RU67808U1 - LOW-WATER FLEXIBLE AND WATERPROOF HEATER - Google Patents

Abstract

An electric heater for heating products, contains a carbon tape heating element based on cellulose hydrate fiber and current-carrying wires. According to the proposal, the carbon tape and current-carrying wires are placed in an electrically insulating material made of fiberglass, impregnated with a silicone oligomer, and laid in pockets made in the product’s case, while the carbon tape has a width of 10-40 mm. The technical result when using the utility model is to simplify the technology of the manufacturing process and assembly of the heater, increase the reliability of its operation and reduce the cost. 5 ill.

Description

The utility model relates to electrical engineering, to flexible electric heaters that can be used to heat the seats of vehicles, as well as for the manufacture of heated vests, covers, blankets, mattresses, boots, etc. products where local heating of low power is required.

The prior art methods of heating the seats of vehicles using as a heating element a metal wire based on nichrome alloys or threads (see US Pat. RU 2234821, H05B 3/34, 08.20.2004, RU 2123772, H05B 3/34, 20.12. 1998, RU 2110901, H05B 3/34, 05/10/1998, RU 2005117359, B61B 1/00, 01/20/2006, Pat. CA 2559971, H05B 3/34, 09/22/2005, Pat. EP 0582734, B60N 2/56, 02.16.1994, JP 10304949, А47С 7/74, 11.17.1998).

All heaters from the above sources of information have a common drawback: a small heat transfer surface.

Heaters are known in which carbon filaments based on cellulose hydrated fibers are used as heating elements (see RU 2001128126, H05B 3/34, 07/10/2003, RU 95108282, H05B 3/36, 06/10/1996).

However, these heaters have a small heat exchange surface and, unlike the heaters mentioned above, have a higher cost.

A known flexible heater containing a conductive base and mounted on it a conductive resistive module of graphite fabric and flexible electrodes in the form of a metal hollow cord that are wrapped in the edge of this fabric and stitched in a zigzag seam (US Pat. RU 2074524, H05B 3/34, 02.27.1997 ) The applied carbon tape is attached to a heated object or with adhesive

lavsan or polyimide films, or by flashing. The tape can be made with the regulation of the number of threads on the warp and weft.

The conductive wire is supplied to the carbon tape by soldering or riveting.

The use of adhesive tape for attaching a carbon tape does not provide complete reliability of the displacement of the threads along the width of the carbon tape due to its frequent deformation during operation of the seat. This leads to a violation of the current characteristics of the carbon tape and to the failure of the heater as a whole.

The use of tape with the regulation of the number of threads along the width of the tape dramatically leads to a rise in the cost of the heater.

The use of soldering to connect the lead wire to the carbon strip complicates and increases the cost of the heater assembly process and increases the thickness of the connection. The rivet method of connection reduces the reliability of the connection.

The closest technical solution to the claimed utility model is a flexible electric heater, designed for the manufacture of heated vests, covers, blankets and other products, consisting of two layers of an insulating base, a conductive resistive layer placed between them and electrically connected current leads located on both sides of it the edges of the resistive layer, while the conductive resistive layer is made of carbon bundles or threads, the ends of which are placed between a pair of metal strips current leads, which are connected together by spot welding. The layers of the insulating base are connected to the resistive layer with glue (US Pat. RU 2213432, Н05В 3/34, 09/27/2003).

The technical result when using the claimed utility model is to simplify the manufacturing process and assembly

heater, improving the reliability of its operation and, as a consequence, reducing the cost of the heater.

All the above heaters must not be subjected to wet (water) treatment.

The specified technical result is achieved in that the electric heater for heating the products contains a heating element made of carbon tape based on cellulose hydrate fiber and current-carrying wires. According to the proposal, the carbon tape and current-carrying wires are placed in an insulating material made of fiberglass, impregnated with a silicone oligomer, and laid in pockets made in the case of the product, while the carbon tape has a width of 10-40 mm.

The utility model is illustrated by drawings, where:

- figure 1 shows a seat with an electric heater, side view;

- figure 2 shows a seat with an electric heater, a top view;

- figure 3 shows a seat with an electric heater, front view;

- figure 4 shows a section aa in figure 1;

- figure 5 shows an electric heater for heating shoes.

The seat 1 with an electric heater for heating contains a heating element 2 of carbon tape 3 based on cellulose hydrate fibers and current-carrying wires 4. Carbon tape 3 and current-carrying wires 4 are placed in fiberglass insulating material 5 and are placed in pockets 6 made in the seat cover 7. Carbon tape 3 has a width of 40 mm and the square resistance according to TU RB00204056-092-94.

Below is an example No. 1 of the manufacture of an electric heater for a car seat with power up to 70 watts. For this power, a carbon tape 40 mm wide and 700 mm long was used.

Carbon tape 3 in a special installation is placed in an insulating material 5 from a glass cloth previously impregnated with a silicone oligomer.

Conducting wires 4 of the RKGM brand are fixed at the ends of the carbon tape 3 and placed in the insulating material 5 together with the carbon tape. In the seat cover 7, the pockets 6 are stitched from the cotton fabric to accommodate the heating element 2. The seat cover 7 is cut according to the dimensions of the seat. The lead wires 4 are connected to the terminals of the power supply and temperature control.

The proposed heater is easy to manufacture and install, has a large heat transfer surface. When turned on, the electric heater quickly (in a few seconds) gains the set temperature, and when turned off, it also cools quickly. The insulating material for the carbon tape allows for wet processing (cleaning) of both the seat cover and the seat itself with the heater when the power is off. This is achieved by the fact that the insulating material is sealed.

The carbon tape 3 together with the current-carrying wire 4 is tightly fixed in the insulating material (without welding), and therefore multiple deformations during operation of the heater do not lead to deformation of the carbon tape and, accordingly, to its failure. Therefore, the heater can be used in tractor seats where increased deformation of the heater is possible without additional (complicating) devices of the seats themselves in order to reduce the level of deformation.

This flexible heater can also be used to heat blankets, mattresses, body armor, etc.

Another example No. 2 of the proposed flexible electric heater is its use for heating shoes, while the heater power is 10 watts. For this power use a carbon tape with a width of 10 mm and a length of 400 mm.

The manufacture and fastening of a flexible heater is similar to example No. 1, except for the layout of the pockets for laying the heater.

The use of carbon tape with a width of 10 to 40 mm makes it possible to produce a flexible low-watt heater in a wide range of power (from 10 to 500 watts). Given the small thickness of the heater along with the supply wires (not more than 1 mm), its flexibility, tightness, lack of welding, metal strips, quick installation, the proposed low-watt flexible heater can be used in addition to the products described above for heating car mirrors, mirrors in bathrooms.

Claims (1)

An electric heater for heating products containing a heating element of a carbon tape based on cellulose hydrated fiber and current-carrying wires, characterized in that the carbon tape and current-conducting wires are placed in an electrically insulating material made of fiberglass impregnated with a silicone oligomer, and are placed in pockets made in the case of the product, when this carbon tape has a width of 10-40 mm.