Improved method for measuring heating uniformity of microwave oven

Abstract

The invention discloses an improved method for measuring heating uniformity of a microwave oven. The improved method comprises steps that, when measurement is started, the microwave oven and an experimental vessel are at room temperatures, and the initial temperature of water is set to 10 DEG C + / -1 DEG C; the water is added to the experimental vessel and is uniformly stirred, and the experimental vessel is placed at the center of a cooking area of the microwave oven; a thermocouple test tool is slowly placed into the experimental vessel, when the temperature is stable, the initial water temperature is read, and the thermocouple test tool is taken out; the microwave oven is started, the microwave oven is made to work for a period of time with output energy equivalent to 150kWs; a power supply is cut off, an oven door is opened, under the condition of not moving the experimental vessel, the thermocouple test tool is again slowly placed into the vessel, and when the temperature to be measured is stable, a final water temperature is read; and heating uniformity of the microwave oven is calculated via use of a formula. The improved method is advantageous in that, ten test points of a space are selected for measurement, and measure accuracy is high.

Description

technical field [0001] The invention relates to an improved method for measuring the heating uniformity of a microwave oven. Background technique [0002] The current "Limitable Values ​​of Energy Efficiency and Energy Efficiency Grades for Household and Similar Microwave Ovens" require that the heating uniformity of a microwave oven with a turntable is not less than 70%, and that of a microwave oven without a turntable is not less than 60%. testing method". However, in the actual test process, due to the random factors of test equipment and personnel operation, the repeatability of the test results is very poor. As a result, this test item was deleted in the new version of "Energy Efficiency Allowable Values ​​and Energy Efficiency Levels of Household and Similar Microwave Ovens" submitted for review in 2015. [0003] There are three main reasons for the poor repeatability of the test. One is that the consistency of the five glass cups used in the test is not good. Manua...

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Problems solved by technology

[0003] There are three main reasons for the poor repeatability of the test. One is that the consistency of the five glass cups used in the test is not good. Manually stir the water in the cup evenly and measure the temperature. It is required to complete the measurement within 30s, which brings a lot of random errors during the stirring process. Uniformity, does not take into account the spatial distribution

In addition, for microwave ovens with irregular cavity, how to select five test points is also a problem, and the methods of each laboratory are not uniform

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