US20120055194A1

US20120055194A1 - Vacuum sorption device

Info

Publication number: US20120055194A1
Application number: US13/293,700
Authority: US
Inventors: Andreas Bornmann; Belal Dawoud; Peter Hoefle
Original assignee: Viessmann Werke GmbH and Co KG
Current assignee: Viessmann Werke GmbH and Co KG
Priority date: 2010-06-10
Filing date: 2011-11-10
Publication date: 2012-03-08

Abstract

A vacuum sorption device includes a volume area, in which a sorbent which periodically sorbs and desorbs a refrigerant is situated and which is formed at least partially enclosed by a condenser. The condenser is bounded by an outer wall of the volume area and a further enclosure wall. Alternately at least one of the outer wall and the enclosure wall is provided with embossments oriented toward the respective other wall to fix a flow gap width in the condenser.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

Applicants claim priority under 35 U.S.C. §119 of German Application No. 20 2010 007 821.0 filed Jun. 10, 2010. Applicants also claim priority and this application is a continuation under 35 U.S.C. §120 of International Application No. PCT/DE2011/001228 filed Jun. 3, 2011, which claims priority under 35 U.S.C. §119 of German Application No. 20 2010 007 821.0 filed Jun. 10, 2010. The international application under PCT article 21(2) was not published in English. The disclosures of the aforesaid International Application and German Application are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a vacuum sorption device including a volume area, in which a sorbent which periodically sorbs and desorbs a refrigerant is situated and which is formed at least partially enclosed by a condenser, the condenser being bounded by an outer wall of the volume area and a further enclosure wall.
2.The Prior Art
A vacuum sorption device of the type mentioned at the beginning is known according to DE 10 2004 049 411 A1.It consists of a volume area, in which a sorbent (for example, zeolite), which periodically sorbs and desorbs a refrigerant (such as water) is situated and which is formed at least partially enclosed by a condenser, the condenser being bounded by an outer wall of the volume area and a further enclosure wall.
The mode of operation and all further components of this vacuum sorption device are described in detail in DE 10 2004 049 411 A1.Reference is made thereto in its entirety for the sake of simplicity.
In addition, for the sake of completeness, reference is also made to DE 36 25 247 A1 and its English-language equivalent U.S. Pat. No. 4,739,631, which discloses a similar embodiment with respect to the condenser.

SUMMARY OF THE INVENTION

The invention is based on the object of further improving a vacuum sorption device of the type mentioned at the beginning.
This object is achieved with a vacuum sorption device of the type mentioned at the beginning by providing the outer wall and/or the enclosure wall alternately with embossments oriented toward the respective other wall to fix a flow gap width in the condenser.
It is thus provided according to the invention that alternately the outer wall and/or the enclosure wall is/are provided with embossments oriented toward the respective other wall to fix a flow gap width in the condenser.
In other words, it is provided according to the invention that the width of the flow gap between the outer wall and the enclosure wall is precisely defined with the aid of a plurality of embossments. On the one hand, this ensures that the gap width has the desired dimension over the entire height of the condenser. On the other hand, through a corresponding flow influence of the fluid flowing through the condenser, it encourages the heat transfer between the volume area enclosing the sorbent and the condenser.
Other advantageous refinements of the vacuum sorption device according to the invention are discussed below.
For the sake of completeness, reference is additionally also made to DE 589 823 A, from which a periodic absorption refrigerator is known. A so-called corrugated plate (reference sign 10) is known therefrom, but it is situated outside the condenser (reference sign 9).

BRIEF DESCRIPTION OF THE DRAWINGS

The vacuum sorption device according to the invention, including the advantageous refinements thereof, will be explained in greater detail hereafter on the basis of the illustration in the drawing of a preferred exemplary embodiment.

In the FIGURE:

The sole FIGURE shows the vacuum sorption device according to the invention in section (not to scale).

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The vacuum sorption device shown in the sole FIGURE consists in a known way, inter ails, of a volume area 1, in which a sorbent 2 (zeolite here [ not shown in greater detail]), which periodically sorbs or desorbs a refrigerant (water here), is situated and which is formed at least partially enclosed by a condenser 3, the condenser 3 being bounded by an outer wall 4 of the volume area 1 and a further enclosure wall 5.
It is essential for the illustrated vacuum sorption device according to the invention that the enclosure wall 5 is provided with embossments 6 oriented toward the outer wall 4 to fix a flow gap width in the condenser.
Alternatively (not shown), however, it can also be provided that the outer wall 4 is provided with embossments 6 oriented toward the enclosure wall 5 to fix a flow gap width in the condenser. In addition, it can finally be provided (also not shown), that the outer wall 4 and the enclosure wall 5 are each provided with embossments 6 oriented toward the respective other wall 4, 5 to fix a flow gap width.
These measures result in a condenser structure which is distinguished, on the one hand, by high (pressure) stability and, on the other hand, by good heat transfer, with simple production ability.
As shown in the sole FIGURE, it is provided that the outer wall 4 of the volume area 1 and the enclosure wall 5 are formed as cylindrical, so that a cylindrical ring gap space results between the outer wall 4 and the enclosure wall 5. Furthermore, the cylindrical outer wall 4 is formed in the preferred embodiment as between 400 and 500 mm tall and between 250 and 350 mm in diameter.
Furthermore, it is particularly preferably provided that a gap, which is defined by the embossments 6, between the outer wall 4 and the enclosure wall 5 is formed as less than 2 mm wide, preferably less than 1 mm. Particularly good flow distribution inside the condenser can be achieved in that the embossments 6 are situated uniformly distributed on the enclosure wall 5 and between 10 and 40 mm, preferably 20 to 30 mm, away from one another. Furthermore, it is preferably provided that the embossments 6 are formed in the form of spherical caps and have a diameter of 1 to 2 mm.
Furthermore, as is obvious from the sole FIGURE, a collector housing 7 is situated on both ends of the cylindrically formed enclosure wall 5. It is preferably formed integrally and in the form of a bead from material of the enclosure wall 5, furthermore, a connection 8 for alternately supplying or removing a fluid being provided on each collector housing 7 and the connections 8 on the collector housings 7 being situated offset to one another with respect to the circumference.
With respect to simple manufacturing or assembly, it has proven to be advantageous if the enclosure wall 5 is formed as a prefinished part having the embossments 6 and preferably as fastenable by being pushed on to the outer wall 4, which is formed as free of embossments 6, and being fluid-tight thereon (in particular by welding on).

LIST OF REFERENCE NUMERALS

1 volume area
2 sorbent
3 condenser
4 outer wall
5 enclosure wall
6 embossment
7 collector housing
8 connection

Claims

What is claimed is:

1. A vacuum sorption device, comprising a volume area (1), in which a sorbent (2) which periodically sorbs and desorbs a refrigerant is situated and which is formed at least partially enclosed by a condenser (3), the condenser (3) being bounded by an outer wall (4) of the volume area (1) and a further enclosure wall (5), wherein alternately the outer wall (4) and/or the enclosure wall (5) is/are provided with embossments (6) oriented toward the respective other wall (4, 5) to fix a flow gap width in the condenser.

2. The vacuum sorption device according to claim 1, wherein a gap, which is defined by the embossments (6), between the outer wall (4) and the enclosure wall (5) is formed less than 2 mm wide.

3. The vacuum sorption device according to claim 1, wherein the embossments (6) are situated uniformly distributed on the enclosure wall (5) and at a distance of between 10 to 40 mm, preferably 20 to 30 mm from one another.

4. The vacuum sorption device according to claim 1, wherein the embossments (6) are formed in the shape of spherical caps and preferably have a diameter of 1 to 2 mm.

5. The vacuum sorption device according to claim 1, wherein the outer wall (4) of the volume area (1) and the enclosure wall (5) are formed as cylindrical.

6. The vacuum sorption device according to claim 5, wherein a collector housing (7) is situated on at least one end of the cylindrically formed enclosure wall (5).

7. The vacuum sorption device according to claim 6, wherein the collector housing (7) is integrally formed from material of the enclosure wall (5) and is preferably in the form of a bead.

8. The vacuum sorption device according to claim 6, wherein a connection (8) for alternately supplying or removing a fluid is provided on the collector housing (7).

9. The vacuum sorption device according to claim 8, wherein connections (8) on the collector housings (7) are situated offset to one another with respect to the circumference.

10. The vacuum sorption device according to claim 1, wherein the enclosure wall (5) is formed as a prefinished part having the embossments (6) and preferably so it can be pushed onto the at least one collector housing (7) on the outer wall (4), which is formed free of embossments (6).