Electric stove

Abstract

The invention relates to an electric furnace which employs an electric hot tray as a heating element, and the electric furnace comprises a casing stand, the electric hot tray and a control circuit board. The control circuit board is respectively connected with power supply, a control panel and the electric hot tray, and the casing stand is formed by an upper casing and a lower casing. A cavity for containing the electric hot tray is arranged on the upper casing, the electric hot tray is supported by knob insulators and firmly fixed on the lower casing through screws and nuts, an isolation groove is arranged between the electric hot tray and the wall portion of the cavity of the upper casing, and the isolation groove is communicated with vent holes arranged on the lower casing. When the power of the electric hot tray is on for heating, temperature inside the furnace is relatively high, and hot air naturally ascends while cold air supplements from the vent holes at the bottom of the furnace to form convective flowing, thereby largely reducing the temperature inside the furnace, guaranteeing the normal operation of an electronic control circuit and realizing automation of high power conventional electric furnaces.

Description

Technical field: [0001] The invention relates to an electric furnace, in particular to an electric furnace using an electric heating plate as a heating element. Background technique: [0002] Traditional electric furnaces use electric heating plates as heating elements, and traditional electric furnaces with high power above 1000W are difficult to automate. The main reason is that the temperature in the furnace is too high. After the electric heating plate is connected to the power supply, it continuously emits heat. The heat emitted by the electric heating plate is not only transmitted to the heated container on the electric heating plate, but also transfers heat to the inside of the furnace body through the air. The normal working temperature of the furnace surface is 500°C-600°C (when using a ceramic pot or glass pot), the temperature in the furnace is as high as 400°C-500°C, the operating temperature of civil electronic devices is 85°C, and the thermal deformation temper...

AI Technical Summary

Problems solved by technology

[0002] Traditional electric furnaces use electric heating plates as heating elements, and traditional electric furnaces with high power above 1000W are difficult to automate

The main reason is that the temperature in the furnace is too high. After the electric heating plate is connected to the power supply, it continuously emits heat. The heat emitted by the electric heating plate is not only transmitted to the heated container on the electric heating plate, but also transfers heat to the inside of the furnace body through the air. The normal working temperature of the furnace surface is 500°C-600°C (when using a ceramic pot or glass pot), the temperature in the furnace is as high as 400°C-500°C, the operating temperature of civil electronic devices is 85°C, and the thermal deformation temperature of ordinary plastic is about 100°C. The difference is too far. Any automatic device, Any plastic can't bear it. The current high-power traditional electric furnaces all use iron shells as the furnace base, which are manually operated and used without automation.

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