DE8212753U1 - DRIVER FOR A SORPTION HEAT PUMP - Google Patents

Description

Joh. Vailiant GmbH u. C

GM 347

August 13, 1982

Expeller for a sorption heat pump

The present trfinciung refers to a sorption = heat pump according to the preamble of the main claim.

Expellers have become known which are designed as so-called columns. With them, the expeller is located at the lowest end of the column, directly above it is a rectification area with rectification trays, and a condenser or reflux condenser is arranged in the top of the column. The lowest area of the column is heated by a gas, oil or solid burner, whereby the rich solution collected in the expeller is separated into refrigerant vapor (NH ₃ ) and solvent (H ₂ O).

It has now proven to be relatively difficult for the Training of the expeller as part of a column to heat the expeller sufficiently.

The present invention is based on the object of creating an expeller for a sorption heat pump in which a sufficient heat transfer from the exhaust gases of the burner into the column bottom is possible.

In addition, the invention is based on the object of ensuring a natural circulation of the solvent in the area of the expeller without pumping additional drive means such as solvents or the like.

This problem is solved with the characterizing features of the main claim.

This enables an increased and usually sufficient heat transfer from the exhaust gases of the burner to the solvent content of the expeller.

Due to the features of the secondary claim, a solvent circulation is also achieved without additional funds.

Further refinements and particularly advantageous further developments of the invention are the subject matter of the dependent claims or gsher. from the following description, which has an embodiment of the invention to the content.

In the figure is a schematic cross-sectional illustration a column containing an expeller of a sorption heat pump shown in more detail.

A column 1 of an otherwise not shown Sorption heat pump for heating a central heating system and / or a domestic hot water tank consists of a roughly cylindrical steel case, which in its middle Area 2 is designed as a rectifier with rectification trays 3 and upper courses 4 is at its upper end provided with a cover 6 and at its lower end 7 with a base 8, the cover and base being convex curvatures exhibit. A reflux cooler 9 is located in the upper area 5, and the lower area forms an expeller 10.

The column 1 protrudes with its lower region 7, that is to say the expeller, into a housing 11 which has a combustion chamber 12 encloses, being between the housing and the combustion chamber

Il I

III *

there is clearance on all sides. The combustion chamber 12 is heated by a burner 13, which is via a feed line 14 in which a control valve 15 is arranged, is supplied with fuel.

In the rectification area 2 opens a line 16, the rich solution ζ coming from the absorber leads. From the lowest point of the bottom 8 a line 17 goes off, the poor Solution ς leads to the absorber. Above the bottom

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Rectification floor 18 of the rectification area 2 a line 19 goes off, which leads to a lower point 20 of a slope provided between burner 13 and bottom 8 arranged lamellar heat exchanger 21 leads, the upper end 22 of which is connected to a line 23 which leads back into the area of the expeller 10 of the column 2, but opens at a much lower level, when the line 19 leaves the column. The mouth region 24 of the line 23 is at a height level that lies between the floor 8 and the rectification floor 18. The level is preferably above the level 25 of solution in the expeller.

The celebration space 12 is via an exhaust gas discharge 25 with the Connected atmosphere. Fresh air for the burner 13 is supplied to the combustion chamber 12 on the underside.

The function of the column just described is as follows: During operation, the burner is opened when the fuel valve 15 is open supplied with fuel and air, its flames heat the lamellar heat exchanger 21. Due to the static pressure gradient between the column-side openings of the lines 19 and 23 a forced circulation of heated solution occurs through the heat exchanger, so that the solution from the lowest rectification tray reaches the interior 26 of the expeller, so that a middle level 25 sets.

Since when the solution is heated in the area of the heat exchanger, refrigerant vapor is already released, It is a preferred feature of the invention that the tubes of the heat exchanger 21 starting from the narrowest Extend the area at the lowest point 20 to the higher point 22. For this reason this or that also owns Tubes 23 have a larger overall cross-section than tube 19,

After the solution reaches the interior 26 of the expeller 10 under depletion, since the refrigerant vapor is already partially expelled in the course of the heat exchanger 21, it is heated further here, since the vessel bottom 8 of the column 2 at its end or sides facing the combustion chamber 12 with ribs or lamellae is provided in order to ensure a good heat transfer from the exhaust gases to the interior space 26 of the expeller 10.

Claims (8)

Jon. Vaiilant GmbH u.Co GM 347 August 13, 1982 claims 1. Expeller for an absorption heat pump with a furnace that protrudes into a furnace that is heated by a burner Vessel, characterized in that the side of the vessel (2) facing the combustion chamber (12) is provided with heat exchange elements (27) is provided. 2. Expeller according to claim 1, characterized in that the heat exchange elements consist of ribs. 3. Expeller according to claim 1, characterized in that the heat exchange elements consist of bolts. 4. Expeller according to claim 1, characterized in that the heat exchange elements consist of approaches. 5. Expeller for an absorption heat pump with an in a furnace with rectification floors protruding from a burner, characterized in that, that from the lowest rectification tray (18) a line (19) goes off, which leads to a below the vessel (2) arranged heat exchanger (20) leads, the second connection line (23) at a height at a distance from lowest rectification tray (18) and the bottom of the vessel (8) flows out. > II »! ■ ■■ ■. ζ · ' 6. Expeller according to claim 5, characterized in that the heat exchanger (21) is arranged inclined. 7. Expeller according to claim 5 or 6, characterized in that that the cross section of the heat exchanger widens towards the end (22) at a higher level. 8. Expeller according to one of claims 5 to 7, characterized in that that the end (22) of the heat exchanger located at a higher level is connected to the line (23) is, which opens at the lower level in the expeller (10).