RU2129339C1 - Home low-temperature electric heater for 220 v mains - Google Patents

Abstract

FIELD: electrical heating equipment for heating homes. SUBSTANCE: device is made from wood members and is equipped with vertical air convection channels in which heating elements are arranged (steel rope which is not bent to spiral). EFFECT: prevention of short circuits, use of natural air flow for cooling it down to fire-safe and comfort temperature. 2 dwg

Description

 The invention relates to household electric heating equipment for heating residential buildings.

 Widely used for temporary heating of residential premises are high-temperature domestic electric heaters with a voltage of 220 V. These are heaters on shadows and spiral. They are united by the high temperature of the heating of the working element. This leads to undesirable fire hazards and creates excessive dryness in the room, burns oxygen.

 Known electric heating device with heating resistance placed in the base of wood or wood (SU 11124 A, A. Schmidt-Predar, 09/30/29). The device of the above heater is as follows. The spiral of the heating element is surrounded by insulating layers tightly covering it, sandwiched between two wood plates. Wood must be fire resistant. Through holes are arranged in the wood to enhance heat transfer. The author suggests that the positive quality of the heater lies in its emitted soft heat passing through the tree, as opposed to hard radiation from metal heaters.

 The electric heater is quite complicated in execution.

 1. Wood should be fire resistant, but then it can be called wood with a big stretch.

 2. The electric spiral must be tightly screwed into the insulation and clamped in a tree. This design casts doubt on the efficiency of heat transfer.

 3. The author’s theory of soft heat is erroneous. A tree does not have such properties. It all depends on the surface temperature of the heater.

 4. As time has shown, the design of the prototype is not viable.

The invention consists in
1. in creating such a heater device, which would allow to heat the air of the premises, having a low temperature of the working element 60 - 80 ^o C, and therefore unable to heat the wood to a fire temperature (more than 300 ^o C),
2. in eliminating the possibility of short circuit of the working element, thereby guaranteeing the fire safety of the electric heater.

 This is achieved by means of vertical channels, in which a steel wire is laid, coated with varnish from corrosion, not rolled into a spiral. This completely eliminates the possibility of bridging. At the same time in the heating channels, located vertically, creates an air flow from the bottom up, as in a chimney. Intense heat exchange is created between the heater and the air. This allows you to transfer more heat to the air, and therefore increase the power of the electric heater.

 The prototype on the way of heat transfer from the spiral to the room air is insulation and wood, so heat transfer is difficult.

The drawing shows an electric heater in two projections:
1 - slats made of wood with a size of 10 x 20 mm,
2 - furniture wood slab,
3 - air channels
4 - steel, varnished wire,
5 - propia for laying wire,
6 - a device for suspending an electric heater on a wall of a room,
7 - lead wires 220 volts,
8 - bars of wood to create a gap between the wall and the electric heater.

 The electric heater is made of two sheets of furniture wood. Between them at a distance of 10 mm are fixed rails 1, forming air channels 3 for laying steel wire 4. Half cuts in the right places made cuts.

 Heater protection against erroneous supply of high voltage. In a porcelain tube, a fuse is attached to the wall of the outermost channel. In the other extreme channel, a porcelain sleeve is attached with a solder connection, lead wire and steel wire. Porcelain bushings protect against excessive heating of the tree in case of poor contact in the joints, which usually leads to excessive heating. For the suspension of the heater to the wall, fixtures are made 6. Between the heater and the wall, a gap is necessary for better heat transfer.

I make electric heaters with dimensions: height 1040 mm, length 1100 mm, thickness 30 mm. The number of air exchange channels 54 pcs. The working element is a steel wire with a diameter of 5 mm and a length of 56 meters, coated with varnish. Nominal heating temperature 60 ^o C. Power consumption 600 watts.

 The use of the heaters I offer opens the way to heating residential premises directly with electric energy. This can be an alternative to traditional water heating. Ecological parameters are the same. When using temperature electrical equipment, any room temperature can be automatically set, which creates great opportunities in saving energy and more favorable temperature conditions for humans. Significantly improved interior spaces.

 Will such heating be cheaper than water? Maybe yes. There are a lot of costs associated with water heating for the manufacture of metal structures for batteries, pipelines, stokers, their operation. A lot of losses in the transportation of heat in highways. And it is especially advantageous to use direct electric heating in small towns - in houses that are far from each other.

Claims (1)

 A 220 V household low-temperature electric heater made of wooden parts, characterized in that, in order to use it for constant heating of residential premises, it has vertical air channels designed for laying a working element in them (steel wire not twisted into a spiral) , which eliminates short circuits and uses the natural air flow to cool it to a fireproof and environmentally friendly temperature.