ELECTRONIC APPARATUS AND FILTER DEVICE

• US 20150351288A1
• Filed: 02/26/2015
• Published: 12/03/2015
• Est. Priority Date: 05/29/2014
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Fukuda, Takashi
• Application Number:
  US14/632,153
• Publication Number:
  US 20150351288A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B01D 2279/45 for electronic devices, e.g. computers, hard-discs, mobile phones
• CPC Class Codes: B01D 46/76 involving vibrations
• CPC Class Codes: H05K 7/20181 Filters; Louvers
• CPC Class Codes: H05K 7/20727 within server blades for removing heat from heat source

Abstract

An electronic apparatus includes a housing including an opening, an object to be cooled that is disposed in the housing, an air flow generation unit that generates cooling air which flows through the opening into the housing and flows to the object to be cooled, a plurality of filter units that remove a foreign matter contained in the cooling air, a blocking unit that blocks at least one filter unit to be cleaned, among the filter units, a controller that increases a flow rate of the cooling air using the air flow generation unit, and a cleaning processing unit that cleans the filter unit to be cleaned, the filter unit to be cleaned being blocked by the blocking unit.

Claims

1. An electronic apparatus comprising:

a housing including an opening;

an object to be cooled that is disposed in the housing;

an air flow generation unit that generates cooling air which flows through the opening into the housing and flows to the object to be cooled;

a plurality of filter units that remove a foreign matter contained in the cooling air;

a blocking unit that blocks at least one filter unit to be cleaned, among the filter units;

a controller that increases a flow rate of the cooling air using the air flow generation unit; and

a cleaning processing unit that cleans the filter unit to be cleaned, the filter unit to be cleaned being blocked by the blocking unit.

2. The electronic apparatus according to claim 1,

wherein the cleaning processing unit includes a vibration mechanism that vibrates the filter unit to be cleaned.

3. The electronic apparatus according to claim 2, further comprising an impact applying unit, disposed at a position corresponding to a flow path of the cooling air in the filter unit to be cleaned, that applies an impact to the filter unit to be cleaned in response to vibration of the filter unit to be cleaned.

4. The electronic apparatus according to claim 1,

wherein the blocking unit includes:

first and second blocking members disposed on a flow path of the cooling air, the first blocking member having an opening, the second blocking member having an opening and a closure portion; and

a moving mechanism that causes the second blocking member to be selectively placed at one of a first position and a second position, the first position allowing the opening of the second blocking member and the opening of the first blocking member to communicate with each other, the second position allowing the closure portion of the second blocking member to be opposed to the opening of the first blocking member to close the opening of the first blocking member.

5. The electronic apparatus according to claim 4, further comprising

a flow rate sensor, disposed in the housing, to measure a flow rate of the cooling air,

wherein

the electronic apparatus includes a plurality of the second blocking members,

the air flow generation unit is a cooling fan,

each filter unit includes a projection,

the cleaning processing unit includes a vibration mechanism that vibrates the filter unit to be cleaned, and

the controller:

determines whether the flow rate of the cooling air decreases using the flow rate sensor,

selects the filter unit to be cleaned from among the filter units when determining that the flow rate of the cooling air decreases,

moves at least one of the second blocking members, which corresponds to the selected filter unit to be cleaned, to the second position using the moving mechanism,

increases a rotational speed of the cooling fan from a predetermined rotational speed to increase the flow rate of the cooling air,

vibrates the selected filter unit to be cleaned in vertical direction for a predetermined time so that the projection of the selected filter unit to be cleaned collides with the first blocking member using the vibration mechanism,

moves the at least one of the second blocking members, which corresponds to the selected filter unit to be cleaned, to the first position using the moving mechanism,

changes the increased rotational speed of the cooling fan to the predetermined rotational speed, and

determines whether the flow rate of the cooling air is greater than or equal to a given value.

6. A filter device comprising:

a plurality of filter units that are removably attached to an opening provided in a housing of an electronic apparatus and remove a foreign matter from cooling air that flows to an object to be cooled disposed in the housing from the opening of the housing;

a blocking unit that blocks at least one filter unit to be cleaned, among the filter units; and

a cleaning processing unit that cleans the filter unit to be cleaned which is blocked by the blocking unit.

7. The filter device according to claim 6,

wherein the cleaning processing unit includes a vibration mechanism that vibrates the filter unit to be cleaned.

8. The filter device according to claim 7, further comprising

an impact applying unit, disposed at a position corresponding to a flow path of the cooling air in the filter unit to be cleaned, that applies an impact to the filter unit to be cleaned in response to vibration of the filter unit to be cleaned.

9. The filter device according to claim 6,

wherein the blocking unit includes:

first and second blocking members disposed on a flow path of the cooling air, the first blocking member having an opening, the second blocking member having an opening and a closure portion; and

a moving mechanism that causes the second blocking member to be selectively placed at one of a first position and a second position, the first position allowing the opening of the second blocking member and the opening of the first blocking member to communicate with each other, the second position allowing the closure portion of the second blocking member to be opposed to the opening of the first blocking member to close the opening of the first blocking member.