DE102008012598A1 - Condensate-reguiding device for absorption cooling system, has stopper arranged at upper end of outer tube, and inner tube closed at bottom, where another outer tube surrounds inner tube, and outlet is arranged at latter outer tube - Google Patents

Abstract

The device has an arrangement of siphon (1), which consists of an inner tube (2), and an outer tube (3) that surrounds the inner tube. A pressure balance stopper (4) is arranged at an upper end of the outer tube. The stopper has an outlet (5) in form of pipeline, and another siphon arranged downstream to an output of the siphon. Another inner tube is directed downward and closed at the bottom, and another outer tube surrounds the latter inner tube. Another outlet is arranged at the latter outer tube.

Description

The The invention relates to a return device for one adsorption chiller according to the features of claim 1.

A Return means used in an adsorption refrigeration system to that while maintaining one depending on operating conditions fluctuating pressure difference, a discharge of a fluid, in particular a refrigerant, between different components of the adsorption refrigeration system Ensure that a continuous flow of the fluid is ensured becomes. This concerns in particular a flow of liquefied refrigerant from a condenser to an evaporator in a refrigerant circuit the plant.

The Return means contributes contributes to an optimized process efficiency of the plant therefore an important component. It is especially on a preferably space-saving arrangement of the return device in the association of adsorption refrigeration plant as well as the process efficiency of the plant as possible optimal fluid flow in the recycling device to secure.

Of the Invention is the object of a compact return as possible specify, with the greater pressure fluctuations within the adsorption refrigeration system can be compensated and secured an optimal influence of the fluid flow in the system can be.

The solution This object is achieved with a return device with the features of the claim 1. The following subclaims include expedient and / or advantageous embodiments the device according to the invention.

The Inventive return device comprises one of a fluid flow through Arrangement of a first siphon. This consists of a downward first inner tube, a closed down, the inner tube enclosing first outer tube and a first one located at an upper end of the outer tube Pressure equalization pot with a first outlet. At the first exit of the first siphon is a second siphon with a downward second inner tube, one closed at the bottom, the second Inner tube enclosing the second outer tube and a second outlet located at the upper end of the second outer tube intended.

It is thus resorted to a siphon arrangement in which the pressure differences between each arranged before and after the return device Components of the adsorption refrigeration system over levels in the Siphon arrangement can be compensated. The height of the siphon arrangement determines the maximum pressure difference of the return device thus formed can be compensated. Is appropriate an interconnection, in which the siphon arrangement a second Siphon arrangement is connected downstream. The necessary height to compensate the maximum expected pressure difference is thereby on both Siphon devices divided. This will minimize the Space requirement of the return device achieved.

The thus formed device may advantageously at least one cascaded to the second output of the second siphon subsequent further Have siphon. By doing so leaves the necessary height the entire recycling facility at a given pressure difference further minimize or the Return means on an arbitrarily large in itself adjust the maximum pressure difference constructively.

At least one of the siphons has a completely surrounding the respective outer tube, adjoining the respective pressure equalization pot, which can be flowed through by the fluid sheath with an exit on. In such a particularly advantageous embodiment will be the outer tube of the concerned siphons of the between the casing and the outer tube circulating fluid flows around. This can cause heat transfer between the fluid inside the outer tube and that in the lumen between the outer tube and the sheath fluid can be achieved. By a Such flow guidance of Fluids may be the embodiment of the recirculation device thus formed at the same time for a preheat or precooling of the streaming Fluids are used. The process efficiency of the adsorption refrigeration system is thereby optimally influenced.

at an expedient embodiment has at least one of the siphons one at the respective pressure equalization pot connected pressure compensation line on.

The Return means will be described below using exemplary embodiments be explained in more detail. It will be for the same or equivalent parts use the same reference numerals. It shows:

1 a constructed from only a siphon return device in a sectional view,

2 a return device constructed of three siphons,

3 a constructed from two siphons return device, wherein one of the siphons a having flow-through casing,

4 in the 3 shown return device in a sectional view,

5 a side view of in 3 and 4 shown return device,

6a another side view of in 3 and 4 shown return device,

6b a top view of the in 3 and 4 shown return device.

1 shows one out of just one siphon 1 existing return device in a sectional view. The siphon consists of an inner tube 2 that in an outer tube 3 ushers. The pipe 3 is completed at the bottom. At the upper end of the outer tube is a pressure equalization pot 4 arranged, from which an exit 5 branches off in the form of a pipeline. Via flange or welded connections 5a can the inner tube 2 or the output 5 be switched between two components of the adsorption refrigeration system. The fluid flowing through the siphon passes over the inner tube 2 into the lumen of the outer tube 3 one, goes into the pressure equalization pot 4 and leaves the siphon over the exit 5 , A pressure compensation line 18 leads from the pressure equalization pot in which the return device downstream component and compensates for pressure fluctuations in the flowing fluid.

The Inner tube of the return device is at an adsorption refrigeration plant connected to a drain port of a condenser tray during the Exit in an evaporator sump of an evaporator opens. Under In these conditions, the fluid is a collected in the condenser tray liquefied Refrigerant that the inner tube completely fills. Dependent on from a pressure difference between the condenser tray and the evaporator sump becomes the liquid refrigerant lowered in the inner tube. The continuously flowing from the condenser tray liquid refrigerant will follow inside the outer tube pushed up into the pressure balance pot. The pressure compensation line ends in this case, in the evaporator and ensures an always consistent Pressure over the refrigerant.

The height the return device, d. H. the length the inner and outer tube, depends on the expected pressure differences. These will ultimately in a fluctuating level of the fluid transferred in the space between the inner and outer tube.

Larger pressure fluctuations or differences can be achieved by a 2 compensate for exemplary cascade of several siphons. As a result, unreasonably long lengths of the individual siphons can be avoided. At the in 2 As shown, the cascade consists of three siphons. Each of the siphons each includes a sub-section through which the fluid flows. The embodiment shown here is thus composed of three sections. The exit 5 of the first siphon 1 leads to a substantially identical second siphon 6 and is with its inner tube 7 connected. The inner tube 7 is with another outer tube 8th surrounded and has at its upper end another pressure equalization pot 6a on.

An exit 9 of the second siphon leads into a substantially identical third siphon 10 and is with its inner tube 11 connected. This inner tube is according to the previous versions with another outer tube 12 surround. The outer tube 12 of the third siphon has at its upper end a pressure equalization pot 13 with an exit 14 on. The exit 14 opens via a connection in the form of a flange 5a in the downstream component of the fluid path.

The pressure compensation line 18 is in the example shown here at the pressure equalization pot 6a of the second siphon 6 connected. But it can also be connected to an arbitrary pressure equalization pot one of the three siphons.

The pressure equalization pots not occupied by the pressure equalization line then each fulfill a mere overflow function for the forwarding of the fluid from a siphon of the cascade into the respectively following siphon or to the outlet of the return device. The appropriate choice of pressure equalization pot for connecting the pressure equalization line determines the height of the effective fluid column, with the corresponding maximum pressure difference, which can be compensated with such a return device. It is understood that in the in 2 shown way more siphons can be interconnected.

3 shows a return device in a further embodiment. This consists of the first siphon 1 and the second siphon 6 with the corresponding components explained above. The second siphon 6 has a sheath in this embodiment 15 on which encloses the outer tube of the siphon.

4 shows a sectional view of in 3 shown arrangement. The construction of the siphon 1 corresponds to the previously explained embodiments. The siphon 6 one has the outer tube 8th surrounding sheath 15 on the in a lower section an exit 16 contains. Between the outer tube 8th and the jacket is a flow gap 17 provided by the pressure compensation head 6a can be flowed through with the fluid. As in the previously explained embodiments, the pressure equalization pot is also located in this case 6a the pressure equalization line 18 ,

The fluid flows from the first siphon 1 coming into the inner tube 5 of the second siphon 6 and enters the outer tube from there 8th above. The path traversed within the first siphon forms a first leg, the path traversed within the second siphon, including the flow gap, forming a second leg of the embodiment illustrated herein. From there it gets into the pressure compensation head 6a pressed and flows from there into the flow gap 17 between the tube 8th and the sheath 15 , The fluid leaves the second siphon via the outlet 16 ,

In the thus executed fluid circulation, the fluid is inside the tube 8th in heat transferring contact with the fluid in the flow gap 17 , When using such an arrangement in an adsorption refrigeration system, in which the fluid is a refrigerant and the output 16 is passed into an evaporator sump, the fluid is in the flow gap 17 in constant contact with the evaporating and thus cold refrigerant in the evaporator sump and at the same time takes over the outer tube 8th Heat from the refrigerant in it. Thereby, the circulating within the outer tube refrigerant is pre-cooled. This avoids that larger amounts of liquid coolant with high temperature suddenly enter the evaporator sump and evaporate there abruptly, resulting in so-called evaporation shocks. As a result, the plant efficiency COP or the cooling capacity of the adsorption refrigeration system is thus improved in a moderate manner.

The 5 . 6a and 6b show the return device 3 in different views. In 5 It can be seen that the lower terminations of the first siphon and the second siphon, in particular the bottoms of the outer tube 3 and the sheath 15 , at a uniform level 19 are located. The longitudinal axes of the two siphons are oriented substantially parallel to one another.

6a shows a side view of the return arrangement 5 , It can be seen that the output 16 in the lower third of the casing 15 is set and in an upward leg 20 passes. This ensures that the fluid in the shell in the flow gap can not passively flow out of the outlet and have to overcome a certain gravity pressure. As a result, full running of the downstream component, ie in particular of the evaporator sump in an adsorption refrigeration system with a liquid fluid, ie with condensed refrigerant, prevented when the fluid circuit is out of operation.

6b discloses that the longitudinal axes of a horizontal feed leg 21 of the pipe 2 , the exit's thigh 16 and a terminal leg of the pressure equalization line 18 oriented parallel to each other. However, this orientation is dependent on the type of construction and depends on the specific arrangement of the components coupled to the return device.

The Inventive feedback device was based on embodiments explained in more detail. Further embodiments emerge from the dependent claims or by appropriate embodiments in the context of expert Actions.

1

first siphon

2

first inner tube

3

first outer tube

4

first Pressure compensation pot

5

first output

5a

flange

6

second siphon

6a

second Pressure compensation pot

7

second inner tube

8th

second outer tube

9

second output

10

third siphon

11

third inner tube

12

third outer tube

13

third Pressure compensation pot

14

third output

15

jacket

16

output on sheathing

17

Flow gap

18

Pressure equalizing line

19

level lower trap ends

20

upleg

21

feed leg

Claims (4)

Recirculation device for an adsorption refrigeration system, comprising an arrangement of a first siphon through which a fluid can flow ( 1 ) from a downwardly directed first inner tube ( 2 ), a downwardly closed, the inner tube enclosing the first outer tube ( 3 ) and one on an upper end of the outer tube arranged first pressure equalization pot ( 4 ) with a first output ( 5 ), with a downstream at the first output of the first siphon second siphon ( 6 ) with a downwardly directed second inner tube ( 7 ), a downwardly closed, the second inner tube enclosing the second outer tube ( 8th ) and a second outlet (FIG. 9 ). Apparatus according to claim 1, characterized in that at least one cascade to the second output of the second siphon ( 6 ) subsequent further siphon ( 10 ) is provided. Device according to one of claims 1 or 2, characterized in that at least one of the siphons a the respective outer tube completely surrounding, adjoining the respective pressure equalization pot, can be flowed through by the fluid sheath ( 15 ) with an output ( 16 ) having. Device according to one of claims 1 to 3, characterized in that at least one of the siphons connected to the respective pressure equalization pot pressure equalization line ( 18 ) having.