Heat source simulation evaluation system

Abstract

A heat source simulation evaluation system includes a chassis under test (DUT), at least one positive temperature coefficient (PTC) heat source module, a regulated power supply module, a fan module, two airflow temperature sensing modules, and a fan control module. The DUT has an accommodating space. The PTC heat source module is disposed in the accommodating space to generate heat. The regulated power supply module supplies power to the PTC heat source module, enabling it to operate at its operating power. The fan module is disposed in the accommodating space to generate cooling airflow, which flows through the PTC heat source module to absorb heat. The airflow temperature sensing modules sense the inlet and outlet air temperatures respectively to calculate the temperature difference. The fan control module adjusts the fan speed, thereby adjusting the temperature difference. At least one of the temperature difference and the operating power is adjusted to evaluate the thermal management performance of the DUT.

Claims

1. A heat source simulation and evaluation system, comprising: a chassis under test, having an accommodating space and an air inlet and an air outlet communicating with the accommodating space; at least one positive temperature coefficient (PTC) heat source module disposed in the accommodating space for generating heat energy to simulate a heat source; a voltage-regulating power supply module electrically connected to the PTC heat source module for supplying a power supply voltage to the PTC heat source module within a voltage regulation range, causing the PTC heat source module to operate at an operating power within a power regulation range; and a fan module disposed in the accommodating space for generating a cooling airflow from the air inlet to the air outlet, wherein the cooling airflow flows through the PTC heat source module to absorb the heat energy. A dual airflow temperature sensing module is respectively installed near the air inlet and the air outlet to sense an inlet air temperature and an outlet air temperature, so as to calculate a temperature difference between the outlet air temperature and the inlet air temperature; and a fan control module is electrically connected to the fan module and the dual airflow temperature sensing module to adjust one of the fan module speeds, thereby adjusting the temperature difference; wherein. The temperature difference and the operating power are at least one of the adjusted values ​​used to evaluate the thermal management performance of one of the chassis under test.

2. The heat source simulation and evaluation system as described in claim 1, wherein, The two airflow temperature sensing modules are an inlet air temperature sensing module and an outlet air temperature sensing module. The inlet air temperature sensing module is located near the air inlet and is used to sense the inlet air temperature. The outlet air temperature sensing module is located near the air outlet and is used to sense the outlet air temperature.

3. The heat source simulation and evaluation system as described in claim 1, wherein, The accommodating space contains a plurality of the aforementioned positive temperature coefficient heat source modules connected in parallel with each other.

4. The heat source simulation and evaluation system as described in claim 1, wherein, The voltage regulating power supply module is electrically connected to a mains power source to convert the mains voltage into the supply voltage.

5. The heat source simulation and evaluation system as described in claim 1 further includes a power supply protection module, which is electrically connected between the positive temperature coefficient heat source module and the voltage regulating power supply module, for controlled disconnection of the power supply voltage.

6. The heat source simulation and evaluation system as described in claim 5, wherein, The power supply protection module includes an overcurrent protection unit, which is used to trigger the power supply protection module to cut off the power supply voltage when the power supply current corresponding to the power supply voltage exceeds a current threshold.

7. The heat source simulation and evaluation system as described in claim 5 further includes a heat source temperature sensing module, which is thermally connected to the positive temperature coefficient heat source module and electrically connected to the power supply protection module, for sensing and transmitting the heat source temperature of the positive temperature coefficient heat source module, and the power supply protection module further includes an over-temperature protection unit, which is used to trigger the power supply protection module to cut off the power supply voltage when the heat source temperature exceeds a temperature threshold.

8. The heat source simulation and evaluation system as described in claim 1, wherein, The fan control module switches between a manual mode and an automatic mode. In the manual mode, the fan speed can be manually adjusted, and in the automatic mode, the fan speed can be automatically adjusted based on the temperature difference.

9. The heat source simulation and evaluation system as described in claim 1 further includes a power display module electrically connected between the positive temperature coefficient heat source module and the fan control module to display the operating power and send the operating power to the fan control module, so that the fan control module adjusts the speed of the fan module according to at least one of the operating power and the temperature difference.

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