公开(公告)号：US3760791A

公开(公告)日：1973-09-25

申请号：US3760791D

申请日：1972-02-24

申请人： BEATRICE FOODS CO

发明人： HAUN J ,  HENSEL D ,  SCHLIES E ,  WEAVER H

IPC分类号： B22C9/12 ,  F24H3/10

CPC分类号： B22C9/123

摘要： The heater includes a heat exchanger, a pressure control system and a heater. Pressurized gas (e.g. compressed air), the flow of which is regulated and controlled by the pressure control system, flows through an elongated, annular passage inside the heat exchanger between an elongated, tubular shell and a heating member which is heated by the heater (e.g. a concentric, elongated tubular flue through which hot combustion gases from a gas burner flow). The gas is heated as it flows in contact with the heated surface of the heating member. The pressure control system automatically sequences the regulations of the flow of pressurized gas introduced into the heat exchanger so that the flow of heated gas delivered by the heater is initially at a relatively low volume and, after a predetermined time, is at a higher volume. A low volume bleed, continuously flowing through the annular passage while the heater is operating, prevents overheating of the heating member and keeps the heat exchanger and hardware connected thereto warm between heating cycles, thereby minimizing warm up time at the start of a heating cycle. The heater is particularly adaptable for use in curing cores or molds made from moistened sand and a thermosetting binder material where rapid heat curing is desired, without the eroding effect of an initial high pressure gas flowing therethrough prior to curing of the binder.

摘要翻译： 加热器包括热交换器，压力控制系统和加热器。 通过压力控制系统调节和控制其流量的加压气体（例如压缩空气）流过热交换器内的细长的环形通道，在细长的管状壳体和由加热器加热的加热构件之间 例如同心的，细长的管状烟道，来自气体燃烧器的热燃气体通过该烟道流过）。 气体在与加热构件的加热表面接触时流动加热。