KR102447771B1 - Humidifier for fuel cell - Google Patents

Abstract

Disclosed is a humidifier for a fuel cell, wherein water introduced into a housing through a water supply member is formed into wet air with excellent atomization performance while coming in contact with the blades of an atomization fan freely rotated by compressed air and can be discharged through a wet air discharge unit, particularly, a separate power source for atomization of water is unnecessary, the humidifier can be installed in an existing air duct to make a separate space unnecessary, and manufacturing costs can be significantly reduced.

Description

Humidifier for fuel cell

According to the present invention, water introduced into the housing through the water supply member is formed into wet air having excellent atomization performance while in contact with the blades of the atomization fan freely rotated by compressed air, so that it can be discharged through the wet air discharge unit. It relates to a fuel cell humidifier that does not require a separate power for water atomization, so there is no power consumption, and since it can be installed in an existing air pipe, there is no need to allocate a separate space, and the manufacturing cost can be significantly reduced.

A fuel cell is a power generation type cell that produces electricity by combining hydrogen and oxygen. Unlike general chemical cells such as dry cells and storage batteries, fuel cells can continuously produce electricity as long as hydrogen and oxygen are supplied, and there is no heat loss, so the efficiency is about twice that of an internal combustion engine.

In addition, since the chemical energy generated by the combination of hydrogen and oxygen is directly converted into electrical energy, the emission of pollutants is low. Accordingly, the fuel cell has the advantage of being environmentally friendly and reducing concerns about resource depletion due to increased energy consumption.

Accordingly, a fuel cell system capable of continuously producing electric energy through a chemical reaction of continuously supplied fuel is continuously researched and developed as an alternative to solve the global environmental problem.

Depending on the type of electrolyte used, the fuel cell system includes a phosphoric acid fuel cell (PAFC), a molten carbonate fuel cell (MCFC), and a solid oxide fuel cell (SOFC). ), polymer electrolyte membrane fuel cell (PEMFC), alkaline fuel cell (AFC), direct methanol fuel cell (DMFC), etc. Depending on the operating temperature, output range, etc., it can be applied to various application fields such as mobile power supply, transportation, and distributed power generation.

Although each of these fuel cells operates based on the same principle, the type of fuel used, operating temperature, catalyst, electrolyte, etc. are different from each other.

Among them, the polymer electrolyte fuel cell is known to be the most promising not only for small-scale stationary power generation equipment but also for transportation systems because it operates at a lower temperature compared to other fuel cells and because of its high power density and compactness. It is being applied to the field of hydrogen vehicles (hydrogen fuel cell vehicles) being developed to do this.

One of the most important factors in improving the performance of a polymer electrolyte fuel cell is supplying a certain amount of moisture to the polymer electrolyte membrane (Polymer Electrolyte Membrane or Proton Exchange Membrane: PEM) of the membrane-electrode assembly (MEA). This is to maintain the moisture content. This is because when the polymer electrolyte membrane is dried, the power generation efficiency is rapidly reduced. Accordingly, a humidifying device for adequately humidifying the fuel (hydrogen) supply side and the air supply side must be provided so that the electrolyte membrane of the membrane electrode assembly can be maintained at a certain humidity or higher.

Among the conventional humidifiers for fuel cells, a humidifier for fuel cells using a pressurized pump and an injector is expensive, has many components, and has a high risk of failure because a pump that generates high pressure and an injector with a precise structure are essential. In addition, there is a problem that an additional power unit and a control device are required to drive the pump, nozzle clogging may occur due to impurities in the water, and the high-pressure pump needs to maintain its performance.

Next, the gas to gas membrane humidifier is relatively simple in principle because it has no moving parts, but it requires a complex shape to widen the contact area, its size becomes large, and the price of the humidifying membrane is too high When excessive humidification occurs in the membrane humidifier, flooding may occur by the condensed water generated thereby, which causes local cathode starvation, which in turn accelerates the deterioration of the fuel cell catalyst. There is a fatal problem that reduces the durability of the fuel cell.

Next, the "air supply device including a humidifier for fuel cells" of Korean Patent No. 10-0911590 is sprayed into the air passing through the impeller while water is crushed in the process of passing through the micro-holes to humidify the air. , configured such that this humidified air is supplied to the stack past the outlet of the housing.

However, in the air supply device, some of the moisture that has passed through the micro-holes may remain on the upper surface of the flat slinger nozzle, and the residual moisture may flow back to the circuit side of the motor to damage the motor.

In addition, the amount of water particles atomized by passing through the micro-holes is inevitably small compared to the amount of water injected into the micro-holes, and the size of the water particles passing through the micro-holes is inevitably large. However, the larger the water particle, the higher the possibility of recombination by manpower and the difficulty in mixing with air is also fatal.

The present invention was invented to solve the above problems, and it does not require a separate power device for atomization of water injected into the humidifier, and thus there is no power consumption, and can be installed in an existing air pipe. An object of the present invention is to provide a humidifier for a fuel cell that does not need to occupy a space and can significantly reduce the manufacturing cost.

For the above purpose, in the present invention, in a humidifier for a fuel cell, one end is made of a compressed air inlet connected in communication with an external compressed air supply device, and the other end is made of a wet air outlet through which the wet air is discharged. a cylindrical housing in which both ends are formed in a longitudinal direction with hollow wet air forming portions connected in communication with the compressed air inlet and the wet air outlet, respectively; a rotating shaft disposed along the longitudinal direction in the center of the inside of the wet air forming part; Doedoe disposed between the compressed air inlet and the wet air forming part, a water supply nipple connected in communication with an external fuel cell stack is connected in communication with one side of the outer circumferential surface, and a water supply hole communicating with the wet air forming part is on one side a water supply member that is formed through and injects water generated in a redox reaction between hydrogen and oxygen of the fuel cell stack into the wet air forming unit; A plurality of blade central shafts coupled to the outer peripheral surface of the rotation shaft and a plurality of blades are arranged in a radial direction from the outer peripheral surface of the central shaft and rotated together with the rotation shaft by compressed air injected through the compressed air inlet, and wet air through the water supply hole It characterized in that it comprises a; atomization fan consisting of a blade that forms the water injected into the forming part into atomized air bubbles.

In addition, the present invention is disposed between the compressed air inlet and the wet air forming part in the inside of the housing, and a first rotation shaft support part supporting one end of the rotation shaft, and a side surface of the first rotation shaft support part along a radial direction A plurality of first fixing pieces formed to extend and coupled to the inner circumferential surface of the housing to fix the first rotating shaft support part, are disposed inside the housing between the wet air forming part and the wet air discharge part, and the other end of the rotating shaft A second rotation shaft support for supporting the, and a plurality of second fixing pieces extending in the radial direction from the side outer peripheral surface of the second rotation shaft support part and coupled to the inner peripheral surface of the housing to fix the second rotation shaft support part, The water supply member, in the form of a ring having a flow path formed therein, is coupled to surround the outer circumferential surface of the housing at a height corresponding to the first rotation shaft support part, and water flows into the internal flow path through the water supply nipple as a medium. A water supply housing to be introduced, and a water supply pipe inserted into each of the first fixing pieces, one end of which is connected in communication with the flow path inside the water supply housing, and the water supply hole is formed through the bottom surface, the water supply hole comprising: It is formed through the bottom surface of the first fixing piece so that the water introduced into the water supply pipe is introduced into the wet air forming part, and a vacuum shape is generated around the water supply hole by the compressed air moving rapidly along the wet air forming part. It is characterized in that after primary atomization of the water discharged through the water supply hole is made, it is in contact with the atomization fan to form moist air with excellent atomization performance through secondary atomization.

In addition, in the present invention, the first rotating shaft support portion is characterized in that a buffer member into which an elastic spring is interpolated is mounted so that a buffer action is made against the force applied from the rotation shaft to the first rotation shaft support portion depending on whether compressed air is input. .

In addition, in the present invention, a plurality of atomization fans are provided on the rotation shaft at regular intervals, and the blades of one atomization fan and the blades of the other atomization fan adjacent to each other are arranged in a staggered form so that the wet air is continuously plural when moving toward the humid air outlet. It is characterized in that it is made to come into contact with the blade of the dog so that it can be maintained in an atomized state without being recombined by manpower.

In addition, the present invention is characterized in that it includes a flow rate control valve for controlling the amount of water supplied to the water supply member so that the output performance of the fuel cell stack can be controlled through a change in the amount of humidification according to the amount of water supplied.

According to the present invention as described above, water introduced into the housing through the water supply member comes into contact with the blades of the atomization fan rotated by compressed air, and is formed as wet air having excellent atomization performance and discharged through the wet air discharge unit. The performance of the fuel cell can be improved by supplying the moist air having excellent atomization performance to the fuel cell stack.

In addition, the water emitted from the fuel cell generates heat due to a chemical reaction within the fuel cell, and the vaporization phenomenon that occurs while in contact with the blade has an effect of lowering the temperature of the water.

In addition, in the present invention, since the humidifier can be installed in the existing air conduit to which compressed air is supplied, there is no need to set aside a separate installation space for the humidifier, and the blades of the atomizing fan freely rotating through the compressed air come into contact with water. Since it can be formed with moist air with excellent atomization performance, a separate power device for atomization of water can be omitted, thereby reducing the manufacturing cost, and economical benefits can be obtained because power consumption is not generated. In addition, there is an advantage that the manufacturing cost is very low compared to the existing humidifier using a polymer plastic.

In addition, in the present invention, after primary atomization of water discharged through the water supply hole in which a vacuum is generated around due to the compressed air moving along the inside of the wet air forming part is made, and then it is atomized as it collides with the atomization fan, it is atomized. It is possible to provide moist air with excellent performance.

In addition, depending on whether compressed air is input through the buffer member provided in the first rotation shaft support part, a buffer action is made for the force applied to the first rotation shaft support part from the rotation shaft, and the durability of the rotation shaft due to wear can be reduced. .

In the present invention, a plurality of atomizing fans are provided on the rotation shaft at regular intervals, and the blades of one atomization fan and the blades of the other atomization fan adjacent to each other are arranged in a staggered form so that the wet air is continuously plural when moving toward the humid air outlet. It can be made to come into contact with the blade of the dog so that it can be maintained in an atomized state without being recombined by manpower. Accordingly, it is possible to provide wet air having remarkably excellent atomization performance.

In addition, the present invention can control the amount of water injected by the fan inside the housing through the flow control valve in real time, so that the adjustment of the humidification amount according to the water supply amount adjustment can be immediately reacted to control the output performance of the fuel cell stack. more efficient

1 to 3 are schematic exemplary views showing a humidifier for a fuel cell according to the present invention.
4 is an operational state diagram of a humidifier for a fuel cell according to the present invention.
Figures 5a and 5b is a schematic illustration showing a general compressed air supply.
6 is an exemplary view schematically illustrating a process in which moist air is supplied to a fuel cell stack through a humidifier according to an embodiment of the present invention.

Hereinafter, a humidifier for a fuel cell according to the present invention will be described in more detail with reference to the accompanying drawings.

The present invention discloses a humidifier for a hydrogen fuel cell stack.

A hydrogen fuel cell stack is a core part of a hydrogen vehicle that can produce electricity through redox reaction between fuel (eg, hydrogen) and an oxidizing agent (eg, air).

This fuel cell stack is a membrane electrode assembly (MEA) (not shown) to which an electrochemical reaction occurs on both sides of the membrane around an electrolyte membrane through which hydrogen ions move, evenly distributing reactive gases and generating Gas Diffusion Layer (GDL) (not shown) performing a role of transferring electrical energy, gaskets and fasteners (not shown) to maintain airtightness and proper clamping pressure of reactive gases and cooling water, and reactive gas and a bipolar plate (not shown) for moving the cooling water.

In addition, in the fuel cell stack, hydrogen as a fuel and air (oxygen) as an oxidizing agent are supplied to the anode and cathode of the membrane electrode assembly through the flow path of the separator, respectively. Hydrogen is supplied to the anode, and the air is supplied to the cathode.

At this time, the hydrogen supplied to the anode is decomposed into hydrogen ions (protons) and electrons (protons) by the catalyst of the electrode layers configured on both sides of the electrolyte membrane, and only hydrogen ions are selectively transferred to the cathode through the electrolyte membrane, which is a cation exchange membrane. At the same time, electrons are transferred to the cathode through the gas diffusion layer and the separator, which are conductors.

At the cathode, hydrogen ions supplied through the electrolyte membrane and electrons transferred through the separator meet with oxygen in the air supplied to the cathode by an air supply device to generate water. Due to the movement of hydrogen ions occurring at this time, the flow of electrons through the external conductor occurs, and a current is generated by the flow of these electrons.

The humidifier for a hydrogen fuel cell stack is a device that supplies humidified air to the fuel cell stack to maintain the electrolyte membrane of the membrane electrode assembly at a certain humidity or higher to promote the movement of electrons.

1 to 3 are schematic exemplification views illustrating a humidifier for a fuel cell according to the present invention, and FIG. 4 is an operational state diagram of the humidifier for a fuel cell according to the present invention.

1 to 3, first, in the humidifier for fuel cell according to the present invention, a housing 110 having a hollow structure having a cylindrical shape is provided.

One end of the housing 110 is made of a compressed air inlet 111 connected in communication with a compressed air supply device provided separately outside, and the other end is made of a wet air outlet 112 through which the wet air is discharged. Further, inside the housing 110, both ends are formed along the longitudinal direction of the hollow moist air forming portion 113 is connected in communication with the compressed air inlet and the wet air outlet, respectively.

Here, the wet air outlet 112 is connected in communication with the fuel cell stack to supply the wet air formed in the wet air forming part 113 to the fuel cell stack.

In addition, the humidifier according to the present invention includes a rotation shaft 120 installed inside the wet air forming part 113 , a water supply member 130 for introducing water into the wet air forming part, and the water supply member It includes an atomization fan 140 that forms the water input from the atomized air bubbles.

The rotating shaft 120 is fixedly installed along the longitudinal direction in the inner center of the wet air forming part.

2 and 3 are schematic diagrams for explaining the principle in which the rotating shaft 120 is fixed inside the wet air forming part 113 according to an embodiment of the present invention.

First, as shown in FIG. 2 , between the compressed air inlet 111 and the wet air forming part 113 , a first rotation shaft support part 114 for supporting one end of the rotation shaft 120 is formed, and the first rotation shaft A plurality of first fixing pieces 1141 are formed to extend in a radial direction at regular intervals from the outer circumferential surface of the side surface of the support and are coupled to the inner circumferential surface of the housing.

In addition, as shown in FIG. 3 , a second rotation shaft support part 115 for supporting the other end of the rotation shaft is formed between the wet air forming part 113 and the wet air exhaust part 112 , and a side surface of the second rotation shaft support part is formed. A plurality of second fixing pieces 1151 are formed to extend in a radial direction at regular intervals from the outer circumferential surface and are coupled to the inner circumferential surface of the housing.

As shown in FIGS. 2 and 3 , the rotation shaft 120 is fixedly installed inside the wet air forming part 113 by the first rotation shaft support part 114 and the second rotation shaft support part 115 which are in close contact with both ends.

Meanwhile, the compressed air introduced into the housing through the compressed air inlet 111 passes between the first fixing piece 1141 and the first fixing piece 1141 and is introduced into the wet air forming part 113 .

If the gap between the first fixing piece 1141 and the first fixing piece 1141 is narrow, it is not preferable because resistance may be generated during movement of the compressed air and the amount of compressed air input per unit time may be reduced.

Therefore, the first fixing piece 1141 is preferably formed in an appropriate number so as not to interfere with the flow of compressed air, for example, 120 ° from the outer peripheral surface of the side of the first rotating shaft support 114 as shown in FIG. 2 . Three first fixing pieces 1141 may be formed at intervals.

The second fixing piece 1151 is also preferably formed in an appropriate number so that the wet air can smoothly move toward the wet air outlet 112. For example, as shown in FIG. 3, the side surface of the second rotating shaft support 115 Three second fixing pieces 1151 may be formed at intervals of 120° from the outer circumferential surface.

Next, the water supply member 130 is disposed between the compressed air inlet and the wet air forming part, and a water supply nipple connected in communication with an external fuel cell stack is connected to one side of the outer circumferential surface in communication with the wet air. A water supply hole communicating with the air forming unit is formed through one side of the member, so that water generated in a redox reaction between hydrogen and oxygen of the fuel cell stack is introduced into the wet air forming unit.

Referring to FIG. 2 , the water supply member 130 includes a water supply housing 131 and a water supply pipe 132 in which a water supply hole 133 is formed.

The water supply housing 131 is in the form of a ring having a flow path formed therein, and is coupled to surround the outer circumferential surface of the housing at a height corresponding to the first rotation shaft support portion.

In addition, a nipple 1311 for water supply is coupled to one side of the outer circumferential surface of the water supply housing.

Here, one end of the nipple for supplying water 1311 is connected in communication with the flow path inside the water supply housing and the other end is connected in communication with the fuel cell stack in the redox reaction between hydrogen and oxygen of the fuel cell stack. The generated water is introduced into the flow path inside the water supply housing 131 .

The water supply pipe 132 is inserted into each of the first fixing pieces 1141, one end of which is connected in communication with the flow path inside the water supply housing, and a water supply hole 133 is formed in the bottom surface. Here, the water supply hole 133 is formed through to the bottom surface of the first fixing piece so that the water introduced into the water supply pipe is introduced into the wet air forming part.

In the present invention as described above, a vacuum shape is generated around the water supply hole 133 by the compressed air moving rapidly along the wet air forming part 113, and the primary atomization of the water discharged through the water supply hole 133 is achieved. The secondary atomization is performed by the atomization fan 140 which will be described later.

On the other hand, the fuel cell requires an air flow rate proportional thereto in an operation section that requires a large power. In order to humidify such a large amount of air, a large amount of moisture is required. For this, a larger amount of water needs to be sprayed into the housing 110 .

Accordingly, the present invention may include a flow rate control valve 150 for controlling the amount of water supplied to the water supply member so that the output performance of the fuel cell stack can be controlled through a change in the amount of humidification according to the amount of water supplied.

The flow control valve 150 may be installed on the connection pipe between the fuel cell stack and the nipple for water supply, and may expand or reduce the diameter of the duct according to an external signal so that water discharged from the fuel cell stack is supplied with water. It is possible to adjust the amount introduced into the nipple 1311 for use.

To this end, the flow control valve 150 may be a valve structure in which opening and closing are controlled, for example, a solenoid valve structure, and in addition, various embodiments of a structure capable of adjusting the diameter of the duct may be applied.

Next, as shown in FIGS. 1 and 4 , the atomization fan 140 includes a blade central shaft 141 and a blade 142 .

The blade central shaft 141 is coupled to the outer peripheral surface of the rotation shaft 120 is rotated together with the rotation shaft. To this end, the central axis of the blade 141 may be formed in the form of a hollow integrated with the blade.

The blade 142 is freely rotated together with the rotating shaft under the influence of the compressed air injected into the wet air forming unit 113, and in the process of free rotation, it is in direct contact with water through the water supply hole as an atomized air bubble. to form

A plurality of the blades 142 may be arranged in a radial direction from the outer peripheral surface of the central axis of the blade. In addition, the blade 142 may be formed in an appropriate shape (eg, spiral) so that the contact area with the compressed air is secured to generate sufficient rotational force so that the contact with the water can be made more actively.

The atomization fan 140 including the blade central shaft 141 and the blade 142 freely rotates like a pinwheel through the compressed air, and at this time, the water injected into the wet air forming unit is in direct contact with the blade. It forms into atomized air bubbles.

In particular, the present invention forms wet air with remarkably excellent atomization performance because secondary atomization is made by contact with the atomization fan 140 in a state where the primary atomization of water is made by the vacuum generation phenomenon that occurs according to the movement of pressure. This can be achieved, and the effect of improving the performance of the fuel cell can be expected by supplying the moist air having excellent atomization performance to the fuel cell stack. In addition, the water emitted from the fuel cell generates heat due to a chemical reaction within the fuel cell, and the vaporization phenomenon that occurs while in contact with the blade has an effect of lowering the temperature of the water.

On the other hand, it is preferable that the first rotation shaft support part 114 and the second rotation shaft support part 115 are made of a material with minimal frictional resistance to facilitate rotation of the rotation shaft 120 .

Next, a plurality of atomization fans 140 may be provided on the rotation shaft 120 at regular intervals.

In this case, it is preferable that the blades of the atomization fan on one side and the blades of the atomization fan on the other side are arranged in a crossed shape (eg, in a zigzag form).

This allows the wet air formed inside the wet air forming part 113 to continuously contact the plurality of blades in the process of moving toward the wet air outlet 112, so as not to recombine by manpower and to maintain an atomized state. For this purpose, the wet air having excellent atomization performance can be discharged to the wet air discharge unit 112 through this.

Next, FIGS. 5A and 5B are schematic exemplifications illustrating a conventional general compressed air supply device connected in communication with a humidifier for supplying wet air to a fuel cell.

As shown in FIGS. 5A and 5B , the compressed air supply device 200 has a hollow shape with an open rear surface, and an outside air intake unit 211 through which external air is introduced is formed in the front center portion, and the outside air intake portion is orthogonal to one side of the outer circumferential surface. The impeller housing 210 in which the outdoor air discharge part 212 is formed in the direction is provided.

Here, the outdoor air inlet 211 and the outdoor air outlet 212 provide an inflow path and an exhaust path for outside air, and may be formed in the form of a cylindrical duct having a predetermined diameter and length.

The external air introduced through the outdoor air inlet is compressed by the impeller 230 and then discharged to the outside through the outdoor air outlet.

The motor 220 is disposed on the rear surface of the impeller housing, and the impeller 230 is disposed on the same horizontal line as the outside air intake part inside the impeller housing and is rotated by the motor. Push the air toward the wall of the impeller housing so that the air is discharged to the outside air outlet.

The compressed air supply device 200 is configured such that the external air sucked in through the outside air inlet 211 is compressed by an internal impeller 230 and then discharged through the outside air discharge unit 212 on the other side, and the The outdoor air discharge unit 212 is connected in communication with the compressed air inlet 111 of the humidifier according to an embodiment of the present invention to inject compressed air into the housing. Compressed air is introduced into the wet air forming unit 113 to rotate the atomization fan 140 while in contact with the blade 142 .

Here, when the wind pressure by the compressed air in contact with the blade 142 acts on the rotating shaft 120 and the input of the compressed air is stopped, the wind pressure is removed, in this process from one end of the rotating shaft 120 . As an external force is applied to the first rotation shaft support part 114 , the rotation shaft 120 and the first rotation shaft support part 114 collide with each other, and durability may be deteriorated due to friction.

In order to prevent this problem in advance, the first rotating shaft support 114 according to the present invention is equipped with a buffer member 1142 into which an elastic spring 1143 is interpolated. The buffer member 1142 provides a buffering effect of absorbing the external force applied to the first rotation shaft support part 114 from one end of the rotation shaft 120 as an elastic force when the wind pressure is removed while the input of the compressed air is stopped. Through this, it is possible to prevent the durability of the rotating shaft 120 and the first rotating shaft supporting part 114 from being deteriorated.

On the other hand, Figure 2 to help the understanding of the present invention can more clearly understand the shape, structure and coupling relationship of the water supply member 130, the first rotation shaft support 114, and the first fixing piece 1141. The housing 110 is omitted so that.

Above, a specific part of the content of the present invention has been described in detail, for those of ordinary skill in the art, this specific description is only a preferred embodiment, and the scope of the present invention is not limited thereby It will be obvious. Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

100: humidifier
110: housing
111: compressed air inlet
112: humid air outlet
113: wet air forming part
114: first rotation shaft support part
1141: first fixed piece 1141-1: communication part
1142: buffer member
1143: elastic spring
115: second rotation shaft support part
1151: second fixed piece
120: rotation axis
130: water supply member
131: water supply housing
1311: nipple for water supply
132: water pipe
133: water supply hole
140: atomization fan
141: rotation axis
142: blade
150: flow control valve
200: compressed air supply device
210: impeller housing
211: outside air intake
212: outdoor air discharge unit
220: motor
230: impeller

Claims (5)

A humidifier for a fuel cell, comprising:
One end is made of a compressed air inlet 111 connected in communication with an external compressed air supply device, and the other end is made of a wet air outlet 112 through which the wet air is discharged. a cylindrical housing 110 in which a hollow wet air forming part 113 connected in communication with the inlet and the wet air outlet is formed along the longitudinal direction;
a rotation shaft 120 disposed along the longitudinal direction in the center of the inside of the wet air forming part;
It is disposed between the compressed air inlet and the wet air forming part, and a water supply nipple connected in communication with an external fuel cell stack is connected in communication with one side of the outer circumferential surface, and a water supply hole communicating with the wet air forming part is on one side. a water supply member 130 that is formed through and injects water generated in a redox reaction between hydrogen and oxygen of the fuel cell stack into the wet air forming unit;
A plurality of blade central shafts 141 coupled to the outer peripheral surface of the rotating shaft and a plurality of blades are arranged in a radial direction from the outer peripheral surface of the central shaft, and rotated together with the rotating shaft by compressed air introduced through the compressed air inlet, the water supply hole an atomization fan 140 comprising a blade 142 that forms water injected into the wet air forming part through atomized air bubbles;
A humidifier for a fuel cell, characterized in that it comprises a.
According to claim 1,
a first rotating shaft support part disposed between the compressed air inlet and the wet air forming part inside the housing and supporting one end of the rotating shaft;
A plurality of first fixing pieces extending along the radial direction from the outer peripheral surface of the side of the first rotation shaft support portion and coupled to the inner peripheral surface of the housing to fix the first rotation shaft support portion;
a second rotation shaft support part disposed between the wet air forming part and the wet air exhaust part inside the housing and supporting the other end of the rotation shaft;
and a plurality of second fixing pieces extending from the outer peripheral surface of the side surface of the second rotation shaft support part in a radial direction and coupled to the inner peripheral surface of the housing to fix the second rotation shaft support part,
The water supply member,
A water supply housing in the form of a ring having a flow path formed therein, which is coupled to surround the outer circumferential surface of the housing at a height corresponding to the first rotation shaft support part, and into which water is introduced into the internal flow path through the water supply nipple; A water supply pipe inserted into each of the first fixing pieces, one end of which is connected in communication with the flow path inside the water supply housing, and through which the water supply hole is formed in the bottom surface,
The water supply hole is formed through the bottom surface of the first fixing piece so that water introduced into the water supply pipe is introduced into the wet air forming part,
A vacuum shape is generated around the water supply hole by the compressed air moving rapidly along the wet air forming part, and after the primary atomization of water discharged through the water supply hole is made, the atomization performance is excellent by secondary atomization while in contact with the atomization fan A humidifier for a fuel cell, characterized in that it is capable of forming moist air.
The method according to claim 2, wherein the first rotation shaft support part is equipped with a buffer member into which an elastic spring is interpolated so that a buffer action is made against the force applied from the rotation shaft to the first rotation shaft support part depending on whether compressed air is injected. A humidifier for fuel cells.
According to claim 1, wherein a plurality of atomizing fans are provided on the rotating shaft at regular intervals, and the blades of one atomization fan and the blades of the other atomization fan adjacent to each other are arranged so as to be staggered so that the wet air is continuously moved to the humid air outlet side. A humidifier for a fuel cell, characterized in that it is brought into contact with a plurality of blades to maintain an atomized state without being recombined by manpower.
The humidification for fuel cell according to claim 1, further comprising a flow rate control valve for adjusting the amount of water supplied to the water supply member so as to control the output performance of the fuel cell stack through a change in the amount of humidification according to the amount of water supplied. Device.

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