RU170822U1 - ELECTRIC HEATING DEVICE WITH LIQUID HEATER - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to household electric heating devices. This invention can be used in housing and communal services to achieve a comfortable microclimate in residential premises, both as the main and additional source of heating. The device consists of a transformer electric heater, thermally insulated tubular an annular chamber with fixed corrugated inserts and a heat transfer tank in the form of a standard heating panel.

Description

The invention relates to electrical engineering, in particular, to household electric heating appliances. This invention can be used in housing and communal services to achieve a comfortable microclimate in residential premises as both the main and additional heat source.

The prototype of the proposed device is a patent for the invention RU 2039327 (Class F24H 3/04) from 07/07/1995, "Electroheating device", authors: Elshin A.I., Kazansky V.M. (application for invention 5029071/06 from 02.24.1992). This device contains an annular chamber with inlet and outlet openings for the liquid coolant; inside the annular chamber there is a short-circuited secondary winding of the transformer, which can be made in the form of an electrically conductive non-magnetic closed pipe, the walls of which are adjacent to the walls of the chamber, or in the form of a ribbon-like electrically conductive tape. The radiator and closed pipes form a common heat-transfer tank, which is filled with a liquid heat carrier (usually water) and connected to the annular chamber. In the device, the scale formation process is weakened due to the magnetization of water from the magnetic field of the current flowing along a helical conductive tape. The disadvantages of this device are the duplication of parts due to the mandatory presence and a closed chamber of insulating material and an electrically conductive pipe and a helical electrically conductive tape to give the effect of magnetization of water. This complicates the manufacturing technology of the device, increases its cost and reduces reliability.

The objectives of the invention are to significantly improve the reliability and manufacturability, safety and service life of an electric heating device due to improved design.

In the proposed electric heating device shown in FIG. 1, contains a transformer with a lined core 1 and a primary winding 2 in a protective casing 7 connected to an alternating current network, the annular chamber 3 is simultaneously a secondary short-circuited circuit and is made in the form of a pipe from a conductive non-magnetic material.

The annular tubular chamber is connected to the heat transfer tank 6 in the form of a standard radiator using fittings 5 of insulating material. The inner rectilinear sections of the annular tubular chamber are provided with corrugated inserts 4 made of thin conductive tape, and the outer surface of the chamber is covered with a heat-insulating layer 8. The radiator 6 and the annular tubular chamber 3 are filled with liquid heat carrier (usually water or oil) and form a common coolant circulation system 9.

The proposed electric heating device works as follows: when the primary winding 2 is connected to the network, an alternating magnetic flux is excited in the transformer magnetic circuit 1, which generates a sufficiently large current (measured by kiloamperes) in the short-circuited tubular annular chamber 3 and the corresponding electric heating of this conductor, proportional to the square of the secondary current in it. As a result of a sufficiently large contact surface of the inner surface of the annular chamber with a heated coolant (water), intense heat exchange occurs between the chamber walls and water. The thin-sheet corrugated strips 4, fixed by wedging with the plates 10, increase the heat transfer area from the inner surface of the chamber, and also participate in the magnetization of circulating water, since part of the secondary current that creates a transverse magnetic field in the region of the corrugated inserts passes through them. Under the influence of natural convection of the heated coolant 9 in the reservoir of the proposed device and on its heat transfer surface (in particular, on the radiator 6), the set temperature is maintained, which ensures heating of the air environment of the heated room.

Continuous magnetization of water significantly reduces scale formation on the walls of the chamber and radiator. This significantly increases the durability of the heating appliance. The device increases the level of fire safety due to the absence of critical temperatures in it, sufficient to ignite surrounding objects, and also increases the level of electrical safety due to the use of thermal insulation on the surface of a short-circuited annular chamber.

Claims (3)

1. An electric heating device, including a transformer electric heater with a short-circuited secondary winding in the form of a tubular annular chamber of conductive non-magnetic material and a heat transfer tank connected to the annular chamber by means of two nozzles filled with liquid coolant, characterized in that they are inserted into the rectilinear parts of the tubular chamber when assembling the device corrugated strips of conductive sheet material. 2. The device according to p. 1, characterized in that the corrugated strips of conductive sheet material inside the tubular chamber are fixed by wedging with metal plates in the lower and upper parts of the corrugated insert. 3. The device according to p. 1, characterized in that the tubular chamber and tubular pipes outside are coated with a heat insulating layer.

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