Vertically arranged heat pump and method of manufacturing the vertically arranged heat pump

1. A heat pump, comprising:

an evaporator having an evaporator bottom wall and an evaporator top wall;

a liquefier having a liquefier bottom wall and a liquefier top wall;

a gas region extending between the evaporator and the liquefier and formed to guide evaporated working fluid from the evaporator to the liquefier, so that the evaporated working fluid is liquefied in the liquefier, and

a return channel for returning liquefied working fluid from the liquefier into the evaporator, wherein the return channel comprises one or more nozzle openings from the liquefier to the gas region, and wherein the one or more nozzle openings are formed in a portion of the liquefier bottom wall adjacent to the gas region so that the liquefied working fluid is sprayed into the gas region due to a pressure difference between the liquefier and the gas region, the pressure difference being present in an operation of the heat pump,

wherein the heat pump comprises a setup direction for the operation of the heat pump, wherein the liquefier bottom wall is arranged above the evaporator top wall with respect to the setup direction for the operation of the heat pump, and wherein the setup direction for the operation of the heat pump is so that in the operation of the heat pump; the evaporated working fluid is transported from a bottom of the heat pump upwards and so that the liquefied working fluid flows from a top of the heat pump downwards.

2. The heat pump according to claim 1 , further comprising:

a compressor arranged between the evaporator and the liquefier in vertical direction, wherein the compressor is formed to compress evaporated working fluid and feed the compressed working fluid into part of the gas region comprising higher pressure than the evaporator in the operation of the heat pump.

3. The heat pump according to claim 1 , further comprising:

a return channel for returning liquefied working fluid into the evaporator, wherein the return channel is formed so that liquefied working fluid moves from the top down with respect to the setup direction for the operation of the heat pump.

4. The heat pump according to claim 3 , wherein the return channel comprises a throttle valve and is formed to be pumpless.

5. The heat pump according to claim 2 , further comprising:

a further compressor arranged laterally to or above the liquefier to even further compress, and feed into the liquefier, compressed evaporated working fluid from the part of the gas region.

6. The heat pump according to claim 1 , wherein the gas region comprises a liquid collecting point, and wherein a further portion of the return channel passes from the liquid collecting point to the evaporator to give liquid collected in the gas region off into the evaporator, wherein the further portion comprises one or more further nozzle openings from the liquid collecting point to an evaporation space of the evaporator, and wherein the one or more further nozzle openings are formed in a portion of the evaporator top wall so that the liquid collected in the gas region is sprayed into the evaporation space of the evaporator due to a further pressure difference between the liquid collecting point and the evaporation space, the further pressure difference being present in the operation of the heat pump.

7. The heat pump according to claim 1 , wherein the nozzle openings and the further portion comprise holes formed such that a certain amount of liquid can pass through the holes at a predetermined pressure difference, wherein the certain amount of liquid is so large that a level in the liquefier remains in a target range in the operation of the heat pump.

8. The heat pump according to claim 1 , wherein a first compressor below the liquefier and above the evaporator and a second compressor above the liquefier are arranged in the gas region, wherein the gas region extends between the two compressors, and wherein the gas region extends around the liquefier.

9. The heat pump according to claim 1 , wherein a circulation pump is formed in the liquefier to generate a liquid flow in an area of the liquefier from the bottom upward, so that working fluid having flown from the bottom upward can be brought into contact with the compressed working gas.

10. The heat pump according to claim 1 , wherein the working fluid is water and the evaporated working fluid is water vapor, and

wherein a pressure in the evaporator in the operation of the heat pump is less than 50 mbar, and wherein a pressure in the gas region in the operation of the heat pump is less than 200 mbar.

11. The heat pump according to claim 1 , wherein the gas region is formed to surround the entire wall of the liquefier in contact with the liquefied working fluid in the operation of the heat pump.

12. The heat pump according to claim 1 , wherein the liquefier is dimensioned so that a liquid volume of more than 200 liters is disposed in the liquefier in the operation of the heat pump.

13. The heat pump according to claim 1 , wherein a wall of the liquefier, a wall of the gas region, and a wall of the evaporator are formed of plastic.

14. The heat pump according to claim 1 , wherein a process water tank separated from the liquefier via a gas region is arranged in the liquefier.

15. The heat pump according to claim 1 , comprising a cylindrical housing, in which the evaporator, the liquefier, two compressor stages and the gas region are accommodated.

16. The heat pump according to claim 15 , comprising the following connections:

an evaporator inflow and an evaporator outflow, a heating flow and a heating return, a process water flow, a process water supply and a circulation return.