Insulating glass element for the glazing of buildings

The invention relates to an insulating glass element for glazing building with higher utilization of the solar radiation energy from a white glass plate and a thereto arranged with spacing, other glass pane arrangement.

In the German Offenlegungsschrift 28 29 523 a window pane solar collector is described, consisting of an externally disposed crystal mirror glass pane and a distance therefrom arranged, thicker, in their mass green tinted interior glass is. The Crystal mirror glass pane carries on its inside a selective coating that only the short-wave light rays passes from the outside, but long-wave thermal radiation outwards not write. With this arrangement, should the sun energy falling on the windows Solar Panel applies, converted into usable heat and directly without transmission and storage heat losses delivered to the room interior or a service water heating are supplied.

In DE 41 25 834 C2 of the same applicant, such a glazed unit is described which for the passage of solar energy radiation, depending on the positioning of the radiation source having different transmission properties. This insulating element can be, depending on Positioning of the absorption plate to the radiation source towards the summer sun protection element with a low energy radiation passage, whilst in winter as a solar collector element use a high solar radiation energy passage. This known insulating glass element has a thermal insulation value of approximately k = 1.0 W / m²K on and is rotatable in a windowsill supported by 180 °, so that the insulating glass pane of her choice with one or the other may have surfaces to the outside of a room. This can be the cost of Cooling of equipped with such insulating glass panes spaces both in winter decrease in summer.

The summer in the position pointing outwards, not visible with respect to the predominantly in Range of the selective solar radiation absorbing pane of the insulating element formed absorbs the invisible portion of the solar energy spectrum and converts it into Heat energy, which is dissipated by convection and radiation to the outside atmosphere. Of the entire Energiedurchlaßgrad is in this position, the above k-value is only about g = 0.35.

In the winter position, the iron oxide-free or iron oxide reduction clear glass pane is outwardly and the selective absorption pane towards the interior facing. The solar radiation penetrates the outwardly facing white glass and strikes without significant absorption losses on the selectively absorptive glass pane. This glass plate converts about 50% of the solar spectrum, mainly in the non-visible range, in long-wave thermal radiation to which then, Disabled facing by a space between the panes, the emission of long-wave thermal radiation reducing coating (low-E coating) and an inert gas filling between the panes is radiated almost entirely into the room interior.

The total energy in sunlight is in the winter position almost g = 0.8 at the same K-value of approximately k = 1.0 W / m²K.

This concept, which can be called a solar diode and a mechanical reversal of the Radiant flux of the insulating glass element includes, permits thermal use of irradiated solar energy potential for relieving the heating balance in the winter and Transitional months and prevents excessive solar radiation in the summer months.

Despite these known beneficial effects of the insulating glass element according to DE 41 25 834 C2 is only the thermal barrier function, so the heat transfer coefficient of Insulating glass in the conventional construction technology in glass Gebäudehüllflächen a priority attention and rating received while the total energy, ie solar Utilization function of transparent glass surfaces is neglected contrast.

The glass industry has for large architectural glazings, ie quasi glass Structures with respect to the thermal insulation function insulating glass elements with excellent characteristics to the brought market, the k-values ​​of k = 1 W / m²K for Superagriseal Islolierglasgelemente and k values k = 0.7 and 0.5 W / m²have K for dreischeibige insulating glass elements.

Achieved are these values ​​through a single or double-sided coatings, the emission the hinder long-wave, solar radiation as well as by additional inert gas filling Disc spaces. Here, however, be substantial reductions of the g-value, ie the Gesamtenergiedurchlaßwertes accepted. In a three-pane insulating glass only even values ​​of g = 0.48 and reaches below, which means that over 50% of the Outer pane incident sun rays are rejected, that of the warming Interior thus no longer available.

Regardless of the energy losses due to the lack of adequate optimization of g-value in favor of a slightly improved k-value is determined by the glass industry for this Insulating conception proven advantage of both the winter heat insulation is suitable as well for the summer sun protection. Here, however, overlook the fact that a Improve the k-value by 0.3 and 0.5 W / m²K at a three-pane against a double disc glazing with a k value of k = 1 W / m²K, based on the achievable energetic gains, at least in the region of Central European climates, almost irrelevant is when it sets off him against the loss of the solar irradiation rate of 20 to 30%. These Irradiation rate in the heating season of winter and transitional months, even on a diffuse solar radiation on average 100 to 150 W / m² and in direct exposure to 300 600 W / m²Which can be exploited compensatory advantageously used for space heating. However, it should be noted that the solar irradiation rate in the winter and Transitional months on the day subject to large fluctuations in heavy cloud cover and very may drop low values.

In connection with DE 41 25 834 C2 it is known that the thermal comfort is decisively influenced by the temperature of the wall surfaces of the room. Even at more sufficiently room air temperature must not be below the temperature of the wall surfaces of the room decrease of the ambient air when the comfort is not to suffer. Deviations in temperature partial room area ratios as at glass windows in spite of given, optimal not allow thermal insulation values ​​avoid, cosiness is already severely impaired. Balanced wall temperatures are convective also to avoid air currents a essential for a comfortable indoor climate. If this is given, are already perceived ambient temperatures of 18 ° C pleasant than adequately, so that the lowering of Room temperature is normally required interior temperatures of 22 ° C to 18 ° C a significant savings in heating costs by about 25% yields.

The invention is based on the problem, the thermal comfort of interiors with large windows through the use of solar irradiation rate in the winter and sustainable and largely independent of the instantaneous weather to transition months improve.

Starting from this problem, in an insulating element mentioned at the outset proposed a way that it inventively a predominantly non-visible range of the solar Radiation spectrum absorptive glass pane arrangement with a high heat storage capacity , whose the clear glass pane facing surface with the emission of long-wave Heat radiation reducing coating (low-E coating) with a low emissivity is provided by E = 0.1, preferably E = 0.03.

The invention is based on the consideration that it matters, solutions for Maximizing the thermal benefits of the incident, the solar energy potential for relief locate the heating balance in the winter and transitional months, said through the Insulating element incident and the absorptive glass pane arrangement in longwave Thermal radiation transmitted solar energy directly in the disk element is compressed and temporally extended or withheld to be stored, not only short term but also longer lasting, compensate solar irradiation deficits. Due to the high Heat storage capacity of the absorptive glass pane arrangement can be the temperature level of facing the room glass long-term maintained constant, whereby a via the Space lying inside air temperature level of the space facing glass sheet is achieved, not only the thermal comfort of the room increases, but by lowering the Thermal transmittance of insulating glass element to a considerable extent the heat balance of the Interior improved.

The incident solar radiation penetrates the clear glass pane and falls to approximately lossless the facing the interior absorptive glass pane arrangement. Both permeating absorbed visible parts and the absorptive glass pane arrangement and on the in Heat energy transformed portions of the solar radiation spectrum come the interior benefit as the outwardly facing emission-reducing coating of the absorptive Glass pane arrangement prevents the heat radiation to the outside.

In addition, the outwardly facing surface of the absorptive glass pane arrangement also provided with the emission of long-wave thermal radiation reducing coating be. This arrangement is suitable, the storage capacity of the absorptive glass pane arrangement to increase. By the emission of long-wave thermal radiation-reducing coating is the Heat radiation also reduced toward the interior, and the stored in the disk Heat is raised to a higher temperature level and extended time at this level maintained.

With this coating, also the emissivity of the chamber side is additionally Wafer surface significantly reduced, whereby generally the heat transfer coefficient of Insulating element to a value of k = 0.8 W / m²K can be lowered. This is both advantageous in the winter position and in the summer position, when the invention is insulating glass element used in a window according to the DE 41 25 834 C2.

The coating can be applied by means of cathode sputtering. In this case, the to arrange for coating gas-filled space out because this coating no outside has sufficient long-term stability. Should an outside coating to be made, this is carried out as a pyrolytic glass coating.

The thermal benefits of the incident, solar energy potential can be increased additionally, when at least provided one surface of the clear glass pane with an antireflection coating becomes. The anti-reflection coating can be described as interference coating by means of a Magnetron system facing to the absorptive glass pane arrangement surface sputtered or applied on both sides in the dipping process, the immersion process applied coating is then baked. Since the reflections from the glass sheet make on each side for about 4% of the incident solar radiation, can be a sided coating a solar radiation gain of about 4%, with a bilateral Anti-reflective coating reach a solar radiation gain of about 8%.

During caused by the iron oxide-free white glass gain of 7 to 8% principally in longwave, so obtained in the invisible part of the solar spectrum, the profit which is by the reduction in reflection is achieved, primarily in the visible solar spectrum. Overall leaves by a coating on both sides and the use of iron oxide-free white glass Gain of solar Einstrahlquote impinging unhindered on the absorbing member, of about 15% reach. The profit that can be achieved through the reduction of reflection, on the one hand be used as a gain in light radiation for the room brightness, can be on the other hand, however, by separating the absorption bands of the absorptive glass pane arrangement also directly in Thermal radiation convert.

The inventive optimization of the thermal benefits of solar energy input can be in a simple and extremely advantageously already by increasing the thickness of the absorptive reach glass pane arrangement, preferably at least about twice the thickness of Clear glass pane is. If the clear glass pane has a thickness of 3 to 5 mm, the exhibit absorptive glass pane arrangement advantageously has a thickness of 6 to 12 mm. By the corresponding increase in the volume of the absorptive glass pane arrangement with the same size of the radiating surface of the glass sheet is a significant Heat charging the absorptive glass pane arrangement reached, so that the fluctuations the sunlight with partially cloudy skies or temporary temperature deficits on can be compensated for the room facing the disc surface.

With the formation of the absorptive plate assembly according to the invention with high Heat storage capacity is the incident in the space and converted into heat solar withheld radiant energy in the absorptive glass pane arrangement and here due to the increased mass over a prolonged period compacted saved instead of directly on impinge the broad wall surfaces of the interior, for the absorptive recording longwave thermal radiation typically are not optimally equipped.

In this way, despite temporary fluctuations in the radiation intensity increased Temperature level of the disc surface facing the space to receive, at the already low diffuse daylight irradiation, even in a northerly orientation of the window, temperature values identifies which lie above those of room temperature.

The realized by increasing the mass of the disk absorptive glass pane arrangement thermal storage and buffer concept thus affects advantageously in hiring a conducive and comfortable room climate from. The storage according to the invention and Buffer concept favored in daylight but also by the constant maintenance of a Temperature level of the room facing surfaces of the absorptive Glass pane arrangement above room temperature inside an effect of directly reducing on the transmission heat losses, that affects the effective k value of the insulating element. Achieved namely the surface temperature of the room facing absorptive Glass pane arrangement, the internal temperature of the room, so the effective k-value drops to a Value of k = 0. This results in a thermal barrier because of the outward Heat flow, characterized by the k value of the insulating member, namely, k = 1.1 W / m²K, by solar irradiation stored by the absorptive glass pane arrangement is compensated.

Exceeds the temperature of the absorptive glass pane arrangement, the air temperature inside the Space, the absorbed and stored by the disk solar radiation energy comes as Thermal radiation of the heating of the interior of the room directly benefit.

In unclouded sunlight surface temperatures even in winter absorptive glass pane arrangement up to 45 ° C is reached, ie, temperatures of the heat emission, corresponding to a mild radiant fireplace.

The storage and buffer concept according to the invention leads to an accomplished so far Proceeds benefit the incident solar energy. According to the g-value of the insulating element consists of recovered for space heating return from the heat radiation solar-generated or convective heat the absorptive glass pane arrangement of the interior and the through the insulating glass pane passing, immediate direct irradiation of the visible Range of the solar spectrum together. carries the short-wave radiation of the visible region in predominantly absorptive wall surfaces of the interior to its warming. Only a minor proportion of these short-wave radiation can the space above the disk surface again leaving. For long-wave heat insulating element of the invention is impermeable.

The to by the inventive storage and buffer concept the insulating glass element Total reaching solar yield benefits, as described and illustrated above, is in its full Extent clear if this benefit the performance of conventional insulating elements faces.

First, the gross amount of solar radiation by using a clear glass pane is to 7 - 8% higher. Assuming a three-pane insulating glass element, so you have to the Reflection and absorption losses of the central disc and the additional coating in buying take before the radiation impinges on the inner pane. This marks already the clear reduced g-value of a conventional insulating glass element.

In contrast, the achieved in this regard, most powerful, well-known in Isolierscheibenelement a three-pane construction with a krypton filling the gaps and two or three Low-E coatings only a k value of k = 0.4. The g value of this pane element is then at values ​​below g = 0.5.

The significant loss of use of the solar radiation are mainly limited by the Absorption capacity of the space facing float glass pane conditionally. Since this disc only 2 capable of absorbing up to 4% of the incident solar radiation, can also be only a fraction of the incident solar spectrum are transmitted in long-wave thermal radiation. A high proportion the solar radiation when it is not absorbed by the surfaces of the internal space, can therefore then unused after multiple reflections back through the glass surfaces of the window emerge.

This is immediately understandable, because for viewers from outside the Space Objects visible from the outside through the glass windows.

If bright, reflective curtains or drapes are present, can in this way up to 50% of the incident in the space solar radiation through the glass envelope surfaces without thermal Benefits are radiated outwards again.

Due to the increased mass, and thus the heat storage capacity of the absorptive Glass pane arrangement in conjunction with a clear glass pane results in a zweischeibiges Insulating glass element with a heat transfer coefficient of approximately k = 1.1 W / m²K, so that even if by very low or diffuse irradiation or by temporarily covered Cloudiness given irradiation deficits altogether in daylight a substantially constant Surface temperature of the absorptive glass pane arrangement is achieved which is at least equal to the air temperature of the interior is or above, whereby the invention Insulating element almost constant has an effective k value of k = 0th

To most favorable values ​​with respect to the transmittance of visible light and the to achieve absorption in the non-visible region of the solar radiation spectrum, has the Clear glass pane advantageously has a very low iron oxide content and is the absorptive Glass pane arrangement is at least partially designed as a so-called green glass pane. In particular, the absorptive glass pane arrangement formed as a massive green glass pane be so than glass with a high iron oxide content.

According to another advantageous Ausführungsforrn, the absorptive glass pane arrangement as at least two-layer laminated glass with a PVB interlayer film between the glass layers be formed.

The use of a designed as laminated glass, absorptive glass pane arrangement advantageous since an additional soundproofing effect is achieved. This soundproofing effect can be still by the use of an intermediate film having a greater thickness than usual, of for example 1 to 2 mm and / or improved by specific film compositions. By the use of laminated glass is further burglary safety glazing means the insulating glass element according to the invention increased.

In addition, it is possible, the degree of absorption and the remaining light transmittance as well as the Storage capacity of the constructed as a laminated glass, absorptive glass pane arrangement to expand by the transparent intermediate film molecular layers or pigmentations be introduced that and to a sharper separation between the short-wave, visible lead the long-wave, non-visible range of the solar spectrum. Also can thereby an absorption of the UV component of solar radiation with the benefit of an effective UV radiation protection for materials inside the room and an additional energy yield in reach the absorption element of approximately 5%. In addition, there is also the Possibility, the function of the absorptive glass pane arrangement, alone or in large part of the assign intermediate film.

For reasons of security breach, it is advantageous, at least one glass plate of the Insulating glass element, preferably the absorptive glass pane arrangement, comprising at least one to provide glass sheet or layer of toughened or heat-strengthened glass antigenic differences in temperature is largely insensitive.

To a very high heat storage capacity of the absorptive glass pane arrangement to achieve, can this apart from two sheets of glass and a sealed therebetween arranged, made of visible light transparent fluid with a high heat storage capacity, wherein the fluid for example water, in particular from kolloidvernetztem water exist, can having an approximately five-fold higher specific heat with respect to glass. The Heat storage capacity of the liquid can be characterized by a high proportion of dissolved metal salts yet continue to increase, with these metal salts can be selected such that it also to an absorption help the non-visible region of the solar radiation spectrum. The liquid may also consist of a homogeneously dispersed hydrogel of high viscosity.

A contribution to the invention, thermal storage and buffering of heat converted, solar radiation energy does generally a filling of Zwischenraurns between the clear glass pane and the absorptive glass pane arrangement with a noble gas, preferably Krypton, which also reduces the heat radiation to the outside, wherein the width of the The gap can then be advantageously about 10 mm. When using a 5 mm thick clear glass pane, a 12 mm thick, the absorptive glass pane arrangement and a Gap width of 10 mm, for example, a perfectly normal thickness of the insulating element of 27 mm. Insulating glass elements of this thickness and design can be more readily use windows of the type described in DE 41 25 834 C2.

In the case of krypton filling and a low-E coefficients of the insulating glass element reaches 0.03 already has a k value of k = 1 W / m²K.

The memory inventive concept can be advantageously by combination with a complete electrical resistance heating of the absorptive glass pane arrangement.

Almost all low-E coatings, both applied by cathode sputtering and the pyrolytically applied coatings, are electrically conductive. They can be as warm surface resistance layers electrically and in that space radiation heating systems use.

As well as in the heating of motor vehicle rear-wall glazing, it is possible already known, printed on the insulating glass panes absorptive conductor systems in the screen printing process. Alternatively, as provided in heatable composite windshields, a barely visible line network of fine wires in the intermediate film of the absorptive laminated glass construction to get integrated.

This transmission system can also be applied to an additional, facing your room, from the absorptive glass pane arrangement a minimum distance of 15 mm comprising glass Attach.

The actual inventive concept lies in the idea of ​​linking the compensatory electrical heating of the absorptive glass pane arrangement with the irradiated and stored solar energy. This is done in such a manner that an absorptive in the Glass pane arrangement integrated temperature sensor, the electric heater always turns on when the temperature of the inner pane solarerwärmten a predeterminable Temperature level, in particular the temperature level of the inner air room, not reached, or temporarily decreases to a level below that level.

In this way, the space-facing surface of the absorptive temperature Glasseheibenanordnung constant over time with the respective inner temperature of the room matched with the result that a constant effective k value of k = 0 over the entire Heating period is maintained constant.

Likewise by the local climatic benefits are already at a minimum Energy expenditure maintained constant over the heating season, since the electric defogger always only the difference between the solarerwärmten inner pane and the room inside temperature compensated, which also then advantageously lowered without sacrificing comfort at 18 to 20 ° C is.

Through a flexible, demand-driven temperature control of the windows-heating can, especially in larger proportion of window area of ​​Raumhüllflächen, in conventional heating systems waive that cause comparatively far higher operating and maintenance costs, irrespective the required investment costs.

Assuming a good insulation standards of other space and Gebäudehüllflächen gives the solar radiation absorbing and storing, highly insulated Insulating glass pane arrangement in compensatory coupling with the electrically powered and in the absorptive glass pane arrangement integrated, flat heating system in the illustrated Art an excellent and very cost-effective approach for winter heating, and in Connection to the diode effect of a rotatable window system and the summer Cooling of a low energy building.

If the temperature of the absorptive glass pane arrangement by means of electrical heating on a Temperature kept higher than the room temperature, the insulating glass element can in use advantageously as radiant heating for the room temperature control.

By means of a differentiated control electronics that the disc temperature and the inputted Room temperature into consideration, let a and temporal needs such as heating up Night setback, achieve matched control.

The advantages of this concept are first in its economy, with the savings to Energy, operating and maintenance costs, but in particular on the savings to investivem Costs include.

Of importance is also given a conducive radiation climate of the interior, the Profit of living comfort and hygiene in housing.

Ultimately earned the ecological aspect of this concept attention because it succeeds here Sunlight also in Central European widths for air conditioning in buildings in an optimal Way to use.

The invention is described with reference to several illustrated in the drawing Embodiments described. In the drawings:<dl tsize="7"><dt>Fig. 1</dt><dd>a cross-section through a window with an inventive Insulating element according to a first embodiment,</dd><dt>FIG. 2</dt><dd>a partial sectional view of an insulating glass element according to the invention according to a second embodiment, </dd><dt>Fig. 3</dt><dd>a partial sectional view of an insulating glass element according to the invention according to a third embodiment and</dd><dt>Fig. 4</dt><dd>a partial sectional view of an insulating glass element according to the invention according to a fourth embodiment.</dd></dl>

A window with an insulating glass element according to the invention is only schematically in cross-section illustrated and includes a fixed building frame 1 of conventional type. In an appropriate Neck of the frame 1 is fitted a sash 2 and the window frame 1 a Pivot 5 pivotally supported in the form of a conventional band. This Flugelrahmen 2 is the window frame 1 with double stop on.

An insulating element made of a clear glass pane 11 and a spaced to absorptive mainly in the non-visible region of the solar radiation spectrum Green glass pane 4 is comprised of an insulating glass element frame. 3 By means of the individual not , Arranged as shown in the vertical center axis of the insulating member 4, 11 Turning joint 6 allows the insulating glass element 4, 11 with the insulating glass element frame 3 in turn sash 2 after releasing a lock not shown by 180 ° and again lock.

In the region of a side surface of the insulating glass element frame 3 is attached to a circumferential projection of the frame 1, a circumferential seal 7 is arranged to which the Insulating glass element frame 3, when the window is closed, and thereby creates the seal guaranteed. It can be seen that by this, a seal 7 is a complete sealing of the The window sash is ensured without an additional seal between the Insulating element frame 3 and the sash 2 is required. Nevertheless, it may in certain Auwendungsfallen be expedient further seals 8, 26 between the Insulating element frame 3 and the sash frame 2 and / or between the window frame 1 and to arrange the window sash frame 2, without this, however, in most applications, necessary is.

The parallel to the line extending through the turning joints 6 turning axle outer surfaces 9 of Insulating glass element frame 3 are rounded with a radius to the turning axle distance equivalent. The corresponding inner surfaces 10 of the sash 2 are also rounded so that the insulating glass element frame 3 can be fitted into the casement 2 with little play. The insulating glass element frame 3 runs internally flush with the frame 1, so that a each strip 27 (paneling) made of metal or plastic profiles both the frame 1 as can also cover the sash. 2 In this way, repeated paints save. In a conventional turning Casement would have separated for this purpose the Frame and planking in addition to turning vane latter, on both sides.

The green glass plate 4 has at least about twice the thickness of the clear glass pane 11, and consisting of toughened or heat-strengthened glass. Preferably, the thickness of the Clear glass pane 11 between 3 and 5 mm, while the green glass pane has a thickness between 6 and having 12 mm. The pitch of the clear glass pane 11 of the green glass pane 4 preferably about 8 to 12 mm, and the so formed, sealed by means of conventional spacers Intermediate chamber 12 is filled with an inert gas, preferably krypton filled.

On the interspace 12 facing surface of the green sheet of glass 4 is an emission longwave thermal radiation arranged 13 (low-E coating) reducing coating.

The position shown in Fig. 1 of the insulating element 4, 11 is the winter position in which the in the green glass pane 4 having a high heat storage capacity due to its thickness, Stored heat is radiated to the building toward the interior. Thereby, the Interior temperature and / or the comfort increases. The coating 13 causes the in the green glass pane 4 radiated heat stored substantially to the building toward the interior becomes.

In the 180 ° rotated summer position is stored in the green glass pane 4 in heat radiated substantially outwardly or dissipated by convection, so that the heat output for Interior is down considerably reduced.

If you want to use insulating elements with the highest possible heat storage capacity, reach Glass thicknesses for the absorptive glass pane arrangement as solid glass pane no longer can be produced inexpensively. Therefore, the embodiment of FIG. 2 from a two-layer laminated glass with a PVB intermediate film 16 between the glass layers 14, 15th Both the clear glass pane 11 and the glass layers 14, 15 may have the same thickness of have, for example 5 mm, so that when a distance between the discs 11, 14 by 10 mm and a thickness of the PVB intermediate film of 1 mm has a total thickness of the insulating element 25 mm is achieved. The arrangement of reducing the emission of long-wave thermal radiation Coating 13 is the same as in the embodiment of FIG. 1.

By relatively thick PVB interlayer film 16 that the usual level of about 0.75 mm exceeds, in addition to improve the sound insulation function of this insulating element reached, the pressure is heightened at a heating of the film by the heated glass material.

The embodiment of FIG. 3 has a three-layer laminated glass of the glass panes 14, 15, 17 and the PVB interlayer films 16, 18 on the total thickness of this arrangement is the same molecular as the embodiment of FIG. 2 can in the intermediate sheets 16, 18 Layers or pigmentations as absorptive medium for the longer-wave, non-visible Spectral range and / or the UV component of sunlight to be introduced. At this Embodiment is an extra, the emission of long-wave thermal radiation reducing Coating 19 on the outwardly facing surface of the absorptive glass pane arrangement 14, 15, 16, 17, arranged 18th By the coatings 13, 19, the radiation is the stored heat in both directions for Disabled, thereby advantageously increasing the Temperature of the absorptive glass pane arrangement and a temporally extended storage of Heat, but in particular a considerable reduction of the k-value of these Glass pane arrangement is effected.

In the embodiment of FIG. 4, the absorptive glass pane arrangement of two spaced glass panes 14, 15 and an example with a visible light permeable fluid 20 filled with high heat storage space. If this Fluid taken 20 water or colloidally crosslinked water, the heat storage capacity can be at triple same dimensions almost since the specific heat of water over the Five times the amounts of glass. If certain metal salts dissolved in water, can be the Heat capacity further increase and the absorption in the liquid to certain Vote wavelength regions of the radiation spectrum.

The fluid 20 may also consist of a homogeneous dispersion of high viscosity hydrogel to at high insulating elements to reduce the effects of the hydrostatic pressure.

Even if the absorptive glass pane arrangement according to FIG. 1 to 4 no the exhibit emission of long-wave thermal radiation-reducing coating, is the inventive advantageous aspect of the heat storage in the absorptive given glass pane arrangement, since the increased heat storage capacity is maintained. In this case insulating element of the invention acts not as a solar diode by itself Swiveling 180 ° can bring in a summer position and a winter position, however, is in given this case a simplified window formation without possibility of pivoting opposite normal windows with insulating glass panes without heat storage improved comfort guaranteed even during brief fluctuations in the sunlight.

The electrically conductive coatings 13, 19 can be used as electrical resistance surface heating be used for the insulating glass element according to the invention. Alternatively, electrical resistance conductors by screen printing on the absorptive glass pane arrangement 4; 14, 15, 16; 14, 15, 16, 17, 18 can be applied, or electrical resistance heating wires (not shown) in the Intermediate film (s) 16, 18, which is designed as laminated glass absorptive glass pane arrangement 14, 15, 16; be 14, 15, 16, 17, 18 stored. The resistance surface heating can also be on a additional, the space facing, of the absorptive glass pane arrangement 14, 15, 16; 14, 15, 16, 17, 18 arranged at a minimum distance of 15 mm comprising glass.

A temperature sensor 21 on the absorptive glass pane arrangement 14, 15, 16, 17, 18 on the Heating system 13, 19 a when the temperature of the absorptive glass pane arrangement has a predeterminable temperature, in particular falls to or below the internal room temperature, or they not reached.

If the temperature of the absorptive glass pane arrangement by the electric heater to maintained a temperature above room temperature, can be according to the invention Insulating element use as radiant heating for the room temperature control.

The temperature control by means of a differentiated, not shown control electronics can be two-stage design. There may be provided a basic level, each only at the existing thermal transmission loss rate balancing oriented to the k-value equal to zero constant over time to maintain.

In the second stage, a higher temperature for space heating can be under Set the same time considering the corresponding increase in transmission losses. there are both stages on the respective, entering the room, the global solar energy component coupled, resulting from the direct radiation, diffuse radiation and the reflective Irradiation results. The internal heat sources of the room are taken into account.

Such, electrically heatable insulating glass element is particularly suitable as Waistline surface element of a storey-high glazing. The sill plate element can be used as may be turning element formed with summer and winter position and an absorptive Pane arrangement with a higher degree of absorption of about 70% of the incident solar have radiation, including visible components. This sill plate element then much less transparent than the glazed elements overlying, but at Spandrel glazing not as part storey high glazing elements, a high incidence of light required.

The electrical resistance heater is made with an extremely low energy consumption, even when insulating element of the invention is used as the sole heating element. This requires the optimal use of solar radiation through the highly selective absorptive pane structure with a large heat storage capacity.

Especially for low energy houses with a high standard of insulation can be the Insulating element of the invention as the sole heating concept advantageously use.

As a pure radiant heating system, respectively on demand flexibility, this results in an extremely efficient and cost effective heating system with the benefit of creating a comfortable and physiologically conducive room climate.