SK500782012U1 - Low-temperature radiant heater for hot water systems - Google Patents

Abstract

Low-temperature radiant heater for hot water systems consisting of a heat exchanger (2) formed by the tubes coil (20) in cylindrical springs shape which are hydraulic connected to each other. Exchanger (2) is connected to the inlet (24) and an outlet (23) of hot water. To snap (21) and screw connections (22) secure the heat exchanger (2) on the envelope (1) with thermal insulation (11) located on the sides of heat repulsion Heater is closed with visual mesh (3). Exchanger (2) halls heat directly without extra space on the opposite interior surfaces, which in turn heat the air.

Description

Low temperature radiant heating element for hot water systems

Technical field

The technical solution concerns heaters intended for low-temperature heating and high-temperature cooling of buildings by a hot-water system.

BACKGROUND OF THE INVENTION

In particular, convector heaters, such as plate radiators, sectional radiators cast from aluminum alloys or cast iron, are known which are designed for high-temperature heating. The main way of heat distribution is convection - it means that they heat the air directly.

Their disadvantage is, in particular, that the bodies are intended only for vertical mounting and the flow in these constructions is directly proportional to the temperature difference between the heating element and the air.

Air-conditioning exchangers are also known which are formed by layering parallel, straight metal tubes in multiple planes, onto which sheets are formed with narrow gaps, forming an auxiliary heat exchange surface. Tubes are the main fluid lines through which the heating or cooling medium flows. To increase the heat output of the exchanger by convection, the cooler air flow is supplied by a fan, typically air handling units, fan coils and floor convectors. The main way of spreading heat is also convection - it converts air directly.

Another prior art is metal radiant hinge panels. Their construction consists in that the auxiliary metal surfaces of the heat exchange are pressed onto the straight medium tubes arranged in a plane with a spacing. These bodies are characterized by a plate shape, where the length of the body is significant in the dimensions of the installation. Since high temperatures are used for heating, the large length of the panels results in a significant difference in the heating water temperature at the beginning and at the end of the panel, resulting in uneven space heating. In order to maintain the turbulent flow of the liquid, it is necessary to prevent the flow rate from falling below the minimum values. Laminate flow significantly reduces heat exchange and hence the performance of ceiling radiant panels. For vertical installation without the use of flow restraints, the radiation ratio at total thermal power is negligible when high temperatures are used and the heat dissipation by convection prevails.

A further known prior art is surface radiant heating systems which are formed by surface arrangements of heating tubes. The mounting of the surface systems can be dry or wet. In the wet process, the heating pipes are mounted on the wall, the ceiling under plaster and then plastered. When installed in the floor, they are poured with concrete screed or attached to steel reinforcement and concrete mats during the construction of the reinforced concrete skeleton of the building. The hot water flows through the main heating pipes during heating and the heat is transferred to the plaster or concrete and after overcoming the thermal resistance of the hall materials to the opposite surfaces of the interior. In the dry assembly method, the pipes are inserted into the grooved gypsum plasterboard grooves. The heat transfer is affected by the thermal resistance of the material in contact with the heating pipe. Surface radiant systems are conservative in terms of possible layout changes of the building and the large storage capacity does not allow immediate changes in the interior temperature, which causes thermal discomfort especially during the transitional period.

The prior art radiant systems utilize auxiliary surfaces to effect radiation, whereby heat from the main medium pipes is transferred by transfer from the loss of temperature to the auxiliary surfaces. The difference in mean heating temperature and mean radiant surface temperature normally reaches 10% to 20%, resulting in increased heat consumption.

The essence of the technical solution

The aforementioned drawbacks of the prior art are largely eliminated by a low-temperature radiant heating element consisting of a peripheral shell in which a heating element is located, the nature of which is that the heating element is formed by at least one tubular heat exchanger which is inserted into the outside. a fixing clip, by means of which it is usually fastened to the rear wall of the housing by a screw connection.

Preferably, one other than the rear wall of the housing is provided with a grid.

The exchanger is formed from at least one column winding, which is made of thin-walled tubes and arranged in a spatial formation of a cylindrical spring.

The column winding is connected to the inlet and outlet of the hot water pipe of the heating system and the windings are preferably joined into sets.

The package is arranged either side by side and / or one after the other and / or the packages are inserted into one another, and these are hydraulically interconnected.

The grille for the visual overlap and allowing the spread of thermal radiation is removably placed on the facing wall of the housing for vertical placement of the body on the wall of the room and for horizontal placement of the body under the ceiling of the rooms.

The edges of the side walls of the casing in the vertical mounting of the body on the wall as well as in the horizontal mounting of the body are extended in order to direct the radiant flow into the space in the direction of the grating and prevent air flow.

The walls of the shell, except for the visible one, are insulated when the body is placed horizontally under the ceiling of the room and into the floor of the room.

The grille for the visual overlap and allowing the thermal radiation to be spread is removably placed on the face wall of the housing.

The low-temperature radiant elements have a heat exchanger shaped in the shape of a cylindrical spring without auxiliary surfaces. The mean heating temperature is identical to the mean radiant surface temperature.

The size, number and placement of coil coils in the form of a cylindrical spring depends on the required output and the type of heater.

Heat radiation allows the interior to be heated by 2 to 3 ° C at a lower temperature than in systems using convection. Reducing the heating temperature by 1 ° C reduces costs by up to 6%.

Low-temperature radiant heating and high-temperature cooling by low-temperature radiators will reduce heating costs due to radiation and, in particular, to low heating temperatures, allowing high power numbers for heat sources and thus significant energy savings.

BRIEF DESCRIPTION OF THE DRAWINGS

The solution is illustrated in more detail in the attached drawings, where:

Fig. 1 is a side cross-sectional view of a heater assembly for horizontal placement under a ceiling of a room;

Fig. 2 is a bottom view of the exposed assembly of FIG. 1;

Fig. 3 is a top cross-sectional view of a heater assembly for vertical placement on a room wall;

Fig. 4 is a front view of the exposed assembly of FIG. Third

Examples of technical solution

Example 1

The low-temperature horizontal heater (shown in Figures 1 and 2) is intended for installation in coffered ceilings or below the ceiling. It consists of a casing 1 having side walls 13 and a rear wall 12 and thermally insulated towards the top and sides by an insulation 11 to prevent heat transfer to the top. The lower edges (not shown in the figure) of the side walls 13 are extended below the lower edge of the exchanger 2 for directed downward air flow. The heat exchanger 2 consists of coils 20 of cylindrical spring tubes arranged side by side and hydraulically connected to each other and connected to the hot water inlet 24 and hot water outlet 23. The heat exchanger 2 is attached to the rear wall 12 of the housing 1 by means of fasteners 21 and screw connections 22. The housing 1 is closed from the bottom by a visible grid 3 of perforated sheet metal.

The heating process is carried out in such a way that the heated water is supplied from a heat source (not indicated in the figure) via an inlet 24 to a heat exchanger 2, which radiates heat from the heated tubes to the surrounding air space, thereby heating it. The cooled water is then returned from the exchanger 2 through the outlet 23 to the heat source for further heating.

Example 2

This example also describes a low temperature heater for horizontal placement, as in Example 1, except that it is designed to be installed in the floor so that it is mirrored compared to Example 1.

The structural arrangement of the body is identical to that of Example 1, except that the insulation 11 is placed in the bottom and the sides and the casing 1 is closed from the top by a visible grid 3 of thicker perforated sheet. The heating process is the same as in Example 1.

Example 3

The low temperature vertical heating element (shown in Fig. 3 and Fig. 4) is intended for wall mounting. The heater consists of a housing 1 having side walls 13 and a rear wall 12 which are free of insulation 11. The front edges (not shown) of the side walls 13 are extended for a directional flow of air sideways through the grille 3, which is located on the front wall of the housing L

The heat exchanger 2 consists of coils 20 of cylindrical spring tubes arranged side by side and hydraulically connected to each other and connected to the hot water inlet 24 and hot water outlet 23.

The heat exchanger 2 is attached to the rear wall 12 of the housing 7 by means of fasteners 21 and screw connections 22.

The heating process is carried out in such a way that the heated water is supplied from a heat source (not indicated in the figure) via an inlet 24 to a heat exchanger 2, which radiates heat from the heated tubes to the surrounding air space, thereby heating it. The cooled water is then returned from the exchanger 2 through the outlet 23 to the heat source for further heating.

Example 4

This example also describes a low-temperature vertical heater, as in Example 3, except that it is designed for high-temperature building cooling.

The construction of the body is the same as in Example 3, but the process is different.

In the cooling process, unlike Example 3, the cooling water from the cooling source (not indicated in the figure) is fed to a heat exchanger 2, which radiates heat from the surrounding space by radiation, thereby heating the water and returning it to the cooling source.

Industrial usability

The technical solution can be used for low-temperature heating and high-temperature cooling of buildings such as schools, apartment buildings, office buildings, shops and family houses. The properties of low-temperature bodies predetermine their use in hot-water systems heated by renewable sources and in high-temperature cooling well water can be used as a cold source.

Claims (5)

PROTECTION REQUIREMENTS A low-temperature radiant heating element comprising a peripheral shell in which a heating element is located, characterized in that the heating element is formed by at least one tubular heat exchanger (2), which is inserted from the outside into the fixing clip (21), by means of which it is generally screwed (22) fastened to the rear wall (12) of the housing (1), one of which, other than the rear wall (12), is provided with a grille (3), the exchanger (2) being formed of at least one pillar A coil (20) which is made of thin-walled tubes and arranged in a cylindrical spring space and which is connected to the heating water inlet (24) and outlet (23). Heating element according to claim 1, characterized in that the set of coils (20) is arranged either side-by-side and / or one after the other and / or the coils (20) are pushed into one another, these being hydraulically interconnected. Heating element according to claim 1 and 2, characterized in that the grille (3) for the visual overlap and allowing the thermal radiation to be spread is removably disposed on the front face wall of the housing (1) for vertically placing the body on the room wall, The walls (13) of the housing (1) are extended below the lower edge of the exchanger (2) to direct the radiant flow into the space in the direction of the grille (3) and to prevent air flow. Heating element according to claim 1 and 2, characterized in that the grille (3) for the visual overlap and allowing the thermal radiation to be propagated is removably disposed on the front face wall of the housing (1) for horizontal placement of the body. below the ceiling of the rooms, the other walls of the jacket (1) being insulated (11) and the lower edges of the side walls (13) of the jacket (1) are extended below the lower edge of the exchanger (2) to target the radiant flow into the space in ) and to prevent air flow. Heating element according to claim 1 and 2, characterized in that the grille (3) for visually overlapping and allowing the spread of thermal radiation is removably placed on the front face wall of the housing (1) for horizontally placing the element in the floor of the room, the casings (1) are provided with insulation (11) and the lower edges of the side walls (13) of the casing (1) are extended below the lower edge of the exchanger (2).