JPH0191920U

JPH0191920U -

Info

Publication number: JPH0191920U
Application number: JP18823887U
Authority: JP
Priority date: 1987-12-10
Filing date: 1987-12-10
Publication date: 1989-06-16

Description

[Brief explanation of the drawing]

第１図はプリント配線板に対する温度センサの
装着状態を説明する概略図、第２図は温度センサ
からの温度検出信号に基いて冷却異常を検出する
装置の電気的構成を示す概略ブロツク図、第３図
、および第４図は他の実施例の冷却異常検出動作
を説明する概略図、第５図は従来の冷却異常検出
動作を説明する概略図。１……プリント配線板、２……最も発熱量が多
い電子部品、３……第１の温度センサ、４……第
２の温度センサ、５，７，８……比較部、６……
差算出部。 Fig. 1 is a schematic diagram illustrating how a temperature sensor is attached to a printed wiring board; Fig. 2 is a schematic block diagram illustrating the electrical configuration of a device that detects a cooling abnormality based on a temperature detection signal from the temperature sensor; 3 and 4 are schematic diagrams illustrating the cooling abnormality detection operation of other embodiments, and FIG. 5 is a schematic diagram illustrating the conventional cooling abnormality detection operation. DESCRIPTION OF SYMBOLS 1... Printed wiring board, 2... Electronic component that generates the most amount of heat, 3... First temperature sensor, 4... Second temperature sensor, 5, 7, 8... Comparison section, 6...
Difference calculation section.

Claims

[Claims for Utility Model Registration] 1. In a forced air-cooled electronic device in which a fan generates an air flow along the surface of a board 1 on which electronic components are mounted and removes heat generated by the electronic components, an electronic device located upstream of the air flow A temperature sensor 3 is provided above the component 2, and a temperature sensor 4 is also provided at a predetermined position on the downstream side of the air flow.
1. A cooling abnormality detection device for a forced air-cooled electronic device, characterized in that the device is provided with a determining means for determining the presence or absence of a cooling abnormality and the type of cooling abnormality based on the detected temperature. 2. The cooling abnormality detection device for a forced air-cooled electronic device according to claim 1, wherein the electronic component located upstream of the air flow is the electronic component 2 that generates the largest amount of heat. 3. The cooling abnormality detection device for a forced air-cooled electronic device according to claim 2, wherein the electronic component 2 that generates the largest amount of heat is installed at the most upstream side of the air flow. 4 The determining means determines whether or not the fan is in a stopped state based on the temperature detected by the upstream temperature sensor 3, and determines whether or not the air flow rate is reduced based on the difference between the temperatures detected by both temperature sensors 3 and 4. A cooling abnormality detection device in a forced air-cooled electronic device according to claim 1 of the above-mentioned utility model registration claim. 5. In the forced air-cooled electronic device according to claim 4 of the above utility model registration claim, wherein the determining means also determines whether or not there is a need to stop energizing based on the difference in temperature detected by both temperature sensors 3 and 4. Cooling abnormality detection device.