JP2590741B2 - Equipment for evaluating heat dissipation performance of electronic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiation performance evaluation apparatus for evaluating the heat radiation performance of electronic equipment which is forcibly cooled by a blower.

[0002]

2. Description of the Related Art Conventionally, in electronic equipment that is forcibly cooled by a blower of this type, the necessary air flow and pressure loss are calculated by examining thermal design conditions (heat generation, allowable temperature of parts, mounting structure and installation environment conditions). Then, the optimum blower is selected from the flow rate-pressure loss characteristics of various blowers.

[0003] A method of evaluating the heat radiation performance when using the blower selected by this thermal design is to put the electronic device in a constant temperature bath, change the temperature to the upper limit of the operating temperature range of the device, and then make the electronic device operate normally. It was confirmed that it would work. Also, in electronic devices that mount temperature-sensitive electronic components or electronic components that generate a large amount of heat compared to the surface area,
Due to severe heat radiation conditions, an experimental device similar to the product was manufactured, and air was sent into the experimental device in a thermostat using a blower with variable flow rate, and the heat radiation performance such as pressure loss was measured.
A method of selecting an optimal blower by analyzing the measured data has been adopted.

[0004]

In the above-described conventional method for evaluating the heat radiation performance of electronic equipment, the pressure and flow velocity of the air to be cooled could be varied by controlling the number of revolutions using a variable flow type blower. However, the heat radiation performance at the upper limit of the operating temperature range of the device could not be accurately measured unless the device was placed in a thermostat. On the other hand, in the thermostatic bath, a temperature sensor is fixed at a specific point, and unless it is at that position, temperature control in the thermostatic layer cannot be performed, and the measurement position is limited. Further, when measuring the heat radiation performance of the electronic device in the thermostat, there is a disadvantage that the temperature inside the electronic device cannot be controlled, and the temperature of the electronic components disposed inside the electronic device cannot be measured accurately. Further, when measuring the temperature of the outlet of the electronic device, there is a disadvantage that the temperature is easily affected by the ambient temperature and the detection accuracy is poor. Further, there is a drawback that it takes a considerable amount of time and effort to calculate a flow rate, a pressure loss, and a heat radiation amount from the detected temperature, pressure, and wind speed data and select an appropriate blower.

Accordingly, the present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to accurately and quickly evaluate heat radiation performance, thereby selecting an optimal blower. An object of the present invention is to provide an apparatus for evaluating heat radiation performance of an electronic device, which is performed accurately and in a short time.

[0006]

In order to achieve this object, an apparatus for evaluating heat dissipation performance of an electronic device according to the present invention is provided around intake and exhaust ports of an electronic device and electronic components in the electronic device. A sensor for detecting temperature, pressure, and flow velocity of air, a first air duct connected to the exhaust port to exhaust air inside the electronic device to the outside, and an external air connected to the intake port to inside the electronic device. A second air duct to be sent in, an air conditioner to send air controlled so that a selected one of the sensors has a designated temperature to the electronic device through the second air duct, and an air conditioner controlled by the air conditioner The temperature, pressure, and flow rate of the air are compared with the temperature, pressure, and flow rate of the air detected by the sensor at the exhaust port, and the calorific value of the electronic device, the required flow rate, and the pressure loss in the electronic device are calculated. The flow rate of previously stored various blower - comparing the pressure drop data is obtained by an arithmetic unit for selecting optimum blower. Further, in the heat radiation performance evaluation device for an electronic device according to the present invention, the first and second air ducts have a flexible structure, and the connection of the first and second air ducts to the exhaust port and the intake port is detachable. This was done via an adapter.

[0007]

According to the present invention, a sensor provided around an intake port of an electronic device or an electronic component is appropriately selected, and air is sent out by an air conditioner so that the selected sensor has a designated temperature. The temperature, pressure, and flow rate of the controlled air are compared with the temperature, pressure, and flow rate of the air detected by the exhaust port sensor. The loss is calculated, the result of the calculation is compared with the flow rate-pressure loss data of various blowers stored in advance, and an optimum blower is selected. Also,
According to the present invention, when the shape and position of the intake port and the exhaust port are changed by various electronic devices, the adapter is replaced,
This is dealt with by freely deforming the air duct.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an apparatus for evaluating heat dissipation performance of electronic equipment according to the present invention, and FIG. In these figures, an electronic device generally denoted by reference numeral 1 has an electronic component 11 mounted therein and an exhaust port 4 and an intake port 5 provided therein. Attachment fittings 41 and 51 which are detachable adapters are detachably attached to the exhaust port 4 and the intake port 5, and these fittings 41 and 51 are attached to the exhaust port 4 and the intake port 5.
Various types are prepared depending on the shape of the device. Reference numeral 6 denotes a first air duct, one end of which is attached to the exhaust port 4 via the mounting bracket 41 and the other end of which is a first air duct for discharging air in the electronic device 1 connected to the air conditioner 2 to be described later to the outside. It has a structure. Reference numeral 7 denotes a second air duct, one end of which is attached to the intake port 5 via the mounting bracket 51 and the other end of which sends air into the electronic device 1 connected to the air conditioner 2 and has a flexible structure. . 8a to 8c are:
Sensors for detecting temperature, pressure, and flow velocity of air, which are arranged around the electronic component 11, the exhaust port 4, and the intake port 5, respectively.

The air conditioner 2 includes a heater 22 and a refrigerator 2
3 and a temperature controller 21 for controlling the blower 24 and a recorder 25 are built in. The sensors 8a to 8c arranged at three places are connected to the temperature controller 21. The blower 24 has the end of the first air duct 6 and the second
The air discharged from the electronic device 1 to the first air duct 6 is connected to the start end of the air duct 7, and enters the air conditioner 2, where the heater 22 is operated by a control signal from the temperature controller 21. The temperature is adjusted to the designated temperature by the refrigerator 23 and the blower 24, and air is sent into the electronic device 1 from the second air duct 7. Reference numeral 3 denotes a data processing unit, which includes a calculation unit 31, a processing unit 32, and a display unit 33 connected to the temperature controller 21 by a cable.

Next, the operation of the heat radiation performance evaluation apparatus for electronic equipment having such a configuration will be described. First, the ambient temperature of the electronic component 11 mounted on the electronic device 1 is input to the temperature controller 21 by the sensor 8a, and the designated temperature of air at the intake port 5 is input to the temperature controller 21. Thereafter, the control of the heater 22, the refrigerator 23 and the blower 24 is performed until the temperature is stabilized at the specified temperature, and at the same time, the temperature and the temperature set around the exhaust port 4, the intake port 5 and the electronic component 11 of the electronic device 1 are controlled. The air condition is detected by the pressure / flow rate sensor 8a, the signal is transmitted to the temperature controller 21, the detection result of the sensor 8a is compared with the specified temperature, and the result is recorded in the recorder 25.

Further, the arithmetic unit 31 includes a temperature controller 21
The calorific value, flow velocity, and pressure loss in the electronic device are calculated from the difference between the temperature, pressure, and flow velocity of the air controlled by the above and the temperature, pressure, and flow velocity of the air detected by the sensor 8b of the exhaust port 4. Then, the result is compared with the flow rate-pressure loss data of various blowers stored in advance, the optimum blower is selected, and the result is displayed on the display 33.

[0012]

As described above, according to the present invention, a sensor for detecting the temperature, pressure, and flow velocity of air provided around the intake and exhaust ports of an electronic device and electronic components in the electronic device, A first air duct connected to the exhaust port to exhaust air inside the electronic device to the outside, a second air duct connected to the intake port to send air from outside into the electronic device, and a sensor selected from among the sensors. An air conditioner that sends air controlled by a sensor to a designated temperature to an electronic device through the second air duct, and a temperature / pressure / flow rate of air controlled by the air conditioner and a sensor at the exhaust port. Comparing the detected temperature, pressure and flow velocity of the air, calculating the calorific value of the electronic equipment, the required flow rate and the pressure loss in the electronic equipment, and calculating the calculation results and the flow rate-pressure loss data of various blowers stored in advance. And a calculation unit for selecting the optimal blower, automatically calculating the heat dissipation performance of electronic equipment, that is, the calorific value, pressure loss, and the flow rate required for cooling, and determining the optimal blower in a short time. Can be selected accurately. In addition, since the intake air temperature in the electronic device can be set arbitrarily by the air conditioner, it is possible to accurately measure the heat dissipation performance of the electronic device at the upper limit of the operating temperature range without having to put it in a constant temperature chamber as in the past. it can. Furthermore, since an exhaust air duct is connected to the exhaust port of the electronic device in which the sensor is disposed, the temperature can be accurately measured without being affected by the surrounding temperature.

Further, according to the present invention, the first and second air ducts have a flexible structure, and the connection of the first and second air ducts to the exhaust port and the intake port is made via a detachable adapter. Even if the shape and position of the air intake and exhaust ports change, the air duct can be freely deformed according to the position of the air exhaust port, so that it is possible to respond to various electronic devices simply by replacing the adapter. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for evaluating heat dissipation performance of an electronic device according to the present invention.

FIG. 2 is a configuration diagram of an apparatus for evaluating heat dissipation performance of electronic equipment according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electronic equipment, 2 ... Air conditioner, 3 ... Data processing part, 4
... Exhaust port, 5 ... Intake port, 6 ... First air duct, 7 ... Second air duct, 8a to 8c ... Sensor, 11 ... Electronic component, 21 ... Temperature controller, 31 ... Calculation unit, 33 ... Display unit,
41, 51 ... mounting brackets.

Claims (3)

(57) [Claims] A sensor for detecting the temperature, pressure and flow rate of air provided around an intake port and an exhaust port of an electronic device and electronic components in the electronic device; and a sensor connected to the exhaust port for detecting air inside the electronic device. A first air duct that exhausts air to the outside, a second air duct that is connected to the air intake port and sends air from the outside into the electronic device, and air controlled so that a selected one of the sensors has a designated temperature. An air conditioner that feeds the electronic device through the second air duct to the electronic device;
The temperature, pressure, and flow rate of the air controlled by the air conditioner are compared with the temperature, pressure, and flow rate of the air detected by the sensor at the exhaust port, and the calorific value of the electronic device, the required flow rate, and the pressure loss in the electronic device are determined. A heat radiation performance evaluation device for an electronic device, comprising: a calculation unit that calculates, compares a calculation result with flow rate-pressure loss data of various blowers stored in advance, and selects an optimal blower. 2. The heat radiation performance evaluation device for an electronic device according to claim 1, further comprising a display unit for displaying a result selected by said calculation unit. 3. An apparatus for evaluating heat radiation performance of an electronic device according to claim 1, wherein said first and second air ducts have a flexible structure, and the first and second air ducts have an exhaust port and an intake port. An apparatus for evaluating heat dissipation performance of electronic equipment, wherein connection is made via a detachable adapter.