SK123693A3 - Element for surface heating or cooling - Google Patents

Abstract

Heating element (1) for surface heating, having a cavity (3) for transporting the heat transfer medium and a jacket (2), made from plastic and/or metal, enclosing the cavity, characterised in that the jacket is constructed in such a way that its outer surface assumes different temperatures even when the heat transfer medium passes through in a uniform fashion. The heating element can in principle also be used to cool surfaces, if a cooling medium is used instead of the heat.

Description

Surface element Brickwork or cooling

The invention relates to a surface heating or cooling element provided with a channel for conveying a heat transfer or cooling medium with a plastic or metal casing? that surrounds the canal as well as the surface heating. especially the flooring, which is essentially constructed of these elements

Previous .. status ..t.g £ hQxky.

From the patent AT-B-378,846, heating pipes of metal or plastic with a round ball are known. oval or elliptical cross section of tubular floor. more pleasing. Pipes stored heating? I feel the most per person on the same channel · Problems-and arealiness lies in the surface temperature?

places not for everyone in solidifying or hardening media? does it cause relatively large temperature differences? so-called ripple on a heated surface.Very often it causes discomfort and in addition does not meet the essential requirements. For example, underfloor heating.Our heating should have a low temperature for medical reasons · equal temperature on the whole surface of the heated surfaces.for economical reasons low input temperature and low temperature ·

Summary of the invention .....

The above-mentioned drawbacks are largely eliminated by a surface heating or cooling element provided with a channel for the conveyance of a heat transfer or cooling medium, with a plastic or metal sheath that surrounds the anal, which is based on the sheath having a different thermal conductivity The surface heating or cooling according to the invention may have a jacket of different thicknesses. It will be shown that the heat dissipation can be controlled in a simple way such that the surface heating element has a greater thickness at a location adjacent to the surfaces to be installed. . It is necessary to heat up in comparison with bands where the elements are close to each other.

The sheath of the surface heating or cooling element is in part provided with a material that is a poor heat conductor or a material that conducts heat worse than the material from which the sheath is composed. This can be achieved, for example, by having an insulating slot filled with air.

The heating element according to the invention has an oval or elliptical channel, preferably circular.

FľrehÍ ad. .pictures in drawings

Fig. 1 shows the typical temperatures and corrugations of a 150 mm thick pipe with a 40 ° C inlet temperature for the four pipes shown in cross-section in Fig. 2. As the inlet temperature changes, the ripple can be substantially increased. For health reasons, the temperature of the underfloor heating should be below the surface temperature of the feet (this cannot be the same as the body temperature of the human body, so that heat is transferred to the floor in the urine). 2 The explanation of the ripple in FIG. 1 is clearly from oor. 2, which shows four heating pipes in cross-section that are installed above the thermal insulation (shown by spiral lines) in a flooring material whose boundary is indicated by horizontal lines. Each tube is known, what kind of one cross-section, transmits heat evenly over the entire surface / heat radiation is indicated by the arrows / so occurs oezprostredne above and below the top tube _with hitherto known cross-sections of the highest and the lowest surface temperature of the pipes on the floor and thermal insulation.

oor. 3 shows the tube. _of plastic according to the invention, with a channel 3 with a circular internal cross-section and a reinforced wall 2a, 2b from top to bottom. The ends of the pipe to the distributor connection can be turned, so that a welded or screwed connection can be made safely and easily.

oor. 4 is a view of the turned one, amplification ste..y 2a, 2b and channel 3 seen in the direction A has been shown to be substantially the plowing heating _tube> the converted in this way, when installed in a known spôsooom the coil lines or grooves, temperature ripples.

oor. j is a pipe _of plastic aleut metal of circular internal cross-section, with reinforced wall from top to bottom, and disposed therein an insulating Stroin 6, which ensures heat removal requirements of the present invention. Pipe ends. 4 are turned round in accordance with FIG. 4 and can be welded safely or simply or by screw connection.

Fig. 6 shows a metal tube with a circular, inner cross-section with plastic insulation, placed from top to bottom, which can be provided both with and without an insulating slot, again ensuring heat dissipation according to the invention. Ends of runek k

Λ.S. ·

4 the connections of the distributor according to FIG. 4 are turned round.

The surface heating or cooling elements according to the invention can be installed by all known fastening devices, such as pipe clamps, retaining rails, base plate and according to current standards, possibly hot and cold installed, by reinforcing the zone of the element according to the present invention. According to the invention, which is diverted from the heating surface to be heated, on the one hand, the heat loss in the floor can be reduced and, on the other hand, they can be connected as inlet manifolds and return manifolds permanently connected to the heating elements (possibly welded). 7, which shows a longitudinal and cross-sectional view of a plastic collecting tube with a circular channel L and a wall thickness of a reinforced top-down bottom. In this reinforced wall, the distribution pipes can be placed perpendicularly or directly through the large collecting tubes.

5. at variable distances at the connection points 4 which are not disconnectable - thus collecting tubes can be made by an extrusion process with a very high time strength and very cost-effective, while at the same safe connection point 4 · The passage from the eventually return pipe runs to reaming 1, thereby forming a stop at the same time for not disassembling the other connecting rod by welding or otherwise permanently joining the heat distribution pipes. into the inlet and return pipe is of great importance since the division of the hot water stream from the inlet pipe into a plurality of manifold heat pipes gives rise to corresponding advantages in terms of pressure drop and flow velocity and low pressure drop and low flow velocity caused by heat pumps. which have low power consumption and at the same time noiseless operationSoposiai known joining techniques, the insertion of heat distribution pipes into tubes with relatively low wall thickness entails the danger that the joints may become leaky under high permanent loads · Plastic parts cast by spraying have a lower time strength and durability as extruded plastic pipes with the same wall thickness

Permanent connections or other permanent connections should be made in such a way as to guarantee the greatest possible safety for a long period of time, up to the diameter of the heat distribution pipe used. 1 ad, a heat distribution tube with a diameter of 8 mm, inserted into the collecting tube, should have a connection depth of about 8 mm. The following example illustrates the invention in more detail.

Concrete example :

The surface heating element was made of polypropylene with the cross-section shown in Fig. 3, using a conventional extrusion technique, with the following dimensions:

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thickness and the walls / Mm / in plane 0 ": 2.0 thickness the walls / mm / in plane 30 °: 2.5 thickness the walls / Mm / in plane 60 °: 3.5 thickness the walls / Mm / in plane 90 °: 4.0

Inner diameter / mm / tubular duct with 20

This element was pumped hot water / inlet temperature of 40 ° C, 3 l / min · /, measured temperatures on the inner tube and outer surface of the comb: · inner tube temperature 40 ° C

out k i sia temperature IN plane 0 °: 38.23 ° C outside and outside temperature in plane 30 °: 37.92 ° C von k.aj šia temperature in plane 60 °: 37.35 ° C outside and outside temperature in plane 90 °: 37.07 ° C

By providing different wall thicknesses, the surface temperature of the surface heating element can be varied and, as a result, in the case of underfloor heating, the heat dissipation to the floor surface can be changed accordingly. that the temperature ripple is equalized. Changing the surface temperature is all the more. the greater the different wall thicknesses or slits formed in the tube ·

The surface heating or cooling element according to the invention can also be used as a surface cooling element, while uniform surface cooling (avoiding temperature ripples) is achieved.

Claims (1)

PATENT DRUMS A surface heating or cooling element provided with a conduit for conveying a heat transfer or cooling medium, with a plastic or metal sheath surrounding the channel, characterized in that the sheath (2) has a different thermal conductivity along its circumference2- cooling according to claim 1, characterized in that the jacket (2) has a different thickness (2a, 2b) The surface heating or cooling element according to claim 1 or 2, characterized in that the jacket (2) is partly provided with a material (6) with heat Conductivity inferior to the Conductivity of the Sheath (2) 4- The surface heating or cooling element according to claim 1, 2 or 3, characterized in that the channel (3) is designed as oval or elliptical. 2 or 3, characterized in that the channel (3) is designed as a circular -