RU1799933C - Ironing appliance - Google Patents

Abstract

Use: in enterprises of light industry and consumer services. SUMMARY OF THE INVENTION: the device comprises: an ironing board with a cavity in which preload means in the form of electromagnets are installed, a current regulator, an iron with an ironing sole equipped with an iron preload means in the form of electromagnets. Iron magnets are made constant. The current source is equipped with a polarity switch. The cores in the cavity of the board are placed at the same distance from each other and inside the corresponding windings. The turns of the middle windings are connected in series. The cores are made of plates interconnected in the shape of a rectangle. 2 s.p. f-ly, 2 ill.

Description

The invention relates to ironing devices and can be used in light industry and household services.

The purpose of the invention is to improve the quality of ironing.

This goal is achieved in that in an ironing device comprising an ironing board with a cavity in which windings with cores arranged perpendicular to the ironing surface are installed, connected to a constant current source through a current regulator, and also an iron with an ironing sole equipped with magnets, facing the same poles to the ironing surface, the latter are constant and rigidly fixed in the cavity, additionally made in the ironing sole of the iron. The cores in the cavity of the board are placed at the same distance in each other and inside the windings, the turns of which are connected in series, and are made

from plates connected in the shape of rectangles. The ratio of the width of the plate to its thickness is 1/3 ... 1/5. The direct current source is equipped with a polarity switch.

The implementation of the cavity in the ironing sole of the iron with permanent magnets rigidly fixed in it, as well as the installation of cores in the cavity of the board boards at the same distance and inside the windings with series-connected turns with the simultaneous execution of cores from plates connected in the form of rectangles and having the ratio of the width of the plate to its thickness 1/3 ... 1/5 makes it possible to create a significant force to press the iron to the ironing board due to the interaction of the magnetic fields of the magnets mentioned. The magnetization J of one core plate can be determined by the formula

L

with

with

4 Yu Yu O

With

with

1 + NX

where H is the strength of the floor created by the winding;

% - relative magnetic susceptibility of the core material;

N is the demagnetization coefficient (form).

With the used range of variation of the width of the plate and its thickness, the numerical value of the coefficient N varies in the range of 0.08-0.03, the susceptibility is approximately 200.

The above expression can be represented as

J n

those. magnetization is more than 10 times the magnitude of the external field. An increase in the width of the strips at the same thickness leads to a decrease in the coefficient N, however, with an increase in the thickness of the plates with respect to its width by more than 5 times, part of the core is removed from the zone of the maximum winding field.

The design of the iron is simplified because there are no electrical circuits, elements, and a battery used to power electromagnets.

In FIG. 1 shows an ironing device, a longitudinal section; in FIG. 2 - the same, top view.

The ironing device consists of an iron containing a housing 1, a sole 2 is attached to its lower part. A heating element with fittings 3 is placed in the iron housing. In the cavity 4 made in the sole 2 of the iron, permanent magnets 5 are installed and rigidly fixed, which have the same direction of magnetization. In the cavity 6 of the ironing board 7 there is a magnetizing winding 8, the turns of which are connected in series. Inside the winding there are placed cores 9 having a rectangular shape, placed in each other at the same distance. The cores are made of a magnet of a soft material. The number of cores is from 4 to 10, depending on the length of the ironing board (for small gaps between the cores, they begin to demagnetize each other). Each core consists of plates, the width of which is 2-3 times greater than the thickness of the ironing board 7. The ratio of the width of the plate to its thickness is 1/3 ... 1/5. For cores, fairly cheap steels are used (Art. 20, Art. 3) of high value.

The use of more expensive electrical steel steels for cores with # 500 and more does not give a positive effect due to the high values of the demagnetization coefficient (low elongation of the form).

The windings 8 are connected to an adjustable DC source 10 through a switch 11.

The device operates as follows.

The current source 10 and the regulator are turned on, the magnitude of the current of the magnetizing windings is set. If the magnetic field created by the windings and the magnetization of the permanent magnets of the iron coincide in direction, an attractive force arises between them, which presses the sole of the iron against the ironing board.

To move the iron to the inoperative zone during ironing (when turning the products or moving them) or after the ironing process is completed, the polarities 11 first change the current direction in the windings, creating a force that repels the iron from the board (this force approximately reaches the force t iron sheet). If the ironing process is completed after the iron is moved to the inoperative zone, the switch 11 is set to the off position,

Experimentally verified option

use of an ironing device in which permanent magnets of mass production from ferrite and bari grade 16BA190 having dimensions 84 x 64 x 15 mm are installed in the cavity of the ironing sole of the iron

(2 pcs.).

A winding is placed in the cavity of the ironing board, the outer dimensions of which are 300 mm x 500 mm. The winding consists of 200 turns of wire brand PV-1 with a cross section of 0.6 mm2, an outer diameter of 2 mm and an allowable current of 5 A. The number of cores is 5, they are made of steel grade St. 20, each of the plates is formed and has a rectangular shape in plan.

The plates with a thickness of 10 mm and a width of 30 mm have the following length (each of which is 2 pieces): 270, 440, 260, 380, 200, 320,140,260,80,200. The force of attraction (calculated) due to electromagnetic

the interaction of the field of permanent magnets located in the iron and the magnetic field created by the windings with cores in the cavity of the ironing board is 2 kg. The measured force is 4.0 kg (taking into account the weight of the iron).

Claims (3)

Compared with the prototype, the proposed device can improve the quality of ironing. Ironing quality is improved due to the fact that the current source is equipped with a polarity switch and the iron magnets are made constant. SUMMARY OF THE INVENTION 1. An ironing device comprising an ironing board with a cavity in which a preload device is installed in the form of electromagnets arranged perpendicular to the ironing surface, connected to a current source through a regulator, and an iron with an ironing sole provided with an iron preload device made in the form of magnets facing the same poles to the ironing sole, characterized 0 5 in that, in order to improve the quality of ironing, the current source is equipped with a polarity switch, and the iron magnets are made constant. 2. The device pop. 1, the fact that the cores in the cavity of the board are placed at the same distance from each other and inside the respective windings, while the turns of adjacent windings are connected in series, and the cores are made of plates connected between in the form of rectangles, and the ratio of the width of the plate to its thickness is 5/3. 3. The device according to claim 1, characterized in that the iron has a cavity for receiving magnets.