KR20120133458A - A blower cathode use fuel cell - Google Patents

Abstract

PURPOSE: A cathode blower for a fuel cell is provided to minimize the external size of a blower and to reduce noise and power consumption by supplying air by using a diaphragm installed in both of two blower heads. CONSTITUTION: A cathode blower for a fuel cell comprises: an eccentric axis eccentrically connected to an axis of a motor located in a center back part of a blower(10); a first and second eccentric cam rod converting rotational movement to up-and-down movement by being installed on the eccentric axis; a diaphragm(40) installed in the first and second blower heads; and an inlet and outlet respectively formed on the outside of the first and second blower heads respectively in order put air in and out by the operation of the diaphragm; and a disc type check valve controlling input and output of the air.

Description

Cathode blower for fuel cell {A BLOWER CATHODE USE FUEL CELL}

The present invention relates to a cathode blower for supplying air to a fuel cell system for home use or industrial use. More particularly, the eccentric cam converts a diaphragm into a linear motion by connecting a motor shaft to an eccentric shaft. It relates to a fuel blower for a fuel cell, which allows two blower heads to supply air.

In general, there are various types of air supply devices in a fuel cell system, but the basics of such air supply devices include blowers for supplying air from outside air, but the blowers are driven by shafts, Noise is generated and power consumption is increased.

Typically, in the fuel cell system, an air flow path is formed such that air used in the heat exchanger is supplied to the inlet of the cathode to cool the fluid discharged from the cathode outlet, and the air is supplied through the blower.

Looking at the prior art in this field, the blower for the fuel cell system of Patent Publication No. 2010-0125895 of Figure 1,

Casing;

A rotating shaft provided inside the casing;

A blower mounted to the rotary shaft and configured to flow a gas in a direction parallel to the rotary shaft; And

The cooler for cooling the rotary shaft drive unit mounted on the rotary shaft by using the gas separated from the gas flowing by the blower; but the conventional fuel system blower is blower after the air is sucked in one direction By the configuration to discharge the air in the other direction by the discharge amount of air compared to the outer size of the blower is inefficient, takes a wide installation space, there is a problem of high noise and vibration.

The present invention is to solve the above problems, by connecting the motor shaft with the eccentric shaft, the eccentric cam of the eccentric shaft converts the dia-ram ram into a linear reciprocating motion to supply air from the two blower heads on both sides The present invention relates to a cathode blower for fuel cells, which aims to reduce the size of the blower and to reduce noise and power consumption due to flow path interference.

According to an aspect of the present invention,

An eccentric shaft connected to the shaft of the blower motor and installed inside the casing;

A first eccentric cam and a second eccentric cam installed on the eccentric shaft;

A first rod and a second rod connected to one side of the first and second eccentric cams integrally with the rotational movement of the eccentric shaft to linearly reciprocate;

Diamond rams coupled to the first rod and the second rod end and installed in the first and second blower heads, respectively;

And a discharge port and a suction port respectively formed in the first blower head and the second blower head such that air is drawn in and out by driving the diaphragm.

The balance is further installed on one side of the eccentric shaft in which the two eccentric cams are installed.

The eccentric shaft end portion is characterized in that the bearing is fixed to the casing.

The diaphragm is characterized in that the metal wheel having a resistance to air compression is embedded in the interior.

In the present invention as described above, by installing two eccentric cams on the eccentric shaft installed in the motor shaft to discharge the air intake in both directions, the discharge amount of the air is doubled, and by installing a bearing at the end of the eccentric shaft, It has the effect of preventing and at the same time has a feature that can reduce the structural volume of the blower.

The cathode blower for a fuel cell of the present invention converts the rotational movement of the eccentric shaft into linear reciprocating motion by the first rod and the second rod formed on the two eccentric cams installed on the eccentric shaft to supply air by a diaphragm made of rubber pads. Therefore, it has the effect of applying an eco-friendly blower to home and industrial hydrogen fuel cell systems that can reduce the size of the blower and reduce noise and power consumption.

1 is an operation cross-sectional view showing a conventional fuel cell system.
Figure 2 is a blower overall coupling configuration of the present invention.
Figure 3 is a block diagram showing the earthenware sphere and the suction inlet formed on both blower heads of the present invention.
4 is a cross-sectional view of a diaphragm installed in the blower head of the present invention.
Figure 5 is a schematic view of the check valve installed in the discharge port and the suction port of the present invention.
6A and 6B are front and sectional views of a balance weight provided on the eccentric shaft of the present invention.
Figure 7 is an illustration of a blower operating state of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an overall combined configuration diagram of the present invention, wherein the motor 2, the eccentric shaft 3 connected eccentrically to the motor shaft, the first eccentric cam 4a and the second eccentric installed on the eccentric shaft 3 are shown in FIG. Dia-flame 10 and eccentric shaft 3 which are provided at the ends of the first rod 4b and the second rod 5b integrally formed with the cam 5a, the first and second eccentric cams 4a and 5a. And a first blower head 7 and a second blower head 8 incorporating a casing 6 to house components connected to the diaphragm and dia diaphragms 10 on both sides.

The blower 1 of the present invention configured as described above is provided with a discharge port 9a and a suction port 9b to discharge and suck air from both sides of the first blower head 7 and the second blower head 8. .

The eccentric shaft 3 connected to the shaft of the motor 2 of the present invention is connected so that an eccentricity of 2 mm-5 mm is made from the center line of the motor shaft.

The motor shaft and the eccentric shaft 3 are connected by a connector such that the center line of the motor 2 axis and the center line of the eccentric shaft are shifted from each other by 2 mm to 5 mm. The spaced eccentric distance connecting the eccentric shaft so that the motor shaft and the eccentric shaft 2 are shifted by 2 mm-5 mm may vary depending on the size of the blower 1, but is preferably shifted by 2 mm or 3 mm eccentricity.

When the motor shaft rotates, the eccentric shaft 3 connected as described above rotates eccentrically like a cam from the center line of the motor shaft.

In addition, the two first eccentric cam (4a) and the second eccentric cam (5a) provided on the eccentric shaft is eccentrically rotated by the eccentric shaft, integrally formed on one side of the first, second eccentric cam (4a) (5a) The first rod 4b and the second rod 5b are installed in opposite directions to convert the eccentric shaft into a linear reciprocating motion.

The first rod 4b and the second rod 5b have end diaphragms 10 made of any one of a rubber material or a synthetic resin having elasticity, and the first rod 4b linearly reciprocates the rotational movement of the eccentric shaft 3. The diaphragm 10 coupled by the rod 4b and the second rod 5b respectively supplies the air by repeatedly compressing, discharging and sucking the air in the blower head.

At this time, the air pumping speed of the diaphragm varies depending on the number of rotations of the motor, and the rotation speed of the motor can be arbitrarily adjusted.

The blower is the eccentric shaft (3), the first and second eccentric cam (4a) (5a), the first rod (4b), the second rod (5b) is located inside the casing (6), diaphragm 10 Are respectively installed in both blower heads 7 and 8 so as to pump air.

Discharge ports 9a and suction ports 9b are formed at outer sides of the blower heads of the present invention to allow suction and discharge of air during the pumping action of the blowers.

In addition, a balance weight 30 is installed at one side of the second eccentric cam 5a of the eccentric shaft 3 to serve as a propellant while serving as a center weight during rotation of the eccentric shaft and linear reciprocation of the first rod and the second rod. do.

In addition, the bearing portion 40 is installed at the distal end of the eccentric shaft (3) is coupled to the casing (6), so that the eccentric shaft rotates stably while supporting the distal end to prevent noise and the eccentric shaft is inclined to one side. Done. The bearing 40 uses a bearing made to accommodate eccentric rotation of the eccentric shaft.

Fig. 3 is a configuration diagram showing the inlet and the discharge formed in the blower head of the present invention, in which the inlet 9b and the outlet 9a are formed on both sides of the outer surface center of the blower head 7 and 8 in which both sides are located.

The suction port 9b and the discharge port 9a drive the blower 1 when the diaphragm 10 sucks and compresses air by the linear reciprocating motion of the first rod 4b and the second rod 5b. Air enters and exits.

That is, when the diaphragm 10 coupled to the first rod and the second rod end respectively compresses and pushes air, the discharge port is opened to supply air, and when the diaphragm 10 compresses and moves backward, the discharge port is closed and the suction port is closed. The action of opening and sucking air is repeated.

The discharge port 9a and the suction port 9b are equally provided in the first and second blower heads 7 and 8 on both sides, respectively.

Figure 4 is a cross-sectional view of the diaphragm installed in the blower head of the present invention, the material of the diaphragm may be made of any one of a rubber material or a flexible synthetic resin.

The dia-flavor has an overall shape in a plate shape and has a through hole 11 connected to an end portion of the first rod 4b and the second rod 5b at the center thereof, and an edge of the edge protrudes to one side. Is formed, a circular groove 13 is formed on the opposite side of the inner side of the annular frame 12 protrudes adjacent to the annular frame.

In addition, the wheel body 14 is formed inside the circular groove 13, the plate and protrudes to one side than the circular groove 13.

Metal wheels 14 in the form of discs are embedded in the wheel bodies 14 so that the diaphragm 10 has a bearing force of the wheel bodies when the air is compressed and suctioned.

Therefore, the annulus 12 formed at the edge of the dia-fram supports the diaphragm in a state where the diaphragm 10 is sandwiched between the casing 6 and the second and second blower heads 7 and 8 in a fixed state. And a groove formed in a circular shape along the circumference of the wheel body 14 so as to be proximate to the inside of the annulus 12, and is formed thinner than the periphery so that the wheel body is formed on the first rod 4b and the second rod 5b. When pumping action is used for expansion. In other words, the groove portion relaxes when the wheel body moves in and out of the left and right sides, thereby acting as an elastic part.

Figure 5 is a schematic view of the check valve installed in the discharge port and the suction port of the present invention, the check valve 20 is a disk wheel shape, the protruding shaft 21 is formed on one side of the central portion and the groove 22 is formed on the protruding jaw outer peripheral surface Is installed in the inlet (9b) and the discharge port (9a) so that the pumping action of the diaphragm 10 can be repeatedly opened and closed so that air can enter and exit.

The check valve may be used as any one of a metal, a synthetic resin, a special member, and the like, which can smoothly perform an opening and closing action to allow air to enter and exit.

6A and 6B are front and cross-sectional views of a balance weight provided on the eccentric shaft of the present invention, in which a eccentric shaft fitting hole 31 is formed so as to be eccentric on one side of the center portion in the form of a circular disk, and between the balance weight 30 thicknesses; A fixing bolt fastening hole 32 is formed to penetrate from the outer surface to the eccentric shaft fitting hole in the transverse direction.

As described above, the balance weight is fitted to the eccentric shaft through the fitting hole, and then the balance weight is coupled to the wick core shaft through the fixing bolt fastening hole 32 on one side.

The balance weight coupled to the eccentric shaft as described above is a central weight that serves as a propellant during the pumping operation.

7 is an exemplary blower operating state of the present invention, as shown in (a) and (b) of FIG. 7 and the first rod 4b of the first eccentric cam 4a installed on the eccentric shaft 3; The second rods of the second eccentric cam 5a are installed in opposite directions, and the second rod and the second rod are linearly reciprocated by the rotational movement of the core shaft, thereby pumping the diaphragm installed at each end to supply air. do.

At this time, while the second rod 5b on one side installed on the eccentric shaft pushes the dia ram coupled to the end to compress air, the dia ram is advanced outward and the dia ram mounted on the first rod end in the opposite direction is the core shaft. In the same direction as in FIG. 7 (a). On the contrary, when the first rod compresses the dia ram, the dia ram coupled to the end of the first rod is advanced outward by a predetermined distance. The diaphragm of the second rod located in the opposite direction is moved to the eccentric shaft side by a predetermined distance (see Fig. 7 (b)).

When the motor of the present invention is driven, the eccentric shaft rotates and the first rod 4b of the first eccentric cam 4a coupled to the eccentric shaft is advanced or retracted. The first rod 4b of the other eccentric cam 4a installed is pumped by reversing or reversing the darafurem installed at the end.

At this time, when the first rod advances and pushes the dia ram, the second rod on the opposite side reverses and pulls the dia ram coupled to the end, so that the dia ram of the first rod and the dia ram of the second rod are compressed and intake with each other. Alternately repeats the action.

The present invention thus achieved serves to cool the fluid discharged from the outlet of the cathode as a blower (1) used in the fuel cell. The blower of the present invention is installed with a cathode blower which is usually installed.

In addition, the present invention has a feature that the blower is compactly formed to limit the installation space, and compared to the external size, the diaphragms on both sides alternately repeatedly pump at a high speed, thereby increasing the efficiency of performance.

In addition, the present invention has the effect of increasing the power saving efficiency as shown in Table 1 below by changing the pipe position to move the fluid from one side to the center.

As can be seen in Table 1, the blower of the present invention has an efficiency increase of 1.1%, which can be seen that the power saving efficiency is improved compared to the conventional blower.

In addition, the present invention configures the blower heads on both sides of the blower and allows the air to be sucked or discharged by the pumping of the diaphragm installed therein, compared to the blower which supplies the air to one side by the existing one blower head only. It can be seen from Table 2 that this improvement is more than two times.

As can be seen in Table 2, the efficiency of the conventional one head is 7.5%, whereas the two head blowers of the present invention can be seen to improve the efficiency to 13.4%.

As described above, the present invention improves the power saving efficiency and the air supply efficiency compared to the conventional cathode blower, and in the case of Korea, the cathode blower is mostly dependent on the import, but the high quality cathode blower is developed by the present invention. At the same time, it has the advantage of economic benefits of the country by replacing imported products.

For reference, the cathode blower of the present invention is used in a fuel cell system for home use or industrial use. The blower applied to the fuel cell system includes a fuel booster blower, a burner air blower, a selective oxidation blower, and a cathode blower. The present invention relates to a double cathode blower to improve the function and effect of the blower.

1: blower 2: motor
3: eccentric shaft 4a: first eccentric cam
5a: 2nd eccentric cam 4b: 1st rod
5b: Second load 6: casing
7: first blower 8: second blower
9a: outlet 9b: inlet
10: Diaphragm 20: Check valve
30: Balance weight 40: Bearing

Claims (3)

In the caterpillar blower,
An eccentric shaft 3 which is eccentrically connected to the shaft of the motor 1 and installed inside the casing 6;
A first eccentric cam 4a and a second eccentric cam 5a provided on the eccentric shaft;
A first rod 4b and a second rod 5b which are integrally connected to one side of the first and second eccentric cams so as to linearly reciprocate the rotational movement of the eccentric shaft;
A diaphragm (10) coupled to the first rod and the second rod end and respectively installed in the first blower head (7) and the second blower head (8);
And a discharge port (9a) and a suction port (9b) respectively formed in the first blower head and the second blower head so that air is drawn in and out by driving the diaphragm. The method of claim 1,
A cathode blower for a fuel cell, wherein the eccentric shaft on which the two eccentric cams are installed has a balance added to one side. The method of claim 1,
The eccentric shaft is a fuel blower for the fuel cell, characterized in that the end portion is installed in the bearing to fix the casing to reduce noise and prevent unilateral wear.

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