RU98231U1 - ELECTRIC GENERATING HEATER AND HOB DEVICE - Google Patents

Abstract

 1. Electric generating heating and cooking device containing a household stove with a chimney, a water tank, a thermoelectric generator, characterized in that it is additionally equipped with a truncated cone with a truncated apex and base and installed in the chimney section between the stove and the water tank, through which the chimney passes, with a truncated top down to the furnace with a recuperator with a deflector installed inside it, while the recuperator and water tank are located symmetrically to the axis of the chimney and ikalno one above the other to form a gap between them, in which is tightly mounted thermoelectric generator. ! 2. The electric heating and cooking device according to claim 1, characterized in that the deflector is made biconical. ! 3. The electric heating and cooking device according to claim 1, characterized in that the furnace has an outlet pipe. ! 4. An electric heating and cooking device according to claim 1, characterized in that a recuperator is installed on the outlet pipe.

Description

The utility model relates to domestic solid fuel furnaces with a thermoelectric generator installed for direct conversion of thermal energy into electrical energy and can be used for space heating, cooking and water heating at facilities remote from power lines, in separate buildings, not electrified, in emergency situations with de-energization from stationary networks and to save electricity.

Known electric-generating wood-burning heating and cooking stove "Indigirka" (commercially available since 2009, the products of ZAO "Termofor" in Novosibirsk). The thermal energy of the fuel burning in this furnace is converted into electrical energy in a thermoelectric generator, with thermal contact to the side wall of the furnace device, using the removal of excess heat by blowing the radiators of the thermoelectric assembly using fans. The stove is very compact, comfortable and has a great design. However, the forced ventilation necessary to cool the cold junctions of the thermoelectric generator (TEG) and select the generated electric energy for the operation of the fan itself reduces the efficiency of electric energy use and the reliability of the furnace due to possible failure of the fan.

Known heating and cooking furnace with direct conversion of thermal energy into electrical energy through a tightly integrated thermoelectric generator (TEG) in the upper part of the combustion chamber with the removal of excess heat from the cold junctions of the TEG using water circulating along the thermosiphon circuit (US Pat. RF No. 2172448, publ. 03/24/2000) To ensure uniform heating of the radiator of the thermoelectric generator, the combustion chamber additionally contains heat-insulating screens, and to ensure the cooling of the water by the heating and cooking stove, supplement The flax is equipped with a circulating piping system when connected to an accumulation tank.

The furnace is original and ensures the autonomy of the thermoelectric generator, but in general the whole structure is quite bulky.

Known thermoelectric household generator (Pat. RF №2348089, publ. 02.27.2009) containing a domestic oven, thermoelectric generator, water circulation system with a steam-water pump, a water heat sink of a thermoelectric generator, water conduits. A thermoelectric household generator provides water circulation in the system in the absence of electrical energy and has a very original water circulation system. However, in general, the entire structure is somewhat cumbersome. This thermoelectric household generator is the closest to the proposed utility model.

The technical result, which is achieved by the claimed utility model, is to ensure compactness, increase the efficiency of heat transfer and fire safety. To achieve the technical result, an electric generating heating and cooking device containing a household stove with a chimney, a water tank, and a thermoelectric generator are additionally equipped with a truncated cone with a truncated apex and base and installed in the chimney section between the stove and the water tank, through which the chimney passes, downward with a truncated apex onto the furnace by a recuperator with a deflector installed inside it, while the recuperator and the water tank are located symmetrically differently to the axis of the chimney and vertically one above the other with the formation of a gap between each other, in which the thermoelectric generator is tightly mounted. In addition, the deflector is made biconical, the furnace has an outlet pipe on which a recuperator is installed. Distinctive features of the proposed device from the above known, closest to it are additional installation in the section of the chimney between the stove and the water tank of the recuperator with a deflector installed inside it and the location of the thermoelectric generator (TEG) in the gap between the recuperator and the water tank, as well as the location of the recuperator and the water tank, is symmetrical to the axis of the chimney and Vertical, one above the other. In addition, the recuperator is a truncated cone with a truncated apex and base, with a truncated apex pointing down and the base up. The deflector is made biconical. The household stove has an outlet pipe on which a recuperator is mounted with a truncated top.

Due to the presence of these signs, the compactness of the entire device is ensured, the heat exchange efficiency and fire safety are increased. The compactness of the entire installation is ensured by the fact that the furnace, recuperator and water tank are located one above the other, and the water tank and recuperator are symmetrical about the axis of the chimney. Fire safety is due to the fact that the recuperator is installed on the outlet pipe of the furnace with its truncated top and the base up. As a result of this installation, solid hot particles of unburned fuel, falling into the recuperator, lose speed, and, hitting the base of the recuperator, are transferred back to the furnace. In addition, thanks to the recuperator, the process of heating the room is accelerated, because its heated side surface additionally radiates heat to the room, and also due to the installation of a biconical deflector in the heat exchanger, the heat transfer from the hot gas flow increases and the hot gas flow is redistributed and directed to the upper part of the heat exchanger, i.e. to its base, above which are located hot TEG junctions. Cold TEG junctions are in contact with the bottom of the tank 3 for water and thereby they are cooled.

The proposed electric heating and cooking device is illustrated by the drawing shown in the figure.

The figure shows a longitudinal section of a device.

The electric heating and cooking device comprises a domestic oven 1, a recuperator 2, a water tank 3, a thermoelectric generator (TEG) 4, a chimney 5. The recuperator 2 is made in the form of a truncated cone 6, which has a truncated apex 7 and a base 8. A heat exchanger 2 is installed biconical deflector 9. On the stove 10 of the household stove 1 there is a nozzle 11 from the chimney 5. A recuperator 2 is installed in the section of the chimney 5 on the nozzle 11 of the stove 1 with a truncated top 7. A tank 3 is installed over the recuperator 2, made in the form of a truncated cone 6 water with the formation of a gap 12 between the tank 3 and the recuperator 2. TEG 4 is tightly installed in this gap 12. In this case, the hot junctions are located on the base 8 of the truncated cone 6, and the cold junctions of the TEG 4 are snug against the bottom 13 of the water tank 3. The water tank 3 is welded to the chimney 5, which passes through the tank 3. Moreover, the water tank 3 and the recuperator 2 are located symmetrically relative to the axis 14 of the chimney 5. The pipe section 5 in the gap 12 is covered with thermal insulation 15 to eliminate the effect of heat transfer from the chimney 5 temperature difference TEG 4.

The proposed electric heating and cooking device operates as follows.

First, solid fuel is loaded into the household furnace 1 and kindling is performed. The fuel burns, hot flue gases rise upward, enter the expanded recuperator 2, go around the biconical deflector 9, while their path lengthens and turns from laminar to turbulent, thereby increasing the heat transfer to the walls of the recuperator 2. In addition, solid hot particles of unburned fuel entering in such a recuperator 2, they lose speed, and, hitting the base 8, are moved back to the furnace. The biconical deflector 9, installed in the recuperator 2, additionally provides the direction and concentration of the hot smoke fluxes to the base 8. The base 8, on which the hot junctions of the TEG 4 are located, heats up, and the hot junctions of the TEG 4 heat up respectively. Between the hot and cold junctions of the TEG 4, which are located under the bottom of the tank 3 for water, a temperature difference is created, the so-called thermo-EMF, an electric current begins to be generated. Hot junctions heat up to 200-250 ° С, and cold junctions heat up to 100 ° С as much as possible. About 6-9 minutes after ignition of the fuel in the furnace, the TEG enters a stable mode. The temperature difference between the junctions of TEG 4 is small, but sufficient to generate an electric current with voltage up to 12 V and power up to 50 W. The generated electrical energy goes to the consumer. Heated water in the tank 3 is used for domestic needs, taking it from the tank 3 and filling it with cold water. After burning fuel, furnace 1 together with TEG 4 cools down slowly, which helps to maintain the temperature difference between the junctions, thereby generating electrical energy for some time after the end of the combustion process. In addition, the slow cooling of the furnace together with the TEG eliminates sudden changes in temperature, which contributes to an increase in the life of the TEG.

The proposed electric generating heating and cooking device is compact, has increased fire safety and increased heat dissipation. The device can be used in almost any environment, including in bath and utility buildings.

Claims (4)

1. Electric generating heating and cooking device containing a household stove with a chimney, a water tank, a thermoelectric generator, characterized in that it is additionally equipped with a truncated cone with a truncated apex and base and installed in the chimney section between the stove and the water tank, through which the chimney passes, with a truncated top down to the furnace with a recuperator with a deflector installed inside it, while the recuperator and water tank are located symmetrically to the axis of the chimney and ikalno one above the other to form a gap between them, in which is tightly mounted thermoelectric generator. 2. The electric heating and cooking device according to claim 1, characterized in that the deflector is made biconical. 3. The electric heating and cooking device according to claim 1, characterized in that the furnace has an outlet pipe. 4. An electric heating and cooking device according to claim 1, characterized in that a recuperator is installed on the outlet pipe.