CN2462304Y

CN2462304Y - Air/gas electric heater

Info

Publication number: CN2462304Y
Application number: CN 00261388
Authority: CN
Inventors: 李大明; 王保明; 贾洮安; 吉军
Original assignee: XI'AN UNIONFILTER PURIFICATION ENGINEERING Co Ltd
Current assignee: XI'AN UNIONFILTER PURIFICATION ENGINEERING Co Ltd
Priority date: 2000-12-12
Filing date: 2000-12-12
Publication date: 2001-11-28
Anticipated expiration: 2010-12-12

Abstract

The utility model relates to an air/gas electric heater, which comprises a heating cavity which is composed of an outer shell and a sealing head which is arranged on end of the heating cavity. A sealing end cover is arranged on the other end of the heating cavity. An electric heating component which is fixed on the sealing end cover is arranged in the outer shell. A gas inlet and a gas outlet are also arranged on the outer shell. An inner shell which divides the heating cavity into an inner heating cavity and an outer heating cavity is arranged in the heating cavity. The electric heating component is arranged in the inner heating cavity. The gas inlet is communicated with the outer heating cavity. The gas outlet is communicated with the inner heating cavity. The inner heating cavity are communicated with the outer heating cavity through the inner heating cavity to form a secondary heating loop. The utility model has the advantages of small size, high heat exchanging efficiency, and low energy consumption.

Description

The air electric heater

The utility model relates to a kind of air electric heater.

Fig. 1 is the structure principle chart of present modal air electric heater.It is that electrical heating elements 3 directly is positioned in the canister, and this container is surrounded by shell body 2 and outer end socket 1, constitutes heating chamber 9, has air inlet 8 and gas outlet 10 on the shell body 2, and gas flow direction is low in and high out or high in and low out.Gas flows through the surface of electrical heating elements 3 and is heated to uniform temperature with certain speed.Though this design is simple in structure, processing and manufacturing is relatively easy, has following distinct disadvantage:

1, heat exchange area is little, efficient is low, energy consumption is big.Gas is entered in the electric heater by

air inlet

8,10 discharges from the gas outlet behind the thermal radiation on dependence metal shell surface and the electrical heating elements 3 direct heat convections.Only utilize a straight section of 10 of air inlet 8 and gas outlets to carry out heat exchange, heat exchange area is extremely limited in time, do not make full use of the heat that the high-temperature metal housing distributes, so heat exchange efficiency is low, and thermal waste is big;

2, small product size is big.Because heat exchange area is little, efficient is low, reaches higher temperature in order to make gas, then must strengthen heat exchange area, and the measure of taking has only the power that strengthens electric heater volume and electrical heating elements 3, thereby the volume of product is increased, and power consumption strengthens;

3, require high to heater housing material, processing technology.Because the width of cloth of heater case bulk absorption electrical heating elements 3 is penetrated heat, casing surface temperature is very high, and when being heated gas and having certain pressure, rotatable heater housing must press high temperature pressure vessel design, manufacturing.Therefore strict to material and processing technology, cost is higher;

4, because the rotatable heater housing surface temperature is very high, so shell must apply insulation material to reduce heat loss and to prevent that the operator from scalding, and manufacturing cost is increased.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of volume little, the heat exchanger effectiveness height, and low air electric heater consumes energy.

The purpose of this utility model can reach by following measure:

A kind of air electric heater, comprise heating chamber 9, it is made of shell body 2 and the end socket of being located at an end, the other end of described heating chamber 9 is provided with end cover 5, be provided with the electrical heating elements 3 that is fixed on the end cover 5 in this shell body 2, also be provided with air inlet 8 and gas outlet 10 on the described shell body 2, its special character is: be provided with in the described heating chamber 9 it is divided in,

outer heating chamber

13,12 inner housing 11, described electrical heating elements 3 is arranged in the interior heating chamber 13, described air inlet 8 is communicated with outer heating chamber 12, gas outlet 10 is communicated with interior heating chamber 13, described in,

outer heating chamber

13,12 by interior heating chamber inlet 14 connection formation post bake loops.

The end socket of above-mentioned inside and

outside heating chamber

13,12 can be made of outer end socket 1.

The end socket of above-mentioned inside and

outside heating chamber

13,12 can be made of interior end socket 15 and outer end socket 1 respectively.

The accompanying drawing drawing is described as follows:

Fig. 1 is and the corresponding prior art constructions schematic diagram of the utility model;

Fig. 2,3 is respectively the structural representation that this reality has novel two embodiment.

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 2, inside and

outside heating chamber

13,12 of the present utility model is made of inside and

outside housing

11,2 respectively, forms the post bake loop.Easy for processing, an end of inside and

outside heating chamber

13,12 can be isolated by outer end socket 1 sealing, and its other end is connected by interior heating chamber inlet 14.Air inlet 8 all is arranged at and interior heating chamber inlet 14 other ends that deviate from mutually with gas outlet 10, and air inlet 8 is communicated with outer heating chamber 12, and gas outlet 10 is communicated with interior heating chamber 13.In the heating chamber 13, its binding post was fixed on the end cover 5 in electrical heating elements 3 was arranged at, and the binding post outside can be provided with protective cover 6.End cover 5 is by flange 4 and shell body 2 fit sealings.For ease of installing, end cover 5 can adopt blind flange.Protective cover 6 is provided with the wire hole 7 of electrical heating elements 3 connecting lines.During work, gas to be heated is entered in it by the air inlet 8 of outer heating chamber 12 1 ends, carries out a heat exchange with inner housing 11; Then, heating chamber 13 in the interior heating chamber inlet 14 of the other end enters, electrical heating elements 3 carries out post bake to it; At last, being heated gas is discharged by gas outlet 10.For further reducing heat loss, the end socket of inside and

outside heating chamber

13,12 also can be provided with respectively, and referring to Fig. 3, outer heating chamber 12 is by outer end socket 1 sealing, and interior heating chamber 13 is by interior end socket 15 sealings.

The utility model compared with prior art has following advantage:

1, heat exchange area is big, and is energy-efficient. The utility model arranges an inner casing on the prior art basis Body makes gas become double-flow by original single process, and heat exchange area increases and is twice. Inner housing can fully be inhaled Receive the electrical heating elements width of cloth and penetrate heat, both strengthened the heat convection of inner housing, make again inner housing also become another Heating element heater carries out preheating to gas, and heat exchange efficiency obviously improves, and has also greatly reduced thermal loss;

2, owing to adopting twice heat exchange structure of double-flow, so that the electric heater overall volume dwindles 1/3rd More than;

3, owing to adopt the inner and outer shell structure, the electrical heating elements width of cloth is penetrated the heat overwhelming majority and is absorbed by inner housing, And the shell body temperature is relatively very low, so shell can be by cold chamber design, selection, manufacturing;

4, because skin temperature is not high, need not to adopt Insulation, thereby can reduce manufacturing cost.

Claims

1, a kind of air electric heater, comprise heating chamber (9), it is made of shell body (2) and the end socket of being located at an end, the other end of described heating chamber (9) is provided with end cover (5), be provided with the electrical heating elements (3) that is fixed on the end cover (5) in this shell body (2), also be provided with air inlet (8) and gas outlet (10) on the described shell body (2), it is characterized in that: be provided with in the described heating chamber (9) it is divided in, outer heating chamber (13), (12) inner housing (11), described electrical heating elements (3) is arranged in the interior heating chamber (13), described air inlet (8) is communicated with outer heating chamber (12), gas outlet (10) is communicated with interior heating chamber (13), described in, outer heating chamber (13), (12) be communicated with formation post bake loop by interior heating chamber inlet (14).

2, air electric heater as claimed in claim 1 is characterized in that: the end socket of described inside and outside heating chamber (13), (12) is made of outer end socket (1).

3, air electric heater as claimed in claim 1 is characterized in that: the end socket of described inside and outside heating chamber (13), (12) is made of interior end socket (15) and outer end socket (1) respectively.