Novel air flue type PTC heater

Abstract

The invention provides a novel air flue type PTC heater which comprises a square air pipe. A fan, a filter area and at least one heating area are sequentially arranged in the square air pipe from leftto right. The filter area comprises a primary filter net plate and a secondary filter net plate which are vertically arranged, the heating area comprises a first PTC porous heating plate and a secondPTC porous heating plate which are arranged in a left-right mode, the top of the first PTC porous heating plate is inclined rightwards, a gap is reserved between the top and the inner wall of the square air pipe, the bottom of the second PTC porous heating plate is inclined rightwards, and a gap is reserved between the bottom and the inner wall of the square air pipe. The novel air flue type PTCheater has the advantages that gas sequentially passes through the filter area and the heating area from left to right under the effect of the fan, the gas is filtered by the filter area before reaching the heating area, accordingly, dust and steam in gas can be effectively filtered, dust accumulation and dirt forming are avoided on the inner wall of the square air pipe and the PTC porous heatingplates in the heating area, influences of dust accumulation on heating efficiency are reduced, and the dust removal frequency and the maintenance cost are reduced.

Description

technical field [0001] The invention relates to the technical field of PTC heaters, in particular to a novel air duct type PTC heater. Background technique [0002] PTC heater adopts PTC ceramic heating element. This type of PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency. It is an electric heater with automatic constant temperature and power saving. The outstanding feature lies in the safety performance. Under any application conditions, there will be no "redness" phenomenon on the surface of the electric heating tube heater, which will cause burns, fire and other safety hazards. [0003] At present, the existing PTC heaters used for air duct heating are traditional in shape, most of which are straight, with low heating efficiency and difficult replacement and maintenance. At the same time, due to the lack of effective filtration of dust and water vapor in the gas, PTC heaters Dust accumulates on the surface, and due to ...

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Problems solved by technology

[0003] At present, the existing PTC heaters used for air duct heating are traditional in shape, most of which are straight, with low heating efficiency and difficult replacement and maintenance. At the same time, due to the lack of effective filtration of dust and water vapor in the gas, PTC heaters Dust accumulates on the surface, and due to water vapor, dirt that is difficult to remove has been formed for a long time, which greatly affects the heating efficiency of the PTC heater, increases the difficulty of cleaning and maintenance of the PTC heater, and reduces the service life

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