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Anti-no-load microwave oven and detection method thereof

A detection method and microwave oven technology, which is applied in the field of microwave ovens, can solve problems such as shortening the service life of microwave ovens, slow response speed of thermostats, and damage to parts, and achieve the effects of simple structure and detection methods, rigorous processes, and avoiding damage

Active Publication Date: 2016-03-23
WHIRLPOOL CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microwave ovens working under no-load conditions will cause damage to components and shorten the service life of the microwave oven
The existing anti-microwave oven no-load device is to install a thermostat on the top of the microwave oven cavity, but the current thermostat responds slowly, and when an abnormal temperature is sensed, parts such as magnetrons and choke coils have been damaged

Method used

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  • Anti-no-load microwave oven and detection method thereof
  • Anti-no-load microwave oven and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 , figure 2 A no-load proof microwave oven is shown, including a furnace chamber 2 and a temperature sensing device 1 fixed on the top of the furnace chamber 2, and the temperature sensing device 1 includes a metal probe 5 and a thermistor 3 disposed in the metal probe 5 . Because the thermal conductivity of the metal probe is good, it can transmit the temperature change in the microwave oven cavity to the thermistor in time. Because the thermistor has high sensitivity, wide operating temperature range, and good stability, it can timely and accurately feed back temperature information to the microwave oven control system. By setting the corresponding resistance value range in the microwave oven control system, it can be judged whether the microwave oven is empty within 30 seconds after starting. If it is detected that the resistance value fed back by the thermistor is not within the normal range, it is judged that the microwave oven is empty, and the...

Embodiment 2

[0043] The high-temperature-resistant material used for the metal probe is Kovar alloy, and the others are the same as in Embodiment 1. Because the metal probe is made of stainless steel alloy with high temperature resistance and excellent thermal conductivity, the heat conduction time is very short, and the temperature information can be transmitted to the thermistor in time.

[0044] To sum up, the temperature sensing device adopted in the present invention first uses a metal probe to sense and conduct temperature, then uses a thermistor to receive the temperature information from the metal probe, and uploads the information to the microwave oven control system in time through the resistance value. Then the microwave oven control system judges the no-load state according to the data detected by the thermistor. Because the metal probe is made of stainless steel alloy or Kovar alloy with high temperature resistance and excellent thermal conductivity, the heat conduction time i...

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Abstract

The invention relates to an idle load prevention microwave oven and an idle load detection method thereof. The idle load prevention microwave oven comprises an oven chamber and a temperature sensing device fixedly arranged at the top inside the oven chamber, wherein the temperature sensing device comprises a metal probe and a thermistor arranged in the metal probe, the metal probe is fixedly arranged at the top inside the oven chamber by a fixing plate and is closely matched with the fixing plate, the fixing plate is fixedly connected with the top part inside the oven chamber by a screw, one end of the thermistor is fixedly arranged in the metal probe, the other end of the thermistor is connected with a control system, the metal probe is made of high-temperature-resisting materials (stainless steel alloy or kovar alloy). The detection method provided by the invention has a precise process and can accurately judge the running process of the microwave oven; according to the microwave oven and the method, the structure is simple and the temperature change inside the idle load oven chamber can be detected in a short time, and a power supply is cut off timely, so that microwave oven parts can be prevented from damaged.

Description

technical field [0001] The invention relates to the technical field of microwave ovens, in particular to an anti-empty microwave oven and a detection method thereof. Background technique [0002] With the improvement of living standards, microwave ovens are used more and more in daily life. When people use the microwave oven, they often forget to put in food and then start the empty microwave oven to run. Working in the microwave oven without load will cause damage to components and shorten the service life of the microwave oven. The existing anti-microwave oven no-load device is to install a thermostat on the top of the microwave oven cavity, but the current thermostat responds slowly, and when an abnormal temperature is sensed, components such as magnetrons and choke coils have been damaged. Contents of the invention [0003] The object of the present invention is to provide a microwave oven no-load prevention device and its detection method. The microwave oven equippe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C7/02F24C7/08
Inventor 金友华徐向前张磊姜桂陈喜刘庆华
Owner WHIRLPOOL CHINA