CN2314285Y

CN2314285Y - Circular electric water heater

Info

Publication number: CN2314285Y
Application number: CN 97244282
Authority: CN
Inventors: 黄文健; 崔锦新
Original assignee: DEPU ENTERPRISE Co Ltd FOSHAN CITY
Current assignee: DEPU ENTERPRISE Co Ltd FOSHAN CITY
Priority date: 1997-10-31
Filing date: 1997-10-31
Publication date: 1999-04-14
Anticipated expiration: 2007-10-31

Abstract

The utility model relates to a winding type electric water heater, comprising a water pipe, an electric heating pipe, a running water passage and a water outlet, wherein, the pipe wall of the electric heating pipe is a double-layer structure, and a heating element is arranged between an inner and an outer pipe walls; an outer water guiding pipe is sheathed outside the electric heating pipe, and the inner of the electric heating pipe is sheathed with an inner water guiding pipe; the double-layer cylinder-shaped running water passage is formed between each pipe walls. The water heater can enable water to surround and flow through the inner and the outer pipe walls of the electric heating pipe and to be sufficiently heated, and the utility model has the advantages of high heat transferring efficiency, high heating speed, resistance wire aging due to over-high temperature rise avoiding and long service life.

Description

The circulating type electric heater

The utility model relates to a kind of water heater that electric calorifie installation is arranged.

Existing electric heater generally adopts the electrothermal tube of built-in resistor silk as heater element.91206768), " domestic electric heating tubular type water heater " (patent No.: 91227639) or the like for example " pipeline electric heating hydrophone " (patent No.:, electrothermal tube in these electric heaters has only outer surface to contact with water, heat transfer area is little, causes that heat transfer efficiency is low, firing rate is slow.

The purpose of this utility model is to provide a kind of heat transfer efficiency height, the fast circulating type electric heater of firing rate.

The utility model is achieved in that this circulating type electric heater comprises water inlet pipe, electrothermal tube, flowing water passage and delivery port.The electrothermal tube tube wall is a double-decker, is provided with heater between inside and outside tube wall.Electrothermal tube is with outer aqueduct outward, is with interior aqueduct in the electrothermal tube.Constitute double-deck cylinder shape flowing water passage between outer aqueduct, electrothermal tube, the interior aqueduct tube wall.Its course of work is as follows, cold water from an end of electrothermal tube at first enter by the electrothermal tube outer wall and outside the cylinder shape flowing water passage that constitutes between the aqueduct inwall, heated first by the electrothermal tube outer tube wall.Water after the heating flows into by the second layer cylinder shape flowing water passage that constitutes between electrothermal tube inwall and the interior aqueduct outer wall again, is heated once more by the electrothermal tube inner tubal wall.Water after fully heating enters interior aqueduct, and water conservancy diversion is to delivery port thus.Because current around the inside and outside tube wall that flows through electrothermal tube, make current fully contact with the electrothermal tube surface, heat transfer area is big, heat exchange is abundant, thereby reaches heat transfer efficiency height, the fast purpose of firing rate.

The utility model compared with prior art has the following advantages: 1, the electrothermal tube heat exchange area than electric heater of the same type is big, make heat energy be fully used and also firing rate fast.2, the heat of resistance wire can pass to rapidly in the water, has avoided resistance wire too high and aging because of temperature rise, the water heater long service life.3, compact conformation, volume are little, can select the position of installing flexibly.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A portion view of Fig. 1;

Fig. 3 is the B-B cutaway view of Fig. 1.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing.

With reference to Fig. 1, Fig. 2, Fig. 3, this circulating type electric heater is made up of water inlet pipe 3, outer aqueduct 1, electrothermal tube 2, interior aqueduct 4.Electrothermal tube 2 is a double-decker, fills the heater that is made of resistance wire 10 and magnesia powder 11 between its inside and outside tube wall.Resistance wire 10 is spirally wound between the inside and outside tube wall around the axis of electrothermal tube 2, and magnesia powder 11 is filled between resistance wire 10 and the inside and outside tube wall and plays insulation, conductive force.Resistance wire 10 causes outside the outer aqueduct by insulation sleeve 6 and separation sleeve 5, connects with electrode 7.Electrothermal tube 2 end faces are respectively equipped with the

flow distribution plate

9 and 14 that is fixed on outer aqueduct inwall, and its periphery is fixed on the outer aqueduct inwall.The middle part of flow distribution plate 9 and periphery have outlet pass 16,13.The periphery of flow distribution plate 14 has outlet pass 16.

Outer aqueduct 1 two ends are respectively equipped with sealing plate 8,15.Water inlet pipe 3 is fixed on the sealing plate 15 and with outer aqueduct 1 and is communicated with.Interior aqueduct 4 one ends are fixed in the heat-generating pipe 2 by fixed head 12, and the other end is fixed on the sealing plate 8, and pass sealing plate 8 as delivery port.Current enter from water inlet pipe 3, the outlet pass 16 that passes flow distribution plate 14 peripheries enters the outer layer cylinder shape flowing water passage that is made of electrothermal tube 2 outer walls and outer aqueduct 1 inwall and once heats, enter the internal layer cylinder shape flowing water passage that is made of electrothermal tube 2 inwalls and interior aqueduct 4 outer walls through the outlet pass 16,13 of flow distribution plate 9 then and carry out post bake, last hot water flows out to delivery port by interior aqueduct 4.

Claims

1, a kind of circulating type electric heater, comprise water inlet pipe, electrothermal tube, flowing water passage and delivery port, the tube wall that it is characterized in that electrothermal tube (2) is a double-decker, heat generating member is arranged between the inside and outside tube wall, electrothermal tube (2) is outer to be with outer aqueduct (1), is with the double-deck cylinder shape flowing water passage of formation between the tube wall of interior aqueduct (4), outer aqueduct (1), electrothermal tube (2), interior aqueduct (4) in the electrothermal tube (2).

2, circulating type electric heater according to claim 1, the resistance wire (10) that it is characterized in that electrothermal tube (2) is spirally wound between its inside and outside tube wall around the axis of electrothermal tube (2), and magnesia powder (11) is filled between resistance wire (10) and the inside and outside tube wall.

3, circulating type electric heater according to claim 1, it is characterized in that electrothermal tube (2) end face is respectively equipped with flow distribution plate (9), (14), its periphery is fixed on outer aqueduct (1) inwall, the middle part of flow distribution plate (9) and periphery have outlet pass (16), (13), and the periphery of flow distribution plate (14) has outlet pass (16).

4, circulating type electric heater according to claim 1 is characterized in that outer aqueduct (1) two ends are respectively equipped with sealing plate (8), (15), and water inlet pipe (3) is fixed in sealing plate (15) and upward and with outer aqueduct (1) is communicated with.

5, circulating type electric heater according to claim 1 is characterized in that interior aqueduct (4) one ends are fixed in the electrothermal tube (2) by fixed head (12), and the other end is fixed on sealing plate (8) and goes up and pass outside the sealing plate (8).