Electronic apparatus

Patent metadata

Field	Value
Publication number	US-9795067-B2
Application number	US-201515300319-A
Country	US
Kind code	B2
Filing date	Apr 3, 2015
Priority date	Apr 3, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An electronic apparatus includes heat generating components accommodated in a sealed housing section of a housing, an internal-side heat exchanger and an external-side heat exchanger on opposing sides of a wall of the housing, an external-side heat exchanger for heat generating components for heat exchange between the heat generating components and air outside the housing section, and an internal fan. A high-heat generating component generating the most heat contacts the inner surface and opposed to the external-side heat exchanger for heat generating components. Heat exchange between the high-heat generating component and air outside the housing section is effected via the external-side heat exchanger for heat generating components. Heat exchange between air inside the housing section and air outside the housing section is effected via the internal-side heat exchanger and the external-side heat exchanger.

First claim

The invention claimed is:

1. An electronic apparatus comprising:
a housing including a sealable housing section;
a plurality of heat generating components accommodated within the housing section;
an internal-side heat exchange section disposed in contact with one inner surface of one wall of the housing configuring the housing section, the one inner surface facing the housing section;
an external-side heat exchange section including:
a first external-side heat exchange section portion disposed in contact with one outer surface of the one wall in an opposed relationship with the internal-side heat exchange section, the one outer surface facing an outside of the housing section; and
a second external-side heat exchange section portion for heat exchange between the heat generating components and external air outside the housing section; and

an internal fan accommodated within the housing section, wherein
the heat generating components include a high-heat generating component disposed in contact with the one inner surface in an opposed relationship with the second external-side heat exchange section portion, the high-heat generating component generating a largest amount of heat among the heat generating components during an operation,
the internal fan circulates internal air in the housing section to deliver the internal air to the internal-side heat exchange section,
heat exchange between the high-heat generating component and the external air outside the housing section is effected through the second external-side heat exchange section portion, and
heat exchange between the internal air inside the housing section and the external air outside the housing section is effected through the internal-side heat exchange section and the first external-side heat exchange section portion.

2. The electronic apparatus according to claim 1 , wherein the internal-side heat exchange section comprises a plurality of protrusions arrayed in a lattice shape on the one inner surface.

3. The electronic apparatus according to claim 2 , wherein the protrusions have elongated shapes extending in a direction in which the internal air circulating in the housing section flows into the internal-side heat exchange section.

4. The electronic apparatus according to claim 2 , wherein the protrusions have elongated shapes extending in a direction in which the internal air inside the housing section having flowed into the internal-side heat exchange section is guided in a predefined circulating direction.

5. The electronic apparatus according to claim 1 , wherein the first external-side heat exchange section portion and the second external-side heat exchange section portion are integrated together.

6. The electronic apparatus according to claim 1 , wherein
the first external-side heat exchange section portion and the second external-side heat exchange section portion are disposed within a heat radiating section defined by surfaces one of which is the one outer surface,
the heat radiating section includes an external air fan that discharges the external air inside the heat radiating section, and
a position of the internal-side heat exchange section in a height direction of the housing is set on an upstream side of the high-heat generating component in a direction in which the external air fan discharges the external air inside the heat radiating section.

7. The electronic apparatus according to claim 1 , wherein the high-heat generating component includes a switching semiconductor element that converts DC power into AC power by performing a switching operation.

Assignees

• Mitsubishi Electric Corp

Inventors

• Takezawa Ryuichi
• Aoki kumi

Classifications

• H05K7/20136

  Forced ventilation, e.g. by fans (H05K7/202 takes precedence) · CPC title

• H05K7/209

  Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20909 takes precedence) · CPC title

• H05K7/20145

  Means for directing air flow, e.g. ducts, deflectors, plenum or guides · CPC title

• H02M7/48

  using discharge tubes with control electrode or semiconductor devices with control electrode · CPC title

• H02M7/003

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title