SU7457A1 - Heating device - Google Patents

Description

The present invention aims to balance the temperature in various places of the external heat transfer shell of the device with hollow walls, by successively changing the distance between the shell and the internal flame tube, as well as by introducing devices that change the heat transfer rate in the form of insulations, shields, fins and t . P.

FIG. 1-8 schematically depict each in longitudinal and transverse section — four examples of the implementation of heating devices with various devices for controlling the conditions of heat transfer; FIG. 9 and 10, in longitudinal and cross-section, a heating device with a special design in the wall; FIG. 11 and 12, in longitudinal section, two types of heating devices, in which heat transfer occurs mainly by convection; FIG. 13-15 is a modification of the device, namely: FIG. 13, longitudinal section down; FIG. 14- front, part in section and FIG. 15-top, also partly in section.

FIG. 1 and 2, the heating device consists of an inner, directly heated wall 2 and an outer wall 3, heated mainly by radiant heat. In order to achieve a possible uniform and not too high temperature of the wall 3 transmitting heat to the medium heated by the device, the internal step near the entrance of the heating gases is supplied with thermal insulation, for example, chamotte gasket 4. Referring to FIG. 3 and 4, as well as 5 and 6, the same goal is achieved by increasing the heat-absorbing surfaces of the outer wall 3, with the help of fins 5, or the heat-transmitting surfaces of the inner wall 2, with the help of fins 6 with an increasing channel for the passage of heating gases. In both cases, the inner side of the inner wall can still be equipped with devices to increase the heating area (fins 7), the volume of which also increases towards the output of the heating gases to cause an increase in heat transfer, balancing the temperature drop of the heating gases. According to FIG. 7 and 8, the effect on the heat transfer and, consequently, on the temperature of the outer surface of the outer wall 3 is exerted by the screen 10, which is installed by the shells 2 and 3 near the entrance of heating gases and the wall 3 that obstructs the transmission of the radiant tenlota and thus prevents the shell 3 from overheating The convection current caused by this screen 10, for its part, is favorable — the heat transfer can be evenly distributed throughout. .

In the heaters shown in FIG. 9 and 10, the inner wall has the shape of a Latin letter V, i.e. A change is provided. A rising temperature with a higher temperature and a lowering shaft with a lower temperature everywhere give an approximately uniform temperature; over the entire heating device, heat is uniformly distributed, as a result, the temperature of the outer surface of the outer wall is almost uniform, and, due to the mediocre heating, is relatively low. A similar heat-conducting connection of the rising and lowering shafts of the inner wall contributes to this effect, in some places, or completely throughout, and the transfer of heat through the joints still completes the temperature equation; the V-shaped diameter of the directly heated tube expands into the part conducting the heating gases from above and again narrows at the outlet of the gases so that an increase in the heating area from bottom to top of the heat-generating device is obtained, which contributes to the amount of radiant the heat is the same and, accordingly, the temperature of the outer surface of the outer wall is approximately uniform.

In order to promote uniform radiation of heat from the inner to the outer wall, both branches of the inner wall in some places 9 or along their entire length are interconnected, so that already at the inner wall 2 the temperature equation is obtained, which, for its part, has

impact on the outer wall 3 in the desired direction. In order to avoid heating the spring wall near the entrance of the heating gases into the space bounded by the inner wall, the inner wall at this point is so inclined that the transfer of radiant heat from the hottest places of the inner shell indicated by arrows (Fig. 9) is absorbed first by some distance most of the area of the outer shell. The use of air enclosed in the air cavity, in order to determine the temperature of the outer wall, is shown in FIG. 11 and 12, where walls 2 and 3 are arranged in such a way that they form completely closed annular air channels, through which the latter constantly circulates. In the example of FIG. 12, in addition, it is provided to increase the heat absorbing heating surfaces, the device of the fins 8 at more remote locations of the outer shell 3, in order to cause more intensive heat absorption and thereby an increase in the wall temperature. In a modification of the device shown in FIG. 13-15, the combustion chamber 2 and the collecting chamber of the exhaust gas of the gas heater are located at a distance from one another with respect to the horizontal plane. Directly heated walls 4, having the shape of a Latin letter V, adjoin the combustion chamber 2, and their exit ends open into the exhaust gas collecting chamber 3. Directly heated walls 4 are surrounded by walls 5 that are adjacent to the surrounding combustion chamber 2 wall 6, and from the other side to wall 7 propagating along the entire length and width of the device. This wall serves to protect the room 8 to be heated from the radiant heat of the wall 8 and encloses the exhaust gas chamber 3. Heating almost entirely, radiant heat, i.e. mediocrely, the walls 5 transfer their heat to the air of the room, which from the bottom, in the form of a constant convection current, enters the device between the chamber of the mountain 2 and the wall 7, and flows upward between the outer walls 5. In order to maintain and control the heating, the door 10 in the front wall of the combustion chamber 2, it opens access to the latter, and the 9-hole to the wall 6. The directly heated walls 4, according to the purpose they serve, have (Fig. 15) a cross section like an ellipsis and are supplied between their ascending and descending sh Achta continuous or non-continuous heat-conducting compounds JL2.

The subject of the patent.

1. A heating device with two walls of surrounding heating gases, the air space between which, closed at one or both ends, is intended solely to transfer heat from the internal, directly heated by hot gases, wall to the outside, transferring the resulting heat to the medium heated by the device, characterized in that, in order to achieve a uniform temperature of the entire surface of the outer wall 3, the hottest part of the inner wall 2 is provided with or thermal insulation 4 (Fig. 1-2),

or ring screen 10 (Fig. 7), or the one or the other wall, or both at the same time, equipped with ribs 5, 6, 7

(FIEE 3-6).

2. The form of implementation specified in n. 1 of the device, characterized in that the internal heat tube 2 has a V-shaped curved shape and its upward branch gradually extends upward, its downward branch narrowing from the inflection point (Fig. 9).

B. In device no. 2, the use of heat-conducting connections 9 between both branches of the flame tube.

4. The form of the device specified in paragraph 1, characterized in that its outer shell forms a closed annular channel for the purpose of circulating the air trapped in its cavity (Fig. 12-13).

5. The shape of the device, according to p. 2, characterized in that its outer walls 5 (Figs 13-15) are attached on one side of the shell 6 of the combustion chamber 2, and on the other side to the wall 7 enclosing the collecting chamber 3 the entire length and width of the device and designed to protect the wall of the heated room from radiant heat.

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