JP2007187367A - Humidification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a humidification device having heightened humidification efficiency, and allowing miniaturization of the device. <P>SOLUTION: In this humidification device, a hollow fiber membrane bundle 30 is involved inside a cylindrical case 20, one end of the hollow fiber membrane bundle 30 is provided with a first flow passage wall 40, the other end is provided with a second flow passage wall 50, and a portion between the first flow passage wall 40 and the second flow passage wall 50 is set as a water exchange part 32. Both of a face 41 on an inflow side buffer part side and a face 42 on the water exchange part 32 side in the first flow passage wall 40, and both of a face 51 on an outflow side buffer part side and a face 52 on the water exchange part 32 side in the second flow passage wall 50 each have an inclination in the same direction to a flow direction of a first fluid. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a humidifier that humidifies gas supplied to a fuel cell, for example, and more particularly to a humidifier having a water-permeable hollow fiber membrane.

For example, in a system including a polymer electrolyte fuel cell, a humidifier is used to exchange moisture with gas supplied to the fuel cell from the wet gas discharged from the fuel cell. As such a humidifier, the thing of the following patent document 1 is proposed.
Japanese Patent Laying-Open No. 2004-6309 (paragraph 0080, FIG. 17)

  However, in the structure of the humidifier as in Patent Document 1, there is a problem that a region that makes it difficult for fluid to flow through the outside of the hollow fiber membrane provided in the cylindrical case occurs. That is, with reference to FIG. 9, in the conventional humidifier 100, a hollow fiber is formed between the flow path wall (potting part) 102 and the flow path wall (potting part) 103 at both ends of the hollow fiber membrane bundle 101. A region where the fluid passing outside the membrane easily flows (see an arrow) and a region where the fluid hardly flows (dead space) are generated, which causes a pressure loss of the fluid passing inside the hollow fiber membrane. As a result, the humidification efficiency decreases. Further, adjacent to the flow path walls 102 and 103, the fluid is discharged from the inside of the hollow fiber membrane and the buffer part for introducing the fluid into the inside of the hollow fiber membrane, separately from the moisture exchange part for performing humidification. Therefore, there is a problem that the buffer unit 105 is not sufficiently studied and the humidifier is increased in size.

  This invention solves the said conventional problem, and makes it a subject to provide the humidification apparatus which can aim at size reduction of an apparatus while improving humidification efficiency.

  The invention according to claim 1 includes a case enclosing a bundle of hollow fiber membranes in which a plurality of hollow fiber membranes are bundled, and an inflow side buffer section for allowing a first fluid flowing from the outside of the case to flow into the plurality of hollow fiber membranes. And a first flow path wall having a plurality of openings for allowing the first fluid to flow inside the hollow fiber membrane adjacent to the inflow side buffer portion, and to flow out from the inside of the plurality of hollow fiber membranes. An outflow side buffer portion that causes the first fluid to flow out to the outside of the case, and a plurality of openings that allow the first fluid that passes through the inside of the hollow fiber membrane to flow out adjacent to the outflow side buffer portion. A second flow path wall, an inflow port for allowing the second fluid to flow into the outside of the hollow fiber membrane from the outside of the case, and an outflow port for allowing the second fluid to flow out of the case from the outside of the hollow fiber membrane Including moisture inside and outside the hollow fiber membrane A humidifying device having a moisture exchange part that exchanges moisture by flowing a first fluid and a second fluid different from each other in at least one of the first channel wall and the second channel wall; Both surfaces with the surface on the moisture exchange part side are configured to have an inclination in the same direction with respect to the flow direction of the first fluid flowing inside the hollow fiber membrane.

  According to the first aspect of the present invention, at least one of the first flow path wall and the second flow path wall is inclined with a predetermined angle with respect to the first fluid flowing inside the hollow fiber membrane. Thereby, the location (dead space) where it is difficult for the second fluid introduced to the outside of the hollow fiber membrane to pass through can be reduced, thereby improving the space efficiency. In addition, by forming the flow path wall diagonally, a hollow fiber membrane of a length that has hardly contributed to moisture exchange is formed short, and the space surrounded by the flow path wall and the case is used as a buffer part Therefore, it is possible to reduce the size of the apparatus. Furthermore, since the length of the hollow fiber membrane can be shortened, the pressure loss of the first fluid passing through the inside of the hollow fiber membrane can be reduced.

  In the invention according to claim 2, the end of the hollow fiber membrane is formed obliquely with respect to the flow direction of the first fluid flowing inside the hollow fiber membrane, and the end of the hollow fiber membrane It is characterized by being formed at an angle in the same direction as the wall.

  According to the invention of claim 2, since the opening area of the end of the hollow fiber membrane can be enlarged, the first fluid can easily flow into the hollow fiber membrane, and the pressure loss in the hollow fiber membrane can be reduced. Decrease.

  The invention according to claim 3 is characterized in that the inflow port and the outflow port are arranged at positions serving as counter electrodes when viewed from the flow direction of the first fluid flowing inside the hollow fiber membrane.

  According to the invention which concerns on Claim 3, since the distance which performs a water | moisture content exchange between the 1st fluid which flows inside the hollow fiber membrane and the 2nd fluid which flows outside can be lengthened, a water exchange rate is improved. be able to.

  In the invention according to claim 4, the inlet provided in the buffer part on the inflow side to introduce the first fluid, and the outlet provided in the buffer part on the outflow side to discharge the first fluid are: The inflow side buffer part and the outflow side buffer part are arranged on the long side.

  According to the invention which concerns on Claim 4, it becomes easy to make a 1st fluid flow in into an inner side of a hollow fiber membrane by arrange | positioning an inlet in the side with a long depth. In addition, in the case where the inlet and outlet are arranged in pairs, both the inlet and the outlet are arranged on the long depth side, so that it is difficult for the portion that flows easily on the inlet side to flow on the outlet side. On the contrary, since it is easy to flow on the discharge port side where it is difficult to flow on the introduction port side, the first fluid can be made to flow uniformly over the entire hollow fiber membranes.

  ADVANTAGE OF THE INVENTION According to this invention, the humidification apparatus which can aim at size reduction of an apparatus while improving humidification efficiency can be provided.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. Before describing the humidifier according to the embodiment of the present invention, a system to which the humidifier is applied will be described with reference to FIG. 1 as an example. FIG. 1 is a block diagram showing an example of a fuel cell system provided with a humidifier according to this embodiment.

  The fuel cell system FCS shown in FIG. 1 includes a fuel cell 1, an air supply device AS, a hydrogen supply device HS, and the like.

  The fuel cell 1 is divided into a cathode electrode (oxygen electrode) and an anode electrode (hydrogen electrode) with an electrolyte membrane interposed therebetween, and electrodes each containing a white metal catalyst are provided on each electrode side. An anode electrode is formed. Further, in this fuel cell 1, when air A is supplied as an oxidant gas to the cathode electrode and hydrogen H is supplied as the fuel gas to the anode electrode, hydrogen is ionized by the catalytic action to generate protons and electrons. The generated protons move through the electrolyte membrane and move to the cathode electrode. Protons that reach the cathode electrode immediately react with oxygen and electrons in the air A in the presence of a catalyst to produce water. The generated air A containing water and oxygen is discharged from the cathode as air Ae. In the anode electrode, electrons are generated when hydrogen is ionized, and the generated electrons move to the cathode electrode via an external load.

  The air supply device AS includes an air cleaner 3, a compressor 4, a pressure control valve 5 and the like in addition to the humidifying device 2 according to the embodiment of the present invention. In the flow path for supplying air A to the fuel cell 1, a humidifier 2 is disposed upstream of the fuel cell 1, a compressor 4 is disposed upstream of the humidifier 2, and an air cleaner is disposed upstream of the compressor 4. 3 is arranged. Further, in the flow path for discharging the air Ae from the fuel cell, the humidifying device 2 is disposed on the downstream side of the fuel cell 1, and the pressure control valve 5 is disposed on the downstream side thereof.

  The humidifier 2 humidifies the air A processed by the air cleaner 3 and supplied by the compressor 4 and supplies the humidified air to the fuel cell 1, details of which will be described later.

  The air cleaner 3 includes a filter (not shown) and the like, filters the air A supplied to the cathode electrode side of the fuel cell 1 and removes dust, oil, and the like contained in the supplied air A.

  The compressor 4 includes a positive displacement compressor such as a supercharger (not shown) and a motor for driving the compressor 4. The compressor 4 compresses air A used as an oxidant gas in the fuel cell 1 and sends it out to the humidifier 2. To supply. Due to the output of the compressor 4, the supplied air A is sent to the cathode electrode side of the fuel cell 1 through the humidifier 2, and is sent to the humidifier 2 after passing through the fuel cell 1.

  The pressure control valve 5 is composed of a not-shown butterfly valve and an actuator (for example, a stepping motor) that drives the valve, and reduces or increases the valve opening of the cathode off-gas pressure discharged from the fuel cell 1. Control.

  On the other hand, the hydrogen supply device HS includes a hydrogen gas cylinder 11, a regulator 12, an ejector 13, a purge valve 14, and the like.

  The hydrogen gas cylinder 11 stores hydrogen H introduced into the anode side of the fuel cell 1. The hydrogen H to be stored is high-purity hydrogen, and the pressure is, for example, 15 to 35 MPa. In addition, the hydrogen gas cylinder 11 can also use the hydrogen storage alloy type which contains a hydrogen storage alloy and stores hydrogen with the pressure of about 1 MPa.

  The regulator 12 is a pressure control valve that includes a diaphragm (not shown), a pressure adjustment spring, and the like, and reduces the hydrogen H stored at a high pressure to a predetermined pressure so that it can be used at a constant pressure.

  The ejector 13 is a kind of vacuum pump for circulating hydrogen as a fuel gas supplied to the anode electrode, and the main part is composed of a nozzle, a diffuser, a suction chamber, and the like.

  The purge valve 14 is a shut-off valve. When the purge valve 14 is closed, unreacted hydrogen He discharged from the fuel cell 1 is supplied to the fuel cell 1 again through the ejector 13 to use hydrogen as fuel. Increases efficiency.

  In the fuel cell system FCS configured as described above, the air A passing through the cathode electrode of the fuel cell 1 via the humidifier 2 causes the electrolyte membrane of the fuel cell 1 to reach saturated humidity before passing through the cathode electrode. Moisten. When protons that have moved from the anode electrode into the electrolyte membrane reach the cathode electrode, the protons, oxygen in the air A, and electrons generated at the anode electrode react to generate water in the presence of the catalyst. The generated water is discharged from the fuel cell 1 together with the air As discharged from the fuel cell 1, and is supplied to the humidifier 2 provided on the downstream side of the fuel cell 1. In this humidifying device 2, air Ae passes through the inside of each hollow fiber membrane, which will be described later, and air A passes through the outside, and the air A is humidified by moisture moving from the air Ae. Therefore, in order to obtain a stable output of the fuel cell 1, it is effective to increase the humidifying efficiency in the humidifying device 2.

  Hereinafter, the humidification apparatus 2 which concerns on embodiment of this invention is demonstrated, referring drawings. 2 is a perspective view showing the humidifying device of the present embodiment, FIG. 3 is a view taken in the direction of the arrow A in FIG. 2, FIG. 4 is a cross-sectional view taken along the line BB in FIG. An enlarged perspective view showing the end of the yarn membrane, (b) is an enlarged perspective view showing the end of the hollow fiber membrane in the conventional embodiment, and FIGS. 6 and 7 explain the operation of the humidifying device of the present embodiment. FIG.

  As shown in FIG. 2, the humidifying device 2 of the present embodiment includes a case 20, a hollow fiber membrane bundle 30, a first flow path wall 40, a second flow path wall 50, and the like.

  The case 20 includes a cylindrical cylindrical body 21 and disk-shaped lid bodies 22 and 23 that close openings formed at both ends of the cylindrical body 21. Further, the outer peripheral surface of the cylindrical body 21 is provided with an inflow port 21 a communicating with the inside of the case 20 in the vicinity of the inside of the first flow path wall 40, and the inside of the case 20 in the vicinity of the inside of the second flow path wall 50. An outflow port 21b that communicates is provided. Moreover, the inflow port 21a and the outflow port 21b are arrange | positioned in the position which becomes a counter electrode in the distribution direction view of a 1st fluid, as shown in FIG. The second fluid (air Ae) having a high water content discharged from the cathode electrode of the fuel cell 1 is introduced from the inlet 21a, and the humidified second fluid is discharged from the outlet 21b. The lid 22 is provided with an introduction port 22 a that communicates with the inside of the case 20, and the lid 23 is provided with a discharge port 23 a that communicates with the inside of the case 20. The dried first fluid (air A) before being supplied to the cathode electrode of the fuel cell 1 is introduced from the inlet 22a, and the humidified first fluid is discharged from the outlet 23a.

  The hollow fiber membrane bundle 30 is configured by bundling a plurality of hollow fiber membranes 31 and is arranged so as to be dense in the case 20. Each hollow fiber membrane 31 has an infinite number of capillaries, and water vapor contained in the second fluid (air Ae) introduced to the outside of the hollow fiber membrane 31 is condensed in the capillaries, so that the hollow fiber membrane 31 As a result, the moisture is transferred to the first fluid (air A). 2 and 4, for convenience of explanation, the number of the hollow fiber membranes 31 is reduced from the actual number, and the interval between the hollow fiber membranes 31 is increased.

  As shown in FIG. 4, the first flow path wall 40 is a so-called potting portion, and is disposed at one end (left side in the figure) of the hollow fiber membrane bundle 30 between the outer peripheral surfaces of the hollow fiber membranes 31. The outer peripheral surface of the hollow fiber membrane 31 and the inner peripheral surface of the case 20 (tubular body 21) are formed so as to be closed. At this time, on the end surface of the first flow path wall 40 (surface 41 on the inflow side buffer portion R1 described later), a plurality of openings 31a are formed by the hollow fiber membranes 31 from the introduction port 22a. The introduced first fluid passes through the inside of each hollow fiber membrane 31.

  Similarly to the first flow path wall 40, the second flow path wall 50 is formed between the outer peripheral surfaces of the hollow fiber membranes 31 at the other end of the hollow fiber membrane bundle 30 (right side in the figure). The outer peripheral surface and the inner peripheral surface of the case 20 (tubular body 21) are formed so as to be closed. At this time, a plurality of openings 31b (see FIG. 3) formed by the hollow fiber membranes 31 are formed on the end surface of the second flow path wall 50 (a surface 51 on the outflow side buffer portion R2 described later). The first fluid that has passed through the inside of each hollow fiber membrane 31 is discharged from the discharge port 23a.

  Note that a region sandwiched between the first flow path wall 40 and the second flow path wall 50 (see the double arrows in FIGS. 2 and 3) functions as a moisture exchange section 32 that performs moisture exchange. Yes.

  The first flow path wall 40 is formed to be inclined with respect to the flow direction of the first fluid, that is, to be inclined with respect to the inner wall surface of the lid body 22 so that the side far from the inflow port 21a is separated. A space surrounded by the flow path wall 40 and the case 20 (a part of the cylindrical body 21 and the lid body 22) is configured to play a role as the inflow side buffer portion R1. More specifically, the first flow path wall 40 is formed such that a surface 41 on the inflow side buffer portion R1 side forms an angle α with respect to the flow direction of the first fluid, and a surface on the moisture exchange portion 32 side. 42 is formed at the same angle α with respect to the flow direction of the first fluid, that is, both surfaces 41 and 42 are inclined in the same direction with respect to the flow direction of the first fluid.

  In addition, the second flow path wall 50 is formed to be inclined with respect to the flow direction of the first fluid, that is, to be inclined with respect to the inner wall surface of the lid 23 so that the side farther from the outlet 21b is separated. A space surrounded by the flow path wall 50 and the case 20 (a part of the cylindrical body 21 and the lid body 23) is configured to serve as the outflow side buffer portion R2. More specifically, the second flow path wall 50 is formed so that the surface 51 on the outflow side buffer portion R2 side forms an angle β with respect to the flow direction of the first fluid, and on the water exchange portion 32 side. The surface 52 is similarly formed at an angle β with respect to the flow direction of the first fluid, that is, the both surfaces 51 and 52 are configured to be inclined in the same direction with respect to the flow direction of the first fluid. .

  In the present embodiment, the angle α of the first flow path wall 40 and the angle β of the second flow path wall 50 are formed to be substantially the same angle, but are not necessarily the same angle. Depending on how the second fluid flows, that is, different angles may be used so that the dead space is minimized.

  As a result, the first fluid (white arrow) with a low water content introduced from the inlet 22a into the inflow side buffer portion R1 passes through the inside of the hollow fiber membrane 31 from each opening 31a of the first flow path wall 40. After passing through the moisture exchange part 32 and passing through the inlet 21a and passing through the outside of the hollow fiber membrane 31, the moisture is exchanged with the second fluid having a high moisture content to be humidified. It flows out from each opening part 31b of the flow-path wall 50, and is discharged | emitted from the discharge port 23a through the outflow side buffer part R2. Further, the second fluid introduced from the inlet 21a and humidifying the first fluid is discharged from the case 20 through the outlet 21b.

  As described above, in the humidifying device 2 of the present embodiment, the first flow path wall 40 and the second flow path wall 50 are configured with a predetermined angle with respect to the flow of the first fluid. It becomes possible to reduce the dead space that has been caused by the fact that the second fluid becomes difficult to flow, and it is possible to increase the space efficiency.

  In the present embodiment, the first flow path wall 40 and the second flow path wall 50 are configured obliquely in the case 20 as described above, so that a space is formed between the first flow path wall 40 and the case 20. And this space is used as the inflow side buffer portion R1, and a space is formed between the second flow path wall 50 and the case 20, and this space is used as the outflow side buffer portion R2. The apparatus 2 can be downsized. That is, the length dimension from the inflow side buffer portion R1 to the outflow side buffer portion R2 of the humidifier 2 is L1 (see FIG. 6), and the length from the inflow side buffer portion 104 to the outflow side buffer portion 105 of the conventional humidifier 100 is set. When the length dimension is La (see FIG. 9), L1 <La can be achieved, so that the dimension in the longitudinal direction of the humidifying device 2 can be shortened and the size can be reduced.

  Further, in the present embodiment, since the length of each hollow fiber membrane 31 can be shortened by reducing the dead space, it becomes possible to reduce the pressure loss of the first fluid passing through the inside of the hollow fiber membrane 31, The first fluid can be easily flown into the hollow fiber membrane 31. That is, the length dimension of the hollow fiber membrane 31 in the humidifier 2 is L2 (see FIG. 6), and the length dimension of the hollow fiber membrane in the conventional humidifier 100 is Lb (see FIG. 9) as shown in FIG. Since L2 <Lb, the hollow fiber membrane 31 can be shortened to reduce the pressure loss with respect to the first fluid.

  Moreover, in this embodiment, in the 1st flow-path wall 40, by forming the edge part of each hollow fiber membrane 31 diagonally with respect to the flow direction of a 1st fluid, as shown to Fig.5 (a), In the humidifying device 2 of the present embodiment, the shape of the opening 31a at the end of the hollow fiber membrane 31 is an ellipse (opening area S1). Further, the end portion of the hollow fiber membrane 31 is configured to form an angle α (see FIG. 4) in the same direction as the surface 41 of the first flow path wall 40 on the inflow side buffer portion R1 side. Therefore, compared with the case where the shape of the opening at the end of the hollow fiber membrane in the conventional humidifier 100 shown in FIG. 5B is circular (opening area S2), the opening area can be increased. Therefore, inflow of the first fluid into the hollow fiber membrane 31 is facilitated.

  Moreover, in this embodiment, as shown in FIG. 3, the inflow port 21a and the outflow port 21b are a counter electrode with respect to the flow direction (perpendicular to the paper surface) of the first fluid flowing inside the hollow fiber membrane 31. 3, that is, the inflow port 21 a is formed at the lower end of FIG. 3 and the outflow port 21 b is disposed at the upper end on the opposite side of 180 degrees, so that the first fluid that flows inside the hollow fiber membrane 31 and the outside flows Since the distance at which the second fluid exchanges moisture can be set long, the moisture exchange rate can be improved.

  In the present embodiment, as shown in FIG. 4, the introduction port 22a for introducing the first fluid into the case 20 is arranged on the side where the depth of the inflow side buffer portion R1 is increased, thereby providing the first The fluid can be easily flown into the hollow fiber membrane 31. Further, by arranging the introduction port 22a on the side where the depth of the inflow side buffer portion R1 becomes longer, and by arranging the discharge port 23a on the side where the depth of the outflow side buffer portion R2 becomes longer, as shown in FIG. On the inflow side buffer portion R1 side, the first fluid is likely to flow into the inside of the hollow fiber membrane 31 on the long depth side, and the first fluid is difficult to flow on the short depth side, whereas in the outflow side buffer portion R2, The first fluid is difficult to flow out on the short depth side and the first fluid is easily flowed out on the long depth side, so that the distribution of pressure loss is equalized and the entire flow path passing through the inside of each hollow fiber membrane 31 The first fluid can be made to flow evenly.

  FIG. 8 is a perspective view showing a modification of the humidifying device of the present embodiment. The humidifying device 2A shown in FIG. 8 has the same basic structure as the humidifying device 2 described above, and has a rectangular tubular body 61 and a square plate-like lid 62 that closes the openings at both ends of the tubular body 61. , 63 is provided with a hollow fiber membrane bundle 30 composed of a plurality of hollow fiber membranes 31, a first flow path wall 70, and a second flow path wall 80. The first flow path wall 70 and the second flow path wall 80 are both formed in a quadrangular shape in accordance with the shape of the case 60, and have a predetermined angle with respect to the flow direction (not shown) of the first fluid. Is formed obliquely. Even the humidifying device 2A having such a shape has the same effect as the humidifying device 2.

  Note that the shapes of the humidifier cases 20 and 60 are not limited to cylinders or square tubes, but may be other shapes. Further, the cases 20 and 60 are not limited to those formed linearly in the longitudinal direction, and may be curved shapes. Further, the inflow port 21a and the outflow port 21b may be arranged in reverse so that the first fluid and the second fluid flow in opposition.

  Further, in the above-described embodiment, the first flow path wall 40 and the second flow path wall 50 are provided at both ends of the hollow fiber membrane bundle 30, but either the first flow path wall 40 or the second flow path wall 50 is provided. Even in this case, the dead space can be reduced, the space efficiency can be increased, and the moisture exchange rate can be improved.

It is a block diagram which shows an example of the fuel cell system provided with the humidification apparatus of this embodiment. It is a see-through | perspective perspective view which shows the humidification apparatus of this embodiment. FIG. 3 is a view as seen from an arrow A in FIG. 2. It is BB sectional drawing of FIG. (A) is an enlarged perspective view which shows the edge part of the hollow fiber membrane in this embodiment, (b) is an enlarged perspective view which shows the edge part of the hollow fiber membrane in conventional embodiment. It is the schematic for demonstrating the effect | action of the humidification apparatus of this embodiment. It is the schematic for demonstrating another effect | action of the humidification apparatus of this embodiment. It is a see-through | perspective perspective view which shows the modification of the humidification apparatus of this embodiment. It is the schematic for demonstrating the effect | action of the conventional humidifier.

Explanation of symbols

2 Humidifier 20 Case 21a Inlet 21b Outlet 22a Inlet 23a Outlet 30 Hollow Fiber Membrane 31 Hollow Fiber Membrane 31a Opening 32 Moisture Exchanger 40 First Channel Wall (First Channel Wall)
50 Second channel wall (second channel wall)
41, 51 Buffer side 42, 52 Moisture exchange side R1 Inflow side buffer (inflow side buffer)
R2 Outflow side buffer (outflow side buffer)

Claims (4)

A case containing a hollow fiber membrane bundle in which a plurality of hollow fiber membranes are bundled;
A buffer part on the inflow side for allowing the first fluid flowing from the outside of the case to flow into the plurality of hollow fiber membranes;
A first flow path wall having a plurality of openings that allow the first fluid to flow inside the hollow fiber membrane adjacent to the inflow side buffer section;
A buffer portion on the outflow side for collecting the first fluid flowing out from the inside of the plurality of hollow fiber membranes and outflowing the outside of the case;
A second flow path wall having a plurality of openings for allowing the first fluid passing through the inside of the hollow fiber membrane to flow out adjacent to the buffer portion on the outflow side;
An inlet for allowing the second fluid to flow from the outside of the case to the outside of the hollow fiber membrane;
An outlet for allowing the second fluid to flow out from the outside of the hollow fiber membrane to the outside of the case, and
In a humidifying device having a moisture exchange part that exchanges moisture by flowing a first fluid and a second fluid having different moisture contents inside and outside the hollow fiber membrane,
In at least one of the first flow path wall and the second flow path wall, the flow direction of the first fluid in which both surfaces of the buffer portion side surface and the moisture exchange portion side surface flow inside the hollow fiber membrane The humidifying device is characterized by having an inclination in the same direction with respect to.   The end of the hollow fiber membrane is formed obliquely with respect to the flow direction of the first fluid flowing inside the hollow fiber membrane, and the end of the hollow fiber membrane forms an angle in the same direction as the flow path wall. The humidifying device according to claim 1, wherein the humidifying device is configured as described above.   The said inflow port and the said outflow port are arrange | positioned in the position which becomes a counter electrode seeing from the flow direction of the 1st fluid which flows the inner side of the said hollow fiber membrane, The Claim 1 or Claim 2 characterized by the above-mentioned. Humidifier.   The inlet for introducing the first fluid provided in the buffer part on the inflow side and the outlet for discharging the first fluid provided on the buffer part on the outflow side are the buffer part on the inflow side and the buffer part on the outflow side. The humidifying device according to any one of claims 1 to 3, wherein the humidifying device is disposed on a long side of the.

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