Abstract: Disclosed is a pressure detection device configured to detect pressure intensity in a sealed cavity of a cooking appliance, comprising: a pressure sensing assembly comprising a fixed part and a movable part, in which the movable part moves relative to the fixed part when a pressure change in the sealed cavity is sensed, so as to cause a sensing parameter of the pressure sensing assembly to change; and a detecting unit connecting with the pressure sensing assembly and can acquire the pressure intensity in the sealed cavity according to a current sensing parameter of the pressure sensing assembly. The pressure sensing assembly further comprises a flexible sealing sheet disposed at an open end of the body portion to seal the open end, and configured to be deformed towards the pressure chamber when an air pressure in the sealed cavity is greater than an air pressure in the pressure chamber.

Abstract: Disclosed is a pressure detection device (10), wherein the pressure detection device (10) is configured to detect the pressure in a sealed cavity. The pressure detection device (10) further comprises: a pressure sensing assembly (I), wherein the pressure sensing assembly (I) comprises a fixed part (14) and a movable part (13), the movable part (13) moves relative to the fixed part (14) when a change of the pressure in the sealed cavity is sensed, so as to change a sensing parameter of the pressure sensing assembly (I); and a detection unit (II), wherein the detection unit (II) is connected to the pressure sensing assembly (I), and the detection unit (II) is used for obtaining the pressure in the sealed cavity according to a current sensing parameter of the pressure sensing assembly (I).

Abstract: An infrared detecting device includes a substrate and a thermal photo detecting element. The substrate includes a concave portion, and a frame portion positioned on the periphery of the concave portion. The thermal photo detecting element includes leg portions and a detecting portion. The leg portions are connected on the frame portion so that the detecting portion is positioned above the concave portion. The thermal photo detecting element includes a first electrode layer disposed on the substrate, a detecting layer disposed on the first electrode layer, and a second electrode layer disposed on the detecting layer. The linear thermal expansion coefficient of the first electrode layer is larger than the linear thermal expansion coefficient of the substrate. The linear thermal expansion coefficient of the substrate is larger than the linear thermal expansion coefficient of the detecting layer.