Compressed gas dehumidifier

Abstract

The present invention provides a compressed gas dehumidifier that can maintain or improve dehumidification performance and allows for inline installation by piping the inlet and outlet sections at the same height. [Solution] The first heat exchanger section 10 is provided such that a pre-cooling passage 11 and a reheating passage 12 intersect, and the second heat exchanger section 20 is provided so as to dehumidify by cooling a cooling fluid flowing through a cooling pipe 22. An upper chamber 31 is provided above the first heat exchanger section 10 and the second heat exchanger section 20 which are arranged vertically next to each other. The first heat exchanger section 10 is provided with a reheating passage outlet 12b at its upper end, an outlet pipe section 33 connecting from inside the upper chamber 31 to the outside in the lateral direction, a pre-cooling passage inlet 11a opening at the upper end of the first heat exchanger section 10, and an inlet pipe section 32 connecting from the outside of the upper chamber 31 in the lateral direction through the inside of the upper chamber 31 to the pre-cooling passage inlet 11a.

Description

Technical Field

[0001] The present invention relates to a compressed gas dehumidifying device in which a heat exchanger is provided in two stages of a first heat exchanger section and a second heat exchanger section so as to dehumidify a primary compressed gas introduced from the outside by heat exchange and discharge the dehumidified secondary compressed gas to the outside. The first heat exchanger section is provided so as to precool the primary compressed gas and reheating the secondary compressed gas, and a precooling flow path related to the primary compressed gas and a reheating flow path related to the secondary compressed gas are arranged so as to intersect each other. The second heat exchanger section is provided so as to cause condensation by cooling the primary compressed gas precooled by the first heat exchanger section with a cooling fluid flowing through a cooling pipe disposed in the second heat exchanger section and dehumidify it.

Background Art

[0002] Conventionally, in a system related to a compressed air dehumidifying device that dehumidifies compressed air in a high-temperature and high-humidity state introduced from a compressor (compressed air device) that generates compressed air as a compressed gas, moisture contained in the air is aggregated and condensed to be removed. A heat exchanger and a device for cooling compressed air through the heat exchanger (for example, a refrigerating machine, a device for using a cooling medium such as groundwater which is cold water) are components.

[0003] As such a compressed air dehumidifying device (compressed gas dehumidifying device), for example, in order to preferably enhance the dehumidifying effect, a horizontally placed type in which a heat exchanger is provided in two stages of a first heat exchanger section and a second heat exchanger section and is horizontally provided so as to cause condensation by cooling compressed air with a cooling medium using a refrigeration cycle and dehumidify it has been previously disclosed by the present applicant (see Patent Document 1).

[0004] Furthermore, a vertically mounted compressed air dehumidifier (compressed gas dehumidifier) ​​has also been previously disclosed by the present applicant, which, like the horizontally mounted type, has a heat exchanger arranged in two stages: a first heat exchanger section and a second heat exchanger section (see Patent Documents 2 and 3). The purpose of these vertically mounted compressed gas dehumidifiers is to prevent the scattering of drain.

[0005] However, in conventional compressed gas dehumidifiers with two heat exchangers, the structure is complex, resulting in the compressed gas inlet and outlet being at different vertical positions (heights), making in-line integration difficult. In this context, in-line integration refers to the rational construction of a system by connecting and arranging equipment equipped with gas component adjustment functions and filter functions in a linear fashion, thereby simplifying piping, reducing installation space, lowering airflow resistance, and improving maintenance. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2001-183014 (page 1) [Patent Document 2] Japanese Utility Model Publication No. 60-190987 (Claim 1, Figure 1) [Patent Document 3] Japanese Patent Publication No. 2017-127801 (page 1) [Overview of the project] [Problems that the invention aims to solve]

[0007] The problem to be solved with regard to compressed gas dehumidifiers is that, when an inline configuration is implemented, it is desirable to arrange (pipe) the inlet pipe where the gas inlet is formed and the outlet pipe where the gas outlet is formed on the same horizontal line. However, in conventional compressed gas dehumidifiers, which have a heat exchanger in two stages, the vertical positions (height positions) are different due to their unique structural constraints. In order to implement an inline configuration in this conventional configuration, it is necessary to route external piping, and no rational configuration has been proposed to solve this problem.

[0008] Therefore, the object of the present invention is to provide a compressed gas dehumidifier that can maintain or improve dehumidification performance and can be inline-built by effectively piping the inlet pipe section where the gas inlet is formed and the outlet pipe section where the gas outlet is formed at the same height. [Means for solving the problem]

[0009] To achieve the above objective, the present invention comprises the following configuration. According to one embodiment of the compressed gas dehumidifier according to the present invention, a heat exchanger is provided in two stages, a first heat exchanger section and a second heat exchanger section, to dehumidify primary compressed gas introduced from the outside by heat exchange and to discharge the dehumidified secondary compressed gas to the outside, the first heat exchanger section is provided so as to precool the primary compressed gas and reheat the secondary compressed gas by having a precooling flow path for the primary compressed gas and a reheating flow path for the secondary compressed gas intersect, the second heat exchanger section is provided so as to dehumidify the primary compressed gas precooled in the first heat exchanger section by cooling fluid flowing through cooling pipes arranged in the second heat exchanger section by causing condensation, the first heat exchanger section and the second heat exchanger section are provided adjacent to each other and are arranged so as to be vertically elongated when in use, and a vertically elongated pressure vessel A compressed gas dehumidifier is provided, which is housed in an outer cylindrical housing provided in a cylindrical shape, and has an upper chamber provided in the shape of a small chamber above the first heat exchanger section and the second heat exchanger section, and has a reheating channel outlet provided at the upper end of the first heat exchanger section and a gas outlet for discharging the secondary compressed air to the outside, which communicate from the reheating channel to the inside of the upper chamber, and has an outlet pipe section provided on the side of the upper chamber so as to be connected laterally when in use, and has an outlet pipe section provided on the side of the upper chamber so as to be connected laterally when in use, wherein a pre-cooling channel inlet is provided at the upper end of the first heat exchanger section to introduce the primary side compressed gas into the pre-cooling channel, and has an outlet pipe section provided on the side of the upper chamber and passing through the inside of the upper chamber so as to be connected laterally when in use.

[0010] Furthermore, according to one embodiment of the compressed gas dehumidifier according to the present invention, the gas inlet of the inlet pipe section and the gas outlet of the discharge pipe section are provided to be at substantially the same height when in use.

[0011] Furthermore, according to one embodiment of the compressed gas dehumidifier according to the present invention, the gas inlet of the inlet pipe section and the gas outlet of the discharge pipe section are arranged to be in opposite positions laterally when in use.

[0012] Furthermore, according to one embodiment of the compressed gas dehumidifier according to the present invention, fins that enhance heat exchange are provided on the outside of the inlet pipe section located inside the upper chamber.

[0013] Furthermore, according to one embodiment of the compressed gas dehumidifier of the present invention, the cooling fluid may be characterized by being chilled water or a refrigerant for a refrigeration cycle. [Effects of the Invention]

[0014] The compressed gas dehumidifier according to the present invention has the particularly advantageous effect of being able to maintain or improve dehumidification performance, and being able to be inline by effectively piping the inlet pipe section where the gas inlet is formed and the outlet pipe section where the gas outlet is formed at the same height. [Brief explanation of the drawing]

[0015] [Figure 1] These are schematic plan views (top) and front views (bottom) illustrating the external appearance of an example of a compressed gas dehumidifier according to the present invention. [Figure 2] This is a cross-sectional view along line AA of the example configuration shown in Figure 1. [Figure 3] This is a cross-sectional view of the example configuration shown in Figure 1, along line BB. [Figure 4] This is a cross-sectional view of the embodiment example shown in Figure 1, along line CC. [Figure 5] This is a cross-sectional view along the DD line of the example configuration shown in Figure 1. [Modes for carrying out the invention]

[0016] The following describes in detail examples of the configuration of the compressed gas dehumidifier according to the present invention, based on the attached drawings (Figures 1 to 5).

[0017] As the compressed gas dehumidifying device to which the present invention is applied, a heat exchanger is provided in two stages of a first heat exchanger section 10 and a second heat exchanger section 20 so as to dehumidify the primary compressed gas introduced from the outside by heat exchange and discharge the dehumidified secondary compressed gas to the outside. The first heat exchanger section 10 is provided such that a pre-cooling flow path 11 for the primary compressed gas and a re-heating flow path 12 for the secondary compressed gas are arranged so as to intersect with each other so as to pre-cool the primary compressed gas and re-heat the secondary compressed gas. The second heat exchanger section 20 is provided so as to cool the primary compressed gas pre-cooled by the first heat exchanger section 10 by a cooling fluid flowing through a cooling pipe 22 disposed in the second heat exchanger section 20, thereby causing condensation to occur and dehumidifying.

[0018] Examples of the cooling fluid flowing through the flow path by the cooling pipe 22 include cold water and a refrigerant of a refrigeration cycle. Further, as the cold water, groundwater or cooling water appropriately generated by heat exchange in factory facilities or the like can be used.

[0019] Further, as the compressed gas dehumidifying device to which the present invention is applied, the first heat exchanger section 10 and the second heat exchanger section 20 are arranged adjacent to each other and arranged to be vertically long when in use, and are provided inside an outer cylindrical housing 30 provided in a vertically long pressure vessel shape. An upper chamber 31 provided in a small chamber shape is provided above the first heat exchanger section 10 and the second heat exchanger section 20. A re-heating flow path outlet 12b provided at the upper end portion 10a of the first heat exchanger section 10 and a gas outlet 33a for discharging the secondary compressed air to the outside are formed so as to communicate from the re-heating flow path 12 to the inside of the upper chamber 31. A discharge pipe portion 33 provided on the side portion of the upper chamber 31 is provided so as to be connectable in the horizontal direction when in use.

[0020] In the compressed gas dehumidifying device according to the present invention, a pre-cooling flow path inlet 11a opened at the upper end portion 10a of the first heat exchanger section 10 and a gas inlet 32a for introducing the primary-side compressed gas from the outside into the pre-cooling flow path 11 are formed so as to introduce the primary-side compressed gas into the pre-cooling flow path 11. A guiding inlet pipe section 32 is provided which connects from the side portion of the upper chamber 31 through the inside of the upper chamber 31 to the pre-cooling flow path inlet 11a so that it can be connected horizontally during use.

[0021] According to this, the dehumidifying performance can be maintained or improved, and there is a particularly advantageous effect that the guiding inlet pipe section 32 in which the gas inlet 32a is formed and the discharge pipe section 33 in which the gas outlet 33a is formed can be piped at substantially the same height and thus inlined.

[0022] That is, in addition to the pre-cooling and reheating heat exchanges performed by the first heat exchanger section 10, since the guiding inlet pipe section 32 has a structure passing through the inside of the upper chamber 31, additional heat exchange between the primary-side compressed gas flowing through the inside of the guiding inlet pipe section 32 and the secondary-side compressed gas flowing through the inside of the upper chamber 31 is performed, namely, pre-cooling related to the primary-side compressed gas and reheating related to the secondary-side compressed gas. As a result, the dehumidifying performance can be maintained or improved, and by providing the gas inlet 32a of the guiding inlet pipe section 32 and the gas outlet 33a of the discharge pipe section 33 at the side portion of the upper chamber 31, they can be piped at substantially the same height, which has the advantage of improving the installation property.

[0023] In the embodiment shown in FIGS. 1 to 5 of the compressed gas dehumidifying device according to the present invention, an outer cylindrical housing 30 having a circular cross section and a built-in cylindrical housing 21 having a circular cross section arranged eccentrically with respect to the axis of the outer cylindrical housing 30 and built in inside the outer cylindrical housing 30 are provided so that the first heat exchanger section 10 and the second heat exchanger section 20 are arranged adjacent to each other within the pressure vessel. The upper end cover plate 34 and the lower end cover plate 36 are constituent members of the outer cylindrical housing 30 and are end plates closing the ends of the pressure vessel.

[0024] Then, the first heat exchanger section 10 is formed by arranging heat exchange components (in this embodiment, multiple reheat pipes 13 that form a reheat flow path 12 and a pre-cooling partition wall 14 that forms a pre-cooling flow path 11) mainly in the wider part of the space inside the outer cylindrical housing 30 where the built-in cylindrical housing 21 is not installed.

[0025] Furthermore, a second heat exchanger section 20 is formed by arranging heat exchange components (in this embodiment, a cooling pipe 22 with fins 22b attached, and a cooling partition wall 24 that forms a cooling flow path 23) inside the internal cylindrical housing 21. The upper end plate 21a is a component of the internal cylindrical housing 21 and serves as an end plate that closes the upper end.

[0026] More specifically, as shown in Figure 4, the pre-cooling channel 11 is a space in which multiple reheat pipes 13 are lined up, and the space outside the reheat pipes 13 is partitioned by multiple pre-cooling partition walls 14 in an appropriate number of stages in the vertical direction (up and down direction), leaving some vertical openings (passages).

[0027] In this embodiment, the multiple pre-cooling partitions 14 function as members (holding plates) that hold the multiple reheating pipes 13 so that they stand in a forest at the required intervals. Furthermore, the opposite ends in the lateral (left-right) direction (see Figures 3-5) are alternately cut out in multiple stages in the vertical direction, and pre-cooling cutout passages 14a, which are openings for circulating compressed air from top to bottom, are provided.

[0028] With the pre-cooling partition walls 14 separating the upper and lower stages, and the pre-cooling notched passages 14a provided in these pre-cooling partition walls 14, as shown by the black-colored arrows (see Figure 4), compressed gas can be circulated sequentially from the top to the bottom stages by flowing it through a long-distance flow path that is bent in a zigzag pattern from side to side, thereby enabling efficient heat exchange.

[0029] Furthermore, as shown in Figure 2, the cooling channel 23 is a space in which cooling pipes 22, arranged in a configuration that folds up and down multiple times, are lined up, and the space outside the cooling pipes 22 is partitioned by multiple cooling partition walls 24 in the vertical direction (up and down direction) in an appropriate number of stages, leaving some openings (passages) in the vertical direction.

[0030] In this embodiment, the multiple cooling partitions 24 function as members (holding plates) that hold the cooling pipes 22, which are folded up and down multiple times, so that they stand in a forest at the required intervals. Furthermore, in multiple stages in the vertical direction, opposite arc sections in the horizontal direction (left and right direction) (see Figures 2, 3, and 5) are alternately cut out, and cooling notched passages 24a are provided to allow compressed air to flow from top to bottom.

[0031] With the cooling partitions 24 that separate the upper and lower sections, and the cooling notches 24a provided in the cooling partitions 24, as shown by the gray arrows (see Figure 2), compressed gas can be circulated sequentially from the top to the bottom section by flowing it through a long channel that is bent in a zigzag pattern from side to side, thereby enabling efficient heat exchange.

[0032] Furthermore, the outer cylindrical housing 30 and the inner cylindrical housing 21 are arranged in a vertically elongated pressure vessel shape so that the first heat exchanger section 10 and the second heat exchanger section 20 are positioned vertically when in use.

[0033] Furthermore, the narrower portion of the space inside the outer cylindrical housing 30 where the built-in cylindrical housing 21 is not installed forms a communication space 15 through which the pre-cooled primary compressed gas flows from the first heat exchanger section 10 to the second heat exchanger section 20.

[0034] In this embodiment, the pre-cooling channel inlet 11a is an opening to which the inlet pipe section 32, which is an elbow-type pipe, is continuously connected, as shown in Figures 2 and 3, and is provided in a circular shape on the upper end portion 10a of the partition plate that separates the first heat exchanger section 10 and the upper chamber 31.

[0035] The upper end portion 10a, which is a partition plate-like section where the pre-cooling channel inlet 11a is formed, cannot accommodate the reheat pipe 13 (see Figures 3-5). However, the space required for the reheat pipe 13 (the area of ​​the upper end portion 10a) can be compensated for by extending the first heat exchanger section 10 to both ends. The upper end portion 10a also serves as an end-face pipe bundle plate for fixing a large number of reheat pipes 13 in an airtight, bundled state.

[0036] According to this, the space of the communication space 15 connecting the first heat exchanger section 10 to the second heat exchanger section 20 will be reduced. However, the space of the first heat exchanger section 10 can be expanded to a extent that does not substantially affect the airflow resistance of compressed air, thereby maintaining dehumidification performance.

[0037] Here, based on Figures 2 to 5, the flow of compressed air, from the gas inlet 32a to the gas outlet 33a, will be explained in detail below. As shown in Figures 3 and 5, 16 is a partition wall for forming a communication space, and is provided in the form of a pair of plate-like structures extending parallel to the axis, separating the first heat exchanger section 10 and the communication space section 15, except for the part that connects at one of the lower ends (pre-cooling flow path outlet 11b).

[0038] First, as shown in Figures 2 and 3, the primary compressed gas is introduced from the gas inlet 32a of the inlet pipe section 32, passes through the inlet pipe section 32, and is introduced into the pre-cooling channel 11 from the pre-cooling channel inlet 11a. At this time, including the effect of the fins 32b described later, heat exchange takes place between the primary compressed gas and the secondary compressed gas in the upper chamber 31, causing the primary compressed gas to cool (initial pre-cooling) and the secondary compressed gas to heat (later reheating).

[0039] The primary side compressed gas introduced into the pre-cooling channel 11 is guided in multiple stages by the pre-cooling partition wall 14 and the pre-cooling notched passage 14a provided therein, and flows in a zigzag pattern from the upper stage to the lower stage, as shown by the black arrows in Figure 4, and is pre-cooled by sequentially passing back and forth through the pre-cooling channel 11, which is a space where reheat pipes 13 are lined up. At this time, the secondary side compressed gas is reheated.

[0040] Next, the primary compressed gas flows from the pre-cooling channel 11 into the communication space 15 through a pre-cooling channel outlet 11b, which is provided by cutting out the lower end of one side of the partition wall 16 that separates the first heat exchanger section 10 and the communication space section 15, as shown by the gray arrows in Figures 2, 3, and 5. The primary compressed gas then flows from bottom to top in the communication space section 15 and is introduced into the cooling channel 23 through a cooling channel inlet 23a that opens at the top of the second heat exchanger section 20. Inside the second heat exchanger section 20, the compressed gas is cooled and dehumidified by cooling pipes 22 equipped with fins 22b arranged for heat exchange.

[0041] Furthermore, within this second heat exchanger section 20, the compressed gas introduced into the cooling channel 23 is guided in multiple stages by the cooling partition wall 24 and the cooling notched passage 24a provided therein, and flows in a zigzag pattern from the upper stage to the lower stage, as shown by the gray arrows in Figure 2. As a result, the compressed gas is efficiently cooled in a limited space by sequentially passing back and forth through the cooling channel 23, which is a space where cooling pipes 22 equipped with fins 22b are lined up.

[0042] The compressed gas, cooled and dehumidified in this manner, flows through an extended cooling channel section 25, which is formed to protrude into the lower chamber 35 and extend below the lower partition plate 35a that holds the second heat exchanger section 20 at its lower part, as shown in Figure 2. It then passes through a demister 28, which is a condensation aggregation member located in a D-shaped cylindrical section 26 (see Patent Document 3) located further below, and flows into the lower chamber 35 through the lower end opening 27a and side opening 27b that constitute the cooling channel outlet 27. The condensed water is discharged to the outside through the cooling channel outlet 27 via a drain discharge valve device (not shown) connected to the drain discharge port 37a of the drain section 37.

[0043] The compressed gas that flows into the lower chamber 35 in this manner is dehumidified by condensation and becomes secondary compressed gas. This secondary compressed gas is then introduced into the reheat flow path 12, which is composed of multiple reheat pipes 13, through the reheat flow path inlet 12a, which is the lower end opening of the reheat pipes 13.

[0044] The compressed gas on the secondary side, having passed through the reheating channel 12, is then discharged into the upper chamber 31 from the reheating channel outlet 12b, which is the upper end opening of the reheating pipe 13, as shown by the white arrow in Figure 4. At this time, as explained above, the compressed gas on the secondary side is reheated, and the compressed gas on the primary side is pre-cooled. Finally, as shown by the white arrow in Figure 2, the compressed gas on the secondary side is discharged to the outside from the upper chamber 31 through the gas outlet 33a of the discharge pipe section 33.

[0045] Furthermore, according to this embodiment, as shown in Figures 1 and 2, the gas inlet 32a of the inlet pipe section 32 and the gas outlet 33a of the outlet pipe section 33 are provided to be at substantially the same height when in use, which allows for proper in-line integration and improves ease of installation.

[0046] Furthermore, according to this embodiment, as shown in Figure 1, the gas inlet of the inlet pipe and the gas outlet of the outlet pipe are positioned opposite each other in the lateral direction when in use. This allows the equipment to be connected and arranged in a straight line, enabling the rational construction of the equipment system in-line, which simplifies piping, reduces installation space, lowers ventilation resistance, and improves maintenance management.

[0047] Furthermore, in this embodiment, the fins 32b, which enhance heat exchange, are provided on the outside of the inlet pipe section 32 located inside the upper chamber 31. As a result, heat exchange with the secondary compressed gas is efficiently performed in the inlet pipe section 32 through which the hottest primary compressed gas passes, and the secondary compressed air can be rationally reheated just before being discharged to the outside. The shape, size, mounting direction, and mounting means of the fins 32b can be selectively designed as appropriate to ensure efficient heat exchange and ease of manufacturing. This improves heat exchange efficiency, thereby enabling improved performance and miniaturization of the device.

[0048] Furthermore, an example of the present invention is characterized in that the cooling fluid is chilled water or a refrigerant for a refrigeration cycle. That is, the cooling source used as a cooling means in the second heat exchanger section can be groundwater, chilled water supplied from a factory, or a refrigerator using a refrigeration cycle. [Industrial applicability]

[0049] The compressed gas dehumidifier of the present invention is not limited to its application in dehumidifying moisture from compressed gases such as compressed air, but can also be used, for example, to remove or separate and recover gaseous components with specific dew points, such as organic solvents, contained in compressed gases by condensation.

[0050] Although various preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. [Explanation of Symbols]

[0051] 10 First heat exchanger section 10a Upper end 11. Flow channel for pre-cooling 11a Pre-cooling channel inlet 11b Pre-cooling channel outlet 12 Reheating channel 12a Reheat channel inlet 12b Reheat channel outlet 13 Reheat pipe 14. Partition for pre-cooling 14a Notched passage for pre-cooling 15 Communication space 16 Partition walls for forming connecting spaces 20 Second heat exchanger section 21 Internal cylindrical housing 21a Upper end plate 22 Cooling piping 22b fins 23 Cooling channel 23a Cooling channel inlet 24 Cooling partitions 24a Cooling notch passage 25 Extended cooling channel section 26 D-shaped cylindrical part 27 Cooling channel outlet 27a Bottom opening 27b Side opening 28 Demister 30 Outer cylindrical housing 31 Upper small room 32 Inlet pipe section 32a Gas Inlet 32b fin 33 Outlet pipe section 33a Gas outlet 34. Upper end plate 35 Lower Komuro 35a Lower partition plate 36. Lower end plate 37 Drain section 37a Drain outlet

Claims

1. A heat exchanger is provided in two stages, a first heat exchanger section and a second heat exchanger section, to dehumidify the primary side compressed gas introduced from the outside by heat exchange, and to discharge the dehumidified secondary side compressed gas to the outside. The first heat exchanger section is provided such that it pre-cools the compressed gas on the primary side and reheats the compressed gas on the secondary side, by arranging the pre-cooling passage for the compressed gas on the primary side and the reheating passage for the compressed gas on the secondary side to intersect. The second heat exchanger section is provided to dehumidify the primary side compressed gas, which has been pre-cooled in the first heat exchanger section, by cooling it with a cooling fluid flowing through cooling pipes arranged in the second heat exchanger section, thereby causing condensation. The first heat exchanger section and the second heat exchanger section are arranged side by side and are positioned vertically when in use, and are housed in an outer cylindrical housing that is vertically elongated in the shape of a pressure vessel. An upper chamber, shaped like a small chamber, is provided above the first heat exchanger section and the second heat exchanger section. A reheating channel outlet is provided at the upper end of the first heat exchanger section so as to communicate from the reheating channel to the interior of the upper chamber, A compressed gas dehumidifier comprising a configuration in which a gas outlet is formed for discharging the compressed air on the secondary side to the outside, and an outlet pipe section provided on the side of the upper chamber so as to be connected laterally when in use, The compressed gas on the primary side is introduced into the pre-cooling channel through a pre-cooling channel inlet opened at the upper end of the first heat exchanger section, A compressed gas dehumidifier is characterized in that it has a configuration in which a gas inlet is formed for introducing the primary compressed gas from the outside into the pre-cooling channel, and it includes an inlet pipe that connects from the side of the upper chamber through the inside of the upper chamber to the pre-cooling channel inlet so that it can be connected laterally when in use.

2. The compressed gas dehumidifier according to claim 1, characterized in that the gas inlet of the inlet pipe section and the gas outlet of the discharge pipe section are provided to be at substantially the same height when in use.

3. The compressed gas dehumidifier according to claim 2, characterized in that the gas inlet of the inlet pipe section and the gas outlet of the discharge pipe section are arranged so as to be in opposite positions laterally when in use.

4. The compressed gas dehumidifier according to claim 1, characterized in that fins for enhancing heat exchange are provided on the outside of the inlet pipe portion located inside the upper chamber.

5. The compressed gas dehumidifier according to any one of claims 1 to 4, characterized in that the cooling fluid is chilled water or a refrigerant for a refrigeration cycle.

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