JP2006021076A - Hollow fiber membrane dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hollow fiber membrane dryer that stops the supply of purge air at the resting time of the operation and supplies the purge air immediately at reopening the operation. <P>SOLUTION: In the hollow fiber membrane dryer equipped with a purge air supplying passage 24 allowing a part of dehumidified air to flow along the outer peripheral surface of the hollow fiber membrane, a supplying and stopping part 26 to supply and stop the dehumidified air is installed at the purge air supplying passage 24. In the supplying and stopping part 26, a first elastic membrane 36 to divide a compressed air chamber 30 and a dehumidified air chamber 34, and a second elastic membrane 38 equipped at the dehumidified air chamber 34 are installed at the first elastic membrane 36 side. A partition member 40 where the purge air supply passage 24 is opened at the end face to which the second elastic membrane 38 is attached, and an axis member 44 of which the end part is contacted with the second elastic membrane 38 and of which the other end part is mounted to the first elastic membrane 36 are installed. The axis member 44 presses the second elastic membrane 38 to the direction opened so that a part of the dehumidified air of the dehumidified air chamber 34 flows into the purge air supply passage 24 when the pressure of the compressed air chamber 30 becomes higher than that of the dehumidified chamber 34. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hollow fiber membrane dryer device, and more particularly to a hollow fiber membrane dryer device that dehumidifies based on a difference in vapor pressure of air flowing inside and outside the hollow fiber membrane.

As an example of the hollow fiber membrane dryer device, FIG. 10 shows a hollow fiber membrane dryer device described in Patent Document 1 below. In the hollow fiber membrane dryer apparatus shown in FIG. 10, a compressed air supply unit 100 for compressed air to be dehumidified and a dehumidified air discharge unit 102 are linearly arranged on one end side of a cylindrical container 104. The compressed air supplied to the compressed air supply unit 100 is supplied to one end portion of the central passage 106 provided at the central portion of the cylindrical container 104, and the space portion 108 provided at the other end portion of the central passage 106. A hollow fiber membrane in which a large number of hollow fiber membranes are bundled between the outer peripheral surface of the central passage 106 and the inner wall surface of the cylinder 109 provided inside the cylindrical container 104. One end side of the bundle 110 faces.
The compressed air of the hollow fiber membrane bundle 110 passes through each hollow fiber membrane toward the other end of the hollow fiber membrane bundle 110, and moisture in the compressed air selectively passes through the hollow fiber membranes. It is dehumidified by being separated to the purge air side that flows outside. The dehumidified air that has been dehumidified after passing through each hollow fiber membrane is collected in the collecting chamber 102a and discharged from the dehumidified air discharge unit 102.

Part of the dehumidified air collected in the collecting chamber 102a flows into the purge air supply path 116 via the process valve 112 and the first orifice 114 opened in the inner wall surface of the collecting chamber 102a shown in FIG.
The dehumidified air that has flowed into the purge air supply passage 116 flows between the central passage 106 and the cylinder 109 through a vent hole 118 a formed in the upper portion of the cylinder 109, and flows down each hollow fiber membrane of the hollow fiber membrane bundle 110. Thus, the air is discharged to the outside through the vent hole 118 b formed in the lower portion of the cylinder 109 and the vent hole 120 formed in the cylindrical container 104.

As shown in FIG. 12, the process valve 112 is provided with a piston 202 that slides up and down in contact with the inner wall surface of the casing 200, and a valve body 206 is provided at the other end of the piston 202. A midway portion of the shaft 204 passes through a partition portion 212 that partitions the casing 200.
The piston 202 shown in FIG. 12 is pressed by the spring 210 in the direction in which the end face of the valve body 206 comes into contact with the valve seat 208. Dehumidified air is supplied from the dehumidified air discharge unit 102 via the pipes 214 and 216 to the space 211 into which the spring 210 is inserted and the space 207 into which the valve body 206 is inserted.
In addition, compressed air is supplied from the compressed air supply unit 100 via the pipe 218 to the space 205 surrounded by the piston 202 and the partition unit 212.
When a gap is formed between the valve body 206 and the valve seat 208, the dehumidified air in the space 207 flows into the purge air supply path 116 via the pipe 220.

10 to 12, when the dehumidified air is not used, the pressure of the space 205 of the process valve 112 to which the compressed air of the compressed air supply unit 100 is supplied and the dehumidified air are used. Since the pressure difference between the pressure of the space portion 211 of the process valve 112 to which the dehumidified air of the discharge unit 102 is supplied is zero or extremely small, the valve body 206 comes into contact with the valve seat 208 by the elastic force of the spring 210, It is prevented from flowing into the purge air supply path 116 via the pipe 220.
However, the dehumidified air flows into the purge air supply passage 116 via the first orifice 114 that opens to the inner wall surface of the collecting chamber 102a, and the outer peripheral surface of each hollow fiber membrane of the hollow fiber membrane bundle 110 and the vicinity thereof. It is kept dry.
On the other hand, when using dehumidified air, the difference between the pressure of the space part 205 to which the compressed air of the compressed air supply part 100 is supplied and the pressure of the space part 211 to which the dehumidified air of the dehumidified air discharge part 102 is supplied. The pressure becomes larger than the elastic force of the spring 210, and pushes up the piston 202 upward.
For this reason, a gap is formed between the valve body 206 and the valve seat 208, and the dehumidified air supplied to the space portion 207 via the pipe 216 flows into the purge air supply path 116.
JP 2001-232137 A ([0018] to [0023])

According to the hollow fiber membrane dryer apparatus shown in FIGS. 10 to 12, during a pause without using dehumidified air, the amount of purge air flowing along the outer peripheral surface of each hollow fiber membrane of the hollow fiber membrane bundle 110 is reduced. The amount of dehumidified air flowing into the purge air supply passage 116 via the first orifice 114 opened in the inner wall surface of the 102a can be reduced. For this reason, it is possible to prevent an unnecessarily large amount of purge air from flowing.
However, even in this hollow fiber membrane dryer apparatus, purge air is still flowing while the operation is stopped, and dehumidified air is wasted.
The pressure of the dehumidified air supplied to the space 207 is applied to the upper surface side of the valve body 206, but the lower surface side of the valve body 206 is connected to the purge air supply path 116 via the pipe 220. Therefore, the pressure on the lower surface side of the valve body 206 is equal to the atmospheric pressure. In this manner, the pressure of dehumidified air is applied to the valve body 206 in the direction in contact with the valve seat 208 in addition to the elastic force of the spring 210, and a gap is formed between the valve body 206 and the valve seat 208. In order to form this, it is necessary to apply a large force in the opposite direction to the force applied to the valve body 206 in the direction in which the valve seat 208 abuts.
Furthermore, it is necessary to seal between the piston 202 and the inner wall surface of the casing 200, and between the through hole penetrating the partition portion 212 and the shaft 204 inserted into the through hole. It is difficult to be.
Accordingly, an object of the present invention is to provide a hollow fiber membrane dryer apparatus that can stop the supply of purge air while the operation is stopped and can immediately supply the purge air when the operation is resumed.

As a result of repeated studies to solve the above problems, the present inventors can easily stop the supply of dehumidified air to the purge air supply path by using an elastic film made of an elastic material such as rubber. And reached the present invention.
That is, the present invention includes a compressed air supply unit that supplies compressed air to one end of the hollow fiber bundle, in a case of housing a hollow fiber bundle that is bundled and bundled with a plurality of hollow fiber membranes, A compressed air supplied to one end of the hollow fiber focusing body flows through the hollow fiber membrane to be dehumidified, and a dehumidified air discharge unit that collects and discharges the dehumidified air flowing out from the other end of the hollow fiber focusing body is provided. And a purge air supply section formed with a purge air supply passage for supplying purge air for flowing a part of the dehumidified air along the outer peripheral surface of the hollow fiber membrane. The supply portion is provided with a supply stop portion for stopping supply of dehumidified air to the purge air supply passage, and the supply stop portion includes a first portion separating the compressed air supply portion side and the dehumidified air discharge portion side. The elastic membrane and the dehumidified air discharge part side are first A second elastic film provided at a predetermined interval from the conductive film, and a contact member provided on the first elastic film side and having the purge air supply path opened at an end surface thereof in close contact with the second elastic film; A shaft member having the other end attached to the first elastic membrane so that one end abuts against the second elastic membrane, and the pressure of the compressed air supplied from the compressed air supply unit is discharged from the dehumidified air. When the pressure becomes higher than the pressure of the dehumidified air of the part, the dehumidified air discharge part is pressed in the direction of the dehumidified air discharge part so that a part of the dehumidified air of the dehumidified air discharge part flows into the purge air supply path The hollow fiber membrane dryer apparatus is characterized in that the second elastic membrane is pressed in the direction in which the purge air supply path is opened by one end of a shaft member attached to the first elastic membrane.

In the present invention, the close contact member having the purge air supply passage opened is a partition member that partitions the dehumidified air discharge portion, and a communication hole that communicates both the space portions partitioned by the partition member is formed, and the partition member A dehumidified air passage hole is formed in the partition member so that the dehumidified air in the space formed between the partition member and the first elastic film flows into the opening of the purge air supply path formed on the end surface of the partition member. By forming, the supply of dehumidified air to the purge air supply passage can be stopped more easily.
The dehumidified air passage hole also serves as an insertion hole through which the shaft member is inserted, whereby the structure of the hollow fiber membrane dryer device can be simplified.
In addition, a hollow fiber membrane concentrator formed in a U shape is used as the hollow fiber membrane concentrator, and the compressed air supply unit and the dehumidified air discharge unit are arranged in a straight line, thereby facilitating the supply / stop unit. Can be installed.

  According to the hollow fiber membrane dryer apparatus of the present invention, the dehumidified air discharged from the dehumidified air discharge unit is used for various purposes during the operation, and the pressure of the dehumidified air in the dehumidified air discharge unit is supplied with compressed air. The pressure is lower than the pressure of the compressed air on the part side. For this reason, the first elastic film is pressed by the compressed air toward the dehumidified air discharge part and protrudes, and the other end of the shaft member having one end attached to the first elastic film presses the second elastic film. The second elastic membrane that has been pressed by the other end of the shaft member and covered the opening of the purge air supply path is deformed, the opening of the purge air supply path is opened, and the dehumidified air is purged. Flow into. In this way, the dehumidified air from the purge air supply passage flows as the purge air along the outer peripheral surface of each hollow fiber membrane of the hollow fiber membrane bundle, so that the compressed air flowing inside each hollow fiber membrane can be dehumidified.

On the other hand, when the operation of the hollow fiber membrane dryer device is stopped, the pressure of the dehumidified air at the dehumidified air discharge unit and the pressure of the compressed air at the compressed air supply unit side become the same pressure, and the hollow fiber membrane dryer device is operating. In addition, the protruding portion protruding to the dehumidified air discharge portion side of the first elastic film formed by being pressed by the compressed air is also eliminated. For this reason, the deformation due to the pressing of the second elastic membrane by the other end of the shaft member having one end attached to the first elastic membrane is released, and the opening of the purge air supply path is covered by the second elastic membrane, The dehumidified air can be prevented from flowing into the purge air supply path.
As described above, when the operation of the hollow fiber membrane dryer apparatus is stopped using the first elastic membrane and the second elastic membrane, the dehumidified air can be prevented from flowing into the purge air supply path with a simple structure.
The second elastic film is provided on the dehumidified air discharge part side separated from the compressed air supply part by the first elastic film, and both surfaces of the second elastic film are dehumidified air having the same pressure. The second elastic film can be easily deformed by applying a force against the elastic force of the elastic film, and the deformation of the second elastic film can be easily eliminated by releasing this force. For this reason, when the operation of the hollow fiber membrane dryer apparatus is stopped or restarted, the inflow of dehumidified air into the purge air supply path can be immediately stopped or restarted.
Furthermore, in the hollow fiber membrane dryer apparatus according to the present invention, no member whose outer peripheral surface slides on the inner wall surface can be easily sealed.
As a result, the hollow fiber membrane dryer apparatus according to the present invention is suitable for applications where the frequency of suspension of operation and resumption of operation is high, for example, a hollow fiber membrane dryer apparatus used for opening and closing a vehicle door.

An example of the hollow fiber membrane dryer apparatus according to the present invention is shown in FIG. In the hollow fiber membrane dryer apparatus shown in FIG. 1, a U-shaped inner case 12 that is partially formed in a bellows shape is accommodated in a case 10, and a plurality of hollow fiber membranes are bundled in the inner case 12. The hollow fiber membrane converging body 14 that has been converged is accommodated.
One end of the hollow fiber membrane focusing body 14 faces a compressed air supply chamber 18 connected to a compressed air supply port 16 constituting a compressed air supply unit, and the other end of the hollow fiber membrane focusing body 14 is dehumidified air. It faces the dehumidified air discharge chamber 22 connected to the dehumidified air discharge port 20 constituting the discharge unit.
The compressed air supply unit composed of the compressed air supply port 16 and the compressed air supply chamber 18 and the dehumidified air discharge unit composed of the dehumidified air discharge port 20 and the dehumidified air discharge chamber 22 are arranged linearly. .

Also, in the vicinity of the central portion of the case 10 that houses the inner case 12, purge air that flows along the outer peripheral surface of each hollow fiber membrane of the hollow fiber membrane focusing body 14 accommodated in the inner case 12 is contained in the inner case 12. A purge air supply section having a purge air supply passage 24 for supplying to the air is provided. The purge air supply unit is also provided with a supply stop unit 26 that stops supplying dehumidified air to the purge air supply path 24.
The supply stop unit 26 is disposed outside the compressed air supply chamber 18 and the dehumidified air discharge chamber 22 and is connected to the compressed air supply chamber 18 by a flow path 28 as shown in FIG. The compressed air chamber 30 and a dehumidified air chamber 34 connected to the dehumidified air discharge chamber 22 by a flow path 32 are separated by a first elastic film 36.
The dehumidified air chamber 34 is provided with a second elastic film 38 at a predetermined interval from the first elastic film 36, and the purge air supply path 24 is provided on the first elastic film side of the second elastic film 38. A partition member 40 is formed in which a purge air supply connection portion 24a connected to is formed.
A purge air supply connecting portion 24a is opened at an end surface of the partition member 40 where the second elastic film 38 is in close contact. An orifice 24 b is provided at the boundary between the purge air supply connection 24 a and the purge air supply path 24.
The first elastic film 36 and the second elastic film 38 shown in FIGS. 1 and 2 are made of rubber such as silicone rubber or natural rubber, or an elastomer made of a polymer. In addition, a metal diaphragm or bellows may be used as the first elastic film 36 and the second elastic film 38, but it is preferable to cover a portion in contact with the opening of the purge air supply connection portion 24a with an elastic material.

In the supply / stop portion 26 shown in FIG. 2A, the dehumidified air chamber 34 is divided into the space portions 34a and 34b by the partition member 40 and the second elastic film 38. However, the dehumidification that communicates the space portions 34a and 34b. An air passage hole 42 is formed in the partition member 40 and the second elastic film 38. For this reason, the spaces 34 a and 34 b have the same pressure, and a force due to the pressure difference between the spaces 34 a and 34 b is not applied to the second elastic film 38.
A shaft member 44 having the other end attached to the first elastic membrane 36 is inserted into an insertion hole 46 formed in the partition member 40 so that one end thereof contacts the second elastic membrane 38. One end portion of the shaft member 44 that contacts the second elastic film 38 is formed in a spherical shape, and when the one end portion of the shaft member 44 contacts the second elastic film 38, the second elastic film 38 is damaged. Can be prevented.
Further, as will be described later, the insertion hole 46 is pressed at one end of the shaft member 44 to deform the second elastic film 38, and the opening of the purge air supply connecting portion 24a formed in the partition member 40 is opened. In this case, the dehumidified air flowing from the opening of the purge air supply connection portion 24a is also a dehumidified air passage hole that flows from the space portion 34a in a state where the shaft member 44 is inserted.
2A is provided with an indicator section 50 in which an indicator whose color changes with humidity is provided in the transparent cap, and the dehumidified air chamber 34 is provided in the transparent cap. The passages 50a and 50a are formed so that the dehumidified air in the space 34b can flow in.

When the operation of the hollow fiber membrane dryer apparatus shown in FIG. 1 is stopped, since the dehumidified air is not used, the pressures of the compressed air supply chamber 18 and the dehumidified air discharge chamber 22 become equal, and FIG. The pressures of the compressed air chamber 30 connected to the compressed air supply chamber 18 shown in a) and the dehumidified air chamber 34 connected to the dehumidified air discharge chamber 22 are also equal.
Therefore, since the first elastic film 36 separating the compressed air chamber 30 and the dehumidified air discharge chamber 22 is a flat film, the tip of the shaft member 44 with the other end attached to the first elastic film 36 is The abutting second elastic film 38 cannot be pressed and deformed.
For this reason, as shown in FIG. 2A, the second elastic film 38 is in close contact with the end surface of the partition member 40 having the purge air supply connection portion 24a opened, and covers the opening of the purge air supply connection portion 24a. The dehumidified air is prevented from flowing into the purge air supply connection portion 24a.

On the other hand, when the use of the dehumidified air is resumed and the operation of the hollow fiber membrane dryer apparatus is resumed, the pressure of the dehumidified air discharge chamber 22 becomes lower than that of the compressed air supply chamber 18, and therefore, as shown in FIG. Similarly, the first elastic film 36 is pressed toward the dehumidified air chamber 34 by the compressed air pressure of the compressed air chamber 30. The second elastic film 38 is pressed and deformed by one end of the shaft member 44 with the other end attached to the first elastic film 36, and as shown in FIG. The opening of the air supply connection 24a is opened.
In this way, when the opening of the purge air supply connection 24a is opened, the dehumidified air in the space 34a passes through the insertion hole 46 through which the shaft member 44 is inserted and flows into the purge air supply connection 24a. Then, the gas passes through the orifice 24b and is supplied to the purge air supply path 24.
The dehumidified air supplied to the purge air supply path 24 becomes purge air that flows along the outer peripheral surface of each hollow fiber membrane of the hollow fiber membrane bundle 14 accommodated in the inner case 12, and the absorbed purge air is the inner air. It is discharged out of the system via the discharge port 15 of the case 12 and the discharge port 17 of the case 10.

In the hollow fiber membrane dryer apparatus equipped with the supply / stop portion 26 shown in FIGS. 1 to 3, when the operation is stopped, the opening of the purge air supply connection portion 24a is covered with the second elastic membrane 38, and the purge The inflow of dehumidified air to the air supply connection portion 24a can be prevented. For this reason, it is possible to prevent purge air from flowing along the outer peripheral surface of each hollow fiber membrane of the hollow fiber membrane focusing body 14 even when the operation of the hollow fiber membrane dryer apparatus is stopped, which is economically advantageous. .
Further, when the operation of the hollow fiber membrane dryer apparatus is resumed, the supply of purge air can be resumed quickly, so that dehumidified air having a predetermined dew point can be supplied from the hollow fiber membrane dryer apparatus.
Further, the supply stop unit 26 does not use a sliding contact member that is in sliding contact with the inner wall surface of the casing, and can easily seal the constituent members.

  The shaft member 44 used in the supply / stop portion 26 shown in FIGS. 1 to 3 has one end that presses the second elastic film 38 having a larger diameter than the main body diameter of the shaft member 44 and contacts the second elastic film 38. The abutting contact surface side is formed in a piston portion 44a formed in a spherical surface. For this reason, even if the pressure difference between the compressed air supply chamber 18 and the dehumidified air discharge chamber 22 is small, the second elastic film 38 can be pressed. On the other hand, as shown in FIG. 4, the piston 44 a is formed in a columnar shape, and the contact surface that contacts the second elastic film 38 is formed as a flat surface, thereby reducing the area for pressing the second elastic film 38. The force that presses the second elastic film 38 can be dispersed. For this reason, the damage of the part pressed by the piston part 44a of the 2nd elastic film 38 can be prevented.

Further, as shown in FIG. 3, an accommodation recess 46 a that accommodates a piston portion 44 a formed at one end of the shaft member 44 is formed at the opening of the insertion hole 46, and the end surface where the accommodation recess 46 a is opened. 5a may be a flat surface as shown in FIG. 5 (a), and when the second elastic film 38 comes into close contact with the end surface of the partition member 40 as shown in FIG. Therefore, the annular protrusion 47 may be formed so as to surround the accommodation recess 46a.
Further, as shown in FIG. 5 (b), the surface surrounding the housing recess 46a is inclined outwardly from the peripheral edge of the opening as shown in FIG. 5 (c). You may form in the reverse taper surface 51 to do. By forming the surface surrounding the housing recess 46 a on the tapered surface 49 or the reverse tapered surface 51, the sealing performance can be improved when the second elastic film 38 comes into close contact with the end surface of the partition member 40.

When the pressing portion of the second elastic film 38 pressed by the piston portion 44a formed at one end portion of the shaft member 44 is easily damaged, the pressing portion may be replaced with another as shown in FIGS. 6 (a) and 6 (b). The strength may be improved by making the thick portion 38b thicker than this portion. In this case, the thick portion 38b may be sized to be accommodated in the accommodating recess 46a as shown in FIG. 6 (a), and accommodated in the accommodating recess 46a as shown in FIG. 6 (b). You may make it the size which is not done.
In addition, the opening shape that opens to the end surface of the partition member 40 of the purge air supply connection portion 24a may be a circular or elliptical shape, depending on the degree of adhesion of the second elastic film 38 to the end surface of the partition member 40, It is good also as a shape which can adjust the amount of dehumidification air which flows into the purge air supply connection part 24a. As the opening shape of the purge air supply connection portion 24a, for example, a triangular shape shown in FIG. 7A, a rectangular shape shown in FIG. 7B, and a plurality of circles shown in FIG. The shape can be raised.

In the hollow fiber membrane dryer device shown in FIGS. 1 to 7, the supply stop unit 26 is disposed outside the compressed air supply chamber 18 and the dehumidified air discharge chamber 22, but the compressed air supply chamber 18 and the dehumidified air discharge FIG. 8 shows a hollow fiber membrane dryer apparatus in which a supply / stop portion 26 is disposed inside the boundary with the chamber 22.
The hollow fiber membrane dryer apparatus shown in FIG. 8 is the same as the hollow fiber membrane shown in FIGS. 1 to 7 except that the supply stop portion 26 is disposed inside the boundary portion between the compressed air supply chamber 18 and the dehumidified air discharge chamber 22. It is formed by the same member as the membrane dryer apparatus.
For this reason, about the structural member of the hollow fiber membrane dryer apparatus shown in FIG. 8, about the same member as the hollow fiber membrane dryer apparatus shown in FIGS. 1-7, the same number is attached | subjected and detailed description is abbreviate | omitted.
Moreover, in the hollow fiber membrane dryer apparatus shown in FIGS. 1-8, although the hollow fiber membrane focusing body 14 was bent in U shape, the hollow fiber membrane focusing body 14 was arrange | positioned in the case 10 linearly. A hollow fiber membrane dryer apparatus is shown in FIG.
Also for the hollow fiber membrane dryer apparatus shown in FIG. 9, the same members as those in the hollow fiber membrane dryer apparatus shown in FIGS.
In the hollow fiber membrane dryer apparatus shown in FIG. 9, since the supply stop unit 26 is disposed outside the dehumidified air discharge chamber 22, a space between the compressed air supply chamber 18 and the compressed air chamber 30 of the supply stop unit 26 is provided. Except for being connected by the pipe 29, the hollow fiber membrane dryer apparatus shown in FIGS.

It is sectional drawing which shows an example of the hollow fiber membrane dryer apparatus which concerns on this invention. FIG. 2 is an enlarged cross-sectional view of a feed stop unit 26 shown in FIG. It is a fragmentary sectional view explaining the end surface shape of the partition member 40 shown in FIG. It is a partial front view which shows the other example of the shaft member 44 shown in FIG. It is a fragmentary sectional view which shows another example about the end surface shape of the partition member 40 shown in FIG. FIG. 6 is a partial cross-sectional view illustrating another example of the second elastic film 38 illustrated in FIG. 2. It is a front view which shows another example about the opening shape of the purge air supply connection part 24a formed in the end surface of the partition member 40 shown in FIG. It is sectional drawing which shows the other example of the hollow fiber membrane dryer apparatus which concerns on this invention. It is sectional drawing which shows the other example of the hollow fiber membrane dryer apparatus which concerns on this invention. It is sectional drawing which shows the conventional hollow fiber membrane dryer apparatus. It is a partial expanded sectional view of the hollow fiber membrane dryer apparatus shown in FIG. It is explanatory drawing explaining the structure of the process valve 112 provided in the conventional hollow fiber membrane dryer apparatus.

Explanation of symbols

10 Case 12 Inner Case 14 Hollow Fiber Membrane Converged Body 16 Compressed Air Supply Port 18 Compressed Air Supply Chamber 20 Dehumidified Air Discharge Port 22 Dehumidified Air Discharge Chamber 24b Orifice 24a Purge Air Supply Connection Portion 24 Purge Air Supply Path 26 Supply Stop Portion 30 Compression Air chambers 34a, 34b Space 34 Dehumidified air chamber 36 First elastic membrane 38 Second elastic membrane 38b Thick portion 40 Partition member 42 Dehumidified air passage hole 44a Piston portion 44 Shaft member 46a Receiving recess 46 Insertion hole 47 Annular projection 49 Taper Surface 51 Reverse taper surface

Claims (4)

A case that accommodates a bundle of hollow fiber membranes bundled and bundled with a plurality of hollow fiber membranes; a compressed air supply unit that supplies compressed air to one end of the hollow fiber bundle; and one end of the hollow fiber bundle And a dehumidified air discharge unit that collects and discharges the dehumidified air that flows out from the other end of the hollow fiber bundle, and is supplied to the dehumidified air. In a hollow fiber membrane dryer apparatus comprising a purge air supply section formed with a purge air supply path for supplying a purge air that partially flows along the outer peripheral surface of the hollow fiber membrane,
The purge air supply unit is provided with a supply stop unit that stops supplying dehumidified air to the purge air supply path,
The supply stop unit is provided with a first elastic film separating the compressed air supply unit side and the dehumidified air discharge unit side and a predetermined interval from the first elastic film on the dehumidified air discharge unit side. A second elastic film, a close contact member provided on the first elastic film side and having the purge air supply path opened at an end face to which the second elastic film is in close contact, and one end of the second elastic film are in contact with each other A shaft member having the other end attached to the first elastic membrane,
When the pressure of the compressed air in the compressed air supply unit becomes higher than the pressure of the dehumidified air in the dehumidified air discharge unit, a part of the dehumidified air in the dehumidified air discharge unit flows into the purge air supply path The second elastic film is pressed in the direction in which the purge air supply path is opened by one end of a shaft member attached to the first elastic film pressed in the direction toward the dehumidifying air discharge part. A hollow fiber membrane dryer device. The close contact member in which the purge air supply path is opened is a partition member that partitions the dehumidified air discharge part, and a communication hole that connects both the space parts partitioned by the partition member is formed,
The dehumidified air flows into the partition member so that the dehumidified air in the space formed between the partition member and the first elastic membrane flows into the opening of the purge air supply path formed on the end surface of the partition member. The hollow fiber membrane dryer apparatus according to claim 1, wherein a passage hole is formed.   The hollow fiber membrane dryer apparatus according to claim 2, wherein the dehumidified air inflow hole also serves as an insertion hole through which the shaft member is inserted.   The hollow fiber membrane focusing body is a hollow fiber membrane focusing body formed in a U-shape, and the compressed air supply section and the dehumidified air discharge section are arranged in a straight line. The hollow fiber membrane dryer apparatus according to one item.

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