at least one rectifying pieces are inclined so as to separate from the center axis of the wide flow path, and
wherein each piece of the plurality of the at least one rectifying pieces further comprises:
a third surface that is joined to the first surface and the second surface, and does not contact with the first angle portion,
a second angle portion that is formed by the second surface and the third surface which join at an obtuse angle, and
a third angle portion that is formed by the third surface and the first surface which join at an acute angle.

Assignees

• Kobayashi Tomoyoshi
• Hachiya Koji
• Shimoyama Eiji
• Omron Tateisi Electronics Co

Inventors

• Kobayashi Tomoyoshi
• Hachiya Koji
• Shimoyama Eiji

Classifications

• H10W40/47 Primary

  by flowing liquids, e.g. forced water cooling · CPC title

• H10W40/22

  characterised by their shape, e.g. having conical or cylindrical projections · CPC title

• F28F1/025

  with variable shape, e.g. with modified tube ends, with different geometrical features (F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence) · CPC title

• H05K7/20254

  Cold plates transferring heat from heat source to coolant · CPC title

• F28D2021/0029

  Heat sinks · CPC title