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INVENTION
Russian Federation Patent RU2068626

ELECTRIC HEATER

ELECTRIC HEATER

Name of the inventor: Shulyat'ev Valeriy
The name of the patentee: Shulyat'ev Valeriy
Address for correspondence:
Starting date of the patent: 1994.06.27

Uses: electric heaters fluids, heating systems and appliances. The inventive electric heater comprises a protective casing, vertically mounted cylindrical housing with pipes of input and output media, a heating tape and insulating elements made of soft and bulky material, one superimposed on the outer surface of the housing, on top of it on the body wound heating tape, and over the heating tape imposed other electrically insulating element, indoor outside the protective cover. With heating tape wound into the body with a gap between turns, and with the formation of these gaps protrusions insulating element. The basalt wool used as insulating element. In the case of using an electric heater in the heater, inlet and outlet tubes connected to the medium tank of a closed volume, such as a radiator. This design implementation of the electric heater expands its technological capabilities and improves the efficiency and reliability of operation.

DESCRIPTION OF THE INVENTION

The invention relates to electrical heating, electric heaters and in particular to fluids, and can be used in heating systems and devices.

Known electric heater comprising a vessel for heated medium, made in the form of boiler, on the outer surface of which hugs the heating belt made of stranded wire nehromovoy woven fiber glass with electrically insulating [1]

However, such an electric construction can only be used for heating a small volume of the medium, because heating a large area wire receptacle, which consists of heating tape, to be already heated to a high temperature (700 800 o C), at which the metal changes its properties, becomes brittle and easily burns, leading to failure of the electric heater. In addition, fixing the heating tape on the surface of the vessel is difficult and short-lived, because for this purpose a glue that loses its properties at high temperatures, withers, whereby contact is broken with heating tapes and electric surface vessel fails.

Known electric fluids comprising a cylindrical housing with inlet and outlet nozzles of the medium, which is the vertical axis with clearance from one another are installed heating section formed in a laid electrical insulation between the under tape heating elements [2]

Known electric heater may be used for heating gases and dielectric fluids, but can not be used for water heating, ie. K. The heated medium is in direct contact with the heating element of the tape, and the water will be energized, and the water and the casing heater that lead to danger for the staff. Moreover, the heated environment has a destructive effect on the heating elements in contact with them, because It contains dust, dirt and sediments, which reduces the flow cross-section of the holes through which heated moves Wednesday. The heating element in this case loses its properties, leading to reduced heating efficiency.

To enhance technological capabilities, increasing the efficiency and reliability of the electric heater, comprising a vertically mounted cylindrical housing with pipes for input and output media, the spiral wound heat tape and electrical elements, between which is laid a heating tape, according to the invention it is provided with a protective casing, insulating elements are made of soft and bulky material and one applied to the outer surface of the housing, over the insulating element to the body is wound heating tape recessed in an electrically insulating member by interference fit, with gaps between the turns and with the formation of these gaps, protrusions insulating member, the top heating tape superimposed on the other electrically insulating housing element which is outside the protective cover.

In one embodiment, as an electrical element used basalt wool.

Alternatively, in the case of an electric heater in the heater with a circulating heating fluid connections for input and output media are connected to the capacity of the closed volume, such as a radiator.

Location heating tape on the outside surface of the housing of the electric heater expands its technological capabilities, as the fluid is not in contact with the heating element, which enables heat any fluid, including water and air, and use an electric heater in the home, such as a heater when connected to the radiator, and also as electroconvector.

Absence of contact of fluid with the heating element maintains the properties of the latter and thereby increases the heating efficiency, reliability and service life of the heater, to exclude the possibility of sedimentation therein dust and dirt contained in the fluid.

Execution of insulating elements made of soft and bulky material such as basalt wool, which withstands a high voltage, high-resistance enables the use of a heating tape. A wrapped heat tape on the body on top of the electrically insulating element with a hollow in it due to interference, with gaps between the turns and with the formation of these gaps protrusions electrically insulating element eliminates the possibility of a short circuit, ie. A. Heating tape is securely locked on the body due to the projections in the insulating element and at any temperature and shake exclude the possibility of extending the slack belt and clamping its coils together. Thus all of the above features of the invention of the object in its entirety given the opportunity to expand the technological capabilities and improve the efficiency and reliability of the electric heater.

In addition, the use as an electrical element basalt wool (TR-23448-92) Environmentally friendly material distinguishes the proposed electric other containing electrical elements on the basis of asbestos or plastic compounds.

1 shows an electric heater, a longitudinal section; in Figure 2 with the same connection to the radiator.

An electric heater comprises a vertically mounted cylindrical housing 1 with two nozzles for inlet and outlet for the medium 3, a heating tape 4, insulating elements 5 and 6 and 7. Electrical protective sleeve elements 5 and 6 are made of soft and bulky material basalt wool. Insulating element 5 is applied to the outer surface of the housing 1. Above the insulating element 5 on the housing 1 is wound heating tape 4 recessed in the electrically insulating element 5 by interference fit with gaps between the turns and with the formation of these gaps projections 8 insulating element 5. Above the heating tape 4, the housing 1 is superimposed electrically insulating member 6 which is closed outside the casing 7. Insulating element 6 protects the casing 7 and the voltage is simultaneously heat insulator.

If you use an electric heater in the heater system, (2) his pipes 2 and 3 are connected to the radiator 9.

ELECTRIC HEATER WORKS AS FOLLOWS

The voltage supplied from the power source to the heating tape 4. The electric current causes its highlands. Simultaneously, through the pipe 2 is supplied from the electric pump fluid to be heated. Uniform heating various fluids, such as liquids and gases, provided the entire housing area 1, heated by heating tape 4.

In the case of using an electric heater as a convector, it is set at a certain distance from the floor with open nozzles 2 and 3. The air in contact with the inner surface of the body 1 is heated and rises. In place of the heated air exiting the nozzle 3, from the bottom through a nozzle 2 into the cold air. This creates a natural circulation of air.

In the case of using an electric heater in the heater system (Fig. 2) two tubes 3 and the casing 1 are connected with the radiator 9. The housing 1 through the opening at the top (not shown) is poured the liquid, for example water, after which the hole stoppered. The ends of the heating tape 4 through a wire connected to a mains socket. An electrical circuit, the water contained in the body 1 is heated to form steam mixture, the lighter portion which rises up along the body 1 through the pipe 3 and fills the radiator 9, giving heat to the environment. After cooling steam mixture back into the housing 1 through the inlet 2. This ensures the natural circulation of steam-water mixture in the radiator system.

INFORMATION SOURCES

1. Ed. St. USSR N 674743, cl. F 24 H 1/18;

2. Auto. St. N 1760651, cl. H 05 B 3/20 (prototype).

CLAIM

1. An electric heater comprising a housing with connections for inlet and outlet of the working medium on the outer surface of which electrical insulation between the two layers, inner and outer, helically wound flexible heating element disposed in the recesses inner insulating layer with gaps between the turns, characterized in that it provided with a casing covering the outer electrically insulating layer, the heating element is a high-resistance tape and insulating layers are made of soft and bulky material such as basalt wool, and the tape wound on the housing with an interference fit to form recesses in the inner electrically insulating layer.

An electric heater according to claim 2. 1, characterized in that the connections for the working medium inlet and outlet are connected to a constant volume capacity, such as radiator heating device.

print version
Publication date 26.03.2007gg