Drying device and method for drying compressed gas

Abstract

DRYING DEVICE AND METHOD FOR DRYING COMPRESSED GAS. Method for drying compressed gas by means of a drying device (1) with an inlet (7) and an outlet (8) comprising at least two vessels (2) filled with a regenerable desiccant (3) and a controllable valve system (4), consisting of a first and a second valve block (5, 6) connecting the inlet (7), respectively the outlet (8), to the aforementioned vessels (2), wherein the valve system (4) is regulated in such a way that one vessel (2) dries compressed gas while the other vessel (2) is successively regenerated and cooled, wherein the method comprises a first and a second cooling cycle, wherein the first cooling cycle consists of passing ambient air through the vessel (2) to be cooled and the second cooling cycle consists of branching, expanding and sending dry compressed gas through the outlet (8) to be branched and then blowing it out through the vessel (2) to be cooled,using the first or second cooling cycle, or both, depending on predetermined conditions.

Description

1 / 15 “DRYING DEVICE AND METHOD FOR DRYING COMPRESSED GAS”

[001] The present invention relates to a drying method and device for drying compressed gas.

[002] More specifically, the invention relates to fitted drying devices with an inlet for compressed gas to be dried and an outlet for dry compressed gas, wherein the drying device includes at least two vessels filled with a regenerable desiccant and a system of controllable valves connecting the aforementioned inlet and outlet to the aforementioned vessels, wherein the system of controllable valves is such that at least one vessel will dry compressed gas while the other vessel is successively regenerated and cooled, wherein each of the vessels in turn will be drying compressed gas by means of regulation of the valve system.

[003] Regenerable desiccant means a desiccant that can absorb moisture from a gas by means of adsorption and, when saturated with moisture, can be dried by passing a so-called regeneration gas through it. This process is also called desiccant regeneration. The regeneration gas is typically a hot gas.

[004] Although this is the adsorption principle, the invention can also be applied to the absorption principle.

[005] When a vessel is dry, it will absorb moisture from the compressed gas being dried, saturating the desiccant.

[006] This vessel is then regenerated, typically by allowing hot air to pass through it. This hot air will draw moisture out of the desiccant and regenerate it.

[007] Before the vessel is used again to dry compressed gas, it must first be cooled. Petition 870260061750, dated 06 / 24 / 2026, page 5 / 51 2 / 15

[008] Methods already exist in which part of the dry compressed gas is branched and expanded at the outlet of the drying device. As a result, the gas will cool and then pass through the vessel to cool it.

[009] Subsequently, the used gas is blown out.

[010] This method has the disadvantage that it loses some of the compressed and dry air in order to cool the vessel, which is obviously undesirable.

[011] There are also methods in which ambient air is passed through the vessel in question.

[012] This can be aspirated, for example, by means of a fan or something similar.

[013] It is possible that the drawn air is passed through the vessel several times, passing each time through an air cooler to be cooled.

[014] One disadvantage of this is that it is never possible to cool below ambient temperature. At high ambient temperatures, there is a risk that the aspirated air will be cooled insufficiently, so that the temperature of the vessel will not drop sufficiently after cooling.

[015] Furthermore, if the cooler fails, the intake air will not be cooled, which may also cause the vessel temperature to drop insufficiently.

[016] As a result, the vessel will not be able to extract as much moisture from the gas to be dried during its next adsorption cycle.

[017] Remaining moisture in compressed gas can cause problems for end consumers.

[018] Another disadvantage is that when using ambient air, moisture will also enter the vase.

[019] As a result, the dew point at the outlet of Petition 870260061750, dated 06 / 24 / 2026, page 6 / 51 3 / 15 of the drying device can become too loud, which is obviously undesirable.

[020] This invention aims to solve at least one of the aforementioned disadvantages and other disadvantages.

[021] To this end, the invention relates to a method for drying compressed gas by means of a drying device with an inlet for compressed gas to be dried and an outlet for dry compressed gas, comprising at least two vessels filled with a regenerable desiccant and a controllable valve system consisting of a first valve block and a second valve block connecting the aforementioned inlet to the outlet, respectively, to the aforementioned vessels, wherein the controllable valve system is regulated in such a way that at least one vessel dries compressed gas while the other vessel is successively regenerated and cooled, wherein, by regulating the valve system, each of the vessels in turn dries compressed gas,characterized in that the method consists of providing a first and a second cooling cycle to cool the vessel being cooled, with the first cooling cycle consisting of sending ambient air through the vessel and the second cooling cycle consisting of drying, to branch compressed gas at the aforementioned outlet, expanding it and passing it through the vessel to be cooled, after which this gas is then blown out, applying the first or second cooling cycle, or both, depending on predetermined conditions.

[022] One advantage of this method is that a vessel will always be able to cool with the first cooling cycle, which is the most energy-efficient, but still, if necessary and by choosing the appropriate predetermined conditions, a vessel will be able to apply the second cooling cycle which is much more robust and Petition 870260061750, dated 06 / 24 / 2026, page 7 / 51 4 / 15 as reliable as a kind of 'fail-safe'.

[023] In this mode, the compressed gas is always dried appropriately, even if, for example, the ambient temperature becomes too high, and in addition the second cooling cycle is used only under conditions where it is necessary.

[024] In a preferred embodiment, after the vessel has been cooled with the first cooling cycle, the method consists of measuring or determining the temperature in that vessel or at the outlet of that vessel and, if that temperature is greater than a predetermined maximum temperature, performing further cooling of that vessel with the second cooling cycle.

[025] This has the advantage that the first, most energy-efficient cooling cycle will always be used to cool the vessel.

[026] The second cooling cycle will only be used to further reduce the vessel temperature if necessary.

[027] Furthermore, when the second cooling cycle is switched on, this second cooling cycle will only have to perform limited additional cooling, which means that it will have to be used for a shorter period of time.

[028] In another preferred embodiment, the method includes the step of determining or measuring the dew point at the outlet or determining or measuring an average dew point at the outlet during a predetermined period of time before cooling the vessel being cooled, and: - If this dew point is equal to or greater than a predetermined maximum dew point, cool this vessel with the second cooling cycle; and - If this dew point is lower than the predetermined maximum dew point, cool this vessel with the first cooling cycle.

[029] In this case, if the dew point is very high, only Petition 870260061750, dated 06 / 24 / 2026, page 8 / 51 5 / 15 The second cooling cycle will be applied. Dry air is used for the second cooling cycle, so that moisture can also be extracted from the vessel in question during the cooling process.

[030] In this mode, the vase will be dried at the same time and regenerated additionally.

[031] It is important to note that the dew point is thus determined or measured when the vessel in question is in the adsorption phase, that is, the dew point is determined or measured when the vessel in question is drying gas.

[032] It is also possible to measure or determine the dew point during all or part of the adsorption phase and then calculate an average of it.

[033] The invention also relates to a drying device that will allow the aforementioned method to be applied, i.e., be able to apply both the first and second cooling cycles.

[034] For this purpose, the invention aims at a drying device for drying compressed gas, wherein the drying device is equipped with an inlet for compressed gas to be dried and an outlet for dried compressed gas, wherein the drying device includes at least two vessels filled with a regenerable desiccant and a controllable valve system consisting of a first valve block and a second valve block connecting the aforementioned inlet, respectively the aforementioned outlet, to the aforementioned vessels, wherein the valve system is regulated in such a way that at least one vessel dries compressed gas while the other vessel is successively regenerated and cooled, each vessel drying the compressed gases in turn being controlled by the valve system, characterized in that the drying device is equipped Petition 870260061750, dated 06 / 24 / 2026, page 9 / 51 6 / 15 additionally with a fan for drawing in ambient air, a gas release port and a four-way valve which will allow the fan or the gas release port to be connected to the vessels by means of the first valve block in such a way that, when the four-way valve connects the fan to the first valve block, the ambient air drawn in by the fan can enter the vessel being cooled by means of the four-way valve and the first valve block, wherein the drying device is additionally equipped with a branching tube capable of branching dry compressed gas, expanding it and conducting it by means of the 'second' valve block to the vessel being cooled in such a way that, when the four-way valve connects the gas release port to the 'first' valve block, the branched gas can, after passing through the vessel being cooled, be discharged through the gas release port.

[035] One advantage of such a drying device is that it will allow the use of a method according to the invention, that is, to apply both the first cooling cycle and the second cooling cycle.

[036] By skillfully controlling the components of the drying device, in particular the four-way valve and the valve system, all the necessary circuits can be created in a relatively compact way.

[037] Obviously, all the previously mentioned advantages of the method can also be applied to the device.

[038] To better demonstrate the features of the invention, the following content describes, by way of example and without any restrictive character, several preferred embodiments of a drying method and device according to the invention, with reference to the accompanying drawings, in which: Figure 1 shows schematically a device of Petition 870260061750, dated 06 / 24 / 2026, p. 10 / 51 7 / 15 drying according to the invention; Figure 2 shows schematically the drying device from Figure 1, but in a different position.

[039] The drying device 1 shown schematically in figure 1 according to the invention for drying compressed gas essentially consists of two vessels 2 filled with a moisture absorber 3.

[040] This regenerable moisture absorber 3 is also called a desiccant.

[041] Of course, it is possible that there are more than two vessels 2.

[042] The drying device 1 further comprises a valve system 4 consisting of a first valve block 5 and a second valve block 6.

[043] The first valve block 5 will connect vessels 2 to an inlet 7 for dry compressed gas, while the second valve block 6 will connect vessels 2 to an outlet 8 for dry compressed gas.

[044] The valve blocks 5, 6 mentioned above are a system of different pipes and valves that can be regulated in such a way that at any given time at least one vessel 2 is being regenerated, while the other vessel 2 or vessels 2 are drying the compressed gas, whereby by regulating the valve system 4 each of the vessels 2 will in turn dry compressed gas.

[045] Furthermore, according to the invention, the drying device 1 is equipped with a four-way valve 9, a fan 10 for ambient air intake and a gas release port 11 for gas release, which are configured in such a way that in a first position of the four-way valve 9 the fan 10 is connected to the vessels 2 by means of the first valve block 5, as shown in figure 1, and in a second position of the valve Petition 870260061750, dated 06 / 24 / 2026, page 11 / 51 8 / 15 four-way 9 the gas release port 11 is connected to vessels 2 by means of the first valve block 5, as shown in figure 2.

[046] Certainly, it is not excluded that, instead of a fan 10, other devices may be provided for ambient air intake.

[047] It is also possible that, instead of a four-way valve 9, a valve block, for example, with four valves or air inlets or other device may be used to achieve the same configuration as the four-way valve 9.

[048] As shown in figure 1, the drying device 1 is such that, in the first position of the four-way valve 9, ambient air drawn in by the fan 10 through the four-way valve 9 and the first valve block 5 can enter the vessel 2 which is being cooled.

[049] Certainly, valve block 5 is set in the appropriate mode to enable the direct flow path for the gas.

[050] In addition, the drying device 1 is equipped with a branching tube 12 that can branch dry compressed gas, expand it and conduct it through the second valve block 6 to the vessel 2 that is being cooled.

[051] In this case, the branch tube 12 mentioned above contains an expansion valve 13 to expand the branched dry compressed gas.

[052] The branch pipe 12 mentioned above is preferably at least partially integrated into, or at least part of, the second valve block 6.

[053] In this case, branch pipe 12 is fully integrated into the second valve block 6.

[054] As shown in figure 2, the drying device 1 is such that, when the four-way valve 9 is in the second position Petition 870260061750, dated 06 / 24 / 2026, page 12 / 51 9 / 15 position, the branched outlet gas can be blown out through the gas release port 11 after passing through the cooled vessel 2.

[055] Certainly, the valve block 6 is set in the appropriate mode to enable the direct flow path for the gas.

[056] In other words, an open cooling circuit 14 is formed, consisting of the branch tube 12, the second valve block 6, the vessel 2 being cooled, the first valve block 5, the four-way valve 9 and the gas release port 11. This open cooling circuit 14 mentioned above will be used for the second cooling cycle, as explained below.

[057] In the example shown in figures 1 and 2, but not necessary for the invention, the drying device 1 is equipped with a cooling tube 15 connecting the second valve block 6 to the inlet side 16 of the fan 10.

[058] From the figures it can be seen that a closed cooling circuit 17 will be formed when the four-way valve 9 is in the first position mentioned above, which is successively formed by the fan 10, the four-way valve 9, the first valve block 5, a vessel 2, the second valve block 6 and the cooling tube 15.

[059] As can be seen in the figures, the cooling tube contains a cooler 18. This cooler 18 can be, for example, an air cooler for air 18.

[060] The closed cooling circuit 17 mentioned earlier will be used for the first cooling cycle, as explained below.

[061] However, it is also possible for the invention to use an open circuit for the first cooling cycle. In this case, the cooling tube 15 mentioned above with the cooler 18 will be Petition 870260061750, dated 06 / 24 / 2026, page 13 / 51 10 / 15 missing, but will be replaced by a gas release port, release valve or similar connected to the second valve block 6. The open circuit for the first cooling cycle then consists of the fan 10, the four-way valve 9, the first valve block 5, a vessel 2, the second valve block 6 and the release port or gas release valve.

[062] In addition, the drying device 1 is equipped with a regeneration tube 19 that connects the four-way valve 9 to the second valve block 6.

[063] In the second position of the four-way valve 9, when the four-way valve 9 connects the gas release port 11 to the first valve block 5, the four-way valve 9 will connect the fan 10 to the regeneration tube 19 and thus to the second valve block 6.

[064] This regeneration tube 19 is equipped with a heater, in this case an electric heater 20.

[065] As can be seen from figure 2, in the second position of the four-way valve 9, a regeneration circuit 21 is formed comprising the fan 10, the four-way valve 9, the regeneration tube 19 with the heater 20, the second valve block 6, the vessel 2 being regenerated, the first valve block 5, the four-way valve 9 and the gas release port 11.

[066] In the second position of the four-way valve 9 a regeneration circuit 21 is formed as well as the open cooling circuit 14 which is used for the second cooling cycle. The regeneration circuit 21, or the open cooling circuit 14, will be implemented by means of appropriate adjustment of the valve blocks 5, 6.

[067] As can be seen in the figures, in this case the regeneration tube 19 and the cooling tube 15 partially coincide. Petition 870260061750, dated 06 / 24 / 2026, page 14 / 51 11 / 15

[068] In this case, only one tube 22 will come out of the second valve block 6, which also includes the heater 20 mentioned earlier. The tube 22 mentioned earlier splits into two separate tubes 22a, 22b, one of which results in the inlet side 16 of the fan 10, in which the cooler 18 is included, and one results in the four-way valve 9.

[069] It is obvious that, in addition to the appropriate regulation of valve blocks 5, 6 and the four-way valve 9, the heater 20 and the cooler 18 mentioned above are also appropriately controlled by implementing the open cooling circuit 14, the closed cooling circuit 17 and the regeneration circuit 21.

[070] Finally, the drying device 1 in this case, but not necessary for the invention, includes a temperature sensor 23 that can measure the temperature of the vessels 2 and a dew point sensor 24 that can measure the dew point at the outlet of the vessels 2. Both sensors 23, 24 in this case are located on the outlet side of the vessels 2, that is, on the side of the vessels 2 connected to the outlet 8 of the drying device 1.

[071] The operation of the drying device 1 and the method according to the invention for drying compressed gas using the drying device 1 are very simple and as follows.

[072] During the operation of drying device 1, compressed gas to be dried will enter vessel 2 which is drying through inlet 7.

[073] As it passes through this vessel 2, the desiccant 3 will extract moisture from the gas.

[074] The dry compressed gas will leave the drying device 1 through outlet 8.

[075] The other vessel 2, which has already dried gas during a previous cycle, contains moisture and is regenerated in the meantime. Petition 870260061750, dated 06 / 24 / 2026, page 15 / 51 12 / 15

[076] A regeneration cycle is used, which consists of heating ambient air and sending it through the relevant vessel 2 and then blowing it out.

[077] For this regeneration cycle, the regeneration circuit mentioned earlier is used.

[078] For this purpose, the four-way valve 9 is placed in the second position and the valve blocks 5, 6 are adjusted in such a way that the regeneration circuit 21 is realized. In this case, the heater 20 is also switched on.

[079] The fan 10 will draw in ambient air that passes through the regeneration tube 19 along the heater 20 where the gas is heated.

[080] Through the second valve block 6, the heated gas will be carried to the other vessel 2 mentioned earlier, where it will extract moisture from the desiccant as it passes through this vessel 2.

[081] Through the first valve block 5, the hot wet gas will leave the drying device 1 through the gas release port 11.

[082] After the regeneration cycle, heater 20 will be switched off.

[083] When desiccant 3 is regenerated, vessel 2 will be cooled.

[084] For this purpose, the method is applied according to the invention, which essentially consists of providing a first cooling cycle and a second cooling cycle.

[085] For the first cooling cycle, the closed cooling circuit 17 is used, in which ambient air is sent through vessel 2 which is being cooled.

[086] For the second cooling cycle, the open cooling circuit 14 is used, in which dry compressed gas at outlet 8 is branched, expanded and passed through vessel 2 which is being cooled, after which this gas is blown out.

[087] The method consists of applying the first or second cycle Petition 870260061750, dated 06 / 24 / 2026, page 16 / 51 13 / 15 cooling, or both, based on predetermined conditions.

[088] In a first alternative embodiment of the method, the method consists of cooling the vessel 2 in question with the first cooling cycle, using the closed cooling circuit 17 and the cooler 18.

[089] The ambient air drawn in by the fan 10 will be circulated through the closed cooling circuit 17, and after passing through vessel 2 it will be cooled by the cooler 18. This cooled gas will then be passed again through vessel 2 by means of the fan 10.

[090] After vessel 2 has been cooled with the first cooling cycle, the temperature of vessel 2 is measured using the temperature sensor 23 provided for this purpose.

[091] If this temperature is greater than a predetermined maximum temperature Tmax, this vessel 2 will be further cooled with the second cooling cycle.

[092] The four-way valve 9 will then be switched to the position shown in figure 2, after which the second cooling cycle can be started, using the open cooling circuit 14 to cool vessel 2 additionally, using the expanded and thus cooled dry compressed gas.

[093] In order to expand the branched dry compressed gas, expansion valve 13 is used.

[094] In a second alternative embodiment of the method, the method consists of determining or measuring the dew point at outlet 8 using the dew point sensor 24 provided for this purpose before the vessel involved is cooled 2.

[095] If the dew point is lower than a predetermined maximum dew point DPmax, vessel 2 will be cooled with the first cooling cycle.

[096] However, if the dew point is equal to or greater than Petition 870260061750, dated 06 / 24 / 2026, page 17 / 51 14 / 15 maximum predetermined dew point DPmax, vessel 2 will be cooled with the second cooling cycle.

[097] As mentioned above, during this second cooling cycle, additional drying of desiccant 3 will occur in vessel 2, causing the dew point to drop.

[098] After completing the cooling of vessel 2, this vessel 2 can be used to dry compressed gas, while the other vessel 2, previously used for drying, can now be regenerated and cooled according to the method mentioned above.

[099] Although in the previously mentioned example of the method, for the first cooling cycle, a closed cooling circuit 17 is used, after ambient air is drawn in by means of a fan 10 or similar and the ambient air then circulates in the closed cooling circuit 17, it is not excluded that a non-closed circuit is used in which the drawn ambient air is blown out after passing through the vessel 2 that is being cooled.

[0100] This has the advantage that cooler 18 is not required.

[0101] One disadvantage is that fresh ambient air is constantly drawn in to cool vessel 2.

[0102] As a result, if the ambient air is too humid, it is possible that too much moisture will enter vessel 2, which may cause the dew point at outlet 8 to rise too high.

[0103] In this case, the second alternative embodiment of the invention mentioned above will be very advantageous, since it will allow the dew point to be lowered if necessary.

[0104] Another aspect of the invention relates to a method for drying compressed gas by means of a drying device with an inlet for the compressed gas to be dried and an outlet for the dried compressed gas, comprising at least two vessels filled with Petition 870260061750, dated 06 / 24 / 2026, p. 18 / 51 15 / 15 a regenerable desiccant and a controllable valve system consisting of a first valve block and a second valve block connecting the aforementioned inlet, respectively outlet, to the aforementioned vessels, wherein the controllable valve system is regulated in such a way that at least one vessel dries compressed gas while the other vessel is successively regenerated and cooled, wherein by regulating the valve system each of the vessels in turn dries compressed gas, characterized in that the method consists of providing a regeneration cycle to regenerate a vessel that is being regenerated, wherein this regeneration cycle consists of heating ambient air, passing it through the vessel involved and then blowing it out.

[0105] This means applying the regeneration cycle mentioned earlier to a known drying device 1, i.e., without necessarily having to apply the first and second cooling cycles.

[0106] The present invention is in no way limited to the embodiments described as examples and shown in the figures, but a method and device according to the invention can be implemented in all shapes and sizes without going beyond the scope of the invention. Petition 870260061750, dated 06 / 24 / 2026, p. 19 / 51

Claims

1 / 4 CLAIMS 1. Method for drying compressed gas by means of a drying device (1) with an inlet (7) for compressed gas to be dried and an outlet (8) for dry compressed gas, wherein the drying device (1) comprises at least two vessels (2) filled with a regenerable desiccant (3) and a controllable valve system (4), consisting of a first valve block (5) and a second valve block (6) connecting the inlet (7) indicated above, respectively outlet (8), to the vessels (2) mentioned above, the controllable valve system (4) being regulated in such a way that at least one vessel (2) will dry compressed gas while the other vessel (2) will be regenerated and cooled successively, wherein, by regulating the valve system (4), each of the vessels (2), in turn, dries compressed gas, wherein the method consists of providing a first and a second cooling cycle to cool the vessel (2) being cooled,wherein the first cooling cycle consists of passing ambient air through the vessel (2) and the second cooling cycle consists of branching dry compressed gas at the aforementioned outlet (8), expanding it and passing it through the vessel (2) to be cooled, after which this gas is then blown out, wherein depending on predetermined conditions the first or second cooling cycle, or both, will be applied, characterized in that it also consists, for the first cooling cycle, in using a closed cooling circuit (17) provided with a cooler (18) in which, after ambient air is drawn in, the ambient air is then circulated in the closed cooling circuit (17) and cooled by the cooler (18).

2. Method according to claim 1, characterized in that it includes the step of measuring or determining the temperature in that vessel (2) or at the outlet (8) of that vessel (2) after the vessel (2) has been cooled with the first cooling cycle and, if that temperature Petition 870260061750, dated 06 / 24 / 2026, page 20 / 51 2 / 4 is greater than a predetermined maximum temperature (Tmax), performing additional cooling of that vessel (2) with the second cooling cycle.

3. Method according to claim 1, characterized in that it includes the step of determining or measuring the dew point at the outlet (8) or determining or measuring an average dew point at the outlet (8) during a predetermined period of time before the vessel (2) is cooled, and: - if this dew point is equal to or greater than a predetermined maximum dew point (DPmax), cooling this vessel (2) with the second cooling cycle; and - if this dew point is less than the predetermined maximum dew point (DPmax), cooling this vessel (2) with the first cooling cycle.

4. Method according to any of the preceding claims, characterized in that, for the second cooling cycle, it also consists of using an expansion valve (13) to expand the branched, dried, compressed gas at the outlet (8).

5. Method according to any of the preceding claims, characterized in that it consists of providing a regeneration cycle to regenerate a vessel (2) that is being regenerated, wherein this regeneration cycle consists of heating ambient air, passing it through the vessel (2) in question and then blowing it out.

6. Drying device for carrying out the method for drying compressed gas as defined in any one of claims 1 to 5, wherein the drying device (1) is equipped with an inlet (7) for compressed gas to be dried and an outlet (8) for dry compressed gas, wherein the drying device (1) comprises at least two vessels (2) filled with a regenerable desiccant (3) Petition 870260061750, dated 06 / 24 / 2026, p. 21 / 51 3 / 4 and a controllable valve system (4) consisting of a first valve block (5) and a second valve block (6) connecting the aforementioned inlet (7), respectively outlet (8), to the aforementioned vessels (2), the controllable valve system (4) being such that at least one vessel (2) will dry compressed gas while the other vessel (2) is successively regenerated and cooled, wherein by means of regulation of the valve system (4) each of the vessels (2) in turn dries compressed gas,wherein the drying device (1) is further equipped with a fan (10) for drawing in ambient air, a gas release port (11) and a four-way valve (9), valve block or similar which will allow the fan (10) or the gas release port (11) to be connected to the vessels (2) by means of the first valve block (5), such that when the four-way valve (9) connects the fan (10) to the first valve block (5), the ambient air drawn in by the fan (10) can enter the vessel (2) to be cooled by means of the four-way valve (9) and the first valve block (5), wherein the drying device (1) is further equipped with a branch tube (12) which can branch dry compressed gas, expand it and conduct it by means of the second valve block (6) to the vessel (2) to be cooled, such that when the four-way valve (9) connects the gas release port (11) to the first valve block (5),The branched gas can be blown out through the gas release port (11) after passing through the vessel (2) to be cooled, characterized in that it is additionally equipped with a cooling tube (15) connecting the second valve block (6) to the inlet side (16) of the fan (10) in such a way that a closed cooling circuit (17) is formed when the four-way valve (9), the valve block or such connects the fan (10) to the first valve block (5) which is a cooling circuit Petition 870260061750, dated 24 / 06 / 2026, page. 22 / 51 4 / 4 closed (17) formed successively by the fan (10), the four-way valve (9), the first valve block (5), a vessel (2), the second valve block (6) and the cooling tube (15), through which the cooling tube (15) is provided with a cooler (18)., 7. Drying device according to claim 6, characterized in that it is additionally equipped with a regeneration tube (19) which includes a heater (20), which regeneration tube (19) connects the four-way valve (9) to the second valve block (6), wherein, when the four-way valve (9) connects the gas release port (11) to the first valve block (5), the four-way valve (9) connects the fan (10) to the regeneration tube (19) and thus to the second valve block (6) in such a way that a regeneration circuit (21) is formed comprising the fan (10), the four-way valve (9), the regeneration tube (19) with the heater (20), the second valve block (6), the vessel (2) to be regenerated, the first valve block (5), the four-way valve (9) and the gas release port (11).

8. Drying device according to claim 7, characterized in that the regeneration tube (19) and the cooling tube (15) partially coincide.

9. Drying device, according to any one of claims 6 to 8, characterized in that the branch tube (12) contains an expansion valve (13).

10. Drying device, according to any one of claims 6 to 9, characterized in that the branch tube (12) is integrated into, or part of, the second valve block (6). Petition 870260061750, dated 06 / 24 / 2026, page 23 / 51

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