RU8094U1 - ELECTRIC CONVECTOR - Google Patents

Abstract

1. An electric convector comprising electrically conductive outer and inner shells located one in another and connected by jumpers, an electric heater, which is a secondary short-circuited transformer circuit formed by shell casings and jumpers, and a magnetic circuit with a transformer primary winding worn on the inner shell of the transformer, characterized in that ribs are arranged on the inner side of the inner shell so that they divide the inner space of the inner shell points on several channels. 2. Electroconvector according to claim 1, characterized in that the inner shell with ribs form a helical surface.

Description

Electroconvector

The utility model relates to electrical engineering and can be used as an electric heating device with natural or forced circulation of heated air.

Known cabinet electric convector (application US 4900889 MKI F 24 H 3/02 NKI 219/339), made in a rectangular case, inside which there is an aluminum U-shaped case with high temperature insulation. In the longitudinal part of the U-shaped housing there are 2 quartz lamps closed by a heat exchanger with many ventilation openings. In the rear walls of the case there is an air intake hole with a fan and a protective mesh.

The main disadvantages of this electroconvector are high electrical and fire hazard, low specific heat transfer and a rather complicated production technology.

Known electric convector (application 2632374 France MKI F 24 H 3/04) containing a plastic housing with an input lower and upper outlet holes. In the lower part of the casing there is an electric heater TEN-type for heating the incoming air, and inside the casing there is a fan installed on the stand, directing air to the outlet through an additional grill.

An electric convector is also known (patent 190155 of the Hungarian Republic MKI N05 B 3/00), the basis of which are ceramic rods with good thermal conductivity. On these rods, coils of high-resistance wire are wound. The heating element is installed in the heat exchanger, while the surface of the latter is at least 2 orders of magnitude higher than the surface of the heater MKI: F 24 H 3/04

element.

The main disadvantages of these analogues are the increased electrical and fire hazard due to the constant connection to the mains voltage of 220 V or more, as well as insufficient reliability.

Known electric convector for heating indoor air (patent 2045821 Russia MKI N05 B 3/12), comprising a housing and a resistive electric heating element, the latter being a radiating screen and made in the form of a foil tape with certain electrical parameters, which can increase the uniformity of air heating. Like the previous analogues, this electric heater has an increased electrical fire hazard and, in addition, the oxygen content of the air decreases when it is touched by a heating tape.

An electric convector is also known (Russian patent No. 2047053 MKI F 24 H 3/04), adopted as a prototype, characterized by high electrical safety (voltage on the fuel element does not exceed 2 volts) and sufficient fire safety (the temperature of the hottest points of the heat exchanger does not exceed 85-90 ° C.) It contains a housing consisting of outer and inner shells, located one in another and connected by jumpers, an electric heater, which is a secondary short-circuited transformer circuit formed by shells of a building a mustache and jumpers, a magnetic circuit with the primary winding of the transformer, worn on the inner shell of the housing. The inner shell is provided externally with electrically conductive and thermally conductive fins located above the primary winding with a magnetic circuit.

that the main heat flow passes between the shells and the outer ribs of the inner shell and intensively heats the primary winding with deteriorated cooling conditions. This reduces the installed capacity in these dimensions and the service life of the insulation of the winding wire, and, as a result, the reliability and durability of the whole device.

In addition, at a given power of the electroconvector, the diametrical dimensions of the inner shell cannot be less than the permissible value from the condition of overheating of the shell, which does not reduce the size of the magnetic circuit and the primary winding, which leads to an increase in metal consumption.

The objective of the utility model is to create an electroconvector more reliable, durable and with less metal consumption.

This is achieved by the fact that in the electric convector containing the housing, consisting of the outer and inner shells, located one in the other and connected by jumpers, an electric heater,

which is a secondary short-circuited transformer circuit formed by shell casings and jumpers, and a magnetic circuit with a transformer primary winding, worn on the inner shell of the housing, electrically conductive ribs are made on the inner side of the inner shell so that they divide the inner space of the inner shell into several channels.

The inner shell with ribs can also form a helical surface.

Figure 1 presents a vertical section of the proposed electroconvector, which consists of the outer shell 1 of the electroconvector, and the inner shell 2, connected with the upper 3 and lower 4

conductive covers (jumpers) with the outer shell 1, forming a short-circuited secondary circuit of the transformer. A lined magnetic core 5 with a primary winding 6, insulated from the inner shell 2 with an insulating sleeve 7 and a flat insulating washer 8 with holes 9 is put on the inner shell 2. The holes 9 are aligned with the holes 10 of the upper 3 and lower 4 connecting covers. The inner surface of the shell 2 is made with electrically conductive ribs 11, which form the vertical channels 12. The electric convector is mounted on the base 13 with holes 14, which can be integral with the outer shell 1.

The proposed electric convector works as follows.

When the primary winding 6 is connected to the supply network in the magnetic circuit 5, a time-varying magnetic flux is generated, inducing an emf in the secondary circuit, which in turn creates a sufficiently large current (measured by kiloamperes), which causes the shells 1,2 and the covers 3,4 to heat up. When heated in the space between the outer and inner 2 shells, a natural circulation of air occurs, and cold air, passing through holes 9 and 10, washes the primary winding and reduces its thermal stress. The bulk of the air is intensively heated in the channels 12 formed by the shell 2 and ribs 11, streamlined by the current of the secondary circuit, which provides natural air circulation and heat exchange with the environment in a heated room.

The electric convector can be equipped with a fan to create forced air circulation.

The technical effect of the proposed electroconvector in contrast to the prototype is as follows.

Moreover, the largest part of the heat is released in the channels 12. And the minimum part of the heat is generated in the space between the shells 1 and 2. This allows for a given power of the electroconvector to reduce its material consumption.

Provides an increase in reliability and durability of the electroconvector, in connection with the improvement of the cooling conditions of the primary winding.

-Elshin A.I.

J / /)

zW-gya G Ch Kazansky V.M.

g / Verkhoglyadov A.D.

rf - (/

Authors:

Claims (2)

1. An electric convector comprising electrically conductive outer and inner shells located one in another and connected by jumpers, an electric heater, which is a secondary short-circuited transformer circuit formed by shell casings and jumpers, and a magnetic circuit with a transformer primary winding worn on the inner shell of the transformer, characterized in that ribs are arranged on the inner side of the inner shell so that they divide the inner space of the inner shell points on multiple channels. 2. Electroconvector according to claim 1, characterized in that the inner shell with ribs form a helical surface.