EP3084322A1

EP3084322A1 - Adsorption refrigeration device, arrangement and motor vehicle

Info

Publication number: EP3084322A1
Application number: EP14815586.4A
Authority: EP
Inventors: Andreas Eichendorf; Thomas Demmer; Ulrich Kappenstein; Ralf Diekmann
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2013-12-17
Filing date: 2014-11-05
Publication date: 2016-10-26
Also published as: US20160320102A1; DE102013226158A1; US10670308B2; WO2015090716A1; CN105849480A

Abstract

The invention relates to an adsorption refrigeration device (1) having at least one first chamber (3) comprising an adsorber/desorber material (7), and having at least one second chamber (5) comprising an evaporator/condenser device (9), wherein the first chamber (3) and the second chamber (5) are in fluid connection with one another via a pipeline (11), and wherein a valve device (13) is arranged in the pipeline (11), by means of which valve device the fluid connection between the first chamber (3) and the second chamber (5) can be blocked in a first functional position and opened in a second functional position. According to the invention, the valve device (13) has a valve element (15) of variable diameter, wherein the valve element (15) is formed in such a way that, in the first functional position, it has a first diameter, by means of which it fills an internal cross section of the pipeline (11) with tight contact with an inner wall (25) of the pipeline (11), wherein, in the second functional position, it has a second diameter which is smaller than the first diameter, such that a gap (33) is opened between the inner wall (25) of the pipeline (11) and the valve element (15).

Description

Description title

Adsorption chiller, arrangement and motor vehicle

The invention relates to an adsorption refrigeration machine according to the preamble of claim 1, an arrangement comprising a motor and a

Adsorptionskältemaschine, according to claim 8, and a motor vehicle according to claim 9.

State of the art

Adsorption chillers of the type discussed here are known. Such adsorption refrigeration machine has at least a first chamber, which has an adsorber / desorber material. At least one second chamber is provided, which has an evaporator / condenser device. The first and second chambers are in fluid communication with one another via a pipeline, wherein a valve device is arranged in the pipeline. Through this, the fluid connection between the first and the second chamber in a first functional position can be blocked and released in a second functional position. The piping typically requires large cross-sections, particularly in the range of about 50 mm. These are not readily closable, in particular by valves customary in the motor vehicle sector. Rather, the use of a technically complicated and expensive shut-off valve is necessary, in particular because of a vacuum which is typically prevalent in the two chambers, the use of which is problematic, especially in a motor vehicle, for cost reasons. Disclosure of the invention

The invention is therefore based on the object to provide an adsorption refrigerator, an arrangement and a motor vehicle, which does not have the disadvantages mentioned.

The problem is solved by an adsorption chiller with the

Characteristics of claim 1 is created. The adsorption chiller is characterized in that the valve means comprises a valve element of variable diameter, wherein the valve element is formed so that it has a first diameter in the first functional position, with which it has an inner cross section of the pipe under close contact with an inner wall thereof it fills in the second

Functional position has a second diameter which is smaller than the first diameter, so that a gap between the inner wall of the

Piping and the valve element is released. In the manner described here, the valve element and thus the entire valve device can be constructed technically and structurally very simple, in particular, it has only a few parts and is inexpensive. At the same time it is possible with the

Valve device, especially with the valve element, even large

Seal pipe sections safely and reproducibly. Through this

Finally, the use of an adsorption chiller for the uncomplicated and inexpensive technology of the valve device

Air conditioning in motor vehicles economically representable.

The mode of operation of an adsorption chiller is known in principle, so that it will be discussed here only cursory: In a

Adsorption chiller is a sorption chiller that works with a solid sorbent. The adsorber / desorber material having, first chamber serves as adsorber / desorber means. In a

Adsorption phase of the adsorption chiller becomes one in the

Evaporator / condenser device present, liquid refrigerant evaporates, transferred via the pipe from the second chamber into the first chamber and adsorbed there by the adsorber / desorber material. For this purpose, the adsorber / desorber material has a very large surface area. The Evaporator / condenser device operates in the adsorption phase as an evaporator, wherein they heat of vaporization from the environment or in particular from a first cooling circuit, for example one

Motor vehicle removes, wherein the evaporator / condenser device of the environment or the coolant provides cooling capacity.

At the same time, the adsorber / desorber material works as an adsorber, in which region absorption heat is released, preferably via a second

Cooling circuit is discharged. In a desorption of Adsorptionskältemaschine is the

Adsorber / desorber material, which then acts as a desorber, heat supplied, for example via the second cooling circuit described above, which then acts as a heating circuit. In this way, the refrigerant is expelled from the adsorber / desorber material and evaporated. It is via the pipe of the second chamber and thus the evaporator / condenser

Device supplied, which now acts as a condenser, wherein the refrigerant is liquefied in the evaporator / condenser device. Preferably, the heat of condensation released here is dissipated, for example via the first cooling circuit described above.

By means of the valve device arranged in the pipeline, it is possible to store cooling capacity with low loss. For this purpose, the valve device is displaced after completion of the desorption phase in its first functional position, so that the pipeline is closed and the fluid connection between the first and the second chamber is blocked. The adsorption phase can then not be started, but the refrigerant remains in the second chamber, at the same time the adsorber / desorber material is not loaded with refrigerant. In this state, the adsorption chiller neither absorbs heat from the environment, nor does it dissipate heat to the environment. It also does not provide cooling capacity. If cooling capacity is to be made available, the valve device can be displaced into its second functional position so that the fluid connection between the first and the second chamber is released. It then begins the adsorption phase, wherein cooling power is provided in the evaporator / condenser device. It is thus possible to carry out the desorption phase at a first time and thus to store quasi cooling capacity in the adsorption chiller, which can then be retrieved at any later, second time by opening the valve means and thus initiating the adsorption phase.

As the refrigerant for the Adsorptionskältemaschine preferably water or methanol is used. The adsorber / desorber material used is preferably a material selected from a group consisting of

Activated carbon, alumina, aluminum phosphate, silica-aluminum phosphate, metal-silica-aluminum phosphate, mesostructure silicate, a metal-organic

Scaffold, a microporous material, in particular a microporous polymer, a silica gel, and a zeolite. These materials have due to their large inner surface the property of the refrigerant, especially water or methanol, absorb very well.

The evaporator / condenser device preferably has one

Heat exchanger structure on. In one embodiment, it is possible that in the second chamber a rib structure and / or as

Heat exchanger structure formed pipe for the first cooling circuit is provided. By means of the heat exchanger structure, it is on the one hand possible to supply the evaporator / condenser device evaporation heat when it works in the adsorption phase as an evaporator, on the other hand, heat can be removed to dissipate the heat of condensation when the evaporator / condenser device in the

Desorption phase works as a capacitor.

Preferably, the first chamber has a heat exchanger structure, particularly preferably in the manner of a arranged in the form of a heat transfer structure pipeline for the second cooling circuit, wherein the

Heat exchanger structure, in particular the pipeline, outside with the

Adsorber / desorber material is coated. In this way it is possible to supply heat to the adsorber / desorber material in the desorption phase in order to drive off the refrigerant from the adsorber / desorber material, it being possible in the adsorption phase to remove the heat of adsorption released in the area of the adsorber / desorber material dissipate. The pipeline between the first and the second chamber has

preferably a diameter of about 50 mm, preferably 50 mm. In this case, this diameter is preferably the inner diameter of the pipeline.

The valve element has in a preferred embodiment, a variable volume, so not only its size in one direction, namely the diameter is variable, but the volume of the

Total valve element.

The term "diameter" is not to be understood as limiting with respect to a circular cross-section of the valve element, but rather a length dimension in a cross-sectional plane of the pipeline and the valve element, which is variable irrespective of the concrete shape of the valve element on the one hand and the pipeline on the other the

Valve element fills the cross section of the pipeline in the first functional position, where it releases it in the second functional position.

Particularly preferably, the valve element is adapted with respect to its geometry to a geometry of the pipeline. In this way, a particularly tight contact of the valve element in the first functional position on the inner wall of the pipeline can be ensured. Particularly preferably, the cross section of the valve element is geometrically adapted to a cross section of the pipeline.

An adsorption chiller is also preferred, which is characterized in that the valve element has an elastic sheath. This encloses a working space which is sealed off from the pipeline and from the first and the second chamber. The working space is operatively connected to a control valve device. Preferably, it is in fluid communication with the control valve means. Due to the operative connection, the working space can be acted upon by the control valve device in the first functional position with a first pressure, wherein it is in the second functional position can be acted upon by a second pressure. The first pressure is greater than the second pressure.

Due to the elastic shell of the enclosed by this working space in terms of its volume - depending on the pressure within the

Working space on the one hand and outside of the elastic shell on the other hand - changeable. By being sealed off from the pipeline and the first and second chambers, it is either increased in volume against the prevailing pressure or reduced in volume by this pressure or by the elasticity of the casing. Preferably, the first pressure is greater than the pressure prevailing in the pipeline or the first and the second chamber, which is also referred to as system pressure, so that the working space is increased in volume in the first functional position of the valve device, in particular a larger volume than in the second functional position. The second

Pressure is preferably less than or equal to the system pressure prevailing in the pipeline, the first and the second chamber, so that the working space in this functional position is reduced in volume, in particular smaller in volume than in the first

Functional position. In this case, the elastic sheath in the first functional position by the pressure prevailing in the working space sealing against the

Inner wall of the pipeline urged, while in the second

Functional position has a distance from the inner wall of the pipe, so that a gap between the inner wall of the pipe and the elastic sheath is released.

The elastic sheath preferably comprises a material selected from a group consisting of rubber, an elastic polymer, and rubber. Preferably, the elastic sheath of one of said materials.

The first pressure is preferably in the environment of

Adsorptionskältemaschine prevailing pressure, in particular atmospheric pressure or ambient pressure. This is especially the case when the

Adsorptionskältemaschine works at a negative pressure, which is the case regularly when water is used as a refrigerant. In this In the case of the first and second chambers, as well as in the pipeline, system pressures in the range of about 10 mbar to about 100 mbar prevail.

The loading of the working space with atmospheric pressure in the first functional position of the valve device has the advantage that there is no external

Pressure source is needed, which would have to remain in an operating mode to hold the valve device in its first functional position. Rather, the valve device readily remains in the first functional position as long as the pressure in the working space is not lowered below the ambient pressure. The fluid connection between the first chamber and the second chamber can remain locked for virtually any length, without the need for energy supply to the Adsorptionskältemaschine. Thus, in particular when using the adsorption refrigeration machine in a motor vehicle

Cooling capacity can also be stored long term in the event of a shutdown, in order to be ready in time for commissioning or commissioning

Motor vehicle unabated to make available. The storage of the refrigerating power charged in this way neither an accumulator of

Motor vehicle or a vehicle battery, nor any other

Energy source.

The second pressure is preferably less than or equal to the system pressure of the adsorption chiller. If the second pressure is equal to the system pressure, the elastic shell contracts due to its elastic properties and thus moves away from the inner wall. If the second pressure is less than the system pressure, the elastic sheath is additionally compressed by the pressure difference between the system pressure and the second pressure.

The valve device preferably has, on the one hand, the valve element and, on the other hand, the control valve device, wherein the valve element can be actuated by the control valve device so that the valve device as a whole is displaceable from its first functional position to its second functional position and vice versa.

The elastic shell having valve element is structurally particularly simple and inexpensive, while it is very functional u works reproducibly. This is in particular because only a few, simple and inexpensive elements are used for the valve device. An embodiment of the adsorption chiller is also preferred, which is characterized in that the working space on the

Control valve device in the first functional position with an environment of the Adsorptionskältemaschine in fluid communication. In this case, the working space is communicated directly via the control valve device with an ambient pressure in the environment of the adsorption chiller,

preferably subjected to atmospheric pressure. Accordingly, if the first chamber, the second chamber and the pipeline are under negative pressure, the working space is expanded, with the elastic covering sealingly against the

Inner wall of the pipeline applies. In this way, an extremely simple displacement of the valve device can be realized in its first functional position, without the need for an external pressure source. In particular, no pressure pump is necessary to expand the elastic sheath. Rather, the present in the adsorption chiller vacuum is in combination with the ambient pressure as a drive for the expansion of the working space, the elastic shell and thus the

Displacement of the valve device used in the first functional position.

An embodiment of the adsorption chiller is also preferred, which is characterized in that the working space on the

Control valve device in the second functional position with a

Vacuum source is in fluid communication. The vacuum source is preferably designed so that it generates the second pressure in the working space, which is preferably less than or equal to a system pressure of the

Adsorption chiller is. It is possible in a very simple and cost-effective way, the valve device in its second

To arrange functional position. This is especially the case if one already exists in the environment of the adsorption chiller

Vacuum source is used. For example, this can be done at a

Use of Adsorptionskältemaschine in a motor vehicle to be provided for a brake booster anyway vacuum source. Also in Incidentally, motor vehicles as well as other use environments of adsorption refrigeration machines regularly have a vacuum pump to which the control valve device can be connected. It therefore regularly requires no separate vacuum source to act on the

Working space with the second pressure. Of course, but one is

Embodiment of the Adsorptionskältemaschine possible, in which this even their associated vacuum source, in particular a

Vacuum pump, comprising.

Overall, in the manner described here is a simple and

realized cost-effective valve device, which is ultimately controllable via already existing pressure conditions. The valve device has only the structurally very simply formed valve element with the elastic sheath, as well as a fluid connection to the control valve device, and the

Control valve device itself. It is possible that the valve device additionally also has the negative pressure source, but preferably the control valve device is provided with an external, anyway provided

Vacuum source in fluid communication, so that the valve device has only a very small number of parts, which are taken individually and also as an assembly extremely simple and inexpensive, with only the already existing pressure conditions are used to the valve device from its first into its second Shift functional position and vice versa.

An exemplary embodiment of the adsorption chiller is also preferred, which is characterized in that the tube element has a constriction against which the valve element lies tightly in the first functional position. The constriction is preferably formed as a cross-sectional constriction, or as in particular annular circumferential, radially inwardly projecting back into the pipeline projection to which the valve element can nestle in the first functional position. This will be in the area of

Cross-sectional constriction causes a particularly good contact of the valve element on the inner wall of the tubular element, so that an increased density results. An embodiment of the adsorption chiller is also preferred, which is characterized in that the valve element is designed as a rubber bellows and / or as a bellows. These are particularly simple and inexpensive embodiments of the valve element, which at the same time with simple means a very high tightness of the valve device in the first functional position

guarantee. It turns out that just a rubber bellows or a bellows can be easily adapted in its geometry of the geometry of the pipeline, so that there is a high sealing effect. Finally, an embodiment of the adsorption chiller is preferred, which is characterized in that it comprises at least two chambers with adsorber / desorber material and at least two chambers, each with an evaporator / condenser device. It is clear from the above description of the adsorption chiller that it works in phases, with an adsorption phase and a desorption phase preferably alternating cyclically. It is therefore not continuous

Provision of cooling capacity possible. Rejects the

Adsorptionskältemaschine a plurality of chambers with adsorber / desorber material and a plurality of chambers with evaporator / capacitor devices can, a quasi-continuous provision of

Cooling capacity can be realized, in which the different chambers alternate in terms of their functionality. Thus, if a chamber with adsorber / desorber material works as an adsorber, another chamber with adsorber / desorber material can work as a desorber at the same time. Likewise, a chamber with an evaporator / condenser device can work as an evaporator, while at the same time another chamber with an evaporator / condenser device operates as a condenser. After finishing a cycle

or a phase can then be switched, the functionality of the chambers, in any case always at least one chamber with an evaporator / condenser device is present in the cooling capacity for

Available.

Preferably, the adsorption refrigerator has exactly two chambers with adsorber / desorber material. Additionally or alternatively, the Adsorptionskältemaschine preferably exactly two chambers, each with an evaporator / condenser device.

An embodiment of the adsorption chiller is also preferred in which it has an integer multiple of two first chambers

Adsorber / Desorber material and / or an integer multiple of two second chambers each having an evaporator / condenser device. Particularly preferred is an embodiment of the

Adsorptionskältemaschine, which exactly two first chambers with

Adsorber / Desorber material and at the same time has exactly two second chambers, each with an evaporator / condenser device. The object is also solved by providing an arrangement with the characteristics of

Claim 8 is created. This comprises an engine, in particular an exhaust-emitting internal combustion engine or an electric motor or an electric machine, and an adsorption refrigerator according to one of the previously described embodiments. The engine and the

Adsorptionskältemaschine are connected to each other via a fluid connection, that the adsorption chiller waste heat of the engine, in one embodiment exhaust gas of the internal combustion engine, is supplied as a heat source. Alternatively or additionally, it is provided that the adsorption chiller can be supplied via the fluid connection or via an additional fluid connection coolant of a coolant circuit of the engine as a heat source. It is thus possible to use the waste heat from the exhaust gas of the internal combustion engine or in the cooling circuit, which is provided for cooling the engine, available heat to in the desorption of the

Adsorption chiller to desorb the refrigerant from the adsorber / desorber material. Compared to a compression refrigeration machine so no mechanical drive energy must be diverted from the engine to operate the chiller. Rather, available waste heat from the exhaust gas and / or from the cooling circuit is used for the operation of the adsorption chiller anyway. This has the advantage that the engine is more energy efficient, with lower fuel consumption, with greater range and / or with a longer service life until the next charging of a

Accumulator can work, as this is the case, if in addition

Drive power for the compressor would have to provide a compression refrigeration machine.

The object is finally solved by a motor vehicle having the features of claim 9 is created. The motor vehicle is characterized by an arrangement according to one of the previously described

Exemplary embodiments. In particular, the motor vehicle therefore has an adsorption chiller, which with the waste heat of a motor of the

Motor vehicle is operable. In connection with the air conditioning of the motor vehicle falls then no additional fuel consumption, or it results in an electric vehicle, in which the waste heat from the cooling circuit of an electric motor is used, no range minimization, because the air conditioning is not at the expense of in one Accumulator of the electric vehicle available power is done. In addition, the possibility of cooling capacity due to the functionality of the

Store valve device, the advantage that the Adsorptionskältemaschine can be operated without the use of the engine, if previously refrigeration capacity was stored in the Adsorptionskältemaschine. This allows in a very simple manner a stationary air conditioning of a motor vehicle interior, which significantly increases the comfort of the motor vehicle.

The motor vehicle is preferably designed as a passenger car. But it can also be a truck, the

Adsorptionskältemaschine not only for the air conditioning of a cab, but also for the air conditioning of a cargo space of the truck can be used.

The invention will be explained in more detail below with reference to the drawing. Showing:

Figure 1 is a schematic representation of an embodiment of a

Adsorptionskältemaschine with a valve device in a first functional position, and 2 shows the embodiment of Figure 1 with the valve device in a second functional position.

FIG. 1 shows a schematic representation of an embodiment of an adsorption refrigeration machine 1 which has a first chamber 3 and a second chamber 5. In the first chamber 3, an adsorber / desorber material 7 is arranged. The second chamber 5 has an evaporator / condenser device 9, which preferably has a heat exchanger structure.

In particular, preferably in the second chamber 5 a

Evaporator / condenser device 9 is arranged, or the second chamber 5 is formed as an evaporator / condenser device 9.

The first chamber 3 is in fluid communication with the second chamber 5 via a pipe 11. In the pipe 11, a valve device 13 is arranged. This has a valve element 15 with a variable diameter.

In the illustrated embodiment, the valve element 15 on an elastic sheath 17, which encloses a working space 19. The working space 19 is sealed against the pipe 11 and also with respect to the first chamber 3 and with respect to the second chamber 5. Preferably, the valve member 15 is formed as a rubber bellows.

The working space 19 is operatively connected to a control valve device 21, in particular with this in fluid communication, so that he through the

Control valve device 21 is selectively acted upon by a first pressure or a second pressure.

Due to the elastic properties of the elastic shell 17 is the

Valve element 15 is formed virtually inflatable, wherein it has a variable volume and thus at the same time also the variable diameter.

The valve device 13 is shown in Figure 1 in a first functional position in which the working space 19 mediates on the

Control valve device 21 with an environment 23 of the Adsorptionskältemaschine 1 is in fluid communication. Therefore prevails in the working space 19 of the

Ambient pressure, which also prevails in the environment 23, preferably

Atmospheric pressure. In the first chamber 3, in the second chamber 5 and in the pipe 11, however, there is a negative pressure, which also as

System pressure is called, and in any case is smaller than that

Ambient pressure in the environment 23. Therefore, the valve element 15 is inflated as it were in this first functional position, wherein there is a first

Diameter, with which it fills an inner cross-section of the pipe 11 under close contact with an inner wall 25 of the pipe 11.

The pipe 11 has in the illustrated embodiment a

Constriction 27, which is designed here as an annular circumferential, radially inwardly facing projection of the inner wall 25. In particular, at this constriction 27, the valve element 15 is in the first

Functional position inside tight. It also turns out that that

Valve element 15 in the embodiment shown here additionally - in Figure 1 above the constriction 27 - all over tight against the inner wall 25. Overall, a very reliable, dense and reproducible system of the valve element 15 in the first functional position on the

Inner wall 25 of the pipe 11 causes.

In Figure 1 is also shown that in the second chamber 5, a refrigerant 29, preferably water or methanol, is arranged. FIG. 2 shows the embodiment of the adsorption refrigerating machine according to FIG

Figure 1 in a second functional position. Same and functionally identical

Elements are provided with the same reference numerals, so that reference is made to the previous description. In this second

Functional position of the valve device 13 is the working space 19 through the control valve device 21 with an only schematically indicated

Vacuum source 31 fluidly connected. This may be, for example, the brake booster of a motor vehicle or a vacuum pump provided elsewhere in a motor vehicle, or else a separate vacuum source, in particular a vacuum pump, associated with the adsorption chiller 1. In this state prevails in the working space 19th a second pressure which is in any case less than the first pressure in the first functional position, and in particular less than or equal to the system pressure prevailing in the first chamber 3, in the second chamber 5 and in the pipeline 11.

Due to the prevailing pressure conditions or due to the elastic properties of the elastic sheath 17, the valve element 15 is no longer inflated in the second functional position, but rather relaxed or even contracted, so that it has a smaller volume than in the first functional position and a second diameter, the is smaller than the first diameter, wherein the second diameter is also designed so that a gap 33 between the inner wall 25 and the valve member 15, in particular its elastic sheath 17, is released. The valve element 15 is thus no longer close to the inner wall 25 at.

In this way, in the second functional position, a fluid path between the first chamber 3 and the second chamber 5 along the pipeline 11 is released, which is blocked in the first functional position by the valve element 15.

The mode of operation of the adsorption chiller 1, with reference to FIGS. 1 and 2, is the following:

In a desorption phase is loaded with the refrigerant 29

Adsorber / desorber material 7 in the first chamber 3 heat supplied, so that the refrigerant 29 is desorbed from the adsorbent / desorber material and thus expelled.

In this case, an arrangement of the adsorption refrigeration machine 1 and an engine, not shown, is preferably provided, wherein the arrangement is particularly preferably part of a motor vehicle, in particular a passenger car. The Adsorptionskältemaschine 1 is connected to the engine via a fluid connection such that the adsorption chiller 1 waste heat of the engine, in particular exhaust of an internal combustion engine and / or coolant of a coolant circuit of the engine, can be supplied as a heat source. The waste heat of the engine, which is either included in the exhaust gas or in the coolant used for cooling the engine, is therefore used to desorb the refrigerant 29 from the adsorber / desorber material 7.

The desorbed refrigerant passes via the pipe 11 into the second chamber 5, where it condenses. It is obvious that during the

Desorption phase, the valve device 13 is arranged in its illustrated in Figure 2, the second functional position, so that the fluid path between the first chamber 3 and the second chamber 5 via the pipe 11th

is released.

When the desorption phase is complete and the refrigerant 29 is complete or as complete as either desired or possible from

Adsorber / desorber material 7 expelled, it is possible, the valve device

13 to arrange in their first functional position, which is shown in Figure 1. In this case, the fluid communication between the first chamber 3 and the second chamber 5 is closed via the pipeline 11, so that no refrigerant 29 can flow between the first chamber 3 and the second chamber 5. It is thus possible to store cooling capacity in the adsorption chiller 1. As in the first functional position according to Figure 1, the working space 19 only with the ambient pressure from the environment 23, in particular with

Atmospheric pressure is applied, this storage state can be maintained almost arbitrarily long, without requiring a supply of power, for example, to drive a pump needed. In particular, the cooling capacity can be stored in a motor vehicle in this way without an engine, so an internal combustion engine or an electric machine of the motor vehicle, must be operated. If the cooling capacity to be retrieved, the valve device 13 is in turn brought into its illustrated in Figure 2, second functional position, and the fluid path between the first chamber 3 and the second chamber 5 via the pipe 11 is released. In this case, due to the very large surface of the

Adsorber / Desorber material 7 a driving force for adsorption of the refrigerant 29 on this surface. The adsorber / desorber material thus sucks quasi the refrigerant 29, which evaporates in the second chamber 5, via the

Pipeline 11 flows into the first chamber 3 and is adsorbed there on the surface of the adsorber / desorber material. In this case, the refrigerant 29 absorbs heat of vaporization in the second chamber 5, so that here cooling capacity is provided, which can be used for air conditioning, for example, an interior of a motor vehicle. The released in the first chamber 3 adsorption heat is preferably dissipated.

Overall, it is found that it is possible due to the design of the valve device 13 proposed here to provide a simply constructed, cost-effective and efficient adsorption refrigeration machine 1, which is able to safely store refrigeration capacity for a long time. This has a particularly advantageous effect on an arrangement of the adsorption chiller 1 with an engine and on a motor vehicle, which with the

Adsorptionskältemaschine 1 is configured.

Claims

claims

1. Adsorptionskältemaschine (1) with at least a first, a

Adsorber / desorber material (7) having chamber (3), and with at least a second, an evaporator / condenser device (9) having chamber (5), wherein the first chamber (3) and the second chamber (5) via a

Pipe (11) are in fluid communication with each other, and wherein in the conduit (11) a valve means (13) is arranged, through which the fluid connection between the first chamber (3) and the second chamber (5) in a first functional position lockable and in a second functional position is releasable, characterized in that the valve device (13) a

Valve element (15) having a variable diameter, wherein the

Valve element (15) is formed so that it has a first diameter in the first functional position, with which it has an inner cross-section of the pipe (11) in close contact with an inner wall (25) of

Fills pipeline (11), wherein it is in the second functional position, a second

Diameter which is smaller than the first diameter, so that a gap (33) between the inner wall (25) of the pipe (11) and the valve element (15) is released.

2. Adsorptionskältemaschine (1) according to claim 1, characterized

characterized in that the valve element (15) has an elastic sheath (17) enclosing a working space (19), the working space (19) being opposite the pipe (11), the first chamber (3) and the second chamber (5). is sealed, wherein the working space (19) with a control valve means (21) is operatively connected, so that the working space (19) through the

Control valve device (21) in the first functional position with a first pressure and in the second functional position with a second pressure

can be acted upon, wherein the first pressure is greater than the second pressure.

3. Adsorptionskältemaschine (1) according to one of the preceding

Claims, characterized in that the working space (19) via the control valve device (21) in the first functional position with an environment (23) of the Adsorptionskältemaschine (1) in fluid communication.

4. Adsorptionskältemaschine (1) according to one of the preceding

Claims, characterized in that the working space (19) via the control valve device (21) in the second functional position with a

Vacuum source (31) is in fluid communication.

5. Adsorptionskältemaschine (1) according to one of the preceding

Claims, characterized in that the pipe (11) has a

Constriction (27), at which the valve element (15) in the first

Functional position is tight.

6. Adsorptionskältemaschine (1) according to one of the preceding

Claims, characterized in that the valve element (15) as

Rubber bellows and / or designed as a bellows.

7. Adsorptionskältemaschine (1) according to one of the preceding

Claims, characterized in that the Adsorptionskältemaschine (1) has at least two chambers with adsorber / Desorber- material (7) and at least two chambers, each with an evaporator / condenser device (9).

8. An arrangement comprising an engine and an adsorption chiller (1) according to any one of claims 1 to 7, wherein the engine and the

Adsorptionskältemaschine (1) are connected to each other via a fluid connection such that the adsorption chiller (1) waste heat of the engine can be fed.

Motor vehicle, characterized by an arrangement according to claim