RU2410605C1 - Device to reduce scattering of heat energy into environment - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: device relates to power engineering and may be used in industry, agriculture and domestic electrical appliances to heat surfaces. Device to reduce scattering of heat energy into environment comprises surface for heating, gas burner protruding above surface, for instance, of cooker, and screen with reflecting inner surface concentrically arranged around gas burner with the possibility to supply air and form gas and air mixture. Screen is arranged in the form of diffuser with edge of its expansion towards heating surface, and at the side of narrowing edge there are holes arranged for air supply with a certain pitch along the length of the latter.

EFFECT: simplified design of device and technology of manufacturing, reduced amount of time for heating of surface, reduce consumption of gas and increased safety of device operation.

3 cl, 1 dwg

Description

The invention relates to the field of energy and can be used in industry, agriculture, household appliances for heating surfaces.

A device is known for reducing the dispersion of thermal energy into the environment (Ukrainian patent No. 28698 A, M.cl. F23D 14/20, 2000 and F24C 3/00, 2000), comprising a surface for heating, a gas burner protruding above a surface, such as a stove, and a screen with a reflective inner surface, concentrically mounted around a gas burner with the possibility of air supply and the formation of an air-gas mixture. The described device is taken by us as a prototype, as the closest in essential features and the achieved result.

The disadvantage of the described device is the presence of two screens with reflective surfaces, which makes the device more complicated and its manufacturing technology. In this case, the annular screen 7 is placed concentrically to the housing 1, i.e. vertically, and is designed to reflect combustion energy in a horizontal plane. The screen 8 is placed horizontally and is designed to reflect energy in a vertical plane. As a result, the combustion energy reflected from the annular screen is concentrated in its central part, i.e. on the burner, and expended in heating the supports forming the burner, in heating the housing 1 with covers, nozzles and holders, and not on the surface for heating, since the latter is located above the energy concentration zone. In addition, the presence of an annular screen leads to the formation of another, additional cavity, in which the formation of a gas-air mixture also occurs. This additional cavity is formed between the cylindrical surface of the housing 1 and the annular screen 7. In this cavity due to convection of an uncontrolled amount of cold secondary air from the environment, an air-gas mixture is also formed. At the same time, the combustion energy reflected by the annular screen is also spent on heating this mixture. In addition, the formation of an additional cavity in this case leads to the fact that the gas-air mixture, which is located in the housing 1 and nozzles 11, will not be able to pass through the slots 9 of the screen 8. This is because the resistance in the slots 9 is much higher than in the cavity between the vertical walls of the housing 1 and the annular screen 7, where the resistance is generally absent due to convection of the secondary air. The latter contributes to the capture of convective flows of the gas-air mixture from the housing 1 and nozzles 11 into the additional cavity between the cylindrical surface of the housing 1 and the annular screen 7. This causes the combustion of the specified air-gas mixture not under the surface for heating, but in the space between the cylindrical surface of the housing 1 and the annular screen 7 , as well as under the screen 8 and around the nozzles 11, which can lead to an explosion in the housing 1. At the same time, installing a horizontal screen makes no sense.

Thus, the installation of two screens with reflective surfaces in the vertical and horizontal plane does not contribute to the concentration of combustion energy on the surface for heating, and therefore, to reduce the dissipation of thermal energy, and does not provide an increase in the rate of heating of the surface, economical gas consumption and safe operation of the device.

The basis of the invention is the task by ensuring the concentration of combustion energy directly on the surface for heating, the formation of a gas-air mixture and its combustion in only one cavity, simplifying the design of the device and its manufacturing technology to reduce the amount of time for heating the surface, to ensure economical gas consumption and safe operation of the device .

The solution to this problem is achieved by the fact that in the proposed device, the screen is made in the form of a diffuser with its expansion edge towards the surface for heating, and from the side of the narrowing edge with a certain step along the length of the latter, holes are made for air passage.

In addition, the holes for the passage of air can be equipped with a means for regulating their flow area.

In addition, the means for regulating the bore of the holes can be made in the form of dampers.

The implementation of the screen in the form of a diffuser provides a simplification of the device and its manufacturing technology. The placement of the diffuser with the reflecting inner surface of the expansion edge towards the surface for heating, provides a concentration of combustion energy of the specified gas-air mixture directly on the surface for heating. The design of the screen in the form of a diffuser with holes for the passage of air from the side opposite the expansion edge, ensures that from the moment the gas is turned on due to the occurrence of injection and convection, there is a continuous flow of air towards the gas outlet, as well as the formation of one cavity for the formation of one gas-air mixture around the burner. All of the above contributes to the safe operation of the device, leads to a decrease in the amount of time it takes to heat the specified surface and, therefore, economical gas consumption.

The holes for the passage of air into the cavity of the diffuser with means for regulating their flow area, for example in the form of dampers, provides the possibility of dosed supply of the optimal amount of air, as well as the ability to control and adjust the nature of its movement, which determines the efficiency of combustion of the gas-air mixture and a significant increase in the efficiency of consumption gas.

Thus, the proposed features together with the known provide a solution to the problem.

The invention is illustrated in the drawing, which shows a cross section of a device to reduce the dissipation of thermal energy when heating the surface.

The proposed device includes a heating surface 1, a gas burner 2, protruding above the surface 3, such as a stove, and a screen with a reflective inner surface 4, made in the form of a diffuser 5, which is concentrically mounted around the gas burner 2. In this case, the diffuser 5 is installed by the expansion edge 6 towards the surface for heating 1. On the opposite side, from the edge of the narrowing 7 with a certain step along the length of the latter, holes 8 are made for air passage.

The holes 8 for the passage of air can be equipped with a means for regulating their bore, made, for example, in the form of dampers 9.

In addition, the heating surface, in this case pan 1, is mounted on the grate 10 of the stove.

Moreover, in the diffuser 5 around the burner 2 is formed a cavity 11. The operation of the proposed device is as follows.

On the surface 3 of the household gas stove around the burner 2, a diffuser 5 is installed concentrically with the expansion edge 6 upward with the pre-adjusted passage section of the holes 8 using, in this case, dampers 9. Then, a heating surface 1 is installed on the grate 10, in this case a pot of liquid. Turn on the gas and set fire to the gas-air mixture formed in the cavity of the diffuser 5. The resulting combustion products freely leave the pan 1 through the gaps in the environment guaranteed by the presence of the grill 10 and the corresponding expansion of the diffuser 5. Moreover, as a result of a decrease in the dissipation of thermal energy released during the combustion of the gas-air mixture in the diffuser, this energy is concentrated directly on the surface of the pan 1, which ensures its heating to a certain temperature in a shorter time and, as a result, ensures economical gas consumption. The combustion of the gas-air mixture in one cavity, directly below the surface for heating, ensures the safety of the device.

Claims (3)

1. A device for reducing the dissipation of thermal energy into the environment, containing a surface for heating, a gas burner protruding above the surface of, for example, a stove, and a screen with a reflective inner surface, concentrically mounted around the gas burner with the possibility of air supply and the formation of an air-gas mixture, characterized the fact that the screen is made in the form of a diffuser with the edge of its expansion towards the surface for heating, and from the side of the narrowing edge with a certain step along the length of the latter made TIFA air supply. 2. The device according to claim 1, characterized in that the openings for the passage of air are provided with means for regulating their flow area. 3. The device according to claim 2, characterized in that the means for regulating the bore of the holes is made in the form of dampers.