CZ2021284A3 - Equipment for obtaining water from the air - Google Patents

Abstract

The device for obtaining water from air comprises an element (8) for collecting condensed water and a housing (9) which has an inlet opening (10) for air inlet and an outlet opening (11) for air outlet. An air transport device (1) is located anywhere in the housing (9). In the direction from the inlet opening (10) to the outlet opening (11), the inlet heater (2), the sorption exchanger (3) and the cooler (4) are arranged in the housing (9) in the following order. The device further comprises at least one Peltier cell (6) and an outlet heater (5) located between the cooler (4) and the outlet opening (11), the cooler (4) being thermally conductively connected to the cold side (6.1) of the Peltier cell (6) and the outlet heater (5) is thermally conductively connected to the hot side (6.2) of the Peltier cell (6).

Description

Equipment for obtaining water from the air

Field of technology

The invention relates to a device for obtaining water from ambient air, which is characterized by a size minimized to the dimensions of a conventional drinking bottle for the possibility of being carried by a single person.

State of the art

At present, a number of devices are available on the market for obtaining water from the air, which operate on the principle of cooling the ambient air by an exchanger with a temperature lower than the dew point temperature, when water vapor from the air is excreted on its surface in the form of water droplets. The disadvantage of such a solution is that in the case of low specific humidity of the ambient air below 5 g / kg of dry air, water production is very low and at the same time energy-intensive. Therefore, for example, in desert conditions, conventional units for producing water from atmospheric moisture simply by cooling below the dew point do not work.

Therefore, the effort is to invent a device that would be sufficiently effective even in drier conditions. To a small extent, devices are beginning to appear which use sorbent material to humidify the air before cooling itself below the dew point temperature. The disadvantages of the hitherto known devices of this type are, on the one hand, the relatively high energy consumption and, on the other hand, the use of cooling technologies which do not make it possible to reduce such devices to a size suitable for personal use.

The device according to the application WO 2016/187709 A1 for obtaining water from the air uses a sorption system for dehumidification and humidification of the outside air. Two main embodiments are described here with a desiccant wheel and with a sorption material in the bed, which is heated by a heater. A disadvantage of the device with the sorption material in the bed is that it produces water only in one pass of air through the device and the adsorption of air humidity occurs in the second pass of air, which has a negative effect on water production. External sources are used to heat the sorption exchanger in the version with the desiccant wheel as well as with the sorption material in the bed, which leads to an increase in dimensions and no way is proposed to miniaturize the entire device. The proposed external heat sources are different, from waste heat from exhaust gases to heat from solar collectors. However, no heat recovery system is used in the plant itself. This results in high energy consumption and large dimensions. The heat from the cooling remains unused, and no cold recovery is described. Therefore, only its connection to the distribution network is designed and described in the application.

The device according to patent application US 2006/0272344 A1 uses a sorption system based on a sorption wheel with a solid desiccant with a closed regeneration circuit. Only waste heat from the internal combustion engine of the mobile device is used to regenerate the desiccant and no heat recovery related to the operation of the system is considered. As above, there is a sorption wheel that consumes extra electricity because it has to rotate between two positions. The device uses two air ducts, which is disadvantageous both in terms of dimensions and energy in terms of electricity consumption of the two suction devices. The dehumidified process air leaving the sorption wheel serves as a source of cold for the condensing exchanger, where water vapor is precipitated from the humidified air. The disadvantage of such a device is that it can only operate in cold or humid areas where the temperature of the dehumidified process air is sufficiently low below the dew point temperature of the humidified air.

The device according to U.S. Pat. No. 7,601,208 B2 uses a liquid desiccant to remove moisture from the air. The liquid desiccant removes moisture from the air stream by spraying. Next, the water is separated from the desiccant solution by evaporation. The heat source for evaporation is waste heat from the internal combustion engine of the mobile device, no heat recovery system is proposed in the patent. Subsequently water

-1 GB 2021 - 284 A3 steam condenses in the exchanger, where the source of cold is the intake outside air. A clear disadvantage of such a device is that the condensation of water vapor requires that the ambient air temperature be sufficiently low below the dew point temperature and that water condense in the cooler. Therefore, this device cannot operate in desert conditions where ambient air temperatures are generally high.

The device according to patent application US 2011/0296858 A1 uses a desiccation system with a sorption wheel with a solid desiccant. The outside intake air passes through the sorption wheel and water vapor is adsorbed on the desiccant surface. Subsequently, the already dehumidified air is heated in the microwave chamber to a high temperature and is led back to the desiccator wheel for its regeneration. Humidified air comes to the cooler, where water vapor condenses. It is not clear from the patent what advantage this device with a desiccant wheel has over a conventional condensing device, since the device works with the same flow of process and regeneration air, so there is no increase in air humidity before its condensation. The device works with the same efficiency of obtaining water from the air as conventional condensing devices and therefore with very low efficiency in desert areas. In addition, it is dimensionally and energy intensive.

The device according to patent CZ 307873 B6 uses a desiccation system with a sorption wheel with a solid desiccant. The device is designed as autonomous. The outside intake air passes through the sorption wheel and water vapor is adsorbed on the desiccant surface. The device uses a refrigerant circuit with a compressor to heat the regeneration air and to cool the air below the dew point, and also uses heat recovery, which is advantageous for the overall energy balance. Humidified air comes to the cooler, where water vapor condenses. The main disadvantage of the device is the space requirement of the device, which results from the presence of the desiccator wheel, two air ducts and the compressor refrigeration device, which limits the possibilities of implementing the device in a compact design.

The device according to patent application US 2018/0043295 A1 is fully autonomous and uses a desiccation system with two sorption wheels. In a closed circuit, the regeneration air is heated in an air solar collector, at the same time the air is repeatedly humidified by two desiccant wheels. After reaching the regeneration temperature, air humidity begins to condense on the fins of the air-air exchanger, where, on the other hand, ambient air flows, which is also used as process air. The disadvantage of such a device is the concept of two air streams, ie the operation of two suction devices and the space-consuming presence of two air ducts. Another disadvantage is the operation of two desiccator wheels. Also disadvantageous is the absence of a refrigerant circuit and thus the low production of condensed water, especially in a desert environment, where the ambient air temperature is higher than the dew point temperature.

The device according to patent CZ 308655 B6 uses a sorption exchanger with integrated air heating, with cold recovery to reduce the temperature at the inlet to the cooler. To cool the air below the dew point temperature of the device, a refrigerant circuit with a compressor is considered and the pumped heat is used to preheat the air at the inlet to the sorption exchanger. The use of a refrigerant circuit makes it impossible to make the device in a compact, small design for personal use.

The device according to patent CZ 308656 B6 uses sorption exchangers with integrated air heating with flow direction switching for continuous operation (simultaneous adsorption in one exchanger, desorption in the other exchanger). A refrigerant circuit with a compressor is considered for cooling the air below the dew point temperature of the device, which makes it impossible to make the device in a compact small design for personal use.

Thus, the disadvantage of some of the above-mentioned solutions known from the prior art is the scope of application limited either to areas with high humidity or to areas with low ambient air temperature. In the case of dry warm areas such as deserts, some of the facilities show low water production or high demands on the supply of external (non-renewable) energy. The main disadvantage of using all the above principles is the dimensional complexity due to the elements used as a sorption wheel, two

- 2 EN 2021 - 284 A3 air ducts or compressor cooling which makes it impossible to carry out the equipment in a size suitable for personal use, eg in the form of a portable drinking bottle.

The essence of the invention

These disadvantages are eliminated by the device for obtaining water from the air according to the present invention, which, in contrast to the devices known from the prior art, allows to achieve very small dimensions. The case in which the device is stored can be the size of a drinking bottle, while maintaining low energy consumption. The great advantage is that the device according to the present invention is easily portable by one person.

The device for obtaining water from the air comprises a condensed water collecting element and a housing having an air inlet and an air outlet, and an air transport device is located at any point in the housing. The inlet heater, the sorption exchanger and the cooler are also arranged in the housing in the direction from the inlet opening to the outlet opening in the following order. The device further comprises at least one Peltier cell and an outlet heater located between the cooler and the outlet. The heatsink is thermally conductively connected to the cold side of the Peltier cell and the outlet heater is thermally conductively connected to the hot side of the Peltier cell.

In one possible embodiment, the heat sink and the cold side of the Peltier cell are thermally conductively connected by means of at least one heat pipe.

In this embodiment, the hot side of the Peltier cell may then be in direct thermal contact with the outlet heater.

In another possible embodiment, on the other hand, the outlet heater and the hot side of the Peltier cell are thermally conductively connected by means of at least one heat pipe.

In this embodiment, the cold side of the Peltier cell may be in direct thermal contact with the heat sink.

The device preferably comprises a specific humidity sensor located between the sorption exchanger and the cooler.

It is advantageous if the device comprises a control unit and if the inlet heater has an inlet heater switch and the Peltier cell has a Peltier cell switch. To control the sorption and desorption in the sorption exchanger, the specific humidity sensor is informatively connected to the control unit and the control unit is informatively connected to the inlet heater switch as well as to the Peltier cell switch.

In another preferred embodiment, the device also comprises a control unit, but the input heater and the Peltier cell have, in contrast to the previous embodiment, a common switch for simultaneous switching of the input heater and the Peltier cell. To control the sorption and desorption in the sorption exchanger, the specific humidity sensor is connected to a common switch via a control unit.

It is advantageous if the housing is provided with thermal insulation.

The inlet opening and / or the outlet opening are preferably closable.

In a preferred embodiment, the inlet heater is an electric heater, the sorption exchanger comprises fins coated, which is typically zeolite, and the cooler and outlet heater are finned heat exchangers, which are typically aluminum.

-3GB 2021 - 284 A3

Clarification of drawings

The invention is described in detail in specific preferred embodiments with the aid of the accompanying drawings. In all the drawings, the overall arrangement of the device for obtaining water from the air in longitudinal section is schematically drawn.

Fig. 1 is an embodiment in which the hot side of the Peltier cell is in direct thermal contact with the outlet heater and the cold side of the Peltier cell is connected to the cooler by a heat pipe. The inlet heater and the Peltier cell have separate switches.

Fig. 2 shows an embodiment with the same Peltier cell connection as in Fig. 1, but unlike Fig. 1, the inlet heater and the Peltier cell have a common switch.

Fig. 3 is an embodiment in which the cold side of the Peltier cell is in direct thermal contact with the heat sink and the warm side of the Peltier cell is connected to the outlet heater by a heat pipe. The inlet heater and the Peltier cell have separate switches.

Fig. 4 shows an embodiment with the same Peltier cell connection as in Fig. 3, but unlike Fig. 3, the inlet heater and the Peltier cell have a common switch.

Examples of embodiments of the invention

The preferred embodiments described below show only some of the many possible solutions which fall within the scope of the invention and illustrate the inventive idea. These are only selected simple arrangements which do not limit the scope of protection of the invention in any way. These arrangements can be supplemented by other elements.

First, the structural arrangement of the device and then its function will be described.

As can be seen in Figures 1 to 4, the device comprises a housing 9 through which ambient air passes and by means of processes on individual elements inside the housing 9 water is obtained from it by repeated sorption and desorption in the sorption exchanger 3. dry and warm desert conditions.

The housing 9 serves as an air duct and can have various shapes, it is possible, for example, a cylindrical shape or various square shapes, the housing can also have, for example, the shape of a bottle with closable openings on the bottom and neck side. The housing 9 is preferably airtight and thermally insulated. In another embodiment, the device may also operate, but with less efficiency. Polyurethane, for example, can be used as thermal insulation. It is also advantageous if the material of the housing 9 is impact-resistant.

The housing 9 has an air inlet 10 and an air outlet 11. In order to prevent contamination of the device when not in use, it is advantageous if the inlet opening 10 and / or the outlet opening 11 are closable. It is optimal if both openings 10, 11 can be closed.

At any point in the housing 9, an air conveying device 1 is arranged, which is connected so as to convey air from the inlet opening 10 to the outlet opening 11. The air conveying device f can be embodied, for example, as an electrically driven fan.

Furthermore, in the housing 9, the inlet heater 2, the sorption exchanger 3 and the cooler 4 are arranged in the following order in the direction from the inlet opening 10 to the outlet opening 11 between the inlet opening 10 and the outlet opening 11. The purpose of this order of elements is to water from the sorption exchanger 3, the air could be preheated by the inlet heater 2 before entering the sorption exchanger 3, and the humidified air from the sorption exchanger 3 was subsequently directed to the cooler 4.

-4EN 2021 - 284 A3

Additional devices can be arranged between the inlet heater 2, the sorption exchanger 3 and the cooler 4, some of which will be described below. The sorption exchanger 3 has a desiccant applied to its heat exchange surface. Moisture condenses on the cooler 4 in the form of water droplets. The device for obtaining water from the air also comprises an element 8 for collecting condensed water. Typically, this condensed water collecting element 8 is located below the cooler 4, but if it is arranged for water from the cooler 4 to enter it, it can also be located elsewhere. The obtained liquid water is intended for further use. The condensed water collecting element 8 can be designed as a container or a pipe led out of the housing 9, or as a container with a pipe, etc. It can be placed in thermal insulation, inside and outside the housing, or it can pass through several parts of the air extraction device. at the same time. As the water collecting element 8, any channel, pipe, container or the like or a combination thereof can be used, adapted so that water from the cooler 4 can enter them. could flow.

The device for obtaining water from the air further comprises at least one Peltier cell 6, i.e. a thermoelectric cell operating on the principle of the Peltier effect. By passing an electric current of the selected direction, one side of the Peltier cell cools down (this side will be called the cold side 6.1 of the Peltier cell 6) and the other heats up (this side will be called the warm side 6.2 of the Peltier cell 6). However, more Peltier cells can be used to increase efficiency, they can be distributed, eg around the perimeter of the cooler 4 or the output heater 5, more Peltier cells can be combined into one larger one, etc.

The device for obtaining water from the air also comprises an outlet heater 5 located between the cooler 4 and the outlet 11. The cooler 4 is thermally conductively connected to the cold side 6.1 of the Peltier cell 6 and the outlet heater 5 is thermally conductively connected to the hot side 6.2 Peltier 's Article 6.

The inlet heater 2, the sorption exchanger 3, the cooler 4, the outlet heater 5 and the air transport device 1 are interconnected by air.

The latter four elements can have different technical designs. One possible advantageous embodiment of the inlet heater 2 is an electric heater through which air passes. The sorption exchanger 3 preferably comprises fins provided with a coating, which is typically of zeolite. The slats are preferably arranged to form channels. Zeolite has a high ability to bind water molecules to its surface and a low regeneration temperature for their release. The cooler 4 and the outlet heater 5 are preferably designed as finned heat exchangers in which air flows along the fins. Zebras are typically made of aluminum. However, it is also possible to implement the invention with preferred embodiments of these four elements other than those mentioned here, or to combine a preferred embodiment of one or some elements with embodiments of another or other elements not mentioned here.

The advantage is that the inlet heater 2, the sorption exchanger 3, the cooler 4, the outlet heater 5 and the air transport device 1 which can be placed anywhere in the housing 9 can be arranged in one line in the housing 9 and there is no need to use more air streams. be made as a single air duct and thus has a compact design.

The air transport device 1, the inlet heater 2 and the Peltier cell 6 are preferably supplied with direct current at a normal voltage level of 12 V. The electrical connections are only shown schematically in FIGS. 1-4. The principle of electrical connection, e.g. Peltier cell 6, is generally known to those skilled in the art.

The thermally conductive connection of the cold side 6.1 of the Peltier cell 6 to the cooler 4 and the thermally conductive connection of its hot side 6.2 to the outlet heater 5 can be realized in different ways.

It can be seen from Figures 1 to 4 that heat pipes 7 can be advantageously used for heat transfer. Figures 1 to 4 show an exemplary arrangement with 3 heat pipes 7, the horizontal parts of which are

-5GB 2021 - 284 A3 in overlap. However, the number of heat pipes can be chosen arbitrarily, the heat connection can be mediated by one or more heat pipes 7.

In this case, the thermally conductive connection by means of the heat pipe 7 or heat pipes 7 can be both between the heat sink 4 and the cold side 6,1 of the Peltier cell 6 (see FIGS. 1 and 2) and between the outlet heater 5 and the hot side 6, 2 (see Figs. 3 and 4). Although it is possible to have heat tubes 7 on both sides of the Peltier cell at the same time, i.e. both between the cooler 4 and the cold side 6.1 of the Peltier cell 6 and between the outlet heater 5 and the hot side 6.2 of the Peltier cell 6 (this embodiment is not shown). ), more preferred are embodiments in which one side of the Peltier cell is in direct thermal contact with the device to be cooled or heated, see Figs. 1 to 4.

Figures 1 and 2 show a preferred embodiment in which the heat sink 4 and the cold side 64 of the Peltier cell 6 are thermally conductively connected by heat pipes 7, and in which the hot side 6.2 of the Peltier cell 6 is in direct thermal contact with the outlet heater 5. The cooler 4 is thermally conductively connected to the outlet part of the heat pipes 7. Warm air flows into the cooler from the sorption exchanger 3 and heats the fins of the cooler 4 and thus also the outlet part of the heat pipes 7. The working substance in the heat pipes 7 evaporates and leaves the the condensing part of the heat pipes 7, which is cooled by the cold side 64 of the Peltier cell 6. The condensing part of the heat pipes 7 is preferably thermally conductively built into an aluminum plate which is in thermally conductive connection with the cold side 64 of the Peltier cell 6. of the heat pipes 7 condenses and the condensate either flows back into the outlet part or gets there by capillary effect. This ensures the transfer of heat from the air coming out of the sorption exchanger 3 to the cold side 6.1 of the Peltier cell 6. Thus, this air is cooled and the cold side 6.1 of the Peltier cell 6 is heated. its two sides 6.1 and 6.2 transfer heat from the cold side 6.1 of the Peltier cell 6 to its warm side 62. There this heat is removed by the flowing air, which is further heated and then exits the housing 9. For efficient heat dissipation in direct thermal contact with the hot side 62 of the Peltier cell 6, an outlet heater 5 is used, typically in a fin design, which transfers heat from the hot side 62 of the Peltier cell 6 to the air emerging from the housing 9.

In FIGS. 3 and 4, the circuit is reversed in FIGS. The heating part of the heat pipes 7 is preferably thermally conductively integrated in an aluminum plate which is in thermally conductive connection with the hot side 62 of the Peltier cell 6. The heater 5 is thermally conductively connected to the condensing part of the heat pipes 7. This connection it operates analogously to the circuit in FIGS.

The device for obtaining water from the air works in two modes: sorption and desorption. Switching between these modes can be solved in various ways, eg mechanically, by a timer, etc., but the most advantageous is a circuit in which the switching is controlled by the data from the specific humidity sensor 12. This specific humidity sensor 12 is located downstream of the sorption exchanger 3, most preferably between the sorption exchanger 3 and the cooler 4. The specific humidity sensor 12 can be implemented, for example, as a combined temperature and relative humidity sensor. For automated design, the device can be equipped with a control unit 15.

Switching of the inlet heater 2 and the Peltier cell can be ensured, e.g. in the manner shown in Figs. 1 and 3, i. that the inlet heater 2 has a switch 13 of the inlet heater 2 and the Peltier cell 6 has a switch 14 of the Peltier cell 6. To control sorption and desorption in the sorption exchanger 3, the specific humidity sensor 12 is informatively connected to the control unit 15 and the control unit 15 is informatively connected to the switch. 13 of the inlet heater 2 with the switch 14 of the Peltier cell 6. The information connection can be made both electrically by wire and wirelessly. According to the data from the specific humidity sensor 12, the control unit 15 instructs the switches 13 to close or open.

-6GB 2021 - 284 A3 to switch between sorption and desorption modes, which will be explained below. Having a separate switch 13 of the inlet heater 2 and a separate switch 14 of the Peltier cell 6 can be advantageous, for example from the point of view of thermal inertia: in some circumstances it may be useful to start the Peltier cell 6 earlier thus, a situation in which, in the desorption mode (see below), a portion of the moisture from the sorption exchanger 3 would be obtained before cooling sufficiently occurred.

However, an embodiment is also possible in which the inlet heater 2 and the Peltier cell 6 have a common switch 16 for simultaneous switching of the inlet heater 2 and the Peltier cell 6, see Figs. 2 and 4. To control sorption and desorption in the sorption exchanger 3 The information connection can be made both electrically wired and wirelessly via the control unit 15. According to the data from the specific humidity sensor 12, the control unit 15 instructs to close or open the common switch 16 and thus to switch between the sorption and desorption modes, which will be explained below.

In the sorption mode, i.e. the capture of water vapor, air from the environment enters the inlet opening 10. The air transport device 1 is switched on, the inlet heater 2 is switched off and does not supply heat to the flowing air, the Peltier cell 6 is switched off, it does not cool the air in the cooler 4. The air flowing through the housing 9 water molecules from the flowing air bind in the desiccant on the surface of the sorption exchanger 3. The specific humidity sensor 12 monitors the state of the air behind the sorption exchanger 3. Air leaves the device through the outlet 11. When the water vapor content in the air stream behind the sorption exchanger 3 begins to increase, i. the sorption exchanger 3 is saturated with moisture, the device switches to the desorption mode, in which water is obtained. The air conveying device 1 is still running and ambient air enters the device for obtaining water from the air through the inlet opening 10. The inlet heater 2 is switched on and the Peltier cell 6 is switched on. They can be switched on either simultaneously or with a time delay. Their switching on and off can be controlled by the control unit 15 on the basis of data from the specific humidity sensor 12, or also on the basis of other additional data. The inlet heater 2 heats the air entering the sorption exchanger 3. The heated air releases water molecules from the desiccant surface in the sorption exchanger 3 and is humidified. Heated and humidified air enters the cooler 4, which is thermally conductively connected to the cold side 6.1 of the Peltier cell 6. At the surface temperature of the cooler 4 below the dew point, water vapor condenses from the air as liquid water on its surface and flows into the collecting element 8. condensed water, where it usually accumulates for further use. The cooled and dehumidified air enters the outlet heater 5 thermally conductively connected to the hot side 6.2 of the Peltier cell 6, is heated and exits through the outlet 11 out of the device.

The cold side 6,1 of the Peltier cell cools the air in the cooler 4 or, depending on the design of the cooler 4, also the fins of the cooler 4. The warm side 6,2 of the Peltier cell 6 is kept low at the flowing cold air from the cooler 4 in order to achieve low energy consumption. at the same time in order to achieve a low surface temperature of the cooler 4 on the cold side of the Peltier cell 6. The warm side 6,2 of the Peltier cell then heats the air in the outlet heater 5 or, depending on the outlet heater 5, also the fins of this outlet heater 5.

When the humidity sensor 12 detects a decrease in the water vapor content at the outlet of the sorption exchanger 3, the device switches back to the sorption mode. The inlet heater 2 and the Peltier cell 6 are switched off, the air transport device 1 remains switched on. When out of operation, it is suitable to close the inlet opening 10 and the outlet opening 11.

Electricity to the air water plant can advantageously be supplied from portable direct current sources, e.g. a photovoltaic panel, a fuel cell (hydrogen-oxygen, methanol, etc.), batteries, etc.

The device according to the present invention allows a very advantageous cold recovery. Due to the fact that the cooled air leaving the cooler 4 is used to cool the warm side of the 6.2 Peltier

-7 CZ 2021 - 284 A3 cell, it is possible to keep the energy consumption of cooling at a low level and it is also possible to increase the cooling capacity of the cooler, ie. get to a lower temperature than if the cooled air from the cooler to cool the warm side of the 6.2 Peltier cell had not been used. Thanks to the described arrangement, the device can be efficient and at the same time small in size and therefore portable, moreover with low demands on electricity.

The device is able to efficiently produce water even from dry warm air with parameters typical of desert conditions. To illustrate, for one possible embodiment of a device in the size of a drinking bottle with a diameter of 60 mm, the water production can be around 4 dcl / h at an air flow of 8 m ³ / h for desert air with an air temperature of 30 ° C and specific humidity 5 g / kg. By further optimizing the parameters of the device, it is then possible to achieve a shift to even higher volumes of water produced.

Industrial applicability

The device is advantageous to use especially in desert areas where there is low specific humidity and high outdoor air temperatures. The device according to the present invention is very small in size in a drinking bottle and is therefore easily portable by one person. It can be used, for example, in reconnaissance expeditions, in travel or in humanitarian aid. The device can be operated autonomously without the use of non-renewable energy sources, or with a local portable energy source without connection to the electricity network.

Claims (11)

PATENT CLAIMS An apparatus for obtaining water from air, comprising an element (8) for collecting condensed water and a housing (9) having an air inlet opening (10) and an air outlet outlet (11), at any point in the housing (9) an air transport device (1) is arranged, and in the housing (9) the inlet heater (2), the sorption exchanger (3) are arranged in the following order in the direction from the inlet opening (10) to the outlet opening (11), and cooler (4), characterized in that it further comprises at least one Peltier cell (6) and an outlet heater (5) located between the cooler (4) and the outlet opening (11), the cooler (4) being thermally conductively connected to the cold side (6.1) The Peltier cell (6) and the outlet heater (5) are thermally conductively connected to the hot side (6.2) of the Peltier cell (6). Device according to Claim 1, characterized in that the heat sink (4) and the cold side (6.1) of the Peltier cell (6) are thermally conductively connected by means of at least one heat pipe (7). Device according to claim 2, characterized in that the hot side (6.2) of the Peltier cell (6) is in direct thermal contact with the outlet heater (5). Device according to Claim 1 or 2, characterized in that the outlet heater (5) and the hot side (6.2) of the Peltier cell (6) are thermally conductively connected by means of at least one heat pipe (7). Device according to claim 4, characterized in that the cold side (6.1) of the Peltier cell (6) is in direct thermal contact with the heat sink (4). Device according to any one of claims 1 to 5, characterized in that it comprises a specific humidity sensor (12) located between the sorption exchanger (3) and the cooler (4). Device according to claim 6, characterized in that it comprises a control unit (15) and that the inlet heater (2) has a switch (13) of the inlet heater (2) and the Peltier cell (6) has a switch (14) of the Peltier cell (6). ), wherein for controlling sorption and desorption in the sorption exchanger (3), the specific humidity sensor (12) is informatively connected to the control unit (15) and the control unit (15) is informatively connected to the switch (13) of the inlet heater (2). switch (14) of the Peltier cell (6). Device according to claim 6, characterized in that it comprises a control unit (15) and that the inlet heater (2) and the Peltier cell (6) have a common switch (16) for simultaneous switching of the inlet heater (2) and the Peltier cell (6). ), wherein in order to control the sorption and desorption in the sorption exchanger (3), the specific humidity sensor (12) is informatively connected to the common switch (16) via the control unit (15). Device according to any one of claims 1 to 8, characterized in that the housing (9) is provided with thermal insulation. Device according to any one of claims 1 to 9, characterized in that the inlet opening (10) and / or the outlet opening (11) are closable. Device according to any one of claims 1 to 10, characterized in that the inlet heater (2) is an electric heater, that the sorption exchanger (3) comprises fins provided with a coating, which is typically zeolite, and that the cooler (4) and the outlet heater (5) are finned heat exchangers, which are typically made of aluminum.