CN2235582Y - Convection current type electric water heater - Google Patents

Abstract

The utility model relates to a convection type electric water heater, which comprises an annular metal cylinder and a comb-shaped ceramic frame which is wound with an electric heating wire and is arranged in the metal cylinder. A sleeve cylinder is added out of the metal cylinder. One end of a connecting piece is added with a sealing gasket and is connected with the metal cylinder by a fastener. The other end of the connecting piece is added with a sealing gasket and is connected with the bottom of the utility model by a fastener. The two ends of the electric heating wire are sheathed with a porcelain tube and are led out from the center hole of the connecting piece. The utility model has the advantages of shortened heating time, improved heating efficiency, and saving energy compared with tubular electric heaters with same power.

Description

The convection type electric heater

The utility model belongs to the electric heater field.

The electrical heating elements of electric heater is all made tubulose at present, though easy to use, to install simply, the electrothermal tube area of dissipation is little, and the thermal efficiency is low, and the life-span is short.

The utility model purpose is: design a kind of drum type brake electric heater.Strengthen the contact area of electrical heating elements and water; In the heating process in container, quicken flowing and heat exchange of water, improve the efficiency of heating surface.

The technical solution of the utility model is: form metallic cylinder by inner core, urceolus, annular loam cake and lower cover, heating wire and is installed in the metallic cylinder on the pectination ceramic skeleton, and is with connector, seal washer and securing member that it is fastening; Cylinder adds a sleeve; Utilize connector, seal washer and securing member to be connected again with container bottom; The heating wire two ends put porcelain tube and draw from the connector centre bore.Inner core omits height a bit than urceolus, and the upper end bore dwindles, thereby has increased the contact area of electric heater and water, and can quicken flowing of water.Because cylinder adds a sleeve, decide according to electric heater capacity in gap between the two.During heating, the water heating in the gap is fast, and the temperature height with the bigger temperature difference of water existence on every side, thereby impels flowing of the interior water of container, quickens circulating effect.

Fig. 1 is the utility model structure and partial sectional view.

Fig. 2 is the schematic diagram that annular pectination ceramic skeleton launches back and heating wire winding.

Be described further below in conjunction with accompanying drawing.Adopt slight oxidation flame solder technology, with inner core (1), urceolus (3), circular loam cake (2) and the lower cover (11) of red copper material forming when making cylinder, heating wire (6) parts that should fully take into account on the ceramic skeleton (5) are easy for installation, and sealing is reliable.Heating wire (6) is good with thermal conductivity on every side, and the inserts of insulation (7) fills up as magnesia powder etc.Prevent that heating wire from contacting with metallic cylinder.Ceramic skeleton is that two semicircle shapes of once-forming combine, and is with connector (9), seal washer (10), (12) and securing member (13) that it is fastening, guarantees the electric heater insulation, sealing and safe and reliable.Connecting piece (9) is two, and the other end is connected with container with seal washer (14), securing member (15).The heating wire two ends put porcelain tube (8) and draw from the connector centre bore, and are connected with power supply terminal.Inner/outer tube diameter and height are decided according to the power of electric heater, increase height as far as possible.Gap between sleeve and the cylinder, as far as possible littler according to the power difference, get final product with several means of spot welds are fixing between the two.Support member (16) is two, is welded on the urceolus, and height is identical with securing member (15) thickness, and making between heater base and the container bottom has certain distance.

The utility model can be installed in the kettle bottom, changes connecting piece shape and position, Also can be installed on the water tumbler wall and cover. Compare contracting with the tube type electric heater of equal-wattage Short heat time heating time, improve the efficiency of heating surface, energy savings.

Claims (3)

1. a convection type electric heater is characterized in that: it comprises the cylinder that inner core (1), urceolus (3), circular loam cake (2) and lower cover (11) are formed, heating wire (6) is on pectination ceramic skeleton (5), and be installed in the metallic cylinder, be fixed with connector (9), seal washer (10), (12) and securing member (13); Cylinder adds a sleeve (4); Utilize connector (9), seal washer (14) and securing member (15) to be connected again with container bottom; The heating wire two ends put porcelain tube (8) and draw from the connector centre bore.

2. convection type electric heater according to claim 1 is characterized in that: by the circular cylindrical shell that the red copper material is made, inner core (1) is than urceolus (3) height, and the upper end bore dwindles.

3. convection type electric heater according to claim 1 is characterized in that: the ceramic skeleton that twines heating wire is housed in the cylinder, and good with thermal conductivity, the packing material of insulation (7) fills up.

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