INSULATING GLAZING AND USE THEREOF

Abstract

An insulating glazing having a pressure-equalizing body, includes a first pane, a second pane, a peripheral spacer between the first pane and the second pane, wherein the spacer includes a hollow main body having at least two parallel pane contact walls, an outer wall, and a glazing interior wall and a bore opening through the outer wall and contains a desiccant arranged in the hollow main body. The hollow main body extends between the first and second panes along a periphery and, along this periphery, a partition wall extends through the hollow main body transversely to the periphery. An inner interpane space is formed between the first pane, the second pane, and the spacer, and a hollow pressure-equalizing body for pressure equalization between the inner interpane space and the surroundings of the insulating glazing. The pressure-equalizing body includes a surrounding outer wall and a gas-permeable membrane.

Claims

1. An insulating glazing having a pressure-equalizing body, comprising: a first pane; a second pane; a peripheral spacer between the first pane and the second pane, wherein the peripheral spacer comprises a hollow main body having at least two parallel pane contact walls, an outer wall, and a glazing interior wall as well as a bore opening through the outer wall and contains a desiccant arranged in the hollow main body, wherein the hollow main body extends between the first pane and the second pane along a periphery and, along said periphery, at least one partition wall extends through the hollow main body transversely to the periphery, wherein an inner interpane space is formed between the first pane, the second pane and the spacer, and at least one hollow pressure-equalizing body for pressure equalization between the inner interpane space and the surroundings of the insulating glazing, wherein the pressure-equalizing body comprises a surrounding outer wall as well as a gas-permeable membrane fastened within the pressure-equalizing body and is connected to the peripheral spacer via the bore opening, wherein each pressure-equalizing body is arranged at a distance of less than 20% of the periphery of the hollow main body from a partition wall associated with the pressure-equalizing body, wherein the glazing interior wall, proceeding from the partition wall toward the pressure-equalizing body, is implemented with a region impermeable to water vapor and the impermeable region extends along at least 20% of the periphery of the hollow main body, wherein a blind is arranged in the inner interpane space, wherein the membrane is implemented as a water vapor barrier that has water vapor permeability of more than 50 g/(day m.sup.2) and less than 400 g/(day m.sup.2) measured in accordance with the method ASTM E96-10, and wherein the hollow main body is filled with desiccant along at least 80% of its entire periphery.

2. The insulating glazing according to claim 1, wherein the hollow main body is filled with desiccant along at least 84% of its entire periphery.

3. The insulating glazing according to claim 1, wherein the pressure-equalizing body is arranged in an outer interpane space between the first pane and the second pane.

4. The insulating glazing according to claim 3, wherein a sealing compound is arranged around the pressure-equalizing body in the outer interpane space between the first pane and the second pane.

5. The insulating glazing according to claim 1, wherein the pressure-equalizing body is arranged in the upper third of the insulating glazing, based on the operational installation position on and/or in a window frame.

6. The insulating glazing according to claim 1, wherein the pressure-equalizing body is arranged in a vertical region of the insulating glazing, based on the operational installation position on and/or in a window frame.

7. The insulating glazing according to claim 1, wherein an inner interpane space delimited by the first pane, the second pane, and the glazing interior wall of the peripheral spacer is filled with air.

8. The insulating glazing according to claim 1, wherein the gas-permeable membrane implemented as a water vapor barrier has water vapor permeability measured in accordance with the method ASTM E96-10 of more than 70 g/(day m.sup.2) and less than 350 g/(day m.sup.2).

9. The insulating glazing according to claim 1, wherein the blind is connected to and can be operated with a magnetic coupling.

10. The insulating glazing according to claim 1, wherein the blind is connected to and can be operated with an electric motor.

11. The insulating glazing according to claim 10, wherein the electric motor is connected to a cable that passes out of the inner interpane space through a permeable region of the glazing interior wall into the hollow main body and is routed in the hollow main body from the permeable region to the impermeable region, and is routed out of the hollow main body through the outer wall in the region of the impermeable region.

12. The insulating glazing according to claim 11, wherein the cable is routed along at least 50% of the length of the region of the hollow main body impermeable to water vapor through the hollow main body.

13. The insulating glazing according to claim 11, wherein the cable is routed into the peripheral spacer in the outer wall adjacent the pressure-equalizing body.

14. The insulating glazing according to claim 1, wherein the first and second panes have a distance between them of at least 25 mm.

15. A method comprising arranging an insulating glazing according to claim 1 as building interior glazing, building outer glazing, and/or façade glazing.

16. The insulating glazing according to claim 1, wherein the impermeable region extends along at least 30% of the periphery of the hollow main body.

17. The insulating glazing according to claim 16, wherein the impermeable region extends along at least 50% of the periphery of the hollow main body.

18. The insulating glazing according to claim 1, wherein the hollow main body is filled with desiccant along at least 87% of its entire periphery.

19. The insulating glazing according to claim 8, wherein the gas-permeable membrane implemented as a water vapor barrier has water vapor permeability measured in accordance with the method ASTM E96-10 of more than 100 g/(day m.sup.2) and less than 300 g/(day m.sup.2).

20. The insulating glazing according to claim 19, wherein the gas-permeable membrane implemented as a water vapor barrier has water vapor permeability measured in accordance with the method ASTM E96-10 of more than 120 g/(day m.sup.2) and less than 250 g/(day m.sup.2).

21. The insulating glazing according to claim 12, wherein the cable is routed along at least 75% of the length of the region of the hollow main body impermeable to water vapor.

22. The insulating glazing according to claim 14, wherein the first and second panes have a distance between them of at least 30 mm.

23. The insulating glazing according to claim 22, wherein the first and second panes have a distance between them of at least 40 mm.

Description

[0062] In the following, the invention is explained in detail with reference to drawings. The drawings are purely schematic representations and, consequently, not to scale. They in no way restrict the invention. The drawings depict in:

[0063] FIG. 1 a schematic partial side view of the insulating glazing according to the invention;

[0064] FIG. 2 a schematic view of the entire periphery of a spacer of an insulating glazing according to the invention;

[0065] FIG. 3 a schematic view of the entire periphery of another spacer of another insulating glazing according to the invention; and

[0066] FIG. 4 a cross-section of an edge region of an insulating glazing according to the invention with a pressure-equalizing body.

[0067] FIG. 1 depicts a schematic partial side view of the insulating glazing according to the invention. Arranged between a first pane 1 and a second pane 2 is a spacer 3 that has a hollow main body, whose outer wall 4c is discernible. The hollow main body further has a pane contact wall 4a facing the first pane 1, a pane contact wall 4b facing the second pane 2, and a glazing interior wall (not shown). The spacer 3 is connected to a pressure-equalizing body 8 that is arranged in an outer interpane space 10 that is situated between the first pane 1 and the second pane 2. The outer interpane space 10 is filled with a sealing compound (not shown). The pressure-equalizing body 8 is hollow and has an outer wall 8a and, in the interior, a gas-permeable membrane 8b. The gas-permeable membrane 8b is implemented as a water vapor barrier that has water vapor permeability of more than 50 g/(day m.sup.2) and less than 400 g/(day m.sup.2) measured in accordance with the method ASTM E96-10.

[0068] FIG. 2 depicts a schematic view of a spacer of an insulating glazing according to the invention, as depicted, for example, in FIG. 1. The view depicts the spacer 3 in cross-section in the operational installation position of the insulating glazing in and/or an a window frame (not shown). The spacer 3 has the hollow main body 4 that is rectangular.

[0069] The hollow main body 4 is completely filled with desiccant 6 along its periphery. It is formed from the pane contact wall (not shown) facing the first pane (not shown), the pane contact wall (not shown) facing the second pane (not shown), the outer wall 4c, and the glazing interior wall 4d. The pressure equalization within the spacer 3 filled with desiccant 6 is done by the pressure-equalizing body 8, which is arranged on the outer wall 4c in the upper third in the vertical region of the spacer 3. The outer wall 4c has, for this purpose, a bore opening 5, through which the pressure-equalizing body 8 is connected to the spacer 3. Arranged at a distance of less than 20% of the periphery of the hollow main body 4 is a partition wall 7 associated with the pressure-equalizing body 8, which partition wall 7 extends through the hollow main body 4 transversely to the periphery. The glazing interior wall 4d is implemented with an impermeable region 9a, proceeding from the partition wall 7 toward the pressure-equalizing body 8. The impermeable region 9a extends along 50% of the periphery of the hollow main body 4. Also, the glazing interior wall 4d has, proceeding from the partition wall 7 in the direction facing away from the pressure-equalizing body 8, a permeable region 9b, which also extends along 50% of the periphery of the hollow main body 4. The first pane (not shown), the second pane (not shown), and the glazing interior wall 4d of the spacer 3 delimit an inner interpane space 13. Arranged in the inner interpane space 13 is a blind 12, which is adjustable from a closed position, which is depicted, into an open position and positions therebetween. Optionally, the blind is housed in a top box (not shown) in the closed position. The position of the blind 12 can be changed by means of a drive (not shown), for example, a magnetic coupling.

[0070] The hollow main body 4 is outwardly gas-tight everywhere except for the built-in pressure-equalizing body 8. The partition wall 7 is likewise implemented gas-tight. The permeable region 9b of the glazing interior wall 4d has openings 16 that are introduced into the glazing interior wall 4d such that, in this region, they enable a gas exchange between the hollow main body 4 and the inner interpane space 13. The openings 16 are formed as slots with a width of 0.2 mm and a length of 2 mm. The slots ensure an optimum air exchange without desiccant being able to penetrate out of the hollow main body 4 into the inner interpane space 13 of the glazing. Preferably, the hollow main body 4 is made of a gas-permeable material, with the impermeable region 9a of the glazing interior wall 4d and the outer wall 4c being provided with gas-impermeable insulating films or thin layers (not shown).

[0071] The pressure equalization within the spacer 3 filled with desiccant 6 is done, as already described, by the pressure-equalizing body 8. A stream of air entering through the pressure-equalizing body 8 flows by capillary action of the spacer 3 filled with desiccant 6 first along the impermeable region 9a. The stream of air passes the desiccant 6 introduced into the hollow main body of the spacer 3, while, at the same time, an air exchange between the hollow main body 4 and the inner interpane space 13 of the insulating glazing is prevented. Thus, the stream of air is first pre-dried in the impermeable region 9a of the spacer 3 before it then enters, in the following permeable region 9b, into the inner interpane space 13 of the insulating glazing. Thus, the long-term stability as well as the insulating effect can be further improved, as a result of which a longer service life of the glazing is achieved. Moreover, the insulating glazing conforms to the standards relative to a reduction in dewpoint to −30° C. within 24 h after production.

[0072] FIG. 3 depicts a schematic view of another spacer of another insulating glazing according to the invention. The spacer 3 depicted in FIG. 3 corresponds to the spacer depicted in FIG. 2 with the difference that it has a further pressure-equalizing body 8 and a further partition wall 7 associated with this pressure-equalizing body 8, a segmented impermeable region 9a, a segmented impermeable region 9b, and a further bore opening 5. The view depicts the spacer 3 in the operational installation position of the insulating glazing in and/or on a window frame (not shown). The spacer 3 has the hollow main body 4 that is rectangular and is completely filled with desiccant 6 along its periphery. The hollow main body 4 is formed from the pane contact wall (not shown) facing the first pane (not shown), the pane contact wall (not shown) facing the second pane (not shown), the outer wall 4c, and the glazing interior wall 4d. The pressure equalization within the spacer 3 filled with desiccant 6 is done by the two pressure-equalizing bodies 8, which are in each case arranged in the upper third in the vertical region of the spacer 3 on the outer wall 4c. The outer wall 4c has two bore openings 5, through which the pressure-equalizing bodies 8 are each case connected to the spacer 3. Arranged at a distance of less than 20% of the periphery of the hollow main body 4 is in each case a partition wall 7 associated with the pressure-equalizing body 8, which extends through the hollow main body 4 transversely to the periphery in a gas-tight manner. The glazing interior wall 4d is implemented with an impermeable region 9a, proceeding from the respective partition wall 7 toward the pressure-equalizing body 8. The impermeable region 9a extends, in all, along 50% of the periphery of the hollow main body 4 but is segmented into two opposite sections. Moreover, the glazing interior wall 4d has, in each case proceeding from the partition wall 7 in the direction facing away from the pressure-equalizing body 8, a segmented permeable region 9b, which extends, in all, along 50% of the periphery of the hollow main body 4. The impermeable region 9a and the permeable region 9b have in each case two segments. The segments of the impermeable region 9a and of the permeable region 9b are alternatingly arranged. The glazing interior wall 4d is implemented along longitudinal sides of the rectangular hollow main body 4 as impermeable region 9a; whereas along transverse sides of the rectangular hollow main body 4, it is implemented as permeable region 9b.

[0073] Also, depicted in FIG. 3 is a drive for the blind 12 situated in the inner interpane space. The drive has an electric motor 14 that is arranged in the inner interpane space 13. The electric motor 14 is connected to a cable 15 that passes out of the inner interpane space 13 through a permeable region 9b of the glazing interior wall 4d into the hollow main body 4 and is routed in the hollow main body 4 from the permeable region 9b to the impermeable region 9a and is guided out in the region of the impermeable region 9a through the outer wall 4c out of hollow main body 4. The cable 15 is routed in the outer wall 4c adjacent the one pressure-equalizing body 8 in the spacer 3 via the bore opening 5. Such a drive can also be used in the spacer depicted in FIG. 2.

[0074] The pressure equalization within the spacer 3 filled with desiccant 6 is done, as already described in connection with FIG. 2, by the pressure-equalizing body 8. If the routing of the cable 15 through the outer wall 4c is is not to be airtight, a stream of air entering it flows by capillary action of the spacer 3 filled with desiccant 6 first along the impermeable region 9a. The stream of air passes the desiccant 6 that was introduced into the hollow main body 4 of the spacer 3; whereas, at the same time, an exchange of air between the hollow main body 4 and the inner interpane space 13 of the insulating glazing is prevented. Thus, the stream of air is first pre-dried in the impermeable region 9a of the spacer 3 before it then enters into the inner interpane space 13 of the insulating glazing in the following permeable region 9b. By means of this routing of the cable 15, the long-term stability as well as the insulating effect can be further improved, as a result of which a longer service life of the insulating glazing is achieved.

[0075] FIG. 4 depicts a cross-section of an edge region of an insulating glazing according to the invention, which is depicted, for example, in FIG. 2 or FIG. 3. Arranged between the first pane 1 and the second pane 2 is the spacer 3 having the hollow main body 4, of which an outer wall 4c and a glazing interior wall 4d are depicted. An outer interpane space (not shown) between the first pane 1 and the second pane 2 is filled with a sealing compound 11, for example, organic polysulfide. The hollow pressure-equalizing body 8 is connected to the spacer 3 via the bore opening 5 in the outer wall 4c. The pressure-equalizing body 8 has an outer wall 8a and a gas-permeable membrane 8b, which is implemented as a water vapor barrier that has water vapor permeability of more than 50 g/(day m.sup.2) and less than 400 g/(day m.sup.2) measured in accordance with the method ASTM E96-10. The blind 12 is arranged in the inner interpane space 13, which is delimited by the first pane 1, the second pane 2, and the glazing interior wall 4d.

LIST OF REFERENCE CHARACTERS

[0076] 1 first pane [0077] 2 second pane [0078] 3 spacer [0079] 4 main body [0080] 4a pane contact wall [0081] 4b pane contact wall [0082] 4c outer wall [0083] 4d glazing interior wall [0084] 5 bore opening [0085] 6 desiccant [0086] 7 partition wall [0087] 8 pressure-equalizing body [0088] 8a outer wall [0089] 8b gas-permeable membrane [0090] 9a impermeable region [0091] 9b permeable region [0092] 10 outer interpane space [0093] 11 sealing compound [0094] 12 blind [0095] 13 inner interpane space [0096] 14 electric motor [0097] 15 cable [0098] 16 opening