DETERMINING APPARATUS AND DETERMINING METHOD

• US 20110295524A1
• Filed: 05/17/2011
• Published: 12/01/2011
• Est. Priority Date: 05/26/2010
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yamazaki, Naoya, Iino, Kazuhiro, Tada, Yoshiaki, Shirakami, Takashi
• Application Number:
  US13/109,596
• Publication Number:
  US 20110295524A1
• Time in Patent Office: Days
• US Class Current: 702/45
• CPC Class Codes: H05K 7/20181 Filters; Louvers

Abstract

A determining method includes: holding a cooled device in a container; detecting a temperature inside the container; detecting a temperature outside the container; facilitating a airflow through an air filter that allows air to flow therethrough between the container and a space outside the container; calculating a packing density of components of the cooled device; detecting a power consumption of the cooled device; detecting the number of revolutions of a fan that facilitates the flow of air through the air filter; and determining that the air filter is clogged when the power consumption is less than or equal to a power threshold value, the number of revolutions is within a specified range, and a difference between the temperature inside the container and the temperature outside the container exceeds a temperature threshold value that depends on the packing density and the power consumption.

Claims

1. A determining apparatus comprising:

a container to hold a cooled device;

a first temperature detector to detect a temperature inside the container;

a second temperature detector to detect a temperature outside the container;

an air filter to allow air to flow therethrough between the container and a space outside the container;

a fan to facilitate the airflow through the air filter;

a packing density calculator to calculate a packing density of components of the cooled device;

a power consumption detector to detect a power consumption of the cooled device;

a rotational speed detector to detect a number of revolutions of the fan; and

a determining unit to determine that the air filter is clogged when the power consumption is less than or equal to a power threshold value, the number of revolutions is within a specified range, and a difference between the temperature inside the container and the temperature outside the container exceeds a temperature threshold value that depends on the packing density and the power consumption.

2. The determining apparatus according to claim 1, wherein the determining unit stops the determination of a state of the air filter when a temporal differentiation of the power consumption of the cooled device becomes less than or equal to a first negative value, and resumes the determination after the temporal differentiation of the power consumption of the cooled device is kept greater than or equal to a second negative value for a period of time, the second negative value being greater than or equal to the first negative value.

3. A determining method comprising:

holding a cooled device in a container;

detecting a temperature inside the container;

detecting a temperature outside the container;

facilitating a airflow through an air filter that allows air to flow therethrough between the container and a space outside the container;

calculating a packing density of components of the cooled device;

detecting a power consumption of the cooled device;

detecting the number of revolutions of a fan that facilitates the flow of air through the air filter; and

determining that the air filter is clogged when the power consumption is less than or equal to a power threshold value, the number of revolutions is within a specified range, and a difference between the temperature inside the container and the temperature outside the container exceeds a temperature threshold value that depends on the packing density and the power consumption.

4. The determining method according to claim 3, wherein the determination of a state of the air filter is stopped when a temporal differentiation of the power consumption of the cooled device becomes less than or equal to a first negative value, and the determination is resumed after the temporal differentiation of the power consumption of the cooled device is kept greater than or equal to a second negative value for a period of time, the second negative value being greater than or equal to the first negative value.

5. A determining apparatus comprising:

an obtaining unit configured to obtain information from an apparatus that includes a container configured to hold a cooled device, a first temperature detector configured to detect a temperature inside the container, a second temperature detector configured to detect a temperature outside the container, an air filter configured to allow air to flow therethrough between the container and a space outside the container, a fan configured to facilitate the airflow through the air filter, a packing density calculator configured to calculate a packing density of components of the cooled device, a power consumption detector configured to detect a power consumption of the cooled device, and a rotational speed detector configured to detect the number of revolutions of the fan, the information including the packing density, the power consumption of the cooled device, the number of revolutions of the fan, the temperature inside the container, and the temperature outside the container; and

a determining unit configured to determine that the air filter is clogged when the power consumption is less than or equal to a power threshold value, the number of revolutions is within a specified range, and a difference between the temperature inside the container and the temperature outside the container exceeds a temperature threshold value that depends on the packing density and the power consumption.