Refrigerator

Abstract

Provided is a refrigerator including: a storage chamber having an infrared sensor which detects a surface temperature of food; and an adjacent storage chamber starting from the infrared sensor as a start point and adjacent to a projection plane of the detection plane of the infrared sensor. The storage chamber and the adjacent storage chamber are maintained in the same temperature band so as to improve the accuracy of a temperature detected upon door open and close. Moreover, by suppressing condensation and temperature fluctuations of a thermistor itself which may cause an erroneous detection, it is possible to stably detect the food temperature.

Description

technical field [0001] The present invention relates to a refrigerator using a non-contact sensor. Background technique [0002] In recent years, as demand for larger refrigerators has increased, refrigerators that have improved volumetric efficiency by reducing dead space and refrigerators that have various layouts from the viewpoint of usability are being sold. [0003] Among them, in refrigerators, in order to detect the temperature in the box, the temperature of the air in the box has been measured with a thermistor. The cooling amount is adjusted by measuring the temperature of the air in the box heated up by the influence of the hot food. However, in such a refrigerator, since the actual temperature of the food is not measured, it is not known whether the food can actually be cooled. Therefore, in order to cool the food, the food is cooled to the target temperature while cooling the surroundings, so there is a problem that it takes time to cool the food itself to the...

AI Technical Summary

Problems solved by technology

Specifically, the conventional switching chamber 9 is set at a freezing temperature, and when the door is opened to confirm only the food 21 stored in the switching chamber 9, the infrared sensor 28 mistakenly detects the temperature at which the food 21 has been put in, and starts cooling. , so the switching chamber 9 will be cooled excessively, and there is a problem that wasteful energy is required

[0016] In addition, in order to solve this problem, there is a method of providing a switch function for detecting the opening and closing of the door, but in the opening and closing of the door, it is necessary to perform interlocking control of the detection of the infrared sensor 28 and the switch control, which causes the complexity of the control, and there is a problem. Factors that may increase malfunctions

[0017] In addition, when water droplets adhere to the front end of the infrared sensor 28 due to condensation or the like, the water droplets are detected without detecting the food 21. Therefore, for example, in order to prevent the detection part of the sensor front end from Condensation also has a method of providing a shutter mechanism in the sensor part of the infrared sensor 28, but it becomes a complicated mechanical structure, which may increase the cause of malfunction

In particular, in the storage room of a low-temperature refrigerator, in such a complicated mechanical structure, problems such as a decrease in the reliability of the mechanical structure and a failure due to a decrease in the lubricity of the lubricating oil are likely to occur. Especially noticeable in rooms with freezing temperatures

In addition, there is a problem that the movement may be hindered due to condensation, freezing, frost, etc.

[0018] In addition, in the other conventional configuration of the above-mentioned Patent Document 2, although it has a certain effect, it is not enough for the market to pay attention to the global environment in recent years, that is, the demand for energy sav

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