Fast air heater

Abstract

The invention discloses a quick air heater, mechanical parts thereof adopt waterproof and high-temperature resistant materials, and a core heating part adopts electrothermal film heating pipes, thus achieving ultrahigh electrothermal transfer efficiency which is over 95 percent and ultra-quick response; the electrothermal film heating pipes are distributed in the form of an isoperimetric polygon,thus ensuring even air heating; the quick air heater takes the shape of a cylinder with two thinner ends and a thicker middle part integrally and consists of three parts which are an expanding section, a heating section and a shrinking section, the expanding section and the shrinking section are approximately completely symmetric relative to the midline of the heating section in structure; the design that the whole quick air heater is divided into three sections takes consideration that the electrothermal film heating pipes and adapter sleeves thereof need to be placed in the heating section and both parts occupy certain cross section areas. In order to reduce pressure reduction loss and optimally keep flow speed unchanged in a process that airflow passes through the heater, the core heating part of the heating section adopts the ultra-thin electrothermal film heating pipes, the axial direction of which is the same as the airflow direction, and the effective cross section area of highwet air that passes through the heating section is ensured to be approximately the same as the cross section area of the original pipe.

Description

1. Technical field [0001] The invention relates to a rapid air heater, which is suitable for a wide range of air humidity (5%RH-100%RH), and has less pressure loss during the heating process. 2. Background technology [0002] The temperature, humidity and pressure comprehensive measurement and verification device is specially designed to provide a uniform temperature and humidity environment under a certain pressure. This uniform temperature and pressure environment is obtained by transforming the saturated moisture generated by the previous device through the principle of double temperature and double pressure. On the premise of ensuring the uniformity of the temperature and humidity field, it is a routine requirement for the verification test to rapidly increase the gas state from low temperature to high temperature. Therefore, it is necessary to properly rectify, uniformly heat, and quickly heat up the saturated moisture generated by the pre-stage device under the condit...

AI Technical Summary

Problems solved by technology

This kind of material is easy to age, easy to oxidize, has low electrothermal conversion efficiency, and slow temperature rise, which is not conducive to rapid temperature rise.

Second: Although the porous ceramic foam material has increased porosity compared with ordinary foam materials, the pressure drop loss is obviously still very large

Third: Foam materials generally have serious water absorption and cannot meet the heating requirements of high-humidity gas

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