DE1551333A1 - Absorption unit - Google Patents

Description

Disclosure Records

Dr.R./very. January 15, 1970

Vorwerk & Co.
56 Wuppertal-Barmen

Mühlenweg 17 - 37

Absorption cooling unit

The invention relates to an absorption cooling unit pressure-equalizing gas, a cooker with a downstream steam rectification section and one indirectly from the impoverished one Solution called thermosiphon pipe,

Absorption cooling units with a pressure compensator, inert auxiliary gas can be designed for two-stage or multi-stage evaporation. For example, the first evaporator stage at low temperatures the cooling compartment and the second evaporator stage at warmer temperatures the normal cooling compartment a combined high-temperature refrigerator. It is then important for the regulation that the cooker of the absorption cooling unit with two input powers can be operated. If the input power is low,

only produces just as much refrigerant as for the supply of the freezer compartment evaporator is necessary. With high input power more refrigerant is generated and with the

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The medium-temperature evaporator becomes the medium-temperature evaporator fed.

In addition to the correct design of the evaporator and gas heat exchanger, the two-stage cooker required for this requires a special adaptation and a special structure. This applies in particular to the Th'irmosiphon pump, which is necessary for the Uralauf the absorption solution and for this in the mode of operation of a vapor bubble pump Solution raises to a higher geometrical level. These Therxosiphon pumps are used in the well-known oysters

heated
either directly from the Kocner / or indirectly from the solution.

It is difficult to design the cooker with a pump in such a way that it can operate over a large performance interval of for example 1: 5 or: .ie works satisfactorily. Even if with one or the other type of stove the If the solution run is maintained, the water content changes of the evacuating condensate plume and the relative solution circulation too strong when the input power is changed.

This also applies to the cookers known per se (DBP 1062260), in which the energy required for the pump is essentially at the boiling point of the

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poor solution is supplied and where in addition a There is a heat-insulated pump pipe for almost the entire height of the rise.

The object of the present invention is to provide an absorption cooling unit of the generic type in terms of production technology to create a simple structure, in which a trouble-free and satisfactory operation in a considerably enlarged Power range, at least approximately to almost 1: 5 is available.

This is achieved according to the invention in that the pump chamber of the thermosiphon pump is in a side dome of the digester housing is located, which is connected to the digester via an adapted passage opening with reduced cross-section. housing interior is connected and in which the side Opening cross-section for the return flow of the poor solution and the inlet opening of the pump tube arranged one above the other are.

According to the invention, an advantageous embodiment consists in that the lateral opening cross-section for the return flow of the poor solution is turned away from the passage opening with reduced cross-section.

Furthermore, it is advantageous if, according to the invention, a

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Point rupture point between the pump pipe and the Kocher riser pipe is provided approximately in the area of the rectification section.

Another advantageous feature of the invention is that the side dome crossing, the return for the poor solution in the form of an inner pipe, the inlet for the rich solution in the form of an annular gap forming pipe the dome at a deviation from the vertical, for example at an angle of 15 to 20, crosses.

Finally, another solution according to the invention is that an approximately horizontally lying digester housing is provided is that carries the side dome on one end face.

As a result of this configuration, the structure is simplified a significantly increased working stability of the absorption cooling unit achieved. The cooling unit works completely evenly over a surprisingly wide performance interval. It is extremely stable against interference. The heating of the geometrically strictly defined pump chamber by the poor Solution over a, measured over the entire length of the digester housing, relatively short zone through the return zone poor solution and due to the possible transfer of conduction heat from the Kockergehäusewandung to the side dome, they are essential reasons for this great work stability and the large performance range. The cross-section adjustment the passage opening for the poor solution from the interior of the cooker housing in the side dome allows easy adjustment. Turbulent phenomena in the side adoiti are best ex-

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uses. The latter is especially true when the lateral Opening cross-section for the return flow of the poor solution is turned away from the passage opening with reduced cross-section. If further heat energy is supplied to the pump pipe from the Kocher riser pipe via the spot weld, this takes effect stabilizing especially with low input powers. The first time still proposed solution that the Side dome on the face of the approximately horizontally lying Seated digester housing, brings considerable in terms of the assignment of the digester housing to the total liquid level structural and work-related advantages.

The object of the invention is shown in two exemplary embodiments on the accompanying drawing. Show it;

Fig. 1 an overview of the for the cooker important parts of the absorption cooling unit,

Fig »2 is a side view of the cooker, partially in section,

Fig.3 is a side view of the cooker, partly in section, the second embodiment and

Fig. K is a front view of this, eDenfa ^ n ^ / in section.

The absorption cooling unit has the digester 1 »This is formed by the digester housing jacket 2 and by the ileizpatronenrohr 3, which is located concentrically to the inside. The digester housing interior k is located between the two.

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The riser pipe 5 connects to the cooker 1 · It forms the rectification section 6, preferably through a suitable rectification insert 7> for example in a sieve structure, which is immediately behind the exit from the Cooker 1 is located.

The cooker 1 has the side dome 8. This is through the welds 9 in a thermally conductive connection with the Cooker housing jacket 2.

An adapted cross-section reduced passage opening allows the return of the poor solution from the digester housing interior k into the interior 11 of the side dome.

The side dome 8 is crossed by the tube 12. This tube 12 has an inner tube 12 'which is inside the side dome 8 emerges from the outer tube 12 with the opening cross-section 13 · Through this opening cross-section the poor solution flows out according to the arrow χ. The annular gap 1 ^ between pipe 12 and inner pipe 12 'is used to Inflow of the rich solution.

Above the lateral opening cross section 13 is the Inlet opening 15 of the pump tube 16 is arranged. In the inlet opening 15 occur in the underlying Pump chamber 17 generated vapor bubbles and rise in the Pump tube 16 upwards. The pump tube opens into the

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Speaking distance above the rectification section 6 at the point 18 in the riser 5 a.

A spot welding point 19 between the pump pipe 16 and the riser pipe 5 ensures additional heat transfer from the riser pipe 3 to the pump pipe 16. In addition and / or the pump pipe 1'6 can also be equipped with an external / preferably over the entire length of a heat-insulating jacket.

In the embodiment according to Fig. 3 and k , the digester 1 is essentially horizontal. The side endome 8 is attached to one of its end faces 20. The adapted cross-sectional, reduced passage opening 10 ¹ is located in the end wall 20 of the digester housing ».

The tube 12 crosses the side dome at an angle KX * which deviates from the vertical and is approximately 15 to 20. As from ■; Fig »k ersichS.ich, extending the drilling 12 in the rest of a secant through the dome 8. In addition, located in front of the angle P to the vertical, of approximately 5-10.

In both configurations, the tube 12 passes through both opposing walls of the side dome 8 Weld seams 21 bring the seal to the Dorawandung. That Pump tube 16 occurs in the area of the protruding end

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12 ″ of the tube 12 in this one and is in manufacturing technology advantageously only sealed against the tube 12 outside the dome 8 by the weld seam 22.

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Claims (1)

563/564 January 15, 1970 A η proverbs 1. Absorption cooling unit with pressure-equalizing gas, a cooker with a downstream steam rectification section and a thermosiphon pump indirectly heated by the impoverished solution, characterized in that the pump chamber (17) of the thermosiphon pump is located in a side dome (8) of the cooker housing, which is adapted via a Reduced cross-section through opening (10 or 10 ') is connected to the digester housing interior (k) and in which the lateral opening cross section (13) for the return of the poor solution and the inlet opening (15) of the pump tube (16) are arranged one above the other. '2. Absorption cooling unit according to claim 1, characterized in that that the lateral opening cross section (13) for the return of the poor solution is turned away from the passage opening (10 or 10 ') of reduced cross-section. 3- absorption cooling unit according to claim 1, characterized through a spot weld (19) between the pump pipe (16) and the Kocher riser pipe (5) approximately in the area of Rectification section (6). 00981 5/07 T 3 _n , " _Kt - _At ORIGINAL BATHROOM k. Absorption cooling unit according to claim 1 and 2, characterized in that the one which crosses the side dome (8) and forms the return for the poor solution in the form of an inner pipe (12 *) and the inlet for the poor solution in the form of an annular gap (14) Tube (12) crosses the dome (8) at a deviation from the vertical, for example by an angle {X) of 15-20. 5. absorption cooling unit according to claim 1, characterized by an approximately horizontally lying cooker housing, the carries the side dome (8) on one end face (20). 009815/0713 BATH ORIGINAL